Color filter and display device

Abstract

The utility model relates to the technical field of display, in particular to a color filter and a display device. The color filter comprises a substrate and a plurality of sub-pixels, the sub-pixels are arranged on the surface of the substrate at intervals in an array mode, and at least one sub-pixel comprises a first sub-pixel and a second sub-pixel. The second sub-pixel is located between the first sub-pixel and another sub-pixel adjacent to the at least one sub-pixel, and the height of the first sub-pixel based on the surface is higher than the height of the second sub-pixel based on the surface. According to the color filter provided by the invention, the transmittance can be improved, and the color gamut can be ensured.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and in particular, to a color filter and a display device. Background Art

[0002] In a color filter film, a pixel unit includes sub-pixels of three colors: red (R), green (G), and blue (B). By adjusting the gray values corresponding to the three color sub-pixels, the color and brightness displayed by the color filter film can be controlled. In order to improve the color gamut of the panel, the thickness of the color filter film is usually increased. However, the increase in the thickness of the color filter film will reduce the transmittance, and the decrease in the transmittance is greater than the increase in the color gamut. Summary of the Invention

[0003] The present disclosure provides a color filter and a display device to at least solve the above technical problems existing in the prior art.

[0004] In a first aspect of the present disclosure, a color filter is provided, including:

[0005] A substrate:

[0006] A plurality of sub-pixels, arranged at intervals and in an array on the surface of the substrate, where at least one sub-pixel includes a first sub-pixel and a second sub-pixel, the second sub-pixel is located between the first sub-pixel and another sub-pixel adjacent to the at least one sub-pixel, and the height of the first sub-pixel based on the surface is higher than the height of the second sub-pixel based on the surface.

[0007] Further, the at least one sub-pixel further includes a third sub-pixel, the first sub-pixel is located between the second sub-pixel and the third sub-pixel, and the height of the first sub-pixel based on the surface is higher than the height of the third sub-pixel based on the surface.

[0008] Further, the first sub-pixel, the second sub-pixel, and the third sub-pixel are arranged in an interval array, the first sub-pixel is located at the middle position of the region where the sub-pixel where the first sub-pixel is located is located, and the second sub-pixel and the third sub-pixel are symmetric about the first sub-pixel.

[0009] Further, the height H1 of the first sub-pixel satisfies: 0.8μm ≤ H1 ≤ 2.3μm;

[0010] And / or, the height H2 of the second sub-pixel satisfies: 0.2μm ≤ H2 ≤ 0.8μm, and the height H3 of the third sub-pixel satisfies: 0.2μm ≤ H3 ≤ 0.8μm.

[0011] Further, the height H1 of the first sub-pixel and the height H2 of the second sub-pixel satisfy; H2 / H1 ≤ 1 / 2.

[0012] Further, the multiple sub-pixels include adjacent first and second sub-pixels. The first sub-pixel among the first sub-pixels includes a first transmissive layer and a second transmissive layer, and the first transmissive layer is located between the surface of the substrate and the second transmissive layer.

[0013] The first sub-pixel among the second sub-pixels includes a third transmissive layer and a fourth transmissive layer, and the third transmissive layer is located between the surface of the substrate and the fourth transmissive layer.

[0014] Wherein, the first transmissive layer and the third transmissive layer are made of the same material and have the same thickness.

[0015] Further, the refractive index of the first transmissive layer is the same as that of the second transmissive layer, and the refractive index of the third transmissive layer is the same as that of the fourth transmissive layer.

[0016] Further, the sub-pixel includes multiple sub-pixels, and the surfaces of the multiple sub-pixels away from the substrate are located on the same spherical surface.

[0017] A second aspect of the present disclosure provides a color filter, including:

[0018] A substrate;

[0019] Multiple sub-pixels are disposed on the surface of the substrate. Along a direction perpendicular to and away from the surface, the area of the figure obtained by intercepting at least one of the sub-pixels with a plane parallel to the surface gradually decreases.

[0020] A third aspect of the present disclosure provides a display device, including the color filter according to the first aspect or the second aspect.

[0021] The technical solution provided by the embodiments of the present disclosure has the following advantages compared with the prior art:

[0022] In the color filter provided by the embodiments of the present disclosure, at least one sub-pixel includes a first sub-pixel and a second sub-pixel. The second sub-pixel is located between the first sub-pixel and another sub-pixel adjacent to at least one sub-pixel. Among them, the height of the first sub-pixel based on the surface is higher than the height of the second sub-pixel based on the surface. Overall, it can play a role in reducing the film thickness and improving the transmittance. The height of the first sub-pixel based on the surface is higher than the height of the second sub-pixel based on the surface, making the sub-pixel show a trend of being high in the middle and low at the edges, increasing the path length of the light traveling in the color resist layer, thereby improving the color gamut. This design can not only improve the transmittance but also ensure the color gamut.

