Piezoelectric loudspeaker
US6747395B1 · kind B1 · utility
15Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1999 |
| Grant date | Jun 8, 2004 |
| Priority date | — |
| Expiry date | Nov 1, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R17/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A piezoelectric loudspeaker includes: a piezoelectric vibrator including a diaphragm and a piezoelectric member provided on at least one face of the diaphragm, the diaphragm being vibrated by the piezoelectric member; a frame for supporting the piezoelectric vibrator; and a visco-elastic member provided on at least one face of the piezoelectric vibrator. The visco-elastic member is disposed in a substantial center of the piezoelectric vibrator. The visco-elastic member has a bottom face area which accounts for about 11% to about 80% of a bottom face area of the diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.