Method of palm rejection and sensor controller
AssigneeWacom Co., Ltd.
InventorsMasayuki Miyamoto, Hideyuki Hara
Life of this patent
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Abstract
A method of palm rejection is executed by a sensor controller that is connected to a plurality of sensor electrodes and that detects a downlink signal transmitted from an active pen. The method includes determining whether or not a phase of the detected downlink signal matches a phase shared in advance between the sensor controller and the active pen, and outputting, when it is determined that the phases match, a position of the active pen derived on the basis of a distribution of levels of the downlink signal in the plurality of sensor electrodes.
Claims16
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.
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.
Dependencies are inferred from the claim text.