Dimmable discharge lamp lighting device

Details Dimmable discharge lamp lighting device Dimmable discharge lamp lighting device

2006-10-03

2006-10-03

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S2090SC

Reexamination Certificate

active

07116063

ABSTRACT:
A discharge lamp lighting device includes a high frequency power supply for supplying high frequency power to the discharge lamp via a first impedance element, a DC power supply for applying DC voltage to the discharge lamp via a second impedance element, a dimming control circuit for carrying out a dimming of the discharge lamp by controlling the power supplied to the discharge lamp, a DC voltage detection circuit for detecting a DC component of the voltage applied to the discharge lamp, and an output correction unit for making a correction to the power supplied to the discharge lamp in accordance with a value detected by the DC voltage detection circuit. It can light the discharge lamp stably regardless of a variation in temperature.

REFERENCES:
patent: 5925990 (1999-07-01), Crouse et al.
patent: 6696798 (2004-02-01), Nishimoto et al.
patent: 2002/0047604 (2002-04-01), Schadhauser et al.
patent: 2002/0047608 (2002-04-01), Takahashi et al.

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