Display brightness - Redmi K20 Pro / Xiaomi Mi 9T Pro Questions & Answe

Browsing around internet forums I read about quite a few issues on 9T / Pro displays: it looks like some devices do present uneven display brightness, but higher on one side and lower on the other side.
This issue is visible almost only under low light conditions.
I'd be interested to know how many devices have this kind of issus.
Thanks in advance.

My Mi 9T pro is perfect. No issues at all.
Sent from my Mi 9T Pro using Tapatalk

I was expecting variations across the display at low brightness setting. It's a AMOLED thing, we're told, and as an engineer I can see why the technical challenge exists.
Having said all that, my display seems practically perfect even at low brightness.
Although I tend to be easily annoyed by flickering displays, I haven't found it necessary to switch on anti-flicker mode (DC brightness control). I can see why that might make the display brightness more irregular.

While poll votes are just a little number, is nice to see that the display quality looks good.
Thanks a lot for your feedback!

Related

P20 Pro video footage dimming issues

Hi
I bought a new p20 pro recently and noticed that, when I record footage, the picture goes dim and dark when i pan or move the scene (even slightly) and the bright, and then dark again. That means that when I play back the footage, the brightness level constantly shifts and changes, making it highly annoying and at times the picture is dim enough that its a struggle to see anything (yes even in broad daylight).
Is there a way to turn this dynamic brightness shifting off or is this a faulty phone?
rippahsun said:
Hi
I bought a new p20 pro recently and noticed that, when I record footage, the picture goes dim and dark when i pan or move the scene (even slightly) and the bright, and then dark again. That means that when I play back the footage, the brightness level constantly shifts and changes, making it highly annoying and at times the picture is dim enough that its a struggle to see anything (yes even in broad daylight).
Is there a way to turn this dynamic brightness shifting off or is this a faulty phone?
Click to expand...
Click to collapse
Hi, did you ever get a reply elsewhere or found the solution somewhere?
My wife's P20 Pro has the same issue. We always accepted the way it is, but only know i thought of finding a solution to it...
Hence curious if you managed to fix it?

Info display

hello, I wanted to know if it can depend that the two terminals in comparison have different processors, because I noticed that the hue of the whites is different even if only slightly. then strange thing that opening Youtube, on one the whites are lower and on the other more brilliant when the brightness increases and so also with blacks putting in black mode.
Andeoid01 said:
hello, I wanted to know if it can depend that the two terminals in comparison have different processors, because I noticed that the hue of the whites is different even if only slightly. then strange thing that opening Youtube, on one the whites are lower and on the other more brilliant when the brightness increases and so also with blacks putting in black mode.
Click to expand...
Click to collapse
Are you watching same video ?
Are both phones have same screen mode set in settings ?
Did you turn off automatic brightness in both phones ?
Is video enhancer off in both phones ?
If any of those settings are not same on both phones then screens may show colors differently.
the phones have different professors, I do not know if it can make the difference. first problem solved that of the brightness of Youtube, it was set video optimizer and did increase the brightness. the second thing if, for example, you open the cell settings menu, you notice that the two white ones, even if few are different, one is more on the clear cold, the other more on the warm similar ivory.
can it depend not only on the different cpus, but also on the software based on the country of origin that has this management of the different white?
Inviato dal mio SM-N9600 utilizzando Tapatalk

DC dimming issue

Do anyone also experiences uneven shades of dark gray with dc dimming is on?, or it is just my mi 9t pro global has a defected amoled screem? Any feedback will be much appreciated.
The apps that I used to reproduce the uneven shades of gray are the chrome, xda and youtube in dark mode if that helps. The darker shades of gray's location on screen doesn't change even in switching between the mentioned apps.
Well you clearly didn't read. It literally says right under the DC dimming feature that it may affect image quality. Amoled Displays run off of constant voltage using PWM to reduce the brightness. DC dimming invovles lowering the voltage to lower the brightness causing small color shifts and stuff. There is nothing wrong with your phone
crzykiller said:
Well you clearly didn't read. It literally says right under the DC dimming feature that it may affect image quality. Amoled Displays run off of constant voltage using PWM to reduce the brightness. DC dimming invovles lowering the voltage to lower the brightness causing small color shifts and stuff. There is nothing wrong with your phone
Click to expand...
Click to collapse
I did read it, but i did not expect that it will be that much impact to the color quality of the display. I also just want to know if others are experiencing this as much in mine or just subtle, that is barely visible. Very thank you for your feedback you good sir :good:

Another greenish tint/hue screen, ambient EQ to blame?

Can anyone provide a picture of 2 phones or the same phone with separate pics actually showing ambient EQ doing it's thing? I tried having it on and off for long periods of time and I've noticed what seems like no difference in color temperature. I just got this XL off swappa a few weeks ago and I came from the 2 XL which has a totally different color experience. I like the color and temp on the 2 XL over this 4 XL but what's boggling my mind is the settings and if they are what is causing the issues! I've read that a ton of people are having issues with this greenish tint/hue at lower brightness and it seems as though this phone has the problem as well. It's killing me as the screen always looks like I have a low level of night mode on, it's super warm and will turn grays to greenish hues at lower brightness. I wonder if ambient EQ that is supposed to be dynamically adjusting screen temp and colors based on ambient light is just basically broken and THAT is what is causing so many issues with the color temp and washed out vibrancy. I've tried all the suggested settings about forcing 90Hz, AOD, etc etc but nothing seems to change this. Infact 90Hz just being on in the normal display settings makes it worse. I did a split screen with settings and chrome on this website (I have dark theme enabled) and toggled smooth display and I can see it get MORE greenish when on so I've turned it off for now. Anyone else think that ambient EQ might be the root of the issues? By the way, I factory reset this phone like 4 times already when I first got it thinking that might help but it has not. Thoughts??
Blame samsung. Oneplus 7t which also has 90hz refresh rate suffers the same issue

Question Screen tint, mostly at low brightness, and a bit jumpy brightness change when adjusting brightness manually – is that a hardware defect?

Hey. I fixed the issue with my new 8gb/256gb Redmi Note 10 Pro from the previous thread, but now I noticed something else. Dark grey areas get tinted rather noticeably at low brightness, but also for some reason at a couple of additional brightness points along the brightness slider; it is more noticeable if 120hz is enabled, and at minimum if Standard color scheme and 60hz are used. Also, it seems the brightness dips about two thirds up the brightness slider, so the screen seems to flicker in brightness when manually adjusting across that brightness point; it's currently night here and I haven't checked if it also noticeably happens during auto brightness at daylight.
So regarding the tinting – I found other people mentioned it, some claiming it is "normal for AMOLED screens", but some RN 10 Pro users then said their screens don't do that and actually the AMOLED screen on my older 9T didn't seem to have this issue.
Regarding the "jumping brightness" – I'm not sure I've seen references to this, but either way it also seems a bit like a hardware issue with how the screen handles different currents.
What do you think? Does it sound like I should ask to replace the unit? I'll also mention I saw Netflix very occasionally stutters, although that would more likely be related to software optimization.

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