LED調(diào)色：基礎與背景

　　介紹

　　本應用筆記介紹幾個方法來創(chuàng)建顏色一致的基于LED的照明產(chǎn)品，引導讀者如何與Cree的產(chǎn)品有效的工作來實現(xiàn)這個目標。

　　與所有半導體器件一樣，LED具有材料和工藝的變化，從而產(chǎn)生與性能相應變化的產(chǎn)品。LED分級和包裝來平衡與照明行業(yè)需求的制造過程的本質(zhì)。照明類LED產(chǎn)品是由固態(tài)照明行業(yè)的需求，應用要求和行業(yè)標準，包括顏色一致性，以及顏色和流明維護。

　　led照明中顏色一致性的必要性

　　沒有什么比圖片更能說明每個照明技術(shù)需要提供一致的顏色。這是我們正在努力解決的問題的一個例子。

　　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.