screen idea,
I've been reading on here and on the AVS forum about how people are getting good results with siler paint and blackout cloth for a screen. They compare the results with quality skyhawk screens and da-lite screens (hope I got it right).
Anyways, I've seen at retail stores that they sell heavy clear shower curtains, what if that would be painted silver (on the back side) and stretched over a frame. I think this might give good gain and would definately imporve colors and blacks. Im just worried about the expansion properties that the heavy nylon will have. It'll probably crack the paint - or flake off. But they also sell poly silver paint which shouldn't crack or flake off.
Im probably gonna go today and get one of these curtains and experiment.
I originally got this idea from a piece of plexiglass i have but a piece of plexiglass 75" would cost an arm and a leg.
what do you guys think?
ap0
I've been reading on here and on the AVS forum about how people are getting good results with siler paint and blackout cloth for a screen. They compare the results with quality skyhawk screens and da-lite screens (hope I got it right).
Anyways, I've seen at retail stores that they sell heavy clear shower curtains, what if that would be painted silver (on the back side) and stretched over a frame. I think this might give good gain and would definately imporve colors and blacks. Im just worried about the expansion properties that the heavy nylon will have. It'll probably crack the paint - or flake off. But they also sell poly silver paint which shouldn't crack or flake off.
Im probably gonna go today and get one of these curtains and experiment.
I originally got this idea from a piece of plexiglass i have but a piece of plexiglass 75" would cost an arm and a leg.
what do you guys think?
ap0
Another idea I just got is MONOKOTE or ULTRACOTE.
For those of you that don't know what this is, it's the skin for model airplanes. This is a very thin and strong film that is ironed onto the frame of the plane to give its finish.
This film comes in all sorts of gray and silver colors, Plain and reflective, even clear. It comes in 6' - 8' lengths and is about 3 feet wide. It can be joined buy ironing together. I feel that you wouldnt be able to see the joint from the seatting position.
Maybe this could be used.
list of colors:
Metalflake Silver
Fabric Silver
Silver
Dove gray
Flat dove gray
ap0
For those of you that don't know what this is, it's the skin for model airplanes. This is a very thin and strong film that is ironed onto the frame of the plane to give its finish.
This film comes in all sorts of gray and silver colors, Plain and reflective, even clear. It comes in 6' - 8' lengths and is about 3 feet wide. It can be joined buy ironing together. I feel that you wouldnt be able to see the joint from the seatting position.
Maybe this could be used.
list of colors:
Metalflake Silver
Fabric Silver
Silver
Dove gray
Flat dove gray
ap0
One advantage of using Monokote is that you would be able to build a curved frame and stetch the material over it fairly easily. Then you could get a theater-shaped curved screen and have an easy way of getting the fabric taut.
--Clint
--Clint
One thing about using a curved screen is that they work well with CRT Projectors because they have alot of convergence adjudstments. However, I dont think they'll work well with LCDs because a curved screen will distort the image somewhat at the edges and since LCD projectors dont have convergence it'll make it very hard to get a good square image.
ap0
ap0
Convergence is the allignment of the R/G/B pixels to form 1 true color pixel. Curved screens dont affect this (much). Geometry will be affected, but it will only be visible when you are using extremely curved screens.
One more thing:
A curved screen+high gain surface has to be extremely flat; any wrinkles will show up as dark/hot spots immediatly.
One more thing:
A curved screen+high gain surface has to be extremely flat; any wrinkles will show up as dark/hot spots immediatly.
Curved Screens
Curved screens actually don't distort images at all. In fact, they actually un-distort images. Flat screens are actually never completely in focus. That is because the distance from the projection lens to the screen is different for every point on the screen. However, if you use a curved screen with a circular curve (as opposed to parabolic or ellipsoid) with the imagined center of the circle at the point of the projection lens, every point on the screen can be in focus at the same time. That is why the good movie theaters use curved screens. The curve that they use imagines the projector at the center of the circle. Also, curved screens are better for reflecting light back into the viewing audience.
Note that it's not curved much, but the focal differences are very noticable, especially in home theatre systems where there is a very short throw for a very large image size.
Respectfully,
Clint
Curved screens actually don't distort images at all. In fact, they actually un-distort images. Flat screens are actually never completely in focus. That is because the distance from the projection lens to the screen is different for every point on the screen. However, if you use a curved screen with a circular curve (as opposed to parabolic or ellipsoid) with the imagined center of the circle at the point of the projection lens, every point on the screen can be in focus at the same time. That is why the good movie theaters use curved screens. The curve that they use imagines the projector at the center of the circle. Also, curved screens are better for reflecting light back into the viewing audience.
Note that it's not curved much, but the focal differences are very noticable, especially in home theatre systems where there is a very short throw for a very large image size.
Respectfully,
Clint
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