32×64点阵式LED显示屏设计

32×64点阵式LED显示屏设计

I

摘要

LED显示屏是利用发光二极管点阵模块或像素单元组成的平面式显示屏幕。它是多个独立的LED发光二极管封装而成，LED点阵显示屏可以显示汉字、数字、符号等，通常用来显示文字、时间、速度、系统状态等。由于它具有发光率高、使用寿命长、组态灵活、色彩丰富以及对室内外环境适应能力强等优点，所以广泛应用于广告、证券、信息广播、新闻发布等方面，是目前国际上级为先进的显示媒体。

文章给出了一种基于AT89C52单片机的32 x 64点阵LED显示屏的设计方案。包括系统具体的硬件设计方案，软件流程图和C语言程序等方面。LED点阵显示屏是将要显示的汉字字模代码保存在某个存储空间，单片机通过读取字模并做相应的处理，然后以不同的显示方式显示在点阵屏上，主要适用于室内外汉字显示。在负载范围内，只需通过简单的级联就可以对显示屏进行扩展，是一种成本低廉的图文显示方案。

关键词： LED点阵屏 AT89C52 74HC595 行列驱动 32×64点阵式LED显示屏设计

II

Abstract

The LED display monitor is uses the light emitter diode lattice module

or the picture element unit composition plane formula screen. It is made of a

number of independent LED light-emitting diode package. LED dot matrix

can display Chinese characters, numbers, symbols. It usually used to display

text, time, speed, system status and so on. Because it has the luminosity

factor high, the service life long, the configuration nimble, the color rich as

well as to the room inside and outside environment adaptiveness strong and

so on the merits, therefore widely applies in aspects and so on advertisement,

negotiable securities, information broadcast, news issue, is the present

international higher authority for the advanced demonstration media.

This paper gives an dot matrix 32 x 64 LED display design based on

AT89C52 microcontroller.This system include specific hardware

design,software flow chart.a code language procedures and so on. LED dot

matrix display is to show the character font code stored in a storage

space,MCU read the font codes and make the appropriate treatment,then

show the font codes in different ways on the dot matrix display screen.It is

mainly used suitable for indoor and outdoor display.In the load range,this

system can be expanded the number of dot-matrix LED dot-matrix LED.So

this is a low-cost graphics display options.

Keywords: LED lattice screen, AT89C52, 74HC595, Line and column

driver 32×64点阵式LED显示屏设计

III

目录

摘要 ............................................................................................................ I

Abstract .................................................................................................. II

目录 ......................................................................................................... III

前言 ........................................................................................................... 1

1 绪论 ....................................................................................................... 2

1.1 LED显示屏的研究背景及经历过程 ......................................... 2

1.1.1 LED显示屏的优势 ............................................................... 2

1.1.2 LED显示屏的发展经历 ....................................................... 3

1.2 显示屏发展趋势 ......................................................................... 4

1.3 论文主要研究内容 ..................................................................... 5

1.4 论文的主要工作 ......................................................................... 5

2 LED和LED显示屏 ............................................................................. 6

2.1 LED .............................................................................................. 6

2.1.1 LED简介 ............................................................................... 6

2.1.2 LED优点 ............................................................................... 7

2.1.3 LED分类 ............................................................................... 8

2.2 LED显示屏 ................................................................................. 8

2.2.1 LED显示屏简介 ................................................................... 8

2.2.2 LED显示屏分类 ................................................................... 9

3 系统基本组成及元器件 ..................................................................... 10

3.1 系统基本组成 ........................................................................... 10

3.2 系统的主要元器件介绍 ........................................................... 11

3.2.1 AT89C52单片机简介 .......................................................... 11

3.2.2 74HC595简介 ..................................................................... 14

3.2.3 74HC138简介 ..................................................................... 16

3.2.4 74HC04简介 ....................................................................... 18

4 8×8点阵模块及驱动电路 ................................................................... 19

4.1 8×8点阵屏的内部结构及扫描原理 ......................................... 19