Discharge lamp driving circuit

Details Discharge lamp driving circuit Discharge lamp driving circuit

1988-10-26

1990-03-27

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Inductance in the condenser circuit

315226, 315DIG7, H05B 3700

Patent

active

049123742

ABSTRACT:
A discharge lamp driving circuit includes a chopper with a first switching circuit and an inverter with a second switching circuit. The chopper and inverter are connected to a dc voltage source and controlled to produce a composite lamp driving current composed of a high frequency alternating current interrupted by a dc current in order to keep the discharge lamp free from an acoustic resonance. The chopper and the inverter are arranged to have at least one common switching element in their first and second switching circuits.

REFERENCES:
patent: 3789266 (1974-01-01), Polman et al.
patent: 4170747 (1979-10-01), Holmes
patent: 4213103 (1980-07-01), Birt
patent: 4291254 (1981-09-01), Arlt et al.
patent: 4346332 (1982-08-01), Walden
patent: 4388563 (1983-06-01), Hyltin
patent: 4547706 (1985-10-01), Krummel
patent: 4595863 (1986-06-01), Henning
patent: 4603378 (1986-07-01), Virta
patent: 4734624 (1988-03-01), Nagase et al.

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