Speaker diaphragm, speaker, and electronic equipment and mobile device using the speaker
US9008349B2 · kind B2 · utility
0Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2009 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Jun 26, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A speaker diaphragm of the present invention is formed by mixing polylactic acid as a plant-derived resin, bamboo fibers and a natural binder. It is thereby possible to realize a speaker diaphragm capable of obtaining sufficient sound velocity, while having low environmental load and high sound quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.