Pixel pitch is the distance in millimetres between the centre of one pixel and the next. The smaller the pitch, the finer the resolution and the closer a viewer can comfortably stand. A useful rule of thumb is to divide the pixel pitch by 10 to find the minimum comfortable viewing distance in metres — so a 2.5 mm pitch screen works well from 2.5 m or more. For boardrooms and close-viewing applications, 1.5 mm to 2.0 mm is typical. For lobbies, event stages, and general signage, 2.5 mm to 4.0 mm is usually appropriate. For large outdoor displays viewed from distance, 4 mm to 10 mm is common and significantly more cost-effective.
