Would it be easy to control them and power them with 12V?
Easiest would be to buy a 10w led off ebay for 6$, then buy a 5$ 10w led driver with an enable pin you can pwmbut as for those I've opened one up before but ended up putting it back togetherI imagine you may have to cut off the led itself and make a new driver, it has a little transformer to drop the voltage then a circuit to condition that to dc at the appropriate voltage level for the led, probably designed for constant power not being switchedyou could switch the led maybe from that driver but I doubt the constant current part will like its output being taken away and put back 800 times a second
If you ever see a broken/used lcd in the garbage, grab itbehind the screen are a couple sheets of plastic and disffusers that work great for stuff like this, usually 15 minutes worth of taking apart but its worth it for free
Yes, actual sheets that'll difuse pretty wellI haven't taken apart an led tv yet, just the regular fluorescent ones, led may be different
Idk, but lol not calculators, im talking about like 42" lcd tv'sgiant sheets that are easy to cut with scissors to any size u want