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Making a hole in a flat panel display (literally)

Discussion in 'Electronic Basics' started by DIAMOND Mark R., Jan 19, 2004.

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  1. I posted this initially to one of the other newsgroups, and someone kindly
    suggested that this was probably a better forum...

    This will sound very strange, I know, but I need to be able to display
    images in a situation where the display surrounds a tube about 8mm in
    diameter. Constructions with back-projection and so forth are probably
    possible, but I wondered about using a flat panel display. Unfortunately, I
    don't know enough about the construction of flat panel displays to answer my
    own question which is ...

    Can one bore a hole (laser cutter, diamond drill or anything else) through a
    flat panel display and still have the intact part of the display working ...
    or will the hole destroy the electrical connections to other parts of the
    screen?

    Cheers,
     
  2. Fred Bloggs

    Fred Bloggs Guest


    This was a totally UNBELIEVABLE question until I saw the dot.au-LOL.
     
  3. Thad Smith

    Thad Smith Guest

    With a standard display, this won't work. While it should be possible
    to design a display with a hole in the middle, I suspect the cost would
    be prohibitive for low-volume use.

    I would think about using a projected display, as you mentioned,
    probably with two sources, one on each side of the tube, possibly with a
    vane to confine each source to the proper display area.

    Thad
     
  4. Basic answer. No.
    It depends on the sort of display you have in mind. Normal LCD's (as opposed
    to TFT etc.), can be bought in custom shapes quite cheaply, even for fairly
    small runs. With these, the shaped areas for the display, can be printed to
    go round holes etc.. These allow good contrast ranges (depending on the
    technology chosen), but normally fairly slow update rates, and a limited
    number of actual 'segments'. The graphic displays used on laptops etc., all
    use some form of 'matrix' scanning, to keep the number of connections down.
    Hence a hole in these, will destroy the matrix connections in all the
    columns and rows crossed.

    Best Wishes
     
  5. Jerry G.

    Jerry G. Guest

    Unbelievable question!!! YOU WILL DESTROY IT!

    --

    Greetings,

    Jerry Greenberg GLG Technologies GLG
    =========================================
    WebPage http://www.zoom-one.com
    Electronics http://www.zoom-one.com/electron.htm
    =========================================


    I posted this initially to one of the other newsgroups, and someone kindly
    suggested that this was probably a better forum...

    This will sound very strange, I know, but I need to be able to display
    images in a situation where the display surrounds a tube about 8mm in
    diameter. Constructions with back-projection and so forth are probably
    possible, but I wondered about using a flat panel display. Unfortunately, I
    don't know enough about the construction of flat panel displays to answer my
    own question which is ...

    Can one bore a hole (laser cutter, diamond drill or anything else) through a
    flat panel display and still have the intact part of the display working ...
    or will the hole destroy the electrical connections to other parts of the
    screen?

    Cheers,
     
  6. Don Bruder

    Don Bruder Guest

    That would depend entirely on how the particular panel being used was
    wired. As a general-purpose answer, I would say "no, can't be done".

    Good luck trying to get the people who make the things to tell you what
    the "guts" of the panel looks like. Most outfits who do this sort of
    manufacturing are *VERY* secretive about stuff like that, so the best
    answer you're likely to get is "That's proprietary information."

    It *MAY* be possible to get a panel custom-built with a hole in the
    middle, but you can bet it'll cost you dearly.

    Out of curiousity, why do you want a rod sticking out of the display???
    That's the part I can't figure out...
     
  7. Willy Wanka

    Willy Wanka Guest

    NO

    Put a glass/plastic window in front with hole/rod mounted to it
     
  8. Zak

    Zak Guest

    Besides there is a problem with the liquid between the glass plates - it
    will flow out, go bad, or whatever.

    And the cutting will likely change the distance between the plates. That
    distance is very small, but the display is quite sensitive to it (try
    pushing one gently).


