Method and apparatus for driving a gas discharge lamp

Details Method and apparatus for driving a gas discharge lamp Method and apparatus for driving a gas discharge lamp

2007-01-16

2007-01-16

Wong, Don (Department: 2163)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S2090SC, C363S095000

Reexamination Certificate

active

10491865

ABSTRACT:
A method for driving a gas discharge lamp (1) is described, wherein electric first DC power is provided at a relatively high voltage and a relatively low current. Said first power is converted down to second DC power at a relatively low voltage and a relatively high current. Said second power is fed to a gas discharge lamp, preferably via a commutator. The conversion of said first power to said second power is performed in at least two steps, a first one of such steps including the step of converting down said first power to an intermediate DC power at an intermediate DC voltage lower (VM) than said first DC voltage but higher than said second DC voltage. A downconverter device (30) for use in a driving apparatus (10) for a gas discharge lamp (1) is described. The downconverter device comprises at least two downconverter units (31, 32) connected in series, for converting down said intermediate DC power to said second power.

REFERENCES:
patent: 5491388 (1996-02-01), Nobuyuki et al.
patent: 6144171 (2000-11-01), Clements et al.
patent: 6373199 (2002-04-01), Erhardt et al.
patent: 6388397 (2002-05-01), Iwahori
patent: 6476568 (2002-11-01), Urakabe et al.
patent: 2002/0057062 (2002-05-01), Hiroyasu et al.
patent: WO 01 67828 (2001-09-01), None

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