TOUCH DISPLAY PANEL AND METHOD FOR CONTROLLING THE SAME, AND TOUCH DISPLAY DEVICE

• US 20160364065A1
• Filed: 10/29/2014
• Published: 12/15/2016
• Est. Priority Date: 07/28/2014
• 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: DING, Xiaoliang, DONG, Xue, WANG, Haisheng, LIU, Yingming
• Granted Patent: US 10,001,867 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04104 Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A touch display panel and a method for controlling the same and a touch display device are provided. The touch display panel includes at least one first electrode arranged in a same layer with the touch sensing electrode and insulated from the touch sensing electrode. The first electrode is electrically connected to a first signal input terminal in a display phase to discharge electrostatic charges in the first electrode, and is electrically connected to a second signal input terminal in a touch display phase to keep the first electrode in a high impedance state in the touch phase.

Claims

1. A touch display panel, comprising a plurality of touch sensing electrodes, wherein the touch display panel further comprises:

at least one first electrode arranged in a same layer with the touch sensing electrode and insulated from the touch sensing electrode,

wherein the first electrode is electrically connected to a first signal input terminal in a display phase to discharge electrostatic charges in the first electrode, and is electrically connected to a second signal input terminal in a touch phase to keep the first electrode in a high impedance state in the touch phase.

2. The touch display panel according to claim 1, wherein a pattern of the first electrode is of a grid shape or plate shape.

3. The touch display panel according to claim 1, wherein the first electrode comprises a plurality of strips electrically connected to each other at at least one end of each of the stripes.

4. The touch display panel according to claim 3, wherein a pattern of the first electrode comprises a plurality of stripe patterns arranged in parallel with the touch sensing electrode, or a plurality of stripe patterns arranged to cross the touch sensing electrode perpendicularly.

5. The touch display panel according to claim 1, wherein the first electrode is electrically connected to a plurality of first signal input terminals.

6. The touch display panel according to claim 1, wherein the first signal input terminal is electrically connected to a corner of the first electrode.

7. The touch display panel according to claim 1, further comprising:

a black matrix arranged on a glass substrate, wherein

the first electrode and the touch sensing electrode are arranged on the black matrix, and

projections of the first electrode and the touch sensing electrode onto the glass substrate are within a projection of the black matrix onto the glass substrate.

8. The touch display panel according to claim 1, wherein the number of the at least one first electrode is more than one, and the plurality of first electrodes and the plurality of touch sensing electrodes are arranged alternately and extend in a same direction.

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

an insulating layer arranged on the first electrode and the touch sensing electrode; and

a bridging layer arranged on the insulating layer, wherein the bridging layer is configured to implement an electric connection between the plurality of first electrodes.

10. The touch display panel according to claim 9, wherein a pattern of the insulating layer and the bridging layer is arranged within a coverage of the black matrix.

11. The touch display panel according to claim 9, wherein the insulating layer is formed at a position where projections of the bridging layer and the touch sensing electrode onto the glass substrate overlap, and an area of a projection of the insulating layer onto the glass substrate is greater than an area of a projection of the bridging layer onto the touch sensing electrode.

12. The touch display panel according to claim 9 or 10, wherein a pattern of the bridging layer is at a preset position within and/or outside a display region of the touch display panel.

13. The touch display panel according to claim 1, wherein an electric potential of a first signal is lower than an electric potential of the electrostatic charges in the first electrode.

14. The touch display panel according to claim 1, wherein the first signal is a common electrode signal.

15. The touch display panel according to claim 1, wherein the second signal input terminal is a floating terminal.

16. The touch display panel according to claim 1, wherein the first electrode is made of a metal conducting material.

17. The touch display panel according to claim 1, wherein the touch display panel is a color filter substrate, and the color filter substrate comprises a bridging layer and a color filter layer arranged on the bridging layer.

18. A method for controlling the touch display panel according to claim 1, comprising:

in a display phase, enabling the first electrode to be electrically connected to the first signal input terminal to discharge the electrostatic charges in the first electrode; and

in a touch phase, enabling the first electrode to be electrically connected to the second signal input terminal to keep the first electrode in a high impedance state in the touch phase.

19. A touch display device comprising the touch display panel according to claim 1.

20. The touch display device according to claim 19, further comprising:

a second touch display panel comprising touch driving electrodes and common electrodes alternately arranged in a same layer and insulated from each other, wherein

the touch driving electrodes are arranged in a different layer from the touch sensing electrode and cross the touch sensing electrodes.