Originally Posted by rberger
I don't see evidence of 'running out of red' at high IRE from looking at red on the luminance or RGB graphs.
If you were to measure above white patterns you would probably find a difference between contrast set on max and contrast set lower. If 0% to 100% is fine, then that's good and you can ignore above white. The only reason I mention above white is that I find it a little easier to tell the trend happening at the top of the grayscale by measuring above white.
There are no independent RGB gamma controls on the Samsung 6 Series. So what's the best way to get my red and blue gamma to more closely track to 2.2 at the high IRE range?
Dropping contrast might tend to even out gamma, at the expense of less top light output. I think those TVs have a main gamma control, so that might tend to raise gamma across the board. Generally if your point gammas on 10% measurements are between 2.1 and 2.2 I might tend to say to forget it and call it good.
I guess my question is why is my gamma tracking for red and blue poor between 70 and 90 IRE when they look pretty good on both the luminance and RGB charts?
Gamma is basically how the display changes in brightness. The RGB chart doesn't show gamma. The RGB chart just gives how close the colors are to an even gray.
If you're using HCFR, personally I don't like the luminance chart because it's normalized for each color. If the luminance chart wasn't normalized it would be a lot easier to describe how exactly your display functions. A better representation of how your display functions is to look at the measures page and to set the pickbox to display RGB. Of course that's not a graphic and it doesn't give a gamma reference, but it does better represent how your grayscale actually measures without the abstractions of the graphs. The main idea is that if red, green, and blue are even then you're at gray like the RGB graph shows. Higher RGB numbers indicate brighter values, and lower numbers indicate darker values - similar to the luminance graph without the normilization.