| 摘要 |
<p>A feeding device for a discharge lamp for completely preventing discharge failure of a high-pressure mercury vapor lamp in which a large amount of mercury is sealed. The feeding device (2) comprises a pseudo arc discharge resistor (59), provided between the output terminals of the feeding device (2) and the resistance of which is approximately equal to the arc discharge resistance of a high-pressure mercury vapor lamp, is connected in such a way that the pseudo arc discharge resistor (59) can be changed to pseudo glow discharge resistors (59, 60) the resistance of which is approximately 1/7 of the glow discharge resistance. Said feeding device (2) is having characteristics such that, in a transition state where the pseudo arc discharge resistor is changed to the pseudo glow discharge resistors from the state where the pseudo arc discharge resistor is connected to the feeding device, the duration of the pseudo glow discharge current continues to be not greater than 30% of the pseudo arc discharge current is not longer than 10 νs, and the time taken for the pseudo glow discharge current to recover to at least 70% of the pseudo arc discharge current is not longer than 100 νs.</p> |
