AMOLED blotches/lines ANSWER - T-Mobile Samsung Galaxy S II SGH-T989

AMOLED blotches/lines ANSWER - T-Mobile Samsung Galaxy S II SGH-T989

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!

Thanks. Good info. Pls type the link so i can cut and paste into my browser
Sent from my SGH-T989 using xda premium

Related

SUPER-AMOLED versus AMOLED? Whats the difference?

I have been wondering this myself. I knew it was "brighter" but what else is the difference with this screen. Well, the BIG deal is that the digitizer is part of the glass not overlaid so you won't have the possibility to get dust under the glass but on top of the pixels... Like on Desire.
(from wiki)
Super Active-Matrix Organic Light-Emitting Diode or Super AMOLED is a display technology for use in mobile devices such as mobile phones. It differs from many other display technologies in that the layer which detects touch is integrated into the screen rather than being overlaid on top.
Compared with the first-generation AMOLED, the Super AMOLED claimed advantages are:
* 20% brighter screen
* 80% less sunlight reflection
* 20% reduced power consumption
HTCs next gen phones will no doubt have it as standard. I like the Desires screen, but I just wondered what the exact differences were with all this "super" talk. there you go. better in sunlight, and no dust, and brighter, and less power. thats it.

mcgon1979 said:
I have been wondering this myself. I knew it was "brighter" but what else is the difference with this screen. Well, the BIG deal is that the digitizer is part of the glass not overlaid so you won't have the possibility to get dust under the glass but on top of the pixels... Like on Desire.
(from wiki)
Super Active-Matrix Organic Light-Emitting Diode or Super AMOLED is a display technology for use in mobile devices such as mobile phones. It differs from many other display technologies in that the layer which detects touch is integrated into the screen rather than being overlaid on top.
Compared with the first-generation AMOLED, the Super AMOLED claimed advantages are:
* 20% brighter screen
* 80% less sunlight reflection
* 20% reduced power consumption
HTCs next gen phones will no doubt have it as standard. I like the Desires screen, but I just wondered what the exact differences were with all this "super" talk. there you go. better in sunlight, and no dust, and brighter, and less power. thats it.
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htc has already said it will be going back to lcd screens as amoled technology is too expensive, i think even the future desires will be made with lcd screens

AndroHero said:
htc has already said it will be going back to lcd screens as amoled technology is too expensive
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Do you have a source for this?

would love a source for that. I cannot believe that. LCD is old hat now and with Samsung planning to bring on 2 huge facilities for S-AMOLED production by 2013 it seems ridiculous to suggest HTC have ruled out using this technology in the future due to expense. It will become cheaper as it becomes more common place. It's certainly the way forward for mobile device screens. back lit lcd is inefficient.

AndroHero said:
htc has already said it will be going back to lcd screens as amoled technology is too expensive, i think even the future desires will be made with lcd screens
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Can't be further from the truth.
The reason why HTC is considering switching back to LCD for many of its currently AMOLED-equipped handsets is that there is a huge shortage of AMOLED screens. Apparently, all of these AMOLED screens are provided by Samsung, and Samsung is not producing enough of them.
Source: Just google HTC AMOLED SAMSUNG and you will get many links to related stories, for example
http://www.oled-display.net/the-sma...tc-must-switch-the-display-from-amoled-to-lcd
Conspiracy theory: Samsung has no problem producing enough Super AMOLED screens for their Galaxy S, which is available on almost every carrier. Samsung has said that it wouldn't make Super AMOLED screen available to other cellphone manufacturers within the year. Coincidence?

tsekh501 said:
Can't be further from the truth.
The reason why HTC is considering switching back to LCD for many of its currently AMOLED-equipped handsets is that there is a huge shortage of AMOLED screens. Apparently, all of these AMOLED screens are provided by Samsung, and Samsung is not producing enough of them.
Source: Just google HTC AMOLED SAMSUNG and you will get many links to related stories, for example
http://www.oled-display.net/the-sma...tc-must-switch-the-display-from-amoled-to-lcd
Conspiracy theory: Samsung has no problem producing enough Super AMOLED screens for their Galaxy S, which is available on almost every carrier. Samsung has said that it wouldn't make Super AMOLED screen available to other cellphone manufacturers within the year. Coincidence?
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soory, thats just what i heard lol you know how facts can get twisted on forums like this lol

That thing about Samsung's shortage is very funny indeed. There was no shortage just until the Galaxy S came out.
Yet, you gotta consider Samsung's move here. Samsung has the leading screen technology for their phones only. If you want the best you're pretty much obligated to get a Samsung.
Then again, with this move, they can't profit of selling SuperAMOLED screens to other manufacturers.
So if they are faking it, they are gambling on the point of having the best the market has to offer.

