All You Need to Know About LED Video Wall

Tips|Industry Information
Dec 08, 2023
LED video walls have become an increasingly popular technology for various applications in recent years. An LED video wall is a large display surface made up of multiple smaller LED panels or tiles that are put together in an array to form one seamless, gigantic screen.

LED video displays are used for advertising, events, command and control rooms, corporate lobbies, sports stadiums, concerts, exhibitions, retail environments, and more. With their bright, vivid displays and ability to be configured into any size and shape, LED video walls are the best way to convey visual information, grab attention, and create engaging experiences.

In this article, we’ll explore what LED video walls are, their components, how they work, what to consider when choosing one, and the many applications where they are being utilized today.

what is led video wall

What Is LED Video Wall?


An LED video wall is a special type of display device that consists of multiple smaller LED panels combined together to create a single large-format screen. The individual LED panels that make up the video wall contain their own self-contained pixels made up of clusters of red, green, and blue LEDs.

The panels are assembled together in an array, either horizontally, vertically, or both, and the content being displayed is spread across the entire video wall setup. This creates an extra-large seamless display surface, which can be configured into unusual or extremely wide aspect ratios for visual impact.

LED video walls are different from projector screens or other display technologies because the pixels are spread over multiple panels creating a single unified image. This modular design allows LED walls to be customized into unique sizes, shapes, and forms.

What Are the Components of an LED Video Wall?


An LED video wall system is mainly made up of the following primary components:

LED Modules</h3》
The LED modules are the individual building blocks of the video wall. They come in different standard sizes like 500mm x 500mm or 500mm x 1000mm. The modules house the LED pixels and internal electronics.


LED Cabinets</h3》
The LED tiles need to be combined together into the full array, which requires metal frames and mounting hardware. The cabinets get locked together for perfect pixel alignment.


Power Source</h3》
The power supply is a crucial component of an LED video wall, often likened to the “heart” of the display. Its significance lies in its immediate impact on the stability and safety of the LED display. A reliable power supply is essential to prevent issues such as fire, electric shock, and black screens.
Wire


The connectivity infrastructure of an LED video display incorporates various types of cables. These include data lines that establish connections between unit boards and control cards, transmission lines facilitating the linkage between the control card and computer, and power lines ensuring the interconnection of the control card, LED unit board, and power source.

Control System


The control system is responsible for processing and converting various backend signal sources into the video signal required for the LED screen. After processing, the signal is sent to the LED screen for point-to-point display or full-screen scaling.

led video wall system

How Do I Choose an LED Video Wall?


Choosing the right LED video wall involves carefully considering key factors like intended viewing distance, brightness, resolution, size, shape, refresh rates, grayscale and budget.

Size and Resolution


Carefully measure the intended installation area and calculate the optimal video wall size and resolution. The wall’s height is a major factor – for example, to be viewed from 25 feet away, the wall should be a minimum of 2.5-3 feet tall. Account for ceiling height restrictions too.

The wall’s resolution must match the viewing distance – for example, a wall with a 2.5mm pitch viewed from 10 feet needs a minimum resolution of 1920×1080 for seamless imagery. For 4K and 8K sources, the pixels per square meter need to be high enough. Get the right balance of size, resolution, and viewing distance.

Aspect Ratio


The aspect ratio of a display defines the proportional correlation between its width and height. A common example is the 16:9 aspect ratio, which has become the golden ratio for LED displays. However, the aspect ratio is a flexible parameter, and designs can theoretically adopt any ratio, whether it’s the more square-like 4:3 or 3:2, catering to diverse preferences and applications.

Pixel Pitch


A fine 1.5- 2.9 mm pixel pitch renders crisp details up close, while 3.9-10mm works for distance viewing. For bright outdoor conditions, the pitch may need to be slightly larger. Balance pixel density, viewing distance, and budget. Visit actual installations with various pitches to evaluate image quality before deciding.

led video display

Refresh Rate


The refresh rate of an LED display denotes the frequency at which the screen redraws the image per second. Measured in Hertz (Hz), a higher refresh rate signifies a more frequent refreshment of the image. In most cases, a refresh rate of 1920Hz suffices for optimal performance in LED displays. However, for scenarios involving high-speed action videos, a higher refresh rate, like 3840Hz, becomes imperative to ensure smooth and seamless visual experiences.

Grayscale


The grayscale of an LED display refers to the brightness intensity of the screen. In displays with higher grayscale levels, the colors in the darker parts of the image are still distinctly visible, resulting in a smooth color gradient and an overall clearer, more vibrant display effect.

Brightness


Consider ambient lighting to determine optimal brightness. Indoor walls generally need 600 to 800 nits, while outdoor screens require 7000+ nits in direct sunlight.

Control and Processing


Look for advanced video processing features like high-bandwidth video wall controllers that support uncompressed 4K/8K inputs at 60fps, advanced color calibration, pixel-level brightness and color adjustment, zone/region control, camera-based auto color correction, and synchronized playback.

Ensure the controller seamlessly handles any source from cameras to computers, supports HDR, and has low latency for live content. The system should be controllable via software, web interfaces, and APIs.
Installation and Service

Choose an established LED display manufacturer that can handle everything from design, sourcing, and installation to post-sales support and maintenance. Look for companies with proven experience installing complex multi-panel LED walls like permitting, electrical work, mounting, alignment, calibration, testing, and integration. Onsite support, maintenance plans, and training ensure the video wall provides years of reliable performance with minimal downtime.

Warranty and Support


Established LED display suppliers offer at least a 2-3 year warranty on parts like LED modules, power supplies, and video processing equipment to guarantee reliable performance. Multi-year warranties provide peace of mind for the significant investment in an LED video wall.

Ensure they offer maintenance, emergency onsite repairs, and replacement parts availability to maximize uptime. Onsite maintenance contracts provide optimal long-term support.

Conclusion


LED video walls offer huge creative potential with their modular scalable designs, vivid dynamic visuals, and reliability for 24/7 critical applications. When choosing an LED wall, carefully consider the size, resolution, pixel pitch, and other factors based on viewing needs and environment. With the right LED video wall system and partner, any organization can leverage this technology to deliver striking visual experiences that captivate audiences and effectively communicate ideas.
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