公开(公告)号：US20190157543A1

公开(公告)日：2019-05-23

申请号：US16254192

申请日：2019-01-22

Applicant: FUJIFILM Corporation

Inventor： Akihito FUKUNAGA ,  Tetsu MIYOSHI

IPC: H01L41/312 ,  H01L41/047 ,  H01L41/18 ,  H01L41/113 ,  H01L41/09 ,  B32B37/12 ,  B32B37/14 ,  B32B38/00 ,  B32B27/30 ,  H01L41/37 ,  H01L41/053 ,  H01L41/331 ,  H01L41/257 ,  H04R31/00 ,  H04R17/00 ,  H01L41/338 ,  H01L41/317 ,  H01L41/29

Abstract: Provided are an electroacoustic conversion film web, an electroacoustic conversion film, and a method of manufacturing an electroacoustic conversion film web in which costs can be reduced by reducing the number of operations without damage to thin film electrodes, the points of electrode lead-out portions can be freely determined, and thus high productivity can be achieved. A preparation step of preparing an electrode laminated body in which a single thin film electrode and a single protective layer are laminated and a lamination step of laminating the electrode laminated body and an piezoelectric layer are included. A non-adhered portion that is not adhered to the piezoelectric layer is provided in at least one end portion of the thin film electrode in a case where the electrode laminated body and the piezoelectric layer are laminated in the lamination step.

公开(公告)号：US20180160248A1

公开(公告)日：2018-06-07

申请号：US15868146

申请日：2018-01-11

Applicant: FUJIFILM Corporation

Inventor： Naoki MURAKAMI ,  Tetsu MIYOSHI

IPC: H04R31/00 ,  H04R1/46 ,  H04R17/02 ,  H04R17/00 ,  H04R7/10 ,  H01L41/18 ,  H01L41/257

CPC classification number: H04R31/003 ,  G10H3/14 ,  G10H3/143 ,  G10H2220/535 ,  G10H2220/541 ,  G10H2220/551 ,  G10H2220/555 ,  H01L41/183 ,  H01L41/257 ,  H04R1/46 ,  H04R7/10 ,  H04R17/005 ,  H04R17/02 ,  H04R2307/023 ,  H04R2307/025 ,  H04R2499/15

Abstract: Provided are an electroacoustic transduction film capable of reproducing a sound with a sufficient sound volume at a high conversion efficiency, a manufacturing method thereof, an electroacoustic transducer, a flexible display, a vocal cord microphone, and a sensor for a musical instrument. The electroacoustic transduction film includes: a polymer composite piezoelectric body in which piezoelectric body particles are dispersed in a viscoelastic matrix formed of a polymer material having viscoelasticity at a normal temperature; two thin film electrodes laminated on both surfaces of the polymer composite piezoelectric body; and two protective layers respectively laminated on the two thin film electrodes, in which an intensity ratio α1=(002) plane peak intensity/((002) plane peak intensity+(200) plane peak intensity) between a (002) plane peak intensity and a (200) plane peak intensity derived from the piezoelectric body particles in a case where the polymer composite piezoelectric body is evaluated by an X-ray diffraction method is more than or equal to 0.6 and less than 1.

公开(公告)号：US20170366902A1

公开(公告)日：2017-12-21

申请号：US15670688

申请日：2017-08-07

Applicant: FUJIFILM Corporation

Inventor： Tetsu MIYOSHI

IPC: H04R17/00 ,  H04R7/12 ,  H04R7/16 ,  H04R31/00

CPC classification number: H04R17/00 ,  H04R1/02 ,  H04R1/40 ,  H04R7/12 ,  H04R7/122 ,  H04R7/16 ,  H04R17/005 ,  H04R31/003 ,  H04R2307/025

Abstract: Provided are an electroacoustic transducer capable of stably reproducing a sound with high acoustic quality and widening a frequency band that is able to be reproduced, and an electroacoustic transduction system. In the electroacoustic transducer including: an electroacoustic transduction film including a polymer composite piezoelectric body in which piezoelectric body particles are dispersed in a viscoelastic matrix formed of a polymer material having viscoelasticity at a normal temperature, and two thin film electrodes laminated on both surfaces of the polymer composite piezoelectric body; and an elastic supporter which is disposed to be closely attached to one principal surface of the electroacoustic transduction film so as to cause the electroacoustic transduction film to be bent, a bent portion of the electroacoustic transduction film has a quadrangular shape, a length of a short side of the bent portion is less than or equal to 10 cm, and a length of a long side thereof is greater than or equal to 30 cm.

