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30 September 2013 The impact of the color conversion element configuration on its thermal response in phosphor converted LEDs
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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.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Franz P. Wenzl, Paul Fulmek, Christian Sommer, Paul Hartmann, Peter Pachler, Hans Hoschopf, Franz Schrank, Gregor Langer, and Johann Nicolics "The impact of the color conversion element configuration on its thermal response in phosphor converted LEDs ", Proc. SPIE 8835, LED-based Illumination Systems, 88350N (30 September 2013); https://doi.org/10.1117/12.2024886
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