LED Wall Basics Every AV Tech Should Know

LED walls went from specialty gear to standard in about five years. If you're a general AV tech who hasn't worked with them yet, you will soon. Here's the baseline knowledge you need.

Pixel pitch matters

Pixel pitch is the distance between LED pixels, measured in millimeters. Lower number = higher resolution = more expensive.

• P1.5–P2.5: Indoor corporate, close viewing distance (under 15 feet)
• P2.9–P3.9: General purpose, mid-distance
• P4.8–P6: Outdoor, large venues, far viewing distance

The rule of thumb: minimum viewing distance in feet roughly equals the pixel pitch in millimeters times 3. A P2.9 wall looks great at 9+ feet but pixelated at 4 feet.

Processing is not optional

Every LED wall needs a processor between the content source and the panels. The processor maps your input resolution to the physical pixel layout of the wall. Common processors: Brompton Tessera, NovaStar, Colorlight.

The processor also handles:

• Color calibration across panels
• Brightness control
• Input switching
• Genlock for broadcast

Rigging an LED wall

LED panels are heavy. A 10x6 wall in P2.9 can weigh 1,500+ pounds. You need:

• Adequate rigging points rated for the weight
• Ground support or fly frames
• A certified rigger (this is not a stagehand task)
• Redundant safety cables on every panel

Common mistakes

1. Wrong pixel pitch for the room. P6 in a 30-foot ballroom looks terrible.
2. Not color-calibrating. Panels from different batches have different color temperatures. Calibrate every time.
3. Ignoring moiré. Camera operators shooting LED walls get moiré patterns. Adjust the wall's refresh rate and the camera's shutter speed to eliminate it.
4. Forgetting backup processors. If your single processor dies, the wall goes dark. Always carry a spare with a pre-built config.

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LED work pays a premium because the gear is expensive and the margin for error is small. Learn it now while the demand is still outpacing the supply of qualified techs.