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2 Nexus Ones Side by Side: Significant Difference in Screens!

I found a dead pixel in my first nexus one so I decided to swap it. The new one arrived today and I played with them side by side. The screens are very clearly different between the two. With everything set up identical and the same brightness setting, the one with the dead pixel is very clearly washed out looking with a greenish bluish tint to it. I actually noticed this somewhat before receiving the swap but thought it might be my imagination (the screen didn't seem as clear as my previous t-mobile version.) However, with them next to each other the difference was night and day.
I tried to get a good pic of it, but my photography skills are lacking and this is the best I could get. In person the one on the left (new one) is way better looking. The one on the right (sending back for dead pixel) has nowhere near the contrast and feels washed out, greenish, and unsharp.
So to conclude, if you think your screen might not be as as good as it should be, you may be right. I can't help but wonder if the dead pixel was just a symptom of a larger problem with the screen; perhaps the significantly reduced battery life I experience (compared to the t-mobile version I originally had) is also related to a screen issue. Time will tell...
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Update: Here's a better pic. Especially note the green tint and washed out look at the top right where the time is displayed. Look back and forth between them. I edited the color slightly so that what you see more closely resembles what I see. In person the brightness appears the same for both even though the right one looks brighter in the pic.

I agree that the dead pixel could of been part of a bigger problem, but the way the picture came out it appears as if the one on the right is alot sharper.
You should try turning the brightness down on the phones before taking the picture. Also did you lose a flash, or is this effect just from it being at 100%brightness?

I know it looks that way, but it's just a crappy pic. I'll try again later today before I send the phone back. I didn't use flash, and screen brightness had no effect on the difference between the phones.

I actually prefer the the one on the right. The one on the left looks way too reddish/pink. Have you done a side-by-side comparison on the lowest brightness setting and going to a white screen page like Google?

the one on the right kind of looks like the color on a droid screen

The one on the right is far more color accurate. The one on the left looks like my T-mo launch N1, which has blown out reds and makes everyone's faces red in pictures that I take until I move them to a PC with a proper screen.
Color accuracy should be preferred over "pop" and "vibrance", IMO

bradsh1 said:
The one on the right is far more color accurate. The one on the left looks like my T-mo launch N1, which has blown out reds and makes everyone's faces red in pictures that I take until I move them to a PC with a proper screen.
Color accuracy should be preferred over "pop" and "vibrance", IMO
Click to expand...
Click to collapse
Agreed, I wonder if HTC received a delivery of defective AMOLEDs from Samsung and just decided to use them rather than return them...

I had a similar issue. My old Tmobile N1 had a the blueish tint (like the picture on the right) but I had a dead pixel.
My new Tmobile N1 has the purple tint (like pic on left) and has no dead pixels yet. I've had them equal amount of time now.
I wonder if perhaps the old screens were having dead pixel issues and HTC decided to go with some different screens?

It could also just be the backlighting. The LED that's being used probably just emits at a higher temperature, eg more bluish-white.

erikikaz said:
It could also just be the backlighting. The LED that's being used probably just emits at a higher temperature, eg more bluish-white.
Click to expand...
Click to collapse
With AMOLED there is no backlighting. Each pixel is its own LED, red green and blue ones, emitting its own light.

I've taken more pics at different light levels. Here's one with the brightness set all the way down. I edited the colors slightly so that what you see more closely resembles what I see in person. The left one does not have a purple or red tint; its colors are correct. The right one definitely has a green tint and is washed out looking. Also, in person the brightness of the two appears the same even though my camera picked up the green tint of the right one making it appear brighter in the photo.
Look at the top right where the clock is displayed to really notice the green tint and washed out look. Look back and forth quickly at the time...

My phone had the same effect of the left one, that is when I first got it. Over time, it starter to slowly lose that red/purple like tint, and the colors became more sharp and correct.

i think amoled screens are somewhat of an organism

I just got my replacement phone from HTC due to dust under the screen on my original N1 (purchased second day of release).
I noticed that the newer phone had quite a few differences, including the quality of the screen. See my post about my observations here: http://forum.xda-developers.com/showthread.php?t=655966

INTERESTINg..How much more battery life did you get with the new one?

Anyone worried about stuck pixels?

