Gas discharge lamps and systems

Details Gas discharge lamps and systems Gas discharge lamps and systems

1996-09-10

1998-05-05

Pascal, Robert

Electric lamp and discharge devices: systems

Current and/or voltage regulation

315330, 315 60, 315DIG1, 315DIG4, 313607, 313594, G05F 100

Patent

active

057479461

ABSTRACT:
A fluorescent discharge lamp has two glow mode electrodes wound around it in a helical fashion. One circuit drives the main electrodes at opposite ends of the lamp at high levels of brightness. Another circuit drives the glow mode electrodes at low levels of brightness, at about 10MHz. At intermediate levels of brightness, both the main electrodes and the glow mode electrodes are driven, the two sets of electrodes being driven for alternate on and off periods with the glow mode electrodes being on when the main electrodes are off and the glow mode electrodes being off when the main electrodes are on.

REFERENCES:
patent: 2003898 (1935-06-01), Mitscherling
patent: 3890540 (1975-06-01), Ott
patent: 5030894 (1991-07-01), Yoshiite et al.
patent: 5420481 (1995-05-01), McCanney
patent: 5432398 (1995-07-01), Kogelschatz

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