"单片机 LED 点阵汉字显示屏设计研究"

This graduation thesis focuses on the design of a LED dot matrix display screen based on a single-chip microcontroller. The LED dot matrix display screen is a new type of display device, composed of multiple independent LED light-emitting diodes. It is commonly used to display numbers, symbols, and various information like time, speed, and system status. In this design, four 16x16 dot matrix LED electronic display screens are used, with the American company ATMEL's 40-pin single-chip microcontroller 80C51 as the core. The single-chip microcontroller is used to control a row driver 74LS138 and eight column drivers 4049 to drive the display screen. This electronic display screen can display four Chinese characters, using 16 8x8 dot matrix LED display modules to create four 16x16 dot matrix display modes. The display adopts dynamic display, allowing the characters to be displayed in a static manner. The thesis details the hardware design concepts of the LED dot matrix display, the functions and principles of each part of the hardware circuit, the program design of the corresponding software, and the instructions for use. In conclusion, this LED dot matrix display screen design based on a single-chip microcontroller provides a practical and efficient solution for displaying Chinese characters. The use of dynamic display enhances the visual appeal and usability of the display screen, making it suitable for various applications. This thesis serves as a useful reference for those interested in LED dot matrix display technology and MCU-based design.