METHOD FOR MANUFACTURING COLOR FILTER, COLOR FILTER, AND DISPLAY DEVICE

• US 20140118670A1
• Filed: 11/12/2012
• Published: 05/01/2014
• Est. Priority Date: 04/01/2012
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Lu, Jinbo, Zhang, Zhuo
• Granted Patent: US 9,360,713 B2
• Time in Patent Office: Days
• US Class Current: 349/106
• CPC Class Codes: G02B 5/201 in the form of arrays
• CPC Class Codes: G02B 5/22 Absorbing filters G02B5/201 - G02B5/208 take precedence
• 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
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 2203/01 transmissive

Abstract

A method for manufacturing a color filter, the color filter, and a display device. The method for manufacturing the color filter includes: forming multiple transparent columnar objects in a pixel area of a substrate; forming on the substrate having formed thereon the transparent columnar object a black array that encircles to form the pixel area; and forming pixel resin layers in the pixel area, where the transparent columnar objects protrude outwards from the pixel resin layers to serve as columnar spacers. This allows for accurate control of the aperture size and aperture area of pores in the pixel area of the color filter.

Claims

1. A method of manufacturing a color filter, comprising:

forming a plurality of transparent columns in pixel regions of a substrate;

forming a black matrix on the substrate formed with the transparent columns, wherein the black matrix defines the pixel regions; and

forming pixel resin layers in the pixel regions, wherein the transparent columns project from the pixel resin layers and serve as post spacers.

2. The method according to claim 1, further comprising:

forming a transparent conductive layer on the black matrix and the pixel resin layers.

3. The method according to claim 2, further comprising:

forming a transparent protective layer between the black matrix and pixel resin layers, and the transparent conductive layer.

4. The method according to claim 1, wherein said forming a plurality of transparent columns in the pixel regions of a substrate comprises:

forming an aperture mask in the pixel regions of the substrate;

coating transparent resin on the substrate formed with the aperture mask;

removing the transparent resin outside the pixel regions;

curing the transparent resin; and

removing the aperture mask.

5. The method according to claim 4, wherein said forming the aperture mask in the pixel regions of the substrate comprises:

applying a metal foil to the substrate;

removing the metal foil outside the pixel region;

forming the aperture metal oxide mask by two-step anodization process.

6. The method according to claim 4, wherein the metal foil is an aluminum foil.

15. The method according to claim 2, wherein said forming a plurality of transparent columns in the pixel regions of a substrate comprises:

forming an aperture mask in the pixel regions of the substrate;

coating transparent resin on the substrate formed with the aperture mask;

removing the transparent resin outside the pixel regions;

curing the transparent resin; and

removing the aperture mask.

16. The method according to claim 3, wherein said forming a plurality of transparent columns in the pixel regions of a substrate comprises:

forming an aperture mask in the pixel regions of the substrate;

coating transparent resin on the substrate formed with the aperture mask;

removing the transparent resin outside the pixel regions;

curing the transparent resin; and

removing the aperture mask.

7. A color filter, comprising:

a substrate;

a plurality of transparent columns formed in pixel regions of the substrate;

a black matrix formed on the substrate, wherein the black matrix defines the pixel regions; and

pixel resin layers formed in the pixel regions, wherein the transparent columns project from the pixel resin layers and serve as post spacers.

8. The color filter according to claim 7, further comprising:

a transparent conductive layer formed on the black matrix and the pixel resin layers.

9. The color filter according to claim 8, further comprising:

a transparent protective layer formed between the black matrix and pixel resin layers, and the transparent conductive layer.

10. The color filter according to claim 7, wherein each of the transparent columns has a height of 6-15 μ

m.

11. A liquid crystal display panel, comprising:

a color filter according to claim 7.

12. A display device, comprising:

a liquid crystal display panel according to claim 11.

13. The color filter according to claim 8, wherein each of the transparent columns has a height of 6-15 μ

m.

14. The color filter according to claim 9, wherein each of the transparent columns has a height of 6-15 μ

m.