KR20180007531A - optical sheet and display apparatus using the same - Google Patents

Abstract

The present invention relates to an optical sheet and a display device using the same, and a display device using the optical sheet includes a display panel, a light source module that irradiates light to the display panel, and a light source module disposed between the light source module and the display panel, The optical sheet includes a transparent support layer and a light absorbing layer formed on the transparent support layer and absorbing light of a specific wavelength range in a wavelength range of light incident from the outside, Wherein the light absorbing layer comprises a first light absorbing material having an absorption peak with respect to light of the first wavelength band, a second light absorbing substance having an absorption peak with respect to the light of the second wavelength band, and a second light absorbing material having an absorption peak with respect to light of the third wavelength band And a second light absorbing material having a second light absorbing material.

Description

TECHNICAL FIELD [0001] The present invention relates to an optical sheet and a display apparatus using the optical sheet.

The present invention relates to an optical sheet and a display device using the same.

Generally, a display device includes various optical sheets for improving image quality.

The optical sheets function to uniformly diffuse the light emitted from the light source according to their intrinsic functions and also function to improve the brightness of the light and also function to reduce reflection of external light .

Therefore, the display device uses one or a plurality of optical sheets stacked according to the optical characteristics of the light source.

BACKGROUND ART [0002] In recent years, display devices have been studied in a direction for reproducing colors close to natural colors.

In order for the display device to realize a color close to natural color, the light intensity generated from the light source should appear uniformly in all wavelength ranges.

When a light emitting diode (LED) is used as a light source, the LED array can be partially turned on and off, thereby reducing power consumption. In the case of RGB LEDs, the NTSC (National Television System Committee) color reproduction range specification It is possible to provide a more vivid image quality to the consumer by exceeding 100%.

However, a display device using an LED as a light source can realize three primary colors of light, but since it can not control light wavelengths to separate or merge light, color reproducibility is deteriorated and adversely affects image quality .

Therefore, it will be necessary to develop an optical sheet capable of improving the color reproducibility by controlling the optical wavelength in the future.

The present invention is directed to solving the above-mentioned problems and other problems. Another object of the present invention is to provide a light-emitting device having a first light-absorbing substance having an absorption peak with respect to light of a first wavelength band, a second light-absorbing substance having an absorption peak with respect to light of a second wavelength band, And a light absorbing layer including a light absorbing material disposed between the light absorbing layer and the light absorbing layer to improve the color reproduction ratio and a display device using the same.

Another object of the present invention is to provide an optical sheet capable of uniformly diffusing light using a transparent support layer including transparent polymer particles having different refractive indexes, and a display device using the same.

Another object of the present invention is to provide an optical sheet which can arrange a plurality of light absorbing lines to improve the color recall ratio and the light transmittance and to control them uniformly, and a display device using the same.

Another object of the present invention is to provide an optical sheet capable of increasing light transmittance by forming an air gap or transparent resin layer between mutually adjacent light absorbing lines, and a display device using the same.

Another object of the present invention is to provide an optical sheet capable of forming a concavo-convex shape having convex portions and concave portions on the side surface of the light absorbing line to remove noise light appearing between the light absorbing lines and to provide uniform brightness and a display device using the same will be.

Another object of the present invention is to provide an optical sheet and a display device using the same, which can partially remove adjacent light absorbers to remove noise light appearing between the light absorber lines and provide uniform brightness.

Another object of the present invention is to provide an optical sheet capable of determining the area and the number of the absorber lines in accordance with the peak wavelength in the wavelength range of light incident from the outside to improve the color reproduction rate and a display device using the same.

Another object of the present invention is to provide an optical sheet which can laminate a plurality of light absorbing layers and improve the color reproducibility and light transmittance and uniformly control them, and a display device using the same.

Another object of the present invention is to provide an optical sheet capable of determining the thickness and number of the light absorbing layer in accordance with the peak wavelength in the wavelength range of light incident from the outside to improve the color reproduction rate and a display device using the same.

Another object of the present invention is to provide an optical sheet capable of improving the color reproducibility by disposing an optical sheet having a light absorbing layer around a light source module and a light guide plate, and a display device using the same.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

The optical sheet according to an embodiment of the present invention includes a transparent support layer and a light absorbing layer formed on the transparent support layer and absorbing light of a specific wavelength band in a wavelength range of light incident from the outside, A second light absorbing material having an absorption peak with respect to the light of the second wavelength band, and a third light absorbing material having an absorption peak with respect to the light of the third wavelength band, .

A display device using an optical sheet according to an embodiment of the present invention includes a display panel, a light source module for emitting light to the display panel, and a light source module disposed between the light source module and the display panel, And a light absorbing layer formed on the transparent support layer and absorbing light of a specific wavelength band in a wavelength range of light incident from the outside, The light absorbing layer includes a first light absorbing material having an absorption peak with respect to light in the first wavelength band, a second light absorbing material having an absorption peak with respect to light in the second wavelength band, and a third light absorbing material having an absorption peak with respect to light in the third wavelength band. Absorbent material.

Effects of the optical sheet and the display device using the optical sheet according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, the first light absorbing material having an absorption peak for light of the first wavelength band, the second light absorbing substance having an absorption peak for light of the second wavelength band, A light absorbing layer including a third light absorbing material having an absorption peak with respect to the first light absorbing layer can be disposed to improve the color reproduction rate.

According to at least one embodiment of the present invention, light can be uniformly diffused using a transparent support layer including transparent polymer particles having different refractive indexes.

According to at least one of the embodiments of the present invention, a plurality of light absorbing lines can be arranged to improve the color recall ratio and the light transmittance and uniformly control.

According to at least one embodiment of the present invention, an air gap or a transparent resin layer is formed between the adjacent light-absorbing lines, thereby increasing the light transmittance.

According to at least one of the embodiments of the present invention, irregular shapes having convex portions and concave portions can be formed on the sides of the light absorbing lines to remove noise light appearing between the light absorbing lines and to provide uniform brightness.

According to at least one of the embodiments of the present invention, the light absorber lines adjacent to each other may be partially overlapped to remove noise light appearing between the light absorber lines and provide a uniform luminance.

According to at least one of the embodiments of the present invention, the area and number of the light absorbing lines are determined according to the peak wavelength among the wavelength ranges of the light incident from the outside, and the color gamut can be improved.

According to at least one of the embodiments of the present invention, a plurality of light absorbing layers may be laminated to improve the color recall ratio and the light transmittance and to control them uniformly.

According to at least one of the embodiments of the present invention, the thickness and the number of the light absorbing layer can be determined in accordance with the peak wavelength of the light wavelength range of the light incident from the outside, thereby improving the color gamut.

According to at least one of the embodiments of the present invention, an optical sheet having a light absorbing layer around the light source module and the light guide plate can be disposed to improve the color reproduction rate.

Further scope of applicability of the present invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and specific examples, such as the preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.

1 is a structural cross-sectional view showing an optical sheet according to the present invention.
FIGS. 2 and 3 are cross-sectional views illustrating the transparent support layer of FIG. 1. FIG.
4 is a perspective view showing an optical sheet according to the first embodiment of the present invention.
5 is a perspective view showing an optical sheet according to a second embodiment of the present invention.
6 and 7 are perspective views showing an optical sheet according to a third embodiment of the present invention.
8 to 10 are perspective views showing an optical sheet according to a fourth embodiment of the present invention.
11 to 13 are perspective views showing an optical sheet according to a fifth embodiment of the present invention.
14 to 16 are perspective views showing an optical sheet according to a sixth embodiment of the present invention.
17 is a perspective view showing an optical sheet according to a seventh embodiment of the present invention.
18 to 20 are perspective views showing an optical sheet according to an eighth embodiment of the present invention.
21 is a cross-sectional view showing an optical sheet according to a ninth embodiment of the present invention.
22 to 24 are sectional views showing an optical sheet according to a tenth embodiment of the present invention.
25 is a sectional view showing an optical sheet according to an eleventh embodiment of the present invention.
26 to 28 are sectional views showing an optical sheet according to a twelfth embodiment of the present invention.
29 to 32 are views showing a display device using an optical sheet according to the present invention.
33 to 36 are views showing an optical sheet disposed between the light source module and the light guide plate.
37 is a sectional view showing a light guide plate having a light absorbing layer formed thereon.
38 is a sectional view showing a light source module in which a light absorbing layer is formed.
39 is a graph showing the light transmittance according to the content of the light absorbent in the optical sheet according to the present invention.
40 is a graph showing the light transmittance according to the thickness of the light absorbing layer of the optical sheet according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

1 is a structural cross-sectional view showing an optical sheet according to the present invention.

1, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The transparent support layer 110 may be formed of any one of PMMA (Polymethylmethacrylate), PET (polyethylene terephthalate), COC (Cyclic Olefin Copolymers), PEN (polyethylene naphthalate), PC (Polycarbonate), PS But is not limited thereto. Here, the transparent support layer 110 supports the light absorbing layer 120 and can diffuse incident light uniformly.

Optionally, the transparent support layer 110 may comprise a plurality of transparent polymer particles. The reason for including the transparent polymer particles is that the incident light can be refracted by the transparent polymer particles to uniformly diffuse the light. The transparent polymer particle may include, but is not limited to, acrylic, PMMA, nylon, polystyrene, polyester, and benzoguanamine.

For example, the transparent polymer particles may have a refractive index different from that of the transparent support layer 110. This is because the diffusion rate of light can be increased.

As another example, the transparent polymer particles may be non-uniformly arranged in the transparent support layer 110. This is because the diffusion rate of light can be increased.

As another example, among transparent polymer particles, adjacent transparent polymer particles may have different diameters. This is because the diffusion rate of light can be increased.

Next, the light absorbing layer 120 is formed on the transparent support layer 110, and can absorb light of a specific wavelength band in the wavelength range of light incident from the outside. Here, the light absorbing layer 120 includes a first light absorbing material having an absorption peak with respect to light of the first wavelength band, a second light absorbing material having an absorption peak with respect to the light of the second wavelength band, And a third light absorbing material having a peak.

In one example, the first light absorbing material of the light absorbing layer 120 can absorb light in a wavelength range of about 300 nm to 400 nm. Here, the first light absorbing material of the light absorbing layer 120 may include a yellowish green color dye.

The second light absorbing material of the light absorbing layer 120 can absorb light of a wavelength range of about 400 nm to 500 nm. Here, the second light absorbing material of the light absorbing layer 120 may include at least one of a yellow dye, an orange dye, and a red dye.

Then, the third light absorbing material of the light absorbing layer 120 can absorb light of a wavelength range of about 500 nm to 600 nm. Here, the third light absorbing material of the light absorbing layer 120 may include at least one of a purple dye and a blue dye.

For example, the first light absorbing substance may be cyanine, the second light absorbing substance may be at least one of boron dipyrrne (BODIPY) and perylene, the third light absorbing substance may be porphyrin But is not limited to, at least one of Porphyrin, Porphyrazin, Triazaporphyrin, Phthalocyanin, and Diimmonium.

In addition, the light absorbing layer 120 may be a mixed material in which a polymer resin and a light absorbing material including first, second, and third light absorbing materials are mixed. Here, the polymer resin may include at least one of acryl, urethane, carbonate, epoxy, and polyethylene naphthalate, but is not limited thereto.

The content of the light absorbing substance may be about 0.005 wt% to about 0.2 wt% based on the polymer resin. This is because if the content of the light absorbing substance is about 0.005 wt% or less based on the polymer resin, the color reproduction rate is lowered, and if the content of the light absorbing substance is about 0.2 wt% or more based on the polymer resin, Because.

The thickness of the light absorbing layer 120 may be about 2 탆 to about 5 탆. The reason is that if the thickness of the light absorbing layer 120 is less than about 2 탆, the color reproduction rate is lowered, and if the thickness of the light absorbing layer 120 is more than about 5 탆, the luminance may be lowered.

The light absorbing layer 120 includes a first light absorbing line made of a first mixed material in which a polymer resin and a first light absorbing material are mixed, a second light absorbing line made of a second mixed material in which a polymer resin and a second light absorbing material are mixed, And a third light absorbing line made of a third mixed material in which the polymer resin and the third light absorbing material are mixed. Here, the first, second, and third light absorbing lines may be arranged along the longitudinal direction on the surface of the transparent support layer. Optionally, the plurality of first, second, and third light absorbing lines may be sequentially and repeatedly arranged along the longitudinal direction on the surface of the transparent support layer. The reason why the plurality of absorber lines are arranged is that the light transmittance and the color reproduction rate of the optical sheet can be partially controlled. For example, when light of a specific wavelength range is concentrated in a part of the optical sheet, an optical line having an excellent color reproducibility can be provided by disposing an absorption line capable of absorbing light of a specific wavelength band in the region.

The light-absorbing lines adjacent to each other among the first, second, and third light-absorbing lines may be arranged to have a certain interval from each other. The reason is to increase the light transmittance.

For example, an air gap may be formed between the adjacent light-absorbing lines.

Alternatively, a transparent resin layer may be formed between the adjacent light-absorbing lines. Here, the transparent resin layer may be the same material as the polymer resin contained in the light absorbing layer. The reason is to increase the light transmittance.

Further, the first, second, and third light absorbing lines may have a concavo-convex shape having a convex portion and a concave portion on a side surface. Here, the convex portion on the side of the light-absorbing line may be disposed corresponding to the concave portion on the side of the adjacent light-absorbing line, and the concave portion on the side of the light-absorbing line may be disposed corresponding to the convex portion on the side of the adjacent light- In one example, the planar shape of the convex portion and the concave portion may be at least one of triangular, hemispherical, rectangular, and polygonal. The reason why the concavo-convex shape having the convex portion and the concave portion is formed on the side surfaces of the first, second and third light-absorbing lines is that the noise light appearing between the light-absorbing lines can be removed and the uniform luminance can be provided.

In addition, the light-absorbing lines adjacent to each other among the first, second, and third light-absorbing lines may have overlapping areas where a part of them overlaps with each other. The reason why a part of the light-absorbing lines adjacent to each other is overlapped is because the noise light appearing between the light-absorbing lines can be removed and a uniform brightness can be provided.

In the overlap region, the thicknesses of the absorption lines overlapping each other may be different from each other. In one example, in the overlap region, the thickness of the absorption line overlapping with each other can be reduced in a gradient toward the adjacent absorption line. As another example, in the overlap region, the thickness of the absorption line overlapping with each other may gradually decrease in the direction of the adjacent absorption line.

Further, the areas of the first, second, and third light-absorbing lines may be different from each other. Here, the areas of the first, second, and third light absorbing lines may be determined according to the peak wavelength among the wavelength ranges of light incident from the outside. For example, when the peak wavelength is within 300 nm to 400 nm, the area of the first absorbing line may be wider than the area of the second and third absorbing lines. When the peak wavelength is within 400 nm to 500 nm, the area of the second light-absorbing line may be wider than the area of the first and third light-absorbing lines. Next, when the peak wavelength is within the range of 500 nm to 600 nm, the area of the third light-absorbing line may be wider than the area of the first and second light-absorbing lines. The reason why the areas of the first, second, and third light absorbing lines are determined according to the peak wavelength of light is that the color recall can be optimized.

In some cases, the number of the first, second, and third light absorbing lines may be plural, and the number of the first, second, and third light absorbing lines may be different from each other. Here, the number of the first, second, and third light absorbing lines may be determined according to the peak wavelength among the wavelength range of the light incident from the outside. For example, when the peak wavelength is within 300 nm to 400 nm, the number of the first light-absorbing lines may be larger than the number of the second and third light-absorbing lines. A When the peak wavelength is within 400 nm to 500 nm, the number of the second light-absorbing lines may be larger than the number of the first and third light-absorbing lines. Next, when the peak wavelength is within the range of 500 nm to 600 nm, the number of the third light-absorbing lines may be larger than the number of the first and second light-absorbing lines. The reason why the number of the first, second and third light-absorbing lines is determined according to the peak wavelength of light is as described above, because the color reproduction rate can be optimized.

