yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab 7.7 General] EarlZ:
Similar with mine, I've also posted a picture at the first page. What you can do is have it replaced, explain to them that you see rings in low light + low brightness usage in specific colors and there is one side that is darker which affects the image you see when you are watching animated films ( one side is darker ).

There is no assurance that you can get a better replacement unless the store would pre-test it for you. For the severity of your 'symptoms' I cant really say because a lot of people claim not to have a single issue but never bothered to perform the objective tests, all we have are subjective results which makes it harder to conclude on how hard it is to find non defective screens. Based on my personal testing I believe more than 97% of the screen out there have a darker side ( based on a 20 unit sample size )
[Galaxy Tab 7.7 General] moesom:
Yeah mines more the top right hand corner rather than a whole side but what about the rings? Has there been any models with no rings/dots/blobs reported?

Mines got blotchy/spotty blacks everywhere.. by no means is it any clear with gray15/25 in low light conditions, ill try get a picture later
[Galaxy Tab 7.7 General] EarlZ:
Some people claim they dont have rings/blobs/dots but they cannot provide pictures for whatever reasons, so its believed that they too have the same issue, A friend of mine also the same problem but his rings/blobs/dots are only visible on a totally black image, which in my opinion is very acceptable, but he does have discolorations on the side most of us.
[Galaxy Tab 7.7 General] moesom:
Yeah, I think I'll just live with it as it is very much usable and I tend to use higher brightness anyway so I would hardly ever see it... Think it's smarter if I go in and complain 1 month before warranty expires then I can maybe get a brand new replacement if lucky? Lol
[Galaxy Tab 7.7 General] EarlZ:
As long as you dont see it with your usage patterns dont bother with it, we all have different usage patters so YMMV, on my end its very visible 90% of the time and whats annoying is that with the store light conditions it was totally hidden.

11 months of using the device might be to late but it really depends on you, If you really intend to keep the device for long and can easily goto a service center I recommend you take a few replacements and settle if you get something that is better and have it replaced maybe 6-8 months from now, surely by that time quality control should go up, if the Galaxy S2 is of any indication.
[Galaxy Tab 7.7 General] Richdog:
Im really struggling to find these dark circles that everyone's talking about... would be happy to post photos as soon as I get a new camera very shortly. All I can find is the yellow discolouration.
[Galaxy Tab 7.7 General] EarlZ:
In that case your one of the few that do not have those circles.
[Galaxy Tab 7.7 General] TeeeJaay:
does anyone use this live wallpaper and confirm the color banding...

https://play.google.com/store/apps/...251bGwsMSwxLDEsImNvbS5teC5ib2tlaGx3cGZyZWUiXQ..
[Galaxy Tab 7.7 General] Richdog:
Im not saying there is no chance I have it, just that I cant see it under any of the situations i've tested in. Does anyone have a 100% surefire way to test... is it only a grey or black image and 0-33% brightness in a dark room? I tried it before bed last night, still couldn't see any rings. :confused:
[Galaxy Tab 7.7 General] questionmark:
After my first reply to this thread I though I was immune to these issues.....

BUT

That day I looked at further. This time in my bed, under the cover :)...by curiosity.

I have LCD-test app on the TAB and set the brightness in the tool to the lowest.

It starts with a black screen and some explanation...Fine so far, then red, green blue, white and BLACK...

When my eyes went from white to black ( again with the lowest brightness set in the tool ) at first the black were BLACK for about a second...Then my eyes adapted ... AND little by little I notice the screen glowing in a fluorescent way ( like a CRT when you switch off it glows for a few)...then at this point I started to notice

-uneven "patches" all over the place with different faint brightness

-AND 6 circles perfectly arranged in groups of 2 on the screen (3x2 in landscape 2x3 portrait )....

So believing I had not such circle I can tell for myself I confirm those sayings on my TAB. That also black is not black ( i thought it was). This can only be seen by your eyes at least mine(eyes) in full black screen in a pitch black environment.

As for burn in....

Well yes I do see now using lcd-test and screen filter setting at about 15 %, here I notice the status bar LINE boundary only (not the full solid status bar or battery etc) very very faint mainly in the BLUE screen and a bit less in the white once again in a pitch black environment. I don't see yellowish discoloration at the place of the status bar

So I concluded to myself what some people claims are indeed here on my tab as well but for me to see them I have to get really OUT of the "NORMAL" (mine) usage of the TAB (this was often mentioned anyway).

