(I posted early but a moderator removed because i put a video of what is pwm)
but well i searched all the internet and i cant find how bad the screen of this tab flicker because the pwm modulation, can someone that own the tablet film with a slow motion mode the screen changing the brightness low to maximum to know how much the screen flicker?
i wann buy this tablet because is really cheap in argentina i just wanna use it to read books an manga.
I don't know the values, but I am not recommending it for night reading with minimum brightness without any other light source. When I read in such conditions, my eyes are tired the next day, and sometimes after 2h of reading, they are in pain.
However, if you read during the day with some sunlight or a conventional bulb or non flickering LED light it is ok.
I have SM-T710.
Yes, they are cheap now so worth trying. When buying ask if the tablet restarts on a low battery percentage below 15%. If yes then you need to replace the battery but currently, it is hard to buy one. At least in Poland.
Related
IIRC, black uses little to no power on the SAMOLED display.
Knowing that the screen is the largest power hog, I'm curious if anyone could explain why switching to a mostly, or all black wallpaper (on an already black theme/ROM) does not have any appreciable effect on battery life/usage?
Black = Absence of color
In an ideal scenario, the system should not be rendering those pixels and so save power.
I do understand people saying most of the time they use a black wallpaper. But, practically, how many people are on their home screen and for how long? Most of the time we are all using one app or the other. There may be widgets, etc at home screen, but don't think we spend that long staring at it. Personally I don't think I spend even 5-10% of my display time on home screen. So even if I had a black wallpaper, its hardly any battery saver.
1 hour screen on takes ~20% of my battery. So 3 hours of display ~60% of battery. Assuming 10% of this time I am on home screen with black background. That would less than 6% of my battery.
Further take off the power used for displaying home screen elements, widgets, etc, etc at say 50%. This would bring it down further to 3%. Is it worth saving this 3% battery when we could some nice pleasing wallpaper?
Reducing display brightness tends to help though since lowered brightness means lowered power needed to power up the screen.
All this is based on my understanding of the system.
Edit: U cud try applying dark color schemes to apps that support them, like say k9 mail, root explorer etc. This cud help while u r in that app.
I put quote tags around the word color for specific emphasis on black not being a color lol
I use Serendipity 5.12 w/REDROM- almost everything is already black. I decided recently to see if adding a black wallpaper would help the craptastic battery life- since fidgeting w/kernels and modems did nothing noticeable to help (some combos made it worse, yeah).
Again the post is just out of pure curiosity.
diablo009 said:
Black = Absence of color
1 hour screen on takes ~20% of my battery. So 3 hours of display ~60% of battery.
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I noticed the same power consumption also on my Samsung Galaxy S2 (GT-I9100), and I find it really unbearable, since it means that there is absolutely no way I can get more than 4 hours of continuous use without running the battery flat.
Displays, no matter what, should not drain so much power!
Looking so pretty comes at a price, it would seem.
To an artist with a clean canvas, black is a color and white is not. To a photographer, the opposite is true. It all depends on who you ask.
So over the course of time I have used many different ROMs and also have had 5 batteries for my Note so far.
All ROMs gave me terrible battery life, except the stock android for around the first year, eventually it started giving me terrible battery life too.
So that got me wondering, is it possible that some kind of faulty hardware on my Note's motherboard is causing those battery drains?
[email protected] said:
So over the course of time I have used many different ROMs and also have had 5 batteries for my Note so far.
All ROMs gave me terrible battery life, except the stock android for around the first year, eventually it started giving me terrible battery life too.
So that got me wondering, is it possible that some kind of faulty hardware on my Note's motherboard is causing those battery drains?
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Click to collapse
I'm pretty sure that would be possible, but I'd make sure to rule out any other cause you can rule out first.
First thing to do is check on who or what is consuming the battery, so installing something like CPU Spy will let you know if the phone just keeps running at top speeds.
Because there simply isn't enough juice in these batteries to allow all parts of the phone to run full throttle for hours.
Smart phones are really at their best, when their just sitting idle and then they really shouldn't consume any power. That's what you need to check: Does it really slow down and sleep, when you're not actively using it?
And CPU Spy (or similar tools) will give you that info by telling you how much time the CPU has spent at each speed setting. If it doesn't drop to deep sleep when the phone if off the charger, screen switched off at the home screen but stays running at 100-500MHz, then you have found the reason for the miserable battery life. Now you'd just have to find what's causing it.
