[INFO] miura! AMOLED blotches/lines ANSWER

Search This thread

MrSquiggle

Member
Nov 27, 2011
5
21
Hey guys,

I have a Nokia N9 (which uses an SAMOLED display made by samsung), and there have been some users reporting blotches/lines on their screens when in a pitch black room. I found this forum whilst conducting some research, and signed up after finally discovering what the problem actually is

It seems to be with the technology Samsung is using. According to this website, what you are experiencing is called 'mura'.... lines/spots as a result of an uneven current distribution to the OLEDs.....

Unfortunately as i am a new member, i can't post a link to the website.... but essentially, this company offers a technology that makes sure the mura never appear..... If only Samsung used it!!!!


AMOLED displays have two main layers:
An OLED (organic light-emitting diode) layer that emits light.

A backplane, made of TFT (thin-film transistor) circuits that provide current to the OLEDs, thereby controlling their brightness.

Polysilicon backplanes don’t provide uniform current because of manufacturing non-uniformities. Without IGNIS technology, the TFT circuits will provide different current to the OLEDs, which results in lines, spots, and cloudy areas known as “mura”.

IGNIS AdMo-p™ technology uses a patented TFT pixel circuit and driving scheme to compensate for the non-uniform backplane. So the TFT circuits always provide uniform current to the OLEDs, even though the TFTs themselves aren’t uniform. This means the AMOLED display will always show smooth, mura-free images.


Hopefully this gives everyone a bit of closure; I guess it's a case of finding a phone that has the mura to a lesser extent!
 

tweedie

Senior Member
Dec 28, 2007
167
12
Appears for galaxy nexus too. Adjust brightness fix it sonewhat

Sent from my Galaxy Nexus using XDA App
 

shehrammajid

Senior Member
May 27, 2009
474
76
Houston, TX
Appreciate the insight....however it doesn't explain why my vibrant and galaxy a 4G never had this problem....

Sent from my SGH-T989 using XDA App
 

Tankrat

Senior Member
Nov 24, 2010
263
44
Phoenix
Appreciate the insight....however it doesn't explain why my vibrant and galaxy a 4G never had this problem....

Sent from my SGH-T989 using XDA App

What he is saying is that the lines and blotches are a manufacture/design issue in the displays of the SGS 2 and apparently the Galaxy Nexus as well. Being that SAMOLED screens are that drastically different from the ALOMED screens on the Vibrant and Galaxy 4G.

To bad Samsung didn't do better testing before making the SAMOLED screens our they would have sorted this out before the phones hit the shelves.

Sent from my SGH-T959 using xda premium
 

shehrammajid

Senior Member
May 27, 2009
474
76
Houston, TX
What he is saying is that the lines and blotches are a manufacture/design issue in the displays of the SGS 2 and apparently the Galaxy Nexus as well. Being that SAMOLED screens are that drastically different from the ALOMED screens on the Vibrant and Galaxy 4G.

To bad Samsung didn't do better testing before making the SAMOLED screens our they would have sorted this out before the phones hit the shelves.

Sent from my SGH-T959 using xda premium

I thought the vibrant had super amoled and the galaxy s 2 has the super amoled plus? If that is the case then they should both use the same basic design?

Btw I think this is the link the OP is talking about

http://www.ignisinnovation.com/technology/ignis-technology-overview/ignis-admo-p-technology
 

princeasi

Senior Member
Sep 16, 2006
1,475
201
47
Los Angeles

foreverloco

Senior Member
Oct 20, 2011
2,539
6,790
Gainesville, FL
Op needs to stop spamming for that company this is the second thread he's created with the same exact post

Sent from my SGH-T989 using Tapatalk
 

Tankrat

Senior Member
Nov 24, 2010
263
44
Phoenix
Well since this is a hardware issue like the vibrant's GPS, it is imho more tolerable. I won't be reading the forums in the dark anyways.

For those who want to read in the dark, hopefully a Dev out there can work some magic and get us a software work around, if that is even possible.

Sent from my SGH-T959 using xda premium
 

foreverloco

Senior Member
Oct 20, 2011
2,539
6,790
Gainesville, FL
Dude.... Not saying the info isn't needed but does he really have to open new threads in the same section with the same post every 3hrs? So y don't you go suck a toe and see that he's advertising for the company saying that Samsung should have used them if they didn't want the issue...

Sent from my SGH-T989 using Tapatalk
 

TJBunch1228

Senior Member
Feb 6, 2010
1,373
223
Dude.... Not saying the info isn't needed but does he really have to open new threads in the same section with the same post every 3hrs? So y don't you go suck a toe and see that he's advertising for the company saying that Samsung should have used them if they didn't want the issue...

Sent from my SGH-T989 using Tapatalk

I agree it shouldn't be posted in the same section just a few hours apart, not sure what happened there, but the info is helpful.

And what's wrong with advertising for this company? I doubt he works for them and even if he did, who cares? We all advertise for Samsung with every post we make that has a sig saying what phone we use. This is a pretty uniform issue across the board for devices using SAMOLED i.e. Nokia, Samsung, Motorola. If this company has a way to fix it, these companies should utilize their tech.

Sent from my SGH-T989 using XDA App
 

MrSquiggle

Member
Nov 27, 2011
5
21
Appreciate the insight....however it doesn't explain why my vibrant and galaxy a 4G never had this problem....

