Fluorescent lamp supply circuit

Details Fluorescent lamp supply circuit Fluorescent lamp supply circuit

1991-03-26

1993-08-10

Pascal, Robert J.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

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

315307, 315224, 315DIG2, 315DIG4, 315DIG5, 315DIG7, G05F 100, H05B 3702

Patent

active

052352544

ABSTRACT:
A power circuit for a fluorescent discharge lamp comprising a converter for producing a DC output. A voltage controlled oscillator is driven by the output from the converter, the oscillator providing a high voltage output for driving the lamp. The frequency of the output increases and decreases with increases and decreases in the powering voltage from the converter. A current detector detects the current passing through the lamp and controls the output voltage of the converter according to that current to increase the the voltage to strike the lamp and then control the voltage to give the required running current.

REFERENCES:
patent: 3611021 (1971-10-01), Wallace
patent: 3710177 (1973-01-01), Ward
patent: 4415839 (1983-11-01), Lesea
patent: 4700113 (1987-10-01), Stupp et al.
patent: 4723098 (1988-02-01), Grubbs
patent: 4791338 (1988-12-01), Dean et al.
patent: 4904905 (1990-02-01), Olon
patent: 4949016 (1990-08-01), De Bijl et al.
patent: 4954754 (1990-09-01), Nilssen
patent: 5055993 (1991-10-01), Miyata et al.

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