Current driver for an array of LED diodes
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United States of America Patent
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-
Jul 7, 2015
Grant Date -
Jul 17, 2014
app pub date -
Jan 14, 2014
filing date -
Jan 17, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An array of LED diodes includes N channels each having LEDs coupled in series with a switch. A current driver for the array includes a processing circuit configured to detect N currents flowing respectively through the N channels of the array. The detected currents are converted by a single analog to digital converter, one at a time, into a digital word. The circuit further includes N comparator devices configured to control the N switches as result of a comparison between the digital words and respective target digital words. A memory is provided for storing the digital words received from the analog to digital converter.
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