1. Guest,
    If you need help getting to know Xenforo, please see our guide here. If you have feedback or questions, please post those here.
    Dismiss Notice

Building your own LCD video projector

Discussion in 'Home Theater Projects' started by ScottFurr, Dec 28, 2003.

  1. ScottFurr

    ScottFurr Member

    Joined:
    Dec 27, 2003
    Messages:
    6
    Likes Received:
    0
    Hey everybody...I've been designing and building video projectors for about a year now. I thought some of you DIY types might be interested in building your own projectors. Basically you can build a very high quality LCD projector for a couple hundred bucks. The great thing about these projectors is that the metal halide bulb last for 20,000(!) hours and costs about $15; a far cry from the $250-$600 commercial projector bulbs cost, plus the commercial projector bulbs blow easy and last about 2000 hours if you nurse them. The LCD actually comes from a LCD computer monitor...the deals on these are fantastic now...you can get very fast, high contrast XGA panels for about $175 new and I've seen them go for $75 used.

    Anyway, I've spent several months putting the info together and created a guide that I sell on our site: lumenlab dot com for $19.99. For those of you who don't have a big knowledge of optics, lamp types (color temps, wattages, form factors), lcd technologies etc, this guide makes it super easy for you...basically if you can build a speaker cabinet you can build an XGA projector.

    I also run a private forum for anyone who gets the guide so that we can give attention to your project and see you succeed. Check it out and let me know what ya'll think...peace

    p.s. i was going to post some pics of my results however for some reason i can't link to images off site and there's no image upload for this forum. So just message me and I'll point you to some pics.
     
  2. Dan Wesnor

    Dan Wesnor Well-Known Member

    Joined:
    Apr 28, 1999
    Messages:
    389
    Likes Received:
    0
    Geez, for that kind of money I can get a Fresnel lens that converts my regular TV into a 100" big screen!
     
  3. Mark gas

    Mark gas Well-Known Member

    Joined:
    Mar 23, 2002
    Messages:
    322
    Likes Received:
    0
    why not just go to DIYAUDIO.com and get the info for free?
     
  4. ScottFurr

    ScottFurr Member

    Joined:
    Dec 27, 2003
    Messages:
    6
    Likes Received:
    0
    Mark, we have a thread going at DIYAUDIO where there is a lively discussion about this very topic. Here's what one of the DIYAUDIO users has to say...



    Here's a pointer to the thread if you'd like to check it out for yourself
    diyAudio Forums > Top > Video > Video > Lumenlab.com
     
  5. Hank Frankenberg

    Hank Frankenberg Well-Known Member

    Joined:
    Oct 13, 1998
    Messages:
    2,573
    Likes Received:
    0
    Huh? A quality LCD video projector with a 20,000 hour metal halide lamp?
    Have I missed a revolution? I guess I can cancel my trip to C.E.S. next week.
     
  6. Dan Wesnor

    Dan Wesnor Well-Known Member

    Joined:
    Apr 28, 1999
    Messages:
    389
    Likes Received:
    0
    OK, what we're talking about is taking an LCD panel and taping it to an overhead projector. That's high quality? That's ridiculous.
     
  7. ScottFurr

    ScottFurr Member

    Joined:
    Dec 27, 2003
    Messages:
    6
    Likes Received:
    0


    Dan, actully that's not at all what we're talking about. While overhead projectors coupled with an LCD do have limited success -i.e. better than the fresnel scam you mentioned in you first post- the design we chose for our first projector has the metal hallide light source, it's ballast, cooling fan, fresnel lenses, 15" LCD panel, and objective lens incorporated into a clean, simple, and easy to construct form. A wooden box. We used an XGA LCD panel with 500:1 contrast and 15ms response. The resolution of the lumenlab projector is higher than the X1 or Powerlight S1, and the contrast ratio is higher than the Powerlight S1 as well. This projector is bigger than those but you can build a SVGA projector based on a 7" panel that would be about the size of half a briefcase, cost half as much as the X1 or S1 and would have a bulb life of 10,000+ hours and a bulb cost of ~$30. Oh, and we didn't use any tape.
     
  8. Hank Frankenberg

    Hank Frankenberg Well-Known Member

    Joined:
    Oct 13, 1998
    Messages:
    2,573
    Likes Received:
    0

    And why not?? 3M Duct Tape will help hold anything together.[​IMG] And, we could use the sales.
    Okay Scott, post some close-up, high-res screen shots.
     
  9. Mark gas

    Mark gas Well-Known Member

    Joined:
    Mar 23, 2002
    Messages:
    322
    Likes Received:
    0
    I went over to diyaudio.com and saw the thread. It looks intresting. Might have to drop20 bux for the instructions.
     
  10. Chu Gai

    Chu Gai Well-Known Member

    Joined:
    Jun 29, 2001
    Messages:
    7,270
    Likes Received:
    1
    Gonna give a cut to HTF for the free advertising?
     
  11. Jake K

    Jake K Well-Known Member

    Joined:
    May 22, 2003
    Messages:
    132
    Likes Received:
    0

    Why do manufacturers use three lcd panels instead of just one? There must be some disadvantage to using just one.
     
