What is the difference between synchronous and asynchronous full-color LED display control cards? 

There are two types of led display control cards in the market to drive full color led screens: synchronous and asynchronous control cards.

Synchronous full-color LED display control card. 

It is mainly used for the real-time display of videos, graphics, and notifications,  it can be used in indoor or outdoor full-color large-screen. The synchronization control system controls show the screen working basically the same as a computer monitor. It maps the image on the computer monitor in real-time with an update rate of at least 60 frames per second. It usually has the ability to display multi-gray colors. It can achieve the effect of multimedia advertising.

Asynchronous full-color LED display control card. 

It is also called display offline control system or offline card. Mainly used to display various text, symbols, and graphics or animation. The information of the screen is edited by the computer, pre-installed into the frame memory of the display screen via the RS232/485 serial port, and then displayed and played screen by screen, cyclically, the display mode is colorful and varied. The screen simple asynchronous control system can only display digital clocks, text, and special characters. In addition to the functions of a simple control system, the display graphic asynchronous control system has the biggest feature that it can control the display content in different areas. Support analog clock display, countdown, picture, table and animation display. It has the functions of timing switch, temperature control, humidity control, etc. But this kind of display has a drawback, that is, if the computer is turned off, the LED display will not display any content, so the playing time will be limited. Of course, if the computer works 24 hours a day, then the screen will work 24 hours a day without any problems.

Features of the LED display control card:

The main features of the display synchronization control card are real-time, rich expressiveness, complicated operation and high price.

The main characteristics of the asynchronous control card for the display screen are simple operation, low price and wide range of use.

The composition of the synchronization control card. 

The sending card is to display the content to be displayed on the VGA monitor according to the specific format and certain broadcast order required by the LED display; on the other hand, the picture displayed on the VGA monitor is sent to the control board through the capture card. It is an interface card between the display card and the LED screen. The receiving card receives the video signal (control signal and data signal) transmitted by the sending card, separates the data in the video signal through bit planes, stores it in an external buffer, and then read it out and transmits it to the display drive screen.

It is characterized by simple operation and wide range of use. It can control the display content in different areas. Even if the computer is turned off, the LED display can still display the content normally, but there will be certain restrictions on the amount of playback information, so it is not suitable for applications with high real-time requirements.

The composition of the asynchronous control card. 

It is to store the edited display data of the computer in the display control system in advance, and the normal display of the led screen will not be affected after the computer is turned off. Simply put, it is to use a control card, computer editing content, or U disk to put the content in the control card, and then there is only one control card to control the screen without computer control.

Which LED screens are suitable for synchronous and asynchronous control systems?

The answer is: 

synchronous control system with the computer system has better performance and is suitable for applications with high requirements for fixed installation and display effect. It supports live video and real-time synchronized network video, etc., with a large load range, suitable for large and medium-sized LED displays. The asynchronous control system integrates multiple functions such as program reception, storage, and compilation, making the application more flexible. However, the load range is small and the storage space is limited, and it is generally suitable for scenarios that do not require long-term replacement of playback content. such as the fields of stage rental, concerts, live broadcasts, evening parties, schools, stations, shopping malls, banks and hospitals, and places with rich and real-time performance on the screen. 

The asynchronous control system is suitable for application places such as regional advertising, fixed-point publishing tasks, traffic guidance screens, LED advertising machines and LED light pole screens.

What screens in Premteco are mainly operated with the synchronous control system and asynchronous control system respectively?

With synchronous control system mainly run the mobile led screens. Our M2 series led displays are usually used as warnings for schools, passersby or road closure or detour notification... These sites often need to convey specified information to the target audience. Therefore, users often input the setting contents with phone or computer remotely instead run the led screen on site.

Except for mobile led screens, our advertising led players can also be controlled with synchronous control system. Our advertising led screens are commonly used as advertising display in shopping plaza, stores, street and street lamp pole. People use them to advertise their commercial goods to seize market shares.

With asynchronous control system mainly operate the outdoor and indoor rental led video wall. Our outdoor and indoor led screens are often used in stage events where live shows on the stage should be conveyed to the audience fresh. Thus, People often use computers to run the rental led screens for a more interactive effect with the audience.

Another LED screen in Premteco is the outdoor advertising led display. Our OA series is a perfect design for outdoor advertising. It is always used in the central park with single-pole or double-pole installation. Users use this advertising screen to convey new feeds of their goods via phone anytime anywhere.

Project cases with synchronous led control system and asynchronous led control system?

In 2013, one of our customers sent Premteco inquiries about mobile led screen, after detailed discussion, we recommend him our P6 outdoor M2 series led screen. In fact, our M2 series truck led screen has a comfortable control room with air conditioner and big size space inside, the technicians will feel much more comfortable when they operate the screen.

Recently, we have just exported 12 square meters led screen to Germany. They are rental led display used in stage events. In view of the customers' requirement, we design 58mm thin cabinet with control box isolated in the back of the cabinet framework. It is light-weight and neat. Most importantly, it can be operated with App to broadcast live!