Lighting method of ultra-high pressure mercury lamp

Details Lighting method of ultra-high pressure mercury lamp Lighting method of ultra-high pressure mercury lamp

2006-05-16

2006-05-16

Philogene, Haissa (Department: 2828)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S360000, C315S289000, C315S307000, C315S2090SC, C315SDIG002, C315SDIG002

Reexamination Certificate

active

07045972

ABSTRACT:
A lighting device for an ac-lighting type ultra-high pressure mercury lamp includes: a stepdown chopper for converting dc voltage that is supplied from the outside to voltage of a prescribed level; a full-bridge switch circuit for generating either dc or ac voltage from the output voltage of the stepdown chopper and supplying the generated voltage to the ultra-high pressure mercury lamp; and a control circuit for controlling the full-bridge switch circuit such that, when extinguishing the lamp, a dc voltage is supplied over a prescribed time interval with a prescribed electrode of the ultra-high pressure mercury lamp as the anode.

REFERENCES:
patent: 5051665 (1991-09-01), Garrison et al.
patent: 6597118 (2003-07-01), Arimoto et al.
patent: 6888321 (2005-05-01), Arimoto et al.
patent: 06-076967 (1994-03-01), None
patent: 08-130096 (1996-05-01), None
patent: 2001-273984 (2001-10-01), None
patent: 2002-289379 (2002-10-01), None

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