Fluorescent lamp system

Details Fluorescent lamp system Fluorescent lamp system

1990-03-27

1991-09-24

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

With power factor control device

315209R, 315219, 315223, 315DIG7, H05B 4114

Patent

active

050516620

ABSTRACT:
A fluorescent lamp system utilizes boost power factor correction. The fluorescent lamp system includes a power source, a reference voltage and a fluorescent lamp. A resonant circuit supplies power to the fluorescent lamp. A first capacitor is connected between a first end of the resonant circuit and the reference voltage. A second capacitor is connected between the first end of the resonant circuit and the power source. A first switch is connected between a second end of the resonant circuit and the reference voltage. A second switch is connected between the second end of the resonant circuit and the power source. A control module operates the first switch and the second switch so that the resonant circuit operates at near resonant frequency. The control module is integrated on a single integrated circuit. The first switch and the second switch may be also integrated on the single integrated circuit. Alternately, only one of the switches, or neither of the switches may be integrated on the single integrated circuit.

REFERENCES:
patent: 4259614 (1981-03-01), Kohler
patent: 4277728 (1981-07-01), Stevens
patent: 4370600 (1983-01-01), Zansky
patent: 4506195 (1985-03-01), Elms
patent: 4652797 (1987-03-01), Nilssen
patent: 4874989 (1989-10-01), Nilssen

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