Black screen not totally black - Galaxy S I9000 Q&A, Help & Troubleshooting

Hey guys,
I thought the big advantage of the super amoled screen was that black is simply black because no pixel is lighting. But using the phone lying in the bed when its totally dark in the room reveals that the whole screen is not actually black at all. When using Noled, for example, the battery drain is pretty heavy since the whole display has a very low background brightness the whole time. Can anyone tell me the reason for that, please?
Sent from my GT-I9000 using XDA App

Likely to be an idle voltage causing a slight glow.
I don't think they can turn the pixels individually off, just dim them massively
Sent from my GT-I9000 using XDA App

Well technically you can turn them off. The problem is each pixel is controlled by a transistor and so the level to which you can turn each pixel off depends on that. It could very well be that the transistors aren't turning off 100% and some current is leaking through. It depends on the technology used and a lot of other factors. Nothing is perfect.

Related

[Q] Is the SGS1 display good ?

By good, I mean, free of faults ?
I bought a SGS2 online and waiting for receiving it. But considering the large amount of users having a yellow tinted screen on the left, I'll probably get one of those faulty devices too.
In that case, I'll get it replaced and go for the SGS1, but, as a SGS1, can you tell me if the S1 has the same issue ?
Thanks.
No nothing like that on SGS1 or even i am using SGS2 its also quite fine and no screen tinted issuse.
Sent from my GT-I9000 using XDA App
The wifes sgs2 has tint.
My 1.5 yo sgs1 has had no screen protector ever and is still scratch free and all pixels working like new.
My experience anyway.
Sent from my GT-I9000 using XDA App
sgs1 screen is brilliant i think.
scratch free and you can see it outside when sun is shinning really well.
I had two different HTC phones. And they where both useless outside. could not see a thing.
SGS1 display is nothing less than a benchmark for all the mobile displays out there in the market. First device ever to have such an awesome, vibrant and Gorilla resistant screen. I'm in love with SGS just for its display.
Other not being really sharp up close due to pentile the display is perfect. Bright, great colours and takes a beating.
There are kernels with integrated functionality to correct for any colour tint. To be honest, AMOLED ages really ugly. Contrast is great, colors too, but after a few months of moderate usage, when the screen displays a grey image, the color is not uniform. It has signs of burn-in from place to place. This is the biggest disadvantage of this tipe of screen. I have it since March and sometimes I wish it had SLCD instead. I always have to be carefull not to keep the display on for too long or with the same image and icon layout on the screen.
Sent from my GT-I9000 using XDA Premium App
Not on my phone. Nearly 1.5 yo and no such problems. Greys look fine. I'm always on it too.
Like stated before. Its the benchmark. Slcd sux in daylight.
Sent from my GT-I9000 using XDA App
Al3cks said:
There are kernels with integrated functionality to correct for any colour tint. To be honest, AMOLED ages really ugly. Contrast is great, colors too, but after a few months of moderate usage, when the screen displays a grey image, the color is not uniform. It has signs of burn-in from place to place. This is the biggest disadvantage of this tipe of screen. I have it since March and sometimes I wish it had SLCD instead. I always have to be carefull not to keep the display on for too long or with the same image and icon layout on the screen.
Sent from my GT-I9000 using XDA Premium App
Click to expand...
Click to collapse
Not my experience at all. Well over a year old, no screen tint, burn in, loss of colour or missing pixels. Best screen I have seen.
Sent from my Galaxy S using XDA Premium App
I'm 1 year in and can barely see the 'M' from AM/PM before I started using 24-hour clock along with a bit of 'smudges' around the time, and only on a bright solid blue screen.
I could see issues if you set the screen to stay on while plugged in all day and put 10+ hours a day on it (I did that a few times and I think that's where my bit of burnout came from) but for the typical few hours of use a day there doesn't seem to be much of a problem.
Hands down the SGS is the best display I have ever used on a phone!
I also have an Atrix with double the power (including ram) and I still keep uning my SGS. The screen is just way to good...
Sent from my GT-I9000 using xda premium
I agree, on higher brightness and a more vivid color you can't tell if the screen is burned-in. But try this. Get these 2 apps from the market OI Flashlight and OI Color Chooser, open OI Flashlight, press left softkey, Colour and select a very close to dark color and tell me if it's uniform. Maybe there is something wrong only with my screen.
I'm not saying it's the worst screen ever, I'm just suggesting someone should take this minor downside into account when choosing this type of screen, because once you go AMOLED you never go back ;-). You may have second thoughts when some wear will start to appear on the pixels.
Sent from my GT-I9000 using XDA Premium App

Screen Brightness manipulation?

