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首页> 外文期刊>Applied optics >Improvement in angular color uniformity of white light-emitting diodes using screen-printed multilayer phosphor-in-glass
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Improvement in angular color uniformity of white light-emitting diodes using screen-printed multilayer phosphor-in-glass

机译：使用丝网印刷的多层玻璃荧光粉改善白色发光二极管的角度颜色均匀性

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Angular color uniformity (ACU) is a key optical property of white light-emitting diodes (WLEDs) and high ACU is strongly demanded in illumination applications. In this paper, a multilayer phosphor-in-glass (PiG), which can be produced by the screen-printing method, is proposed to improve the ACU of LED packages. The screen-printing method provides a feasible scheme to produce multilayer, various-shaped PiG with a controllable pattern. Angular correlated color temperature (CCT) distributions of the LED packages with multilayer PiG are simulated numerically and measured experimentally. Optical performance of the LED package with optimized three-layer cone-shaped PiG is compared with that of packages with two-layer and one-layer PiG. The experimental measurements indicate that the deviation of angular CCT can be reduced from 761 to 171 K by cone-shaped PiG at average CCT of 6000 K. The results demonstrate that higher angular color uniformity can be achieved by LED packages with multilayer cone-shaped PiG. (C) 2014 Optical Society of America
机译：角颜色均匀性（ACU）是白色发光二极管（WLED）的关键光学特性，在照明应用中强烈要求高ACU。为了改善LED封装的ACU，本文提出了一种可以通过丝网印刷法生产的多层玻璃荧光粉（PiG）。丝网印刷法提供了一种可行的方案来生产具有可控图案的多层，各种形状的PiG。数值模拟了多层PiG的LED封装的角相关色温（CCT）分布，并进行了实验测量。将具有优化的三层锥形PiG的LED封装与具有两层和一层PiG的封装的光学性能进行比较。实验测量表明，在平均色温为6000 K时，圆锥形PiG可以将角CCT的偏差从761 K减小到171K。结果表明，多层圆锥形PiG的LED封装可以实现更高的角度颜色均匀性。 （C）2014年美国眼镜学会

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