So to my best objectivity here...I'm not annoyed by it.... Unless it will become more and more visible through time...

IMO, the amazing contrast / color and beauty of the screen outweigh those problem as I cant see them in "normal/my usage pattern" conditions and surely I hope it to be the case for at least the expected life time of such device 2 years...though I know in 2 years I might have something else...

From the picture seen it seems some people can notice it / capturing it quite easily...not sure what camera they use and the exposition time on those picture. I now even more believe the claims of people that state they can see it in a relatively normal condition ....question is what is normal?
[Galaxy Tab 7.7 General] EarlZ:
1.5seconds exposure time for my grey screens and just auto mode on the settings menu and the shot from Osmos HD.

Any kind of usage is normal, there is nothing on the documentation that states other wise.
[Galaxy Tab 7.7 General] Richdog:
You know exactly what he meant and so did everyone else reading it. Normal usage is a term that covers normal conditions by with people will use the tablet. He can't see it under normal conditions, so his post was valid.
[Galaxy Tab 7.7 General] questionmark:
Interesting thread.... And so subjective... If I would not have seen those thread I would not have check this and after 3 weeks of usage would have noticed nothing... Now indeed the doubt is her for me to wonder how will it be in 6 month... Time will tell me hoping again for the best because I want to convince me oled is the future and will be... I don't see back light or led backlight as a future a personal opinion and bet here... And all the complains I'm sur will be addressed... I just saw couple hd movies on it, anim and 2001 space odyssey.. It is a total wow compare to anything I've seen so far and many people have same feeling the screen is in my opinion IS brilliant... I bought it because of that...

I truly appreciate people looking at these issues and complaining demanding better... So am I by confirming some issues.. These demands are the reason why we have this in our hands... Better..more efficient.. Ragardless IPS SAMOLED NOVA of what ever... Soon holographic or brain direct imaging, the ultimate :)

Now about normal, how about an IPS screen not to mention the device name... at the beach a suny day with polarized sun glasses, is that a normal usage? I don't have such device nor the sun in Holland :) though we have the beaches .. how would it perform how would the tab 7.7 Perform? Beach + sun + Polarized sun glasses + mobile device ARE normal... Though there is better thing to look at the beach:) So I would not do anyway... Now this said I verified the circle in my bed at night under the cover like a little boy all exited with his glowing device like a nice watch would do...

I'm very happy with what I have hopping it will last this way through its warranty time.

I surly defend the tab despite its problems I guess it is normal for most as we want to convince ourself we did not buy a piece of crap first place...

Cheers
[Galaxy Tab 7.7 General] DaveC1964:
There currently is NO perfect screen tech. LCD lasts the longest and doesn't burn-in but the blacks and response time isn't good. They can also have un even lighting due to the backlight light diffuser. OLED is great for those but wears out much sooner and has other issues. It just comes down to what defect you can live with.

FYI my tab has the rings too, and also on very dim settings the grey isn't perfectly even.
[Galaxy Tab 7.7 General] EarlZ:
I mostly use my Tab during night time, in my bed room with the lights off and brightness between 0~33% is this not considered normal?

I dont know about you but Im not looking for a perfect screen tech, just a very screen that is up to the quality control of its predecessors, like I've mentioned already I have a S8500 and Galaxy S, none of them suffer any of the issues listed aside from the burn-in, on my S8500 the AM/PM and signal bars are burned-in on my Galaxy S only the 'M' symbol on the AM/PM both devices are almost 2yrs old. No vertical/horizontal lines, no grainy greys or dirty grey rendering, no off white tones , no different shades of colors on edges. A perfect display in a quality control perspective.

And you are right, this device is not yet for me.
[Galaxy Tab 7.7 General] pikulu:
Earlz, man you are soo lucky! ! But thats not the same case with me :(

Here are my wave s8500 pic :

As you can see clock,signal,alarm,silent mode etc nearly everything is visible in the grey screen :D

Horizontal lines are darkly visible on the colours white,grey and more clearly visible on the blue colour that too set at max brightness :(

In short,i can clearly see the back picture of the screen :D, like the menu bars(got by dialing *#0*#) from which i tested the diming is clearly visible in the grey screen.

