I often see color uniformity issues on amoled panels especially on whites or in greys. For those who have a keen eye and know how to check, how is your screen uniformity? Post some pics on what image you tested it with.
I've had 2, I'm a printer( so see everything?) and have noticed the screen to have the top edge red and bottom green, sent one back but the new one had the same thing. Any one else notice it? Or maybe I should get some 3D GLASSES ?
Its a very common quality control issue on AMOLEDs even on the latest Note 7 it is still an issue, Aside from the Galaxy S1, I have yet to see a uniform AMOLED panel especially in whites and greys.
Got my Mi 8 from chinese aliexpress seller last week and noticed right away after turning the phone on that colors look washed out. Did some more testing later and noticed that some parts of display are really unevenly lit when using brightness under 50%. Also it has visible vertical lines in low light and low screen brightness. I get color banding in almost all gradients in images. I compared Mi 8 to Nexus 6 that I have been using 4 years now daily and the nexus screen is far better than mi 8. No banding, colors look great and I dont even get any uneven areas in low brightness.
Has anyone had any quality problems with mi8 screens?
I am yet to get response from seller. I would have bought the phone from local store with better warranty but they are yet to get any phones in stock.
My device is also affected by vertical color banding, more people have this issue.
Could give some examples?
infraredmidget said:
Got my Mi 8 from chinese aliexpress seller last week and noticed right away after turning the phone on that colors look washed out. Did some more testing later and noticed that some parts of display are really unevenly lit when using brightness under 50%. Also it has visible vertical lines in low light and low screen brightness. I get color banding in almost all gradients in images. I compared Mi 8 to Nexus 6 that I have been using 4 years now daily and the nexus screen is far better than mi 8. No banding, colors look great and I dont even get any uneven areas in low brightness.
Has anyone had any quality problems with mi8 screens?
I am yet to get response from seller. I would have bought the phone from local store with better warranty but they are yet to get any phones in stock.
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May be a faulty display. Other people had the same problem:
https://forum.xda-developers.com/mi-8/help/screen-vertical-lines-aka-banding-t3825905
https://forum.xda-developers.com/mi-8/help/bad-quality-screen-mi-8-t3834943
https://forum.xda-developers.com/mi-8/help/mi8-faulty-amoled-display-t3859897
I have not had any screen display/quality issues with my Mi8, however i have the newer 8gb/128gb phone version. There was a test done on the Mi8 screens, and they are Samsung OLED screens made by Samsung -the same ones in their phones (just cooler color tuning through software). Here is an in-depth screen review on the Mi8:
https://www.devicespecifications.com/en/editor-review/4f1676/3
I would have to agree that you probably have a defective unit, or maybe you have a refurb/repaired phone that they replaced the screen with a cheaper version?
Agimax said:
There was a test done on the Mi8 screens, and they are Samsung OLED screens made by Samsung -the same ones in their phones (just cooler color tuning through software).
I would have to agree that you probably have a defective unit, or maybe you have a refurb/repaired phone that they replaced the screen with a cheaper version?
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Sorry for not posting anything regarding my screen situation. I have been contacting last 3 months every week to Aliexpress support trying to get this solved, seller won't respond and for some reason I can't get warranty, they wont tell me why. My old Nexus 6 died a while ago and I had to use this piece of crap now. Below you can find picture regarding the problem. Its not glare from external light - screen has this inequality and banding can be seen too. Compared to my nexus 6 of course. Both phones at ~50 % brightness in complete darkness.
I might try sell this phone for as faulty or get some kind of compensation from seller and then buy 6T. No more xiaomis' for me.
https://snag.gy/w17UtG.jpg
Just requested the return of my Mi 8 due to an AMOLED issue.
Shades of dark gray aren't uniform. This is visible in darker environments (like in the bedroom at night).
This is most visible on Reddit dark mode. I can see it on Spotify if I look hard.
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I'm waiting for the e-commerce store's response. They claim that this has to be validated via their tests.
Also, I'm wondering what my odds are with AMOLED... If I get a replacement, will I get a significantly better display or potentially find another set of issues if I look.
What do you reckon are my odds if I go through with the replacement?
OLED screens in general are more problematic displaying dark shapes of grey compared to IPS panels. This has to do with manufacturing tolerances of individual light-emitting pixels at low current. This, in particular, is the reason why most OLED panels employ PWM (flickering) to control brightness, applying higher current in short pulses compared to applying constant low current. If you search for "LG G Flex 2 screen uniformity", you'll see some pretty extreme example of this.
