LED点阵显示控制系统的设计方案

　　LED点阵显示屏具有运行可靠、安全、节能、成本低、使用方便等特点。本文讨论了基于单片机的LED点阵显示控制系统设计所用的各种方法，制作出一个以单片机作为控制单元的点阵显示屏。设计采用动态扫描的显示方法，选取74LS154和74LS595芯片分别构成行、列驱动电路,单片机通过行、列驱动电路，可对点阵显示模块单元进行行列信号控制，达到控制点阵显示屏正常显示汉字、图片信息的设计要求。

　　Abstract:

　　LED dot-matrix displays screen has characteristics of operation reliably, safety , energy conservation , low cost and easy to use and so on.After discussing the method which is used in the design of LED dot-matrix display and control based on MCU, a LED display system base on MCU was made.The display method of dynamic scanning was adopted, and 74LS154 and 74LS595 were used respectively in line/list drive circuit.Through the line/list drive circuit,the MCU could control the line/list signal of dot-matrix display module which made dot-matrix display screen to meet the requirement of displaying Chinese characters, images information.