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LED-based light sources for light emitting devices and lighting arrangements with photoluminescence wavelength conversion

  • US 10,204,888 B2
  • Filed: 12/12/2016
  • Issued: 02/12/2019
  • Est. Priority Date: 04/13/2011
  • Status: Active Grant
First Claim
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1. A lighting arrangement comprising:

  • a first excitation source that generates excitation light having a first dominant wavelength in a range 450 nm to 480 nm;

    a second excitation source that generates excitation light having a second dominant wavelength in a range 450 nm to 480 nm, wherein the first dominant wavelength is different from the second dominant wavelength by at least 2.5 nm; and

    a photoluminescence material that converts at least a portion of the excitation light to light of a different wavelength;

    wherein the emission product of the arrangement comprises a combination of the excitation light generated by the first and second excitation sources and light generated by the at least one photoluminescence material.

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