Database Develop

[Q] Dark spots on the screen when displaying a black image

I bought a Samsung Galaxy Note (N7000) phone about one week ago. I noticed a problem with the screen. The problem is like this:
When I am in a very dark room (and make sure my eyes have adapted to the darkness), and display a completely black image with the phone, the screen is not completely black. This is NOT the problem I want to say. The problem which bothers me is that, inside this gray screen I can notice some really black spots, just like the screen has been spattered by some black ink (but is has not).
Why is this a problem? Because even if the screen cannot be perfectly black when displaying a completely black image, it should still be uniform; but this is not the case!
This problem is similar to the one described in this web page:
http://forum.xda-developers.com/showthread.php?t=1150171
Maybe I should add that this problem never affect its performance in normal conditions. It only shows up when the environment is completely dark and when it display something really black.
So I would like to know whether this problem is caused by a defect of the phone.
A photo is attached. It was taken with a long exposure time. The photo is taken with a small Canon camera, with ISO = 200, and an exposure time of 15 seconds.

This thread has some discussion regarding the issue. I have these marks on my SGS2 screen as well; bit of a nuisance really.
http://forum.xda-developers.com/showthread.php?t=1335423

Why is this a problem? Because even if the screen cannot be perfectly black when displaying a completely black image, it should still be uniform; but this is not the case!
.
Click to expand...
Click to collapse
Mine is pitch black as far as i can tell. However, when i run screenfilter, it dims the colors but the background (normally black) becomes a light grey.

ChodTheWacko said:
Mine is pitch black as far as i can tell. However, when i run screenfilter, it dims the colors but the background (normally black) becomes a light grey.
Click to expand...
Click to collapse
Thanks for you information!
Did you look at the screen (when displaying a black image) in a very dark room?

fjdu said:
I bought a Samsung Galaxy Note (N7000) phone about one week ago. I noticed a problem with the screen. The problem is like this:
When I am in a very dark room (and make sure my eyes have adapted to the darkness), and display a completely black image with the phone, the screen is not completely black. This is NOT the problem I want to say. The problem which bothers me is that, inside this gray screen I can notice some really black spots, just like the screen has been spattered by some black ink (but is has not).
Why is this a problem? Because even if the screen cannot be perfectly black when displaying a completely black image, it should still be uniform; but this is not the case!
This problem is similar to the one described in this web page:
http://forum.xda-developers.com/showthread.php?t=1150171
Maybe I should add that this problem never affect its performance in normal conditions. It only shows up when the environment is completely dark and when it display something really black.
So I would like to know whether this problem is caused by a defect of the phone.
A photo is attached. It was taken with a long exposure time. The photo is taken with a small Canon camera, with ISO = 200, and an exposure time of 15 seconds.
Click to expand...
Click to collapse
m facing the same problem! there r black spots on the screen n i get red and green patches on the screen when m watching videos in dim light but it dissapears wen the surrounding is bright! is it only me or anyone else facing these problems!
---------- Post added at 07:44 PM ---------- Previous post was at 07:38 PM ----------
even my photos have these patches when taken in the dark! someone plz help!

dabeet satyanarayan said:
m facing the same problem! there r black spots on the screen n i get red and green patches on the screen when m watching videos in dim light but it dissapears wen the surrounding is bright! is it only me or anyone else facing these problems!
---------- Post added at 07:44 PM ---------- Previous post was at 07:38 PM ----------
even my photos have these patches when taken in the dark! someone plz help!
Click to expand...
Click to collapse
All OLEDs can have this issue. I would imagine more have it than not. My old Zune HD did this. My note has it, my Infuse has it. If you are into watching black screens with nothing on them in pitch black rooms, then stay away from OLED screens. Since you really can't see this with normal use, I would say it is no big deal.
Your video issue is something else all together. That is just a boneheaded gamma setting by Samsung. Shades below 4 (with my gamma test image) aren't smoothly ramped down, they are just eliminated entirely! This gives a noticeable step from shadow details to black, which shows compression tiling that you normally wouldn't see..

