Invention Grant
- Patent Title: Electroacoustic converter film, flexible display, vocal cord microphone, and musical instrument sensor
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Application No.: US14229606Application Date: 2014-03-28
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Publication No.: US09761784B2Publication Date: 2017-09-12
- Inventor: Tetsu Miyoshi
- 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: JP2011-218499 20110930; JP2012-129965 20120607
- Main IPC: H01L41/04
- IPC: H01L41/04 ; H01L41/18 ; H01L41/08 ; H04R7/04 ; H04R17/00 ; G10H3/14 ; H04R31/00 ; H04R1/46 ; G02F1/1333

Abstract:
Provided is an electroacoustic converter film including: a polymeric composite piezoelectric body having piezoelectric particles dispersed in a viscoelastic matrix which is formed of a polymer material exhibiting viscoelasticity at ordinary temperatures; thin film electrodes formed on both sides of the polymeric composite piezoelectric body; and protective layers formed on surfaces of the thin film electrodes. The electroacoustic converter film serves as a speaker capable of being integrated with a flexible display without impairing lightweightness or flexibility, and has considerable frequency dispersion in the storage modulus and also has a local maximum of the loss tangent around ordinary temperatures. A flexible display, a vocal cord microphone and a musical instrument sensor, in each of which the electroacoustic converter film is used, are also provided.
Public/Granted literature
- US20140210309A1 ELECTROACOUSTIC CONVERTER FILM, FLEXIBLE DISPLAY, VOCAL CORD MICROPHONE, AND MUSICAL INSTRUMENT SENSOR Public/Granted day:2014-07-31
Information query
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