基于双向热阻模型的光电热一体化理论（英文）

Photo-Electro-Thermal Theory with Bidirectional Thermal Model

通过双向热阻模型描述LED系统内部双向散热路径,进而构建光电热一体化模型。基于双向热阻模型参数,光电热一体化模型可高精度预测LED系统的结温以及光通量。实验验证结果表明,基于所提出的双向热阻模型的结温计算值和实验值的平均误差在5.3%之内,而采用传统的单向热阻模型的结温计算值和实验值的平均误差达到11.2%。基于双向热阻模型的光电热一体化理论,光通量的计算值与实验值的平均误差在6.3%之内。

An estimation method for the junction temperature of LED devices based on bidirectional thermal model was proposed in this paper. The bidirectional thermal model obtained in thermal measured procedure was applied to the original PET theory to predict the luminous flux. For the junction temperature,the average deviation between the unidirectional model and the measurement is about 11. 2% and that between the bidirectional model and the measurement is 5. 3%. For luminous flux,the average deviation between the PET theory with bidirectional model and the measurement is 6. 3%. The calculated results are in good agreement with the measurements. These results confirm that the PET theory with bidirectional thermal model can provide accurate predictions for luminous flux.