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High efficiency LEDS and LED lamps

  • US 8,338,849 B2
  • Filed: 06/14/2012
  • Issued: 12/25/2012
  • Est. Priority Date: 06/27/2009
  • Status: Active Grant
First Claim
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1. A lighting system comprising:

  • an electrically insulating carrier having a plurality of conductive elements disposed thereon;

    disposed over the carrier, a light-emitting array comprising a plurality of light-emitting strings, each light-emitting string comprising a plurality of unpackaged light-emitting diode (LED) dies electrically connected in series, each LED die having at least two electrical contacts on one surface thereof, wherein each electrical contact is electrically connected to a conductive element by a conductive adhesive; and

    at least one power source for providing power to the light-emitting strings.

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