LED点阵广告牌系统设计_毕业设计.doc

LED点阵广告牌系统设计
摘要
随着LED技术日趋成熟,在汽车、广告、日常生活等诸多领域都可以看见LED点阵显示屏的身影,目前高亮度LED已可以产生红、绿、蓝三原色的光,可以组成大型单色、双色和彩色LED显示屏,常见的应用是文字显示及气象预报图像,另外,也盛行使用LED显示屏作为广告招牌。因此,LED在各个领域有广泛的应用。
本文介绍了一种基于单片机的LED点阵广告牌系统,系统是以AT89S51单片机为核心实现LED点阵汉字的显示。本文分别从硬件设计和软件实现给予详尽的描述。硬件部分由行驱动模块、列驱动模块以及LED点阵显示模块组成;软件部分采用简单流通性强的C语言编程,实现不同的显示方式、显示不同的点阵汉字、调速。此LED点阵显示系统是基于AT89S51单片机的控制,采用这种方法设计的LED点阵显示系统成本低、易于实现。
【关键词】AT89S51单片机;LED点阵汉字;
【论文类型】应用型
Title: LED Dot billboards System design
Major: Electronic and Information Engineering
Name: LiYa Signature:
Supervisor: Zhang Xiao Li Signature:
ABSTRACT

With the LED technology matures, many fields of automotive, advertising, and daily life can be seen the figure of the LED dot matrix display. At present, high-brightness LEDs can produce red, green and blue light and can form a large monochromethe two-color and color LED display. mon application is the image of text display and weather forecasts. In addition the prevalence of the use of LED display advertising signs. Therefore, the LED has a wide application in various fields.
This article describes a microcontroller-based LED dot matrix billboard system and the
AT89S51 microcontroller is the core of Chinese characters of LED dot matrix display system
The article give a detailed description separately from the hardware design and software. The hardware part is made of the line driver module, the column driver module and LED dot matrix display module and software part simple liquidity of the C programming language.
So can present a different display mode , a variety of dot matrix characters display and different space system is controlled by AT89S51 microcontroller. The LED dot matrix display system using this method designed is low-cost and easy to implement.
【Key words】AT89S51 Single-chip puter(SCM); LED Dot matrix characters
【Type of Thesis】Applied type
目录
1 绪论 1
LED点阵汉字显示系统背景 1
LED点阵汉字显示系统概述 2
2 LED点阵汉字显示系统总体方案设计 3
(方案一) 3
译码器74HC154控制列(方案二) 4
3 系统硬件电路设计 5