Originally Posted by rufunky
Actually, I'd love for it to respond to the input on the screen! I honestly didn't even know you could do that. It would be nice to have the option of one static color for movies and change colors when playing music. What would I need to buy in order for it to interact with the TV?
There are a few different groups out there doing this. The whole thing started very DIY with people trying to recreate and supercharge what Philips was/is doing with their Ambilight TVs. That was fixed to the particular TV you wanted, and relatively few zones. Seems people wanted more brightness, more individual zones(/higher 'resolution'), and ability to customize it to integrate with other things. Along then came things like Boblight and Hyperion, and using digitally addressable LEDs. Anyway, depending how handy you are, the best and most customized route is probably to buy a Raspberry Pi, a screen grabber, some APA102 strips, and set it up with Hyperion. To make things a bit easier, a group called Lightberry makes a convenient grabber that takes any HDMI source (as far as I know).
There's also tons of more complete solutions to make plug and play easier. The first one I bought was called Lightpack, and while good, it was using analog strips in segments of 3 (less resolution, and some light 'gaps' around the TV on big TVs, a lot of cables behind the TV, and needed a computer to run the content). They have just finished developing version 2, looks like they addressed basically all of that.
There's another called DreamScreen. I could probably go on... this seems to be an emerging field over the past few years and no one's really seemed to run away with a super simple system that plays nice with other lightstrips you might have when you want to control them all in one place.
Anyway, hope that's not all too confusing. Basically, if you're handy with light programming and tinkering, go with Hyperion/RPI/APA102, if not try something like Lightpack (havent tried 2, but seems a significant upgrade from 1 which I have). I'm also currently working on my own Hyperion/RPI based system. Trying to get it to integrate with Philips Hue!
How big is your screen, and how much space between the wall and the screen do you have? I can't post links to anything yet so you'll have to google the above for more info, sorry!