What is asynchronous and synchronous system

LED display asynchronous control system , also known as the LED display line control system or offline card . Mainly used to display a variety of text , symbols and graphics , or animation -based . The screen displays information by computer editing, pre- placement LED display frame memory via RS232/485 serial port , and then by the screen display to play back, with rich and colorful display , diverse . Its main features are: simple operation , low cost , wider use . LED display simple asynchronous control system can only display digital clock , text, special characters .

LED display graphics asynchronous control system in addition to function with a simple control system , the biggest feature is the display content can be divided into regional control . Support analog clock , countdown , pictures, tables and animation . Timer switch, temperature control , humidity control and other functions.

LED display synchronous control system is mainly used to display video in real time , illustrations, notifications, etc. . Mainly used for indoor or outdoor full-color large-screen display . LED display synchronous control system to control the LED display work basically the same as a computer monitor , at least 60 / s update rate , real-time and little bit of the corresponding map image on the computer monitor , usually with multi - gray color display capacity , multimedia advertising effect . Its main features are: real-time , rich and expressive, more complex to operate , the price is high . A synchronized LED display control system in general by sending cards, reception cards, and DVI graphics .