Ignition scheme for a high intensity discharge ballast

Details Ignition scheme for a high intensity discharge ballast Ignition scheme for a high intensity discharge ballast

1992-10-29

1994-06-07

Pascal, Robert J.

Electric lamp and discharge devices: systems

Surge generator or inductance in the supply circuit

315224, 315307, 315DIG7, 315290, 315291, H05B 3700

Patent

active

053192869

ABSTRACT:
An ignition scheme for a high intensity discharge ballast. The ballast includes a down converter for producing a varying level of current during the glow stage of the lamp. The level of current available at the time of lamp ignition is equal to or greater than any other level of current produced during at least takeover of the lamp. The need for building up the level of current during at least takeover is eliminated thereby minimizing the need for re-ignition of the lamp.

REFERENCES:
patent: 3890537 (1975-06-01), Park et al.
patent: 4066931 (1978-01-01), Morrill
patent: 4382210 (1983-05-01), Buhrer
patent: 4399392 (1983-08-01), Buhrer
patent: 4959593 (1990-09-01), Joanino
patent: 4994716 (1991-02-01), Ganser et al.
patent: 5083065 (1992-01-01), Sakata et al.

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