集成化导光板下表面微棱镜二维分布公式探究

Two-dimensional distribution expressions of micro-prism on bottom surface of partial integrated light guide plate

集成化导光板下表面微结构分布设计是提高背光模组亮度均匀性的关键因素之一.本文提出了小尺寸集成化导光板下表面微棱镜二维分布公式,给出了微棱镜二维分布公式系数与导光板结构参数之间的关系表达式.将上述公式组直接应用于不同结构参数的小尺寸集成化导光板下表面微棱镜二维分布设计,无需借助设计人员的经验,可直接获得亮度均匀性较高时的集成化导光板下表面微棱镜二维分布,出射光亮度均匀性平均值可达84.94%.仿真结果表明,本文提出的微棱镜二维分布公式及系数关系表达式具有重要应用价值,极大地节省了集成化背光模组的设计优化时间,对于导光板表面微结构分布设计具有重要的参考价值.

The design of the microstructure distribution on the bottom surface of the partial integrated light guide plate(PILGP) is one of the key factors to improve the luminance uniformity of the partial integrated backlight module(BLM). In this paper, the two-dimensional micro-prism expressions on the bottom surface of the smallsized PILGP are presented. The two-dimensional micro-prism expressions make the micro-prisms spread out on a two-dimensional scale of the bottom surface of the PILGP. By fitting and analyzing a large number of simulation data, the relationship expressions between the coefficients of the two-dimensional micro-prism expressions and the structural parameters of the PILGP are established. The above expressions are directly applied to the two-dimensional distribution design of micro-prism on the bottom surface of small-sized PILGPs with different structural parameters. Without the help of the designers’ experience and the multiple simulations of the software, the average value of luminance uniformity in the partial integrated BLMs is obtained to be84.94%. The simulation results show that the two-dimensional micro-prism expressions and coefficient relationexpressions presented in this paper have important application value. Take the 5-inch partial integrated BLM for example. The two-dimensional distribution of the micro-prism on the bottom surface of the PILGP with high luminance uniformity can be obtained directly by using the above expressions. By fine-tuning the coefficients of two-dimensional micro-prism expressions, calculated by the coefficient relation-expressions, the utilization of light energy, illuminance uniformity and luminance uniformity of the partial integrated BLM respectively reach 90.69%, 88.02% and 92.17%, which meet the practical requirements. The optimization and design time of the partial integrated BLM are both greatly saved. Further, the two-dimensional micro-prism expressions on the bottom surface of the PILGP are analyzed and the physical mechanism is explained reasonably. This work is of significance for the distribution design of the microstructures on the surface of the LGP.