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Flat screen Monitors?

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  • Tom Hanlin
    replied
    A CRT monitor has the virtue of variable resolution. An LCD monitor
    is digital and has a single fixed resolution. If your application
    uses exactly that resolution, great. If it uses a resolution that
    scales perfectly to the monitor's resolution, also great. Otherwise,
    the results could be fuzzy, grainy, lumpy, and/or truncated,
    depending on the difference in resolution and how the display card
    and monitor deal with it.

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    Tom Hanlin
    PowerBASIC Staff

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  • Robert E. Carneal
    replied
    Mel, I tried that. I guess I am going to have to name the store
    I went in. One was Office Depot- he said they would NOT allow
    me to put a virus on their computers! Then I caught the manager,
    planning to complain. She said "no problem. The ones at Office
    Depot run text without a problem, and it ran an advertisement
    movie- one of Office Depot's. I managed to talk her into playing
    "The Matrix" and that was really out of focus. She was surprised,
    saying she was told it worked "just like a normal monitor." So
    she tried some Disney DVDs and they to were out of focus. Yes,
    it was a DVD player. Then she tried some educational games that
    had graphics with the same results. Too bad, I was set to buy it,
    and I still would like to get one.

    Then I tried an electronics store, the clerk said I could put
    anything I wanted to on a computer to check out the flat screen
    monitor, +but+ I have to wait for the manager to get back from
    his trip. He "assured" me it would play "anything and everything
    a normal monitor will." (Wow.)

    Thank you.

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  • Mel Bishop
    replied
    Why not take a test program into the store and check it out? This
    is, of course, if the sales reps will let you.


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  • Mike Luther
    replied
    I'm using a SyncMaster 570VT as I type this, in OS/2 and MATROX
    graphics adapter, but that doesn't make much difference. Every
    mode I've tried with the 'standard' PB 3.5 for DOS screen mode works
    in this monitor. And I did a LOT of research into all the brands
    which were available to me before I bought it.

    I can tell you that the most interesting part of this is that the
    deal works just as has been said here. These monitors are optimized
    for the maximum resoltion that is available on each one. Period.

    I can change graphics display modes at will in any OS/2 session, just
    as you folks in WIN do. However, if I back it off of the max that
    it is set for, what happens to text is interesting! If the display
    cannot fill the pixel mix with an exact match in width, for example
    three pixels in exact divide, and it needs three, it will substitute
    only ONE pixel lit up with that vertical bar segment for that particular
    part of a text letter! In other words, you get a decent looking
    display for text for SOME resolutions, and a really decent display for
    the maximum, but those in between will be lousy!

    The upshot of the whole thing is that it, at this point, seems about
    useless to buy a 17 incher for TEXT work! You might as well stay
    with the 15 incher for TEXT work. The reason is that at 1024 X 768
    for the 15 incher, and 1240 X 1024 for the 17 incher, going to the
    higher priced model will simply make your text smaller for clear
    reading! You defeat the whole purpose of going to the larger
    model to get more readible text, by thinking that you can just
    expand a 1024 X 768 display on a 17 incher and get better readibility!

    It just doesn't work.

    This is *NOT* true in CRT monitors, at least in comparison tests that
    we did. Here with discount, the Samsung was the best money buy
    for the clarity with the rebate coupon offered. At 17 inches, it
    just wasn't worth the current price to pay some $650-700 USD for it
    for text work, when $350-400 will do just as well for the SAME SIZE
    PHYSICAL display for what you are reading!

    By Christmas, I think you can look for at least another $50 to $100
    dollars more drop in the 15 inchers, which is the marketing sweet
    spot at the moment. At the same time by then or shortly after that
    the 17 inchers should come down to under $600 USD or so. Also by
    then, you can expect to, perhaps, see, I'm told, better ways of
    arranging the displays for interpolative rendering of the screen in
    text adaptive modes. If that is true, this 'feature' may go away,
    somewhat. However, if it does, it won't be for the current batch
    of what has been already made and will be available for cheaper.

    I wanted the 17 inch one. I gave up and settled for what was just
    adequate, and will let the market re-define that in a few months.

    Meanwhile, for TEXT mode as standard in the PB 3.5 product, just
    stock out of the barrel, I either have to get the MATROX dislplay
    down to about a CPI 5 or so, or up to an 8 or so. There is no such
    thing, at least in the OS/2 graphics as an inbetween.

