Screenburn has long been a problem that has plagued our screens - why else would we have bothered to invent screensavers?
Though long ago most people made the switch from cathode ray tubes to LCD screens, the burning-in of persistent on-screen images can still happen. But it happens for slightly different reasons. Rather than the screen being burnt, when an LED or OLED burns, it is because of "luminescence degradation" - the pixels become enable to return to their original state.
And this even impacts our handheld gadgets. Even our smartwatches, as after all, they spend most of the time displaying the image of a clock.. So what do they do to avoid it?
Brilliantly, YouTube Mike Barrett used his Nexus 5X to capture this timelapse video of a Huawei smartwatch tackling the burn by subtly shifting about the exact position of the watchface. This is something that would be imperceptible if you were to look at the watch yourself - but in timelapse reveals the clock has the jitters.
You can see the full video below, and then spend the rest of the day staring at your wrist trying to spot the moment it jumps.