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公开(公告)号：US10165371B2
公开(公告)日：2018-12-25
申请号：US15513136
申请日：2015-09-30
摘要： In an embodiment, an electronic device 1 has a panel 20, a housing 10 that holds the panel 20, and a piezoelectric element 30 installed on the rear side of the panel 20, wherein the piezoelectric element 30 is installed at a position that allows for the vibration amplitude of the panel 20 to become the highest on the side closer to the center of the panel 20 in the longitudinal direction from the installed position of the piezoelectric element 30. The electronic device is capable of causing an entire panel to vibrate in a stable manner.
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公开(公告)号：US09686615B2
公开(公告)日：2017-06-20
申请号：US14843476
申请日：2015-09-02
发明人： Yutaka Doshida , Yukihiro Matsui , Hiroshi Hamada
CPC分类号： H04R17/00 , H04R1/1075 , H04R1/2811
摘要： In an embodiment, an electroacoustic converter (earphone 100) has an enclosure 41, piezoelectric sounding body 32, electromagnetic sounding body 31, and passage 35. The piezoelectric sounding body 32 includes a first vibration plate 321 having a periphery supported directly or indirectly on the enclosure 41, and a piezoelectric element 322 placed at least on one side of the vibration plate 321. The piezoelectric sounding body 32 has a second vibration plate and divides the interior of the enclosure 41 into a first space S1 and a second space S2. The electromagnetic sounding body 31 is placed in the first space S1. The passage 35 is provided in or around the piezoelectric sounding body 32 to connect the first space S1 and second space S2. The electroacoustic converter is capable of obtaining desired frequency characteristics easily.
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公开(公告)号：US11571712B2
公开(公告)日：2023-02-07
申请号：US17007355
申请日：2020-08-31
发明人： Shigeo Ishii , Fumihisa Ito , Yukihiro Matsui , Hiroshi Hamada
IPC分类号： B06B1/06 , G08B6/00 , H01L41/047 , H01L41/053 , H01L41/09 , H01L41/187 , H04R17/00 , H01L41/083
摘要： Provided is a vibration panel including an inner member, a first outer member, a second outer member, a piezoelectric actuator, an actuator bonding layer, and a filler. The inner member includes first and second main surfaces. The first outer member includes third and fourth main surfaces, the third main surface including a first region and a second region. The second outer member includes fifth and sixth main surfaces, the fifth main surface including a third region and a fourth region. The piezoelectric actuator causes vibration. The actuator bonding layer is disposed between the piezoelectric actuator and the second region and bonds the piezoelectric actuator to the second region. The filler fills a space between the second region and the fourth region and covers the piezoelectric actuator.
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公开(公告)号：US11557712B2
公开(公告)日：2023-01-17
申请号：US16277783
申请日：2019-02-15
发明人： Hiroshi Hamada , Yukihiro Matsui , Fumihisa Ito , Takashi Tomita
IPC分类号： H01L41/09 , H01L41/27 , H01L41/047
摘要： A vibration generating device 10 includes: a diaphragm 11; and a first piezoelectric actuator 12 and a second piezoelectric actuator 13 attached on an upper surface 11a and a lower surface 11b of the diaphragm 11, respectively, so as to sandwich the diaphragm 11 therebetween in a vicinity of an end surface of the diaphragm 11, wherein, in a top view of the upper surface 11a of the diaphragm 11, the first piezoelectric actuator 12 is disposed at a position shifted with respect to the second piezoelectric actuator 13.
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公开(公告)号：US11478821B2
公开(公告)日：2022-10-25
申请号：US16276488
申请日：2019-02-14
发明人： Hiroshi Hamada , Yukihiro Matsui , Fumihisa Ito , Takashi Tomita
摘要： A vibration generating device 90 includes: a housing 30 in a rectangular shape as viewed in a first direction, the housing 30 comprising: a first support portion 31 extending along a first side in a second direction perpendicular to the first direction and; a second support portion 32 extending along a second side opposite to the first side in the second direction; a panel 60 supported by the first support portion and the second support portion; and a piezoelectric element 11 attached to the panel in such a manner as to be shifted in the second direction toward the first side with respect to a central portion of the panel, wherein a width in the second direction of a portion of the panel supported by the first support portion is larger than a width in the second direction of a portion of the panel supported by the second support portion.
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6.发明授权公开(公告)号：US11430940B2
公开(公告)日：2022-08-30
申请号：US16034236
申请日：2018-07-12
发明人： Sumiaki Kishimoto , Hiroshi Hamada , Hiroyuki Shimizu , Yukihiro Matsui , Tomohiro Harada , Yukihiro Konishi
IPC分类号： H01L41/187 , H01L41/293 , H04R17/00 , H01L41/083 , H01L41/09 , H01L41/27 , H01L41/053 , H04R7/04 , H01L41/273
摘要： A multilayer piezoelectric element includes a ceramic base body, a pair of external electrodes, multiple internal electrodes, and surface electrodes. The pair of external electrodes cover a pair of end faces and extend from the pair of end faces along a pair of principal faces and a pair of side faces. The multiple internal electrodes are stacked inside the ceramic base body along the thickness direction, and are connected alternately to one or the other of the pair of external electrodes along the thickness direction. The surface electrodes extend from the pair of external electrodes along the pair of principal faces, and are each divided in the longitudinal direction at a position near, of the pair of external electrodes, the external electrode to which the internal electrode adjacent to the principal face is connected.
