公开(公告)号：US11793083B2

公开(公告)日：2023-10-17

申请号：US16628765

申请日：2018-07-05

Applicant: DAIKIN INDUSTRIES, LTD. ,  OSAKA UNIVERSITY

Inventor： Shinya Bitou ,  Tetsuhiro Kodani ,  Saori Sakami ,  Takashi Kanemura ,  Tsuyoshi Sekitani ,  Takafumi Uemura ,  Shusuke Yoshimoto

IPC: H01L41/193 ,  G01P15/09 ,  G01H11/08 ,  H01L41/113 ,  H10N30/857 ,  H10N30/30

CPC classification number: H10N30/857 ,  G01H11/08 ,  G01P15/0922 ,  H10N30/302

Abstract: An object of the present invention is to provide a vibration sensor in which the frequency dependence of the output is small. The present invention provides a vibration sensor 1 comprising: a support 2; an organic piezoelectric material 3 deformably disposed in or on the support 2; and an electrode 4 for extracting an electrical signal generated by deformation of the organic piezoelectric material 3, the electrode 4 being formed on the organic piezoelectric material 3, the organic piezoelectric material 3 comprising a copolymer of vinylidene fluoride and one or more monomers copolymerizable with vinylidene fluoride.

公开(公告)号：US11424402B2

公开(公告)日：2022-08-23

申请号：US16088664

申请日：2017-03-28

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Tetsuhiro Kodani ,  Saori Sakami ,  Hiroyuki Sagami ,  Takaya Yamada ,  Shinya Bitou ,  Eri Mukai ,  Takashi Kanemura

IPC: H01L41/08 ,  B32B27/30 ,  G06F3/041 ,  H01L41/113

Abstract: The present invention addresses the problem of providing a bimorph-type piezoelectric film that is less susceptible to the influence of pyroelectric noise resulting from temperature changes, and that makes it possible to provide a pressure-sensitive sensor or the like. The present invention provides a bimorph-type piezoelectric film comprising a first pyroelectric film having piezoelectric anisotropy in an in-plane direction, and a second pyroelectric film having piezoelectric anisotropy in an in-plane direction, the first pyroelectric film and the second pyroelectric film being disposed in such a manner that their surfaces on which electric charges of the same polarity are generated by a temperature increase are each outward-facing.