I don't think samsung is gambling here, they are still dependent on collaboration within the industry regarding so many other components that they make, so they wont risking alienating partners because of amoled screens alone, that is only one of their many business areas. I think it's just a shortage, that's it. If they can't make enough, they can't.
Also consider that samsungs phone division may have contractual preference in deliveries for Co-funding the new plant for example. I'm just speculating wildly tog give examples on possible business complexety involved.
Excluding supplies will for example not provide the increased price / revenue that an open market and limited supplies competition would give.
Sent from my HTC Desire using XDA App

They're not going to cripple HTC by not producing screens for them, especially since HTC can simple switch to another supplier, and get SLCD screens made by Sony for the Desire/Nexus One. It would also destroy HTC and Samsung's relationship if they did that.
On a side note, Yes Samsung has said they are keeping Super AMOLED tech to themselves for 18 months.

ive always wondered the difference too lol

Super-Amoled Plus
At OLED-Display.net there is also a graphic from Samsung Mobile Display which explain Super-Amoled-Plus:
oled-display.net/what-is-super-amoled-plus

I thought SuperAMOLED were made only by Samsung.
Thought they may as well be called SamsungAMOLED screens...

Umm, let's not forget that S-LCD comes from Samsung and Sony. Basically, Desires have Sony displays if i recall correctly.
Samsung has a well known history in shaping the market as they please ( memory chips lawsuits as much you like ).
There is no such thing as shortage of displays on a global scale. Amoled and S-Amoled are also made by Samsung (yours truly ).
Until S-LCD pays off enough , they will not think of changing the factory technology to make newer displays.
No conspiracy, it's only business and Samsung is good at it.
As far as I'm concerned S-LCD , Amoled and S-Amoled equally suck. I believe in better displays.

amoled suck because of the colorfilter degration. once they find the proper materals, they will be superior, unless u want higher refreshrates, that wont be easy, maybe with graphs to replace the coppwr wiring
Sent from my GT-I9000 using XDA App

mcgon1979 said:
would love a source for that. I cannot believe that. LCD is old hat now and with Samsung planning to bring on 2 huge facilities for S-AMOLED production by 2013 it seems ridiculous to suggest HTC have ruled out using this technology in the future due to expense. It will become cheaper as it becomes more common place. It's certainly the way forward for mobile device screens. back lit lcd is inefficient.
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I totally agree.

HTC to replace AMOLED with SLCD.

Just read this article on how HTC are planning to replace the beloved AMOLED screens with Super LCD screens later this summer, both on the Nexus One and HTC Desire...
http://www.talkandroid.com/7681-slcd-displays-added-to-htc-desire-nexus-one/
For us existing owners, fair or unfair?
Sent from my HTC Desire using XDA App

So people want an SLCD screen over an AMOLED? :S I thought AMOLED were superior, with better battery life and more vivid colours? And why do some people hate pentile screens so much. I've got a replacement HTC desire due - and I'm just hoping it's an AMOLED screen, rather than a SLCD... but from some of the comments I'm hearing, I should be hoping it's an SLCD?

“The SLCD displays provide consumers with a comparable visual experience to HTC’s current 3.7 inch displays with some additional benefits including battery performance.”
Better battery life has been touted as one of the advantages of AMOLED, but HTC claims that the new SLCD screens have five times better power management than standard older LCD screens, nullifying AMOLEDs advantage in that regard. AMOLED also struggles in bright sunlight, so SLCD could win out there too. Finally, HTC also said that SLCD can now compete on viewing angles too, thanks to Sony’s “VSPEC III technology”.
An HTC spokesman told TrustedReviews that both variants will be on sale at the same time and that it believed that that most people will not be able to tell the difference between the two types of display. It is not clear at this stage how they will be differentiated in the market, if at all.
I want LCD

I would want the LCD screen too, just for the benefit of battery performance... wish we could send our devices back for this upgrade, should have been part of the warranty agreement!
Sent from my HTC Desire using XDA App

MasDroid said:
I would want the LCD screen too, just for the benefit of battery performance... wish we could send our devices back for this upgrade, should have been part of the warranty agreement!
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The "improved" battery performance is over traditional LCD displays - not the AMOLED display used in the Desire!
I'm almost positive that you'll find that the AMOLED display currently in the Desire is better than the SLCD that will replace it. IMHO, the *only* reason HTC are moving to SLCD is because Samsung cannot deliver the required AMOLED screens in sufficient quantities, and the rest of that press release is "spin" to make it sound like it is some sort of upgrade.
Regards,
Dave

@Dave Ah yes... i misread the above statement
Sent from my HTC Desire using XDA App

I think foxmeister is right... HTC had no choice but to make this change and so they're trying to convince us that it's in our best interest.
Whenever I use my iPod Touch I immediately notice the grey blacks and washed out colours... and that's a pretty well regarded LCD. The only comments I've read on the forum from people who've received replacement Desires with the new screen have been negative.
If my Desire breaks and they try and replace it with an SLCD model, I will not go down without a fight!

