Touch substrate, touch display panel and driving method thereof, touch display device

• US 9,881,577 B2
• Filed: 05/20/2016
• Issued: 01/30/2018
• Est. Priority Date: 09/17/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Inventors: Wang, Qingpu, Hu, Ming, Zhang, Lei, Li, Jun, Zeng, Ting, Xie, Xiaodong
• Primary Examiner(s): Flores, Roberto
• Application Number:
  US15/160,227
• Publication Number:
  US 20170083142A1
• Time in Patent Office: 620 Days
• Field of Search: 345173-179
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• 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
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells
• CPC Class Codes: G09G 3/3266 Details of drivers for scan electrodes
• CPC Class Codes: G09G 3/3677 suitable for active matrices only

Abstract

The present invention provides a touch substrate comprising a plurality of capacitive touch driving electrodes extending in a row direction, a plurality of capacitive touch sensing electrodes extending in a column direction, a plurality of first pressure sensitive electrodes extending in the row direction and a plurality of second pressure sensitive electrodes extending in the column direction, the capacitive touch driving electrode and the capacitive touch sensing electrode are insulated from each other, the first pressure sensitive electrode is insulated from the capacitive touch sensing electrode and the capacitive touch driving electrode, the second pressure sensitive electrode is insulated from the capacitive touch sensing electrode and the capacitive touch driving electrode, when the touch substrate is touched, a voltage corresponding to a pressure at a touch position is generated between the first pressure sensitive electrode and the second pressure sensitive electrode corresponding to the touch position.

Claims

1. A touch substrate, comprising a plurality of capacitive touch driving electrodes extending in a row direction and a plurality of capacitive touch sensing electrodes extending in a column direction, the capacitive touch driving electrodes and the capacitive touch sensing electrodes being insulated and spaced from each other, wherein the touch substrate further comprises a plurality of first pressure sensitive electrodes extending in the row direction and a plurality of second pressure sensitive electrodes extending in the column direction, the first pressure sensitive electrodes being insulated and spaced from the capacitive touch sensing electrodes and the capacitive touch driving electrodes, the second pressure sensitive electrodes being insulated and spaced from the capacitive touch sensing electrodes and the capacitive touch driving electrodes, and when the touch substrate is touched, a voltage corresponding to a pressure at a touch position is generated between the first pressure sensitive electrode and the second pressure sensitive electrode corresponding to the touch position,

wherein at least one capacitive touch driving electrode is provided between any two adjacent first pressure sensitive electrodes, and at least one capacitive touch sensing electrode is provided between any two adjacent second pressure sensitive electrodes,

wherein each of the capacitive touch sensing electrodes comprises a plurality of capacitive touch sensing electrode patches connected with each other successively, and each of the capacitive touch driving electrodes comprises a plurality of capacitive touch driving electrode patches connected with each other successively, and

two capacitive touch driving electrode patches of the same capacitive touch driving electrode on both sides of the same second pressure sensitive electrode are bridged by a first bridging element, and the first bridging element is insulated and spaced from the second pressure sensitive electrode;

and two capacitive touch sensing electrode patches of the same capacitive touch sensing electrode on both sides of the same first pressure sensitive electrode are bridged by a second bridging element, and the second bridging element is insulated and spaced from the first pressure sensitive electrode.

2. The touch substrate of claim 1, wherein the first pressure sensitive electrode and the capacitive touch driving electrode are alternately arranged, and the second pressure sensitive electrode and the capacitive touch sensing electrode are alternately arranged.

3. The touch substrate of claim 2, wherein the first pressure sensitive electrode comprises a first electrode strip and a first pressure sensing strip, the second pressure sensitive electrode comprises a second electrode strip and a second pressure sensing strip, both the first pressure sensing strip and the second pressure sensing strip are formed of a transparent material with piezoelectric effect, and the first pressure sensing strip and the second pressure sensing strip are provided intersecting with each other and in a same layer;

and

the first electrode strip is provided above the first pressure sensing strip, and the second electrode strip is provided below the second pressure sensing strip;

or, the first electrode strip is provided below the first pressure sensing strip, and the second electrode strip is provided above the second pressure sensing strip.

4. The touch substrate of claim 3, further comprises a processing module, a first piezoelectric transmission line and a second piezoelectric transmission line, the first piezoelectric transmission line being connected between the first electrode strip and the processing module, the second piezoelectric transmission line being connected between the second electrode strip and the processing module, wherein the processing module is configured to receive electrical signals from the first electrode strip and the second electrode strip, and determine the pressure at the touch position in accordance with the electrical signals from the first electrode strip and the second electrode strip.

