Display panel and display device including flexible substrate layer with intersecting planes

Patent metadata

Field	Value
Publication number	US-11961424-B2
Application number	US-202117482078-A
Country	US
Kind code	B2
Filing date	Sep 22, 2021
Priority date	Jan 28, 2021
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

A display panel includes a base substrate and a flexible substrate layer. The base substrate includes a flat portion and a curved portion extending from the flat portion and curved towards a side of the base substrate facing away a display surface of the display panel. The flexible substrate layer includes a first portion on a side of the base substrate facing the display surface and a second portion on a side of the base substrate facing away from the display surface. The first portion includes a pixel circuit and the second portion includes a signal line electrically connected to the pixel circuit. The display panel further includes a support structure including a support surface facing away from the display surface, the second portion is coupled to the support surface, and a plane of the support surface intersects a plane of the flat portion of the base substrate.

First claim

The invention claimed is:

1. A display panel, comprising:
a base substrate; and
a flexible substrate layer on the base substrate,
wherein the base substrate comprises a flat portion and a curved portion extending from the flat portion and curved towards a side of the base substrate facing away from a display surface of the display panel, and the flexible substrate layer comprises a first portion on a side of the base substrate facing the display surface of the display panel and a second portion on a side of the base substrate facing away from the display surface,
wherein the first portion of the flexible substrate layer comprises a pixel circuit for driving pixels of the display panel, and the second portion of the flexible substrate layer comprises a signal line electrically connected to the pixel circuit,
wherein the display panel further comprises a support structure fixed to the curved portion of the base substrate, the support structure comprises a support surface facing away from the display surface of the display panel, the second portion of the flexible substrate layer is coupled to the support surface to be supported by the support surface, and a plane of the support surface intersects a plane of the flat portion of the base substrate,
wherein the support structure comprises a support adhesive layer, the support adhesive layer is fixed to a surface of the curved portion of the base substrate facing away from the display surface of the display panel, a flat surface of the support adhesive layer facing away from the display surface of the display panel forms the support surface, wherein the display panel further comprises a first protective layer between the support surface and the second portion of the flexible substrate layer, and
wherein the display panel further comprises a second protective layer on a surface of the second portion of the flexible substrate layer facing away from the support adhesive layer.

2. The display panel according to claim 1 , wherein the support adhesive layer extends to the flat portion of the base substrate and is in contact with a portion of a surface of the flat portion facing away from the display surface of the display panel.

3. The display panel according to claim 1 , wherein a material of the support adhesive layer comprises foamed rubber.

4. The display panel according to claim 1 , wherein a thickness and a modulus of the first protective layer are respectively equal to a thickness and a modulus of the second protective layer.

5. The display panel according to claim 1 , wherein the first portion of the flexible substrate layer extends along the flat portion and the curved portion of the base substrate, the flexible substrate layer further reversely bends and extends from the first portion toward the flat portion of the base substrate beyond the curved portion of the base substrate, thereby forming the second portion and an arc-shaped portion connecting the second portion and the first portion, wherein the display panel further comprises a third protective layer on a surface of the arc-shaped portion facing away from the base substrate.

6. The display panel according to claim 1 , wherein the display panel further comprises a fourth protective layer between the base substrate and the flexible substrate layer, the fourth protective layer extends along the flat portion and the curved portion of the base substrate without going beyond an end of the curved portion of the base substrate.

7. The display panel according to claim 6 , wherein the display panel further comprises a light emitting layer, a polarizing layer and a cover plate on a side of the flexible substrate layer facing away from the base substrate.

8. A display device comprising the display panel according to claim 1 .

9. The display device according to claim 8 ,
wherein the support structure comprises a support adhesive layer, the support adhesive layer is fixed to a surface of the curved portion of the base substrate facing away from the display surface of the display panel, a flat surface of the support adhesive layer facing away from the display surface of the display panel forms the support surface, and
wherein the display panel further comprises a first protective layer between the support surface and the second portion of the flexible substrate layer.

10. The display device according to claim 9 , wherein the support adhesive layer extends to the flat portion of the base substrate and is in contact with a portion of a surface of the flat portion facing away from the display surface of the display panel.

11. The display device according to claim 9 , wherein the display panel further comprises a second protective layer on a surface of the second portion of the flexible substrate layer facing away from the support adhesive layer.

12. The display device according to claim 8 , wherein the base substrate further comprises a reversely bent portion extending from the curved portion and bending towards the flat portion of the base substrate, the reversely bent portion forms the support structure, and an end of the reversely bent portion is in contact with a surface of one of the flat portion and the curved portion of the base substrate facing away from the display surface of the display panel.

13. The display device according to claim 12 , wherein the display panel further comprises a first adhesive layer and a first protective layer between the second portion of the flexible substrate layer and the reversely bent portion, and the second portion of the flexible substrate layer and the first protective layer are fixed to the reversely bent portion via the first adhesive layer.

14. The display device according to claim 13 , wherein the display panel further comprises a second protective layer on a surface of the second portion of the flexible substrate layer facing away from the reversely bent portion.

15. The display device according to claim 8 ,
wherein the first portion of the flexible substrate layer extends along the flat portion and the curved portion of the base substrate, the flexible substrate layer further reversely bends and extends from the first portion toward the flat portion of the base substrate beyond the curved portion of the base substrate, thereby forming the second portion and an arc-shaped portion connecting the second portion and the first portion, and
wherein the display panel further comprises a third protective layer on a surface of the arc-shaped portion facing away from the base substrate.

16. A display panel, comprising:
a base substrate; and
a flexible substrate layer on the base substrate,
wherein the base substrate comprises a flat portion and a curved portion extending from the flat portion and curved towards a side of the base substrate facing away from a display surface of the display panel, and the flexible substrate layer comprises a first portion on a side of the base substrate facing the display surface of the display panel and a second portion on a side of the base substrate facing away from the display surface,
wherein the first portion of the flexible substrate layer comprises a pixel circuit for driving pixels of the display panel, and the second portion of the flexible substrate layer comprises a signal line electrically connected to the pixel circuit,
wherein the display panel further comprises a support structure fixed to the curved portion of the base substrate, the support structure comprises a support surface facing away from the display surface of the display panel, the second portion of the flexible substrate layer is coupled to the support surface

Assignees

• Boe Technology Group Co Ltd

Inventors

• Gao Biao
• Li Zhao
• Luo Xiaofei

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K59/871

  Self-supporting sealing arrangements · CPC title

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• G09F9/301 Primary

  flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED · CPC title