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Toshiba 42" RPTV- wierd 3d after-image effect.

Discussion in 'TVs' started by nathan_silly, May 8, 2003.

  1. nathan_silly

    nathan_silly
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    I've just watched the Cave Troll sequence in LOTR. On some of the very fast cameras pans the objects-trail looks like this..

    http://www.johnsonshawmuseum.org/newsletteranim-3d.gif


    I've fully converged the set. Is it because the camera is panning faster than phosphor can dissipate I'm seeing this?

    Roland- any help?

    Thanks
     
  2. Rojo

    Rojo
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    oddly enough, I noticed the same thing on my 28" Goodmans. It was subtle but there and only on the fast pan shots.

    I'm currently upgrading to 36zp38. Do you use component at the moment, Nathan?

    I found using a monster scart reduced the effect to completely unoticable - but that may be because the screen is so small compared to your Tosh.

    I'm no expert, it may be due to the fact the interlaced image is moving so quickly that there is a phosphor trail. Maybe with a progressive signal it s not an issue - but that isn't option for your Tosh, I don't think.

    Hope there's a solution.
     
  3. nathan_silly

    nathan_silly
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    I'm using component.

    It's noticeable for about 20 seconds just before Frodo gets stabbed in the chest. There's alot of NYPD blue type camera panning- very fast.

    I've used my set for a while now watching DVD's and I've never seen this before- been trying out various action films and no problems what so ever, just that LOTR sequence showed it up for the first time.

    Not a big deal I guess.
     
  4. alexs2

    alexs2
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    Interesting nathan....I have a 50WT29B Toshiba RPTV and haven't noticed this effect on that sequence(we've seen it probably too many times as the kids like it!).
    It does sound very much like the phosphors retaining a little of the fast moving image,and progressive scan wouldn't remove the problem(even if our sets had it) as this is a product of the decay time of the phosphor.
    BTW...I also use component inputs.
     
  5. nathan_silly

    nathan_silly
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    I guess the 100hz models would be the same... how would 100hz sets get round this problem? It probably can effect other technologies as well- LCD & Plasma.

    It's noticeable just as the Troll has suprised Frodo, Frodo falls (trail here) and Aragorn grabs the pitchfork, and stabs the troll (here as well)

    I wonder because it's so dark it exaggerates this effect?

    btw LOTR is the R1 version 4 disc version
     
  6. bobones

    bobones
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    Watched the same sequence (R2 ext version) on my Sony KP44PS2 (100Hz RPTV) and didn't notice anything amiss.

    If it were a phosphor decay issue I'm sure you'd have noticed the effect with other discs. Try renting the R2 disc and see if you see the same thing.
     
  7. alexs2

    alexs2
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    Mine is one of the 100Hz models nathan....no ghosting/image residuals.
     
  8. nathan_silly

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    I've just played that scene again.

    The 3D trail is now disappered. It looks normal. Very strange!
     
  9. Paul D

    Paul D
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    You didn't have video noise reduction on did you?
    I've heard this can leave streaks/trails on the picture etc.
    Just an idea i had before you posted that it's fixed!
     
  10. nathan_silly

    nathan_silly
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    Nope. Changed nothing.
     

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