Flexible display substrate, method for controlling same, and display device

Patent metadata

Field	Value
Publication number	US-11475811-B2
Application number	US-202117466150-A
Country	US
Kind code	B2
Filing date	Sep 3, 2021
Priority date	Sep 30, 2020
Publication date	Oct 18, 2022
Grant date	Oct 18, 2022

Abstract

Embodiments of the present disclosure provide a flexible display substrate, a method for controlling same, and a display device. The flexible display substrate includes: a flexible base, having a display region and a bonding region; and a touch module, on a side of the flexible base, and having a plurality of touch electrodes. Each of the touch electrodes is connected to one connecting line. The touch electrodes are inside the display region. The connecting line extends to the bonding region. At least two of the connecting lines are connected to at least one pair of capacitor metal blocks. Each pair of the capacitor metal blocks are symmetrically distributed along a bending line. The flexible base is allowed to be bent along the bending line.

First claim

What is claimed is:

1. A flexible display substrate, comprising:
a flexible base, having a display region and a bonding region; and
a touch module, on a side of the flexible base, and having a plurality of touch electrodes, wherein each of the touch electrodes is connected to one connecting line, the touch electrodes are inside the display region, and the connecting line extends to the bonding region; and
at least two of the connecting lines are connected to at least one pair of capacitor metal blocks, each pair of the capacitor metal blocks are symmetrically distributed along a bending line, and the flexible base is allowed to be bent along the bending line.

2. The flexible display substrate according to claim 1 , further comprising:
grounding metal, in the bonding region of the flexible base; and
a protection line, between the connecting lines and the grounding metal,
wherein the capacitor metal blocks are between the grounding metal and the protection line.

3. The flexible display substrate according to claim 2 , wherein the capacitor metal blocks are connected to the connecting lines by connecting metal, and the connecting metal crosses connecting lines and the protection line that are not connected to the connecting metal, and are connected to the capacitor metal blocks and the connecting lines by vias.

4. The flexible display substrate according to claim 1 , wherein the capacitor metal block has a square cross section in a direction perpendicular to a thickness direction, and a side length of the square cross section is three to five times a line width of the connecting lines.

5. The flexible display substrate according to claim 4 , wherein the square cross section has a side length of 50 micrometers to 150 micrometers.

6. The flexible display substrate according to claim 5 , wherein the flexible base has a first side and a second side that are opposite to each other, the flexible base bends toward the second side along the bending line, and the capacitor metal blocks are on the first side.

7. The flexible display substrate according to claim 1 , wherein the flexible base is allowed to be bent with a bending radius of r along the bending line, and a distance between each pair of capacitor metal blocks symmetrically distributed along the bending line when the flexible base is not bent is πr.

8. The flexible display substrate according to claim 1 , further comprising a driving chip, wherein each of the touch electrodes is connected to the driving chip by the connecting line.

9. The flexible display substrate according to claim 1 , comprising a plurality of bending lines, wherein the flexible base is allowed to be folded or curved along the bending lines.

10. The flexible display substrate according to claim 1 , wherein the touch electrodes comprise a plurality of touch driving electrodes and a plurality of touch sensing electrodes, any two of the touch driving electrodes are parallel to each other, any two of the touch sensing electrodes are parallel to each other, an extension direction of the touch driving electrode is at an angle with an extension direction of the touch sensing electrode,
one of the touch driving electrode and the touch sensing electrode, the extension direction of which is parallel to the bending line, is connected to the capacitor metal blocks.

11. A display device, comprising a flexible display substrate, wherein the flexible display substrate comprises:
a flexible base, having a display region and a bonding region; and
a touch module, on a side of the flexible base, and having a plurality of touch electrodes, wherein each of the touch electrodes is connected to one connecting line, the touch electrodes are inside the display region, and the connecting line extends to the bonding region, and
at least two of the connecting lines are connected to at least one pair of capacitor metal blocks, each pair of the capacitor metal blocks are symmetrically distributed along a bending line, and the flexible base is allowed to be bent along the bending line.

12. The display device according to claim 11 , further comprising:
grounding metal, in the bonding region of the flexible base; and
a protection line, between the connecting lines and the grounding metal,
wherein the capacitor metal blocks are between the grounding metal and the protection line.

13. The display device according to claim 12 , wherein the capacitor metal blocks are connected to the connecting lines by connecting metal, and the connecting metal crosses connecting lines and the protection line that are not connected to the connecting metal, and are connected to the capacitor metal blocks and the connecting lines by vias.

14. The display device according to claim 11 , wherein the capacitor metal block has a square cross section in a direction perpendicular to a thickness direction, and a side length of the square cross section is three to five times a line width of the connecting lines.

15. The display device according to claim 14 , wherein the square cross section has a side length of 50 micrometers to 150 micrometers.

16. The display device according to claim 15 , wherein the flexible base has a first side and a second side that are opposite to each other, the flexible base bends toward the second side along the bending line, and the capacitor metal blocks are on the first side.

17. The display device according to claim 11 , wherein the flexible base is allowed to be bent with a bending radius of r along the bending line, and a distance between each pair of capacitor metal blocks symmetrically distributed along the bending line when the flexible base is not bent is πr.

18. A method for controlling a flexible display substrate, wherein the flexible display substrate comprises: a flexible base, having a display region and a bonding region; and a touch module, on a side of the flexible base, and having a plurality of touch electrodes, wherein each of the touch electrodes is connected to one connecting line, the touch electrodes are inside the display region, the connecting line extends to the bonding region, at least two of the connecting lines are connected to at least one pair of capacitor metal blocks, each pair of the capacitor metal blocks are symmetrically distributed along a bending line, and the flexible base is allowed to be bent along the bending line; and the method comprises:
determining a state of the flexible display substrate based on a capacitance between each pair of capacitor metal blocks; and
determining an on/off status of each of the touch electrodes in the touch module based on a bent state of the flexible display substrate.

19. The method according to claim 18 , comprising:
when the capacitance between the pair of capacitor metal blocks decreases, determining that the flexible display substrate is in the bent state, and turning off a plurality of touch electrodes in a predetermined region; and
when the capacitance between the pair of capacitor metal blocks increases, determining that the flexible display substrate is in a flat state, and turning on each of the touch electrodes in the predetermined region.

20. The method according to claim 18 , wherein each of the touch electrodes is connected to one driving chip, and the determining the on/off status of each of the touch electrodes in the touch module based on the bent state comprises:
determining, by the driving chip, an amount of change in the capacitance between each pair of capacitor metal blocks based on electrical signals of two touch electrodes t

Assignees

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

Inventors

• Yang Yang
• Luo Xiaofeng
• Jang Kwanggyun
• Kim Jaeseung
• Luo Hongqiang

Classifications

• G06F3/044

  by capacitive means · CPC title

• G06F3/04164

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

• G09G3/035 Primary

  for flexible display surfaces · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title