I don't know if its been thought of for NBTV i will try and explain ,bit busy with other stuff at the moment to try it .
I was looking into wireless power transfer circuits a high frequency oscillator to a power transistor to a coil and another coil a short distance with either just a led across it or a tuned circuit with cap and led cross the coil receiver .
Works fine just like a rotary transformer up to a tesla coil all the same sort of idea what had me interested was the question for our hobby if the high frequency oscillator has the bandwidth and say using a 555 and we modulate the thing with nbtv and send this to the simple led coil receiver which could be an led in a Nipkow disk hole as it rotates each led with its own little coil would light and be modulated as it crossed the path of the transmitting coils field .
https://www.youtube.com/watch?v=xNursvvJv9U
The problem of rotating a number leds one for each line as for say a Led Nipkow or drum ,you could have some thing like a rotary transformer to power some rotating electronics or an on board battery which drive the led's or a commutator of some sort its a bit noisy and or complicated .
The idea might work well with the led idea like on my old clear led disk but with flat no lens leds as in pictures no holes needed just a mask might even be enough light to make a projection monitor with a lens .