Flexible display device

Patent metadata

Field	Value
Publication number	US-11768519-B2
Application number	US-202016961123-A
Country	US
Kind code	B2
Filing date	Jun 19, 2020
Priority date	May 26, 2020
Publication date	Sep 26, 2023
Grant date	Sep 26, 2023

Abstract

A flexible display device is provided. A first support member is fixedly disposed with a housing, and a second support member is slidably disposed relative to the first support member. One end of the flexible display screen is connected to one end of the second support member, and the other end of the flexible display screen is connected to a winding mechanism within the housing. A first hard layer between the first support member and the flexible display screen is fixed to one side of the first support member, and a second hard layer between the first hard layer and the flexible display screen is fixed to one side of the second support member.

First claim

What is claimed is:

1. A flexible display device, comprising:
a housing disposed with a winding mechanism, a first support member fixedly disposed with the housing, and a second support member slidably disposed with the first support member;
a flexible display screen laid on one side of the first support member and the second support member, wherein a first end of the flexible display screen is connected to one end of the second support member away from the first support member, and a second end of the flexible display screen is connected to the winding mechanism; and
a hard layer comprising a first hard layer disposed between the first support member and the flexible display screen, and a second hard layer disposed between the first hard layer and the flexible display screen, wherein one side of the first hard layer away from the flexible display screen is fixedly connected to one side of the first support member, and one side of the second hard layer away from the flexible display screen is fixedly connected to one side of the second support member.

2. The flexible display device according to claim 1 , wherein at least one portion of the first hard layer overlaps at least one portion of the second hard layer.

3. The flexible display device according to claim 2 , wherein a thickness of the first hard layer and the second hard layer are both from 0.01 mm to 0.5 mm.

4. The flexible display device according to claim 2 , wherein a modulus of the first hard layer and the second hard layer are both from 5,000 MPa to 500,000 MPa.

5. The flexible display device according to claim 1 , wherein one side of the first hard layer away from the flexible display screen is adhered to one side of the first support member through a first adhesive layer; one side of the second hard layer close to the flexible display screen is adhered to one side of the flexible display screen through a second adhesive layer, and one side of the second hard layer away from the flexible display screen partially adhered to one side of the second support member through a third adhesive layer.

6. The flexible display device according to claim 1 , wherein an area of the first hard layer is greater than an area of the first support member, and an area of the second hard layer is greater than an area of the second support member.

7. The flexible display device according to claim 1 , wherein a compensation layer is further disposed on one side of the flexible display screen close to the first support member, and a thickness of the compensation layer is less than or equal to the thickness of the first hard layer.

8. The flexible display device according to claim 7 , wherein the compensation layer is integrally formed with the flexible display screen.

9. The flexible display device according to claim 7 , wherein one end of the compensation layer is adjacent to one end of the second hard layer, and when the second support member moves away from the first support member, the second support member moves with the flexible display screen to a position between the first support member and the flexible display screen.

10. The flexible display device according to claim 1 , wherein a soft layer is further disposed between the flexible display screen and the second hard layer, and a projection of the second hard layer on the flexible display screen falls within a projection range of the soft layer on the flexible display screen.

11. The flexible display device according to claim 10 , wherein a modulus of the soft layer is from 1 MPa to 10,000 MPa.

12. The flexible display device according to claim 10 , wherein the soft layer comprises foam material.

13. The flexible display device according to claim 1 , wherein a plurality of grooves are disposed at intervals in an upper surface of one of the first support member and the second support member, a plurality of comb teeth are disposed at intervals on the upper surface of the other of the first support member and the second support member, and each of the comb teeth is disposed corresponding to and embedded in each of the grooves.

14. The flexible display device according to claim 13 , wherein a cross section of each of grooves is an inverted trapezoid, and a cross section of each of comb teeth is a trapezoid.

15. The flexible display device according to claim 14 , wherein a height of a top surface of each of the comb teeth is less than or equal to a height of a top opening of each of the grooves.

16. The flexible display device according to claim 1 , wherein the flexible display device further comprises a guide member disposed within the housing, and the second end of the flexible display screen bypasses the guide member and is connected to the winding mechanism.

17. The flexible display device according to claim 16 , wherein the guide member is a roller, and a pair of circular protrusions are disposed on one of inner walls of two first lateral plates oppositely disposed in the housing and two end faces of the roller, a pair of circular grooves are disposed on the other of the inner walls of the two first lateral plates oppositely disposed in the housing and the two end faces of the roller, and the circular protrusions are embedded in the circular grooves.

18. The flexible display device according to claim 1 , wherein a pair of slide grooves are disposed on inner walls of two first lateral plates oppositely disposed in the housing, and two sides of the second support member are movably disposed in the pair of the slide grooves.

19. The flexible display device according to claim 18 , wherein a pair of slots are disposed on the inner walls of the two first lateral plates, and two sides of the first support member are fixedly disposed in the pair of the slots.

20. The flexible display device according to claim 1 , wherein the winding mechanism comprises a first winding member, a second winding member, and a transmission component, the first winding member is fixed to the second support member, the transmission component is fixed to the housing, and the second winding member is movably disposed with the transmission component, wherein when the flexible display screen is in a first state, the transmission component controls the first winding member and the second winding member to slide in directions away from each other; and when the flexible display screen is in a second state, the transmission component controls the first winding member and the second winding member to slide in a direction approaching each other.

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Feng Zikang

Classifications

• G06F1/1652 Primary

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

• G06F1/1624

  with sliding enclosures, e.g. sliding keyboard or display · CPC title

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G09F9/301 Primary

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

• H04M1/0268

  including a flexible display panel · CPC title