CN101609238B - Pixel array substrate with color filter array and display panel - Google Patents

Abstract

The invention provides a pixel array substrate with a color filter array and a display panel. The substrate is provided with a plurality of pixel areas and a shading area. The active element array is positioned on the substrate. The color filter array is arranged on the substrate. The color filter array comprises a light shielding pattern layer and a plurality of color filter patterns, wherein the light shielding pattern layer is positioned in the light shielding area. The color filter patterns are respectively positioned in the pixel areas and extend from the pixel areas to the shading areas, wherein the color filter patterns extending from the adjacent pixel areas form a laminated structure in the shading areas. The pixel electrode layer is electrically connected with the active element array. Therefore, the pixel array substrate with the color filter array has the advantages of meeting both the process requirements and the optical density of the product.

Description

Pixel array substrate with color filter array and display panel

technical field

The present invention relates to a substrate and a display device panel, and in particular to a pixel array substrate with a color filter array and a display panel.

Background technique

Liquid crystal display has the advantages of high image quality, small size, light weight, low voltage drive, low power consumption and wide application range, so it has replaced cathode ray tube (cathode ray tube, CRT) to become the mainstream of the new generation of display. A traditional liquid crystal display panel is composed of a color filter substrate (color filter), a thin film transistor array substrate (thin film transistor array substrate, TFT array substrate), and a liquid crystal layer (liquid crystal layer) arranged between the two substrates. constitute. However, this liquid crystal display panel is prone to misalignment when the color filter substrate and the thin film transistor array substrate are bonded.

In order to improve the above problems, the known technology proposes a thin film transistor array substrate (color filter on array substrate, COA substrate) with a color filter layer, a pair of substrates, a plurality of spacers and a liquid crystal layer. LCD display panel. The spacer and the liquid crystal layer are disposed between the TFT array substrate with the color filter layer and the opposite substrate, and the spacer can be used to maintain the gap between the TFT array substrate with the color filter layer and the opposite substrate. In such a liquid crystal display panel, since the color filter layer is directly formed on the thin film transistor array substrate, there will be no alignment error in assembly.

It is worth noting that in the manufacturing process of this kind of liquid crystal display panel, based on the consideration of alignment accuracy in the process, the black matrix material layer needs to use a slightly transparent material, so that the process machine can process the black matrix material layer. Before the patterning process, the alignment mark located on the underlying film layer can still be grasped by the machine through the slightly transparent black matrix material layer, so as to ensure the alignment between different film layers precision. However, when the black matrix material layer selects a material with a little light transmittance based on the foregoing considerations. The patterned black matrix often cannot achieve a complete light-shielding effect, resulting in a decrease in the contrast of the liquid crystal display panel and affecting the display quality.

Contents of the invention

The invention provides a pixel array substrate with a color filter array, which can improve the alignment accuracy in the manufacturing process, thereby improving the yield rate and reducing the cost.

The present invention provides a display panel, which has excellent alignment accuracy in the manufacturing process to produce high-contrast products.

The invention provides a pixel array substrate with a color filter array, which includes a substrate, an active element array, a color filter array and a pixel electrode layer. There are multiple pixel regions and a light shielding region on the substrate. The active element array is located on the substrate. The color filter array is disposed on the substrate, wherein the color filter array includes a light-shielding pattern layer and a plurality of color filter patterns. The light-shielding pattern layer is located in the light-shielding area. A plurality of color filter patterns are respectively located in the pixel area and extend from the pixel area to the light-shielding area, wherein the color filter patterns extending from adjacent pixel areas form a laminated structure in the light-shielding area. The pixel electrode layer is electrically connected with the active element array.

