LED正向压降随温度的变化关系研究

Research on the Relationship of the Change in Forward Voltage with Temperature of Light Emitting Diode

分析了LED正向压降随温度变化的物理机理 ,建立了恒流驱动下正向压降随温度的变化系数测试系统 对不同材料、不同发射波长的LED电压随温度变化系数进行了系统的实验研究 ,利用最小二乘法对实验数据进行了线性拟合 ,得到了不同发射波长的AlGaInP、InGaN材料LED的电压随温度变化系数 ,对超高亮度LED。

Physical mechanism of the forward voltage changes with the operator temperature is analyzed in this paper, and a measurement system is built to research these changes. The linear fitted method is used to analyze the experiment data, and the coefficient of the forward voltage changes with temperature is gotten for many types light emitting diodes, it is very important parameter for the thermal control and device structure design of ultra high brightness, power LED devices and assemble.