I believe physical damage causes this problem..because last week when my girlfriend tossed Me my deo can it accidentally hit the screen and since then there's a huge black spot in that area thankfully though it's only visible on a pitch black image ....like the bootscreen
so no issues

This belong in Q&A

My very first Note had blotches visible even in daylight on a gray background. I had it replaced the next day under Samsung early life failure policy (first 30 days). Second phone had blotches visible only on a black background in a dark room. So did 3rd, 4th and 5th! However, the 5th Note had blotches around the edges unlike the other 4 Notes so I decided to keep it. The fact is: ALL Notes 1 have blotches. If you can't see blotches consider yourself blessed. Blotches are the only thing I hate about Note 1.
Sent from my GT-N7000 using xda premium

even though a lot of screens have this, Id send it back if I was you. I think its unacceptable for aproduct this expensive. It shoukd be flawless. So quickly call upon warrantee.
Next time, dont leave the store without doing an instore test, that way you can return it immediately with no questions asked

baz77 said:
even though a lot of screens have this, Id send it back if I was you.....
Next time, dont leave the store without doing an instore test, that way you can return it immediately with no questions asked
Click to expand...
Click to collapse
It's a bit hard to do a "dark room" test in store. After the 5th I gave up my search for a perfect screen. Until Samsung changes their AMOLED manufacturing process and improve QC there won't be "perfect" screens.
Sent from my GT-N7000 using xda premium

The problem is these dark spots won't appear even on the standard *#0*# screen test .
so it's kind of a non issue but what I am worried about it is, will it deteriorate in time and become an issue later on ?
Sent from my GT-N7000 using xda app-developers app

itsrijo said:
The problem is these dark spots won't appear even on the standard *#0*# screen test .
so it's kind of a non issue but what I am worried about it is, will it deteriorate in time and become an issue later on ?
Sent from my GT-N7000 using xda app-developers app
Click to expand...
Click to collapse
It's nothing to worry about

same case
dabeet satyanarayan said:
m facing the same problem! There r black spots on the screen n i get red and green patches on the screen when m watching videos in dim light but it dissapears wen the surrounding is bright! Is it only me or anyone else facing these problems!
---------- post added at 07:44 pm ---------- previous post was at 07:38 pm ----------
even my photos have these patches when taken in the dark! Someone plz help!
Click to expand...
Click to collapse
i got the same problem ..my note 2 is at&t and when i use my phone in a dark room it shows the same black patches ...like if i open camera it does not show a complete back screen but spots over it ..plz help me to resolve it ! Is that a lcd issue ?
---------- Post added at 08:54 PM ---------- Previous post was at 08:47 PM ----------
shafaq said:
i got the same problem ..my note 2 is at&t and when i use my phone in a dark room it shows the same black patches ...like if i open camera it does not show a complete back screen but spots over it ..plz help me to resolve it ! Is that a lcd issue ?
Click to expand...
Click to collapse
oH AND I JUST SAW THE ATTCHEMENT ..MINE ARE EVEN WORSE ! THEY ARE LIKE BOXES STARTING FROM THE EDGES AND SO ON

Help me
Half my screen of my galaxy note 2 is dark and grey
Someone help
I don't know what happened to it and it seems like it might be spreading too
If anyone has a solution please post
Thankyou

Camera Issue

hi guys.i just purchased the xperia z1.when checking out the camera at night i saw these red tint along the sides when there is no light.Is this a defect??

Dunno , but it surely does looks like it. Take it back for a replacement.
Sent from my HTC One X using xda app-developers app

mhoss48 said:
Dunno , but it surely does looks like it. Take it back for a replacement.
Sent from my HTC One X using xda app-developers app
Click to expand...
Click to collapse
strangely the picture taken dosnt have the red tint..

subextreme007 said:
hi guys.i just purchased the xperia z1.when checking out the camera at night i saw these red tint along the sides when there is no light.Is this a defect??
Click to expand...
Click to collapse
Come on! No! Do not cover the camera lens, take the phone in you hands and all will disappear. They are pixels processed by the camera with no light.

