yes I have. I use it on a Panasonic 55"...I just ran it across the top of the back edge...about 1 1/2 inches from the top edge...plugged in to the TV USB port turns on and off with the TV...since it has no dimmer...the tilt would reduce the reflecttion off the back wall making it seem a little dimmer...its not too bright others wise...I like it....I have on each TV(3)....JimC
That sounds like what I did, and the results were quite satisfactory. I started near the USB port on the back, went up one side of the back several inches from the edge, made a right-angle turn, then across the back near the top, another right angle, and down near the other edge. The tape does not do a "flat" bend very well, so in my case, about 2 inches of the tape did not stay stuck to the TV case. I planned for the bends to be between 2 LEDs, so now those two LEDs shine more outward than backward. The resulting dispersion of the light works fine for me.
I have used this with an active 3dTV. I have found the flickering to be un-related to the 3D, as it sometimes flickers a little bit whether using 3D or not. I usually flick the light that is having an issue, or unplug the lights and plug them back in, and that usually fixes it.
Mounting in the center will work but being only 1/2 inch from wall the spread will be limited. Perimeter would be better. With such a large tv you could get two and go round the entire thing with some overlap possibly. You can mount it any where you like it is just like a sticker but it must be behind the tv or it will distract the eye.
I've read that if u don't get the led color right (Kelvin) then the colors will not look correct, so you can put something together, maybe to help with eye strain in really dark rooms, but then the colors might not be correct. If say just spend the few dollars, I have it on two tvs and it really does make a big difference.