Related
I just came across to this forum thread:
http://androidforums.com/htc-desire/59486-amoled-black-wallpaper-battery-saved.html
This was also my question some times ago when I start checking HTC Desire.
Anyone can do this kind of experiment? Because if this true and have significant impact on battery level, it could be a really good way to get more juices. We know that HTC Desire battery live is not that amazing.
Benchmarking could be very simple like this:
Code:
1. Use bright wallpaper with a lot of white color and [B][COLOR="Blue"]set the brightness at maximum[/COLOR][/B]
2. [B][COLOR="Blue"]Set your phone to NOT turn-off screen automatically[/COLOR][/B]
3. Write down your battery level at start
4. Leave it turned-on for 1 hour or more and do nothing
5. Compare the battery level
You should get the battery level differences.
Then do it again with complete black background.
Or better, you can do this overnight. Just write down the start-time and battery level of the experiment and compare at the end.
We should be able to calculate the battery drain per minute!
PS: I will do this, but I have not received my HTC Desire yet
the following quote is from wikipedia
Power consumption
While an OLED will consume around 40% of the power of an LCD displaying an image which is primarily black, for the majority of images, it will consume 60–80% of the power of an LCD - however it can use over three times as much power to display an image with a white background[53] such as a document or website. This can lead to disappointing real-world battery life in mobile devices.
Click to expand...
Click to collapse
and check the following chart (not from wikipeda, from other website)
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And this is the complete presentation from Irkan post:
http://data.4dsystems.com.au/downloads/micro-OLED/Docs/4D_AMOLED_Presentation.pdf
See on page 17 for example (image attached).
I am really sure that using black background will have quite significant different on battery life. Note that this is the main reason on Microsoft Windows Phone 7, to use mainly black background.
Now, can anyone who already own HTC Desire do the "real-world" test that I suggested above?
We need to know how this power saving translated to more hour/minute battery power
since i got my phone i been using the carbon/black background but because its been only about 2 charges my battery hopefully isnt at its best yet but each time after a battery i will change the background for basic testing
cez10 said:
since i got my phone i been using the carbon/black background but because its been only about 2 charges my battery hopefully isnt at its best yet but each time after a battery i will change the background for basic testing
Click to expand...
Click to collapse
Your battery won't get better after more charges. It's at its best now and only degrade from now on. It's the chemistry of a lithium battery
Why would a black background give battery results over night when the screen is not being used, that's nonsense.
A black background only helps you a bit. Once you run an app or start browsing the effect is mostly gone.
It will help in some way for sure, especially when you use the home screen a lot. But it won't be earth shattering...
Still, the amoled screen should save power in most other situations as well when you look at the pic posted earlier.
RaptorRVL said:
Your battery won't get better after more charges. It's at its best now and only degrade from now on. It's the chemistry of a lithium battery
Why would a black background give battery results over night when the screen is not being used, that's nonsense.
A black background only helps you a bit. Once you run an app or start browsing the effect is mostly gone.
It will help in some way for sure, especially when you use the home screen a lot. But it won't be earth shattering...
Still, the amoled screen should save power in most other situations as well when you look at the pic posted earlier.
Click to expand...
Click to collapse
does the battery require calibration(fully discharge) when you receive the phone?
I think HTC should immediately, AT LEAST give an option, to view all their Sense application in reverse colors (black background). If you note,
-People
-Messages
-Mail
-Calendar
-Photos...
-Adding to it the Android Market
They ALL use white backgrounds! And these are the applications mostly used.
It doesn't make sense they missed that.
All in all ... I still can't see the sense behind using AMOLED. It's really disappointing.
cez10 said:
does the battery require calibration(fully discharge) when you receive the phone?
Click to expand...
Click to collapse
Well, that could be yes. But that depends really. That would be the only reason why the battery might 'improve'. But, I would assume that the phone will only shut down when the battery reaches a certain voltage. Until that point the percentage just falls down fast, but stays about the same in the lower percentages.