1.Still it is improvement.
Even now battery life nearly the same if you use light screen(dont like darkness).
2.No Pentile.
For me its a +.(just cant get used to it)
3.No pink screens. (for some, mine is very, very little noticeable.)
4.More realistic colors.

One thing I love about the OLED tech is the gorgeous perfect blacks. Current LCD technology by its nature can not top that.
On the other hand sunlight visibility is probably a more important issue
I wouldn't worry about color saturation fidelity : I think it is a non-issue, (as long as it's not awful) it's mainly a matter of preference on a handset (nobody will be doing color correction and/or color grading on a display smaller than 24" ).
The reason for the switch is rumored to be a shortage of AMOLED screens anyway.
When you switch from AMOLED to SLCD you lose the perfect blacks but possibly gain better sunlight visibility, and maybe gain/lose a bit more natural/muted colors.

Does someone know if they are going to correct the multitouch bug with this new screen?

If you read the PR blurb, it reads very much like HTC trying to convince people that the SLCD is "as good" as AMOLD rather than "better". If there was a genuine advantage, HTC would use this as a chance to sing its praises, so I suspect that the SLCD screen will likely be slightly inferior to our current AMOLD screens.
For anyone thinking of replacing their current desire with this new one, I'd advise waiting until someone properly reviews and tests the screen.

neoKushan said:
If you read the PR blurb, it reads very much like HTC trying to convince people that the SLCD is "as good" as AMOLD rather than "better". If there was a genuine advantage, HTC would use this as a chance to sing its praises, so I suspect that the SLCD screen will likely be slightly inferior to our current AMOLD screens.
For anyone thinking of replacing their current desire with this new one, I'd advise waiting until someone properly reviews and tests the screen.
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Nope. It was more HTC saying that they're very similar. They couldn't tout that one was better than the other due to commercial implications (e.g. old desire owners would be unhappy etc.). They couldn't say they were equal as they're different technologies. 'Comparible' keeps it PC and implies gains and losses, but overall similar.

There is an comparison
No text sharpness test

Agree with manni calavera, to my opinion the trade is going to be between the perfect black/vivid colours of amoled vs the better sunlight legibility of the SLCD. I don't expect a drastic change of the battery performance, only a few % up our down.
Sent from my HTC Desire using XDA App

This just looks like spin to make SLCDs appear technically as good when they are not. They'll have higher reflectance, max luminance and lower max white power but they can't outclass AMOLED in anything other. The colour reproduction will be dependent on MFG calibration/software.
1. Some other reports on the topic:
http://www.pcworld.com/article/201883/shortages_prompt_htc_to_swap_display_technologies.html
http://www.fudzilla.com/mobiles/mobiles/htc-dumps-amoled
http://wmpoweruser.com/htc-confirms-slcd-rumours-claims-its-better-than-amoled/?mobify=0
Heh.
This was the original press release by HTC:
Taoyuan, TAIWAN – July 26, 2010 – HTC Corporation, a global designer of smartphones, today introduced Super LCD display (SLCD) technology into a variety of HTC phones including the HTC Desire and global Nexus One later this summer. The SLCD display offers an exceptional natural balanced colour, clear contrast, broad viewing angles and improved power efficiency.
"HTC is experiencing high-demand for many of our phones, specifically our phones with 3.7 inch displays. The new SLCD display technology enables us to ramp up our production capabilities quickly to meet the high-demand," said Peter Chou, CEO of HTC Corporation. "The SLCD displays provide consumers with a comparable visual experience to HTC's current 3.7 inch displays with some additional benefits including battery performance."
SLCD is the latest generation of LCD technology that offers improved performance from earlier LCD panels including approximately five times better power management. SLCDs also offer an enhanced viewing experience with wider viewing angles that are enabled by Sony's new VSPEC III™ technology."
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2. See the technology advantages?
http://data.4dsystems.com.au/downloads/micro-OLED/Docs/4D_AMOLED_Presentation.pdf
http://www.datamodul.com/us/page/popup_pages/OLED/CMEL OLED power consumption and lifetime.pdf
Except for a full white screen or full blue, at max brightness, I highly doubt they are going to get anywhere near that low power with an LCD in the typical application with various colours or on your homescreens. Definitely not when playing a movie, a game or so on.
3. AMOLED is far more costly to manufacture and more costly to buy than LCD tech. Every major smartphone MFG (except Apple/Blackberry AFAIK) wouldn't have jumped on the bandwagon if there weren't significant benefits to the technology over the older LCD tech as it was costing them more and introducing major delays to their roadmaps with the tight supply.
4. Samsung is the no.1 LCD/Tv/AMOLED maker in the world. At a very recent engineering conference, yet again, the paper they presented is eulogising AMOLED displays everywhere:
http://www.eetimes.com/electronics-...ec-anoints-AMOLED-displays-as-next-big-thing-
http://i.cmpnet.com/eetimes/51-1.pdf
5. Display tests done on Droid/Nexus One/iPhone 3GS screens revealed their combined power consumption somewhat.
http://www.displaymate.com/Motorola_Droid_ShootOut.htm
http://www.displaymate.com/Nexus_One_ShootOut.htm
http://www.displaymate.com/Nexus_iPhone_ShootOut.htm
The Droid had the best LCD display accuracy by far but compare the max RGB sub-pixel power draws... AMOLED is at least half if not lower. Those were "synthetic" tests. Had they ran a movie or displayed an image and measured power, you'd see the AMOLED at least 1/2 if not 1/3 to 1/4 of the power (unless it was full white or blue - no pun). "SLCD" isn't that much of an improvement to outclass those LCDs by 1.5x in power, let alone 5x.
6. Sonys VSPEC III LCD specs are here, and they're nothing special except the much improved viewing angle:
http://www.sony.net/Products/SC-HP/cx_news/vol55/pdf/acx391akb.pdf
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- Sent via my HTC Desire -

