LED点阵书写显示屏设计

The Design of Dot-Matrix LED Writing Display Screen

本文介绍了基于32×32点阵LED书写显示屏的设计方法,给出其硬件电路原理图和软件流程图。设计以单片机AT89C52为控制芯片,使点阵显示屏工作在人眼不易觉察的微亮扫描模式和人眼可见的点亮显示模式下,通过光笔对接触点的行列坐标检测,可在显示屏上相应位置实现"点亮"、"划亮"、"反显"和"整屏擦除"等功能。系统采用双机通信的方式,具有显示清晰、响应速度快、可靠性高等特点。

This thesis introduces the design of 32×32 dot-matrix LED writing display screen,and it also presents the principles of hardware circuit and software flow chart.By using AT89C52 as controller chip,the dot-matrix display screen can work under invisible micro-scanning model and visible dots display model.Through the checking of lightpen on contact point＇s coordinate,the display screen can have the functions of LED dots,zoned-light,anti-displaying the data,and entire screen erasure in some place.The system adopts parallel port,which makes the display clear and reliable,and accelerates response speed.