Title:
PICKUP SENSOR AND BIOMETRIC SENSOR
Document Type and Number:
WIPO Patent Application WO/2018/020887
Kind Code:
A1
Abstract:
Provided are a pickup sensor and a biometric sensor which are compact and are capable of detecting minute vibrations stably, efficiently and with high precision. This pickup sensor is provided with an electro-acoustic converting film comprising a polymer composite piezoelectric body formed by dispersing piezoelectric particles in a viscoelastic matrix comprising a polymer material that is viscoelastic at room temperature, two thin-film electrodes laminated onto the two surfaces of the polymer composite piezoelectric body, and a protective layer laminated onto at least one of the two thin-film electrodes, wherein at least part of a surface of the electro-acoustic converting film is a contacting surface which comes into contact with a subject, and the thin-film electrode on the surface on the opposite side to the contacting surface is grounded.
Inventors:
MIYOSHI TETSU (JP)
SATO JUN (JP)
SATO JUN (JP)
Application Number:
PCT/JP2017/021962
Publication Date:
February 01, 2018
Filing Date:
June 14, 2017
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H04R17/02; H04R1/14; H04R1/46
Foreign References:
| JP2014014063A | 2014-01-23 | |||
| JPS5257493U | 1977-04-26 | |||
| JPS5574198U | 1980-05-22 |
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (JP)
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