| 摘要 |
PROBLEM TO BE SOLVED: To provide a discharge lamp lighting circuit capable of avoiding the problem of an increase of standby power caused by a discharging circuit without particularly arranging a discharging circuit such as a resistor, and solving the problem of a residual charge by discharging a charge between input power terminals after power cutoff. SOLUTION: This discharge lamp lighting device includes capacitors C1 and C2 between input power lines, and is provided with a step-up chopper circuit 20 as a power conversion circuit converting input power and driving a discharge lamp, and an inverter circuit 21. When the cutoff state of input power is detected based on the output of an A.C. input detection circuit 11, the step-up chopper circuit 20 is operated to forcibly discharge the capacitors C1 and C2 between the input power lines, and a voltage between terminals T1-T2 is rapidly set to 0. COPYRIGHT: (C)2009,JPO&INPIT |
