點陣顯示屏的設計與制作

電氣自動化論文編號:ZD1077    論文字數:20565,頁數:63

 
目 錄
摘要……………………………………………………………………………......………………I
1 緒論………………………………………………………….…………………………………1
2 設計方案…………………………………….……………….………………………………..3
2.1  總體思路…………………………….…….……………………………………….……3
2.2  系統硬件結構………………………….…….…………………………………….....…3
2.3  系統控制軟件流程…………………….….……………………………………...……..4
3  LED的工作原理…………...……….……….…………………………………………...5
 3.1  LED的發光原理………..………………..…………………………………………….5
 3.2  發光二極管的檢測………………………….……………………………………….…5
  3.2.1  萬用表檢測法……………………..…………………………………………….5
  3.2.2  外接電源檢測法……………..………………………………………………….6
4  LED點陣漢字顯示原理…………………….……………………………………………7
 4.1  圖文顯示屏的特點…………………………….…….…………………………………7
 4.2  漢字顯示原理……………………………….…….……………………………………7
  4.2.1  字模生成原理與方法……………………….…….…………………………….8
  4.2.2  字模提取程序………………………………….….………………………….....9
5  LED顯示屏驅動電路及其設計…………………………….……………………….…12
 5.1  LED模塊的驅動方式――掃描驅動…………………….…………………………….12
 5.2  設計原理及思路………………………………………….……………………………13
5.3  驅動顯示模塊的邏輯電路實現…………………………….…………………………15
 5.4  顯示單元板結構……………………………………….………………………………16
 5.5  單元板原理圖及特點…………………….……………………………………………16
6  顯示屏控制電路及其設計………………………...……………………………………...21
 6.1  顯示控制的邏輯電路實現…………………………………….…………………….…21
 6.2  控制板原理圖及特點………………………………….………….……………………21
7  性能檢測及分析…………………………………………….……………………………...25
 7.1  LED工作電流………………………………………….……………………………….25
8  控制系統顯示軟件………………………………….……………….…….………………26
 8.1  靜態顯示……………………..……….…………………………………….…………26
 8.2  動態左移顯示……………………………………………………………….…..…….26
 8.3  動態下移顯示……………………………………………………………….……..….27
 8.4  軟件調試…………………………………………………..…………………………..28
 8.4.1  程序上……………………………………..……………………………………29
 8.4.2  硬件器件上……………………………………………………………..………29
總結………………………………………………………………………………………….……30
致謝…………………………………………………………………………………………….....31
參考文獻…………………………………………………………………………………………32
附錄………………………………………………………………………………….……………33

摘  要

 在現代信息社會，通過宣傳媒介已成為人們獲取信息的一種主要手段。在諸多類型的宣傳媒體中，全彩色、高分辨率的LED大屏幕電子顯示屏具有色彩豐富、亮度高且可調、能夠進行插播和畫面編輯等突出的特點，正發揮著不可替代的作用，而點陣顯示技術是其中的關鍵技術。如何了解顯示原理及控制成了我們這個課題所要解決的目的。
 本次論文介紹了LED智能顯示屏的結構、驅動與顯示電路的組成，采用單片機來控制整個LED點陣電路。設計出了一種比較簡單的顯示控制系統，解決了圖文屏漢字顯示的原理和顯示控制的原理，以及如何把顯示數據通過顯示控制電路轉化成電頻信號顯示出來。對該漢字點陣顯示方法及點陣屏顯示電路的原理進行了詳盡的分析，并經過實踐證明：該驅動與顯示電路邏輯功能可靠，實際應用范圍廣。

關鍵詞： LED點陣顯示屏、單片機、驅動電路、顯示控制電路

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