Touch display panel, touch display device and driving method

• US 10,133,383 B2
• Filed: 05/26/2016
• Issued: 11/20/2018
• Est. Priority Date: 11/03/2015
• 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: Wang, Haisheng, Dong, Xue, Xue, Hailin, Chen, Xiaochuan, Ding, Xiaoliang, Liu, Yingming, Zhao, Weijie, Yang, Shengji, Liu, Wei, Li, Changfeng, Liu, Hongjuan, Wang, Pengpeng
• Primary Examiner(s): Mehmood, Jennifer
• Assistant Examiner(s): GUPTA, PARUL H
• Application Number:
  US15/325,653
• Publication Number:
  US 20180232085A1
• Time in Patent Office: 908 Days
• Field of Search: None
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/136204 Arrangements to prevent high voltage or static electricity failures
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 2201/121 common or background
• 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 3/044 by capacitive means

Abstract

A touch display panel, a touch display device and a driving method are provided. The touch display panel includes an array substrate, an opposite substrate arranged opposite to the array substrate, a touch electrode arranged at a side of the array substrate facing the opposite substrate, and an antistatic layer arranged inside the touch display panel. The antistatic layer is located at a side of the opposite substrate facing the touch electrode, and the antistatic layer and the touch electrode are capable of forming a capacitive force sensor in the case that the antistatic layer is applied with a force scanning signal.

Claims

1. A touch display panel, comprising:

an array substrate;

an opposite substrate arranged opposite to the array substrate;

a touch electrode arranged at a side of the array substrate facing the opposite substrate; and

an antistatic layer arranged inside the touch display panel, wherein the antistatic layer is located at a side of the opposite substrate facing the touch electrode, and the antistatic layer and the touch electrode are capable of forming a capacitive force sensor in the case that a force scanning signal is applied to the antistatic layer.

2. The touch display panel according to claim 1, wherein a resistivity of the antistatic layer is not less than a preset threshold.

3. The touch display panel according to claim 2, further comprising:

a black matrix arranged between the opposite substrate and the antistatic layer; and

auxiliary electrodes arranged at a side of the antistatic layer facing the touch electrode;

wherein a resistivity of the auxiliary electrodes is less than that of the antistatic layer, and the auxiliary electrodes are located within a region of a projection of the black matrix onto the antistatic layer and are electrically connected to the antistatic layer.

4. The touch display panel according to claim 3, further comprising data lines and gate lines,

wherein the auxiliary electrodes comprise:

a plurality of first auxiliary electrodes extending in a gate line extending direction; and

a plurality of second auxiliary electrodes extending in a data line extending direction,

wherein the first auxiliary electrodes and the second auxiliary electrodes are spaced apart from each other.

5. The touch display panel according to claim 3, wherein

the auxiliary electrodes comprise a third auxiliary electrode and a fourth auxiliary electrode, the third auxiliary electrode and the fourth auxiliary electrode are each of a grid structure, the third auxiliary electrode is spaced part from the fourth auxiliary electrode, and the third auxiliary electrode and the fourth auxiliary electrode are evenly distributed in a region where the antistatic layer overlaps the touch electrode.

6. The touch display panel according to claim 2, wherein an overall resistance value of the antistatic layer is not less than 108 ohms and not greater than 1010 ohms.

7. The touch display panel according to claim 2, wherein an overall resistance value of the antistatic layer is 108 ohms.

8. A touch display device, comprising:

the touch display panel according to claim 1; and

a driving module configured to apply the force scanning signal to the antistatic layer at a force scanning stage of the touch display device.

9. The touch display device according to claim 8, further comprising:

a detection module configured to detect a change of a capacitance value of a mutual capacitance formed between the antistatic layer and the touch electrode at the force scanning stage; and

a processing module configured to determine the value of a corresponding force based on the change detected by the detection module.

10. The touch display device according to claim 9, wherein

the driving module is further configured to apply a common electrode signal to the touch electrode at a display stage of the touch display device, and apply a touch scanning signal to the touch electrode at a touch scanning stage of the touch display device.

11. The touch display device according to claim 8, wherein the force scanning signal is a common electrode signal.

12. A method for driving the touch display device according to claim 8, comprising:

applying the force scanning signal to the antistatic layer at a force detecting stage.

13. The method according to claim 12, further comprising:

applying a common electrode signal to the touch electrode at a display stage; and

applying a touch scanning signal to the touch electrode at a touch scanning stage.

14. The method according to claim 13, further comprising:

applying the common electrode signal to the antistatic layer at the display stage; and

maintaining the antistatic layer in a floating state during a touch detecting stage.

15. The method according to claim 12, further comprising:

applying a common electrode signal to the touch electrode and applying a touch scanning signal to the antistatic layer, at the force scanning stage.

16. The touch display device according to claim 8, wherein a resistivity of the antistatic layer is not less than a preset threshold.

17. The touch display device according to claim 16, wherein the touch display panel further comprises:

a black matrix arranged between the opposite substrate and the antistatic layer; and

auxiliary electrodes arranged at a side of the antistatic layer facing the touch electrode;

wherein a resistivity of the auxiliary electrodes is less than that of the antistatic layer, and the auxiliary electrodes are located within a region of a projection of the black matrix onto the antistatic layer and are electrically connected to the antistatic layer.

18. The touch display device according to claim 17, wherein the touch display panel further comprises data lines and gate lines,

wherein the auxiliary electrodes comprise:

a plurality of first auxiliary electrodes extending in a gate line extending direction; and

a plurality of second auxiliary electrodes extending in a data line extending direction,

wherein the first auxiliary electrodes and the second auxiliary electrodes are spaced apart from each other.

19. The touch display device according to claim 17, wherein

the auxiliary electrodes comprise a third auxiliary electrode and a fourth auxiliary electrode, the third auxiliary electrode and the fourth auxiliary electrode are each of a grid structure, the third auxiliary electrode is spaced part from the fourth auxiliary electrode, and the third auxiliary electrode and the fourth auxiliary electrode are evenly distributed in a region where the antistatic layer overlaps the touch electrode.

20. The touch display device according to claim 16, wherein an overall resistance value of the antistatic layer is not less than 108 ohms and not greater than 1010 ohms.