yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab 7.7 General] EarlZ:
Impossible to check for this quality issue at the store and might prove difficult to show at the service center unless they have a room where the lights can go off. A user from a local forum also reported that he has visible circles on his screen. I dont know how severe as he didnt post pictures but Im starting to believe all the tab7.7's suffer from this defect as we havent seen someone dispel our fears..
[Galaxy Tab 7.7 General] ThE_SoUrCe:
just a quick question,

are those imperfections noticeable under normal circumstances

IE, a not so dark room, under normal light conditions etc.

and is it also noticeable if you set the brightness to at least 20% or more?

please advise. I'm about to buy one to replace my existing tab 2 days from now. But those things worries me, selling point of this tablet over the other tabs is the screen, the SAMOLED PLUS screen, and if it's its greatest strength and weakness, then i'll stick to my old tab or get the 7.0+ for the dual core.. sigh.. =(
[Galaxy Tab 7.7 General] EarlZ:
If you are referring to the previous pictures posted then yes, it clearly shows the 3 of the images were taken with good lightning.

Id like to add that using the tablet in a bedroom with out any extra light source is pretty normal when reading ebooks or watching movies, I dont understand why it has to fall into a 'special' condition scenario.

My advise is, talk it out with the dealer and a near by service center on what their take on the issue is. My dealer told me that its upto the service center to sign off the papers for repalcement and service centers are very well lit.
[Galaxy Tab 7.7 General] randomgent:
The imperfections will disappear as you increase the screen brightness, for me it was around 15-25 percent of brightness for it to be invisible to my eye in a dark room. Yea i recommend this tablet, its fast, beautiful ,slim, long battery life, nice vibrant screen and highly portable. If you want to purchase it , you should probably buy it from a store that has good exchange or return policy just incase.
[Galaxy Tab 7.7 General] EarlZ:
Wait so if you display an all black screen then bump it up to 25% brightness the circles disappear?
[Galaxy Tab 7.7 General] randomgent:
Yea im very worried that the technician would simply wrote my tablet off as normal

True that ,when i said "dark room", i meant poorly lit bedroom where i still can see my hands and feets and also my surrounding, not photography darkroom.

---------- Post added at 04:40 PM ---------- Previous post was at 04:37 PM ----------

On a grey screen , yes but not sure on an all black screen, i cant really remember testing it on a black screen, sorry. I will try it once i get my tablet back, not sure when.
[Galaxy Tab 7.7 General] EarlZ:
I showed your photos to a local samsung tech support email and in their 'opinion' those are not normal and not acceptable but they forwarded the images to their head quarters to verify on how to go about with the warranty for this.

If in your end its visible in a poorly lit room then I would guess those rings are very very obvious, I do hope there are a few screens out there w/o those rings.

I would guess on the blacks they will remain at the same visibility from 0 to 100% brightness as SAMOLED's display blacks with the same 'brightness level' from 0 to 100. we could consider yours as the worse case scenario.
[Galaxy Tab 7.7 General] ThE_SoUrCe:
then it gave me a small fighting chance to reconsider it. thanks for the heads up, but as per Earlz post on our local forum, those nasty 'Crop Circles' are still existent no matter how you pump up the brightness,

was planning to at least give some of my friends, and myself as well, a feel of having a device that'll produce "floating" letters in pitch black darkness, guess that demo will never happen unless I get lucky and acquire a good unit.

I'm not so lucky when it comes to such kind of things though. If I recall correctly, I got my nokia 7710 before and it has a pale yellow "white" screen compared to a 'white/bluish white' LCD screen. My P1000 has a "purplish white" flash compared to a White LED flash or Bluish White LED light that other P1000 has, (i guess the purplish LED gave it an edge when rendering pics in low light conditions since the color are not too washed out compared to my brother's p1000 with white LED light)

oh well.

