A video wall is judged from three metres by everyone who walks past it, which is why it is the one place we will argue for spending more. Get the canvas, the content and the commissioning right and it carries a brand for a decade. Get any one of them wrong and it is an expensive grid of mismatched rectangles.
Most people specifying a video wall worry about the seam between panels. It matters, but it is rarely what ruins the result. What ruins the result is colour: a wall of LCD panels from different production batches will not match, and the mismatch is obvious the moment you put a flat brand colour across all of them.
The second thing is content. A canvas that is 5,760 pixels wide and 2,160 tall is not a 16:9 video stretched sideways. If nobody masters content at the canvas resolution, you have bought a very large way to display a blurry logo.
Two kinds of wall, and when each is right
LCD panel array
Commercial panels with narrow bezels in a grid, typically 2x2 up to 4x4. Lower cost per square metre, serviceable panel by panel, and excellent where viewers are more than three metres away. The seams are always visible up close.
Direct-view LED
A genuinely seamless canvas at any size or shape, brighter, and with no grid at all. Costs more, needs more structure and power, and the pixel pitch has to be matched to the closest a person will stand. This is what a reception wall should be.
What we do that a screen supplier does not
Measure the real viewing distances in the room, and pick pitch or panel size from that rather than from a budget line
Check the wall and the structure will take the load, and involve an engineer where they should be involved
Specify the processor and the cabling, not just the panels — this is where most walls fail
Colour-calibrate the finished wall so a flat brand colour is actually flat
Master the content at the canvas resolution, in the canvas shape, so nothing is stretched or letterboxed
Commission out of hours, and hand over an as-built record with every panel and cable documented
What a wall can carry
These are live renders, not photographs. A wall rarely does only one job — brand loop through the day, live data at shift change, and an override that takes over instantly.
Brand loop
Live operations
Communications
Questions people actually ask
What size video wall do we need?
Work backwards from the furthest viewer and the smallest thing they must read. As a working rule, body text needs to be about one two-hundredth of the viewing distance in height, so a person eight metres away needs characters around 40mm tall. That sets the canvas height, and the content shape sets the width. We do this measurement on site because ceiling height and sightlines usually change the answer.
Is LED always better than LCD panels?
No. LED is better when people get close, when you need a shape that is not a rectangle, when the room is bright, or when a visible grid would undermine the whole point. LCD is the better value when viewers are further away, the budget is fixed, and the wall is one part of a larger network rather than the centrepiece. We have talked customers out of LED more than once.
How long does a video wall last?
The panels or modules typically have a long service life, but the honest answer is that the processor and the player usually date first, and the content dates fastest of all. We plan a refresh path from the start so you are replacing one layer at a time rather than the whole wall at once.
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Related
LED displays
Indoor fine-pitch, outdoor and high-bright LED, specified to viewing distance and ambient light.