TFT Displays don't burn in the same way as CRT displays. There's no danger of permanent burn in on TFTs. LCD TV-Sets easily show a ghostly image, if you let them stay to long on the same picture (e.g. Videotext), but this disappears, if you turn the TV off for 10 or 15 minutes. On TFT PC-Monitors, I never saw any kind of ghosting images and I don't saw this effect ever on any LCD handheld.
BTW You should edit the Thread Name, it's misleading