Developing a standard measurement and calculation procedure for high brightness LED junction temperature

Name: Developing a standard measurement and calculation procedure for high brightness LED junction temperature
Author: Arık, Mehmet, Kulkarni, K. S., Royce, C., Weaver, S.

İsim	Developing a standard measurement and calculation procedure for high brightness LED junction temperature
Yazar	Arık, Mehmet, Kulkarni, K. S., Royce, C., Weaver, S.
Basım Tarihi:	2014
Konu	LED junction temperature, Forward voltage, Wavelength shift, Thermal transient behavior
Tür	Belge
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1087-9870
Kayıt Numarası	389990fd-90cc-4f7d-8abb-000c29f92be6
Lokasyon	Mechanical Engineering
Tarih	2014
Notlar	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Örnek Metin	White light emitting diodes (LEDs) are appearing in general illumination applications. Clusters of such LEDs can replace an incandescent light bulb of equal luminosity on the merit of considerably low power consumption. However the optical performance and working life of these LED packages are strongly dependent on the temperature of the p-n junction of the LED. Hence it is very critical to determine the temperature of the junction. Three methods - forward voltage change, peak wavelength shift and infrared thermal imaging are employed to determine the junction temperature. Forward voltage change method is found to be the most accurate method (± 3 °C) for an optimized set of parameters. Analytical model is proposed for the thermal transient behavior of the LED junction and the predictions are compared with experimental results. A good agreement is observed between that of two experimental methods. Thermal resistance of the LED package is estimated analytically and experimentally. Experimental values show a larger variation than expected through material property variation.
DOI	10.1109/ITHERM.2014.6892277

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Developing a standard measurement and calculation procedure for high brightness LED junction temperature

Yazar Arık, Mehmet, Kulkarni, K. S., Royce, C., Weaver, S.

Basım Tarihi 2014

Konu LED junction temperature, Forward voltage, Wavelength shift, Thermal transient behavior

Tür Belge

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1087-9870

Kayıt Numarası 389990fd-90cc-4f7d-8abb-000c29f92be6

Lokasyon Mechanical Engineering

Tarih 2014

Notlar Due to copyright restrictions, the access to the full text of this article is only available via subscription.

Örnek Metin White light emitting diodes (LEDs) are appearing in general illumination applications. Clusters of such LEDs can replace an incandescent light bulb of equal luminosity on the merit of considerably low power consumption. However the optical performance and working life of these LED packages are strongly dependent on the temperature of the p-n junction of the LED. Hence it is very critical to determine the temperature of the junction. Three methods - forward voltage change, peak wavelength shift and infrared thermal imaging are employed to determine the junction temperature. Forward voltage change method is found to be the most accurate method (± 3 °C) for an optimized set of parameters. Analytical model is proposed for the thermal transient behavior of the LED junction and the predictions are compared with experimental results. A good agreement is observed between that of two experimental methods. Thermal resistance of the LED package is estimated analytically and experimentally. Experimental values show a larger variation than expected through material property variation.

DOI 10.1109/ITHERM.2014.6892277