When Viewing An Image of Star-Filled Night...

Discussion in 'Displays' started by Rus Bowisc, Aug 4, 2003.

  1. Rus Bowisc

    Rus Bowisc Stunt Coordinator

    Joined:
    Jul 18, 2003
    Messages:
    50
    Likes Received:
    0
    I have a one-month old Sharp 32" (32F631) TV and used Avia to calibrate.

    I am noticing something a bit strange.
    When watching a DVD movie that had a night-shot of a star-filled sky... the stars looked more like red and green, slightly blinking dots, or sometime having a "white hot" appearance.

    I also noticed this pretty much on some shots where a white object was surrounded by black.

    I'm viewing with "vertical compression" on and using component video (Monster mid-range cable). It doesn't seem to happen when vert. conp. is turned off, but I am not 100% sure about it.

    Any thoughts?
    Is this something that I should expect with a relatively inexpensive ($550) tube? My $100 DVD Payer (Tosh. SD-3900)?


    Rus
     
  2. Jack Briggs

    Jack Briggs Executive Producer

    Joined:
    Jun 3, 1999
    Messages:
    16,740
    Likes Received:
    129
    The phenomenon may very well be the result of the cinematography in the film itself, an "effect." If it's one of those rare "space movies" that actually attempts to get it right, then bear in mind that stars shine at all colors in the visible spectrum (from red to blue-white).
     
  3. Rus Bowisc

    Rus Bowisc Stunt Coordinator

    Joined:
    Jul 18, 2003
    Messages:
    50
    Likes Received:
    0
    I don't think it is normal display... it's noticeable on many DVD material. Seems that certain tiny "white" colors have a "hot" appearance to them at times... kind of an over-exposed appearance on areas in the film that have hightlights. It is difficult to explain. I'll try to post in picture of what I'm referring to.

    Thanks for your response.

    Rus
     
  4. Gregg Loewen

    Gregg Loewen Video Standards Instructor, THX Ltd.
    Insider

    Joined:
    Nov 9, 1999
    Messages:
    6,379
    Likes Received:
    32
    Location:
    New England
    Real Name:
    Gregg Loewen
    Your contrast is probably set too high??? (and I say that almost catagorically ) :)
     
  5. Rus Bowisc

    Rus Bowisc Stunt Coordinator

    Joined:
    Jul 18, 2003
    Messages:
    50
    Likes Received:
    0
    On my TV, here are available parameters... settings are in parenthesis.

    PICTURE (25... 1/2 of Max.)
    SHARP (0... minimum setting)
    BRIGHTNESS (22... 1/2 of Max.)
    COLOR (17... tad less than 1/2 of Max.)
    TINT (MIDDLE = 0)
    TEMP (LOW)

    I'm guessing that "contrast" would be the same as "sharp"?

    Rus
     
  6. Jason Charlton

    Jason Charlton Ambassador

    Joined:
    May 16, 2002
    Messages:
    3,515
    Likes Received:
    377
    Location:
    Baltimore, MD
    Real Name:
    Jason Charlton
    Actually, I'm pretty sure that "picture" = "contrast". You'll want to reduce it even further - perhaps down to 25% or less. Reducing it to this low a level may take some getting used to - but give it some time and your eyes will adjust (plus you'll be doing a great service to your set, prolonging its life).

    -Jason
     
  7. Rus Bowisc

    Rus Bowisc Stunt Coordinator

    Joined:
    Jul 18, 2003
    Messages:
    50
    Likes Received:
    0
    Thank you Jason, I will give it a try.
    However, using Avia yielded best results at this setting.

    I'm wondering how one setting affects others. For example, decreasing "picture", and increasing "brightness"... etc.


    Rus
     
  8. Jack Briggs

    Jack Briggs Executive Producer

    Joined:
    Jun 3, 1999
    Messages:
    16,740
    Likes Received:
    129
    Those settings are interactive, in the sense that adjusting the contrast means you might have to tailor the "brightness" accordingly.
     
  9. Rus Bowisc

    Rus Bowisc Stunt Coordinator

    Joined:
    Jul 18, 2003
    Messages:
    50
    Likes Received:
    0
    I have spent some more time adjusting the "picture" settings, and still... the issues remain. I see it during DVD as well as TV material.

    If I can explain some more, this is what I see. Seems when there are two contrasting colors, the outline seems "jagged", kind of flickering. This varies depending on the material being viewed.

    Someone posted that a particular model of "Sharp" TV was too sharp, even at the lowest setting. I regret to think that this is the case with my TV.

    Is it possible to have a professional individual make adjustments? Will this be a very expensive "tweak"? Anyone in the NYC tri-state area that comes recommended?

    I know... what can I expect for a TV set under $600, but I really thought I was getting something "ok" for my money. Too late to take it back.

    Thanks for input on this friends.

    Rus
     
  10. Rus Bowisc

    Rus Bowisc Stunt Coordinator

    Joined:
    Jul 18, 2003
    Messages:
    50
    Likes Received:
    0
    Is it possible to have a professional individual make adjustments? Will this be a very expensive "tweak"? Anyone in the NYC tri-state area that comes recommended?


    RUs
     
  11. Rus Bowisc

    Rus Bowisc Stunt Coordinator

    Joined:
    Jul 18, 2003
    Messages:
    50
    Likes Received:
    0
    Anyone?
     
  12. Bob Maged

    Bob Maged Stunt Coordinator

    Joined:
    Aug 9, 1999
    Messages:
    173
    Likes Received:
    0
    Professional calibration would cost at least a few hundred dollars -- not really worth it for a $550 TV. Have you tried getting warranty service? From your description of the problem it sounds like it may be a convergence problem. (I always considered myself to be technologically aware but only discovered a few months ago that direct view CRT displays have separate red, blue, and green "guns" that can become mis-converged.) Try calling Sharp for a service appointment.
     
  13. Scott Kimball

    Scott Kimball Screenwriter

    Joined:
    May 8, 2000
    Messages:
    1,500
    Likes Received:
    0
    Could also be Velocity Scan Modulation.

    If you have a setting labeled as such, or as VSM or SVM... turn it off. This setting is for edge enhancement, and is generally not desired.

    -Scott
     
  14. Rus Bowisc

    Rus Bowisc Stunt Coordinator

    Joined:
    Jul 18, 2003
    Messages:
    50
    Likes Received:
    0
    Thank you all... I guess I am stuck with this until I can upgrade to a real screen.

    [​IMG]

    Rus
     

Share This Page