基于51单片机的LED点阵屏显示设计毕业设计说明书摘要

基于51单片机的LED点阵屏显示设计
摘要
LED显示屏是一种通过控制半导体发光二极管的显示方式，它是由很多个红色的发光二极管组成，靠灯的亮灭来显示字符。

LED显示屏分为数码显示屏、图文显示屏和视频显示屏，均由LED矩阵块组成。

目前由于LED显示屏造价昂贵，主要应用于比较高档的场所，主要集中在城市的繁华场所，在正在举办的展览会、未来各项大型运动赛事等新增需求，都将促使LED显示屏的大规模发展。

此外，已架设的大型LED显示屏幕每10年将历经一次换机潮，随着人们生活水平的提高，户外LED显示屏将逐渐应用于各个行业。

本文介绍了一款以单片机AT89S51为控制器的LED点阵显示屏系统的设计。

该系统选用四块8×8点阵模块构建一个16×16的LED点阵屏，可实现中英文字符的显示及其动态特效显示。

选定AT89S51单片机为核心控制器件，由串并转换器和锁存器为译码电路器件，三极管和驱动继电器为驱动电路器件，通过级连的方式来扩大显示屏幕的尺寸以达到增加显示内容的目的。

AT89S51单片机处理控制命令以及显示代码，将显示内容通过I/O口串行输出并且控制译码电路完成串并转换并行输出，最后由显示驱动电路模块驱动LED点阵显示屏的扫描显示。

整个设计采用AT89S51做核心控制器，74LS164和74LS373组成译码电路，三极管8550和ULN2803做行和列驱动。

关键词:AT89S51，LED，显示屏，半导体
LED Dot Matrix Display Design Based on SCM
Abstract
LED display is the display mode controlling by the semiconductor light emitting diode, it probably looks like that composition by a number of led is usually a red light-emitting diodes which show character by the LED on and off. LED display is divided into Digital display, Graphic display and Video display, which is compositioned by LED matrix block. As the cost of LED display expensive currently, mainly used in relatively high places, concentrated in the cities bustling place , being held in the Shanghai 2013, Future large-scale sporting events and other additional requirements will promote large-scale development of LED display. In addition, the original large-scale LED display screen will be updating once per 10 yea rs, with the improvement of people’s living standard, outdoor LED display will gradually be used in various industries.
This paper introduces a design of the LED lattice display system base on MCU AT89S51. This system chooses four 8 x 8 bitmap module to construct a 16 x 16 of LED dot matrix screen.The system can display in both Chinese and English
characters of the show and from top to bottom and move around the magic show. Selected for the core control device AT89S51, the string and converter and latches to decode circuits, transistor and drive relays for driving circuit devices, through the ways to expand level even display screen size in order to achieve the purpose of increasing display content.AT89S51 processing control commands and display code will display content through the I/O port serial output and control of decode logic complete and transfer parallel output, finally by display driver circuit module driver destem scanning display. The whole design USES AT89S51 do core controller, 74LS164 and 74LS373 composition decode circuit, triode 8550 and ULN2803 do rows and columns driver
Keywords: AT89S51 ,LED ,Display ,Semiconductor。