# US 10,481,732 B2 · Press detecting touch panel and display device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,481,732 B2
- Document ID: US10481732B2
- Status: Granted
- Kind: B2
- Application number: 15/438,965
- Filed: 2017-02-22
- Published: 2017-06-08
- Granted: 2019-11-19
- Earliest claimed: 2014-09-04
- Assignees: Murata Manufacturing Co., Ltd.
- Applicants: Murata Manufacturing Co., Ltd.
- Inventors: Kenichi Mori; Masamichi Ando
- Web page: https://patentgrep.com/patent/US10481732B2

## CPC

- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer}
- G06F 2203/04105: Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A press detecting touch panel that includes a housing defining an opening, a piezoelectric film, and a holding member which holds the piezoelectric film within the opening. An entire periphery of the holding member is fixed to the housing such that the holding member covers the opening, and a first cross sectional shape along a first direction of the holding member is different than a second cross sectional shape along a second direction of the holding member.

## Claims

### Claim 1

A press detecting touch panel comprising:
a housing defining an opening;
a piezoelectric film; and
a holding member which holds the piezoelectric film within the opening, an entire periphery of the holding member being fixed to the housing such that the holding member covers the opening, a first cross sectional shape along a first direction of the holding member is different than a second cross sectional shape along a second direction of the holding member, the first direction and the second direction being orthogonal to each other, and a first curvature of a first main surface of the holding member is different from a second curvature of a second main surface of the holding member, the first main surface and the second main surface opposing each other, and each of the first main surface and the second main surface extending perpendicular to a stacking direction of the housing, the piezoelectric film and the holding member,
wherein, when the holding member is bent by a pressing force applied to the first main surface thereof, a warp in a horizontal direction is less than a warp in a vertical direction of the holding member.

### Claim 2 (depends on 1)

The press detecting touch panel according to claim 1, wherein the piezoelectric film is made of a uniaxially stretched chiral polymer.

### Claim 3 (depends on 1)

The press detecting touch panel according to claim 1, wherein the holding member has a non-uniform thickness.

### Claim 4 (depends on 1)

The touch panel according to claim 1, wherein a thickness of the holding member changes along at least one of the first direction and the second direction.

### Claim 5 (depends on 1)

The press detecting touch panel according to claim 1, wherein
the holding member comprises a plurality of laminated members, and
each of the plurality of laminated members has a different aspect ratio in a plan view of the press detecting touch panel.

### Claim 6 (depends on 5)

The press detecting touch panel according to claim 5, wherein the plurality of laminated members include a first panel which is fixed to the housing and a second panel attached to the first panel, the second panel having a smaller area than the first panel in the plan view.

### Claim 7 (depends on 1)

The press detecting touch panel according to claim 1, wherein a touch surface side of the holding member has a protrusion shape.

### Claim 8 (depends on 1)

The press detecting touch panel according to claim 1, wherein the holding member has a square shape in a plan view of the press detecting touch panel.

### Claim 9 (depends on 1)

The press detecting touch panel according to claim 1, wherein the holding member has a circular shape in a plan view of the press detecting touch panel.

### Claim 10 (depends on 1)

A display device comprising:
the press detecting touch panel according to claim 1; and
a display unit within the housing.