Two-step optimization for a pattern array to improve light extraction efficiency and uniformity in light guide plates.
Two-step optimization for a pattern array to improve light extraction efficiency and uniformity in light guide plates.
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DOI：
10.1364/ao.58.009178
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发表时间：
2019-11
期刊：
影响因子：
1.9
通讯作者：
Qian Guo;Y. Ye;Enguo Chen;Sheng Xu
中科院分区：
文献类型：
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作者：
Qian Guo;Y. Ye;Enguo Chen;Sheng Xu
图案阵列分布决定了导光板(LGPS)的初级光学性能。为了提高背光组件的效率和均匀性，提出了一种两步优化方法。第一步，分析了基于扩展LED光源的照度分布，用九次多项式函数定义图案密度，设计了初始圆阵列。对于第二步，对方向图模式进行精细优化以搜索最优的方向图阵列。通过仿真和实验验证了该方法的有效性。通过实验验证，LGPS是采用丝网印刷技术制造的。结果表明，与初始模式相比，正方形和正六边形方向图优化可以使效率和均匀性分别提高19.73%和6.37%。该方法在方向图阵列设计中具有广阔的应用前景。
The pattern array distribution determines the primary optical performance in light guide plates (LGPs). This paper presents a two-step optimization method for the pattern array to improve the efficiency and uniformity of the backlight module. For the first step, we analyze the illuminance distribution based on the extended LED light source, and an initial circular pattern array is designed with the pattern density defined by a ninth-order polynomial function. For the second step, the pattern modes are finely optimized to search the optimal pattern array. This method is demonstrated through both simulation and experiment. From experimental verification, the LGPs are manufactured through silk-screen printing technology. The results show that square and regular hexagon pattern optimization can improve the efficiency and uniformity by 19.73% and 6.37%, respectively, when compared to the initial mode. Our approach will have broad prospects for pattern array design.