So, it could be useful to fully charge the first time and then wait/use until the phone shuts down. Then fully charge and hope the device has a nice average to show reliable percentages
salahag said:
I think HTC should immediately, AT LEAST give an option, to view all their Sense application in reverse colors (black background). If you note,
-People
-Messages
-Mail
-Calendar
-Photos...
-Adding to it the Android Market
They ALL use white backgrounds! And these are the applications mostly used.
It doesn't make sense they missed that.
All in all ... I still can't see the sense behind using AMOLED. It's really disappointing.
Click to expand...
Click to collapse
Because on average the amoled will be much more efficient. And there are more things that influence battery life.
Besides that, most people like white backgrounds much more than black ones
Grey might be a nice option. I wonder it going to 80% from white will also save around 20% of power.
RaptorRVL said:
Well, that could be yes. But that depends really. That would be the only reason why the battery might 'improve'. But, I would assume that the phone will only shut down when the battery reaches a certain voltage. Until that point the percentage just falls down fast, but stays about the same in the lower percentages.
So, it could be useful to fully charge the first time and then wait/use until the phone shuts down. Then fully charge and hope the device has a nice average to show reliable percentages
Click to expand...
Click to collapse
ok well so far i charged it with the phone off just after i received it for about 1.30h then bout 8h later I started charging while using it for a bit and then switched it off to continue charging 'overnight'. started using it heavily at 8 this morning (mainly wifi) and now its 4 and its on 37% so reckon will easily die before midnight so then can calibrate it over night
RaptorRVL said:
Because on average the amoled will be much more efficient. And there are more things that influence battery life.
Besides that, most people like white backgrounds much more than black ones
Grey might be a nice option. I wonder it going to 80% from white will also save around 20% of power.
Click to expand...
Click to collapse
I agree, it's a combination of things that we should optimize for best power durability. Yes I think gray is nice and should make a difference in power
But I disagree that it's more efficient on average, most applications have a white background, most websites have a white background, even if you use a dark wallpaper, it won't be there most of your time using the phone.
Also photos must have a relatively large black portion to use less power than LCDs.
I like the desire and was waiting for it for some time now, just disappointed. I'll wait for someone to make that background test and decide if I will buy it or probably buy it
salahag said:
I agree, it's a combination of things that we should optimize for best power durability. Yes I think gray is nice and should make a difference in power
But I disagree that it's more efficient on average, most applications have a white background, most websites have a white background, even if you use a dark wallpaper, it won't be there most of your time using the phone.
Also photos must have a relatively large black portion to use less power than LCDs.
I like the desire and was waiting for it for some time now, just disappointed. I'll wait for someone to make that background test and decide if I will buy it or probably buy it
Click to expand...
Click to collapse
I think you are making too much out of it.
Try to look at it from a different angle, all the text in those screens (usually black) save you energy! So the more text you get, the less energy it costs! A normal lcd always uses the same amount of energy.
Perhaps someone should measure the amount of 'black' being used in a text only e-mail (within the screen). And then you get a nice estimate of how much power the screen will actually use. Maybe I will do it when I find some time for it
In most cases (any other case than full white background) the AMOLED is better than TFT (more colorful, saves more power, ... etc).
so if the "white background power consumption" is an excuse for you to not get an AMOLED, than think again
irkan said:
In most cases (any other case than full white background) the AMOLED is better than TFT (more colorful, saves more power, ... etc).
Click to expand...
Click to collapse
I'm really not convinced that the Desire's AMOLED is better than TFT in any way. This is why not:
1) The longevity of these displays is questionable. From wikipedia: "AMOLED displays are prone to material degradation. However technology has been invented to circumvent this problem. Whether these mechanisms have been implemented in current applications of AMOLED displays is unknown, as are potential effects on power consumption."
2) Less accurate colour reproduction due to pixels being RRGBBG rather than the RGBRGB pattern on normal screens. The AMOLED RRGBBG pattern is used to try to avoid material degradation.
3) The Desire's 800*480 AMOLED screen does not have the same sharpness/resolution as a TFT 800*480 screen since any one pixel can not display the full range of colours (see 2). This is particularly noticeable with white text since it takes two pixels to display a white colour instead of one on a normal screen.