All photos are taken at MAX BRIGHTNESS.

There are no circles like 7.7 but a differnt square type of part is visible while switching off the phone.

Here my question is, Are the horizontal lines and clock,alarm,signal etc visible due to burn in 7.7?That too at max brightness?
[Galaxy Tab 7.7 General] EarlZ:
How old is your S8500 ?
[Galaxy Tab 7.7 General] pikulu:
Its around 1yr,how much yours?
[Galaxy Tab 7.7 General] EarlZ:
Gonna be 2yrs this june
[Galaxy Tab 7.7 General] pikulu:
So is these burn in issues like horizontal lines,clock,signal,nearly everythng that i see in my s8500 too present on 7.7?That too at max brightness?

I just love this tab but bcoz of these issues i cant buy my love :(

If these burn in issues are visible at lower brightness, than its okk for me bcoz i will be using this at max brightness for most of the time,but if this too visible at max brightness like my s8500,then i have to again think about the new ipad !

!
[Galaxy Tab 7.7 General] EarlZ:
It will be in the course of 1 year, but I believe less on the Tab7.7 as people are reporting as early as 2 weeks of burn in. I would believe its all luck of the draw.
[Galaxy Tab 7.7 General] pikulu:
Will i see the burn in like the status bar at maximum brightness?or is it only visible at lower brightness?
[Galaxy Tab 7.7 General] EarlZ:
I dont know, mine has no burn-in yet.
[Galaxy Tab 7.7 General] prinzhernan:
I really wanted the 7.7 but I couldn't bring myself to buy a defective unit. All 5 units I tried out today had dead pixels.
[Galaxy Tab 7.7 General] oneee:
I have hard to see details in dark areas when watching movies with galaxy 7.7 so i did black level test. 20 grey squares on a black background. I can only see

5 grey squares the rest is just black. I did the same test with galaxy s2 almost all grey squares was visible. heres som photos that i took you can test your tablet
[Galaxy Tab 7.7 General] questionmark:
Thanks for the test just checked the Web Page and have only problem with the first 4 gray (first row) starting to see them clearly at value 5. Maximum brightness and movie mode. If in dynamic I start to see clearly at value 7. What is your Mode?

Also looking at it in living room wih some light around an day light at 17h55 in the Netherlands. I went in the bathroom in relative dark place and I seems to gain 2 value. In any case I miss the first 3 the other depends on he embiant light and screen mode it seems. I would say first row is indeed hard to see...
[Galaxy Tab 7.7 General] questionmark:
I just checked using the screen adjuster from market were you can tweak some of the settings notably the contrast and it helps.. Note sure if this useful or if we face a calibration problem here from Samsung? I I'm not a specialist in this area.
[Galaxy Tab 7.7 General] EarlZ:
Nice find, i also see more squares on the galaxy s, s2 and note as compared to only 5 on the tab, though this has not made my videos any darker, what vid did you tesr on your tab that looked darker compared to the s2?
[Galaxy Tab 7.7 General] oneee:
The photo that you see was in movie mode with brightness at 0. at 100% brightness from number 1 first top grey to number 10 was completely dark. When comparing to galaxy s2 i dont think its very good calibratet. Black it just crush. Right now i am waiting for my replacement. I well be back with more photos with new tablet. Who knows maby this time with no rings :)

---------- Post added at 01:18 PM ---------- Previous post was at 12:45 PM ----------

I was watching falling skies s01e05 at 00:14 to 02:00 with the 7.7. I dont like having my tablet at Maximum brightness just to see details at night when watching movies. Galaxy s2 with dynamic mode and brightness at 0 has no problem see small details in dark areas. Anyone with good solution how to fix this please.
[Galaxy Tab 7.7 General] EarlZ:
I dont know of any solution yet, I dont have any movies yet with too much dark scenes.. I tried Avatar extended edition which is from a 1080p blueray source just ripped the scene where theres a lot of darkness and I did start to notice that the Tab7.7 crushes more shadow detail at even at 50% brightness compared to the S2.
[Galaxy Tab 7.7 General] EarlZ:
Got my first replacement today and its actually worse off from the one I initially had.. both sides are pretty dim and the middle is properly lit.
[Galaxy Tab 7.7 General] oneee:
Thats not good. How about the rings? I am still waitng for my third replacement....it has been like a week now... This time maybe they try to fix the problem. I didn't tell them about the black crash. The rings now for me is isnt a big problem. I think now i can leve with that. but the black crash is killing me more......well see .......
[Galaxy Tab 7.7 General] EarlZ:
Still the same 6 rings but its not visible with my regular use unless I play with Osmos HD, there the other splotches is very visible. For the black crush, I've been watching HouseMD lately and with this replacement I didnt need to push 15 brightness, just at 7 to see shadow details.
[Galaxy Tab 7.7 General] matt310:
This thread is very interesting and I appreciate that the tone hasn't become judgmental or degraded into attacks on peoples' expectations of technology.

