IN-CELL TOUCH PANEL AND DISPLAY DEVICE

• US 20160306454A1
• Filed: 09/20/2014
• Published: 10/20/2016
• Est. Priority Date: 05/30/2014
• 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: WANG, Haisheng, DONG, Xue, XUE, Hailin, LIU, Yingming, ZHAO, Weijie, DING, Xiaoliang, YANG, Shengji, LIU, Hongjuan, WANG, Lei, WANG, Chunlei
• Granted Patent: US 10,031,627 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/1333 Constructional arrangements; Manufacturing methodsG02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• 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 3/047 using sets of wires, e.g. crossed wires

Abstract

An in-cell touch panel and a display device are provided. Self-capacitance electrodes arranged in the same layer as pixel electrodes are disposed at gaps between the pixel electrodes of the touch panel in accordance with the self-capacitance principle. A touch detection chip can determine a touch position by detection of capacitance variation of the self-capacitance electrodes in a touch period. The touch panel does not need to add additional processes on the basis of the manufacturing process of an array substrate and hence can reduce the manufacturing cost and improve the productivity.

Claims

1. An in-cell touch panel, comprising:

a first substrate and a second substrate arranged opposite to each other, a pixel electrode layer disposed on one side of the second substrate facing the first substrate, and a touch detection chip, wherein

the pixel electrode layer includes a plurality of pixel electrodes and self-capacitance electrodes insulated from each other;

the pixel electrodes are arranged in an array;

a pattern of each self-capacitance electrode is disposed at a gap between two adjacent pixel electrodes; and

the touch detection chip is configured to determine a touch position by detection of capacitance variation of the self-capacitance electrodes in a touch period.

2. The in-cell touch panel according to claim 1, wherein the pattern of the self-capacitance electrode is a mesh structure including a plurality of mesh holes;

and the plurality of pixel electrodes correspond to the plurality of mesh holes.

3. The in-cell touch panel according to claim 1, further comprising:

a plurality of leads configured to connect the self-capacitance electrodes to the touch detection chip.

4. The in-cell touch panel according to claim 3, wherein the leads and the self-capacitance electrodes are arranged in different layers.

5. The in-cell touch panel according to claim 4, wherein an orthographic projection of a pattern of the lead on the second substrate is disposed at a gap between two adjacent pixel electrodes.

6. The in-cell touch panel according to claim 5, further comprising:

gate signal lines and data signal lines which intersect each other and are disposed on one side of the second substrate facing the first substrate, wherein

an extension direction of the leads is the same with that of the gate signal lines or the data signal lines.

7. The in-cell touch panel according to claim 6, wherein every two adjacent rows of pixel electrodes are taken as a pixel group;

two gate signal lines are disposed between the two adjacent rows of pixel electrodes and configured to provide gate scanning signals for the two adjacent rows of pixel electrodes respectively; and

the leads are disposed at gaps between adjacent pixel groups and arranged in the same layer as the gate signal lines.

8. The in-cell touch panel according to claim 6, wherein two gate signal lines are disposed between adjacent rows of pixel electrodes;

every two adjacent columns of pixel electrodes are taken as a pixel group and share a data signal line disposed between the two adjacent columns of pixel electrodes; and

the leads are disposed at gaps between adjacent pixel groups and arranged in the same layer as the date signal lines.

9. The in-cell touch panel according to claim 7, further comprising:

a plurality of metal wires arranged in the same layer as and insulated from the leads, wherein

the metal wire and the lead are disposed in the same straight line and connected in parallel with an overlapped self-capacitance electrode.

10. A display device, comprising the in-cell touch panel according to claim 1.

11. The in-cell touch panel according to claim 2, further comprising:

a plurality of leads configured to connect the self-capacitance electrodes to the touch detection chip.

12. The in-cell touch panel according to claim 11, wherein the leads and the self-capacitance electrodes are arranged in different layers.

13. The in-cell touch panel according to claim 12, wherein an orthographic projection of a pattern of the lead on the second substrate is disposed at a gap between two adjacent pixel electrodes.

14. The in-cell touch panel according to claim 13, further comprising:

gate signal lines and data signal lines which intersect each other and are disposed on one side of the second substrate facing the first substrate, wherein

an extension direction of the leads is the same with that of the gate signal lines or the data signal lines.

15. The in-cell touch panel according to claim 14, wherein every two adjacent rows of pixel electrodes are taken as a pixel group;

two gate signal lines are disposed between the two adjacent rows of pixel electrodes and configured to provide gate scanning signals for the two adjacent rows of pixel electrodes respectively; and

the leads are disposed at gaps between adjacent pixel groups and arranged in the same layer as the gate signal lines.

16. The in-cell touch pan&

according to claim 14, wherein two gate signal lines are disposed between adjacent rows of pixel electrodes;

every two adjacent columns of pixel electrodes are taken as a pixel group and share a data signal line disposed between the two adjacent columns of pixel electrodes; and

the leads are disposed at gaps between adjacent pixel groups and arranged hi the same layer as the date signal lines.

17. The in-cell touch panel according to claim 15, further comprising:

a plurality of metal wires arranged in the same layer as and insulated from the leads, wherein

the metal wire and the lead are disposed in the same straight line and connected in parallel with an overlapped self-capacitance electrode.

18. The in-cell touch panel according to claim 16, further comprising:

a plurality of metal wires arranged in the same layer as and insulated from the leads, wherein

the metal wire and the lead are disposed in the same straight line and connected in parallel with an overlapped self-capacitance electrode.

19. The in-cell touch panel according to claim 8, further comprising:

a plurality of metal wires arranged in the same layer as and insulated from the leads, wherein

the metal wire and the lead are disposed in the same straight line and connected in parallel with an overlapped self-capacitance electrode.