LED點陣顯示屏具有運行可靠、安全、節(jié)能、成本低、使用方便等特點。本文討論了基于單片機的LED點陣顯示控制系統(tǒng)設計所用的各種方法，制作出一個以單片機作為控制單元的點陣顯示屏。設計采用動態(tài)掃描的顯示方法，選取74LS154和74LS595芯片分別構(gòu)成行、列驅(qū)動電路,單片機通過行、列驅(qū)動電路，可對點陣顯示模塊單元進行行列信號控制，達到控制點陣顯示屏正常顯示漢字、圖片信息的設計要求。

　　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.