标题:
一种大屏LED智能显示屏的设计Design of the Large Intelligent LED Display
作者:
杨成慧
关键字:
LED点阵屏, AT89C51, 八阵列达林顿ULN2803, 74HC154译码器LED Dot-Matrix Screen, AT89C51, Eight Arrays Darlington ULN2803, 74HC154 Decoder
期刊名称:
《Applied Physics》, Vol.4 No.4, 2014-05-23
摘要:
LED显示屏是一种新型的信息显示媒体，它是利用发光二极管点阵模块或像素单元组成的平面式显示屏幕，以发光效率高、使用寿命长、环境适应能力强、性价比高、组态灵活、色彩丰富等特点，在短短的十来年中，迅速成长为平板显示的主流产品，在信息显示领域得到了广泛的应用。本设计用AT89C51单片机做控制核心，外围扩展芯片74HC154扩展I/O口并利用ULN2803为行、列驱动，控制LED点阵屏在不同的按键控制下显示不同的汉字或图像的过程，实现了大屏LED显示屏设计。介绍了程序调试软件Keil C51的用法等，及硬件的焊接、调试过程。整个系统的电路结构简单，可靠性高。
LED display is a new kind of information display media, which is a flat-type display screen consisting 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 colors. The design uses AT89C51 microcontroller as the control core, through the hip 74HC154 expansion 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 configuration of the whole system is simple and highly reliable.