WO2006077808A1 - Color filter substrate for organic electroluminescent device - Google Patents

Abstract

A color filter substrate for organic EL device having excellent balance in color characteristics of three primary colors which enables to obtain a high-luminance and high-efficiency organic EL display and is applicable to an organic EL display having a white light-emitting layer. The color filter substrate for organic EL device is characterized by comprising a transparent substrate, a coloring layer patterned on the transparent substrate, and a color conversion layer partially formed on the coloring layer.

Description

 Specification

 Color filter substrate for organic-elect mouth luminescence device

 Technical field

 [0001] The present invention relates to a color filter substrate for an organic EL element used in an organic electoluminescence (hereinafter abbreviated as EL) display device.

 Background art

 An organic EL element has a structure in which a light emitting layer is sandwiched between an anode and a cathode in principle. Actually, when configuring an organic EL display device for color display using organic EL elements, (1) a method in which light emitting layers that emit each of the three primary colors are arranged, and (2) a light emitting layer that emits white light. In addition, there are a color filter system combining three primary color layers, and (3) a color conversion system combining a light emitting layer emitting blue light and a color conversion layer converting blue light to green light and red light, respectively.

 [0003] In the method (1), it is necessary to make the characteristics of the light emitting layers that emit light of each color uniform, and there is a problem that high-definition patterning is difficult. Therefore, the color filter method (2) and the color conversion method (3) are attracting attention. Since these methods only require the use of a single type of light-emitting layer, there is no problem like the method (1) above.

[0004] However, the color conversion method (3) has a problem that the phosphor in the color conversion layer is excited by external light and the contrast is lowered. For this reason, a colored layer is generally formed between the color conversion layer and the transparent substrate. In addition, the color purity can be improved by providing a colored layer. However, since the color conversion layer is relatively thick, there is a problem in that the light use efficiency is low because light emitted from the phosphor is scattered due to scattering.

[0005] In the color filter system (2), a color conversion layer may be formed between the light emitting layer and the colored layer for hue correction. However, in this case as well, similarly, since the color conversion layer is relatively thick, light leaks due to light scattering and the like. As described above, hue correction and luminance, that is, light extraction efficiency are incompatible with each other, and it is difficult to achieve both improvement in color purity and luminance.

 [0007] Examples of improving the luminance by increasing the light extraction efficiency include a method of providing a light-shielding portion having reflectivity between the color conversion layers (see, for example, Patent Document 1), A method of adjusting the refractive index of the layers formed between them (for example, see Patent Document 2) has been proposed. However, no example has been reported in which the brightness is improved by the configuration of the color conversion layer itself.

 [0008] In addition, active research has been conducted on a method for obtaining a light emitting layer that emits white light used in the color filter method of (2) above. For example, a method using a light emitting material that emits white light, or a complementary color relationship. A method using a light emitting material of a plurality of colors has been proposed. Among these, since there are few light emitting materials that emit white light, a method using light emitting materials of a plurality of colors having a complementary color relationship has become the mainstream.

 [0009] When using light emitting materials of a plurality of colors, it is known to select a blue light emitting material and an orange light emitting material that is a complementary color thereof (see, for example, Patent Document 3). The emission spectrum of white light obtained by this method has two wavelength peaks, blue and red, derived from blue light emitting materials and orange light emitting materials. For this reason, when such white light passes through the colored layer, red light and blue light are actually observed strongly, and green light is hardly observed. Therefore, organic EL using a light emitting layer that emits white light is used. The display device has a problem that the color characteristics of the three primary colors are not well balanced.

 Patent Document 1: Japanese Patent Application Laid-Open No. 2004-288447

 Patent Document 2: Japanese Patent Laid-Open No. 2003-077680

 Patent Document 3: Japanese Patent Laid-Open No. 9-63770

 Disclosure of the invention

 Problems to be solved by the invention

[0011] The present invention has been made in view of the above problems, and it is possible to obtain an organic EL display device having high luminance and high efficiency, and is applicable to an organic EL display device having a white light emitting layer. The main objective is to provide a color filter substrate for organic EL elements that has an excellent balance of color characteristics of the three primary colors. Means for solving the problem

 In order to achieve the above object, the present invention provides a transparent base material, a colored layer formed in a pattern on the transparent base material, and a color conversion layer partially formed on the colored layer. The present invention provides a color filter substrate for an organic EL device characterized by comprising:

 In the present invention, since the color conversion layer is partially formed on the colored layer, the organic EL display device using such a color filter substrate for an organic EL element emits light from the light emitting layer. A part of them pass through the color conversion layer. At this time, incident light is absorbed by the color conversion phosphor in the color conversion layer and fluorescence is emitted. This fluorescence is scattered by other color conversion phosphors in the color conversion layer and from the side of the color conversion layer. Leaks. In the present invention, since the color conversion layer is partially formed on the colored layer, this scattered and leaked light can be emitted from a region where the color conversion layer on the colored layer is not formed. As a result, the light scattered and leaked in the color conversion layer can be efficiently extracted, and the luminance can be improved. Therefore, by using the organic EL element color filter substrate of the present invention, it is possible to provide an organic EL display device with high luminance and high efficiency.

 In addition, as described above, the force in which hue correction and luminance are incompatible with each other In the present invention, the above-described configuration makes it possible to achieve both high color purity and high light extraction efficiency.

 [0014] Further, when the color filter substrate for an organic EL element of the present invention is used for an organic EL display device having a white light emitting layer, for example, white light generally emitted from the white light emitting layer is composed of red light and blue light, and green light. In the present invention, for example, among the red color conversion unit, the green color conversion unit, and the blue color conversion unit, each of the red color conversion unit and the blue color conversion unit is provided. The green light component can be increased by forming partly on the colored part and making the area of the green color conversion part larger than the area of each of the red color conversion part and the blue color conversion part. Therefore, it is possible to provide an organic EL display device that is excellent in the balance of the color characteristics of the three primary colors.

In the above invention, it is preferable that the color conversion layer is formed in a pattern on the colored layer. Since the color conversion layer is formed in a pattern on the colored layer, the surface area of the color conversion layer is increased, so that light scattered and leaked in the color conversion layer can be more efficiently This is because it can be taken out and the luminance can be further improved.

 In the present invention, the colored layer has a red colored portion, a green colored portion, and a blue colored portion, and the color conversion layer is partially formed on the red colored portion. And at least one of a green color conversion portion partially formed on the green coloring portion. Each color conversion part is partially formed on each colored part, so that light scattered and leaked in each color conversion part can be taken out efficiently, improving the brightness of red light and green light It is because it can be made.

 [0017] In the above invention, the red color conversion part may not be formed on the red coloring part. This is because when the incident light is white light including components of red light and blue light, for example, a red color conversion unit that converts the incident light into red light may not be formed. In addition, it is advantageous in terms of cost because it is not necessary to repeat the patterning process, and the manufacturing process is simplified.

 In the present invention, it is preferable that a flat layer is formed on the color conversion layer. This is because the colored layer and the color conversion layer can be protected by forming the planarizing layer. In addition, when the color filter substrate for an organic EL element of the present invention is used in an organic EL display device, the influence at the time of forming the transparent electrode layer is reduced, and the occurrence of uneven thickness at the time of forming the organic EL layer is prevented. Because it can.

 In this case, the flat layer may have a light scattering property. Since the flat layer has light scattering properties, the light converted by the color conversion layer is prevented from leaking in a direction horizontal to the transparent substrate, and the direction perpendicular to the transparent substrate (observation) This is because it is possible to efficiently extract light to the person side.

 Furthermore, in the present invention, the colored layer has a red colored portion, a green colored portion, and a blue colored portion, and the color conversion layer includes a green color converted portion formed on the green colored portion. At least, the area of the green color conversion part is larger than the area of each of the red color conversion part formed on the red color part and the blue color conversion part formed on the blue color part. It is preferable.

When the color filter substrate for an organic EL element of the present invention is used in, for example, an organic EL display device having a white light emitting layer, white light generally emitted from the white light emitting layer is red light and Although it is often composed of blue light and has a small amount of green light component, in the present invention, a green color conversion unit that converts incident light into green light is formed, and the area of this green color conversion unit is defined as a red color conversion unit and a blue color. This is because the green light component can be increased by making the area larger than each area of the color converter. As a result, it is possible to provide an organic EL display device that is excellent in the balance of the color characteristics of the three primary colors.

 In the above invention, it is preferable that the red color conversion portion and the blue color conversion portion are not formed. That is, the color conversion layer preferably has only a green color conversion part formed on the green coloring part. This is because there is no need to repeat the patterning process, which is cost-effective and the manufacturing process is simplified.

 [0022] In this case, the difference between the thickness of the red colored portion, the combined thickness of the green colored portion and the green color converting portion, and the thickness of the blue colored portion may be 2. Ozm or less. I like it. This is because if the difference in thickness is too large, a step (concave / convex) due to the configuration of the colored layer and the color conversion layer becomes large, and it becomes difficult to flatten the surface.

 [0023] In this case, the thickness of the red colored portion, the combined thickness of the green colored portion and the green color converting portion, and the thickness of the blue colored portion are within the range of 1 / im to 3 / im. It is preferable that This is because it is difficult to form a red colored portion and a blue colored portion that are too thick, and it is also difficult to form a green color converting portion that is too thin. In particular, if the concentration of the green conversion phosphor in the green color conversion portion is too high in order to form a thin green color conversion portion, concentration quenching may occur.

 [0024] Further, in the present invention, a green color conversion portion may be formed on the red coloring portion. Most of the green light emitted from the green color conversion part cannot pass through the red colored part, but the long wavelength side component of the green light is used as the short wavelength side component of the red light. Since it can be transmitted, it is possible to adjust the hue with such a configuration.

In the present invention, it is preferable that a flat layer is formed on the color conversion layer. This is because the colored layer and the color conversion layer can be protected by forming the planarizing layer. In addition, when the color filter substrate for an organic EL device of the present invention is used in an organic EL display device, the influence at the time of forming the transparent electrode layer is reduced, and the thickness at the time of forming the organic EL layer is reduced. This is because generation of unevenness can be prevented.

 Furthermore, in the present invention, it is preferable that a gas barrier layer is formed on the color conversion layer. Due to the formation of the gas barrier layer, when the color filter substrate for an organic EL device of the present invention is used in an organic EL display device, it is vulnerable to water vapor, oxygen, or desorbed gas from a colored layer or a color conversion layer. They can protect the organic EL layer, which is a member, from such gases.

 In the present invention, a light shielding part may be formed between the colored layers on the transparent substrate. This is because the formation of the light-shielding portion partitions the light emitting area for each pixel, prevents reflection of external light at the boundary between the light emitting areas, and increases the contrast.

 [0028] The present invention also provides the above-described color filter substrate for an organic EL element, a transparent electrode layer formed on the color conversion layer side surface of the color filter substrate for the organic EL element, and the transparent electrode layer. An organic EL display device comprising: an organic EL layer including at least a light emitting layer; and a counter electrode layer formed on the organic EL layer.

 [0029] Since the organic EL display device of the present invention uses the above-described color filter substrate for organic EL elements, light scattered and leaked in the color conversion layer can be efficiently extracted, and luminance can be improved. Is possible. Therefore, high brightness and high efficiency can be realized.

 [0030] In the above invention, the light emitting layer preferably emits white light with a two-wavelength light source. In general, white light emitted from a light-emitting layer that emits white light includes red and blue light components and often does not include a green light component. However, in the present invention, for example, the green color conversion portion is replaced with the green coloring portion. By partially forming on the top, the brightness of green light can be improved. Further, for example, by making the area of the green color conversion unit larger than the areas of the red color conversion unit and the blue color conversion unit, it is possible to increase the green light component. Therefore, an organic EL display device having an excellent balance of the color characteristics of the three primary colors can be obtained.

 The invention's effect

[0031] In the present invention, since the color conversion layer is partially formed on the colored layer, light scattered and leaked in the color conversion layer can be efficiently extracted, and luminance can be improved. so There is an effect that can. Therefore, in the organic EL display device using the color filter substrate for the organic EL element of the present invention, high luminance and high efficiency can be realized.

 In addition, when the color filter substrate for an organic EL element of the present invention is used for an organic EL display device having a white light emitting layer that emits white light, for example, a green color conversion portion is partially formed on the green coloring portion, thereby forming a green color. The luminance of light can be improved, and the green light component can be increased by making the area of the green color conversion unit larger than the area of each of the red color conversion unit and the blue color conversion unit. Therefore, the organic EL display device using the color filter substrate for the organic EL element of the present invention has an effect that the balance of the color characteristics of the three primary colors is excellent.

Brief Description of Drawings

1] A schematic cross-sectional view showing an example of a color filter substrate for an organic EL device of the present invention. 2] A schematic cross-sectional view showing another example of the color filter substrate for organic EL elements of the present invention. 3) A schematic cross-sectional view showing another example of the color filter substrate for organic EL elements of the present invention. ] Is a schematic sectional view showing another example of the color filter substrate for organic EL elements of the present invention. 5] This is a schematic sectional view showing another example of the color filter substrate for organic EL elements of the present invention. It is a schematic sectional drawing which shows an example of the organic electroluminescent display apparatus of invention.

7] A schematic cross-sectional view showing another example of the color filter substrate for an organic EL element of the present invention. 8] A schematic cross-sectional view showing another example of the color filter substrate for an organic EL element of the present invention. FIG. 10 is a schematic sectional view showing another example of the color filter substrate for an organic EL element of the present invention. FIG. 10 is a schematic sectional view showing another example of the organic EL display device of the present invention. 11] An explanatory diagram for explaining the green color conversion unit in the first embodiment.

