Method and device for driving a metal halide lamp

Details Method and device for driving a metal halide lamp Method and device for driving a metal halide lamp

2003-04-22

2008-10-07

Dinh, Trinh V (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S2090SC, C315S226000

Reexamination Certificate

active

07432665

ABSTRACT:
A method for driving a lamp is described includes generating a light controlling DC electric field E with a desired direction and a desired strength inside the lamp such as to obtain a desirable ion distribution inside the lamp. The lamp is supplied with a commutating current with a DC component, having a constant current intensity and a duty cycle differing from 50%. By setting the duty cycle, it is possible to set a certain average value of the lamp current, allowing the efficacy and/or color temperature of the lamp to be influenced.

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