Video walls and visualisation systems

The wall configuration follows from the task. The size and number of modules come from the viewing distance and the smallest character that has to stay readable from a workstation. Resolution is chosen so that sources display without scaling: a stretched image on a large diagonal is obvious at a glance. For rooms with strong daylight, brightness headroom is checked separately.

The bezel width between modules remains the most visible parameter. On professional panels it is measured in a few millimetres; on consumer screens the frame eats into the image and breaks the picture apart. Where any seam is unacceptable, LED screens or rear-projection cubes are used instead.

The support structure is designed separately. It carries the weight of the wall, allows each module to be aligned precisely in one plane and gives access to the panels for servicing. A misalignment of one or two millimetres at a joint shows up on a flat colour fill, so alignment is done against test images.

Once installed, the wall is calibrated: panels from the same batch still differ in brightness and colour temperature, and without matching them the wall looks blotchy. Calibration is repeated during scheduled maintenance, because the parameters drift with running hours.