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What should I use to filter/diffuse LED back-light?

post #1 of 8
Thread Starter 
Specifically, how can I use a white LED to back light a specif color, what material works?

The "MSI" logo here glows yellow due to the LED passing through the yellow material.



I want to remove this filter and replace it with the same material to create blue lighting.



Rep to anyone who can provide me links to the proper material!
post #2 of 8
Im going to assume the yellow "filter" is just a translucent piece of plastic. So take a frosted piece of acrylic as thin as you can find and cut the tiny rectangle out of it and replace it with that. Then stick a translucent film on it of any color you chose?

Or just get a colored piece of translucent plastic... http://www.eplastics.com/Colored_Plexiglass_Acrylic_Sheet_Translucent
3mm thick should be good I GUESS. maybe thinner is needed depending on the way the heat sink is, i don't actually own one so i cant check. Either way you could just sand it thinner
Edited by Archer S - 8/25/13 at 7:41pm
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post #3 of 8
Thread Starter 
Quote:
Originally Posted by Archer S View Post

Im going to assume the yellow "filter" is just a translucent piece of plastic. So take a frosted piece of acrylic as thin as you can find and cut the tiny rectangle out of it and replace it with that. Then stick a translucent film on it of any color you chose?

Or just get a colored piece of translucent plastic... http://www.eplastics.com/Colored_Plexiglass_Acrylic_Sheet_Translucent
3mm thick should be good I GUESS. maybe thinner is needed depending on the way the heat sink is, i don't actually own one so i cant check. Either way you could just sand it thinner

Good idea, any idea where I can get a cheaper smaller piece? I've never cut plexi either, I'm assuming it doesn't crack easy.
post #4 of 8
it doesnt crack easy at all. Uhm ive built a fair amount of things and have gotten pretty good at improvising. Here is what i would do personally: go to a dollar store and buy yourself a plastic ruler. Either a see through blue one or a clear one. Then ideally if you have a dremel, cut it with that and a cut off disk (it melts through plastic, not very cleanly but whatever you wont see edges). If you dont have a dremel, a fairly large amount of passes with a box blade will score the plastic enough for you to just snap it cleanly with a decent amount of force. Take some wood files, and some sandpaper, clean up the edges a bit. Optionally if you want a frosted look sand one of the surfaces of the plastic so its less see through. And you're done, stick it in. If you end up with a clear ruler give it a small coat of blue translucent paint, you can find it at hobby stores.

http://img.artlebedev.com/everything/lineikus/lineikus.jpg rulers as an example

You will likely spend less than $5 total
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post #5 of 8
I bet there's something in your house right now you could use. A tupperware container. A wrapper. A pill bottle. C'mon man, put some effort into this. A CD case. A plastic bag. Do I really need to keep going? A soda bottle.
APU what?
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APU what?
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post #6 of 8
Quote:
A tupperware container

Didnt even think of that! all of my tuppers have blue lids, its perfect
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post #7 of 8
Thread Starter 
Thanks guys thumb.gif I'm definitely going for a professional look, so I'll see what happens.
post #8 of 8
post pics of the process smile.gif

Also i know that feel, wanting it to jsut look perfect. that same feel is making me consider swapping out the surface mounted LEDs on my video cards to a different colour. But i dont trust myself with a soldering iron that much just quite yet,
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