That said, with each individual OLED panel and depending on your personal tolerances, your luck may vary. My Mi 8 is very acceptable when displaying dark shades of grey (I don't notice the problem even if it is there). If you received my Mi 8, there is a chance you could spot the issue because your personal tolerance of the problem is lower than mine. My wife uses an LG G Flex 2 and never notices the (very real) problem with its display uniformity (I do!)
In other words, most users are happy with their displays, but it does not mean all of them got a perfect one.
anthroplus said:
Just requested the return of my Mi 8 due to an AMOLED issue.
Shades of dark gray aren't uniform. This is visible in darker environments (like in the bedroom at night).
This is most visible on Reddit dark mode. I can see it on Spotify if I look hard.
---
I'm waiting for the e-commerce store's response. They claim that this has to be validated via their tests.
Also, I'm wondering what my odds are with AMOLED... If I get a replacement, will I get a significantly better display or potentially find another set of issues if I look.
What do you reckon are my odds if I go through with the replacement?
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That's normal. It happens with every AMOLED display. I have a Samsung S8 and it happens in the same way.
It's something common, don't be scared.
Grana_10 said:
That's normal. It happens with every AMOLED display. I have a Samsung S8 and it happens in the same way.
It's something common, don't be scared.
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That's right I have this issue on my note 9 too. My previous note 9 had this and devices in store had this.
Its normal.
anthroplus said:
Just requested the return of my Mi 8 due to an AMOLED issue.
Shades of dark gray aren't uniform. This is visible in darker environments (like in the bedroom at night).
This is most visible on Reddit dark mode. I can see it on Spotify if I look hard.
---
I'm waiting for the e-commerce store's response. They claim that this has to be validated via their tests.
Also, I'm wondering what my odds are with AMOLED... If I get a replacement, will I get a significantly better display or potentially find another set of issues if I look.
What do you reckon are my odds if I go through with the replacement?
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Click to collapse
"Aren't uniform" meaning you cannot tell the difference in the shades? Grey is a very challenging and controversial color for AMOLED. Use the Display Tester app by Braintrapp from Google Play and try the "Gamma detection" app when you have your device, you'll see it displayed horizontally. Swipe up and down (with the device of course held horizontally, or "landscape" mode) to change the brightness and look at how it displays grey at different brightness levels. Very weird huh?! It's perfectly normal.
I guess you can say it is a "grey area" for AMOLED...
Crossvxm said:
I would have to say you're in for quite a gamble. Most people aren't keen to spot "defects" on AMOLED displays. I am. Coming from a person who has owned many phones of both main screen technologies, I can tell you that the displays can vary even on identical devices. I've owned Galaxy devices with some having a red hue and others not, same when I had two Nexus 6, one had a slightly red hue and seemingly lower brightness at max, the other was perfect. Sometimes manufacturers have different facilities making the same screen, and differences arise. If you do get a replacement, you just have to hope it's from the better batch.
Now to get a better understanding, what do you mean when you say "aren't uniform?" Could you describe a little what you mean and where/when you notice the issue (e.g. videos, pictures, etc.)
Also, did you attempt to set a static color contrast within the Settings? The display does change tones automatically by default. According to the Display Tester app by Braintrapp from Google Play, it seems that our display does not support Wide Color Gamut. Some of the hues seem to be a tiny bit off according to it on my display, and this is coming from someone who owns a Mi 8 with a "perfect" AMOLED display.
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Every oled screen is uneven, clearly visible on dark gray backround in dark room. Even samsungs don't have perfect screens.
Grana_10 said:
That's normal. It happens with every AMOLED display. I have a Samsung S8 and it happens in the same way.
It's something common, don't be scared.
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I have the same issue with pixel 2 xl
I've owned the nexus 6p, OnePlus 5, 5t, 6 and the mi 8.
Tbh I think the mi8 has the worst AMOLED display of all of them when it comes to dark backgrounds in low light. It has like a "jelly scrolling" effect
My avatar on YouTube is solid black and I use the dark mode of the YouTube app....when I'm scrolling through comments i leave on videos with the screen brightness down low there's a noticable trailing effect.
It's not enough to make me want to return it but it's a problem I didn't have with any of the other devices I listed.
