Answer: LED display screen offline control system or offline card.
Answer analysis: LED display screen asynchronous control system is also called LED display screen offline control system or offline card.
This system is mainly used to display various texts, symbols, graphics or animations. Its characteristics include simple operation, low price, wide range of use, and the ability to control the display content of the display screen in different regions. In the asynchronous control system, the screen display information is edited by the computer and pre-placed into the frame memory of the LED display screen through a specific interface (such as RS232/485 serial port), and then displayed and played screen by screen, cyclically, with rich and varied display methods.
The LED display screen asynchronous control system is one of the core components of the LED graphic display screen. It is responsible for receiving the screen display information from the computer and generating the serial display data and scanning control timing required by the LED display screen in a partitioned driving manner. This system enables the LED display screen to display the preset content normally without computer control, thereby improving the flexibility and practicality of the display screen.
In summary, the LED display screen asynchronous control system plays an important role in the display and control of the LED display screen, and is one of the important means to achieve diversified and efficient display of the LED display screen.