中文摘要：

从发光二极管主波长的定义出发，比较分析了计算发光二极管主波长的3种方法，并提出了一种优化的计算方法。先将色品图划分为10个区域，再结合线性插值运算，可以减少运算次数、提高寻找速度，简化了求主波长的计算过程，同时使主波长计算结果的精确度优于0．1nm。

英文摘要：

A novel algorithm to determine the dominant wavelength of LED is proposed based on the definition of dominant wavelength and the comparisons of three conventional calculation methods. To realize this algorithm, the CIE1931 - xy Chromaticity Diagram is divided into 10 different regions within the wavelength range from 380.0 nm to 780.0 nm with a resolution of 1.0 nm, then the linear interpolation is implemented to locate the dominant wavelength with a resolution as precise as 0.1 nm. This algorithm not only very facilitates the calculation speed to determine the dominant wavelength of LED, but also increases the resolution precision.