[Q] Super AMOLED - Black = off or still on? - Galaxy Tab S Q&A, Help & Troubleshooting

I'm looking into purchasing the Galaxy Tab S 8.4, but one of my big uses is for reading on the Kindle app. Currently, on my LCD device I read with a black background and white text to reduce the light emitted as I do a lot of reading before bed, but it still is a lot of light which can keep my wife awake. Does the Galaxy Tab S actually turn off the pixels producing black, or is just very, very dark? I know AMOLED is supposed to turn them off, but I've heard conflicting reports that some devices do and some don't. Would someone be able to load up the Kindle app and set it to black with white text and let me know if it actually shuts off the pixels so it wouldn't be as bright in a dark room?
Thanks!

The Kindle app set to black background truly gives a black background, if set to use system brightness you can also get a very dim white for the text. If looking at something like the dark theme in Tapatalk you don't get black, the background is a dark grey. A bonus of running the kindle app like this is that battery life should be extended, compared to using a white background.
Sent from my SM-T700 using Tapatalk

ArcSyn said:
I'm looking into purchasing the Galaxy Tab S 8.4, but one of my big uses is for reading on the Kindle app. Currently, on my LCD device I read with a black background and white text to reduce the light emitted as I do a lot of reading before bed, but it still is a lot of light which can keep my wife awake. Does the Galaxy Tab S actually turn off the pixels producing black, or is just very, very dark? I know AMOLED is supposed to turn them off, but I've heard conflicting reports that some devices do and some don't. Would someone be able to load up the Kindle app and set it to black with white text and let me know if it actually shuts off the pixels so it wouldn't be as bright in a dark room?
Thanks!
Click to expand...
Click to collapse
I could say that this is true black. Comoared to my old 7.7 which gives a slight glow when displaying pure black. This one seems like the screen is off

Armpowered said:
The Kindle app set to black background truly gives a black background, if set to use system brightness you can also get a very dim white for the text. If looking at something like the dark theme in Tapatalk you don't get black, the background is a dark grey. A bonus of running the kindle app like this is that battery life should be extended, compared to using a white background.
Sent from my SM-T700 using Tapatalk
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Click to collapse
Same here. What he said. Your wife will be happy.

Related

Notification light colors?

What are all of the colors that people have found out can be make from the notification light? So far ive gotten green,blue,red,light blue, light green, and a weird light green with orange dot in the middle color.
X-dude said:
What are all of the colors that people have found out can be make from the notification light? So far ive gotten green,blue,red,light blue, light green, and a weird light green with orange dot in the middle color.
Click to expand...
Click to collapse
Do you have White or Titanium ?
Lol, only three, R G B.
There is no light blue or light green, just your proximity sensor dimming the colour depending on your ambient lighting intensity. Dark room, light led, bright room, bright led.
To get custom colours, you need third party apps like Light Manager or Light Flow. However, after using Light Flow for a day, I can say, other than R G B, no colour appear to be prominent! But I've also heard this is a problem with the Grey units, but White ones, on white ones colours come out perfect it has been mentioned.
Sent from my GT-N7100
I have a white one and I can make every color but no shades.
GNoteII
The only accurate color other than r g b that the grey version is capable of is cyan. The rest are ****.
Sent from my Note II using Tapatalk
i thought LED can mix any color u like by RGB, depends on the kernel
btw, i just saw white, blue, green and red appeared on my note2
For those using Light Manager and/or Light Flow, which one has the best results on Galaxy Note 2? Any issues?
I'm reading A LOT of bad comments on Brazilian Play Store from S III users about Light Flow, and I'm afraid of messing up things here!
Don't be afraid of messing anything, if something goes wrong just uninstall the app.
And afaik, Light Manager is more consistent than Light Flow. It doesn't mess with your 'Accessibility' options. But I've seen that it drains battery in advanced mode, so better use it in Normal mode.
Sent from my GT-N7100
jujuburi said:
Don't be afraid of messing anything, if something goes wrong just uninstall the app.
And afaik, Light Manager is more consistent than Light Flow. It doesn't mess with your 'Accessibility' options. But I've seen that it drains battery in advanced mode, so better use it in Normal mode.
Sent from my GT-N7100
Click to expand...
Click to collapse
Thanks!
I was afraid because I read some comments related to an issue that messed up colors "forever". And something like eternal notifications until reboot. Of course, these could be solved with a full wipe.
Thanks for the reply.. it helps. .
Sent from my GT-N7100 using xda app-developers app

[Q] Red/Night Filter Screen App?