I prefer AMOLED to LCD any day.
xyourxhighnessx said:
I've owned the nexus 6p, OnePlus 5, 5t, 6 and the mi 8.
Tbh I think the mi8 has the worst AMOLED display of all of them when it comes to dark backgrounds in low light. It has like a "jelly scrolling" effect
My avatar on YouTube is solid black and I use the dark mode of the YouTube app....when I'm scrolling through comments i leave on videos with the screen brightness down low there's a noticable trailing effect.
It's not enough to make me want to return it but it's a problem I didn't have with any of the other devices I listed.
I prefer AMOLED to LCD any day.
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Coming from OnePlus 6, what motivated you to move to the Mi 8?
anthroplus said:
Coming from OnePlus 6, what motivated you to move to the Mi 8?
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I bought the op6 with PayPal credit. I bought two and with the op6t coming I decided to sell them instead of paying the remaining balance. At first I intended to go with 6t but in the end I thought I'd try something different.
Since the Nexus 6p all of my phones have been stock/near stock. I thought I'd try something else. I like stock better because I feel there's a learning curve to miui if you're used to stock but overall I like the mi 8. I wish I would've waited for the mi mix 3 though. The sliding design is nice.
The full screen gesture navigation is the best button free navigation I've tried. I haven't used the buttons since nearly the beginning of owning it. It'll suck when I decide to use a non-xiaomi device. I didn't like OnePlus or stock gesture navigation
well i gotta say, i was afraid to get an bad Screen, too. Especially after reading threads like this. But i can say my screen is perfectly fine. even in lowest brightness. Yes The grays are not that gray as on the screen as on lcd, but thats the same with all amoled screens, and you only see it when u have the exact same app on an lcd screen beside your phone. For the rest its super fine.
Yeah. After 3+ months of using the phone, I’m learning to just enjoy it naturally without nitpicking details that don’t practically affect my everyday experience.
If we treat the phone like a baby, there’s an endless list of concerns.
But if you really just use it like you would (without analyzing scenarios that don’t come naturally), so many of these issues don’t matter at the end of the day.
I think the green is much more problematic on amoled displays (on low brightness / Oled Tool)
Sigray said:
I think the green is much more problematic on amoled displays (on low brightness / Oled Tool)
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That's exactly what I found.
Now, having said that, we don't use oled tools for practical purposes.
I basically don't notice the issue at all under normal use.
In other words, if I never did nitpick at first, 3 years of normal daily use could pass without me noticing the issue at all.
Do most OLED screen on Samsung smartphones like the Galaxy A20 get the screen burn in problems, and do LCD displays get screen burn in?
Do most OLED screens on Samsung phones get the screen burn-in problem after 1 year?
Ethrelin said:
Do most OLED screens on Samsung phones get the screen burn-in problem after 1 year?
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Yes.
Happened in all my samsung phones.. Except my current one, the s20+ but it's probably because it's still new.
My note2, my s7 edge, my note 8 all had the burn in problem. When you are close to the end of warranty, quickly look at the screen carefully for any burn in marks. If there is, quickly go change the screen under warranty, for free. 1 year later the burn in will still occur but at least it's 1 year away.
Even my sony xperia z3 has the burn in problem.
Sent from my SM-G985F using Tapatalk
Why do smartphones have OLED screens if they get burn-in problems easily and quickly and has pulse width modulation and can damage the customers eyes or blind them and have, this doesn’t seem safe?
@Ethrelin
Devices with OLED screen, you can expect exceptional picture and color quality. One thing you may not expect, however, is for remnants of the picture to get "burned in" into the display. Permanent damage to your OLED screen isn’t likely. How long it takes for "burn-in" to occur depends on a few factors, such as brightness and contrast settings, the size of the screen and the image displayed, but it’s likely to take hours before any noticeable discoloration will set in.
So-called "burn-in" is just “image retention”. The ghost image you see is actually just transient image persistence. This is a temporary discoloration and will go away after a short period. OEMs like Samsung consider "burn-in" to be normal "wear and tear".
Hello, I hope you are well
My phone screen shows a shallow black color and is almost grayish in color
Of course, it is compared to the s8 plus phone
Mine's no different from any other LCD phone screen I've used recently
Not as "true black" as an OLED / AMOLED screen, but it's not really possible for it to be, given how the different technologies work (guessing you're comparing it to the AMOLED screen on a samsung galaxy s8 - that would definitely look different). Your eyes should have adjusted by now!