LED点阵书写显示屏的设计

本系统采用单片机AT89S52作为控制核心,设计并制作一个基于16×32点阵LED模块显示屏。该点阵可以实现扫描微亮和显示点亮两种工作模式,能够通过自制光笔检测在点阵处于扫描微亮状态时获取其行列坐标信息,并能通过数码管显示出来,同时能依据功能要求控制检测点处LED的亮灭,在屏幕上实现"点亮、划亮、反显、整屏擦除"等书写显示功能,通过按键可以实现不同功能之间的切换。

Design of LED Dot Matrix Writing Screen

With monolithic processor AT89S52 as the control core,the article designs and produces a LED module screen based on 16×32 dot matrix.The dot matrix can realize two working modes of scanning dim light and display point light,and obtain the row coordinate information when the self-made light pen detection is in the status of scan dim light,which is displayed through digital tube.Meanwhile,when the LED at the control detection point is off according to functional requirements,users can realize display functions such as "spot light,striking light,reverse banding,and whole screen erasing",and also the switch among different functions through keys.