体散射集成导光板是一种新型的液晶背光照明系统设计。基于多重米氏(Mie)散射理论和蒙特卡罗(Monte Carlo)顺序抽样方法,对该类型导光板进行了光线追迹模拟计算与仿真设计。研究了填充粒子材料、粒径、浓度及导光板几何结构等光学参量对输出光强面分布均匀性、照明角度等背光性能的影响,并进行了初步的实验验证及设计评估。研究表明,各光学参量十分敏感,且相互制约,必须进行大量的优化计算才能获得符合实际需要导光板设计方案。导光板输出光面分布的均匀度主要由填充粒子浓度决定,视角特性主要由导光板尺寸,特别是底面倾角决定,色散程度则主要和填充粒子的直径和折射率有关。

Ray-tracing simulation and simulating design for volume scattering integrated light guide plates are presented, with Monte Carlo sequential sampling method based on multiple Mie scattering theory. The effects of optical parameters, i.e. doped material, particle scale, concentration and geometrical structure of light guide plates, on the backlight performances, such as the output light intensity uniformity and illuminating angle, are considered, and primary verifying experiments and design evaluation are also presented. It is found that, the above parameters are sensitive and correlated, and plenty of optimizing simulation is necessary for light guide plate design scheme meeting practical demands. The uniformity of output light intensity is determined mainly by the deoped particle concentration, view angle by the light guide plate size and especially the scope angle of basal surface, and dispersion by the diameter of doped particle and refractivity, respectively.