US 12,008,172 B2
Position detection device and program
Akira Ito, Saitama (JP)
Assigned to Wacom Co., Ltd., Saitama (JP)
Filed by Wacom Co., Ltd., Saitama (JP)
Filed on May 28, 2021, as Appl. No. 17/334,358.
Claims priority of application No. 2020-114195 (JP), filed on Jul. 1, 2020.
Prior Publication US 2022/0004266 A1, Jan. 6, 2022
Int. Cl. G06F 3/03 (2006.01); G06F 3/0346 (2013.01); G06F 3/0354 (2013.01); G06F 3/041 (2006.01); G06N 20/00 (2019.01)
CPC G06F 3/0317 (2013.01) [G06F 3/0346 (2013.01); G06F 3/03546 (2013.01); G06F 3/04162 (2019.05); G06N 20/00 (2019.01); G06F 2203/04104 (2013.01); G06F 2203/04105 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A position detection device comprising:
a communication circuit which, in operation, receives, from a stylus including a built-in acceleration sensor, acceleration information detected by the acceleration sensor; and
a controller which, in operation, detects a first position indicating a position of the stylus on a touch surface and a second position indicating a position of a finger on the touch surface, outputs the first position, determines whether there has been a change in the acceleration information received for a predetermined period of time by the communication circuit, and controls output of the second position based on whether there has been the change in the acceleration information received for the predetermined period of time by the communication circuit.