Touch control driving method, touch control driving apparatus and touch control display device

• US 9,880,661 B2
• Filed: 12/29/2015
• Issued: 01/30/2018
• Est. Priority Date: 08/07/2015
• 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, Xiurong, Shi, Lingyun, Zhang, Hao, Gao, Bo, Li, Yafei, Han, Peng
• Primary Examiner(s): MISHLER, ROBIN J
• Application Number:
  US15/307,127
• Publication Number:
  US 20170185213A1
• Time in Patent Office: 763 Days
• CPC Class Codes: G06F 1/32 Means for saving power
• CPC Class Codes: G06F 1/3262 Power saving in digitizer or tablet
• 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 3/0443 using a single layer of sensing electrodes

Abstract

The embodiments of the present disclosure provide a touch control driving method, a touch control driving apparatus and a touch control display device, capable of reducing power consumption of a touch screen. The method comprises: inputting a touch control driving signal at a first scan frequency for touch control scan; detecting a writing frequency of a Random Access Memory (RAM) and a duration for the writing frequency; and reducing the first scan frequency to a second scan frequency when the writing frequency of the RAM is larger than or equal to a first threshold and the duration for the writing frequency is larger than or equal to a second threshold. The method can be applied in a process of touch control driving.

Claims

1. A touch control driving method, comprising:

inputting a touch control driving signal at a first scan frequency for touch control scan;

detecting a writing frequency of a Random Access Memory (RAM) and a duration for the writing frequency; and

reducing the first scan frequency to a second scan frequency when the writing frequency of the RAM is larger than or equal to a first threshold and the duration for the writing frequency is larger than or equal to a second threshold.

2. The method of claim 1, wherein the first scan frequency is N times the second scan frequency, where N is an integer larger than 1.

3. The method of claim 1, wherein the first threshold has a value ranging from 25 frames per second to 30 frames per second.

4. The method of claim 1, wherein the second threshold is 5 seconds.

5. The method of claim 1, wherein said detecting the writing frequency of the RAM and the duration for the writing frequency comprises:

detecting the writing frequency of the RAM; and

recording the duration for the writing frequency when the writing frequency of the RAM is larger than or equal to the first threshold.

6. The method of any of claim 1, further comprising, subsequent to said reducing the first scan frequency to the second scan frequency:

restoring the second scan frequency to the first scan frequency upon detection of a touch action triggered by a user.

12. The method of claim 2, further comprising, subsequent to said reducing the first scan frequency to the second scan frequency:

restoring the second scan frequency to the first scan frequency upon detection of a touch action triggered by a user.

13. The method of claim 3, further comprising, subsequent to said reducing the first scan frequency to the second scan frequency:

restoring the second scan frequency to the first scan frequency upon detection of a touch action triggered by a user.

14. The method of claim 4, further comprising, subsequent to said reducing the first scan frequency to the second scan frequency:

restoring the second scan frequency to the first scan frequency upon detection of a touch action triggered by a user.

7. A touch control driving apparatus, comprising:

a scan unit configured to input a touch control driving signal at a first scan frequency for touch control scan;

a detection unit configured to detect a writing frequency of a Random Access Memory (RAM) and a duration for the writing frequency; and

a frequency conversion unit configured to reduce the first scan frequency to a second scan frequency when the writing frequency of the RAM is larger than or equal to a first threshold and the duration for the writing frequency is larger than or equal to a second threshold.

8. The apparatus of claim 7, further comprising a memory unit, wherein

the detection unit is further configured to detect the writing frequency of the RAM and store it in the memory unit and record the duration for the writing frequency in the memory unit when the writing frequency of the RAM is larger than or equal to the first threshold.

9. The apparatus of claim 7, wherein the frequency conversion unit is further configured to restore the second scan frequency to the first scan frequency upon detection of a touch action triggered by a user.

10. The apparatus of claim 7, wherein the touch control driving apparatus is a driver Integrated Circuit (IC).

11. A touch control display device, comprising the touch control driving apparatus according to claim 7.

15. A touch control display device, comprising the touch control driving apparatus according to claim 8.

16. A touch control display device, comprising the touch control driving apparatus according to claim 9.

17. A touch control display device, comprising the touch control driving apparatus according to claim 10.