Galaxy note - smaller screen area ~ smaller Crop circles circles (I hope) and 8mpx Cam

Galaxy 7.7 - bigger screen area ~ bigger Crop circles (sigh) - standard 3.2 cam

make me think...
[Galaxy Tab 7.7 General] randomgent:
Thanks, i also sent an email to Samsung but they told me to simply sent it back before 30 day Early life failure which is irrelevant.Yea true my tablet is probably the worse case scenario. Im not trying to scare people off , just showing that there may be an issue that's all. For anyone who will getting the galaxy tab 7.7 , good luck to you all.
[Galaxy Tab 7.7 General] EarlZ:
If your from the local forum that Im in then I would guess you know that I've already returned my Galaxy Note and asked for a refund on an issue they cant fix. Anyway the 'floating' text on total darkness is not possible as blacks on the SAMOLED are a bit lit but they are supposed to be giving a uniform glow as per my Galaxy S, S8500 and S2.

Yes we understand but at least we are given the heads up that such issues do exist, this makes buying the Tab 7.7 even tougher. For now I'll hold off till I get an official response from the tech support team in my region. But I will get this tab some day as I really like the form factor and weight, wish they had a PLS version though.
[Galaxy Tab 7.7 General] ThE_SoUrCe:
Yep, thanks for the heads up, guess I have to somehow lower my expectations to this tablet - so as not to get too disappointed that my hard earned cash will be used on something that I will not enjoy. Since my p1000 is due for selling 2 days for now, I don't have ample time to decide on which one to get ( I was so focused on getting 7.7 a week ago before I even read the problems from our local boards, then just a few days ago, read it from here)

the pressure is on :D to get something within 2 days lol

BTW Earlz, I'm not really sure if we have a good return policy here in our country, I haven't returned anything that I purchased YET, all I know is that we have like a 7-day policy to return something in exchange of something else. Will our local stores agree to test a unit and will not oblige you to buy if some defect-that-will-not-affect-performance-and-usage comes up? I was planning to make a "dark room" rig to test those Crop circles, better for me to have some people raise some eye brow rather than get an expensive unit that I will not enjoy. deym, I can buy an 88model nissan sentra sedan for that price LOL
[Galaxy Tab 7.7 General] EarlZ:
I've asked for a refund for my Galaxy S2 and Galaxy Note from Samsung via Email and they dont really trouble you too much about it as long as the issue is valid and easily reproduceable on their end.

A lot of local stores here in cebu allow testing w/o the the commitment of purchase, only 2 out of the 8 stores I've checked with dont allow testing unless purchase is done.

To me this the circles are not a "defect-that-will-not-affect-performance-and-usage" its gonna affect my usage alot as it is very annoying when reading ebooks but I rarely do that though Im more into movies and web browsing.

Can you share your idea on that dark room rig, I really need a way to test this issue at the store before purchasing.
[Galaxy Tab 7.7 General] ThE_SoUrCe:
I hope they have the same thing here in Manila. Ill have it tried, better to get on those legit/big stores like Samsung outlets or those with names.

the rig is just a simple collapsible black/thick paper bag with cover wherein the tab can lay flat at the bottom while the cover is composed of thick black blanket material ala old school camera where you have to place your entire head inside sheet - and yes, the tech needs to put his head inside to see it, which seems to be awkward. but better be safe than sorry
[Galaxy Tab 7.7 General] EarlZ:
That could work, or just a big thick black cloth to cover the entire area.
[Galaxy Tab 7.7 General] ThE_SoUrCe:
^simpler but better.

guess I'll try to talk to their manager first before opening a unit, I'll ask him If we can have it fully tested before I purchase it and if they're willing to open another one until we get a decent screen. I'm not sure if the manager will agree though
[Galaxy Tab 7.7 General] EarlZ:
If there is a service center near by its also best to talk about them with the issue first, here in SM City Cebu theres a service center inside the mall and I plan to do just.

Does anyone know where to find the build date on the Tab7.7 ?
[Galaxy Tab 7.7 General] tboy2000:
ok I think I may get the 8.9 tab now. At least I wont have to worry about burn in or circles on a non oled screen. Such a shame. 7.7 was my ideal tablet. If only samsung would acknowledge the problem and either do a product recall or release a statement that they will fix the issue somehow.
[Galaxy Tab 7.7 General] sky|ined:
"Crop circles" :D on my P6810 as well, when I use "screen filter" from the market to dim the brightness for late night browsing purposes I notice that the top half of the screen in portrait mode is darker than the bottom half, and I also get 6 small white circles/dots right at bottom of the screen when on black background, e.g. when watching a video or reading an ebook, this last deffect is orientation dependent so it's not an actual screen fault, I guess.

