Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch in the primary circuit of the supply...
Patent
1990-08-30
1992-01-28
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch in the primary circuit of the supply...
315DIG7, 315223, 315243, H05B 3702
Patent
active
050846523
ABSTRACT:
A fluorescent lamp lighting apparatus comprising a DC power source, a pair of field-effect transistors which are connected in series to each other, in which drains and sources of these transistors are connected in series to each other, whereas gates are connected to an oscillator, a pair of voltage-dividing capacitors which are connected in parallel to the DC power source, and an inverter circuit having an insulative leakage transformer whose primary coil is connected to a contact between these field-effect transistors and also to the other contact between those capacitors. One-end of filaments of a fluorescent lamp are connected to both ends of the secondary coil of the leakage transformer, whereas a startup capacitor is connected between the other ends of the filaments. By provision of a series resonant circuit composed of the secondary coil and the startup capacitor, part of the series resonant circuit is released while the fluorescent lamp is off from the lighting apparatus, thus minimizing the resonant output.
REFERENCES:
patent: 4388563 (1983-06-01), Hyltin
patent: 4503363 (1985-03-01), Nilssen
patent: 4525648 (1985-06-01), De Bijl et al.
patent: 4544863 (1985-10-01), Hashimoto
patent: 4560908 (1985-12-01), Stupp et al.
patent: 4701671 (1987-10-01), Stupp et al.
patent: 4723098 (1988-02-01), Grubbs
patent: 4935862 (1990-06-01), Herbsleb et al.
Dinh Tan
LaRoche Eugene R.
Toshiba Lighting & Technology Corporation
LandOfFree
Fluorescent lamp lighting apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluorescent lamp lighting apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluorescent lamp lighting apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1862902