一种大屏LED智能显示屏的设计.pdfVIP

Applied Physics 应用物理, 2014, 4, 53-59 Published Online April 2014 in Hans. /journal/app /10.12677/app.2014.44008 Design of the Large Intelligent LED Display Chenghui Yang1,2 1 College of Electrical Engineering, Northwest University for Nationalities, Lanzhou 2 School of Automation Electrical Engineering, Lanzhou Jiao Tong University, Lanzhou Email: yangchenghui36@163.com th th th Received: Apr. 8 , 2014; revised: Apr. 30 , 2014; accepted: May 7 , 2014 Copyright © 2014 by author and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract LED display is a new kind of information display media, which is a flat-type display screen con- sisting of light-emitting diode dot-matrix modules, or pixel units. In recent years, it has been widely applied in the field of information display due to its high luminous efficiency, long service life, environmental adaptability, high performance-price ratio, flexible configuration and rich col- ors. The design uses AT89C51 microcontroller as the control core, through the hip 74HC154 ex- pansion I/O port and uses ULN2803 to be row, column drivers, to control LED dot matrix display to display different processes of Chinese characters or images under the control of different buttons, realizing the design of large LED display. In this paper, the usage of debugging software Keil C51, the welding and commissioning process of hardware and so on were introduced. The circuit con- figuration of the whole system is simple and highly reliable. Keywords LED Dot-Matrix Screen, AT89C51, Eight Arrays Darlington ULN2803, 74HC154 Decoder