US 11,656,726 B1
Control circuit, electronic device, and control method for stylus pen interacting with touch panel
Yu-Ying Tang, Taoyuan (TW); and Chih Chang Lai, Taichung (TW)
Assigned to NOVATEK Microelectronics Corp., Hsinchu (TW)
Filed by NOVATEK Microelectronics Corp., Hsinchu (TW)
Filed on Feb. 9, 2022, as Appl. No. 17/650,382.
Int. Cl. G06F 3/044 (2006.01); G06F 3/041 (2006.01); G06F 3/038 (2013.01); G06F 3/0354 (2013.01)
CPC G06F 3/0442 (2019.05) [G06F 3/0383 (2013.01); G06F 3/03545 (2013.01); G06F 3/044 (2013.01); G06F 3/04162 (2019.05); G06F 3/04166 (2019.05)] 14 Claims
OG exemplary drawing
 
1. A control circuit, configured to control a first electrode structure on an electronic device to transmit a first transmitting signal to a touch panel,
wherein the control circuit is further configured to control a second electrode structure comprising a plurality of sub-electrodes disposed on and surrounding a ring portion of the electronic device to transmit a second transmitting signal to the touch panel during a first time interval, and configured to detect a touch event on the plurality of sub-electrodes of the second electrode structure during a second time interval,
wherein the control circuit is further configured to control the first electrode structure to transmit the first transmitting signal to the touch panel during a third time interval.