iOS 11 includes software to avoid burn-in on iPhone X OLED screen
In digging through the iPhone X firmware leaked over the weekend, we have found one more small tidbit: reference to a burn-in mitigation feature for the OLED screen.
[...] Whilst LCD panels can experience it too, OLED panels currently on the market are especially prone to experiencing burn-in on the display: where a faint ghost image sticks around for a long time.
[...] Some Samsung phones use pixel shifting techniques to subtly change the position of content on the screen to limit the amount of time a pixel is constantly displaying the same color.