    Thomas
     
  9. Garrett Mace

    Garrett Mace Guest

    Can one bore a hole (laser cutter, diamond drill or anything else) through
    a

    Well, I HAVE seen laptops that had part of the display experience some
    trauma, so that a chunk of it didn't work. The rest of the screen looked
    fine. So, I guess you could try it.

    However, look at this from a cost-analysis point of view. Assuming the
    display you're talking about isn't large, you can get cheap LCD projectors
    these days for about twice the price of an LCD screen. You could go ahead
    and use the projector and frosted glass, you know it'll work. Or, you could
    try an LCD first: either you win and the project costs 50% of the projector
    solution, or you lose and the project costs 150% of the projector solution
    because you'll have to buy the projector anyway. Odds are high that you will
    lose, so you should take the sure thing and save your money.

    Would a projection TV fit your application? The screen is nothing more than
    a piece of plastic which could easily be drilled through. Though I wouldn't
    guess as to the shadows cast internally.
     
  10. yes

    and still have the intact part of the display working ...

    no
    You'll also destroy some of the mechanics, physics, chemics and (maybe)
    more.

    petrus
     
  11. Rich Webb

    Rich Webb Guest

    [snip...snip...]
    As a gauge cluster around a steering wheel for a driving simulator?
    Mount it all in a Formula One style cowling, add pedals and BIG speakers
    (or at least a good woofer).

    The graphics would be pretty easy to handle as a single XVGA display
    panel. Using something like 1/4 VGA embedded-style displays positioned
    around the shaft would work but would require a bit more work for the
    display controllers.

    (Follow-ups set to s.e.b)
     
  12. Don Bruder

    Don Bruder Guest

    <snip>

    I can't see a steering wheel (in a simulator or otherwise) being mounted
    on an 8mm rod.
    (Follow-up un-set. Not everybody reads the same selection of newsgroups
    you do, Rich. Some of us operate on servers that have never even heard
    of some of the newsgroups you take for granted, and don't appreciate it
    even a little when a cross-posted thread we're following "vanishes" into
    some other newsgroup we can't see, let alone read, due to somebody else
    trying to play net-cop and redirecting it elsewhere.)
     
  13. Mac

    Mac Guest

    You coldn't just attach the tube with an adhesive?

    Mac
     
  14. Ian Stirling

    Ian Stirling Guest

    Why?
    There may be other options.
     
  15. I've seen watches with mechanical hands, with the seconds displayed
    on the background, in large digits. Hole in the lcd. Not the same
    as drilling a hole in a graphical matrix lcd, of course.

    Here are a few:

    http://www.watchzone.com/cgi-bin/watchzone.storefront/400c43a5000fa0e627430a8012520640/Catalog/1911
     
  16. The first thing that came to my mind, given an 8mm tube, is some
    kind of elaborate squirting flower style practical joke. I guess
    that shows something about the state of my mind.
     
  17. The first thing that came to my mind, given an 8mm tube, is some
    kind of elaborate squirting flower style practical joke. I guess
    that shows something about the state of my mind.[/QUOTE]

    I thought of a video game that would automatically shoot the loser in
    the head with a 0.22 hollow point slug.

    Best regards,
    Spehro Pefhany
     
  18.  
  19. Garrett Mace

    Garrett Mace Guest


    I thought of some kind of meter with a programmable face. Mount it in your
    car, and you can tell the officer "But sir, I wasn't going a hair over
    eggplant! Maybe as high as dodecahedron to pass a truck, but never as high
    as pelican!" And the fuel gauge goes from Britney Spears to Stephen Hawking.
     
  20. Alex Bird

    Alex Bird Guest

    I don't know how much this is legal boiler-plate, but service manuals
    for laptops and the like are very clear about not getting the liquid
    crystal on you if damage makes it leak out.
    Another good reason not to drill holes in it!

    Does anyone know what class of nastyness the LC belongs to?

    Alex
     
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