 Explanation of symbols

 1 ··· Transparent substrate

 2 Colored layer

 2R ··· Red colored part

 2G ··· Green colored part

 2B ··· Blue colored part

 3 ··· Color conversion layer

 3R ··· Red color converter

 3G ··· Green color converter

 3B ··· Blue color converter

 3R ', 3B'… Transmission part

 4 ··· Shading part (black matrix)

 5 ... Planarization layer

 6 ··· Gas barrier layer

 10 ··· Color filter substrate for organic EL elements

 11 ··· Transparent electrode layer

 12 ··· Organic EL layer

 13 ··· Counter electrode layer

 20 ···· Organic EL display

 BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, the color filter substrate for an organic EL element of the present invention and the organic EL display device using the same will be described in detail.

[0035] A. Color filter substrate for organic EL element

 The color filter substrate for an organic EL element of the present invention comprises a transparent base material, a colored layer formed in a pattern on the transparent base material, and a color conversion layer partially formed on the colored layer. It has a special number.

The color filter substrate for an organic EL device of the present invention can be divided into two embodiments. The In the following, each embodiment will be described separately.

 [0036] I. First embodiment

 In the first embodiment of the color filter substrate for an organic EL device of the present invention, a transparent substrate, a colored layer formed in a pattern on the transparent substrate, and a portion formed on the colored layer are formed. And a color conversion layer.

[0037] The color filter substrate for organic EL elements of this embodiment will be described with reference to the drawings.

 FIG. 1 is a schematic cross-sectional view showing an example of a color filter substrate for an organic EL element of this embodiment. As shown in FIG. 1, in the color filter substrate 10 for the organic EL element of the present embodiment, the coloring composed of the red coloring portion 2R, the green coloring portion 2G, and the blue coloring portion 2B on the transparent substrate 1. Layer 2 and a color conversion layer 3 composed of a red color conversion part 3R formed on the red coloring part 2R and a green color conversion part 3G formed on the green coloring part 2G are sequentially formed. A flat color layer 5 is formed so as to cover the coloring layer 2 and the color conversion layer 3. A black matrix 4 is formed between the colored portions 2R, 2G, and 2B of the coloring layer 2. The red color conversion unit 3R and the green color conversion unit 3G are partially formed on the red coloring unit 2R and the green coloring unit 2G, respectively. A transparent portion that transmits incident light is formed on the blue colored portion 2B.

 Note that it is not necessary to form three transmissive portions in FIG. In addition, when the transmission part is not formed, the thickness of the blue coloring part 2B is changed to the total thickness of the red coloring part 2R and the red color conversion part 3R or the green coloring part 2G and the green color conversion for the purpose of film thickness adjustment. The thickness may be about the same as the total thickness of part 3G.

 [0038] When an organic EL display device is manufactured using the color filter substrate for an organic EL element shown in FIG. 1, a transparent electrode layer, a light emitting layer, and a counter electrode layer are sequentially laminated on the planarizing layer 5. It is. In such an organic EL display device, part of the light that also has a light emitting layer force passes through the color conversion layer 3 and further passes through the coloring layer 2, and the other part passes through the color conversion layer 3. Without passing through the colored layer 2.

[0039] For some of the light transmitted through the color conversion layer 3 and the color layer 2, incident light is absorbed and emitted by the color conversion phosphor in the color conversion layer 3, so that light whose hue has been corrected is used. It becomes. The hue-corrected light is scattered by other color conversion phosphors in the color conversion layer 3 and leaks from the side surface of the color conversion layer 3. In the present invention, the color conversion layer 3 is the colored layer 2 in the present invention. Since it is partially formed on the top, the scattered light leaked can be emitted from a region on the colored layer 2 where the color conversion layer 3 is not formed. As a result, the light scattered and leaked in the color conversion layer can be extracted efficiently, and the luminance can be improved.

[0040] In particular, when an inorganic phosphor is used as the color conversion phosphor, the inorganic phosphor is generally opaque, and the fluorescence emitted from one inorganic phosphor in the color conversion layer is different from other inorganic phosphors. Since the phosphor cannot be transmitted, the luminance can be effectively improved by adopting the configuration of this embodiment.

 Hereinafter, each configuration of the color filter substrate for the organic EL element of the present embodiment will be described.

 [0041] 1. Color conversion layer

 The color conversion layer used in this embodiment is partially formed on the colored layer. The formation position of the color conversion layer is not particularly limited as long as it is a part of the color layer. For example, as shown in FIG. 1, the color conversion layer 3 (3R, 3G, 3G) may be formed. As shown in FIG. 2, the color conversion layer 3 (3R, 3G) may be formed on the colored layer 2 (2R, 2G). Further, for example, as shown in FIG. 1, the color conversion layer 3 (3R, 3G) may be formed in one place on the colored layer 2 (2R, 2G). For example, as shown in FIG. 3 (3R, 3G) may be formed in a pattern on the colored layer 2 (2R, 2G).

 [0042] The color conversion layer used in the present embodiment is one in which a color conversion phosphor that absorbs incident light and emits fluorescence of each color is dispersed or dissolved in a resin. As the color conversion phosphor, either an inorganic phosphor or an organic phosphor can be used.

[0043] When an inorganic phosphor is used as the color conversion phosphor, the color conversion layer is preferably formed in a pattern on the colored layer. This is because the inorganic phosphor is generally opaque as described above, and the light emitted from one inorganic phosphor in the color conversion layer cannot be transmitted through the other inorganic phosphor and is scattered. This is because it is preferable to increase the surface area of the color conversion layer in order to efficiently extract the scattered and leaked light and improve the luminance. . Therefore, when an inorganic phosphor is used, the color conversion layer is preferably formed in a fine pattern on the colored layer. At this time, since it is difficult to form a pattern that is too fine, it is preferable to select the fineness of the color conversion layer pattern in consideration of the intended luminance and patterning characteristics.

On the other hand, when the organic phosphor is used, the preferred formation position of the color conversion layer is not particularly limited. For example, the color conversion layer may be formed at one place on the colored layer. The pattern is formed on the colored layer.

[0045] The occupied area ratio of the color conversion layer to the colored layer in the present embodiment is not particularly limited as long as the light extraction efficiency is improved and high luminance is obtained, but when an inorganic phosphor is used. The preferred range differs depending on whether an organic phosphor is used. When the inorganic phosphor is used, the ratio of the area occupied by the color conversion layer to the colored layer is preferably about 20 to 90, where the area of the colored layer is 100, preferably S, more preferably 50 to 80, and even more preferably. Is in the range 70-80. On the other hand, when the organic phosphor is used, the occupied area ratio of the color conversion layer to the colored layer is preferably about 70 to 100, more preferably 80 to 98, and more preferably 80 to 98, where the area of the colored layer is 100. Preferably it is in the range of 85-95. In any case, if the ratio of the area occupied by the color conversion layer to the colored layer is too small, the color conversion efficiency may be reduced. Conversely, if the ratio is too large, the color that can be scattered and leaked in the color conversion layer can be emitted. This is because the area on the layer becomes narrow, so that the light extraction efficiency is lowered, and there is a possibility that the brightness enhancement effect cannot be obtained.

 [0046] The "occupied area ratio of the color conversion layer to the colored layer" referred to here is, for example, a component of the color conversion layer 3 (color converter) as shown in Fig. 1 and a component of the 3R colored layer 2 (Colored portion) The ratio of the occupied area with respect to 2R is measured and does not mean the occupied area ratio of the entire color conversion layer to the entire colored layer.

 [0047] The thickness of the color conversion layer is not particularly limited as long as the light extraction efficiency is improved and high luminance can be obtained. The range is different.

[0048] When an inorganic phosphor is used, the thickness of the color conversion layer is preferably about 0 to about ίθzm, more preferably about 0.5 μm to 5 μm, and even more preferably about 1 μm. m to 3 μm It is within the range. This is because if the color conversion layer is too thick, the light emitted from one inorganic phosphor cannot pass through the other inorganic phosphor as described above, and there is a risk S that the luminance may decrease. Conversely, if the color conversion layer is too thin, the color conversion efficiency may be reduced. Although it is possible to reduce the thickness of the color conversion layer without reducing the color conversion efficiency by increasing the content of the inorganic phosphor in the color conversion layer, the inorganic phosphor in the color conversion layer If the content is too large, concentration quenching may occur. Therefore, when the content of the inorganic phosphor in the color conversion layer is increased to reduce the thickness of the color conversion layer, the thickness is appropriately selected in consideration of concentration quenching.

 On the other hand, when an organic phosphor is used, the thickness of the color conversion layer is preferably about 0.5 μm to 30 μm, more preferably 1 μm to 10 μm, and even more preferably. Is in the range of 3 μm to 5 μm. This is because if the thickness of the color conversion layer is too thick, the level difference (unevenness) due to the configuration of the color conversion layer becomes large, and it becomes difficult to flatten the surface. On the contrary, if the color conversion layer is too thin, the color conversion efficiency may decrease. Similarly to the above, concentration quenching may occur when the content of the organic phosphor in the color conversion layer is increased in order to reduce the thickness of the color conversion layer.

 [0050] The color conversion layer used in the present embodiment is provided corresponding to the colored layer, and usually three types of color conversion units, a red color conversion unit, a green color conversion unit, and a blue color conversion unit. It has something. In this embodiment, as described above, the color conversion layer is partially formed on the colored layer, but all three types of color conversion portions may be partially formed on the colored layer. One or two of the three types of color converters are partially formed on the colored layer.

 [0051] The configuration of the color conversion layer used in this embodiment differs depending on the configuration of the light emitting layer of the organic EL display device to which the organic EL element color filter substrate of this embodiment is applied.

[0052] When the color filter substrate for an organic EL element of the present embodiment is used in an organic EL display device having a blue light emitting layer that emits blue light, for example, the light incident on the color conversion layer generally includes a blue light component. Or it often contains blue and green light components. [0053] When the incident light to the color conversion layer includes a blue light component, the color conversion layer includes a red color conversion unit that converts the incident light into red light and a green color conversion that converts the incident light into green light. And at least a part.

 [0054] In this case, only the red color conversion portion may be partially formed on the red coloring portion. Only the green color conversion portion may be partially formed on the green coloring portion. The conversion part and the green color conversion part may be partially formed on each colored part. In particular, it is preferable that both the red color conversion portion and the green color conversion portion are partially formed on each colored portion. With such a configuration, light scattered and leaked in the red color conversion unit and the green color conversion unit can be efficiently extracted, and the power S can be further improved. In particular, when an inorganic phosphor is used as the color conversion phosphor, it is preferable that the red color conversion portion 3R and the green color conversion portion 3G are formed in a pattern as shown in FIG. 3, for example. As described above, by forming the red color conversion unit and the green color conversion unit in a pattern and increasing the surface area, the light scattered and leaked in the red color conversion unit and the green color conversion unit can be more efficiently obtained. This is because it can be taken out and the luminance can be further improved.

 [0055] In this case, since the incident light to the color conversion layer includes a blue light component, the blue color conversion unit does not need to perform color conversion in principle, so the blue color conversion unit is not formed. You don't have to. Therefore, nothing needs to be formed on the blue colored portion, but in order to flatten the surface of the color filter substrate for the organic EL element, for example, as shown in FIGS. A transmission part 3B ′ having the same thickness as 3G may be formed.

 This transmissive part transmits incident light, and when formed on a blue colored part, it is not particularly limited as long as it transmits blue light. For example, it does not include a color conversion phosphor, It can consist of resin mentioned later. In this case, since the transmissive part does not contain the color conversion phosphor, the entire surface on the blue colored part is not necessary if the manufacturing process is considered to be partially formed on the blue colored part to improve luminance. It is common for this to be formed.

[0056] On the other hand, when the incident light to the color conversion layer includes components of blue light and green light, the color conversion layer may have at least a red color conversion unit that converts the incident light into red light. Les. In this case, the red color conversion part is partially formed on the red coloring part. In particular, when an inorganic phosphor is used as the color conversion phosphor, it is preferable that the red color conversion portion is formed in a pattern. As described above, by forming the red color conversion part in a pattern and increasing its surface area, the light scattered and leaked in the red color conversion part can be taken out more efficiently, and the luminance can be improved. This is because it can be further improved.

 [0057] In this case, since the incident light to the color conversion layer includes components of blue light and green light, the blue color conversion unit and the green color conversion unit do not need to perform color conversion in principle. The blue color conversion unit and the green color conversion unit may not be formed. Therefore, nothing may be formed on the blue coloring portion and the green coloring portion, but in order to flatten the surface of the color filter substrate for the organic EL element, the thickness is about the same as that of the red color conversion portion. A transmissive part may be formed.

 This transmissive portion transmits incident light. When formed on the blue colored portion, the transmissive portion transmits blue light. When formed on the green colored portion, the transmissive portion transmits green light. If it does, it will not be specifically limited, For example, a color conversion fluorescent substance is not included but it can consist of resin mentioned later. In this case, since the transmissive part does not contain the color conversion phosphor, it is not necessary to be partially formed on each colored part in order to improve the brightness. It is common that each is formed.

[0058] Furthermore, when the color filter substrate for an organic EL element of the present embodiment is used for an organic EL display device having a white light emitting layer that emits white light, for example, incident light to the color conversion layer is generally red light and blue light. Often contains ingredients. Therefore, the color conversion layer may have at least a green color conversion unit that converts incident light into green light. In this case, for example, as shown in FIG. 4, the green color conversion portion 3G is partially formed on the green coloring portion 2G. In particular, when an inorganic phosphor is used as the color conversion phosphor, the green color conversion portion 3G is preferably formed in a pattern as shown in FIG. 5, for example. As described above, by forming the green color conversion part in a pattern and increasing its surface area, the light scattered and leaked in the green color conversion part can be extracted more efficiently, and the brightness is further improved. It is possible to make it happen. [0059] In this case, since the incident light to the color conversion layer includes components of red light and blue light, the red color conversion unit and the blue color conversion unit do not need to perform color conversion in principle. The red color conversion unit and the blue color conversion unit may not be formed. In this case, nothing may be formed on the red colored portion and the blue colored portion, but in order to flatten the surface of the color filter substrate for the organic EL element, for example, as shown in FIGS. Transmission parts 3R 'and 3B' having the same thickness as the conversion part 3G are formed, respectively.

