12-08-2019 08:46 PM
I have a P1 Gen 2 with the 4K touch OLED screen panel. When the display is showing bright white or dark gray images, there's a noticeable set of vertical color bands on the screen. Even though the image should be a single, consistent color, I can see two distinct colors, with the 2nd and 4th fifths of the display (left to right) being darker than the other parts. I opted for the X-Rite color calibration from the factory, so was disappointed that the color accuracy of the display is not up to the standard I expected.
Is this color banding normal? Should I get the display/unit replaced?
12-09-2019 11:37 AM
I have this issue, too, and I don't think it is normal.
Is this what yours looks like? I have both vertical and horizontal bands that are darker or lighter.
12-09-2019 02:29 PM
I'm seeing reflections from the anti-reflective coating that maybe what you are seeing. Can you take another picture in a darkened room with no other lights on in the room?
12-09-2019 06:14 PM - edited 12-09-2019 06:20 PM
Here's one taken in a dark room. There are NO reflections on the screen. There are obvious dark and light bands, both vertical and horizontal
Here is what the background color is set to:
12-09-2019 06:54 PM
I have a similar lower brightness pattern (vertical blotches) on my P53 OLED screen in the same relative area as your panel, but I do not have any horizonal patterns and the visual effect is not as severe. I can only see them at very low brightness levels. Searching the web I found other complaining about OLED uniformity on dark grey backgrounds, but I also found that some people had this eventually go away with use. I can't see any banding or color splotches in normal use.
12-09-2019 07:00 PM
It's really annoying on programs with fairly dark backgrounds. MS Teams in dark mode, for instance. It was also obvious on first ever boot when it was new with the Win 10 blue background.
I'm two months in and it is not subsiding.
12-09-2019 07:10 PM
Agree, but my unit seems to be diminishing in the variations. One of my measures is the Windows 10 blue/teal screen when shutting down. One thing that you might try is the Display HDR test in the MS Store. It runs all through the color in solid mode and in various patterns. When I run the solid colors I see no variation for green, red, or blue yet when I look at dark grey I can see the variation. I don't truly understand why the combination of colors does one thing and the color separation does another. I'd be interested in your observations.
12-09-2019 07:18 PM - edited 12-09-2019 08:01 PM
Just tried another variation. My panel was factory calibrated and I am usually using the DCI-P3 color management profile. HOWEVER, when I switch to using the "DEFAULT" profile, almost all of the blotches go AWAY! I tried to see what happens on the HDR test. Runing the test pattern for grayscale with DCI-P3 calibration, I lose the bottom boxes going from dark gray to black (Nits 2.5, Nits 2.0, Nits 1.0, Nits 0). Properly calibrated display should only show Nits 0 as black. This it does when using the DEFAULT calibration. Interesting observation. Can you repeat the experiment?
12-09-2019 08:22 PM
That banding looks a lot worse than mine--seems unacceptably banded. Interestingly, your screen has distinct stripes, whereas the color variation on my screen is more in splotches. Are you planning to have Lenovo replace the unit or panel?
12-09-2019 08:24 PM
I have found that playing with the color calibration settings can help reduce the effect of the splotches, and I found that DCI-P3 works the best for my screen. It's unfortunate that this is an issue at all, though. Based on your experience, I think I'll give my screen a few more weeks to see if the issue works itself out. If not, I'll see what Lenovo can do about this. I don't think this issue is acceptable on devices as expensive/high-end as these ThinkPads are supposed to be.