公开(公告)号：US20160021465A1

公开(公告)日：2016-01-21

申请号：US14867128

申请日：2015-09-28

Applicant: FUJIFILM CORPORATION

Inventor： Tetsu MIYOSHI

IPC: H04R17/00 ,  H04R3/04

CPC classification number: H04R17/005 ,  H04R3/04 ,  H04R31/00 ,  H04R2307/025

Abstract: The present invention provides a speaker system comprising: an electroacoustic converter film composed of a polymeric composite piezoelectric body in which piezoelectric body particles are dispersed in a viscoelastic matrix formed of a polymer material that exhibits viscoelasticity at normal temperature, and thin film electrodes formed on both surfaces of the polymeric composite piezoelectric body; and a driving circuit that attenuates signal intensity of an input signal from a signal source at a rate of 5 dB to 7 dB per octave and supplies the attenuated input signal to the electroacoustic converter film.

Abstract translation: 本发明提供一种扬声器系统，包括：电声转换膜，其由压电体颗粒分散在由在常温下显示粘弹性的聚合物材料形成的粘弹性基质中的聚合物复合压电体和在两者上形成的薄膜电极组成 聚合物复合压电体的表面; 以及驱动电路，其以5dB至7dB每倍频程的速率衰减来自信号源的输入信号的信号强度，并将衰减的输入信号提供给电声转换器膜。

公开(公告)号：US20160020380A1

公开(公告)日：2016-01-21

申请号：US14867784

申请日：2015-09-28

Applicant: FUJIFILM Corporation

Inventor： Tetsu MIYOSHI

IPC: H01L41/18

CPC classification number: H01L41/183 ,  C08K3/24 ,  C08K2201/00 ,  C08L101/00 ,  H01L41/37 ,  H04R17/00

Abstract: A piezoelectric polymer composite material includes piezoelectric particles dispersed in a matrix made from a polymer material. The piezoelectric particles is composed primarily of lead zirconate titanate having a general formula of Pb(ZrxTi1-x)O3 and each of the piezoelectric particles contains a mixture of tetragonal crystals and rhombohedral crystals.

Abstract translation: 压电聚合物复合材料包括分散在由聚合物材料制成的基体中的压电颗粒。 压电体颗粒主要由具有通式Pb（Zr x Ti 1-x）O 3的锆钛酸铅组成，并且每个压电颗粒含有四方晶体和菱面体晶体的混合物。

公开(公告)号：US20250097629A1

公开(公告)日：2025-03-20

申请号：US18967164

申请日：2024-12-03

Applicant: FUJIFILM Corporation

Inventor： Tetsu MIYOSHI

IPC: H04R1/24 ,  H04R7/04 ,  H04R17/00

Abstract: Provided is an electroacoustic transducer in which a decrease in sound pressure in a high sound band is suppressed and power consumption can be reduced, in an electroacoustic transducer in which a plurality of vibrators are arranged on a vibration plate. The electroacoustic transducer includes a vibration plate and a vibrator group consisting of a plurality of piezoelectric vibrators arranged on one surface of the vibration plate, in which the plurality of piezoelectric vibrators each belong to any one of a first group to an n-th group, an upper limit frequency of a frequency band of an input signal input to the piezoelectric vibrator is different for each group, and in a case where upper limit frequencies for each group are denoted by f1 to fn, the upper limit frequencies gradually decrease from the upper limit frequency f1 in the first group to the upper limit frequency fn in the n-th group.

公开(公告)号：US20220142602A1

公开(公告)日：2022-05-12

申请号：US17579616

申请日：2022-01-20

Applicant: FUJIFILM CORPORATION

Inventor： Tsutomu SASAKI ,  Tetsu MIYOSHI

IPC: A61B7/04 ,  B06B1/06 ,  H01L41/053 ,  H01L41/18 ,  A61B5/00 ,  A61B5/28 ,  A61B5/33 ,  H04R1/46 ,  H04R17/02 ,  H04R17/00

Abstract: Provided is a stethoscope including: a support base that has an opening portion; a piezoelectric film that is supported by the support base in a state in which a surface exposed from the opening portion is convexly curved, and that detects a vibration caused by a sound which is generated from an object to be measured; and a protective layer that is disposed on a surface of the piezoelectric film on a side which comes into contact with the object to be measured, and that has an acoustic impedance between an acoustic impedance of the object to be measured and an acoustic impedance of the piezoelectric film.