 In the above description, the configuration of the color conversion layer according to the type of light emitting light source of the light emitting layer in the organic EL display device to which the color filter substrate for the organic EL element of the present embodiment is applied has been described. The configuration of the color conversion layer used in the embodiment is not particularly limited depending on the type of light emitting light source of the light emitting layer, as long as the color conversion layer can perform a desired color complementation.

 [0061] The green color conversion unit used in this embodiment is formed by dispersing or dissolving a green conversion phosphor that absorbs incident light and emits green fluorescence.

 [0062] As the green conversion phosphor, it is possible to use either an inorganic phosphor or an organic phosphor as described above.

 [0063] Specific examples of the inorganic phosphor used as the green conversion phosphor include rare earth complex phosphors disclosed in JP-A-2004-14335. Examples of rare earth complex-based phosphors include those having rare earth metals such as Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb. The ligand may be either aromatic or non-aromatic, and is preferably a compound represented by the following general formula (1).

 [0064] Xa- (Lx)-(Ly) _ (Lz) _Ya (1)

[0065] Here, in the formula, Lx, Ly, and Lz each independently represent an atom having two or more bonds, n represents 0 or 1, and Xa represents an atom that can be coordinated to the adjacent position of Lx. Y a represents a substituent having an atom that can be coordinated to the adjacent position of Lz. Any part of Xa and Lx may be condensed with each other to form a ring, and any part of Ya and Lz may be condensed with each other to form a ring. A ring may be condensed to form an aromatic hydrocarbon ring or aromatic heterocycle in the molecule. However, Xa- (Lx) (Ly) n- (Lz) — Ya is a β-diketone derivative, β-ketoester derivative, β-ketoamide derivative, or the oxygen atom of the ketone is replaced with a sulfur atom or N (R201) —, or crown Ether, azacrown ether, thiacrown ether, or an aromatic hydrocarbon ring or aromatic group when it represents a crown ether in which the oxygen atom of the crown ether is replaced with any number of sulfur atoms or —N (R201) There may be no heterocycle. In —N (R201) —, R201 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group.

 [0066] In the general formula (1), the coordinable atoms represented by Xa and Ya are specifically an oxygen atom, a nitrogen atom, a sulfur atom, a selenium atom, and a tellurium atom. Further, the atom having two or more bonds represented by Lx, Ly, and Lz is not particularly limited, and examples thereof include a carbon atom, an oxygen atom, a nitrogen atom, a silicon atom, and a titanium atom.

 [0067] Specific examples of the rare earth complex phosphors include rare earths containing Ba and Si such as Ba Eu SiO.

 2—a a 4

 Earth complex phosphor or rare earth complex system containing Ba and Mg such as Ba Eu MgAl O

 1 -a a 10 17

 Examples thereof include phosphors.

[0068] Specific examples of inorganic phosphors used as green conversion phosphors include alkaline earth metal thiogallate phosphors disclosed in JP-T-2004-505167, ZnS: Tb, etc. ZnS-based phosphors and yellow-green pigments (for example, FA005 (trade name) manufactured by Shinhiro Corporation) are also included.

 Furthermore, ZnS phosphors such as ZnS: Mn, ZnS: Mn / ZnMgS, (Y, Gd) 3A1 O: Ce

 A yellow phosphor such as 5 12 or an orange pigment (for example, FA001 (trade name) manufactured by Shinhiroine Earth) can also be used. These phosphors are not green phosphors, but each contain a green phosphor component, so that color complementarity is possible and can be used.

[0069] On the other hand, specific examples of the organic phosphor used as the green conversion phosphor include 2, 3, 5, 6 — 1H, 4H tetrahydro-8 trifluoromethylquinolidino (9, 9a, 1—gh). ) Coumarin, 3- (2'_Benzothiazolyl) 1-7-Jetylaminocoumarin, 3_ (2'_Benzimidazolinore) 1 7_N, N-Jetylaminocoumarin, 3_ (2'_N_Methyl 1-N, N-coumarin dyes such as jetylaminocoumarin; coumarin dyes such as basic yellow 51; naphthalates such as solvent yellow 11 or solvent yellow 116 Examples thereof include imide dyes.

 [0070] Examples of the organic phosphor include the above pigments and dyes such as polymethacrylic acid ester, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer resin, alkyd resin, aromatic sulfonamide resin, urea resin, melamine resin, A fluorescent pigment kneaded in advance in a benzoguanamine resin or a mixture of these resins may also be used.

 [0071] The above-described inorganic phosphor and organic phosphor may be used alone or in combination of two or more in order to adjust the hue of fluorescence.

 [0072] Specific examples of the inorganic phosphor used as the red conversion phosphor include rare earth complex phosphors. Specific examples of this rare earth complex phosphor include K Eu (WO

 5 2. 5

) And other rare earth complex phosphors containing K and W. In addition, rare earth complex

4 6. 25

 The other points of the phosphor are the same as in the above case.

 Furthermore, specific examples of inorganic phosphors used as red conversion phosphors include ZnS phosphors such as ZnS: Mn, ZnS: Mn / ZnMgS, or orange pigments (for example, FA001 (trade name) manufactured by Shinhiro Corporation). It is done.

[0073] On the other hand, specific examples of organic phosphors used as red-converting phosphors include cyanine dyes such as 4-disanomethylene-1,2-methyl 6- (p dimethylaminostyryl) 4H-pyran; 1 ethyl-2 -[4— (p-dimethylaminophenyl) 1,3-butabutenyl] —Pyridine dyes such as pyridinium perpark mouthrate; rhodamine B, rhodamine 6G, rhodamine 3B, rhodamine 101, rhodamine 110, sulforhodamine, basic violet 11, rhodamine dyes such as Basic Red 2; oxazine dyes; and the like.

 [0074] Examples of the organic phosphor include the above-described dyes such as polymethacrylic acid ester, polysulphated butyl, butyl chloride monoacetate butyl copolymer resin, alkyd resin, aromatic sulfonamide resin, urea resin, melamine resin, A fluorescent pigment kneaded in advance in a benzoguanamine resin or a mixture of these resins may also be used.

[0075] The inorganic phosphor and the organic phosphor described above may be used alone or in combination of two or more in order to adjust the hue of fluorescence. In general, the conversion efficiency from blue light to red light is low. it can.

 [0076] Specific examples of the resin used in each color conversion section include polymethyl methacrylate resin, polyacrylate resin, polycarbonate resin, polybutyl alcohol resin, polybutylpyrrolidone resin, hydroxyethyl cellulose resin, carboxymethyl cellulose. Examples thereof include transparent resins such as resins, polyvinyl chloride resins, melamine resins, phenol resins, alkyd resins, epoxy resins, polyurethane resins, polyester resins, maleic resins, or polyamide resins. Specific examples of the resin include an ionizing radiation curable resin having a reactive bur group such as an acrylate, metatalylate, polycinnamate bure, or cyclized rubber (in practice, an electron beam). Curable resin or ultraviolet curable resin, often the latter).

 [0077] The ratio of the resin in each color conversion section to each color conversion phosphor is preferably about 100: 0.3 to about 100: 5 (mass standard). This is because if the ratio of the color conversion phosphor is too small, sufficient color conversion efficiency may not be obtained, and if the ratio is too large, concentration quenching may occur.

 [0078] As a method of forming the color conversion layer, for example, a photolithography method, or the above-described color conversion phosphor and resin are mixed with a solvent, a diluent, or an appropriate additive as necessary to form a color conversion layer. The printing method which prepares a coating liquid and prints can be mentioned.

 [0079] 2. Colored layer

 The colored layer used in the present embodiment is formed in a pattern on a transparent substrate, and usually has a red colored portion, a green colored portion, and a blue colored portion. Each colored portion is regularly arranged corresponding to each pixel, and when a light shielding portion is formed, it is provided corresponding to the opening of the light shielding portion.

 [0080] Each colored portion used in this embodiment is obtained by dispersing or dissolving a colorant such as a pigment or a dye of each color in a binder resin.

[0081] Examples of the colorant used in the red coloring portion include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, and isoindoline pigments. These pigments may be used alone or in combination of two or more. [0082] Examples of the colorant used in the green coloring portion include phthalocyanine pigments such as halogen polysubstituted phthalocyanine pigments or halogen polysubstituted copper phthalocyanine pigments, triphenylmethane basic dyes, isoindoline pigments, and isoindolinones. And pigments. These pigments or dyes may be used alone or in combination of two or more.

 [0083] Examples of the colorant used in the blue colored portion include copper phthalocyanine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, and dioxazine pigments. These pigments may be used alone or in combination of two or more.

 In addition, as the binder resin used for each colored portion, a transparent resin is used.

[0085] When a printing method is used as a method for forming the colored layer, examples of the binder resin include a polymethyl methacrylate resin, a poly acrylate resin, a polycarbonate resin, a polybutyl alcohol resin, a polyvinyl pyrrolidone resin, and a hydroxyethyl cellulose resin. Carboxymethylcellulose resin, polyvinyl chloride resin, melamine resin, phenol resin, alkyd resin, epoxy resin, polyurethane resin, polyester resin, maleic acid resin, polyamide resin and the like.

[0086] When a photolithography method is used as a method for forming a colored layer, the binder resin is usually a reaction such as an acrylate, metatallate, polyvinyl cinnamate, or cyclized rubber. An ionizing radiation curable resin having a functional vinyl group is used. Usually, an electron beam curable resin or an ultraviolet curable resin is used.

 When an ultraviolet curable resin is used, a photopolymerization initiator is used alone or in combination with a binder resin. In addition, when using an ultraviolet curable photosensitive resin, a sensitizer, a coatability improver, a development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc. may be used as necessary. Good.

[0087] The content of the colorant is preferably in the range of 5 to 50% by weight in each colored portion. The binder resin content is preferably in the range of 30 to 100 parts by weight with respect to 100 parts by weight of the colorant.

[0088] The thickness of such a colored layer is usually about 1 μm to 3 μm. [0089] The arrangement of the colored portions is not particularly limited as long as the colored portions are arranged on an average when viewed macroscopically. For example, a stripe arrangement 1J, a mosaic arrangement IJ, a delta arrangement, etc. Are listed. Moreover, each coloring part may be formed for every opening part of the light-shielding part.

 [0090] As a method for forming a colored layer, a coloring agent is prepared by mixing, dispersing or solubilizing a coloring agent in a binder resin to prepare a colored layer forming coating solution, and using this colored layer forming coating solution, A patterning method using a phi method or a patterning method using a printing method using the colored layer forming coating solution is used.

 [0091] 3. Transparent substrate

 The transparent substrate used in this embodiment is a support that supports the color filter substrate for an organic EL element. In addition, when the organic EL display device is configured using the color filter substrate for the organic EL element of the present embodiment, it is disposed on the viewer side and is also a support that supports the entire organic EL display device. .

 [0092] As the transparent substrate, for example, an inorganic plate-like transparent substrate such as glass or quartz glass, an organic (for example, synthetic resin) plate-like transparent substrate such as acrylic resin, or a synthetic resin A transparent film substrate can be used. Very thin glass can also be used as a transparent film substrate.

 [0093] Further, as the transparent substrate, it is preferable that the surface on the side on which the colored layer, the color conversion layer and the like are formed has high smoothness. Specifically, it is preferable to use one having an average surface roughness (Ra) force of 0.5 nm to 3. Onm (5 μmO region).

 [0094] Specific examples of the synthetic resin constituting the transparent substrate include polycarbonate resin, polyarylate resin, polyethersulfone resin, acrylic resin such as methyl methacrylate resin, cellulose resin such as triacetyl cellulose resin, and epoxy resin. Or a cyclic olefin resin or a cyclic olefin copolymer resin.

 [0095] 4. Shading part

In this embodiment, a light shielding part (also referred to as a black matrix) may be formed between the colored layers on the transparent substrate. The light shielding portion is provided to partition the light emitting area for each pixel, prevent reflection of external light at the boundary between the light emitting areas, and enhance the contrast of images and videos. Therefore, the shading part is not necessarily provided. However, in addition to improving the contrast, it is preferable that the light shielding portion is formed when the colored layer or the like is formed corresponding to the opening of the light shielding portion. In addition, when an organic EL display device is formed using the color filter substrate for the organic EL element of the present embodiment, the light-shielding portion is formed because the light-emitting layer is formed corresponding to the opening of the light-shielding portion. I prefer to be there.

 [0096] The light shielding portion is usually formed in a black line shape, and is formed in a pattern shape having an opening portion such as a matrix shape or a stripe shape. When the organic EL display device is formed using the color filter substrate for the organic EL element of the present embodiment, light emitted from the light emitting layer reaches the observer side through the opening of the light shielding portion.

 [0097] The light shielding portion used in the present embodiment may be insulating or non-insulating, but it is preferable that it has insulating properties. If the light-shielding part has insulating properties, even when the organic EL display device using the organic EL element color filter substrate of this embodiment is used as an organic EL display device, the light-shielding part and the transparent electrode layer are in contact with each other. This is because it is possible to avoid conduction between the light shielding portion and the transparent electrode layer.

