Micro-optical side-emitting light pipe can transform LED light from point source to linear source and it has the advantages of both LED and CCFL when used in LCD backlight module. In order to achieve good performance of light pipes with different lengths

this article

improves the light pipe model and introduces nonlinear correcting parameter

based on scattering netted dots formula

then the optimized dots arrangement of the light pipes with different lengths is presented. To solve the problem of low utilization efficiency in short light pipes

we radiate the light into one end of the pipe with the other end coated with reflective film

which significantly improves the light utilization efficiency. The results of simulation experiments show that the light utilization efficiency of the pipe can reach to 63% and the uniformity is up to 93%. This kind of light pipe can be used in LCD backlight module of large and medium sizes screen.