Color Uniformity Enhancement for WLEDs Using Inverted Dispensing Method

Color Uniformity Enhancement for WLEDs Using Inverted Dispensing Method
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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
Binhai Yu
中科院分区:
工程技术3区
文献类型:
--
作者:
Jiasheng Li;Caiman Yan;Zongtao Li;Guanwei Liang;Yong Tang;Binhai Yu

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为了提高白光发光二极管(WLED)的颜色均匀性,提出了一种利用倒置分配(ID)方法制备锥形远方荧光层的方法。我们引入了表面演化程序和光学模拟来研究在ID过程中表面张力对这些WLED光学性能的影响。结果表明,表面张力的降低有助于RPL几何形状的锐化。这种锐化的表面几何形状负责通过将蓝色光偏转到中心角度来优化颜色一致性。所提出的ID方法简单有效。通过选择具有适当表面张力的有机硅,可以在不影响总相关色温和牺牲WLED光功率的情况下调整颜色均匀度性能。
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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