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

The Led Display control card is responsible for receiving the screen display information from the computer serial port, placing it into the frame memory, and generating the serial display data and scan control timing required for the Led Display Screen according to the partition driving method. LED display control system, also known as LED display controller, LED display control card.
The LED display is mainly for displaying various characters, symbols and graphics. The screen display information is edited by the computer, and is pre-positioned into the frame memory of the LED display through the RS232/485 serial port, and then displayed on a screen-by-screen basis. The display mode is colorful and the display works offline. LED display has wide application in various industries because of its flexible control, convenient operation and low cost. At present, several commonly used control cards are: HD-M type control card, HT-3BU type control card, HT-CA type control card.

LED display control system is divided into synchronous and asynchronous:
LED display synchronization control system, mainly used for real-time display of video, graphics, notifications, etc., mainly used for indoor or outdoor full-color LED large-screen display, LED display synchronization control system to control the operation of LED display is basically equivalent to The monitor of the computer, which maps the image on the computer monitor in real time with a update rate of at least 60 frames/second, and usually has multi-gradation color display capability, which can achieve the multimedia advertisement effect. Its main features are: real-time, rich expression, complicated operation and high price. A set of LED display synchronization control system generally consists of a sending card, a receiving card, and a DVI graphics card.
LED display asynchronous control system, LED display asynchronous control system, also known as LED display offline control system or offline card, mainly used to display various texts, symbols and graphics or animation, the screen display information is edited by computer. The frame memory of the LED display screen is pre-positioned through the RS232/485 serial port, and then the display is played on a screen-by-screen basis, and the display mode is colorful and varied. Its main features are: simple operation, low price, wide range of use, LED display simple asynchronous control system can only display digital clock, text, special characters, LED display 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 by region, support analog clock display, countdown, picture, table and animation display, with time switch, temperature control, humidity control and other functions.

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