US 12,169,604 B2
Active pen, position detection system, and integrated circuit
Masayuki Miyamoto, Saitama (JP); Haruhiko Hisano, Saitama (JP); and Sadao Yamamoto, Saitama (JP)
Assigned to Wacom Co., Ltd., Saitama (JP)
Filed by Wacom Co., Ltd., Saitama (JP)
Filed on Aug. 28, 2023, as Appl. No. 18/457,132.
Application 18/457,132 is a continuation of application No. PCT/JP2021/032891, filed on Sep. 7, 2021.
Claims priority of application No. 2021-070522 (JP), filed on Apr. 19, 2021.
Prior Publication US 2023/0400944 A1, Dec. 14, 2023
Int. Cl. G06F 3/041 (2006.01); G06F 3/0354 (2013.01); G06F 3/044 (2006.01)
CPC G06F 3/04162 (2019.05) [G06F 3/03545 (2013.01); G06F 3/0441 (2019.05); G06F 3/0442 (2019.05)] 23 Claims
OG exemplary drawing
 
1. An active pen comprising:
a signal processing circuit which, in operation, transmits, at a second timing decided based on a first timing of reception of a first uplink signal received from a sensor controller, a position signal and a data signal from a pen-tip electrode, and receives a second uplink signal; and
a first wireless communication circuit which, in operation, wirelessly communicates with the sensor controller,
wherein the signal processing circuit, in operation, determines whether the second uplink signal has been received at the second timing, and in a case of determining that the second uplink signal has not been received, the signal processing circuit transmits at least part of the data signal via the first wireless communication circuit while transmitting the position signal from the pen-tip electrode.