Just got my new Nexus 7 2013, which will be used in my car a lot for music and nav. My car's interior lighting is red, so I was wondering if there's an app that can change everything onscreen to red. I used to use Chainfire 3D on my old tablets, which had a setting for this, but it's not compatible with JB. I know there are other apps that will add a red tint (Lux, Filter Your Screen, etc.), but they don't make it a true red like Chainfire. Hell, they even make the screen brighter by turning black into dark red. A current app that does what I want is Galactic Night, but it's only for Samsung Galaxy devices.
Any suggestions?
Blue Bomber said:
Just got my new Nexus 7 2013, which will be used in my car a lot for music and nav. My car's interior lighting is red, so I was wondering if there's an app that can change everything onscreen to red. I used to use Chainfire 3D on my old tablets, which had a setting for this, but it's not compatible with JB. I know there are other apps that will add a red tint (Lux, Filter Your Screen, etc.), but they don't make it a true red like Chainfire. Hell, they even make the screen brighter by turning black into dark red. A current app that does what I want is Galactic Night, but it's only for Samsung Galaxy devices.
Any suggestions?
Click to expand...
Click to collapse
Try Night Filter. Its free on the Play Store and you can set whichever colour overlay you want. Not sure if that's exactly what you're after but it supports opacity of the overlay and colour, works for me at night! Here's the link: https://play.google.com/store/apps/details?id=com.digipom.nightfilter&hl=en

Samsung Galaxy Nexus - Blue Line on Screen Edges Issue

Greetings,
I just purchased my Samsung Galaxy Nexus but I noticed after some months of use, some strange blue lines that appears only on blue, grey or specially light colors as white backgrounds. I am very upset since I bought this good cellphone but noticed the screen issue. People told me that those blue lines where just a software problem but the thing is that I recently upgraded from 4.2 JellyBean to 4.4 KitKat and those annoying lines still appear on specific backgrounds. I forgot to mention that those blue lines appear in full-screen mode where the notification and the digital buttons bar are when they hide while in that mode, for example: when playing games, visualizing text or images, watching videos on Youtube (all of it in full-screen mode). You got the idea, right? Its like when the full-screen mode is on and the functional bars of the Nexus fade, it is supposed to be the same color as the whole background, but not; it appears like a tone of blue instead. This has nothing to do with the camera by the way.
I now think that the issue is related to some problem with the screen and hardware. I don't really want to replace the whole screen with a new one since Nexus screens are very expensive. I can't claim a warranty as well.
So, the questions are:
¿Does anybody have or have had the exact or similar issue as me?
¿Can someone please explain me what's going on and give me a solution?
I will leave few images bellow where the blue line is more visible:
1st Picture: When Youtube is loading the video, the notification and digital-button bar are gonna fade to play the video in full-screen mode.
2nd Picture: While the video is playing in full-screen mode, on the edge of the screen where previously was the notification bar, the blue line appeared, you can see it easily.
3rd picture: While reading any type of text or viewing a picture in full-screen mode where the notification and digital-buttons bar fade, the blue line appears again and its very easy to see it.
4th Image: This case is different, on a background with dark blue and black colors, there is some blue tint effect that is slightly notorious, the picture taken from the camera doesn't show it very well.
Same here
Sent from my Galaxy Nexus using Tapatalk
exkubik said:
Same here
Sent from my Galaxy Nexus using Tapatalk
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Click to collapse
Yeah dude, it really sucks and its kinda annoying when watching videos or reading something. Google should make something about it on future cellphones!
If you fix it or at least reduce the blue shadow a little please notice me, I am very upset about it. :crying:
My „blue lines” appeared after I dropped the phone
Seems like standard Galaxy Nexus AMOLED burn-in. Try something like this but dont expect too much.
Screen burn in. I have it too. There's no fixing it on an AMOLED display without replacing the screen. This is my first and last device I will buy with AMOLED.

