The difference between synchronous system and asynchronous system of LED display

The control system of LED display screen generally has two main types: synchronous system and asynchronous system.

Conference screen-LED synchronous control system

LED display screen synchronous system: As the name implies, the synchronous system is completely synchronized with the content on the computer monitor.

Whatever is displayed on the visible display screen, the LED display screen will display the same content

Of course, it can display all or part of the content of the display screen. The core key is to update and synchronize the content information specified by the computer in real time.

So, if the computer is turned off, the communication between the computer and the display screen is interrupted, and the information is not sent to the display screen, then the LED display screen will not be displayed.

This LED synchronous system is mainly used in places with high real-time requirements.

Strip screen-LED asynchronous control system

LED display asynchronous system:

As the name implies, the asynchronous system means that the information does not need to be updated in real time and does not need to be synchronized with the content on the computer monitor.

The principle of the LED asynchronous system is to first edit the content to be played on the computer

Then send it to the control card of the LED display screen through the transmission medium (network cable, data cable, 3G/4G network, WIFI, USB flash drive, etc.), and then the control card will display it.

Therefore, even if the computer is turned off, the display screen can still display the pre-set content. It is suitable for places where real-time requirements are not high.

Outdoor advertising screen-LED asynchronous control system

So, what are the advantages and disadvantages of these two control methods? The following editor will briefly analyze them.

Advantages and disadvantages of LED display screen synchronous control system:

The advantage is that it can play in real time and the amount of playback information is not limited

The disadvantage is that the playback time will be subject to certain restrictions and will change with the playback time of the computer system.

Once the communication with the computer is interrupted, the LED display screen will stop playing.

Advantages and disadvantages of LED display screen asynchronous control system:

The advantage is that it can achieve offline playback and storage information.

The playback information is stored in the control card in advance.

The disadvantage is that it cannot be synchronized with the computer, and the amount of playback information will be subject to certain restrictions.

The reason is that the storage capacity of the control card has a certain range and cannot be unlimited, which leads to the limitation of the amount of playback information of the asynchronous control system.

There are obvious differences between the synchronous control system and the asynchronous control system of the LED display, which are mainly reflected in the following aspects:

Synchronous control system:

Features:

This system ensures that the content of the LED display is fully synchronized with the content of the computer monitor, that is, the content played on the computer will be displayed on the LED screen in real time.

Operation:

It is usually necessary to install a computer near the installation of the LED screen or in the center of the computer room, and connect the computer and the LED display through a network cable to achieve synchronous display.

Application:

It is suitable for occasions where local or network video, pictures, text and other information need to be displayed in real time, such as indoor or outdoor full-color LED display.

Advantages:

It has the characteristics of real-time, complex operation, rich expression, etc., with an update rate of 60 frames per second, can achieve point-to-point display, and has the characteristics of multi-grayscale color display.

Disadvantages:

If the computer is turned off, the LED display will not be able to display any content, so the playback time is limited.

Asynchronous control system:

Features:

The content displayed on the LED display is not synchronized with the computer content in real time. It is necessary to set the video, pictures, text and other information to be played in the computer software in advance, and then copy them to the LED display through the U disk for playback.

Operation:

No need to install a computer near the LED display, the operation is relatively simple.

Application:

Suitable for occasions where text, symbols, graphics or animations are displayed, such as advertising screens, traffic guidance screens, etc.

Advantages:

Simple operation, wide range of use, even if the computer is turned off, the LED display can still display the content normally.

Disadvantages:

Limited storage space, limited playback content, and cannot change content at any time. If you need to change the content, you need to reset it in the computer software.

In summary

The synchronous control system is more suitable for applications that require real-time and high-quality display effects, while the asynchronous control system is more suitable for applications that do not require frequent changes in display content.