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Solid state light emitting devices including adjustable melatonin suppression effects

  • US 9,039,746 B2
  • Filed: 02/08/2013
  • Issued: 05/26/2015
  • Est. Priority Date: 02/08/2013
  • Status: Active Grant
First Claim
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1. A light emitting apparatus comprising:

  • a first LED component; and

    a second LED component;

    wherein the first LED component and the second LED component are arranged to be operated in a first operating mode in which combined emissions of the first LED component and the second LED component (i) are within four MacAdam ellipses of a target correlated color temperature, and (ii) embody a first melatonin suppression milliwatt per hundred lumens value;

    wherein the first LED component and the second LED component are arranged to be operated in a second operating mode in which combined emissions of the first LED component and the second LED component (i) are within four MacAdam ellipses of the target correlated color temperature, and (ii) embody a second melatonin suppression milliwatt per hundred lumens value that is at least about 10 percent greater than the first melatonin suppression milliwatt per hundred lumens value; and

    wherein the light emitting apparatus comprises at least one of the following features (a) and (b);

    (a) at least one of the first LED component and the second LED component comprises at least one LED arranged to stimulate emissions of at least one lumiphoric material; and

    (b) combined emissions of the first LED component and the second LED component, when operated in the first operating mode, embody a color rendering index (CRI) value of at least about 80.

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