i personally think AMOLED is poor, text look really had when they are not zoomed in. you can see each dots when you look at a website text or picture. Fine example would be the home screen. The icons look dotty like old skool dot matrix printer.
I'm comparing this to a Good LCD found in nokia n900 and iphone 4

Sebacestmoi said:
Does someone know if they are going to correct the multitouch bug with this new screen?
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I would also like to know this, Seen as HTC has ditched the synaptic clearpad 2000. New touch sensor aswell as screen? can anyone confirm?

i wouldn't do that if i were u

i wouldn't do that if i were you

This post has been deleted due to terms of violations.

Mura Effect & AMOLED Displays (Note II)

Most of us know by now the limitations of Producing AMOLED Displays for devices such as the Galaxy S, S2, Note 1, S3, and Note 2. All of these devices share the same screen-technology. There is always praise for OLED, but the technology is still pre-mature; that is why when you look at your display in the dark, you come across something called, the Mura Effect. Some folks claim they don't have it on their AMOLED displays. However, all AMOLED displays have this limitation. Obviously, Samsung doesn't want to tell you this. Some might then consider their phone to be defective, whereas some won't.. There is some degree as to how much Mura Effect your display has. Some displays have the Mura Effect in the form of black lines, / blotches, & dots, and some will have them in the form of faint stains, which can only be looked upon when viewed closely in the dark.
From my understanding, the Mura Effect occurs due to the way the display is aligned with the TFT. AMOLED displays are assembled in two layers, the OLED film on top, and the transistor plane below. Due to limitations of the manufacturing process, it is very difficult to get both layers aligned correctly & perfectly to produce a uniform, seamless, display; note that AMOLED displays are very thin. The contacts of the transistors which power the OLED screen are not 100% set on our displays. Therefore, problems begin to stir when you bring the brightness down to the minimum level; insufficient voltage prevents all the pixels on your AMOLED display to light uniformly. That's why brightness unformity issues are very common in AMOLED Displays as well. Voltage is too low at low brightness to get flawless picture quality. The low voltage at low brightness is too low to power all the pixels effectively in our displays. This explains why the Mura Effect shows.
I've made some interesting observations on the past AMOLED display's I've dealt with in the past.
1). In Displays which do not consist of black lines and blotches, but do consist of blocks of faint black stains entailing the Mura Effect; and faint horizontal lines (which become more prominent overtime), burn-in faster, and brightness uniformity issues, become quickly apparent in these particular displays. Colors are warmer compared to the contrary. Some yellowish tint / pink hue is also to be spotted.
2). Whereas, in displays which do display their Mura Effect in the form of lines of little blotches / dots, tend to have a better color reproduction & brightness uniformity, and do not show faint horizontal lines quickly overtime; though they eventually do due to the organic (half-life) nature of OLED's. Yellowish-tint is rarely found. However, blue-tint is more apparent on displays with this degree of Mura Effect.
[Note: Yellowish tint is not the result of glue (common in LCDs); the Yellow tint is a calibration issue, and though sometimes kernel / software updates may resolve the issue, the yellow tint is not completely gone].
My ultimate question is, does the kind of Mura Effect on the AMOLED screen on each Note 2 unit manufacture thus far determine the life expectancy of the display itself? What about the formation of dead pixels? Do dead pixels (due to low-voltage effect) form frequently depending on the extent of Mura Effect on our displays? If my display for instance has black lines / blotches / dots, does that increase my chances of living with a dud phone?

