×

Circadian friendly LED light source

  • US 9,410,664 B2
  • Filed: 06/26/2014
  • Issued: 08/09/2016
  • Est. Priority Date: 08/29/2013
  • Status: Active Grant
First Claim
Patent Images

1. A light source comprising:

  • at least one first light emitting diode (LED) emission source characterized by a first emission; and

    at least one second LED emission source characterized by a second emission, whereinthe first emission and the second emission are configured to provide a first combined emission and a second combined emission;

    the first combined emission is characterized by a first spectral power distribution (SPD) from 350 to 850 nm and fractions Fv1 and Fc1;

    the second combined emission is characterized by a second SPD from 350 to 850 nm and fractions Fv2 and Fc2;

    Fv1 represents the fraction of power of the first SPD in the wavelength range from 400 nm to 440 nm;

    Fc1 represents the fraction of power of the first SPD in the wavelength range from 440 nm to 500 nm;

    Fv2 represents the fraction of power of the second SPD in the wavelength range from 400 nm to 440 nm;

    Fc2 represents the fraction of power of the second SPD in the wavelength range from 440 nm to 500 nm;

    the first SPD and the second SPD have a color rendering index above 80;

    Fv1 is at least 0.05;

    Fc2 is at least 0.1; and

    Fc1 is less than Fc2 by at least 0.02.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×