Editing Cathode-ray tube (section)

===Burn-in===
{{Further|Screen burn-in#CRT}}
Burn-in is when images are physically "burned" into the screen of the CRT; this occurs due to degradation of the phosphors due to prolonged electron bombardment of the phosphors, and happens when a fixed image or logo is left for too long on the screen, causing it to appear as a "ghost" image or, in severe cases, also when the CRT is off. To counter this, [[screensaver]]s were used in computers to minimize burn-in.<ref name="auto33">{{cite web | title=PERSONAL COMPUTERS; How To Avoid Burn-In | website=The New York Times | date=1991-04-02 | url=https://www.nytimes.com/1991/04/02/science/personal-computers-how-to-avoid-burn-in.html | access-date=2020-12-11}}</ref> Burn-in is not exclusive to CRTs, as it also happens to plasma displays and OLED displays.