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WHITE LED DEVICE

  • US 20110103038A1
  • Filed: 04/06/2010
  • Published: 05/05/2011
  • Est. Priority Date: 10/30/2009
  • Status: Abandoned Application
First Claim
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1. An improved white LED device comprising:

  • at least one first LED component, emitting a blue light having a peak wavelength ranging between 440-470 nm;

    at least one second LED component, emitting a red light with the peak wavelength ranging between 600 and 630 nm, andat least one translucent member, containing at least one fluorescent substance scattered throughout the translucent member, wherein an absorption spectrum of the fluorescent substance is consistent with the emission spectrum of the blue light from the first LED component, so that the fluorescent substance is able to absorb some of the blue light, and emitting a yellow green light with the peak wavelength ranging between 500 and 570 nm, and a CIE 1931 chromaticity diagram of mixing the blue light and the yellow green light representing a polygon with color coordinates (0.20, 0.50), (0.20, 0.30), (0.29, 0.30), and (0.40, 0.50), furthermore, blending the red light, the blue light, and the yellow green light, the improved white LED device emitting a white light with high color rendering, a color temperature of the white light ranging between 2500 and 7000 K.

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