Is there any way with an app like AnyCut or SQLITE to edit a field to make the screen brighter? I know this may be a longshot, but with some of the other parts of the phone being capable of manipulation, I thought I'd at least ask. I understand the drain on the battery and possible other risks, but the screen, even at 100% brightness, seems to just not be that bright..
What? I can see my screen in bright clear skies daylight.... that's a bright screen! You live on Mercury or what?
If I stand outside with my screen set to 100% and auto turned off.. I have a hard time plaing contract killer because some of the characters become extremly hard to see.. If I play it on the galaxy tab in the same conditions, the characters are easy to see.. But it is true of most things I look at on the screen.. Out and about in direct daylight, the screen just isnt as bright as it needs to be..
That has nothing to do with screen brightness. The galaxy tab is a Super Amoled screen and the Thrill is LCD. That is why Samsung phones are more visible in direct sunlight too.
Sent from my LG Thrill 3D using XDA Premium
Im only interested in whether or not this can be accomplished..
It can't.
Sent from my LG Thrill 3D using XDA Premium
mrbarker said:
Im only interested in whether or not this can be accomplished..
Click to expand...
Click to collapse
Nope. Can't get any brighter then it is at full.
Sent from my LG-P920 using Tapatalk
moved thread to general-Q&A section
I wish mine would go dimmer. I like to keep it on auto and its usually pretty good but at night it keeps my screen way too bright. If I use the built in widget to toggle the brightness it just puts it too dim. The only way to get it to a decent dimness in the dark is to use the slider. I say the screen it too bright 90% of the time.
TylDurden said:
I wish mine would go dimmer. I like to keep it on auto and its usually pretty good but at night it keeps my screen way too bright. If I use the built in widget to toggle the brightness it just puts it too dim. The only way to get it to a decent dimness in the dark is to use the slider. I say the screen it too bright 90% of the time.
Click to expand...
Click to collapse
Now that is do-able. I'm not sure how to do it though. Cm7 has the option to adjust the auto-brightness levels based on specific light sensor values.
Sent from my LG-P920 using Tapatalk

Light bleed !!

