【摘要】 由于LED(发光二极管)具有寿命长、色域宽、功耗低和环保(传统的光源CCFL含有汞气)等特性,在背光模组中采用LED代替CCFL(冷阴极荧光灯)是一种趋势。采用单光源顶角入射结构设计一个5.08 cm(2 inch)液晶背光模组。针对LED作为点光源带来的亮度不均匀的问题,采用旋转LED的入射角度和区域分割设计的方法,有效地解决了LED液晶背光模组中存在亮斑和暗区等不良的现象。通过模拟实验,可以得到光源出射均匀度为80.06%的导光板。更多还原

【Abstract】 Since light emitting diode(LED) has the features such as long lifetime,wide spectrum,low power consumption and environmental friendly,LED is increasingly used to replace CCFL(cold cathode fluorescent lamp,whose light source contains mercury gas) as the light source in the backlight module.A 2-inch LED backlight module using the structure of single-source vertex angle incident was designed.Considering that the LED light source usually causes the uneven brightness because it is a point source,the methods of LED incident angle rotation and regional segmentation were adopted,and the phenomenon of uneven brightness existing in the LED crystal backlight module was effectively eliminated.The simulation result shows that the uniformity of the outgoing light reaches 80.06%.更多还原