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The Effect of the Phosphor Particle Sizes on the Angular Homogeneity of Phosphor-Converted High-Power White LED Light Sources

Beteiligte Autoren der JOANNEUM RESEARCH:
Autor*innen:
Sommer, Christian; Krenn, Joachim R.; Hartmann, Paul; Pachler, Peter; Schweighart, Marko; Tasch, Stefan; Wenzl, Franz P.
Abstract:
Based on optical ray tracing, we discuss the effect of the phosphor particle sizes on the angular homogeneity of the light emitted from phosphor-converted LEDs. Since the blue LED and the yellow-converted light have rather different emission characteristics, which have to be harmonized to one another by the scattering processes within the color conversion element, the phosphor particle size turns out to be an essential parameter in order to attain angular homogeneity. This can be attributed, on the one hand, to the number of scattering processes within a specific unit volume for a given phosphor concentration, and on the other hand, to the specific scattering functions, both of which depend on the phosphor particle diameter.
Titel:
The Effect of the Phosphor Particle Sizes on the Angular Homogeneity of Phosphor-Converted High-Power White LED Light Sources
Seiten:
1181–1188
Publikationsdatum
2009-08

Publikationsreihe

Nummer
15
Beitrag
4
ISSN
1558-4542
Proceedings
IEEE Journal of Selected Topics in Quantum Electronics
Weitere Dateien und links
Jahr/Monat:
2009

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