制造商對美國能源部LED效能目標穩步推進

　　美國能源部（DOE）是當局的先鋒，鼓勵發展固態照明（SSL）。雖然制造商已經取得了巨大的進步，其產品的功效，美國能源部熱衷于推動LED制造商更難以實現LED技術的全部潛力。

　　白光LED用熒光粉轉換––皇家藍色LED結合釔鋁石榴石（YAG）熒光粉––和混色發光二極管––單獨的紅，綠，藍（RGB）設備的光混合––擁有199和266流明/瓦的理論最大的功效，分別為（一次內在包裝效率低下了考慮到）。

　　美國能源部已通過這些數字作為目標，并鼓勵制造商加倍努力，但主要挑戰織機。本文總結了今天的LED的性能和展望前面的障礙，將需要清除之前，美國能源部的野心得到滿足。

　　DOE sets the goal

　　The U.S. Energy Policy Act of 2005 directs the DOE to “support research， development， demonstration， and commercial application activities related to advanced solid-state lighting technologies based on white light emitting diodes.” In support of that objective， DOE periodically releases its Multi-Year Program Plan.1 Last published in April 2012， the plan is a comprehensive document that focuses on core technology research and product development， which is an important part of the department’s efforts to guide SSL technology from laboratory to marketplace.

　　The plan includes the DOE’s projections of efficacy， detailing the targets from 2011 onwards （Table 1）。 Projections are included for the two leading white-light LED technologies： royal-blue LEDs combined with YAG-phosphor conversion and RGB color-mixed LEDs （see the TechZone articles “Whiter， Brighter LEDs” and “Creating White Light by Adding – Not Subtracting – Color” respectively.）