US 11,886,657 B2
Method of palm rejection and sensor controller
Masayuki Miyamoto, Saitama (JP); and Hideyuki Hara, Saitama (JP)
Assigned to Wacom Co., Ltd., Saitama (JP)
Filed by Wacom Co., Ltd., Saitama (JP)
Filed on Mar. 9, 2023, as Appl. No. 18/181,362.
Application 18/181,362 is a continuation of application No. 17/388,851, filed on Jul. 29, 2021, granted, now 11,614,826.
Claims priority of application No. 2020-149621 (JP), filed on Sep. 7, 2020.
Prior Publication US 2023/0205356 A1, Jun. 29, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04162 (2019.05) [G06F 3/0442 (2019.05); G06F 3/04186 (2019.05); G06F 2203/04104 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of palm rejection executed by a sensor controller, wherein the sensor controller is connected to a plurality of sensor electrodes and includes a plurality of reception units each configured to receive, via the plurality of sensor electrodes, a downlink signal transmitted from an active pen, the method comprising:
determining, for each of the plurality of reception units, whether or not a phase of the received downlink signal matches a phase shared in advance between the sensor controller and the active pen, and
based on the downlink signal whose phase is determined to match the phase shared in advance between the sensor controller and the active pen, outputting a position of the active pen derived on a basis of a distribution of levels of the downlink signal in the plurality of sensor electrodes.