Re: How Does Mura Effect Affect AMOLED Displays In Terms of Life Expectancy?
My guess would be, that by the time the mural effects the screen negatively (if at all) you will have moved on to a different phone. As opposed to a TV which is expensive and you'll be keeping it for way longer than a phone.
That's just my 2.cents
Sent from my SGH-T889

Similarly explained in the following thread from last week,
http://forum.xda-developers.com/showthread.php?p=36908128
The AMOLED Displays use an "Active-Matrix" compared to standard OLED's in today's flag ship televisions which do not have an Active Matrix.
In AMOLED, as a result of continuous low voltage that is being fed into OLED via the TFT even in the lowest brightness, the blacks won't be necessarily black.
Every Note 2 has the Mura Effect like in previous Galaxy Devices. However, the manufacturing process has slightly improved, but not to the extent we all would like it to be.
Unfortunately, I don't consider our displays to feature local dimming, because individual pixels do not actually turn off. Blacks are not blacks, as a result of the varying voltage.
Although there are improvements to the AMOLED display as explained here,
http://www.ignisinnovation.com/technology/ignis-technology-overview/ignis-admo-p-technology
Unfortunately, even though the solution provided in the above link by ignisinnovation has been in the market for a couple of years already, Samsung does not employ these kind of standards, therefore every AMOLED display has the Mura effect but in varying degrees such as in the form of stains, lines, blobs, dots, and splothces. This can also affect the display output when it comes to uniformity because the TFT is solely responsible for the luminescence of individual sub-pixels on the OLED film.
The AMOLED displays are improved with compensation.
http://www.youtube.com/watch?v=ctA114zaY98
When I say manufacturing has gotten better, I meant that Samsung's method of making slightly better AMOLED displays has been accomplished by changing the voltage and better quality control handling.
The material has been slightly improved; the material used on today's AMOLED displays is purer than let's say the material that was used on the S2 and Note 1.
Let's hope that future AMOLED displays by Samsung will be free of Mura and other Quality Defects.

Compesation for a Relaxed Area,
http://www.youtube.com/watch?v=tFgo6CIZgmo

I've noticed that the screen on my N2 is MUCH better than the screen on my old GS2. That phone had blotches galore, and my N2 only has 2 small, barely noticeable blotches. Better manufacturing & QC is pretty clear by the quality improvement.

That's very agreeable. However, a few Note 2 users have also reported severe blotches on their displays.
What has improved is the number of devices that have left the Samsung Factories with those type of displays.
They are far fewer screens on the Note 2 that have severe Mura compared its older sibling, the Galaxy S2. :good:
kabuk1 said:
I've noticed that the screen on my N2 is MUCH better than the screen on my old GS2. That phone had blotches galore, and my N2 only has 2 small, barely noticeable blotches. Better manufacturing & QC is pretty clear by the quality improvement.
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Is this mura the reason i see some color around black text on white background. Kinda makes the text hazy sort of speak. I assume some displays if put together right wont have this issue. Compared to my s3 which has sharper lines so I find reading on it much better on the eyes. Also my note 2 screen has a warmer tint (even when screen set to standard) vs my s3 which is more cooler.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

What you are describing is completely isolated, and the tint varies from display to display. Because the AMOLED display involves an organic layer, you won't find each display appearing the same, although, white should be white, and when there is too much tint like yellow and pink, then your best option is to get the screen replaced.
aznmode said:
Is this mura the reason i see some color around black text on white background. Kinda makes the text hazy sort of speak. I assume some displays if put together right wont have this issue. Compared to my s3 which has sharper lines so I find reading on it much better on the eyes. Also my note 2 screen has a warmer tint (even when screen set to standard) vs my s3 which is more cooler.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
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winlinmac001 said:
What you are describing is completely isolated, and the tint varies from display to display. Because the AMOLED display involves an organic layer, you won't find each display appearing the same, although, white should be white, and when there is too much tint like yellow and pink, then your best option is to get the screen replaced.
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Click to collapse
Thanks for the info.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

S4
My note 2 shows a greyish background in a black wallpaper in the dark but my friends galaxy s4 doesn't. Does it mean the s4 doesn't have mura effect?

I have no idea what you guys said.. But does that mean if I keep my screen on lowest brightness setting, I'll kill my screen faster? And I was wondering what those bloches were. I thought water got in it or something,

How do you see those blotches and other indication of Mura effect? Can it be seen using screen test? My screen seems to be fine after running screen test though.

