re: Samsung to end plasma TV production this year.

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I have a 4 year old Panasonic plasma, and I have never had a permanent burn in. It might have a tempory image remnant after turning off an auxiliary device. However, it goes away within moments, and doesn't show up during programs.

My understanding was that burn in was only a problem on much older plasmas.

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True burn-in is rare in more recent models, if it occurs at all.

Image retention OTOH was a notable problem on the 2012 (50 series) and 2013 (60 series) Panasonics. High contrast channel logos, clock displays, etc can cause IR within minutes that can last hours, and watching a whole game on ESPN can cause IR lasting days to weeks. The Cartoon Network logo is also said to be very bad.

The good news is that it does fade, and it usually isn't visible, showing up mainly in light backgrounds of fairly uniform color. The Screen Wipe feature can help fade it, and so can things like Disney WoW's Pixel Flipper. As for the TV's pixel orbiter, all it can do is feather the edges a little bit; IOW, it's essentially useless. The sets may become more resistant to IR with age, and I'm talking several thousand hours of viewing.

Here's a pretty infamous article from a couple years ago:

LINK

Ultimately, IR is not a huge problem unless you have a particularly bad sample and you leave it on ESPN or something else with static logos all day. If you watch a variety of material, it's usually not a problem.