DISCHARGE LAMP FLASHING DEVICE AND MANUSCRIPT EXPOSURE DEVICE

摘要

A lighting device of a discharge lamp and an exposure device are provided to control accurately the amount of light by varying a driving frequency of the discharge lamp according to a lighting signal of a lighting signal generation circuit. A discharge lamp drive circuit is used for lighting a discharge lamp(6) including capacitive elements by a radio frequency. A voltage acquisition circuit is used for obtaining a voltage applied to the discharge lamp(6) by a switching element. A lighting signal generation circuit(20) is used for generating a lighting signal in order to light the discharge lamp(6). A frequency variation circuit is used for varying a driving frequency of the discharge lamp(6) according to the lighting signal of the lighting signal generation circuit(20).