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    • 6. 发明授权
    • Fluorescent lamp controller and original-document exposing apparatus a
having the fluorescent lamp contoller
    • 荧光灯控制器和具有荧光灯调光器的原稿曝光装置a
    • US5659227A
    • 1997-08-19
    • US494786
    • 1995-06-26
    • Takahiro UshiroKazuki MiyamotoNaoyuki OhkiShinichi Takata
    • Takahiro UshiroKazuki MiyamotoNaoyuki OhkiShinichi Takata
    • H05B41/295H05B37/02
    • H05B41/295
    • A fluorescent lamp controller for an original-document exposing apparatus includes a detection circuit for detecting the quantity of light emitted by a fluorescent lamp, an actuator for applying between filaments of the fluorescent lamp a voltage having a duty that is determined in accordance with the quantity of light detected, and a preheating circuit for preheating each of the filaments of the fluorescent lamp by applying a preheating voltage. According to the present invention, the actuator applies, between the filaments of the fluorescent lamp, a voltage having a duty which is smaller than the full duty regardless of a result of the quantity of light detected in a predetermined period at a start of turning the fluorescent lamp on, and the preheating circuit applies the preheating voltage to each of the filaments of the fluorescent lamp simultaneously with the application of the turning on voltage.
    • 用于原稿曝光装置的荧光灯控制器包括用于检测由荧光灯发射的光量的检测电路,用于在荧光灯的灯丝之间施加具有根据数量确定的占空比的电压的致动器 的光,以及预热电路,用于通过施加预热电压来预热荧光灯的每根灯丝。 根据本发明,致动器在荧光灯的灯丝之间施加具有小于满负荷的占空比的电压,而不管在转动开始时在预定时间段内检测到的光量的结果如何 荧光灯开启,并且预热电路在施加导通电压的同时将预热电压施加到荧光灯的每个灯丝。