What is the difference between the LED display synchronous control system and the asynchronous control system
Time:2018-10-13
Views:2137
LED display control system is the core component of LED display, which is mainly responsible for receiving the picture and video information from the computer‘s serial port or DVI interface, and placing the frame memory to display the content.It is mainly divided into synchronous system and asynchronous system. Let‘s make a comparative analysis of these two control systems.
I. LED display synchronous control system: mainly used for real-time display of video, picture and text, notice and other information.Mainly used for indoor or outdoor full-color LED display.LED display synchronous control system controls the working mode of the display screen, which is basically the same as the monitor of the computer. It maps the image on the computer monitor in real time with at least 60 frames/second update rate points. It usually has the ability of multi-grayscale color display, which can achieve the multimedia advertising effect.
Its features are: real-time, expressive power, complex operation, high price, and the content on the computer monitor is completely synchronous display. Therefore, if the computer is turned off, the LED screen will not show, so the playing time will be limited.This system is mainly used in places with high requirements on real-time performance.
LED display asynchronous control system: also known as LED display off-line control system or off-line card.Mainly used to display a variety of text, symbols and graphics or animation.The picture display information is edited by the computer, and the frame memory of LED display is pre-placed through the serial port of rs232/485. Then, it is displayed and played on screen by screen.
Its characteristics are: simple operation, low price, wide range of use.The biggest feature is that the display screen content can be controlled by regions, and the content is not synchronized with the computer monitor.After editing on the computer, it will be sent to the control card, and then the control card will be displayed.So, even if the computer is turned off, the LED display can still be displayed, but the broadcast information will be limited, because the control card storage capacity has a certain range.It is applicable to places where the requirement for real-time is not high.
This is the difference between LED display synchronous control system and asynchronous control system. Customers can choose one of them according to their actual situation.
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