And that could be a long story journey...
However you could start with an empty ROM fully wiped, nothing but the ROM and the minimum set of GAPPS installed (and CPU Spy or similar for checking) empty internal SDcard, expecially no media files. If you have an external SD card, best remove that initially so you don't have to delete any data you keep on there.
If then the Note isn't guzzling battery and sleeping deeply when not used, your hardware is fine.
Then it's just a matter of adding item after item, always checking of that is causing any change to CPU states and energy consumption.
You should also try to find out of any of your five batteries has issues and use a known good one for the testing.
abufrejoval said:
I'm pretty sure that would be possible, but I'd make sure to rule out any other cause you can rule out first.
First thing to do is check on who or what is consuming the battery, so installing something like CPU Spy will let you know if the phone just keeps running at top speeds.
Because there simply isn't enough juice in these batteries to allow all parts of the phone to run full throttle for hours.
Smart phones are really at their best, when their just sitting idle and then they really shouldn't consume any power. That's what you need to check: Does it really slow down and sleep, when you're not actively using it?
And CPU Spy (or similar tools) will give you that info by telling you how much time the CPU has spent at each speed setting. If it doesn't drop to deep sleep when the phone if off the charger, screen switched off at the home screen but stays running at 100-500MHz, then you have found the reason for the miserable battery life. Now you'd just have to find what's causing it.
And that could be a long story journey...
However you could start with an empty ROM fully wiped, nothing but the ROM and the minimum set of GAPPS installed (and CPU Spy or similar for checking) empty internal SDcard, expecially no media files. If you have an external SD card, best remove that initially so you don't have to delete any data you keep on there.
If then the Note isn't guzzling battery and sleeping deeply when not used, your hardware is fine.
Then it's just a matter of adding item after item, always checking of that is causing any change to CPU states and energy consumption.
You should also try to find out of any of your five batteries has issues and use a known good one for the testing.
Click to expand...
Click to collapse
Okay to begin, the phone never drains battery when idle, never. If I charge to 100% at night around 23:00 , in the morning it would be around 90%. So that seems fair enough. Because I keep my EDGE / 2G activated at all times.
The real problem is when the screen is turned on (doesn't matter what I do).
I tried to keep the screen on for one hour, idle, doing nothing. Battery drained by a whooping 25%. So basically it's my screen which is consuming my battery. I didn't try this when I made this thread, so there's no mention of this in the first post.
So I don't think any other apps are consuming anything. Besides I hardly have any apps installed.
I got the gapps from the following link and installed the 'mini' package.
http://forum.xda-developers.com/par...apps-official-to-date-pa-google-apps-t2943900
Apart from I only have WhatsApp, Notepad, Perfect AppLock, AdAway and Chrome installed. Only a few apps since I did a full wipe yesterday night. Even flashed a stock ROM first and began from scratch.
So I don't really think it's any apps consuming any CPU, only screen is eating a ****load. Could it be the damaged screen?
Holy ****! I just recalled while writing this post, I did get this screen of this phone replace once, like one and half year ago. Could that be it? I did get it replaced from a official Samsung store though.
[email protected] said:
Okay to begin, the phone never drains battery when idle, never. If I charge to 100% at night around 23:00 , in the morning it would be around 90%. So that seems fair enough. Because I keep my EDGE / 2G activated at all times.
The real problem is when the screen is turned on (doesn't matter what I do).
I tried to keep the screen on for one hour, idle, doing nothing. Battery drained by a whooping 25%. So basically it's my screen which is consuming my battery. I didn't try this when I made this thread, so there's no mention of this in the first post.
So I don't think any other apps are consuming anything. Besides I hardly have any apps installed.
I got the gapps from the following link and installed the 'mini' package.
http://forum.xda-developers.com/par...apps-official-to-date-pa-google-apps-t2943900
Apart from I only have WhatsApp, Notepad, Perfect AppLock, AdAway and Chrome installed. Only a few apps since I did a full wipe yesterday night. Even flashed a stock ROM first and began from scratch.
So I don't really think it's any apps consuming any CPU, only screen is eating a ****load. Could it be the damaged screen?
Holy ****! I just recalled while writing this post, I did get this screen of this phone replace once, like one and half year ago. Could that be it? I did get it replaced from a official Samsung store though.