The light absorbing layer 120 may include a first layer made of a first mixed material in which the polymeric resin and the first light absorbing material are mixed, a second mixed material layered on the first layer and mixed with the polymer resin and the second light absorbing material And a third layer made of a third mixed material which is laminated on the second layer and is mixed with the polymer resin and the third light absorbing material.

The thicknesses of the first, second and third layers may be different from each other. Here, the thicknesses of the first, second, and third layers can be determined according to the peak wavelength of the wavelength range of the light incident from the outside. For example, when the peak wavelength is within 300 nm to 400 nm, the thickness of the first layer may be thicker than the thickness of the second and third layers. The thickness of the second layer may be thicker than the thickness of the first and third layers when the peak wavelength is within 400 nm to 500 nm of the wavelength range of light incident from the outside. Next, when the peak wavelength of light entering from the outside is within the range of 500 nm to 600 nm, the thickness of the third layer may be thicker than the thickness of the first and second layers.

In some cases, the first, second, and third layers are each a plurality of, and the number of the first, second, and third layers may be different from each other. Here, the number of the first, second, and third layers may be determined according to the peak wavelength among the wavelength ranges of light incident from the outside. For example, when the peak wavelength is within 300 nm to 400 nm, the number of the first layers may be larger than the number of the second and third layers in the wavelength range of light incident from the outside. When the peak wavelength is within 400 nm to 500 nm, the number of the second layers may be larger than the number of the first and third layers. Next, when the peak wavelength is within the range of 500 nm to 600 nm, the number of the third layers may be larger than the number of the first and second layers.

As described above, the optical sheet of the present invention comprises a first light absorbing material having an absorption peak with respect to light of a first wavelength band, a second light absorbing substance having an absorption peak with respect to light of a second wavelength band, A light absorbing layer including a third light absorbing material having an absorption peak may be disposed to improve the color reproducibility.

FIGS. 2 and 3 are cross-sectional views illustrating the transparent support layer of FIG. 1. FIG.

2 and 3, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

Here, the transparent support layer 110 may be formed of any one of PMMA (Polymethylmethacrylate), PET (polyethylene terephthalate), COC (Cyclic Olefin Copolymers), PEN (polyethylene naphthalate), PC (Polycarbonate), PS But is not limited thereto.

The transparent support layer 110 may include a plurality of transparent polymer particles 112. The reason for including the transparent polymer particles 112 is that the incident light can be refracted by the transparent polymer particles 112 to uniformly diffuse the light. For example, the transparent polymer particles 112 may include at least one of acryl, PMMA, nylon, polystyrene, polyester, and benzoguanamine, but the present invention is not limited thereto.

In addition, the transparent polymer particles 112 may have a refractive index different from that of the transparent support layer 110. This is because the diffusion rate of light can be increased.

As another example, the transparent polymer particles 112 may be non-uniformly arranged in the transparent support layer 110. This is because the diffusion rate of light can be increased.

As another example, of the transparent polymer particles 112, adjacent transparent polymer particles may have different diameters. This is because the diffusion rate of light can be increased.

As shown in FIG. 2, the diameter D1 of one of the transparent polymer particles 112 may be larger than the diameter D2 of the other transparent polymer particles 112 disposed in the periphery thereof. Here, the diameter of the transparent polymer particles 112 may be smaller than the thickness of the transparent support layer 110. This is because when the diameter of the transparent polymer particles 112 is larger than the thickness of the transparent support layer 110, the transparent polymer particles 112 protrude from the surface of the transparent support layer 110, The adhesion of the light absorbing layer 120 may be difficult.

3, a light absorbing layer 120 may be disposed on the transparent support layer 110, and a concavity and convexity pattern 130 may be formed on the transparent support layer 110. Referring to FIG. Here, the reason why the concavo-convex pattern 130 is formed is to diffuse incident light. The diffusion effect can be greatly increased by inserting the transparent polymer particles 112 in the transparent support layer 110 and forming the uneven pattern 130 outside the transparent support layer 110. For example, the uneven pattern 130 may have a strip shape. In addition, the uneven pattern 130 has protrusions that protrude from the surface of the transparent support layer 110, and the protrusions are composed of a first surface and a second surface facing each other, and the angle between the first surface and the second surface May be an obtuse angle or an acute angle.

As described above, the present invention can uniformly diffuse light using a transparent support layer including transparent polymer particles having different refractive indexes.

4 is a perspective view showing an optical sheet according to the first embodiment of the present invention.

As shown in FIG. 4, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The light absorbing layer 120 is formed on the transparent support layer 110 and can absorb light of a specific wavelength range in a wavelength range of light incident from the outside. Here, the light absorbing layer 120 includes a first light absorbing material 122 having an absorption peak with respect to light in the first wavelength band, a second light absorbing material 124 having an absorption peak with respect to light in the second wavelength band, And a third light absorbing material 126 having an absorption peak with respect to the light of the wavelength band.

In one example, the first light absorbing material 122 of the light absorbing layer 120 can absorb light in a wavelength range of about 300 nm to 400 nm. Here, the first light absorbing material 122 of the light absorbing layer 120 may include a yellowish green color dye.

The second light absorbing material 124 of the light absorbing layer 120 can absorb light in a wavelength range of about 400 nm to 500 nm. Here, the second light absorbing material 124 of the light absorbing layer 120 may include at least one of a yellow dye, an orange dye, and a red dye.

Then, the third light absorbing material 126 of the light absorbing layer 120 can absorb light in a wavelength range of about 500 nm to 600 nm. Here, the third light absorbing material 126 of the light absorbing layer 120 may include at least one of a purple dye and a blue dye.

For example, the first, second, and third light absorbing materials 122, 124, and 126 of the light absorbing layer 120 may be selected from the group consisting of Porphyrin, Porphyrazin, Triazaporphyrin, Phthalocyanin, But is not limited to, at least one of perylene, diimmonium, cyanine, and boron dipyrrin (BODIPY).

For example, the first light absorbing substance may be cyanine, the second light absorbing substance may be at least one of boron dipyrrne (BODIPY) and perylene, the third light absorbing substance may be porphyrin But is not limited to, at least one of Porphyrin, Porphyrazin, Triazaporphyrin, Phthalocyanin, and Diimmonium.

As described above, the light absorbing layer 120 may be a mixed material in which a polymer resin 128 and a light absorbing material including the first, second, and third light absorbing materials 122, 124, and 126 are mixed. Here, the polymer resin 128 may include at least one of acryl, urethane, carbonate, epoxy, and polyethylene naphthalate, but is not limited thereto.

The content of the light absorbing substance may be about 0.005 wt% to about 0.2 wt% based on the polymer resin (128). The reason is that if the content of the light absorbing substance is less than about 0.005 wt% based on the polymer resin 128, the color reproduction rate is lowered. If the content of the light absorbing substance is about 0.2 wt% or more based on the polymer resin 128, This is because the luminance may be lowered.

The thickness t of the light absorbing layer 120 may be about 2 탆 to 5 탆. This is because if the thickness t of the light absorbing layer 120 is less than about 2 탆, the color reproducibility is lowered, and if the thickness t of the light absorbing layer 120 is more than about 5 탆, the brightness may decrease.

As described above, the optical sheet of the present invention is formed by forming a light absorbing layer with a mixed material in which a polymer resin 128 and a light absorbing material including the first, second and third light absorbing materials 122, 124, and 126 are mixed , The color reproducibility can be improved.

5 is a perspective view showing an optical sheet according to a second embodiment of the present invention.

5, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The light absorbing layer 120 is formed on the transparent support layer 110 and can absorb light of a specific wavelength range in a wavelength range of light incident from the outside.