 [0098] Examples of the material for forming an insulating light shielding part include a resin composition containing a black colorant such as carbon black. Examples of the resin used in this resin composition include ionizing radiation curable resins having a reactive bur group such as attalylate, metatalylate, polyvinyl cinnamate, or cyclized rubber, particularly electron beam curable. Resin or UV curable resin can be used. In addition, for example, polymethyl methacrylate resin, polyacrylate resin, polycarbonate resin, polyvinyl alcohol resin, polybutylpyrrolidone resin, hydroxyethyl cellulose resin, carboxymethyl cellulose resin, polychlorinated bur resin, melamine resin, phenol resin, alkyd resin , Epoxy resin, polyurethane resin, polyester resin, maleic acid resin, polyamide resin, etc.

[0099] In addition, examples of the material for forming the light-shielding portion having no insulating property include metals such as chromium and metal oxides such as chromium oxide. In this case, the non-insulating light-shielding portion may be a CrO film (X is an arbitrary number) and two layers of Cr film laminated, or a CrO film with a further reduced reflectance. (X is an arbitrary number), CrN film (y is an arbitrary number) and Cr film force ¾ layer It may be laminated.

 [0100] As a method for forming a light-shielding part having insulating properties, a method of applying the above resin composition on a substrate and patterning it by a photolithography method can be used. Also, a printing method or the like can be used.

 [0101] Further, as a method for forming a non-insulating and light-shielding portion, a method of forming a thin film by an evaporation method, an ion plating method, a sputtering method, or the like, and patterning using a photolithography method is used. Can be used. Further, an electroless plating method or the like can also be used.

[0102] The film thickness of the light-shielding portion is about 0.2 xm to 0.4 xm when formed by vapor deposition, ion plating, sputtering, or the like. when due to is a ₅ μ m~2 μ about m 0..

 [0103] 5. Planarization layer

 In the present embodiment, a flat layer may be formed on the color conversion layer. This flat layer has a role of protecting the colored layer and the color conversion layer, and when the thickness of the colored layer and the color conversion layer is not constant, the surface of the layer is leveled to be a flat surface. When used in an organic EL display device, it is provided for the purpose of reducing the impact of forming a transparent electrode layer. In addition, if there is a step (unevenness) due to the structure of the colored layer or the color conversion layer, the flattening layer eliminates this step and flattens it, and forms the organic EL layer when manufacturing the organic EL display device. It has a flattening action to prevent occurrence of uneven thickness.

 [0104] A transparent resin can be used as a material for forming the flat layer used in the present embodiment. Specifically, photocurable resins and thermosetting resins having an acrylate or metatalylate reactive beer group can be used. In addition, as the above transparent resin, polymethylol methacrylate, polyacrylate, polycarbonate, polybutyl alcohol, polyvinyl pyrrolidone, hydroxyethyl cellulose, carboxymethyl cellulose, polyvinyl chloride resin, melamine resin, phenol resin, alkyd resin Epoxy resin, polyurethane resin, polyester resin, maleic acid resin, polyamide resin, etc. can be used

[0105] In addition, the flat layer in this embodiment may have light scattering properties. Since the flattening layer has light scattering properties, the light converted by the color conversion layer is horizontal to the transparent substrate. This is because leakage in the direction is suppressed, and light can be efficiently extracted in a direction perpendicular to the transparent substrate (observer side).

 [0106] In order to impart a light scattering function to the planarizing layer, the planarizing layer may contain light scattering fine particles. The light-scattering fine particles used in this embodiment are fine particles having a light scattering action. Preferred examples of the light-scattering fine particles include inorganic substances such as silicon oxide, aluminum oxide, and barium sulfate, acrylic resins, dibulebenzene resins, benzoguanamine resins, styrene resins, melamine resins, and acrylic-styrene resins. Examples of the organic fine particles such as polycarbonate resin, polyethylene resin, and polyvinyl chloride resin, and the like include a mixture of two or more of them. Among these, melamine resin, benzoguanamine resin, and mixed resin and copolymer fine particles are preferable in terms of transparency and durability.

 [0107] The average particle diameter of the light-scattering fine particles is preferably about 0.1 to 5 μm, more preferably 0 · 1 to 4.0 / im, and still more preferably 0. · :! to 2 · Ο μ ΐη. This is because a sufficient light scattering effect can be obtained when the average particle diameter is in the above range.

 [0108] The light-scattering fine particles are preferably spherical in order to increase the light scattering effect.

 [0109] As the method for forming the flattening layer, when the flattening layer-forming coating solution containing the transparent resin is a liquid, the film is applied by spin coating, roll coating, cast coating, or the like. In the case of a photo-curing resin, a method of thermosetting as necessary after irradiation with ultraviolet rays can be used. In addition, when the transparent resin described above is formed into a film, a flat layer can be formed directly or by sticking via an adhesive.

 [0110] The thickness of such a flat layer can be, for example, about:! To 7 am.

 [0111] 6. Gas barrier layer

In this embodiment, a gas barrier layer may be formed on the color conversion layer. For example, when the flat layer 5 is formed on the color conversion layer 3 as shown in FIG. 6, the gas barrier layer 6 is formed on the flat layer 5. When this gas barrier layer is used in an organic EL display device, water vapor, oxygen, or adsorption from the color filter substrate for the organic EL element is applied to the organic EL layer. It is provided to block the passage of desorbed gas from the color layer, color conversion layer, and the like.

 [0112] The gas barrier layer used in the present embodiment is not particularly limited as long as it can exhibit gas barrier properties against gas such as water vapor, oxygen, desorption gas, etc. For example, transparent inorganic A film, a transparent resin film, an organic-inorganic hybrid film, or the like is used. Among these, a transparent inorganic film is preferable because of its high gas barrier property.

 [0113] The material used for the transparent inorganic film is not particularly limited as long as it can exhibit gas barrier properties. For example, oxides such as aluminum oxide, silicon oxide, and magnesium oxide; Nitride such as nitride; nitrided oxide such as nitrided nitride oxide; Among these, nitrided silicon oxide is preferred because of its high gas noriality due to pinholes and protrusions.

 [0114] The gas barrier layer may be a single layer or multiple layers. For example, when the gas barrier layer is a multilayer in which a plurality of nitrided silicon oxide films are stacked, the gas barrier property can be further improved. When the gas barrier layer is a multilayer, different materials may be used for each layer.

 [0115] The thickness of the gas barrier layer is not particularly limited, and may vary depending on the type of material used for the gas barrier layer and whether the gas barrier layer is a single layer or a multilayer. Although it cannot be generally specified, it is generally about 20 nm to 2 β m for the entire gas barrier layer. This is because if the thickness of the gas barrier layer is too thin, the gas barrier properties may be insufficient, and if the thickness of the gas barrier layer is too thick, a phenomenon such as cracking due to the film stress of the thin film tends to occur.

[0116] When the gas barrier layer is a transparent inorganic film, the method for forming the transparent inorganic film is not particularly limited as long as it is a film forming method that can be formed in a vacuum state. Examples include a growth (CVD) method, an ion plating method, an electron beam (EB) evaporation method, a vacuum evaporation method such as a resistance heating method, and a laser ablation method. Of these, considering the productivity of the color filter substrate for the organic EL element, the sputtering method, the ion plating method, and the CVD method are preferable, and the use of the sputtering method is more preferable than the force S. High productivity and quality stability by using sputtering method This is because an excellent gas barrier layer can be formed.

[0117] 7. Manufacturing method of color filter substrate for organic EL device

 Hereinafter, an example of the manufacturing method of the color filter substrate for the organic EL element of this embodiment will be described.

 First, a black matrix is formed by depositing a metal such as chromium or a metal oxide such as chromium oxide on the entire surface of the transparent substrate and patterning it using a photolithography method. Next, on the transparent substrate on which the black matrix is formed, a coating solution for forming a red colored portion in which a red colorant is dispersed or dissolved in a binder resin is applied and patterned using a photolithography method. To form a red colored portion. A green colored portion and a blue colored portion are formed by the same procedure.

 Next, a green color conversion part is formed by applying a coating liquid for forming a green color conversion part in which a green conversion phosphor is dispersed or dissolved in a resin and patterning using a photolithography method. To do. At this time, the green color conversion part is formed in a pattern on the green coloring part.

 Then, if necessary, a flat layer is formed so as to cover the green color conversion portion and each coloring portion.

 In this way, a color filter substrate for an organic EL element can be produced.

[0118] II. Second Embodiment

 A second embodiment of the color filter substrate for an organic EL element of the present invention includes a transparent base material, a colored layer formed on the transparent base material in a pattern, and having a red colored portion, a green colored portion, and a blue colored portion. A color filter substrate for an organic EL element having a color conversion layer having at least a green color conversion part formed on the green color part, wherein the area of the green color conversion part is above the red color part The red color conversion portion formed on the blue color conversion portion and the blue color conversion portion formed on the blue coloring portion are larger in area than each other.

[0119] The color filter substrate for an organic EL device of the present embodiment will be described with reference to the drawings.

FIG. 7 is a schematic cross-sectional view showing an example of a color filter substrate for an organic EL element of the present embodiment. FIG. As shown in FIG. 7, in the color filter substrate 10 for the organic EL element of the present embodiment, the coloring composed of the red coloring portion 2R, the green coloring portion 2G, and the blue coloring portion 2B on the transparent substrate 1. From layer 2, red color conversion part 3R formed on red coloring part 2R, green color conversion part 3G formed on green coloring part 2G, and blue color conversion part 3B formed on blue coloring part 2B The color conversion layer 3 to be configured is sequentially formed, and a flat color layer 5 is formed so as to cover the color layer 2 and the color conversion layer 3. A black matrix 4 is formed between the colored portions 2R, 2G, and 2B of the colored layer 2. Further, the area of the green color conversion unit 3G is larger than the area of the blue color conversion unit 3B which is larger than the area of the red color conversion unit 3R.

[0120] When such a color filter substrate for an organic EL element is used in, for example, an organic EL display device having a white light emitting layer, a transparent electrode layer, a white light emitting layer, and a counter electrode layer are provided on the planarizing layer 5. Laminated sequentially. In general, white light emitted from a white light emitting layer is composed of red light and blue light, and the green light component is often small. When this white light passes through the colored layer, almost no green light is observed. In contrast, in the present embodiment, the area of the green color conversion unit 3G that converts incident light into green light is made larger than the area of each of the red color conversion unit 3R and the blue color conversion unit 3B. Ingredients can be increased. Therefore, by using the organic EL element color filter substrate of the present embodiment, it is possible to provide an organic EL display device that is excellent in the balance of the color characteristics of the three primary colors.

[0121] In the present embodiment, if the area of the green color conversion unit is larger than the areas of the red color conversion unit and the blue color conversion unit, the areas of the red color conversion unit and the blue color conversion unit are It is not particularly limited. Further, as described above, since the white light emitted from the white light emitting layer includes components of red light and blue light, in principle, the red color conversion unit and the blue color conversion unit do not need to perform color conversion. Therefore, the red color conversion part and the blue color conversion part may or may not be formed. For example, as shown in FIG. 7, when the red color conversion unit 3R and the blue color conversion unit 3B are formed, there is an advantage that the hues of red and blue can be adjusted. On the other hand, for example, as shown in FIG. 8, when the red color conversion unit and the blue color conversion unit are not formed, only the green color conversion unit 3G needs to be formed. For example photo This is advantageous in terms of cost because it is not necessary to repeat the patterning process using a lithography method or the like, and has the advantage that the manufacturing process is simple. In this embodiment, among the above, it is preferable that the red color conversion portion and the blue color conversion portion are not formed.

 [0122] When the red color conversion portion and the blue color conversion portion are not formed, for example, as shown in FIG. 8, the thickness dl of the red coloring portion 2R, and the combined thickness of the green coloring portion 2G and the green color conversion portion 3G Difference between d2 and thickness d3 of blue colored portion 2B h force 2. Oxm or less is preferable, more preferably 0.5 xm or less, and most preferably 0.2 zm or less. This is because if the difference in thickness is too large, a step (unevenness) due to the configuration of the colored layer and the color conversion layer becomes large, and it becomes difficult to flatten the surface. When an organic EL display device is produced using the organic EL element power filter substrate of this embodiment, a transparent electrode layer and an organic EL layer are formed on the surface of the color conversion layer. If the surface unevenness due to the composition of the color conversion layer is large, it may cause dark areas.

 [0123] In general, the thickness of the color conversion layer is larger than the thickness of the colored layer. In this embodiment, in order to make the difference in thickness within a predetermined range, for example, the thickness of the red colored portion and the blue colored portion may be increased, or the thickness of the green color converting portion may be decreased. Specifically, by reducing the concentration of the colorant in each colored portion, the thickness of the red colored portion and the blue colored portion can be increased, and the concentration of the green conversion phosphor in the green color converting portion can be increased. By increasing the thickness, the thickness of the green color conversion portion can be reduced. However, it is difficult to form a red coloring portion and a blue coloring portion that are too thick, and it is also difficult to form a green color conversion portion that is too thin. In particular, if the concentration of the green conversion phosphor in the green color conversion portion is too high in order to form a thin green color conversion portion, concentration quenching may occur.

 [0124] Therefore, the thickness dl of the red coloring portion 2R, the thickness d2 of the green coloring portion 2G and the green color conversion portion 3G, and the thickness d3 of the blue coloring portion 2B are also 1 111 to 3 111. It is preferably within the range of 1 111 to 2 111 and most preferably within the range of 1.2 μπι to 1.

Hereinafter, each configuration of the color filter substrate for an organic EL element of the present embodiment will be described. The transparent substrate and the light shielding part are the same as those described in the first embodiment. Since it is like, description here is abbreviate | omitted.

 [0126] 1. Color conversion layer

 The color conversion layer used in the present embodiment has at least a green color conversion part formed on the green coloring part. The area of the green color conversion portion is larger than the area of each of the red color conversion portion formed on the red coloring portion and the blue color conversion portion formed on the blue coloring portion. RU

 The area ratio of each color conversion unit is not particularly limited as long as the area of the green color conversion unit is larger than the areas of the red color conversion unit and the blue color conversion unit.