[Q] Background color for Google Play Books with T700

I use my Android tablets for reading, using Google Play Books. I prefer a bright white background. With my Nexus 7 (2013) it's a pure white background, just the way I like it. With the Tab S 8.4 I can't seem to achieve bright white. It's more like a light sepia. I know sepia is a choice but that's a very dark (to my eyes) background. I've also played around with the Screen Mode but none of the choices seem to change the GPB background at all. I've turned Reading Mode on and off but I don't see any difference.
I know there are other reading apps but I like having a large library stored in the Google cloud and the ability to switch devices and have the bookmark change with it.
Any suggestions on how to change the background color for just Google Play Books?
I'm having the same problem with my Galaxy Tab 4 7.0". I've tried everything you have and it also doesn't work. I've also noticed that when I click the home button on my device it turns bright white just before closing so I know that the app and device are capable of displaying the correct color.
I know this isn't an answer to your question, just letting you know that you're not the only one. In fact your post is the first I've seen about this issue and I've been Google searching different variations of the question.
Those are my settings, and whites are white as should be.
kekinash said:
Those are my settings, and whites are white as should be.
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Click to collapse
Yep same thing, plus reading mode is off for me. Whites are whites for me ☺
Sent from my SM-T800 using Tapatalk
kekinash said:
Those are my settings, and whites are white as should be.
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Click to collapse
I seem to get better whites with Basic rather than Cinema. When I use Cinema white has a strong blueish tint, especially on video. Whites on Basic are fine while watching movies, YouTube, etc. Google Play Books is now better with Basic and Reading Mode off but it's still not as bright a white as I would like.
For example, I was watching Ex Machina. An early scene has a helicopter flying over a glacier. With Cinema it looked like a sea of blue. I changed to Basic and the snow and ice turned white. You lose the oversaturated colors with Basic but the blueish whites really bother me on the other settings.

