Discharge tube operation device

摘要

A time division signal (S2) 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 (S2). 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).