It is a common belief that SAMOLED has no backlight, which is true. However, the screen IS powered and hence there is SOME energy that generates a teeny tiny amount of light.
This can be checked by using the *#0*# and doing the Vibration test where the screen goes totally black.
I'm talking about a VERY VERY faint and very uniform glow from the screen.
Try waving it in front of your face if you don't see it.
Report back.
Hi,
Yes. Even I have noticed this when I am using the cell in night and in a completely dark room. I am not sure about the SGS 1'S screen, but in the S2 I have seen a very faint glow which is present in the backs even when there are other elements colors present on the screen. It's my opinion that there is some amount of backlight that is being used for the black.
Sent from my GT-I9100 using xda premium
Both the i9000 and i9100 have a faint glow when nothing is being shown on the screen
I havent seen any glow just how "teeny tiny" are we talking about here?? If you keep reasonable distance from the screen then it is perfectly black. Watching a video with black bars in a completely dark room the blacks are literally indistinguishable from the bezel.
so far i had 3 galaxy sII devices the last one was the white color
all of them had the same thing ur talking about in complete darkness
Yes both the i9000 and the i9100 I own have this, you can also spot it while just turning on the phone before the boot screen, but I only notice while in a dark room or at night.
The faint glow is there because the pixels do not totally power down when displaying black. The screen is designed this way to give better response rate. No one wants a screen that ghosts isn't it
Sent from my GT-I9100 using Tapatalk
Gambler_3 said:
I havent seen any glow just how "teeny tiny" are we talking about here?? If you keep reasonable distance from the screen then it is perfectly black. Watching a video with black bars in a completely dark room the blacks are literally indistinguishable from the bezel.
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You only see it on a fully black screen. As soon as there is anything on the screen your eyes compensate for the light and you lose sight of the black. Try it as the OP suggested and you'll see it.
Archer said:
You only see it on a fully black screen. As soon as there is anything on the screen your eyes compensate for the light and you lose sight of the black. Try it as the OP suggested and you'll see it.
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Okay so we are talking fully black screen.
So while watching videos, playing games or having a black wallpaper(with obvious widgets or icons on top) the eyes would perceive it as pure black as I have experienced.
So for all practical purposes the contrast is infinite. OP you shouldnt worry about some glow on a fully black screen. I can tell you for sure that even in totally dark room lets say you are in the ICS app drawer you will not be able to see any glow between the icons, it would seem like the icons are flying in the air. The magic of SAMOLED.
Yes, there is a faint glow. But its only noticeable when you're in a completely dark room and your screen is showing only black.
However that does not in any way mean that SAMOLED+ doesn't have perfect blacks.
The glow is there only because the pixels aren't actually powered off (at least that's what I think)
The contrast ratio is still infinity.
The OP made this thread to prove a point, just checked and YES there is a faint glow in complete darkness.
Related
Just wondering if anyone else has noticed this on their RAZR. While in landscape mode (I first noticed this while watching Netflix). In the corner near the search capacitive button I noticed the lighting for the capacitive button seeps out a little, like a very small amount. It doesn't overwhelm the screen or anything. When holding my phone upright and looking down towards the capacitive buttons, I do notice some light coming out from the left and right corners. Just wondering if this is because of the design and is normal? Or is it a flaw in the phone? Thanks!
I have noticed this as well on my unit. I have also noticed black blotches on the screen that can be seen when the screen is completely black.
Sent from my DROID BIONIC using XDA App
Not evident on mine.
Sent from my DROID RAZR using xda premium
garywojdan81 said:
Not evident on mine.
Sent from my DROID RAZR using xda premium
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Hmm. It is somewhat hard to notice, I'm still wondering if it is a design thing or flaw.
I have exchanged my Razr and there is still light bleeding from the capacitive button (search). Also the black blotches remain when the screen is black and the backlight is on.
KENMAN OH YEAH said:
I have exchanged my Razr and there is still light bleeding from the capacitive button (search). Also the black blotches remain when the screen is black and the backlight is on.
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Thanks for confirming this.
droid razr
My screen also has the blotches when the screen is black and in low light conditions.my capacitive buttons also bleed into the screen in the corner but its not something i notice only when i really scrutinise the device.
I have a small streak or two of the blotches but they're only noticeable during the black boot up screen, not when using Netflix or YouTube.
There's absolutely no leaking from the white light of buttons though..
