点阵显示屏的设计与制作

论文编号:ZD1077    论文字数:20565,页数:63

摘  要

 在现代信息社会，通过宣传媒介已成为人们获取信息的一种主要手段。在诸多类型的宣传媒体中，全彩色、高分辨率的LED大屏幕电子显示屏具有色彩丰富、亮度高且可调、能够进行插播和画面编辑等突出的特点，正发挥着不可替代的作用，而点阵显示技术是其中的关键技术。如何了解显示原理及控制成了我们这个课题所要解决的目的。
 本次论文介绍了LED智能显示屏的结构、驱动与显示电路的组成，采用单片机来控制整个LED点阵电路。设计出了一种比较简单的显示控制系统，解决了图文屏汉字显示的原理和显示控制的原理，以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。对该汉字点阵显示方法及点阵屏显示电路的原理进行了详尽的分析，并经过实践证明：该驱动与显示电路逻辑功能可靠，实际应用范围广。

关键词： LED点阵显示屏、单片机、驱动电路、显示控制电路

Abstract

 In modern times of informational, has become the person through the propaganda medium to gain the information one main method. In many types’ propaganda media, entire colored. The high resolution LED large screen electron display monitor has the color to be rich. Brightness adjusts can carry on the emergency broadcast and the picture edition and so on the prominent characteristic. Is playing the role which cannot be substituted but the video frequency demonstration technology is essential technology. How to understood the demonstration principle and controlled the goal which this topic had to solve.
This article introduced LED intelligence display screen structure originally, and has driven the circuit moving and coming to control the entire LED lattice demonstrating circuital composition. Adopt the monolithic machine. System has designed out one kind of comparatively simple display under the control of. Have resolved the principle pursuing the principle and display under the control of that the Chinese character demonstrates, and how the signal demonstrating a data becoming electricity frequency by the fact that the display under the control of circuit changes has been demonstrated out. The principle showing to owing a Chinese character lattice the screen demonstrating method and the lattice a circuit has carried out detailed analysis. Has proven that and process practice: Should drive and demonstrate the circuit logic function reliably. The range reality is applied is broad.
Key word:  LED lattice display screen、 monolithic machine、 driver circuit、 display control electric circuit
 
目 录
摘要……………………………………………………………………………......………………I
1 绪论………………………………………………………….…………………………………1
2 设计方案…………………………………….……………….………………………………..3
2.1  总体思路…………………………….…….……………………………………….……3
2.2  系统硬件结构………………………….…….…………………………………….....…3
2.3  系统控制软件流程…………………….….……………………………………...……..4
3  LED的工作原理…………...……….……….…………………………………………...5
 3.1  LED的发光原理………..………………..…………………………………………….5
 3.2  发光二极管的检测………………………….……………………………………….…5
  3.2.1  万用表检测法……………………..…………………………………………….5
  3.2.2  外接电源检测法……………..………………………………………………….6
4  LED点阵汉字显示原理…………………….……………………………………………7
 4.1  图文显示屏的特点…………………………….…….…………………………………7
 4.2  汉字显示原理……………………………….…….……………………………………7
  4.2.1  字模生成原理与方法……………………….…….…………………………….8
  4.2.2  字模提取程序………………………………….….………………………….....9
5  LED显示屏驱动电路及其设计…………………………….……………………….…12
 5.1  LED模块的驱动方式――扫描驱动…………………….…………………………….12
 5.2  设计原理及思路………………………………………….……………………………13
5.3  驱动显示模块的逻辑电路实现…………………………….…………………………15
 5.4  显示单元板结构……………………………………….………………………………16
 5.5  单元板原理图及特点…………………….……………………………………………16
6  显示屏控制电路及其设计………………………...……………………………………...21
 6.1  显示控制的逻辑电路实现…………………………………….…………………….…21
 6.2  控制板原理图及特点………………………………….………….……………………21
7  性能检测及分析…………………………………………….……………………………...25
 7.1  LED工作电流………………………………………….……………………………….25
8  控制系统显示软件………………………………….……………….…….………………26
 8.1  静态显示……………………..……….…………………………………….…………26
 8.2  动态左移显示……………………………………………………………….…..…….26
 8.3  动态下移显示……………………………………………………………….……..….27
 8.4  软件调试…………………………………………………..…………………………..28
 8.4.1  程序上……………………………………..……………………………………29
 8.4.2  硬件器件上……………………………………………………………..………29
总结………………………………………………………………………………………….……30
致谢…………………………………………………………………………………………….....31
参考文献…………………………………………………………………………………………32
附录………………………………………………………………………………….……………33