Introduction to the LED display control system

Nowadays, the application of LED display screens is more and more extensive, from outdoor to indoor, large screen to small pitch, all of them appear. However, do we know what the display screen we see depends on? Controlled? In fact, the picture we appear in the LED display is controlled by the system controlled by the LED display. Therefore, next, let's take a look at the members of the LED display control system.

1. Synchronous control:

The so-called synchronization system refers to the LED display control system that displays the content on the display and the computer display in synchronization. Mainly used for indoor or outdoor full-color large-screen display for real-time display of video, graphics, notifications, etc.

Synchronous control system of LED display screen, the working method of controlling the LED display screen is basically equivalent to that of a computer monitor. It maps the image on the computer monitor in real time at a refresh rate of at least 60 frames per second, usually with multiple grayscale colors The display ability can achieve the effect of multimedia advertising. Its main features are: real-time, rich expressiveness, relatively complicated operation and high price. A set of LED display synchronization control system is generally composed of sending card, receiving card, and DVI graphics card.

Generally used for full-color LED display, also suitable for single and double color, because the single-color area is small, so the use of asynchronous is more, the most commonly used synchronous system is: sporadic rain; the rest are Depoda, Zhongqing , Nova, Mengli. These are the most commonly used in China

2. Asynchronous control system:

The asynchronous system means that the edited display data of the computer is stored in the display screen control system in advance, and the normal display of the LED display screen will not be affected after the computer is shut down. Such a control system is an asynchronous control system.

Mainly used to display all kinds of text, symbols and graphics or animation. The display information on the screen is edited by the computer, and it is pre-placed in the frame memory of the LED display via the RS232 / 485 serial port, and then displayed and played screen by screen. Its main features are: simple operation, low price, and wide range of use. The simple asynchronous control system of LED display can only display digital clock, text and special characters. In addition to the functions of a simple control system, the LED display graphic and text asynchronous control system has the biggest feature that it can control the display screen content by regions. Support analog clock display, countdown, pictures, tables and animation display. It has functions such as timer switch, temperature control and humidity control. Generally applicable to monochrome, there are a small number of full-color, generally have Li Yan, finger width, etc.

3. Wireless control:

Wireless LED control is an LED display control card using wireless information transmission technology, which mainly uses the GPRS flow network of the mobile phone card to send programs and manage the LED display. The control system is mainly used for taxi LED display, bus LED display, Chinese sports lottery, Fucai door head LED display, weather station LED display and other systems, including GSM control, GPRS control, GPS control!

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