Piezoelectric speaker
US12015896B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2022 |
| Grant date | Jun 18, 2024 |
| Priority date | — |
| Expiry date | Feb 9, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R7/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention discloses a piezoelectric speaker, including a substrate with a cavity therethrough a supporting structure covering the cavity a first drive structure stacked on the supporting structure, including alternately stacked first electrode layers and first piezoelectric layers a transmission structure stacked on the first drive structure, and a separation slot penetrating the supporting structure and the first drive structure to separate the first drive structure into a first piezoelectric driving part and a second piezoelectric driving part. A rigidity of the transmission structure is less than or equal to a rigidity of the first drive structure, and the rigidity of the first drive structure is less than or equal to a rigidity of the supporting structure. Compared with the prior art, the sound pressure level generated at the same moment is higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.