Patent ID: 11928287
Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
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.