5. The touch substrate of claim 4, further comprises a touch driving transmission line and a touch sensing transmission line, the touch driving transmission line being connected between the capacitive touch driving electrode and the processing module, the touch sensing transmission line being connected between the capacitive touch sensing electrode and the processing module, wherein the processing module is capable of providing a touch driving signal to the capacitive touch driving electrodes successively, and detecting an electrical signal sensed by the capacitive touch sensing electrode.

6. The touch substrate of claim 2, further comprises a transparent protective layer covering the capacitive touch sensing electrode, the capacitive touch driving electrode, the first pressure sensitive electrode and the second pressure sensitive electrode.

7. The touch substrate of claim 3, wherein the first pressure sensing strip and the second pressure sensing strip are formed of a material including polylactic acid piezoelectric material or piezoelectric ceramic material.

8. The touch substrate of claim 1, wherein the first pressure sensitive electrode comprises a first electrode strip and a first pressure sensing strip, the second pressure sensitive electrode comprises a second electrode strip and a second pressure sensing strip, both the first pressure sensing strip and the second pressure sensing strip are formed of a transparent material with piezoelectric effect, and the first pressure sensing strip and the second pressure sensing strip are provided intersecting with each other and in a same layer;

and

the first electrode strip is provided above the first pressure sensing strip, and the second electrode strip is provided below the second pressure sensing strip;

or, the first electrode strip is provided below the first pressure sensing strip, and the second electrode strip is provided above the second pressure sensing strip.

9. The touch substrate of claim 8, further comprises a processing module, a first piezoelectric transmission line and a second piezoelectric transmission line, the first piezoelectric transmission line being connected between the first electrode strip and the processing module, the second piezoelectric transmission line being connected between the second electrode strip and the processing module, wherein the processing module is configured to receive electrical signals from the first electrode strip and the second electrode strip, and determine the pressure at the touch position in accordance with the electrical signals from the first electrode strip and the second electrode strip.

10. The touch substrate of claim 9, further comprises a touch driving transmission line and a touch sensing transmission line, the touch driving transmission line being connected between the capacitive touch driving electrode and the processing module, the touch sensing transmission line being connected between the capacitive touch sensing electrode and the processing module, wherein the processing module is capable of providing a touch driving signal to the capacitive touch driving electrodes successively, and detecting an electrical signal sensed by the capacitive touch sensing electrode.

11. The touch substrate of claim 8, wherein the first pressure sensing strip and the second pressure sensing strip are formed of a material including polylactic acid piezoelectric material or piezoelectric ceramic material.

12. The touch substrate of claim 1, further comprises a processing module, a touch driving transmission line and a touch sensing transmission line, the touch driving transmission line being connected between the capacitive touch driving electrode and the processing module, the touch sensing transmission line being connected between the capacitive touch sensing electrode and the processing module, wherein the processing module is capable of providing a touch driving signal to the capacitive touch driving electrodes successively, and detecting an electrical signal sensed by the capacitive touch sensing electrode.

13. The touch substrate of claim 1, wherein a region defined by any two adjacent first pressure sensitive electrodes and any two adjacent second pressure sensitive electrodes is provided with two capacitive touch driving electrode patches and two capacitive touch sensing electrode patches therein, and

the two capacitive touch sensing electrode patches are integrally formed, and the two capacitive touch driving electrode patches are bridged by a third bridging element insulated and spaced from the capacitive touch sensing electrode patches;

or, the two capacitive touch driving electrode patches are integrally formed, and the two capacitive touch sensing electrode patches are bridged by a third bridging element insulated and spaced from the capacitive touch driving electrode patches.

14. The touch substrate of claim 13, wherein the first pressure sensitive electrode comprises a first electrode strip and a first pressure sensing strip, the second pressure sensitive electrode comprises a second electrode strip and a second pressure sensing strip, and wherein, the capacitive touch driving electrode patches, the capacitive touch sensing electrode patches and the first electrode strip are formed of a same material, and the third bridging element and the second electrode strip are formed of a same material;

or, the capacitive touch driving electrode patches, the capacitive touch sensing electrode patches and the second electrode strip are formed of a same material, and the third bridging element and the first electrode strip are formed of a same material.

15. The touch substrate of claim 1, further comprises a transparent protective layer covering the capacitive touch sensing electrode, the capacitive touch driving electrode, the first pressure sensitive electrode and the second pressure sensitive electrode.

16. A touch display panel, comprising a display substrate and the touch substrate of claim 1, the display substrate and the touch substrate are connected fixedly.

17. A touch display device, comprising the touch display panel of claim 16.

18. A driving method of the touch display panel of claim 16, comprising steps of:

providing a touch driving signal to the capacitive touch driving electrode;

detecting a touch sensing signal from the capacitive touch sensing electrode, and determining a touch position in accordance with the touch sensing signal; and

detecting a voltage between the first pressure sensitive electrode and the second pressure sensitive electrode, and determining a pressure at the touch position in accordance with the detected voltage.