For me, ,it is when I'm watching YouTube and the screen is black for any possible reason. Then I see some spots that are darker . Try to load a black picture and loom closely.
Sent from my SGH-T889 using xda app-developers app

to test this get into a dark room like 100% black or under a blanket and open a black image

Is this mura effect the same thing that the note1 had? The darker pixels? Because if thats it ive yet to find one on my note2
Sent from my SGH-T889 using xda app-developers app

This is pretty interesting information, has anyone had such a problem with it that they tried to claim it under warranty? Or does anybody know if something like this or even "burn-in" would be covered by warranty, and has anyone actually tried yet? The reason I'm asking is because I had no clue that burn-in was possible on Amoled screens (this is only the second device I've owned with one), so I found out the hard way by using an alarm clock app every night at first, and it actually burned in the digits in less than a week. I tried using some dead pixel fixer apps which didn't do anything (even though I knew it was going to be pointless), so I still can see the burn in on almost every white or blue screen. I've considered trying to file a warranty claim but I honestly don't know if they would even do it or not, so I just thought I'd see if anyone else has tried. The worst case scenario is that I have insurance so I could just make a claim, but I'd rather not pay the deductible if I don't have to. It's also not extremely bad because I have to point it out or most people don't even recognize it even if they've been using my phone, but the point is that I know it's there. Anyway I'd appreciate some feedback from anyone with the same problem on what you've tried. Thanks.
Sent from the bag phone in my Pontiac Fierro

Wow then I have horse shoes up my ass cause I've never had any of these issues even on the lowest light settings my phone looks perfect and I had no issues with my s3 as well
Sent from my SGH-T889V

Keeping your AMOLED Display at lowest brightness will help prolong the panels' life. Avoiding blue colors is wise; as the blue colors in any AMOLED display are susceptible to easy burn-in due to its poor engineering. Howeverm the Galaxy S4's blue pixels are more susceptible to burn in (due to its Pentile Matrix) than the Note 2's. (which uses a real RGB stripe) Both models sport different AMOLED panel technology. The Galaxy S4 will has Mura Effect too (Check out the respective forums; its a shock). Samsung doesn't seem to realize that solutions are there, instead the company hides the problems under a rug.

I have had 3 AMOLED Galaxy S family phones, and used root apps at night to lower by brightness past what stock lets you go, and I have never see any inconsistencies in my screens, even at 1% you can still see every pixel.... I must have got lucky to have screens that were in perfect alignment lol... :highfive:

I was wondering if mura could be white blotches as well? I have some uneven backlighting it seems on my S4 near the bottom right. I almost thought it was burn in. It's a lighter blotch that's only noticeable in the dark with a dark gray/black background up and it's in the form of a circle. It's not a "blotch" though and seems to not be apparent during actual "full black" backgrounds...
I wish I could capture a photo of it but it doesn't really show up on the photos I've attempted to take in the dark.

Mura Effect & AMOLED Displays (Note II)

Compesation for a Relaxed Area,
http://www.youtube.com/watch?v=tFgo6CIZgmo

I haven't noticed any such effects with the Note 2, but I did notice them on the Galaxy Nexus, when brightness was turned down 'below' what the factory minimum level was set to (20).

They still exist on all Note 2's in a form which appears less severe and is different from the one you observed in the Galaxy Nexus

winlinmac001 said:
They still exist on all Note 2's in a form which appears less severe and is different from the one you observed in the Galaxy Nexus
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The only screen "defect", if you will, that I've noticed on my note 2 is as described below:
When a pure black screen is displayed and it is observed in a completely black room, there is a noticeable red glow emitted from the screen itself. Like the red sub-pixels doesn't turn off completely or something. The brightness contol affects the brightness of the prominent red glow.
Not really an annoyance, and I rarely even care, I just wonder why. I figure if the blacks completely shut off the sub-pixels, It would save battery power (a negligible amount)
I compared this same scenario on a Nexus S that my sister has, and her screen is completely black compared to mine (which glows red).
I just thought I'd make a comment on the subject matter.

