DISPLAY PANEL, METHOD FOR DRIVING THE SAME AND DISPLAY DEVICE

• US 20170249044A1
• Filed: 08/10/2016
• Published: 08/31/2017
• Est. Priority Date: 02/26/2016
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: LIU, Yingming, DONG, Xue, WANG, Haisheng, CHEN, Xiaochuan, DING, Xiaoliang, DENG, Liguang, ZHU, Huizhong
• Granted Patent: US 10,133,402 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134372 for fringe field switching [FFS] where the common electrode is not patterned
• CPC Class Codes: G02F 1/134381 Hybrid switching mode, i.e. for applying an electric field with components parallel and orthogonal to the substrates
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/136295 Materials; Compositions; Manufacture processes
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2201/123 pixel
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells

Abstract

The present disclosure discloses a display panel, a method for driving the same and a display device. The display panel includes a display panel including a first substrate and a second substrate arranged opposite to each other. The first substrate includes: a first base, and voltage-fixed electrodes that are arranged on the first base at a side facing the second substrate. A fixed voltage is applied to each of the voltage-fixed electrodes. The second substrate includes: a second base, and pressure sensing electrodes that are arranged on the second base at a side facing the first substrate. The pressure sensing electrodes are arranged opposite to the voltage-fixed electrodes respectively, and configured to detect a pressure applied at a touch position on the display panel according to capacitances between the pressure sensing electrodes and the corresponding voltage-fixed electrodes at a pressure detection stage.

Claims

1. A display panel comprising:

a first substrate and a second substrate arranged opposite to each other, wherein

the first substrate comprises;

a first base, and voltage-fixed electrodes that are arranged on the first base at a side facing the second substrate, wherein a fixed voltage is applied to each of the voltage-fixed electrodes; and

the second substrate comprises;

a second base, and pressure sensing electrodes that are arranged on the second base at a side facing the first substrate, wherein the pressure sensing electrodes are arranged opposite to the voltage-fixed electrodes respectively, and each pressure sensing electrode is configured to detect a pressure applied at a touch position on the display panel according to a capacitance between the pressure sensing electrode and the corresponding voltage-fixed electrode at a pressure detection stage.

2. The display panel according to claim 1, wherein the second substrate further comprises pixel electrodes and a common electrode that are arranged on the second base at the side facing the first substrate, and the pixel electrodes are arranged on the common electrode at a side that is farther away from the second base than the other side of the common electrode;

and

orthogonal projections of the pressure sensing electrodes on the second base are not overlapped with orthogonal projections of the pixel electrodes on the second base.

3. The display panel according to claim 2, wherein the pressure sensing electrodes and the pixel electrode are arranged on a same layer.

4. The display panel according to claim 3, wherein the second substrate further comprises signal lines, wherein the signal lines are connected to the pressure sensing electrodes through via holes respectively, and configured to input pressure scanning signals to the pressure sensing electrodes and transmit pressure sensing signals generated by the pressure sensing electrodes to an electronic chip, so that the electronic chip determines the pressure applied at the touch position according to the pressure sensing signals.

5. The display panel according to claim 4, wherein the second substrate further comprises gate lines and data lines, wherein the signal lines and the gate lines are arranged on a same layer or the signal lines and the data lines are arranged on a same layer.

6. The display panel according to claim 2, wherein at a touch recognition stage, the voltage-fixed electrodes function as the touch sensing electrodes, and a predetermined portion of the common electrode functions as touch scanning electrodes.

7. The display panel according to claim 6, wherein the common electrode comprises a plurality of strip-like sub-electrodes and a plurality of plate-like sub-electrodes, and the strip-like sub-electrodes extend in a first direction;

the strip-like sub-electrodes are arranged opposite to the voltage-fixed electrodes, all of the plate-like sub-electrodes are arranged in an array including a plurality of electrode groups, and each of the electrode groups comprises a plurality of plate-like sub-electrodes arranged in a second direction and electrically connected to each other; and

at the touch recognition stage, the electrode groups function as the touch scanning electrodes.

8. The display panel according to claim 1, wherein a value of the fixed voltage is in a range from 1V to 3V.

9. The display panel according to claim 1, wherein both the voltage-fixed electrodes and the pressure sensing electrodes are made of metal.

10. The display panel according to claim 1, wherein both the voltage-fixed electrodes and the pressure sensing electrodes are of a grid shape.

11. The display panel according to claim 1, wherein the first substrate is a color filter substrate, and the second substrate is an array substrate.

12. The display panel according to claim 5, wherein the pixel electrodes are separated from the common electrode by a first insulation layer, and the data lines are separated from the common electrode by a second insulation layer.

13. A method for driving the display panel according to claim 1, comprising steps of:

at the pressure detection stage, applying the fixed voltage to the voltage-fixed electrodes, and inputting pressure scanning signals to the pressure sensing electrodes, so as to generate the pressure sensing signals on the pressure sensing electrodes, thereby to determine by an electronic chip the pressure applied at the touch position according to the pressure sensing signals.

14. A method for driving the display panel according to claim 6, comprising:

at a display stage, inputting a common voltage signal to the common electrode, and inputting data signals to the pixel electrodes, so as to enable the display panel to display an image;

at the touch recognition stage, inputting touch scanning signals to a predetermined portion of the common electrode, and applying the fixed voltage to the voltage-fixed electrodes, so as to generate the touch sensing signals on the voltage-fixed electrodes, thereby to determine by an electronic chip the touch position according to the touch sensing signals; and

at the pressure detection stage, applying the fixed voltage to the voltage-fixed electrodes, and inputting pressure scanning signals to the pressure sensing electrodes, so as to generate the pressure sensing signals on the pressure sensing electrodes, thereby to determine by the electronic chip the pressure applied at the touch position according to the pressure sensing signals.

15. A display device comprising the display panel according to claim 1.

16. The display device according to claim 15, wherein the second substrate further comprises pixel electrodes and a common electrode that are arranged on the second base at the side facing the first substrate, and the pixel electrodes are arranged on the common electrode at a side that is farther away from the second base than the other side of the common electrode;

and

orthogonal projections of the pressure sensing electrodes on the second base are not overlapped with orthogonal projections of the pixel electrodes on the second base.

17. The display device according to claim 16, wherein the pressure sensing electrodes and the pixel electrode are arranged on a same layer.

18. The display device according to claim 17, wherein the second substrate further comprises signal lines, wherein the signal lines are connected to the pressure sensing electrodes through via holes respectively, and configured to input pressure scanning signals to the pressure sensing electrodes and transmit the pressure sensing signals generated by the pressure sensing electrodes to an electronic chip, so that the electronic chip determines the pressure applied at the touch position according to the pressure sensing signals.

19. The display device according to claim 18, wherein the second substrate further comprises gate lines and data lines, wherein the signal lines and the gate lines are arranged on a same layer or the signal lines and the data lines are arranged on a same layer.

20. The display device according to claim 16, wherein at a touch recognition stage, the voltage-fixed electrodes function as the touch sensing electrodes, and a predetermined portion of the common electrode functions as touch scanning electrodes.