Display panel and flexible display device

Patent metadata

Field	Value
Publication number	US-11908349-B2
Application number	US-202016959146-A
Country	US
Kind code	B2
Filing date	May 27, 2020
Priority date	Apr 2, 2020
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

A display panel and a flexible display device are provided. The display panel includes a substrate, a first adhesive layer, a display layer, and a protective layer. The display layer includes an array layer and a light-emitting device layer. The array layer is disposed directly on the first adhesive layer, and a grid structure is disposed on the substrate. Neither a backplane nor a pressure-sensitive adhesive layer is disposed on the display panel, which allows effectively manufacture a thin display panel, reduces the film layers of the panel, and improves the flexibility of the display panel.

First claim

What is claimed is:

1. A display panel, comprising:
a substrate;
a first adhesive layer disposed on the substrate;
a display layer disposed on the first adhesive layer;
wherein the display layer comprises an array layer and a light-emitting device layer disposed on the array layer, the substrate is directly adhered to the array layer through the first adhesive layer, the substrate is used to support the display layer, and the substrate comprises a plurality of grid structures arranged discontinuously; and
wherein two lateral sides of the substrate comprise a plurality of openings arranged at equal intervals, and each of the plurality of the grid structures is filled with an elastic material,
wherein the substrate comprises at least one bending area, straight area, and connection area, and the bending area is connected to the straight area through the connection area,
and wherein the substrate further comprises a first grid structure and a second grid structure, the first grid structure is disposed on the bending area of the substrate, and the second grid structure is disposed on connection area of the substrate.

2. The display panel according to claim 1 , wherein a shape of the first grid structure is the same as a shape of the second grid structure.

3. The display panel according to claim 2 , wherein a radial length of the first grid structure is greater than a radial length of the second grid structure.

4. The display panel according to claim 1 , wherein a shape of each of the plurality of grid structures comprises a strip shape, a circular shape, an elliptical shape, or a wave shape, and the plurality of grid structures are arranged in an array manner.

5. A display panel, comprising:
a substrate;
a first adhesive layer disposed on the substrate;
a display layer disposed on the first adhesive layer;
wherein, the display layer comprises an array layer and a light-emitting device layer disposed on the array layer, the substrate is directly adhered to the array layer through the first adhesive layer, the substrate is used to support the display layer, and the substrate comprises a plurality of grid structures discontinuously arranged,
wherein the substrate comprises at least one bending area, straight area, and connection area, and the bending area is connected to the straight area through the connection area,
and wherein the substrate further comprises a first grid structure and a second grid structure, the first grid structure is disposed on the bending area of the substrate, and the second grid structure is disposed on connection area of the substrate.

6. The display panel according to claim 5 , wherein a shape of the first grid structure is the same as a shape of the second grid structure.

7. The display panel according to claim 5 , wherein a density of the first grid structure is greater than a density of the second grid structure.

8. The display panel according to claim 5 , wherein a radial length of the first grid structure is greater than a radial length of the second grid structure.

9. The display panel according to claim 5 , wherein a density of the plurality of the grid structures in the connection area gradually decreases along the bending area toward the straight area.

10. The display panel according to claim 5 , wherein each of the plurality of the grid structures penetrates the substrate.

11. The display panel according to claim 5 , wherein two lateral sides of the substrate comprise a plurality of openings arranged at equal intervals.

12. The display panel according to claim 5 , wherein a shape of each of the plurality of grid structures comprises a strip shape, a circular shape, an elliptical shape, or a wave shape, and the plurality of grid structures are arranged in an array manner.

13. The display panel according to claim 12 , wherein at least one edge of the grid structure in a length direction is an arc shape.

14. The display panel according to claim 5 , wherein the display layer further comprises a touch layer and a polarizer, the touch layer is disposed on the light-emitting device layer, and the polarizer is disposed on the touch layer.

15. The display panel according to claim 5 , wherein the display panel further comprises an elastic layer, the elastic layer is disposed in the same layer as the substrate, and the elastic layer fills each of the plurality of grid structures.

16. The display panel according to claim 15 , wherein a material of the elastic layer comprises silicone resin, metal material or amorphous material.

17. A flexible display device, comprising:
a substrate, wherein the substrate comprises at least one bending area, a straight area, and a connection area, and the bending area is connected to the straight area through the connection area;
a first adhesive layer disposed on the substrate;
a display layer disposed on the first adhesive layer; and
a protective layer disposed on the display layer;
wherein the display layer comprises an array layer and a light-emitting device layer disposed on the array layer, the substrate is directly adhered to the array layer through the first adhesive layer, and the bending area and the connection area of the substrate comprise a plurality of grid structures discontinuously arranged, and wherein as bending, the grid structures corresponding to the bending area and the connecting area are deformed to bend the flexible display device,
wherein the substrate further comprises a first grid structure and a second grid structure, the first grid structure is disposed on the bending area of the substrate, and the second grid structure is disposed on connection area of the substrate.

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Zhao Yong
• Han Wen

Classifications

• G09F9/301 Primary

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

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G09F9/33

  being semiconductor devices, e.g. diodes · CPC title

• Y02E10/549

  Organic PV cells · CPC title

• G06F1/1652

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title