At present, the competition for LED displays is becoming more and more intense. Correspondingly, the competition for the core component of the display, the control system, is becoming more and more intense.
The initial control of the full-color LED display is synchronous control: computer + send card + receive card. This kind of control mode can make the display screen get high-quality picture output, and the real-time replacement of the playing content, and get a wide application in the LED display.
After the application of the display screen is more and more extensive, the customer's control method for the full color display screen is more and more demanding. For example, outdoor remote display screens, computers are not easy to monitor, and the venue is not suitable for computers. As a result, the asynchronous control system came into being. The control mode of the asynchronous control system: control card + wireless module / U disk / wifi. This type of control can be used for remote management without the need to configure a computer in a full color display. First, the cost of the computer is eliminated; second, no personnel are required to be on duty; third, not limited by geographical distance.
In the early stage of the asynchronous control system, the asynchronous display system has the disadvantages of the relative synchronization system: the load-bearing area is not large, and only a small screen can be adopted; the refresh rate and the gray scale are low. This makes asynchronous control cards largely inaccessible. Therefore, there is such a scheme instead of implementing the asynchronous requirement: an industrial computer is installed on each display screen, and the "synchronous transmission card + receiving card" is used to remotely control the PC, then: the control mode of the PC to the PC, Solved the shortage of personnel to the site management. However, there is another problem. One cost is more than the cost of a real asynchronous system. Second, the computer is prone to crash, and this requires management personnel to go to the site for maintenance.
With the promotion of outdoor advertising screens, car display screens and other applications, users are eager to have a control system that can directly play specified video or tasks, instead of relying on the computer to complete the playback task control system, while achieving high refresh and high Gray scale, large area loading requirements.
The new generation of asynchronous control systems must first meet the requirements of high refresh, high gray scale and large area loading. At the same time, the system needs to have the ability to play - with large storage, directly read the files on the memory (video, pictures, text). Under these conditions, you need to have: 3G wireless transmission management, U disk offline, wifi LAN, wired LAN, wired Internet and other functions. In order to promote the wider application of full color display. For example: highways, remote areas, outdoor advertising, thresholds, stations, bus stops.
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