目前市场上常用的脱机LED显示屏控制方式主要为有线通信。随着移动通信技术的快速发展, 4G开始进入普及阶段。与传统有线通信方式相比, 4G技术不受地点的限制, 在工程成本、环境适应性、网络扩展性及设备维护等方面有明显优势。为了解决工程上有线LED显示屏受地理位置、通信距离、安装方式限制无法安装的问题, 本文设计实现了基于4G-LTE的脱机LED控制系统。系统以i.MX6Q微控制器为核心, 4G全网通模块为无线通信基础, FPGA芯片为LED显示屏扫描控制单元, 实现了ARM+FPGA+4G的全新脱机控制系统架构, 并设计了基于TCP/IP网络通信协议的上位机软件。该脱机控制系统通过4G网络可以实现高质量图像、视频的无线传输, 满足256级灰度全彩色LED脱机屏图文、视频的显示要求。经过测试, 系统能够稳定高效运行, 具有较强的实用性和较高的传输速率。

On the market, the off-line LED display currently used to control the display content mainly by wired. With the rapid development of mobile communication technology, 4G is beginning to enter the popular stage. Compared with the traditional wired communication mode, 4G technology isn’t bound by the place and has obvious advantages in engineering cost, environment adaptability, network expansion, equipment maintenance and so on. In order to solve the problem that wired LED display is not installed because of the geographical location, communication distance and the installation mode, off-line LED control system based on 4G-LTE is designed. The system is designed with the core of i.MX6Q micro controller, wireless communication module of 4G-LTE, and scanning control module of FPGA chip, and achieves a new off-line control system structure that based on ARM+FPGA+4G, and matches PC software based on TCP/IP network communication protocol. The off-line control system can achieve wireless transmission of high-quality images and video, and support 256 full-color LED gray-scale display screens of graphics through the 4G network. After testing, the system can run stably and effectively, and have higher practicability and transmission.