Designing single LED illumination distribution for direct-type backlight.
Designing single LED illumination distribution for direct-type backlight.
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DOI：
10.1364/ao.52.007022
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发表时间：
2013-10
期刊：
影响因子：
1.9
通讯作者：
Jinbo Zheng;Keyuan Qian
中科院分区：
文献类型：
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作者：
Jinbo Zheng;Keyuan Qian
本研究提出了一种通过在目标平面上设计单个 LED 照明分布 (SLID) 来实现 LED 阵列均匀照明的新方法。计算均方根误差变异系数最小的 SLID。对于方形LED阵列，照度均匀度达到0.94。设计了辅助透镜来实现计算出的 SLID。仿真结果表明，当远高比为3.33时，光照均匀度达到0.92。计算出的SLID可用于不同的距离高度比。当远高比为5时，照度均匀度达到0.91。该计算方法可用于不同种类的LED阵列。提出了一种针对实际直下式背光系统的透镜设计反馈方法。
This study presents a new method for achieving uniform illumination of an LED array by designing single LED illumination distribution (SLID) on the target plane. The SLID with the least coefficient of variation of the root mean squared error is calculated. For square LED arrays, the uniformity of illumination reaches 0.94. A secondary lens was designed to achieve the calculated SLID. Simulation results show that the uniformity of illumination reaches 0.92 when the distance-height ratio is 3.33. The calculated SLID can be used in different distance-height ratios. When the distance-height ratio is 5, the uniformity of illumination reaches 0.91. The calculation method can be used in different kinds of LED arrays. A feedback method of lens design is presented for a real direct-type backlight system.