Principles of synchronous control and asynchronous control

1.The concepts of synchronous control and asynchronous control:

Synchronous control: Mainly used for full-color LED electronic displays, which require a computer to output data synchronously to work. The synchronous control card maps the image on the computer monitor in real time, has multi-grayscale color display capabilities, and is suitable for indoor or outdoor large screens.

Asynchronous control: Mainly used for simple single and double color LED displays. Just edit the content and import it directly with a USB flash drive to work. The asynchronous control card pre-places the display content into the frame memory of the display screen and displays it screen by screen. It is suitable for displaying text, symbols, graphics or animations. Take you to learn more about LED display synchronous control and asynchronous control.

Principles of synchronous control and asynchronous control:

2.1 Synchronous control principle:

Sending card: Display the content to be displayed on the VGA monitor in the specific format required by the LED display, and send the picture to the control panel through the capture card.

Capture card: It is the interface card between the VGA display card and the LED screen. It transmits the images displayed on the VGA monitor to the control board.

Receiving card: Receives the video signal transmitted from the sending card, separates the data into planes, stores it in different fields, and transmits it to the display driver screen.

2.2 Asynchronous control principle:

Asynchronous control card: Stores the display data edited by the computer in the display control system and does not rely on the computer for work. Content can be imported through U disk and other methods to maintain the normal display of the LED display.

Features of the display control card:

Synchronous control card:

Features: real-time, rich expressiveness, complex operation, and high price. Scope of application: Mainly used for indoor or outdoor full-color large-screen display. Do you understand the difference between indoor and outdoor LED walls?

Asynchronous control card:

Features: Simple operation, low price, wide range of use. Scope of application: Mainly used for simple single and double color LED displays, supporting text, symbols, graphics or animation. LED displays are divided into single-color, dual-color and full-color types.

The composition principle of the display control card:

4.1 Composition of synchronous control card:

Sending card: Real-time mapping of images on the computer monitor and sending the images to the control panel through the capture card. Capture card: The interface card between the VGA display card and the LED screen, which transmits the picture to the control board. Receiving card: Receives the video signal transmitted by the sending card, separates the planes, stores it in different fields, and transmits it to the display driver screen.

4.2 Composition of asynchronous control card:

Asynchronous control card: Store the display data edited by the computer in the display control system, and import the content through U disk and other methods. Free purchase guide for LED display control system. Control card: Controls the work of the display screen, is responsible for the playback of display content, and supports regional control and multiple display methods.

These two control methods are selected according to the application scenarios and requirements of the LED display. Synchronous control is mainly used in situations that require high real-time performance and rich expressiveness, while asynchronous control is more suitable for scenes with simple display requirements and easy operation.

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What is the principle of synchronous and asynchronous control of LED display?