Invention Grant
US08406452B2 Diaphragm for speaker, speaker using the diaphragm, and system using the speaker
有权
扬声器隔膜，扬声器使用隔膜，系统使用扬声器
- Patent Title: Diaphragm for speaker, speaker using the diaphragm, and system using the speaker
- Patent Title (中): 扬声器隔膜，扬声器使用隔膜，系统使用扬声器
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Application No.: US12602017Application Date: 2008-07-08
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Publication No.: US08406452B2Publication Date: 2013-03-26
- Inventor: Yoshimichi Kajihara , Kazuaki Nishimura , Hiroshi Shinkoda
- Applicant: Yoshimichi Kajihara , Kazuaki Nishimura , Hiroshi Shinkoda
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: RatnerPrestia
- Priority: JP2007-183964 20070713; JP2007-183965 20070713; JP2007-259594 20071003; JP2007-259595 20071003
- International Application: PCT/JP2008/001817 WO 20080708
- International Announcement: WO2009/011102 WO 20090122
- Main IPC: H04R11/02
- IPC: H04R11/02
Abstract:
A loudspeaker diaphragm contains polylactic acid, and bamboo charcoal mixed in the polylactic acid. The diaphragm does not affect environment and provides a loudspeaker with high sound quality.
Public/Granted literature
- US20100172533A1 DIAPHRAGM FOR SPEAKER, SPEAKER USING THE DIAPHRAGM, AND SYSTEM USING THE SPEAKER Public/Granted day:2010-07-08
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