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Influence of junction temperature on the spectral power distribution of Light Emitting Diodes

Influence of junction temperature on the spectral power distribution of Light Emitting Diodes
File Size:
1.33 MB
Author:
Łukasz Budzyński
Email:
l[dot]budzynski[at]pb[dot]edu[dot]pl
Date:
23 February 2016
Downloads:
41 x

Abstract: This article describes electrical method for measuring junction temperature of high power LEDs. Measurement system consisting of a temperature controller and a thermostatic chamber was designed and constructed. A number of studies of LEDs in a typical thermal conditions that exist in luminaries were performed. Basing on these results, influence of junction temperature on luminous flux and spectral power distribution of LED was determined. Obtained results allow to optimize the construction of LED lighting fixtures, in the ambient temperature range from 0°C to 100°C, especially in the aspect of improving the photometric properties of the luminaire.

Keywords: LED, junction temperature, spectral power, measurement

Area: Electronics, Telecomunications and Informatics

 
 

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