HIGH-PRESSURE DISCHARGE LAMP LIGHTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a small-size and low-priced high-pressure discharge lamp lighting device capable of being restarted at a practically trouble-free level for requirements of instantaneous restart. SOLUTION: A lighting device 1 receives power supply from an AC power source AC to supply proper power to a high-pressure discharge lamp La and to effect stable lighting. A pulse generation means 2 generates a high voltage pulse Vp3 so that the high-pressure discharge lamp La is started by causing an electric breakdown. A peak value of the high voltage pulse Vp3 output from the pulse generation means 2 at the time of start is not more than a maximum value VpMAX of an electric breakdown voltage in the relationship between extinction timeτand the electric breakdown voltage, and is not less than a second peak value VpMAX lower than the maximum value VpMAX, and is set to the electric breakdown voltage VpMIN or more when the high-pressure discharge lamp La is started after sufficiently long extinction timeτelapses. As a result, the peak value of the high voltage pulse Vp3 can be lowered to enable restart of a small-size and low-priced lighting device 1 at a practically trouble-free level for requirements of instantaneous restart.