LED点阵电子显示屏的设计与研制

论文编号:ZD1071    论文字数:13508,页数:42

摘  要
 在信息化时代中，LED电子显示屏以其亮度高、动态图文显示效果好、故障低、节能效果好、寿命特别长、显示内容多样、显示方式丰富、性价比高等优势，可用于各行各业中企业形象宣传、公共场所信息显示及户外广告，用于显示汉字、字符及图像信息。
 本次论文设计出一种比较简单的显示控制系统，解决了汉字显示的原理，显示屏显示控制的原理，及如何把显示数据通过显示控制电路转化成电频信号显示出来。具体为以AT89S52单片机为核心的LED点阵显示系统，利用简单的外围电路来驱动一块16×16LED点阵显示屏，实现汉字的左移和字母的上移这两种动态显示方式。采用该技术可以使我们进一步的了解显示屏的制作原理。
 
 
关键词： LED点阵显示屏、显示控制电路、单片机

Abstract
 In the information age, LED electronic display with its high brightness, dynamic graphic display, energy saving, particularly long life, display varied display rich, cost performance advantages, can be used in all walks of life in corporate image advertising, public places, information display and outdoor advertising, used to display Chinese characters, character and image information.
 This paper designed one kind of quite simple display control system.The system has solved the chart article screen Chinese character demonstration principle, the display monitor display control principle, and how turned into the demonstration data through the control rotary-inversion the electricity frequency signal to demonstrate. Specific as to AT89S52 microcontroller core LED dot matrix display system, using simple external circuit to drive a 16 × 16LED dot matrix display, to achieve these two dynamic display of Chinese characters moving from right to left and letters moving bottom to top. Using this technology to be possible to enable us the further understanding display monitor manufacture principle.

Keywords：LED dot matrix display, display control circuit, microcontroller

目 录
摘要……………………………………………………………………………………….…..….Ⅰ
Abstract…………………………………………………………………………………………Ⅱ
1 绪论……… ……………………………………………………………………………………1
 1.1  LED显示技术及分类…………………………………………………………….……1
 1.2  电子显示屏应用及市场前景……………………………………………………. ……2
 1.3  设计思路………………………………………………………………………………. 3
2 LED显示屏…………………………………………………………………………………...4
 2.1  LED发光原理………………………………………………………………….……. ..4
 2.2  LED显示特点…………………………………………………………………….……4
 2.3  工作原理……………………………………………………………………………..…6
    2.4  驱动方式……………………………………………………………………………..…6
3 汉字显示………………………………………………………………………………………8
4 具体器件的介绍……………………………………………………………….….…. .……10
 4.1  单片机AT89S52………………………………………………………………..…...…10
  4.1.1  主要性能……………………………………………………………………......10
  4.1.2  引脚及接口介绍………………………………………………………….....….11
        4.1.3  存储器结构……………………………………………………………….….…13
 4.2  74HC373…………………………………………………………………………..……13
 4.3  74LS138………………………………………………………………………….….….14
    4.3  8×8 LED点阵模块…………………………………………………………….…...…17
5 硬件电路设计……………………………………………………………….……………..…19
 5.1  总体设计……………………………………………………………………….….……19
 5.2  控制电路…………………………………………………………………….……….…19
 5.3  LED点阵连接…………………………………………………………………….……21
 5.4  Protues仿真……………………………………………………………………….……22
6 硬件电路制作………………………………………………………………………….……..23
 6.1  Protel99软件介绍……………………………………………………………….…...…23
 6.2  原理图文件……………………………………………………………………….….…23
 6.3  PCB文件………………………………………………………………………..….…..24
 6.4  焊接…………………………………………………………………………….…....….25
7 软件程序流程…………………………………………………………….……………....…. 26
 7.1  动态显示……………………………………………………………………..…....……26
8 结束语…………………………………………………………………….…………….….…. 28
致谢…………………………………………………………………….………...………...……...29
附录1 显示程序……………………………………………………………….…………..…...31