I just purchased, exchanged and returned three 'new' iPads at Best Buy this week. The first one had at least two dozen dead pixels; the second had yellow banding and light leakage and the third had a pink/reddish tint to white screens. Unacceptable on any level and definitely makes me think Apple's QC has fallen off a cliff. Also doesn't give me a lot of confidence that the current sole supplier of the magical unicorn retina display - Samsung - has ironed out the 'first production batch' issues. Which frankly is ridiculous since Apple claims three million were sold during the launch weekend.

To EarlZ's remarks about the original Galaxy S - I had a Captivate (i897) and loved the screen. It was my first Super AMOLED device and I fell in love with the over-saturated colors and deep, rich black levels. When I replaced it with the SGSII (i777) I had to go through more than seven of them due to various screen issues including the grey banding problem mentioned frequently in this thread. I thought perhaps the '+' tech and non PenTile matrix was pushed to market and not properly tested, but lo and behold my eigth SGSII is and remains perfect and looks as such even in low light levels, and even on gray backgrounds. No IR or burn-in either.

So in the end I think it's just a crap shoot as to what you'll get in terms of screen quality. There's a 25-page-long thread on macrumors about various display issues with the new iPad. The resolution was outstanding - sure, but when I want a white screen, that doesn't mean pink or yellow-striped. I ended up buying a Galaxy Tab 8.9 from CL (after selling my Blackberry Playbook, which to its credit had a decent screen, but horrible black levels). The 8.9 uses, to the best of my knowledge, a PLS-TFT display, which is Samsung's version of IPS. Viewing angles are great but of course when I'm laying in bed looking at a letterboxed movie, there is some light bleed through the panel. No light leakage at the bezel, but still nowhere near as black as an AMOLED panel.

From the issues being reported here, I think I will keep the 8.9 for now and try the 7.7 in a couple months. My luck with technology has taken a nose-dive lately, and since I can't find any of them locally (in Los Angeles) that aren't littered with Verizon's horrible carrier branding, rolling the dice on an overseas purchase seems against the odds that I'll get one that meets my expectations.
[Galaxy Tab 7.7 General] EarlZ:
This is the main reason why Im holding back in getting an Ipad3, a lot of apple fanatics are even complaining over at macrumors.. Im not aware if the Ipad2 had such issues when it was launched buy all i know is that a lot of the Ipad2 launch units had a very warm colored screen.

And the Galaxy S was my foundation on what to expect from a SuperAMOLED screen, I was even intentionally looking for faults when I got my Galaxy S and found none, I only went through 3 Galaxy S2's and had a chance to select from 4 sealed units at the service center, giving me a total of 7 units but all of them had the yellow tint issue so I ended up returning the phone.

True, a lot of luck is required to get a 100% fault free screen on the SuperAMOLED line these days. Most of the screens probably fall under 'acceptable' quality but not as great as how it was. Its nice to see that some folks still know how a quality screen looks like and would not settle for anything less.

I like the Tab8.9 I would actually prefer that over the Tab7.7 but the no microSD slot and Tegra2 chipset is ticking me off. I just hope that samsung will release a full HD tablet soon with PLS.
[Galaxy Tab 7.7 General] matt310:
I must say the 16GB w/no external SD is a bit of a slap in the face on the 8.9; we'll see how long that lasts before it begins to drive me nuts. As far as the SoC, it's an APQ8060 Dual Core 1.5GHz Snapdragon since it's the AT&T LTE version; there was no way I was going to buy a Tegra2-equipped device in 2012. Aside from the normal disappointments of the Honeycomb UI in general, the tablet is fast and performs well.

