Database Users

Omnia 7 - strange vertical lines on display

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.
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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.

Does the screen have a bluish tint in the whites similar to galaxy s3?

have they improved it? I can't find any close picture comparisons.. Thanks.

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Looks better, but still there. I guess they're doing it to increase screen life or something, but absolutely hate that.
Once I installed Perseus on my Note II, I could hardly believe I'm looking at the same screen. Looks even better than iPhone 5 after calibration

yeah, but note 2 doesn't have pentile, doesn't it have a superior screen?

It does, yeah. But you can still see the bluish tint there. SIII/IV it's more greenish isn't it?
I have no idea why Samsung doesn't use RGB instead, is it because it isn't yet available for high PPI full HD screens?

tuxonhtc said:
It does, yeah. But you can still see the bluish tint there. SIII/IV it's more greenish isn't it?
I have no idea why Samsung doesn't use RGB instead, is it because it isn't yet available for high PPI full HD screens?
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I believe posters on here claimed cost reasons. too bad.. I prefer the overall design and build, screensize to handset ratio of the s4, but like the htc one screen..

That might not be apparent in normal vision though. S3 has noticeable graininess, but the pixel density on S4 should pretty much settle that IMO.
And I don't know if they took the screenshot with adobe RGB mode or saturated standard mode.
I love SAMOLED, but just wish if they could switch entirely to RGB. Wouldn't mind paying a few extra bucks either tbh if they implemented that on Note 3.

tuxonhtc said:
It does, yeah. But you can still see the bluish tint there. SIII/IV it's more greenish isn't it?
I have no idea why Samsung doesn't use RGB instead, is it because it isn't yet available for high PPI full HD screens?
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Click to collapse
I don't think they can manufacture FHD 1080p yet. At least not in the amounts that the GS4 would demand at a reasonable price.

tuxonhtc said:
That might not be apparent in normal vision though. S3 has noticeable graininess, but the pixel density on S4 should pretty much settle that IMO.
And I don't know if they took the screenshot with adobe RGB mode or saturated standard mode.
I love SAMOLED, but just wish if they could switch entirely to RGB. Wouldn't mind paying a few extra bucks either tbh if they implemented that on Note 3.
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Click to collapse
Yup, two issues: sharpness and color. It looks like the higher resolution overcame the less sharp drawback of pentile, but color tint looks is still there. need to verify what color mode the phone was in though.

welll, just got back from store. htc one's have multiple dipslay with different WB. but the s4 definitely had better WB in my eyes.
http://forum.xda-developers.com/showpost.php?p=40903338&postcount=225

Why is this thread even open ? Amoleds will always have a bluish tint. LCDs always have better whites but suffer on black levels.

KillaHurtz said:
Why is this thread even open ? Amoleds will always have a bluish tint. LCDs always have better whites but suffer on black levels.
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if you read my response, you'll see that the One has a more bluish tint than the S4.

[Q] Black level

Searched google and couldn't find user input on the black level. According to that early test by a Chinese site they found black level to be extremely good. Here's the image
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Now as the phones reaching users can anyone confirm in pitch black the amoled output? To me that's the most impressive improvement dating back to when amoled first went HD on the galaxy nexus and lost that level of output.

Yes, it is totally black. Way better than S3 and Note 2.

The blacks are the best I've ever seen.
The pixels are completely off, as opposed to previous amoled screens where there was still a light glow.

Wanted to give this Q too I had previously SGS2 and SGS3 is it even better than SGS2 display in the case of black displaying? I was very satisfied with SGS2 blacks... THX

kultus said:
Wanted to give this Q too I had previously SGS2 and SGS3 is it even better than SGS2 display in the case of black displaying? I was very satisfied with SGS2 blacks... THX
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It's much better., Infact it''s impossible to get better blacks as the pixels are completely off.
I was always disappointed with previous phones as in a dark room once your eyes focused the blacks would look light grey and you could see blotches and streaks.
On the s4 you see nothing at all.
If you switch your phone on in the dark all you see is the samsung logo on the screen, nothing else.

perfect THX for response I hope that will have zero stuck/dead pixels

That's amazing. It's pretty poor form that all reviews as far as I'm aware have stated the previous amoleds with that slight glow as infinite black.
Anyway the S4 finally has something I'm really jealous of now. Another question similarly relating, does the brightness go lower than the S3?
?????? Galaxy S3 ??????

