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Originally Posted by etype2
Gwen Stefani is an American singer, songwriter, fashion designer, and actress. She joined the Voice television show as a co-judge in her first season this year.
To my eyes the yellow sub pixel extends the green-yellow spectrum. Critics say the color produced by the Quatron does not conform to the RGB color standard. The color standard has and was adopted in 1931. Modern televisions are capable of extending the 1931 color standard. There has been a push to get the industry to change the color standard beyond what we have today.
When I bought my set in December, 2011. There was no 4K or OLED. By introducing the fourth sub pixel, Sharp produced a finer pitch panel with 25% more pixels across the screen. I had my set professionally calibrated by ISF (Image Science Foundation) The goal of ISF is to calibrate the set to the standard of the movie producer/studio. This sounds like an oxymoron, then why buy a set with a fourth sub-pixel? Is it just a gimmick to get more sales? For me no. I see an improvement in the color.
I'm retired and home most of the time. Since the purchase, I operate the set all day, about 17 hours a day. If I go out to walk the dog etc, I just leave it on. It is almost 3 years old next month and going very strong with no signs of a dimming or failing picture. I estimate that I have put on over 19500 hours on it. I think the screen shots demonstrate the image well. BTW taken with an iPhone 6 Plus, not a DSLR. Would be better with a high quality camera.
Here is a link to ISF and what they do: https://www.imagingscience.com |
I'm afraid what you have posted is very confused. There is no "RGB standard." What there is, is ITU Recommendation 709, which is used for digital TV worldwide including in the US - the same gamut as the sRGB standard commonly used for jpg digital still pictures. The extra yellow pixel does extend the gamut of this TV beyond rec 709, but when it is properly calibrated the extra range is not used and it does not exceed rec 709, because that is what is broadcast. There have been several proposals to extend the gamut of media, particularly blu-ray discs, but as far as I know, no extended gamut discs have been produced. Each proposal has some drawbacks. Extended gamut standards for production and for broadcast using new digital standards are under discussion in various standards committees.
When you mention 1931, that is the date of publishing of the CIE standard observer, which uses mathematically defined non-realizable primary colors X,Y,Z so that all visible colors may be defined with positive values of these primaries. Some of the proposed production standards use XYZ or other primaries that can cover the full visual gamut.
Obtaining an extended gamut can be done with three-primary displays rather than with an additional yellow (simpler mathematically to get correct), and is currently available in wide-gamut computer monitors as well as very high end specialized professional video monitors used for cinema editing. A wider gamut in the display is also natural for laser displays.
Experienced Photoshop users know that an extended gamut monitor (especially with extended red) has to be "profiled" so that when an image comes from a narrow gamut source, the system reduces the gamut of what is displayed to match the source. Otherwise, colors come out over-saturated. The same thing can happen with the extra yellow pixel, but there the distortion is in colors other than flesh tones, so the viewer has no ready reference of what the color should be and may like the higher (though incorrect) saturation.