Database Users

AMOLED displays cant display true black...:Screen Discussion :...

As seen by the NoLED app over in the dev section, and in a few other places on the net, people are finding that when they display a black image on their amoled/samoled screens in a dark room there is still light emitted by the display. it is not truly black
I would like to know why!
One thing i hear is about image compression and signal noise causing the pixels to not display #000000 black and instead a variant of black/grey causing the pixel to become lit.
This problem is not an issue during the day, i can't tell the difference when my screen is displaying black or off. but what it does effect is battery life.
If the screen isn't powering down its pixels then it is not saving anywhere near as much power as it could do
Also
How happy are you with your display?
I knew about the pentile problem before buying, however i am not dissatisfied with the display at all. Infact if i did not read up about it i would not have realised there was anything different with the screen.
Text is clear and sharp, images are vibrant, and colours seem true with no issue of pink problems like the desire

looool, look at any lcd screen(tv whatsoever) and you don't have true black, because the backlight is on. Only the best LED LCD screens in TV world have FULL LED backlight that can dim the leds from parts of the screen that are fully black in the processed image.
take care

yup, if you take apart your LCD watch, phone, laptop or monitor
you'll see 2 layers, first layer the LCD/TFT/AMOLED/SAMOLED/etc whatever new technology screen you can think of name it here.
then the bottom layer is pretty much like a light bulb/white led/ccfl or whatever you want to call it to light up the first portion of the screen.
most devices you can control the 2 separate pieces separately via "screen" and "back light"
you'll noticed that usually on software options what specifically lets you control both indedpendly.

Eh.. Yes But the SGS hade OLED screen. So it should be able to turn pixels completly off. My guess is that each led has some very small current applied to it possibly to speed up response off screen.
But it come close to true blacks..
EDIT
OLED screen has NO backlight... Each pixel is an tiny led...
Sent from my GT-I9000 using XDA App

thanks for the heads up, that's good to know
i've yet to take apart a new SGS to figure out how the AMOLED displays works

You guys need educating on displays lol
oled screens have no backlight, thus no backlight bleed.
That means that this is a software issue, unless the screen not powering down completely is intentional

Software issue and nothing more.
Open up the calculator, drag down the numpad, hide the 2 stripes (status bar and numpad drag bar) in the top and bottom of the screen, and tell me if you see any lighting.
There's absolutely nothing.

there is still light emitted. cover up the top and bottom bar with your hands, go into a completely dark room then look into the center of the screen.
There is a uniform glow, just like when looking at a black image in the gallery or browser

It's actually more noticeable if you look AWAY. The peripheral area of your retina will be able to pick up a very feeble amount of light. Feeble, sure, but it's there nonetheless.

seriously, guys?

XQC said:
seriously, guys?
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Click to collapse
The problem is that the way it is supposed to work is that if you display black, the screen shouldn't use any energy at all but it is and people can see it and so is using precious battery charge.
The issue is... that apps like noled which were going to display a red dot on the screen to let people know if they had mail waiting or whatever wouldnt use much power at all because they were displaying mainly a black screen but it isnt actually black and still using light so still chews through the power..
hope that made sense.. but that is why people are interested in it..

Ok, I missed the battery part, sorry If so, it is indeed an annoyance...
I thought people were seriously complaining about image quality.

I have the Samsung wave and it uses the same screen technology and I can tell that it does not have true blacks pixels are still lit, I can easily tell that its on and totally off there is a very faint trace amount of light produced..

Since I first got this device and turned it on I have been impressed with the display. I am kind of partial to AMOLED diplays and am, thus, a bit biased. What surprised me was that it "appeared" sharper than the display on the Nexus One. Considering it is slightly larger and at the same resolution I just assumed that it wasn't using the PenTile arrangement - yet it appears that it does in fact use the same subpixel arrangement as the screen on the Nexus One. My point is... now I've forgotten my point. Basically that I am more than satisfied with this display.
As far as the black issue is concerned I have no idea. There must be some reason considering that was one of the supposed strengths of this technology (i.e. true blacks and lower power consumption).
El Mono

wait so why would you display an image if you want to save battery?
really
How many of you have measured how much power is being used up when the display is displaying a true black image(measured with multimeter, or other measuring device)
How many of you have made sure that the glow is not caused by a residual charge in the display?
How many of you know how much time it takes for the "glow" to leave an OLED panel when power is not being applied?
just some food for thought

The thing is, amoled screens were advertised as having true blacks and having the pixels off when displaying black. this is clearly not the case

It's not an issue with the technology. The screen doesn't have a back lighting panel, so i think it's more of a problem of what shade is default defined as "black" in the system, or something with any current running through the screen.

