Develop Bugs

DARK vs LIGHT Theme Battery Stats on SAMOLED

As most of us already know, Samsung's SAMOLED displays are more efficient than LED-backlit LCD displays (HTC One X, Moto Razor, etc), because backlit displays are always on even when showing a black image (no local dimming yet?), whereas AMOLED only uses energy when individual pixels actually need to emit light. What I didn't know until today, though, is precisely how much battery you could save with AMOLED by using dark-themes instead of bright light-themes & wallpapers, etc. I had assumed the difference was in the low single-digit percentage range, and I assumed wrong
I simply timed how long it took the battery to drain 5% with the screen always on at various brightness levels and while viewing an all white or all black 720p image fullscreen in QuickPic. All tests were performed on a freshly-rebooted AT&T SGS3 running CM10 Nightly (20120911) with a 2.5-month old stock battery. 4G, WiFi, & sync were enabled. No CPU hogs were running.
I used the following to log the phone's battery level every 10 seconds via adb over wireless. (If I were to do this over again, I'd instead spend a few hours writing a simple app to automate the process for hands-free accuracy, instead of doing it manually):
Code:
$ while true; do printf "%s\t%s\n" "$(adb shell dumpsys battery|grep level|awk '{print $2}')" "$(date)"; sleep 10; done
98 Mon Sep 11 15:59:30 EDT 2012
CONCLUSION:
In the best-case scenario, a SGS3 with its SAMOLED display showing dark content instead of light content gains about an extra 3 hours of screen-on battery time, no matter what your brightness is set to. A backlit LCD display would show no difference. So, in order to squeeze a couple more hours out of your battery, it's smart to use DARK wallpapers, DARK ROM themes, DARK App settings, and DARK-themed Google Apps (like JustinBean's Inverted GAPPS package :highfive: )
And here's a screenshot my spreadsheet just so you can see the data:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Experiment over. HTH.
Feel free to verify my results yourself...

zmore said:
As most of us already know, Samsung's SAMOLED displays are more efficient than LED-backlit LCD displays (HTC One X, Moto Razor, etc), because backlit displays are always on even when showing a black image (no local dimming yet?), whereas AMOLED only uses energy when individual pixels actually need to emit light. What I didn't know until today, though, is precisely how much battery you could save with AMOLED by using dark-themes instead of bright light-themes & wallpapers, etc.
Click to expand...
Click to collapse
Your first sentence I bolded is probably not true.
See:
http://www.anandtech.com/show/6022/samsung-galaxy-s-iii-review-att-and-tmobile-usa-variants/3 - One X with 4.7" LCD and smaller battery capacity lasts longer than Galaxy S III 4.8" SAMOLED with larger battery capacity in an internet test that is constrained by the power drain of the screens.

Milk Tea said:
Your first sentence I bolded is probably not true.
See:
http://www.anandtech.com/show/6022/samsung-galaxy-s-iii-review-att-and-tmobile-usa-variants/3 - One X with 4.7" LCD and smaller battery capacity lasts longer than Galaxy S III 4.8" SAMOLED with larger battery capacity in an internet test that is constrained by the power drain of the screens.
Click to expand...
Click to collapse
Here I was testing apples to apples by only changing ONE variable at a time on the same device, and not apples to oranges (different CPU & h/w components, different Android OS, amount of RAM, etc...).

Cool scientific research! Write a paper on it! Yay!
---------- Post added at 11:19 AM ---------- Previous post was at 11:17 AM ----------
Browser test should be done in dark Opera browser. There is usercss.css file available which makes Opera dark. Anandtech tests stock nonmodified phones - so it suxxx.

very interesting information.
i've used devices with lcd screen and the gs3 is my first amoled screen. my impression was that i noticed the display wasn't always the number 1 battery drainer on my old atrix like it is on my gs3. even though oled based screens don't use as much battery to display blacks, during average screen usage most apps use lighter colors apposed to darker colors so this really can't be taken to its full advantage. fortunately there are some apps that i use very often like tapatalk where you can apply a dark theme and save some juice.
mabey in the future as oled screens become more popular, mobile developers will take advantage of darker themes.

Nice I added this to my op
Sent from my SGH-I747 using Tapatalk 2

Thanks for the information...

