LED视角亮度关系及其对显示屏亮度均匀性的影响分析

LED显示屏的均匀性有诸多因素决定,其中亮度均匀性是影响视觉效果的最主要因素。在分析亮度均匀性的过程中发现,LED管发光特性所决定的其在沿光轴方向上光强最强,沿发光面向四周光强逐渐减弱,因此,以LED管为基本像素构成的LED显示屏在法线方向上的亮度也最高,当偏离法线方向时亮度会不同程度的降低,这样由于LED管的性能参数及制造工艺等的影响使LED显示屏出现麻点、马赛克等亮度不均匀现象。本文以LED单管和单元箱体为研究对象,通过实验得出了LED视角与亮度的变化关系,深入分析了影响LED显示屏亮度均匀性的原因,并对亮度数据的采集方法以及生产过程中须注意的问题提出了相关建议。

Analysis about the Relationship between LED Visual Angle and Luminance and the Influence of Which on LED Display Luminance Uniformity

Among the factors which effect LED display panel uniformity, luminance uniformity is the key one. The characteristic of LED shows that its luminance is the strangest along the optical axis direction, and around it, the luminance is weakened. So the luminance of LED display panel is strangest along the normal direction, when the deviation from the normal direction, brightness will be reduced at different levels. Because of the LED manufacturing process and performance parameters, there are some mosaics of uneven brightness in the LED display panel. In this paper, to get the relations between LED luminance and visual angle, we take the LED single-tube and LED display module as the object to study. In-depth analysis the reasons which impact the LED display brightnessuniformity, then, gave some advice to the collection method of LED luminance data and some problem which need to pay attention to in the product processes.