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Question about projectors displaying black levels

Discussion in 'Projectors, Screens & Video Processors' started by booker, May 14, 2005.

  1. booker

    booker
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    Finally i saw 2 projector running... for 30 min..
    I saw 1 DLP and 1 LCD to compare the "weakness" and "strengh".

    Bascially the guy didn`t know **** about it..but i let the pictures talk for themself...

    I was really pleased to not see Rainbows on DLP at all, at least for 30 min, wich was what i stayed there... nor VB on the LCD.... i saw the SDE, but that is really not a concern, it is really a matter of being a little back and to be honest i didn`t find them anoying like most people have.

    BUT 1 thing does really concern me on both projectors i saw... DLP and LCD, the black levels... i`m going t post a screens to show you how i did look them and how they should look, i already know the DLP has better Black levels than the LCD, but to be honest i didn`t like them on either of the two.

    I`m almost certain that the Projectors wasn`t calibrated at all since both were on 50 on all categories but still, we tried to lower the brightess all the way down on the DLP and it still shows Gray instead of "light black" (i know it won`t be black).

    When we turned Brightess all the way down on the DLP the Picture does loose Brightenss but the Screen still looked Gray... then i told the guy that it still look gray to me..and he said it was true, but that is coz the DVD player was on Bright Signal or something, i do know i have a SOny dvd player who has this setting, Black Level, bright or Dark...but i also know if i set on Bright, when i turn down the brightness i can make the black darker, this wasn`t the case on the projector today.

    This really turned me down since movies looks like "gray" instead o black this really affect the deepness of the picture and overall quality.

    I`m starting to presume this is a fact on all projectors, no matter wich tech they use they will be gray.

    I`m going to post a few screens to show on screenshots what i`m talking about since explaining could be missleading.

    Also when the guy took off the dvd, the screen with the DVD backgrond still produce the gray instead of "black" so the dvd weren`t the problem.

    Again i`m not expecting real black.... but also i don`t want them to be gray

    This is how projectors are or i was looking a bad calibrated, setup projector?

    the 2 projectors i saw was X2 (DLP) and Infoucs 5000 (LCD)

    DVD backfround
    http://server3.uploadit.org/files/booker-No_dvd_Playing.jpg

    How the movie should look:
    http://server2.uploadit.org/files/booker-example_good.jpg

    How does look on projectors:
    http://server3.uploadit.org/files/booker-example_bad.jpg

    Note:this are photoshop tweaked screenshot to give u an idea of what im talking about.
     
  2. EnglishJohn

    EnglishJohn
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    your links dont seem to work.
     
  3. PJTX100

    PJTX100
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    I think they must have been badly set up, or being viewed in less than ideal conditions.

    Modern PJ's give give more than enough contrast for it not to detract form the viewing experience, as long as the room is dark...PJ :)
     
  4. booker

    booker
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    sorry, the link are fixed, just compare the good with the bad and you will get what i`m saying...in fact i believe it was more gray than i did it on the demo pics i posted above.
     
  5. Oakleyspatz

    Oakleyspatz
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    Was the room you viewed the projectors in completely dark or was there lighting on? Projectors really need to be used in complete darkness to be at their best just as when you go to the cinema they dim the lights before showing the movie. Same principle.
    I can only imagine if the salesman didn't know s*** about projectors, he probably had loads of lights on in the room.
     
  6. Gary Lightfoot

    Gary Lightfoot
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    Having a very bright projector on a small screen will give you bright blacks, and as Oakley said, you really need good light control - the screen will only ever be as black as the room will allow. If the projector isn't running, and there is light on the screen, that is the lowest black level it can possibly achieve - white.

    If you want better blacks, then you will need a lower lumen pj, a larger screen, a grey screen or add a filter to reduce the lumen output across the range. If you prefer 'true' blacks, then CRT is your only choice.

    Detail in black areas may need to be there, so a test disk is the best way to set up the display for white and black levels. Even CRTs have to have a slightly raised black level in order to make shadow detail visisble.

    Most run-of-the-mill shops will not be able to set up a projector correctly so quite often you've little chance of seeing them perform at their best.

    Gary.
     
  7. booker

    booker
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    Guys thanks a lot, i`m starting to feel there was a mistake on from the sales man.

    THe room was dark, but not totally dark it has 2 dim lights near both screens, i was almost to ask him to turn them off but i didn`t ( I`m an idiot i know).
    The more i read i felt it was the lights being on near the screens more than anything...

    Damn why i didn`t ask to turn them off! :(
     
  8. Gary Lightfoot

    Gary Lightfoot
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    Not your fault - generaly we expect the salespeople to know something about the products they sell, but quite often they're just sales people if you know what I mean.

    Gary.
     

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