Display panel, detection method and display device

Patent metadata

Field	Value
Publication number	US-11605323-B2
Application number	US-202117333763-A
Country	US
Kind code	B2
Filing date	May 28, 2021
Priority date	Oct 21, 2020
Publication date	Mar 14, 2023
Grant date	Mar 14, 2023

Abstract

The present application provides a display panel, a manufacturing method, a detection method, and a display device. The display panel includes a display area and a non-display area surrounding the display area. The non-display area includes: a crack detection line surrounding the display area; a screen control line; a plurality of switch signal lines; and a plurality of detection switches electrically connected at different positions to the crack detection line. Each detection switch is also connected to the screen control line and a respective switch signal line, and allows conduction between the crack detection line and the screen control line based on the switch signal input by the switch signal line, such that the screen control line drives the display panel to display according to the test signal input by the crack detection line.

First claim

The invention claimed is:

1. A display panel, comprising a display area and a non-display area surrounding the display area, wherein the non-display area comprises:
a crack detection line surrounding the display area;
a screen control line;
a plurality of switch signal lines; and
a plurality of detection switches electrically connected at a plurality of detection positions respectively to the crack detection line; wherein each detection switch is also connected to the screen control line and a respective switch signal line, and allows conduction between the crack detection line and the screen control line based on a switch signal input by the switch signal line, such that the screen control line drives the display panel to display an image based on a test signal input by the crack detection line.

2. The display panel according to claim 1 , further comprising a binding area bound to a flexible circuit board, wherein
the plurality of detection switches is respectively arranged in areas on opposite sides, away from the binding area, of the non-display area; or
the plurality of detection switches is respectively arranged in an area surrounding the display area, and away from the binding area of the non-display area.

3. The display panel according to claim 1 , wherein each detection switch comprises a control terminal, a first terminal, and a second terminal; wherein
the first terminal is electrically connected to the crack detection line,
the second terminal is electrically connected to the screen control line, and
the control terminal is electrically connected to a respective switch signal line, such that conduction is allowed between the first terminal and the second terminal based on the switch signal.

4. The display panel according to claim 3 , further comprising a driving circuit layer, wherein each detection switch comprises a thin film transistor provided on the driving circuit layer.

5. The display panel according to claim 1 , further comprising a driving circuit layer, wherein the driving circuit layer comprises a gate layer and a source-drain layer; the screen control line is provided on at least one of the gate layer and the source-drain layer, and the crack detection line is provided on one of the gate layer and the source-drain layer.

6. The display panel according to claim 1 , wherein the screen control line comprises at least one of a gate start voltage line, a light emission start voltage line, and a data signal line.

7. The display panel according to claim 1 , further comprising a flexible display touch screen, wherein each switch signal line comprises a signal line of the flexible display touch screen.

8. The display panel according to claim 7 , further comprising a driving circuit layer, wherein the driving circuit layer comprises an encapsulation layer, and the plurality of switch signal lines is provided on the encapsulation layer.

9. A display device, comprising a display panel, wherein the display panel comprises a display area and a non-display area surrounding the display area, and the non-display area comprises:
a crack detection line surrounding the display area;
a screen control line;
a plurality of switch signal lines; and
a plurality of detection switches electrically connected at a plurality of detection positions respectively to the crack detection line; wherein each detection switch is also connected to the screen control line and a respective switch signal line, and allows conduction between the crack detection line and the screen control line based on a switch signal input by the switch signal line, such that the screen control line drives the display panel to display an image based on a test signal input by the crack detection line.

10. The display device according to claim 9 , wherein the display panel further comprises a binding area bound to a flexible circuit board, wherein
the plurality of detection switches is respectively arranged in areas on opposite sides, away from the binding area, of the non-display area; or
the plurality of detection switches is respectively arranged in an area, surrounding the display area and away from the binding area of the non-display area.

11. The display device according to claim 9 , wherein each detection switch comprises a control terminal, a first terminal, and a second terminal; wherein
the first terminal is electrically connected to the crack detection line;
the second terminal is electrically connected to the screen control line; and
the control terminal is electrically connected to a respective switch signal line, such that conduction is allowed between the first terminal and the second terminal based on the switch signal.

12. The display device according to claim 11 , wherein the display panel further comprises a driving circuit layer, and each detection switch comprises a thin film transistor provided on the driving circuit layer.

13. The display device according to claim 9 , wherein the display panel further comprises a driving circuit layer, the driving circuit layer comprises a gate layer and a source-drain layer, and the screen control line is arranged on at least one of the gate layer and the source-drain layer, and the crack detection line is provided on one of the gate layer and the source-drain layer.

14. The display device according to claim 9 , wherein the screen control line comprises at least one of a gate start voltage line, a light emission start voltage line, and a data signal line.

15. The display device according to claim 9 , wherein the display panel further comprises a flexible display touch screen and each of the plurality of switch signal linel comprises a signal line of the flexible display touch screen.

16. The display device according to claim 15 , wherein the display panel further comprises a driving circuit layer, the driving circuit layer comprises an encapsulation layer, and the plurality of switch signal lines is arranged on the encapsulation layer.

17. A detection method using a display panel, wherein the display panel comprises a display area and a non-display area surrounding the display area, and the non-display area comprises:
a crack detection line surrounding the display area;
a screen control line;
a plurality of switch signal lines; and
a plurality of detection switches electrically connected at a plurality of detection positions respectively to the crack detection line; wherein each detection switch is also connected to the screen control line and a respective switch signal line, and allows conduction between the crack detection line and the screen control line based on a switch signal input by the respective switch signal line, such that the screen control line drives the display panel to display an image based on a test signal input by the crack detection line;
the detection method comprising:
inputting the switch signal to each switch signal line in sequence according to a preset time sequence;
allowing the conduction between the crack detection line and the screen control line by a respective detection switch in response to the switch signal input by the switch signal line; and
driving, by the screen control line, the display panel to display the image based on the test signal input by the crack detection line, thus performing detection on the crack detection line in stages according to a display state of the display panel and a position of the detection switch.

18. The detection method according to claim 17 , further comprising:
setting positions electrically connected to the plurality of detection switches

Assignees

• Chongqing Boe Display Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Han Kang
• Yang Guangjie
• Meng Weixin
• Kwak Jonguk
• Xie Yang
• Peng Kai
• Li Fei
• Guo Wenfeng

Classifications

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• H10K2102/311

  Flexible OLED · CPC title

• G09G3/006 Primary

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title