The present invention further provides a display panel, which includes a pixel array substrate with a color filter array, an opposite substrate, and a display medium. A pixel array substrate with a color filter array includes a substrate, an active element array, a color filter array and a pixel electrode layer. There are multiple pixel regions and a light shielding region on the substrate. The active element array is located on the substrate. The color filter array is disposed on the substrate, wherein the color filter array includes a light-shielding pattern layer and a plurality of color filter patterns. The light-shielding pattern layer is located in the light-shielding area. A plurality of color filter patterns are respectively located in the pixel area and extend from the pixel area to the light-shielding area, wherein the color filter patterns extending from adjacent pixel areas form a laminated structure in the light-shielding area. The pixel electrode layer is electrically connected with the active element array. The opposite substrate is located on the opposite side of the pixel array substrate with the color filter array. The display medium is located between the pixel array substrate with the color filter array and the opposite substrate.

The beneficial effect of the present invention is that, according to the technical solution provided by the present invention, materials with a slightly lower optical density can be selected for production during the production process of the light-shielding pattern layer, so as to improve the alignment accuracy between film layers in the process. On the other hand, at the corresponding position of the light-shielding pattern layer in the light-shielding area, a laminated structure is formed in the light-shielding area by using color filter patterns extending from adjacent pixel areas, which can assist the light-shielding of the light-shielding pattern layer in the light-shielding area The effect is to increase the contrast of the product.

Description of drawings

FIG. 1 is a schematic partial cross-sectional view of a pixel array substrate with a color filter array according to an embodiment of the present invention.

2A to 2C are respectively schematic cross-sectional views of different types of laminated structures in an embodiment of the present invention.

FIG. 3 is a schematic partial cross-sectional view of a pixel array substrate with a color filter array according to an embodiment of the present invention.

FIG. 4 is a schematic partial cross-sectional view of a pixel array substrate with a color filter array according to an embodiment of the present invention.

FIG. 5 is a schematic partial cross-sectional view of a pixel array substrate with a color filter array according to an embodiment of the present invention.

FIG. 6 is a schematic partial cross-sectional view of a display panel according to an embodiment of the present invention.

Reference number

200, 300, 400, 500, 600: Pixel array substrate with color filter array

210: Substrate

212: pixel area

214: shading area

220: active element array

222: Active components

230: color filter array

232: Shading pattern layer

234: color filter pattern

234B: Blue filter pattern

234G: Green filter pattern

234R: Red filter pattern

240: pixel electrode layer

250, 250A, 250B, 250C: laminated structure

720: opposite substrate

710: display media

722: common electrode

Detailed ways

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

FIG. 1 is a schematic partial cross-sectional view of a pixel array substrate with a color filter array according to an embodiment of the present invention. Referring to FIG. 1 , the pixel array substrate 200 with a color filter array in this embodiment includes a substrate 210 , an active device array 220 , a color filter array 230 and a pixel electrode layer 240 . Specifically, the substrate 210 has a plurality of pixel regions 212 and a light shielding region 214 . In particular, the light shielding area 214 surrounds each pixel area 212 . The active device array 220 is located on the substrate 210 . The color filter array 230 is disposed on the substrate 210, wherein the color filter array 230 includes a light-shielding pattern layer 232 located in the light-shielding area 214 and a plurality of color filter patterns 234, and these color filter patterns 234 are respectively located in the pixel area 212 and automatically The pixel area 212 extends to the light-shielding area 214 , wherein the color filter patterns 234 extending from adjacent pixel areas 212 form a stacked structure 250 in the light-shielding area 214 . The pixel electrode layer 240 is electrically connected to the pixel region 212 on the substrate 210 with the active device array 220 . In more detail, the active element array 220 has a plurality of active elements 222 arranged in an array, and each active element 222 is correspondingly disposed in each pixel region 212, and the pixel electrode layer 240 has a plurality of pixel electrodes 242, corresponding to ground is disposed in each pixel region 212 and electrically connected to the corresponding active device 222 .