Probably sending this back for a refund.
[Galaxy Tab 7.7 General] EarlZ:
Is it only visible if you use the screen filter?
[Galaxy Tab 7.7 General] sky|ined:
Also visible with "screen test" on grey background, no screen filter enabled. Judging by the posts here on xda under various device's threads quite a few super amoled screens seem to suffer at low brightness settings and it's a little suspicious that default minimum brightness is set rather high.

Anyone else seen/heard anything about those white spots/circles/dots I mention at my previous post?
[Galaxy Tab 7.7 General] EarlZ:
Those circles that you mentioned is the current topic discussion heading on this thread, back read a few pages. Everyone seems to have them sadly.
[Galaxy Tab 7.7 General] randomgent:
Well on my tablet there are dark circles instead of white, yea the default minimum brightness is pretty high, as high as my iphone 3g at 1/5 brightness.
[Galaxy Tab 7.7 General] EarlZ:
Odd, In all of the Tab7.7's I've tested minimum brightness is pretty dim compared to a Galaxy S2 or a Galaxy Note... Maybe theres an engineering revision somewhere?
[Galaxy Tab 7.7 General] sky|ined:
I was refering to small white dots/points (not circles, wrong choise of word) at the very bottom of the screen that follow the screen's orientation, i.e. they are located always at the bottom of the screen no matter which way I hold the device. Anyway I solved the mystery my self, it's honeycomb's status bar not being properly hidden by the full screen mode of certain applications.

As for the minimum brightness my note is slightly brighter than the 7.7 on minimum brightness but they are both still pretty bright I reckon, thus I have to use "screen filter" app to further dim the devices for night time browsing. Using this application eveals further imperfections of the super amoled screen, give it a try.
[Galaxy Tab 7.7 General] EarlZ:
For the note I use about 15% brightness when watching movies so I guess thats ok with me. For those dots yes thats how the status bar tries to 'hide' it self showing only dots. Any imperfections visible with screen filter app is something that I wont complain since that is already going beyond specifications.
[Galaxy Tab 7.7 General] sky|ined:
grey background on "screen test" will show the same thing, maybe to a lesser extend. Basically what you see is an unevenly lit screen, those variations become for the most part invisible at normal settings as set by the manufacturer so you are right that they are out of specification, but that makes me wonder why minimum brightness is set kind of high. And I was unable to reproduce such an effect with LCD screen. Just saying..
[Galaxy Tab 7.7 General] EarlZ:
This screen test you mention is this the images posted on the first page or a dialer code on the tab?
[Galaxy Tab 7.7 General] sky|ined:
It's an android market application, and "screen filter" is another one. Try them at the same time ;)
[Galaxy Tab 7.7 General] murgo:
i thought my display was pretty good.. after using screen filter i realised it was only wishful thinking. the circles are only visible though when i set the brightness to the lowest level and use screen filter at about 14%.

i'll have to see if i'll actually notice them during normal use. what bothers me a lot more is the uneven screen. the lower half seems a lot more yellow. it's visible on the keyboard or when looking at white or grey content at low brightness. when i dial up the brightness to full, it's barely visible anymore, but i don't intend to keep it that high all the time :(

guess it's going back soon :'( btw, it's a 6810 wifi only from austria.

i'm sad.
[Galaxy Tab 7.7 General] EarlZ:
Are the circle visibles even if you dont go into a dark room? Because this might be a good method to test with store light conditions and yes I've seen maybe 1 or 2 7.7's with yellowish/darker bottoms.
[Galaxy Tab 7.7 General] murgo:
no, they're only visible when i'm in a pitch black room and turn both the brightness and screenfilter percentage down.

i just tried screen filter and lcd test on my sgs2.. and holy ****: when choosing a grey background, i can basically see all the keyboard buttons, the clock in the upper right and a lot of other burn-ins. and if i strain my eyes i think i can also see a couple of circles as well. i've NEVER noticed this in the 7 months since i've got the phone.

edit: i retract my pitch black room statement. i can see the circles very clearly now in bed with the lights on. i'm reading pdfs in repligo and the circles show up in the grey background. the lower half of the screen is also noticably darker. definitely not good.
[Galaxy Tab 7.7 General] EarlZ:
Checked out a total of 3 units from 2 different stores today and all 3 had different obvious screen issues.

