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?
Related
Hello,
I have noticed when I look to my display in more detail I can see strange vertical lines through it. It is not very visible but I can see it better when there is white color for example in mail application, or if I setup blue color for lock screen. I wonder if it's just caused by AMOLED technology or my HW is not ok. Is it same on your devices?
Thanks
emkovicz said:
Hello,
I have noticed when I look to my display in more detail I can see strange vertical lines through it. It is not very visible but I can see it better when there is white color for example in mail application, or if I setup blue color for lock screen. I wonder if it's just caused by AMOLED technology or my HW is not ok. Is it same on your devices?
Thanks
Click to expand...
Click to collapse
what colour are the vertical lines? samsungs OLED screens have pentile technology which kinda sucks in my opinion. basicaly it simplifys the pixel structure quite a lot so that it has the same number if pixels but rather than each one being split into a red, blue, green section they have 2 parts each alternating between red green and blue green. i think advantages are that this makes the screen brighter and colours stronger but it also reduces sharpness and seems to make the pixels more visible. i might be wrong for your case but I didnt realise this when i got the phone. still would choose it for the amazing blacks, just a shame they done have normal pixel structure.
hope that helps
NikD1 said:
what colour are the vertical lines? samsungs OLED screens have pentile technology which kinda sucks in my opinion. basicaly it simplifys the pixel structure quite a lot so that it has the same number if pixels but rather than each one being split into a red, blue, green section they have 2 parts each alternating between red green and blue green. i think advantages are that this makes the screen brighter and colours stronger but it also reduces sharpness and seems to make the pixels more visible. i might be wrong for your case but I didnt realise this when i got the phone. still would choose it for the amazing blacks, just a shame they done have normal pixel structure.
hope that helps
Click to expand...
Click to collapse
Thanks. But I think it's not pentile technology. It looks like tiny straight scratches more visible on top part of the display especially visible on bright color,s for example when I use green for lock screen. I will return it to my seller and hopefully they will fix it or give me a new one.
I noticed it on my Focus, as did Engadget in their Nexus S review:
http://www.engadget.com/2010/12/10/nexus-s-review/
We did see some strange issues with the display -- while it does look handsome in most settings, we noticed some troubling inconsistencies in the panel against certain colors or tones. It was particularly pronounced on solid gray backgrounds (as you can see above). We're not sure the cause of the problem (or if it was simply an issue with the device we had), but it was somewhat troubling.
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Can't decide which bothers me more though, the lines or the fact that the screen dynamically dims itself based the amount of white pixels that are displayed on screen.
I can't see those in my omnia, maybe it's only present in some of the panels?
ricep said:
I can't see those in my omnia, maybe it's only present in some of the panels?
Click to expand...
Click to collapse
It was quite visible in Game hub mostly on top part of the display. Or try to setup your lock screen to green.
I've noticed this on mine too. I'm wondering if it's just a bit of image retention from the live tiles on the home screen, much like you get on plasma screens. I've got a photo frame app which I'm using as a screen saver for a couple of mins each day to 'clean' the screen.
It may do nothing, but it's worth a try
emkovicz said:
It was quite visible in Game hub mostly on top part of the display. Or try to setup your lock screen to green.
Click to expand...
Click to collapse
cant say i can see any lines in the game hub but the green really seems to make the pixels more visible on the white 'games' writing at the top
My Guess would be that this too is due to the PenTile Matrix used by Samsungs Super AMOLED Screens. As the green occurs more often but only at half the size this might lead to this effect:
http://en.wikipedia.org/wiki/File:Nexus_one_screen_microscope.jpg
Sometimes I'm tempted to dub the Display a Super Lame-OLED but only until I see the colors next to a non OLED Display.
StevieBallz said:
My Guess would be that this too is due to the PenTile Matrix used by Samsungs Super AMOLED Screens. As the green occurs more often but only at half the size this might lead to this effect:
http://en.wikipedia.org/wiki/File:Nexus_one_screen_microscope.jpg
Sometimes I'm tempted to dub the Display a Super Lame-OLED but only until I see the colors next to a non OLED Display.
Click to expand...
Click to collapse
That's interesting. My problem looked like those tiny green vertical lines on your picture, but mine had grey colour and were very visible on top part of the display, in the center I could barely notice them. The other thing is that I should see them very close to each other but in my case they were 2-3 milimeters far away from each other, which convinced me that my HW is broken. Also when I showed it to the seller he advised me to send it back for repair.
So my excitement kinda came to an early end last night. I got my second replacement mt4g due to a bad screen. This one is perfect...except that when I was reading some text on a page with a white background, I noticed that from bottom to top, the white gradually goes from white to this yellowish tint. I will post a picture of it later on tonight.
My question is, do you have/had this problem and did you end up returning it or did it go away kind of like when this was happening to the iphone 4? I really hope this really doesn't become a full-blown issue like with the washed colors, because then I would have to request a 3rd replacement and make sure that it doesn't have dead pixels, dust under the screen, washed out colors, yellow tint, crooked ffc, creaky buttons, and gaps around the bezel. Thanks.
Here is an example of what i'm talking about except my display is white at the bottom and gradually goes to the color of the phone that is on the right, at the top.
http://forum.xda-developers.com/showthread.php?t=856792
Here you go guys:
img831.imageshack.us/img831/159/img1091z.jpg
(sorry for the link, I haven't posted 8+ times yet)
My bosses phone has looked like that since day 1
Sent from my HTC Glacier using XDA App
ESKIMOn00b said:
My bosses phone has looked like that since day 1
Sent from my HTC Glacier using XDA App
Click to expand...