[0023] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become readily understood from the following description. Brief Description of the Drawings

[0024] By referring to the accompanying drawings and reading the following detailed description, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become readily understandable. In the drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, wherein:

[0025] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0026] Figure 1 A schematic structural diagram of a color filter provided by the first embodiment of the present disclosure is shown;

[0027] Figure 2 A schematic cross-sectional structural diagram of a color filter provided by the first embodiment of the present disclosure is shown;

[0028] Figure 3 A schematic structural diagram of a color filter provided by the second embodiment of the present disclosure is shown;

[0029] Figure 4 A schematic cross-sectional structural diagram of a color filter provided by the second embodiment of the present disclosure is shown;

[0030] Figure 5 A schematic cross-sectional structural diagram of a color filter provided by the third embodiment of the present disclosure is shown;

[0031] Figure 6 A schematic cross-sectional structural diagram of a color filter provided by the fourth embodiment of the present disclosure is shown.

[0032] Description of the reference numerals in the figure: 1. Substrate; 2. Sub-pixel; 21. First sub-pixel; 211. First transmissive layer; 212. Second transmissive layer; 213. Third transmissive layer; 214. Fourth transmissive layer; 22. Second sub-pixel; 23. Third sub-pixel. Detailed Embodiments

[0033] To make the objectives, features, and advantages of the present disclosure more obvious and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0034] Combined with Figure 1 andFigure 2 As shown, the color filter provided by the embodiment of the present disclosure includes a substrate 1 and a plurality of sub-pixels 2. The substrate 1 can be made of highly transparent Glass or PET material, with a refractive index of 1.51 nm / RIU. Pixels are arranged on the upper layer of the substrate 1, and a pixel is the basic unit that constitutes an image.

[0035] In a predetermined number of pixel units that are continuous in the row direction and the column direction, the color configurations of the plurality of sub-pixels 2 are periodically repeated. Optionally, the combination of the colors of the plurality of sub-pixels 2 is a combination of red (R), green (G), and blue (B), and the sub-pixel 2 regions of the same color are not arranged adjacent to each other.

[0036] The plurality of sub-pixels 2 are spaced apart and arranged in an array on the surface of the substrate 1, and at least one of the plurality of sub-pixels 2 includes a plurality of sub-pixels. Each pixel can be divided into several sub-pixels 2 while ensuring that the total aperture ratio remains unchanged (the aperture ratio is between 40% and 60%), and the lights emitted by the plurality of sub-pixels in the same sub-pixel 2 have the same color.

[0037] Among them, at least one sub-pixel 2 includes a first sub-pixel 21 and a second sub-pixel 22. The second sub-pixel 22 is located between the first sub-pixel 21 and another sub-pixel 2 adjacent to at least one sub-pixel 2. Among them, the height of the first sub-pixel 21 based on the surface is higher than the height of the second sub-pixel 22 based on the surface, which can play a role in reducing the film thickness and improve the transmittance. The height of the first sub-pixel 21 based on the surface is higher than the height of the second sub-pixel 22 based on the surface, making the sub-pixel 2 tend to be high in the middle and low at the edges, increasing the path length of the light traveling in the color resist layer, thereby improving the color gamut. This design can both improve the transmittance and ensure the color gamut.

[0038] In some specific embodiments, at least one sub-pixel 2 further includes a third sub-pixel 23. The first sub-pixel 21 is located between the second sub-pixel 22 and the third sub-pixel 23, and the height of the first sub-pixel 21 based on the surface is higher than the height of the third sub-pixel 23 based on the surface, making the sub-pixel 2 tend to be high in the middle and low at the edges. This design can both improve the transmittance and ensure the color gamut.

[0039] As Figure 1 shown, each sub-pixel 2 is composed of 9 square (3*3) sub-pixels. The height of the sub-pixels shows a trend of being high in the middle and low at both sides. The heights of the left and right 2 sub-pixels among the 3 sub-pixels in the same row are the same. The sub-pixel 2 is shaped like an arc as a whole. Such a design can both improve the transmittance and ensure the color gamut.

[0040] Optionally, the first sub-pixel 21, the second sub-pixel 22, and the third sub-pixel 23 can be arranged adjacent to each other. Optionally, other pixels can also be arranged between the first sub-pixel 21 and the second sub-pixel 22, and between the second sub-pixel 22 and the third sub-pixel 23.

