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    IMAGE DISPLAY APPARATUS
    12.
    发明申请
    IMAGE DISPLAY APPARATUS 有权

    公开(公告)号：US20250117053A1

    公开(公告)日：2025-04-10

    申请号：US18984599

    申请日：2024-12-17

    Applicant: FUJIFILM Corporation

    Inventor： Tetsu MIYOSHI

    IPC: G06F1/16 ,  H04R1/02 ,  H04R17/00

    Abstract: An object is to provide an image display apparatus that outputs a voice by vibrating a display panel using a vibrator, in which a voice with sufficient sound pressure can be heard up to a high sound band. The object is achieved by including a display panel having a pixel pitch of 25 to 100 dpi and a vibrator mounted on a non-display surface of the display panel, in which, in a case where a length of a diagonal line of the display panel is denoted by A, a maximum length Lmax of the vibrator in a direction along a lateral direction of the display panel satisfies “Lmax≤(A/0.15)1/2”.

    LAMINATED PIEZOELECTRIC ELEMENT AND ELECTROACOUSTIC TRANSDUCER
    13.
    发明申请
    LAMINATED PIEZOELECTRIC ELEMENT AND ELECTROACOUSTIC TRANSDUCER 有权

    公开(公告)号：US20230019706A1

    公开(公告)日：2023-01-19

    申请号：US17946825

    申请日：2022-09-16

    Applicant: FUJIFILM Corporation

    Inventor： Teruo ASHIKAWA ,  Kazuo HIRAGUCHI ,  Yusuke KAGAWA ,  Tetsu MIYOSHI

    IPC: H04R17/00 ,  H01L41/047 ,  H01L41/053 ,  H01L41/083

    Abstract: Provided are a laminated piezoelectric element and an electroacoustic transducer capable of obtaining high piezoelectric characteristics and easily ensuring an electric contact to an electrode layer. A plurality of layers of piezoelectric films, each of which is formed by laminating a first protective layer, a first electrode layer, a piezoelectric layer, a second electrode layer, and a second protective layer in this order, are laminated. Each of the piezoelectric layers is polarized in a thickness direction. In each of the piezoelectric films, the first electrode is disposed on an upstream side in a polarization direction of the piezoelectric layer, and the second electrode is disposed on a downstream side. Each of the plurality of piezoelectric films has a cemented portion which is cemented to an adjacent piezoelectric film and a protruding portion which is not cemented to the adjacent piezoelectric film and in which at least the first electrode layer and the first protective layer or the second electrode layer and the second protective layer protrude from the cemented portion toward the outside in a plane direction. At the protruding portion of each of the piezoelectric films, at least one of a first contact, to which the first electrode layers of the piezoelectric films are electrically connected to each other, or a second contact, to which the second electrode layers of the piezoelectric films are electrically connected to each other, is formed.

    POLYMER-BASED PIEZOELECTRIC COMPOSITE MATERIAL AND METHOD FOR PRODUCING RAW-MATERIAL PARTICLES FOR COMPOSITE
    14.
    发明申请
    POLYMER-BASED PIEZOELECTRIC COMPOSITE MATERIAL AND METHOD FOR PRODUCING RAW-MATERIAL PARTICLES FOR COMPOSITE 有权

    公开(公告)号：US20220282062A1

    公开(公告)日：2022-09-08

    申请号：US17827161

    申请日：2022-05-27

    Applicant: FUJIFILM Corporation

    Inventor： Tetsu MIYOSHI

    IPC: C08K3/22 ,  C08K7/00

    Abstract: An object of the present invention is to provide a polymer-based piezoelectric composite material including lead zirconate titanate particles in a matrix consisting of a polymer material, the polymer-based piezoelectric composite material having a high piezoelectric characteristic; and a method for producing raw-material particles for a composite, the raw-material particles being used in the polymer-based piezoelectric composite material. The object is accomplished by a configuration in which the lead zirconate titanate particles include a polycrystalline material, a crystal structure of primary particles constituting the polycrystalline material of the lead zirconate titanate particles includes tetragonal particles, and a volume fraction occupied by the tetragonal particles is 80% or more.

    ELECTRO-ACOUSTIC CONVERSION FILM AND DIGITAL SPEAKER
    15.
    发明申请
    ELECTRO-ACOUSTIC CONVERSION FILM AND DIGITAL SPEAKER 审中-公开

    公开(公告)号：US20170111745A1

    公开(公告)日：2017-04-20

    申请号：US15394024

    申请日：2016-12-29

    Applicant: FUJIFILM Corporation

    Inventor： Tetsu MIYOSHI

    IPC: H04R17/00 ,  H01L41/047 ,  H01L41/257 ,  H01L41/29 ,  H01L41/193 ,  H04R1/00 ,  H01L41/09

    CPC classification number: H04R17/005 ,  H01L41/047 ,  H01L41/09 ,  H01L41/183 ,  H01L41/193 ,  H01L41/257 ,  H01L41/29 ,  H04R1/005

    Abstract: Provided is an electro-acoustic conversion film that is suitably used for a digital speaker or the like, and that includes a polymer composite piezoelectric body formed by dispersing piezoelectric particles in a viscoelastic matrix formed of a polymer material having viscoelasticity at room temperature, and thin-film electrodes provided on both surfaces of the polymer composite piezoelectric body, in which at least one of the thin-film electrodes is divided into a plurality of regions having the same area, and the respective regions are coupled in parallel and grouped to correspond to a weight of each bit digit of a parallel PCM digital signal. Thus, an electro-acoustic conversion film by which a digital speaker in which reverberation or crosstalk between segments is suppressed is obtained is provided.

