Yes, there are other phenomena which are similar to pixel retention but are only happening on LCD but not on OLED displays. One such phenomenon is called "image burn-in," which is a permanent discoloration of a display caused by the regular use of certain pixels more than others. It can occur with both LCD and OLED displays, but it is more common with OLEDs due to the way they work. This type of burn-in can be caused by displaying static images for a long time, such as navigation buttons, notification bars, or always-on displays.
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