 [0128] Note that the "area" here refers to an area in a plane horizontal to the surface of the transparent substrate.

 Further, it can be confirmed by observation with an optical microscope or the like that the area of the green color conversion unit is larger than the areas of the red color conversion unit and the blue color conversion unit.

 In this embodiment, as described above, the red color conversion portion and the blue color conversion portion may be formed or may be formed or not.

 [0130] When the red color conversion portion and the blue color conversion portion are formed, for example, as shown in FIG. 7, the red color conversion portion 3R and the blue color conversion portion 3B are on the red color portion 2R and the blue color portion 2B. As a result, the area of the green color conversion unit can be made larger than the areas of the red color conversion unit and the blue color conversion unit. In this case, the formation position of the red color conversion part and the blue color conversion part is not particularly limited as long as it is a part on each coloring part. For example, the red color conversion part or the blue color conversion is provided at the center of each coloring part. A red color conversion portion or a blue color conversion portion may be formed on each colored portion, which may be formed with a portion.

 [0131] When the red color conversion portion and the blue color conversion portion are not formed, a transmission portion that transmits incident light may be formed on each colored portion. This transmissive part transmits red light when formed on the red colored part, and transmits blue light when formed on the blue colored part.

In this embodiment, for example, as shown in FIG. 9, a green color conversion unit 3G may be formed on the red coloring unit 2R. Most of the green light emitted from the green color conversion part 3G cannot pass through the red coloring part 2R, but the long wavelength component of the green light is red. This is because the red colored portion 2R can be transmitted as a component on the short wavelength side of light, and the hue can be adjusted.

 [0133] Therefore, on the red colored portion, both the red color conversion portion and the green color conversion portion may be formed, regardless of whether the red color conversion portion is formed or the green color conversion portion is formed. It is also possible that the red color conversion unit and the green color conversion unit have a misalignment or misalignment.

 [0134] The green color conversion section used in this embodiment is obtained by dispersing or dissolving a green conversion phosphor that absorbs incident light and emits green fluorescence.

 [0135] Specific examples of green-converting phosphors include 2, 3, 5, 6-1H, 4H-tetrahydro-8_trifluoromethylquinolizino (9, 9a, l_gh) coumarin, 3_ (2 ' _Benzothiazolyl) _ 7_ Jetylaminocoumarin, or 3_ (2 'Benzimidazolyl)-7-N, N-Jetyl Coumarin dyes such as aminocoumarin; Coumarin dyes such as Basic Yellow 51; Solvent Yellow 11, Or a naphthalimide dye such as Solvent Yellow 116; a fluorescent dye such as a ZnS phosphor such as ZnS: Tb; or a fluorescent pigment such as a yellow-green pigment (for example, F A005 (trade name) manufactured by Sinheroine Earth) Can do.

 [0136] In addition, the green color conversion phosphor is obtained by combining the above-mentioned fluorescent dye with, for example, polymethacrylic acid ester, polychlorinated butyl, chlorinated chloracetic acid butyl copolymer resin, alkyd resin, aromatic sulfonamide rosin, urea resin, melamine resin, A fluorescent pigment kneaded in advance in a benzoguanamine resin or a mixture of these resins may also be used.

 [0137] The above fluorescent dyes and fluorescent pigments may be used alone or in combination of two or more in order to adjust the hue of fluorescence.

 [0138] The resin used in the green color conversion section and the ratio of the resin in the green color conversion section and the green color conversion phosphor are the same as those described in the first embodiment. The description here is omitted.

[0139] The thickness of the green color conversion section can be set to about 1 μm to 10 xm. Among them, as described above, the thickness of the red colored portion, the thickness of the combined green colored portion and the green color converting portion, and the thickness of the blue colored portion are within a predetermined range. The thickness is such that the combined thickness of the green colored portion and the green color converting portion is within a predetermined range. It is preferable. Specifically, the force S, which varies depending on the thickness of the green coloring portion, and the thickness of the green color conversion portion is preferably in the range of 1.5 / im to 5 / im, more preferably 1.8 / It is in the range of im ~ 2.5 / im.

 [0140] In the case where the thickness of the green color conversion portion is set to be relatively thin in order to make the above-described thickness difference or the total thickness of the green color portion and the green color conversion portion within a predetermined range, for example, the green color By increasing the content of the green conversion phosphor in the conversion part, the thickness of the green color conversion part can be reduced without reducing the color conversion efficiency. However, if the content of the green conversion phosphor in the green color conversion part is too large, concentration quenching may occur. Therefore, when the content of the green color conversion phosphor in the green color conversion part is increased to reduce the thickness of the green color conversion part, the thickness is appropriately selected in consideration of concentration quenching.

 [0141] In this embodiment, when the red color conversion portion is formed, the red color conversion portion absorbs incident light and emits red fluorescence in the resin. Dispersed or dissolved.

 [0142] Specific examples of red-converting phosphors include 4-dicyanomethylene 2-methyl-6 (p-dimethylaminostyryl) 4H pyran and other cyanine dyes such as 1-ethyl-2- [4— (p— Dimethylaminophenyl) 1,3-Butagenyl] Pyridine dyes such as pyridinium park mouthrate; Rhodamine dyes such as rhodamine B or rhodamine 6G; Oxazine dyes; ZnS: Mn, ZnS: ZnS: Mn / ZnMgS, etc. Illustrative examples include fluorescent pigments such as phosphors, or fluorescent pigments such as orange pigments (for example, FA001 (trade name) manufactured by Sinhiroine Earth).

 [0143] In addition, the red-converted phosphor is obtained by combining the fluorescent dye with, for example, polymethacrylic acid ester, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer resin, alkyd resin, aromatic sulfonamide resin, urea resin, melamine resin, benzoguanamine. A fluorescent pigment kneaded in advance in a resin or a mixture of these resins may also be used.

 [0144] The fluorescent dyes and fluorescent pigments may be used alone or in combination of two or more in order to adjust the hue of fluorescence.

[0145] The resin used in the red color conversion unit is the same as the resin used in the green color conversion unit described above. Also, the ratio of the resin in the red color conversion part and the red conversion phosphor Is the same as in the case of the green color conversion unit.

 [0146] The red color conversion part and the blue color conversion part preferably have the same thickness as the green color conversion part.

 [0147] Further, when a transmissive part is formed, this transmissive part is formed on the red colored part, and in this case, it transmits red light, and is formed on the blue colored part. The case is not particularly limited as long as it transmits blue light. For example, it does not include a color conversion phosphor and can be made of the above-described resin.

 [0148] As a method for forming a color conversion layer, for example, each color conversion phosphor and resin are mixed with a solvent, a diluent or an appropriate additive as necessary to prepare each color conversion part forming coating solution. In addition, a method of patterning by a photolithography method using the coating solution for forming each color conversion portion, or a method for patterning by a printing method using the coating solution for forming each color conversion portion is used. .

 [0149] 2. Colored layer

 The colored layer used in this embodiment is formed in a pattern on a transparent substrate, and has a red colored portion, a green colored portion, and a blue colored portion.

[0150] As described above, the thickness of the red colored portion, the thickness of the combined green colored portion and the green color converting portion, and the thickness of the blue colored portion are within a predetermined range as described above. It is preferable that the thickness is such that the combined thickness of the green coloring portion and the green color conversion portion falls within a predetermined range. Specifically, although it varies depending on the thickness of the green color conversion portion, the thickness of the green coloring portion is preferably about 1 μm to 3 μm, more preferably 1 · 2 111 to 2/1 111 It is within the range, and most preferably within the range of 1.5 μΐη to 1.8 μm.

 [0151] The thicknesses of the red colored portion and the blue colored portion are as described above.

[0152] In order to set the difference in thickness and the thickness of each colored portion within a predetermined range, for example, the content of the colorant in each colored portion is adjusted.

[0153] Note that other aspects of the colored layer are the same as those described in the first embodiment, and thus the description thereof is omitted here.

[0154] 3. Planarization layer In this embodiment, a flattening layer is formed on the color conversion layer.

 Note that the material and method for forming the planarizing layer are the same as those described in the first embodiment, and a description thereof will be omitted here.

 The thickness of the flat layer can be, for example, about:! To 5 μm.

[0155] 4. Gas barrier layer

 In this embodiment, a gas barrier layer is formed on the color conversion layer. The thickness of the gas barrier layer is not particularly limited, and differs depending on the type of material used for the gas barrier layer and whether the gas barrier layer is a single layer or a multilayer. However, it is usually about 50 nm to 2 μm for the entire gas barrier layer. This is because if the thickness of the gas barrier layer is too thin, the gas barrier property may be insufficient, and if the thickness of the gas barrier layer is too thick, a phenomenon such as a crack due to the film stress of the thin film is likely to occur.

 [0156] The other points of the gas barrier layer are the same as those described in the first embodiment, and a description thereof will be omitted here.

[0157] 5. Manufacturing method of color filter substrate for organic EL element

 Hereinafter, an example of the manufacturing method of the color filter substrate for the organic EL element of this embodiment will be described.

 First, a black matrix is formed by depositing a metal such as chromium or a metal oxide such as chromium oxide on the entire surface of a transparent substrate and patterning it using a photolithography method. Next, on the transparent substrate on which the black matrix is formed, a coating solution for forming a red colored portion in which a red colorant is dispersed or dissolved in a binder resin is applied and patterned using a photolithography method. To form a red colored portion. A green colored portion and a blue colored portion are formed by the same procedure. At this time, each colored portion is formed so that its thickness falls within a predetermined range.

Next, a green color conversion part is formed by applying a coating liquid for forming a green color conversion part in which a green conversion phosphor is dispersed or dissolved in a resin and patterning using a photolithography method. To do. At this time, the green color conversion portion has a predetermined thickness of the red color portion, a thickness of the green color portion and the green color conversion portion, and a thickness of the blue color portion. It forms so that it may become a range.

 Then, if necessary, a flat layer is formed so as to cover the green color conversion portion and each coloring portion.

 In this way, a color filter substrate for an organic EL element can be produced.

 [0158] B. Organic EL display

 Next, the organic EL display device of the present invention will be described. The organic EL display device of the present invention includes the above-described organic EL element color filter substrate, the transparent electrode layer formed on the color conversion layer side surface of the organic EL element color filter substrate, and the transparent electrode layer. And an organic EL layer including at least a light emitting layer and a counter electrode layer formed on the organic EL layer.

 [0159] Since the organic EL display device of the present invention uses the above-described color filter substrate for organic EL elements, light scattered and leaked in the color conversion layer can be efficiently extracted, and luminance can be improved. Is possible.

 FIG. 6 is a schematic cross-sectional view showing an example of the organic EL display device of the present invention. In FIG. 6, the color filter substrate 10 for an organic EL element is formed on a transparent substrate 1, a colored layer composed of colored portions 2R, 2G, and 2B of the three primary colors and a green color formed on the green colored portion 2G. A color conversion layer having a conversion portion 3G is formed, a light shielding portion 4 is formed between the coloring portions 2R, 2G, and 2B, and a flat layer 5 is formed so as to cover the coloring layer and the color conversion layer. The gas barrier layer 6 is formed thereon. Further, on the red colored portion 2R and the blue colored portion 2B, there are formed transmitting portions 3 and for transmitting incident light, respectively. In the organic EL display device 20 of the present invention, the transparent electrode layer 11, the organic EL layer 12 including the light emitting layer, and the counter electrode layer 13 are formed on the gas barrier layer 6 of the color filter substrate 10 for the organic EL element. An insulating layer 14 is formed between the transparent electrode layers 11 on the gas barrier layer 6, and a partition wall portion (forced sword separator) 15 is formed thereon.

FIG. 10 is a schematic sectional view showing another example of the organic EL display device of the present invention. In FIG. 10, the color filter substrate 10 for the organic EL element includes a colored layer having three primary colored portions 2R, 2G, and 2B on a transparent substrate 1, and a green color converting portion 3G corresponding to the green colored portion 2G. A color conversion layer having a light shielding portion 4 is formed between the colored portions 2R, 2G, and 2B. A flat layer 5 is formed so as to cover the coloring layer and the color conversion layer, and a gas barrier layer 6 is formed thereon. In the organic EL display device 20 of the present invention, the transparent electrode layer 11, the organic EL layer 12 including the white light emitting layer, and the counter electrode layer 13 are provided on the gas barrier layer 6 of the color filter substrate 10 for the organic EL element. The insulating layer 14 is formed between the transparent electrode layers 11 on the gas barrier layer 6, and the partition wall portion (forced sword separator) 15 is formed thereon.

 [0162] When the organic EL display device of the present invention has a white light emitting layer that emits white light, for example, as shown in FIG. A green display can be obtained and the luminance of green light can be improved. In this case, for example, as shown in FIG. 10, the green light component can be increased by making the area of the green color conversion unit larger than the areas of the red color conversion unit and the blue color conversion unit. Therefore, the organic EL display device of the present invention uses the above-described color filter substrate for the organic EL element even when it has a white light emitting layer that emits white light, and therefore has an excellent balance of the color characteristics of the three primary colors. Have advantages.

 Hereinafter, each configuration of the organic EL display device of the present invention will be described.

 [0163] 1. Organic EL layer

 The organic EL layer used in the present invention is composed of one or more organic layers including at least a light emitting layer. That is, the organic EL layer is a layer including at least a light-emitting layer, and the layer structure is a layer having one or more organic layers. Normally, when an organic EL layer is formed by a wet method by coating, it is often difficult to stack a large number of layers in relation to the solvent, so it is often formed with one or two organic layers. However, it is possible to further increase the number of layers by devising organic materials so that their solubility in solvents is different or by combining vacuum deposition methods.