Night mode isn't as dark

Lying in bed last night I turned on Night Mode. I noticed when I pulled down the notification shade, the top portion was still dimly back lit, so I could see the camera cutout and the edges of the screen, no matter how much I dim the backlight.
Well tonight I fired up my Note 9, put it on Night Mode and pulled down the notification shade, and no matter how bright or dim I have the screen, the top part is BLACK. no light. You can't see where the screen ends and the frame begins.
This isn't a huge deal except for battery savings. When an AMOLED screen is true black, those prices shut off. But since the night mode on the N10+ isn't true black those pixels are still lit up and using power.
When viewing video in Netflix or YouTube the black bars are truly black, so I know the screen is capable showing true blacks, I'm just not sure why Sammy changed Night mode so it's no longer truly black.
I have just experienced the same thing. I have a note 9 as well to compare. I'm actually deeply disappointed. I also noticed screen mode only has 2 options... vivid and natural. Where as note 9 has 4 screen modes. I'm trying to figure things out to see if I can get it to be true black.
It's probably normal since it's a night mode and not a black mode ; in which you wouldn't it to make your screen showing heavy contrasted differences that actually made more eye fatigue than the light one.
Maybe I'll finally like this mode on this new phone.
Nastrahl said:
It's probably normal since it's a night mode and not a black mode ; in which you wouldn't it to make your screen showing heavy contrasted differences that actually made more eye fatigue than the light one.
Maybe I'll finally like this mode on this new phone.
Click to expand...
Click to collapse
No I understand it's a "Night mode" but I'm comparing it to the Note 9 and Note 8 Night mode where it became a true black. And I ran it in Night mode almost 24/7 for some battery savings as well. Well that doesn't work if Night Mode is just a dark grey rather than a true black.
And I'm not sure how true black and contrast made for more eye fatigue? Have you never watched a 4K movie? The whole point of high def is high contrast with true deep blacks, bright whites, and bright colors.
I also noticed on the quick access home screen in Samsung Browser on dark mode, it's not longer a true black. Now if you turn on High Contrast mode in the browser settings, then the background is a true black, so that panel is capable of turning off the pixels and going true black. This means it was an obvious design choice.
Mr. Orange 645 said:
No I understand it's a "Night mode" but I'm comparing it to the Note 9 and Note 8 Night mode where it became a true black. And I ran it in Night mode almost 24/7 for some battery savings as well. Well that doesn't work if Night Mode is just a dark grey rather than a true black.
And I'm not sure how true black and contrast made for more eye fatigue? Have you never watched a 4K movie? The whole point of high def is high contrast with true deep blacks, bright whites, and bright colors.
I also noticed on the quick access home screen in Samsung Browser on dark mode, it's not longer a true black. Now if you turn on High Contrast mode in the browser settings, then the background is a true black, so that panel is capable of turning off the pixels and going true black. This means it was an obvious design choice.
Click to expand...
Click to collapse
Dark VS black doesn't make much difference battery wise on OLED screens (let me just find the test back and I'll update my post)
Because the notification panel and anywhere else that it matters contains mostly texts and it produce visual retina persistence (not sure if I translated well), plus it's more annoying to read and and eyes accommodate less than in light mode where everything is light too.
There's nothing to do with movies since it's dynamic and constantly changing from a lot of different colours while texts are more static (but going from dark to light scene still hurts)
I agree that it's absolutely a design choice, but in my opinion for the better.
Nastrahl said:
Dark VS black doesn't make much difference battery wise on OLED screens (let me just find the test back and I'll update my post)
Because the notification panel and anywhere else that it matters contains mostly texts and it produce visual retina persistence (not sure if I translated well), plus it's more annoying to read and and eyes accommodate less than in light mode where everything is light too.
There's nothing to do with movies since it's dynamic and constantly changing from a lot of different colours while texts are more static (but going from dark to light scene still hurts)
I agree that it's absolutely a design choice, but in my opinion for the better.
Click to expand...
Click to collapse
I gotcha. Makes sense. I'd like to see some tests on black vs dark. I had always heard and though the battery savings was due to the pixels shutting off. It's why the AOD is black and not just dark.
Buts also weird. I'm replying to this direct from the Gmail notification of your reply. So it opened up the webpage in the webview. Well the top bar above the page that says reply to topic and has had the Gmail overflow button is true black. But the status bar right above it is dark grey.
I guess what bugs me most is it makes the camera cutout stick out, even in the dark. Because I look up an I see a true black for on a dark charcoal background. And I can see the screen edges. I preferred on the Note 9 where it all just blended away with the true black.
But yet, when I watch a movie, the status bar DOES turn off completely and you can't see the camera cutout. Just can't figure out the inconsistency.
Mr. Orange 645 said:
I gotcha. Makes sense. I'd like to see some tests on black vs dark. I had always heard and though the battery savings was due to the pixels shutting off. It's why the AOD is black and not just dark.
Buts also weird. I'm replying to this direct from the Gmail notification of your reply. So it opened up the webpage in the webview. Well the top bar above the page that says reply to topic and has had the Gmail overflow button is true black. But the status bar right above it is dark grey.