公开(公告)号：US20210400395A1

公开(公告)日：2021-12-23

申请号：US17466855

申请日：2021-09-03

Applicant: FUJIFILM Corporation

Inventor： Tetsu MIYOSHI

IPC: H04R17/00 ,  H01L41/18

Abstract: An object is to provide an electroacoustic transducer consisting of a vibration plate and an exciter and having good flexibility. The object is solved by providing a vibration plate and an exciter, in which a maximal value of a loss tangent of the exciter at a frequency of 1 Hz according to dynamic viscoelasticity measurement is 0.08 or more in a temperature range of 0° C. to 50° C., and a product of a thickness of the exciter and a storage elastic modulus at a frequency of 1 Hz and 25° C. according to the dynamic viscoelasticity measurement is at most three times a product of a thickness of the vibration plate and a Young's modulus.

公开(公告)号：US20190141433A1

公开(公告)日：2019-05-09

申请号：US16231755

申请日：2018-12-24

Applicant: FUJIFILM Corporation

Inventor： Tetsu MIYOSHI ,  Jun SATO

IPC: H04R1/14 ,  H01L41/193 ,  H04R17/02 ,  H01L41/113 ,  H01L41/08 ,  G10H3/14

Abstract: Provided are a pickup sensor and a biological sensor that are small-sized and can detect micro vibration efficiently and stably with high accuracy. The pickup sensor includes an electroacoustic converter film including: a piezoelectric polymer composite in which piezoelectric particles are dispersed in a viscoelastic matrix that is formed of a polymer material having viscoelasticity at normal temperature; two thin film electrodes that are laminated on opposite surfaces of the piezoelectric polymer composite, respectively; and a protective layer that is laminated on at least one of the two thin film electrodes, in which at least a part of a surface of the electroacoustic converter film is an abutting surface that abuts against a test object, and the thin film electrode on a surface opposite to the abutting surface is grounded.

公开(公告)号：US20170019737A1

公开(公告)日：2017-01-19

申请号：US15279949

申请日：2016-09-29

Applicant: FUJIFILM Corporation

Inventor： Tetsu MIYOSHI

IPC: H04R17/00

CPC classification number: H04R17/005 ,  H04R7/12 ,  H04R7/18 ,  H04R31/00 ,  H04R2400/11

Abstract: An electroacoustic converter includes a piezoelectric film whose principal surface expands and contracts according to an electric field, a viscoelastic support which is in close contact with the principal surface of the piezoelectric film, a pressing member which presses the piezoelectric film to the viscoelastic support, and an expandable pressing sheet which is tensioned and in close contact with the surface of the piezoelectric film opposite to the viscoelastic support to press the piezoelectric film and the viscoelastic support. In a section in a predetermined direction perpendicular to the principal surface of the piezoelectric film, the piezoelectric film has a flat portion which is held by the pressing sheet and the viscoelastic support in a portion thereof excluding a pressed portion by the pressing member, and an inclined portion which is connected to the pressed portion and the flat portion and extends in a direction of intersecting the pressed portion. With this, an electroacoustic converter having excellent acoustic characteristics and stab resistance is provided.

Abstract translation: 一种电声转换器包括：其主表面根据电场膨胀和收缩的压电膜，与压电膜的主表面紧密接触的粘弹性载体，将压电膜压到粘弹性载体上的按压构件，以及 一个可膨胀的压片，其张紧并与压电膜的与粘弹性载体相对的表面紧密接触，以压制压电膜和粘弹性载体。 在垂直于压电膜的主表面的预定方向的截面中，压电膜具有平坦部分，该平坦部分由按压片材和粘弹性支撑件保持在除了按压部件的按压部分之外的部分中， 倾斜部分，其连接到按压部分和平坦部分，并且沿与被按压部分交叉的方向延伸。 因此，提供了具有优异的声学特性和抗刺蚀性的电声转换器。