远程荧光粉寿命和颜色维护的标准测试

　　远程荧光粉寿命和颜色维护的标准测试

　　LED照明产品的商业化过程的一部分，特别是如果制造商正在申请认证，如能源之星计划，涉及测试寿命和颜色一致性的夹具在长期内。

　　测试标准如照明工程协会北美国（IES）LM-80（表征通量和颜色维护）和tm-21（预测长期通量维护）解释如何从结果进行测试和估计寿命，但工作是费时和繁琐。然而，由于传统的白光LED已经有好几年了，有大量的测试数据，制造商可以利用它来简化这个过程。

　　即便如此，应该指出的是，远程荧光粉是一种新近推出的技术，据说它比传统的白光LED具有更高的功效，但还没有受到其他LED产品的长期测试。更糟糕的是，目前还没有关于远距离荧光器件特性和寿命预测的测试标准。

　　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.