I also have the black bloches, it's like the screen isn't AMOLED; the black's aren't completely black, i compared it to the Galaxy S 2 and on the Galaxy you can hardly see where the edge of the screen is because it is completely black but on the RAZR it's as if the screen is more greenish where the Galaxy would be completely black.
The black's look better on the first Galaxy S than they do on the RAZR
I first noticed when i started using NOLED, i like it better than the led notification light on the RAZR
In any case, quite dissapointing
BTW i don't have light bleeding from the capacative buttons
Hmm. So some units have it and some don't? I do confirm the black blotches when watching netflix and the screen goes black you notice it. The light bleeding i noticed while watching a full HD movie and I was like eh.. What's this tiny flash moving in the corner. That's when I noticed the light bleed, and it occurs only when the capacative buttons are on. Another member stated that he exchanged his RAZR and his replacement one has the same issue as well. I've looked around and it seems other devices also have this issue as well. Not sure if it's just a design flaw or defect.
@Dusanzk you might actually have a defective unit if that's the case, cause some people were complaining about a green tint on the phone. My blacks and black, why whites are white, I have no problem with colors at all. Just that bleeding ;(.
It's quite hard to notice at first, i only notice in the dark and when the screen is completely black.
I downloaded an app called Burn In Tester, you can adjust the colours on your screen to see what they look like and when i choose black that's when i notice it.
Regarding the green tint, i'm not sure that's the problem i'm having because it's only a problem when something black is showing on screen and it's dark, in all other situations the screen looks amazing, like my Galaxy S 2
Do you have such stains? I hear this is normal among AMOLEDs.
welcome to mass produced (aka economically viable) OLEDs...
Some patterning or colour patching is inevitable even from new. Blue or Grey backgrounds tend to show patches up more. Very low brightness shows a greenish cast on the left of the screen too.
It took more than a decade before LCDs could be produced in volume with a very low dead pixel yield.
We have a dozen GS2s at work and they all have minor screen issues. From new. They do get worse or even change position over time (many months) as the pixel level elements shift in luminosity.
Also note that if the phone is warm, the effect lessens.
LenAsh said:
welcome to mass produced (aka economically viable) OLEDs...
Some patterning or colour patching is inevitable even from new. Blue or Grey backgrounds tend to show patches up more. Very low brightness shows a greenish cast on the left of the screen too.
It took more than a decade before LCDs could be produced in volume with a very low dead pixel yield.
We have a dozen GS2s at work and they all have minor screen issues. From new. They do get worse or even change position over time (many months) as the pixel level elements shift in luminosity.
Also note that if the phone is warm, the effect lessens.
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Click to collapse
Thank God I don't have dead pixels. At least this patch I got is visible only on dark-gray / medium-light (so-to-say, idk) brown. I'd rather have that than dead pixels .
Actually, if I start Screen Test, the patch is visible on ALL colors. On blue/red/green, it is less visible. On white, it is most visible. Also, when displaying full whites, the color is not homogeneous. Vertical and horizontal lines seem to be present ALL ACROSS the screen. These lines are visible on white, yellow and such colors.
At least I don't have ghosting effect and the whites are actually white, not yellow - as it was on Gingerbread (yeah, software problem, eh?).
So... the patch appeared to have vanished after running the fix (which rapidly ****s four colors) for half an hour, because the screen was a bit warmer... and as it cooled down, the patch has shown its face again. Oh well...
the galaxy note and s2 super amoled screens are prone to burn ins, very common, you need to eliminate risks involved.
Turn off auto brightness, lower the brightness level, shorten the time youre screen stays awake for, and if youre using themes, avid the blue themed ics ones, although they look nice, the blue themes are one of the biggest culprits of the burn in issue and before ya know it youve got a battery image burnt in.
i notice it looks like you have a blue theme or something, my mate had same issue, what can ya do, its a pain and well probably all suffer it, whereas htcs dont have the issue, they just suffer dead pixels a lot, but hey, id soone have slight burn in than dead pixels i guess
graemeg said:
the galaxy note and s2 super amoled screens are prone to burn ins, very common, you need to eliminate risks involved.
