LED显示屏控制技术与硬件电路设计.docx

1、LED显示屏控制技术与硬件电路设计LED显示屏控制技术与硬件电路设计摘 要当今世界，电子技术迅猛进展，点阵式显示器件作为现代信息显示的重要媒体，在金融证券、体育、机场、交通、商业、广告宣传、邮电电信、指挥调度、国防军事等许多领域中得到了广泛应用。因此点阵式显示器件的研制、生产也的到了迅速的进展，并逐步形成产业，成为光电子行业的新兴产业领域。由于LED电子显示屏具有所显内容信息量大,外形美观大方,操作使用方便灵活.适用于火车,汽车站,码头,金融证券市场,文化中心,信息中心体育设施等公共场所.该项目广泛涉及了运算机及电子技术中的电源技术,单片机技术,数据通讯技术,显示技术,储备技术,系统软件技术,

2、接口及驱动等技术.我国经济进展迅猛,对信息传播有越来越高的要求.能够相信,LED电子显示屏以其色彩鲜亮夺目,大的显示信息量,寿命长,耗电量小,重量轻,空间尺寸小,稳固性高,易于操作,安装和爱护等特点,将在社会经济进展中扮演越来越重要的角色。利用单片机对整个系统进行总体操纵，进行显示所要显示的字符。显示方式分为三种：逐字显示、上滚显示、左滚显示，其中显示字模数据由单片机输入显存，点阵的点亮过程有程序操纵，由驱动电路完成，点阵采纳单色显示，该显示器电路的特点是：点阵的动态显示过程占用时刻比较短，亮度比较高，而且亮度能够改变电阻进行调剂。本文以Proteus为软件平台，设计制作一套51系列单片机实验

3、系统。【关键词】单片机 点阵 LED电子显示屏AbstractIn todays world, the rapid development of electronic technology, dot-matrix display device as a modern information display of the important media, in the financial securities, sports, airport, transportation, commercial, advertising, post and telecommunications, comman

4、d and control, national defense military, and many other areas have been widely applied. So dot-matrix display devices in the development, production and to the rapid development, and gradually formed a optoelectronics trade industry, the new industry fields. Because LED electronic display has shown

5、 informative content, a beautiful appearance, convenient in operation is flexible. Apply to the train, bus station, wharf, financial securities market, cultural center, information center sports facilities in other public places. This project involves a wide computer and electronic technology of pow

6、er technology, single chip microcomputer, data communication technology, display technology, storage technology, system software technology, interface and drive technology. Chinas economic development of information transmission has rapidly, and more and more high requirements. Can believe that LED

7、electronic display by its color bright is dazzing, large display information, long life, small power consumption, light weight, small size, high stability, space, easy to operate, installation and maintenance and other characteristics, in the social economy development will play more and more import

8、ant role. Using single chip computer in overall control of the whole system, display should show the characters. Display mode is divided into three types: word for word display, rolling display, left, which shows that font that roll of microcomputer data input the video memory, bitmap lightened proc

9、ess has program control, by driving circuit is completed, the monochromatic show that the dot matrix display circuit features are: dot matrix the dynamic display of the process take time is short, brightness is higher, and brightness can change resistance on the adjustment.In this paper, the softwar

10、e platform, Proteus for design a set of 51 series SCM experiment system.Keywords: SCM lattice LED electronic display 一引言3二LED概述41.LED电子显示屏概述42.LED电子显示屏的分类4三系统概述71.整体结构72.单片机系统作用及应用73.进展趋势8四LED显示屏操纵技术状况101.串行传输与并行传输技术102.动态扫描与静态锁存技术103.自动检测及远程操纵技术10五硬件电路设计111.总体设计112.系统硬件选择123.系统硬件概述124.LED点阵的内部结构及工作

11、原理135.系统总体电路图156.硬件焊接15六软件设计171.程序设计总体思路172.程序流程图173.各模块程序设计18七系统的硬件及软件调试20总结22致谢23参考文献24附录引 言LEDLight Emitting Diode，发光二极管，简称LED，是一种能够将电能转化为可见光的固态的半导体器件，它能够直截了当把电转化为光。LED的心脏是一个半导体的晶片，晶片的一端附在一个支架上，一端是负极，另一端连接电源的正极使整个晶片被环氧树脂封装起来。半导体晶片由两部分组成，一部分是P型半导体，在它里面空穴占主导地位，另一端是N型半导体，在这边要紧是电子。但这两种半导体连接起来的时候，它们之间就形成一个P-N结。当电流通过导线作用于那个晶片的时候，电子就会被推向P区，在P区里电子跟空穴复合，然后就会以光子的形式发出能量，这确实是LED发光的原理。多个 LED发光灯组成固定的字符或图形进行显示，即形成LED点阵图文显示屏。其要紧特点是只操纵LED点阵中各发光器件的通断发光或熄灭，而不操纵LED的发光强弱。LED点阵的汉字显示方式是先依照所需要的汉字提取汉字点阵如88点阵，将点阵文件存入ROM，形成新的汉字编码；而在使用时那么需要先依照新的汉字编码组成语句，再由MCU依照新编码提取相应的点阵进行汉字