Invention Grant
- Patent Title: Electroacoustic transduction film
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Application No.: US14862380Application Date: 2015-09-23
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Publication No.: US09621997B2Publication Date: 2017-04-11
- Inventor: Tetsu Miyoshi , Yusuke Hatanaka
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2013-075961 20130401
- Main IPC: H04R17/00
- IPC: H04R17/00 ; H01L41/37 ; H01L41/257 ; H01L41/18 ; H04R31/00 ; H04R7/04

Abstract:
Disclosed is an electroacoustic transduction film suitable for a flexible speaker or the like, in which predetermined acoustic properties are able to be stably exhibited regardless of a bending state. The electroacoustic transduction film includes a polymer composite piezoelectric body in which piezoelectric body particles are dispersed in a viscoelastic matrix formed of a polymer material having viscoelasticity at a normal temperature, and electrode layers interposing the polymer composite piezoelectric body therebetween, and an area fraction of the piezoelectric body particles in a contact surface with respect to the electrode layer is less than or equal to 50%, and thus the object is attained.
Public/Granted literature
- US20160014526A1 ELECTROACOUSTIC TRANSDUCTION FILM Public/Granted day:2016-01-14
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