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Help me build a 120" High Gain DIY Screen for Sony VPL-AW15: Budget $700

post #1 of 6
12/4/07 at 1:45am
Thread Starter 
I don't have the thousands for a Stewart fixed frame screen and don't want a roll up screen... so after looking at some amazing DIY screens I think I want to go that route.

The Sony VPL-AW15 has 1300 lumens and 12000:1 Contrast ratio.
Currently I have 12'x19' room that has no light pouring in... completely light controlled with dimmer switches (Bat cave). Below is the wallpaper for the room

I would like to build a 120" 1.8+ gain screen with all the trimmings. A beautiful framing border with rope light in the back (What color should I get considering the wallpaper... blue wouldn't be good right?)

I don't know what materials to get or anything... I am very undecided. I am very interested in any exotic suggestions anyone has...
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post #2 of 6
12/6/07 at 11:15am
Try the silver paint from Goo Systems on MDF maybe?
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post #3 of 6
12/6/07 at 11:43am
In the following photo there are three samples of Behr UPW white paint. The leftmost is on its own. The next has a polyurethane top coat and a measured gain of approximately 1.3. The larger right area has a Pearlizing Clear Coat on it and the gain has not been measured.

The Pearlizing Clear Coated sample is obviously much brighter than the poly top coated sample so I would therefore assume it is higher than 1.3 gain but I have not had it measured.


Click image to enlarge.

The wall paper is fairly light colored. Does it have any sheen? Is the ceiling white?

NOTE: Any reference to the Pearlizing Clear Coat usually results in people pointing out that it causes color shifting etc. I have done some comparative measurements and two coats using a 1/4" nap fuzzy white synthetic roller will cause a shift of around 3 to 4 RGB points. The red shift is usually around one point less than the green and blue. Therefore if you started with a perfectly neutral base paint the result would be a near neutral within 1 or 2 RGB points.

Example: start with RGB = 245 245 245 and the Pearlizing Clear Coat may change this to 242 241 241. So be warned!

Final thought, consider the Wilsonart "Designer White" laminate for a screen. Just follow some of Clarence's posts in the Laminates thread to see why. Keep in mind that Clarence has a light controlled room and a very good CRT projector.
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post #4 of 6
12/7/07 at 10:30am
I'm also interested in a 120" high gain screen for aw15.
Screen experts.... Please help....
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post #5 of 6
12/7/07 at 2:32pm
Quote:
Originally Posted by tiddler View Post

In the following photo there are three samples of Behr UPW white paint. The leftmost is on its own. The next has a polyurethane top coat and a measured gain of approximately 1.3. The larger right area has a Pearlizing Clear Coat on it and the gain has not been measured.

The Pearlizing Clear Coated sample is obviously much brighter than the poly top coated sample so I would therefore assume it is higher than 1.3 gain but I have not had it measured.


Click image to enlarge.

The wall paper is fairly light colored. Does it have any sheen? Is the ceiling white?

NOTE: Any reference to the Pearlizing Clear Coat usually results in people pointing out that it causes color shifting etc. I have done some comparative measurements and two coats using a 1/4" nap fuzzy white synthetic roller will cause a shift of around 3 to 4 RGB points. The red shift is usually around one point less than the green and blue. Therefore if you started with a perfectly neutral base paint the result would be a near neutral within 1 or 2 RGB points.

Example: start with RGB = 245 245 245 and the Pearlizing Clear Coat may change this to 242 241 241. So be warned!

Final thought, consider the Wilsonart "Designer White" laminate for a screen. Just follow some of Clarence's posts in the Laminates thread to see why. Keep in mind that Clarence has a light controlled room and a very good CRT projector.

The most difficult thing to avoid when trying to make a higher gain screen is hot spotting. As the gain increases the viewing cone decreases. At some point the viewing cone is so narrow that the variation can been seen across the screen. The brightest area in the center of the screen is referred to as a hot spot.

I have recently been making up samples of various Folkart Pearl products mixed in Behr Matte Polyurethane. The Folkart Pearlizing Medium is the most effective at boosting gain but it may do so at the expense of hot spotting. It certainly appears to have more of sheen based gain than the samples using Folkart Metallic White Pearl. Unfortunately I am not in a position to make up full screen size samples so I can't tell if the Pearlizing Clear Coat will hot spot with brighter projectors. I would be inclined to either try the single bottleof Folkart Metallic White Pearl to a quart of Behr poly or simply go with a good matte paint.

Just be warned if you try these metallic flake based solutions that they may work well for some folks and not so well for others.
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post #6 of 6
12/8/07 at 3:20am
Thread Starter 
Quote:
Originally Posted by tiddler View Post

In the following photo there are three samples of Behr UPW white paint. The leftmost is on its own. The next has a polyurethane top coat and a measured gain of approximately 1.3. The larger right area has a Pearlizing Clear Coat on it and the gain has not been measured.

The Pearlizing Clear Coated sample is obviously much brighter than the poly top coated sample so I would therefore assume it is higher than 1.3 gain but I have not had it measured.


Click image to enlarge.

The wall paper is fairly light colored. Does it have any sheen? Is the ceiling white?

NOTE: Any reference to the Pearlizing Clear Coat usually results in people pointing out that it causes color shifting etc. I have done some comparative measurements and two coats using a 1/4" nap fuzzy white synthetic roller will cause a shift of around 3 to 4 RGB points. The red shift is usually around one point less than the green and blue. Therefore if you started with a perfectly neutral base paint the result would be a near neutral within 1 or 2 RGB points.

Example: start with RGB = 245 245 245 and the Pearlizing Clear Coat may change this to 242 241 241. So be warned!

Final thought, consider the Wilsonart "Designer White" laminate for a screen. Just follow some of Clarence's posts in the Laminates thread to see why. Keep in mind that Clarence has a light controlled room and a very good CRT projector.

The wallpaper does have a heavy sheen to it... it was a PITA to get it color matched at MAB paints for the stair well. Also the ceiling is currently white, but I want to put in a star ceiling so it will most likely be painted a dark color soon. I will post up a diagram in the next day or so showing the layout out of the room and what I have to work with.
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