LED调色：基础与背景

　　LED调色：基础与背景

　　介绍

　　本应用笔记介绍几个方法来创建颜色一致的基于LED的照明产品，引导读者如何与Cree的产品有效的工作来实现这个目标。

　　与所有半导体器件一样，LED具有材料和工艺的变化，从而产生与性能相应变化的产品。LED分级和包装来平衡与照明行业需求的制造过程的本质。照明类LED产品是由固态照明行业的需求，应用要求和行业标准，包括颜色一致性，以及颜色和流明维护。

　　led照明中颜色一致性的必要性

　　没有什么比图片更能说明每个照明技术需要提供一致的颜色。这是我们正在努力解决的问题的一个例子。

　　Though this illustration is from an array of HID lamps illuminating the facade of a building， it shows the undesirable results of inconsistent color in manufacture and color maintenance of luminaires as they age.

　　An increasingly active industrial policy in the United States， European Union and throughout the world， is resulting in a rigorous set of performance requirements for LED lighting applications. For example， the 2010 document “ENERGY STAR® Program Requirements for Integral LED Lamps”2 proposes stringent requirements， significantly above those for CFLs3， the first industrial policy mandated illumination technology. The LED Lamp requirements were preceded by the 2008 document “ENERGY STAR Program Requirements for Solid State Lighting Luminaires4.” In each of these documents， there are requirements in CCT， CRI， lumen and color maintenance for an Energy Star approved LED illumination product， shown in Tables 1 and 2 below.