Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Silicon controlled rectifier ignition
Reexamination Certificate
2005-12-06
2005-12-06
Vo, Tuyet Thi (Department: 2821)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Silicon controlled rectifier ignition
C315S2090CD, C315S2090SC, C361S264000, C361S247000
Reexamination Certificate
active
06972529
ABSTRACT:
A switch mode power supply for igniting and operating a high-pressure gas discharge lamp includes an ignition sub-circuit which is coupled via a transformer to the circuit. The ignition sub-circuit has at least an ignition capacitor, and a switching element for discharging the capacitor at a desired moment in time having a control electrode. The control electrode of the switching element is connected to the commutator of the lamp circuit via a control sub-circuit having substantially passive elements.
REFERENCES:
patent: 4447759 (1984-05-01), Moerkens et al.
patent: 6204611 (2001-03-01), Bouwman et al.
patent: 6242867 (2001-06-01), Pogadaev et al.
patent: 06 349586 (1994-12-01), None
patent: 06 310287 (1995-03-01), None
patent: WO 01/6998 (2001-09-01), None
Deurloo Oscar Jan
Krijzer Markus
Van Casteren Dolf Henricus Jozef
Koninklijke Philips Electronics , N.V.
Liberchuk Larry
Vo Tuyet Thi
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