毕业论文LED显示屏.doc

I 摘要 LED 显示屏,发光二极管的英文缩写,简称 LED 。它是一种通过控制半导体发光二极管的显示方式,其大概的样子就是由很多个通常是红色的发光二极管组成, 靠灯的亮灭来显示字符。用来显示文字、图形、图像、动画、行情、视频、录像信号等各种信息的显示屏幕。本次设计的全称为 16x32 的LED 点阵显示牌。本文介绍了采用 89C51 单片机作为主要控制模块的 LED 显示牌的动态设计。通过该芯片控制一个行驱动 74LS154 和列驱动器 74HC595 来驱动显示屏显示,使用单片机汇编语言进行编程,使其能够显示文字和单色图像。本文将介绍该方案的硬件设计思路,硬件电路各个部分的功能, 原理以及程序设计等。关键词: LED 点阵显示屏; STC12C5A60S2 ;74HC595 ;74LS154 摘要毕业设计论文 II Abstract The LED display, light emitting diode English abbreviations, abbreviation LED. Itisasemiconductor emitting diode bycontrolling the display mode, its appearance isprobably bymany usually red position, rely ontokill bright lights display character. Used todisplay text, graphics, images, video, animation, prices, the video signal etc all kinds ofinformation ofthe display screen. The design ofwhole called 16x32 ofLED dot matrix XianShiPai. This paper introduced the 89C51 microcontroller asthe main control module LED XianShiPai dynamic design. Through this chip control aline drive 74LS154 columns and drive 74HC595 todrive the screen shows, sothat itcan show text and monochrome images. This paper will introduce the scheme ofhardware design, hardware circuit each function of, principle and program design, etc. Key words :destem, STC12C5A60S2, 74HC595, 74HC154 III 目录摘要........................................................................................................................................ I 绪论........................................................................................................................................ 1 第1章前言........................................................................................................................ 2 LED 电子显示屏概述............................................................................................... 2 LED 的简介........................................................................................................ 2 点阵的概述.....................................................................................................