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Systems and methods for controlling the spectral content of LED lighting devices

  • US 9,844,116 B2
  • Filed: 11/30/2016
  • Issued: 12/12/2017
  • Est. Priority Date: 09/15/2015
  • Status: Active Grant
First Claim
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1. A method for generating illumination from a light source and tuning the spectral output of the light source comprising the steps of:

  • providing a light engine comprising at least;

    one LED of a first color, one LED of a second color, one LED of a third color and one LED of a fourth color and wherein the light engine also comprises electrical circuitry for selectively driving LEDs constituent of said light engine;

    electrically driving said light engine to produce a first illumination;

    providing a target color point illumination for the light engine;

    measuring the color of said first illumination and comparing it to said target color point; and

    adjusting the illumination output of at least one of the first color LED, the second color LED, the third color LED and the fourth color LED by selectively adding a phosphor or other lumiphoric material to the LED such that the color of the resulting illumination output of the light engine matches said target color point illumination.

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