hiii,
i bought my note 2 on 29-1-2013
now what i noticed in my screen,
there middle 10% part is shaded with 1% opacity,
if we look closely then it's not noticable as u seen from far,
from naked eyes is too difficult to see,
its not like Colours are gone, only looks like shade,
if i increase brightness to 100% then the small shade like finish.
i m confused that it is defected or not,
is that Normal, does nay body heard that type of case,
Please make me happy,tell me that it is Normal,I dont wana give my phone to bad service guys. :crying:

vebulous said:
The only screen "defect", if you will, that I've noticed on my note 2 is as described below:
When a pure black screen is displayed and it is observed in a completely black room, there is a noticeable red glow emitted from the screen itself. Like the red sub-pixels doesn't turn off completely or something. The brightness contol affects the brightness of the prominent red glow.
Not really an annoyance, and I rarely even care, I just wonder why. I figure if the blacks completely shut off the sub-pixels, It would save battery power (a negligible amount)
I compared this same scenario on a Nexus S that my sister has, and her screen is completely black compared to mine (which glows red).
I just thought I'd make a comment on the subject matter.
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Thats normal on the Note2, between the Galaxy S/S2/Note1 the note 2 has the 'brightest' blacks while the S1 has the dimmest and they dont really shut off.

I have these dots and lines on my note 2, galaxy s3 (changed 5 times and all of them had it) and my galaxy s plus
Sent from my GT-N7100 using Tapatalk 2

lopman said:
I have these dots and lines on my note 2, galaxy s3 (changed 5 times and all of them had it) and my galaxy s plus
Sent from my GT-N7100 using Tapatalk 2
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Had dots on my Galaxy S2, dots and lines on my Note 1, dots/lines on my Tab 7.7
No dots/lines on my Galaxy S and Note 2

I've noticed that the black levels have changed over the last couple of Galaxy-line generations. I never saw anything significant with the Galaxy S, but that was because the blacks were more dark. Moving further into the subsequent years, the blacks began showing the Mura Effect very prominently. Every AMOLED display will have its quality variations. The units that do have the "noticeable" Mura Effect may even survive longer than the units that do have Mura Effect, but without lines, dots, and other artifacts. Its a give or take; if you buy a new AMOLED unit today, you will definitely come across some artifacts, especially dots. Each display manufactured requires special attention in order to perfect the manufacturing process, but this almost never happens in Samsung's assembly line, only because AMOLED technology is a very delicate piece of hardware.

hi.. i have an international SGN2 with normal super AMOLED display which is too much in contrast. if you want to have a crystal clear display why not choose true hd ips screen?
sorry my english..

Many don't choose the True HD IPS screen because many have the misconception that AMOLED displays provide a better color gamut, therefore a providing richer colors, accurate RGB, and premium experience. However, this is no longer necessarily the case. True HD IPS Displays have come a long way and are now thought to be leading the way for mobile displays. AMOLED is not the same as true OLED which provides deeper blacks and bright whites. Even though in an AMOLED display, individual pixels do turn off in the presence of black, the active matrix leaves the transistor film actively on. That's where the term Active-Matrix comes from. So much for AMOLED. It is speculation that Samsung may use SLCD's on their Samsung Galaxy S4 this year, according to a recent article on GSMArena.
rymote said:
hi.. i have an international SGN2 with normal super AMOLED display which is too much in contrast. if you want to have a crystal clear display why not choose true hd ips screen?
sorry my english..
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winlinmac001 said:
Many don't choose the True HD IPS screen because many have the misconception that AMOLED displays provide a better color gamut, therefore a providing richer colors, accurate RGB, and premium experience. However, this is no longer necessarily the case. True HD IPS Displays have come a long way and are now thought to be leading the way for mobile displays. AMOLED is not the same as true OLED which provides deeper blacks and bright whites. Even though in an AMOLED display, individual pixels do turn off in the presence of black, the active matrix leaves the transistor film actively on. That's where the term Active-Matrix comes from. So much for AMOLED. It is speculation that Samsung may use SLCD's on their Samsung Galaxy S4 this year, according to a recent article on GSMArena.
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Id prefer sammy go back to LCD's and develop it further, AMOLED just has way to many uniformity issues for those who are not lucky. If sammy can produce a 'backlight bleeding free' SLCD then Im sold, as long as theres a way to increase the color saturation

Is s4 has this kind of issue too? Like mura effect..? I think s4 has too...
Sent from my GT-I9500 using xda app-developers app

Sorry for bumping this thread into 2014, speaking of the Note 4, Samsung seems to have done some interesting software mods, but the hardware is still relatively same behavior when you test the displays using Supercurio's app. It's gruesome to know, but I've been with the AMOELD family since 2011. Have you moved up to the Note 4, EarlZ?
EarlZ said:
Id prefer sammy go back to LCD's and develop it further, AMOLED just has way to many uniformity issues for those who are not lucky. If sammy can produce a 'backlight bleeding free' SLCD then Im sold, as long as theres a way to increase the color saturation
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winlinmac001 said:
Sorry for bumping this thread into 2014, speaking of the Note 4, Samsung seems to have done some interesting software mods, but the hardware is still relatively same behavior when you test the displays using Supercurio's app. It's gruesome to know, but I've been with the AMOELD family since 2011. Have you moved up to the Note 4, EarlZ?
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Nope, I did get the Note 3 for my 24 month contract. Same old issues exist black is still problematic (no more black crush though) as you can see white spots the screen if its not displaying something that is totally black.

