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在直下式背光模组中,除了均齐度之外,光使用效率在背光模组也是很重要的考虑量,在此将直下式背光模组底部反射板改变构造,在每支灯管之间添加三角形的反射物,使光線经由三角反射物反射后,其角度与法線之夹角变小,进而导正光線的方向。将光線在三角反射物模组之追跡情形与统计强度分布到优化功能建立于程式中,以缩短模拟时程,同时对均齐度与光使用效率做优化,并与光学软体做比对验证,进而減少棱镜片之成本。在此优化32 inch 16:9面板,厚度2.5cm,灯管数目为10支之三角反射物背光模组,加上扩散板后,其最佳出光角度分布之半强角都在46°,均齐度也有控制在90%以上。根据本研究成果,一些光学膜片可以不置放于此新型背光模组中,将可大幅減少零组件之成本。
In the direct type backlight module, in addition to the uniformity, the light usage efficiency in the backlight module is also a very important consideration. In this case, the direct type backlight module bottom reflector will be changed in configuration, and between each of the lamps Add triangular reflector, so that the light reflected by the triangular reflector, the angle between the angle and the normal becomes smaller, and then guide the direction of the light. The distribution of the ray tracing and the statistical intensity distribution in the triangular reflector module to the optimization function is established in the program to shorten the simulation time history and to optimize the uniformity and the light use efficiency and compare with the optical software. Thus reducing the cost of the prism sheet. In this optimization 32 inch 16: 9 panel, the thickness of 2.5cm, the number of tubes for the 10 triangular reflector backlight module, with diffuser, the best half-angle of the light distribution angle at 46 °, both Qi degrees also have control over 90%. According to the research results, some optical films can not be placed in this new backlight module, which will greatly reduce the cost of components.