单片机LED三文动态信息显示系统 第2页
基于单片机的LED三文动态信息显示系统
学科名称：测试计量技术及仪器
作者姓名：郝振华签名：
教师姓名：刘月明副教授签名：
论文摘要
SUBJECT:LED THREE-DIMENSION DYNAMIC DISPLAY SYSTEM OF
INFORMATIONG WITH SINGLE-CHIP MICROCOMPUTER
Discipline:Measurement Technologies and Instrumentations
Author:Hao Zhenhua Signature:
Advisor:Liu Yueming(Associate-Prof)Signature:
Defense Date:March 2006
Abstract
The display technology of LED(Light Emitting Diodes)is a new modern technologysynthesizing photo-ectricity,computer and control etc.It combines closely with traditional advertising and becomes a new media instrument for propaganda,and is widely applied to the information displaying and advertising in public place,such as
exhibition centre,financial market,stadium,airport,quay,station etc.The LED display system is composed of display module,controller and computer used to implement the characters inputting and the display mode selecting.The system can show Chinese and English as well as figure symbols appointed by users.Due to the diversities of the display mode and ideal visual feelings,LED display system is welcomed by users and becomes a new type of scientific product with
high-speed development in recent years.Normally the LED display system is complicated and could be controlled nearby as well as the maintenance of the equipment is insufficient,thus the applications of LED display system receive a great restriction especially in remote control and synchronous transmissi on,so this technology needs further
development and improvement.The LED displaying system of character symbols is studied in this paper.A detailed
review is given to the actuality and developing trends of LED display screen,and a new structure plan on the LED di splay screen of three-dimension dynamic LED lattice controlled by microcomputer is presented,which aims at overcoming the problems in current display systems.Instructions and information can be input by simple and
convenient man-machine interactive conversations,and the long-range control of display module can be realized,at the same time the display contents can be renewed at any mo ment and the omni-directional spatial stereoscopic display could be achieved.Theflow of software and the design plan of the circuit are given detailedly from the information picking-up on computer to the ou tput of ultimate screen display.Further more,corresponding methods are discussed according to the specific technical difficulties of LED display system.
Key words:Chinese character lattice,serial communication;single-chip computer;Visual Basic 6.0,stepmotor
LED(Light Emitting Diodes)显示技术是指将光电、计算机以及控制等相关内容综合于一体的现代新技术。它与传统的广告宣传紧密结合成为一种新的媒体宣传工具，广泛应用于展览中心、金融市场、体育场馆、机场、码头、车站等公共场所的信息显示和广告宣传。LED显示系统主要由显示模块、控制器以及完成文字录入和显示模式选择的计算机三个部分组成。该系统既可以显示中文、英文，也可以显示用户指定的图形符号。
LED显示系统由于显示方式多样和视觉感受理想而倍受用户的欢迎，也是广告宣传中近年来高速发展的新型科技产品。但是由于其系统配套复杂，控制显示内容只能就近完成，设备文护不够便利，使得LED显示屏的应用场所受到很大限制，特别是不能实现远程控制和同步信息传递，这些都要求该技术的进一步完善和提高。本文是针对只显示文字符号的LED显示系统而进行研究的。首先，详细介绍了国内外LED显示屏的发展与现状，并针对当前显示系统所存在的问题，提出了一种实现微机控制的三文动态LED点阵显示系统的新方案。可以通过简单、方便的人机对话窗口来输入指令，实现对显示模块的远程控制，做到可以随时更新显示内容和实现全方位的空间立体显示。论文中从上位机汉字字模点阵信息的提取开始，到上下位机之间的串行通信，以及显示系统中步进电机的控制和信息显示的最终实现，都详细的给出了软件流程和电路设计方案，并根据设计中的具体技术难点讨论了相应的解决方法。
关键字：汉字点阵，串行通信，单片机，VB6.0，步进电机Abstract
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