At this stage, manufacturers are very aware of the potential issues and have already taken a number of intelligent steps to help avoid burn in. For starters, Samsung has been using its pentile subpixel arrangement (see above) in its AMOLED displays since the Galaxy S3. By making the blue subpixel larger, it requires less current to drive in order to provide the required light. Driving the LED with less current increases its lifespan, such that it takes longer for any noticeable color shift to occur.
This doesn’t directly address the issue of different parts of the screen aging at different rates, but it does mean that it will take significantly longer to notice than with older or cheaper OLED panels. More expensive and modern OLED panels are built with longer-lasting LEDs and well-designed layouts, meaning flagship smartphone displays age slower.
from Android Central.
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