These AMOLED panels are still in its infantile state, but more like it its pre-teen years undergoing puberty. I'd give it a couple more years for the technology to fully mature.
EarlZ said:
Nope, I did get the Note 3 for my 24 month contract. Same old issues exist black is still problematic (no more black crush though) as you can see white spots the screen if its not displaying something that is totally black.
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Samsung's "solution" to mura

SO ive figured this out a while back but never got the chance to post it.
If you put our note 2 beside a different galaxy series phone(anything older than s3) you'll notice that they display a darker black in a completely black environment, but our phone also has significant to no mura present.
This lead me to thinking, why wont our phone display black? It took a while but i realized that it isnt the oleds that are defective, but rather the TFT behind them cannot be 100% pure(meaning, it cannot be 100% of a certain material) and for that reason some of it could not operate under a certain voltage.
So how is samsung fixing this? Well, they make it so that in the darkest environments, the oleds always get a certain voltage, which results in black not being 100% black(still better than lcds, but we no longer get "infinite contrast"
just putting this out there, if anyone was ever curious.

Hmm very interesting indeed. I thought Note 2 had a different kind of Screen technology out of the whole galaxy series? Would that be a reason as well?

G1Master said:
Hmm very interesting indeed. I thought Note 2 had a different kind of Screen technology out of the whole galaxy series? Would that be a reason as well?
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well, the note 2 uses a new kind of pixel arrangement, so it is full RGB like the phones before nexus/s2, but that doesnt really have much to do with this...it's still based off TFT

winlinmac001 said:
Similarly explained in the following thread from last week,
http://forum.xda-developers.com/showthread.php?p=36908128
The AMOLED Displays use an "Active-Matrix" compared to standard OLED's in today's flag ship televisions which do not have an Active Matrix.
In AMOLED, as a result of continuous low voltage that is being fed into OLED via the TFT even in the lowest brightness, the blacks won't be necessarily black.
Every Note 2 has the Mura Effect like in previous Galaxy Devices. However, the manufacturing process has slightly improved, but not to the extent we all would like it to be.
Unfortunately, I don't consider our displays to feature local dimming, because individual pixels do not actually turn off. Blacks are not blacks, as a result of the varying voltage.
Although there are improvements to the AMOLED display as explained here,
http://www.ignisinnovation.com/technology/ignis-technology-overview/ignis-admo-p-technology
Unfortunately, even though the solution provided in the above link by ignisinnovation has been in the market for a couple of years already, Samsung does not employ these kind of standards, therefore every AMOLED display has the Mura effect but in varying degrees such as in the form of stains, lines, blobs, dots, and splothces. This can also affect the display output when it comes to uniformity because the TFT is solely responsible for the luminescence of individual sub-pixels on the OLED film.
You can also refer to this, http://www.freepatentsonline.com/y2010/0277400.html
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its not the manufacturing process that improved
thing is, when the material sint pure enough, some parts of the thin film transistor will not be able to transmit enough power, while others can
this results in some oled getting enough voltage to display say..gray while others display complete black
what happens is that sammy upped the voltages, so the black is now an uniform gray
edit: btw..there is no correction of aging for oled display
only compensation..and tbh witht he direction oleds are going its really not necessary...in the next 10years we should be able to print it off our printer..so it'll be pretty disposable

Quality has improved though.
Right, there is only compensation, slipped my mind, with the same article I posted above, the AMOLED displays are improved with compensation.
http://www.youtube.com/watch?v=ctA114zaY98
When I mentioned manufacturing, I meant that Samsung's method of making slightly better AMOLED displays has been accomplished by changing the voltage and better quality control handling.
The material has been slightly improved; the material used on today's AMOLED displays is purer than let's say the material that was used on the S2 and Note 1.
AznDud333 said:
its not the manufacturing process that improved
thing is, when the material sint pure enough, some parts of the thin film transistor will not be able to transmit enough power, while others can
this results in some oled getting enough voltage to display say..gray while others display complete black
what happens is that sammy upped the voltages, so the black is now an uniform gray
edit: btw..there is no correction of aging for oled display
only compensation..and tbh witht he direction oleds are going its really not necessary...in the next 10years we should be able to print it off our printer..so it'll be pretty disposable
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---------- Post added at 07:20 AM ---------- Previous post was at 07:10 AM ----------
Compesation for a Relaxed Area,
http://www.youtube.com/watch?v=tFgo6CIZgmo

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