Lighting device for electric discharge lamp

Details Lighting device for electric discharge lamp Lighting device for electric discharge lamp

1990-10-19

1992-01-21

Mis, David

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315 82, 315209R, 315DIG7, H05B 4136

Patent

active

050830651

ABSTRACT:
A lighting device for an electric discharge lamp comprises an LC series resonant circuit, and control means for controlling an inverter circuit. Immediately after the occurrence of a dielectric breakdown in the electric discharge lamp. AC voltage with a relatively low frequency is applied to the lamp so as to pass a heavy current therethrough. Subsequently, the frequency is increased stepwise by a relatively small variation until a terminal voltage of the electric discharge lamp reaches a predetermined value. Thereafter, the frequency is increased stepwise by a relatiely large variation until the electric discharge lamp assumes a discharge stable state.

REFERENCES:
patent: 4412154 (1983-10-01), Klein
patent: 4611150 (1986-09-01), Ball et al.
patent: 4698554 (1987-10-01), Stupp et al.
patent: 4904905 (1990-02-01), Olon
patent: 4928038 (1990-05-01), Nerone

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