Built-in touch display device and method for driving the same

• US 9,665,227 B2
• Filed: 10/24/2014
• Issued: 05/30/2017
• Est. Priority Date: 07/10/2014
• 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: Dong, Xue, Wang, Haisheng, Liu, Yingming, Ding, Xiaoliang
• Primary Examiner(s): Zhou, Hong
• Application Number:
  US14/761,573
• Publication Number:
  US 20160282981A1
• Time in Patent Office: 949 Days
• 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

The present disclosure provides a built-in touch display device and a method for driving the same. Each of a plurality of shielding layers may be arranged between each of the plurality of data lines and each of a plurality of touch driving electrodes. A touch driving signal may be transmitted to the corresponding touch driving electrode when the plurality of first gate line groups corresponding to the common electrodes is in an ON state, and the transmitting of the touch driving signal to the corresponding touch driving electrode may be stopped when the plurality of second gate line groups corresponding to the touch driving electrodes is in an ON state.

Claims

1. A built-in touch display device, comprising a first substrate, on which a plurality of data lines, and a plurality of common electrodes and a plurality of touch driving electrodes arranged to be spaced apart from each other and in an alternate manner on a same layer, are provided, wherein the plurality of common electrodes corresponds to a plurality of first gate line groups respectively, and the plurality of touch driving electrodes corresponds to a plurality of second gate line groups respectively,

wherein the first substrate further comprises:

a plurality of shielding layers, each of which is arranged between each of the plurality of data lines and a corresponding one of the plurality of touch driving electrodes; and

a plurality of touch driving signal transmission lines, arranged in one-to-one correspondence with the plurality of touch driving electrodes,

wherein each of the touch driving signal transmission lines is electrically connected to a corresponding one of the plurality of touch driving electrodes, and configured to transmit a touch driving signal to the corresponding touch driving electrode when any one of the plurality of first gate line groups corresponding to the common electrodes is in an ON state, and stop transmitting the touch driving signal to the corresponding touch driving electrode when any one of the plurality of second gate line groups corresponding to the touch driving electrodes is in an ON state.

2. The built-in touch display device according to claim 1, wherein the shielding layers each comprises a plurality of stripe patterns.

3. The built-in touch display device according to claim 2, wherein a first data line of the plurality of data lines corresponds to a first stripe pattern of the plurality of stripe patterns;

and

a projection region of the first data line on the first substrate is within a projection region of the first stripe pattern corresponding to the data line on the first substrate.

4. The built-in touch display device according to claim 3, further comprising:

a counter, arranged to count a row number of a gate line being in the ON state currently;

a determination module, arranged to determine whether the gate line being in the ON state currently belongs to the first gate line groups or the second gate line groups based on the row number counted by the counter; and

a control module, arranged to send a first signal to a touch chip for controlling the touch chip to transmit the touch driving signal to a corresponding one of the touch driving signal transmission lines when the determination module determines that a gate line being in the ON state currently belongs to the first gate line groups, and send a second signal to a touch chip for controlling the touch chip to stop transmitting the touch driving signal to the corresponding one of the touch driving signal transmission lines when the determination module determines that the gate line being in the ON state currently belongs to the second gate line groups.

5. The built-in touch display device according to claim 2, wherein one of the plurality of data lines corresponds to the plurality of stripe patterns;

and

the plurality of stripe patterns corresponding to the one data line is arranged on the shielding layer at a position corresponding to a region where a projection of the one data line overlaps a projection of the corresponding touch driving electrode.

6. The built-in touch display device according to claim 5, further comprising:

a counter, arranged to count a row number of a gate line being in the ON state currently;

a determination module, arranged to determine whether the gate line being in the ON state currently belongs to the first gate line groups or the second gate line groups based on the row number counted by the counter; and

a control module, arranged to send a first signal to a touch chip for controlling the touch chip to transmit the touch driving signal to a corresponding one of the touch driving signal transmission lines when the determination module determines that a gate line being in the ON state currently belongs to the first gate line groups, and send a second signal to a touch chip for controlling the touch chip to stop transmitting the touch driving signal to the corresponding one of the touch driving signal transmission lines when the determination module determines that the gate line being in the ON state currently belongs to the second gate line groups.

