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Proceedings Paper

Prediction of L70 lumen maintenance and chromaticity for LEDs using extended Kalman filter models
Author(s): Pradeep Lall; Junchao Wei; Lynn Davis
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Paper Abstract

Solid-state lighting (SSL) luminaires containing light emitting diodes (LEDs) have the potential of seeing excessive temperatures during operation or during transportation and storage. Presently, the TM-21 test standard is used to predict the L70 life of SSL Luminaires from LM-80 test data. The underlying TM-21 Arrhenius Model is based on population averages, may not capture the failure physics in presence of multiple failure mechanisms, and does not predict the chromaticity shift. In this paper, Kalman Filter (KF) and Extended Kalman Filters (EKF) have been used to develop models for 70-percent Lumen Maintenance Life Prediction and chromaticity shift for a LEDs used in SSL luminaires. Ten-thousand hour LM-80 test data for various LEDs have been used for model development.

Paper Details

Date Published: 30 September 2013
PDF: 19 pages
Proc. SPIE 8835, LED-based Illumination Systems, 88350M (30 September 2013); doi: 10.1117/12.2027593
Show Author Affiliations
Pradeep Lall, Auburn Univ. (United States)
Junchao Wei, Auburn Univ. (United States)
Lynn Davis, RTI International (United States)

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

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