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Join Date: Apr 2006
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Since it is a a display that is based on organic chemicals that emit light when an electrical current is passed through them, yes they could suffer from burn in. Plasma uses phosphors that emit light when exposed to UV radiation and has this issue.
As some areas of the screen are used more in a pattern such as a channel logo or such, there could be burn in since the light emitting elements in that area are aged differently.
I don't know if there is any evidence of BI on OLED yet, but I have not been looking for information on it. Right now the only people who would know would be the people who bought the Sony OLED set last year and may be seeing some evidence of it.