Display burn-in refers to a permanent discoloration of areas on an electronic display such as LCD or OLED screens. It is caused by the prolonged display of the same image or scene, leading to uneven wear of the pixels. For example, if a static image, like a logo or menu bar, remains on the screen for an extended period, its outline may remain visible even when new images are displayed. 'Image persistence' or 'Ghosting' can sometimes be confused with burn-in, but these are usually temporary and can be resolved by turning the display off for some time. 'Dead pixels' do not constitute burn-in; instead, they represent individual pixels that are no longer functioning. 'Color distortion' suggests a problem with color output, which may not necessarily be related to permanent damage from static images.