I think this might be an easy app to create or modify the Flashlight HD app to rapidly cycle pure colors at full brightness. I used a Dead Pixel app on my Android phone and it fixed my black screen problem making all the black pixels a uniform darkness. The Stuck Pixel app in the HP catalog only works on the webOS phones.
I have some burn in from using Weather Dashboard in Exhibition mode. A pixel refresh / color cycling app would probably fix the ghosting.