Patent ID: 11886657
Assignee: WACOM CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A sensor controller connected to a plurality of sensor electrodes, the sensor controller comprising:
a plurality of reception units each configured to receive, via the plurality of sensor electrodes, a downlink signal transmitted from an active pen; and
one or more processors configured to:
determine, 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, output 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.