Originally Posted by Lee Stewart
For the 1080P version, they used 6 million LEDs (2M per color). To go to 2160P, they would need to have approx 22 Million LEDs. If they used smaller LEDs to accomplish that, then the brightness of the images would suffer.
Not necessarily. You're squeezing 4 LED's in the space of 1 LED, and they only need to be 25% as bright each, to maintain the same brightness.
Also, assuming 3 LED per pixel, the exact numbers needed are:
1080P = 6,220,800 LED's.
2160P = 24,883,200 LED's
I have seen ultra-tiny LED's be made, so it's possible.
It's just an expense / fabrication issue. The sheer number of individual LED's.