I think we might hit some common points of agreement, Rob.
I've found that, despite my best efforts so far, the UQ set still retains some yellow blotches
in the skin tones. I have to limit the overall Color level to maintain realism much more than
with my older model that this one replaced. The blue bias in the white temperature covers
a variety of nonlinearities in the grayscale, as always -- a cheap fix -- but not enough to
eliminate all trace of that sulfur powder that finds its way onto some cheekbones.
I think they are using the yellow pixel much more aggressively on these sets than on the
LC series of the recent past. Not only is the yellow used to make the white brighter, but it
is now serving to add detail to the pictures as well. Their paint-by-numbers scheme is flawed.
I've seen articles that point to an abandonment of the Quattron system after this year in favor
of a new backlight LED that has a better color spectrum to work from.
Originally, the Quattron was a way to expand the middle of the color spectrum by allowing
the green to be less yellow and better able to make a tropical Cyan. This worked well with the
CCFL fluorescent pigments because they could be tailored to emit specific frequencies.
I have a buddy with an older Toshiba wide-gamut CCFL and the aquamarine colors are stunning.
These can barely muster a powder-blue. The reason is not the green, but the blue. The white
LEDs are based on a blue LED with a yellow phosphor painted on. All makers use a similar
scheme with the white LEDs. The blue is too violet, though, and mixes poorly with green and
is not the prettiest shade in and of itself. So, the original purpose of Quattron -- to open up the
middle of the color spectrum gamut -- has been replaced by using the yellow for sheer brightness.
This is done by making the blue work double-time with yellow as well as with the red/green.
It is not a wider color gamut anymore. Quite the contrary. Sharp is doing research right now
with a new white LED scheme, though, which promises to return them to good reputation.
They will use a blue LED, coupled with red and blue/green phosphors to get more of the total
spectrum and without the yellow pixel. So far, they haven't gotten the brightness they want nor
the durability of the red phosphor that they demand for their customers, but they are getting
close. Just in time for 4K, they can dump the costly 33% increase in cost that a yellow pixel
imposes. Judging from the high-quality wide-gamut CCFLs of the past, there is reason to hope
that tropical aquamarines will be forthcoming yet again -- and we can say goodbye to sulfur cheeks!
Last edited by johnfull; 07-21-2014 at 01:20 PM.