METHOD TO SUPPLY POWER TO AN LED ARRAY AS WELL AS THE CIRCUIT ARRANGEMENT FOR IMPLEMENTING THE METHOD
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United States of America Patent
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Issued Date -
Dec 20, 2012
app pub date -
Mar 1, 2010
filing date -
Mar 1, 2010
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a method to supply power to an LED array, comprising at least two LED branches connected in parallel, in each of which at least one LED is arranged. The LED array is supplied with predetermined power from a current source connected in series, wherein currents are measured in the LED branches, wherein the measured currents are compared in control electronics, and wherein the currents are controlled in a part of the LED branches such that they have a defined ratio with respect to one another in the LED branches. The method is intended to be improved such that it can be carried out economically and with simple means. This is achieved in that one of the LED branches is selected to be the master whose current is utilized as the target specification for the remaining LED branches.
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