This paper has introduced a simple kind of method of implementing multiple LED displaying using two I/O ports of single chip microcomputer AT89S52 and cheap shift registers,as well as the hardware circuit diagram and C51 program.
The displaying interface of 8279 and the characteristics of 8- and 16-segment LED displaying and driving circuit are analyzed in the paper. The displaying and driving method of 8-segment LED mixed with 16-segment LED is presented and an economical and practical displaying circuit is introduced.
The paper introduced development situation of LED video display technology at present and development trend in the country, and present mainly LED video display systemic structure and primary technology principle, such as principle of systemic display, realization of dot-matrix devices circuit, LED display screen display structure, and display feature.
According to the characteristics of the LED module structure, combining the technology of CPLD,the dynamic scanning display of the LED display screen was realized. A kind of large LED-screen display control system was designed.
It is expounded in detail that LED display technique and its application, function, characteristic and etc in information display of scheduled flight in airport, and introduce the information flow in airport It is useful to understand the function of the LED display screen
To solve the problem appeared in LED display screen control system designed by singlechip,this article introduces a large screen LED display control system based on programmable logic device,which replaces the single serial transmit mode with the combination of serial and parallel mode(between) the controller and display screen.
Experiments on distance perception of stereoscopic targets have been conducted with the stereoscopic LED displays using parallax barriers, as well as a stereoscopic LED display using polarizing eyewear.
The small size, only four command switches and the six-digit LED display for parameter presentation make the instrument easy for use in the clinic.
You might note that the LED display does not form every character of the alphabet completely, so you have to do a little creative interpretation.
You will see this as you view the pictures of the LED display as you review these instructions.
A hard event will be evident by a solid pulsing of the converter and a brief flash of digit on the LED display.