Hallo,
I'm coming from an HTC One, of which I had 5 as every single one had stuck pixels. As minute as they are in a screen this sharp, they still make a device feel 'tainted' out of the box and I couldn't put up with them. I have much more faith in Samsung, but can't help but feel a little apprehensive that my bad luck will continue!
Now, I have seen conflicting reports about whether AMOLED can get stuck pixels or not, or whether it is just dead pixels that can occur. Can anyone shed some light on this for me?
Also, I had a SGS3 but never noticed any display flaws at all. Has anyone had any issues with Galaxy products in the past?

As I know, AMOLED it's not LCD, there is no backlight and the composition is organic. LCD use more energy, doesn't have black background and have problem with the pixels just like every LCD tv. AMOLED screens are different construction, so there would be no dead pixels. However, you can have black spots with black screen in darker rooms (I know sounds awful, but yes...most amoled have this issue but can't be seen in normal conditions) and the pixels can burn and lose intensity (never happened to my phones). So, amoled is much safer than lcd and the colors are more natural

^What has Exynos got to do with anything? :/
Well, I haven't had the dead/stuck pixel issue with the Note II, which I had with every single LCD phones to varying degrees. And seems like AMOLEDs tend to suffer from this a bit less too, relatively speaking. But AMOLEDs are not immune from stuck/dead pixels. And I'm not sure about this, but I'm thinking stuck/dead pixel would not be as visible in AMOLED.
But you should already be aware of the black blotches that you'll see on screen - that's pretty much standard with all AMOLED screens. Not a big issue, you wouldn't even notice it unless you crank up your brightness on a pitch black background in a dark room. For me that's a fair trade off for the superior quality and battery life that AMOLED offers.

Wasn't aware of the blotches, thanks for that. Just had a google and considering I never noticed it at all on my S3 can't see it being a prob. I have seen people claim that it is "mechanically" (or some similar word) impossible for an AMOLED pixel to get stuck, was just interested if anyone knew the details of such a claim if it is true.
Either way, judging how happy I was with the S3 screen I cannot see there being any problem on this one.

Sorry, corrected....I mean Amoled, not Exynos.

mattlovell90 said:
Hallo,
I'm coming from an HTC One, of which I had 5 as every single one had stuck pixels. As minute as they are in a screen this sharp, they still make a device feel 'tainted' out of the box and I couldn't put up with them. I have much more faith in Samsung, but can't help but feel a little apprehensive that my bad luck will continue!
Now, I have seen conflicting reports about whether AMOLED can get stuck pixels or not, or whether it is just dead pixels that can occur. Can anyone shed some light on this for me?
Also, I had a SGS3 but never noticed any display flaws at all. Has anyone had any issues with Galaxy products in the past?
Click to expand...
Click to collapse
LCD uses two transparent panels with liquid crystals between them. When light is flashed, the lens twist to allow the light to be pass/blocked to produce different colours. When this doesn't work like being clogged/stuck or something then you get a stuck pixel, but it's possible to make it better or fix by using pixel apps that flash light on the screen to make it refresh.
AMOLED is OLED pixels that each generate its own light. No moving parts. It is possible to get a stuck pixel but less prone than LCD. But if you do get a stuck pixel displaying wrong colour, it's pretty much defective I think.

OK.
So I just got my s4 from tmoblie and it almost seems I have a stuck blue pixel. I noticed it when I first plugged it in to charge it up before using. On the charging screen I can see a clear blue dot where there shouldn't be one. I can also see it briefly when my screen goes to sleep and I hit the home button to turn it on. I ran through some color screens but it doesn't seem to show up. Not sure if this is just some OS / device issue, or if its an actual defect of the screen.
Anyone ever run into something like that?

Sounds like a stuck pixel to me if it's blue.
https://play.google.com/store/apps/details?id=com.htc.chris.blackspotdetect&hl=en
Try this and see if you can see it to confirm.

