Piezoelectric loudspeaker
US9525947B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2014 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | Jan 10, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a piezoelectric loudspeaker. The piezoelectric loudspeaker comprises a sound producing plate, a resonant sound-box, a surround and a reflective sound-box. The sound producing plate comprises a piezoelectric ceramic element. The resonant sound-box includes a first opening comprising a first carrying part. The sound producing plate is disposed on the first carrying part. A cavity resonator is formed between the sound producing plate and the resonant sound-box. The surround is disposed between the first carrying part and the sound producing plate. The reflective sound-box includes a second opening and a reflective output opening. The second opening comprises a second carrying part. The resonant sound-box is disposed on the second carrying part. A reflective cavity body is formed between the resonant sound-box and the reflective sound-box, and the reflective cavity body is connected the reflective output opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.