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公开(公告)号：US06812623B2
公开(公告)日：2004-11-02
申请号：US10253757
申请日：2002-09-23
IPC分类号： H01L4108
CPC分类号： H05B41/2822 , H01L41/107
摘要： A compact and high-power piezoelectric transformer is realized by using higher order longitudinal extensional mode vibrations and increasing an effective electromechanical coupling factor by a primary electrode which consists of plural electrodes.
摘要翻译： 通过使用高阶纵向拉伸模式振动并通过由多个电极组成的主电极增加有效的机电耦合系数来实现小型和大功率的压电变压器。
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42.发明授权Sound reproducing apparatus for sound reproduction using an ultrasonic transducer via mode-coupled vibration 有权用于通过模式耦合振动使用超声波换能器进行声音再现的声音再现装置公开(公告)号：US09100755B2
公开(公告)日：2015-08-04
申请号：US13061762
申请日：2009-09-17
申请人： Katsu Takeda , Masaki Tada , Masashi Minakuchi , Fumiyasu Konno
发明人： Katsu Takeda , Masaki Tada , Masashi Minakuchi , Fumiyasu Konno
CPC分类号： H04R17/10 , H04R2217/03
摘要： In a sound reproducing apparatus, part of a frequency band where mode-coupled vibration can be excited is regarded as a carrier frequency. A frequency of mode coupling, with a low rate of change in vibration displacement with respect to the frequency, is regarded as a carrier signal so that a signal in an audible band which is outputted from an audible band signal source can be demodulated and reproduced with stable sound pressure in a broad frequency band.
摘要翻译： 在声音再现装置中，可以激励模式耦合振动的频带的一部分被认为是载波频率。 将振动位移相对于频率的低变化率的模式耦合的频率视为载波信号，使得从可听频带信号源输出的可听频带中的信号可以被解调和再现， 在宽频带内稳定的声压。
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公开(公告)号：US20130163795A1
公开(公告)日：2013-06-27
申请号：US13820441
申请日：2011-07-12
申请人： Katsu Takeda , Fumiyasu Konno , Susumu Fukushima , Rihito Shoji
发明人： Katsu Takeda , Fumiyasu Konno , Susumu Fukushima , Rihito Shoji
IPC分类号： H04R5/02
CPC分类号： H04R5/02 , H04R1/26 , H04R1/323 , H04R2217/03 , H04R2499/15 , H04S2400/01
摘要： Provided is a sound reproduction device including a loudspeaker and a superdirective speaker. The loudspeaker is configured so that a sound pressure of audible sound produced therefrom decreases as the sound travels farther away from the loudspeaker. The superdirective speaker is configured so that a sound pressure of audible sound produced therefrom has a peak at a predetermined distance from the superdirective speaker, and is configured to use an ultrasonic wave as a carrier wave. The loudspeaker and the superdirective speaker are positioned such that a loudspeaker sound field of the audible sound produced from the loudspeaker and a superdirective speaker sound field of the audible sound produced from the superdirective speaker overlap with each other at a position of a listener.
摘要翻译： 提供了包括扬声器和超向量扬声器的声音再现装置。 扬声器被配置为使得由其产生的可听见的声音的声压随着声音越来越远离扬声器而减小。 超声波扬声器被配置为使得从其产生的可听见的声音的声压在距离超声向扬声器预定距离处具有峰值，并且被配置为使用超声波作为载波。 扬声器和超向扬声器被定位成使得从扬声器产生的可听见的声音的扬声器声场和从超声向扬声器产生的可听见的声音的超声向扬声器声场在收听者的位置彼此重叠。
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公开(公告)号：US07370396B2
公开(公告)日：2008-05-13
申请号：US11564142
申请日：2006-11-28
申请人： Akihiko Namba , Keiji Onishi , Katsu Takeda
发明人： Akihiko Namba , Keiji Onishi , Katsu Takeda
CPC分类号： H03H9/564 , B41J2002/14266 , H03H3/04 , H03H9/173 , H03H9/174 , H03H9/175 , H03H2003/0435 , H03H2003/0478 , Y10T29/42 , Y10T29/49005 , Y10T29/49128 , Y10T29/4913 , Y10T29/49135
摘要： An electronic component includes a substrate; a piezoelectric material layer supported directly or indirectly by the substrate; a first electrode arranged on a surface of the piezoelectric material layer on an opposite side of the substrate; and a second electrode arranged on a surface of the piezoelectric material layer on the substrate side. The piezoelectric material layer is sandwiched between the first electrode and the second electrode. The first electrode has a smaller surface area than the piezoelectric material layer. A portion where the piezoelectric material layer is exposed from the first electrode includes a portion that is thinner than a thickness of the piezoelectric material layer between the first electrode and the second electrode. Thus, it is possible to configure a resonator with a higher frequency than its ordinary resonance, and it is easy to achieve an adjustment of the resonance frequency of the resonator, as well as improving the yield of the component and enabling the configuration of an electronic component that includes a plurality of resonators of different frequencies.
