TV Screen burn in?

Discussion in 'Archived Threads 2001-2004' started by Gerard Martin, Mar 17, 2002.

  1. Gerard Martin

    Gerard Martin Second Unit

    May 22, 2000
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    Recently purchased a 35" Sony DV TV

    that displays a large bright (something

    like 15 to 20% brighter) circle in the

    center of the screen particularly

    noticeable on blank screens. Is this

    what is called screen burn in and how

    do you think this might occur with a

    brand new set. An early reply sincerely

    appreciated. Thank you.
  2. Michael Reuben

    Michael Reuben Studio Mogul

    Feb 12, 1998
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    This doesn't sound like screen burn-in. I am moving this to Display Devices (TV/Projectors), where someone may be able to provide a more detailed answer.
  3. Allan Jayne

    Allan Jayne Cinematographer

    Nov 1, 1998
    Likes Received:
    THis is not screen burn in.
    It could be intended to get the viewer to focus on the middle of the screen, so that defects such as bad convergence at the corners are not so obtrusive.
    It could be due to thinner glass at the middle of the screen. This way the rear surface can be more curved to reduce focusing and geometry problems as the electron beam has to shoot further to hit the corners, meanwhile the front of the screen is flatter. (All TV screens nowadays are tinted, for one piece as opposed to bonded screens the thinner the glass the lesser the tint.)
    Also, making the glass thinner where structural strength is not needed as much reduces weight.
    To prolong the life of the TV and forestall screen burn in, keep the contrast under a half (direct view) and under a third (RPTV and FPTV).
    Video hints:
  4. Erik J

    Erik J Extra

    May 23, 2000
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    I've noticed something similar on my new Panny 51" RPTV. When the set is off there's a lighter color circle about a foot in diameter in the middle of the screen. Not sure why it's there, but it doesn't seem to affect the picture. It might have something to do with the glare screen.

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