HIGH PRESSURE DISCHARGE LAMP LIGHTING DEVICE AND LIGHT SOURCE EQUIPMENT

摘要

Short rise and fall of a lamp voltage in frequency control of a high pressure discharge lamp device are suppressed. The high pressure discharge lamp lighting device AC-lights a high pressure discharge lamp having a pair of facing electrodes with a synthetic current waveform consisting of a plurality of frequency components. The device is provided with a control means for controlling a contained component ratio per unit time of a plurality of the frequency components, an output means for applying the synthetic current waveform in accordance with the contained component ratio to the high pressure discharge lamp, and a detecting means for detecting a lamp parameter relating to the high pressure discharge lamp. A control circuit is constituted such that the contained component ratio is shifted to a first contained component ratio when the lamp parameter is in a first state, the contained component ratio is shifted to a second contained component ratio when the lamp parameter is in a second state, and the contained component ratio is changed stepwise at the time of shifting the contained component ratio from the first contained component ratio to the second contained component ratio or from the second contained component ratio to the first contained component ratio.