Discharge lamp lighting device and illumination fixture

摘要

[Object] To provide a discharge lamp lighting device and an illumination fixture suppressing a flicker and an imperfect lighting at the time of shifting to the steady operation.

[Means for Settlement] It is provided with a resonator configuring a load circuit with a discharge lamp DL, and a controller 3 driving switching elements Q2 to Q5 in a full-bridge circuit. The start frequency to drive the switching elements Q2 to Q5 in the full-bridge circuit during the actuation operation of the discharge lamp DL by the controller 3 is set to the frequency close to 1/odd-number of the resonance frequency of the load circuit with the discharge lamp DL unlit, to the extent capable of making the discharge lamp DL start discharging, and also to the frequency close to the resonance frequency of the load circuit with the discharge lamp DL lit, to the extent capable of sufficiently raising the temperature of each electrode of the discharge lamp DL by the end of the actuation operation.