Well considering the screen doesn't turn off when displaying a 100% black bitmap image, its safe to say that the say that the pixels NEVER turn themselves off during use when displaying black

Could be the screen isn't calibrated properly, or they lied to us about the tech(wouldn't be the first time).

While its not "true black" it is defenently beyond what any backlit screentype can do regarding blacks.
Except perhaps for the retina display forged by god himself
But I agree that if Samsung states True black then it should be able to do that.
Sent from my GT-I9000 using XDA App

True Black

So, I stumbled across something really cool (quite) a few minutes ago: apparently our devices really can power a few pixels selectively. In my accidental confirmation of Samsung's claim, I was able to get one of NoLED's notification icons to show on the screen without lighting up the rest of the black area for literally a split second.
Here's how:
1. You will need the app "NoLED" in order to continue. In the NoLED settings, make sure you have the icon for sms activated as well as the proximity sensor. My sms icon is set to a lime green, but I doubt that will affect this "test."
2. Send yourself a text message either from your own phone or from some other sms capable device. If sending it to yourself from your own phone, quickly lock the device using the power button after pushing send.
3. Allow NoLED to start flashing around the icon for sms. Wait roughly 5 seconds for the proximity sensor to activate.
4. For steps 4 and 5, it would be wise to be in a completely dark room to be able to more easily tell the difference between the true black and the lit black. With the proximity sensor now active, place your finger over it. The screen should turn off.
5. Now, upon removing your finger pay close attention to the icon that will appear. The icon will show up a couple of milliseconds before the rest of the screen activates.
6. Repeat steps 4 and 5 if needed to witness the true black.
This is proof that our SAMOLED screens can display true black.
I am not a developer so I have no idea how to act upon this find to, if possible, adjust settings in the our software to allow true black.
If you happen to know someone who is capable of modifying the kernels or ROMs for our devices to allow this behavior, then by all means have them follow the above steps to see the proof.
Though I hope this minor find can give someone the inspiration and/or start place needed to make these adjustments, I realize this is but a pebble in a world of boulders. Therefore, I remain skeptical and strongly advise others not to get your hopes up.
If anything, it is at least nice to see that Samsung wasn't just lying about the capabilities of SAMOLED screens, but also makes one wonder why they don't allow true black from the start.
Now, time to hit the hay.
Goodnight all.
Sent from my SCH-I500 using Tapatalk

On the epic, when you power it up to the initial "galaxy s" screen, you can see true black...the fascinate doesn't have that opening animation?
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A_Flying_Fox said:
On the epic, when you power it up to the initial "galaxy s" screen, you can see true black...the fascinate doesn't have that opening animation?
Sent from my SPH-D700 using XDA App
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Click to collapse
It probably did at one point but since I changed kernels and boot animations trying to get rid of verizon crap that animation doesn't show up anymore, which sucks cause I actually liked that one.
Sent from my SCH-I500 using Tapatalk

When i power the device off in a dark room, at the end of the power off cycle I get a black screen that isn't black like the other black screens when the phone is on. It looks like it's glowing in the dark or some junk, and you can see a weird pattern like something smudged across the screen.
Is this the type of thing you're talking about? That our devices, when showing black, are actually working to show that black and not just "turning the pixel off" er whatever?

chronster said:
When i power the device off in a dark room, at the end of the power off cycle I get a black screen that isn't black like the other black screens when the phone is on. It looks like it's glowing in the dark or some junk, and you can see a weird pattern like something smudged across the screen.
Is this the type of thing you're talking about? That our devices, when showing black, are actually working to show that black and not just "turning the pixel off" er whatever?
Click to expand...
Click to collapse
Yes, if I'm understanding you correctly that is what I'm talking about. That glowing, almost grey effect shouldn't need to occur in order to show black. I hope it is something that can be hacked, but I don't know.
Sent from my SCH-I500 using Tapatalk

I guess this makes me lucky to have 1 pixel stuck on blue. I can easily see the screen turn off in almost any lighting condition.

