Originally Posted by juiceme (Post 1521809)

Any idea what's the root cause and physical phenomenon that this is based on?

From the description I understand that it is nothing like "burn-in" of old CRT's or plasma tubes which results from the same intensity of light being constantly exited off the luminence material which leads to physical wearing-out of the said material.

Also same kind of phenomenon might be possible on OLED displays where bright pixels are worn out, maybe via electomigration of the materials? However this also happens only when the same image is burned to the display for a long time...

But LCD's are a different thing, the colour change in pixels is achieved via polarization change of the material, and in these descriptions the image did not "burn-in" when the same image was shown for a long time but somehow instantly when the device rebooted spontaniously?
And is it so that the image was visible also when the device was turned off?

Originally Posted by coderus (Post 1521827)

for me it looks like video memory/framebuffer corruprion

Originally Posted by juiceme (Post 1521829)

Might look so, but then it would be cleared when the device is switched to POWER-OFF, hmm?

Originally Posted by coderus (Post 1521847)

well, probably, but mobile devices are powered always and who knows maybe video ram is also powered somehow while switched off :)