Lamp driver circuit using resonant circuit for starting lamp

Details Lamp driver circuit using resonant circuit for starting lamp Lamp driver circuit using resonant circuit for starting lamp

1999-05-18

2000-09-26

Wong, Don

Electric lamp and discharge devices: systems

Current and/or voltage regulation

315209R, 315308, 315224, H05B 3702

Patent

active

061246824

ABSTRACT:
A lamp driver circuit for a discharge lamp in which a high frequency is used to initiate a discharge and a lower frequency is used to sustain the discharge. A tuned circuit boosts the voltage at the starting frequency. In addition, a transformer is connected to the tuned circuit to provide a further boost to the starting voltage. The transformer core may be made of a different material from that of the inductor of the tuned circuit, and is preferably selected to saturate during starting, to enhance the voltage spikes available for starting the lamp.

REFERENCES:
patent: 4170747 (1979-10-01), Holmes
patent: 4719390 (1988-01-01), Sairanen
patent: 4725762 (1988-02-01), Jagschitz
patent: 5087859 (1992-02-01), Blankers
patent: 5434479 (1995-07-01), Ohnishi et al.
patent: 5712533 (1998-01-01), Corti
patent: 5739644 (1998-04-01), Bernitz et al.
patent: 5742132 (1998-04-01), Huber et al.
patent: 5932976 (1999-08-01), Maheshwari et al.

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