Couldn't it be that what you're seeing is some kind of residual charge left at power off or some pixels that change states at slightly different rates? I've seen it too and it seems to be a different pattern every time. Also, some of the forums regarding screen burn have talked about samoled break-in so maybe that has an impact as well. Can't factor out power supply leakage either, I guess.
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garywojdan81 said:
Couldn't it be that what you're seeing is some kind of residual charge left at power off or some pixels that change states at slightly different rates? I've seen it too and it seems to be a different pattern every time. Also, some of the forums regarding screen burn have talked about samoled break-in so maybe that has an impact as well. Can't factor out power supply leakage either, I guess.
Sent from my SCH-I500 using XDA App
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Click to collapse
It is true all of those things could be probable, but in order to prove that the pixels aren't turning off you could disable the lock and screen dimming functions with an app and display a black image. Then in low light conditions you could easily see the blacks are actually a very dark shade of grey. If the pixels were turning off the image would over time obtain deeper blacks as the residual charge runs out.
I, and many others, suspect the phones are programmed to not turn off the pixels. Only question is, why? The only thing this type of test wouldn't be able to prove or disprove is power supply leakage.
Sent from my SCH-I500 using Tapatalk

atrich0608 said:
I guess this makes me lucky to have 1 pixel stuck on blue. I can easily see the screen turn off in almost any lighting condition.
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Click to collapse
That sucks to have a stuck pixel! Have you tried having the phone replaced? I don't know for sure but a stuck pixel might fall in the manufacturer defect category, so you might be able to have the phone swapped for free?
Sent from my SCH-I500 using Tapatalk

Or you can go and download Screen Test and get to the black screen part of the test. It is so hard to notice, but blacks are ever so slightly lighter than if you were to turn the screen off, but it is really hard to catch. Either way, they trump any LCD black levels. They even make my Panny plasma look bad

GoogleAndroid said:
Or you can go and download Screen Test and get to the black screen part of the test. It is so hard to notice, but blacks are ever so slightly lighter than if you were to turn the screen off, but it is really hard to catch. Either way, they trump any LCD black levels. They even make my Panny plasma look bad
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Click to collapse
Didn't know about that app but I'm sure it would work just as you say. And by the way that would be much easier to notice if you were in complete darkness. I'm completely satisfied with these amazing screens, but it would be awesome if we could obtain true black.
Sent from my SCH-I500 using Tapatalk

evilhunter101 said:
Didn't know about that app but I'm sure it would work just as you say. And by the way that would be much easier to notice if you were in complete darkness. I'm completely satisfied with these amazing screens, but it would be awesome if we could obtain true black.
Sent from my SCH-I500 using Tapatalk
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I HAVE tested it in darkness. It is just such a small difference most people's eyes probably couldn't even pick up on it. Blacks are pretty black on this.

evilhunter101 said:
That sucks to have a stuck pixel! Have you tried having the phone replaced? I don't know for sure but a stuck pixel might fall in the manufacturer defect category, so you might be able to have the phone swapped for free?
Sent from my SCH-I500 using Tapatalk
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It's only one and it's on the side, it does work sometimes. I use noled and it seams to come on at the exact same time as the notifications. Cover the proc sensor and it turns off.

Have you tried jscreenfix from the market? It's free and alot of feedback suggests it can work on stuck pixels.
Sent from my SCH-I500 using XDA App

GoogleAndroid said:
I HAVE tested it in darkness. It is just such a small difference most people's eyes probably couldn't even pick up on it. Blacks are pretty black on this.
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Click to collapse
Calm down man, was just a suggestion lol. But that's interesting, considering mine is extremely noticible in darkness even with the brightness turned all the way down. I suppose each phone would behave differently in this respect though.
atrich0608 said:
It's only one and it's on the side, it does work sometimes. I use noled and it seams to come on at the exact same time as the notifications. Cover the proc sensor and it turns off.
Click to expand...
Click to collapse
Well I guess that isn't too bad, hopefully it isn't a sign of things to come. Back when I had my Storm 1, I had a red stuck pixel. It wasn't too bad either until it started spreading a few months later. That's okay though, I was one of the lucky ones who got a Storm 2 as a replacement from Verizon. If you havent, you should definitely try that app mentioned above though.
Sent from my SCH-I500 using Tapatalk

