US 12,436,643 B2
Capacitive touch control system detecting stylus pen and finger
Ming-Hung Tsai, Hsin-Chu County (TW); and Sung-Han Wu, Hsin-Chu County (TW)
Assigned to PIXART IMAGING INC., Hsin-Chu County (TW)
Filed by PixArt Imaging Inc., Hsin-Chu County (TW)
Filed on May 9, 2024, as Appl. No. 18/659,022.
Application 18/659,022 is a continuation in part of application No. 18/224,587, filed on Jul. 21, 2023, granted, now 12,216,861.
Application 18/224,587 is a continuation of application No. 17/739,768, filed on May 9, 2022, granted, now 11,747,939.
Prior Publication US 2024/0288969 A1, Aug. 29, 2024
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04166 (2019.05) [G06F 3/044 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A capacitive touch control system, configured to receive a stylus pen signal, the capacitive touch control system comprising:
a touch panel, comprising multiple pixels arranged in a matrix, and configured to time-divisionally detect a beacon frequency of a beacon symbol of the stylus pen signal within a first detection interval and perform a touch detection within a second detection interval within a beacon length interval of the beacon symbol, wherein
the first detection interval is larger than a reciprocal of the beacon frequency.