Determining the junction temperature of GaN-based blue LED with the double spectral parameters

被引：0
作者：
Rao, Feng [1 ,2 ,3 ]
Guo, Jie [1 ]
Xu, Hao [1 ]
Xu, An-Cheng [1 ]
Zhu, Xi-Fang [1 ]
机构：
[1] Colleague of Electrical and Optoelectronic Engineering, Changzhou Institute of Technology, Changzhou
[2] Changzhou Institute of Modern Optoelectronic Technology, Changzhou
[3] Changzhou Key Laboratory of Optoelectronic Materials and Devices, Changzhou
来源：
Guangdianzi Jiguang/Journal of Optoelectronics Laser | 2015年 / 26卷 / 11期
关键词：
Centroid wavelength; Full width at half maximum (FWHM); Junction temperature measurement; Light emitting diode (LED); Spectroscopy;
D O I：
10.16136/j.joel.2015.11.0550
中图分类号：
学科分类号：
摘要：
A new method of determining the junction temperature of GaN-based blue light emitting diode (LED) based on the double spectral parameters is developed. The GaN-based blue LED spectral distributions with different ambient temperatures and pulsed currents are measured with spectrometer. Regardless of the heat induced by the pulsed current firstly, the relationships among drive current, centroid wavelength, full width at half maximum (FWHM) and junction temperature are obtained. And then combined with the spectral distribution in the real operating conditions, the drive current and the LED junction temperature are evaluated. The pulsed current-junction temperature compensation factor of the blue LEDs can be obtained by statistic analysis, which is used to improve the junction temperature on accuracy for the heat induced by pulsed current is considered. The results indicate that the pulsed current-junction temperature compensation factor is nearly constant for different types of GaN-based LEDs, which is 5 ℃/A with the rated power of 1 W and the pulse width of 2 ms. Compared with the forward voltage method, the average error of the junction temperature determined by LED spectral distribution is about 2 ℃. Therefore, the spectral distribution method can determine the junction temperature of GaN-based blue LED accurately. © 2015, Board of Optronics Lasers. All right reserved.
引用
收藏
页码：2083 / 2088
页数：5
相关论文
共 20 条
[1]  
Qiu X.-Z., Zhang F.-H., Li Y.-F., Junction temperature measurement and luminous properties research of the integrated packaged LED, Optoelectronics·Laser, 23, 9, pp. 1691-1695, (2012)
[2]  
Yung K.C., Liem H., Choy H.S., Et al., Thermal investigation of a high brightness LED array package assembly for various placement algorithm, Applied Thermal Engineering, 63, 1, pp. 105-118, (2014)
[3]  
Ozuturk E., Voltage-current characteristic of LED according to some optical and thermal parameters at pulsed high currents, Optik-International Journal for Light and Electron Optics, 126, 21, pp. 3215-3217, (2015)
[4]  
Park S.J., Jang D., Lee K.S., Thermal performance improvement of a radial heat sink with a hollow cylinder for LED downlight applications, International Journal of Heat and Mass Transfer, 89, 10, pp. 1184-1189, (2015)
[5]  
Wang J.C., Fang C.H., Wu Y.F., Et al., The effect of junction temperature on the optoelectrical properties of InGaN/GaN multiple quantum well light-emitting diodes, Journal of Luminescence, 132, 2, pp. 429-433, (2012)
[6]  
Senawiratne J., Chatterjee A., Detchprohm T., Junction temperature, spectral shift, and efficiency in GaInN-based blue and green light emitting diodes, Thin Solid Films, 518, 6, pp. 1732-1736, (2010)
[7]  
Wang J., Zhao X.J., Cai Y.X., Et al., Experimental study on the thermal management of high-power LED headlight cooling device integrated with thermoelectric cooler package, Energy Conversion and Management, 101, 9, pp. 532-540, (2015)
[8]  
Jang D., Park S.J., Lee K.S., Thermal performance of a PCB channel heat sink for LED light bulbs, International Journal of Heat and Mass Transfer, 89, 10, pp. 1290-1296, (2015)
[9]  
Jeong M.W., Jeon S.W., Kim Y., Optimal thermal design of a horizontal fin heat sink with a modified-opening model mounted on an LED module, Applied Thermal Engineering, 91, 11, pp. 105-115, (2015)
[10]  
Measurement of LEDs
12