Turn off auto brightness, lower the brightness level, shorten the time youre screen stays awake for, and if youre using themes, avid the blue themed ics ones, although they look nice, the blue themes are one of the biggest culprits of the burn in issue and before ya know it youve got a battery image burnt in.
i notice it looks like you have a blue theme or something, my mate had same issue, what can ya do, its a pain and well probably all suffer it, whereas htcs dont have the issue, they just suffer dead pixels a lot, but hey, id soone have slight burn in than dead pixels i guess
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F*** !
MIUI uses white & orange. Are those colors dangerous, too?
I mean... what colors should I avoid the most? Besides blue - I get it, it's bad (again, F***).
Anything that turns the RGB elements hard on (!). So high brightness only and white is worst as this is RGB full on, then pure red, pure blue, pure green. Cyan, yellow and magenta are less risky. In theory.
In practice and the real world, just keep the brightness down a little and you'll get years out of it. And save battery - the screen is THE major power consumer...
LenAsh said:
Anything that turns the RGB elements hard on (!). So high brightness only and white is worst as this is RGB full on, then pure red, pure blue, pure green. Cyan, yellow and magenta are less risky. In theory.
In practice and the real world, just keep the brightness down a little and you'll get years out of it. And save battery - the screen is THE major power consumer...
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Click to collapse
+1 absolutely right, follow these simple rules and all should be good.
White requires all three elements (RGB), right? Blue = B. Which one should I stick to...? My logics tell me blue, but I hear AMOLED's blue color is so pure because of a compound from algae (rofl) and it wears off more quickly (if any of that makes sense).
Cyan, magenta, yellow... Yeah, I don't have that on AOKP, lol. And neither would I want a yellow theme. Magenta would be nice, though.
RGB... hell, those are the primary colors. How about we use black, with polarised glasses? That'd be a good deal, since I wear glasses, lol.
Seriously, guys, what do YOU do to make sure the screen doesn't get damaged over time? Don't tell me you're using a yellow-black theme. And setting the screen brightness to 50% or more is required outdoors, so...
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I just went to a showroom today. Seen the Galaxy Nexus there. It's on, with the brightness set to maximum, 12 hours a day, and it's been like that ever since they put it there - more than 3 months. Seeing anything strange here?
well, as a rule i dont have wallpapers that have bright vibrant colours, i find it annoying and painful on the eyes, and if you have shortcuts on the homescreen it gets to looking messy, so i stick with dark colours, to be honest most of my wallpapers are black or almost black and my brightness is set at around 20%, and i dont struggle to see it outside in sunlight or anything, but this is just my prefernce, im sure everyone has different tastes, i think you should just enjoy your phone and use it how you wish, but try to avoid having it too bright, it should be ok.
graemeg said:
well, as a rule i dont have wallpapers that have bright vibrant colours, i find it annoying and painful on the eyes, and if you have shortcuts on the homescreen it gets to looking messy, so i stick with dark colours, to be honest most of my wallpapers are black or almost black and my brightness is set at around 20%, and i dont struggle to see it outside in sunlight or anything, but this is just my prefernce, im sure everyone has different tastes, i think you should just enjoy your phone and use it how you wish, but try to avoid having it too bright, it should be ok.
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Click to collapse
I'll stick to the stock AOKP theme (blue, that is); but I will be careful not to raise the brightness above the point of 50%. And even if I do, I guess setting it to the maximum point for a few minutes (when the sunlight is very strong) wouldn't hurt...
Oh and mind archiving your black and dark wallpapers and sending them over to me? Please (I'm always happy to pile up such wallpapers)
Hello
I'm new to android and just bought my s3 so forgive me if it's a stupid question
Whenever I watch a movie, there are two or three black spots. I feel like they are dead pixels. It doesn't show up on a white background nor on my ics inspired background but now I notice it a lot during a movie especially if it's a dark colored movie(darkness and all). Are these dead pixels? Is there a display app which I can use to display pure different colors and find out?
Thanks in advance
Sent from my GT-I9300 using XDA
Spots? If what you are describing look like smears on the screen then no, I think this is an unfortunate defect with oled devices when black is viewed in really dark environments. My phone (not an s3 but uses amoled) exhibits the same problem and my PS Vita shows it very prominently.
A dead pixels is just a pixel (pretty much a dot on the screen) that is stuck in 1 color no matter what's being displayed onscreen.
There's a test screen, just dial *#0*#
However the black spots on dark background when your screen is on minimum brightness (e.g. in darkened rooms) are well-known issues plaguing AMOLED.
