Display - Light bleed - Xiaomi Redmi 4X Questions & Answers

Hi
I just received my Redmi 4x. While I tried different wallpapers I noticed a slight green tint on the lower border of the display.
Further inspection showed a visible green coloration on the lower portion of the display. The brighter the display gets, the more visisble it becomes. I don't care about the slight light-bleed on the top or bottom left.
You can find some photos I took.
Code:
https://ibb.co/ku6hgb
https://ibb.co/fpuXEw
https://ibb.co/kuTsEw
https://ibb.co/nAezuw
Of course I don't watch black images at maximum brightness all day. This scenario was chosen for the purpose of illustrating the problem.
I wonder if the display of my Redmi 4x is an exception or the standard.
Thanks for your participation.

I have this problem also. I am using my 4x for 5 months already, and I always use adaptive brightness, but still I got back light bleeding

Related

Non-uniform intensity across screen at low-brightness settings?

Hi,
Has anyone notciced un-even brightness across the screen at low light levels (for darker colors)? I thought it was just the nature of these OLED screens, but I don't see this with Galaxy Phone with similar display type, so I'm wondering if I just have a defective unit with bad display.
To test it:
- Do this at night (when ambient light is fairly low).
- Lower brightness down to the lowest setting (turn off auto-brightness)
- Open Chrome browser, and close all tabs, so that you get a blank dark screen with just the "+" icon. This leaves a dark gray background, just enough to notice if there is any uneveness in brightness.
On my unit, I see about 3-4 inches of bands/streaks of darker areas at bottom half of the screen. If I rotate the tablet, the darker areas stay in their physical location (so these bands become vertical instead of horizontal), so I know it's not a software issue.
I have a couple of weeks left before I need to decide on whether to exchange the tab, so would appreciate if anyone can help me verify if this is normal thing with these screens.
Many thanks, Tony.
tonyc1 said:
Hi,
Has anyone notciced un-even brightness across the screen at low light levels (for darker colors)? I thought it was just the nature of these OLED screens, but I don't see this with Galaxy Phone with similar display type, so I'm wondering if I just have a defective unit with bad display.
To test it:
- Do this at night (when ambient light is fairly low).
- Lower brightness down to the lowest setting (turn off auto-brightness)
- Open Chrome browser, and close all tabs, so that you get a blank dark screen with just the "+" icon. This leaves a dark gray background, just enough to notice if there is any uneveness in brightness.
On my unit, I see about 3-4 inches of bands/streaks of darker areas at bottom half of the screen. If I rotate the tablet, the darker areas stay in their physical location (so these bands become vertical instead of horizontal), so I know it's not a software issue.
I have a couple of weeks left before I need to decide on whether to exchange the tab, so would appreciate if anyone can help me verify if this is normal thing with these screens.
Many thanks, Tony.
Click to expand...
Click to collapse
I have notice a similar thing, mostly on gray - dark gray backgrounds, and not necessarily at lowest brightness (low enough though). I wanted to check about it on a couple of devices on display at retail stores but it's hard to test there.
Sent from my SM-T815 using Tapatalk
Hi tonyc1,
Having had 4 of these I can confirm that this unevenness is normal on the 9.7" screen but was not present on the 8" model.
I went through 4 to get one that was reasonably even, 2 of them were pretty awful to the point that the greyscale was all over the place.
The unit I settled on has a slightly darker band in the middle of the screen and a slight darkening at the very top.
I owned the original tab s 10.5 and have to say the screen on that was more even and detailed, I prefer the former factor and speed of this S2 but the screen is a step backwards.
Hope this info helps.
Cheers
Thanks for the notes and confirming this is a somewhat common issue. I guess I will live with it for now..

LCD issues / artifact / burn-in / dark spots

Hey everyone. After having owned my Mi 5 for about 8 months, I started noticing some artifacts/dark spots on my screen. There are perfectly angular lines all around the screen, most prominent in the lower left corner (pictured in the close-up). Did anyone else ever get anything similar? Any ideas what could be wrong?
Picture was taken with a neutral 50% Background on 100% brightness. The dark spots are more obvious at lower screen brightnesses and darker colors.

OLED Display black to grey smearing

Hey,
i just got the Xiaomi mi8 (Global Rom, MIUI 9.6) and noticed a thing with the display. If the brightness is under 40% (lower the problem gets more and more visiable, gets really bad at 10-15%) the black is starting to smear if next to a grey color. If i move a black part surrounded by grey over the screen the black smears into the grey. I also noticed there is a slight color gradient from left (dark) to the right (getting brighter).
I contected the shop i bought it from and they said they never heard of this problem. I googled the problem but got no resaults. The shop send me a new Xiaomi mi8 but guess what, the same problem occured on this new device too.
I tried to record a video but its really hard if the room is dark and the screen is at a low brightness but maybe you can see what i mean at the edges of the black parts if you look closely.
mi 8 screen recorded with a camera:
https://www.dropbox.com/s/gmgdthzthgm69dr/Black smear xiaomi mi8.avi?dl=0
https://www.youtube.com/watch?v=LkmipTa_PsY
I made a test pattern and attached it to this post. Would be really helpful if somebody could check this on his/her own mi 8 and leave feedback!
test pattern recorded with screenrecorder on mi 8:
https://www.dropbox.com/s/1fpxuybw664skgp/Screenrecorder_mi8.mp4?dl=0
https://youtu.be/qM5FsRYTgKw
Greetings
It's Normal for all oled or amoled screen.
gm007 said:
It's Normal for all oled or amoled screen.
Click to expand...
Click to collapse
Really? Hmm, than i have to look for a device with a good old LCD panel.
Absolutely normal, my old s7 did this too, its due to the fact that pixels are turned off when displaying black and it might take a fraction of a second to turn on resulting in this smear. Happens to all oled displays

Dirty Screen. Defective?

