基于单片机的LED广告牌的设计.doc

郑州大学西亚斯国际学院 本科毕业论文 题 目 基于单片机的LED广告牌的设计 指导教师 XXX 职称 助教（硕士） 学生姓名 XXX 学号 20071522106 专 业 通信工程 班级 一班 院 （系）电子信息工程系 完成时间 2011年4月20日 基于单片机的LED广告牌的设计 摘　　要 LED点阵显示屏是利用发光二极管点阵模块或像素单元组成的平面式显示屏幕。它具有发光效率高、使用寿命长、组态灵活、色彩丰富以及对室内外环境适应能力强等优点。LED显示屏经历了从单色，双色图文显示屏到现在的全彩色视频显示屏的发展过程，自20世纪八十年代开始，LED显示屏的应用领域已经遍布交通、电信、教育、证券、广告宣传等各方面。 关键词：Based on LED Billboard Design SCM Abstract Destem is using light-emitting diodes dot matrix modules or pixel unit composed of a flat display screen【1】. It has high luminous efficiency, long service life, configure, flexible, rich color and for indoor and outdoor environment adaptiveness, etc【2】. The LED display experienced from monochrome, double-color graphic display to now full-color video screen development process, since the 1980s began, the LED display applications has already spread transportation, telecommunication, education, securities, advertising, etc.【3】 This design USES AT89C52 single chip as the main control module, use simple peripheral circuit to drive 16 x 16 lattice LED display. Design is divided into three modules: SCM control module. Output display module, 74LC138 decoder with triode driven driver modules. Single-chip microcomputer control module based on singlechip KEIL programming realization with software, signal output to drive 16 x 16 of LED dot matrix display piece for the purpose. On the other hand display widely used in hospitals, railway stations, Banks and other public places, so this design has a strong realistic practicability. This design is mainly by AT89C52 single chip computer as the core, and adopting the serial transmission, dynamic scanning technology, within the scope of the load, simply through simple cascade can expand on screen, is a low-cost graphic display solutions. KEY WORDS: LED,SCM,Dynamic scanning目　录 摘　　要 Ⅰ Abstract Ⅱ 1 前言 1 1.1 LED简介 1 1.2单片机的应用 2 1.3电子显示屏 2 2 系统总体方案 4 2.1 需要实