直下式LED平板灯的均匀照明设计

发布时间：2018-11-24 07:50

【摘要】：针对超薄LED平板灯导光板价格昂贵以及传统直下式LED平板灯厚度厚和LED数量多等问题,设计了新型直下式LED平板灯。基于边缘光线理论,对光源和目标面进行网格划分并形成映射关系,由Snell公式推导出内外自由曲面的微分方程,采用迭代法计算出内外自由曲面数据,设计实现适用于直下式LED平板灯的大角度二次光学透镜。研究表明:双自由曲面大角度透镜可实现对LED 150°的大角度配光,其照度均匀度为0.86,且能量利用率为99.5%。在不同厚度下,利用大角度二次光学透镜的LED单元阵列距高比(D/H)约等于3时,目标面上的照度均匀度均达到0.88以上。通过对新型直下式LED平板灯照明效果进行模拟,结果完全满足国家建筑照明设计标准,且LED的使用数量为相同功率下传统直下式LED平板灯的30%,减小了20mm的厚度,大大降低了LED平板灯的生产成本。
[Abstract]:Aiming at the problems of high price of light guide plate of ultra-thin LED flat lamp, thickness of traditional LED flat lamp and large quantity of LED, a new type of LED flat lamp with straight down type is designed. Based on the edge ray theory, the light source and the target surface are meshed and mapped. The differential equations of the inner and outer free surfaces are derived from the Snell formula, and the internal and external free surface data are calculated by iterative method. A large angle secondary optical lens suitable for straight down LED flat lamp is designed and implemented. The results show that the double free surface large angle lens can distribute the LED 150 掳light at a large angle, the illumination uniformity is 0.86, and the energy utilization ratio is 99.5%. At different thickness, the distance to height ratio (D / H) of LED cell array with large angle quadratic optical lens is about 3, and the illumination uniformity on the target surface is above 0.88. By simulating the lighting effect of the new straight down LED flat-panel lamp, the result completely meets the national standard of building lighting design, and the number of LED used is 30% of the traditional direct-down LED flat lamp under the same power, which reduces the thickness of 20mm. The production cost of LED flat-panel lamp is greatly reduced.
【作者单位】：华侨大学信息科学与工程学院;福建省光传输与变换重点实验室;福建泉州世光照明科技有限公司;
【基金】：福建省科技计划重点项目(2013I0004) 光传输与变换福建省重点实验室开放基金(2014201) 南安市中小企业创新基金(201101) 南安市科技计划重点项目(G201212)资助项目
【分类号】：TM923.34

【参考文献】