| 摘要 |
PROBLEM TO BE SOLVED: To provide a discharge lamp ignition device for lighting a high-intensity discharge lamp in which, during alternating current ignition of the discharge lamp, the fluctuation of luminous flux on the reversal of polarity of the voltage impressed on the lamp is minimized and in which steady lighting characteristics of the discharge at startup are secured. SOLUTION: This discharge lamp ignition device has a capacitor Ch connected to a transformer Th and an intermittent voltage impression means Uj for executing voltage impression drive on the primary winding Ph. The secondary winding Sh of the transformer Th is structured so that the voltage generated in the secondary winding Sh can be impressed, overlapping the output voltage of an inverter Ui, between the electrodes of the discharge lamp Ld by interposing it in the path connecting the output of the inverter Ui and the electrode for the main discharge of the discharge lamp Ld. COPYRIGHT: (C)2007,JPO&INPIT |
