基于at89c52单片机的led点阵广告牌的设计与制作大学学位论文.doc

　　　　　　 本科毕业论文（设计） 题目: 基于AT89C52单片机的LED点阵广告牌的设计与制作 院 系：物电系08级电信（1）班 专 业：电子信息科学与技术 姓 名： 学 号： 指导教师： 教师职称： 填写日期：2011 年 12月 20 日 摘 要 对于这个设计，我用的主控模块是AT89C52，T89C52，HC595， 关键词：AT89C52；控制模块；点阵广告牌；驱动电路；外围电路 Abstract For this design, I use the main control module is based on AT89C52 and drive the 8 * 8 dot matrix type billboard is driven by some simple peripheral circuits, in this design, we not only use the AT89C52, four 74HC595. These four chip is used as the 8 * 8 dot matrix drive, and ultimately to achieve the target is is able to achieve: I wish you a pleasant journey! This several Chinese characters to the left of the process, that is, the overall circuit can be roughly classified as two, one is the external circuit, one is the drive circuit. The two circuits can together to achieve a 8 * 8 dot matrix billboards and in the human eye observation, billboard highlights are able to display brightness uniformity, no glare, can display graphics and text. Not only that, the text is still very stable, especially clear without disturbance. The display mode has to move in and out of. Finally, programming is very convenient, data transmission function can achieve a series of single-chip computer and computer peripheral storage devices. And can use the software to simulate the change of its content. From the other point of view, LED dot matrix is a new type of display device, which is composed of a plurality of diodes. By controlling the Led bright lights to control what I need to display graphics and text.. Keywords: AT89C52; control module; dot matrix advertisement board; driving circuit; peripheral circuit 目 录 第一章 前 言 4 第二章 点阵的概述 5 第一节 功能要求 5 第二节 关于LED的了解 5 一、LED点阵显示系统简介 5 二、LED点阵显示系统的主要特点 5 三、LED点阵显示屏的分类 5 四、8*8点阵内部电路图 6 第三节 方案论证 6 （一）点阵探究 6 （二）扫描规律 7 第三章 方案比较 8 第一节 LED点阵广告牌的设计一般有两种方案： 8 第二节 电源的选择与论证 8 第三节 点阵信息提取方案 8 第四节 显示驱动电路 9 第四章 系统总体设计方案