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

摘要

PROBLEM TO BE SOLVED: To reduce damage to coil parts and electrodes while ensuring a longer life to a discharge lamp.SOLUTION: A light source device 1 includes: a discharge lamp 500 having a pair of electrodes 610, 710; and a drive device 200. The drive device 200 includes a supply section 30 for supplying an AC current to the pair of electrodes 610, 710, and a control section 33 for controlling the supply section 30 as alternately repeating a first period of high frequency drive and a second period of low frequency drive. The control section 33 controls the supply section 30 in the first period so as to generate an AC current switching among a plurality of types of waveforms having frequencies equal to or higher than 1 kHz and periods different from each other, and controls the supply section 30 in the second period so as to generate an AC current having a frequency below 1 kHz.