WhiskeyHero said:
OK.
So I just got my s4 from tmoblie and it almost seems I have a stuck blue pixel. I noticed it when I first plugged it in to charge it up before using. On the charging screen I can see a clear blue dot where there shouldn't be one. I can also see it briefly when my screen goes to sleep and I hit the home button to turn it on. I ran through some color screens but it doesn't seem to show up. Not sure if this is just some OS / device issue, or if its an actual defect of the screen.
Anyone ever run into something like that?
Click to expand...
Click to collapse
Same here - just got my s4 from t-mobile, except my stuck pixel is red. Can only see it when screen is on, but black (on boot up or phone wake). Using the detectors from the market help to show it (if I set the screen to all black). Doesn't show up in a screenshot, so definitely hardware. Debating whether it's worth it to return for the one stuck pixel that I can't see most of the time. From what I've read, on AMOLED screens, it won't just go away eventually.

boardwak said:
Same here - just got my s4 from t-mobile, except my stuck pixel is red. Can only see it when screen is on, but black (on boot up or phone wake). Using the detectors from the market help to show it (if I set the screen to all black). Doesn't show up in a screenshot, so definitely hardware. Debating whether it's worth it to return for the one stuck pixel that I can't see most of the time. From what I've read, on AMOLED screens, it won't just go away eventually.
Click to expand...
Click to collapse
I've got the same problem..also a red one.its visible in the dark.when ther's daylight you hardly notice it but only knowing its there drives me crazy -_-
Sent from my GT-I9505 using xda premium

It dissapeared out of nothing!! Yesssss!!!!
Sent from my GT-I9505 using xda premium

Got a stuck pixel over the weekend. Luckily just barely within the 14 day window Doing a return/replace
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[Q] Note 4 display green tint ?

Wen i tilt the phone and white image is displayed there is slight green tint. Is this normal for an amoled screen and if not can i exchange my device because of this ? Thank you in advance.

Etern4ll said:
Wen i tilt the phone and white image is displayed there is slight green tint. Is this normal for an amoled screen and if not can i exchange my device because of this ? Thank you in advance.
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Click to collapse
welcome to xda? o3o
I get more red than green, but it is only when I tilt my phone at a certain angle towards a light source - one which wouldn't allow me to see my screen properly anyways. It doesn't bother me at all during normal use though d: Sorry I can't give you any helpful information haha

JippleStar said:
welcome to xda? o3o
I get more red than green, but it is only when I tilt my phone at a certain angle towards a light source - one which wouldn't allow me to see my screen properly anyways. It doesn't bother me at all during normal use though d: Sorry I can't give you any helpful information haha
Click to expand...
Click to collapse
Thank you man.

What I saw on my and other notes is there is slightly blue or green shift when you look at angle. It doesn't bother me.. Not like flickering of brightness control....

Truth Behold, all AMOLED screens have a tint. Some will have pink tint, others will have a purple tint, some will have green tint, whereas others will have yellow tint. The tint should only be moderate, anything excessive is sure to be defective. These are inherit problems in AMOLED displays, some will not notice the tint as everyone's focal vision is different. Most unboxing videos from Day one will show the tint without the Reviewer's comments. The only reviewer that seems to comment on the hue is Erica Griffin. The newer AMOLED panels are still a lot better than the years before. Enjoy your Note 4.
Make sure your display is set to Adaptive Display for best results.

The custom kernel I'm using on my galaxy S4 has colour tuning built in. Are there not custom kernels for the note 4 that have this also?
Same with my old S1, and my old S2
Have a look through the custom kernel threads.
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Are you suggesting its just how the screens are calibrated?
knuckles1978 said:
The custom kernel I'm using on my galaxy S4 has colour tuning built in. Are there not custom kernels for the note 4 that have this also?
Same with my old S1, and my old S2
Have a look through the custom kernel threads.
Click to expand...
Click to collapse

arjun90 said:
Are you suggesting its just how the screens are calibrated?
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Click to collapse
I don't know the cause of yours. The cause of mine is that the phone is a year old, and the blue pixels wear out faster than red and green, but tweaking the blue fixes it.
Just tweak the green down a bit on yours if you've got a kernel which can do it.
My screen looks horrible without tweaking the blue, and totally perfect with more blue added.
Edit: wait a second... It's perfect when looking at it straight on? Because that's normal if it changes a little when you turn the viewing angle. Only do calibration if it's got a tint when looking at it straight on.

