Rainbow Effect

A visual artefact that can occur with some cheaper (single-chip) versions of DLP televisions and projectors, in which brief flashes of perceived red, blue, and green 'shadows' may be seen - most often when the projected content features bright objects on a dark background. This effect is particularly noticeable when the viewer pans their eyes across the image. It can lead to eye strain, headaches, or migraines after as little as a few minutes of viewing.

New LED based DLPs can produce the alternating images fast enough so that most people will not be affected by the rainbow effect.