Back to the AMOLED discussion, I have read that the Achilles heels of AMOLED panels are banding in low light, the inability to produce a uniform grey color, and the slight green/blue color shifting at off-angles views. My SGSII doesn't exhibit any of those issues, though it does have a cooler white balance - something I noticed (and which became visually jarring) on my third new iPad - the one with the pinkish screen. You'd think by now software manufacturers would include a color temperature calibration utility on their devices, which at the very least would mitigate some of the variances we've come to expect from mass-produced panels. The simple fact of the matter for me is this: The higher the price, the lower my tolerance is for imperfections. And knowing that there are "good" panels out there among the merely acceptable ones is a blessing and a curse, that's for sure.
[Galaxy Tab 7.7 General] EarlZ:
The Wave and Galaxy S2 didnt have any issues rendering greys, even the S2 didnt but thats where the other screen problems started to be very common. I guess you are right, its a trade for for lower price + higher mass produced volume. The premium price also commands a 'good' panel. The color shift on white when tilted seems to be a quality control issue as the replacement I have now seems to have no color shift on whites even at unusable angles.

For the Ipad3, I find it odd that its suffering a lot screen related issues especially the yellow/pink/green spots or the half screen tinting.
[Galaxy Tab 7.7 General] holyrabbit:
at my country doesn't have any information about exchange product.

i've got newton ring, yellow tint (above samsung logo..on grey wallpaper), screenburn (actually the screen burn at status bar, it's block-long-darker color than other place)

i already speak to the store where i buy it, but they say the must asking the principal (samsung it self) about exchange product, until now only replacement screen! and now i just wait the new information about replacement new product.

mine almost 3months

@earlz

how's your tab now? still problem with screen? nothing solution from Samsung about how to fix this problem?
[Galaxy Tab 7.7 General] EarlZ:
You should goto a service center instead of a store. Same issue with the replacement.
[Galaxy Tab 7.7 General] holyrabbit:
i just get another information, Samsung need to check my Tab for 1 week!!

and almost 100% there is no replacement with a new Tab, so sad :(

only replace the screen, which is my screen protector (anymode) will be remove *super Sob

what do you think sir, repair now or wait until a few months? i just buy this tab early Feb, and now already get 2 annoying things & also NR

huhu
[Galaxy Tab 7.7 General] prinzhernan:
They have to return the screen protector. I had my old tab fixed and they put in a new screen protector when they removed my old one.
[Galaxy Tab 7.7 General] EarlZ:
1 week seems like a very long time, I just processed my refund earlier and it didnt take the technician more than 5mins to examine my unit, he singed the papers about the issue and it will be forwarded to the local head office where the refund will be finalized and approved based on the technical report.
[Galaxy Tab 7.7 General] oneee:
I have been waiting for my 7.7 about 2 week now. When i did contact them to day they said that they were waiting for some parts to replace my screen with the new one without ring problems...hopefully i well have my 7.7 this week. I well be back with photos:)
[Galaxy Tab 7.7 General] jawil:
Today I finally got to see for myself how terrible the banding is with 16-bits graphics comapared to 24-bits. It's pretty clear that the banding on the S2/Galaxy Tab 7.7 is caused by applications using 16-bits rendering.

I downloaded a Live Wallpaper called Ice Cream Sandwich Live WP (I am not associated with this program or the guys making it) and immediately discovered heavy banding in the wallpaper on some of the backgrounds and heavy dithering on others. The wallpaper was great, apart from the banding/dithering. For example there was banding on the "phase beam"-style screen and dithering on the "standard"-style screen.

I decided to take a look at the settings, and found the option "Color Mode". This setting comes with a warning about problems with some devices. The default was set to 16 bit (565). I changed this to 24 bit (888) and re-started the screen-saver as told in the warning.

All of the banding was gone in an instant! Totally smooth colors. This little screen-saver shows what can be done with the S2 and the SAMOLED-screen when using 24-bits colors.

The LWP costs $1 or something, but you should be able to try this within the return-window. But it's woth the money anyway. Especially without the banding. The banding is even more visible on the Galaxy Tab 7.7 compared to the S2, because of the tab's larger screen.

Link: https://play.google.com/store/apps/details?id=com.tribok.android.livewallpaper.icswallpaper.pro