OK my first effort is finished and can be found here (pg 48. post #1438 and 1439)http://www.avsforum.com/avs-vb/showt...0#post21802850
Originally Posted by cuzed2
I am about to try and build an economical, low-profile, low power lighted display
for use with movie posters or customized marquee artwork. I know at least one other AVS person is interested in the low-profile approach - so I thought I would post here, and see if others are interested in following along or contributing. For me low profile means less than 2.5" deep (preferably less than <2"). Why low profile?
1) This will be going in the 90 degree landing area of the stairway used to enter my theater area, and I want to preserve some "maneuvering" space in the landing.
2) I intend to use 12 volts to power this from my equipment room under the landing, and would rather not have to run 115volt into the landing area. So going with 12 volt LED "tapes" allows for a low profile.
I was hoping to go even less than 2", but it seems that one needs a minimum of 1.5" of space between the LED "plane" and the poster "plane" to get "defocussing" of the LED source for even illumination onto the poster.
As for cost: the most expensive components appear to be the sheets of acrylic in the desired ~27" x ~40" dimension (24" widths are common for lighting panels, but the costs appear to increase when you go to larger non-standard sizes). And one will need two sheets; one clear sheet for the front, and a 2nd sheet to act as a diffusor between the LEDs and the poster "plane".
I'll soon start sharing some photos of the different materials I am pursuing and experimenting with...
You may recall my original goals were: "economical, low-profile, low power lighted display".
So how did I do with the goals1) Economical >> I was hoping for $200.00. I ended up at about $270.00
The cost of getting a thick white acrylic diffusor panel was a bit of a surprise. There are numerous choices of diffusor material in dimensions of 24" x 48", However; for standard posters you need to be 27" wide, which seems to require a custom (expensive) order. I also could have saved another $30.00, If I would have gone without the oak trimmed frame. As an alternative; one could just go with a wide spotlight frame and skip the oak trim (I preferred the formal look with the Oak trim). I think with these changes and a little more time shopping this can be done for $200.2) Low Profile >> Mine ended up being 2.5" thick.
The extra 1/2" came from the profile of raised trim I chose to go with. If one were to go with a more contemporary look and simply use the wide spotlight frame (no wood trim) you will be at 2". If you are willing to dado a 1/2" off the back perimeter edges, cut a matching opening in your drywall and countersink the whole affair into your wall you would then be 1.5" proud of the wall surface.
3) Low power >> Even with 4 strings (1200 LEDs total), this is pulling right at 3 amps at 12 volts.
I think this qualifies as success
If you have any questions ask away. If any questions are too price/supply sensitive; you might want to send me a PM.