Illumination device

Details Illumination device Illumination device

2008-01-29

2008-01-29

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Plural load device regulation

C315S360000, C315S291000, C315S297000, C315S312000, C315S084000, C340S815450, C340S870030, C340S538120, C362S466000

Reexamination Certificate

active

07323831

ABSTRACT:
An illumination device has an illumination unit which glows when current flows through a load thereof, at least one instruction unit for instructing the illumination unit to glow, a PWM signal generating unit which generates a plurality of PWM signals based on that the instruction unit instructed the illumination unit to glow, and a time difference setting unit for setting a time difference between one of the plurality of PWM signals and an other thereof based on that the instruction unit instructed the illumination unit to glow. The load of the illumination unit is divided into a plurality of portions which are respectively connected with each other in parallel and connected with the PWM signal generating unit. The plurality of PWM signals are generated for currents flowing through the plurality of divided portions of the load of the illumination unit.

REFERENCES:
patent: 5604407 (1997-02-01), Andres et al.
patent: 6166496 (2000-12-01), Lys et al.
patent: 6717376 (2004-04-01), Lys et al.
patent: 2005/0063194 (2005-03-01), Lys et al.

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