Every Note 4 Owner has a tint somewhere on their display, whether its a pink tint, purple tint, blue tint, yellow tint, whatever the claim is; this is due to the fact of how these displays are calibrated. Viewing the screen from a particular angle usually corrects this, has nothing to do with the subpixel and life expectancy of certain colors on these latest AMOLED Panels. The Blues and Greens are now engineered to last long equally together in the current Note 4. The tint many are describing is to do with the gamma correction. Color accuracy is there, though based on the manufacturing dates the area of tint will vary. I was able to confirm this on '4' AT&T Note 4's all having the same pink tint in the same location. The AMOLED Panels in the Note 4's are far superior than its older gen panels.
It's good to know that there is a mod to adjust the amount of tint. Wish Samsung could have done this job on their end.
knuckles1978 said:
I don't know the cause of yours. The cause of mine is that the phone is a year old, and the blue pixels wear out faster than red and green, but tweaking the blue fixes it.
Just tweak the green down a bit on yours if you've got a kernel which can do it.
My screen looks horrible without tweaking the blue, and totally perfect with more blue added.
Edit: wait a second... It's perfect when looking at it straight on? Because that's normal if it changes a little when you turn the viewing angle. Only do calibration if it's got a tint when looking at it straight on.
Click to expand...
Click to collapse

This is good to know.
Thanks for sharing

Yeah.. pink green tint is still here

After having gone through s6s s6 edges edges + and now my s7 edge and we are talking about a lot of devices I am not surprised to find pink green discolorations at part of my screen anymore.
All of them had it save for one. One device out of 20+. I will probably keep this because everything else seems fine but I can't believe we are still plagued by tints. Mine is an invariable pink and green on whites and greys.

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Are you talking about this tint problem? I see that all the edge have this and the s7 normal won't.

Braulio00 said:
View attachment 3675526
Are you talking about this tint problem? I see that all the edge have this and the s7 normal won't.
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More or less. Bottom right corner of my screen is pinkish then mid is more yellow green then upper more pink. Non uniform whites

evak2979 said:
More or less. Bottom right corner of my screen is pinkish then mid is more yellow green then upper more pink. Non uniform whites
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I know what you are talking about, almost every amoled screen have this uniform tint, Erica show in her YouTube channel.

Braulio00 said:
I know what you are talking about, almost every amoled screen have this uniform tint, Erica show in her YouTube channel.
Click to expand...
Click to collapse
If it was uniform I would be OK with it but mine is pink at places and green at others

evak2979 said:
If it was uniform I would be OK with it but mine is pink at places and green at others
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Click to collapse
And when you put in settings and do what I show in picture? The whites don't change the color?

Braulio00 said:
And when you put in settings and do what I show in picture? The whites don't change the color?
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Click to collapse
They do change on an angle but face first there are a few pink spots and a few green spots.it is not a rainbow on angle effect.

I noticed one edge is a bit pinkish than other. I had issues like this with LG and moto it's most likely a qhd display issue as I only had the issue on them types, it don't bother me that much but no phone will be perfect as long it's not standing out alot
Sent from my SAMSUNG-SM-G935A using Tapatalk

Braulio00 said:
View attachment 3675526
Are you talking about this tint problem? I see that all the edge have this and the s7 normal won't.
Click to expand...
Click to collapse
My edge doesn't have this issue

AngioNicholai said:
My edge doesn't have this issue
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Click to collapse
Nor mine

Mine does and here is a picture.
https://drive.google.com/file/d/0BydA4N8zkhqpbHJqRmFiYXM3Yzg/view?usp=docslist_api
Bottom, more pronounced at bottom right corner. No biggy but t since none else suffers from this I will ask for a replacement

I'm well aware of the issue ( I went through 7 Galaxy S6s last year and never found a perfect one), but my S7 edge is perfect, or at least close enough to perfect that I can't see any tints without going looking for them with a microscope, which I won't do.

neither does mine

I went through 3 s6s on this issue. My s7e does not have it. Pretty uniform. Was the first thing I checked.

I swear I am not going through a microscope. There is a big pink blotch on my phones bottom.
Also the phone arrived dead on battery. Wondering if that is the only one with that? Ordered straight from Samsung.

