High efficiency dimmable cold cathode fluorescent lamp ballast

Details High efficiency dimmable cold cathode fluorescent lamp ballast High efficiency dimmable cold cathode fluorescent lamp ballast

1997-09-18

2000-01-04

Philogene, Haissa

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Inductance in the condenser circuit

315209R, 315276, 363 20, 363 98, H05B 3700

Patent

active

06011360&

ABSTRACT:
A ballast including an inverter and a circuit having a resonant frequency coupled to the output of the inverter. In one embodiment of the invention, the only discrete type of element substantially affecting the resonant frequency is substantially inductive in electrical character. In this embodiment of the invention, there is also no discrete ballasting element in series with the lamp load. The reduction in discrete elements reduces both power consumption and costs associated with the ballast.

REFERENCES:
patent: 4639844 (1987-01-01), Gallios et al.
patent: 4700113 (1987-10-01), Stupp et al.
patent: 4952849 (1990-08-01), Fellows et al.
patent: 5214356 (1993-05-01), Nilssen
patent: 5424614 (1995-06-01), Maheshwari
patent: 5495405 (1996-02-01), Fujimura et al.
patent: 5559395 (1996-09-01), Venkitasubrahmanian et al.
patent: 5680017 (1997-10-01), Veldman et al.

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