本作品设计并制作了一个基于32×32点阵LED模块的书写显示屏。该作品以STC89C58RD+单片机为主要控制器件，在控制器的管理下，LED点阵模块显示屏工作在人眼不易觉察的扫描微亮和人眼可见的显示点亮模式下。由光敏二极管制成的光笔读取LED点阵信号和键切换功能，当光笔触及LED点阵模块表面时，先由光笔检测触及位置处LED点的扫描微亮以获取其行列坐标，再依据功能需求决定该坐标处的LED是否点亮至人眼可见的显示状态，从而在屏上实现“点亮、划亮、反显、整屏擦除、笔画擦除、连写多字、对象拖移”等书写显示功能。光笔的反应速度可达50KHz，LED点阵每次全盘查寻的时间最长为20ms，待机电流最大3mA，全部达到设计要求，具有控制精度较高、电路结构简单、造价便宜、操作方便等优点。-The design and production of a 32 × 32 dot matrix LED based on the writing of the display module. The works are STC89C58RD+ MCU as the main control device, under the management of the controller, LED dot matrix display modules work in the human eye imperceptible micro-light and scanning the display of visible light mode. Made by the photosensitive diode LED light pen read dot matrix signals and key switching, when the light brush the surface of LED dot matrix module, firstly, light pen scanning micro ranks to obtain their coordinates, and then base on the functions to decide whether the coordinates of the LED light show visible status through people’s eye, which realize the functions of screen, "light, zoned light, anti-significant, the entire screen erase, erase strokes and writing for multiple characters, objects, drag" and other written display. Light pen response speed of up to 50KHz, LED dot matrix for each overall search time up to 20ms, the maximum standby current is 3mA, all me