eclyptos said:
Come on! No! Do not cover the camera lens, take the phone in you hands and all will disappear. They are pixels processed by the camera with no light.
Click to expand...
Click to collapse
So i tested again with only my laptop backlight as the light source..this is the liveview..the tint is not in the picture though

subextreme007 said:
So i tested again with only my laptop backlight as the light source..this is the liveview..the tint is not in the picture though
Click to expand...
Click to collapse
Ok. I got tiny ble and red pixels too when the camera is in low light. But not like on your phone. Try to set up the setting on you phone to the best quality you can. Take a picture in Low and High light. If on the pictures there are not visible pixels that means is the preview the problem of you camera. If is the preview you can live with that, it's your choice. If not go for a replacement and explain the problem, but I don't know if the warranty cover that.

eclyptos said:
Ok. I got tiny ble and red pixels too when the camera is in low light. But not like on your phone. Try to set up the setting on you phone to the best quality you can. Take a picture in Low and High light. If on the pictures there are not visible pixels that means is the preview the problem of you camera. If is the preview you can live with that, it's your choice. If not go for a replacement and explain the problem, but I don't know if the warranty cover that.
Click to expand...
Click to collapse
Tested in manual mode..interestingly no tint ..tint is only in the superior auto mode.

subextreme007 said:
Tested in manual mode..interestingly no tint ..tint is only in the superior auto mode.
Click to expand...
Click to collapse
So was the settings, I am happy for you. I will not like to leave the preview like that either.

eclyptos said:
So was the settings, I am happy for you. I will not like to leave the preview like that either.
Click to expand...
Click to collapse
but took some shots in manual mode in low light there are some tiny white dots in some region of the picture.

subextreme007 said:
but took some shots in manual mode in low light there are some tiny white dots in some region of the picture.
Click to expand...
Click to collapse
Post some pic.

if u zoom in the pic on the upper part u can see some white spots...

eclyptos said:
Post some pic.
Click to expand...
Click to collapse
If u zoom in on upper part of the pic or the right part u could see the white dots..

subextreme007 said:
if u zoom in the pic on the upper part u can see some white spots...
Click to expand...
Click to collapse
The picture is too dark, can be even a reflection like the small red point in the middle but if you are refer about the tiny white pixel, in this case is a faulty pixel. But I think is just a coincidance.
Any picture which you take have in the same position the white pixel? Maybe you go just crazy!

eclyptos said:
The picture is too dark, can be even a reflection like the small red point in the middle but if you are refer about the tiny white pixel, in this case is a faulty pixel. But I think is just a coincidance.
Any picture which you take have in the same position the white pixel? Maybe you go just crazy!
Click to expand...
Click to collapse
took this one with superior auto mode..pls look at the top left ...image seems to be distorted..is this a defect lens?

subextreme007 said:
took this one with superior auto mode..pls look at the top left ...image seems to be distorted..is this a defect lens?
Click to expand...
Click to collapse
Yes it is a bit. The lens are clean? The leans are dirty in some way?
Also you have to take in consideration the poor quality of the picture because the low light make the picture more distorted. Is very hard for the camera to processing that king of pictures. You will never take this picture as a good picture so I will delete it. You try the perfection and is ok, I did this too. Try to take a nice clean normal light pictures, if they are good and no preview problem (solved) and no strange distortion you are fine. If there is any problem with the lcd pixels or with the lens you should have the problem all the time in the same place. So I think is not your case. Everything is ok..

eclyptos said:
Yes it is a bit. The lens are clean? The leans are dirty in some way?
Also you have to take in consideration the poor quality of the picture because the low light make the picture more distorted. Is very hard for the camera to processing that king of pictures. You will never take this picture as a good picture so I will delete it. You try the perfection and is ok, I did this too. Try to take a nice clean normal light pictures, if they are good and no preview problem (solved) and no strange distortion you are fine. If there is any problem with the lcd pixels or with the lens you should have the problem all the time in the same place. So I think is not your case. Everything is ok..
Click to expand...
Click to collapse
hey thanx for ur valuable time..need to test it again in good light hope it produce good pictures...

