基于单片机的点阵汉字显示屏设计与开发 - LED点阵显示技术研究及实现

D LED dot matrix display is a emerging display device, which is composed of multiple independent LED light-emitting diodes. LED dot matrix display can display numbers or symbols, usually used to display time, speed, system status, etc. This design is a design of 4 16x16 dot matrix LED electronic display screens. The whole machine is based on the 40-pin MCU 80C51 produced by the American company ATMEL as the core, introducing the dynamic design and development process of the LED dot matrix electronic display screen controlled by it. Through this chip, a row driver 74LS138 and eight column drivers 4049 are used to drive the display screen. The electronic display screen can display 4 Chinese characters, using 16 8x8 dot matrix LED display modules to form 4 16x16 dot matrix display modes. The display adopts dynamic display, so that the text can be displayed in a static manner. The article details the hardware design ideas of LED dot matrix display, the functions and principles of various parts of the hardware circuit, the corresponding software program design, and usage instructions, etc. Keywords: 80C51 MCU; LED; dot matrix display; dynamic display.