A, LED dot matrix display screen: is composed of multiple LED light-emitting diode packaging together, is a kind of new display device. To illustrate the principle of LED dot matrix display, with the single chip processor as the core, designed and produced a display system contains two parts of hardware and software. This circuit can be realized through key control any number of characters of shutter, a variety of display forms up and left, can be widely used in airports, shopping malls, hospitals, public places such as text advertising, information release, etc. And has small, hard circuit structure is simple and easy to implement, etc.
Second, the system hardware circuit is introduced: the display screen of the controller hardware circuit part mainly consists of three parts: serial communication interface, external storage