Display assembly and method of manufacturing the same, and display apparatus

Patent metadata

Field	Value
Publication number	US-11656702-B2
Application number	US-202117389943-A
Country	US
Kind code	B2
Filing date	Jul 30, 2021
Priority date	Aug 13, 2020
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

A display assembly includes a flexible display panel, a cover plate, and first and second support layers. The panel includes a main portion with display surface, and a bending portion. The bending portion includes a first straight sub-portion connected to the main portion, an arched sub-portion, and a second straight sub-portion located at a surface of the main portion facing away from the display surface. The cover plate is disposed above the main portion and the first straight sub-portion. The first support layer is located between the first and second straight sub-portions, between the main portion and the second straight sub-portion, and connected to the second straight sub-portion. The second support layer is disposed between the first straight sub-portion and the cover plate, and configured to support the first straight sub-portion. An orthogonal projection of the second support layer overlaps with an orthogonal projection of the first support layer.

First claim

What is claimed is:

1. A display assembly, comprising:
a flexible display panel, including:
a main portion with a display surface; and
a bending portion bent toward a surface of the main portion facing away from the display surface; wherein the bending portion includes: a first straight sub-portion, an arched sub-portion, and a second straight sub-portion that are sequentially connected in an extending direction of the bending portion; the first straight sub-portion is further connected to the main portion, and the second straight sub-portion is located at the surface of the main portion facing away from the display surface;

a cover plate disposed above the main portion and the first straight sub-portion;
a first support layer located between the first straight sub-portion and the second straight sub-portion along a thickness direction of the display assembly, and between the main portion and the second straight sub-portion along the thickness direction of the display assembly, the first support layer being connected to the second straight sub-portion;
a second support layer disposed between the first straight sub-portion and the cover plate; an orthogonal projection of the second support layer on the cover plate overlapping with an orthogonal projection of the first support layer on the cover plate, and the second support layer being configured to support the first straight sub-portion;
a first backfilm disposed on surfaces of the main portion and the first straight sub-portion facing the first support layer; and
a second backfilm disposed on a surface of the second straight sub-portion facing the first support layer, the first backfilm being closer to the arched sub-portion than the second backfilm in a direction from the first support layer to the arched sub-portion.

2. The display assembly according to claim 1 , wherein the second support layer is connected to the cover plate and is in direct contact with the first straight sub-portion.

3. The display assembly according to claim 1 , further comprising an adhesive layer disposed at least on a surface of the arched sub-portion facing away from the first support layer.

4. The display assembly according to claim 3 , wherein the adhesive layer is further disposed on a surface of the first straight sub-portion facing the second support layer; wherein
the second support layer is connected to the cover plate and is in direct contact with the adhesive layer.

5. The display assembly according to claim 1 , wherein the second support layer is made of an elastic material or a rigid material.

6. The display assembly according to claim 5 , wherein the second support layer is made of the elastic material including polyethylene terephthalate or rubber.

7. The display assembly according to claim 5 , wherein the second support layer is made of the rigid material including metal.

8. The display assembly according to claim 1 , wherein
the arched sub-portion has surfaces perpendicular to a thickness thereof, and a first side surface and a second side surface connected to the surfaces and opposite to each other; and
a dimension of the second support layer is approximately equal to a dimension of the bending portion in a direction from the first side surface to the second side surface.

9. The display assembly according to claim 1 , wherein a distance between an orthogonal projection of an edge of the first backfilm proximate to the arched sub-portion on the cover plate and an orthogonal projection of an edge of the second backfilm proximate to the arched sub-portion on the cover plate is in a range of 30 μm to 90 μm.

10. The display assembly according to claim 1 , wherein an orthogonal projection of an edge of the second backfilm proximate to the arched sub-portion on the cover plate is located within a range of an orthogonal projection of the second support layer on the cover plate.

11. The display assembly according to claim 1 , further comprising a third support layer disposed at least between the main portion and the first support layer.

12. The display assembly according to claim 11 , wherein the third support layer is made of metal.

13. The display assembly according to claim 1 , further comprising an optical sheet group disposed between the main portion and the cover plate, a thickness of the optical sheet group being greater than or equal to a thickness of the second support layer.

14. The display assembly according to claim 1 , further comprising:
a circuit board connected to the second straight sub-portion and located on the surface of the main portion facing away from the display surface;
a touch function layer disposed between the main portion and the cover plate; and
a flexible circuit board; one end of the flexible circuit board being connected to a portion of the touch function layer proximate to the second support layer, and another end of the flexible circuit board being located at a side of the second straight sub-portion away from the main portion and being connected to the circuit board;
wherein an orthogonal projection of the second support layer on a reference plane is non-overlapping with an orthogonal projection of the flexible circuit board on the reference plane, and the reference plane is a plane perpendicular to a plane where the main portion is located.

15. A display apparatus, comprising:
a housing with an opening; and
the display assembly according to claim 1 , wherein the cover plate is disposed at the opening of the housing, and the flexible display panel is disposed in the housing.

16. A method of manufacturing a display assembly, the display assembly being the display assembly according to claim 1 , the method comprising:
providing a flexible display panel to be processed, the flexible display panel to be processed including the main portion and a bendable portion; wherein the bendable portion includes the first straight sub-portion, a middle sub-portion, and the second straight sub-portion that are sequentially connected, and the first straight sub-portion is further connected to the main portion;
providing the second support layer on a surface of the first straight sub-portion directly connected to the display surface;
providing the cover plate above the display surface and a surface of the second support layer facing away from the first straight sub-portion;
providing the first support layer on surfaces of the main portion and the first straight sub-portion facing away from the display surface;
bending the bendable portion toward the surface of the main portion facing away from the display surface, so that the middle sub-portion forming the arched sub-portion, and the second straight sub-portion is located on the surface of the main portion facing away from the display surface and opposite to the first support layer; and
pressing the second straight sub-portion onto the first support layer, so that the second/straight sub-portion is connected to the first support layer;
before bending the bendable portion toward the surface of the main portion facing away from the display surface, the method further comprising:
providing a first backfilm on surfaces of the main portion and the first straight sub-portion facing the first support layer; and
providing a second backfilm on a surface of the second straight sub-portion facing the first support layer;
wherein the first backfilm is closer to the arched portion than the second backfilm in a direction from the first support layer to the arched portion after bending the bendable portion toward the surface of the main portion facing away from the display surface

Assignees

• Boe Technology Group Co Ltd

Inventors

• Luo Xiaofei

Classifications

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/04164

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• G09F9/301 Primary

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