There are several threads around here describing them and their possible cause, and at least one developer has announced working on a screen tweak solving this and other typical AMOLED issues.
Yeah it's only noticeable on dark backgrounds with low brightness. I downloaded display tester and ran the dead pixel test and the smears were only noticeable if I looked super hard during a black background, not in blue or red or yellow nor gray. So no dead pixels right ?
Also thank you so much !
Sent from my GT-I9300 using XDA
omgbuffguy said:
Yeah it's only noticeable on dark backgrounds with low brightness. I downloaded display tester and ran the dead pixel test and the smears were only noticeable if I looked super hard during a black background, not in blue or red or yellow nor gray. So no dead pixels right ?
Also thank you so much !
Sent from my GT-I9300 using XDA
Click to expand...
Click to collapse
If you didn't notice any stuck dots, then your phone is good. As for the smears, pretty much everyone has them. I guess you have to be extremely lucky not to have them (that, or you just haven't noticed them yet so it doesn't bother you). The software solution pointed out above sounds interesting though. Will be watching that
About Dead/Stuck pixel on OLED Device Display
I have a S3 GT-9300 that I use daily, the other day I dropped it on a hard surface and a single shiny green stuck pixel appeared on the bottom left corner of the display, it was a bit of an eye sore really, But I'll share my simple FIX if its a related problem like mine was
I thought if the drop caused it, then a related solution may fix it, so I simple activated display and went to the home page.
then I turned the display facing my palm and held the device carefully at the top end and slapped it several times hard into the palm of my hand where the pixel problem area was. then stuck pixel went away...
I hope this works for you too :good:
Hello,
Im Using Amoled Smartphones since the Galaxy (i7500). They all were always showing at 100% Brightness for Black parts of a picture a true Black like the Display is OFF.
If you put the Brightness to 100% and go to an complete Dark Room and open an Black Picture you see some Gray/Yellow Tint on the Screen. You can compare this good by locking the phone to see the Screen OFF and than unlock it to view the Black Picture again. You should see a huge difference. Hope to hear from your experiences.
I've seen that already on the S1 when abusing it a a nightstand clock.
Best guess I've heard is that the (AMO)LED screen leaks some luminosity to other pixels in the background which is then visible as a very faint glow.
However I rather believe that the AMOLED are not truely off but rather get some leak voltage and thus have a very-very-very faint glow (like one photon per second xD )
That would explain the black spots most people seem to mind on AMOLED when on minimum brightness with a black screen; they are truely off or without insufficient leak voltagage (LED's requie a minimum voltage to work).
AMOLED production is somewhat complicated (very thin layer of silver as a power source and a control-layer) so I wouldn't be surprised if the above is true.
Nothing is perfect, especially not a rather new technology.
What else did you expect from a backlit display.
jbadboy2007 said:
What else did you expect from a backlit display.
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It's not backlit is the point.
Correct me if im wrong here but amoled is, by design, not backlit.
Sent from my LG-P920 using xda premium
Yeah so I was wondering why it does this little/ hard noticeable yellow/gray tint on a dark room...
There is no Backlight... Unfortunely i Sold my Galaxy S2 so I cant compare it.. But im Sure it wasnt like this
I have this on my gsiii and also on the Gnote... I think is due to the pentile screen
I had this on my Fascinate but realized it wasn't a big issue. Definitely more noticeable on my Gnex but it also has more pixels so that could be why you see more light. I wouldn't call it a problem because the majority of the time it's absolutely unnoticeable. Each pixel has so have some sort of voltage to be ready to react to changes. Turning off/on completely each time light is needed might waste battery.
P.S. I'm noob at displays but that's my theory.
Zacisblack said:
I had this on my Fascinate but realized it wasn't a big issue. Definitely more noticeable on my Gnex but it also has more pixels so that could be why you see more light. I wouldn't call it a problem because the majority of the time it's absolutely unnoticeable. Each pixel has so have some sort of voltage to be ready to react to changes. Turning off/on completely each time light is needed might waste battery.
P.S. I'm noob at displays but that's my theory.
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I was curious about this issue as well. It's my understanding that OLEDs do not produce any light in their inactive state.
Regarding your theory, I wonder if it's similar to plasma displays. Even though plasmas are capable of true black (they do not use a backlight) The individual plasma cells have better response times if they aren't fully discharged on blacks. So they have a faint glow that comes from the low power they are using to keep the pixel charged up and ready to go when a color change is needed.
