Touch display panel and method for controlling the same, and touch display device

• US 10,001,867 B2
• Filed: 10/29/2014
• Issued: 06/19/2018
• Est. Priority Date: 07/28/2014
• Status: Expired due to Fees

• 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
• Primary Examiner(s): Sitta, Grant
• Assistant Examiner(s): BOGALE, AMEN W
• Application Number:
  US14/771,698
• Publication Number:
  US 20160364065A1
• Time in Patent Office: 1,329 Days
• Field of Search: None
• 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 device, comprising a first layer and a second layer, wherein the first layer comprises:

a plurality of touch sensing electrodes;

a plurality of first electrodes arranged in a same layer with the plurality of touch sensing electrodes and insulated from the plurality of touch sensing electrodes;

an insulating layer arranged on at least one first electrode of the plurality of first electrodes and at least one touch sensing electrode of the plurality of touch sensing electrodes; and

a bridging layer arranged on the insulation layer, wherein the bridging layer is configured to implement an electric connection between at least three electrodes of the plurality of first electrodes,

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

wherein the second layer comprises touch driving electrodes and common electrodes alternately arranged in a same layer and insulated from each other, the touch driving electrodes arranged in a different layer from the plurality of touch sensing electrodes and cross the plurality of touch sensing electrodes,

wherein a pattern of the at least one first electrode comprises a grid shape, and the plurality of first electrodes and the plurality of touch sensing electrodes are arranged alternately and extend in a same direction.

2. The touch display device according to claim 1, wherein the at least one first electrode is electrically connected to a plurality of first signal input terminals.

3. The touch display device according to claim 1, wherein the first signal input terminal is electrically connected to a corner of the at least one first electrode.

4. The touch display device according to claim 1, further comprising:

a black matrix arranged on a glass substrate, wherein

the at least one first electrode and at least one touch sensing electrode of the plurality of touch sensing electrodes are arranged on the black matrix, and

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

5. The touch display device according to claim 1, wherein a pattern of the insulating layer and the bridging layer is arranged within a coverage of a black matrix.

6. The touch display device according to claim 1, wherein the insulating layer is formed at a position where projections of the bridging layer and the at least one touch sensing electrode onto a 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 at least one touch sensing electrode.

7. The touch display device according to claim 1, wherein a pattern of the bridging layer is at a preset position within and/or outside a display region of the first layer.

8. The touch display device according to claim 1, wherein an electric potential of a first signal is lower than an electric potential of the electrostatic charges in the at least one first electrode.

9. The touch display device according to claim 1, wherein a first signal from the first signal input terminal is a common electrode signal.

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

11. The touch display device according to claim 1, wherein the at least one first electrode is made of a metal conducting material.

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

13. A method for controlling the touch display device according to claim 1, comprising:

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

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