  12. Hank Frankenberg

    Hank Frankenberg Well-Known Member

    Joined:
    Oct 13, 1998
    Messages:
    2,573
    Likes Received:
    0
    The three panels is analagous to three CRT's: one for each of the primary colors, RGB. The primaries can be adjusted individually.
     
  13. Jake K

    Jake K Well-Known Member

    Joined:
    May 22, 2003
    Messages:
    132
    Likes Received:
    0
    I know they each only display one primary color. So with only one LCD panel you would have limited calibration controls, so you're stuck with the picture as it is? I don't have any LCD displays, so I don't know.
     
  14. MattBu

    MattBu Well-Known Member

    Joined:
    Dec 8, 2003
    Messages:
    186
    Likes Received:
    0
    I want to see high-res close up pics. Come on!
     
  15. Ches Campbell

    Ches Campbell Well-Known Member

    Joined:
    Nov 9, 2001
    Messages:
    194
    Likes Received:
    0
    I have been doing a lot searching on this type of stuff on diyaudio. I have a couple questions.
    1) Does it make any noise (i.e. fan noise)?
    2) Does it get very hot?
    3) Do you have to use a computer? In other words, is the XGA cable the only type of connection, and if so, is there a way to convert it to say s-video or compnent video?
    4) Does it end up resembling an overhead projecter?
    5) Are there any internet companies that sell the parts needed for the construction (i.e. fresnel lenses, metal hallide bulbs, ballasts, projector lenses...)?

    I probably have some more questions, but this will do for now.

    I am so interested in doing this for my apartment. I am in college, so i have a tight budget.

    Later
     
  16. Joseph Sabato

    Joseph Sabato Well-Known Member

    Joined:
    Sep 13, 2003
    Messages:
    67
    Likes Received:
    0
    My guess is that you have to use a computer to drive it; if you have a DVD drive on your PC, you are set, any other source will have to be scaled to the panel's native resolution. You will need a TV card or something like an ATI " All in Wonder" card that has a tuner built in, and can accept analog video inputs and scale them to XGA.
     
  17. Ches Campbell

    Ches Campbell Well-Known Member

    Joined:
    Nov 9, 2001
    Messages:
    194
    Likes Received:
    0
    one more question...
    How far are you from getting the plans for the 7inch finished up? Just seeing if I should wait. Also, is it going to be anything like the one in this thread http://www.diyaudio.com/forums/showt...5&pagenumber=1
    If so, then I am definately interested. That looks just like a commercial projector. I am sure yours is just as good, but this one has a great size.
    Later
     
  18. ScottFurr

    ScottFurr Member

    Joined:
    Dec 27, 2003
    Messages:
    6
    Likes Received:
    0
    Ches,
    to answer your questions:

    1) Does it make any noise (i.e. fan noise)?
    All projectors, like home computers make noise from the power supply fan. This is an unavoidible fact of life. Ours is no exception however, like other projectors the sound isn't noticible when you are watching movies.

    2) Does it get very hot?
    We spent some extra time working up a design that keeps the LCD well within it operating temperature. It's been holding steady at about 96f.

    3) Do you have to use a computer? In other words, is the XGA cable the only type of connection, and if so, is there a way to convert it to say s-video or compnent video?
    The LCD panel we used is a computer monitor so it uses a VGA connector. Some newer DVD players actually coome with a VGA connector. The other option would be a line doubler or tripler that scales your dvd/vcr output up to XGA and has multiple connectors(VGA, S-Video, Composite).
    The panel we will be using for the 7" projector has both VGA and composite(rca) inputs.

    4) Does it end up resembling an overhead projecter?
    No.

    5) Are there any internet companies that sell the parts needed for the construction (i.e. fresnel lenses, metal hallide bulbs, ballasts, projector lenses...)?
    Yes. Currently several sites are selling the components you would need to build a projector. Total cost is around $400 USD. We have a list of several dealers and we also hope to be selling parts ourselves in the near future.

    As for your question about the 7" projector. Yes the 7" will be more in line with the form factor of other small LCD projectors.
     
  19. ScottFurr

    ScottFurr Member

    Joined:
    Dec 27, 2003
    Messages:
    6
    Likes Received:
    0
    For you folks wanting to see some images results of our projector. please feel free to click the link in my sig... I have a few more posts to make to the forum before I can post images
     
  20. Brett DiMichele

    Brett DiMichele Well-Known Member

    Joined:
    Sep 30, 2001
    Messages:
    3,184
    Likes Received:
    0
    You have to contribute money too before you can do advertising..



    And I looked at the pictures... Those are not high res at
    all. I have lurked in the DIY Projector forums for quite a
    bit and read the threads and the results.. This is a great
    project for a poor College kid and that's about it! (IMHO).

    If you are looking for better image quality you will be
    willing to spend the money and live with the tradeoffs of
    a good commercial LCD, DLP, LCoS FP setup.

    Again that's just IMHO.
     

Share This Page