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公开(公告)号：US10897674B2
公开(公告)日：2021-01-19
申请号：US15902889
申请日：2018-02-22
发明人： Shigeo Ishii , Hiroshi Hamada , Yutaka Doshida , Takashi Tomita
IPC分类号： H04R17/00 , H04R7/04 , H04R9/06 , H04R23/02 , H04R1/24 , H04R7/18 , H04R1/10 , H04R5/033 , H04R7/14
摘要： An electroacoustic transducer includes a piezoelectric speaker and a housing. The piezoelectric speaker has: a first vibration plate with a periphery; a piezoelectric element placed on at least one face of the first vibration plate; and multiple openings that are provided around the piezoelectric element and penetrate through the first vibration plate in its thickness direction that is a first axis direction. The housing has: a supporting part that directly or indirectly supports the periphery; and a sound introduction port that faces the piezoelectric speaker in the first axis direction. The sound introduction port is provided at a position where it does not overlap, in the first axis direction, a first opening having the largest open area among the multiple openings. The electroacoustic transducer can improve the acoustic characteristics of a piezoelectric speaker.
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公开(公告)号：US09973857B2
公开(公告)日：2018-05-15
申请号：US14970461
申请日：2015-12-15
发明人： Yasukazu Tokuhisa , Takashi Tomita , Hiroshi Hamada , Shigeo Ishii , Yutaka Doshida , Yoshiyuki Watanabe
CPC分类号： H04R17/005 , H04R1/06
摘要： A piezoelectric speaker has a piezoelectric element and vibration plate. The piezoelectric element has a base body with a mounting surface, as well as first and second terminals that are formed on the mounting surface with a distance between them. The vibration plate has a conductive body joined to the piezoelectric element and having a principle surface facing the mounting surface, as well as a first hole with or without a bottom which is formed on the principle surface in a region facing the first terminal to form a space between the body and first terminal. The piezoelectric speaker is capable of preventing the external electrodes of the piezoelectric element from shorting to each other.
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公开(公告)号：US09756427B2
公开(公告)日：2017-09-05
申请号：US14843460
申请日：2015-09-02
发明人： Yutaka Doshida , Yukihiro Matsui , Hiroshi Hamada
CPC分类号： H04R17/00 , H04R1/1075 , H04R1/24 , H04R2217/01
摘要： In an embodiment, an electroacoustic converter (earphone 100) has an enclosure 41, piezoelectric sounding body 32, electromagnetic sounding body 31, and passage 35. The piezoelectric sounding body 32 includes a vibration plate 321 having a periphery supported directly or indirectly on the enclosure 41, and a piezoelectric element 322 placed at least on one side of the vibration plate 321. The piezoelectric sounding body 32 divides the interior of the enclosure 41 into a first space S1 and a second space S2. The electromagnetic sounding body 31 is placed in the first space S1. A passage 35 is provided in or around the piezoelectric sounding body 32, to connect the first space S1 and second space S2. The electroacoustic converter is capable of obtaining desired frequency characteristics easily.
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10.发明授权公开(公告)号：US11744156B2
公开(公告)日：2023-08-29
申请号：US16049348
申请日：2018-07-30
发明人： Hiroshi Hamada , Hiroyuki Shimizu , Sumiaki Kishimoto , Yukihiro Matsui , Shigeo Ishii , Tomohiro Harada , Yukihiro Konishi
IPC分类号： H01L41/083 , H01L41/047 , H01L41/09 , H01L41/273 , H01L41/293 , H01L41/257 , H01L41/313 , H10N30/50 , H10N30/063 , H10N30/073 , H10N30/20 , H10N30/87 , G06F3/01 , H10N30/045 , H10N30/053
CPC分类号： H10N30/508 , H10N30/063 , H10N30/073 , H10N30/206 , H10N30/872 , G06F3/016 , H10N30/045 , H10N30/053 , H10N30/871
摘要： A multilayer piezoelectric element includes a ceramic body formed by a piezoelectric ceramic, and having first and second end face facing a longitudinal direction, first and second principal faces facing a thickness direction perpendicular to the longitudinal direction. A pair of external electrodes cover the first and second end faces, extend from the first and second end faces onto the first principal face via ridge parts connecting the end faces with the principal faces, and project in the thickness direction on the first principal face. Multiple internal electrodes are stacked inside the ceramic body and are connected alternately to the pair of external electrodes along the thickness direction. A surface electrode is provided on at least one of the first and second principal faces, and connected to the external electrode different from the one to which the internal electrode adjacent in the thickness direction is connected.
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