Color filter substrate and manufacturing method for the same, and display device

Patent metadata

Field	Value
Publication number	US-9939567-B2
Application number	US-201414548829-A
Country	US
Kind code	B2
Filing date	Nov 20, 2014
Priority date	Aug 22, 2014
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

Embodiments of the invention provide a color filter substrate and a manufacturing method for the same, and a display device. The color filter substrate comprises a plurality of spacers. The spacer has a cross-sectional shape in a direction parallel to the color filter substrate, and the cross-sectional shape including a first supporting portion extending along a first direction and a second supporting portion extending along a second direction, which is connected to an end portion of the first supporting portion, the first direction being perpendicular to the second direction.

First claim

What is claimed is:

1. A color filter substrate, comprising a plurality of spacers, wherein, at least one of the spacers has a cross-sectional shape in a direction parallel to the color filter substrate, the cross-sectional shape including a first supporting portion extending along a first direction and two second supporting portions extending along a second direction and being connected to two end portions of the first supporting portion, the first direction being perpendicular to the second direction;
a size of the first supporting portion along the first direction is greater than a size of the first supporting portion along the second direction;
a size of the second supporting portions along the second direction is greater than a size of the second supporting portions along the first direction; the size of the second supporting portions along the first direction is less than the size of the first supporting portion along the first direction,
wherein each of the spacers consist of one first supporting portion and two second supporting portions, center lines of the first supporting portion and the second supporting portions along the first direction do not coincide, the two second supporting portions are connected to the two end portions of the first supporting portion respectively and the two second supporting portions are provided on two opposite sides of the first supporting portion respectively.

2. The color filter substrate according to claim 1 , wherein,
the size of the first supporting portion along the second direction is equal to the size of the second supporting portions along the first direction.

3. The color filter substrate according to claim 1 , wherein, a size of the spacers along the a third direction is within a range of 2.8˜3.5 μm;
the third direction is perpendicular to the first direction and the second direction.

4. The color filter substrate according to claim 1 , wherein, material of the spacers includes a polyacrylic acid resin or a polyester resin.

5. A display device comprising an array substrate of claim 1 and a color filter substrate cell-assembled with each other.

6. The display device according to claim 5 , wherein;
grooves are provided at a position of the array substrate corresponding to the spacers, an aperture size of the grooves being greater than or equal to an outline size of a side surface of the spacers that is close to the array substrate.

7. The display device according to claim 5 , wherein,
the size of the first supporting portion along the second direction is equal to the size of the second supporting portions along the first direction.

8. The display device according to claim 5 , wherein, a size of the spacers along a third direction is within a range of 2.8˜3.5 μm;
the third direction is perpendicular to the first direction and the second direction.

9. The display device according to claim 5 , wherein, material of the spacers includes a polyacrylic acid resin or a polyester resin.

10. A manufacturing method for a color filter substrate, comprising preparing spacers on a base substrate of the color filter substrate, the method for preparing the spacers including:
forming a spacer material layer on the base substrate;
forming a photoresist layer on a surface of the spacer material layer;
forming a plurality of photoresist-covered regions and photoresist-removed regions on a surface of the photoresist layer by a mask exposure process; wherein, the photoresist-covered regions correspond to a first supporting portion and two second supporting portions; the photoresist-removed regions correspond to other regions of the spacer material layer; the first supporting portion extends along a first direction, the second supporting portions extend along a second direction, the first direction being perpendicular to the second direction; the second supporting portions are connected to two end portions of the first supporting portion;
a size of the first supporting portion along the first direction is greater than a size thereof along the second direction;
a size of the second supporting portions along the second direction is greater than a size thereof along the first direction; the size of the second supporting portions along the first direction is less than the size of the first supporting portion along the first direction;
removing the spacer material layer corresponding to the photoresist-removed regions;
removing the photoresist in the photoresist-covered regions to form the spacers consisting of the first supporting portion and the second supporting portions;
wherein each of the spacers consist of one first supporting portion and two second supporting portions, center lines of the first supporting portion and the second supporting portions in parallel with the first direction does not coincide, the two second supporting portions are connected to the two end portions of the first supporting portion respectively and the two second supporting portions are provided on two opposite sides of the first supporting portion respectively.

11. The manufacturing method for the color filter substrate according to claim 10 , wherein,
the size of the first supporting portion along the second direction is equal to the size of the second supporting portions along the first direction.

12. The manufacturing method for the color filter substrate according to claim 10 , wherein, a size of the spacer material layer along a third direction is within a range of 2.8˜3.5 μm;
the third direction is perpendicular to the first direction and the second direction respectively.

13. The color filter substrate according to claim 3 , wherein a ratio of the size of the first supporting portion along the first direction to the size of the first supporting portion along the second direction is greater than or equal to 10;
a ratio of a size of the spacers along the third direction to the size of the first supporting portion along the second direction or to the size of the second supporting portions along the first direction is greater than or equal to 10.

14. The display device according to claim 8 , wherein a ratio of the size of the first supporting portion along the first direction to the size of the first supporting portion along the second direction is greater than or equal to 10;
a ratio of a size of the spacers along the third direction to the size of the first supporting portion along the second direction or to the size of the second supporting portions along the first direction is greater than or equal to 10.

15. The manufacturing method for the color filter substrate according to claim 12 , wherein a ratio of the size of the first supporting portion along the first direction to the size of the first supporting portion along the second direction is greater than or equal to 10;
a ratio of a size of the spacers along a third direction to the size of the first supporting portion along the second direction or to the size of the second supporting portions along the first direction is greater than or equal to 10.

16. The color filter substrate according to claim 1 , wherein the spacers directly contact the color filter substrate.

17. The display device according to claim 6 , wherein
the spacers are located in grooves of an array substrate which is cell-assembled with the color filter substrate.

Assignees

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

Inventors

• Long Jun
• Zhang Hongkun
• Li Rui
• Yang Gang

Classifications

• G02F2001/13398

  Physics · mapped topic

• G02F2001/13396

  Physics · mapped topic

• G02B5/201 Primary

  in the form of arrays · CPC title

• G02F1/13394

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

• G02F1/13396

  Spacers having different sizes · CPC title