一种圆环LED侧入式背光模组设计

Design and simulation of circle module for edge LED back-light

侧入式背光板能有效地减少显示背光模组的厚度和背光所需的LED光源数目,为获得均匀照度的侧入背光模组,介绍一种圆环侧入式导光板结构。推导导光板中网点的设计规律,得到圆环侧入式导光板的网点大小的分布函数。利用VBA语言编程在CAD中生成网点分布,结合软件模拟分析,验证了导光板显示区域中光照亮度均匀性达到90%以上,满足了侧入式背光模组中圆环形导光板工程设计上的要求。

The light guide plate （LGP） with side lighting is effective to reduce the thickness of the display module and the number of the LED-lights. In order to obtain uniform surface illumination, a circle structure of light guide plate was introduced. Through deriving the rule of scattering netted dots, the distribution function for the size of scattering netted dots in light guide plate was obtained . Using VBA program, the scattering netted dots were generated in the CAD. Combined with the simulation software, it is verified that the luminance uniformity is more than 90% in the display area of guide plate, which meets the design requirements of back light module project.