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LCD + Flashlight = projector?

Discussion in 'Projectors, Screens & Video Processors' started by hahnyc87, May 14, 2005.

  1. hahnyc87

    hahnyc87
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    I am working on a project with my friends. We are trying to make a projector. If I understand correctly, doesnt placing a flashlight behind an LCD project that image onto a wall? That is just the base and then the lens focus and magnify?

    I have been playing with LCDs from cell phones but they hookup by some odd method and I cant seem to wire them so the LCD can be turned on a few feet away. When they hook up they have to be pressed right against the board and i cant get a flashlight behind it.

    Thanks
     
  2. frosty03

    frosty03
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    it's the same story of bedsheet + some string = parachute... have fun
     
  3. drummerjohn

    drummerjohn
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    Go here - www.diyaudio.com

    they have huges threads, pics and designs on this topic.
     
  4. PJTX100

    PJTX100
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    You could think laterally and try to retro fit the Tosh ET1 into being a mobile phone... may save some money too... though finding brightly coloured snap-ons may be more difficult...PJ :)
     
  5. hahnyc87

    hahnyc87
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    lol im really confused, 3 posts and no one has answered my question even remotely
     
  6. theritz

    theritz
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    Drummerjohn helpfully point you to a forum which has a following for building diy projectors, which is more helpful than trying to answer your questions.

    Your questions:


    Technically, yes....... it will look completely pants (assuming you can see anything at all, that is).


    I have no idea what that means.

    If you're interested in having a projector, then it will be easier and cheaper to watch the classified ads forum here - entry level projectors crop up from time to time in the £200 - £300 range. By the time you you find an appropriate light source (a flashlight would be about as much use as an unlit candle), get an appropriate reflector, polarisers, decent LCD panel, cooling fans, lenses and built them all into a (very large) box, I reckon you will have spent more money, and wasted time more usefully spent watching movies/gaming/whatever.


    S.
     
  7. hahnyc87

    hahnyc87
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    OK thanks, but the point was I wanted to build a really small one, I'm just trying to understand the concept of how they work with LCDs and stuff
     
  8. Gary Lightfoot

    Gary Lightfoot
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    LCDs won't have enough lumens to make an image big enough. The technology is getting there, but it's a way off right now.

    There is a small LCD pj out now IIRC, but as far as I know the quality is as The Ritz put it 'pants'.

    If you have the parts to have a go, why not? Getting it focused is another project so you'll be needing some lenses of some sort - maybe some cheap camera lenses will work? Try the links provided as the guys there have been doing this for ages so it might save you some time and a lot of trial and error.

    Gary.
     
  9. hahnyc87

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    what do you mean LCDs wont have enough lumens? in a projector now there is an LCD, and a lamp behind it i thought
     
  10. Gary Lightfoot

    Gary Lightfoot
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    Sorry, I meant LEDs. :blush:
     
  11. Nick_UK

    Nick_UK
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    The big problem is getting enough light through the LCD without the heat frying it.
     
  12. AMc

    AMc
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  13. dorgan

    dorgan
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  14. JuJu

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    This article got me into projectors at Christmas:
    http://www.tomshardware.com/howto/20041113/index.html
    It mounts an LCD panel on an overhead projector.

    In the end I didn't bother with this, and instead decided to buy a proper one. Then I doubled my budget and got my 4805 :D
     

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