Yep I tried that app. I kind of like it now, maybe I will name it lol. I will save it for later, if I scratch the screen or something It will give me an excuse to get a new phone

amoled burnin

Ok, i own my galaxy about 5 months. I turned the backlight to 0% in andromax, started the xda app and saw my battery, signal indicator and time as a shadow at the brown xda loadscreen. brightness was always set to auto.
I know this effect on plasma tvs, but with amoled, shouldn't be possible by design.
any thoughts are welcome
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It's usual degradation of OLEDs. As the statusbar is quite static those pixels that are always light degrade faster than pixels than other ("not so static") pixels.
Now the more degraded pixels are darker on the same voltage levels and this can be seen when the statusbar is hidden.
That's one of the disadvantages of OLEDs currently.

Sysiphus1981 said:
Ok, i own my galaxy about 5 months. I turned the backlight to 0% in andromax, started the xda app and saw my battery, signal indicator and time as a shadow at the brown xda loadscreen. brightness was always set to auto.
I know this effect on plasma tvs, but with amoled, shouldn't be possible by design.
any thoughts are welcome
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Click to collapse
Try rebooting your phone, then in the keypad dial *#0*# and test the screen with the options there check if there is any error in colour reproduction. Or test with images created with paint with only a single colour paint and test it with the screen on galaxy s.
If you observe any colour out of place or not uniform throughout, it might due to hardware issue of the amoled screen.
Hope this helps

checked via sgs tools secret codes (the code from above) lcdtest. degration is there for green and blue, hard to see in red.
will test some disco flash app, maybe it will get better like with plasma panels.
all in all, it is only annoying and the display will get damaged by design. I wonder, if there is a theme for the bar with less contrast grafics, like most tvstation did with there stationsymbol.
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The blue pixel organic compound of AMOLED will degrade the quickest. That's the reason these phones are programmed to be more blueish when new, so that as it degrades, the blue should still be visible until the screen dies.

I own my SGS I9000 now since the 25th of June and i don't have that problem, how long is your total amount of Screen on time? I think by intensive use my approx. Screen on time per day is about 2 h. 6 Months are 180 days a 2h are 360h. Industrial Keys for Control Panels with OLED Displays have a average lifetime of 15000h, newer one 30000h.
I don't knew the lifetime for Samsungs AMOLED Screens but i guess it sould be around 10 to 15k hours. So i would contact seller, or samsung service about that.
Regards Christopher
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In the UK you're covered by the Sale of Goods Act - the phone should be expected to last a good 5 years or so. I didn't agree to anything about a failing screen so if it doesn't last an appropriate time then I'll be expecting a replacement screen.
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You know what? I went to check my screen under white, red, blue and green; I have some burn in for the battery icon as well. Lol.
To avoid more damage, I will be using the device in varying orientation.
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I wonder how fast the SAMOLED will die if its used as a deskstand for 8hrs / day

kempas said:
In the UK you're covered by the Sale of Goods Act - the phone should be expected to last a good 5 years or so. I didn't agree to anything about a failing screen so if it doesn't last an appropriate time then I'll be expecting a replacement screen.
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UK law says a product is expected to last 12 months however Samsung do have a 24 month warranty on this product which is nice. If i was you kempas i would have that repaired (screen replacement) as it's completely free except for the time it takes.
Samsung Warranty Information
Just remember to flash back a factory firmware before you send it to a repair centre, custom/modified firmware voids your warranty in any country.

I've got my phone for about 4 months, everyone else I know can see a visible silhouette on the AM/PM symbol with a blue/white image displayed on the screen.
I guess in a year's time its gonna be completely screen burned.. would this mean that SAMOLED is pretty much in infancty/trial stage?