subextreme007 said:
hi guys.i just purchased the xperia z1.when checking out the camera at night i saw these red tint along the sides when there is no light.Is this a defect??
Click to expand...
Click to collapse
No that is the phone trying to display something in the dark, the red bleed is any little bit of light coming into the lens. The scene is just too dark for the phone to render on the screen.
---------- Post added at 07:30 AM ---------- Previous post was at 07:29 AM ----------
subextreme007 said:
strangely the picture taken dosnt have the red tint..
Click to expand...
Click to collapse
No it's not strange, it's normal
---------- Post added at 07:34 AM ---------- Previous post was at 07:30 AM ----------
subextreme007 said:
So i tested again with only my laptop backlight as the light source..this is the liveview..the tint is not in the picture though
Click to expand...
Click to collapse
Seriously dude, with almost no light for the camera to render something on the display you are lucky you can even see anything. Liveview will only show you what it can based on real time processing, so in low light will most likely look much darker, in that light the shutter is probably going to to about 1 second, therefore the phone can't liveliew that because it will piss you off every time you move the camera waiting 1 second for the picture to refresh
---------- Post added at 07:35 AM ---------- Previous post was at 07:34 AM ----------
subextreme007 said:
but took some shots in manual mode in low light there are some tiny white dots in some region of the picture.
Click to expand...
Click to collapse
It's called ISO noise and noise reduction

danw_oz said:
It's called ISO noise and noise reduction
Click to expand...
Click to collapse
Right, I forgot is called ISO, speaking technically. .

danw_oz said:
No that is the phone trying to display something in the dark, the red bleed is any little bit of light coming into the lens. The scene is just too dark for the phone to render on the screen.
---------- Post added at 07:30 AM ---------- Previous post was at 07:29 AM ----------
No it's not strange, it's normal
---------- Post added at 07:34 AM ---------- Previous post was at 07:30 AM ----------
Seriously dude, with almost no light for the camera to render something on the display you are lucky you can even see anything. Liveview will only show you what it can based on real time processing, so in low light will most likely look much darker, in that light the shutter is probably going to to about 1 second, therefore the phone can't liveliew that because it will piss you off every time you move the camera waiting 1 second for the picture to refresh
---------- Post added at 07:35 AM ---------- Previous post was at 07:34 AM ----------
It's called ISO noise and noise reduction
Click to expand...
Click to collapse
so is it common that u will get red tint when der is no light??and there is considerable amount of noise in the pics in daylight too.. ....my galaxy s,lumia 800 doesnt have these issues...

subextreme007 said:
so is it common that u will get red tint when der is no light??and there is considerable amount of noise in the pics in daylight too.. ....my galaxy s,lumia 800 doesnt have these issues...
Click to expand...
Click to collapse
Yep because it is too dark to show the colours correctly, it is hard for the camera to display, the red pixels is light sneaking past into the lens. Other cameras display the image as a higher iso preview so allow more light in, but change when taking the shot, not sure why Sony don't increase the this. BTW all my point and shoots and even my DSLRs in liveview have this problem in low light, unless I change the ISO high.
Maybe root your phone and download monxdified ROM, it has some camera tweaks. Try not to use superior auto, and use manual mode for best results, that way you can control many different settings.

Clarity/resolution

The LG V10 has a crazy crisp display. Just kidding, this is automated text so who knows if this screen is any good. So, you be the judge! A higher rating indicates that it's extremely sharp and clear, and that you cannot see pixels with your naked eye.
Then, drop a comment if you have anything to add!

I dont know if you guys and gals with good eyes notice.. But I suggest anyone looking at an LG G4 or v10 to look at and read the screens with reading glasses on.. The IPS screen clarity is unrivaled.
For my eyes, the ever so slight increase in size to the G4 makes the screen easier to read.

as if...
all pictures and facebokf posts with images or videos are very poor quality. they are all distorted and very fuzzy.. I think I'm switching to another phone.

a_ghost said:
all pictures and facebokf posts with images or videos are very poor quality. they are all distorted and very fuzzy.. I think I'm switching to another phone.
Click to expand...
Click to collapse
I think the display has excellent clarity and with 560 DPI you would be hard pressed to see imperfections. Could it be something wrong with your software configuration as hardware problems would be evident all the time ?

.
slomo2 said:
I think the display has excellent clarity and with 560 DPI you would be hard pressed to see imperfections. Could it be something wrong with your software configuration as hardware problems would be evident all the time ?
Click to expand...
Click to collapse
well not sure since I just got this phone Saturday and have not messed with anything. How can I know?