[0041] Optionally, at least one sub-pixel 2 further includes a fourth sub-pixel, a fifth sub-pixel, a sixth sub-pixel...

[0042] In some specific embodiments, the first sub-pixel 21, the second sub-pixel 22, and the third sub-pixel 23 are arranged in an interval array. The first sub-pixel 21 is located at the middle position of the region where the sub-pixel 2 where the first sub-pixel 21 is located. The second sub-pixel 22 and the third sub-pixel 23 are symmetric about the first sub-pixel 21, which can not only improve the transmittance but also ensure the color gamut.

[0043] In some specific embodiments, the height H1 of the first sub-pixel 21 satisfies: 0.8μm ≤ H1 ≤ 2.3μm; and / or, the height H2 of the second sub-pixel 22 satisfies: 0.2μm ≤ H2 ≤ 0.8μm, and the height H3 of the third sub-pixel 23 satisfies: 0.2μm ≤ H3 ≤ 0.8μm, making the sub-pixel 2 overall in a shape similar to an arc, which can not only improve the transmittance but also ensure the color gamut.

[0044] In some specific embodiments, the height H1 of the first sub-pixel 21 and the height H2 of the second sub-pixel 22 satisfy; H2 / H1 ≤ 1 / 2. The height range of the middle first sub-pixel 21 is 0.8 - 2.3um, and the height ranges of the second sub-pixel 22 and the third sub-pixel 23 on the left and right are 0.2 - 0.8um, making the sub-pixel 2 overall in a shape similar to an arc. The color resistance layer formed by the sub-pixel 2 with an arc structure can achieve the effect of reducing the film thickness, thereby improving the transmittance. At the same time, when light enters the color resistance layer, refraction occurs, and the arc structure can make the path of light traveling in the color resistance layer longer, thereby improving the color gamut. That is, such a design can both improve the transmittance and ensure the color gamut design.

[0045] In some specific embodiments, the surface of the first sub-pixel 21 away from the substrate is spherical; in some specific embodiments, the surface of the second sub-pixel 22 away from the substrate is arc-shaped.

[0046] Combined Figure 3 and Figure 4As shown, a plurality of sub-pixels 2 include adjacent first sub-pixels 2 and second sub-pixels 2. The first sub-pixel 21 in the first sub-pixel 2 includes a first transmissive layer 211 and a second transmissive layer 212, and the first transmissive layer 211 is located between the surface of the substrate 1 and the second transmissive layer 212; the first sub-pixel 21 in the second sub-pixel 2 includes a third transmissive layer 213 and a fourth transmissive layer 214, and the third transmissive layer 213 is located between the surface of the substrate 1 and the fourth transmissive layer 214; wherein, the first transmissive layer 211 and the third transmissive layer 213 are made of the same material and have the same thickness. During processing, the first transmissive layer 211 and the third transmissive layer 213 can be set at corresponding positions on the substrate 1, and then a photolithography process can be performed, which can reduce the number of photolithography processes. The first transmissive layer 211 and the third transmissive layer 213 can be high-transmittance OC materials.

[0047] In some specific embodiments, the refractive index of the first transmissive layer 211 is the same as that of the second transmissive layer 212, and the refractive index of the third transmissive layer 213 is the same as that of the fourth transmissive layer 214, which can reduce the number of photolithography processes.

[0048] In some specific embodiments, the sub-pixel 2 includes a plurality of sub-pixels, and the plurality of sub-pixels are located on the same spherical surface away from the surface of the substrate 1. The color resist layer formed by the sub-pixels 2 can achieve the effect of reducing the film thickness, thereby improving the transmittance. At the same time, when light enters the color resist layer, refraction occurs, and the spherical structure can make the path of light traveling in the color resist layer longer, thereby improving the color gamut.

[0049] Combined Figure 5 and Figure 6 As shown, the color filter provided by the embodiment of the present disclosure includes: a substrate 1 and a plurality of sub-pixels 2, and the plurality of sub-pixels 2 are disposed on the surface of the substrate 1. Among them, along the direction perpendicular to the surface and away from the surface, the area of the graph intercepted by at least one sub-pixel 2 by a plane parallel to the surface gradually decreases, so that the sub-pixel 2 away from the surface of the substrate is in an arc structure. The color resist layer formed by the sub-pixels 2 in the arc structure can achieve the effect of reducing the film thickness, thereby improving the transmittance. At the same time, when light enters the color resist layer, refraction occurs, and the arc structure can make the path of light traveling in the color resist layer longer, thereby improving the color gamut.

