Display panel and detecting method thereof

Patent metadata

Field	Value
Publication number	US-11538366-B2
Application number	US-202016916910-A
Country	US
Kind code	B2
Filing date	Jun 30, 2020
Priority date	Jul 12, 2019
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

The present disclosure discloses a display panel and a detecting method thereof. By providing at least one resistance sensor in a bending region, an extending direction of the resistance sensor is perpendicular to an extending direction of an axis for bending and overlaps with the axis for bending. By electrically connecting the resistance sensor to a detecting circuit, a change of the resistance value of the resistance sensor can be reflected as a change of voltage.

First claim

What is claimed is:

1. A display panel, comprising:
a bending region, wherein the bending region has an axis for bending extending in a first direction, and the bending region comprises at least one resistance sensor extending in a second direction perpendicular to the first direction and overlapping the axis;
a detecting circuit electrically connected to the resistance sensor, wherein the detecting circuit is configured to detect a voltage change amount caused by a change of a resistance value of the resistance sensor when the bending region is bent around the axis;
a light-shielding metal layer;
a source-drain metal layer; and
a touch metal layer;
wherein the bending region comprises multiple resistance sensors extending in the second direction and the respective resistance sensors are located in different film layers in the display panel;
orthographic projections of the respective resistance sensors on the display panel overlap with one another; and
the light-shielding metal layer, the source-drain metal layer and the touch metal layer are stacked, and the resistance sensors are located in one or more of the light-shielding metal layer, the source-drain metal layer, or the touch metal layer.

2. The display panel according to claim 1 , further comprising:
a display region; and
a peripheral region surrounding the display region;
wherein the bending region divides the display region into two parts, and the resistance sensor is located in an overlapping region of the bending region and the peripheral region.

3. The display panel according to claim 1 , wherein an orthographic projection of the resistance sensor on the display panel is in a bow shape.

4. The display panel according to claim 1 , wherein the light-shielding metal layer, the source-drain metal layer, and the touch metal layer are all provided with the resistance sensors.

5. The display panel according to claim 4 , further comprising:
a first gate metal layer; and a second gate metal layer stacked between the light-shielding metal layer and the source-drain metal layer;
an anode metal layer between the source-drain metal layer and the touch metal layer; and
a cathode metal layer between the source-drain metal layer and the touch metal layer;
wherein at least one layer of the first gate metal layer, the second gate metal layer, the anode metal layer, or the cathode metal layer is provided with the resistance sensor.

6. The display panel according to claim 5 , wherein the first gate metal layer, the second gate metal layer, the anode metal layer, and the cathode metal layer are all provided with the resistance sensors.

7. A detecting method for the display panel according to claim 1 , comprising:
detecting, by the detecting circuit, the voltage change amount caused by the change of the resistance value of the resistance sensor when the bending region is bent around the axis; and
determining, by the detecting circuit, a bending angle, a position of a neutral layer, and a broken film layer of the display panel according to the voltage change amount.

8. The detecting method according to claim 7 , wherein determining, by the detecting circuit, the bending angle of the display panel according to the voltage change amount, comprises:
determining, by the detecting circuit, that the voltage change amount is larger, in the condition that the bending angle of the display panel is larger.

9. The detecting method according to claim 7 , wherein determining, by the detecting circuit, the position of the neutral layer of the display panel according to the voltage change amount comprises:
determining, by the detecting circuit, that the neutral layer is located between a film layer in which one resistance sensor located and another film layer in which another resistance sensor located, in the condition that a voltage change amount caused by a change of a resistance value of the one resistance sensor increases, and a voltage change amount caused by a change of a resistance value of the another resistance sensor stacked on the one resistance sensor decreases.

10. The detecting method according to claim 7 , wherein determining, by the detecting circuit, a broken film layer of the display panel according to the voltage change amount comprises:
determining, by the detecting circuit, that a film layer proximate to a resistance sensor with signal abnormality is a broken film layer in the condition that the detecting circuit detects the resistance sensor with signal abnormality.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Li Xiaolong
• Zhao Meng
• Liu Zheng
• Wang Chunyang
• Zhang Mingxin

Classifications

• G01B7/30

  for measuring angles or tapers; for testing the alignment of axes · CPC title

• G06F1/1652

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

• G09F9/301 Primary

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

• G01B7/00 Primary

  Measuring arrangements characterised by the use of electric or magnetic techniques · CPC title

• G01B7/20 Primary

  formed by printed-circuit technique · CPC title