液体封装LED汽车远光灯光学设计

使用一种导热性能好、粘度小、电绝缘性强、无腐蚀性的透明液体封装LED,研究其封装后的光学特性,以获得一种光效高、散热好、体积小的新型汽车光源.按照汽车用LED前照灯GB25991-2010配光要求,选用1 300 Lm的大功率白光LED光源,采用椭球面玻璃作为灯具基本外壳.用光学设计软件TracePro进行设计,通过调节光源在灯具内的位置,修改玻璃外壳形状,设计出了一款自投射式LED汽车远光灯.设计结果表明:以目前大功率白光LED光源技术,椭球面玻璃外壳直径在40～50 mm范围内的远光灯完全能满足国标要求,光能收集效率在86.5％以上.最后对制作灯具进行测试,照度值分布与仿真结果基本吻合.

Optical Design of LED Automotive High-beam Filled with Liquid

To get a new type of automotive light source with high efficiency, better heat dissipation and small volume, LED source filled with cooling, low-viscosity, non-corrosive, electrical insulating and transparent liquid was studied especially on its optical properties. According to GB25991-2010 regulation, high-power white LED of 1300 lumens was chosen as the light source, and ellipsoidal glass shell was chosen as its basic lamp shell. By adjusting position of light source and modifying the shape of glass shell, optical designing program Tracepro was used in designing one projection-type LED automotive source. The results shows that, at the present stage when 40~50 mm diameter glass shells are introduced, illumination distribution of this liquid lens can meet the requirement of GB25991-2010 regulation for high-beam. Energy collection efficiency can reach 86.5%. The illumination intensity of experimental testing is matched with this simulation results.