    The letters are either one pixel in width for the vertical lines, or
    they are two .. but not unless the divisor is exactly equal in
    what you call for so that it can match that.

    FWITW


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    Mike Luther
    [email protected]

    Leave a comment:


  • Robert E. Carneal
    replied
    <Partial copy from John v Poelgeest>
    to try both low and high resolutions. If you are using text
    only screens (so no graphics), go to the command prompt, and
    press CTRL-ENTER to make it full screen. This will show you
    how a native DOS screen is displayed.
    <End>

    John, The information abot the text sounds very reassuring.

    This is getting off on a tangent, no graphics? I am also amateur genealogist, and have hundreds
    of photos. Should I be considering a regular monitor instead?

    Robert


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    [This message has been edited by John v Poelgeest (edited October 09, 2001).]

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  • John v Poelgeest
    replied
    What those sales clerks probably mean is that flat screen (TFT or DSTN) have a native resolution which is fixed at, for example, 1024x768 pixels. This means that there are 1024x768 RGB pixels build in in the screen. It would ofcourse be best if the output from the computer is the same resolution: it gives the most crisp image.However, that is not a must. Every TFT display I've seen so far is capable of displaying other resolutions without a problem.

    If another resolution than the native resolution has to be displayed, there are several possibilities. First, if a resolution from the computer is smaller than the native resulotion, the display will interpolate the missing pixels to make the picture full screen, or there is a black border around the picture., However, if the resolution of the outputted image is larger than the native resolution, pixels will be omitted.

    Example:

    TFT screen with a resolution of 1280x1024

    Output of 640x480 : every vertical pixel will be displayed twice, every horizontal pixel will be displayed 2 of 3 times, or:
    output of 640x480 : there is a border of 320 pixels on the left AND on the right side, and a border of 272 pixels on both the top and the bottom of the screen.

    Output of 2560x2048: every other pixel will be omitted.

    If you want to be sure, go to your local dealer and check if the display complies with the VESA norms. If it does, it should have no problems displaying the screens you create.

    It's very simple to try for yourself: If you are at the store, ask them to connect a Windows98 of 2000 PC to the monitor. Start fiddling around with the resolutions, make sure to try both low and high resolutions. If you are using text only screens (so no graphics), go to the command prompt, and press CTRL-ENTER to make it full screen. This will show you how a native DOS screen is displayed.


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    [This message has been edited by John v Poelgeest (edited October 09, 2001).]

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  • Robert E. Carneal
    replied
    <Copy from Lance>
    Can they be more specific about what modes (text and graphics)
    they do support?
    <End Copy>

    Well, I asked that question and the best answer I can give you
    is their facial expressions went into "haze mode." (Think "in
    one ear, out the other.") Basically they said if it doesn't
    work for me, why was I still interested in it? "Sir, why buy
    something that won't work for you at all?" Then I asked them if
    the monitor didn't work for me THAT horribly, then who in the
    world can use them? No answer. I am beginning to think it must
    have been my bad luck to get clerks who weren't sure of what
    they were saying.

    I might just go to Tiger or PC Connection, but I was trying to
    get it locally.

    Robert


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    [This message has been edited by Robert Carneal (edited September 20, 2001).]

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  • Lance Edmonds
    replied
    They are probably referring to the <U>graphics</U> screen modes (ie, SCREEN 2 (CGA), etc). Over the past few years, many graphics cards have been quietly dropping support for some VESA and MODEX graphics modes, so I would hazard guess that this situation is no different for flat-sceen manufacturers too.

    Can they be more specific about what modes (text and graphics) they do support? I assume text mode (SCREEN 0) would be fully supported. With a list of actual spec's, you may find it easier to make your decision.


    ------------------
    Lance
    PowerBASIC Support
    mailto:[email protected][email protected]</A>

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  • Robert E. Carneal
    started a topic Flat screen Monitors?

    Flat screen Monitors?

    Can anyone be a "Rumor Killer" please? I went shopping for a
    flat screen monitor, and the sales clerks are advising me that
    flat screen monitors cannot support Powerbasic/Quickbasic
    SCREEN modes. It only works in one mode, they say. I am not
    getting one if that is indeed the case! Also the LOCATE
    function will not work, or so they say.

    Can anyone confirm/contradict that please?

    Thank you.

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    [This message has been edited by Robert Carneal (edited September 20, 2001).]
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