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US 12,607,525 B2Granted
Force sensor with crosstalk reduction
AssigneeJapan Display Inc.
InventorHiroumi Kinjo
Life of this patent
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Abstract
A force sensor includes an array substrate having a first surface provided with a plurality of array electrodes, a counter substrate having an opposite surface facing the first surface, a guard electrode disposed on the first surface and extending between the array electrodes, a sensor layer made of a conductive elastomer and placed over the first surface, the array electrodes, and the guard electrode, and a common electrode provided on the opposite surface. The array substrate and the guard electrode are equipotential.
Claims15
A force sensor comprising:
- an array substrate having a first surface provided with a plurality of array electrodes;
- a counter substrate having an opposite surface facing the first surface;
- a guard electrode disposed on the first surface and extending between the array electrodes;
- a sensor layer made of a conductive elastomer and placed over the first surface, the array electrodes, and the guard electrode;
- and
- a common electrode provided on the opposite surface, wherein
- the array substrate and the guard electrode are equipotential,
- the sensor layer is a solid film entirely covering the first surface, the array electrodes, and the guard electrode,
- the array electrodes are arrayed in a first direction parallel to the first surface and in a second direction parallel to the first surface and intersecting the first direction,
- the guard electrode includes
- a plurality of first guard electrodes each extending in the first direction between the array electrodes adjacent to each other in the second direction, and
- a plurality of second guard electrodes each extending in the second direction between the array electrodes adjacent to each other in the first direction, and
- the array electrodes are disposed inside respective rectangular frames formed by the first guard electrodes and the second guard electrodes.
10 more elements
A force sensor comprising:
- an array substrate having a first surface provided with a plurality of array electrodes;
- a counter substrate having an opposite surface facing the first surface;
- a guard electrode disposed on the first surface and extending between the array electrodes;
- a sensor layer made of a conductive elastomer and placed over the first surface, the array electrodes, and the guard electrode;
- and
- a common electrode provided on the opposite surface, wherein
- the array substrate and the guard electrode are equipotential,
- the sensor layer is a solid film entirely covering the first surface, the array electrodes, and the guard electrode,
- the guard electrode includes a plurality of annular guard electrodes each having an annular shape, and
- the array electrodes are disposed inside the respective annular guard electrodes.
7 more elements
A force sensor comprising:
- an array substrate having a first surface provided with a plurality of array electrodes;
- a counter substrate having an opposite surface facing the first surface;
- a guard electrode disposed on the first surface and extending between the array electrodes;
- a sensor layer made of a conductive elastomer and placed over the first surface, the array electrodes, and the guard electrode;
- and
- a common electrode provided on the opposite surface, wherein
- the array substrate and the guard electrode are equipotential,
- the sensor layer is a solid film entirely covering the first surface, the array electrodes, and the guard electrode,
- the array electrodes are arrayed in a first direction parallel to the first surface and in a second direction parallel to the first surface and intersecting the first direction,
- the sensor layer includes a plurality of divided sensor layers divided in the first direction and extending in the second direction, and
- the guard electrode includes a plurality of intersecting guard electrodes extending in the first direction and intersecting the divided sensor layers when viewed from the common electrode.
8 more elements
Dependencies are inferred from the claim text.