Click to collapse
Do you think that the problem is improper screen calibration and all I have to do is wait for a software update?
225 views and one reply?? Really guys?? Not trying to sound like I'm whining, but this is a serious problem and I think i'm not the only one. I just received my replacement, and it too has this yellowish tint towards the top of the screen. This will be my 4th time that I will be requesting a replacement, so in total so far, 4 defective phones.
ur phone has a bad screen. when black looks more light greyish and when white doesn't quite look white, bad screen.
return it, these are things u wanna check within the first few days!
Sent from my HTC Glacier using XDA App
I'm sorry, but it's really difficult to tell based on the picture you linked. Is there any way you can take a comparison photo with a good screen?
I can't see anything wrong from that photo. It will take something more than this to let others know if you have a problem.
smirkis said:
ur phone has a bad screen. when black looks more light greyish and when white doesn't quite look white, bad screen.
return it, these are things u wanna check within the first few days!
Sent from my HTC Glacier using XDA App
Click to expand...
Click to collapse
The blacks never looked grayish, the colors were bright, crisp and vibrant, it was when looking at something with a white background. This issue has nothing to do with the washed screens that people are getting.
bobsbbq said:
I can't see anything wrong from that photo. It will take something more than this to let others know if you have a problem.
Click to expand...
Click to collapse
I figured it out based on a chat I had with a friend. I think that the backlight was improperly calibrated or something. Sorry that I can't take a better picture as I have already received my exchange which is much much better, the light is just more distributed evenly then the previous phone. Plus it doesn't creak, the ffc is dead centered, and light doesn't leak through between the bezel and the screen at the top of the phone. After 4 exchanges(5 phones total), I finally got a "perfect" device.
Here is a side-by-side shot sort of(I returned the defective device before I could think of take a pic of them together due to my excitement!)
You can easily tell that the screen of the phone on the right has way more light at the bottom of it and the top doesn't which results in a more obvious yellowish tint. The phone on the left (good one) doesn't have it as bad, the light is distributed evenly. Both were on auto brightness. The good display's(right) brightness is down a bit more but it doesn't matter since I tried to increase and decrease the brightness on the defective one(left) and it made no difference.
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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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Just bought a LG G Pad 8.3 a few days ago after reading the many positive reviews online.
Was especially looking forward to the supposedly high quality screen with excellent color accuracy, as it is also marketed by LG.
So it is with disappointment to discover that my unit does not exhibit these qualities.
The screen on mine has a low color accuracy, especially with reds.
Red colors deviate quite a lot and look almost orange. This results in a poor viewing experience and was not what i expected. Most review videos and photos i have watched does not show this color imprecision.
I suppose i am not the only one with a screen looking like this.
It seems like the screen has not been calibrated properly from the factory.
I feel that i have gotten an inferior product and questions if this is general quality problem with the tablet?
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A lot of us have a yellowish screen (including me), I personally fixed it using Screen Adjuster, then the CM 11 built in color adjuster. You can try the color correcting methods I mentioned or use your warranty for a replacement.
Sent from my iPhone using Tapatalk
I don't really consider my screen as being "yellowish". The whites displayed are pretty neutral i think.
I already tried Screen Adjuster as you suggested, but i have not been able to get any improvement with it. Rooting is not something i want to do for now.
I suspect that LG is sourcing different LCD panels for this device, and that they are not all of equal quality or calibrated to the same standard.
The early production units, among those sent to reviewers, seems to have screens of higher quality with more accurate colours.
Mine is a 402 production.
With the replaced display I also noticed orange-ish red. The white is white, black is black, no lightbleed or yellow-ish screen. I compared some pics on a professional Dell U2412M IPS monitor and the red was really horrible orange-ish on G Pad.
Zarrick19 said:
With the replaced display I also noticed orange-ish red. The white is white, black is black, no lightbleed or yellow-ish screen. I compared some pics on a professional Dell U2412M IPS monitor and the red was really horrible orange-ish on G Pad.
Click to expand...
Click to collapse
Thank you for sharing your experiences. Please cast a vote in the poll.
Could you perhaps show a photo of your screen?
I think that LG at some point changed the IPS panel used in G Pad 8.3 for a different one. After all of the problems reported with the early productions this would seem appropriate.
It seems, though, that the color calibration of the panels have gone wrong in the process.
It's regrettable, as i otherwise like the aspects of the tablet. I guess i will just have to live with it or buy something else.
I think that the major problem is the gamma curve setting. If you can and know how to, try the kernel posted in the Android development section, which has improved (normal) gamma, although it has possibly some other minor issues unrelated to the display, but nothing unrecoverable - you can flash back to stock kernel easily.
I am currently running with it so you can rest assured that the tablet is not going to die, or something
P.S. Maybe I spoke too soon - had to revert back to the stock kernel because I got apps crashing and also some spontaneous system reboots with the suggested kernel, probably due to the additional tweaks in it, apart from the gamma tweak.
Zarrick19 said:
With the replaced display I also noticed orange-ish red. The white is white, black is black, no lightbleed or yellow-ish screen. I compared some pics on a professional Dell U2412M IPS monitor and the red was really horrible orange-ish on G Pad.
Click to expand...
Click to collapse
Although I do not have any orange issues, it is true the colors are not perfect, but nor are they bad, at least on mine. My monitors are all color-calibrated and I too have made comparisons. You can use Trickster Mod to adjust the colors, but the gamma really requires the kernel of the ROM in my sig. Bear in mind that though Dell produces a nice monitor, if it is not specifically color-calibrated, then it too is not a reliable source.
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.
Click to expand...
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?
Click to expand...
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.
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This is good to know.
Thanks for sharing