In another thread, I've been having a conversation about the white point:
This fellow has posted the results of metering the white level after optimizing with a 10-point adjustment:
The values bounce all over the place from one point to the next. These would show up as multi-color banding on a grey vignette screen.
Wouldn't a professional calibrator compensate for these variations with a bias towards blue the same way that laundry is dyed blue to make whites brighter?
My own preference is to push green-red instead of blue in order to make a mask that is biased slightly yellow.
Also, a question on the mechanics of these sets -- does the white balance have anything to do with linearity of red, green and blue response?
In old CRTs, the screen and drive controls affected everything about each primary color. In LCDs, this effect would have to be simulated. Is it?
My TV came out of the box with the purplish-blue white of LED Christmas lights and red highlights were magenta. It looked like a decrepit CRT with poor red phosphor.
I had to make 2 separate adjustments -- the white balance in the 10-point white temperature and the red gamut in the CMS.
It was an odd coincidence that both effects occured simultaneously, but both owed to the blue predominance in the LED backlight source.