Device for operation of a discharge lamp of the short arc type

Details Device for operation of a discharge lamp of the short arc type Device for operation of a discharge lamp of the short arc type

2008-06-03

2008-06-03

Vo, Tuyet (Department: 2821)

Electric lamp and discharge devices

With gas or vapor

Having a particular total or partial pressure

C313S574000, C313S623000, C313S624000, C313S600000, C315S224000, C315S225000, C315S291000, C315S307000

Reexamination Certificate

active

07382093

ABSTRACT:
A device for operating a discharge lamp of the short arc type having a feed device which supplies a direct current to the discharge lamp when operation starts and an alternating current afterwards, in which the feed device supplies a direct current which is smaller than the rated current to the discharge lamp at the start of operation, and a direct current which is at least as large as the rated current, afterwards. A control which ascertains whether the discharge lamp at the start of operation is in a hot or cold start operating state, and which establishes one of the following parameters based on whether the hot or cold operating state ascertained to exist:the value of the direct current which is at least as great as the rated current;the feed duration of the direct current which is at least as great as the rated current.

REFERENCES:
patent: 5109181 (1992-04-01), Fischer et al.
patent: 5497049 (1996-03-01), Fischer
patent: 6271628 (2001-08-01), Sugitani et al.
patent: 6294879 (2001-09-01), Nagase et al.
patent: 2002/0135324 (2002-09-01), Fujii et al.
patent: 2004/0150343 (2004-08-01), Takahashi et al.
patent: 2004/0160189 (2004-08-01), Fukushima
patent: 1 408 723 (2004-04-01), None
patent: 1 494 264 (2005-01-01), None

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