Here, the light absorbing layer 120 includes a first light absorbing line 120a formed of a first mixed material in which the polymer resin 128 and the first light absorbing material 122 are mixed, a first light absorbing line 120b formed of the polymeric resin 128 and the second light absorbing material A second light absorbing line 120b made of a second mixed material in which the polymeric resin 128 and the third light absorbing material 126 are mixed and a third light absorbing line 120c made of a third mixed material in which the polymeric resin 128 and the third light absorbing material 126 are mixed, . Here, the first, second and third light absorbing lines 120a, 120b and 120c may be arranged along the longitudinal direction on the surface of the transparent support layer 110. [ The light-absorbing lines adjacent to each other can be arranged such that their side surfaces are in contact with each other.

The reason why the first, second and third light absorbing lines 120a, 120b and 120c are arranged is that the light transmittance and the color reproduction rate of the optical sheet can be partially controlled. For example, when light of a specific wavelength range is concentrated in a part of the optical sheet, an optical line having an excellent color reproducibility can be provided by disposing an absorption line capable of absorbing light of a specific wavelength band in the region.

As described above, the present invention can arrange a plurality of light absorbing lines, thereby improving the color recall ratio and the light transmittance and uniformly controlling them.

6 and 7 are perspective views showing an optical sheet according to a third embodiment of the present invention.

6 and 7, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The light absorbing layer 120 is formed on the transparent support layer 110 and can absorb light of a specific wavelength range in a wavelength range of light incident from the outside.

Here, the light absorbing layer 120 includes a first light absorbing line 120a formed of a first mixed material in which the polymer resin 128 and the first light absorbing material 122 are mixed, a first light absorbing line 120b formed of the polymeric resin 128 and the second light absorbing material A second light absorbing line 120b made of a second mixed material in which the polymeric resin 128 and the third light absorbing material 126 are mixed and a third light absorbing line 120c made of a third mixed material in which the polymeric resin 128 and the third light absorbing material 126 are mixed, . Here, the first, second and third light absorbing lines 120a, 120b and 120c may be arranged along the longitudinal direction on the surface of the transparent support layer 110. [

The first, second, and third light absorbing lines 120a, 120b, and 120c may be arranged to have mutually adjacent light absorbing lines at regular intervals. The reason is to increase the light transmittance.

For example, as shown in FIG. 6, an air gap 150 may be formed between the adjacent absorption lines.

As another example, as shown in FIG. 7, a transparent resin layer 140 may be formed between the adjacent light-absorbing lines. Here, the transparent resin layer 140 may be the same material as the polymer resin included in the light absorbing layer 120. The reason is to increase the light transmittance. In some cases, the transparent resin layer 140 may be formed of a material different from the polymer resin included in the light absorbing layer 120.

As described above, according to the present invention, an air gap or a transparent resin layer is formed between mutually adjacent light-absorbing lines to increase the light transmittance.

8 to 10 are perspective views showing an optical sheet according to a fourth embodiment of the present invention.

8 to 10, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The light absorbing layer 120 is formed on the transparent support layer 110 and can absorb light of a specific wavelength range in a wavelength range of light incident from the outside.

The light absorbing layer 120 includes a first light absorbing line 120a formed of a first mixed material in which the polymer resin 128 and the first light absorbing material 122 are mixed, a polymeric resin 128 and a second light absorbing material 124, A second light absorbing line 120b made of a mixed second material and a third absorbing line 120c made of a third mixed material in which the polymer resin 128 and the third light absorbing material 126 are mixed . Here, the first, second and third light absorbing lines 120a, 120b and 120c may be arranged along the longitudinal direction on the surface of the transparent support layer 110. [

The first, second and third light-absorbing lines 120a, 120b and 120c may have a concavo-convex shape having convex portions and concave portions on the side surfaces. Here, the convex portion on the side of the light-absorbing line may be disposed corresponding to the concave portion on the side of the adjacent light-absorbing line, and the concave portion on the side of the light-absorbing line may be disposed corresponding to the convex portion on the side of the adjacent light- In one example, the planar shape of the convex portion and the concave portion may be at least one of triangular, hemispherical, rectangular, and polygonal. The reason why the concavo-convex shape having the convex portion and the concave portion is formed on the side surfaces of the first, second and third light absorbing lines 120a, 120b and 120c is that the noise light appearing between the light absorbing lines is removed and the uniform luminance is provided I can do it.

9 shows a case where the planar shape of the convex portion and the concave portion is triangular, and Fig. 10 shows a case where the planar shape of the convex portion and the concave portion is a hemispherical shape .

A convexo-concave shape having a first convex portion 152 and a first concave portion 154 is formed on a side surface of the first absorbing line 120a and a convexo-concave shape having a convex shape is formed on the side surface of the second convex portion 152 Convex shape having a third convex portion 172 and a third concave portion 174 is formed on the side surface of the third light absorbing line 120c .

The first convex portion 152 of the first light absorbing line 120a is disposed corresponding to the second concave portion 164 of the second light absorbing line 120b and the first convex portion 152 of the first light absorbing line 120a is disposed corresponding to the second concave portion 164 of the first light absorbing line 120a, The concave portion 154 may be disposed corresponding to the second convex portion 162 of the second light-absorbing line 120b.

The second convex portion 162 formed on one side of the second light absorbing line 120b is disposed corresponding to the first concave portion 154 of the first light absorbing line 120a and the second convex portion 162 is disposed on the second light absorbing line The second convex portion 162 formed on the other side of the third light absorbing line 120b may be disposed corresponding to the third concave portion 174 of the third light absorbing line 120c. The second concave portion 164 formed on one side of the second light absorbing line 120b is disposed corresponding to the first convex portion 152 of the first light absorbing line 120a and the second light absorbing line The second concave portion 164 formed on the other side of the third light absorbing line 120b may be disposed corresponding to the third convex portion 172 of the third light absorbing line 120c.

The third convex portion 172 of the third light absorbing line 120c is disposed corresponding to the second concave portion 164 of the second light absorbing line 120b and the third convex portion 172 of the third light absorbing line 120c is disposed corresponding to the second concave portion 164 of the third light absorbing line 120c, The concave portion 174 may be disposed corresponding to the second convex portion 162 of the second light-absorbing line 120b.

As described above, according to the present invention, it is possible to form a concavo-convex shape having convex portions and concave portions on the side surface of the light absorbing line to remove noise light appearing between the light absorbing lines and to provide uniform brightness.

11 to 13 are perspective views showing an optical sheet according to a fifth embodiment of the present invention.

11 to 13, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The light absorbing layer 120 is formed on the transparent support layer 110 and can absorb light of a specific wavelength range in a wavelength range of light incident from the outside.

The light absorbing layer 120 includes a first light absorbing line 120a formed of a first mixed material in which the polymer resin 128 and the first light absorbing material 122 are mixed, a polymeric resin 128 and a second light absorbing material 124, A second light absorbing line 120b made of a mixed second material and a third absorbing line 120c made of a third mixed material in which the polymer resin 128 and the third light absorbing material 126 are mixed . Here, the first, second and third light absorbing lines 120a, 120b and 120c may be arranged along the longitudinal direction on the surface of the transparent support layer 110. [

The light-absorbing lines adjacent to each other among the first, second, and third light-absorbing lines 120a, 120b, and 120c may have overlapping areas where a part of the light-absorbing lines are overlapped with each other. The reason why a part of the light-absorbing lines adjacent to each other is overlapped is because the noise light appearing between the light-absorbing lines can be removed and a uniform brightness can be provided.

In the overlap region, the thicknesses of the absorption lines overlapping each other may be different from each other. In one example, in the overlap region, the thickness of the absorption line overlapping with each other can be reduced in a gradient toward the adjacent absorption line. As another example, in the overlap region, the thickness of the absorption line overlapping with each other may gradually decrease in the direction of the adjacent absorption line.

As shown in FIG. 11, one region of the first light-absorbing line 120a and one region of the second light-absorbing line 120b may partially overlap to form an overlapping region. Here, the thickness t1 of the overlap region is thinner than the thickness of the other regions of the first light-absorbing line 120a, and the thickness t2 of the overlap region is thinner than the thickness of the region of the second light-absorbing line 120b. Therefore, when the thickness t1 of the first light-absorbing line 120a and the thickness t2 of the second light-absorbing line 120b are added together in the overlap region, the thickness is equal to the thickness of the other region. For example, the sum of the overlap region thickness t1 of the first absorption line 120a and the overlap region thickness t2 of the second absorption line 120b may be about 2 um to about 5 um.

