Pressure detector and touch panel provided with pressure detector
US9519378B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2014 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Mar 12, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04105
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
[Object] To provide a pressure detector capable of accurately detecting a pressing force.[Solution] A pressure detector according to the present invention includes a first piezoelectric sheet 3a, a second piezoelectric sheet 3b located so as to be close to or in contact with the first piezoelectric sheet 3a, and a detection electrode 4 that sandwiches the first piezoelectric sheet 3a and the second piezoelectric sheet 3b. The first piezoelectric sheet 3a and the second piezoelectric sheet 3b are composed of materials having identical characteristics and have a thickness of 5 μm to 50 μm. Potential differences respectively generated between surfaces on a support substrate 1 side and surfaces opposite to the support substrate 1 of the first piezoelectric sheet 3a and the second piezoelectric sheet 3b when the first piezoelectric sheet 3a and the second piezoelectric sheet 3b are pulled in an in-plane direction have a relationship expressed by expression 1: V1/V2<0. In expression 1, V1 and V2 represent potential differences respectively generated between the surfaces on the support substrate 1 side and the surfaces opposite to the support substrate 1 of the first piezoelectric sheet 3…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.