First Unit - Had a very obvious darker top (1") and a darker bottom (2") very obvious on the stock keyboard and when you are viewing anything with grey content like the market or the stock web browser.

Second Unit - It seemed like a perfect screen, very clean and uniform grey renderings but upon pulling up the screen test and choosing green, I see some wave lines that looks like flickering which was also confirmed by the samsung rep.

Third Unit - From another store, half of the screen shows visible horizontal and vertical lines when rendering greys

So I returned home with mixed feelings, happy that I didnt just settle for it and a bit sad since I didnt return a 7.7 home with me.

EDIT:

Despite the very good store lighting these issues were easily spotted which means with 'normal' lighting or total darkness those screens will look horrible.

I tried to key in the S/N at samfirmwares but I cannot get a build date.. Im guessing those are 2012's
[Galaxy Tab 7.7 General] earthman5678:
Just got my tab back. They replaced the whole screen assembly including the glass. No more yellow tint for now. If it happen again, I'll just live with it. Time to start enjoying it rather than keep sending it back.
[Galaxy Tab 7.7 General] EarlZ:
After checking out and screening a total of 15 units from different stores and different dates, I've managed to see only 2 units with 'acceptable' screens. I say acceptable because I am expecting the grey rendering to be as good as on the Galaxy S and S8500. I will be getting one tomorrow but it still has a visible darker top part and lighter bottom when rendering greys.

The very common issue I've seen is a visible thick vertical/horizontal lines on the screen when rendering greys and either a yellowish or greenish discoloration at the bottom and some reddish bleeding on the edges ( mostly top ) I dont think a screen that can render greys on the Tab7.7 exists for now but Im sure it will be possible 6-8 months down the road when screen production gets better.

Different shades of greys are my objective way of testing the screen quality as it easily cuts down the time needed to do so, if a certain screen passes my objective test I goto the subjective test, Load up Thumbkeyboard and use the split lay out with the ICS theme and observe if the shades on the letters from Q to P are the same, some screens that fail the objective test actually produce good results on the subjective test, while others really give out a very obvious discoloration, also all of my tests are done with 0% brightness since thats the brightness i will be using 90% of the time, as the brightness ramps up these discolorations become less obvious.
[Galaxy Tab 7.7 General] Richdog:
For my part, I think I will just send the Tablet back for repair in 6-8 months then when things improve. No real skin of my nose, and thats what the warranty is for after all. :)
[Galaxy Tab 7.7 General] EarlZ:
I wish they would start to use lesser grey colors, at least we can mod the status bar to black.. I would very much like to have a black colored web browser rather than the grey colors they are using.
[Galaxy Tab 7.7 General] ThE_SoUrCe:
plenty of applications are using grey color, but only a few has a hue that will bring out the nasty circles and blood splatter looking smudges, since I'm also trying to take care of my screen, I'm using a back wallpaper both for lock screen and wall paper, I also rotate my every now and then. But if burn in issues still arise with that kind of "care" then it's a total product failure for normal usage (how in the world will I able to use GPS for several hours if it'll burn-in in my screen :( )
[Galaxy Tab 7.7 General] Richdog:
I also use a pure black screen for home and lock screens. Time will see how burn in affects it.
[Galaxy Tab 7.7 General] mailings:
One week with the tablet, and I have screen burn-in.

To be fair I have seen it while using screen filter app, but really makes me wonder how the screen will look in a year....
[Galaxy Tab 7.7 General] TML1504:
hi, "nice" to see you here too :D

i own a 7.7 since yesterday, and with my experience from the note (you know what i mean) i am either totally lucky, or the 7.7 screens are better then the ones from the note!