I guess what bugs me most is it makes the camera cutout stick out, even in the dark. Because I look up an I see a true black for on a dark charcoal background. And I can see the screen edges. I preferred on the Note 9 where it all just blended away with the true black.
But yet, when I watch a movie, the status bar DOES turn off completely and you can't see the camera cutout. Just can't figure out the inconsistency.
Click to expand...
Click to collapse
It may be because apps got their own night mode colour settings embedded, while all One UI apps got theirs which are different.
Like, if for Google night mode is all black, their apps will just check about system UI night mode trigger and of its on, apply their own settings.
I can only find that reason for it to be such inconsistent.
Nastrahl said:
It may be because apps got their own night mode colour settings embedded, while all One UI apps got theirs which are different.
Like, if for Google night mode is all black, their apps will just check about system UI night mode trigger and of its on, apply their own settings.
I can only find that reason for it to be such inconsistent.
Click to expand...
Click to collapse
That's a good point/thought. I hadn't thought of that. Damn...I just like consistency, LOL.
Mr. Orange 645 said:
That's a good point/thought. I hadn't thought of that. Damn...I just like consistency, LOL.
Click to expand...
Click to collapse
I totally understand and agree ! Especially when you like what Samsung did with their UI
In an other hand, there's some third party theme that may be of use to have a black theme : https://forum.xda-developers.com/s10-plus/themes/theme-anxious-t3921645
I don't know if it's working for the Note 10 yet but I think it's just a matter of time before it do
Nastrahl said:
I totally understand and agree ! Especially when you like what Samsung did with their UI
In an other hand, there's some third party theme that may be of use to have a black theme : https://forum.xda-developers.com/s10-plus/themes/theme-anxious-t3921645
I don't know if it's working for the Note 10 yet but I think it's just a matter of time before it do
Click to expand...
Click to collapse
I'm using #hex_ and it works very well on Note10+.
Wysłane z mojego SM-N975F przy użyciu Tapatalka
I just use a theme that's mostly black everywhere. No need for night mode..
One UI notification shade isn't actually black for any of the devices on the One UI. I had an S8+ before this and it looked black but if you take a screenshot and measure the color value, you'll see that it's not black. You can do the same thing on your Note 9. Take a screenshot and extract the color value. Or take a screenshot and then transfer that screenshot to the Note 10 and view it on the Note 10. I guarantee that the Note 9 screenshot of the notification shade will look like the Note 10 notification shade. Black will cause AMOLED smearing which isn't good look.
jkgao said:
One UI notification shade isn't actually black for any of the devices on the One UI. I had an S8+ before this and it looked black but if you take a screenshot and measure the color value, you'll see that it's not black. You can do the same thing on your Note 9. Take a screenshot and extract the color value. Or take a screenshot and then transfer that screenshot to the Note 10 and view it on the Note 10. I guarantee that the Note 9 screenshot of the notification shade will look like the Note 10 notification shade. Black will cause AMOLED smearing which isn't good look.
Click to expand...
Click to collapse
So I tried this. Set my Note 9 to Night Mode and took a screen shot. Sent it to my N10+. Guess what? The notification shade in my Note 9 screen shot is pure black when viewed on my N10+ screen.
So I did the opposite. Took a screen shot of N10+ notification shade and sent it to my Note 9, and it appears dark grey.
So I'm not saying you're WRONG, but this is proof that the notification shade on Night Mode on the Note 9 (and the Note 8) was SIGNIFICANTLY darker than the N10+. If they aren't true black, then they are so close at to be indistinguishable from it, whereas the N10+ is definitely lighter than black.
I also just used an app to do a color value sample on my screenshots. Note 9 notification shade is #00000. I believe that is true black?
See my attached screenshots. War Machine is Note 9 (The one with the true black notification shade) and the Darth Vader is the Note 10+ (the one with the dark grey notification shade)
To see what I'm talking about, you may need to turn brightness up on your phone or go in a dark room.
Screenshots of color picker showing Note 9 notification shade is #00000 (true black) and Note 10+ is #080808 (not true black).
koppee1 said:
I just use a theme that's mostly black everywhere. No need for night mode..
Click to expand...
Click to collapse
I tried this. The notification shade was still dark grey, not black.
Samsung doesn't use black on the N10, it's that simple. They use a form of grey that's fairly close to pure black, however. The avg person probably uses white themes, so I doubt many will take notice.
Mr. Orange 645 said:
I tried this. The notification shade was still dark grey, not black.
Click to expand...
Click to collapse
Look for a different theme. There are black ones. I'd post mine but I can't seem to post screenshots here.
koppee1 said:
Look for a different theme. There are black ones. I'd post mine but I can't seem to post screenshots here.
Click to expand...
Click to collapse
It's all good. I fixed it with GoodLock. I have my stock theme and a true black notification shade again.
Thanks!!
Mr. Orange 645 said:
It's all good. I fixed it with GoodLock. I have my stock theme and a true black notification shade again.
Thanks!!
Click to expand...
Click to collapse
Write back when you find a solution to make samsung browser black.cheers.
As Nastrahl pointed out it the pixels don't need to be completely off to save a lot of power. I was going for total black but since I adjust brightness manually a little bit of tint to the black looks nicer and makes it easier to gauge the brightness.
You can use the Good lock app Quickstar to make the pull down notification panel any color or darkness level you want. Mine is almost black with a hint of forest green.
My wallpaper is even darker with the same green tint.
When the brightness is too high the wallpaper's green tint is noticeable otherwise it looks black.

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