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Optical and Quantum Electronics

, Volume 44, Issue 3–5, pp 111–117 | Cite as

The phosphor’s optical properties—chromaticity coordinate relationship of phosphor converted white LEDs

  • C. Sommer
  • P. Hartmann
  • P. Pachler
  • H. Hoschopf
  • F. P. Wenzl
Article

Abstract

Based on optical ray-tracing simulations we discuss the effect of the extinction coefficient and the quantum efficiency of the phosphors on the angular homogeneity of the white light emitted from phosphor converted light-emitting diodes. In particular variations of the extinction coefficient are prone to affect diverse CIE chromaticity coordinates for different viewing angles. Contrarily, the impact of the quantum efficiency on angle dependent variations of the chromaticity coordinates turns out to be of minor importance.

Keywords

Solid state lighting Optical simulation Ray tracing Colour conversion White LEDs 

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References

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Copyright information

© Springer Science+Business Media, LLC. 2011

Authors and Affiliations

  • C. Sommer
    • 1
  • P. Hartmann
    • 1
  • P. Pachler
    • 2
  • H. Hoschopf
    • 2
  • F. P. Wenzl
    • 1
  1. 1.Institute of Surface Technologies and PhotonicsJoanneum Research Forschungsgesellschaft mbHWeizAustria
  2. 2.Tridonic Jennersdorf GmbHJennersdorfAustria

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