Screen Pixel Refresher

In short A pixel refresher drives every sub-pixel rapidly through its full range, which can clear light image retention by exercising the cells that have been sitting at one value. Ten to sixty minutes is the useful range for light retention; if several hours change nothing, the mark is permanent burn-in and no amount of running will help. That is the distinction worth establishing before you spend an evening on it. On safety, short sessions at moderate brightness are what televisions do to themselves — most OLED sets run exactly this kind of cycle automatically after a few hours of use, which is why interrupting a TV's own refresh routine is a bad idea. Running a refresher for many hours at maximum brightness is different: it ages OLED emitters unnecessarily and works against the thing you are trying to fix. Set the brightness to something moderate, run it for the shorter time first, and check the result before deciding whether another session is worth it.