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Method and system for driving light emitting elements

  • US 8,907,591 B2
  • Filed: 04/30/2013
  • Issued: 12/09/2014
  • Est. Priority Date: 01/04/2010
  • Status: Active Grant
First Claim
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1. A method of driving a plurality of strings of light-emitting elements, the method comprising:

  • providing a fixed voltage reference to a plurality of parallel-connected current sources, each of the current sources being connected in series with a string;

    supplying current from each current source to the string to which it is connected, whereby the fixed voltage reference is independent of the current supplied to each string; and

    taking up excess voltage not required by any one of the strings of light-emitting elements.

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