为提高照明光源质量， 采用三基色的混光方法，实现了白光动态相关色温精确可调。根据色度学光色设计，建立了RGB三基色混光数学模型。选取合适光色参数的三基色光源进行3000~7500 K不同相关色温的白光混光实验分析，实验结果与理论白光色温偏差较大。分析可知，结温是影响色温偏差的主要因素。通过调节占空比来修正三基色光通量的输出，从而确定了占空比和目标相关色温的关系。实验结果表明，修正后的色温偏差在50 K以内，合成白光光源的参数与理论白光的性能指标参数吻合，实现了不同相关色温变化的白光光源，并通过调节三基色光通量实现了温度补偿。

In order to improve lighting quality and achieve accurate and adjustable dynamic correlated color temperature of white light, a method of tricolor light mixing is used. Based on the colorimetric light color design, one mathematical model of RGB tricolor mixing is established. Appropriate parameters of tricolor LEDs are chosen to conduct the experiment of mixing white light with different correlated color temperature between 3000 K and 7500 K. The experimental color temperature of white light has a large deviation from the theoretical one. Further analysis tells us that the junction temperature is the main factor influencing the color temperature deviation. By adjusting the duty ratio to correct the output of the tricolor luminous flux, the relationship between the duty ratio and the target correlated color temperature is obtained. The experimental results show that the corrected color temperature deviation is within 50 K. The parameters for mixing white light sources match well with the theoretical ones and the white light source with different correlated color temperature is achieved. Temperature compensation can be realized by adjusting the tricolor luminous flux.