导　　师： 林耀荣;罗佩怡

学科专业： 0810

授予学位： 硕士

作　　者： ;

机构地区： 华南理工大学

摘　　要： 随着社会经济的发展，LED显示屏已成为社会生产、生活各领域中公共场合信息发布的重要媒介之一。 随着无线通信技术的发展，在现代信息生活中，人们的工作、生活对信息化的要求提升到信息化与网络化、无线化统一的高度。 传统的LED屏内容更新方式是以有线通信技术为基础的，通常采用“上位机-下位机”的通信模式。计算机（上位机）通过串口线与LED显示屏的控制卡相连，以实现对LED显示内容的更新。这种更新方式需要为每个LED显示屏配套上位机。当需要更新的LED屏幕数目很多，更新的内容相同时，这种做法将浪费大量的人力、物力和财力，已经不能满足技术上和经济上的要求，也制约了LED屏幕的大范围应用。为此，采用远程控制的LED内容更新方式将提供给我们一种更为便利的LED控管方式。远程控制的实现有多种方式，不同方式都有一定的适用性。 高速的数据传输速率、与IP网无缝连接和永远在线特点，配合按流量收费的资费方式，使GPRS终端的应用越来越广泛。本设计利用GPRS作为无线通信的空中接口来实现LED屏显示系统的无线数据传输。GPRS终端作为客户端通过Internet与上位机以TCP//IP协议进行LED屏显示信息的无线通信。 本设计的LED显示屏控制器主要由GPRS模块、主控电路模块和LED显示屏三部分组成。文中首先分析了LED屏的传统控制方式的局限性，以及介绍了GPRS的概况与技术特点。然后介绍了系统总体方案与体系结构的设计，论述了LED屏控制器的硬件组成和软件设计的工作流程。经测试证明，本设计可以实现LED屏控制器通过GPRS模块与上位机进行TCP//IP通信，完成显示信息的接收与处理，并驱动LED屏按要求显示。 这种设计可以拓宽LED显示屏的应用领域，具有一定的应用价值。 With the development of society and economy, LED display has become one of theimportant information medium in the realm of production and life. With the development of wireless communication technology, in the modern informationlife, people want to improve the requirements of information technology to networking andwireless. Traditional information-updating was based on wire communication. It contained theupper position machine and the lower position machine. With computer /(upper-machine/)series port and LED display control hardware, it can realize information-updating. But whenhundreds or more LED screens will be updated same information, every LED display withone upper-machine was expensive and wasted. For this reason, research oninformation-updating system of LED display base on wireless long distance control is veryuseful and necessary now. GPRS/(General Packet Radio Service/) is a packet oriented mobile data service on the2Gand3G cellular communication system's global system for mobile communications /(GSM/).GPRS terminals are more widely, because of the high-speed data transfer rate, the seamlessconnectivity with IP network, the charges by traffic, and always-on. The design uses GPRS aswireless communication interface for wireless data transmission of LED display system.GPRS terminal uses TCP//IP protocol to carry out the wireless communication of LED displaythrough Internet. The LED display controller is composed of microcontroller, GPRS module, and LEDdisplay. The paper analyses the limitations of traditional control methods, and introduceGPRS overview and technical characteristics. Then the paper introduces overall design andarchitecture of the system, and discusses the hardware and software design of LED displaycontroller. The experiment shows that LED display controller could communicate with thehost computer /(upper machine/) by GPRS module. The LED display controller receives andprocesses the information, then drives the LED display by required. This design can broaden the applic

关 键 词： 显示屏 远程控制

领　　域： [电子电信]