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Old 19th February 2006, 08:58 PM   #1
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Lightbulb LCD PJ with no modification to monitor !!, No removing backlighting!!

I have found an old plan which does not need any modification to your monitor, and no backlight removal. I have yet to find out if it works. If anybody has tried these plans some feedback on them would be great.

Here they are:

http://www.rightstoresale.com/privat...ector-Home.htm

Scroll down to the 2nd set of plans (the hand drawn 1s)

Many Thanks
Luke
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Old 19th February 2006, 09:13 PM   #2
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The problem is, LCDs don't display their image well by just reflection. That's why if your backlight goes out, the image will still be incredibly dark with bright light shining on it, because it has to shine THROUGH it for the image to really display.

Basically, that, combined with the fact that the light wouldn't all go to the lens, and the fact that it's just using 2 regular light bulbs, would probably make a pretty darn dark image. But feel free to try it, as obviously it can't ruin your LCD like opening it up could.

P.S., if you like this idea because you're scared of breaking an LCD while disassembling it, don't be. As long as you ground yourself while you're working on it (I just hooked up a copper wire from my plumbing to my wrist), and don't rip any of the FCC cables, you can't really do much damage.

Just my two cents
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Old 20th February 2006, 07:24 PM   #3
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Quote:
I have yet to find out if it works.
It doesn't.
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Old 21st February 2006, 04:58 PM   #4
eelai is offline eelai  United States
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that plan is for an old stereoscopic postcard projector. the light in the box makes the postcard obviously visible to the naked eye so, therefore the lens is able to "see the image" and project it. the same lights may wash out the lcd image. throw in a glare factor and you'd probably get better results not using extra lights at all. the whole "build a cardboard box around your 13 inch tv and turn it upside down" is based on this very obsolete technique. go to ebay and type in "antique projector" or postcard projector" and you can see, you can buy one of these old bessy's for about ten bucks. it couldn't hurt to try as long as you don't use those bulbs. the heat could damage your screen. at a MAXIMUM lcd's are only supposed to get up to 105-110 degrees F. they're not built to run at that temp constantly. i seriously doubt you'll come up with any satisfactory results, but let us know.
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Old 21st February 2006, 09:34 PM   #5
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Thumbs down Built it today

I built the projector today but found the results were poor (after 3 hours work !)
I wouldn't reccomend this plan,
however i have just got a ps1/x 5" LCD of of ebay and am looking forward to building a PJ using it
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Old 21st February 2006, 09:58 PM   #6
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You're lucky it took only three hours! I've spent upwards of 80 on mine (that said, mine's working nicely).
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