Methodology of Junction Temperature Characterization of Alternating Current Light-Emitting Diodes
Xu Ge
Yu Delu
Zou Bing
Xu Jian
Abstract：At present , the measurement techniques of the junction temperatures of light emitting diodes ( LEDs) are developed for AC-LED.In the present work , a novel approach of threshold voltage method is proposed for junction temperature characterization of AC-LEDs.The new method was tested , and results of which were compared with the traditional peak wavelength method , showing a good agreement within 4℃. Further analysis suggested that the error of the threshold voltage method can be narrowed down to ±2.5 ℃when the reference current is chosen as ~1 mA. It is concluded that the method of threshold voltage is accurate and simple to implement , making it highly suitable for determining the junction temperatures of AC-LEDs in industry .
Keywords：AC-LEDjunction temperaturemeasuring methodspeak wavelength methodthreshold voltage method
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 38-41 )