Self-ballasted screw-in fluorescent lamp

Details Self-ballasted screw-in fluorescent lamp Self-ballasted screw-in fluorescent lamp

1992-10-01

1993-08-03

Mis, David

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Discharge device load

315326, 315DIG5, H05B 4129

Patent

active

052332705

ABSTRACT:
A compact screw-in fluorescent lamp is mounted on an ordinary Edison-type screw-base. An inverter-type ballast is integrally included with the base, thereby making the fluorescent lamp capable of being screwed into an ordinary lamp socket and to be powered therefrom by ordinary power line voltage. The fluorescent lamp is folded and has a narrowed section of glass. The inverter-type ballast, which includes a half-bridge self-oscillating inverter, is powered via a voltage doubler and powers the fluorescent lamp via an tuned L-C circuit. Light output can be adjusted by way of an adjustment means functional to adjust the inverter frequency, thereby correspondingly to adjust the magnitude of the lamp current.

REFERENCES:
patent: 4237403 (1980-12-01), Davis
patent: 4270071 (1981-05-01), Morton
patent: 4298822 (1981-11-01), Fukuda
patent: 4383200 (1983-05-01), Van Zon et al.
patent: 4426602 (1984-01-01), Mollet et al.
patent: 4677345 (1987-06-01), Nilssen
patent: 4857806 (1989-08-01), Nilssen
patent: 5047690 (1991-09-01), Nilssen
patent: 5164637 (1992-11-01), Nilssen
patent: 5166578 (1992-11-01), Nilssen

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