无导光板LED平板灯获得表面照度均匀的投射器设计
发布时间：2018-10-09 12:07
【摘要】：白光LED平板灯凭借其独特自然的灯光效果得到了广泛的好评，鉴于平板灯中导光板与LED存在光耦合效率低，吸收、反射损耗大问题，本论文研究了一种无导光板LED平板灯，并重点进行表面照度均匀的高效投射器光学设计，用于提高LED平板灯的出光效率和照度均匀性，采用投射器代替导光板可使LED平板灯的重量轻，制作成本低，光损失小。照明光学设计中一般的投射器研究均基于正面均匀照明的目的，本文的主要创新点在于首次研究了侧面近场均匀照明的LED投射器，实现了出光效率高和表面亮度均匀性好的LED平板灯设计，拓展了LED投射器的应用领域。 论文概述了国内外LED投射器的研究现状，介绍了利用软件MATLAB、SolidWorks和TracePro设计用于无导光板LED平板灯的LED投射器设计方法，，并建立了无导光板LED平板灯仿真模型。 基于无导光板LED平板灯的特殊结构，研究了两种高效LED投射器，一种是自由曲面透镜投射器，用于单双面LED平板灯，另一种是柱面列阵投射器，用于双面LED平板灯。投射器对LED光源所发出的光进行重新分配。基于几何光学和能量守恒原理，将LED出射光线按照极向角进行分割，按照光线能量（即光通量）均分的原则，使目标面相同分割区域内具有相同数量的光线。通过MATLAB编程求得投射器的外形轮廓曲线，利用SolidWorks软件上建立出光学仿真模型，最后通过Tracepro软件进行光线追迹仿真验证LED投射器的光学效果，及其应用于无导光板LED平板灯的可行性。结果表明本文设计的LED投射器具有很高的出光效率和侧面目标照明均匀性，应用于无导光板LED平板灯，对面积为240mm360mm的LED平板灯的仿真结果为，柱面透镜列阵投射器的出光效率最佳达96.03%，自由曲面投射器侧面照明目标面（平板灯出光面）均匀度最佳为96.6%。 根据上述设计投射器模型，利用激光打标机实验制作了投射器模具，包括柱面透镜列阵LED投射器和自由曲面透镜LED投射器模具，并通过热模压机实验制作了PMMA投射器。将理论计算结果与实验数据进行对比，对设计方法的正确性进行验证，并且实验中获得了平板灯面板最佳照度均匀性为95.74%。
[Abstract]:The white LED flat lamp has been widely praised for its unique natural lighting effect. In view of the low efficiency of light coupling between the light guide plate and the LED, the problem of high absorption and reflection loss, a kind of LED flat panel lamp without light guide is studied in this paper. The optical design of high efficiency projector with uniform surface illumination is emphasized, which is used to improve the efficiency and uniformity of illumination of LED flat-panel lamp. Using projector instead of light guide plate can make the weight of LED flat lamp light, manufacture cost low and light loss small. The general research of projectors in lighting optical design is based on the purpose of frontal uniform illumination. The main innovation of this paper is to study the LED projector with lateral near-field uniform illumination for the first time. The design of LED flat lamp with high light efficiency and good surface brightness uniformity is realized, and the application field of LED projector is expanded. This paper summarizes the research status of LED projector at home and abroad, introduces the design method of LED projector used for LED flat lamp without guide plate by using software MATLAB,SolidWorks and TracePro, and establishes the simulation model of LED flat lamp without guide plate. Based on the special structure of LED flat lamp without light guide plate, two kinds of high efficient LED projectors are studied, one is a free-form curved lens projector, which is used for a single and double side LED flat panel lamp, the other is a cylindrical array projector, which is used for a double-sided LED flat panel lamp. The projector redistributes the light emitted by the LED light source. Based on the principle of geometric optics and conservation of energy, the LED emission ray is divided according to the polar angle and the principle of equal distribution of ray energy (i.e. luminous flux) to make the same number of rays in the same segmentation area of the target surface. The outline curve of projector is obtained by MATLAB programming, and the optical simulation model is established by using SolidWorks software. Finally, the optical effect of LED projector is verified by ray tracing simulation with Tracepro software. And the feasibility of its application to LED flat lamp without light guide plate. The results show that the LED projector designed in this paper has high luminous efficiency and uniformity of side target illumination. It is applied to LED flat lamp without light guide plate. The simulation results of LED flat lamp with area of 240mm360mm are as follows: The optimum light efficiency of cylindrical lens array projector is 96.03, and the uniformity of flank illumination target surface of free-form surface projector is 96.6. According to the designed projector model, the projector mould, including cylindrical lens array LED projector and freeform curved lens LED projector mold, is made by using laser marking machine, and PMMA projector is made by hot mold press experiment. By comparing the theoretical results with the experimental data, the correctness of the design method is verified, and the optimum illumination uniformity of the flat panel is obtained in the experiment.
【学位授予单位】：华侨大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM923.34
本文编号：2259279
[Abstract]:The white LED flat lamp has been widely praised for its unique natural lighting effect. In view of the low efficiency of light coupling between the light guide plate and the LED, the problem of high absorption and reflection loss, a kind of LED flat panel lamp without light guide is studied in this paper. The optical design of high efficiency projector with uniform surface illumination is emphasized, which is used to improve the efficiency and uniformity of illumination of LED flat-panel lamp. Using projector instead of light guide plate can make the weight of LED flat lamp light, manufacture cost low and light loss small. The general research of projectors in lighting optical design is based on the purpose of frontal uniform illumination. The main innovation of this paper is to study the LED projector with lateral near-field uniform illumination for the first time. The design of LED flat lamp with high light efficiency and good surface brightness uniformity is realized, and the application field of LED projector is expanded. This paper summarizes the research status of LED projector at home and abroad, introduces the design method of LED projector used for LED flat lamp without guide plate by using software MATLAB,SolidWorks and TracePro, and establishes the simulation model of LED flat lamp without guide plate. Based on the special structure of LED flat lamp without light guide plate, two kinds of high efficient LED projectors are studied, one is a free-form curved lens projector, which is used for a single and double side LED flat panel lamp, the other is a cylindrical array projector, which is used for a double-sided LED flat panel lamp. The projector redistributes the light emitted by the LED light source. Based on the principle of geometric optics and conservation of energy, the LED emission ray is divided according to the polar angle and the principle of equal distribution of ray energy (i.e. luminous flux) to make the same number of rays in the same segmentation area of the target surface. The outline curve of projector is obtained by MATLAB programming, and the optical simulation model is established by using SolidWorks software. Finally, the optical effect of LED projector is verified by ray tracing simulation with Tracepro software. And the feasibility of its application to LED flat lamp without light guide plate. The results show that the LED projector designed in this paper has high luminous efficiency and uniformity of side target illumination. It is applied to LED flat lamp without light guide plate. The simulation results of LED flat lamp with area of 240mm360mm are as follows: The optimum light efficiency of cylindrical lens array projector is 96.03, and the uniformity of flank illumination target surface of free-form surface projector is 96.6. According to the designed projector model, the projector mould, including cylindrical lens array LED projector and freeform curved lens LED projector mold, is made by using laser marking machine, and PMMA projector is made by hot mold press experiment. By comparing the theoretical results with the experimental data, the correctness of the design method is verified, and the optimum illumination uniformity of the flat panel is obtained in the experiment.
【学位授予单位】：华侨大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM923.34
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