Reading up a bit and putting 2+2 together, I think Sharp is now using a green and red
phosphor combination with the blue LED to make a wider gamut. It was tried on high-end
laptops to give them wider colorspaces and I think that was enough proving ground for Sharp
to make the switch. They had been using a blue LED with a yellow phosphor that actually
radiated in the yellow spectrum and not just appearing to be yellow by combination of red and
green. This gave them a big advantage in brightness with the yellow pixel and the strong
blue LED combination. I can say that my Q+ has much stronger red than the 2 year old
Quattron that it replaced, but the blue LED is the same and slightly too violet to mix well with
green to make Cyan. The big mystery is whether or not the blue is altered in any way to get
closer to an ideal mixing color. Brightness will have to be derived the old-fashioned way
without the yellow pixel and the green will have to mix both with red and with blue, so it is
a bit hemmed in now. Meantime, I have my UQ17U pegged in both saturation and value in
the CMS Cyan channel and the Blue dialed towards warmth (green) to achieve a pleasing
picture AND get the benefit of high brightness from the Yellow pixel. Some fleshtones still
suffer a bit of the sulfur-cheek problem from too aggressive an algorithm on the yellow, though.
Some may have to do with the Enhanced Resolution, too, because the old Quad Pixel Plus had
a tendency to make certain test patterns turn yellow. It is good to see Sharp return to earth
without the Yellow for the next generation. How about a blue/green 4th pixel next time around?
That would open up the side of the color chart that is remote at the moment, but would not do
a lot for overall brightness the way that the Yellow did -- less bang for more bucks...