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Tunable LED lamp for producing biologically-adjusted light

  • US 8,686,641 B2
  • Filed: 12/05/2011
  • Issued: 04/01/2014
  • Est. Priority Date: 12/05/2011
  • Status: Active Grant
First Claim
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1. A tunable LED lamp for producing a biologically-adjusted light output with a color rendering index above 70, comprising:

  • a base;

    a housing attached to the base;

    a power circuit disposed within the housing and having electrical leads attached to the base;

    a drive circuit disposed within the housing and electrically coupled to the power circuit;

    a heat sink disposed about the housing;

    a plurality of LED dies mounted on a support coupled to the housing, wherein each of the plurality of LED dies is electrically coupled to and driven by the drive circuit, and wherein the plurality of LED dies includes a ratio oftwo red-orange LED dies tothree cyan LED dies tothree mint LED dies tothree blue LED dies; and

    an output-select controller electrically coupled to the drive circuit to program the drive circuit to drive the LED dies in one of a plurality of light output configurations, wherein the plurality of light output configurations includesa pre-sleep configuration,a phase-shift configuration, anda general lighting configuration.

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