Lighting device for discharge lamp

Details Lighting device for discharge lamp Lighting device for discharge lamp

2007-04-24

2007-04-24

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Periodic switch cut-out

C315S226000, C315S276000, C315S291000

Reexamination Certificate

active

11137466

ABSTRACT:
A lighting device for high-pressure discharge lamp for lighting the high-pressure discharge lamp by lowering or raising a DC voltage applied to an input side by a DC/DC converter circuit, then converting the DC power into an AC power by a DC/AC inverter circuit, supplying the AC power to the high-pressure discharge lamp and lighting the high-pressure discharge lamp, wherein when the polarity of the current of the high-pressure discharge lamp lit by the substantially rectangular wave is inverted, the output voltage of the DC/DC converter circuit is set to 1.5 times or more as large as the voltage at the stable lighting time of the high-pressure discharge lamp.

REFERENCES:
patent: 5434474 (1995-07-01), Ukita et al.
patent: 5498933 (1996-03-01), Nakamura
patent: 5608294 (1997-03-01), Derra et al.
patent: 6815910 (2004-11-01), Suzuki et al.
patent: 10-501919 (1998-02-01), None

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