US 12,189,889 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 Dec. 19, 2023, as Appl. No. 18/545,840.
Application 18/545,840 is a continuation of application No. 18/181,362, filed on Mar. 9, 2023, granted, now 11,886,657.
Application 18/181,362 is a continuation of application No. 17/388,851, filed on Jul. 29, 2021, granted, now 11,614,826, issued on Mar. 28, 2023.
Claims priority of application No. 2020-149621 (JP), filed on Sep. 7, 2020.
Prior Publication US 2024/0118764 A1, Apr. 11, 2024
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 3/04186 (2019.05); G06F 3/0442 (2019.05); G06F 2203/04104 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A sensor controller that is connected to a plurality of sensor electrodes and that detects a downlink signal having a predetermined frequency or a predetermined waveform transmitted from an active pen, wherein the sensor controller comprises:
a memory; and
one or more processors coupled to the memory and configured to:
compare a phase of the detected downlink signal and a phase shared in advance between the sensor controller and the active pen, and
output, responsive to a result of the comparison of the phases, a position of the active pen based on the downlink signal detected in the plurality of sensor electrodes.