LED点阵书写显示屏的原理与制作.docxVIP

LED点阵书写显示屏的原理与制作摘要单片机AT89C51为核心，采用74HC138作为译码驱动器,可以控制LED点阵屏的输出字符模式状态,通过光敏三极管制作的光笔作为接收器,通过三极管放大,再经过反向电阻,输入单片机,实现灯从微亮到人眼可看见的点亮、“划亮”、“整屏擦除”“连写多字”’笔画擦除“等功能。以它为控制系统进行了LED点阵显示屏的显示过程。设计并制作了一个基于32×32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，在扫描过程中通过自制光笔检测，获取行列坐标信息，实现“点亮、划亮、整屏擦除、笔画擦除、连写多字等书写显示功能，并且通过按键可以实现不同功能之间的切换。通过单片机的控制实现各种显示功能，该芯片控制一个行驱动器APM4953和两个列驱动器74HC595来驱动显示屏显示。该电子显示屏可以显示各种文字，全屏能显示多个汉字。信息处理技术于一体的显示系统，是目前国际上极为先进的显示媒体。经实践证明，该系统显示误差小，性能稳定，结构合理，扩展能力强。关键词：单片机LED点阵显示光笔·Dot matrix LED writing display screen AbstractAT89C51 single chip computer as the core, Using 74HC138 as a decoding driver, The state of the output character mode can control LED dot matrix screen, The light pen making as a receiver of photosensitive resistance, Through the transistor amplification, and then after the reverse resistance, Input scm, The realization of lamp can be seen from the micro light to the human eye, strike a light,Full screen erase write many words and other functions. Control system for it for the dynamic design and development of LED dot matrix display process.The design and implementation of a LED based on the 32 * 32 dot matrix display module. The lattice can realize scanning micro bright light and display two kinds of work mode, In the process of scanning through the self-made light pen detection, The ranks of coordinate information acquisition, The realization of light, lit, the entire screen erase, Solid multi word such writing display function, And through the key can switch between different functional. Through the MCU control to achieve a variety of display function, The chip controls good driver APM4953 and two row driver 74HC595 to drive the display screen to display. The electronic screen can display various kinds of text, Full screen can display a plurality of Chinese characters. System information display processing technology in one, Is currently on the extremely advanced display media. Proved by practice, this system shows a small error, Stable performance, reasonable struc