DISCHARGE LAMP OPERATION DEVICE AND PROJECTOR

摘要

A DC-DC converter (111) having a switching element (Q11) changes the power supply of a high-luminance discharge lamp (DL1). The ON/OFF of the switching element (Q11) is controlled by a control circuit (13). The control circuit (13) controls the ON/OFF state of the switching element (Q11) by the constant lamp power control when the lamp is stably lit. The control circuit (13) controls the ON/OFF state of the switching element (Q11) so that a lamp power greater than the lamp power by the constant power control is supplied to the lamp according to the high power control during the lamp lit period. Thus, it is possible to appropriately maintain the temperature of the lamp electrode and in the bulb and suppress generation of flicker and deterioration of the electrode by a simple control.