Awesome post man. Makes total sense and nice to see data on this subject. Cheers!

[Q] LG G3 Resolution decreased to 1080 after replacing full LCD Screen!!

after I changed my cracked LG G3 LCD Screen with an original new one bought from eBay, I found that the resolution is decreased to 1080 on a 2K video on YouTube which I used to watch it on normally, then I thought it might require factory reset, but problem still on.
Please Help me.
p.s: Can I know with another way if my screen resolution is 2K (1440) other than YouTube.

abusraaj said:
after I changed my cracked LG G3 LCD Screen with an original new one bought from eBay, I found that the resolution is decreased to 1080 on a 2K video on YouTube which I used to watch it on normally, then I thought it might require factory reset, but problem still on.
Please Help me.
p.s: Can I know with another way if my screen resolution is 2K (1440) other than YouTube.
Click to expand...
Click to collapse
doesnt make scene..

abusraaj said:
after I changed my cracked LG G3 LCD Screen with an original new one bought from eBay, I found that the resolution is decreased to 1080 on a 2K video on YouTube which I used to watch it on normally, then I thought it might require factory reset, but problem still on.
Please Help me.
p.s: Can I know with another way if my screen resolution is 2K (1440) other than YouTube.
Click to expand...
Click to collapse
Youtube app lost the ability to play 1440p with latest update.
There is no 1080p panels for g3, and software is set for 1440p.
You definitely have 2K panel.

abusraaj said:
after I changed my cracked LG G3 LCD Screen with an original new one bought from eBay, I found that the resolution is decreased to 1080 on a 2K video on YouTube which I used to watch it on normally, then I thought it might require factory reset, but problem still on.
Please Help me.
p.s: Can I know with another way if my screen resolution is 2K (1440) other than YouTube.
Click to expand...
Click to collapse
Install CPU-Z
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"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Sent from my LG-D855 using Tapatalk

BioVolt said:
Install CPU-Z
Sent from my LG-D855 using Tapatalk
Click to expand...
Click to collapse
CPU-Z isn't accurate, the display is 1440x2560 not what its reflecting which doesn't make sense.

I'm pretty sure it is a YouTube bug
Its the same for me too
Sent from my LG-D852 using XDA Free mobile app

Pilz said:
CPU-Z isn't accurate, the display is 1440x2560 not what its reflecting which doesn't make sense.
Click to expand...
Click to collapse
Actually, it is accurate, it reports actual screen estate, as such, it is 2437 which is the screen minus the top and bottom bar.
Or at least that's how I understood it to be.
Sent from my LG-D855 using Tapatalk

BioVolt said:
Actually, it is accurate, it reports actual screen estate, as such, it is 2437 which is the screen minus the top and bottom bar.
Or at least that's how I understood it to be.
Sent from my LG-D855 using Tapatalk
Click to expand...
Click to collapse
That makes more sense, but does it do that for other phone with on screen buttons? I can try hiding them to see if it makes a difference. I don't recall the exact dimensions of the bar.

Does the nougat update fix the youtube lip sync issue?

Also does nougat allow you to calibrate the color of the screen?

Yes it fixes the sync. No unfortunately no calibration of screen just the regular two modes. I also want color control as I want to make my screen a little cooler. We can just hope for a custom kernel in the future that allows this. ElementalX dev has stated he won't make anything for the P2.

dannejanne said:
Yes it fixes the sync. No unfortunately no calibration of screen just the regular two modes. I also want color control as I want to make my screen a little cooler. We can just hope for a custom kernel in the future that allows this. ElementalX dev has stated he won't make anything for the P2.
Click to expand...
Click to collapse
Good to know the YouTube issue is fixed. God damn it I ****ing hate amoled screen, my screen has an annoying yellow tint, I might want to return it

linkzex said:
Good to know the YouTube issue is fixed. God damn it I ****ing hate amoled screen, my screen has an annoying yellow tint, I might want to return it
Click to expand...
Click to collapse
If mine would had been just a tad warmer I would have thought about doing the same. But in "vibrance" mode it's good enough (barely). I can stand it as the eye gets a little used to it.
There are ways to make it a little cooler anyway. Check the app Screen Balance. It will mess with your blacks but not very much if you keep the opacity <50%. It's a tradeoff but it can help.