[0164] Examples of the organic layer formed in the organic EL layer other than the light emitting layer include a charge injection layer such as a hole injection layer and an electron injection layer. In addition, examples of other organic layers include a charge transport layer such as a hole transport layer that transports holes to the light-emitting layer and an electron transport layer that transports electrons to the light-emitting layer. In many cases, the layer is formed integrally with the charge injection layer by imparting a charge transport function to the layer. Other, As an organic layer formed in the organic EL layer, it prevents holes or electrons from penetrating like the carrier block layer, and further prevents diffusion of excitons and confines excitons in the light emitting layer. Examples include a layer for increasing the recombination efficiency.

 Hereinafter, each configuration of the organic EL layer will be described.

 [0165] (1) Light emitting layer

 The light emitting layer used in the present invention has a function of emitting light by providing a recombination field between electrons and holes. The light emitting layer may be a white light emitting layer that emits white light or a blue light emitting layer that emits blue light.

 [0166] The blue light emitting layer usually contains a blue light emitting material that emits blue light. A general thing can be used as a blue light-emitting body. For example, SrGa S: Ce, CaGa S: Ce, B, which are disclosed in JP-A-7-122364 and JP-A-8-134440.

 2 4 2 4 aAl S ： Blue color with excellent color purity of thiogalade or thioaluminate such as Eu

twenty four

 A light body is preferably used. Specific examples of the blue luminescent material include fluorescent whitening agents such as benzothiazole, benzimidazole, and benzoxazole exemplified in JP-A-8-279394, JP-A-63-295695. Metal chelate dioxinoid compounds disclosed in Japanese Laid-Open Patent Publications, styrylbenzene compounds disclosed in European Patent No. 0319881 and European Patent No. 0373582, Japanese Patent Laid-Open No. 2-252793 Examples thereof include the distyrylvirazine derivatives that have been disclosed, or the aromatic dimethylidin compounds disclosed in Japanese Patent Application Laid-Open No. 3-231970.

[0167] Examples of the benzothiazole fluorescent whitening agent include 2-2 '-(p-phenylene divinylene) monobisbenzothiazole. Examples of the benzoimidazole-based fluorescent brightener include 2_ [2- [4 -— (2-benzimidazolyl) phenyl] bulu] benzimidazole or 2_ [2- (4-carboxyphenyl) bulu] benzimidazole. Sol and the like. Examples of the above-mentioned benzoxazole-based optical brightener include 2,5_bis (5,7_di-tert-pentyl_2_benzoxazolyl) _1,3,4-thiadiazole, 4,4 '_Bis (5,7_t-pentyl_2_benzoxazolyl) stilbene or 2_ [2_ (4-cyclophenyl) bulu] naphtho [1,2_d] oxazole It is done.

 [0168] Further, examples of the metal chelate oxinoid compound include 8- (triquinone) -tris (8-quinolinol) aluminum, bis (8-quinolinol) magnesium, bis (benzo [f] -8-quinolinol) zinc, etc. Examples thereof include hydroxyquinoline metal complexes and dilithium pintridione. Examples of the styrylbenzene compounds include 1,4_bis (2-methylstyryl) benzene, 1,4_bis (3-methylstyryl) benzene, 1,4_bis (4-methylstyryl) benzene, and distyryl. Benzene, 1,4_bis (2-ethylstyryl) benzene, 1,4_bis (3-ethylstyryl) benzene, 1,4_bis (2 methylstyryl) 1-2 methylbenzene, or 1,4_bis (2 Methyl styryl) _ 2_ethylbenzene and the like.

 [0169] Furthermore, examples of the distyrylvirazine derivative include 2,5_bis (4 methylstyryl) pyrazine, 2,5_bis (4-ethylylstyryl) pyrazine, 2,5_bis [2- (1— Naphthyl)) bier] pyrazine, 2,5 bis (4-methoxystyryl) pyrazine, 2,5 bis [2- (4-biphenyl) vinyl] pyrazine, or 2,5-bis [2- (1-pyrenyl) Vinyl] pyrazine and the like, or derivatives thereof. Examples of the aromatic dimethylidin compounds include 1,4 phenylene range methylidin, 4,4 phenylene range methylidin, 2 methylidin, 1,4-p-terephedylene range methylidin, 9,10-anthracene. Gilles Noremelidin, 4,4'-bis (2,2-di-tert-butylphenylvinyl) biphenyl, or 4,4'-bis (2,2diphenylvinyl) biphenyl, etc., or their derivatives Can be illustrated.

 [0170] Specific examples of the blue luminescent material include compounds represented by the general formula (Rs_Q) -AL-0-L disclosed in JP-A-5-258862. here,

 2

In the general formula, L is a hydrocarbon having 6 to 24 carbon atoms including a benzene ring, _L is a phenolate ligand, Q is a substituted 8 _quinolinolato ligand, Rs is aluminum Represents an 8_quinolinolato ring substituent selected so as to sterically hinder the binding of two or more substituted 8-quinolinolato ligands to the atom. Specifically, bis (2 methylolene _ 8 _ quinolinolate) (para-phenol phenolate) aluminum (111) or bis (2-methyl Examples thereof include 8-quinolinolato) (1 naphtholato) aluminum (III) and the like.

[0171] Further, white light emission by the white light emitting layer can be obtained by superimposing light emitted from a plurality of light emitters. The white light-emitting layer in the present invention may be one that obtains white light emission by superimposing two-color light emission of two kinds of light emitters having a predetermined fluorescence peak wavelength, and three kinds of light emission layers having a predetermined fluorescence peak wavelength. You can also obtain white light emission by superimposing the three-color light emission of the illuminant. Especially, it is preferable that a white light emitting layer shows white light emission with few green light components. For example, by forming the green color conversion part partially on the green coloring part, a good green display can be obtained and the brightness of the green light can be improved, so that the balance of the color characteristics of the three primary colors is excellent. This is because it can be an organic EL display device.

[0172] In the present invention, the white light emitting layer emits white light by a so-called two-wavelength light source that obtains white light emission by superimposing two-color light emission of two kinds of light emitters having a predetermined fluorescence peak wavelength. It is preferable. In particular, the white light emitting layer preferably contains a blue light emitter and a small amount of a red light emitter and emits white light from a two-wavelength light source. The white light emission obtained by such a white light emitting layer contains almost no green light component. However, as described above, for example, by forming the green color conversion part partially on the green coloration part, the white light emission can be improved. This is because a green display can be obtained and the brightness of green light can be improved, so that an organic EL display device having an excellent balance of the color characteristics of the three primary colors can be obtained.

 Note that the “two-wavelength light source” here includes a case where the main light emission power is not the only two-wavelength light emission but the main light emission power.

 [0173] The blue phosphor used for the white light-emitting layer preferably has a fluorescence peak wavelength of 380 nm or more and less than 480 nm, more preferably 420 nm or more and less than 475 nm. As such a blue light emitter, among the compounds described in, for example, JP-A-3-231970, International Publication No. WO92Z0 5131 or JP-A-7-26254, the above-described fluorescence condition is satisfied. Things. Specific examples include the compounds described in JP-A-6-207170.

[0174] The red phosphor used for the white light-emitting layer has a fluorescence peak wavelength of 575 nm or more. More preferably, it is 580 nm or more and 620 nm or less. Examples of such red light emitters include dicyanomethylenepyran derivatives, dicyanomethylenethiopyran derivatives, fluorescein derivatives, and perylene derivatives that are used as red starting laser dyes described in European Patent Publication No. 0281381. Can be mentioned. The content of the red light emitter is set in a range in which concentration quenching does not occur.

[0175] The thickness of the light emitting layer is not particularly limited, but can be, for example, about 5 nm to 5 μm, and preferably about 5 nm to l z m.

[0176] The method for forming the light emitting layer is not particularly limited as long as it is a method capable of high-definition patterning. For example, vapor deposition, printing, inkjet, or spin coating, casting, dating, bar coating, blade coating, roll coating, gravure coating, flexographic printing, spray coating, and self-organization And the like (alternate adsorption method, self-assembled monolayer method) and the like. Among them, it is preferable to use a vapor deposition method, a spin coat method, and an ink jet method. Further, when patterning the light emitting layer, coating or vapor deposition may be performed by a masking method, or a partition may be formed between the light emitting layers.

 [0177] (2) Hole injection layer

 In the present invention, a hole injection layer may be formed between the light emitting layer and the anode (transparent electrode layer or counter electrode layer). This is because by providing the hole injection layer, the injection of holes into the light emitting layer is stabilized and the light emission efficiency can be increased.

 [0178] As a constituent material of the hole injection layer used in the present invention, a material generally used for a hole injection layer of an organic EL element can be used. The constituent material of the hole injection layer may be any material that has either a hole injection property or an electron barrier property, and may be an organic material or an inorganic material.

[0179] Specifically, the constituent material of the hole injection layer includes a triazole derivative, an oxadiazole derivative, an imidazole derivative, a polyarylalkane derivative, a pyrazoline derivative, a pyrazolone derivative, a phenylenediamine derivative, an arylamine derivative, and an amino substitution. Chalcone derivatives, oxazole derivatives, styryl anthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives, silazane derivatives, polysilanes, aniline copolymers Alternatively, conductive polymer oligomers such as thiophene oligomers can be exemplified. Furthermore, examples of the constituent material of the hole injection layer include borphyrin compounds, aromatic tertiary amine compounds, and styrylamine compounds.

 [0180] Examples of the porphyrin compound include porphine, 1, 10, 15, 20-tetraphenyl 2-nitrone 21H, 23H-porphine copper (Π), aluminum phthalocyanine lipide, or copper otamethyl phthalocyanine. .

 [0181] Examples of the aromatic tertiary amine compound include N, N, Ν ', N'-tetraphenyl bis-nore-1,4'-diaminophenyl, Ν, Ν'-diphenyl Ν, Ν'- Bis-one (3-methylphenol) [1, 1'-biphenyl] — 4, 4'-diamin, 4— (di-ρ-trinoleamino) -one 4′— [4 (di-ρ —Tolylamino) styryl] stilbene, 3-methoxy-l 4 '_Ν, Ν_diph ヱ ninore aminostilbenzene, 4, 4'-bis [Ν- (1-naphthyl) lΝ-phenylamino] biph enore, or 4, 4 ', 4' '-tris [Ν- (3-methylphenyl) _Ν_phenylamino] triphenylamine and the like.

 [0182] The thickness of such a hole injection layer is not particularly limited, but can be, for example, about 5ηm to 5μΐη, and particularly about 5nm to 0.5 / im. It is preferable to do.

 [0183] (3) Electron injection layer

 In the present invention, an electron injection layer may be formed between the light emitting layer and the cathode (transparent electrode layer or counter electrode layer). This is because by providing the electron injection layer, the injection of electrons into the light emitting layer is stabilized, and the light emission efficiency can be increased.

[0184] Examples of the constituent material of the electron injection layer used in the present invention include heterocyclic tetracarboxylic anhydrides such as nitro-substituted fluorene derivatives, anthraquinodimethane derivatives, diphenylquinone derivatives, thiopyran dioxide derivatives, naphthalene perylene, and the like. Known as electron-withdrawing groups, thiazole derivatives in which the oxygen atom of the oxadiazole ring of the oxadiazole ring is substituted with a thioadiene, carbodiimide, fluorenylidenemethane derivatives, anthraquinodimethane and anthrone derivatives, oxadiazole derivatives, Illustrate quinoxaline derivatives having a quinoxaline ring, metal complexes of 8-quinolinol derivatives such as tris (8-quinolinol) aluminum, phthalocyanines, metal phthalocyanines, or distyrylvirazine derivatives. It can be. [0185] The thickness of the electron injection layer is not particularly limited, and can be, for example, about 5 nm to 5 / im, and preferably about 5 nm to 0.5 / im. .

 [0186] 2. Transparent electrode layer

 The transparent electrode layer used in the present invention is for applying voltage to the organic EL layer sandwiched between the counter electrode layer and causing light emission at a predetermined position. This transparent electrode layer is formed on the color conversion layer side surface of the above-described organic EL element color filter substrate. For example, as shown in FIG. 6 and FIG. It is formed in a stripe shape having a width corresponding to the width of the opening. In this case, the pitch of the striped transparent electrode layer 11 is the same as the pitch of the openings of the light shielding portion 4.

 [0187] The transparent electrode layer in the present invention is usually composed of a metal oxide thin film having transparency and conductivity. Examples of such metal oxides include indium tin oxide (ITO), indium oxide, zinc oxide, and stannic oxide.

 [0188] As a method for forming such a transparent electrode layer, for example, a method of forming a metal oxide thin film by a vapor deposition method or a sputtering method and then patterning by a photolithography method is preferably used.

 [0189] 3. Counter electrode layer

 The counter electrode layer used in the present invention constitutes the other electrode for causing the organic EL layer to emit light, and is an electrode having a charge opposite to that of the transparent electrode layer. This counter electrode layer is formed on the organic EL layer.

 [0190] The counter electrode layer in the present invention is usually composed of a metal, a alloy, or a mixture thereof having a work function as small as about 4 eV or less. Specifically, sodium, sodium potassium alloy, magnesium, lithium, magnesium / copper mixture, magnesium / silver mixture, magnesium / aluminum mixture, magnesium Z indium mixture, aluminum / aluminum oxide (Al 2 O 3) mixture , Indium or lithium / aluminum

 twenty three

 A mixture, a rare earth metal, etc. can be illustrated. More preferably, a magnesium / silver mixture, a magnesium / aluminum mixture, a magnesium Z indium mixture, an aluminum Z aluminum oxide (Al 2 O 3) mixture, or a lithium / aluminum mixture.

 twenty three

You can't give up. [0191] The counter electrode layer preferably has a sheet resistance of several hundred Ω / cm or less.

