LED dot matrix electronic display screen is a large display screen system integrating microelectronics technology, computer technology and information processing technology. It has become an ideal choice for many display media and outdoor operation displays due to its bright colors, wide dynamic range, high brightness, long life, stable and reliable operation, etc. It can also be widely used in many industries such as military, stations, hotels, sports, news, finance, securities, advertising and transportation. At present, most LED dot matrix display systems come with fonts. The realization of its display and dynamic effects (mainly the scrolling of display content) mainly relies on hardware scanning drive. Although this method is relatively convenient, the display can only be carried out according to the pre-designed. In fact, some special requirements for dynamic display are often encountered, such as the up and down movement of the indicator arrow during elevator operation, the bar display of the amplitude of some intelligent instruments, and the display of the manufacturer\'s trademark in advertisements. At this time, it is difficult for general display systems to meet the requirements. In addition, due to the limitations of the memory itself, its special characters or patterns are often difficult to display, and the display content cannot be changed at will. This paper proposes a communication method for LED display system controlled by PC and single-chip microcomputer. This method can control the display content (including Chinese characters and special icons) in real time, thus realizing various dynamic display effects such as flashing, scrolling, typing, etc. This method can also adjust the speed of dynamic display, and users can also preview the display effect on the PC, and the display content can also be modified in real time. In addition, the display system can also be remotely controlled through the standard RS232/485 conversion module.
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