How to Choose the Right Pixel Pitch for an LED Display

The one rule that does most of the work

Pixel pitch is the distance between the centres of two neighbouring LEDs, measured in millimetres. The smaller the number, the closer a viewer can stand before individual LEDs become visible. A widely used industry rule of thumb is that a screen looks sharp from roughly 1 metre of viewing distance for every 1 mm of pitch.

So a P3 screen is comfortable from about 3 metres, a P4 from 4 metres, a P10 from 10 metres. This rule is a starting point, not a law: content type, brightness and viewer expectations shift it by roughly one pitch step either way.

Work out the viewing distance before the pitch

Buyers often start with the pitch because it is the number they saw in a specification. It is easier to start from the audience. Ask three questions:

• Where is the nearest viewer? The front row of a conference room is often only 3–4 m from the screen. A festival crowd stands much further back.
• What is on screen? Text and spreadsheets need roughly one pitch step finer than video. Live camera feeds benefit from a higher refresh rate as much as a finer pitch.
• What is the longest viewing distance? The furthest viewer sets the screen height you need, not the pitch.

Worked example: a 6 m x 3 m indoor wall

A hotel ballroom wall measuring 6 m wide by 3 m high with the nearest table 4 m away points at P3.91 or P4. At P4 the resolution is 1500 x 750 pixels — enough for video and presentation slides, and a good balance of cost. Dropping to P2.5 would raise the pixel count to 2400 x 1200 and the budget with it, without changing what the audience can resolve from 4 m.

The other numbers that matter as much as pitch

• Brightness. Indoor screens commonly run 600–1,200 cd/m². Outdoor screens need 5,000–8,000 cd/m² to compete with daylight; a screen facing direct sun needs the top of that range.
• Refresh rate. For camera work (broadcast, live streaming) choose 1,920 Hz or higher to avoid banding in the video. 3,840 Hz is available on better rental cabinets.
• IP rating. IP65 front and rear suits permanent outdoor installation. Rental cabinets frequently use IP65 outdoor with an IP31 indoor variant of the same platform.
• Service access. Front maintenance saves space in a wall recess; rear maintenance needs 600–800 mm of clear access behind the screen.
• Cabinet size. Cabinet dimensions decide the exact final screen size. A 500 x 500 mm cabinet cannot make a 6.00 m wall out of nothing — 12 cabinets give exactly 6.00 m, which is why cabinet maths is done before the order.

Common mistakes

• Buying a finer pitch than the audience can resolve, and paying for pixels nobody sees.
• Choosing a coarse pitch for close seating, which makes text look blocky and unprofessional.
• Forgetting that the finished screen is a whole number of cabinets, so the ordered size rarely matches the space exactly.
• Ignoring total power and heat: 5,000 cd/m² outdoor screens can draw 500–800 W/m² at peak.