Loudspeaker diaphragm, and loudspeaker, electronic device and mobile device including the diaphragm
US9781515B2 · kind B2 · utility
0Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2015 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Aug 21, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/796
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker diaphragm includes a base layer and a coating layer. The base layer contains natural fibers. The coating layer is composed of bamboo cellulose nanofibers and is formed at least on the first side of the base layer. The coating layer has a thickness in the range of 3% to 15%, both inclusive of the sum of the thicknesses of the base layer and the coating layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.