US 11,954,271 B2
Active stylus and method performed by active stylus
Weijen Chang, Tainan (TW); and Chin-Lin Lee, Hsinchu (TW)
Assigned to NOVATEK MICROELECTRONICS CORP., Hsinchu (TW)
Filed by NOVATEK MICROELECTRONICS CORP., Hsinchu (TW)
Filed on Mar. 3, 2023, as Appl. No. 18/117,003.
Claims priority of provisional application 63/316,413, filed on Mar. 4, 2022.
Prior Publication US 2023/0280843 A1, Sep. 7, 2023
Int. Cl. G06F 3/0354 (2013.01); G06F 3/038 (2013.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01); H04W 72/21 (2023.01)
CPC G06F 3/03545 (2013.01) [G06F 3/0383 (2013.01); G06F 3/04162 (2019.05); G06F 3/04182 (2019.05); G06F 3/0441 (2019.05); G06F 3/0442 (2019.05); H04W 72/21 (2023.01)] 16 Claims
OG exemplary drawing
 
1. An active stylus, comprising:
a touch sensor, arranged inside the active stylus and along at least a portion of an inner surface region of a pen body of the active stylus, the at least a portion of the inner surface region corresponding to a preset pen-holding region on an outer surface of the pen body, wherein, the touch sensor is insulated from the pen body, and when an external operating subject touches the preset pen-holding region and touches a touch panel, an uplink signal transmitted by the touch panel is coupled to the pen body via the external operating subject, as an uplink interference signal;
a receiver, configured to receive the uplink signal from the touch panel; and
a signal processing unit, configured to:
generate a compensation signal for compensating the uplink interference signal, and obtain a compensated interference signal generated based on the compensation signal and the uplink interference signal;
generate an uplink signal to be processed based on the received uplink signal and the compensated interference signal; and
obtain uplink information based on the uplink signal to be processed.