That is software problem. If it was hardware it would affect everything
Sent from my LG-H815 using Tapatalk

I'm really enjoying the clarity of the resolution, but in the last few days I've started to notice something strange. Had the V10 for almost a month now. I've noticed that every now and then, when I hit the power button while looking at the screen, it looks like an old 3D effect (seen without the glasses), around all writing and icons. It looks like red & blue outlines, sort of 1/2 & 1/2, and only for a millisecond or so. Anyone else seeing bad 80's 3D?

a_ghost said:
all pictures and facebokf posts with images or videos are very poor quality. they are all distorted and very fuzzy.. I think I'm switching to another phone.
Click to expand...
Click to collapse
Check Chrome's Settings ?
http://www.fastcompany.com/3054102/...VuOlVT&usg=AFQjCNFdL98YsU_5KQLTqajbMSe6sZV4pw
sent with Hugz from my new fully stock, non-rooted VZW LG V10 VS990 which an old faithful still working Rezound helped me to afford to get
---------- Post added at 02:45 AM ---------- Previous post was at 02:32 AM ----------
wighty45 said:
I'm really enjoying the clarity of the resolution, but in the last few days I've started to notice something strange. Had the V10 for almost a month now. I've noticed that every now and then, when I hit the power button while looking at the screen, it looks like an old 3D effect (seen without the glasses), around all writing and icons. It looks like red & blue outlines, sort of 1/2 & 1/2, and only for a millisecond or so. Anyone else seeing bad 80's 3D?
Click to expand...
Click to collapse
It's hard to understand what you are seeing.
It could be the Lock Screen's Swipe Effect or maybe the Blurred background view that happens when the phone is On and the Power button is held down to view the Shut down choices.
Check those to see if they are causes
sent with Hugz from my new fully stock, non-rooted VZW LG V10 VS990 which an old faithful still working Rezound helped me to afford to get

Very good to me.
I do wear glasses for close up, yet don't need them with this phone.

Huawei P20 pro Secondary rate amoled screen??!!

https://youtu.be/XIMLoLxmTDw
Hello everyone.. I'm sorry for bad English but try to understand it's important..
I think that Huawei cheated us with p20 pro..
We paid 890 euros for one of the best mobiles in the market and Huawei used second rate display of amoled.. And please tell me did you paid 890 euros for second rate display? I don't think so..
So follow the instructions and you will see what I mean.
Go on a completely dark room, without light at all..
Use brightness 100%
Click the video and turn your phone to watch it on full screen..
W8 for the a little bit and you will see white colours coming out from your screen and tell me..
Is that normal for amoled panel?
No its not.. Black should be completely black...
I took my phone to Huawei fix center and they refuse to see.. They don't recognize it as problem and they refuse to give me my money back..
What do you say?? Check the same with s9 and s9+.
P20 pro user.

no such problem on my device.

You mean you have some dead pixels?

jh787 said:
You mean you have some dead pixels?
Click to expand...
Click to collapse
No dead pixels, no white lines, just a properly working Amoled screen.

Had major light leak from the bottom of the screen it could only see it on a black background in low light

scook94 said:
no such problem on my device.
Click to expand...
Click to collapse
Look better with more dark. All device has the same.
Black is only black not even a peace of white noise

Neo_Sk8eR said:
Had major light leak from the bottom of the screen it could only see it on a black background in low light
Click to expand...
Click to collapse
I said use the video on full screen on a dark area and just WI to see.

scook94 said:
No dead pixels, no white lines, just a properly working Amoled screen.
Click to expand...
Click to collapse
I have already check it one a 3 different devices. One from germany/ England and greek

Noexcusses said:
I have already check it one a 3 different devices. One from germany/ England and greek
Click to expand...
Click to collapse
Not sure what you're trying to say.

scook94 said:
Not sure what you're trying to say.
Click to expand...
Click to collapse
You will see white noise around of the screen and in. The. Middle of it..
That's is not 100% amoled screen. Do the same check with s9 and s9+

Noexcusses said:
You will see white noise around of the screen and in. The. Middle of it..
That's is not 100% amoled screen. Do the same check with s9 and s9+
Click to expand...
Click to collapse
I have no white noise. Not sure what more I can say, I do NOT have the problem you are describing, end of.

