Color film substrate and manufacturing method thereof, and display panel

Patent metadata

Field	Value
Publication number	US-11567358-B2
Application number	US-202117355511-A
Country	US
Kind code	B2
Filing date	Jun 23, 2021
Priority date	Oct 29, 2020
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

Provided are a color film substrate and manufacturing method thereof, and a display panel and manufacturing method thereof. The color film substrate is divided into a display region, and a non-display region around a periphery of the display region and including an edge region at an edge of the color film substrate. The color film substrate includes base, color resist layer on the base and black matrix layer on the base at least in the display region. In the edge region, the color resist layer includes first sub color resist layer on the base and second sub color resist layer on the first sub color resist layer, the first sub color resist layer allows light in first wavelength range to transmit therethrough, the second sub color resist layer allows light in a second wavelength range to transmit therethrough, and the first wavelength range does not overlap the second wavelength range.

First claim

The invention claimed is:

1. A color film substrate, the color film substrate being divided into a display region, a non-display region around a periphery of the display region, and a spacing region between the display region and an edge region, the non-display region comprising the edge region located at an edge of the color film substrate, the color film substrate comprising:
a base, a color resist layer on the base and in the display region and the edge region, and a black matrix layer on the base and at least in the display region and the edge region,
wherein in the edge region, the black matrix layer comprises a plurality of black matrix blocks separated from each other, the color resist layer comprises a first sub color resist layer on the base and a second sub color resist layer on the first sub color resist layer, the first and second sub color resist layers completely cover the plurality of black matrix blocks in the edge region and all gaps among the plurality of black matrix blocks in the edge region, the first sub color resist layer allows light of a first wavelength range to transmit therethrough, the second sub color resist layer allows light of a second wavelength range to transmit therethrough, and the first wavelength range does not overlap with the second wavelength range.

2. The color film substrate according to claim 1 , wherein the plurality of black matrix blocks is arranged on the base in the edge region in a mosaic pattern.

3. The color film substrate according to claim 1 , wherein the color resist layer completely fills a gap between any two of the plurality of black matrix blocks.

4. The color film substrate according to claim 3 , wherein an orthogonal projection of the plurality of black matrix blocks on the base is within an orthogonal projection of the color resist layer on the base.

5. The color film substrate according to claim 1 , wherein an orthographic projection of the first color resist layer on the base completely overlaps with an orthographic projection of the second color resist layer on the base.

6. The color film substrate according to claim 1 , wherein a width of the edge region in a direction parallel to the base ranges from 180 μm to 300 μm, and
wherein an interval between any two black matrix blocks of the plurality of black matrix blocks ranges from 10 μm to 15 μm.

7. The color film substrate according to claim 1 , further comprising a planarization layer in the display region and the edge region and on the color resist layer and the black matrix layer.

8. The color film substrate according to claim 1 , wherein
wherein the color resist layer is not in the spacing region, and
wherein the black matrix layer is in the display region, the spacing region, and the edge region.

9. A liquid crystal display panel, comprising the color film substrate of claim 1 , a liquid crystal layer on the base of the color film substrate, and a backlight layer on a side of the liquid crystal layer facing away from the color film substrate.

10. A manufacturing method of a color film substrate, comprising steps of:
providing a base, the base being divided into a display region, a non-display region around a periphery of the display region, and a spacing region between the display region and an edge region, the non-display region comprising the edge region at an edge of the base;
forming a black matrix layer on the base at least in the display region and the edge region through a first process;
forming a first sub color resist layer on the base in the display region and the edge region through a second process;
forming a second sub color resist layer in the display region and the edge region through a third process; and
forming a third sub color-resist layer in the display region through a fourth process,
wherein in the edge region, the black matrix layer comprises a plurality of black matrix blocks separated from each other, the second sub color resist layer is formed on the first sub color resist layer, the first and second sub color resist layers completely cover the plurality of black matrix blocks in the edge region and all gaps among the plurality of black matrix blocks in the edge region, the first sub color resist layer allows light of a first wavelength range to transmit therethrough, the second sub color resist layer allows light of a second wavelength range to transmit therethrough, the third sub color resist layer allows light of a third wavelength range to transmit therethrough, and the first wavelength range, the second wavelength range and the third wavelength range do not overlap with each other.

11. The manufacturing method according to claim 10 , wherein the plurality of black matrix blocks is formed on the base in the edge region in a mosaic pattern.

12. The manufacturing method according to claim 10 , wherein the first sub color resist layer in the edge region completely fills a gap between any two black matrix blocks of the plurality of black matrix blocks.

13. The manufacturing method according to claim 10 , wherein an orthogonal projection of the first sub color resist layer in the edge region on the base completely overlaps with an orthogonal projection of the second sub color resist layer in the edge region on the base.

14. The manufacturing method according to claim 10 ,
wherein the first sub color resist layer, the second sub color resist layer, and the third sub color resist layer are not formed on the base in the spacing region, and
wherein the black matrix layer is formed on the base in the display region, the spacing region, and the edge region.

15. A manufacturing method of a liquid crystal display panel, comprising:
manufacturing a color film substrate according to the manufacturing method according to claim 10 ;
forming a liquid crystal layer on the base of the color film substrate; and
forming a backlight layer on a side of the liquid crystal layer facing away from the color film substrate.

Assignees

• Fuzhou Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Fang Xin
• Chen Jixiang
• Xu Shanshan
• Hu Longgan
• Wang Wenchao
• Wang Jinliang
• Park Sang Jin

Classifications

• G02F1/133514 Primary

  Colour filters · CPC title

• G02F1/133512 Primary

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/133516

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

• G02F1/133388

  with constructional differences between the display region and the peripheral region · CPC title

• G02F1/133351

  Manufacturing of individual cells out of a plurality of cells, e.g. by dicing · CPC title