My professional experience is that blue sub-pixels for a 5500K balanced white use about 50% of total power (rather than the 66% you show). My understanding is that this is because even though Blue 460nm is shorter wavelength (higher photon energy) than RG(530&610nm) it is also less significantly less bright (in photons/sec/solid angle).
I've struggled to find a good webpage, but roughly in subpixel power% it comes to 45%+35%+4x(20%)=160%. By improving blue efficiency it could become 45%+35%+20%=100% and require only ~2/3 of the original power and total display power efficiency by ~50% (ignoring all the computation, RC losses, coms, etc).
White balanced power is independent of the number of pixels (or pixel arrangement) such as RGB vs RGGB, but RGBW or RGBY or RGBC can improve efficiency (and reduce this relative improvement %).
I've struggled to find a good webpage, but roughly in subpixel power% it comes to 45%+35%+4x(20%)=160%. By improving blue efficiency it could become 45%+35%+20%=100% and require only ~2/3 of the original power and total display power efficiency by ~50% (ignoring all the computation, RC losses, coms, etc).
White balanced power is independent of the number of pixels (or pixel arrangement) such as RGB vs RGGB, but RGBW or RGBY or RGBC can improve efficiency (and reduce this relative improvement %).