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    PIEZOELECTRIC ELEMENT AND ELECTROACOUSTIC TRANSDUCER
    1.
    发明申请
    PIEZOELECTRIC ELEMENT AND ELECTROACOUSTIC TRANSDUCER 有权

    公开(公告)号：US20240407266A1

    公开(公告)日：2024-12-05

    申请号：US18799540

    申请日：2024-08-09

    Applicant: FUJIFILM Corporation

    Inventor： Tetsu Miyoshi

    IPC: H10N30/87 ,  H04R17/00 ,  H10N30/045 ,  H10N30/85 ,  H10N30/88

    Abstract: Provided are a piezoelectric element and an electroacoustic transducer, which can be made thinner while ensuring piezoelectric characteristics in a piezoelectric element. The piezoelectric element includes a common electrode layer, a first piezoelectric layer which consists of a polymer-based piezoelectric composite material containing piezoelectric particles in a matrix containing a polymer material and is provided on one surface of the common electrode layer, a first electrode layer which is provided on a surface of the first piezoelectric layer on a side opposite to the common electrode layer, a first protective layer which is provided on a surface of the first electrode layer on a side opposite to the first piezoelectric layer, a second piezoelectric layer which consists of a polymer-based piezoelectric composite material containing piezoelectric particles in a matrix containing a polymer material and is provided on the other surface of the common electrode layer, a second electrode layer which is provided on a surface of the second piezoelectric layer on a side opposite to the common electrode layer, and a second protective layer which is provided on a surface of the second electrode layer on a side opposite to the second piezoelectric layer.

    ROLLABLE ELECTROACOUSTIC TRANSDUCER AND ROLLABLE IMAGE DISPLAY DEVICE
    2.
    发明公开
    ROLLABLE ELECTROACOUSTIC TRANSDUCER AND ROLLABLE IMAGE DISPLAY DEVICE 审中-公开

    公开(公告)号：US20230232164A1

    公开(公告)日：2023-07-20

    申请号：US18189495

    申请日：2023-03-24

    Applicant: FUJIFILM Corporation

    Inventor： Tetsu Miyoshi

    IPC: H04R17/00 ,  H04R1/06

    CPC classification number: H04R17/00 ,  H04R1/06 ,  H04R2499/15

    Abstract: An object of the present invention is to provide an electroacoustic transducer and an image display device, each of which can be rolled up and does not need a mechanical mechanism and a driving source. The object is accomplished by providing a vibration plate or display element which can be rolled up, and a convex leaf spring having an arc-shaped cross section in the lateral direction and having a concave side disposed facing one surface of the vibration plate or a non-image-displaying surface of the display element.

    Electroacoustic transduction film and manufacturing method thereof, electroacoustic transducer, flexible display, vocal cord microphone, sensor for musical instrument
    3.
    发明授权
    Electroacoustic transduction film and manufacturing method thereof, electroacoustic transducer, flexible display, vocal cord microphone, sensor for musical instrument 有权

    公开(公告)号：US11140500B2

    公开(公告)日：2021-10-05

    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 ,  G10H3/14

    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.

    Electroacoustic transduction film and electroacoustic transducer
    6.
    发明授权
    Electroacoustic transduction film and electroacoustic transducer 有权

    公开(公告)号：US10091586B2

    公开(公告)日：2018-10-02

    申请号：US15841617

    申请日：2017-12-14

    Applicant: FUJIFILM Corporation

    Inventor： Shin Ozawa ,  Daisuke Inoue ,  Tetsu Miyoshi

    IPC: H01L41/09 ,  H01L41/047 ,  H01L41/18 ,  H04R17/00 ,  H01L41/053

    Abstract: Provided are an electroacoustic transduction film and an electroacoustic transducer capable of reproducing a sound with a sufficient sound volume and preventing deterioration of appearance. 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; a lower thin film electrode laminated on one principal surface of the polymer composite piezoelectric body; a lower protective layer laminated on the lower thin film electrode; an upper thin film electrode formed on the other principal surface of the polymer composite piezoelectric body; an upper protective layer laminated on the upper thin film electrode; and a colored layer laminated on at least one of a surface layer side of the upper thin film electrode and a surface layer side of the lower thin film electrode.

    Electroacoustic transducer
    10.
    发明授权
    Electroacoustic transducer 有权

    公开(公告)号：US10567884B2

    公开(公告)日：2020-02-18

    申请号：US15958150

    申请日：2018-04-20

    Applicant: FUJIFILM Corporation

    Inventor： Tetsu Miyoshi

    IPC: H01L41/053 ,  H04R17/00 ,  G10K11/178 ,  H04R3/02 ,  G10K9/125 ,  B06B1/06 ,  H01L41/193 ,  H04R17/02

    Abstract: 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 thin film electrodes respectively laminated on both surfaces of the polymer composite piezoelectric body is included, and two or more of the electroacoustic transduction films are laminated, and a gap between the adjacent electroacoustic transduction films is less than or equal to 3 cm.

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