Along with Flanders Scientific (FSI - manufacturers of professional grading displays and LUT boxes), and a number of our professional LightSpace CMS users, we have been looking at HDR TVs and methods for accurate calibration - specifically for grading work.
What we have found may be of interest to some home cinema users, especially those with LUT boxes.
(Even the eeColor if the source input HDR signal can be down-res'd to HD resolution - HD resolution HDR is a valid format after all...)
The big issue with the use of consumer TVs for grading work has been they cannot be accurately HDR calibrated, due to a combination of limited internal CMS capabilities, and the 'burnt-in' EOTF, with roll-off.
But, we seem to have found a couple of exceptions...
With LG OLED Series 7 (and possibly series 6), and Panasonic DX900 TVs (and others possibly?) you can use the service remote/pro settings to manually force the display into 'HDR On' mode from the service/pro menus.
When you do this the display goes to its true peak luminance output without requiring HDR metadata over the HDM connection and without triggering a ST2084 EOTF. The upshot of this is that because that HDR metadata is not present the display doesn’t apply the PQ EOTF. So you get max nits output with an EOTF that is much closer to a power curve than it is a PQ type response, with max gamut.
This can then be accurately calibrated via an external LUT box.
This does suggest there could be a very workable way of using the LG OLED/DX900 TVs + LUT Box for HDR calibration... with accurate EOTF and colour calibration.
The above shows a Series 7 LG EOTF calibrated for grading, with no roll-off.
Obliviously for home use roll-off should be applied in the LUT, using the setting available within LightSpace CMS.
For those with a Lumagen Pro this would be a way to perform very accurate HDR calibration.
And the HDR calibration can be any of the available standards within LightSpace CMS.
ST2084 (all PQ based HDR standards)
Just info for interest.