COLOR FILTER SUBSTRATE AND MANUFACTURING METHOD THEREOF, AND DISPLAY DEVICE

• US 20180113357A1
• Filed: 10/19/2017
• Published: 04/26/2018
• Est. Priority Date: 10/20/2016
• Status: Abandoned Application

• Current Assignee: BOE Technology Group Co., Ltd., Chongqing BOE Optoelectronics Technology Co., Ltd. (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd., Chongqing BOE Optoelectronics Technology Co., Ltd. (BOE Technology Group Co., Ltd.)
• Inventors: HAN, Zili, WU, Hongjiang, PANG, Jiaqi, ZHA, Changjun, XIONG, Qiang, LI, Min
• Application Number:
  US15/788,526
• Publication Number:
  US 20180113357A1
• Time in Patent Office: Days
• CPC Class Codes: G02B 5/201 in the form of arrays
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133516 Methods for their manufacture, e.g. printing, electro-deposition or photolithography

Abstract

The present disclosure provides a color filter substrate and a manufacturing method thereof, and a display device. The color filter substrate comprises a plurality of pixel regions and a matrix provided between every two adjacent pixel regions, the pixel region comprises a color filter layer and the color filter layer and the matrix are partially overlapped. Wherein, a height compensation part is provided above the color filter layer, and a top surface of the height compensation part is configured to be planar so as to compensate for unevenness of a surface of the color filter layer.

Claims

1. A color filter substrate, comprising a plurality of pixel regions and a matrix provided between every two adjacent pixel regions, the pixel region comprises a color filter layer, and the color filter layer and the matrix are partially overlapped, wherein, a height compensation part is provided above the color filter layer, and a top surface of the height compensation part is configured to be planar so as to compensate for unevenness of a surface of the color filter layer.

2. The color filter substrate of claim 1, further comprising s base substrate, wherein an area of the height compensation part in the orthographical projection direction relative to the base substrate is smaller than or equal to that of the pixel region.

3. The color filter substrate of claim 1, wherein the height compensation part is directly formed on the color filter layer, a bottom of the height compensation part has a shape which is adaptive to that of an upper surface of the color filter layer, and a height of an upper surface of the height compensation part is not larger than a largest height of the color filter layer.

4. The color filter substrate of claim 3, wherein the color filter layer has a shape corresponding to a boundary of the pixel region, and the height compensation part has a largest thickness at a center line of the pixel region and has a diminishing thickness from the center line towards two sides.

5. The color filter substrate of claim 4, wherein the boundary of the pixel region is rectangular, and the height compensation part has the largest thickness at the center line of the pixel region extending along a long side of the pixel region and has the diminishing thickness from the center line towards two sides.

6. The color filter substrate of claim 5, wherein the height compensation part has the largest thickness of 0.1 μ

m.

7. The color filter substrate of claim 1, further comprising a protection layer formed on the color filter layer, the height compensation part is directly provided on the protection layer, a bottom of the height compensation part has a shape which is adaptive to that of an upper surface of the protection layer, and a height of the upper surface of the height compensation part is not larger than a largest height of the protection layer.

8. The color filter substrate of claim 7, wherein the color filter layer has a shape corresponding to a boundary of the pixel region, and the height compensation part has a largest thickness at a center line of the pixel region and has a diminishing thickness from the center line towards two sides.

9. The color filter substrate of claim 8, wherein the boundary of the pixel region is rectangular, and the height compensation part has the largest thickness at the center line of the pixel region extending along a long side of the pixel region and has the diminishing thickness from the center line towards two sides.

10. The color filter substrate of claim 9, wherein the height compensation part has the largest thickness of 0.5 μ

m.

11. The color filter substrate of claim 1, further comprising at least one spacer which is provided on the height compensation part, wherein a height of the height compensation part is smaller than that of the spacer, and the height compensation part and the spacer are made of a same material.

12. The color filter substrate of claim 1, wherein the height compensation part is made of a transparent material.

13. The color filter substrate of claim 12, wherein the transparent material is a resin material.

14. A manufacturing method of the color filter substrate of claim 1, comprising:

forming the black matrix between every two adjacent pixel regions, and forming the color filter layer at the pixel region, wherein the manufacturing method of the color filter substrate further comprises;

forming the height compensation part above the color filter layer such that the tope surface of the height compensation part is configured to be planar so as to compensate for unevenness of a surface of the color filter layer.

15. The manufacturing method of the color filter layer of claim 14, wherein forming the height compensation part above the color filter layer comprises:

forming the height compensation part directly on the color filter layer, such that a bottom of the height compensation part has a shape which is adaptive to an upper surface of the color filter layer, and a height of an upper surface of the height compensation part is not larger than a largest height of the color filter layer.

16. The manufacturing method of the color filter substrate of claim 14, wherein forming the height compensation part above the color filter layer comprises:

forming a protection layer on the color filter layer and forming the height compensation layer on the protection layer, such that a bottom of the height compensation part has a shape which is adaptive to an upper surface of the protection layer, and a height of an upper surface of the height compensation part is not larger than a largest height of the protection layer.

17. The manufacturing method of the color filter of claim 14, further comprising:

forming at least one spacer, wherein the height compensation part and the at least one spacer are formed in a single patterning process with a same mask plate, and a part of the mask plate for forming the spacer has a light transmission rate of A %, 0<

A <

100, and a part of the mask plate for forming the height compensation part has a light transmission rate of B %, 0<

B<

A, and other parts of the mask plate are non-transparent.

18. The manufacturing method of the color filter substrate of claim 17, wherein the part of the mask plate for forming the height compensation part has the light transmission rate of B% at a center line extending along a long side of the pixel region, and has a diminishing light transmission rate from the center line towards two sides.

19. The manufacturing method of color filter substrate of claim 17, wherein the part of the mask plate for forming the height compensation part has the light transmission rate of B (x) %=B %×

k^x/d×

(1-2x/d)ⁿ, wherein d is a width of a transparent region, x is a distance from a center line of the transparent region, 0≤

x<

d, and n and k are factors associated with properties of production line and photoresist.

20. A display device, comprising the color filter substrate of claim 1.