Power feeding apparatus for discharge lamp

Details Power feeding apparatus for discharge lamp Power feeding apparatus for discharge lamp

2005-01-04

2005-01-04

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S291000, C315S307000, C315S360000

Reexamination Certificate

active

06838838

ABSTRACT:
In a power feeding apparatus, current flowing through the discharge lamp is controlled not to exceed a current limit value. Until the discharge status changes to the arc discharge, the current limit value is a first current limit value, and after that, the current limit value changes to the second current limit value. The first current limit value is 70% of the second current limit value or less, and further, for 0.2 ms or greater, the first current limit value is maintained after the discharge status changes to the arc discharge.

REFERENCES:
patent: 4382210 (1983-05-01), Buhrer
patent: 4749913 (1988-06-01), Stuermer et al.
patent: 5434474 (1995-07-01), Ukita et al.
patent: 5463287 (1995-10-01), Kurihara et al.
patent: 6075326 (2000-06-01), Nostwick
patent: 6376998 (2002-04-01), Okamoto et al.
patent: 6605906 (2003-08-01), Okamoto et al.
patent: 20020167284 (2002-11-01), Okamoto et al.

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