Diaphragm, loudspeaker using same, and electronic device and mobile device using loudspeaker
US9716950B2 · kind B2 · utility
0Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2014 |
| Grant date | Jul 25, 2017 |
| Priority date | — |
| Expiry date | Oct 6, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The diaphragm has a paper base layer and a papermaking layer. The papermaking layer is formed on a surface of the paper base layer. The paper base layer contains natural fibers and thermoplastic resin, and is formed by a papermaking process with a mixture of the natural fibers and the resin. The papermaking layer, contains fibers each having a tensile elastic modulus of 150 GPa or greater, and is formed by a papermaking process with the fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.