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    • 54. 发明授权
    • Piezoelectric actuator drive system
    • 压电执行器驱动系统
    • US07135807B2
    • 2006-11-14
    • US10994459
    • 2004-11-23
    • Byoung Own MinHyoung Jun JeonHyun Jin Kim
    • Byoung Own MinHyoung Jun JeonHyun Jin Kim
    • H01L41/09H02N2/06
    • H02N2/0075H02N2/147
    • Disclosed herein is a piezoelectric actuator drive system for forward or backward driving a piezoelectric actuator for zooming and/or focusing in a camera module. The piezoelectric actuator drive system comprises a power supply for supplying an operating voltage, a drive controller for controlling generation of a forward/backward drive signal for a piezoelectric actuator in response to an operation ON select signal and a forward/backward driving select signal, a clock generator for generating a first clock signal in response to the operating voltage from the power supply, and a drive signal generator for generating and supplying the forward or backward drive signal to the piezoelectric actuator in response to the first clock signal from the clock generator and the operating voltage from the power supply under the forward/backward drive signal generation control of the drive controller.
    • 这里公开了一种压电致动器驱动系统,用于在相机模块中向前或向后驱动用于变焦和/或聚焦的压电致动器。 压电致动器驱动系统包括用于提供工作电压的电源,用于响应于操作ON选择信号和前进/后退驱动选择信号控制压电致动器的前进/后退驱动信号的产生的驱动控制器, 时钟发生器,用于响应于来自电源的工作电压产生第一时钟信号;以及驱动信号发生器,用于响应于来自时钟发生器的第一时钟信号而向前述或后向驱动信号产生并提供前述或后退的驱动信号给压电致动器;以及 在驱动控制器的前进/后退驱动信号发生控制下来自电源的工作电压。