Furthermore, in this embodiment, the light-shielding pattern layer 232 is, for example, located between the active device array 220 and the color filter pattern 234 . Moreover, the manufacturing process of the pixel array substrate 200 with the color filter array includes the following steps. Firstly, the active device array 220 is formed on the substrate 210 , and an alignment mark is made on a specific position of a specific film layer of the active device array 220 . Afterwards, a light-shielding material layer is completely formed on the active device array 220, and a light-shielding pattern layer 232, such as a black matrix, is produced through a patterning process. It should be noted that, in the above-mentioned patterning process of the light-shielding pattern layer 232, the alignment mark located at the bottom layer is picked up through the light-shielding material layer through the exposure machine first, and then an exposure process is performed, and then a development process is performed to form the pattern. Thinning the light-shielding material layer to form a black matrix. In this embodiment, the light-shielding material layer may be made of a material with a slightly lower optical density value, so as to increase the recognition rate of the alignment mark by the machine.

In detail, the optical density of the light-shielding pattern layer 232 is, for example, between 0.6˜3.4. In this way, when the machine picks up the alignment mark located on the bottom layer of the light-shielding material layer, it can easily and efficiently identify the clearer alignment mark, avoiding the misalignment between the upper and lower film layers caused by the alignment deviation. Unfavorable problems such as lower aperture ratio. Therefore, the pixel array substrate 200 with a color filter array in this embodiment can improve the alignment accuracy of the process and save process time during the manufacturing process, and can choose an optical density value that is easier to obtain in the selection of the light-shielding material layer Slightly lower material, so it will help to save material cost.

On the other hand, the pixel array substrate 200 with a color filter array in this embodiment has a laminated structure 250 composed of color filter patterns 234 in the light-shielding area 214, because the laminated structure 250 can also provide light shielding for light Effect. In this way, the light-shielding area 214 provided by the laminated structure 250 formed by the color filter pattern 234 can further enhance the light-shielding effect of the light-shielding pattern layer 232 , and indeed block light from passing through the light-shielding area 214 . In detail, the optical density of the laminated structure 250 is, for example, between 0.6˜1.2. And in this embodiment, the optical density value of the overlapped area of the light-shielding pattern layer 232 and the laminated structure 250 is, for example, 1.8-4.0, and the higher the optical density value, the better the light-shielding effect. Therefore, after the fabrication of the pixel array substrate 200 with the color filter array in this embodiment is completed, a certain degree of light-shielding effect can still be maintained in the light-shielding region 214 , which will help to improve the contrast of the product.

2A to 2C are respectively schematic cross-sectional views of different types of laminated structures in an embodiment of the present invention. Please refer to FIG. 2A, the color filter pattern 234 is composed of a red filter pattern 234R, a green filter pattern 234G and a blue filter pattern 234B, for example, and in this embodiment, the laminated structure 250A is made of a green filter pattern The pattern 234G is composed of the red filter pattern 234R. Please refer to FIG. 2B . In this embodiment, the laminated structure 250B is composed of a green filter pattern 234G and a blue filter pattern 234B. Please refer to FIG. 2C again. In this embodiment, the laminated structure 250C is composed of a blue filter pattern 234B and a red filter pattern 234R. Table 1 is a list of measured optical density values of the light-shielding pattern layer 232 before and after using the above-mentioned different types of laminated structures 250A, 250B, and 250C. It is 1 micron (μm).

Table 1

Optical density value shading pattern layer 232 Light-shielding pattern layer 232+laminate structure 250A shading pattern layer 232 shading pattern layer 232+ laminated structure 250B shading pattern layer 232 shading pattern layer 232+ laminated structure 250C 1 1.843 2.627 1.864 2.490 1.824 3.032 2 1.820 2.620 1.855 2.491 1.811 3.020 3 1.806 2.621 1.854 2.500 1.839 3.006 4 1.819 2.633 1.859 2.475 1.813 2.994 5 1.823 2.623 1.862 2.475 1.863 3.030 average 1.822 2.625 1.859 2.486 1.830 3.016

As shown in Table 1, by properly selecting the optical density value of the light-shielding pattern layer 232 itself, the alignment accuracy in the production process can be improved and adverse problems such as lower aperture ratio caused by alignment offset can be reduced, thereby enabling the process to enjoy a higher Process margin. On the other hand, by extending the color filter patterns 234 of different colors from the pixel area 212 to the light-shielding area 214 to form a laminated structure 250, the optical density value of the light-shielding area 214 can be greatly improved. In other words, the laminated structure 250 of the present invention It is helpful to improve the shading effect of the shading area 214 to obtain a high-contrast product. As shown in Table 1, in this embodiment, the laminated structures 250A, 250B, and 250C can effectively improve the light-shielding effect. Among them, the light-shielding effect achieved by the laminated structure 250C composed of the blue filter pattern 234B and the red filter pattern 234R is better.

