Touch display panel and method for driving the touch display panel and device for driving the touch display panel

• US 10,521,042 B2
• Filed: 11/30/2015
• Issued: 12/31/2019
• Est. Priority Date: 12/05/2014
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Lu, Jianing, Zhang, Yuanbo
• Primary Examiner(s): Park, Sanghyuk
• Application Number:
  US15/308,385
• Publication Number:
  US 20170052637A1
• Time in Patent Office: 1,492 Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally

Abstract

The present disclosure relates to a touch display panel, a method and a device for driving the touch display panel. The method is applied to the touch display panel which includes L gate lines arranged sequentially and M touch scan lines arranged sequentially, where both L and M are positive integers larger than 1. The method includes dividing a duration for which the touch display panel displays each frame of image into N control time intervals with each of the N control time intervals including a display refresh time and a touch time arranged sequentially, where N is an integer larger than 1, during the duration for which the touch display panel displays each frame of image, driving the L gate lines sequentially in N display refresh times, and driving the M touch scan lines sequentially for K times in N touch times, where K is larger than 1.

Claims

1. A method for driving a touch display panel which comprises L gate lines arranged sequentially and M touch scan lines arranged sequentially, where both L and M are positive integers larger than 1, the method comprising:

dividing a duration for which the touch display panel displays each frame of image into N control time intervals with each of the N control time intervals comprising a display refresh time and a touch time arranged sequentially, where N is an integer larger than 1;

during the duration for which the touch display panel displays each frame of image, driving the L gate lines sequentially in N display refresh times, and driving the M touch scan lines sequentially for K times in N touch times, where K is larger than 1;

wherein N is an integer larger than M, and the L gate lines are divided into N gate line groups according to arrangement orders of the L gate lines;

during the duration for which the touch display panel displays each frame of image, one of the gate line groups is driven in each display refresh time, and one of the touch scan lines is driven in each touch time;

when the display refresh time of a previous frame is completed, scanning a P-th touch scan line, where P is a positive integer smaller than or equal to M;

when P is smaller than M, starting a driving operation from a (P+1)-th touch scan line when the display refresh time of a next frame is started; and

when P is equal to M, starting a driving operation from a first touch scan line when the display refresh time of the next frame is started;

wherein a quantity of the touch scan lines driven in the duration for which the touch display panel displays each frame of image is not a multiple of M.

2. The method according to claim 1, wherein, in different control time intervals, a time span of each display refresh time is equal and a time span of each touch time is also equal.

3. The method according to claim 1, further comprising:

setting a first noise pulse capture time interval between every two adjacent durations each for displaying one frame of image; and

capturing display data signal noise, power supply interference noise and/or thermal noise as noise pulses in the first noise pulse capture time interval.

4. The method according to claim 3, further comprising:

setting a second noise pulse capture time interval after driving to the M touch scan lines is completed during the duration for displaying each frame of image; and

capturing the display data signal noise, the power supply interference noise and/or the thermal noise as the noise pulses in the second noise pulse capture time interval.

5. The method according to claim 1, wherein the touch display panel is an in-cell type touch display panel.

6. The method according to claim 1, wherein L is a multiple of N, and N is smaller than 2M.

7. A device for driving a touch display panel which comprises L gate lines arranged sequentially and M touch scan lines arranged sequentially, where both L and M are positive integers larger than 1, the device comprising:

a clock unit configured to divide a duration for which the touch display panel displays each frame of image into N control time intervals with each of the control time intervals comprising a display refresh time and a touch time arranged sequentially, where N is an integer larger than 1;

a display control unit configured to, during the duration for which the touch display panel displays each frame of image, drive the L gate lines sequentially in N display refresh times; and

a touch control unit configured to, during the duration for which the touch display panel displays each frame of image, drive the M touch scan lines sequentially for K times in N touch times, where K is larger than 1;

wherein N is an integer larger than M, and the L gate lines are divided into N gate line groups according to arrangement orders of the L gate lines;

the display control unit is specifically configured to, during the duration for which the touch display panel displays each frame of image, drive one of the gate line groups in each of the display refresh times; and

the touch control unit is specifically configured to, during the duration for which the touch display panel displays each frame of image, drive one of the touch scan lines in each of the touch times;

wherein the touch control unit is further configured to, when the display refresh time of a previous frame is completed, scan a P-th touch scan line, where P is a positive integer smaller than or equal to M;

when P is smaller than M, the touch control unit is further configured to start a driving operation from a (P+1)-th touch scan line when the display refresh time of a next frame is started; and

when P is equal to M, the touch control unit is further configured to start a driving operation from a first touch scan line when the display refresh time of the next frame is started;

wherein a quantity of the touch scan lines driven in the duration for which the touch display panel displays each frame of image is not a multiple of M.

8. The device according to claim 7, wherein, in different control time intervals, a time span of each display refresh time is equal and a time span of each touch time is also equal.

9. The device according to claim 7, wherein the touch display panel is an in-cell type touch display panel.

10. The device according to claim 7, wherein L is a multiple of N, and N is smaller than 2M.

11. A touch display panel, comprising:

L gate lines arranged sequentially, where L is a positive integer larger than 1;

M touch scan lines arranged sequentially, where M is a positive integer larger than 1; and

a device for driving the touch display panel, wherein the device comprises;

a clock unit configured to divide a duration for which the touch display panel displays each frame of image into N control time intervals with each of the control time intervals comprising a display refresh time and a touch time arranged sequentially, where N is an integer larger than 1;

a display control unit configured to, during the duration for which the touch display panel displays each frame of image, drive the L gate lines sequentially in N display refresh times; and

a touch control unit configured to, during the duration for which the touch display panel displays each frame of image, drive the M touch scan lines sequentially for K times in N touch times, where K is larger than 1;

wherein N is an integer larger than M, and the L gate lines are divided into N gate line groups according to arrangement orders of the L gate lines;

the display control unit is specifically configured to, during the duration for which the touch display panel displays each frame of image, drive one of the gate line groups in each of the display refresh times; and

the touch control unit is specifically configured to, during the duration for which the touch display panel displays each frame of image, drive one of the touch scan lines in each of the touch times;

the touch control unit is further configured to, when the display refresh time of a previous frame is completed, scan a P-th touch scan line, where P is a positive integer smaller than or equal to M;

when P is smaller than M, the touch control unit is further configured to start a driving operation from a (P+1)-th touch scan line when the display refresh time of a next frame is started; and

when P is equal to M, the touch control unit is further configured to start a driving operation from a first touch scan line when the display refresh time of the next frame is started;

wherein a quantity of the touch scan lines driven in the duration for which the touch display panel displays each frame of image, is not a multiple of M.

12. The touch display panel according to claim 11, wherein, in different control time intervals, a time span of each display refresh time is equal and a time span of each touch time is also equal.

13. The touch display panel according to claim 11, wherein L is a multiple of N, and N is smaller than 2M.