7. The built-in touch display device according to claim 2, further comprising:

a counter, arranged to count a row number of a gate line being in the ON state currently;

a determination module, arranged to determine whether the gate line being in the ON state currently belongs to the first gate line groups or the second gate line groups based on the row number counted by the counter; and

a control module, arranged to send a first signal to a touch chip for controlling the touch chip to transmit the touch driving signal to a corresponding one of the touch driving signal transmission lines when the determination module determines that a gate line being in the ON state currently belongs to the first gate line groups, and send a second signal to a touch chip for controlling the touch chip to stop transmitting the touch driving signal to the corresponding one of the touch driving signal transmission lines when the determination module determines that the gate line being in the ON state currently belongs to the second gate line groups.

8. The built-in touch display device according to claim 1, wherein the shielding layers are each made of a transparent and conductive material.

9. The built-in touch display device according to claim 8, wherein the shielding layers are each made of Indium Tin Oxide (ITO).

10. The built-in touch display device according to claim 8, further comprising:

a counter, arranged to count a row number of a gate line being in the ON state currently;

a determination module, arranged to determine whether the gate line being in the ON state currently belongs to the first gate line groups or the second gate line groups based on the row number counted by the counter; and

a control module, arranged to send a first signal to a touch chip for controlling the touch chip to transmit the touch driving signal to a corresponding one of the touch driving signal transmission lines when the determination module determines that a gate line being in the ON state currently belongs to the first gate line groups, and send a second signal to a touch chip for controlling the touch chip to stop transmitting the touch driving signal to the corresponding one of the touch driving signal transmission lines when the determination module determines that the gate line being in the ON state currently belongs to the second gate line groups.

11. The built-in touch display device according to claim 1, wherein each of the shielding layers is connected to a corresponding signal input end having a constant level.

12. The built-in touch display device according to claim 11, wherein, for each of the shielding layers, the corresponding signal input end is one of the common electrodes.

13. The built-in touch display device according to claim 1, further comprising:

a counter, arranged to count a row number of a gate line being in the ON state currently;

a determination module, arranged to determine whether the gate line being in the ON state currently belongs to the first gate line groups or the second gate line groups based on the row number counted by the counter; and

a control module, arranged to send a first signal to a touch chip for controlling the touch chip to transmit the touch driving signal to a corresponding one of the touch driving signal transmission lines when the determination module determines that a gate line being in the ON state currently belongs to the first gate line groups, and send a second signal to a touch chip for controlling the touch chip to stop transmitting the touch driving signal to the corresponding one of the touch driving signal transmission lines when the determination module determines that the gate line being in the ON state currently belongs to the second gate line groups.

14. The built-in touch display device according to claim 13, wherein the control module is connected to a high level input end and a low level input end respectively;

when the determination module determines that the gate line being in the ON state currently belongs to the first gate line groups, the control module is electrically connected to the high level input end, and transmits a high level signal inputted by the high level input end to the touch chip; and

when the determination module determines that the gate line being in the ON state currently belongs to the second gate line groups, the control module is electrically connected to the low level input end, and transmits a low level signal inputted by the low level input end to the touch chip.

15. The built-in touch display device according to claim 13, wherein the counter, the determination module and the control module are integrated in a data dictionary of the built-in touch display device.

16. The built-in touch display device according to claim 1, further comprising a second substrate,

wherein a plurality of detection electrodes is provided on the second substrate.

17. The built-in touch display device according to claim 16, wherein the detection electrodes and the touch driving electrodes intersect at a substantially right angle.

18. A method for driving a built-in touch display device, comprising steps of:

counting a row number of a gate line being in an ON state currently;

determining whether the gate line being in the ON state currently belongs to first gate line groups or second gate line groups based on the row number, wherein the first gate line groups correspond to common electrodes respectively, the second gate line groups correspond to touch driving electrodes respectively, and the common electrodes and the touch driving electrodes are arranged to be spaced apart from each other on a same layer and in an alternate manner; and

controlling a touch chip to transmit a touch driving signal to a corresponding touch driving signal transmission line when the gate line being in the ON state currently belongs to the first gate line groups, and controlling the touch chip to stop transmitting the touch driving signal to the corresponding touch driving signal transmission line when the gate line being in the ON state currently belongs to the second gate line groups.

19. The method according to claim 18, wherein the step of controlling the touch chip to transmit the touch driving signal to the corresponding touch driving signal transmission line comprises:

transmitting a high level signal to the touch chip to control the touch chip to transmit the touch driving signal to the corresponding touch driving signal transmission line.

20. The method according to claim 18, wherein the step of controlling the touch chip to stop transmitting the touch driving signal to the corresponding touch driving signal transmission line comprises:

transmitting a low level signal to the touch chip to control the touch chip to stop transmitting the touch driving signal to the corresponding touch driving signal transmission line.