dannejanne said:
If mine would had been just a tad warmer I would have thought about doing the same. But in "vibrance" mode it's good enough (barely). I can stand it as the eye gets a little used to it.
There are ways to make it a little cooler anyway. Check Screen Balance. It will mess with your blacks but not very much if you keep the opacity <50%. It's a tradeoff but it can help.
Click to expand...
Click to collapse
Actually that's what I've been using, it makes the black looks like dark blue...
The screen just isn't that good, not sure why so many people jump on the amoled bandwagon
LCD is more color accurate, no risk of burn in, the white looks so much better and the quality of LCD is always consistent unlike amoled which varies everytime.

linkzex said:
Actually that's what I've been using, it makes the black looks like dark blue...
The screen just isn't that good, not sure why so many people jump on the amoled bandwagon
LCD is more color accurate, no risk of burn in, the white looks so much better and the quality of LCD is always consistent unlike amoled which varies everytime.
Click to expand...
Click to collapse
I completely agree with you on every point. I'm an LCD person too for the same reasons.
Though I have to say I'm happy overall with this screen because of one reason, it's the most uniform screen I've ever had including all LCD phones I've had and they are a lot. My screen is pretty much perfect i never get this lucky certainly not with Amoled.
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"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Sent from my LG-H960 using Tapatalk

The sync issue is fixed and I don't have any problems with the screen. For many years everybody was loving the oversaturated amoled Samsung screens, but now there are opinions that some prefer lcd. Well it's a personal preference, lcd screens have bad black color and also drain more battery regardless what you're doing on your phone.

Colors/Screen quality ?

Hi,
After a week using my new Mi Max 3, I noticed that the screen colors are not as good as my good old Redmi Note 3 Pro.
Can it be a software issue or is it just the quality of the screen ? (my Mi Max 3 run on official Miui 10 Global Stable and my RN3P runs Xiaomi.eu Miui 10 dev rom).
{
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"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
As you can see, the colors and shadows of the exact same picture displayed on both phones are looking waaaay better on RN3P.
I was on the same screen settings (max brightness and high contrast), my RN3P also seems to be a bit more brighter (even though you probably can't see it on the pic) and my Mi Max 3 has a yellow tint that bugs me.
Could this be because of the software ? Xiaomi.eu on my Mi max 3 could help to solve this or not ?
Thanks for your help and do not hesitate to share about colors and screen quality of your Mi Max 3.

same result comparing my mi max 2 and max 3
max 2 screen colors are way better and more saturated

Saturated does not mean better. I use standard contrast for the best accuracy; mi max 3 is actually one of the top phones when it comes with accuracy out of the box in this mode. gsmarena reviewed the screen https://www.gsmarena.com/xiaomi_mi_max_3-review-1809p3.php
Increased contrast mode does remove some of the cold blue tint, bringing the average deltaE down to 4.4 and a maximum of 9. Pretty good, but we can probably do better, with some fiddling with the manual white point controls, Xiaomi so graciously provides. Luckily, before we started messing with those, we gave the "Standard contrast" mode a try and it left us truly amazed. An average deltaE of 1 and a maximum of 2.1. Those are values even most flagships struggle with. Especially out of the box. Xiaomi deserves plenty of praise in the color accuracy category.
Click to expand...
Click to collapse

So the standard mode is supposed to be better ?
Why do my screen looks even more yellowish on standard if the high contrast mode remove some blue light ?
Can someone show me some pics of their screen (with white menu background to compare) ? I'm starting to think that my screen has an issue

Kumikiri said:
So the standard mode is supposed to be better ?
Why do my screen looks even more yellowish on standard if the high contrast mode remove some blue light ?
Can someone show me some pics of their screen (with white menu background to compare) ? I'm starting to think that my screen has an issue
Click to expand...
Click to collapse
Leave it to automatic contrast - don't mess with that. Then go to Additional settings/Developer Options/Picture Color Mode/Use srgb - turn on. This is the best setting because in daylight it pumps up saturation to help you see in difficult sunlight while maintaining srgb color the rest of the time. Try it.

