Discharge lamp lighting apparatus

Details Discharge lamp lighting apparatus Discharge lamp lighting apparatus

1991-01-30

1992-07-14

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Periodic switch in the primary circuit of the supply...

315276, 315DIG7, 315254, H05B 4136, H05B 4124

Patent

active

051306107

ABSTRACT:
In a discharge lamp lighting apparatus of this invention, an AC voltage of a commercial AC power source is full-wave-rectified by a rectifier, and this full-wave-rectified AC is smoothed by a smoothing circuit connected to the rectifier. An inverter operated by a series resonance circuit constituted by a resonant choke coil and a capacitor is connected to the rectifier, and field-effect transistors are connected to this series resonance circuit. By the operation of the inverter, a high-frequency AC is induced in a output winding of a boosting transformer having an input winding connected in parallel with the capacitor of the series resonance circuit. The output winding then supplies the induced AC to discharge lamps for lighting the discharge lamps.

REFERENCES:
patent: 3818312 (1974-06-01), Luuresema et al.
patent: 4547705 (1985-10-01), Hirayama et al.

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