Position detection device and position detection system
AssigneeWacom Co., Ltd.
InventorKoji NOGUCHI
Life of this patent
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Abstract
The disclosure makes it possible to detect a position of an electromagnetic induction pen in a shorter time than in the past. A position detection device includes a plurality of loop coils arranged side by side in an x-direction, and a sensor controller that detects an amplitude of an alternating current signal generated in each of the plurality of loop coils, while supplying an alternating current signal to each of the plurality of loop coils, and detects a position of an electromagnetic induction pen in the x-direction based on the amplitude of the alternating current signal detected in each of the plurality of loop coils.
Claims14
A position detection device comprising:
- a plurality of first loop coils arranged in a first direction;
- and
- a sensor controller that, in operation,
- detects an amplitude of a first alternating current signal generated in each of the plurality of first loop coils while a second alternating current signal is supplied to each of the plurality of first loop coils, and
- detects a position of an electromagnetic induction pen in the first direction, based on the amplitude detected in each of the plurality of first loop coils.
A position detection system comprising:
- an electromagnetic induction pen;
- and
- a position detection device,
- wherein the electromagnetic induction pen includes a resonant circuit having a coil and a capacitor, and
- wherein the position detection device includes:
- a plurality of first loop coils arranged in a first direction, and
- a sensor controller that. in operation,
- detects an amplitude of a first alternating current signal generated in each of the plurality of first loop coils while supplying a second alternating current signal to each of the plurality of first loop coils, and
- detects a position of the electromagnetic induction pen in the first direction, based on the amplitude detected in each of the plurality of first loop coils.
Dependencies are inferred from the claim text.