Patent ID: 11880517
Assignee: WACOM CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 5:
6. The position detection device according to claim 5, further comprising:
a position detection sensor including a plurality of first loop coils disposed in a first direction and a plurality of second loop coils disposed in a second direction crossing the first direction and configured to detect a position indicated by the electronic pen in an operation region, the planar coil being disposed outside of the operation region in which the position indicated by the electronic pen is detectable by the position detection sensor;
a second control circuit which, in operation, performs control to specify a specified first loop coil which is to transmit a third signal from among the plurality of first loop coils and the plurality of second loop coils and supply the third signal to the specified first loop coil, and specify a specified second loop coil which is to receive a fourth signal from among the plurality of first loop coils and the plurality of second loop coils and receive the fourth signal through the specified second loop coil;
a position detection control circuit which, in operation, controls, while the first detection circuit detects that the electronic pen is accommodated in the accommodation portion, at least the second control circuit to stop operating; and
a second detection circuit which, in operation, detects the position indicated by the electronic pen on the position detection sensor based on the fourth signal from the specified second loop coil.