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1、 I摘 要 LED 点阵电子显示屏，制作简单、安装方便，被广泛应用于各种公共场合，如汽车报站器广告屏以及公告牌等，用于显示汉字、字符及图像信息。本文介绍的是一种可用在超市或宾馆等场合的 LED 点阵电子显示屏的设计。 本设计使用 AT89C51 单片机作为主控制模块，利用简单的外围电路来驱动6416 的点阵 LED 显示屏。根据题目设计要求，硬件部分主要包括时钟电路、复位电路、MC-51 单片机系统、显示模块、行列驱动电路以及+5V 稳压电源电路等。考虑到所需元器件的易购性，本设计使用了 88 的点阵发光管模块，组成 1664 发光点阵，待机时显示“测控 06” ，使用按键可实现“欢迎光临”四
2、个字的不同显示方式，整个过程是由单片机控制。本设计采用 C 语言编写程序，选择了软件分层次设计的方式， 有利于实现较复杂的算法和程序结构优化。 本系统不仅能够实现数字、字母、汉字等信息的显示，同时还可以实现信息的定时循环和转换、滚屏等功能。 关键词关键词：单片机 LED 显示器 动态显示 点阵字库 IIAbstract Electronic display screen of LED lattice is simple to make ,easy to install, and widely used in various public places, such as automobile s
3、tation reporter advertising screen devices, as well as bulletin boards,etc. It is used to display Chinese characters, Characters and image information. This paper introduces the design of electronic display screen LED lattice available in supermarkets or hotels. The design uses AT89C51 as a main con
4、troller, and depends on a simple external circuit to drive the 6416 LED display screen. According to the title of the design requirements, the hardware of the design is mainly composed of clock circuit, reset circuit, MC-51 single-chip systems, display module, the driving circuit of ranks, decoding
5、circuit, as well as stable +5 V power circuit, etc. Taking into account the need of the necessary components , the 16 16 LED dot-matrix is made up of four 88 LED dot-matrix.The design can realize different display modes of “Welcome to the“,which is controlled by the key. The whole process is control
6、led by MCU. The design uses the C language as the programming tool. The stratified design of software is in favour of achieving more complex algorithms and the optimization of the program structure. The system can be achieved not only numbers, letters, Chinese characters, such as information display
7、, but also the cycle of the timing information ,the convert and the function of flashing Scroll, etc. Key words: MCU LED displays Dynamic display Llattice Llibrary III目录 1 引言 . 1 1.1 市场背景 . 1 1.2 国内外发展现状 . 2 1.3 应用及发展前景 . 2 2 研究方案的论证 . 4 2.1 系统的总体设计 . 4 2.2 方案的比较和选择 . 4 2.2.1 显示单元的选择 . 4 2.2.2 显示屏控制方案 . 5 2.2.3 显示屏连接方案 . 5 2.2.4 点阵扫描方案 . 5 3 系统硬件设计 . 7 3.1 硬件电路设计 . 7 3.1.1 电源电路 . 7 3.1.2 复位电路 . 8 3.1.3 时钟电路 . 8 3.1.4 行驱动电路 . 9 3.1.5 列驱动电路 . 9 3.1.6 LED 点阵模块的选择 . 9 3.2 器件选择及工作原理 . 10 3.3 LED 阵列及工作原理 . 13 3.3.1 LED 点阵模块结构 . 13 3.3.2 LED 动态显示原理 . 14 4 系统软件设计 . 17 4.1 软件设计思想 . 17 IV4.2 开发工具及语言 .
