What is an LED video wall.
One seamless screen, built from small LED panels, at any size.
If you have seen a giant screen behind a stage, above a showroom entrance or on a building face, you have seen an LED video wall. This guide explains how it works, what the numbers on a quotation mean, where it beats a TV or a projector, and what you need before buying one anywhere in India.
How it is built.
Every LED wall is made of three layers. Modules are small boards, commonly 320 × 160 mm, covered in pixels; each pixel is a tiny red, green and blue LED. Cabinets are frames that hold a group of modules with their power supply and a receiving card. Cabinets bolt together edge to edge into the size you want. A controller takes video from a computer, media player or camera and sends it to every cabinet.
Because the picture is made by the LEDs themselves, there is no backlight, no glass and no border between panels. That is why an LED wall can be 6 feet or 60 feet wide and still look like one screen.
The numbers on a quotation.
| Term | What it means | What to check |
|---|---|---|
| Pixel pitch (P1.5, P2.5, P4…) | Distance between pixel centres in mm | About 1 m of viewing distance per 1 mm of pitch |
| Brightness (nits) | How bright the screen can go | Indoor up to about 600 nits; outdoor up to about 4,500 nits |
| Refresh rate (Hz) | How often the LEDs are redrawn | High refresh avoids flicker on phone cameras |
| IP rating | Protection from dust and water | Outdoor: IP65 front, IP54 rear is a sound build |
| Cabinet size and material | The frame the modules sit in | Die-cast aluminium is light and precise |
| Controller | The box that feeds the wall | Its capacity must cover the wall's full resolution |
Every term is explained in the LED wall glossary.
Indoor and outdoor walls are different builds.
Finer pitches (P1.2 to P2.5) for people standing close, lower brightness so it is comfortable in a room, lighter cabinets. Lobbies, showrooms, halls, stages, boardrooms.
Coarser pitches (P2.5 to P6) for viewing from a distance, up to about 4,500 nits for daylight with auto-dimming at night, sealed cabinets against rain and dust. Shopfronts, hoardings, stadiums, forecourts. See outdoor LED.
A screen behind a sunlit glass shopfront is an outdoor problem even though it sits indoors: it needs outdoor-grade brightness.
LED wall, TV, LCD wall or projector?
Up to about 98 inch, indoors and read from close by, a commercial display is usually enough. Bigger than that, seamless, bright or outdoors, an LED wall is the right build. Projectors wash out in lit rooms. The full comparison is in LED wall vs TV vs commercial display and LED wall vs LCD video wall.
What you need before you buy.
Width and height available, and how far away the nearest viewer stands.
Indoors, behind glass or in full sun.
A wall or frame that can carry the weight. See weight and structure.
A power point sized for the wall and a cable route to the controller. See power use.
Who changes it and how often. Software such as PxlOS schedules it from a phone.
Questions.
What is an LED video wall?
An LED video wall is one large screen built from LED modules mounted in cabinets that bolt together. Each pixel is a tiny red, green and blue LED, so the wall has no glass, no bezels and no size limit, and outdoor versions are bright enough for direct sun.
How is an LED wall different from a TV or an LCD video wall?
A TV and an LCD video wall use a backlit LCD panel behind glass. A TV stops at about 98 inch and an LCD video wall shows black lines where panels meet. An LED wall makes its own light, is seamless at any size and can be built for outdoors.
What does P2.5 or P4 mean?
It is the pixel pitch: the gap in millimetres between pixel centres. Smaller pitch means a sharper picture up close. A rough rule is about 1 metre of comfortable viewing distance per 1 mm of pitch.
How long does an LED video wall last?
With proper installation, ventilation and power protection, LED walls run for many years. Brightness falls slowly over time, and failed pixels are fixed by swapping a module rather than the whole screen.
What do I need to install an LED wall?
A wall or structure that can carry the weight, a power point sized for the wall, a data cable route to the controller, and for outdoor walls proper earthing and surge protection. A site survey checks all of this before you order.
Keep learning.
Have a spot in mind.
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