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Plasma glow question

Discussion in 'Electronic Repair' started by [email protected], Dec 6, 2007.

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  1. Guest

    We just got a new Plasma TV last night. We had the TV on for about 5
    hrs and then turned off and went to bed. There was a strange glow on
    it. I thought it was just the electrons going down the energy levels
    and emitting some phospherescence or sthng???
    Anyway, I woke up at 5 30 AM and it was still glowing..
    ANyone know why?
     
  2. clifto

    clifto Guest

    You weren't watching ghost movies, were you?
     
  3. N Cook

    N Cook Guest

    ectoplasma
     
  4. PeterD

    PeterD Guest

    Well, remember those old radium watch dials...
     
  5. [This followup was posted to sci.electronics.repair and a copy was sent
    to the cited author.]

    Residual static charge? If it's cold where you are, do you have a
    humidifier? Plasma TV's need to keep the electrodes slightly charged to
    get a picture. Maybe your TV keeps them charged even when the TV is
    'off' for a faster startup?

    http://en.wikipedia.org/wiki/Plasma_tv

    Reminds me of what I used to do with a CRT TV years ago. I would close
    my eyes for awhile to get dark adjusted. I would then turn off the TV.
    You can then 'draw' on the screen with your finger for awhile.
     
  6. Meat Plow

    Meat Plow Guest

    I remember them and all the workers who painted the
    radium paint onto the dial and hands who got cancer
    because they put the brush between their lips to shape it into a fine
    point.
     
  7. AJ

    AJ Guest

    Another fine trick with CRT Monitors and Teles, Very dark room, take any
    flashlight and hold it against the face of the crt, shine the flashlight
    into the crt and then switch it off. The light from the flashlight will
    excite the phospher in the coating of the crt and make it glow, with a pen
    light you can even write your name or a message on the screen.
    electro-luminescence?? Cheers
     
  8. Turned off the cable box but not the tv?

    Mark Z.
     
  9. Jerry G.

    Jerry G. Guest

    Make sure your TV is being properly powered down, and it is not in a
    standby mode.

    The Plasma TV uses phosphors in the lumination cells. The phosphor in
    the cells is activated by UV rays that is generated from effect of the
    gas being ionized. After switching off, these cells may glow for a few
    minutes. The glowing effect should fade over a number of minutes
    until the next time the set is used.

    Some CRT sets will have phosphor glow for a few minutes after
    switching off. You can see this effect in a darkened room.

    Information about Plasma display technology:
    http://www.av-outlet.com/en-us/dept_120.html
     
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