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LED Display Control System Related Principles
- Nov 23, 2017 -

What is the principle of the so-called control system in the LED display industry? The control system of the LED display system mainly consists of two types: synchronous system and asynchronous system. Synchronous system: that is, the LED display and the contents of the computer display are completely synchronous display. What are the characteristics of synchronous control systems? Synchronous control system is mainly used for real-time display of video, graphics, notifications and so on. It is mainly used in indoor or outdoor full-color large screen display. Monitor LED display synchronization control system to control the screen mode is almost equivalent to the computer, it takes at least 60 frames per second update rate corresponding to the real-time image mapping on the computer monitor, usually with multiple grey color display ability, can achieve the aim of multimedia advertisement.


Its characteristics are: real-time, expressive power, operation is more complex, and the content of the computer monitor is completely synchronous display, so, if the computer is closed, then the LED display will not show, so the playing time will be limited. This system is mainly used in places where the real-time requirements are relatively high. What is an asynchronous control system? Asynchronous system: that is, the LED display is not synchronized with the content on the computer monitor. First, edit it on the computer, then send it to the control card, then the control card is displayed again.  What are the characteristics of asynchronous control systems? Asynchronous control system is also called LED display offline control system or offline card. Mainly used to display a variety of text, symbols and graphics or animation based. The screen display information is edited by the computer, and the frame memory of the LED screen is pre placed by the RS232/485 serial port. Then the screen is displayed by screen, and the cycle is repeated. The display mode is colorful and varied, and the LED lamp pole screen is displayed.


Its characteristics are: simple operation, wide range of use.  The most important feature is that the content of the screen can be displayed in the region control, which is not synchronized with the content on the computer monitor. First, edit it on the computer, then send it to the control card, then the control card is displayed again. So even if the computer is closed, the LED display can also be displayed, but the amount of play information will be limited, because the control card has a certain range of reserves. It is suitable for places where the real time requirement is not high.


What are the advantages and disadvantages of these two control methods? The advantages of synchronous control: with the computer system, superior performance, suitable for fixed position, high display requirements of the place. Many years of development, mature system, perfect function, support video live, and so on. With large load range, good display effect, suitable for traditional large screen project. The disadvantages of synchronous control: rely on computer system, play site limited function, homogenization serious, market competition is fierce, the traditional project market tends to be saturated, growth is weak. The advantages of asynchronous control: embedded chip performance improved rapidly, asynchronous system growth accelerated. Set the program acceptance, storage, compilation and other functions in one, more flexible applications, functional diversity, buy more, contribute to differentiated marketing. Asynchronous control shortcomings: customer perceptions of asynchronous system needs to be improved with a limited range of load show effect is worse than that of synchronous system, but the two LED display price is not the same.


Synchronous control system: the LED screen is installed using the synchronous control system, synchronous control system is chosen because the LED screen is mainly used for meeting activities related to display, on the screen performance of rich and real-time have higher requirements, so the LED screen control system with step loading is the most appropriate choice. Asynchronous control system: the LED display screen is installed using the asynchronous control system, chose the asynchronous control system because the main purpose for this screen is advertising, it is because of this system can realize the timely transmission through the cloud server, sub regional delivery of advertising, news spots, missions fixed-point operation, save a lot of manpower and other issues, so that the LED display is suitable for asynchronous control system.