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公开(公告)号：US11711030B2
公开(公告)日：2023-07-25
申请号：US17207241
申请日：2021-03-19
摘要： A driving device generates a driving signal and outputs the driving signal to a piezoelectric element, the driving signal having a waveform obtained by using, as a first modulated wave, a first low-frequency wave having a frequency of 1 Hz or more and less than 100 Hz, using, as a second modulated wave, a waveform obtained by modulating an amplitude of a second low-frequency wave having a frequency of 100 Hz or more and 300 Hz or less with the first modulated wave, and modulating a high-frequency wave having a frequency of 20 kHz or more and 100 kHz or less with the second modulated wave.
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2.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：US09637414B2
公开(公告)日：2017-05-02
申请号：US15195979
申请日：2016-06-28
发明人： Hiroyuki Shimizu , Yutaka Doshida
IPC分类号： C04B35/475 , H01G4/12 , H01G4/008 , B32B15/00 , C04B35/626
CPC分类号： C04B35/475 , B32B15/00 , C04B35/62675 , C04B2235/3201 , C04B2235/3215 , C04B2235/3251 , C04B2235/3281 , C04B2235/3298 , C04B2235/442 , C04B2235/444 , C04B2235/604 , C04B2235/77 , H01G4/008 , H01G4/1227
摘要： A dielectric porcelain composition with a sintering density of 93% or above, is expressed by the composition formula below: 100[1−x(0.94Bi1/2Na1/2TiO3−0.06BaTiO3)−xK0.5Na0.5NbO3]+αCuO+βLiF (wherein x is between 0.14 and 0.28, and α and β meet either (I) α is between 0.4 and 1.5, and β is between 0 and 2.4, or (II) α is between 0 and 1.5, and β is between 0.2 and 2.4). The dielectric porcelain composition is Pb-free and can be sintered at low temperature, as well as a dielectric element having such composition.
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4.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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5.发明授权公开(公告)号：US11581482B2
公开(公告)日：2023-02-14
申请号：US16800894
申请日：2020-02-25
IPC分类号： H01L41/187 , H01L41/43 , H01L41/047 , C04B35/475 , C04B35/64 , C04B35/626
摘要： A piezoelectric ceramic, which does not contain lead as a constituent element, is characterized in that: its primary component is a perovskite compound expressed by the composition formula (Bi0.5−x/2Na0.5−x/2Bax)(Ti1−yMny)O3 (where 0.01≤x≤0.25, 0.001≤y≤0.020); and the coefficient of variation (CV) in grain size among the grains contained therein is 35 percent or lower. The piezoelectric ceramic presents an improved dielectric loss tangent tan δ.
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6.发明授权公开(公告)号：US11437560B2
公开(公告)日：2022-09-06
申请号：US16011286
申请日：2018-06-18
IPC分类号： H01L41/047 , B06B1/06 , H01L41/083 , G06F3/01 , H01L41/297 , H01L41/293 , H01L41/257 , H01L41/09 , H01L41/273
摘要： In an embodiment, a multilayer piezoelectric element includes a multilayer piezoelectric body and multiple internal electrodes. The multilayer piezoelectric body has a pair of principal faces in a first-axis direction, a pair of end faces in a second-axis direction crossing at right angles with the first-axis direction and defining the longitudinal direction, and a pair of side faces in a third-axis direction crossing at right angles with the first-axis direction and second-axis direction. The multiple internal electrodes are placed inside the multilayer piezoelectric body and stacked in the first-axis direction. Among the multiple internal electrodes, a center internal electrode placed at the center part of the multilayer piezoelectric body is such that its first cross-sectional shape, as viewed from the third-axis direction, has undulations greater than the undulations of the second cross-sectional shape of the center internal electrode as viewed from the second-axis direction.
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公开(公告)号：US11362261B2
公开(公告)日：2022-06-14
申请号：US16258376
申请日：2019-01-25
IPC分类号： H01L41/083 , H01L41/187 , H01L41/09 , H01L41/047 , H01L41/338 , H01L41/053
摘要： A multi-layer piezoelectric ceramic component includes: a piezoelectric ceramic body having a cuboid shape having upper and lower surfaces facing in a thickness direction, first and second end surfaces facing in a length direction, and a pair of side surfaces facing in a width direction; first internal electrodes formed in the piezoelectric ceramic body and drawn to the first end surface; second internal electrodes formed in the piezoelectric ceramic body and drawn to the second end surface; a first terminal electrode formed on the first end surface; and a second terminal electrode formed on the second end surface, the first and second internal electrodes each having a width equal to a distance between the pair of side surfaces, at least one of the pair of side surfaces including a groove extending in non-parallel with the length direction.
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公开(公告)号：US08974687B2
公开(公告)日：2015-03-10
申请号：US13853796
申请日：2013-03-29
发明人： Hiroyuki Shimizu , Yutaka Doshida
IPC分类号： H01L41/083 , H01L41/187 , C04B35/495 , C04B35/626 , C04B35/645 , H01L41/43
CPC分类号： H01L41/1871 , C04B35/495 , C04B35/62685 , C04B35/645 , C04B2235/3201 , C04B2235/3208 , C04B2235/3213 , C04B2235/3251 , C04B2235/3255 , C04B2235/3262 , C04B2235/3263 , C04B2235/3265 , C04B2235/3418 , C04B2235/6021 , C04B2235/6027 , C04B2235/605 , C04B2235/76 , C04B2235/786 , C04B2235/787 , C04B2235/79 , C04B2235/80 , C04B2235/85 , H01L41/43
摘要： A piezoelectric ceramic is expressed by the composition formula 100[(Sr2−xCax)1+y/4Na1−yNb5−2/5zMnzO15]+αSiO2 (in the formula, 0≦x
摘要翻译： 压电陶瓷由组成式100 [（Sr2-xCax）1 + y / 4Na1-yNb5-2 / 5zMnzO15] +αSiO2表示（在式中，0＆nlE; x <0.3,0.1
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9.发明授权公开(公告)号：US11633761B2
公开(公告)日：2023-04-25
申请号：US16952506
申请日：2020-11-19
摘要： Provided is a driving apparatus that sets a signal wave in a low-frequency region having a frequency of 10 Hz or more and 250 Hz or less as a modulating wave and outputs to a piezoelectric actuator a driving signal having a waveform obtained by modulating an amplitude of a sine wave in a high-frequency region having a frequency of 20 kHz or more and 40 kHz or less with the modulating wave.
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公开(公告)号：US11631801B2
公开(公告)日：2023-04-18
申请号：US16833251
申请日：2020-03-27
发明人： Tomohiro Harada , Takayuki Goto , Ryo Ito , Hiroyuki Shimizu , Sumiaki Kishimoto
IPC分类号： H01L41/187 , H01L41/277 , H01L41/083 , H01L41/047
摘要： A multilayer piezoelectric ceramic is constituted by: piezoelectric ceramic layers which do not contain lead as a constituent element, have a perovskite compound expressed by the composition formula LixNayK1−x−yNbO3 (where 0.02
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