One side of the second light-absorbing line 120b is partially overlapped with one side of the first light-absorbing line 120b and the other side of the second light-absorbing line 120b is overlapped with one side of the third light- It can be partially overlapped with the area. Here, the thickness t2 of the overlap region may be thinner than the thickness of the other region of the second light-absorbing line 120b.

In addition, one side region of the third light-absorbing line 120c and one side region of the second light-absorbing line 120b may partially overlap to form an overlapping region. Here, the thickness t3 of the overlap region is thinner than the thickness of the other regions of the third light-absorbing line 120c, and the thickness t2 of the overlap region is thinner than the thickness of the region of the second light-absorbing line 120b. Therefore, in the overlap region, the thickness t3 of the third light-absorbing line 120c and the thickness t2 of the second light-absorbing line 120b are equal to the thicknesses of the other regions. As an example, the sum of the overlap region thickness t3 of the third absorption line 120c and the overlap region thickness t2 of the second absorption line 120b may be about 2 um to about 5 um.

In some cases, as shown in FIG. 12, the thickness t1 of the overlap region may be decreased in a gradient toward the adjacent second light-absorbing line 120b in the first light-absorbing line 120a. The thickness t2 of the overlap region in the second light-absorbing line 120b may decrease in the direction of the adjacent first light-absorbing line 120a to a gradient and decrease in the direction of the adjacent third light-absorbing line 120c in a graded manner . Then, the thickness t3 of the overlap region in the third light-absorbing line 120c can be reduced to a gradient toward the adjacent second light-absorbing line 120b.

In other cases, as shown in FIG. 13, the thickness t1 of the overlap region may gradually decrease in the direction of the adjacent second light-absorbing line 120b in the first light-absorbing line 120a. The thickness t2 of the overlap region in the second absorption line 120b may gradually decrease toward the adjacent first absorption line 120a and gradually decrease toward the adjacent third absorption line 120c . Next, the thickness t3 of the third absorption line 120c may gradually decrease in the direction of the adjacent second absorption line 120b.

As described above, the present invention can partially overlap the adjacent light-absorbing lines to remove noise light appearing between the light-absorbing lines and provide uniform brightness.

14 to 16 are perspective views showing an optical sheet according to a sixth embodiment of the present invention.

As shown in FIGS. 14 to 16, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The light absorbing layer 120 is formed on the transparent support layer 110 and can absorb light of a specific wavelength range in a wavelength range of light incident from the outside.

The light absorbing layer 120 includes a first light absorbing line 120a formed of a first mixed material in which the polymer resin 128 and the first light absorbing material 122 are mixed, a polymeric resin 128 and a second light absorbing material 124, A second light absorbing line 120b made of a mixed second material and a third absorbing line 120c made of a third mixed material in which the polymer resin 128 and the third light absorbing material 126 are mixed . Here, the first, second and third light absorbing lines 120a, 120b and 120c may be arranged along the longitudinal direction on the surface of the transparent support layer 110. [

The areas of the first, second and third light-absorbing lines 120a, 120b and 120c may be different from each other. Here, the areas of the first, second, and third light absorbing lines 120a, 120b, and 120c may be determined according to the peak wavelength of light incident from the outside.

The area of the first absorbing line 120a is larger than the area of the second and third absorbing lines 120b and 120c when the peak wavelength is within 300 nm to 400 nm among the wavelength ranges of light incident from outside as shown in FIG. It can be wide. The reason is that the color reproducibility can be optimized by raising the light absorption rate in the wavelength range of 300 nm to 400 nm.

15, the area of the second light absorbing line 120b is larger than the area of the first and third light absorbing lines 120a and 120c when the peak wavelength is within 400 nm to 500 nm, Can be wider than that. The reason is that the color reproducibility can be optimized by raising the light absorptivity in the wavelength range of 400 nm to 500 nm.

Next, as shown in FIG. 16, the area of the third light-absorbing line 120c is set such that the area of the first and second light-absorbing lines 120a and 120b, when the peak wavelength is within the range of 500 nm to 600 nm, Can be wider than that. This is because the light absorption rate in the wavelength range of 500 nm to 600 nm can be increased to optimize the color reproduction rate.

As described above, according to the present invention, the area of the light-absorbing line can be determined in accordance with the peak wavelength among the wavelength ranges of the light incident from the outside, thereby improving the color reproduction rate.

17 is a perspective view showing an optical sheet according to a seventh embodiment of the present invention.

As shown in FIG. 17, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The light absorbing layer 120 is formed on the transparent support layer 110 and can absorb light of a specific wavelength range in a wavelength range of light incident from the outside.

The light absorbing layer 120 includes a first light absorbing line 120a formed of a first mixed material in which the polymer resin 128 and the first light absorbing material 122 are mixed, a polymeric resin 128 and a second light absorbing material 124, A second light absorbing line 120b made of a mixed second material and a third absorbing line 120c made of a third mixed material in which the polymer resin 128 and the third light absorbing material 126 are mixed . Here, the plurality of first, second, and third light absorbing lines 120a, 120b, and 120c may be sequentially and repeatedly arranged along the longitudinal direction on the surface of the transparent support layer 110.

The number of the first, second and third light absorbing lines 120a, 120b and 120c is larger than that of the first, second and third light absorbing lines 120a, 120b and 120c, Can be the same. Here, the reason why the plurality of light absorbing lines are arranged is that the light transmittance and the color reproduction rate of the optical sheet can be partially controlled. For example, when light of a specific wavelength range is concentrated in a part of the optical sheet, an optical line having an excellent color reproducibility can be provided by disposing an absorption line capable of absorbing light of a specific wavelength band in the region.

18 to 20 are perspective views showing an optical sheet according to an eighth embodiment of the present invention.

18 to 20, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The light absorbing layer 120 is formed on the transparent support layer 110 and can absorb light of a specific wavelength range in a wavelength range of light incident from the outside.

The light absorbing layer 120 includes a first light absorbing line 120a formed of a first mixed material in which the polymer resin 128 and the first light absorbing material 122 are mixed, a polymeric resin 128 and a second light absorbing material 124, A second light absorbing line 120b made of a mixed second material and a third absorbing line 120c made of a third mixed material in which the polymer resin 128 and the third light absorbing material 126 are mixed . Here, the plurality of first, second, and third light absorbing lines 120a, 120b, and 120c may be sequentially and repeatedly arranged along the longitudinal direction on the surface of the transparent support layer 110.

As shown in FIGS. 18 to 20, the first, second and third light absorbing lines 120a, 120b and 120c are respectively plural and the number of the first, second and third light absorbing lines 120a, 120b and 120c May be different from each other. Here, the number of the first, second, and third light absorbing lines 120a, 120b, and 120c may be determined according to the peak wavelength among the wavelength ranges of light incident from the outside.

18, the number of the first light-absorbing lines 120a is larger than the number of the second and third light-absorbing lines 120b and 120c when the peak wavelength is within 300 nm to 400 nm among the wavelength ranges of light incident from the outside Can be many. The reason is that the color reproducibility can be optimized by raising the light absorption rate in the wavelength range of 300 nm to 400 nm.

19, the number of the second light-absorbing lines 120b is set such that the number of the first and third light-absorbing lines 120a and 120c (that is, the number of the first and third light-absorbing lines 120a and 120c), when the peak wavelength is within 400 nm to 500 nm, Can be more. The reason is that the color reproducibility can be optimized by raising the light absorptivity in the wavelength range of 400 nm to 500 nm.

20, the number of the third light-absorbing lines 120c is set such that the number of the first and second light-absorbing lines 120a and 120b, when the peak wavelength is within 500 nm to 600 nm, Can be more. This is because the light absorption rate in the wavelength range of 500 nm to 600 nm can be increased to optimize the color reproduction rate.

