Answer: A. Sending card, B. Receiving card, C. DVI graphics card.
Answer analysis:
A set of LED display synchronous control system generally consists of the following options:
A. Sending card: The sending card is one of the key components in the synchronous control system. It is responsible for converting data signals such as video, images or text from computers or other signal sources into a format suitable for LED display reception, and sending these data to the receiving card through some communication method (such as Ethernet, optical fiber, etc.).
B. Receiving card: The receiving card is installed on the back of the LED display or connected to the control unit of the display. It is responsible for receiving data signals from the sending card and decoding them into information that can be controlled by the pixels on the display, and finally driving the LED display to display the corresponding image or text.
C. DVI graphics card: In the synchronous control system, although the DVI graphics card is not specially designed for LED display, it is usually part of the signal source. The DVI graphics card outputs high-quality digital video signals through the DVI interface. These signals can be used as the input source of the sending card, and then sent to the receiving card after being processed and converted by the sending card. However, it is worth noting that with the development of technology, there are now many control systems that directly use other types of graphics cards and interfaces such as HDMI and DisplayPort.
D. Display: This option is usually not part of the LED display synchronization control system. Displays are usually used for display output of computers or other devices, rather than directly participating in the control process of LED displays. In the control system of LED displays, the display refers to the LED display itself, not the traditional computer monitor.
Therefore, a set of LED display synchronization control system generally consists of A (sending card), B (receiving card) and C (DVI graphics card, or other types of graphics cards and interfaces). D (display) is not part of this system. So the correct answer is A, B, C.