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LIGHT-EMITTING DEVICE WITH A TUNABLE LIGHT EMISSION SPECTRUM

  • US 20130292717A1
  • Filed: 05/04/2012
  • Published: 11/07/2013
  • Est. Priority Date: 05/04/2012
  • Status: Abandoned Application
First Claim
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1. A light emitting device with a tunable light emission spectrum, the light emitting device comprising:

  • one or more blue light emitting diodes (LED) in optical communication with n different red phosphor compositions, each of the n different red phosphor compositions including a different amount of strontium (Sr) and comprising light emission in a wavelength range from about 600 nm to about 675 nm, the one or more blue LEDs comprising light emission in a wavelength range from about 400 nm to about 475 nm,wherein an mth different red phosphor composition has a formula Ca1-x-ySrxEuyAlSiN3, with 0<

    x<

    1 and 0<

    y<

    1, and x=xm and 1≦

    m≦

    n, andwherein a light emission spectrum of the light emitting device comprises a blue spectral component from the one or more blue LEDs and a red spectral component from the n different red phosphor compositions, the red spectral component comprising n overlapping light emission profiles each having a different peak emission wavelength λ

    m.

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