my grey looks WAY better and even, also the blacklevel is much deeper! what i have is a slightly darker top-part (as you describe), the rest seems to be fine (i will give detailed feedback in a few days, but for now i didn't find any flaws like on the note, at least i didn't noticed them for now)!
[Galaxy Tab 7.7 General] EarlZ:
From the 15 store units I've seen there were units with similar screen issues with the note but not really that severe even compared to the worse that I've seen between both devices. The darker top seems and lighter bottom seems to be on every Tab7.7 on greys once the brightness is at low. Despite that I'm very pleased with the Tab7.7 screen so far.
[Galaxy Tab 7.7 General] ThE_SoUrCe:
best thing to do is to gather up and bombard samsung to produce a decent screen that will support our tablets.
[Galaxy Tab 7.7 General] golfinggino:
you guys make me laugh - i wise old man once told me that if you look at something long enough you will eventually find problems with it - i currently have both the note and the galaxy tab 7.7, the note has a good screen and the 7.7 has the best screen you can buy today - these devices are really cheap and i will buy another new and better one in a few months from now so why all the complaining just enjoy it until something better comes out
[Galaxy Tab 7.7 General] DaveC1964:
Grey will still burn in as it has blue as a component color. I would like to see colors without blue when used for static images.

Using blue for the always on battery indicator and wifi is just plain retarded, Sammy. You guys made the screen, you should know better.
[Galaxy Tab 7.7 General] ThE_SoUrCe:
It can be cheap for you but not for all - we are indeed enjoying it, in fact, it's eally mind blowing that I will not step back to LCD lit displays, if ever samsung made a new, better model with a much better screen then count me in as one of the buyers, but for now, you can't even use it the way you should without having burn in issues, who would like to browse on a whit page with burn in GPS marks floating at the center of your screen wouldn't that annoy the average user. paying for a premium then getting a screen that will 'malfunction' in a few weeks?
[Galaxy Tab 7.7 General] brianleston:
Screen Issue

Bought my 7.7 3 weeks ago in Thailand

Screen appeared ok and i did'nt see any rings or shading or burn in. Overall it looked good.

However, it went into local Samsung service center last week as when scrolling up, the bottom line of the screen was lifting and breaking up. Like pulling a expanding blue tape. [sorry about the discription] At first it was barely noticeable and I thought I might live with it, but it developed quickly so that it happened in landscape mode and top and sides of the screen as well.

When I showed it the woman in the service center she immediately said ''oh its problem with touch screen, the engineer will send it back and you will get a new one next week"

Big disappointment really. I only stay with Samsung as they have a local service centre.
[Galaxy Tab 7.7 General] TML1504:
ok, so on very low brightness (bright. sett. minimum, then nightmode in custom mode with 140/0/0 (RGB)) which I use for night-reading I see a LOT of rings all over the display, seems like the suction cup issue back of SGS2 times...

As I have seen only one 7.7 so far I'm not able to compare, but ATM I tend to keep this device because there are almost no other screen errors (except the darker top)!
[Galaxy Tab 7.7 General] EarlZ:
Like what was said on the Galaxy Note forums, its actually sad that we have to shuffle through a few devices just to get something with in specifications.

The suction cup rings affect all Galaxy Tab7.7's this is something that I am very certain unless someone cares to disprove me with really convincing proof.

Yes, it is the screen with least issues so far. Better than the Galaxy Note, altho I miss how crisp the text is on the Galaxy Note compared to the Tab7.7 but supercurio did mention on his tweet that its actually a rendering issue about a subpixel lighting up when not needed. I hope he can fix us some work around soon.

I've also read reports that the bottom right of the screen seems to dislodge, so Im guessing this is not a very isolated issue, rare but not isolated.

Despite the many replacements I had with the Galaxy S2(7) Galaxy Note (1) I still gave samsung a chance, aside from having a local and accessible service center, they are not a total a$$ when it comes to customer service when you really need it, altho the quality control on the actual products really needs work. I refuse to believe that a 'majority' of the units produce dont have screen related issues, but a majority of the users barely care about the screen.

For my video playback needs the Tab7.7 is just awesome, it blows everything away that I've used so far!! Out side from that department its mixed feelings. Still I got the device anyway.
[Galaxy Tab 7.7 General] randomgent:
Received my repaired galaxy tab 7.7 2 days ago,the screen still has the circle marks but its only visible when i use screen filter + lowest brightness.At lowest brightness , its fine unlike the old one where the circle marks is visible at lowest brightness.Kinda disappointing but ah well.
[Galaxy Tab 7.7 General] EarlZ:
Depending on whats displayed on the screen I can see the visible circle marks even if its not in a totally dark room, example on the setup menu I can see 2 circles and with the stock 'holo spiral' live wallpaper I see all 6.. and my light source is from my computer monitor.. never saw this at the store :(