Discharge lamp lighting device and illumination fixture and projector using the same

摘要

[Object] To realize necessary and sufficient electrode heating and thus forming stable discharge without complicating the circuit structure. [Means for Settlement] A discharge lamp lighting device 1 includes a full bridge circuit 11 for converting received DC power into AC power, a starting circuit 12 for generating a starting high voltage to cause a dielectric breakdown in a lamp DL, a step-down chopper 13 for stepping down a voltage outputted from a DC power source E and outputting the voltage to the full bridge circuit 11, a lamp lighting state detection part 14 for detecting a lighting state of the lamp DL, and a control circuit 15 for controlling the full bridge circuit 11 and the starting circuit 13. The control circuit 15 sets the amount of power supplied to the lamp in an electrode heating period in starting the lamp in accordance with a cumulative lighting time detected by the lamp lighting state detection part 14.