Method for driving of a fluorescent lighting and a ballast...

Details Method for driving of a fluorescent lighting and a ballast... Method for driving of a fluorescent lighting and a ballast...

2005-06-10

2010-12-21

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

Reexamination Certificate

active

07855519

ABSTRACT:
A method of driving a fluorescent light, having: (a) receiving and full-wave rectifying commercial AC power; (b) dividing phases of the AC power full-wave rectified at step (a) depending on voltage magnitude, and performing switching control such that low-voltage portions of the divided voltages, having low phases, are used as heating power for heating filaments of a fluorescent tube, and high-voltage portions of the divided voltages, having high phases, are used as discharge voltage of the fluorescent tube; (c) switching on the low-voltage portions having low phases as the heating power for heating the filaments of the fluorescent tube in response to a signal output at step (b); and (d) switching on the high-voltage portions having high phases as the lighting power of the fluorescent tube in response to the signal output at step (b).

REFERENCES:
patent: 3821509 (1974-06-01), Amagami et al.
patent: 5416387 (1995-05-01), Cuk et al.
patent: 5500576 (1996-03-01), Russell et al.
patent: 5841241 (1998-11-01), Nilssen
patent: 6285138 (2001-09-01), Kataoka et al.
patent: 7592753 (2009-09-01), Baarman et al.
patent: 2004/0125071 (2004-07-01), Kim et al.

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