Sent from my SGH-T989 using XDA App

Well, I guess some people get lucky? Someone over on the maemo forums said that his Nokia N8 had the problem, which was released last year sometime... Plus many HTC phones etc
 

KillaHurtz

Senior Member
Aug 13, 2010
2,582
706
Albuquerque
What?! You mean he provided pertinent info TWICE?! We need to have him banned!

Dude... He posted in forums about phones that have SAMOLED screens. He's doing us a favor and you are in here flaming like an oiled up pride participant. Just stfu and gtfo.

Sent from my SGH-T989 using XDA App


Muahahahahahahaha.....fawking hilarity, thank you for the giggles.
To the |OP| thanks for the super pertinent info.
 

duckhater

Senior Member
Nov 26, 2011
72
17
So if this is a hardware issue...is there anything Supercurio can really do about it (as I know a bunch of users are pitching in to get him a device)? Not trying to start something, I'm just curious
 

Tankrat

Senior Member
Nov 24, 2010
263
44
Phoenix
So if this is a hardware issue...is there anything Supercurio can really do about it (as I know a bunch of users are pitching in to get him a device)? Not trying to start something, I'm just curious

I don't know of he can do anything about it but he has done some spectacular stuff for the vibrant.

The vibrant was hardware and software deficient for the GPS but some devs out there got it working like a champ with some software miss and also if you were willing to take a risk and either bend a few delicate contacts or do some soldering on your phone's mobo.

So can he fix it? We'll see, quite possible I think

Sent from my SGH-T959 using xda premium
 

duckhater

Senior Member
Nov 26, 2011
72
17
I guess I just don't understand how a poorly manufactured physical screen can be adjusted with a software patch, if the screen itself is faulty how can adjusting the graphics rendering put a band aid on an actual physical fault?

Sent from my SGH-T989 using XDA App
 

Top Liked Posts

  • There are no posts matching your filters.
  • 19
    What?! You mean he provided pertinent info TWICE?! We need to have him banned!

    Dude... He posted in forums about phones that have SAMOLED screens. He's doing us a favor and you are in here flaming like an oiled up pride participant. Just stfu and gtfo.

    Sent from my SGH-T989 using XDA App
    16
    Hey guys,

    I have a Nokia N9 (which uses an SAMOLED display made by samsung), and there have been some users reporting blotches/lines on their screens when in a pitch black room. I found this forum whilst conducting some research, and signed up after finally discovering what the problem actually is

    It seems to be with the technology Samsung is using. According to this website, what you are experiencing is called 'mura'.... lines/spots as a result of an uneven current distribution to the OLEDs.....

    Unfortunately as i am a new member, i can't post a link to the website.... but essentially, this company offers a technology that makes sure the mura never appear..... If only Samsung used it!!!!


    AMOLED displays have two main layers:
    An OLED (organic light-emitting diode) layer that emits light.

    A backplane, made of TFT (thin-film transistor) circuits that provide current to the OLEDs, thereby controlling their brightness.

    Polysilicon backplanes don’t provide uniform current because of manufacturing non-uniformities. Without IGNIS technology, the TFT circuits will provide different current to the OLEDs, which results in lines, spots, and cloudy areas known as “mura”.

    IGNIS AdMo-p™ technology uses a patented TFT pixel circuit and driving scheme to compensate for the non-uniform backplane. So the TFT circuits always provide uniform current to the OLEDs, even though the TFTs themselves aren’t uniform. This means the AMOLED display will always show smooth, mura-free images.


    Hopefully this gives everyone a bit of closure; I guess it's a case of finding a phone that has the mura to a lesser extent!
    4
    I went to edit my post but then something went wrong, hence the duplicate post (which i was unaware of)

    I have no interest in that company whatsoever, i just thought I'd share that information with you seeing as no one else had come across it
    2
    I think you are absolutely right. I love samsung products. I never had issues with any of them(MP3, TV, and etc etc) until I had this phone.. I love this phone except for the annoying screen. I didnt pay $600 so that I can have a phone with this quality of screen.. I'm pretty darn sure by now, they are more than well aware of this issue and they need to immediately address it.

    If it is a calibration issue in which it can be "helped" by software upgrade, they better work on it because how can other AT&T models or SPRINT models have a better screen when its the exact same hardware?

    They really should have tested this phone thoroughly before its initial release... and very unprofessional from such a reputable company like samsung. What's more shocking is how each carrier and samsung is responding to this immediate problem. I swear if they dont address this and leave it as it is......... good bye samsung... not only will i never buy your product again but I will do my best to tarnish your reputation.
    2
    Just wanted to chime in from the att side ...its an issue on our phones too.
    I have now had 5 that had it


    Unless you are referring to the original sgs2.. which really is completely different
    Thank you for all of your help and research. That actually makes a lot of sense. Uneven current would certainly cause the blobs, but what about the lines? Is that a known effect of low current too or a bad manufacturing process?

    This leads me to think why the at&T models do not have vertical lines? And how the current is regulated in the the at&t version vs ours?

    The At&t versions at worst only have a few blobs as far as I have seen.

    ---------- Post added at 03:21 AM ---------- Previous post was at 03:11 AM ----------

    We need an electrical engineer.

    If we increase the current by a hardware mod to the point where there is enough current where the led will all be provided sufficient juice, how badly will it effect the LEDs with less resistance, will they self regulate at some point or to some degree? Will they change color? Could it be that the same current values were used on the bigger screens (T989 / Skyrocket) as on the smaller ones like the AT&T model and thus the AT&T model had sufficient current available? What would current increase mean to life expectancy?



    Sent from my SAMSUNG-SGH-I727 using XDA App