What is a LED video wall ?

A video wall is basically a setup of multiple monitors or television sets or video projectors . They are tiled together to form one large display screen . LCD panels , blended projection screens , direct view LED arrays , etc. are used for video walls, led display screen for advertising.

Generally, video walls are used instead of a large display screen because of the ability to customize tile layouts , greater screen area per unit cost , and greater pixel density per unit cost . Video walls are generally found on airports , in stadiums , in concerts , control rooms , etc. The main function of a video wall is that it serves as an advertisement platform for large public venues . People can view it from long distances . For e.g. - the video wall at Mc Carran International airport .

It serves as an advertisement platform for approximately 40 million passengers passing through the airport annually . Another example of a video wall is the video wall in Oakland International Airport’s baggage claim is designed as such that people can view it from long distances . Video walls can also be used at smaller venues . It allows the people to view the screen at a long distance as well as up close . Distant observers can easily view pictures and it provides the nearby observer enough resolution to read the information displayed . For e.g.- the lobby of the Lafayette Library and Learning Center . Screens generally used for video walls usually have narrow bezels so as to minimize the gap between active display areas, and are built with long - term serviceability .

These types of screen generally have a built in controller / processor to split the display video or image across the number of screens in the video walls. Simple video walls can be operated from multi-monitor video cards . Complex video walls may need specialized processors which are specially designed to operate large video walls, Read More.

There is a device that splits a single image into different parts and displays it onto individual screens . It is called a Video Wall Controller /Processor . There are 2 types of video wall controllers / processors – 1.Hardware based controllers / processors . 2.Software based PC and video card controllers / processors. Hardware based controllers / processors are electronic devices built for a specific purpose . Usually, they are built on an array of video processing chipsets and do not have an operating system . The most simple hardware based video controller / processor is the single input, multiple outputs scaler .

It takes up only one video and then splits the image according to the number of displays on the video wall . The main advantage of the hardware based video wall controllers / processors is high reliability and performance . Although high cost and less flexibility is a disadvantage . Most of the professional video wall displays have a integrated matrix splitter or processor . (controller) .

This matrix splitter stretches the image from a single video input to all the displays in the video wall . Software based PC and video card controller / processor is a computer run operating system in a computer with special multiple graphic card feature . This approach is more expensive than the hardware based controller/ processor .

But this approach can utilize the full resolution of the video wall unlike the hardware processor . Matrix, Grid and Artistic layouts - Matrix grid layouts are often limited to 2 X 2, 3 X 3, 4 X 4, etc. identical displays. Here, the aspect ratio remains the same but the image is scaled across a number of matrix displays .

For more information about : indoor advertising led display screen.

More advanced processors enable grid layouts of any dimension (1 X 5, 2 X 8). Here , the aspect ratio of the video wall maybe different from the ratio of the individual screens or projectors . Some advance video wall controllers allow you to output to multiple displays on a video wall .

Transparent video walls is another type of a video wall. Transparent video walls combine multiple transparent LCD or LED screens to display video or images on a transparent video wall .