Sysiphus1981 said:
I turned the backlight to 0% in andromax,
Click to expand...
Click to collapse
There is no backlight on AMOLED and SAMOLED screens.
EarlZ said:
I wonder how fast the SAMOLED will die if its used as a deskstand for 8hrs / day
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Click to collapse
Pretty damn quickly. Well it wont die, but burn-in will set in and the screen brightness will degrade.
Although if you use an app like alarm clock Plus it shouldn't be a problem. When it goes into screensaver mode it keeps the background black and only uses a small portion of the screen to display the time and date. It also moves the time and date around to prevent burn-in.
I use it at night when my phone is charging. The black pixels do emit a tiny amount of light but that shouldn't do any harm.

EarlZ said:
I've had my my SGS for about 4 months, everyone else I know can see a visible silhouette on the AM/PM symbol with a blue/white image displayed on the screen.
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Click to collapse
I've had phone for 6mths. Most of the time on 0% brightness. I never noticed it before but after reading your post I noticed the AM/PM burn in VERY VERY slightly (only on pure blue background)
From now on I'm using 24hrs clock format LOL.
Let's face it though guys, u can't keep a perfect screen forever. I even have a single stuck pixel but I learned to live with it. (1 pixel on a 480x800 screen is fairly unnoticeable, especially if it's a good colour).

It was not noticable till i read about this thread, i hate knowing things like this! hahah
Anyway we can fix the burn in ?
EDIT:
The 24hr format barely helps since theres already a very faint image of the numbers burning in.
Im guessing after a yr of usage the screen burn will be very obvious... with this said im having 2nd thoughts of getting another AMOLED based screen haha

to fix LCD TV's you flush with white. so leave a pure white screen running over night. this kinda resets the crystals.
worth a try with the phone also with the galaxy s you need to have 8 dead pixels to change the screen so if affected area is over 8 pixel should be fine.
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The AM/PM sign is displayed by a white pixel so Im not sure displaying a white color overnight can help fix the issue.
Having the screen replaced is not an option here in where I live, its gonna take over 60-75 days for them just to replace the screen and chances are it will be a refurb screen or they will just outright refuse replacement since its a burn in.
The affected area is probably more than 8 pixels.

it resets the crystals so should work. worth a try if someone has a burn
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sorry not cyrstals the leds
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iammodo said:
it resets the crystals so should work. worth a try if someone has a burn
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The AM/PM is displayed with a white color by default, so how can displaying a a full white screen fix/reset the image burn ?
btw the image burn is a faint black.

Im also guessing with the GB update they removed the AM/PM so help prevent screen burn and prolong the intitial burn instead of 4 months to probably 8 or 12.

Be careful : Screen Burning on GS II !!!

Hi, I'm French so sorry for my English.
I use every day software called "iCoyote" to signal and be notified of fixed and mobile radars.
I've never let "iCoyote" running over 30 minutes.
Yet, I have a huge "Burn-In".
(on a I9100)
Photos (the last photo shows you how is "iCoyote" to compare with the screen burning).
My S GS II is now to the after-sales service since yesterday.

RaPiiDe said:
Hi, I'm French so sorry for my English.
I use every day software called "iCoyote" to signal and be notified of fixed and mobile radars.
I never let "iCoyote" running over 30 minutes.
Yet, I have a huge "Burn-In".
(on a I9100)
Photos (the last photo shows you how is "iCoyote" to compare with the screen burning).
My S GS II is now to the after-sales service since yesterday.
Click to expand...
Click to collapse
that does look really bad but the thing is if you are using that in the car and its infront of the sun as well it will get extremely hot...hopefully now that you have took it back they will sort it for you...but using the phone intensively it will get hot...just like computers or laptops even playstation..use them long enough they do start getting hot my friend..all the best hope it wont happen again

Dont these mobile screens have any threshold temperature values to turn off when reaching such temperatures???

Matriak31 said:
that does look really bad but the thing is if you are using that in the car and its infront of the sun as well it will get extremely hot...hopefully now that you have took it back they will sort it for you...but using the phone intensively it will get hot...just like computers or laptops even playstation..use them long enough they do start getting hot my friend..all the best hope it wont happen again
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Click to collapse
Thank you for the answer .
I know the sun can be responsable but the problem is not present with a GPS device or many phones.
Samsung sells a car holder but if you use it, you kill your phone...
I've never used it more than 30 minutes in a row... And my screen is burnt...
I made this new topic to warn people. Be careful using this screen.