摘要翻译： 电子部件包括基板; 由衬底直接或间接支撑的压电材料层; 布置在所述压电材料层的与所述基板相反的一侧的表面上的第一电极; 以及设置在基板侧的压电体层的表面上的第二电极。 压电材料层夹在第一电极和第二电极之间。 第一电极具有比压电材料层更小的表面积。 压电材料层从第一电极露出的部分包括比第一电极和第二电极之间的压电材料层的厚度薄的部分。 因此，可以构成具有比其普通谐振更高的频率的谐振器，并且容易实现谐振器的谐振频率的调节，以及提高元件的产量并且能够构造电子 分量，其包括多个不同频率的谐振器。
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公开(公告)号：US07038354B2
公开(公告)日：2006-05-02
申请号：US10306516
申请日：2002-11-27
IPC分类号： H01L41/107
CPC分类号： H05B41/2822 , H01L41/044 , H05B41/2855 , H05B41/392
摘要： A driving circuit for a piezoelectric transformer is provided, which ensures lighting of all the cold-cathode tubes connected to the piezoelectric transformer, and reduces the difference in brightness between the cathode tubes during steady lighting, thereby enhancing reliability and performance. A plurality of cold-cathode tubes connected to a secondary side of the piezoelectric transformer, and a cold-cathode tube output detector circuit connected in series to a plurality of cold-cathode tubes, for detecting an output state of the respective cold-cathode tubes are provided, and the driving of the piezoelectric transformer is controlled based on a detection signal from the cold-cathode tube output detector circuit. Because of this, the piezoelectric transformer performs the same operation as that with respect to one cold-cathode tube.
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46.发明授权Piezoelectric transformer, piezoelectric transformer unit, inverter circuit, light emission control device, and liquid crystal display device 失效压电变压器，压电变压器单元，逆变电路，发光控制装置和液晶显示装置公开(公告)号：US07030538B2
公开(公告)日：2006-04-18
申请号：US10172589
申请日：2002-06-14
IPC分类号： H01L41/08
CPC分类号： H05B41/2822 , H01L41/107
摘要： A low loss, small scale piezoelectric transformer, suited for a cold cathode tube load, and having a high effective coupling factor, is provided using a piezoelectric plate having a single polarization direction. Controlling the dimensions of the third electrode portion 15a constituting the high impedance portion makes it possible easily to adjust the capacitance of the electrostatic capacitor formed between the first electrode portion 12 and the third electrode portion in accordance with the load. Also, the second electrode portion 13 and the fourth electrode portion 15b constituting the low impedance portion are substantially equal in area and the third electrode portion and the fourth electrode portion are formed in one piece, so that energy propagation efficiency can be increased. Consequently, the effective coupling factor resulting from the electrode structure and the vibration mode can be kept high even if the capacitance is changed freely, and thus high element efficiency and a small amount of generated heat can be maintained and stress can be decreased.
摘要翻译： 使用具有单一偏振方向的压电板，提供适用于冷阴极管负载并具有高有效耦合系数的低损耗小型压电变压器。 控制构成高阻抗部分的第三电极部分15a的尺寸使得可以容易地根据负载来调节形成在第一电极部分12和第三电极部分之间的静电电容器的电容。 此外，构成低阻抗部的第二电极部13和第四电极部15b的面积大致相等，第三电极部和第四电极部形成为一体，能够提高能量传播效率。 因此，即使电容自由变化，由电极结构和振动模式产生的有效耦合因子也能够保持较高，从而可以保持高的元件效率和少量的发热，并且可以降低应力。
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公开(公告)号：US06989626B2
公开(公告)日：2006-01-24
申请号：US10894757
申请日：2004-07-20
IPC分类号： H01L41/107
CPC分类号： H05B41/2822 , H01L41/107
摘要： A compact and high-power piezoelectric transformer is realized by using higher order longitudinal extensional mode vibrations and increasing an effective electromechanical coupling factor by a primary electrode which consists of plural electrodes.
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公开(公告)号：US06566821B2
公开(公告)日：2003-05-20
申请号：US10024415
申请日：2001-12-21
IPC分类号： H01L4108
CPC分类号： H05B41/2822 , H05B41/2855 , H05B41/392
摘要： The present invention relates to a drive device for one or more series-connected cold cathode fluorescent lamps having an electrical terminal at each end. The drive device has a piezoelectric transformer for converting by means of the piezoelectric effect a primary ac input applied to primary electrodes to a secondary ac output, which is removed from secondary electrodes; a drive arrangement for applying the primary ac input to the primary electrodes; and a brightness control circuit for controlling brightness. The drive device is configured so that the end electrical terminals of the cold cathode fluorescent lamp can be connected between the two secondary electrodes. The brightness control circuit detects the phase difference between the secondary ac output and the primary ac input. When the detected phase difference is greater than a specified phase difference, the drive arrangement reduces the power of the primary ac input applied to the primary electrodes. If the detected phase difference is less than the specified phase difference, the drive arrangement increases the power of the primary ac input applied to the primary electrodes.
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