LED光取出技术研究进展

Development of research on optical extraction techniques of LED

大功率白光LED目前存在着光取出效率不高的问题。介绍了提高白光LED光取出效率的主要方法与途径,包括光子晶体,表面粗化,倒装芯片,二次光学设计以及荧光粉远离。这些技术不同程度提高了LED的光取出效率,是解决其发光效率不高的有效途径。

Optical extraction efficiency is not high in high-power white LED, Main methods and approaches were introduced in improving optical extraction efficiency of white LED, including photonic crystals, surface roughening, secondary optic design, flip chip, and remote phosphors. These techniques have increased optical extraction efficiency of LED, and are effective approaches to avoid the low-luminous efficiency.