As described above, according to the present invention, the number of light-absorbing lines can be determined in accordance with the peak wavelength among the wavelength ranges of light incident from outside, and the color reproduction rate can be improved.

21 is a cross-sectional view showing an optical sheet according to a ninth embodiment of the present invention.

As shown in FIG. 21, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The light absorbing layer 120 is formed on the transparent support layer 110 and can absorb light of a specific wavelength range in a wavelength range of light incident from the outside.

The light absorbing layer 120 includes a first layer 120-1 formed of a first mixed material in which a polymer resin and a first light absorbing material are mixed, a first layer 120-1 laminated on the first layer 120-1, A second layer 120-2 made of a mixed second material and a third layer made of a third mixed material that is laminated on the second layer 120-2 and in which the polymer resin and the third light absorbing material are mixed 120-3).

Here, the thicknesses t1, t2, and t3 of the first, second, and third layers 120-1, 120-2, and 120-3 may be equal to each other. The sum of the thicknesses t1, t2, and t3 of the first, second, and third layers 120-1, 120-2, and 120-3 may be about 2 um to about 5 um.

As described above, according to the present invention, a plurality of light absorbing layers can be laminated to improve color reproducibility and light transmittance and to control them uniformly.

22 to 24 are sectional views showing an optical sheet according to a tenth embodiment of the present invention.

22 to 24, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The light absorbing layer 120 is formed on the transparent support layer 110 and can absorb light of a specific wavelength range in a wavelength range of light incident from the outside.

The light absorbing layer 120 includes a first layer 120-1 formed of a first mixed material in which a polymer resin and a first light absorbing material are mixed, a first layer 120-1 laminated on the first layer 120-1, A second layer 120-2 made of a mixed second material and a third layer made of a third mixed material that is laminated on the second layer 120-2 and in which the polymer resin and the third light absorbing material are mixed 120-3).

Here, the thicknesses t1, t2, and t3 of the first, second, and third layers 120-1, 120-2, and 120-3 may be different from each other. The thicknesses t1, t2, and t3 of the first, second, and third layers 120-1, 120-2, and 120-3 can be determined according to the peak wavelength among the wavelength ranges of light incident from the outside.

As shown in FIG. 22, the thickness t1 of the first layer 120-1 is greater than the thickness t1 of the second and third layers 120-2 and 120-3 when the peak wavelength is within 300 nm to 400 nm, The thicknesses t2 and t3 of the first and second layers may be thicker than the thicknesses t2 and t3. The reason is that the color reproducibility can be optimized by raising the light absorption rate in the wavelength range of 300 nm to 400 nm.

Here, the sum of the thicknesses t1, t2, and t3 of the first, second, and third layers 120-1, 120-2, and 120-3 may be about 2 um to about 5 um.

23, the thickness t2 of the second layer 120-2 is smaller than the thickness t2 of the first and third layers 120-1 and 120-2 when the peak wavelength is within 400 nm to 500 nm, -3). ≪ / RTI > The reason is that the color reproducibility can be optimized by raising the light absorptivity in the wavelength range of 400 nm to 500 nm.

Here, the sum of the thicknesses t1, t2, and t3 of the first, second, and third layers 120-1, 120-2, and 120-3 may be about 2 um to about 5 um.

24, the thickness t3 of the third layer 120-3 is larger than the thickness t3 of the first and second layers 120-1 and 120-2 when the peak wavelength is within the range of 500 nm to 600 nm, -2) of thickness t1, t2. This is because the light absorption rate in the wavelength range of 500 nm to 600 nm can be increased to optimize the color reproduction rate.

Here, the sum of the thicknesses t1, t2, and t3 of the first, second, and third layers 120-1, 120-2, and 120-3 may be about 2 um to about 5 um.

As described above, according to the present invention, the thickness of the light absorbing layer can be determined in accordance with the peak wavelength in the wavelength band of the light incident from outside, and the color reproduction rate can be improved.

25 is a sectional view showing an optical sheet according to an eleventh embodiment of the present invention.

As shown in FIG. 25, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The light absorbing layer 120 is formed on the transparent support layer 110 and can absorb light of a specific wavelength range in a wavelength range of light incident from the outside.

The light absorbing layer 120 includes a first layer 120-1 formed of a first mixed material in which a polymer resin and a first light absorbing material are mixed, a first layer 120-1 laminated on the first layer 120-1, A second layer 120-2 made of a mixed second material and a third layer made of a third mixed material that is laminated on the second layer 120-2 and in which the polymer resin and the third light absorbing material are mixed 120-3). Here, the plurality of first, second, and third layers 120-1, 120-2, and 120-3 may be sequentially and repeatedly stacked on the surface of the transparent support layer 110. [

As shown in FIG. 25, the first, second, and third layers 120-1, 120-2, and 120-3 are a plurality of the first, second, and third layers 120-1 and 120-2 , And 120-3 may be equal to each other. Here, the reason why the plurality of light absorbing layers are laminated is that the light transmittance and the color reproduction ratio of the optical sheet can be uniformly controlled. That is, since the first, second, and third light absorbing materials are uniformly laminated in the thickness direction of the optical sheet, it is possible to provide an optimal optical seek having excellent color reproducibility.

26 to 28 are sectional views showing an optical sheet according to a twelfth embodiment of the present invention.

As shown in FIGS. 26 to 28, the optical sheet 100 of the present invention may include a transparent support layer 110 and a light absorbing layer 120.

The light absorbing layer 120 is formed on the transparent support layer 110 and can absorb light of a specific wavelength range in a wavelength range of light incident from the outside.

The light absorbing layer 120 includes a first layer 120-1 formed of a first mixed material in which a polymer resin and a first light absorbing material are mixed, a first layer 120-1 laminated on the first layer 120-1, A second layer 120-2 made of a mixed second material and a third layer made of a third mixed material that is laminated on the second layer 120-2 and in which the polymer resin and the third light absorbing material are mixed 120-3).

The first, second, and third layers 120-1, 120-2, and 120-3 have a plurality of first, second, and third layers 120-1, 120-2, May be different from each other. Here, the number of the first, second, and third layers 120-1, 120-2, and 120-3 may be determined according to the peak wavelength among the wavelength ranges of light incident from the outside.

The number of the first layers 120-1 is larger than the number of the second and third layers 120-2 and 120-3 when the peak wavelength is within 300 nm to 400 nm among the wavelength ranges of light incident from the outside, Lt; / RTI > The reason is that the color reproducibility can be optimized by raising the light absorption rate in the wavelength range of 300 nm to 400 nm.

27, when the peak wavelength is within 400 nm to 500 nm, the number of the second layers 120-2 is larger than the number of the first and third layers 120-1 and 120- 3). ≪ / RTI > The reason is that the color reproducibility can be optimized by raising the light absorptivity in the wavelength range of 400 nm to 500 nm.

28, the number of the third layers 120-3 is set such that the number of the first and second layers 120-1 and 120- 2). ≪ / RTI > This is because the light absorption rate in the wavelength range of 500 nm to 600 nm can be increased to optimize the color reproduction rate.

As described above, according to the present invention, the number of light absorbing layers can be determined in accordance with the peak wavelength in the wavelength range of the light incident from the outside, and the color reproduction rate can be improved.

29 to 32 are views showing a display device using an optical sheet according to the present invention.

29 to 32, a display device includes an optical sheet 100, a light source module 200, a light guide plate 300, an optical member 400, a display panel 500, and a reflection plate 600. [ . ≪ / RTI >

Here, the light source module 200 may be disposed on the side surface of the light guide plate 300 to illuminate the display panel 500 with light. The light source module 200 may include a substrate having an electrode pattern and a light source disposed on the substrate.

The substrate of the light source module 200 may be a printed circuit board (PCB), a multilayer PCB, a metal PCB (MPCB), a metal core PCB (MCPCB), a flexible PCB (FPCB) . ≪ / RTI > The substrate may be formed of a material that efficiently reflects light, or may be formed of a color whose surface efficiently reflects light, for example, white, silver, or the like. In addition, the substrate may be formed of either one of the reflective coating film and the reflective coating material layer, and may reflect the light generated in the light source toward the optical member 500.

