Color Uniformity Enhancement for WLEDs Using Inverted Dispensing Method
Color Uniformity Enhancement for WLEDs Using Inverted Dispensing Method
复制标题
使用反向点胶方法增强 WLED 的颜色均匀性
DOI:
10.1109/lpt.2017.2764100
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发表时间:
2017-12
影响因子:
2.6
通讯作者:
Binhai Yu
中科院分区:
文献类型:
--
作者:
Jiasheng Li;Caiman Yan;Zongtao Li;Guanwei Liang;Yong Tang;Binhai Yu
The inverted dispensing (ID) method is proposed to fabricate remote phosphor layers (RPLs) with cone-like shapes for white light-emitting diodes (WLEDs) to improve their color uniformity. We introduce surface evolver packages and optical simulations to study the effect of the surface tension on the optical performance of these WLEDs during the ID process. The results show that a decreasing surface tension contributes to a sharpened geometry of the RPL. This sharpened surface geometry is responsible for the optimization of the color uniformity by deflecting blue light towards central angles. The proposed ID method is simple and efficient. The color uniformity performance can be tuned by selecting silicone with a proper surface tension without affecting the total correlated color temperature and sacrificing the WLED’s optical power.
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