Need help with curved screen - AVS Forum
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post #1 of 11 Old 07-10-2013, 05:28 AM - Thread Starter
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Hi, I currently have a 106" 2:40.1 flat screen, I am wanting to build the same screen but curved. I am working on making a anamorphic lens using prisms. I need help with what the curve of the frame should be with this size of screen. I have a Panasonic ae7000u PJ that is ceiling mounted and 13feet back from the screen.

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post #2 of 11 Old 07-10-2013, 05:59 AM
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Get yourself a piece of 5' x 10' x 6mm Sintra. Have the source cut it to size, + 2" extra all around.

It is both rigid but flexible enough that when bent, it can provide a evenly distributed Curve, and that radius can be supported by as few as two Blocks at each end.

This can allow you to fine tune your needed radius to both your Screen's size, and the PJ's / A-lens optics.

To quote James T. Kirk;
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post #3 of 11 Old 07-20-2013, 07:37 PM
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Thanks for pointing me to the right direction. I've used a 4'x10' parkland plastic before when I made my previous diy curved screen, it was too flexible that it would require the entire supporting frame to he curved as well, or I'd end up with bubbles or dips on the projected surface. I looked at the sintra, but it said it's satin finish, is that going to cause hotspots?
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post #4 of 11 Old 07-20-2013, 09:12 PM
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No....and it actually might be beneficial with a curved screen. Of course few use it without painting a superior surface on it anyway.

But you can knock down the very slight Satin Sheen simply by rubbing the entire surface with CLEAN Thick Cotton cloth (Towels work well). Press very firmly, but be sure the entire surface gets rubbed well. You can't hurt it by over rubbing....but if you miss a spot, that area will "shine" with more sheen than other areas will.

You will find the Sintra is over 2x as rigid as Parkland was, being 6mm thick while the Parkland was only 2.5 mm

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post #5 of 11 Old 07-20-2013, 09:37 PM
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Thanks, so you think just something as small as 2 blocks on each of the horizontal end can support the curvature of the screen? What kind of adhesive works best on keeping it to the blocks? I don't intend on painting it.
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post #6 of 11 Old 07-21-2013, 05:22 AM
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2 - 2x4's on each end, standing on edge, each toed-in to the wall with screws can get the job done... by computing the degree of the curvature you want, and easily ripping them lengthwise to create a angled base. Extreme curvature can be had using 2x6's

Water based "Power Grab". Use either Clear or White.

Are you trimming this screen?

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post #7 of 11 Old 07-21-2013, 10:46 AM
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Thanks, will probably just have the source cut it to the exact size I need (51"x10') as I don't have a power saw. Not even going to add a frame to it, so this should be a easy diy job.
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post #8 of 11 Old 07-22-2013, 07:41 AM
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MississippiMan, do you know any places that stock and can trim the sintra boards you recommended in 5x10?
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post #9 of 11 Old 07-22-2013, 08:29 AM
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There should be several available to you, but I need a specific location (City) to zero in on one.

Southern "LaLa" Land is a big place. biggrin.gif

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post #10 of 11 Old 07-23-2013, 11:32 AM
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Yes I found a place, but the guy told me komatex is the same thing as sintra. Should I go ahead with komatex? Will it work like sintra u recommended and can still use water-based power grab for it?
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post #11 of 11 Old 07-23-2013, 12:02 PM
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Yes...yes...and yes.

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