Method for manufacturing color filter, color filter, and display device

Patent metadata

Field	Value
Publication number	US-9568820-B2
Application number	US-201514890832-A
Country	US
Kind code	B2
Filing date	May 21, 2015
Priority date	Nov 28, 2014
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A method for manufacturing color filter, a color filter, and a display device including the color filter are disclosed. The method for manufacturing a color filter includes: forming a black matrix on a transparent substrate; forming a photosensitive resist layer on the transparent substrate with the black matrix; disposing a reflection sheet capable of reflecting light on a first side of the transparent substrate to be exposed, the first side being provided with the black matrix; disposing a mask on a second side of the transparent substrate to be exposed, the second side being not provided with the black matrix; and carrying out an exposing process from the second side of the transparent substrate.

First claim

What is claimed is:

1. A method for manufacturing a color filter, comprising:
forming a black matrix on a transparent substrate;
forming a photosensitive resist layer on the transparent substrate with the black matrix;
disposing a reflection sheet, capable of reflecting light, on a first side of the transparent substrate, the first side being provided with the black matrix;
disposing a mask on a second side of the transparent substrate to be exposed, the second side being not provided with the black matrix; and
carrying out an exposing process from the second side of the transparent substrate.

2. The method for manufacturing the color filter according to claim 1 , wherein a surface of the reflection sheet facing a light source for the exposing process is a plane surface.

3. The method for manufacturing the color filter according to claim 1 , wherein a surface of the reflection sheet facing a light source for the exposing process is a curved surface.

4. The method for manufacturing the color filter according to claim 3 , wherein the curved surface is a V-shaped surface comprising a plurality of V-shaped grooves disposed side by side along a same direction, or an S-shaped surface with an S-shaped section.

5. The method for manufacturing the color filter according to claim 4 , wherein the V-shaped grooves have a same size and height, and an interval between two adjacent V-shaped grooves is less than or equal to a width of a sub-pixel.

6. The method for manufacturing the color filter according to claim 5 , wherein an interval between two adjacent V-shaped grooves is greater than 0, and a surface within the interval s a plane.

7. The method for manufacturing the color filter according to claim 5 , wherein the interval between two adjacent V-shaped grooves is equal to a line width of the black matrix in the direction of source/drain electrodes.

8. The method for manufacturing a color filter according to claim 5 , wherein a top angel of each V-shaped groove is between about 174 degree and about 180 degree.

9. The method for manufacturing the color filter according to claim 4 , wherein a top angle of each V-shaped groove is in the range of from about 168 degree to about 180 degree.

10. The method for manufacturing the color filter according to claim 4 , wherein each S-shape in the S-shaped surface has a same size, and an interval between vertexes of two adjacent S-shapes is less than or equal to a width of a sub-pixel.

11. The method for manufacturing the color filter according to claim 4 , wherein an angle between a tangent at a vertex of a S-shape and a horizontal direction is greater than 0 degree and less than about 6 degree.

12. The method for manufacturing the color filter according to claim 4 , wherein a trough of each V-shaped groove is located at a central of a sub-pixel.

13. The method for manufacturing the color filter according to claim 4 , wherein a width L of each V-shaped groove is less than or equal to a width of a sub-pixel.

14. The method for manufacturing the color filter according to claim 1 , wherein an distance between the reflection sheet and the transparent substrate is about 100 to about 500 μm.

15. The method for manufacturing the color filter according to claim 14 , wherein an distance between the reflection sheet and the transparent substrate is in the range of from about 100 μm to about 300 μm.

16. The method for manufacturing the color filter according to claim 1 , further comprising forming color layers on the first side of the transparent substrate, after the exposing process.

17. The method for manufacturing the color filter according to claim 1 , further comprising one or more of following steps:
forming color layers;
forming a planarization layer on the transparent substrate after forming the color layers;
forming a transparent conductive layer on the transparent substrate after forming the color layers; and
forming a spacer layer.

18. A color filter, wherein the color filter is manufactured by the method for manufacturing the color filter according to claim 1 .

19. A display device, comprising the color filter according to claim 18 .

20. The display device according to claim 19 , wherein the display device is a liquid crystal panel, an electronic paper, an organic light-emitting diode panel, a liquid crystal TV, a liquid crystal display, a digital picture frame, a cell phone, or a tablet computer, or a component thereof, having a display function.

Assignees

• Boe Technology Group Co Ltd
• Chengdu Boe Optoelect Tech Co

Inventors

• Long Qingde
• Ren Jiawei
• Li Danhui
• Gao Bin
• Zhao Degang
• Zhang Zhiyong
• Chen Yi
• Fu Changyu
• Bai Xuejie

Classifications

• G03F7/0007 Primary

  Filters, e.g. additive colour filters; Components for display devices · CPC title

• G02F1/133516

  Methods for their manufacture, e.g. printing, electro-deposition or photolithography · CPC title

• G03F7/2008

  characterised by the reflectors, diffusers, light or heat filtering means or anti-reflective means used · CPC title

• G03F7/2022

  Multi-step exposure, e.g. hybrid; backside exposure; blanket exposure, e.g. for image reversal; edge exposure, e.g. for edge bead removal; corrective exposure · CPC title

• G02B5/201

  in the form of arrays · CPC title