US Patent 7642734 Method and system for dimming light sources
Patent 7642734 was granted and assigned to Osram on January, 2010 by the United States Patent and Trademark Office.
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Patent abstract
Dimming a light source such as a LED over a dimming range (0%-100%) involves adjusting at least one of the intensity (I) and the duty-cycle (DR) of a current flowing through the light source. The dimming range includes at least one portion (L%-H%; 0%-H%) where the light source is fed with a current whose intensity (I) is switched with a given duty cycle (DR) between a non-zero on value and zero, the non-zero on value being a fraction of the rated value (Irated), whereby joint CC and PWM dimming is achieved.
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Patent Inventor Names
Paolo De Anna0
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US Patent 07642734 Method and system for dimming light sources US Patent 7642734 Method and system for dimming light sources
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Patent Number
076427340
Patent Number
76427340
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Current Assignee
Patent Jurisdiction
Patent Number
076427340
Date of Patent
January 5, 2010
0Patent Application Number
113394920
Date Filed
January 26, 2006
0Official Website
Patent Primary Examiner
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US Patent 07642734 Method and system for dimming light sources
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Is a
Current assignee
Patent jurisdiction
Patent number
07642734
Date of patent
January 5, 2010
Patent application number
11339492
Date Filed
January 26, 2006
Patent primary examiner
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