Position detection sensor and position detection device

Patent metadata

Field	Value
Publication number	US-2025362762-A1
Application number	US-202519289800-A
Country	US
Kind code	A1
Filing date	Aug 4, 2025
Priority date	Mar 15, 2021
Publication date	Nov 27, 2025
Grant date	—

Abstract

The present disclosure is directed to a position detection sensor of an electromagnetic induction type connected to a position detection circuitry. The position detection sensor includes a circular substrate, a plurality of first loop coils arranged in a first direction on the circular substrate, and a plurality of second loop coils arranged in a second direction on the circular substrate, the second direction intersecting the first direction. Each of the plurality of first loop coils includes a straight portion extending in the second direction and a circumferential portion disposed along an outer edge of the circular substrate, and each of the plurality of second loop coils includes a straight portion extending in the first direction and a circumferential portion disposed along the outer edge of the circular substrate.

First claim

1 . A position detection sensor of an electromagnetic induction type, comprising:
a position detection area having a circular shape; and a plurality of first electrodes operated as coils and arranged side by side in a first direction; wherein at least some of the plurality of first electrodes each includes a straight portion extending in a second direction, which intersects the first direction, and a circumferential portion extending along an outer edge of the circular shape of the position detection area.

2 . The position detection sensor according to claim 1 , wherein the second direction is substantially perpendicular to the first direction.

3 . The position detection sensor according to claim 1 , further comprising:
a plurality of second electrodes operated as coils and arranged side by side in the second direction; wherein at least some of the plurality of second electrodes each includes a straight portion extending in the first direction and a circumferential portion extending along the outer edge of the circular shape of the position detection area.

4 . The position detection sensor according to claim 3 , wherein the second direction is substantially perpendicular to the first wherein.

5 . The position detection sensor according to claim 3 , wherein the plurality of first electrodes and the plurality of second electrodes are formed on a circular substrate.

6 . The position detection sensor according to claim 5 , wherein the plurality of first electrodes and the plurality of second electrodes are arranged on different surfaces of the circular substrate.

7 . The position detection sensor according to claim 1 , wherein the plurality of first electrodes are formed on a circular substrate.

8 . The position detection sensor according to claim 1 , wherein each of the plurality of first electrodes includes a sensor portion arranged in the circular shape of the position detection area and a routing portion leading to a position detection circuitry.

9 . The position detection sensor according to claim 1 , wherein the position detection area having the circular shape and the plurality of first electrodes are configured as a flexible printed circuit.

10 . The position detection sensor according to claim 1 , further comprising:
one or more outermost electrodes with one or more turns extending along the outer edge of the circular shape of the position detection area.

11 . An input device, comprising:
a display device including a display screen having a circular shape portion; and a position detection sensor of an electromagnetic induction type, including:
a position detection area having a circular shape; and
a plurality of second electrodes operated as coils and arranged side by side in a first direction;
wherein at least some of the first electrodes each includes a straight portion extending in a second direction, which intersects the first direction, and a circumferential portion extending along an outer edge of the circular shape of the position detection area.

12 . The input device according to claim 11 , wherein the second direction is substantially perpendicular to the first direction.

13 . The input device according to claim 11 , wherein the position detection sensor further includes:
a plurality of second electrodes operated as coils and arranged side by side in the second direction; wherein at least some of the plurality of second electrodes each includes a straight portion extending in the first direction and a circumferential portion extending along the outer edge of the circular shape of the position detection area.

14 . The input device according to claim 13 , wherein the second direction is substantially perpendicular to the first wherein.

15 . The input device according to claim 13 , wherein the plurality of first electrodes and the plurality of second electrodes are formed on a circular substrate.

16 . The input device according to claim 15 , wherein the plurality of first electrodes and the plurality of second electrodes are arranged on different surfaces of the circular substrate.

17 . The input device according to claim 11 , wherein the plurality of first electrodes are formed on a circular substrate.

18 . The input device according to claim 11 , wherein each of the plurality of first electrodes includes a sensor portion arranged in the circular shape of the position detection area and a routing portion leading to a position detection circuitry.

19 . The input device according to claim 11 , wherein the position detection area having the circular shape and the plurality of first electrodes are configured as a flexible printed circuit.

20 . The position detection sensor according to claim 11 , wherein the position detection sensor further includes:
one or more outermost electrodes with one or more turns extending along the outer edge of the circular shape of the position detection area.

Assignees

• Wacom Co Ltd

Inventors

• Matsuura Hikaru
• Izumisawa Takeru
• Ito Masamitsu

Classifications

• G05G9/047

  the controlling member being movable by hand about orthogonal axes, e.g. joysticks {(for switches H01H25/04)} · CPC title

• G06F3/046

  by electromagnetic means · CPC title

• G06F3/03545 Primary

  Pens or stylus · CPC title