FIG. 3 is a schematic partial cross-sectional view of a pixel array substrate with a color filter array according to an embodiment of the present invention. Please refer to FIG. 3 , the pixel array substrate 300 with color filter array of this embodiment is similar to the pixel array substrate 200 with color filter array of the previous embodiment, but the pixel array with color filter array of this embodiment The substrate 300 may further include another color filter pattern 310 stacked on the stacked structure 250 of the light-shielding area 214 . In other words, the material of another color filter pattern 310 stacked on the laminated structure 250 is different from the material of the color filter film constituting the laminated structure 250 . For example, the blue filter pattern 234B is selected to be stacked on the laminated structure 250A formed by the green filter pattern 234G and the red filter pattern 234R, and the red filter pattern 234R is selected to be stacked on the green filter pattern 234G. The stacked structure 250B formed with the blue filter pattern 234B, or the red filter pattern 234R is selected to be stacked on the stacked structure 250C formed with the blue filter pattern 234B and the red filter pattern 234R. Since the filter wavelengths of the color filter patterns 234 of different colors are different, the above-mentioned stacking structure can not only greatly improve the light-shielding effect of the light-shielding area 214, but also the above-mentioned process is the same as the original process, only need to modify the original mask Partial modification will not increase the mask process.

Of course, the present invention does not limit the relative positions between the laminated structure and the light-shielding pattern, the active array substrate, and the pixel electrode layer, and the position and size of the laminated structure are not limited. For example, the substrate 210 further has a peripheral circuit area (not shown) and a fan-out area (not shown), the peripheral circuit area generally surrounds the pixel area and the light-shielding area and is adjacent to one side of the substrate, the fan-out area and the The peripheral circuits are connected, and the color filter pattern 234 further forms another stacked structure (not shown) in the peripheral circuit area or the fan-out area. Several implementations of the pixel array substrate with the color filter array of the present invention are enumerated below, but the present invention is not limited thereto.

FIG. 4 is a schematic partial cross-sectional view of a pixel array substrate with a color filter array according to an embodiment of the present invention. Please refer to FIG. 4 , in the pixel array substrate 400 with a color filter array in this embodiment, the light-shielding pattern layer 232 is located on the pixel electrode layer 240 , in other words, in this embodiment, the color filter pattern 234 constitutes The laminated structure 250 is located between the light-shielding pattern layer 232 and the active device array 220 . In this way, the effect of improving the alignment accuracy in the process and improving the contrast in the product can also be achieved. The rest of the components are similar to those of the foregoing embodiments and will not be repeated here.

FIG. 5 is a schematic partial cross-sectional view of a pixel array substrate with a color filter array according to an embodiment of the present invention. Referring to FIG. 5 , in the pixel array substrate 500 with a color filter array in this embodiment, the light-shielding pattern layer 232 is located between the pixel electrode layer 240 and the color filter array 220 . In this way, the effect of improving the alignment accuracy in the process and improving the contrast in the product can also be achieved. The rest of the components are similar to those of the foregoing embodiments and will not be repeated here.