No problems on mine either. The screen is pitch black on that YouTube video

No problem on mine.
Also, why on earth are you paying €890 if you just received it? They're available for at or below €700 now.

mudnightoil said:
No problem on mine.
Also, why on earth are you paying €890 if you just received it? They're available for at or below €700 now.
Click to expand...
Click to collapse
Did I say that I just received it?
I bought it when it came out on the market.

JadranB said:
No problems on mine either. The screen is pitch black on that YouTube video
Click to expand...
Click to collapse
I forgot to mension that you need to have 100% brightness on screen

Noexcusses said:
Did I say that I just received it?
I bought it when it came out on the market.
Click to expand...
Click to collapse
I forgot to say that you should have 100 % brightness

scook94 said:
I have no white noise. Not sure what more I can say, I do NOT have the problem you are describing, end of.
Click to expand...
Click to collapse
I forgot to say that you should have 100 % brightness...

JadranB said:
No problems on mine either. The screen is pitch black on that YouTube video
Click to expand...
Click to collapse
Try again an use 100% brightness

I can see what you mean. I can see it even on low brightness. I have never done this test before, so cannot comment on other oleds I've owned.
Could it be compression? I say this because after seeing the effect in this video. I tested others, and i found that the severity of the effect is lesser. Also the uniformity changed between videos, whilst staying consistant to each.
Your video was much more pronounced than some others, this makes believe that there is something else in the works.
I know when i use a pure black wallpaper, the screen is perfect black. Also im pretty sure the AOD has pure blacks too

Sc00p007 said:
I can see what you mean. I can see it even on low brightness. I have never done this test before, so cannot comment on other oleds I've owned.
Could it be compression? I say this because after seeing the effect in this video. I tested others, and i found that the severity of the effect is lesser. Also the uniformity changed between videos, whilst staying consistant to each.
Your video was much more pronounced than some others, this makes believe that there is something else in the works.
I know when i use a pure black wallpaper, the screen is perfect black. Also im pretty sure the AOD has pure blacks too
Click to expand...
Click to collapse
It doesn't work on wall papers..
On Video is easier to see

s10e screen problem?

Hello, I have a few days with my s10e but today I notice something strange thanks to xda labs app, scrolling threads on some picture profile was black so was a black circle and when I scrolling in that part the black circle, it's hard to explain with words but when the black circle moves it just moves and left a black trace like a shadow and disappear slowly until I stop scrolling, only with black objects do that, is it normal or its a faulty screen?

Perfectly normal for oled

ALUCARD4DEAD said:
Hello, I have a few days with my s10e but today I notice something strange thanks to xda labs app, scrolling threads on some picture profile was black so was a black circle and when I scrolling in that part the black circle, it's hard to explain with words but when the black circle moves it just moves and left a black trace like a shadow and disappear slowly until I stop scrolling, only with black objects do that, is it normal or its a faulty screen?
Click to expand...
Click to collapse
You mean screen ghosting? Well normal in oled after 1 or more yr but if it's new then exchange it!!

vishal uchiha said:
You mean screen ghosting? Well normal in oled after 1 or more yr but if it's new then exchange it!!
Click to expand...
Click to collapse
That's not true, all AMOLED screens do this new or old, some less than others but if your screen is dim and you scroll with black on the screen slowly you'll see ghosting

Thanks everyone, I was thinking was a hardware related and to exchange it right away but need proof first

Colour changing
While increasing brightness slowly i mean really slowly i can see display colors changing like normal then purple again normal again purple do it slowly guys please let me know thanx.

Anger Of Wave said:
While increasing brightness slowly i mean really slowly i can see display colors changing like normal then purple again normal again purple do it slowly guys please let me know thanx.
Click to expand...
Click to collapse
Not here... i can see the screen became a little bit purple only if i tilt the screen more than 40 degrees

renton82 said:
Not here... i can see the screen became a little bit purple only if i tilt the screen more than 40 degrees
Click to expand...
Click to collapse
You have to do it slowly and steadily it can be seen clearly on white picture,background or a wallpaper. Try doing it agajn at night time turn off your lights around you and check it broda letme know.

Shuthefrontdoor said:
That's not true, all AMOLED screens do this new or old, some less than others but if your screen is dim and you scroll with black on the screen slowly you'll see ghosting
Click to expand...
Click to collapse
Yes you are right , having it on my new a50s .. samoled