Spots under the display - Xiaomi Mi 9 Questions & Answers

My Mi 9 have spots/stain under the screen, its visible in dark room with low brightness, especially when displaying on apps with grey/dark backgrounds.
Anyone else have something similar?

call me crazy but i think they could be sensors. the one spot i have is exactly where the in screen fingerprint scanner is, same size and location. but theirs also a small one far top left, don't know what that one is.

I had also spots on the display, I returned that unit and i got already a new replacement that doesn't have any issues.

Even my Mi A1 has spots, but it looks like it's a glass manufacturing issue, not the display

xdarkmario said:
call me crazy but i think they could be sensors. the one spot i have is exactly where the in screen fingerprint scanner is, same size and location. but theirs also a small one far top left, don't know what that one is.
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the top left one could be the under screen ambient light sensor as pictured in the linked image
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Here's the official "teardown" https://c.mi.com/thread-1856339-1-0.html

It's not any sensors or something like that, it's literally like dirty spots between the glass and the screen. i would guess it's the glue they use.

This is happening when is activated anti-fliker mode to my mi 9 lite.

Related

[Q] Purple hue in center of photos?

Ran a search on the forum just to make sure this hasn't been posted before, but I may have missed something... Excuse me if I did
When I'm in the camera app taking pictures/video, and am shooting some kind of dark fabric, there is a noticeable purple hue in the center of the display. Other shots (landscape, hardware shots) don't have the problem.
Below is a GIF image of my black trackpants and the burst image captured with my One.
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Notice how the purple hue is constantly moving, disappearing and reappearing?
The linked image isn't the best of quality, and the in-person shots have a more noticeable discoloration, but should this be anything I should worry about?
My Moto Atrix 4G had a very similar issue, but the problem later bled into everyday shots where everything had a blue discoloration in the dead center.
Anyone else have this "problem?" It's not bothering me too much, just don't want it to come back and haunt me in a few months.
Secondly, does anyone notice that the brightness changes when you use the camera app? If you start out with minimum brightness and use switch to the camera app, your brightness increases temporarily (assuming this is by design and not some kind of odd bug on my unit).

Secret status LED?

Something I found while flashing some firmware on my C6603. The purple dot in the image is some sort of LED that's visible to my Nexus 7 2013's camera, but invisible to my eyes, and I caught it flashing while TWRP was busy with something. I've never seen it outside of flashing .zips.
No idea what it's for, but maybe somebody here can work out what it's for and whether it does anything useful to us.
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dSayonarab said:
Something I found while flashing some firmware on my C6603. The purple dot in the image is some sort of LED that's visible to my Nexus 7 2013's camera, but invisible to my eyes, and I caught it flashing while TWRP was busy with something. I've never seen it outside of flashing .zips.
No idea what it's for, but maybe somebody here can work out what it's for and whether it does anything useful to us.
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Thats your proximity sensor. It's an infrared emitter and detector, invisible to the naked eye. When viewed through another camera it shows up as a light because a camera can see IR light.
Point your camera at the end of your TV remote and press a button on the remote. It will flash.

[Q] Display issue

Just got this phone today and notice an area where there is a reddish tint. It is a 2 inch horizontal band in the center of the display most noticeable on white backgrounds. Is this something that might go away after a break in period? Has anyone seen this before?
I am having a similar issue to the one you describe. Mine has a bit more of a pinkish hue, and it is at the bottom of 1-2 inches of the screen. Shows up more on white backgrounds. Trying to decide if I should get a replacement or not. It's very subtle, but I can definitely see it.
From another thread:
Coronado is dead said:
Well, now I don't know if I should get this replaced. Took a picture with it on an all white screen...
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EDIT: I will say, while I notice it on white webpages or in gmail when looking from top to bottom, that pic looks WAY worse than in person, lol.
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Sent from my XT1254 using XDA Free mobile app
I'm thinking about returning as well, but afraid that I'll get one that is worse.

Horizontal lines sometimes appear on screen

Hey all, I was trying to apply some double sided tape to the bottom of my screen because it was coming a bit loose, and stupidly used metal tweezers to do so. The display turned off for a split second, but turned back on so I thought I was good.
But then, I've noticed that when I turn on the display, horizontal lines sometimes appear. I don't have a 100% repo rate; I can get rid of it by turning the display off and on again (might take a few times though).
However, the right side of my display is always brighter than the left, making a king of ugly brightness gradient on my screen.
Any ideas on how I might be able to fix this without buying a new screen? Thank you!
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I should also mention that I had replaced my screen in the past, although it worked perfectly before.
Unfortunately I have to say this screen is most probably a goner. The panel on this device is more fragile than a potato chip!
I cracked mine when it fell on the carpet with cover and protecting glass on. they didnt break but the panel beneath did!
My best suggestion would be getting a new panel and asking a more professional guy to repair it.

Question Shadows on screen... bug ?

Hi there !
I have the Pixel 7 and i'm very happy with it.
I've noticed something weird yesterday :
When my phone is beneath full sun and when looking at a white front page, i see 3 sorts of shadows. 2 on the top right and 1 little in the middle. I see them only in full sun condition.
I wonder if it's a screen bug or if it's a material shadow under the screen (camera material reflexion ?...)
Thanx for your help.
this pic is not mine, but it's just to show you the shadows location
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It's the proximity sensor under the camera, and other sensors. We all have them. It's normal.
Thanx for your help ! Glad to read that. But its true that once i see those shadows, i always see them !
This is how it looks on my Pixel 7 which was delivered today (i had to exchange it due to some defect and didn't recognized it before with the previous device).
I was really shocked as i have seen that. That's where i started searching the web for this.
But is that really state of the art quality of such display panels? I just wonder if really each Pixel 7 has this.
It seems the display panel of the Pixel 6 at least does not have this big shadow which looks like a big battery symbol on the top right corner. This big shadow annoys me the most.

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