Discharge lamp lighting apparatus and projector

Details Discharge lamp lighting apparatus and projector Discharge lamp lighting apparatus and projector

2007-11-14

2010-12-07

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S2090SC, C315S360000

Reexamination Certificate

active

07847492

ABSTRACT:
In a discharge lamp lighting apparatus, increase modulation on lamp current with a pulse is carried out according to a modulation signal. At a start-up of the discharge lamp or immediately thereafter, the increase modulation is restrained, and in a lighting steady state of the discharge lamp, the restraining of the increase modulation is released, and wherein when the restraining of the increase modulation is released, in a transition period from immediately after the start-up of the discharge lamp to the lighting steady state, the restraining of increase modulation is gradually released.

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patent: WO-02/063391 (2002-08-01), None

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