Patent ID: 8952621
Filing Date: 2015-02-10
Classification: G03B,H01J,H05B,Y02B

Abstract:
1. A high pressure discharge lamp lighting device for lighting, by supply of an electric current, a high pressure discharge lamp including a glass bulb with a halogen substance sealed therein and with a pair of electrodes positioned therein in opposing positions to one another, the high pressure discharge lamp lighting device comprising: a polarity inverting unit configured to invert polarity of the current to be supplied to the high pressure discharge lamp; a current modifying unit configured to modify an absolute value of the current; and a control unit configured to control the polarity inverting unit and the current modifying unit, wherein the control unit controls the polarity inverting unit to repeat a first period and a second period, the control unit controls the current modifying unit to maintain the absolute value of the current at a first current value during at least part of the first period, and maintain the absolute value of the current at a second current value, greater than the first current value, during the second period.