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lcd owners or possible buyer beware

Discussion in 'LCD & LED LCD TVs' started by richanohx, Dec 4, 2004.

  1. richanohx

    richanohx
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    i have always been told that lcd tv products do not suffer screen image burn in but when i went in cuurys to look that them today a philips model i don't know which model. it was in 14:9 format with teltext on it. so i had a play turned it to 16:9 and turn the teltext off. when i did it had dim black bars down each side where the screen cut off in 14:9 mode and it also had a permanent 120 burnt in the top left hand corner from the teltext. so if lcd panels don't suffer screen burn what was the markins i saw.
     
  2. Skiny

    Skiny
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    LCDs do not suffer from screen burn. It is possible for the ghost of an image to be stuck on an LCD for a few seconds, maybe even a minute, but it is not permanent.

    Either that or you were looking at a plasma.
     
  3. scrapbook

    scrapbook
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    Don't forget that a tv on display at currys can't really be classed as normal viewing conditions. The TV will be on all day every day and generally with very high contrast levels.
     
  4. richanohx

    richanohx
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    it was definatly a lcd and the image burn as i call it. it was on the set for the whole 2 hours i was in there plus i put it on a chanel that was'nt tuned in to try and free it but no luck.
     
  5. .Griff.

    .Griff.
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    2 hours in Currys!!! Was it raining outside or something?

    As Skiny has said due to the nature of LCD technology screen burn on LCD's is impossible.
     
  6. dogastus

    dogastus
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  7. .Griff.

    .Griff.
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    One guys dodgy screen doesn't really prove the existance of screen burn on LCD's.
     
  8. Ultim8Fury

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    I still can't see how it happens. I was under the impression that R,G and B were subtracted from the white of the backlight by turning on and off the relevant sub-pixels.

    Surely image-persistance can only happen if the pixels have died in a fixed pattern, which strikes me as being most odd.

    ref the link above.

    wouldn't a black image have been better to display as that would force all pixels to be on to prevent the backlight being shown ?

    I'm genuinely curious.
     
  9. avanzato

    avanzato
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    IIRC the pixels in an LCD screen are controlled by capacitors or something that can retain a residual charge for a length of time. This charge will dissapate after a time if the screen is left off. The LCD doesn't instantly recover but it's not permanent damage to the screen like with Plasma or CRT. The guy in the article got rid of his 'burn' but still seems to want to say it 'could' be permanent. :confused:
     
  10. Ultim8Fury

    Ultim8Fury
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    Ahh now it makes sense.
     
  11. Skiny

    Skiny
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    I've had this "LCD screen-burn" on my monitor a couple of times before, but it was very faint, and went after a few seconds.

    It was the AV Forums logo and the blue bar at the top, stuck across my desktop.
     

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