天气预报过程详解.ppt

LED照明产品检测方法中的缺陷和改善的对策
俞安琪
国家电光源质量监督检验中心(上海)、国家灯具质量监督检验中心
上海时代之光照明电器检测有限公司
摘要:
传统的LED及其模块光、色、D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。
关键词:
标定、Vf—TJ曲线、LED结温、修正、参考点温度
Deficiency and improvement means of testing methods of LED lighting products
Yu Anqi,
China National Light Source Quality Supervision Testing Centre (Shanghai),
China National Lighting Fitting Quality Supervision Testing Centre,
Shanghai Alpha Lighting Equipment Testing Ltd.
Abstract:
Traditional testing methods of electrical and photometric parameters of LED and its module are electric pulse-driving, CCD transient spectral testing methods, and testing methods after thermal equilibrium under given condition. But 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, the 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 applying LED, 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 lighting apparatus applying LED, 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 lighting apparatus applying LED.
Key word:
control and set, Vf-TJ curve, LED junction temperature, control, reference point temperature
序言
对于一个新兴的产品,其产品自身的发展总是先于产品标准和检测方法。虽然产品的标准和检测方法不可能先于产品的研发,但是,产品的标准和检测方法应尽可能地紧跟产品设计开发的进度,因为产品的标准和检测方法的制定过程本身就是对产品研发过程的回顾研讨和小结,