改善全彩LED显示屏对比度的选择性滤光片设计方法

摘要

Environmental stray light will significantly reduce the LED display contrast. This paper presents a method by adding an interference filter in front of the screen. The RGB tri-color light pass through the filter, but the stray light has been reflected, the contrast of the display enhanced thereby. A mathematical model of the RGB emission spectra and an evaluation function of the filter design were given. The design method and process were given in detail. An example of the design results was provided.%环境杂散光会显著降低LED显示屏的对比度，本文提出在全彩屏前增加一个干涉滤光片的方法，选择性地透过RGB三色光，杂散光却被反射，从而提高显示屏的对比度。文章提出了RGB发射峰的数学模型和滤光片设计的评价函数，给出了详尽的设计方法、步骤和一个例子的设计结果。