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公开(公告)号：US20210392453A1
公开(公告)日：2021-12-16
申请号：US17460571
申请日：2021-08-30
Applicant: FUJIFILM Corporation
Inventor： Naoki MURAKAMI , Tetsu MIYOSHI
IPC: H04R31/00 , H01L41/257 , G10H3/14 , H04R17/02 , H04R17/00
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.
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Patent Agency Ranking
公开(公告)号：US20180316995A1
公开(公告)日：2018-11-01
申请号：US16026392
申请日：2018-07-03
Applicant: FUJIFILM Corporation
Inventor： Tetsu MIYOSHI
CPC classification number: H04R1/025 , A47G9/1045 , A47G2009/006 , G10K9/122 , G10K9/22 , G10K11/178 , G10K2210/108 , G10K2210/3212 , G10K2210/3221 , H01L41/183 , H04R1/02 , H04R1/2869 , H04R5/023 , H04R7/04 , H04R17/00 , H04R17/005 , H04R17/10 , H04R31/00
Abstract: Provided is an electroacoustic transducer capable of reducing the thickness and weight of the entire pillow when a speaker is embedded in the pillow or a headrest, enabling miniaturization of a device by causing the position of the speaker to be close to a position at which the head is placed, and improving the accuracy of signal processing by reducing a load of the signal processing in a case where active noise control is performed, thereby improving a noise reduction effect. The electroacoustic transducer includes: an electroacoustic transduction unit having 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, and an elastic support disposed in close contact with one principal surface to bend the shape of the electroacoustic transduction film; and a first cushion layer that is in contact with the electroacoustic transduction film on an electroacoustic transduction film side of the electroacoustic transduction unit to cover the electroacoustic transduction unit and is formed of a three-dimensional solid knitted fabric.
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公开(公告)号：US20180229271A1
公开(公告)日：2018-08-16
申请号：US15948019
申请日：2018-04-09
Applicant: FUJIFILM Corporation
Inventor： Daisuke INOUE , Tetsu MIYOSHI , Shin OZAWA
CPC classification number: H04R5/02 , B06B1/0629 , B06B1/0662 , H04R7/06 , H04R17/00 , H04R17/005 , H04R2499/15 , H04S2400/11
Abstract: Provided is a video audio system including electroacoustic conversion units which include an electroacoustic conversion film having a macromolecular composite piezoelectric body formed by dispersing piezoelectric body particles in a viscoelastic matrix formed of a macromolecular material that is viscoelastic at normal temperature and thin film electrodes respectively laminated on both surfaces of the macromolecular composite piezoelectric body, curve and support the electroacoustic conversion film, and use at least a part of the electroacoustic conversion film as vibration regions and a display device which is a screen or a video display device to which videos are projected, in which at least one of the electroacoustic conversion units is disposed on a rear surface opposite to a surface of the display device on which videos are displayed, the plurality of vibration regions is arranged on the entire rear surface of the display device, and location information of the vibration regions is included in sound data that are input to the electroacoustic conversion units.
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34.发明申请公开(公告)号：US20170331030A1
公开(公告)日：2017-11-16
申请号：US15663058
申请日：2017-07-28
Applicant: FUJIFILM Corporation
Inventor： Daisuke INOUE , Tetsu MIYOSHI
CPC classification number: H01L41/183 , H01L41/047 , H01L41/193 , H01L41/257 , H01L41/37 , H04R7/04 , H04R17/005 , H04R17/025 , H04R31/003 , H04R2217/01 , H04R2307/025 , H04R2499/11
Abstract: Provided are an electroacoustic transduction film in which conversion between a vibration and a voltage is able to be appropriately performed without the occurrence of dielectric breakdown of the air between upper and lower thin film electrodes even when a high voltage is applied therebetween, a user is able to be prevented from coming into contact with a piezoelectric layer, and high productivity is achieved, and a manufacturing method of an electroacoustic transduction film. A piezoelectric layer which stretches and contracts in response to a state of an electric field, an upper thin film electrode formed on one principal surface of the piezoelectric layer, a lower thin film electrode formed on the other principal surface of the piezoelectric layer, an upper protective layer formed on the upper thin film electrode, and a lower protective layer formed on the lower thin film electrode are included, and a groove which penetrates the thin film electrode and the protective layer is formed in at least a portion of an outer peripheral portion in a surface direction of at least one of the upper thin film electrode and the upper protective layer, or the lower thin film electrode and the lower protective layer.
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公开(公告)号：US20170111746A1
公开(公告)日：2017-04-20
申请号：US15394387
申请日：2016-12-29
Applicant: FUJIFILM Corporation
Inventor： Tetsu MIYOSHI
CPC classification number: H04R17/005 , H01L41/047 , H01L41/09 , H01L41/183 , H01L41/257 , H01L41/37 , H04R1/005 , H04R7/06 , H04R2307/025
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, and at least one of the thin-film electrodes is divided into a plurality of regions of which an area increases by 2n times (n is a natural number including 0). Thus, a digital speaker in which reverberation or crosstalk between segments is suppressed is obtained.
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公开(公告)号：US20160014527A1
公开(公告)日：2016-01-14
申请号：US14858734
申请日：2015-09-18
Applicant: FUJIFILM Corporation
Inventor： Tetsu MIYOSHI , Yusuke HATANAKA , Akito FUKUNAGA
IPC: H04R17/00
CPC classification number: H04R17/005 , B06B1/0662 , B06B1/0688 , G10K11/004 , H01L41/183 , H04R17/025 , H04R2400/00 , H04R2499/11
Abstract: Provided is an electroacoustic converter film including thin film electrodes provided on both surfaces 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 protective layers formed on the thin film electrodes. The electroacoustic converter film further includes electrode lead-out metal foils laminated on the thin film electrodes, and the electrode lead-out metal foils allows connection to wiring through soldering when electrodes are led out from the thin film electrodes.
Abstract translation: 提供了一种电声转换膜，其包括设置在聚合物复合压电体的两面的薄膜电极，其中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体中，以及形成在薄膜上的保护层 胶片电极。 电声转换膜还包括层压在薄膜电极上的电极引出金属箔，并且当电极从薄膜电极引出时，电极引出金属箔通过焊接连接到布线。
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