Design and Simulation of LED First Lens for Large Advertising Light Boxes
LI Jianpeng
GUO Zhenning
ZHANG Jianing
XUE Dongdong
CHEN Zhonghang
Abstract：To design the large rectangular LED advertising light box,the secondary lens and the LED must be combined in general,which easily make energy waste and form the terrible light distribution.What''s more,it''s difficult to form a rectangular uniform light field on the target surface,in the array of circular light fields.Based on the law of conservation of energy and the mesh generation method,a first lens for LED was designed to achieve a uniform rectangular light field.According to the mapping relations established by the law of conservation of energy,the mesh generation of the light source and the target surface was realized.Then,the snell law was combined with the iteration to solve the surface data of the first lens.The illumination uniformity of the LED array with the first lens on the target plane with a height of 100 mm was analyzed by the Lighttools simulation.The research showed that a rectangular light field with size of 600 mm×200 mm can be produced by the first lens for LED,and then the illumination uniformity value on the target plane was 91.54%,when the array distance of the LED first lens array was 300 mm×190 mm,which accord with the design standard of the large advertising light boxes.
Keywords：optical designadvertising light boxesLEDfirst lensrectangular light fielduniform illuminationdesignsimulation
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 86-90 )