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Illumination device including a color selecting panel for recycling unwanted light

  • US 7,845,822 B2
  • Filed: 12/29/2006
  • Issued: 12/07/2010
  • Est. Priority Date: 12/29/2006
  • Status: Active Grant
First Claim
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1. An illumination device comprising:

  • At least one light emitting diode that produces light having a first range of wavelengths;

    at least one wavelength converting element converting at least a portion of the light having the first range of wavelengths to light having a second range of wavelengths; and

    a color selecting panel that selects a portion of the first and/or the second range of wavelength as an illumination light and selects a portion from the first and/or second range of wavelengths as a recycled light, wherein the selection of the illumination light and the recycled light is in at least one of the spatial domain of the panel and the temporal domain of at least two selections.

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