本文在此介绍部分容易混淆的重要视觉参数，为高质量LED显示屏设计提供依据，包括：亮度与感知亮度、灰度视觉感受、影响亮度的环境要素、色温的心理感受、色度校正、逐点校正、逐点色度校正、逐点校正的作用等，供大家参考。

Most of the LED customer can evaluate the quality of LED through such specifications as brightness, contrast, refresh rate, brightness uniformity, color uniformity. but even with same visual specification quality, there are still big differences among the LED screen. Some looks excellent and attractive, the others look normal and even dirty. Why? Are there some special concepts which are very important and influence the LED screen quality beside these specifications? The answer is "yes". This article intend to introduce the key factors which are neglected by most of LED screen Manufacturing Company. Like visual brightness, visual gray scale, mental feeling about color temperature, true color, dot correction, color calibration and color uniformity.