 The thickness of the counter electrode layer is preferably about 10 nm to l μΐη, more preferably 5

It is about 0 to 200 nm.

[0192] As a method for forming such a counter electrode layer, a method of forming a thin film by a vapor deposition method or a sputtering method and then patterning by a photolithography method is preferably used.

[0193] 4. Other

 In the present invention, an insulating layer may be formed between the striped transparent electrode layers so as to correspond to the light shielding portion.

[0194] In addition, a partition wall functioning as a mask for forming a light emitting layer or the like may be formed on the insulating layer. As a material for forming the partition wall, for example, a photocurable resin such as a photosensitive polyimide resin or an acrylic resin, a thermosetting resin, or an inorganic material can be used. In this case, you may perform the process which changes the surface energy (wetting property) of a partition part.

 [0195] The driving method of the organic EL display device of the present invention may be a shift or shift of a noisy matrix or an active matrix.

[0196] The present invention is not limited to the above embodiment. The above-described embodiment is an example, and has substantially the same configuration as the technical idea described in the claims of the present invention, and the one that exhibits the same function and effect is a good one. However, it is included in the technical scope of the present invention.

 Example

 Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples.

 [Example 1]

 (Formation of black matrix)

As a transparent base material, 150 mm × 150 mm, 0.7 mm thick soda glass (manufactured by Central Glass Co., Ltd.) was prepared. A thin film (thickness 0.2 μΐη) of oxynitride composite chromium was formed on the entire surface of one side of the transparent substrate by sputtering. A photosensitive resist is applied onto the composite oxynitride thin film, mask exposure, development, and etching of the composite oxynitride thin film In order to form a black matrix, rectangular openings of 80 / im X 280 / im are arranged in a matrix with a pitch of 100 μm in the short side direction and a pitch of 300 μm in the long side direction. did.

 [0198] (Formation of colored layer)

 A coating solution for forming colored portions of red, green and blue was prepared. Condensed azo pigments (manufactured by Chinoku 'Specialty' Chemicals, Chromophthal Red BRN) as red colorants, phthalocyanine green pigments (Lionol Green 2Y—301, manufactured by Toyo Ink Co., Ltd.) as green colorants As the blue colorant, anthraquinone pigments (Ciba 'Special Chemicals, Chromophthal Blue A3R) were used. In addition, polybulu alcohol (10% aqueous solution) was used as the binder resin. Each colorant was blended at a ratio of 1 part by weight with respect to 10 parts by weight of the polybula alcohol aqueous solution, and sufficiently mixed and dispersed. Further, 1 part by weight of ammonium dichromate was added as a cross-linking agent to 100 parts by weight of the obtained solution to obtain each colored portion forming coating solution.

 [0199] Each colored portion was formed using the above-described coating liquid for forming colored portions. That is, on the transparent base material on which the black matrix was formed, a red colored portion forming coating solution was applied by a spin coating method and pre-baked at 100 ° C. for 5 minutes. Then, it exposed using the photomask and developed with the developing solution (0.05% KOH aqueous solution). Next, post-bake for 60 minutes at 200 ° C was performed, synchronized with the pattern of the black matrix, and a striped red colored part with a width of 85 / im and a thickness of 1.5 / im, with the width direction being black It was formed so as to be in the short side direction of the opening of the matrix. Thereafter, the green colored portion forming coating solution and the blue colored portion forming coating solution were sequentially used to form striped green colored portions and blue colored portions. Thereby, a colored layer in which the colored portions of the three primary colors were repeatedly arranged in the width direction was formed.

 [0200] (Formation of color conversion layer)

A coating solution for forming the transmission area (transparent photosensitive resin composition, product name: Color Mosaic CB-701, manufactured by Fuji Hunt Electronics Technology Co., Ltd.) is spin-coated on the black matrix and colored layer. Apply by 100. Pre-bake for 5 minutes at C. Next, after patterning by photolithography, post baking was performed at 200 ° C. for 60 minutes. This gives a width of 85 xm and a thickness of 2 on the blue and red colored areas. Each of the 5 _β m stripe-shaped transmission portions was formed.

 [0201] Next, an alkali-soluble negative photosensitive resist in which a green conversion phosphor (manufactured by Aldrich Co., Ltd., dispersed) was dispersed was used as a conversion green color portion forming coating solution. FIG. 1 1 (as shown, the green colored tone (this, width 10 zm, gap 5 μm, thickness 2.5 μm) was formed as a striped green color conversion part 3G.

 [0202] (Formation of planarization layer)

 Next, a flattening layer forming coating solution was prepared by diluting an acrylate-based photocurable resin (manufactured by Nippon Steel Chemical Co., Ltd., trade name: V-259PA / PH5) with propylene glycol monomethyl ether acetate, This flat layer forming coating solution is applied by spin coating on the color conversion layer, pre-baked at 120 ° C for 5 minutes, and then irradiated with ultraviolet rays to a dose of 300 mJ. After exposure, post-bake at 200 ° C for 60 minutes to form a transparent flattening layer with a thickness of 2 μm to cover the entire colored layer and color conversion layer. Formed.

 [0203] (Formation of transparent electrode layer)

 Next, an indium tin oxide (ITO) electrode film having a thickness of 150 nm is formed on the planarizing layer by ion plating, a photosensitive resist is applied on the ITO electrode film, mask exposure, development, and ITO electrode film are applied. Etching was performed to form a transparent electrode layer. This transparent electrode layer is a striped pattern with a width of 80 / m formed so as to run on the flat substrate layer from the transparent substrate, and is positioned on each colored portion of the colored layer on the color conversion layer. It was something to do.

 [0204] (Formation of insulating layer and partition wall)

After applying an insulating layer forming coating solution diluted with toluene with a norbornene resin (JSR Co., Ltd., ARTON) with an average molecular weight of approximately 100000, it is applied so as to cover the transparent electrode layer by spin coating. Then, an insulating film (thickness 1 μm) was formed by performing beta (100 ° C., 30 minutes). Next, a photosensitive resist was applied on the insulating film, mask exposure, development, and etching of the insulating film were performed to form an insulating layer. This insulating layer is arranged so that the opening of the insulating layer is located in the opening of the black matrix, and the opening of the insulating layer is 90 μm X 290 μm larger than the opening of the black matrix. The shape was rectangular. [0205] Next, partition wall coating (manufactured by Nippon Zeon Co., Ltd., photoresist, ZPN1100) was applied over the entire surface to cover the insulating layer by spin coating, and pre-beta (70 ° C, 30 minutes) was performed. It was. After that, it is exposed using a predetermined photomask, developed with a developer (ZTMA-100, manufactured by Nippon Zeon Co., Ltd.), and then post-beta (100 ° C, 30 minutes). went. As a result, a partition wall was formed on the insulating layer. The partition wall had a shape with a height of 10 zm, a lower part (insulating layer side) width of 15 μm, and an upper part width of 26 μm.

 [0206] (Formation of white organic EL layer)

 Next, an organic EL layer composed of a hole injection layer and a white light emitting layer was formed by vacuum vapor deposition using the partition wall as a mask.

 That is, first, N, Ν'-diphenyl 1 Ν, ビ ス '-bis (3-methylphenyl) 1 [1, Γ-biphenyl] 1, 4'-diamin is used as an opening corresponding to the image display area. The film is formed by vapor deposition up to 60 nm through a photomask equipped with a mask, and the partition walls become a mask pattern. The material for forming the hole injection layer passes only between the partition walls and is positively formed on the transparent electrode layer. A hole injection layer was formed.

 Similarly, 4,4′-bis (2,2, -divinylvinyl) biphenyl (fluorescence peak wavelength: 465 nm (solid)) was deposited to 40 nm to form a film. At the same time, a small amount of rubrene (manufactured by Aldrich Co., Ltd., fluorescence peak wavelength: 585 nm (dimethylformamide 0.1 wt% solution)) was contained. This formed the white light emitting layer.

 Thereafter, tris (8-quinolinol) aluminum was deposited to a thickness of 20 nm to form an electron injection layer. The organic EL layer thus formed was present between the partition walls as a stripe-like pattern having a width of 280 μΐη.

[0207] (Formation of counter electrode layer)

Next, magnesium and silver are simultaneously vapor-deposited by vacuum vapor deposition (magnesium vapor deposition rate) on the area where the partition wall is formed through a photomask having a predetermined opening wider than the image display area. = 1. 3 ~: 1. 4 nm / second, silver deposition rate = 0. InmZ second). As a result, a partition electrode portion was used as a mask to form a 200-nm-thick counter electrode layer made of magnesium Z-silver compound on the organic EL layer. This counter electrode layer was present on the white organic EL layer as a stripe pattern having a width of 280 zm. Thus, an organic EL display device was produced.

[0208] [Comparative Example 1]

 An organic EL display device was produced in the same manner as in Example 1 except that the color conversion layer was not formed in Example 1.

[0209] [Evaluation]

A transparent electrode layer is obtained by applying a voltage of DC 8.5 V to the transparent electrode layer and the counter electrode layer of the organic EL display device of Example 1 and Comparative Example 1 at a constant current density of 10 mA / cm ² and continuously driving the transparent electrode layer. The white light emitting layer at a desired portion where the counter electrode layer and the counter electrode layer intersect was caused to emit light. CIE chromaticity coordinates (JIS Z 8701) for the emission of each color observed on the opposite side of the transparent substrate after color conversion in the color conversion layer or transmission as it is and color correction in the colored layer. Was measured. As a result, in the organic EL display device of Comparative Example 1, green emission of x = 0.264 and y = 0.534 was confirmed in the CIE chromaticity coordinates, whereas in the organic EL display device of Example 1, CIE Green emission of x = 0.291 and y = 0.564 was confirmed in chromaticity coordinates. Further, comparing the luminance of green light emission, the luminance of the organic EL display device of Example 1 was improved by 5% as compared with the organic EL display device of Comparative Example 1. Thus, the organic EL display device of Example 1 was capable of displaying three primary colors with high brightness and high color purity.

[0210] [Example 2]

 In Example 1, an organic EL display device was produced in the same manner as in Example 1 except that a colored layer was formed as shown below.

 (Formation of colored layer)

A coating solution for forming colored portions of red, green and blue was prepared. Condensed azo pigments (manufactured by Chinoku 'Specialty' Chemicals, Chromophthal Red BRN) as red colorants, phthalocyanine green pigments (Lionol Green 2Y—301, manufactured by Toyo Ink Co., Ltd.) as green colorants As the blue colorant, anthraquinone pigments (Ciba 'Special Chemicals, Chromophthal Blue A3R) were used. As binder resin, acrylic UV curable resin composition (acrylic UV curable resin 20% · acrylic UV curable resin monomer 20% · additive 5% · propylene glycol monomethyl ether acetate (PGMEA) 55 %) Was used. Acrylic UV curable resin composition Each colorant was blended at a ratio of 1 part (all parts are based on mass) to 10 parts of the product and sufficiently mixed and dispersed to obtain a coating solution for forming colored parts.

[0211] Each colored portion was formed using the above-described coating liquid for forming colored portions. That is, on the transparent base material on which the above black matrix was formed, the red colored portion forming coating solution was applied by a spin coating method, and pre-baked at 120 ° C. for 2 minutes. Then, exposure using a photomask (accumulated exposure 300MjZcm ^2), was present image with a developer solution _(0. 05./ ο Kappa_〇_Ita solution). Next, post-bake for 60 minutes at 230 ° C was performed, and synchronized with the black matrix pattern. Striped red colored parts with a width of 85 xm and a thickness of 1.5 xm, with the width direction being black. It formed so that it might become the short side direction of the opening part of a matrix. Thereafter, the green colored portion forming coating solution and the blue colored portion forming coating solution were sequentially used to form striped green colored portions and blue colored portions. As a result, a colored layer in which the colored portions of the three primary colors were repeatedly arranged in the width direction was formed.

 [0212] (Evaluation)

 Similar to the organic EL display device of Example 1, the organic EL display device of Example 2 was capable of high brightness, high color purity, and display of three primary colors.

[0213] [Example 3]

 (Formation of black matrix)

 As a transparent substrate, soda glass (manufactured by Central Glass Co., Ltd.) having a thickness of 370 mm × 470 mm and a thickness of 0.7 mm was prepared. On this transparent substrate, a thin film (thickness 0.2 μΐη) of oxynitride composite chromium was formed by sputtering. A photosensitive resist is applied onto this oxynitride composite chrome thin film, mask exposure, development, and etching of the oxynitride composite chrome thin film are sequentially performed, and a rectangular opening of 80 μm X 280 μm becomes short. A black matrix arranged in a matrix with a pitch of 100 μm in the side direction and a pitch of 300 xm in the long side direction was formed.

[0214] (Formation of colored layer)

A coating solution for forming colored portions of red, green and blue was prepared. Condensed azo pigments (manufactured by Chinoku 'Specialty' Chemicals, Chromophthal Red BRN) as red colorants, phthalocyanine green pigments (Lionol Darin 2Y-301, manufactured by Toyo Ink Co., Ltd.), And anthraquinone pigments (Ciba's Speciale) Ti's Chemikanorezu, chromophthal blue A3R) was used. In addition, as binder resin, as binder resin, acrylic UV curable resin composition (acrylic UV curable resin 20%, acrylic UV curable resin monomer 20%, additive 5%, propylene glycol monomethyl ether Acetate (PGMEA) 55%) was used. Each colorant is blended at a ratio of 1 part (all parts are based on mass) to 10 parts of the acrylic UV curable resin composition, and thoroughly mixed and dispersed. Got.

