Solid-state lighting apparatus and methods using current diversion controlled by lighting device bias states

  • US 9,277,605 B2
  • Filed: 09/16/2011
  • Issued: 03/01/2016
  • Est. Priority Date: 09/16/2011
  • Status: Active Grant
First Claim
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1. A lighting apparatus comprising:

  • a string of light emitting diode (LED) sets coupled in series, each set comprising at least one LED;

    a resistor coupled in series with the string; and

    a plurality of current diversion circuits, respective ones of which are coupled to respective nodes of the string and to a terminal of the resistor and configured to operate responsive to bias state transitions of respective ones of the LED sets, wherein a first one of current diversion circuits is configured to conduct current to a first one of the LED sets while bypassing a second one of the LED sets and to be turned off responsive to a voltage at the terminal of the resistor.

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