US 12,086,358 B1
Touch status monitor in low power mode
Qiang Ma, Shenzhen (CN); and Yuan Yun Wang, New Taipei (TW)
Assigned to STMicroelectronics International N.V., Geneva (CH)
Filed by STMicroelectronics International N.V., Geneva (CH)
Filed on Nov. 2, 2023, as Appl. No. 18/500,782.
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/041662 (2019.05) [G06F 3/04186 (2019.05); G06F 3/0443 (2019.05); G06F 3/0446 (2019.05); G06F 2203/04106 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A touch status monitor method comprising:
detecting a touch on a touch screen when operating in a low-power detect scan mode;
in response to detecting the touch, switching from the low-power detect scan mode to a low-power active scan mode and labeling a current event of the detected touchas a touch down event;
in response to labeling the current event as the touch down event, applying a lock to prevent updating a baseline when entering the low-power detect scan mode; and
in response to detecting that the touch has left the touch screen, releasing the lock, labeling the current event as a touch up event, switching from the low-power active scan mode to the low-power detect scan mode, and updating the baseline.