Circuit arrangement with continuously oscillating modulated...

Details Circuit arrangement with continuously oscillating modulated... Circuit arrangement with continuously oscillating modulated...

2006-11-30

2010-11-23

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S2090SC, C315S194000, C315S246000, C315S291000

Reexamination Certificate

active

07839093

ABSTRACT:
Disclosed is a circuit arrangement for supplying a lamp wattage to a high-pressure discharge lamp (Lp) in the form of an alternating current having an operating frequency. The alternating current is generated by a full bridge that is composed of two half-bridge branches. The lamp wattage can be adjusted via the phase which the two half-bridge branches have relative to each other. The lamp wattage is modulated by means of the transmission function of an interface if the operating frequency is frequency-modulated. Said modulation of the lamp wattage can be compensated by adequately correcting the phase.

REFERENCES:
patent: 6803730 (2004-10-01), Nadd et al.
patent: 7034800 (2006-04-01), Nakatsuka et al.
patent: 2005/0285544 (2005-12-01), Kastle
patent: 0 744 883 (1996-11-01), None
patent: 1 501 338 (2005-01-01), None
Stormberg H-P et al: “Excitation of Acoustic Instabilities in Discharge Lamps with Pulsedsupply Voltage” Lighting Research and Technology, Illuminating Engineering Society, London, GB, vol. 15, No. 3, Mar. 1983, pp. 127-132, XP002052920 ISSN: 0024-3426 the whole document.

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