Im very picky so first I notice a tiny chip in the surrounding metal and I can feel it by hand, but I thought oh well this is ok if the screen is perfect. but then when I turned the brightness to max, I noticed light bleed at the upper corner. It's also noticeable at 50%. RMA asap.. shame I just got it today, the replacement could take up to 3-5 weeks. Actually I ordered this for my bro who is oversea so I need to get the replacement before the last week of january for my uncle to bring it oversea to him, and this makes me worried if it takes till february. I don't wanna send a defected one to my bro and he's really looking forward to this.
IB4TL
This is the extent of my light bleed (pic below).
I've decided to keep it regardless; I don't invest much time looking at a blank screen when using my phone but if your brother does, godspeed and good luck.
ADJack said:
This is the extent of my light bleed (pic below).
I've decided to keep it regardless; I don't invest much time looking at a blank screen when using my phone but if your brother does, godspeed and good luck.
Click to expand...
Click to collapse
I have 3 noticeable light bleeds all on top. Nothing like the poster above me. But I'm definitely keeping mine.
Sent from my Nexus 4 using Tapatalk 2
Turn any LCD to full brightness and you get it, the only reason you don't see it from the media is they all have auto brightness on which solely exists to hide this IMO..
If it bothers you then use OLED.
The so called amazing Retina screens Apple have used have the same issue when you turn it up full brightness....
ADJack said:
This is the extent of my light bleed (pic below).
I've decided to keep it regardless; I don't invest much time looking at a blank screen when using my phone but if your brother does, godspeed and good luck.
Click to expand...
Click to collapse
Wao... actually mine is better than this (only 1 at the top right corner). But consider this is a phone ..light bleed is not acceptable whatsoever. On a tablet it might be ok. I can keep this N4 till I het the replacement. Hopefully the replacement will be better.
slannmage said:
Turn any LCD to full brightness and you get it, the only reason you don't see it from the media is they all have auto brightness on which solely exists to hide this IMO..
If it bothers you then use OLED.
The so called amazing Retina screens Apple have used have the same issue when you turn it up full brightness....
Click to expand...
Click to collapse
You might be right... I have a S3 and there's zero light bleed on every unit ive seen (3 total) since its amoled. Ive never owned a lcd phone so I dont know. But if this is a common issue for lcd screen then im ok with that. I just dont wanna buy a defected one.
slannmage said:
Turn any LCD to full brightness and you get it, the only reason you don't see it from the media is they all have auto brightness on which solely exists to hide this IMO..
If it bothers you then use OLED.
The so called amazing Retina screens Apple have used have the same issue when you turn it up full brightness....
Click to expand...
Click to collapse
Auto brightness exists to save battery and increase brightness only when necessary, not hide light bleed
I find auto brightness to be perfectly acceptable on my nexus 4 (way better than gnex) and notice no light bleed . only time I notice it is on the boot screen
Sent from my Nexus 4 using Tapatalk 2
I have similar light bleed on my screen but I never have my phone on full brightness and at auto I notice no light bleed so I am content with that. No other issues with the phone so will not be RMA it just incase I get a phone back with other problems.
ADJack said:
This is the extent of my light bleed (pic below).
I've decided to keep it regardless; I don't invest much time looking at a blank screen when using my phone but if your brother does, godspeed and good luck.
Click to expand...
Click to collapse
Yea, mine is a little less than that and im keeping it. The world is not gonna end if u have this. My gs2 had more and never notice it unless i want it to see it.
Sent from my Nexus 4 using xda app-developers app
lol.. will lg ever learn? this happened on the g2x (but worse).
I have a little on the top right of my screen. I do notice it, especially since I'm coming from an AMOLED screen. This phone is easy better, and I don't want to RMA it and chance getting one with a big problem. But my Nexus 7 uses an LCD a well, and there is absolutely no light bleed. My HTC ReZound had no light bleed, and neither did my LG Spectrum... both of which use 720p LCD panels, though slightly smaller ones. So, I'm a little frustrated. But, it's still the best phone I've ever used
Sent from my Nexus 4 using xda premium
stratax said:
lol.. will lg ever learn? this happened on the g2x (but worse).
Click to expand...
Click to collapse
Lol i was about to say the same thing ..the g2x was a triiiip
Sent from my Nexus 4 using xda app-developers app
rookiegenius said:
You might be right... I have a S3 and there's zero light bleed on every unit ive seen (3 total) since its amoled. Ive never owned a lcd phone so I dont know. But if this is a common issue for lcd screen then im ok with that. I just dont wanna buy a defected one.
Click to expand...
Click to collapse
any amoled cannot have light bleeding because the technology works differently.
LCD screens have a light behind a liquid display the display cannot emit light and requires an alternative light source to be behind it to shine through so think of it as a sandwich (backlight) / LCD / (glass)
ideally there should be material that prevents most of the light from escaping around the LCD itself however its not a 100% seal hence you get light on the edges; small devices like phones its more noticeable cause the light does not need to travel as far making the issue seem worse. generally this is a normal part of LCD technology however if it is EXTREME you should RMA some light bleeding is normal extreme light bleed is not.
AMOLED Does not have a back light so there is no external light source that can leak out around the screen itself instead the individual pixels emit the light hence AMOLED will never have light bleeding.
so if you have a little light bleed dont RMA you might get something worse and yours is most likely fine; your just complaining about a normal and acceptable flaw in LCD tech.
I've owned 3 different n4's and they all had light bleed. Noticed all had them in the right top corner, with one unit having more bleed at the bottom left. Don't rma it unless it's pretty bad

