I'm going to assume that your wife read something on "burn in".
First off, if you have a LCD TV, you shouldnt have to worry about burn in.
However, all phosphor based display systems (CRT and plasma TVs) are susceptible to image retention also known as "ghosting, image shadowing, or burn in". Burn in is caused by leaving a static image on the screen for a long period of time which causes
damage to pixels by prematurely aging phosphors which therefore glow less intensely than those of surrounding pixels on a plasma or CRT TV screen. The damaged or "burned in" pixel develops a "memory" of the color information that was repeatedly fed to it in a static manner over a period of time. And that phosphor color information has actually become seared or etched into the plasma TV glass.
For the past couple of years the resistance of plasma TVs to "burn in" has been greatly improved. Many manufacturers us a technique called motion adaptive anti burn in technology, which causes static images on the screen to constantly move so slightly that the movement cant be detected by the human eye but still moves the image enough to cause color changes in the pixels. A second technique used by some manufacturers is improvement in the phosphor gas itself in order to make it more resistant to burn in.
As a result of these advancements, a couple of prominent manufacturers now claim that plasma TVs have the same burn in resistance and susceptibility as CRT TVs.
In my opinion, burn in isnt near the problem that its been made out to be. The only places that I have personally witnessed it are in places like airports where they've used an older plasma TV to display flight information (so 24 hours a day, 7 days a week of static images and on older generation plasmas) and on older projection TVs used for gaming. I admittedly dont own an HDTV yet, but the reason I dont is because my 32 Toshiba CRT TV still works perfectly fine after 15 years and I just cant see spending money to replace it until it dies. My Toshiba has seen countless hours of gaming over these last 15 years and has not experienced any burn in.
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