Power network fluorescent lamp operating circuit

Details Power network fluorescent lamp operating circuit Power network fluorescent lamp operating circuit

1987-05-08

1988-10-04

Moore, David K.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

315244, 315290, 315292, 315226, 315DIG7, H05B 3700

Patent

active

047758228

ABSTRACT:
To operate a fluorescent lamp having a lamp operating voltage of to about 0 V from a power supply having a nominal voltage level below lamp operating voltage, and without use of a voltage doubler circuit or a transformer to increase the power supply voltage, the power supply voltage is rectified, chopped, and then applied to the fluorescent lamp through a voltage increasing circuit which is formed as an LC resonance circuit. The inductive component can be formed by the current limiting choke, already present in a typical fluorescent lamp circuit, and the capacitative component by a small capacitor, for example of 6 nF value, connected to the choke to form a series resonance circuit.

REFERENCES:
patent: 4042856 (1977-08-01), Steigerwald
patent: 4358712 (1982-11-01), Filgas et al.
patent: 4362971 (1982-12-01), Sloan
patent: 4398126 (1983-08-01), Zuchtriegel
patent: 4398128 (1983-08-01), Wollank
patent: 4438372 (1984-03-01), Zuchtriegel
patent: 4547706 (1985-10-01), Krummel
patent: 4553070 (1985-11-01), Sairanen et al.
patent: 4572989 (1986-02-01), Zuchtriegel
patent: 4608523 (1986-08-01), Nilssen
patent: 4647817 (1987-03-01), Fahnrich et al.

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