Electric discharge lamp device

Details Electric discharge lamp device Electric discharge lamp device

2005-02-08

2005-02-08

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S308000

Reexamination Certificate

active

06853155

ABSTRACT:
An electric discharge lamp device has a lighting start voltage storage circuit for storing a lamp voltage immediately after the start of lighting of a lamp, and a change detection circuit for detecting a change in the lamp voltage by subtracting the lamp voltage immediately after the start of lighting of the lamp from the lamp voltage detected currently. The electric power supplied to the lamp is controlled based upon the change in the lamp voltage.

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patent: 9-180888 (1997-07-01), None
patent: 2000-82593 (2000-03-01), None

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