Auto brightness

Just asking if anybody can reproduce this: with auto brightness turned on, if I go from a dark to bright room, brightness increases.
When I go from bright to dark room, brightness stays constant at the setting in the bright room.
On note 3, I read that it will only go from bright to dark only if the phone is less than 30 degrees tilted.
Can anybody test this out?
Mine dims like it should. You might have defective sensor or are using a poor made case
BAD ASS NOTE 4
BACARDILIMON said:
Mine dims like it should. You might have defective sensor or are using a poor made case
BAD ASS NOTE 4
Click to expand...
Click to collapse
Sensor is working properly. I'm using the samsung case.
When I use lux, it works perfectly so I'm trying to diagnose the problem.
Looks mine does same thing. Maybe there is no enough difference between both rooms. I noticed one thing. Going from dark to bright - screen brightness increases, from bright to dark - stays the same. If I turn off screen and turn on again (in darker room) it wakes up dimmer.
Sent from my SM-N910T using XDA Free mobile app
darekz said:
Looks mine does same thing. Maybe there is no enough difference between both rooms. I noticed one thing. Going from dark to bright - screen brightness increases, from bright to dark - stays the same. If I turn off screen and turn on again (in darker room) it wakes up dimmer.
Sent from my SM-N910T using XDA Free mobile app
Click to expand...
Click to collapse
For some reason, if the phone is on the table and I turn the light on and off, it works perfectly. Don't know if it's by design or what.
Thanks for checking though.
http://forum.xda-developers.com/galaxy-s5/help/auto-brightness-t2956022

