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Proceedings Paper

The impact of the color conversion element configuration on its thermal response in phosphor converted LEDs
Author(s): Franz P. Wenzl; Paul Fulmek; Christian Sommer; Paul Hartmann; Peter Pachler; Hans Hoschopf; Franz Schrank; Gregor Langer; Johann Nicolics
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Paper Abstract

Color temperature constancy and color temperature maintenance are key issues in the context of the utilization of light-emitting diodes (LEDs) for general lighting applications. For a systematic improvement, it is imperative to understand how compositional, optical and thermal properties of the color conversion elements (CCE), which typically consist of phosphor particles embedded in a transparent matrix material, affect the constancy of a desired color temperature of a white LED source under operation. In particular, thermal stress, like a distinct thermal load of the CCEs under operation may also cause notable color shifts. In order to gain a better understanding of the thermal behavior of CCEs under operation, in this contribution we give by means of a combined optical and thermal simulation procedure a comprehensive discussion on the impact of different CCE shapes and sizes on their thermal responses.

Paper Details

Date Published: 30 September 2013
PDF: 8 pages
Proc. SPIE 8835, LED-based Illumination Systems, 88350N (30 September 2013); doi: 10.1117/12.2024886
Show Author Affiliations
Franz P. Wenzl, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
Paul Fulmek, Technische Univ. Wien (Austria)
Christian Sommer, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
Paul Hartmann, JOANNEUM RESEARCH Forschungsgesellschaft mbH (Austria)
Peter Pachler, Tridonic Jennersdorf GmbH (Austria)
Hans Hoschopf, Tridonic Jennersdorf GmbH (Austria)
Franz Schrank, Tridonic Jennersdorf GmbH (Austria)
Gregor Langer, Austria Technologie & Systemtechnik AG (Austria)
Johann Nicolics, Technische Univ. Wien (Austria)

Published in SPIE Proceedings Vol. 8835:
LED-based Illumination Systems
Jianzhong Jiao, Editor(s)

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