What the what? What is commonly called 'burn-in' is better described as 'image persistence' or 'image retention.' It results in a ghost of a bright image that was left onscreen too long. Technically, burn-in is a permanent form of image retention. Or, if you want to look at it the other way, image retention is a temporary version of burn-in. These distinctions are lost in current vernacular, but know that when most people talk about burn-in, they're really talking about image persistence/image retention. This is because when it comes to current-gen plasma TVs, actual burn-in is highly unlikely and extremely difficult.
How it happens Image persistence is caused by the that make the image in a plasma TV continuing to glow after being overly excited. Think of the phosphors in a plasma like kids. Once you get them riled up, it takes a bit for them to calm back down. Also like kids, as they age, they calm down much faster. As a plasma TV ages (after 100 hours or so), it becomes far more difficult to burn in. When you first get a plasma home, depending on the brand, model, and how you set it up, it's possible you may see some image persistence.
It might look something like this: Check your monitor or laptop's brightness controls. If this just looks like a black box, your brightness is set too low. You should be able to see a faint outline of.well, once you see it. Geoffrey Morrison/CNET Or this, if you watch CNN: The CNN logo, a stand-in here for nearly every TV network's logo.
In the early days of HDTV, these were often full-brightness. Geoffrey Morrison/CNET Here's a typical cable news channel with its multiple tickers and banners: I don't understand why people watch any cable news channel, but I guess that's a rant for a different article. Here you see an illustration of what the banners and tickers typical of the ilk look like 'burned in.' Geoffrey Morrison/CNET Keep in mind, these are all illustrations of the problem created by me to demo the effect. The reality is more subtle.
So, yes, if you leave a static image onscreen for a few hours, it's going to stay there for a bit. It is NOT, however the end of the world. Related stories.
It goes away Here's the most important fact about image persistence: unless you're overtly negligent, it's easily reversible. With what magic, you ask? Easy, just watch TV. Yep, that's it. Just go back to your regularly scheduled programming (full-screen, non-letterboxed television) and it will go away by itself. Just due to being used, the phosphors will get back in line.
Depending on the severity of the image persistence, it may take a few minutes or a few hours to go away. I recently left ESPN running for 6 hours on a plasma I was reviewing, just to test this very issue. Sure enough, after the 6 hours there was a faint ghost of their sportsball ticker at the bottom of the screen (visible when viewing a black screen). Ten minutes of different content (i.e. Without the ticker), and the image retention was gone.
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Though it can be frightening to see image retention if you've just bought a new TV, don't panic. Watch something else for a bit.
It should go away on its own with no further effort from you (and as I mentioned earlier, it becomes harder and harder to get image retention as the TV ages). Part of the hysteria around image retention/image persistence is that for many years it was a bigger issue. As plasmas improved, the evil-sounding 'menace,' ahem, persisted as manufacturers and stores tried to push their customers into more expensive LCD televisions ( ). Modern plasmas have better phosphors that are less likely to 'burn' in the first place. They also include features designed to lessen the chance for image persistence or remove it if it occurs.
An orbiter function moves the image around the screen by a few pixels. Hardly noticeable, but it minimizes some aspects of burn-in.
Full white or rapidly changing colored patterns excite the phosphors evenly, greatly reducing the time it takes to remove the effects of image persistence. LCD fanboys cry foul that these features are an admission by plasma TV manufacturers of a performance problem. To them, I say, what do you think?
They're an explicit attempt to 'fix' the motion blur problem inherent in all LCDs. There's no such thing as a perfect display, folks; you've got to take some good with the bad.
Personally I wouldn't buy plasma or LCD, but that's just me. I'll stick with my I say this not to boast, but to explain that I don't have a horse in this race. I'll review whatever technology comes my way and judge it on its own merits. I just can't stand misinformation, which explains pretty much. Oh, yeah, BTW, everything 'burns in' CRTs had burn-in.
And believe it or not, even LCDs can 'burn in.' The mechanism for LCD 'burn in' is different than with plasma/CRT/OLED, not least because LCDs don't have phosphors. They can exhibit image retention. It is less common, but still possible.
Don't believe me? When was the last time you were at an airport?
Find one of the departure/arrival screens. If they're not brand-new, I bet there's image persistence or burn-in regardless of the technology. I've seen this first hand with an LCD display recently, so it's not a myth. Related stories. OK, not everything has burn-in.
Can't, at least not in the ways we're discussing. More likely, a mirror will stick on or off, causing that pixel to be white or (hopefully) black. Work at it Can burn-in be permanent? But you've got to work really hard at it. As in, you have to either be trying to burn an image in, or be forgetful enough to leave a single image on the screen for days.
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Because you have to be exceptionally careless to cause serious burn-in, plasma companies' warranties don't cover it. They also won't cover throwing things at the screen, dropping it in the pool, or lighting it on fire. If you're worried about it, be aware that cable news channels are the worst, as are video games that have anything static onscreen (like a HUD, or stationary avatar). Letterboxed movies have the opposite effect, with the black letterboxes remaining dark while the movie image persists. Also, find on your plasma where the anti-image retention patterns/features are, and check out how they work. There are, but burn-in/image persistence shouldn't be one of them.
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It is much ado about nothing. OK, not nothing, as it's a real thing, it's just not the issue some people make it out to be. Lots more info.