Pixel pitch is the distance between each cluster (pixel) of LEDs and is a common term in LED screen technology.  In the most basic terms, the smaller the pixel pitch, the closer the pixels are together, meaning the closer the viewing distance before the picture becomes pixelated (as it would do if you put your face very close to your tv).

Most manufacturers use something called ‘virtual pixel technology’ (or a variant of), which very cleverly shares LEDs between pixels, thus effectively doubling the resolution of the screen, so it is not uncommon to see an LED screen specification that says real 20mm, virtual 10mm.

For usual outdoor application, it’s important not to get too hung up on the pixel pitch of an LED screen as most such screens are around the 20mm (1omm virtual) mark and are perfectly suited for audiences over 4-5m away.

Pixel pitch becomes more important for indoor screens, particularly when likely to be viewed from very close up.  It’s not uncommon for screens with a pixel pitch of just 4mm to be used for such applications!