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公开(公告)号：US20210408363A1
公开(公告)日：2021-12-30
申请号：US17473221
申请日：2021-09-13
IPC分类号： H01L41/09 , H01L41/053 , H01L41/047
摘要： A low-profile ultrasonic wave generation device is provided that includes a drive unit having a piezoelectric member and an electrode formed on a surface of the piezoelectric member. The drive unit as a whole vibrates flexurally. The connection member is connected to a portion of the drive unit that includes a point of maximum displacement of the drive unit when the drive unit is subjected to flexural vibration. The vibrating unit is connected to the connection member. The vibrating unit vibrates due to the flexural vibration of the drive unit being transmitted by the connection member and thereby generates ultrasonic waves.
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公开(公告)号：US11350223B2
公开(公告)日：2022-05-31
申请号：US16886836
申请日：2020-05-29
发明人： Shinichi Sasaki , Takaaki Asada
IPC分类号： H04R23/00 , H04R1/10 , B32B38/08 , F01D25/04 , H04R31/00 , B32B37/10 , H04R29/00 , H04R19/00
摘要： A thermal excitation acoustic-wave-generating device includes a first acoustic wave source that includes a first heating element and a substrate that includes a main surface along which the first heating element is disposed, a second acoustic wave source that includes a second heating element and a facing body that includes a main surface along which the second heating element is disposed, and a pair of electrodes connected to the first and second heating elements. The first and second acoustic wave sources are arranged such that the first and second heating elements are separated from each other and face each other. The pair of electrodes are disposed between the first and second acoustic wave sources.
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3.发明申请PIEZOELECTRIC TRANSFORMER, PIEZOELECTRIC TRANSFORMER MODULE, AND WIRELESS POWER TRANSMISSION SYSTEM 审中-公开压电变压器，压电变压器模块和无线电力传输系统公开(公告)号：US20140265624A1
公开(公告)日：2014-09-18
申请号：US14291703
申请日：2014-05-30
发明人： Keiichi Ichikawa , Takaaki Asada , Takashi Kawada
IPC分类号： H01L41/107 , H02J17/00
CPC分类号： H01L41/107 , H02J7/025 , H02J17/00 , H02J50/05 , H02M5/48
摘要： A piezoelectric transformer includes a rectangular plate-shaped piezoelectric board having a length L in a longitudinal direction. In the piezoelectric board, five regions having a length L/5 are formed. In the two of regions, inner electrodes are formed in a thickness direction and conducted to outer electrodes provided in these regions. In a third region, outer electrodes are provided. The two regions of the piezoelectric board are polarized in the thickness direction, and two adjacent regions thereof are polarized in the longitudinal direction, and the third region is non-polarized. When a voltage is applied to the outer electrodes, the piezoelectric board expands and contracts in the longitudinal direction due to a piezoelectric effect. Thus, a piezoelectric transformer which enables high-efficient energy conversion even when a driving frequency is increased and a wireless power transmission system using the piezoelectric transformer are provided.
摘要翻译： 压电变压器包括长度方向上具有长度L的矩形板状压电板。 在压电板中，形成长度为L / 5的五个区域。 在两个区域中，内部电极沿厚度方向形成并且传导到设置在这些区域中的外部电极。 在第三区域中，设置有外部电极。 压电板的两个区域在厚度方向上极化，并且其两个相邻区域在纵向方向上极化，而第三区域是非极化的。 当对外部电极施加电压时，压电板由于压电效应而在纵向方向上膨胀和收缩。 因此，即使提供驱动频率也能够实现高效能量转换并且提供使用压电变压器的无线电力传输系统的压电变压器。
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公开(公告)号：US11561297B2
公开(公告)日：2023-01-24
申请号：US16886835
申请日：2020-05-29
发明人： Shinichi Sasaki , Takaaki Asada
摘要： A thermal excitation acoustic-wave-generating device includes a first heating element, a substrate that includes a main surface along which the first heating element is disposed, and a facing body that faces the substrate with the first heating element interposed therebetween. The substrate and the facing body define a path for an acoustic wave. A length of the path is close to a whole number multiple of ¼ of a wavelength of the acoustic wave.
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