RaPiiDe said:
Thank you for the answer .
I know the sun can be responsable but the problem is not present with a GPS device or many phones.
Samsung sells a car holder but if you use it, you kill your phone...
I've never used it more than 30 minutes in a row... And my screen is burnt...
I made this new topic to warn people. Be careful using this screen.
Click to expand...
Click to collapse
Nothing to do with heat, research amoled displays. The more you use a particular color the less bright over time the color pigment will be. Blue lasts the shortest, then green then red.
On my old galaxy s, the clock made a set of "burnt in" pixels in its place. On an all blue screen, the clock had obvious burn in, green screen less noticeable, red not noticeable. One idea could be to lower the brightness to reduce the effect, but it WILL happen to some degree. For me it isn't noticeable unless I look for it...
The ring you see is actually not "burn in" in the sense of old CRTs or plasma, in fact its the opposite. With burn in, if blue "burns in" you always see blue. Amoled is the OPPOSITE. The reason the ring above appears to be redish-green is because the blue is "depleted" more so than red or green. As I said before the colors deplete at different rates, thus blue will burn out sooner than green, green sooner than red. So for the ring you see above, on a screen meant to be 100% white, your "ring" will be maybe 80% blue, 95% green, 100% red based on how much brightness each sub-pixel has lost.
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please delete
compuw22c said:
Nothing to do with heat, research amoled displays. The more you use a particular color the less bright over time the color pigment will be. Blue lasts the shortest, then green then red.
On my old galaxy s, the clock made a set of "burnt in" pixels in its place. On an all blue screen, the clock had obvious burn in, green screen less noticeable, red not noticeable. One idea could be to lower the brightness to reduce the effect, but it WILL happen to some degree. For me it isn't noticeable unless I look for it...
The ring you see is actually not "burn in" in the sense of old CRTs or plasma, in fact its the opposite. With burn in, if blue "burns in" you always see blue. Amoled is the OPPOSITE. The reason the ring above appears to be redish-green is because the blue is "depleted" more so than red or green. As I said before the colors deplete at different rates, thus blue will burn out sooner than green, green sooner than red. So for the ring you see above, on a screen meant to be 100% white, your "ring" will be maybe 80% blue, 95% green, 100% red based on how much brightness each sub-pixel has lost.
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Click to collapse

Maybe its because of sunlight...
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ryn888 said:
Maybe its because of sunlight...
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Click to collapse
Answer :
I know the sun can be responsable but the problem is not present with a GPS device or many phones.
Samsung sells a car holder but if you use it, you kill your phone...
I've never used it more than 30 minutes in a row... And my screen is burnt...
compuw22c said:
Nothing to do with heat, research amoled displays. The more you use a particular color the less bright over time the color pigment will be. Blue lasts the shortest, then green then red.
On my old galaxy s, the clock made a set of "burnt in" pixels in its place. On an all blue screen, the clock had obvious burn in, green screen less noticeable, red not noticeable. One idea could be to lower the brightness to reduce the effect, but it WILL happen to some degree. For me it isn't noticeable unless I look for it...
The ring you see is actually not "burn in" in the sense of old CRTs or plasma, in fact its the opposite. With burn in, if blue "burns in" you always see blue. Amoled is the OPPOSITE. The reason the ring above appears to be redish-green is because the blue is "depleted" more so than red or green. As I said before the colors deplete at different rates, thus blue will burn out sooner than green, green sooner than red. So for the ring you see above, on a screen meant to be 100% white, your "ring" will be maybe 80% blue, 95% green, 100% red based on how much brightness each sub-pixel has lost.
Sent from my GT-I9100 using XDA App
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Click to collapse
Thank you for this answer. Now, I understand that the screen is "used" and not burnt.
Always using auto brightness.

I can see a difference in the notification bar area when I put the phone in landscape, eg in the browser.
I've got the phone about 3 months and a half ago.. I've pretty used the phone. Using auto brightness.

I noticed over the last few days some burning in. I went to start a thread to see if anyone else had this and there is a thread also underway in the Q&A section http://forum.xda-developers.com/showthread.php?t=1284984

That means any app that stays open (i.e. Car Home) can damage your screen. I had no idea, thanks. At least Car Home has the screen 90% black...

