The reWe first of all reverted to the 'user 1' preset mode in the OSD menu which would allow us access to the individual RGB channels. There is also a 'user 2' mode if you want to set up another preset to different settings. Adjustments were made during the process to the brightness control, and to the RGB channels (gain) as shown in the table above. This allowed us to obtain an optimum hardware starting point and setup before software level changes would be made at the graphics card level. This would help preserve tonal values and limit banding issues. After this we let the software carry out the LUT adjustments and create an ICC profile.
Average gamma had been corrected to 2.2, correcting the default 8% deviance we'd found out of the box in the standard preset mode and leaving only a small 1% deviance. The white point was also corrected to 6530k, sorting out the pretty large 19% deviance from before. Luminance had also been improved thanks to the adjustment to the brightness control, now being measured at 120 cd/m2. This gave us a calibrated black depth of 0.14 cd/m2, and a static contrast ratio of 857:1 which was very good for an IPS panel.
Colour accuracy was a problem though and despite numerous attempts, and numerous calibration tools, we were unable to obtain a satisfactory result. We tried different OSD settings and each time it seems the resulting colours were not as accurate as they should be. This left us with high dE differences but it was not clear why this was the case. This is a shame, as the 'user' presets given you access to the 6-axis colour adjustment which should in theory allow you more control over the hardware settings. As it was, the issues in this preset meant these user modes were largely pointless. Having seen other tests of this screen in the past, we aren't the only ones who've had this issue.
We wanted to see what we could do in the other preset modes, hoping that we could achieve better results.