遠(yuǎn)程熒光粉壽命和顏色維護(hù)的標(biāo)準(zhǔn)測(cè)試

　　LED照明產(chǎn)品的商業(yè)化過程的一部分，特別是如果制造商正在申請(qǐng)認(rèn)證，如能源之星計(jì)劃，涉及測(cè)試壽命和顏色一致性的夾具在長(zhǎng)期內(nèi)。

　　測(cè)試標(biāo)準(zhǔn)如照明工程協(xié)會(huì)北美國（IES）LM-80（表征通量和顏色維護(hù)）和tm-21（預(yù)測(cè)長(zhǎng)期通量維護(hù)）解釋如何從結(jié)果進(jìn)行測(cè)試和估計(jì)壽命，但工作是費(fèi)時(shí)和繁瑣。然而，由于傳統(tǒng)的白光LED已經(jīng)有好幾年了，有大量的測(cè)試數(shù)據(jù)，制造商可以利用它來簡(jiǎn)化這個(gè)過程。

　　即便如此，應(yīng)該指出的是，遠(yuǎn)程熒光粉是一種新近推出的技術(shù)，據(jù)說它比傳統(tǒng)的白光LED具有更高的功效，但還沒有受到其他LED產(chǎn)品的長(zhǎng)期測(cè)試。更糟糕的是，目前還沒有關(guān)于遠(yuǎn)距離熒光器件特性和壽命預(yù)測(cè)的測(cè)試標(biāo)準(zhǔn)。

　　This is unfortunate because such test data would both improve the probability of successful commercialization and allow both engineers and consumers to make direct comparisons of this promising technology with existing products， particularly as research has indicated that remote-phosphor products should last much longer than conventional white LEDs.

　　This article considers how phosphor degradation affects the life of conventional white LEDs compared with remote phosphor. The article then follows on to explain how far authorities have progressed in drafting test standards for remote-phosphor devices. Finally， an examination of the lifetime and color maintenance claims made by manufacturers of remote-phosphor devices already on the market is included.