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Projecting through an LCD screen!

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  • Projecting through an LCD screen!

    Projecting through an LCD screen.

    I have been reading through the lumenlab.com forums (for those who don't know, it is a forum based around making your own projectors).

    They mostly create their projects by stripping, say, a 15" LCD monitor, and using fresnal lenses and high power bulbs to shine powerful light through the LCD screen.

    Could we possible shine (a smaller) light through a fresnal, then through an LCD screen to get better brightness (especially throughout the day?).

  • #2
    i'm guessing you didnt find this thread?

    http://www.mp3car.com/vbulletin/showthread.php?t=48909
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    • #3
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      • #4
        Jamez_Warner (cloudy on digital-car.co.uk) is building one of these using a 7" lilliput IIRC.
        Ford Focus MP3 : www.stevieg.org/carpc Blog Updated 29 January 2009!
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        • #5
          Originally posted by cadence117
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          • #6
            Wow, no, I hadn't seen that thread Thanks for the link though.

            That is using LED's. But I was thinking just a regular high quality light bulb through a fresnal lens. Could turn out pretty good.

            (Hate to have people think i'm someone else changing avatar)

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            • #7
              No, actually we are not using LED's we are using CCFL tubes which is the same technology used to currently light the screens. Just the ones we are using are much brighter

              The LED's are only going to be tested if the CCFL tubes dont work out.
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              • #8
                Ahhh, fair enough. I've subscribed to your thread anyway. It will be great to see the results are they unfold.

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                • #9
                  I think all LCD projectors use 3 seperate panels and merge the output using a prizm. You probably can't get enough light through 1 to get it to project a decent image on a wall.

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                  • #10
                    Originally posted by Curiosity
                    I think all LCD projectors use 3 seperate panels and merge the output using a prizm. You probably can't get enough light through 1 to get it to project a decent image on a wall.
                    Ehmm...wrong! Not all. most. You can only imagine how much light you can get from this kind of setups! Try it if you like, you will have a working projector at the end. A high quality one as well!
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                    • #11
                      Yes, that is true. The panels perform very well as a projector
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                      • #13
                        Well, I am in the market for a new projector, but it has to be at least 1280x720. They need to make really small panels that can do that or even 1920x1080 for cheap. Oh, and I want it right now.

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                        • #14
                          Not to mention I think dlp is a single panel projection system thats similar although I don't know much about those.

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                          • #15
                            I don't like the look of DLP. The pixels are X shaped, it's not full 16M colors, and they are in the shop a lot. It's little mirrors that are just on or off and a color wheel spins for each component of the RGB. D-ILA/LCOS looks a little better than LCD but they don't make projectors that use it yet.

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