Thank's for the heads up and I will try not to use blue no more. (I did not think it would make a screen "burn out" so fast.) My 5 year old 32in Lcd hdtv I had dimed out to the point were it started becoming hard to see movies with dark themes. (I now have a 46in LED tv)

yep. I have Samsung Omnia II - first Samsung phone with AMOLED display. And noticed that time that blue pixels wear very fast.
It's pretty similar to plasma displays.

sorg said:
yep. I have Samsung Omnia II - first Samsung phone with AMOLED display. And noticed that time that blue pixels wear very fast.
It's pretty similar to plasma displays.
Click to expand...
Click to collapse
Yeah, a little research on AMOLED screens will reveal their struggles with finding blues that last anywhere near as long as green, much less red. Since it's an organic compound in the end, it's going to have a somewhat limited lifespan. How long it'll really last is going to vary by use, brightness, and luck of the draw.

Awww nuts!
That's a bit off-putting really but I'm glad I found out about the screen issue. I'm having a real to-and-fro battle trying to decide which phone to buy, Sensation or GSII. Each have their pros and cons.

when i had my mobile for like 3 days i was playing fruit ninja at highest brightness and all the slashing on the screen after 3-4 min i had a warning that screen temperature is high and it reduced brightness automatiacally but nothing happened to screen

Thanks for sharing this info, RaPiiDe. And thanks to ompuw22c for explaining this amoled specific issue.
Did anyone managed to get screen replaced, does warranty cover it?

My GS is almost 2 years old, but the screen is perfect. I guess that's because I set the screen the lowest bright unless I use it outside. Even though it's lowest bright, the screen is bright enough to do almost everything. I love superamoled.
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yqed said:
That means any app that stays open (i.e. Car Home) can damage your screen. I had no idea, thanks. At least Car Home has the screen 90% black...
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A respectable night docking app must do two very important things right:
a) must lower brightness to minimum
b) must move the image left/right/top/bottom by a few pixels every so often , to minimize strain on pixels.
Slysdexia said:
Yeah, a little research on AMOLED screens will reveal their struggles with finding blues that last anywhere near as long as green, much less red. Since it's an organic compound in the end, it's going to have a somewhat limited lifespan. ...
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Just so no one gets confused here: "Organic" in OLED does not mean "material came from once-living organism, or is a product of decay". It instead means "made from an organic compound" - where "organic compound" is a material that contains carbon. Another example of an organic compound is diamond. Carbon is basically everywhere

I have terrible usage from PowerAMP in car mode. Just got my USB jig though. Will most likely send it in for replacement.
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[Q] Static image screen burn in issues with GS4?

I have fallen in love with the Dashclock Widget. If you haven't tried it yet, I'd try it and see if you like it. It's very elegant and informational.
With that said, the widget integrates well with the "Day Dream" function. Basically, you can set it as something of a screensaver to scroll info about your phone throughout the day. I would like to be able to set day dream to "Static", which means I have the white text clock on a black background all day while charging at work. I would also have this set next to my bed as a faux alarm clock.
I have an older 2007 Plasma TV with a burned in ESPN scroll bar because I left the screen on a static image for too long. I would like for that NOT to happen with my new GS4.
Is there any chance of screen burn in with the GS4? I know the AMOLED is a much newer tech than the plasmas of old, but you can never be too sure.
Thanks! :good:

Yes. It will burn over time. It won't be as aggressive as a LCD or plasma screen, but it still burns. You should never leave your screen on with a black background and white text for hours. You should also not be charging it all the time as it appears that you want to. Charging produces heat, heat accelerates the burn. You should only charge the phone when it needs it.
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graydiggy said:
Yes. It will burn over time. It won't be as aggressive as a LCD or plasma screen, but it still burns. You should never leave your screen on with a black background and white text for hours. You should also not be charging it all the time as it appears that you want to. Charging produces heat, heat accelerates the burn. You should only charge the phone when it needs it.
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Thanks for the information!
Do you think turning the brightness to minimum would mitigate, or slow down, burn in issues?
There is also a "fade" option on day dream that fades the clock in and out every minute or so and places it on a new part of the screen. I think I'll stick to that for now.
Also, thanks for the charging tips. :good:

It will slow it down. But even with that you are looking at significant screen burn in about 6 to 8 months. Having a low screen brightness with the fade/ movement will be your best option.
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