Glossary A–ZLetter B
Burn-in
Burn-in describes an after-image that remains visible on a display after static content has been shown in the same place for a long time.
A distinction is made between temporary image retention, which fades after a while, and permanent burn-in. How susceptible a device is depends on its display technology.
Content that never changes is at risk: a logo in a corner, a fixed header, a clock, a table with an unchanging grid. On OLED displays, the self-emitting pixels age differently depending on use, which can leave permanent traces. LCDs tend to show temporary image retention, but can also be affected under unfavourable conditions.
Operators can prevent it by occasionally moving fixed elements, alternating backgrounds, switching the screen off outside operating hours and using the display’s protective functions, such as slightly shifting the picture. A common misunderstanding is that continuous operation according to the data sheet also covers still images. Whether burn-in is covered by the warranty is set out in the manufacturer’s terms.