Next, the light source of the light source module 200 may be disposed on the substrate. Here, the light source may be a top view type light emitting diode. In some cases, the light source may be a side view type light emitting diode. The light source may be a LED chip, and the light emitting diode chip may be a blue LED chip or an ultraviolet LED chip or may be a red LED chip, a green LED chip, a blue LED chip, a yellow green LED chip , And a white LED chip may be used.

Further, the light emitting diode chip may have a phosphor. Here, the phosphor may be at least one of a garnet (YAG, TAG), a silicate, a nitride, and an oxynitride. The phosphor may be any one or more of a yellow phosphor, a green phosphor, and a red phosphor. The white LED may be realized by combining a yellow phosphor on a blue LED or by simultaneously using a red phosphor and a green phosphor on a blue LED, (Yellow phosphor), Red phosphor (Phosphor) and Green phosphor (Phosphor).

In addition, the light source of the light source module 200 may be bonded to the LED package on the substrate, or may be directly bonded to the LED chip on the substrate.

The substrate of the light source module 200 may be directly contacted with the heat radiation member. In some cases, a heat radiation pad may be disposed between the substrate of the light source module 200 and the heat radiation member.

Next, the light guide plate 300 may be disposed on the reflection plate 600. [ For example, the light guide plate 300 may be made of glass, acrylic resin such as PMMA (Polymethylmethacrylate), polyethylene terephthalate (PET), cyclic olefin copolymers (COC), polyethylene naphthalate (PEN), polycarbonate (PC) And MS (Mathacylate styrene) resin, but the present invention is not limited thereto.

Then, the optical member 400 may be disposed on the light guide plate 300. The optical member 400 diffuses the light emitted through the light guide plate 300 and may form a concave-convex pattern on the upper surface to increase the diffusion effect. In addition, the optical member 400 may have a plurality of layers, and the concavo-convex pattern may have a top surface or a surface of any one layer. Here, the concavo-convex pattern may have a strip shape arranged along the light source module 200. At this time, the concavo-convex pattern has protrusions on the surface of the optical member, the protrusions comprise a first surface and a second surface facing each other, and an angle between the first surface and the second surface may be an obtuse angle or an acute angle.

Optionally, the optical member 400 is made of at least one sheet, and may optionally include a diffusion sheet, a prism sheet, a brightness enhancement sheet, and the like. Here, the diffusion sheet diffuses the light emitted from the light source, and the prism sheet guides the diffused light to the light emitting area, and the brightness diffusion sheet strengthens the brightness.

In other cases, the optical member 400 may be coated with a milky white coating, which may include a diffusing agent capable of diffusing the light passing through the optical member 400.

The reflective plate 600 may include at least one of a metal or a metal oxide and may be a metal having a high reflectivity such as aluminum (Al), silver (Ag), gold (Au), or titanium dioxide (TiO ₂ ) And may include a metal oxide. The thickness of the reflection plate 600 may be about 100 袖 m to about 300 袖 m, and the reflection plate may be surface-treated with a bid or the like to improve the reflection diffusion function.

On the other hand, the optical sheet 100 can absorb light of a specific wavelength range in the wavelength range of the light incident from the light source module 200. The optical sheet 100 may include a transparent support layer and a light absorbing layer formed on the transparent support layer and absorbing light of a specific wavelength band in a wavelength range of light incident from the outside. Here, the light absorbing layer is formed of a first light absorbing material having an absorption peak with respect to light in the first wavelength band, a second light absorbing substance having an absorption peak with respect to light in the second wavelength band, and a second light absorbing material having an absorption peak with respect to light in the third wavelength band And a third light absorbing material.

The optical sheet 100 may be arranged in various areas, and one or a plurality of the optical sheets 100 may be arranged in the display device.

For example, as shown in Fig. 29, the optical sheet 100 may be disposed between the light guide plate 300 and the optical member 400. Fig.

Optionally, the optical sheet 100 may be disposed between the reflection plate 600 and the light guide plate 300, as shown in Fig.

In other cases, the optical sheet 100 may be disposed between the optical member 400 and the display panel 500, as shown in Fig.

As another example, the optical sheet 100 may be disposed between the light source module 200 and the side surface of the light guide plate 300, as shown in Fig. Here, when the optical sheet 100 is disposed between the light source module 200 and the side surface of the light guide plate 300, the entire thickness of the display device can be reduced.

As described above, the present invention can improve the color reproduction rate by disposing the optical sheet having the light absorbing layer around the light source module and the light guide plate.

33 to 36 are views showing an optical sheet disposed between the light source module and the light guide plate.

33 to 36, the optical sheet 100 may be disposed between the light source module 200 and the side surface of the light guide plate 300. [ When the optical sheet 100 is disposed between the light source module 200 and the side surface of the light guide plate 300, the entire thickness of the display device can be reduced.

33, the optical sheet 100 may be disposed at a second distance d2 from the light source module 200, and may be disposed at a first distance d1 from the side surface of the light guide plate 300. [ The arrangement structure of FIG. 33 has a circuit arrangement space for electrical connection with the light source module 200, so that the circuit arrangement can be convenient.

34, the optical sheet 100 may be directly in contact with the light source module 200 and disposed at a first distance d1 from the side surface of the light guide plate 300, as shown in Fig. The optical sheet 100 may be attached to the light source module 200 with an adhesive 700. 34, the optical sheet 100 and the light source module 200 can be integrally formed, which is economical and can be assembled easily.

35, the optical sheet 100 may be disposed at a second interval d2 from the light source module 200 and directly contact the side surface of the light guide plate 300. In this case, The optical sheet 100 may be attached to the side surface of the light guide plate 300 with an adhesive 700. 35, since the optical sheet 100 is attached to the side surface of the light guide plate 300, light is not lost, so that the light efficiency can be improved.

36, the optical sheet 100 may directly contact one side of the light source module 200 and the other side may directly contact the side surface of the light guide plate 300, as shown in Fig. The optical sheet 100 may be attached to the light source module 200 with a second adhesive 700-2 and may be attached to the side surface of the light guide plate 300 with a first adhesive 700-1. 36, the optical sheet 100 is attached to the side surfaces of the light source module 200 and the light guide plate 300, respectively, so that there is little light loss, and optimal optical efficiency can be obtained. If a reflective film is additionally attached to the outer surfaces of the first and second adhesives 700-1 and 700-2, the light loss that may occur in the first and second adhesives 700-1 and 700-2 And the light efficiency can be further improved by reflecting light to the inside.

37 is a sectional view showing a light guide plate having a light absorbing layer formed thereon.

37, a light absorbing layer 120 may be formed on at least one of the upper surface 301 and the lower surface 302 of the light guide plate 300.

Here, the light absorbing layer 120 includes a first light absorbing material 122 having an absorption peak with respect to light in the first wavelength band, a second light absorbing material 124 having an absorption peak with respect to light in the second wavelength band, And a third light absorbing material 126 having an absorption peak with respect to the light of the wavelength band.

That is, in the present invention, the optical sheet including the light absorbing layer 120 may be attached on the light guide plate 300, but the light absorbing layer 120 may be formed directly on the light guide plate 300 as shown in FIG. In this case, although the thickness of the display device is reduced, the transmissivity and the color gamut of the display device are improved.

As another example, a light absorbing layer may be formed directly on the optical member. That is, a light absorbing layer may be formed on at least one of the upper surface and the lower surface of the optical member. Also in this case, the thickness of the display device is reduced, but the transmittance and the color gamut of the display device are improved.

38 is a sectional view showing a light source module in which a light absorbing layer is formed.

38, the light source module 200 may have a light absorbing layer 120 formed on a light emitting surface.

Here, the light absorbing layer 120 includes a first light absorbing material 122 having an absorption peak with respect to light in the first wavelength band, a second light absorbing material 124 having an absorption peak with respect to light in the second wavelength band, And a third light absorbing material 126 having an absorption peak with respect to the light of the wavelength band.