FIG. 6 is a schematic partial cross-sectional view of a display panel according to an embodiment of the present invention. Please refer to FIG. 6 , on the practical application level, the display panel 700 includes the above-mentioned pixel array substrate 600 with a color filter array, a counter substrate 720 and a display medium 710, wherein the pixel array substrate 600 with a color filter array can be as follows In any of the aforementioned embodiments, such as the pixel array substrates 200 , 300 , 400 , and 500 with color filter arrays, the same components are represented by the same symbols, which will not be repeated here. In addition, the opposite substrate 720 is located on the opposite side of the pixel array substrate 600 with color filter array. In this embodiment, the opposite substrate 720 has a common electrode 722 facing the pixel array substrate 600 with color filter array. The display medium 710 is located between the pixel array substrate 600 having a color filter array and the opposite substrate 720 , wherein the display medium 710 presents different display effects through the voltage difference between the common electrode 722 and the pixel electrode layer 240 .

As mentioned above, in this embodiment, by setting the laminated structure 250 in the light-shielding area 214 of the pixel array substrate 600 with the color filter array, the light-shielding of the light-shielding pattern layer can be enhanced while improving the alignment accuracy of the process. effect to improve the contrast of the display panel 700 .

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the technical field of the present invention may make some changes without departing from the spirit and scope of the present invention. and modification, so the protection scope of the present invention should be determined by the scope defined in the claims.

Claims (4)

1. A pixel array substrate with a color filter array, characterized in that, the pixel array substrate comprises: a substrate with a plurality of pixel regions and a light-shielding region on the substrate; an active element array located on the substrate; A color filter array disposed on the substrate, wherein the color filter array includes: A light-shielding pattern layer located in the light-shielding area; the optical density of the light-shielding pattern layer is between 0.6 and 3.4; and A plurality of color filter patterns are respectively located in the pixel area and extend from the pixel area to the light-shielding area, wherein the color filter patterns extending from adjacent pixel areas are formed in the light-shielding area A laminated structure, the optical density value of the overlapping area between the light-shielding pattern layer and the laminated structure is between 1.8 and 4.0; the substrate further has a peripheral circuit area and a fan-out area, and the peripheral The circuit area generally surrounds the pixel area and the light-shielding area and is adjacent to one side of the substrate, the fan-out area is connected to the peripheral circuit area, wherein the plurality of color filter patterns are further than the The peripheral circuit area or the fan-out area constitutes another stack structure; and a pixel electrode layer electrically connected to the active element array; Another color filter pattern is stacked on the laminated structure in the light-shielding area, and the material of the another color filter pattern is different from the material of the color filter pattern constituting the laminated structure. 2. The pixel array substrate with a color filter array according to claim 1, wherein the light-shielding pattern layer is located between the active element array and the color filter pattern, and the color filter pattern Between and the pixel electrode layer or on the pixel electrode layer. 3. A display panel, characterized in that the display panel comprises: A pixel array substrate with a color filter array, including: a substrate with a plurality of pixel regions and a light-shielding region on the substrate; An array of active elements located on the substrate; A color filter array disposed on the substrate, wherein the color filter array includes: A light-shielding pattern layer located in the light-shielding area; the optical density of the light-shielding pattern layer is between 0.6 and 3.4; and A plurality of color filter patterns are respectively located in the pixel area and extend from the pixel area to the light-shielding area, wherein the color filter patterns extending from adjacent pixel areas are formed in the light-shielding area A laminated structure, the optical density value of the overlapping area between the light-shielding pattern layer and the laminated structure is between 1.8 and 4.0; the substrate further has a peripheral circuit area and a fan-out area, and the peripheral The circuit area generally surrounds the pixel area and the light-shielding area and is adjacent to one side of the substrate, the fan-out area is connected to the peripheral circuit area, wherein the plurality of color filter patterns are further than the The peripheral circuit area or the fan-out area constitutes another stack structure; and a pixel electrode layer electrically connected to the active element array; Another color filter pattern is stacked on the layered structure in the light-shielding area, and the material of the another color filter pattern is different from the material of the color filter pattern constituting the layered structure; a pair of facing substrates, located on the opposite side of the pixel array substrate with the color filter array; and A display medium is located between the pixel array substrate with the color filter array and the opposite substrate. 4. The display panel according to claim 3, wherein the light-shielding pattern layer is located between the active device array and the color filter pattern, between the color filter pattern and the pixel electrode layer occasionally or on the pixel electrode layer. the

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