Title:
POLYMER PIEZOELECTRIC FILM ELEMENT, POWER STORAGE DEVICE USING SAME, AND LOAD DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/230707
Kind Code:
A1
Abstract:
Provided is a polymer piezoelectric film element which generates electricity at a high degree of sensitivity in response to vibrations across a broad frequency band, including vibrations of a comparatively low frequency no higher than 10Hz such as, for example, those caused by the motion of humans or animals or faint contact stress, and also including vibrations of a high frequency equal to or higher than 10Hz such as those caused by automobiles, trains and other transport vehicles, building construction work, and factory equipment in the manufacturing industry, is also capable of using the same as power or as a sensor, can be made into a thin film and at a high yield can be used as a stably driving power supply device, a tactile sensor, or a vitals sensor for measuring bioelectric signals such as pulse waves, heart rates and respiration waves. The present invention pertains to: a polymer piezoelectric film element characterized in that an electrode sheet is formed on both surfaces of a polymer piezoelectric film, and by having a structure which has bumps and dips or a wave-shaped structure which has peaks and valleys in an axis perpendicular to said surfaces; and a power storage device which generates electricity by receiving external stress via the piezoelectric effect and changing the same to power, a sensor for detecting said stress, or a vitals sensor for measuring bioelectric signals.
Inventors:
OKABE JUN
SUNAGA TADAHIRO
TOKITO SHIZUO
SUNAGA TADAHIRO
TOKITO SHIZUO
Application Number:
PCT/JP2022/018032
Publication Date:
November 03, 2022
Filing Date:
April 18, 2022
Export Citation:
Assignee:
MITSUI CHEMICALS INC (JP)
International Classes:
H01L41/193; H01L41/113; H01L41/257; H02N2/18
Domestic Patent References:
| WO2020261954A1 | 2020-12-30 | |||
| WO2009107305A1 | 2009-09-03 | |||
| WO2018181261A1 | 2018-10-04 | |||
| WO2012137897A1 | 2012-10-11 |
Foreign References:
| JP2011222679A | 2011-11-04 | |||
| JP2017017831A | 2017-01-19 | |||
| JP2020119995A | 2020-08-06 | |||
| JP2014111911A | 2014-06-19 | |||
| JP2021076711A | 2021-05-20 |
Other References:
H. KAWAI, JPN. J. APPL. PHYS., vol. 8, 1969, pages 975
FIELD RESPONSIVE POLYMERS, vol. 6, pages 88 - 103
KENJI UCHINO: "Ferroelectric Devices", MORIKITA PUBLISHING CO., LTD, pages: 142
FIELD RESPONSIVE POLYMERS, vol. 6, pages 88 - 103
KENJI UCHINO: "Ferroelectric Devices", MORIKITA PUBLISHING CO., LTD, pages: 142
Attorney, Agent or Firm:
WASHIDA & ASSOCIATES (JP)
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