4) Power consumption in practice is not any better. This is proved by the fact that the HD2 has 35% more screen area powered by a 12% smaller battery, yet the battery life is at least comparable if not better.
5) Do you really want a display that makes you think twice about showing anything that's white because it'll drain the battery 3 times as fast? It would be like living in a house where you're scared to turn the lights on! Fine if you're a Goth and live in a dark world I suppose.
6) AMOLED is supposedly "more colourful" than TFT. I would suggest that "more colourful" = "less true to life". My HD2 colours are very accurate and I wouldn't want them any more colourful. Similarly I could turn the colour up on my TV to make it "more colourful" but I don't because it doesn't look right.
I love these "My thingy is better than you're thingy" debates - they can go on for ever without anyone changing their own opinion! Now if only I could get Android 2.1 with HTC Sense on my HD2...
Moandal said:
I'm really not convinced that the Desire's AMOLED is better than TFT in any way. This is why not:
1) The longevity of these displays is questionable. From wikipedia: "AMOLED displays are prone to material degradation. However technology has been invented to circumvent this problem. Whether these mechanisms have been implemented in current applications of AMOLED displays is unknown, as are potential effects on power consumption."
2) Less accurate colour reproduction due to pixels being RRGBBG rather than the RGBRGB pattern on normal screens. The AMOLED RRGBBG pattern is used to try to avoid material degradation.
3) The Desire's 800*480 AMOLED screen does not have the same sharpness/resolution as a TFT 800*480 screen since any one pixel can not display the full range of colours (see 2). This is particularly noticeable with white text since it takes two pixels to display a white colour instead of one on a normal screen.
4) Power consumption in practice is not any better. This is proved by the fact that the HD2 has 35% more screen area powered by a 12% smaller battery, yet the battery life is at least comparable if not better.
5) Do you really want a display that makes you think twice about showing anything that's white because it'll drain the battery 3 times as fast? It would be like living in a house where you're scared to turn the lights on! Fine if you're a Goth and live in a dark world I suppose.
6) AMOLED is supposedly "more colourful" than TFT. I would suggest that "more colourful" = "less true to life". My HD2 colours are very accurate and I wouldn't want them any more colourful. Similarly I could turn the colour up on my TV to make it "more colourful" but I don't because it doesn't look right.
I love these "My thingy is better than you're thingy" debates - they can go on for ever without anyone changing their own opinion! Now if only I could get Android 2.1 with HTC Sense on my HD2...
Click to expand...
Click to collapse
you only see the empty half of the cup, and even the other full half that really exists, you deny it.
if you are not convinced that that is your personal opinion, but you have to into consideration the studies that has been shown how AMOLED is more suitable than TFT in some applications (including mobile)
Since you copied wikipedia, i will copy from it and other places
advantages of AMOLED:
1. Thin and light-weight (this allow the mobile phone to be thiner and more compact, and more "MOBILE").
2. Lower power consumption (in almost all the cases but white). this is an advantage not a disadvantage. noone is forcing you to not use white bg, but if you dont use it you will save MORE than usual power, either ways IMO the battery life consumption is better than TFT (even if you used white occasionally, and normally). I highly doubt that anyone would use full pure white screens all the times.
3. better viewing angle, not a biggie, but its better than TFT viewing angle so its an advantage.
4. High color contrast ratio (Black is Black) and the other colors look better and sharper, that is the real "true to life" color, not like TFT where black and other colors are "washed out" (washed out is not true to life btw )
5. High Ambient Contrast Ratio, in fact AMOLED are suppose to look better in ALL conditions including under sun-light, however that feature has been crippled somehow by the manufacturers cuz they added a reflective layer on top of it (to better protect the screen i suppose, not sure). its still +1 for AMOLED in general.
6. Fast response time, the LEDs response faster and better to moving pictures , yes faster than the response time or TFT, AMOLED response <50uS, TFT response 3000~30000uS, so if you wanna see a movie and there is someone very speedy is racing, you will see it blurry in the TFT (and this is different than, CPU power. this is the response time of the display).