That is, in the present invention, the light absorbing layer 120 may be directly formed on the light exit surface of the light source module 200. In this case, although the thickness of the display device is reduced, the transmissivity and the color gamut of the display device are improved.

The light source module 200 includes a light source 220 disposed on the substrate 210. The light absorbing layer 120 and the fluorescent layer may be formed directly on the light source 200. [

39 is a graph showing the light transmittance according to the content of the light absorbent in the optical sheet according to the present invention.

As shown in Fig. 39, the light absorbing layer of the optical sheet may have a light absorbing substance content of about 0.005 wt% to about 0.2 wt% based on the polymer resin. This is because if the content of the light absorbing substance is about 0.005 wt% or less based on the polymer resin, the color reproduction rate is lowered, and if the content of the light absorbing substance is about 0.2 wt% or more based on the polymer resin, Because.

Here, when the content of the light absorbing substance is about 0.005 wt%, the light transmittance in the wavelength range of 300 nm - 600 nm is about 90%, the light transmittance in the wavelength range of 300 nm - 600 nm is about 85 %, And when the content of the light absorbing substance is about 0.03 wt%, the light transmittance in the wavelength range of 300 nm - 600 nm is about 84%, and the light transmittance in the wavelength range of 300 nm - It is about 83%.

Therefore, the optical sheet of the present invention is characterized in that it comprises a first light absorbing material having an absorption peak with respect to light of a first wavelength band, a second light absorbing substance having an absorption peak with respect to light of the second wavelength band, It can be seen that the light transmittance is very excellent when the light absorbing layer containing the third light absorbing substance having a peak is formed by appropriately adjusting the light absorbing substance content.

40 is a graph showing the light transmittance according to the thickness of the light absorbing layer of the optical sheet according to the present invention.

As shown in Fig. 40, the light absorbing layer of the optical sheet may have a thickness of about 2 um to about 5 um. The reason is that if the thickness of the light absorbing layer 120 is less than about 2 탆, the color reproduction rate is lowered, and if the thickness of the light absorbing layer 120 is more than about 5 탆, the luminance may be lowered.

Here, when the thickness of the light absorbing layer is about 2 um, the light transmittance is about 85% in the wavelength range of 300 nm - 600 nm when the light transmittance is about 90% in the wavelength range of 300 nm - 600 nm and the thickness of the light absorbing layer is about 4 um, When the thickness of the light absorbing layer is about 5 mu m, it can be seen that the light transmittance in the wavelength range of 300 nm - 600 nm is about 80%.

Therefore, the optical sheet of the present invention is characterized in that it comprises a first light absorbing material having an absorption peak with respect to light of a first wavelength band, a second light absorbing substance having an absorption peak with respect to light of the second wavelength band, It can be seen that the light transmittance is very excellent when the thickness of the light absorbing layer including the third light absorbing material having a peak is appropriately adjusted.

As described above, in the present invention, when the optical sheet having the light absorbing layer is applied to a display device, the color reproduction ratio of the display device is improved as shown in Table 1 below.

Color recall Backlight without optical sheet Backlight with optical sheet Addition of the third light absorbing substance Addition of the first and third light absorbing materials The first, second and third light absorbent additions ATSC 108.3 119.1 123.5 143.4 NTSC 76.7 84.4 87.5 101.5 DCI 89.4 101.5 105.5 118.2

As shown in Table 1, the first, second, and third light absorbing materials were all added as shown in Table 1, wherein the color gamut of the first, second, , It can be seen that the optimum color recall ratio appears.

As described above, the present invention can improve the color reproduction rate by disposing the optical sheet having the light absorbing layer around the light source module and the light guide plate.

The features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects and the like illustrated in the embodiments can be combined and modified by other persons skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

100: Optical sheet
110: transparent support layer
120: absorbing layer
122: a first light absorbing material
124: second light absorbing substance
126: third light absorbing substance
128: polymer resin

Claims (20)

Transparent support layer; And,
And a light absorbing layer formed on the transparent support layer and absorbing light of a specific wavelength band in a wavelength range of light incident from the outside,
The light-
A first light absorbing material having an absorption peak with respect to the light of the first wavelength band, a second light absorbing material having an absorption peak with respect to the light of the second wavelength band, and a third light absorbing material having an absorption peak with respect to the light of the third wavelength band Wherein the optical sheet is a sheet. 2. The organic electroluminescent device according to claim 1,
Wherein the optical sheet is one of PMMA (Polymethylmethacrylate), PET (polyethylene terephthlate), COC (Cyclic Olefin Copolymers), PEN (polyethylene naphthalate), PC (Polycarbonate), PS (Polystyrene) and MS (Mathacylate styrene). The light-emitting device according to claim 1, wherein the first light-
And absorbs light in a wavelength range of 300 nm to 400 nm. The light-emitting device according to claim 1, wherein the second light-
And absorbs light in a wavelength range of 400 nm to 500 nm. The light-emitting device according to claim 1, wherein the third light-
And absorbs light in a wavelength range of 500 nm to 600 nm. The light-emitting device according to claim 1, wherein the first light-
Cyanine < / RTI >
The second light-
Boron Dipyrrin (BODIPY), and Perylene.
The third light-
Wherein the optical sheet is at least one selected from the group consisting of Porphyrin, Porphyrazin, Triazaporphyrin, Phthalocyanin and Diimmonium. The light-emitting device according to claim 1,
And a light absorbing material including the first, second, and third light absorbing materials. The method according to claim 7,
Wherein the optical sheet comprises at least one of acrylic, urethane, carbonate, epoxy, and polyethylene naphthalate. 8. The method according to claim 7, wherein the content of the light-
Based on the polymer resin, 0.005 wt% to 0.2 wt%. 8. The light-emitting device according to claim 7, wherein the thickness of the light-
2 um to 5 um. The light-emitting device according to claim 1,
A first light absorbing line comprising a polymeric resin and a first mixed material in which the first light absorbing material is mixed;
A second light absorbing line made of a second mixed material in which the polymer resin and the second light absorbing material are mixed; And,
And a third light absorbing line comprising a third mixed material in which the polymer resin and the third light absorbing substance are mixed. 12. The light-emitting device according to claim 11, wherein the first, second,
Wherein the transparent support layer is disposed along the longitudinal direction on the surface of the transparent support layer. 12. The method of claim 11, wherein areas of the first, second, and third light-
Wherein the optical sheet is different from the optical sheet. 14. The method of claim 13, wherein areas of the first, second, and third light-
Is determined according to a peak wavelength in a wavelength band of light incident from the outside. 12. The light-emitting device according to claim 11, wherein the first, second,
Respectively,
The number of the first, second, and third light-
Wherein the optical sheet is different from the optical sheet. 16. The method of claim 15, wherein the number of the first, second,
Is determined according to a peak wavelength in a wavelength band of light incident from the outside. The light-emitting device according to claim 1,
A first layer made of a first mixed material in which a polymer resin and the first light absorbing material are mixed;
A second layer formed on the first layer and made of a second mixed material in which the polymer resin and the second light absorbing substance are mixed; And,
And a third layer formed on the second layer and made of a third mixed material in which the polymeric resin and the third light absorbing substance are mixed. 18. The method of claim 17, wherein the thickness of the first, second,
Wherein the optical sheet is different from the optical sheet. 19. The method of claim 18, wherein the thickness of the first, second,
Is determined according to a peak wavelength in a wavelength band of light incident from the outside. A display panel;
A light source module for emitting light to the display panel; And,
And an optical sheet disposed between the light source module and the display panel and absorbing light of a specific wavelength range from a wavelength range of light incident from the light source module,
In the optical sheet,
Transparent support layer; And,
And a light absorbing layer formed on the transparent support layer and absorbing light of a specific wavelength band in a wavelength range of light incident from the outside,
The light-
A first light absorbing material having an absorption peak for light in the first wavelength range, a second light absorbing material having an absorption peak for light in the second wavelength band, and a third light absorbing material having an absorption peak for light in the third wavelength band Wherein the optical sheet is made of a transparent material.

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