US 11,928,287 B2
Touch control chip, coding method and electronic device
Haiming Shen, Guangdong (CN); and Liangguang Peng, Guangdong (CN)
Assigned to SHENZHEN GOODIX TECHNOLOGY CO., LTD., Guangdong (CN)
Filed by SHENZHEN GOODIX TECHNOLOGY CO., LTD., Guangdong (CN)
Filed on Sep. 17, 2021, as Appl. No. 17/477,662.
Application 17/477,662 is a continuation of application No. PCT/CN2020/116092, filed on Sep. 18, 2020.
Prior Publication US 2022/0091720 A1, Mar. 24, 2022
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01); G09G 3/20 (2006.01)
CPC G06F 3/04184 (2019.05) [G06F 3/0441 (2019.05); G09G 3/20 (2013.01); G09G 2320/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A touch control chip, comprising:
a driving circuit configured to output a driving signal to a touch control layer of a screen, wherein there is an overlap between a period when the driving circuit outputs the driving signal and a display sensitive interval of a display layer of the screen, wherein the display sensitive interval comprises a pixel update interval of the display layer, and the pixel update interval is the time interval for a pixel in the display layer to receive a data signal; and
a control circuit configured to, during the period when the driving circuit outputs the driving signal, adjust a value of a driving impedance of the driving circuit in the display sensitive interval of the display layer to be greater than a value of the driving impedance in a time interval outside the display sensitive interval, so that a slope of a flipping edge of the driving signal in the display sensitive interval is smaller than a slope of the flipping edge of the driving signal in the time interval outside the display sensitive interval, wherein a peak amplitude of the driving signal in the display sensitive interval and in the time interval outside the display sensitive interval are equal.