Image retention may occur when a static image continuously displays for extended periods of time. A user may see a faint remnant of the image even after a new image displays. To prevent image retention:
Set the display to turn off after a few minutes of idle time.
Rotate background images on a periodic basis.
Turn off the display when the device in not in use.
Use a screen saver with the following characteristics:
background color set to black
use a small moving image (approximately 2% of the display size).
move the image randomly across the screen
screen saver should be active as long as the static image is used.