Fluorescent lamp electronic ballast control circuit

Details Fluorescent lamp electronic ballast control circuit Fluorescent lamp electronic ballast control circuit

1996-02-29

1999-12-28

Kinkead, Arnold

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

Delayed application of the discharge potential

315360, 315107, 315205, H05B 4118, H05B 4100

Patent

active

060085878

ABSTRACT:
An electronic ballast control apparatus and method for fluorescent lamps includes applying a heating current through the filaments of the lamp, and delaying the application of arc current through the filaments and the gas for a predetermined time. This allows the filaments to heat up to a level capable of sustaining thermionic emission, thereby eliminating sputtering damage upon the application of the arc current.

REFERENCES:
patent: 4215292 (1980-07-01), Inui et al.
patent: 4253043 (1981-02-01), Chermin et al.
patent: 4746841 (1988-05-01), Ogawa
patent: 4949015 (1990-08-01), Nilssen
patent: 4988920 (1991-01-01), Hoeksma
patent: 5444333 (1995-08-01), Lau
patent: 5483125 (1996-01-01), Kachmarik et al.
patent: 5583399 (1996-12-01), Rudolph

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