| 摘要 |
To provide a power-supply device for electric discharge lamps in which lamp extinguishing is completely prevented in high-pressure mercury vapor lamps with a comparatively large amount of mercury sealed within. The power-supply device for electric discharge lamps that lights high pressure mercury vapor lamps with a comparatively large amount of mercury sealed within is characterized by a switchable connection from the connection state of simulated arc discharge resistor 59 virtually equal to the arc discharge resistance of said high-pressure mercury vapor lamp to the connection state of simulated glow discharge resistors 59, 60 that have virtually 1/7 of the glow discharge resistance that is completed at the output terminal of the power-supply device 2 for electric discharge lamps in question, said simulated arc discharge resistor is connected to the power-supply device for electric discharge lamps in question, and the simulated glow discharge current in the transient state of switch from the state of flow of simulated arc discharge current to said simulated glow discharge resistor continues to be under 30% of said simulated arc discharge current for less than 10 mu s and the duration until the current recovers to at least 70% of said simulated arc discharge current is less than 100 mu s. <IMAGE> |
