DISCHARGE LAMP LIGHTING DEVICE

PROBLEM TO BE SOLVED: To surely detect a non-emission state of a discharge lamp even if it is a one-side non-emission state. SOLUTION: This discharge lamp lighting device is so composed that a discharge lamp L is lit by applying a high-frequency voltage to the discharge lamp L through a ballast choke T1, and a non-emission state of the discharge lamp L is detected by a non-emission state detection circuit B. In this case, the non-emission state detection circuit B is provided with a pair of secondary windings n2, n3 formed in the ballast choke T1 so as to have polarities different from each other and a voltage comparison means F for comparing induced voltages induced in the pair of secondary windings n2, n3, and is so structured as to detect the non-emission state when the voltage difference between the induced voltages is set to a predetermined value or above.