基于照度分割反馈法的扩展光源背光源设计

发布时间：2018-01-05 07:35

本文关键词：基于照度分割反馈法的扩展光源背光源设计　出处：《半导体光电》2017年01期 　论文类型：期刊论文

【摘要】：以LED为扩展光源,提出一种基于照度分布分割与反馈的方法为LED设计非常紧凑的光学自由曲面透镜,进而设计实现了大距高比(DHR)的直下式背光源。与子光学面联接构成光学面的过程相对应,总照度分布被分割为子照度分布。通过修正子光学面来调整子照度分布,使得总照度分布足够接近于目标照度分布,所需光学面就被构建出来了。该设计过程不依赖于仿真,简便易行,适用广泛。作为实例,一个非常紧凑(透镜的中心高度与LED尺寸相等)的自由曲面透镜被设计出来,作为直下式背光源的配光透镜。仿真结果表明,背光源照度分布的均匀度达到了0.91,相对标准差(RSD)低至0.020 2,总的光能利用率达到了85.5%。
[Abstract]:With LED as the extended source, a method is proposed based on the illuminance distribution of segmentation and feedback for the freeform lens LED design is very compact, and the design and implementation of a large distance ratio (DHR) of the direct type back light source is connected with the sub surface. The optical optical surface process corresponding to the total illumination distribution is divided into sub illuminance distribution. To adjust the illuminance distribution by modifying the sub optical surface, so that the total illuminance distribution is close enough to the target illuminance distribution, the required optical surface was constructed. The design process does not depend on the simulation, is simple and widely applicable. For example, a very compact (center height lens with LED the size of the free-form surface lens) was designed as a direct backlight light distribution lens. The simulation results show that the backlight illumination distribution uniformity can reach 0.91, the relative standard deviation (RSD) as low as 0.0202, the total energy The utilization rate is up to 85.5%.

【作者单位】：清华大学深圳研究生院半导体照明实验室;
【分类号】：TN312.8
【正文快照】： 0引言近年来,发光二极管(LED)在背光源等照明和非成像光学领域获得了越来越广泛的应用。LED直下式背光源的基本目标是[1-2],LED阵列发出的光经光学系统后在靶平面形成高均匀度的照度分布。另一个重要目标是实现很薄的厚度,这就要求LED和靶面之间的高度H足够小,因而在为LED设计

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