Display panel and display device

Patent metadata

Field	Value
Publication number	US-11809033-B2
Application number	US-202016966161-A
Country	US
Kind code	B2
Filing date	Apr 9, 2020
Priority date	Dec 13, 2019
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

A display panel and a display device are disclosed. In preparing the display panel, based on a height difference formed between a plurality of first column spacers and a plurality of second column spacers, as a color filter substrate deforms during a vacuum assembly process, a deformation area of a blind hole area increases because the second column spacers are not in contact with an array substrate in the blind hole area, resulting in a decrease in a radius of curvature of the deformation of the blind hole area, so that an amount of deformation is reduced and poor focusing due to Newton's ring effect on the blind hole can be prevented.

First claim

What is claimed is:

1. A display panel, comprising:
an array substrate comprising a blind hole area and a display area, wherein the blind hole area has an inner diameter area and an outer diameter area surrounding the inner diameter area;
a liquid crystal layer disposed on the array substrate and comprising spacers, wherein the spacers comprise a plurality of first column spacers and a plurality of second column spacers, and the first column spacers have a height greater than that of the second column spacers; and
a color filter substrate disposed on a side of the liquid crystal layer away from the array substrate;
wherein the first column spacers are disposed in the display area and excluded from the blind hole area, one end of each of the first column spacers is connected to the array substrate, another end of each of the first column spacers is connected to the color filter substrate, the second column spacers are disposed in the display area and the outer diameter area, and the second column spacers are apart from the array substrate; and
wherein in the display area, the spacers disposed in an area adjacent to the outer diameter area are the second column spacers.

2. The display panel of claim 1 , wherein the first column spacers are made of an organic photoresist, and/or the second column spacers are made of an organic photoresist.

3. The display panel of claim 1 , wherein the first column spacers are provided with a height difference between 0.35 microns (μm) and 0.45 μm with the second column spacers.

4. The display panel of claim 1 , wherein the second column spacers and the first column spacers are alternately arranged in a horizontal direction in the display area.

5. The display panel of claim 1 , wherein the array substrate comprises:
a first glass substrate;
a buffer layer disposed on the first glass substrate;
a thin-film transistor layer disposed on the buffer layer and provided with a first combined hole corresponding to the blind hole area, wherein the first combined hole extends through the thin-film transistor layer to a surface of the buffer layer; and
a first alignment film disposed on the thin-film transistor layer in the first combined hole.

6. The display panel of claim 5 , wherein the first combined hole comprises a first through hole and a second through hole, wherein the first through hole has a radius less than that of the second through hole, and the second through hole is provided above the first through hole and surrounds the first through hole.

7. The display panel of claim 5 , wherein the color filter substrate comprises:
a second glass substrate;
a black matrix layer disposed on a side of the second glass substrate adjacent to the array substrate;
a transparent electrode layer disposed on the black matrix layer;
an RGB color resist disposed in the black matrix layer and the transparent electrode layer, wherein the RGB color resist comprises a second combined hole corresponding to the blind hole area, and the second combined hole extends through the transparent electrode layer and the black matrix layer to a surface of the second glass substrate; and
a second alignment film disposed on the transparent electrode layer in the second combined hole.

8. The display panel of claim 7 , wherein the second combined hole comprises a third through hole and a fourth through hole, wherein the third through hole has a radius less than that of the fourth through hole, the third through hole is provided above the fourth through hole, and the fourth through hole surrounds the third through hole.

9. The display panel of claim 8 , wherein the black matrix layer surrounds the third through hole, and the transparent electrode layer surrounds the fourth through hole.

10. A display device, comprising a display panel and a camera, wherein the display panel comprises:
an array substrate comprising a blind hole area and a display area, wherein the blind hole area has an inner diameter area and an outer diameter area surrounding the inner diameter area;
a liquid crystal layer disposed on the array substrate and comprising spacers, wherein the spacers comprise a plurality of first column spacers and a plurality of second column spacers, and the first column spacers have a height greater than that of the second column spacers; and
a color filter substrate disposed on a side of the liquid crystal layer away from the array substrate;
wherein the first column spacers are disposed in the display area and excluded from the blind hole area, one end of each of the first column spacers is connected to the array substrate, another end of each of the first column spacers is connected to the color filter substrate, the second column spacers are disposed in the display area and the outer diameter area, and the second column spacers are apart from the array substrate; and
wherein the camera is disposed below the display panel and corresponding to the blind hole area; and
wherein in the display area, the spacers disposed in an area adjacent to the outer diameter area are the second column spacers.

11. The display device of claim 10 , wherein the first column spacers are made of an organic photoresist, and/or the second column spacers are made of an organic photoresist.

12. The display device of claim 10 , wherein the first column spacers are provided with a height difference between 0.35 microns (μm) and 0.45 μm with the second column spacers.

13. The display device of claim 10 , wherein the second column spacers and the first column spacers are alternately arranged in a horizontal direction in the display area.

14. The display device of claim 10 , wherein the array substrate comprises:
a first glass substrate;
a buffer layer disposed on the first glass substrate;
a thin-film transistor layer disposed on the buffer layer and provided with a first combined hole corresponding to the blind hole area, wherein the first combined hole extends through the thin-film transistor layer to a surface of the buffer layer; and
a first alignment film disposed on the thin-film transistor layer in the first combined hole.

15. The display device of claim 14 , wherein the first combined hole comprises a first through hole and a second through hole, wherein the first through hole has a radius less than that of the second through hole, and the second through hole is provided above the first through hole and surrounds the first through hole.

16. The display device of claim 14 , wherein the color filter substrate comprises:
a second glass substrate;
a black matrix layer disposed on a side of the second glass substrate adjacent to the array substrate;
a transparent electrode layer disposed on the black matrix layer;
an RGB color resist disposed in the black matrix layer and the transparent electrode layer, wherein the RGB color resist comprises a second combined hole corresponding to the blind hole area, and the second combined hole extends through the transparent electrode layer and the black matrix layer to a surface of the second glass substrate; and
a second alignment film disposed on the transparent electrode layer in the second combined hole.

17. The display device of claim 16 , wherein the second combined hole comprises a third through hole and a fourth through hole, wherein the third through hole has a radius less than that of the fourth through hole, the third through hole is provided above the fourth through hole, and the fourth through hole surrounds the third through hole.

18. The display device of claim 17 , wherein the black matrix layer surrou

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Yu Pengfei
• Song Tao

Classifications

• G02F1/133512 Primary

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

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · 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

• G02F1/13398

  Spacer materials; Spacer properties · CPC title