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    • 8. 发明授权
    • Fluorescent lamp drive circuit of an image formation apparatus
    • 图像形成装置的荧光灯驱动电路
    • US06225751B1
    • 2001-05-01
    • US09110026
    • 1998-07-02
    • Shunichi Komatsu
    • Shunichi Komatsu
    • H05B3700
    • H05B41/295H05B41/3927
    • A copy machine comprises a fluorescent lamp inverter circuit for supplying a voltage necessary to light on a fluorescent lamp for exposing an original, an inverter control circuit for outputting an inverter drive signal of a first frequency to control the fluorescent lamp inverter circuit, a light modulation control circuit for outputting a light modulation drive signal of a second frequency to control a current flowing in the fluorescent lamp, and a synchronization circuit for synchronizing the inverter drive signal and the light modulation drive signal with each other by using a clock division circuit and a phase-locked loop (PLL) circuit. Thus, unevenness in exposing of the original is eliminated, thereby improving image quality.
    • 复印机包括用于将用于曝光原件的荧光灯上的光所需的电压提供的荧光灯反相器电路,用于输出第一频率的逆变器驱动信号以控制荧光灯反相器电路的逆变器控制电路,光调制 控制电路,用于输出第二频率的光调制驱动信号以控制在荧光灯中流动的电流;以及同步电路,用于使逆变器驱动信号和光调制驱动信号通过使用时钟分频电路和 锁相环(PLL)电路。 因此,消除了原稿的曝光不均匀,从而提高了图像质量。