Lumen Decay Prediction in LED Lamps

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Lumen Decay Prediction in LED Lamps

Conference Paper (2016)

Author(s)

Bo Sun (State Key Laboratory of Solid State Lighting, TU Delft - Beijing Delft Institute of Intelligent Science and Technology)

Xuejun Fan (State Key Laboratory of Solid State Lighting, Lamar University)

Willem van Driel (Philips Lighting Research, TU Delft - Electronic Components, Technology and Materials)

Thomas Michel (Lamar University)

Jiang Zhou (Lamar University)

Guo Qi Zhang (TU Delft - Electronic Components, Technology and Materials)

Reliability LED Lamp Lumen Decay Prediction

DOI related publication

https://doi.org/10.1109/EuroSimE.2016.7463391 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:0e6a0e1b-bcce-4037-955b-b1293bc9d2b4

More Info

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Publication Year

2016

Language

English

Pages (from-to)

1-5

ISBN (electronic)

978-1-5090-2106-2

Event

Downloads counter

193

Abstract

Lumen decay of LEDs is affected by time, junction temperature and input current. In LED lamps, both temperature and input current vary with time due to driver's degradation and temperature change of lamps. This paper proposes a lumen decay prediction method which considers effects of operation time, temperature and current by taking the interaction of LED and driver performance into account. In particular, a lumen decay model for LED source with consideration of the ever changing current and temperature is developed and validated experimentally. Several scenarios are analyzed theoretically by applying different assumptions.