How to distinguish LED display control card from LED display control system

The LED display control card is responsible for receiving the image display information from the serial port of the computer, putting it into the frame memory, and generating the serial display data and scanning control sequence required by the LED display according to the partition driving mode. LED display control system

The LED display control card is responsible for receiving the image display information from the serial port of the computer, putting it into the frame memory, and generating the serial display data and scanning control sequence required by the LED display according to the partition driving mode. LED display control system is also called LED display controller and LED display control card.
LED display screen mainly displays various words, symbols and graphics. The display information is edited by the computer and put into the frame memory of LED electronic display screen through RS232 / 485 serial port in advance. Then, it is displayed and played screen by screen in a cycle. The display mode is rich and colorful, and the display screen works offline. LED display screen is widely used in various industries because of its flexible control, convenient operation and low cost. At present, several commonly used control cards are: AT-2 control card, AT-3 control card, AT-4 control card, at-42 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 all kinds of text, symbols and graphics or animation. The screen display information is edited by computer, pre placed into the frame memory of LED display through RS232 / 485 serial port, and then displayed and played screen by screen. The display mode is rich and colorful, There are many changes. Its main features are: simple operation, low price, wide range of use, LED display screen simple asynchronous control system can only display digital clock, text, special characters, LED electronic display screen graphic asynchronous control system in addition to the function of simple control system, the biggest feature is that it can control the display screen content in different regions, support analog clock display, countdown Pictures, tables and animation display, with timing switch, temperature control, humidity control and other functions;
LED display screen synchronous control system, LED display screen synchronous control system, mainly used for real-time display of video, graphics, notices, etc., mainly used for indoor or outdoor full-color LED large screen display, LED display screen synchronous control system controls the working mode of LED display screen is basically equivalent to the computer monitor, It can map the image on the computer monitor in real time with the update rate of at least 60 frames per second. It usually has the ability of multi gray color display, and can achieve the effect of multimedia advertising. Its main characteristics are: real-time, rich expression, more complex operation, high price. A set of LED display synchronization control system is generally composed of sending card, receiving card and DVI card.