US 12,254,156 B2
Palm rejection method for active pens and touch screen devices
Bin Fan, Baishan Town (CN); and Pengcheng Wen, Beijing (CN)
Assigned to STMicroelectronics International N.V., Geneva (CH)
Filed by STMicroelectronics International N.V., Geneva (CH)
Filed on Aug. 4, 2023, as Appl. No. 18/365,789.
Prior Publication US 2025/0044898 A1, Feb. 6, 2025
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04186 (2019.05) [G06F 3/04166 (2019.05); G06F 3/0441 (2019.05); G06F 3/0442 (2019.05); G06F 3/0446 (2019.05)] 20 Claims
OG exemplary drawing
 
1. A method of operating a touch screen panel, the method comprising:
initiating a communication between the panel and an active pen;
determining a touch zone of the panel, the touch zone including communication channels that are operating by touch while bi-directional communication is occurring between the panel and active pen;
disabling communications channels within the touch zone;
performing communication between the panel and the active pen while the communications channels within the touch zone are disabled;
determining that the communication between the panel and the active pen has stopped;
setting a timer to run for a set time delay;
continuing to disable the communications channels within the touch zone during the set time delay while no communication occurs between the panel and the active pen; and
enabling the communication channels within the touch zone when the set time delay expires.