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Click to collapse
I'd consider playing with the brightness, just to see of something a little lower is good enough for daily use but I'd say that isn't impossible...
While Samsung liked to hype the fact that OLED would only use power on illuminated pixels, mine are mostly white because reading is what I do most on my Notes.
And then this screen on the Note 1 didn't use particularly less energy than a good LCD backlight screen according to the reviews I remember.
I also remember an article which said that the energy consumption on OLED wasn't linear and that the last 20% of brightness might cost 50% more power (the numbers are most likely bogus but the main point was that brightness/energy consumption wasn't linear).
And yes, there is most likely variation between individual screens on OLED and moreover OLED displays decay with use and over time. I haven't noticed it that much with my Note 1 yet, but my older Samsung Galaxy S I-9000 that I passed on to one of my sons developed a brightness issue: Everything below the first 100 lines or so is significantly darker than the top. I don't know wether that's a consequence of his usage pattern (Whatsapp) or some other reason, but I do know that he typically kept the display at top brightness and also kept it lit far longer than I ever did.
I've always been somewhat disappointed by the endurance of the Note 1 but I haven't really noticed any significant change with the different ROM versions. And since I was also somewhat disappointed by the performance of the device I couldn't resist replacing it with the Note 3 when that came out.
That device was better in pretty much every regard, except screen ratio: I really, really liked the 16:10 of the Note 1 a lot better than the 16:9 of the Note 3.
abufrejoval said:
I'd consider playing with the brightness, just to see of something a little lower is good enough for daily use but I'd say that isn't impossible...
While Samsung liked to hype the fact that OLED would only use power on illuminated pixels, mine are mostly white because reading is what I do most on my Notes.
And then this screen on the Note 1 didn't use particularly less energy than a good LCD backlight screen according to the reviews I remember.
I also remember an article which said that the energy consumption on OLED wasn't linear and that the last 20% of brightness might cost 50% more power (the numbers are most likely bogus but the main point was that brightness/energy consumption wasn't linear).
And yes, there is most likely variation between individual screens on OLED and moreover OLED displays decay with use and over time. I haven't noticed it that much with my Note 1 yet, but my older Samsung Galaxy S I-9000 that I passed on to one of my sons developed a brightness issue: Everything below the first 100 lines or so is significantly darker than the top. I don't know wether that's a consequence of his usage pattern (Whatsapp) or some other reason, but I do know that he typically kept the display at top brightness and also kept it lit far longer than I ever did.
I've always been somewhat disappointed by the endurance of the Note 1 but I haven't really noticed any significant change with the different ROM versions. And since I was also somewhat disappointed by the performance of the device I couldn't resist replacing it with the Note 3 when that came out.
That device was better in pretty much every regard, except screen ratio: I really, really liked the 16:10 of the Note 1 a lot better than the 16:9 of the Note 3.
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I see. Thank you for the time you took to write this reply.
I always have my brightness to the lowest possible and yet I am facing battery drains.
Anyways, it seems this problem is beyond repair. I have literally tried every solution possible and nothing seems to have worked. So I guess it's time to move on.
Thank you for your time and information.
It's probably my screen that's consuming the battery. It can easily last up to 20 hours with 2G turned on the entire day. But as soon as I turn the screen on and start doing something, battery drains at like 1% every 60 seconds.
How old is your battery?.. I´d say get a new one if it´s older than 1 year..
Hi somebody knows how to fix burn in on note 8 i have it in the middle of the screen anyone?
I think you need to replace the whole screen. Curious to how long have you had your note8? I've had mine since launch and my screen is still burn free, though I rarely go beyond 75% brightness.
There is no fix for burned screens, but there some precautions to prevent it, resonable brightness level is a very important one
NIKKOTUASON said:
I think you need to replace the whole screen. Curious to how long have you had your note8? I've had mine since launch and my screen is still burn free, though I rarely go beyond 75% brightness.
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I've had it since launch too
I am surprised some of you are running the screen at 75% brightness. Mine is usually set to 50-60% at all times and it is more than bright enough. This is for general indoor use/night time that is...
In fact, my other phone, the Huawei Mate 10 Pro is set to 70% brightness yet is about as bright as my Note 8 at 50% brightness. Fantastic and very bright screen the Note 8 already has...
kanej2006 said:
I am surprised some of you are running the screen at 75% brightness. Mine is usually set to 50-60% at all times and it is more than bright enough. This is for general indoor use/night time that is...