    PIEZOELECTRIC POLYMER COMPOSITE
    16.
    发明申请
    PIEZOELECTRIC POLYMER COMPOSITE 审中-公开
    压电聚合物复合材料

    公开(公告)号：US20170018700A1

    公开(公告)日：2017-01-19

    申请号：US15277098

    申请日：2016-09-27

    Applicant: FUJIFILM Corporation

    Inventor： Tetsu MIYOSHI ,  Yosuke TAKEUCHI

    IPC: H01L41/18

    CPC classification number: H01L41/183 ,  H01L41/257 ,  H01L41/37 ,  H04R17/005

    Abstract: In a piezoelectric polymer composite in which piezoelectric particles are dispersed in a polymer matrix, the piezoelectric particles include 5 vol % to 30 vol % of particles having a particle size which is 0.25 times to 1 time a thickness of the piezoelectric polymer composite. As a result, the piezoelectric polymer composite exhibits satisfactory piezoelectric characteristics.

    Abstract translation: 在其中将压电体颗粒分散在聚合物基体中的压电聚合物复合材料中，压电颗粒包括5体积％至30体积％的粒径为压电聚合物复合材料的厚度的0.25倍至1倍的颗粒。 结果，压电聚合物复合材料表现出令人满意的压电特性。

    ELECTROACOUSTIC TRANSDUCTION FILM
    17.
    发明申请
    ELECTROACOUSTIC TRANSDUCTION FILM 有权
    电声传输膜

    公开(公告)号：US20160014526A1

    公开(公告)日：2016-01-14

    申请号：US14862380

    申请日：2015-09-23

    Applicant: FUJIFILM Corporation

    Inventor： Tetsu MIYOSHI ,  Yusuke HATANAKA

    IPC: H04R17/00

    CPC classification number: H04R17/00 ,  H01L41/183 ,  H01L41/257 ,  H01L41/37 ,  H04R7/04 ,  H04R17/005 ,  H04R31/003 ,  H04R2499/11

    Abstract: Disclosed is an electroacoustic transduction film suitable for a flexible speaker or the like, in which predetermined acoustic properties are able to be stably exhibited regardless of a bending state. 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, and electrode layers interposing the polymer composite piezoelectric body therebetween, and an area fraction of the piezoelectric body particles in a contact surface with respect to the electrode layer is less than or equal to 50%, and thus the object is attained.

    Abstract translation: 公开了适用于柔性扬声器等的电声换能膜，其中无论弯曲状态如何，能够稳定地显示预定的声学特性。 电声换能膜包括聚合物复合压电体，其中压电体颗粒分散在由常温下具有粘弹性的聚合物材料形成的粘弹性基体中，并且将聚合物复合压电体置于其间的电极层， 接触表面相对于电极层的压电体颗粒小于或等于50％，从而达到目的。

    LAMINATED PIEZOELECTRIC ELEMENT
    20.
    发明公开
    LAMINATED PIEZOELECTRIC ELEMENT 审中-公开

    公开(公告)号：US20230413674A1

    公开(公告)日：2023-12-21

    申请号：US18461900

    申请日：2023-09-06

    Applicant: FUJIFILM Corporation

    Inventor： Tetsu MIYOSHI ,  Yusuke KAGAWA

    IPC: H10N30/05 ,  H10N30/85 ,  H10N30/00 ,  H10N30/072 ,  H10N30/87

    CPC classification number: H10N30/05 ,  H10N30/85 ,  H10N30/1051 ,  H10N30/072 ,  H10N30/871

    Abstract: Provided is a laminated piezoelectric element capable of suppressing heat generation while maintaining satisfactory piezoelectric characteristics. The laminated piezoelectric element is a laminated piezoelectric element including a piezoelectric film, in which the laminated piezoelectric element is obtained by laminating a plurality of layers of piezoelectric films each including a piezoelectric layer containing a polymer-based piezoelectric composite material that contains piezoelectric particles in a matrix containing a polymer material, and electrode layers formed on both surfaces of the piezoelectric layer, and in a case where a value obtained by dividing a capacitive reactance Xc of the piezoelectric film at a frequency of 1 kHz by an equivalent series resistance ESR is set to 1, a value XE20 obtained by dividing the capacitive reactance Xc at a frequency of 20 kHz by the equivalent series resistance ESR is in a range of 0.6 to 1.5.

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