LCD "Image Persistence" - how long?

thor

thor

thor

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Bought an LCD HDTV about 4 months ago. After spending the last couple weeks playing Football Manager '07 on the 360 on the TV, there is a visible after image of the game present on the screen - basically two lines across the top of the screen and a red tinge (been playing as Atletico Madrid :p).

I've heard that with LCD's it's not really possible to burn an image like with a CRT for example, and it is in fact known as "image persistence" or "image retention".
My question is, how long is this image likely to persist? I left the TV displaying a no signal image (black/white specks, or "snow") for about 6 hours last night but the after image is still there :(

If the image wont go, am I likely to be able to get the screen replaced under warranty? I've read the manual and it does mention about image retention but says it is not permanent. Surely if it is permanent i.e. still there after a few weeks, I can claim it is a defect?
 
I remember being told by a sony rep a decent tactic to resolve 'screenburn'

if you can find a DVD or something with a perfectly white image, stick that on, pause it, and turn the contrast/brightness etc to max.. it should burn the image off...

not ideal... never tried it so could be urban myth... but worth a shot !
 
As a rough guideline, if it takes 6 hours to burn in the image, it will take 6 hours to remove it.

Strictly speaking to remove the image, you should display the negative image, but that isnt really practical, overall I guess a white image would be the best option.

I believe it will fade overtime if you just use the screen normally, as its basically the liquid crystal gets 'happy' it's position, but as you force it to change, it will gradually yield and go back to its original condition.

Just read you were playing it for several weeks, it's possible that it will take several weeks before all traces are gone. It wont be covered by the warrenty, image retention is a 'feature' of current LCD technology.
 
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