Illustrative photo: large-format LED billboards. Viewing distance is what makes pixel-pitch choice matter. Photo by gtrwndr87, CC BY-SA 2.0, via Flickr
Nominal vs exact pitch
“P” stands for pixel pitch: the center-to-center distance between adjacent LEDs, in millimeters. Vendors round the number for marketing. The exact values we use in our comparison tables:
| Nominal label | Exact pitch (typical) | Examples in our database |
|---|---|---|
| P2.6 | 2.604 mm | Leyard LN2.6, ROE Topaz TP2.6, AOTO DL2.6, QSTECH C-Shine Plus 2.6 |
| P3.9 / P3.91 | 3.906 mm | Leyard LN3.9, ROE Black Pearl BP3 (listed as 3.91 mm) |
| P2.9 | 2.976 mm | Desay TR2.9 (2.952 mm, a non-standard variant) |
| P2.5 | 2.5 mm (often 2.583 mm) | Desay TR2.5 (2.583 mm, non-standard) |
Exact values as published by each vendor (verified 2026-09-26). Where a vendor publishes no exact figure, we show the nominal label with an asterisk (see methodology).
Why the rounding exists
- Module math. A 250 × 250 mm module at 2.604 mm pitch holds 96 × 96 LEDs; at 3.906 mm it holds 64 × 64. The “exact” numbers come from dividing standard module sizes into whole LED counts; marketing rounds them for sanity.
- Cross-brand comparison. Two cabinets both sold as “P3.9” can be 3.906 mm or 3.91 mm. The difference is invisible in practice, but our tables store the exact value so grouping stays honest.
- Non-standard pitches. Some vendors ship pitches that don’t match the common ladder (e.g. Desay’s TR2.5 at 2.583 mm and TR2.9 at 2.952 mm). We flag these as non-standard rather than filing them under P2.6/P3.91.
What to check as a buyer
- Always read the exact pitch in the spec sheet, not the series name, especially when mixing cabinets from different vendors on one wall.
- Pitch determines minimum viewing distance (≈ pitch in mm = meters) and LED count per square meter, which drives price.
- For camera work, pitch matters less than refresh rate and grayscale: a 3,840 Hz P3.91 can outshoot a cheap P2.6 on camera.