LED点阵全彩屏的设计【毕业论文】.doc

本 科 毕 业 设 计 LED点阵全彩屏的设计 摘要 在现在日新月异的年代里，街上放眼望去，都是满世界的单色的屏幕。随着现在技术的进步，这些单色的LED屏已经很难满足现在的要求了，用户对现在的LED又提出了不同的要求，有的看重效果，有的看重运行的环境，有的看重显示的效果，显示的方式，有的看重系统的安全性，稳定性，性价比等。 本文采用的是89C51单片机作为核心控制器件来控制整个电路的运行，以电路设计和程序设计为重点，先介绍原理图的制作，使用单片机是为了发挥它实用，高效，稳定，经济的多个优点。通过于各个驱动芯片的连接来完成需要点亮全彩LED的灯管，行驱动芯片使用的是两块74HC138组成的1个4/16译码器，对行进行扫描，列驱动芯片使用的是3块TLC5946芯片，负责对各个彩色管脚的管理，和灰度控制。由单片机进行串行数据传输，和两块驱动芯片通信，达到预期的要求。由单片机和上位机PC进行通信。 然后对程序进行设计，由各种中断来控制这种的LED点亮时间，扫描时间，等各种需求。然后对列驱动进行操作，那些静止，移动，闪烁等功能全由主程序完成。行驱动来扫描达到持续点亮的要求，一般需要每秒60次的扫描，这样肉眼就无法看出闪烁的画面了。达到情况。 关键词：全彩LED；89C51；tlc5946 Abstract In the present era of ever-changing, and the streets are all kinds of debauchery, looking ahead, are all over the world the color of the screen. With current technology, the color of the LED screen has been difficult to meet the current requirements of the users of the current LED and put forward different demands, some value the effect of the environment to run some value, some value display results, show the way, some value the system’s security, stability, cost and so on. In this paper, the 89C51 microcontroller as the core control device to control the operation of the entire circuit to circuit design and programming focus, first introduced the production of schematic, the use of SCM is to play it practical, efficient, stable and economical advantages over .Through the connection to each driver chip to complete the required full-color LED lamp lights up, the line driver chip using two 74HC138 composed of a 4 / 16 decoder, scanning the rows, columns, using a driver chip 3 TLC5946 chip, is responsible for the management of each color pins, and the gray scale control. Serial data transmission by the microcontroller, and two drive-chip communication to achieve the desired requirements. PC by the microcontroller and the host computer to communicate. And then design the program, interrupted by a variety of LED lights to control this time, scan time, and other needs. And then operate on the column driver, who still, mo