Either mine doesn't have it, or its so low for me to notice

I'm sure there will still be a few unlucky ones who have it this year, but by and large it seems Samsung has really improved the uniformity of their displays this year. Finally. Of course next year they will probably up the resolution to 4k and reintroduce the tint issues.

evak2979 said:
I swear I am not going through a microscope. There is a big pink blotch on my phones bottom.
Also the phone arrived dead on battery. Wondering if that is the only one with that? Ordered straight from Samsung.
Click to expand...
Click to collapse
No one doubts you I'm sure. Just doesn't seem to be as wide spread as last year.

zathus said:
No one doubts you I'm sure. Just doesn't seem to be as wide spread as last year.
Click to expand...
Click to collapse
Listen 3:38 minute this video, why all edge have discoloration on the edge? Because when you see the screen in the front the edge are the side, all edge have this problem and s7 don't.
http://youtu.be/R1GrWDMQFsM
3:38m

well known problem, and it drove me nuts in the past too:
read here:
http://forum.xda-developers.com/note-4/general/note4-amoled-screen-quality-t2906365
and here:
http://forum.xda-developers.com/showthread.php?t=2463786
as far as i can say its a "luck of the draw" if your screen is perfect or not. chances are high you get no "center cut" panel, so you will have non-uniform screens...

AMOLED contrast

I noticed something weird compared with LCD screens. Every time there is gradient dark/grey color (wallpapers, apps backgrounds, ...) the gradient is always "broken" and become just a big and ugly full black area. I checked on all my previous smartphones with LCD and I have never this issue.
See here my pictures, in the "Battery HD" app, all the top display is only a big black box, is it normal? Can someone install this app a tells if it's the same issue on AMOLED please?
Thanks
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The whole point of AMOLED is that it turns off when displaying black. So yes, by its nature there will be a sharp transition from "dark grey with backlight" to "off".

Yes, AMOLED means black is true black. But what I'm saying is even dark grey become black very fast. On my pictures, you say it's normal but the same thing is perfectly gradient on other phones.
In the app Display Tester, when I test the contrast, the result is very bad!
On this test:
I can't see anything between 0 and 8 with the Pixel 3a, it's just black. But with every other phones (LCD) I can see grey squares up to 2!
Can you test your contrast guys please? With the app or with the test image extraced from the app.

I can't see 0-4 but i can see all the others.
You tried full brightness?

What? You can see 5,6,7,8 ??? Impossible for me, full brightness...

smartuser8 said:
Yes, AMOLED means black is true black. But what I'm saying is even dark grey become black very fast. On my pictures, you say it's normal but the same thing is perfectly gradient on other phones.
In the app Display Tester, when I test the contrast, the result is very bad!
On this test:
I can't see anything between 0 and 8 with the Pixel 3a, it's just black. But with every other phones (LCD) I can see grey squares up to 2!
Can you test your contrast guys please? With the app or with the test image extraced from the app.
Click to expand...
Click to collapse
I am still on my op6 as my pixel has just shipped. But I can see up to level 6 (barely) on this screen.. just fyi.

yeah i can see from 5 up.

yup, check this lagom.nl/lcd-test/black.php
at minimum brightness (which I use a lot at night), I can barely make out the 40 square on my 3a. On my old pixel XL I can see the 10 square...
is there some way to calibrate things?

On your link display test (I will post image for everyone after my post) impossible for me to see anything between 1 > 8. I tried all, in the dark, max and min brightness
On all my previous smartphones (LCD) and laptop I just can't see between 1 > 3.
I really don't understand people who say "it's normal it's amoled so it's black blahblah..." but guys... the purpose of AMOLED is to make BLACK black, not grey black. Those images/tests are contrast test: see NOT BLACK elements (squares) on black background. So it's not about if blacks are black, it's about a lot of GREYS are black on this display where we can see the difference and squares on LCD, so it's not a good contrast. We have to stop to say everytime 'oh black is black so it's a perfect contrast", contrast ISN'T (only) that.
Image:

yup it's not normal in any sense. it's just poor (or lack of) calibration. on any decently calibrated display in a dark room you should be able to faintly see the squares in the top row.

Guys, are you serious? You really see the first line?

smartuser8 said:
Guys, are you serious? You really see the first line?
Click to expand...
Click to collapse
with the brightness all the way up i can see the last item on the first line, definitely nothing before that.

I see 4 red dots