This actually costs a little power though, rather than saving it. So if thats what they are doing, it is for screen quality reasons so that movies and other things look better.
Did some Googling and I couldn't find much information, but there is talk of delivering pre-charge voltage to the OLED pixels to improve response times. So it could be that they are indeed similar to plasma displays in that respect: Capable of true black, but the benefits of not using true black are too good to pass up.
Are you SURE the picture is actually true black? By that i mean pure 100% black in an uncompressed image? If not then you cant expect the phone to display true black. A JPEG of black may not be enough.
My screen it totally off when displaying true black.
I can confirm the screen showing a faint glow on S3 with a true black screen.
Use Firefox with Fullscreen extension (Chrome and the default browser don't seem to have fullscreen mode yet) and go to http://d4f.pf-control.de/black.html
That's rendered on the phone so we can expect it to be the blackest black an app can produce, however in a (very) dark room you'll see a very faint glow coming from the screen and you'll be able to see the black spots (truely black) that people keep complaining about.
The theory about it being a precharge voltage does indeed sound plausible since LED's have a certain reaction time which unfortunately cannot be compensated by e.g. Overdrive as is used in LCD screens.
Note that the S3's "black" is still far better than any LCD.
No mine is still jet black, no light at all.
Go to a COMPLETELY dark room and make sure the screen is actually turned on when on the website (not timed out).
Then take a long-exposure photograph of your phone (still make sure the screen is turned ON!).
I don't have a long exposure camera, but the room is completely dark and my eyes have adjusted, there is no light.
All sgs3 ( as sgs2) screens emit a very week glow on a black pictures ( with the screen on )
Sent from my GT-I9300 using xda premium
It would seem to me that the 'ink spots' many have are not overly dark spots at all, they are what the screen should be. My screen emits no visible light when displaying a true black image, at least nothing my eyes can see, even at the edge of my vision field where light cell are most sensitive. My screen is on maximum brightness.
My screen has no patches, no streaks, no spots, no pink or excessively blue tint. I guess i have a screen thats as near to perfect as they get.
yes there is very faint glow indeed making the screen a bit greyish instead of pitch black
Excuse me if I am being naive but where is real life use would this ever be a negative impact?
jfenton57 said:
Excuse me if I am being naive but where is real life use would this ever be a negative impact?
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Click to collapse
no negative impact, but still raises a question "why so?"
jfenton57 said:
Excuse me if I am being naive but where is real life use would this ever be a negative impact?
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Click to collapse
I don't think anyone is trying to paint it as an issue that needs to be resolved. It's more of an odd technical mystery rather than a real problem. The blacks are still extremely deep on an AMOLED, just like with Plasma it puts LCD to shame in that department.
So i've heard that the S-AMOLED and S-AMOLED Plus technology has "Perfect" Blacks! Like the Blacks don't even "Light-up".
Is it true? Or is it just a marketing thing? :/
Try this and tell me what do u have?
Turn off all the lights in the night and then view some BLACK picture. U'll see that the Blacks are kinda "Greyish" :/
And there are some pixels that are perfectly black.. but they're just Random... :/
known "issue" on lowest screen brightness
Ohk.. So its not "Completely Black".
theres also another problem with it aswell... When I view some pitch black picture in a completely dark room. I see some small rectangular shapes that are "Pitch Black" in that Greyish background. I cant snap a picture of that unfortunately but u kinda get the idea. Can someone try this with there own S3 and report me? :/
It'll be quite helpful
Is well known issue.
http://forum.xda-developers.com/showthread.php?t=1703086
Sent from my GT-I9300 using xda app-developers app
Mine does the same thing: darker black splotches when viewing a black picture on the dimmest screen setting in a dark room.
Fortunately I don't often find myself looking at all-black images in the dark. It's hardly a major issue.
this issue is quite common, even on iPads, Motorola etc...apparently it is the adhesive within the layers of the AMOLED that causes an "ink" mark when screen displays black images within a dark environment...nothing is actually wrong with your scren, mine has 2 very small dots...while my other friend has had his replaced because the issue was far more prominant...so there is a possibility of claiming warranty? but this will depend on the country/retailer/etc...but always worth giving it a shot if you cant stand this issue...but yes, earlier batches, the issue was far more obvious...but later ones are better but information from other XDA threads suggest that you WONT find a unit without any marks...period.