I’ve had my phone for some years and in the beginning I’d noticed something called screenburn where some elements of the screen always vaguely showed especially when I had my light settings all the way up and no blue filter mode on. With the blue filter and lower settings it doesn’t happen. But how do these screenburns even happen in the first place?
In: Technology
It’s different for different types of screens. For example OLED screens have separate little dots for each pixel that output red, blue, and green light. If you overuse one of the colors in one location it will wear out faster than the others.
The more common LCD screens shine a light constantly behind the whole screen, but use little “shutters” to block – or let through – different colors of light. In this case the light isn’t wearing out unevenly, but the part of the display that blocks or allows certain kinds of light will wear out in one area when it’s overused. Also the default for LCD screens it to let light through not block it, so if your blue color “wears out” it may allow too much blue, while OLEDs when worn out would produce too little blue.
Whether you observe this with certain screen settings depends whether the color that’s worn out is one that’s actually being used at that time.
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