Fluorescent lamp filament drive technique

Details Fluorescent lamp filament drive technique Fluorescent lamp filament drive technique

1996-09-26

1998-08-25

Pascal, Robert J.

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

Automatic cut-out or voltage regulator in the cathode or...

315102, 315106, H05B 3702

Patent

active

057986142

ABSTRACT:
A method and apparatus for driving a fluorescent lamp is described wherein the fluorescent lamp is operated in the phanotronic, or hot-cathode, mode. The filament preheat current is decoupled from the arc current through synchronization of the filament voltage and arc voltage waveforms to provide sense windows during which the filament condition may be precisely and accurately determined. Sensing circuits provide correctional feedback to the filament voltage signal to provide optimal filament heating.

REFERENCES:
patent: 4920299 (1990-04-01), Presz et al.

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