LED 显示屏设计

论文编号:ZD791    论文字数:19449,页数:45

摘  要

 LED显示屏是在信息领域里广泛应用的工具，本文首先介绍了我国LED显示屏的发展现状，以及LED显示屏的发展历史，并且从多个方面分析了LED显示屏的发展前景。
 第二章中主要介绍了LED器件的工作原理和LED器件的主要参数，然后又介绍了LED器件的几种驱动电路。
 而设计的主要内容是硬件的选择和软件的编译，从而实现显示屏的显示功能，本系统是以单片机的基本语言汇编语言来进行软件设计，指令的执行速度快，节省存储空间。为了便于扩展和更改，软件的设计采用模块化结构，使程序设计的逻辑关系更加简洁明了。使硬件在软件的控制下协调运作。
 正文中第三章简单描述系统硬件工作原理，且附以系统硬件设计框图，论述了本次毕业设计所应用的各硬件接口技术和各个接口模块的功能及工作过程, 并具体描述了8051、8031的硬件结构图和管脚功能。对TI公司的TPIC6B595进行了详细的介绍。其次阐述了程序的流程和实现过程。本文撰写的主导思想是软、硬件相结合，以硬件为基础，来进行各功能模块的编写。
 最后对我所开发的用单片机实现LED显示屏控制原理的设计思想和软、硬件调试作了详细的论述。

关键词：显示屏；单片机；驱动电路；

THE DESIGN OF the LED DISPLAY

Abstract

 LED display is widely used in the field of information technology (IT). This paper first introduced the present domestic development of LED display, and its historical development, then analyzed the future in many-sided ways.
 The chapter 2 mainly introduces the details of LED and their principles and major parameters, then gives some driving circuits.
While the chief content rest to selecting hardware and to compiling the software to accomplish the functions of the display. The software is compiled by assembler language, whose instruction is fast executed, saving the space of storage. In order to make it convenient to extend or revise, the software is designed in cube mode. In this way, the logic relation of the program becomes briefer and clearer, and hardware can performance coordinately under the software’s control.
The third chapter of the content describes the working principle of the hardware, enclosing the bloke diagram of the system designed. And then discusses the technology of each access and the function and process of work of the cubed access, following the description of the pins and hardware structures of 8051 and 8031 MCU. Finally the TPIC6B595 of TI Corporation is introduced and the procedure and achievement of the program are stated. The main ideology of the contest is to combine the software and the hardware together, the latter compiled under the functions of the former which is the base.
At last, the paper detailed discusses the ideology and the test of the software and hardware of the LED display which is exploded to achieve in the MCU methods.
Key words: display; MCU (microcomputer unit); driving circuit

 目 录
摘要 ……………………………………………………………………………...I
Abstract…………………………………………………………………………..Ⅱ
第1章 引言……………………………………………………………………...1
 1.1LED显示屏的发展及现状…………………………………………………...1
1我国LED显示屏的发展历史………………………………………… 1
        1.1.2我国LED显示屏的发展现状………………………………………… 2
 1.21LED显示屏研究的目的和意义……………………………………………..4
 1.2.1课题研究的目的…………………………………………………….. 4
 1.2.2课题研究的意义…………………………………………………….. 5
第2章 LED器件工作原理………………………………………………………  6
 2.1半导体发光基本原理……………………………………………………….6
 2.2LED器件的参数……………………………………………………………7
 2.3LED器件的驱动……………………………………………………………9
 2.4LLED器件使用注意事项………………………………………………….. 13
第3章 LED点阵图文显示屏…………………………………………………14
 3.1LED显示屏的特点…………………………………………………………14
 3.2LED显示屏的基本结构…………………………………………………….15
 3.3LED显示屏的硬件设计…………………………………………………….17
    3.3.1 单片机概述…………………………………………………………17
 3.3.2RS232串口…………………………………………………………..24
     3.3.3显示屏驱动电路……………………………………….…….27   

3.3.4用TPIC6B595构成LED显示屏……………………………………... 30
第4章 LED显示屏软件设计……………………………………………………. 32
 4.1软件设计思想……………………………………………………………..32
 4.2显示屏程序清单…………………………………………………………...33
 4.2系统程序流程图………………………………………………………….. 40
致谢……………………………………………………………………………..42
参考文献………………………………………………………………………..43
附录……………………………………………………………………………. .45

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