Flexible display screen and flexible display device

Patent metadata

Field	Value
Publication number	US-10945341-B2
Application number	US-201815994128-A
Country	US
Kind code	B2
Filing date	May 31, 2018
Priority date	Aug 3, 2017
Publication date	Mar 9, 2021
Grant date	Mar 9, 2021

Abstract

Embodiments of the present disclosure provide a flexible display screen and a flexible display device. The flexible display screen includes a display screen body and a deformation component disposed on a back side of the display screen body, wherein when an ambient temperature is higher than a first temperature threshold value, the deformation component is deformed towards a direction in which the display screen body reveals curved display; when the ambient temperature is lower than a second temperature threshold value, the deformation component is deformed towards a direction in which the display screen body reveals flat display; and the second temperature threshold value is not greater than the first temperature threshold value.

First claim

The invention claimed is:

1. A flexible display screen, comprising a display screen body and a deformation component disposed on a back side of the display screen body,
wherein when an ambient temperature is higher than a first temperature threshold value, the deformation component is deformed towards a direction in which the display screen body reveals curved display;
when the ambient temperature is lower than a second temperature threshold value, the deformation component is deformed towards a direction in which the display screen body reveals flat display; and the second temperature threshold value is not greater than the first temperature threshold value,
wherein the deformation component is a deformation component with shape memory effect,
wherein the deformation component includes a main deformation component arranged corresponding to a display region of the display screen body and an annular component arranged along an edge of the display screen body,
wherein the main deformation component includes two groups of deformation units which are respectively a first group of deformation units and a second group of deformation units with different memory temperatures; a memory temperature of the first group of deformation units is greater than a memory temperature of the second group of deformation units; the first group of deformation units and the second group of deformation units are respectively disposed in different regions on the back side of the display screen body; the memory temperature of the first group of deformation units with highest memory temperature is the first temperature threshold value; the memory temperature of the second group of deformation units with lowest memory temperature is the second temperature threshold value;
when the ambient temperature is higher than the first temperature threshold value, the two groups of deformation units are respectively deformed towards directions in which corresponding regions of the display screen body are curved;
when the ambient temperature is higher than the second temperature threshold value and lower than the first temperature threshold value, the second group of deformation units with the lowest memory temperature are deformed towards the direction in which the corresponding region of the display screen body is curved, and the first group of deformation units with the highest memory temperature are deformed towards a direction in which the corresponding region of the display screen body is straightened; and
when the ambient temperature is lower than the second temperature threshold value, the two groups of deformation units are respectively deformed towards the directions in which the corresponding regions of the display screen body are straightened,
wherein the first group of deformation units include first deformation strips and second deformation strips which are intersected with each other to define a plurality of sub-regions; and the second group of deformation units include subunits which are respectively disposed in each of the plurality of sub-regions.

2. The flexible display screen according to claim 1 , wherein the memory temperature of the second group of deformation units with the lowest memory temperature is equal to the memory temperature of the annular component.

3. The flexible display screen according to claim 1 , wherein the first deformation strips are arranged along a long-side direction of the display screen body, and the second deformation strips are arranged along a short-side direction of the display screen body; and/or the subunits are herringbone subunits.

4. The flexible display screen according to claim 3 , wherein the memory temperature of the first group of deformation units is 0° C.; and the memory temperature of the second group of deformation units and the annular component is set to be −10° C.

5. The flexible display screen according to claim 1 , wherein a material of the deformation component is memory alloy; or the material of the deformation component is memory rubber.

6. The flexible display screen according to claim 1 , wherein the deformation unit is strip-shaped or planar-shaped.

7. A flexible display device, comprising the flexible display screen according to claim 1 .

Assignees

• Boe Technology Group Co Ltd
• Chengdu Boe Optoelect Tech Co

Inventors

• Hu Xiaorui
• Yang Guowen
• Wang Zhouping
• Wang Tao

Classifications

• G09F9/301 Primary

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

• H05K5/0017 Primary

  with operator interface units · CPC title

• H05K5/03

  Covers · CPC title