The short answer
If your audience sits closer than about 5 m and the content includes text, logos or fine graphics, choose P3.91. If the screen is a large stage backdrop viewed from 8 m or more, P4.81 delivers the same visual experience for less money per square metre.
Both pitches are built into the same 500 × 1000 mm cabinet, share the same rigging hardware, and are stocked by almost every rental house. The difference is not the cabinet. It is how much detail the screen can resolve, and how close the audience can stand before the image starts to break up.
What pixel pitch actually changes
Pixel pitch is the distance between the centres of two adjacent LED clusters, measured in millimetres. A smaller number means more LEDs packed into the same area, which means more pixels and a finer image.
On a 250 × 250 mm module:
- P3.91 gives a 64 × 64 pixel grid, roughly 65,536 pixels per square metre.
- P4.81 gives a 52 × 52 pixel grid, roughly 43,264 pixels per square metre.
In practice P3.91 carries about 1.5 times the pixels of P4.81 over the same area. That extra resolution is what you are paying for, and it is the only thing that meaningfully separates the two products.
P3.91 vs P4.81 at a glance
| P3.91 | P4.81 | |
|---|---|---|
| Pixel pitch | 3.91 mm | 4.81 mm |
| Pixels per 250 × 250 module | 64 × 64 | 52 × 52 |
| Pixels per m² | about 65,536 | about 43,264 |
| Minimum comfortable viewing distance | about 4 m | about 5 m |
| Typical brightness, indoor rental | 800–1,200 nits | 800–1,200 nits |
| Typical brightness, outdoor rental | 4,500–6,000 nits | 4,500–6,000 nits |
| Cabinet options | 500 × 500 / 500 × 1000 mm | 500 × 500 / 500 × 1000 mm |
| Best suited to | Corporate, broadcast, close audiences | Large stages, long throw, budget at scale |
How to calculate the viewing distance
There is a simple industry rule that works well in the field: the minimum viewing distance in metres is roughly equal to the pixel pitch in millimetres.
- P3.91 → about 4 m before individual LEDs stop being visible.
- P4.81 → about 5 m.
That figure is the point at which the image stops looking like a grid of dots. For genuinely comfortable viewing — where the screen reads like a photograph rather than a display — double it.
A worked example. Take an 8 m wide screen. If the front row is 6 m back, both pitches are fine and P4.81 saves money. If the front row is 3 m back, P4.81 will show visible pixel structure and P3.91 is the correct choice. The screen size barely matters here; the distance from the nearest viewer decides it.
When P3.91 is the right choice
- The front row is closer than 5 m — conferences, product launches, boardrooms, exhibition stands.
- Content includes text, spreadsheets, logos or fine UI elements. Text is the first thing to break up on a low-resolution screen.
- The event is broadcast or streamed and the camera crops into part of the wall.
- Image magnification (IMAG) is used for speakers, so faces fill a large part of the screen.
A typical build is the EA1000H9 rental LED wall, which runs indoor P1.56 to P3.91 models at 700–800 nits behind a 140° viewing angle.
When P4.81 is the right choice
- The screen is a stage backdrop with the audience 8–15 m away or further.
- Outdoor festivals and large-format builds where you need maximum square metres per budget.
- The content is motion video rather than text, so fine detail is less critical.
- You are buying or renting at volume and the per-square-metre difference adds up across a tour.
The same EA1000H9 cabinet family covers outdoor P2.6 to P4.81 models at 4,500–6,000 nits, IP65 on the front face and IP54 on the rear. Because the pitch range sits inside one cabinet platform, a rental house can stock one cabinet design and swap modules instead of buying two separate product lines.
The camera question
Pixel pitch is not the only thing that decides whether a screen looks good on camera. Refresh rate matters more once a camera is involved: at 3,840 Hz and above, scan lines disappear from broadcast and phone footage. A 14-bit grayscale pipeline removes the banding that shows up in dark gradients.
Both P3.91 and P4.81 can be shot cleanly if the refresh rate is high enough. The reason broadcast productions still lean towards P3.91 is cropping headroom: a tighter camera shot on a P4.81 wall will reveal pixel structure sooner.
Can you mix P3.91 and P4.81 in one screen?
No. Different pitches use different modules and different pixel grids, so they cannot be combined inside one continuous screen. The seam would be visible immediately.
What you can mix is cabinet size within the same pitch. A 500 × 1000 mm cabinet and a 500 × 500 mm cabinet share the same 250 mm module grid, so they bolt together horizontally and vertically. That is how rental builds create a taller centre band, stepped edges or logo-shaped screens without custom steelwork.
The EA500H9 500 × 500 mm cabinet is the companion piece to the 500 × 1000 mm version for exactly this reason.
What this means for budget
P3.91 costs more per square metre than P4.81 because it carries more LEDs, more driver ICs and a denser PCB. The gap narrows at volume, but it never disappears.
There is a second cost that is easy to miss: more pixels means more processing. A P3.91 wall of a given size needs a controller with roughly 1.5 times the pixel capacity of the equivalent P4.81 wall. Check the controller before you commit, not after.
Frequently asked questions
Is P4.81 good enough for indoor events?
Yes, provided the nearest viewer is at least about 5 m away. For a hotel ballroom with a 10 m deep room, P4.81 is usually fine and materially cheaper. For a 4 m deep conference room it is not.
Can P3.91 be used outdoors?
Yes. Outdoor-rated versions of the same cabinet run up to 6,000 nits with IP65 front protection, which is what daylight visibility requires. Indoor modules should never be used outdoors, regardless of pitch.
Which is better for TV broadcast?
P3.91, for the cropping headroom. Both are acceptable if refresh is 3,840 Hz or higher.
Do both pitches use the same rigging and flight cases?
Within one cabinet platform, yes. The cabinets are the same size and weight class, so the same clamps, hanging bars and cases apply. That is a real logistics advantage for rental companies.
Tell us the distance, we will confirm the pitch
The decision comes down to three numbers: screen width, height, and the distance from the screen to the nearest seat. Send those three and we will confirm the pitch, the cabinet mix and the controller requirement for your build.
Send your brief through the contact page or email [email protected]. If you are still comparing screen types, start with the rental LED display range.