Speaker structure
US8107651B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2008 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Oct 16, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R19/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A speaker structure including a single electret vibrating film structure, a single metal electrode with a plurality of holes and a frame supporting member is provided. In an example, the electret vibrating film structure is formed by an electret film layer, an ultra-thin metal thin film electrode and an isolation layer stacked together, in which the ultra-thin metal thin film electrode is located between the electret film layer and the isolation layer. In another example, the electret vibrating film structure is formed by the electret film layer and a conductive electrode layer having oxide conductive materials. The frame supporting member is located between the electret vibrating film structure and the metal electrode for forming a space for the vibration of the electret vibrating film structure, so as to generate sounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.