发明授权
US5297130A Driving apparatus and a recording and/or reproducing apparatus using the
same
失效
驱动装置和使用该装置的记录和/或再现装置
- 专利标题: Driving apparatus and a recording and/or reproducing apparatus using the same
- 专利标题(中): 驱动装置和使用该装置的记录和/或再现装置
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申请号: US832595申请日: 1992-02-07
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公开(公告)号: US5297130A公开(公告)日: 1994-03-22
- 发明人: Masahiro Tagawa , Toshihiko Miyazaki , Toshimitsu Kawase
- 申请人: Masahiro Tagawa , Toshihiko Miyazaki , Toshimitsu Kawase
- 申请人地址: JPX Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX3-37746 19910208
- 主分类号: G01B7/34
- IPC分类号: G01B7/34 ; G01Q10/00 ; G11B9/00 ; G11B9/08 ; H01L41/09 ; H01L41/08
摘要:
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.
公开/授权文献
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