Display Device, Driving Method Thereof, and Electronic Device

• US 20170235400A1
• Filed: 08/03/2016
• Published: 08/17/2017
• Est. Priority Date: 10/15/2015
• 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: Dong, Xue, Liu, Wei, Li, Changfeng, Wang, Pengpeng, Ding, Xiaoliang, Wang, Haisheng, Chen, Xiaochuan, Liu, Yingming, Zhao, Weijie, Yang, Shengji
• Granted Patent: US 10,627,935 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• 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 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells

Abstract

A display device and a driving method thereof, and an electronic device are provided. The display device includes: an array substrate and an opposing substrate arranged opposite to each other, a touch electrode pattern provided between the array substrate and the opposing substrate, a backlight module provided below the array substrate; and a counter electrode provided on the backlight module; the counter electrode and the touch electrode pattern forming a capacitive structure; in a touch detection period, a touch detection signal is loaded onto the touch electrode pattern and the counter electrode at the same time, to determine a touch position; in a pressure detection period, a touch detection signal is loaded onto the touch electrode pattern or the counter electrode, to determine a magnitude of pressure in the touch position.

Claims

1. A display device, comprising:

an array substrate and an opposing substrate arranged opposite to each other,

a touch electrode pattern provided between the array substrate and the opposing substrate,

a backlight module provided below the array substrate; and

a counter electrode provided on the backlight module, the counter electrode and the touch electrode pattern forming a capacitive structure;

wherein, in a touch detection period, a touch detection signal is loaded onto the touch electrode pattern and the counter electrode at the same time, to determine a touch position by detecting a change in a capacitance value of the respective touch electrode pattern;

in a pressure detection period, a touch detection signal is loaded onto the touch electrode pattern or the counter electrode, to determine a magnitude of pressure in the touch position by detecting a change in a capacitance value between the touch electrode pattern and the counter electrode.

2. The display device according to claim 1, wherein, the counter electrode is provided on a side surface or a back surface of the backlight module adjacent to the array substrate.

3. The display device according to claim 2, wherein, in the touch detection period, an electrical signal the same as the touch detection signal is loaded onto a gate line and a data line in the array substrate.

4. The display device according to claim 2, further comprising a touch detection chip, wherein, in the pressure detection period, the touch detection chip is specifically configured for loading the touch detection signal onto the touch electrode pattern, and at the same time, loading a fixed value signal onto the counter electrode.

5. The display device according to claim 4, wherein, in the pressure detection period, an electrical signal the same as the touch detection signal is loaded onto a gate line and a data line in the array substrate.

6. The display device according to claim 1, further comprising a touch detection chip, wherein, in the pressure detection period, the touch detection chip is specifically configured for loading the touch detection signal onto the counter electrode, and at the same time, loading a fixed value signal onto the touch electrode pattern.

7. The display device according to claim 6, wherein, in the pressure detection period, the fixed value electrical signal is loaded onto a gate line and a data line in the array substrate.

8. The display device according to claim 1, wherein, the respective touch electrode pattern constitutes a common electrode layer on the array substrate.

9. The display device according to claim 1, wherein, the counter electrode is a metal frame provided outside the backlight module, or a metal patch attached to the back surface of the backlight module.

10. The display device according to claim 2, further comprising:

an outer attached layer provided on an outer side of the backlight module,

wherein, the outer attached layer is adjacent to the counter electrode provided on the back surface of the backlight module.

11. A driving method of a display device according to claim 1, comprising:

in a touch detection period, loading a touch detection signal onto a touch electrode pattern and a counter electrode at the same time, to determine a touch position by detecting a change in a capacitance value of the respective touch electrode pattern;

in a pressure detection period, loading a touch detection signal onto the touch electrode pattern or the counter electrode, to determine a magnitude of pressure in the touch position by detecting a change in a capacitance value between the touch electrode pattern and the counter electrode.

12. The driving method according to claim 11, further comprising:

in the touch detection period, loading an electrical signal the same as the touch detection signal onto a gate line and a data line in the array substrate.

13. The driving method according to claim 11, wherein, loading of a touch detection signal onto the touch electrode pattern or the counter electrode includes:

in the pressure detection period, loading a touch detection signal onto the touch electrode pattern, and at the same time, loading a fixed value signal onto the counter electrode.

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

in the pressure detection period, loading an electrical signal the same as the touch detection signal onto the gate line and the data line in the array substrate.

15. The driving method according to claim 11, wherein, loading of a touch detection signal onto the touch electrode pattern or the counter electrode includes:

in the pressure detection period, loading a touch detection signal onto the counter electrode, and at the same time, loading a fixed value signal onto the touch electrode pattern.

16. The driving method according to claim 15, further comprising:

in the pressure detection period, loading the fixed value electrical signal onto the gate line and the data line in the array substrate.

17. An electronic device, comprising the display device according to claim 1.

18. The driving method according to claim 12, wherein, loading of a touch detection signal onto the touch electrode pattern or the counter electrode includes:

in the pressure detection period, loading a touch detection signal onto the touch electrode pattern, and at the same time, loading a fixed value signal onto the counter electrode.

19. The driving method according to claim 12, wherein, loading of a touch detection signal onto the touch electrode pattern or the counter electrode includes:

in the pressure detection period, loading a touch detection signal onto the counter electrode, and at the same time, loading a fixed value signal onto the touch electrode pattern.