See all articles from Quantum Levels v2 n5
Every schoolboy knows that you shouldn’t leave your monitor or TV screen standing idle for a long time with a static pattern on it. (That’s why the TV people caution you not to leave your MUTE command in effect for a long time–turn the volume down instead.) Anyone who ignores this warning is in danger of suffering phosphor burn-out–the part of the monitor (or TV) screen that is illuminated by the electron beam (the bright areas, that is) wears out faster than the rest of the screen, and the screen sooner or later takes on a permanent impression of the pattern.