Discharge tube operation device

摘要

A time division signal (S 2 ) for instructing a lit period and an unlit period of a discharge tube ( 23 ) is input to an error amplifier ( 41 ) of an integration circuit ( 40 ). The integration circuit ( 40 ) charges and discharges a capacitor ( 42 ) in accordance with the time division signal (S 2 ). By utilizing this operation, a control circuit ( 49 ) adjusts a current flowing through the discharge tube ( 23 ) to light and extinguish the discharge tube ( 23 ).