[Q] Planning to grab the Nexus 6, few questions before

Hi,
I'm planning to get the 64GB Blue Nexus 6 and i have a few questions before i buy:
I heard that the AMOLED Screen have some issues like burns on the screen. Is that true?
Also i heard about "pink" issues with brightness. This is true also?
Svid said:
Hi,
I'm planning to get the 64GB Blue Nexus 6 and i have a few questions before i buy:
I heard that the AMOLED Screen have some issues like burns on the screen. Is that true?
Also i heard about "pink" issues with brightness. This is true also?
Click to expand...
Click to collapse
Both are true.. But I don't have any issues on my device..
Danish2980 said:
Both are true.. But I don't have any issues on my device..
Click to expand...
Click to collapse
I saw some videos on youtube and they said inverting colors from time to time for a certin amount of time helps. This is true?
Svid said:
I saw some videos on youtube and they said inverting colors from time to time for a certin amount of time helps. This is true?
Click to expand...
Click to collapse
Also true..
Svid said:
Hi,
I'm planning to get the 64GB Blue Nexus 6 and i have a few questions before i buy:
I heard that the AMOLED Screen have some issues like burns on the screen. Is that true?
Also i heard about "pink" issues with brightness. This is true also?
Click to expand...
Click to collapse
The at&t variant I personally own never gave me these issues. I have read the pink tint issues were associated with the adaptive /automatic brightness enabled?! Yet, on mine I saw no pink with it enabled or disabled.
And there are videos on YT showing burn in. It is basically the soft keys at the bottom. Triangle, circle, and the square are the culprits. But again no issues for me.
Now the very 1st day my phone did a random reboot on me - twice! But, as soon as I unlocked bootloader, rooted it, and used a custom recovery the reboots never surfaced again! Go figure?! And the nexus 6 is definately the fastest performing phone I owned yet
Svid said:
Hi,
I'm planning to get the 64GB Blue Nexus 6 and i have a few questions before i buy:
I heard that the AMOLED Screen have some issues like burns on the screen. Is that true?
Also i heard about "pink" issues with brightness. This is true also?
Click to expand...
Click to collapse
AMOLED's can all have that issue, but I personally have never seen it happen (I have had a gnex for almost 2 years which used AMOLED and doesn't have burn-in). The pink "issue" isn't really an issue, google allowed the screen brightness to go extremely dark on the N6. This causes the screen to take on a pink tint simply due to the way amoled's function at that low a brightness. The screen does have a warmer hue to it as well because it is AMOLED, but you can use a custom kernel to tweak RGB values and give the screen a cooler tint. Hope that helps
gambit07 said:
AMOLED's can all have that issue, but I personally have never seen it happen (I have had a gnex for almost 2 years which used AMOLED and doesn't have burn-in). The pink "issue" isn't really an issue, google allowed the screen brightness to go extremely dark on the N6. This causes the screen to take on a pink tint simply due to the way amoled's function at that low a brightness. The screen does have a warmer hue to it as well because it is AMOLED, but you can use a custom kernel to tweak RGB values and give the screen a cooler tint. Hope that helps
Click to expand...
Click to collapse
Thank you for that useful information mate.
So, all AMOLED's, regardless if it's the N6 or not, suffer from this issue?
Svid said:
Thank you for that useful information mate.
So, all AMOLED's, regardless if it's the N6 or not, suffer from this issue?
Click to expand...
Click to collapse
That is correct, all AMOLED's are susceptible to this because of the O in AMOLED, which stands for Organic. The organic compounds that are used in these screens are susceptible to burn in due to the fact that the organic compounds degrade with a lot of use. Of the RGB subpixels, Blue subpixels degrade quickest. However, the N6 uses a Pentile pixel arrangement. This has upsides and downsides, but it is actually an upside as far as this issue is concerned, because the Pentile layout contains less blue subpixels, so there is less susceptibility to burn in.
If you want to combat this issue further, you can use blacked out google apps, and use ROM's with blacked out system options, use a mostly black wallpaper, etc. This is because on an AMOLED screen when the screen is black, the pixels are not displaying any light and thus are not degrading at all. This should reduce your chances of running into the issue. It will also save battery life since the screen is not using as much energy. That is one of the upsides to AMOLED screens, along with the very dark blacks you get in movies and games for the same reason (pixels are not lighting at all). Like I said, I've used other AMOLED screens and not run into this problem as of yet, to my understanding it should take years before you start to see burn in even with normal use. Some people say they have issues right away but that has not been my experience.
All screens of any technology are correctly color calibrated at a given brightness and are very far off at extremes. With an LCD, it will generally be too blue at high brightness and not blue enough at low brightness. That is because the backlights are never a 6500K source. They are basically always bluer than standard.
The Note 4, to pick an AMOLED example, does not get red at very low brightness, but that is because it (according to others) has a higher minimum brightness. My screen takes on a red tint when in a dark room with adaptive brightness enabled if I have the brightness slider set below about 30%. I consider this a handy feature since I don't like the feeling of staring into a light bulb.
Above about 30%, or in a room with a light on, the screen stays normal for me.
I have not seen thecpink issue on my N6 at all.
gambit07 said:
That is correct, all AMOLED's are susceptible to this because of the O in AMOLED, which stands for Organic. The organic compounds that are used in these screens are susceptible to burn in due to the fact that the organic compounds degrade with a lot of use. Of the RGB subpixels, Blue subpixels degrade quickest. However, the N6 uses a Pentile pixel arrangement. This has upsides and downsides, but it is actually an upside as far as this issue is concerned, because the Pentile layout contains less blue subpixels, so there is less susceptibility to burn in.
If you want to combat this issue further, you can use blacked out google apps, and use ROM's with blacked out system options, use a mostly black wallpaper, etc. This is because on an AMOLED screen when the screen is black, the pixels are not displaying any light and thus are not degrading at all. This should reduce your chances of running into the issue. It will also save battery life since the screen is not using as much energy. That is one of the upsides to AMOLED screens, along with the very dark blacks you get in movies and games for the same reason (pixels are not lighting at all). Like I said, I've used other AMOLED screens and not run into this problem as of yet, to my understanding it should take years before you start to see burn in even with normal use. Some people say they have issues right away but that has not been my experience.
Click to expand...
Click to collapse
Not sure about the bottom paragraph, surely you mean inverted colours? Also If you use a mostly black wallpaper you're more likely go get burn in because the pixels around navigation buttons aren't on at all and are thus not degrading whilst the navigation buttons are fully on and are degrading.
Sent from my Nexus 6 using XDA Free mobile app
letom said:
Not sure about the bottom paragraph, surely you mean inverted colours? Also If you use a mostly black wallpaper you're more likely go get burn in because the pixels around navigation buttons aren't on at all and are thus not degrading whilst the navigation buttons are fully on and are degrading.
Sent from my Nexus 6 using XDA Free mobile app
Click to expand...
Click to collapse
Inverted, blacked out, I don't think there's a difference. The button icons themselves will eventually burn in because they are almost always on unless you opt for pie like controls, but like I said that should be over a span of years. A black background will keep everything else from wearing faster though and should give you better battery performance.
I have had the phone for a week now and have not seen either of these issues. I do keep my screen fairly dim, like minimum brightness PLUS a screen dimmer for the nights and early mornings. I do not see any pink what so ever with adaptive brightness off and the minimum setting for brightness. I only turn the screen up when outdoors. I don't know I just find the screen really bright while indoors and I would assume burn in would be more susceptible with higher brightness
So i can safely buy the device right?
Anyway i have to order the phone overseas (No 64GB avalible in my country and the price tag too high anyway).

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