Piezoelectric speaker
US8861755B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2013 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Aug 5, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/227
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A piezoelectric speaker that includes a configuration in which a first piezoelectric speaker and a second piezoelectric speaker are respectively arranged adjacent primary surfaces of a plate-shaped base member. The first piezoelectric speaker and the second piezoelectric speaker have the same arrangement, and respective individual piezoelectric elements thereof are arranged so as to correspond to each other when viewed from the direction orthogonal to the primary surfaces of the base member. The first and second piezoelectric speakers include a piezoelectric polymer sheet and electrode patterns of substantially the same shape on both surfaces of the polymer sheet. According to this arrangement, plural individual piezoelectric elements are aligned with each other. A single type of acoustic driving signal is supplied to these plural individual piezoelectric elements in a synchronized manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.