浅析某型号LED电子显示屏的印制板电磁兼容性改进

摘要

LED电子显示屏有着特殊构造方式，它不可避免地会向空间辐射电磁波。文章通过对LED电子显示屏电路印制板进行分析，分别从走线原则、接地以及分割几点改进印制板的电磁兼容性，对LED电子显示屏进行电磁辐射实际的测量，分别将改进前和改进后的测量结果进行分析。%The special construction of LED electronic display screen inevitably leads to electromagnetic radiation. This paper points out that the electromagnetic compatibility of the printed circuit board can be improved from three perspectives: the circuit layout principles, the earthed circuit, and the circuit partitioning. These suggestions are made on the basis of an analysis of the printed circuit board of LED electronic display screen, and an analysis of the results of the pre- and post-test of the electromagnetic radiation of LED electronic display screen before and after the improvement.