I think something is wrong with mine. I have the Galaxy S3 and I would say it's a really dark gray, not quite black. But on the S4, I'd say it has a reddish tint to it when I have it all black in a dark room. I may try and take a picture of it tonight.

jasbur17 said:
I think something is wrong with mine. I have the Galaxy S3 and I would say it's a really dark gray, not quite black. But on the S4, I'd say it has a reddish tint to it when I have it all black in a dark room. I may try and take a picture of it tonight.
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I think its every device or atleast very common, but most people havent notice it (atleast not yet) . Ive come to realize its software related so im not freaking out yet. Just posted this in the ATT forums: http://forum.xda-developers.com/showpost.php?p=40841213&postcount=104

It is honestly that black that when I was waiting on a video to buffer in my pitch black room that it looked like the blue circle was floating!! literaly no light on screen apart from the blue circle. It actually looks really cool lol

Infy_AsiX said:
That's amazing. It's pretty poor form that all reviews as far as I'm aware have stated the previous amoleds with that slight glow as infinite black.
Anyway the S4 finally has something I'm really jealous of now. Another question similarly relating, does the brightness go lower than the S3?
?????? Galaxy S3 ??????
Click to expand...
Click to collapse
It is brighter than S3. :good:

It is perfectly black unless you suffer from the bug I posted about here: http://forum.xda-developers.com/showthread.php?t=2256651 .

its pitch black, i tried finding some ink spots/ blotches and black level last night but failed miserably

suadion said:
It is perfectly black unless you suffer from the bug I posted about here: http://forum.xda-developers.com/showthread.php?t=2256651 .
Click to expand...
Click to collapse
ghosting problem I'm reading on xda sounds bad too
?????? Galaxy S3 ??????

There is a comparison between S3 and S4 black/grey scale in this video, FFW to 17:10 (or watch the whole unboxing and comparison to HTC One video if you want).
You may have seen this by now, but if not it might answer some of your questions.

Screen lacks color accuracy

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.

Dark colors not uniform from top to bottom of display

I'm noticing an issue with my S8 AMOLED panel and curious if anyone else has this issue.
On darker colors, the top of my screen is noticeably lighter than the bottom. This creates a gradient type effect on apps with dark themes. Tapatalk's dark theme, for instance, is very noticeable and at first I thought maybe they updated the app with a gradient background between me switching from my HTC 10 to the S8. Then I noticed it in other apps and when changing the screen orientation, the gradient shifts along with the device.
The S8 is my first Samsung and is my first phone with AMOLED. Is this color disparity common, or should I try to have TMobile replace my device? Thanks!

Managed to capture it in pictures taken using my HTC 10.
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certainly contact TMobile to get a replacement, I've seen no such issue with my device

I use dark or black walls and or themes and haven't noticed it either.

i am having exactly the same issue but only in home screen....dark wallpapers are noticeably lighter on top than bottom...any ideas? Almosta as a gradient below status bar...not on apps!!

I haven't noticed this on my S8+.
Is it not because the screen is so tall that you are often looking at it at an angle?

So I called T-Mobile and requested a replacement. They sent me to the nearest retail store and had it swapped out. The new display doesn't have the gradient darks issue. Yay... Unfortunately, this new device has pink edges where the last one did not. Can't win.
My HTC 10 had a pink tint to the screen when I bought it and it eventually went away, so I'll keep the new S8 for a bit to see if maybe the screen bond is still curing. I'll give it a week before I request another replacement.
Sent from my HTC 10 using Tapatalk

The AMOLED lottery. Got the same issue with non-uniform black colors as well.
Journalists like to call this the best display on the market - because they get preselected perfect samples. We do not.

That is a defect with OLED panels. Slind hit the nail on the head! Reviewers get a hand-picked perfect version and I don't doubt that their phones do have the Best Display, but we get half-assed defective non-uniform panels that go from yellowish to pinkish looking causing a gradient and sometimes blotches.
This has been going on since the galaxy S6 for me. I will not pay $750 and settle for less. I return/exchange the phones that have these issues and sometimes you will go through 4-5 phones before you find an acceptable one.
AMOLED LOTTERY
Red tint screen
Pink tint Screen

I wish i didn't read this thread. Same problem here.

Curios thing is i only have this problem in homescreen with a black wallpaper...not in apps wich status bar is black...only noticeable in home screen...if i select a black image in gallery it looks uniform...but that same image applied as a wallpaper dont...strange i know!!!

jmartesc said:
Curios thing is i only have this problem in homescreen with a black wallpaper...not in apps wich status bar is black...only noticeable in home screen...if i select a black image in gallery it looks uniform...but that same image applied as a wallpaper dont...strange i know!!!
Click to expand...
Click to collapse
Yes, and because of this I don't think it's a defective screen issue. I believe it's a software issue in the setting of the wallpapers for the home screen. Which means, unless a bunch of us raise hell about it, it's not going to be fixed.

same problem here, for me the issue its mostly an issue that creates an odd sensation during gearvr, when play a game withbtoo dark a scene you loose vision in one eye...

Ok, i'm in the same boat, i have an unlocked Exynos S8, same issue on top of the screen with black wallpapers, little gradient... I tested the stock launcher and it's there, then i open in the gallery the pure plain black wallpaper and zoomed in to vie full black and surprise, the gradient isn't there, ok, so IS NOT HARDWARE.... then i test nova launcher and yes, the gradient is there... ok,ok, i tested like 5 random launcher, some of them are perfect with the black solid wallpaper (no gradient issue on top) and some of them had it....
but why touchwiz?.... why the stock... is not hardware.... it's all i can say
---------- Post added at 07:37 PM ---------- Previous post was at 07:02 PM ----------
Quick update: I you use the store's theme "material black" you can have a pure black top on touchwiz... so yes, god, it's a software issue.... using that theme gives me a pure black top man, again, why not the stock theme... greetings