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    • 6. 发明授权
    • Driving device and optical apparatus
    • 驱动装置和光学装置
    • US07986477B2
    • 2011-07-26
    • US12493654
    • 2009-06-29
    • Hideo Yoshida
    • Hideo Yoshida
    • G02B7/02
    • H02N2/067G02B7/102H02N2/025
    • A driving device is provided and includes: an actuator that includes a driving shaft attached to a piezoelectric element; and a driving signal control unit. The piezoelectric element is expanded and contracted in response to a driving signal. The driving shaft is reciprocated by the expansion and contraction operation of the piezoelectric element to move a driven member that is frictionally engaged with the driving shaft. The driving signal control unit outputs to the piezoelectric element a second driving signal that increases a driving force applied to the driven member and reduces the movement speed of the driven member during a period from the start of the expansion and contraction operation of the piezoelectric element to a predetermined time, as compared to a first driving signal output when the driven member is moved after the period has elapsed.
    • 提供一种驱动装置,包括:致动器,其包括附接到压电元件的驱动轴; 和驱动信号控制单元。 压电元件响应于驱动信号而膨胀和收缩。 驱动轴通过压电元件的膨胀和收缩操作往复运动,以使与驱动轴摩擦接合的从动构件移动。 驱动信号控制单元向压电元件输出增加施加到从动构件的驱动力的第二驱动信号,并且在从压电元件的膨胀和收缩操作开始的时段期间降低从动构件的移动速度到 与经过该时间段后的被驱动部件移动时的输出的第一驱动信号相比,预定时间。