[0215] Each colored portion was formed using the above-described coating liquid for forming colored portions. That is, on the transparent base material on which the above black matrix was formed, the red colored portion forming coating solution was applied by a spin coating method, and pre-baked at 120 ° C. for 2 minutes. Then, exposure using a photomask (accumulated exposure 300MjZcm ^2), was present image with a developer solution _(0. 05./ ο Kappa_〇_Ita solution). Next, post-bake for 60 minutes at 230 ° C was performed, and synchronized with the black matrix pattern. Striped red colored parts with a width of 85 xm and a thickness of 1.5 xm, with the width direction being black. It formed so that it might become the short side direction of the opening part of a matrix. Thereafter, a green colored portion forming coating solution and a blue colored portion forming coating solution are sequentially used to obtain a stripe-shaped green colored portion having a width of 85 / m and a thickness of 1.6 / im, and a width of 85 / im and a thickness. A striped blue colored part of 1 · 6 μΐη was formed. As a result, a colored layer in which the colored portions of the three primary colors were repeatedly arranged in the width direction was formed.

 [0216] (Formation of color conversion layer)

 An alkali-soluble negative photosensitive resist in which a green conversion phosphor (manufactured by Aldrich, Coumarin 6) is dispersed is used as a coating solution for forming a green color conversion part, and this coating solution for forming a green color conversion part is used as a black matrix and coloring. After the layer was formed, it was applied by spin coating and pre-baked at 100 ° C for 5 minutes. Next, after patterning by photolithography, post baking was performed at 200 ° C for 60 minutes. As a result, a striped green color conversion portion having a width of 85 μm and a thickness of 3.3 μm was formed on the green colored portion.

 [0217] (Formation of planarization layer)

Next, after the color conversion layer is formed, a flat type obtained by diluting an acrylate-based photocurable resin (manufactured by Nippon Steel Chemical Co., Ltd., trade name: “V_259PA / PH5”) with propylene glycol monomethyl etherate. Prepare a coating solution for forming the cocoon layer and apply it by spin coating. Pre-baking was performed at 0 ° C for 5 minutes. Next, after patterning by photolithography, post-baking is performed at 200 ° C for 60 minutes, and transparent flattening covering the entire color layer and color conversion layer with a thickness of 2 μΐη on the color conversion layer A layer was formed.

[0218] (Formation of gas barrier layer)

 Next, using the Si N target (3N) by sputtering on the above flat layer,

 3 4

 Argon gas introduction amount: 40 sccm, RF power: 430 kW, substrate temperature: 100. The film was formed with C, and a 150 nm thick silicon oxynitride film was laminated to form a transparent gas barrier layer.

 A color filter substrate for an organic EL element was produced by the series of operations described above.

 [0219] (Formation of transparent electrode layer)

 Next, an indium tin oxide (ITO) electrode film with a thickness of 150 nm is formed on the gas barrier layer of the color filter substrate for the organic EL element by an ion plating method, and a photosensitive resist is applied on the electrode film. Then, mask exposure, development, and etching of the electrode film were performed to form a transparent electrode layer.

 [0220] (Formation of auxiliary electrode)

 Next, a chromium thin film (thickness 0 · 2 / m) is formed by sputtering on the entire surface of the gas barrier layer so as to cover the transparent electrode layer, a photosensitive resist is applied on the chromium thin film, and a mask is formed. Exposure, development, and etching of the chromium thin film were performed to form auxiliary electrodes. This auxiliary electrode was a striped pattern formed on the transparent electrode layer so as to run on the color conversion layer from the transparent substrate.

 [0221] (Formation of insulating layer and partition wall)

 Using a coating liquid for insulating layer formation in which ARTON), a norbornene resin with an average molecular weight of approximately 100000, manufactured by iSR, is diluted with toluene, is applied onto the gas barrier layer so as to cover the transparent electrode layer by spin coating. After coating, beta (100 ° C., 30 minutes) was performed to form an insulating film (thickness 1 tm). Next, a photosensitive resist was applied on the insulating film, mask exposure, development, and etching of the insulating film were performed to form an insulating layer. This insulating layer is a striped pattern (width 20 μm) that intersects the transparent electrode layer at a right angle, and is located on the black matrix.

Next, spin-coating the partition wall coating (manufactured by Nippon Zeon Co., Ltd., photoresist, ZPN1100) It was applied to the entire surface so as to cover the insulating layer by the method, and pre-beta (70 ° C, 30 minutes) was performed. Thereafter, exposure was performed using a predetermined photomask, development was performed with a developing solution (manufactured by Zeon Corporation, ZTMA-100), and then post beta (100 ° C., 30 minutes) was performed. As a result, a partition wall was formed on the insulating layer. The partition wall had a shape with a height of 10 zm, a lower part (insulating layer side) width of 15 μm, and an upper part width of 26 μm.

[0222] (Formation of organic EL layer)

 Next, an organic EL layer composed of a hole injection layer, a white light emitting layer, and an electron injection layer was formed by vacuum deposition using the partition wall as a mask.

That is, first, 4, 4 ′, 4 ”tris [N— (3-methylphenyl) _N_phenylamino] triphenylamine is added through a photomask having an opening corresponding to the image display area. By depositing 4, 4'-bis [N- (1-naphthyl) -N-phenylamino] biphenyl to a thickness of 20 nm and depositing the film, the partition wall was masked. The material for forming the hole injection layer passed only between the partition walls, and the hole injection layer was formed on the transparent electrode layer.

 Similarly, 4,4′-bis (2,2, -divinylvinyl) biphenyl (fluorescence peak wavelength: 465 nm (solid)) was deposited to 40 nm to form a film. At the same time, a small amount of rubrene (manufactured by Aldrich Co., Ltd., fluorescence peak wavelength: 585 nm (dimethylformamide 0.1 wt% solution)) was contained. This formed the white light emitting layer.

 Thereafter, tris (8-quinolinol) aluminum was deposited to a thickness of 20 nm to form an electron injection layer. The organic EL layer formed in this manner exists between the partition walls as a stripe pattern with a width of 280 / im, and a dummy organic layer with the same layer structure on the upper surface of the partition wall. An EL layer was formed.

[0224] (Formation of counter electrode layer)

Next, magnesium and silver are simultaneously vapor-deposited by vacuum vapor deposition (magnesium vapor deposition rate) on the area where the partition wall is formed through a photomask having a predetermined opening wider than the image display area. = 1. 3 ~: 1. 4 nm / second, silver deposition rate = 0. InmZ second). As a result, a partition electrode portion was used as a mask to form a 200-nm-thick counter electrode layer made of magnesium Z-silver compound on the organic EL layer. This counter electrode layer has a width of 280 A β m stripe pattern exists on the organic EL layer, and a dummy counter electrode layer was also formed on the upper surface of the partition wall.

 An organic EL device was fabricated by the above series of operations.

[0225] (Organic EL display device)

 The organic EL element was sealed to obtain an organic EL display device.

[0226] [Example 4]

 In Example 3, an organic EL display device was produced in the same manner as in Example 3 except that the thickness of the green color conversion portion was 10.8 m.

[0227] [Comparative Example 2]

 An organic EL display device was produced in the same manner as in Example 3 except that the color conversion layer was not formed in Example 3.

[0228] [Evaluation]

 For the organic EL display devices of Examples 3 and 4 and Comparative Example 2, chromaticity X, y and reflectance Y were measured using a spectrocolorimeter CM2500d manufactured by Minolta Co., Ltd. The results are shown in Table 1 below.

 [0229] [Table 1]

Table 1 shows that Examples 3 and 4 can observe a brighter green color and can realize a wider color reproduction range than Comparative Example 2. [0231] [Example 5]

 In Example 3, an organic EL display device was produced in the same manner as in Example 3 except that a colored layer and a color conversion layer were formed as shown below.

 [0232] (Formation of colored layer)

 First, red and blue colored portion forming coating solutions were prepared. The red colorant is a condensed azo pigment (Chinoku 'Specialty' Chemicals, Chromophthal Red BRN), and the blue colorant is an anthraquinone pigment (Ciba 'Specialty' Chemikanorez, Chromophthalate). Blue A3R) was used respectively. As binder resin, acrylic UV curable resin composition (acrylic UV curable resin 20%, acrylic UV curable resin monomer 20%, additive 5%, propylene glycol monomethyl ether acetate (PG MEA) 55% ) Was used. Blend 10 parts of the acrylic UV curable resin composition with 1 part of each colorant (all parts are based on mass), and mix and disperse thoroughly to form red and blue colored parts. A coating solution was obtained.

 Next, a green colored part forming coating solution was prepared. As the green colorant, a phthalocyanine green pigment (manufactured by Toyo Ink Co., Ltd., Lionol Green 2Y-301) was used. As the binder resin, the above acrylic UV curable resin composition was used. Blend 10 parts of the acrylic UV curable resin composition with 1 part of the colorant (all parts are based on mass) and thoroughly mix and disperse to obtain a green colored part forming coating solution. It was.

[0233] Each colored portion was formed using the above-described coating solutions for forming colored portions. That is, on the transparent base material on which the above black matrix was formed, the red colored portion forming coating solution was applied by a spin coating method, and pre-baked at 120 ° C. for 2 minutes. Then, exposure using a photomask (accumulated exposure 300MjZcm ^2), was present image with a developer solution _(0. 05./ ο Kappa_〇_Ita solution). Next, post-bake for 60 minutes at 230 ° C was performed, and synchronized with the black matrix pattern. Striped red colored parts with a width of 85 xm and a thickness of 3.0 xm, with the width direction being black. It formed so that it might become the short side direction of the opening part of a matrix. Thereafter, a green colored portion forming coating solution and a blue colored portion forming coating solution were sequentially used to form a striped green colored portion having a width of 85 zm and a thickness of 1.6 μm, and a width of 85 μπι and a thickness of 3 A blue colored portion having an O xm stripe shape was formed. As a result, the colored portions of the three primary colors are repeatedly arranged in the width direction. A colored layer was formed.

 [0234] (Formation of color conversion layer)

 An alkali-soluble negative photosensitive resist in which a green conversion phosphor (manufactured by Aldrich, Coumarin 6) is dispersed is used as a coating solution for forming a green color conversion part, and this coating solution for forming a green color conversion part is used as a black matrix and coloring. After the layer was formed, it was applied by spin coating and pre-baked at 100 ° C for 5 minutes. Next, after patterning by photolithography, post baking was performed at 200 ° C for 60 minutes. As a result, a striped green color conversion portion having a width of 85 μm and a thickness of 3.3 μm was formed on the green colored portion.

 [0235] (Evaluation)

 Similar to the organic EL display devices of Examples 3 and 4, the organic EL display device of Example 5 was capable of observing a vivid green color and realized a wider color reproduction range.

Claims

The scope of the claims  [1] An organic electoluminescence comprising a transparent substrate, a colored layer formed in a pattern on the transparent substrate, and a color conversion layer partially formed on the colored layer. Color filter substrate for the sensor element.  [2] The color filter substrate for an organic electoluminescence device according to [1], wherein the color conversion layer is formed in a pattern on the colored layer.  [3] The colored layer includes a red colored portion, a green colored portion, and a blue colored portion, and the color conversion layer is partially formed on the red colored portion and the green colored portion. The color filter substrate for an organic electoluminescence element according to claim 1 or 2, further comprising at least one of the green color conversion portions partially formed thereon.  [4] The color filter substrate for an organic electoluminescence device according to [3], wherein a red color conversion part is not formed on the red coloring part.  [5] The color finer substrate for an organic electoluminescence device according to any one of [1] to [4] above, wherein a flat layer is formed on the color conversion layer.  [6] The color filter substrate for an organic electoluminescence device according to [5], wherein the planarizing layer has light scattering properties.  [7] The colored layer has a red colored portion, a green colored portion, and a blue colored portion, and the color conversion layer has at least a green color converted portion formed on the green colored portion, and the green color The area of the conversion unit is larger than the area of each of the red color conversion unit formed on the red coloring unit and the blue color conversion unit formed on the blue coloring unit. A color filter substrate for an organic electoluminescence device according to item 1 of the range.  8. The color filter substrate for an organic electoluminescence device according to claim 7, wherein the red color conversion part and the blue color conversion part are formed. [9] The difference between the thickness of the red colored portion, the combined thickness of the green colored portion and the green color converting portion, and the thickness of the blue colored portion is 2.0 / m or less. The color filter substrate for an organic electoluminescence element according to claim 8. [10] The thickness of the red colored portion, the combined thickness of the green colored portion and the green color converting portion, and the thickness of the blue colored portion are within the range of 1 μΐη to 3 μΐη. 10. A color filter substrate for an organic electoluminescence device according to claim 8 or 9, wherein the color filter substrate is an organic electroluminescence device.  [11] The color filter substrate for an organic electoluminescence device according to [7] or [8], wherein a green color conversion part is formed on the red coloring part [12] The color filter substrate for an organic electoluminescence device according to any one of [7] to [11] above, wherein a flat layer is formed on the color conversion layer.  [13] The color filter substrate for an organic electoluminescence device according to any one of [1] to [12], wherein a gas barrier layer is formed on the color conversion layer.  [14] The organic electroluminescent device according to any one of claims 1 to 13, wherein a light-shielding portion is formed between the colored layers on the transparent substrate. Child color filter substrate.  [15] On the color conversion layer side surface of the color filter substrate for an organic electoluminescence device according to any one of claims 1 to 14 and the color filter substrate for the organic electroluminescence device. It has a formed transparent electrode layer, an organic electroluminescent layer formed on the transparent electrode layer and including at least a light emitting layer, and a counter electrode layer formed on the organic electroluminescent layer. An organic electroluminescence display device.  16. The organic electoluminescence display device according to claim 15, wherein the light emitting layer emits white light from a two-wavelength light source.