Patent ID: 6225751
Filing Date: 2001-05-01
Classification: H05B

Abstract:
An image exposure apparatus comprising:a transformer;a first clock signal generation unit adapted to generate a first clock signal of a first frequency;an inverter control circuit for outputting an inverter drive signal of the first frequency to drive a primary side of said transformer at the first frequency in accordance with the first clock signal generated by said first clock signal generation unit;a fluorescent lamp for exposing an original;a second clock signal generation unit adapted to generate a second clock signal of a second frequency; anda light modulation control circuit, connected to a secondary side of said transformer, for outputting a light modulation drive signal of the second frequency to control a current flowing in said fluorescent lamp in accordance with the second clock signal,wherein, although the first and second clock signals are supplied respectively to circuits of different sides of said transformer, at least a part of said first and second clock signal generation unit is structured by a common circuit, thereby generating the first and second clock signals mutually synchronous with each other.