In fact, my other phone, the Huawei Mate 10 Pro is set to 70% brightness yet is about as bright as my Note 8 at 50% brightness. Fantastic and very bright screen the Note 8 already has...
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Click to collapse
Where do you derive the brightness percentage figures from?
Sent from my SM-N950U using Tapatalk
kanej2006 said:
I am surprised some of you are running the screen at 75% brightness. Mine is usually set to 50-60% at all times and it is more than bright enough. This is for general indoor use/night time that is...
In fact, my other phone, the Huawei Mate 10 Pro is set to 70% brightness yet is about as bright as my Note 8 at 50% brightness. Fantastic and very bright screen the Note 8 already has...
Click to expand...
Click to collapse
As burn in would totally do my head in, I've got mine set to around 35-40% and I think that's plenty bright enough. Obviously, if it detects I'm in bright sunlight it gets brighter of its own accord, so the relatively low brightness works well for me, plus it saves a bit of battery too.
I got burn in just the status bar,but without clock and battery and other items,just the bar itself,i use the phone for about six mounths,and i stay over 75% everyday,i work outside ..and only that bar got burn,you need to be careful cuz the note 8 is a beautiful pice.
I just got a replacement for my Note 8 after having terrible burn in using the navigation app. on my motorcycle. I always had my brightness set to auto, but had the nav app display always on. I actually have bad burn in from both the copilot app as well as the Waze app. With the replacement, I will set the app to turn the display off after a few minutes. Kind of sucks, as I used my Note 3 for 3 years and never had this issue. I wonder if reducing the screen resolution would help? I always had it at the highest setting.
Lowering the resolution will in fact make it worse, as it groups pixels to behave as one, better do what you said, lower brightness, shorter times to screen off, etc
Motowojo said:
I just got a replacement for my Note 8 after having terrible burn in using the navigation app. on my motorcycle. I always had my brightness set to auto, but had the nav app display always on. I actually have bad burn in from both the copilot app as well as the Waze app. With the replacement, I will set the app to turn the display off after a few minutes. Kind of sucks, as I used my Note 3 for 3 years and never had this issue. I wonder if reducing the screen resolution would help? I always had it at the highest setting.
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Click to collapse
I had a similar burn-in issue using Android Auto on my Note 4, so for my Note 8 I use Tasker to dim the screen to around 10% which is just about visible - I can restore normal brightness by using the proximity sensor to toggle it on and off.
Hello! So, I installed Android 10 and now when i wireless charge my 10+ I always have always on display on the bottom of the screen (% and estimated waiting time to 100%). How do i turn it off? Even if the light is low, I really dont want it to be always displayed during charge (and maybe it could also cause burn in problems, altho i read always on display text isnt always using same pixels, so who knows).
Thanks!
I wouldn't worry about burn in. I use my phone a lot for youtube and waze and both caused serious burn in on my note 8 (max brightness usually), but on my s10 there is zero burn since release with the same usage.
You can however disable it. It's under Display and the option is called Show charging information
I have the S10 Exynos version unlocked, since new I noticed a dead pixel, whatever not big deal, never took it to warranty, but a few months ago I dropped my phone with case and everything so the frame wasn´t affected but the screen... the glass didn´t broke but the screen did... Appeared some white lines near the edges, some horizontal and one vertical, and the phone now sometimes the screen turns on, sometimes I have to lock and unlock it several times with the button to get the screen to turn on, green tint or flickering on high brightness, etc... Expected problems on a phone with broken oled screen.
My question here is: Does a broken OLED screen waste more energy?
Since the broken screen incident, my phone heats up more quickly when in use, I run out off battery juice in like 4 hours of normal use, and I know the white lines may consume more energy as they are also on max brightness even when I have my brightness set to 1/4, but that much energy? The lines arent even that big, just in the lower and left edges of the screen.
No settings where changed asside from using the windows phone app sometimes, no new apps, adaptive brightness off and almost always on 1/4 intensity, dark mode enabled, screen resolution set to HD+, battery mode on optimized and adaptive energy saving on, no virus according to mcafee built in, and really no changes aside for the broken screen.
Also any ideas for making my battery last at least half day? Appart from changing the screen and doing a hard reset (I can´t afford the screen repair right now as it is 200 dollars in my country) and the hard reset has already been done a month ago with same results