DISCHARGE LAMP DRIVING DEVICE, LIGHT SOURCE DEVICE, PROJECTOR, AND DISCHARGE LAMP DRIVING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a discharge lamp driving device capable of improving a service life of a discharge lamp.SOLUTION: One aspect of a discharge lamp driving device of the present invention comprises: a discharge lamp driving unit which supplies driving power to a discharge lamp; a control unit which controls the discharge lamp driving unit; and a voltage detecting unit which detects an inter-electrode voltage of the discharge lamp. The control unit can execute power fluctuation driving for periodically fluctuating the driving power to be supplied to the discharge lamp. In power fluctuation driving, the control unit fluctuates a frequency of the driving power on the basis of a first inter-electrode voltage detected by the voltage detecting unit.SELECTED DRAWING: Figure 8