Thank you. You are, of course, correct about the gamut. With QDs, the wavelength of the emission peaks can be adjusted with a remarkable degree of freedom, allowing the gamut to be increased as you describe. “Triluminos” does not replace “x.v.Color” but may complement it. X.v. Color really didn’t go anywhere despite extensive promotion by Sony. Now that Triluminos provides a larger gamut that can support x.v.Color inexpensively, sources tell me that Sony is have a conversation about whether it makes sense to once again implement and promote the x.v.Color standard.

On the Sharp sub-pixel-sampling 4K, Candice Brown Elliott of Nouvoyance has made the same point you did. I think I’m at fault here. Sharp certainly claimed 4K, but I now realize they may NOT have claimed 4Kx2K. I will check to make sure.

The gamut of the QD backlight is not necessarily larger because the spectrum has narrower peaks, but because the red and green peaks have been shifted outward. This allows a deeper red and a more saturated cyan. I would expect something closer to the DCI P3 gamut. I get the impression that the Triluminos trade mark will replace “x.v.Color” ?

You have explained only how Sharp can talk the horizontal resolution up from 2k to 4k by making clever use of subpixel sampling. Which they have learned from my colleagues at Philips, by the way. (And due to 4:2:2 or 4:2:0 sampling you need 4k resolution only in the luminance, and only 2k in the chrominance.) You did not explain how the vertical resolution grows from 1k to 2k. There is a clever way, but I’m not sure that Sharp has publicly disclosed it, and I am not free to tell.

Best,
– Jeroen

The implication is both OLED and 4K sets continue to face the “moving target” of LCD improvements, making it ever harder to displace the mainstream LCD technology.

Steve