Could anyone with a colorimeter test the color uniformity of the 65" 2018 LG OLEDs?
I have attached a screenshot of the uniformity report generated by DisplayCal for my LG65B7, manufactured November 2017.
As you can see, the brightness uniformity is pretty good, but when the color uniformity is taken into account, the errors go to as much as 10 dE from the middle of the screen. The black & white movies show as black & white, there's no strange color in the black & white image, and white snow is white snow all over the screen. However, when looking at white backgrounds, like those output by a PC, you can spot tints exactly in the areas the colorimeter shows large dE errors: the right hand side of the screen, the top left, and bottom left have a red tint, the middle of the screen appears as greener by comparison, while the vertical column near the left side of the screen is yellowish.
For me, this is the thing I am interested in. The vertical banding at 5% and so on changes, and has improved in time. However, the white background color tinting has not changed at all. If the manufacturing process has improved and the panels don't exhibit this kind of tinting, I will be interested in acquiring a 2018 OLED.
To generate such a report it took me 15 minutes with a id1Pro colorimeter than can be easily moved from one spot on the screen to the next. These are the steps to take:
- download the ArgyllCMS
archive and unzip it some place (for a id1Pro on Windows, there's no need to install drivers or anything)
- download DisplayCal
(I usually just take the archive, unzip it, and double-click on DisplayCal, but there's also an installer)
- open DisplayCal, use File -> Locate ArgyllCMS executables to point to the bin folder inside the folder where you unpacked the ArgyllCMS archive
- use Tools -> Report -> Measure device display uniformity -> 9 x 9 patch layout
- the grid will show up on the screen
- place the colorimeter inside a patch, and click on the "measure" button inside that patch to take the measurement; then move to another patch and so on
- when you are done with all the patches, press the ESC key on the keyboard, and the report is generated
There's no need to use colorimeter correction files, what matters are the relative differences between the different spots on the screen, not the absolute values measured.