opasha said:
Leave it to automatic contrast - don't mess with that. Then go to Additional settings/Developer Options/Picture Color Mode/Use srgb - turn on. This is the best setting because in daylight it pumps up saturation to help you see in difficult sunlight while maintaining srgb color the rest of the time. Try it.
Click to expand...
Click to collapse
Thank you ! I thought you were refering to standard mode and not automatic.
However, in developper options I don't have the picture color mode line

Kumikiri said:
Thank you ! I thought you were refering to standard mode and not automatic.
However, in developper options I don't have the picture color mode line
Click to expand...
Click to collapse
Maybe it's a xiaomi.eu option. I'm on 8.8.9 xiaomi.eu. Maybe try flashing the latest xiaomi.eu if you're already on ARB.

Question Screen battery consumption

I'm running the Xiaomi.eu rom on my Poco F5, and have noticed that the display is consuming quite a large chunk of my battery life on each charge. Please see the screenshot below. It corresponds to roughly 2.4 mAh per minute of screen on time.
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"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
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"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
I just wanted to ask if this is to be expected or is out of the normal. This is quite new for me since I never saw such large battery consumption from the display on my last phone, which was a Xiaomi Mi 5s.
For your information, I'm using dark mode, static wallpaper, 60 Hz refresh rate, auto brightness enabled, and screen set to sleep after 30 s of inactivity.

Displays typically can use a lot of battery especially with high brightness levels.
Switch brightness control to manual and use at 20-40% brightness. Avoid using in direct sunlight as it's not good for it anyway.
Play with the refresh rate options.
Since it's a AMOLED display every pixel that's black or a darker color means less current used.
Use dark mode, and use minimalist icons.

@blackhawk - Thanks for your suggestions! For what it's worth, I fixed the brightness at about 30% for an entire day, and the screen battery consumption hasn't really changed much. It's still hovering around 2.4 mAh per minute of screen on time. The screen refresh rate is set to 60 Hz; the lowest it can be set at.

ragnaroknroll said:
@blackhawk - Thanks for your suggestions! For what it's worth, I fixed the brightness at about 30% for an entire day, and the screen battery consumption hasn't really changed much. It's still hovering around 2.4 mAh per minute of screen on time. The screen refresh rate is set to 60 Hz; the lowest it can be set at.
Click to expand...
Click to collapse
My display on my N10+ is set around 30% and it's consuming 28% of the total battery consumption. It's hard for me to calculate it's actual mAh usage unless I charge to 100% which I almost never do.
Regardless other than changing the brightness manually and in your case playing with the refresh rate settings there's not much else you can do other than optimizing the display content.
This is my homepage setup.

Thanks for sending over these screenshots! Your 28% screen battery consumption is almost exactly the same as mine, which likely indicates nothing untoward is going on in my phone. That comes as quite a relief.
PS: Am loving the minimalism of your home screen.

ragnaroknroll said:
Thanks for sending over these screenshots! Your 28% screen battery consumption is almost exactly the same as mine, which likely indicates nothing untoward is going on in my phone. That comes as quite a relief.
PS: Am loving the minimalism of your home screen.
Click to expand...
Click to collapse
You're welcome.
For a variable refresh rate display that's as much as you could hope for. For what it's doing that's not a bad number at all.
That's a stock N10+ and most of those mods are Samsung including the icon pack with the exception of Digi Clock and Energy Ring. Too bad Samsung is so screwed up now... so I keep running these.

I don't have the screen on time on my Poco F5, guess on Xiaomi.eu they brought it back..

blackhawk said:
You're welcome.
For a variable refresh rate display that's as much as you could hope for. For what it's doing that's not a bad number at all.
That's a stock N10+ and most of those mods are Samsung including the icon pack with the exception of Digi Clock and Energy Ring. Too bad Samsung is so screwed up now... so I keep running these.
Click to expand...
Click to collapse
Don't know too much about Samsung phones. Why do you say they are screwed up?

ragnaroknroll said:
Don't know too much about Samsung phones. Why do you say they are screwed up?
Click to expand...
Click to collapse
No expandable storage now in their flagships. The S23U is thicker, 30 gm heavier than the N10+ and the gets worst SOT... it's a long list.