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公开(公告)号：EP1439435A1
公开(公告)日：2004-07-21
申请号：EP03791364.7
申请日：2003-08-28
CPC分类号： G04C3/12 , H01L41/0906
摘要： In order to provide an electronic timepiece having high transfer efficiency and a compact and thin structure, there are provided a plate-like piezoelectric actuator 341, a driven body 343 driven with a vibration of the piezoelectric actuator 341, and a time-indicating mechanism 5 operating with a drive of the driven body 343 via a transfer mechanism 4.
摘要翻译： 为了提供具有高转印效率和紧凑且薄型结构的电子表，提供了一种板状压电致动器341，由压电致动器341的振动驱动的从动体343和时间指示机构5 通过传送机构4与驱动体343的驱动一起操作
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2.发明授权PIEZOELECTRIC ACTUATOR DRIVE DEVICE, ELECTRONIC DEVICE, AND DRIVE METHOD THEREOF 有权压电致动器驱动，电子设备和保证行车
公开(公告)号：EP1737114B1
公开(公告)日：2011-06-08
申请号：EP05720478.6
申请日：2005-03-10
CPC分类号： H02N2/062 , G04C3/12 , G04C17/005 , H01L41/0906
摘要： There is provided an electronic device comprising a piezoelectric actuator (A) and a drive control device (100) for controlling drive of the piezoelectric actuator. The drive control device (100) includes: a drive circuit (111) for supplying a drive signal SDR to a piezoelectric element of an oscillator (12); phase difference detection means (120) for detecting a phase difference representing the oscillation state of the oscillator (12); a comparison voltage setting circuit (133) for correcting a target phase difference serving as a target of the oscillation state; and drive frequency setting means (140) for comparing the phase difference to the target phase difference. By modifying the drive frequency of the drive signal SDR so that the phase difference approaches the target phase difference according to the comparison result, it is possible to realize effective drive of the piezoelectric actuator (A) without depending on the drive voltage.
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公开(公告)号：EP1895650B1
公开(公告)日：2009-11-11
申请号：EP06767152.9
申请日：2006-06-22
发明人： SAWADA, Akihiro , KITAHARA, Joji
CPC分类号： G04C3/12 , H02N2/004 , H02N2/0055 , H02N2/103
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4.发明公开PIEZOELECTRIC ACTUATOR AND ELECTRONIC DEVICE HAVING THE SAME 有权ELEKTRONISCHE VORRICHTUNG DAMIT的PIEZOELEKTRISCHER AKTUATOR
公开(公告)号：EP1895650A1
公开(公告)日：2008-03-05
申请号：EP06767152.9
申请日：2006-06-22
发明人： SAWADA, Akihiro , KITAHARA, Joji
CPC分类号： G04C3/12 , H02N2/004 , H02N2/0055 , H02N2/103
摘要： There are provided a piezoelectric actuator whose design does not become difficult, and in which an impact resistance can be greatly improved without incurring a decrease in a drive efficiency, and an electronic equipment having possessed the same.
When a piezoelectric actuator 31 has been incorporated to a main plate 14, an arm part 513 of a vibration body 50 is disposed through interstices SP1, SP2 of predetermine dimensions between it and a protrusion part 144. Only by causing the interstices SP1, SP2 like these to intervene, at a drive time, notwithstanding the fact that a free end part FR is in a free state in these interstices SP1, SP2, since a vibration part 511 is captured by the protrusion part 144 in a free end part FR side when an external impact has been exerted, it is possible to prevent the vibration part 511 from moving while exceeding the dimensions of the interstices. By this, it is possible to easily and greatly improve the impact resistance corresponding to a fall impact and the like without incurring the decrease in the drive efficiency, and it is possible to solve together problems relating to the drive efficiency and the impact resistance, which are usually difficult to be compatible.摘要翻译： 提供了一种压电致动器，其设计不会变得困难，并且其中可以极大地提高耐冲击性而不会降低驱动效率，以及具有该压电致动器的电子设备。 当压电致动器31已经被结合到主板14中时，振动体50的臂部513通过在其与突出部144之间的预定尺寸的间隙SP1，SP2设置。仅通过使间隙SP1，SP2像 这些在驱动时间干涉，尽管自由端部FR在这些间隙SP1，SP2中处于自由状态，因为振动部分511被突出部分144在自由端部分FR侧捕获，当 已经发生外部冲击，可以防止振动部511在超过间隙的尺寸的情况下移动。 由此，可以容易且大幅度地提高与落下冲击等相应的冲击强度，而不会降低驱动效率，并且可以一起解决与驱动效率和耐冲击性有关的问题， 通常难以兼容。
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公开(公告)号：EP1355412B1
公开(公告)日：2007-06-06
申请号：EP02707159.6
申请日：2002-03-26
摘要： A piezoelectric actuator has a diaphragm which has a tabular piezoelectric element oscillated in a longitudinal oscillation mode and a flexural oscillation mode. The face of the diaphragm has the disposition of a first electrode for sensing the amplitude of an oscillation in the longitudinal oscillation mode and a second electrode for sensing the amplitude of an oscillation in the flexural oscillation mode. Before the piezoelectric actuator is driven by a drive signal, a phase difference of a first sense signal output from the first electrode and a second sense signal output from the second electrode is sensed. Such a frequency that the sensed phase difference becomes maximum is determined, and a drive signal with a frequency coincident with that frequency is given to the piezoelectric element.
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公开(公告)号：EP1355412A1
公开(公告)日：2003-10-22
申请号：EP02707159.6
申请日：2002-03-26
IPC分类号： H02N2/00
摘要： A piezoactuator has a diaphragm, and the diaphragm has flat piezoelectric elements that oscillate in a longitudinal oscillation mode and a sinusoidal oscillation mode. A first electrode for detecting oscillation in the longitudinal oscillation mode, and a second electrode for detecting the amplitude of oscillation in the sinusoidal oscillation mode, are disposed on the surface of the diaphragm. When the piezoactuator is driven with a drive signal, the phase difference of a first detection signal output from the first electrode and a second detection signal output from the second electrode is detected. The frequency at which the detected phase difference becomes the maximum phase difference is then obtained, and a drive signal of a matching frequency is applied to the piezoelectric elements.
摘要翻译： 压电致动器具有隔膜，并且隔膜具有以纵向振荡模式和正弦振荡模式振荡的平坦的压电元件。 用于检测纵向振荡模式中的振荡的第一电极和用于检测正弦振荡模式中的振荡幅度的第二电极设置在隔膜的表面上。 当用驱动信号驱动压电致动器时，检测从第一电极输出的第一检测信号和从第二电极输出的第二检测信号的相位差。 然后获得检测到的相位差成为最大相位差的频率，并且将匹配频率的驱动信号施加到压电元件。
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