Color film substrate and method for preparing color film substrate, liquid crystal display panel

Patent metadata

Field	Value
Publication number	US-12379623-B2
Application number	US-202218558208-A
Country	US
Kind code	B2
Filing date	Nov 9, 2022
Priority date	Nov 9, 2022
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

A color film substrate includes a base substrate, a black matrix layer, a color-resist layer, a protective layer, and a supporting post layer that are stacked and provided in sequence; the black matrix layer is provided with light-transmitting windows distributed in an array, and the color-resist layer covers each light-transmitting window; the supporting post layer is provided with a supporting post; the color film substrate includes a plurality of different subregions; in at least part of the subregions, the color-resist layer is provided with a partition slot located between rows of light-transmitting windows and exposing the black matrix layer, and an orthographic projection of the supporting post on the base substrate at least partially overlaps with an orthographic projection of the partition slot on the base substrate; in at least two of the subregions, the partition slot is provided with different widths.

First claim

What is claimed is:

1. A color film substrate, comprising a base substrate, a black matrix layer, a color-resist layer, a protective layer, and a supporting post layer that are stacked and provided in sequence; wherein, the black matrix layer is provided with light-transmitting windows distributed in an array, the color-resist layer covers each light-transmitting window, and the supporting post layer is provided with a supporting post;
the color film substrate comprises a plurality of different subregions;
in at least part of the subregions, the color-resist layer is provided with a partition slot located between rows of the light-transmitting windows and exposing the black matrix layer, and an orthographic projection of the supporting post on the base substrate at least partially overlaps with an orthographic projection of the partition slot on the base substrate;
wherein, in at least two of the subregions, the partition slot is provided with different widths, and a width of the partition slot is a size of the partition slot in a column direction.

2. The color film substrate according to claim 1 , wherein, along the column direction, a size between two adjacent light-transmitting windows is a sub-pixel pitch; and, a ratio of the width of the partition slot to the sub-pixel pitch is no more than 90%.

3. The color film substrate according to claim 1 , wherein, along the column direction, a size between two adjacent light-transmitting windows is a sub-pixel pitch;
and, a ratio of the width of the partition slot to the sub-pixel pitch is greater than 10%.

4. The color film substrate according to claim 1 , wherein a difference between an average value of a height of each supporting post in any one of the subregions and an average value of a height of each supporting post in another one of the subregions is no more than 0.12 microns; and
the height of the supporting post refers to a segment difference between a top end surface of the supporting post and a surface of the protective layer away from the base substrate.

5. The color film substrate according to claim 1 , wherein, in at least part of the subregions, a surface of the protective layer away from the base substrate is provided with a recessed region overlapping with the partition slot, and an orthographic projection of the supporting post on the protective layer is located in the recessed region.

6. The color film substrate according to claim 1 , wherein, in any one of the subregions, a number of the supporting post is one or more.

7. The color film substrate according to claim 1 , wherein, in two subregions where widths of the partition slot are different, a top-to-bottom segment difference of the supporting post is larger in a subregion where the width of the partition slot is larger; and
the top-to-bottom segment difference of the supporting post refers to a segment difference between a top end surface of the supporting post and a bottom end surface of the supporting post.

8. A liquid crystal display panel, comprising a color film substrate, and a driving substrate provided in a box opposite to the color film substrate;
wherein the color film substrate comprises a base substrate, a black matrix layer, a color-resist layer, a protective layer, and a supporting post layer that are stacked and provided in sequence; wherein, the black matrix layer is provided with light-transmitting windows distributed in an array, the color-resist layer covers each light-transmitting window, and the supporting post layer is provided with a supporting post;
the color film substrate comprises a plurality of different subregions;
in at least part of the subregions, the color-resist layer is provided with a partition slot located between rows of the light-transmitting windows and exposing the black matrix layer, and an orthographic projection of the supporting post on the base substrate at least partially overlaps with an orthographic projection of the partition slot on the base substrate;
wherein, in at least two of the subregions, the partition slot is provided with different widths, and a width of the partition slot is a size of the partition slot in a column direction.

9. A method for preparing a color film substrate, the color film substrate comprising a base substrate, a black matrix layer, a color-resist layer, a protective layer, and a supporting post layer that are stacked and provided in sequence; wherein, the black matrix layer is provided with light-transmitting windows distributed in an array, the color-resist layer covers each light-transmitting window, and the supporting post layer is provided with a supporting post;
the color film substrate comprises a plurality of different subregions; in at least part of the subregions, the color-resist layer is provided with a partition slot located between rows of the light-transmitting windows and exposing the black matrix layer, and an orthographic projection of the supporting post on the base substrate at least partially overlaps with an orthographic projection of the partition slot on the base substrate;
the method for preparing the color film substrate comprises:
preparing a test color film substrate;
obtaining an average value of a supporting post height of at least one subregion of the test color film substrate;
obtaining correction relationship information, the correction relationship information comprising a mapping relationship between a relevant parameter of a partition slot width and a relevant parameter of the supporting post height;
determining a target value of the relevant parameter of the partition slot width of the subregion according to the relevant parameter of the partition slot width and the average value of the supporting post height of the at least one subregion of the test color film substrate, a target value of the supporting post height and the correction relationship information; and
preparing a target color film substrate according to a target value of the relevant parameter of the partition slot width of each subregion.

10. The method for preparing the color film substrate according to claim 9 ,
wherein, determining a target value of the relevant parameter of the partition slot width of the subregion according to the relevant parameter of the partition slot width of the at least one subregion of the test color film substrate, the average value of the supporting post height, a target value of the supporting post height, and the correction relationship information comprises:
determining, according to an average value of the supporting post height of a subregion of the test color film substrate and a target value of the supporting post height of the subregion, a compensation parameter of the supporting post height of the subregion;
determining, according to a relevant parameter of the partition slot width of the subregion of the test color film substrate and the correction relationship information, a relevant parameter of the supporting post height corresponding to the relevant parameter of the partition slot width of the subregion, and taking the determined relevant parameter of the supporting post height as a basic parameter of the supporting post height of the subregion;
determining, according to the basic parameter of the supporting post height of the subregion and the compensation parameter of the supporting post height of the subregion, a correction parameter of the supporting post height of the subregion; and
determining, according to the correction parameter of the supporting post height of the subregion and the correction relationship information, a relevant parameter of the partition slot width corresponding to the correction parameter of the supporting post height, and taking the d

Assignees

• Ordos Yuansheng Optoelectronics Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Shi Zhen
• Xie Jianyun
• Fang Yezhou
• Wang Fengguo
• Li Yongsheng
• Wang Bo
• Yu Guojiang
• Zhang Shilong
• Miao Wei
• Gao Lei

Classifications

• G02F1/133512

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

• G02F1/13394

  spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence) · CPC title

• G02F1/1335

  Structural association of cells with optical devices, e.g. polarisers or reflectors · CPC title

• G09G3/34

  by control of light from an independent source · CPC title

• G02F1/133516 Primary

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