WhatsApp:+86 -1866 -5800-742 info@doitvision.com

Different Between Synchronous and Asynchronous Led Display?

by | Mar 1, 2024 | Blogs | 0 comments

LED display screens are quite commonly used and highly familiar in the business and media industry today. However, many people are still unaware of many of its aspects and its working criteria, especially when it comes to the different types of LED displays. Since different types of display screens work differently, it’s hard to relate every screen and choose LED display without having the proper knowledge.

Now when it comes to getting confused in LED display screens and their different types, two are quite commonly confused. This includes both the synchronous LED display and the asynchronous LED display. Whether you’ve planned to invest in a LED screen or you’ve just felt the need to have an understanding of these screens, these two terms have been obvious to create confusion for many.

Synchronous LED display

Therefore, this lack of understanding might often result in the wrong LED screen investment. However, that’s not something you need to worry about, as we’re here to help you eliminate all this confusion and have a clear view of what both these LED displays are and how they differ. So let’s go ahead and discover these screens and their characteristics below in detail.

Synchronous System

As the name says here, these screens are simply supposed to display what the computer screen displays. In short, it shows a real-time display of the computer screen which is connected to it for showing a display of pictures or videos. Additionally, since it works with the computer, there are no limitations of content that can be displayed on these screens. So you can set up constant videos or different content on the computer screen (and continue doing that), while the synchronous LED display would show the same.

Even though this sounds amazing, there is a drawback to these screens too. This is the lack of working on these screens after the computer shuts down. Hence, if the connected computer doesn’t work properly or shuts down anytime, the screens would also not display anything normally.

Now for a clearer view, let’s discuss some of the characteristics of the synchronous LED display.


  • These screens come as either 4K LED Displays or otherwise, indoor LED video walls. Both these displays come with a space to place the computer for the graphical operation.
  • These types of LED display screens are widely used as rental display screens for different kinds of events, i.e. weddings, parties, concerts LED screen, etc.
  • They are built as large display screens for both indoor and outdoor usage.
  • You can find plenty of creative and special designs on these LED screens.

Asynchronous System

The asynchronous LED display works as the opposite of the previous screen. This simply means that it doesn’t display the same content that is being played on the computer screen. In short, you can say that the graphical display of this screen is firstly edited on the computer. After this, it is sent to the screens control card. Hence, all the display information is saved on the screen and played directly, so there are no complications faced even when the computers stops or shuts down.

However, this also means that there is no real-time displaying feature or unlimited content option on these screens. So you have to work on the content earlier and finalize what needs to be finally played on these screens.

Now let’s discuss some characteristics that add more to making these asynchronous LED display screens different from the previous ones includes.


  • These outdoor LED display screens are installed in places where there is no control room present for managing the computer.
  • These screens come as just a single color LED front door signboard.
  • They aren’t available in a larger size, so you can find them as small LED screens.

The difference between synchronous and asynchronous in LED display

Here are the differences between synchronous and asynchronous LED displays based on control method, usage scenarios and connection requirements etc.

FeatureSynchronous LED DisplayAsynchronous LED Display
Control MethodOnline control; content is synchronized with the computer displayOffline control; content is pre-loaded and displayed independently of a computer
Usage ScenarioFull-color or large-area two-color displaysSingle-color or small-area two-color displays
Connection to ComputerRequired at all times for real-time content updateNot required for display once content is loaded
Content UpdateReal-time via network cable or optical fiberThrough RS232, U disk, and network cable, without real-time update
Storage CapacityUnlimited (depends on computer hard disk space)Limited by the storage capacity of the asynchronous card
Display EffectsSupports special effects, animation, streaming media (video) playbackLimited special effects; does not support streaming media (video) playback
Operational RequirementComputer must be running at all times during displayComputer only needed for content update, can be turned off afterwards
CostHigher due to the need for continuous computer operationLower, as it can operate independently of a computer
Transmission Distance– Cat 5 network cable: 100 meters – Multimode fiber: 500 meters – Single-mode fiber: 10 km– RS-232: 120 meters theoretically, 60 meters stable – RS-485: 1200 meters
Computer Configuration RequirementsIntel P4 1.7G or higher, 256M RAM or more, COM port, AGP slotIntel PIII 1.2G or higher, 128M RAM or more, COM port
Advantages– No limit on program content storage – Convenient program editing – High-quality picture display– Can be used offline – No effect on display from computer shutdown or other software use
Disadvantages– Increased cost due to the need for the computer to run continuously– Limited program content storage – Fewer display effects – Content editing is less convenient – Poorer picture quality


With each of these screens having different characteristics, it’s can be understood how different both the synchronous LED display and asynchronous LED display screen are. Hence, you can better understand what is better for your business demands and media requirements.

However, even with these differences, none of these screens are superior to the others in terms of market demands. Since both the small scale business and large scale business, rely on LED display screens for better promotion of their business. Therefore, both these LED display screens are widely opted and relied on for business promotion, and indoor/outdoor display needs in all types of businesses and industries.

About the Author

Kris Liang

Kris Liang

Founder/LED display expert

Kiris Liang is the founder of Doitvision. 12 + years in LED visual industry. Full passion of LED, product designer & chief salesman. Looking for teammate of technical/ marketing / sales.

Connecting people relative with LED displays.

Email: kris@doitvision.net