Title:
ELECTRO-ACOUSTIC CONVERSION FILM AND DIGITAL SPEAKER
Document Type and Number:
WIPO Patent Application WO/2016/002678
Kind Code:
A1
Abstract:
An electro-acoustic conversion film that is suitably used in a digital speaker, etc., wherein the electro-acoustic conversion film has a polymer composite piezoelectric body formed by dispersing piezoelectric particles in a viscoelastic matrix comprising a polymer material having visoelasticity at normal temperature, and a thin-film electrode provided on both sides of the polymer piezoelectric body; at least one of the thin-film electrodes being divided into a plurality of regions of equal area, each region being further joined in parallel and grouped in correspondence to the weighting of each bit digit of a parallel PCM digital signal. The present invention thereby provides an electro-acoustic conversion film with which it is possible to obtain a digital speaker having minimal reverberation or crosstalk between segments.
Inventors:
MIYOSHI TETSU (JP)
Application Number:
PCT/JP2015/068585
Publication Date:
January 07, 2016
Filing Date:
June 26, 2015
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H04R3/00; H01L41/047; H01L41/09; H01L41/29; H01L41/37; H04R17/00
Foreign References:
| JPS5995796A | 1984-06-01 | |||
| JP2014014063A | 2014-01-23 | |||
| JPS60184398U | 1985-12-06 |
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (JP)
Mochitoshi Watanabe (JP)
Mochitoshi Watanabe (JP)
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