Advantage of 16:9 panel over 16:9 mode?

Discussion in 'Projectors, Screens & Video Processors' started by Electric Mayhem, Nov 21, 2001.

  1. Electric Mayhem

    Electric Mayhem
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    As above what are the advantages/differences??

    As an example : Sanyo PLV 60 vs Sanyo PLV 30.

    The 60 has a true 16:9 panel vs the 16:9 mode of the 30.

    What benefits are we getting??

    If someone could explain the technical side in laymans terms.

    cheers
     
  2. LV426

    LV426
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    People's perception of size is determined more by height than by width. For example, a person's head which just fits into a 4:3 picture will be the same size as the same head on a 16x9 or wider picture, provided the picture's height is the same.

    In order to fit a 16x9 image into a 4x3 panel, you have to reduce the image height. That is what 16x9 MODE does. Depending on your screen setup and the zoom abilities on the projector, this may mean that 16x9 images are "smaller" (by the above definition) than 4x3 ones. Or, of course you could always zoom the image up to the same height.

    Which brings me to the second and more important point. It's more important because most movies (and DVDs) have aspect ratios wider than 4:3.

    When your 4x3 panel is used to show a 16x9 image, only part of the height of the panel is in use - ie a band across the middle. The top and bottom are occupied by black space. This means that only, say, two thirds of the pixels on the panel are in active use. Therefore definition is lower and/or the chicken-wire is more visible (especially if you zoom it up to compensate for the smaller height).

    On a true 16x9 panel, there is always a 4:3 mode, which adds black bars to the left and right of the 16x9 image.

    This makes both 4x3 and 16x9 images the same "size" (by which I mean, height), without needing zooming. And without any zooming, the size of the chicken wire doesn't increase.

    To put it another way - think about the number of pixels used to make up your picture (where more is better):

    On a 4x3 panel with a million pixels (say):

    a 4x3 image will use the full million
    a 16x9 image will use 750,000.
    a 22x9 image will use 545,000

    On a 16x9 panel with a million pixels:

    a 4x3 image will use 750,000
    a 16x9 image will use 1,000,000
    a 22x9 image will use 727,000

    In other words - better use of pixels overall on widescreen material.
     
  3. Electric Mayhem

    Electric Mayhem
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    Nigel

    Excellent!! Now i understand it.

    Thanks very much:)

    cheers

    Jase
     
  4. Cliff

    Cliff
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    For all the reasons Nigel has mentioned and..

    If you use a 4:3 panel to veiw 16:9 there are other disadvantages as well as resolution.

    The border at the top and bottom will be slightly illuminationed especially with LCD units. If you are using a widescreen then this will illuminate above and below the screen.

    Secondly much of the available light from the lamp house is waisted as it is not used where the top and bottom borders are- it is just blacked out

    During movie shows it is alway preferable to show 4:3 images with a border to the left and right and when the big feature is on it fills the screen ala your local Odeon. This can only be achieved using a 16:9 panel
     

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