After having 2 LG green screens I finally got a BOE panel last week. I then checked it immediately in dark conditions and all looked good.
Fast forward 6 days and I'm now starting to notice a horrific screen uniformity issue (not green though) and my eye is constantly drawn to horrifically over zealous CABC (Content Adaptive Brightness Control) that is employed on this device.
I'll start with the uniformity issue.
Whilst I completely understand that all OLED panels, to some degree, have their issues with uniformity this BOE display is probably the 2nd worst I've ever seen. There are white bands running vertically up, I currently count 5 of them and they are unevenly spread. On top of this the entire bottom 3rd of the screen is lighter than the top 2/3rds. To be fair, this issue can only be seen using a 5-10% grey image and in low lighting conditions however, since I use my phone at night, it is still visible when using apps like XDA and Spotify which makes me doubt I'll be able to live with it.
The 2nd issue is a very difficult one to explain and it's not limited to the BOE display (both my LG panels exhibited this behaviour too.) The CABC is overly aggressive and, as far as I know, it cannot be turned off. This adaptive brightness can be seen working its horrible magic under this set of circumstances:
1) Go to YouTube app on your phone and apply night mode.
2) Start watching any video you please then switch to landscape mode.
3) Tilt the phone back to portrait position.
4) Now notice the dark patches in the comment section (mostly on the right edge of my screen). See them? Yeah? They shouldn't be there.
This is again a very specific scenario but I assure you what you see there is happening all the time, you just haven't noticed it. I've watched videos on youtube with dark grey backgrounds and white images on the screen and the CABC just goes mental, like it doesn't know how to process the information on the screen. It's ridiculous.
I've also had major artifacts appear on static grey images whilst checking the uniformity. The worst being a huge, moving black splodge with a tendril poking out from it that would move when I zoomed in on the grey picture!
Whilst I can hope that Huawei can fix this via a software update I fear that not enough people will notice it to report it.
So if you could check to see if following my steps work and report back, that would be greatly appreciated!
So close to returning this device but as I'm now out of my 14 day cooling off period I'm now stuck with this device for 2 years. I have 10 days left to return a faulty device but I'm not even sure it's worth playing the lottery with screen manufacturers AGAIN!
Thanks for sticking with me if you read all of that, feel free to let me know if you've had any issues with your BOE panel too, it'd be nice to know that I'm not the only one!
TL;DR : Screen uniformity at 5-10% grey is awful on BOE panel and the aggressive Adaptive Brightness causes artifacts on the edges of the screen that are extremely noticeable in videos (YouTube/Netflix)