摘　　要

　　　LED（Light Emitting Diode）行業(yè)作為一個已經(jīng)成熟的產(chǎn)業(yè)，市場空間巨大，應(yīng)用前景廣闊。通過對LED技術(shù)的基本應(yīng)用的研究可以進(jìn)一步強(qiáng)化自身的專業(yè)技能和強(qiáng)化自己的動手設(shè)計(jì)能力。LED的特色之處一是節(jié)能（直接功耗，間接耗能），二是基本無電離輻射，三提高空間利用率。然而LED點(diǎn)陣顯示屏的特點(diǎn)不僅僅于此，LED點(diǎn)陣顯示屏用的是數(shù)碼管，而數(shù)碼管具有實(shí)用,便宜等優(yōu)點(diǎn)。做出來的LED點(diǎn)陣顯示很耐用。LED點(diǎn)陣顯示屏之所以受到廣泛重視而得到迅速發(fā)展，是與LED顯示屏本身所具有的優(yōu)點(diǎn)分不開的。LED點(diǎn)陣顯示屏的發(fā)展前景極為廣闊，目前正朝著更高亮度、更高耐氣候性、更高的發(fā)光密度、更高的發(fā)光均勻性，可靠性、全色化方向發(fā)展。本文介紹了基于單片機(jī)STC12的16×16LED點(diǎn)陣漢字滾動顯示屏的設(shè)計(jì)。其中著重介紹了LED點(diǎn)陣顯示的硬件設(shè)計(jì)思路、硬件電路各個部分的功能及原理、相應(yīng)軟件的程序設(shè)計(jì)，以及詳細(xì)的工作流程和使用說明。

　　　本文分為六部分，其中主要內(nèi)容是系統(tǒng)總體分析，系統(tǒng)硬件設(shè)計(jì)，系統(tǒng)軟件設(shè)計(jì)三部分。系統(tǒng)總體分析是基礎(chǔ)；系統(tǒng)硬件設(shè)計(jì)是本文的關(guān)鍵及核心部分，該部分首先簡單描述系統(tǒng)硬件工作原理，且附以系統(tǒng)硬件設(shè)計(jì)框圖，論述了本次畢業(yè)設(shè)計(jì)所應(yīng)用的各硬件接口技術(shù)和各個接口模塊的功能及工作過程；軟件設(shè)計(jì)是系統(tǒng)運(yùn)行必不可少的部分。本文撰寫的主導(dǎo)思想是軟、硬件相結(jié)合，以硬件為基礎(chǔ)，來進(jìn)行各功能模塊的設(shè)計(jì)。本設(shè)計(jì)實(shí)用性強(qiáng)、操作簡單、擴(kuò)展功能強(qiáng)。本此設(shè)計(jì)的顯示屏的設(shè)計(jì)具有體積小、硬件少、電路結(jié)構(gòu)簡單及容易實(shí)現(xiàn)等優(yōu)點(diǎn)。

關(guān)鍵詞：單片機(jī)  LED  點(diǎn)陣  漢字顯示

The Design of LED advertising screen Based on SCM

Abstract

LED (Light Emitting Diode) industry as a mature industry, the market is huge,  the application prospects is broad.Through the application of LED technology, the basic research could further strengthen our professional skills and strengthen our hands design capabilities.One special feature at the LED energy (power direct, indirect energy consumption), the second is almost no ionizing radiation, three improved space utilization.However, the characteristics of LED dot matrix display is not only here, LED dot matrix display using a digital, and digital tube has a practical, cost advantages.LED dot matrix display made out of very durable. LED dot matrix display by the wide attention and rapid development, with the LED display itself has the advantage inseparable. LED dot matrix display is extremely broad prospects for development, the current is moving higher brightness, higher weather resistance, higher luminous density, higher luminous uniformity, reliability, full color direction.This article describes the microcontroller-based STC12 of 16×16LED dot matrix character scrolling display design. Which focuses on the LED dot matrix display hardware design ideas, the hardware circuit functions of various parts and principles corresponding software program design, and detailed workflow and instructions for use. 

This paper is divided into six parts, of which the main contents of the overall system analysis, system hardware design, system software design three parts. Overall system analysis is the foundation; system hardware design is the key and core part of this paper, this section first briefly describe the system hardware works, and attached to the system hardware design diagram, discusses this graduation design applications and in all of the hardware interface technology Interface module functions and working process; software design is an essential part of system operation. The main idea of this writing is soft and hardware combination, hardware-based, for each functional module design. The design of practical, simple, powerful extension. The display is designed with a small, less hardware, circuit structure is simple and easy to implement.

Key Words：LED; Lattice; Chinese character demonstrates

目　　錄

摘　　要 1

Abstract 2

引　　言 4

1 LED顯示屏的介紹 5

1.1LED顯示屏的發(fā)展背景及國內(nèi)外研究現(xiàn)狀 5

1.1.1LED顯示屏的特點(diǎn) 6

1.1.2 LED顯示屏的動態(tài)掃描 8

1.2LED顯示屏的分類 8

1.2.2按使用方向分類 8

1.2.2按使用場合分類 9

1.2.3按發(fā)光點(diǎn)的直徑分類 9

1.3LED顯示屏的顯示方案 9

1.4LED的作用及市場前景 10

1.4.1 LED顯示屏的作用 10

1.4.2LED的市場前景 10

2系統(tǒng)的總體設(shè)計(jì) 10

2.1設(shè)計(jì)目標(biāo)及采取的方案 10

2.1.1設(shè)計(jì)目標(biāo) 10

2.1.2采取方案 11

2.2工作原理 11

2.3總體設(shè)計(jì) 12

3系統(tǒng)硬件設(shè)計(jì) 13

3.1各部分電路功能說明 13

3.2AT89C51芯片的簡要介紹 15

3.3時鐘電路的設(shè)計(jì) 17

3.4復(fù)位電路 18

3.5行驅(qū)動電路 19

3.6列驅(qū)動電路的設(shè)計(jì) 21

3.7電源電路的設(shè)計(jì) 22

3.8LED顯示器的設(shè)計(jì) 22

3.8.1點(diǎn)陣式LED顯示屏設(shè)計(jì) 22

3.8.2LED電子顯示屏顯示字符原理 23

3.9 漢字顯示原理 24

3.9.1LED顯示屏電路的設(shè)計(jì) 25

4系統(tǒng)軟件的設(shè)計(jì) 27

4.1 主程序設(shè)計(jì) 27

5 系統(tǒng)制作與調(diào)試 31

5.1 Proteus軟件簡要介紹 31

5.2 仿真過程 33

5.3 硬件制作與調(diào)試 33

5.3.1 硬件電路板的制作 33

5.3.2 系統(tǒng)硬件調(diào)試 34

5.4 系統(tǒng)軟件調(diào)試 34

結(jié)　　論 36

參 考 文 獻(xiàn) 37

附 錄 38

外文資料原文 38

外文資料譯文 44

在 學(xué) 取 得 成 果 49

致　　謝 50