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    • 4. 发明授权
    • Driving apparatus and a recording and/or reproducing apparatus using the
same
    • 驱动装置和使用该装置的记录和/或再现装置
    • US5297130A
    • 1994-03-22
    • US832595
    • 1992-02-07
    • Masahiro TagawaToshihiko MiyazakiToshimitsu Kawase
    • Masahiro TagawaToshihiko MiyazakiToshimitsu Kawase
    • G01B7/34G01Q10/00G11B9/00G11B9/08H01L41/09H01L41/08
    • H02N2/028B82Y35/00G01Q10/04G11B9/1436H02N2/02H02N2/065B82Y10/00G01Q60/16G01Q80/00
    • A driving apparatus for driving an object comprises a pair of piezoelectric elements, one of them being arranged on the one side of the object while the other of them on the other side of the object, and the respective electrode arrangement directions of the pair of piezoelectric elements being substantially identical to each other, and a control circuit which applies a predetermined voltage across the outer electrodes of the pair of piezoelectric elements respectively, gives an equipotential to the inner electrodes thereof, and causes the pair of piezoelectric elements to drive the object by varying the value of the potential given to the inner electrodes. Hence, the increased amount of a voltage applied to one piezoelectric element is exactly identical to the decreased amount for the other so as to make the extended and contracted amounts of the piezoelectric elements on both sides of the object the same. Consequently, no useless stress is given to the piezoelectric elements for the prevention of the deterioration of the elements to implement a precise fine driving over a long period.
    • 用于驱动物体的驱动装置包括一对压电元件,其中一个压电元件被布置在物体的一侧,而另一个位于物体的另一侧,并且一对压电元件的各个电极排列方向 元件彼此基本相同,并且分别在一对压电元件的外部电极上施加预定电压的控制电路给予其内部电极等电位,并且使一对压电元件通过 改变给予内部电极的电位的值。 因此,施加到一个压电元件的电压的增加量与另一个压电元件的电压的减少量完全相同,从而使物体两侧的压电元件的伸长和收缩量相同。 因此,为了防止元件的劣化,长时间地实现精密的精细驱动,没有给压电元件带来无用的应力。