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Illumination device with multi-color light-emitting elements

  • US 10,222,008 B2
  • Filed: 06/16/2017
  • Issued: 03/05/2019
  • Est. Priority Date: 03/07/2013
  • Status: Active Grant
First Claim
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1. An illumination device for generating output light, comprising:

  • a substrate;

    a plurality of light sources disposed on the substrate, each of the light sources comprisinga light-emitting diode (LED), anda corresponding inelastic scattering element arranged to receive pump light from the LED to which it corresponds to generate corresponding converted light, the inelastic scattering element being spaced apart from the LED to which it corresponds and coupled to the substrate to form an enclosure for the LED, the inelastic scattering element having an inner surface facing the LED to which it corresponds,wherein converted light from different inelastic scattering elements has different spectral density distributions and the pump light of different LEDs has different spectral density distributions; and

    an elastic scattering element arranged to receive the converted light from the inelastic scattering elements of the plurality of light sources, the elastic scattering element configured to elastically scatter the converted light into output light, wherein the elastic scattering element is spaced apart from the plurality of light sources and coupled to the substrate to form an enclosure for the plurality of light sources, the elastic scattering element havingan input surface facing the plurality of light sources, andan output surface opposing the input surface.

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