Touch display device and a driving method thereof

• US 9,513,731 B2
• Filed: 12/14/2013
• Issued: 12/06/2016
• Est. Priority Date: 07/17/2013
• 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, Zhang, Hao, Zhao, Weijie, Xie, Xiaobo
• Primary Examiner(s): PATEL, PREMAL R
• Application Number:
  US14/385,039
• Publication Number:
  US 20160132140A1
• Time in Patent Office: 1,088 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• 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 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G09G 2310/04 Partial updating of the display screen
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 3/2092 Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165

Abstract

The present application relates to a touch display device and a driving method for the same, which can improve the report rate of the touch display device. The driving method for the touch display device comprises: setting a display period to at least comprise two sub-display periods and a touch period to at least comprise two sub-touch periods, and arranging the sub-display periods and the sub-touch periods so that there is one sub-touch period interleaved between two adjacent sub-display periods; by a control signal, controlling the touch display device to enter the sub-touch periods from the sub-display periods, and controlling the touch display device to send out a touch signal; and by the control signal and a driving signal, controlling the touch display device to enter the sub-display periods from the sub-touch periods, and thus enabling the touch display device to display a display picture.

Claims

1. A driving method for a touch display device, wherein one frame of the touch display device comprises a display period and a touch period, the method comprising,

setting the display period to at least comprise a first sub-display period and a second sub-display period, and the touch period to at least comprise a first sub-touch period and a second sub-touch period, and interleaving one sub-touch period between two adjacent sub-display periods;

controlling the touch display device by a control signal and a drive signal to enable the touch display device to enter the sub-display periods from the sub-touch periods, wherein the drive signal is input to a gate shift register unit which is cascaded and delivered cascade by cascade, so as to display a display picture during the sub-display periods;

controlling the touch display device by the control signal to enable the touch display device to enter the sub-touch periods from the sub-display periods, and during the sub-touch periods, controlling the touch display device by the control signal to enable the touch display device to send out a touch signal and the gate shift register unit to suspend; and

wherein, the drive signal is input to a first cascade of gate shift register unit and delivered cascade by cascade, so as to display the first part of the display picture during the first sub-display period;

the drive signal stays in the certain cascade of the gate shift register unit during the sub-touch period; and

the drive signal continues to be input to a next cascade of gate shift register unit and delivered cascade by cascade, so as to display the following part of the display picture during the second sub-display period.

2. The driving method of a touch display device according to claim 1, wherein,

by the control signal which is a high level signal, the touch display device is controlled to enter the sub-touch periods from the sub-display periods, and the touch display device is controlled to send out the touch signal during the sub-touch periods;

by the control signal which is a low level signal and the drive signal which is a high level signal, the touch display device is controlled to enter the sub-display periods from the sub-touch periods to display the display picture during the sub-display periods.

3. The driving method of a touch display device according to claim 2, wherein,

the display period comprises two sub-display periods, that is, the first sub-display period and the second sub-display period, and the durations of the first sub-display period and the second sub-display period are equal to each other, and the touch display device displays half of the display picture during the first sub-display period or the second sub-display period;

and

the touch period comprises two sub-touch periods, i.e., the first sub-touch period and the second sub-touch period, and the durations of the first sub-touch period and the second sub-touch period are equal to each other.

4. The driving method of a touch display device according to claim 3, wherein,

the durations of the first sub-touch period and the second sub-touch period are both 2 ms.

5. The driving method of a touch display device according to claim 1, wherein,

the durations of the first sub-display period and the second sub-display period are equal to each other, and the touch display device displays half of the display picture during the first sub-display period or the second sub-display period;

and

the durations of the first sub-touch period and the second sub-touch period are equal to each other.

6. The driving method of a touch display device according to claim 5, wherein,

the durations of the first sub-touch period and the second sub-touch period are both 2 ms.

7. The driving method of a touch display device according to claim 1, wherein,

during the sub-touch period, the touch display device does not display the display picture.

8. The driving method of a touch display device according to claim 1, wherein,

during the sub-display period, the touch display device does not send out the touch signal.

9. A touch display device, one frame of the touch display device comprising a display period and a touch period, wherein,

the display period at least comprises a first sub-display period and a second sub-display period, the touch period at least comprises a first sub-touch period and a second sub-touch period and there is one sub-touch period interleaved between two adjacent sub-display periods;

the touch display device comprises a display circuit, a touch circuit and a control circuit, and the control circuit sends out a control signal, and at the same time, the display circuit sends out a drive signal, which controls the display circuit to display a display picture, wherein the drive signal is input to a gate shift register unit which is cascaded and delivered cascade by cascade, so that the touch display device enters the sub-display periods from the sub-touch periods;

the control circuit sends out the control signal which controls the touch circuit to send out a touch signal and the gate shift register unit to suspend, so that the touch display device enters the sub-touch periods from the sub-display periods; and

wherein, the drive signal is input to a first cascade of gate shift register unit and delivered cascade by cascade, so as to display the first part of the display picture during the first sub-display period;

the drive signal stays in a certain cascade of the gate shift register unit during the sub-touch period; and

the drive signal continues to be input to a next cascade of the gate shift unit and delivered cascade by cascade, so as to display the following part of the display picture during the second sub-display period.

10. The touch display device according to claim 9, wherein,

when the control signal sent out by the control circuit is a high level signal, the touch circuit is controlled to send out the touch signal, so that the touch display device enters the sub-touch periods from the sub-display periods;

when the control signal sent out by the control circuit is a low level signal and the drive signal sent out by the display circuit is a high level signal, the display circuit is controlled to display the display picture, so that the touch display device enters the sub-display periods from the sub-touch periods.

11. The touch display device according to claim 10, wherein,

the display period comprises two sub-display periods, i.e., the first sub-display period and the second sub-display period, and the durations of the first sub-display period and the second sub-display period are equal to each other, and the display circuit displays half of the display picture during the first sub-display period or the second sub-display period;

and

the touch period comprises two sub-touch periods, i.e., the first sub-touch period and the second sub-touch period, and the durations of the first sub-touch period and the second sub-touch period are equal to each other.

12. The touch display device according to claim 11, wherein,

the durations of the first sub-touch period and the second sub-touch period are both 2 ms.

13. The touch display device according to claim 9, wherein,

the durations of the first sub-display period and the second sub-display period are equal to each other, and the display circuit displays half of the display picture during the first sub-display period or the second sub-display period;

and

the durations of the first sub-touch period and the second sub-touch period are equal to each other.

14. The touch display device according to claim 13, wherein,

the durations of the first sub-touch period and the second sub-touch period are both 2 ms.

15. The touch display device according to claim 9, wherein,

during the sub-touch period, the display circuit does not display the display picture.

16. The touch display device according to claim 9, wherein,

during the sub-display period, the touch circuit does not send out touch signal.