There was someone on ars who wrote a java program that would "scrub" an LCD screen (changed the color of every pixel on screen rapidly). I can't remember who it was or what the name of the program was ...

OLED TVs produce exceptionally rich colors and deep blacks, due to the self-lit nature of each pixel. However, OLEDs come with one major drawback: screen burn-in, which is when an OLED TV's organic ...

You notice faint ghostly images retained on your Galaxy S23 display, even after changing screens. This permanent discoloration, called screen burn-in, can afflict the S23’s vibrant AMOLED screen.