LED chip characteristic parameter obtaining method

The invention discloses an LED chip characteristic parameter obtaining method. The method is characterized in that points and data are captured according to a characteristic curve in an LED chip product manual, and change relation of luminous flux along with junction temperature (Tj) and forward current (If) as well as change relation of work voltage along Tj and If are obtained. Curve fitting is used to obtain a fitting formula between the luminous flux and Tj and If and a fitting formula between the work voltage and the Tj and the If, and further eight characteristic parameters of an LED chip are obtained. 本发明公开了种LED芯片特性参数获取方法，主要特征在于根据LED芯片产品手册中的特性曲线，进行取点及数据抓取，获得LED芯片的光通量及工作电压随结温（Tj）和正向电流（If）的变化关系。通过曲线拟合，获得光通量及工作电压与结温（Tj）和正向电流（If）的拟合公式，进而得到LED芯片的8项特性参数。