[0050] It can be understood that, in order to better illustrate the structure of the sub-pixel 2, Figure 5 Figure 6 only a few sub-pixels 2 are exemplarily shown in

[0051] In this embodiment, the arc structure of sub-pixel 2 is specifically as follows: for any point on the surface of the sub-pixel along the direction perpendicular to and away from the surface of the substrate. The slope of the arc surface first gradually increases and then gradually decreases. This arc design helps to balance the light-emitting direction of sub-pixel 2, and ultimately achieves a balance between the transmittance and the color gamut effect.

[0052] The display device provided by the embodiment of the present disclosure includes the color filter provided by the embodiment of the present disclosure. Since the display device provided by the embodiment of the present disclosure and the color filter provided by the embodiment of the present disclosure have the same advantages, they will not be elaborated here.

[0053] It should be understood that various forms of the processes shown above can be used, steps can be reordered, added or deleted. For example, the steps described in the present disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in the present application can be achieved. No limitations are imposed herein.

[0054] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present disclosure, "a plurality" means two or more unless otherwise specifically defined.

[0055] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A color filter, characterized in that: include: Substrate substrate (1): A plurality of sub-pixels (2) are arranged in an array at intervals on the surface of the substrate (1), wherein at least one sub-pixel (2) comprises a first sub-pixel (21) and a second sub-pixel (22), and the second sub-pixel (22) is located between the first sub-pixel (21) and another sub-pixel (2) adjacent to the at least one sub-pixel (2), wherein the height of the first sub-pixel (21) based on the surface is higher than the height of the second sub-pixel (22) based on the surface.

2. The color filter according to claim 1, characterized in that: The at least one sub-pixel (2) further comprises a third sub-pixel (23), the first sub-pixel (21) being located between the second sub-pixel (22) and the third sub-pixel (23), and the height of the first sub-pixel (21) based on the surface being higher than the height of the third sub-pixel (23) based on the surface.

3. The color filter according to claim 2, characterized in that: The first sub-pixel (21), the second sub-pixel (22) and the third sub-pixel (23) are arranged in an array at intervals, the first sub-pixel (21) is located in the middle of the area where the sub-pixel (2) where the first sub-pixel (21) is located, and the second sub-pixel (22) and the third sub-pixel (23) are symmetrical with respect to the first sub-pixel (21).

4. The color filter according to claim 2, characterized in that: The height H1 of the first sub-pixel (21) satisfies: 0.8 μm≤H1≤2.3 μm; And / or, the height H2 of the second sub-pixel (22) satisfies: 0.2 μm≤H2≤0.8 μm, and the height H3 of the third sub-pixel (23) satisfies: 0.2 μm≤H3≤0.8 μm.

5. The color filter according to claim 2, characterized in that: A height H1 of the first sub-pixel (21) and a height H2 of the second sub-pixel (22) satisfy: H2 / H1≤1 / 2.

6. The color filter according to claim 2, characterized in that: The plurality of sub-pixels (2) include adjacent first sub-pixels (2) and second sub-pixels (2); a first sub-pixel (21) in the first sub-pixel (2) includes a first transmission layer (211) and a second transmission layer (212); the first transmission layer (211) is located between the surface of the base substrate (1) and the second transmission layer (212); The first sub-pixel (21) in the second sub-pixel (2) comprises a third transmission layer (213) and a fourth transmission layer (214), wherein the third transmission layer (213) is located between the surface of the base substrate (1) and the fourth transmission layer (214); The first transmission layer (211) and the third transmission layer (213) are made of the same material, and the first transmission layer (211) and the third transmission layer (213) are of the same thickness.

7. The color filter according to claim 6, characterized in that: The refractive index of the first transmission layer (211) is the same as the refractive index of the second transmission layer (212), and the refractive index of the third transmission layer (213) is the same as the refractive index of the fourth transmission layer (214).

8. The color filter according to claim 1, characterized in that: The sub-pixel (2) comprises a plurality of sub-pixels, and the surfaces of the plurality of sub-pixels away from the substrate (1) are located on the same spherical surface.

9. A color filter, characterized in that: include: A substrate base plate (1); A plurality of sub-pixels (2) are arranged on the surface of the substrate (1), wherein the area of ​​a figure of at least one of the sub-pixels (2) cut by a plane parallel to the surface gradually decreases in a direction perpendicular to the surface and away from the surface.

10. A display device, characterized in that: The color filter comprises the color filter according to any one of claims 1 to 8, or the color filter according to claim 9.

Images