My new Mi 8 seems to have a defective screen. The defect becomes visible when the screen brightness is very low. Is this normal on Mi 8? Or mine is just defective? I've noticed it yesterday night when using a blue light filter called Night Shift. It's visible specially on reddish background and a blue light filter makes the screen color to reddish. You should also try yours and see if it's defective. I specifically downloaded a black image for a better view and turned on Night Shift with Dark filter and lowered brightness at 1-5%
The point is, what is the point of using the phone at brightness 1-5%?

Question Faint White Lines with Grainy/Noise on Display

Hi,
Got a new Moto Edge 20 Pro a couple of weeks back.
The display at low brightness has very noticable Faint White Lines and the display looks grainy, like newspaper texture almost like the Kindle Display.
At darkness, when the display refresh rate is set to auto, I can see the grainy noise and the white lines change when I touch the display.
Grey and White colors arent Pure Grey and White. When I use pwmfree 1.3 or OLED SAVER app, the white lines are almost gone (not entirely gone) and the grainy texture / noise increases.
Any idea whats going on, whether it is a software or a hardware issue ?
is there a way to get this fixed ?
karikaalan0207 said:
Hi,
Got a new Moto Edge 20 Pro a couple of weeks back.
The display at low brightness has very noticable Faint White Lines and the display looks grainy, like newspaper texture almost like the Kindle Display.
At darkness, when the display refresh rate is set to auto, I can see the grainy noise and the white lines change when I touch the display.
Grey and White colors arent Pure Grey and White. When I use pwmfree 1.3 or OLED SAVER app, the white lines are almost gone (not entirely gone) and the grainy texture / noise increases.
Any idea whats going on, whether it is a software or a hardware issue ?
is there a way to get this fixed ?
Click to expand...
Click to collapse
The noise on the display is the nature of OLED displays. Or at least the one on this phone. I have a regular Edge 20, but they have the same display anyway. Same issue you pointed out: grain with certain colors and at lower brightness. And yes, I do get some vertical lines at the bottom of the screen. It's not defect, it's just the way it is.
Username: Required said:
The noise on the display is the nature of OLED displays. Or at least the one on this phone. I have a regular Edge 20, but they have the same display anyway. Same issue you pointed out: grain with certain colors and at lower brightness. And yes, I do get some vertical lines at the bottom of the screen. It's not defect, it's just the way it is.
Click to expand...
Click to collapse
I had an iPhone12 before this and that too had an OLED Panel, and I wasnt able to see anything like this.
And the Noise is not consistent. It's pretty freaking uneven and Its a total mess. To see the Noise completely, just open a 2% grey image or something and observe it. It's pretty abysmal. No way OLED displays are this bad.
I just think that Moto has crapped on its customers with a defective batch of Displays.
Also the situation gets better when you use pwmfree app.
The panel's gray uniformity is pretty bad. Im suspecting if this is a case of banding/dirty screen effect on oled screens, which is a defect and not a norm for an OLED Displays.
karikaalan0207 said:
I had an iPhone12 before this and that too had an OLED Panel, and I wasnt able to see anything like this.
And the Noise is not consistent. It's pretty freaking uneven and Its a total mess. To see the Noise completely, just open a 2% grey image or something and observe it. It's pretty abysmal. No way OLED displays are this bad.
I just think that Moto has crapped on its customers with a defective batch of Displays.
Also the situation gets better when you use pwmfree app.
The panel's gray uniformity is pretty bad. Im suspecting if this is a case of banding/dirty screen effect on oled screens, which is a defect and not a norm for an OLED Displays.
Click to expand...
Click to collapse
Ah, well, I haven't owned any expensive phones so I can't really compare to anything other than the Moto Z2 Play, which also had a grainy OLED panel. If I were you I'd be annoyed as well, but I payed a fraction of MSRP for my phone so I can't complain.
karikaalan0207 said:
I had an iPhone12 before this and that too had an OLED Panel, and I wasnt able to see anything like this.
And the Noise is not consistent. It's pretty freaking uneven and Its a total mess. To see the Noise completely, just open a 2% grey image or something and observe it. It's pretty abysmal. No way OLED displays are this bad.
I just think that Moto has crapped on its customers with a defective batch of Displays.
Also the situation gets better when you use pwmfree app.
The panel's gray uniformity is pretty bad. Im suspecting if this is a case of banding/dirty screen effect on oled screens, which is a defect and not a norm for an OLED Displays.
Click to expand...
Click to collapse
I have noticed a weird behavior with the display. forcing it to 60Hz by enabling power saving mode significantly reduces the grain and make the panel a lot more uniform.

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