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[Engineering knowledge] How can the LED screen update the content in real time?

Published:2020-01-11 14:19:29

According to the control system, the LED screen can be divided into: off-type LED display, online LED display, wireless LED display. Each type of LED display control system content update method is different, the following is a detailed introduction of the three LED screen control systems.

Off-screen LED display
The off-type control system is also commonly called asynchronous control system. The off-type LED display mainly refers to the real-time control of the LED screen without relying on the control computer when running. The off-type LED display is mainly used in small single and double color LED displays, with text information as the main display content form.

The update of the offline LED display is mainly edited by the control computer and then sent to the control card of the display through the control software. After sending, you can disconnect from the computer without affecting the normal operation of the display.

Online LED display
On-line control system is also called synchronous control system, which is the main control system of current full color LED display.

The on-line control system displays the content of the specified display area on the control computer through point-to-point mapping. The content is updated in real time according to the display content on the control computer. If you want to change the program, you can control the computer by operating its control software.

Wireless LED display
The wireless LED display screen controls the content of the LED screen wirelessly. Mostly used in places where wiring is not convenient and the display screen is far from the control center. Such as taxi LED screens, street-side LED screens, community LED screens released by centralized control, etc.
The wireless LED screen can be divided into WLAN, GPRS / GSM and other modes according to the communication method. The content update of wireless LED screens is managed centrally through its control center. Utilizing the wireless method has the characteristics of being convenient and not restricted by the location, but the use of GPRS / GSM requires additional communication costs. Especially for larger content such as videos, if the update is frequent, the cost is still relatively high.
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