The LED display control card is responsible for receiving the picture display information from the computer serial port, putting it into the frame memory, and generating the serial display data and scanning control timing required by the LED display according to the partition drive mode. LED display control system (LED Display Control System), also known as LED display controller, LED display control card.

The LED display mainly displays various words, symbols and graphics. The screen display information is edited by the computer, pre-loaded into the frame memory of the LED electronic display through the RS232/485 serial port, and then displayed and played screen by screen, cyclically. The display mode is rich and colorful, and the display screen works offline. Because of its flexible control, convenient operation and low cost, LED display screens have a wide range of applications in various industries in society. At present, several commonly used control cards are: AT-2 type control card, AT-3 type control card, AT-4 type control card, AT-42 type partition card.

The LED display control system is divided into:

LED display asynchronous control system, also known as LED display offline control system or offline card, is mainly used to display various texts, symbols and graphics or animations. The screen display information is edited by the computer. The frame memory of the LED display screen is pre-installed through the RS232/485 serial port, and then displayed and played screen by screen, cyclically, and the display mode is colorful and varied. Its main features are: simple operation, low price, and wide range of use. The simple asynchronous control system of the LED display can only display digital clocks, text, and special characters. The asynchronous control system of the graphic and text of the LED electronic display has the functions of a simple control system. In addition, the biggest feature is the ability to control the display screen content in different areas, support analog clock,

display, countdown, picture, table and animation display, and have functions such as timer switch machine, temperature control, humidity control, etc.;

LED display synchronization control system, LED display synchronization control system, mainly used for real-time display of video, graphics, notifications, etc., mainly used for indoor or outdoor full-color large-screen LED display, LED display synchronization control system controls the LED display The working mode of the screen is basically the same as that of a computer monitor. It maps the image on the computer monitor in real time with an update rate of at least 60 frames per second. It usually has the ability to display multi-gray colors, which can achieve the effect of multimedia advertising. . Its main features are: real-time, rich expressiveness, complicated operation, and high price. A set of LED display synchronization control system is generally composed of sending card, receiving card, and DVI graphics card.