LED照明产品检测方法中的缺陷和改善的对策

传统的LED及其模块光、色、电参数检测方法有电脉冲驱动,CCD快速光谱测量法,也有在一定的条件下,热平衡后的测量法,但这些方法的测量条件和结果与LED进入照明器具内的实际工作情况都相差甚远。文章介绍了通过Vf—TJ曲线的标出并控制LED在控定的结温下测量其光、色、电参数不仅对采用LED的照明器具的如何保证LED工作结温提供了目标限位,同时也使LED及其模块的光、色、电参数的测量参数更接近于实际的应用条件。文章还介绍了采用LED的照明器具如何测量LED的结温并确定LED参考点的限值温度与结温的函数关系。这对快速评估采用LED的照明器具的工作状态和使用寿命提供了一个有效的途径。

Deficiency and Improvement Means of Testing Methods of LED Lighting Products

Traditional testing methods of electrical and photometric parameters of LED and its module are electric pulse-driving,CCD transient spectral testing methods,or testing methods after thermal equilibrium under given condition. But all these testing conditions and results are far from the actual operating state when LED built in lighting apparatus. This article introduces,through the Vf-TJ curve,a testing methods of LED’s electrical and photometric parameters at a controlled and set junction temperature. It not only provides the target limit of how to ensure LED’s operating junction temperature for lighting apparatus,but also makes the tested electrical and photometric parameters of LED and its module be closer to actual operating condition. This article also introduces, for LED lighting apparatus, how to test LED ’ s junction temperature and confirm the function of LED reference point’s limit temperature and junction temperature. It provides an effective method to rapidly evaluate the operating state and life of LED lighting apparatus.