DISCHARGE LAMP LIGHTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a discharge lamp lighting device realizing power control capable of quickening the rise of an optical output of a discharge lamp while suppressing its overshoot. SOLUTION: The amount of power shift outputted as a power shift amount command value WS by a power shift command generating part 8 is varied with time and its time function curve is given an inflection point, and the average inclination in a period from its starting point to the inflection point is set smaller than the average inclination in a period of the same time length from the inflection point downward. The inflection point is adapted to be a fixed value near the amount of power shift corresponding to the maximum output power.