7. wide temperature operation, AMOLED can work from
-40 ~85C while TFT from -20 ~70C (I doubt that this will be useful, but hey its an advantage over TFT)
8. Significantly higher Colour Gamut, AMOLED looks brighter, sharper and more visually pleasing when tested under constant color gamut using gray levels
overall, nothing is perfect, .. but its advantages, outweighs its disadvantages
Of course using mostly black colors will not give you over night more battery life. I know that.
But at least it should give you "additional" juices compare to white or bright one.
How much additional? I don't know yet. That's why if someone could test it.
And yeah, we all know that not only the screen will influence battery life But, in this test is about to measure the screen ... so, if you want to test it, turn off all other services like WiFi/GPS/Data.
Or do you think this is silly test? Well, this just for fun and to test the theory
You know, even if it give additional 5% (from 10 hours battery life to 10 and 30 minutes, I would be happy!).
RaptorRVL said:
Your battery won't get better after more charges. It's at its best now and only degrade from now on. It's the chemistry of a lithium battery
Why would a black background give battery results over night when the screen is not being used, that's nonsense.
A black background only helps you a bit. Once you run an app or start browsing the effect is mostly gone.
It will help in some way for sure, especially when you use the home screen a lot. But it won't be earth shattering...
Still, the amoled screen should save power in most other situations as well when you look at the pic posted earlier.
Click to expand...
Click to collapse
irkan said:
you only see the empty half of the cup, and even the other full half that really exists, you deny it.
if you are not convinced that that is your personal opinion, but you have to into consideration the studies that has been shown how AMOLED is more suitable than TFT in some applications (including mobile)
Since you copied wikipedia, i will copy from it and other places
advantages of AMOLED:
1. Thin and light-weight (this allow the mobile phone to be thiner and more compact, and more "MOBILE").
2. Lower power consumption (in almost all the cases but white). this is an advantage not a disadvantage. noone is forcing you to not use white bg, but if you dont use it you will save MORE than usual power, either ways IMO the battery life consumption is better than TFT (even if you used white occasionally, and normally). I highly doubt that anyone would use full pure white screens all the times.
3. better viewing angle, not a biggie, but its better than TFT viewing angle so its an advantage.
4. High color contrast ratio (Black is Black) and the other colors look better and sharper, that is the real "true to life" color, not like TFT where black and other colors are "washed out" (washed out is not true to life btw )
5. High Ambient Contrast Ratio, in fact AMOLED are suppose to look better in ALL conditions including under sun-light, however that feature has been crippled somehow by the manufacturers cuz they added a reflective layer on top of it (to better protect the screen i suppose, not sure). its still +1 for AMOLED in general.
6. Fast response time, the LEDs response faster and better to moving pictures , yes faster than the response time or TFT, AMOLED response <50uS, TFT response 3000~30000uS, so if you wanna see a movie and there is someone very speedy is racing, you will see it blurry in the TFT (and this is different than, CPU power. this is the response time of the display).
7. wide temperature operation, AMOLED can work from
-40 ~85C while TFT from -20 ~70C (I doubt that this will be useful, but hey its an advantage over TFT)
8. Significantly higher Colour Gamut, AMOLED looks brighter, sharper and more visually pleasing when tested under constant color gamut using gray levels
overall, nothing is perfect, .. but its advantages, outweighs its disadvantages
Click to expand...
Click to collapse
In response to your "advantages":
1) If AMOLED allows the phone to be thinner and more compact, how come the HD2 is thinner than the Desire?
2) You haven't explained how the HD2 can run a 35% bigger screen with a 12% smaller battery if it's screen requires more power in real-life usage.
3) Fair enough.
4) You're talking about AMOLED displays in theory. I'm talking about the specific implementation on the Desire (and Nexus One). I don't have a Desire to compare side-by-side with the HD2. However Neowin.net do have an iPhone to compare it with, and it doesn't compare well. http://www.neowin.net/news/nexus-one039s-amoled-screen-only-uses-16-bit-color
5) "+1 for AMOLED in general" is irrelevant when we're talking about the Desire specificially. Both the Desire and the HD2 are poor, although given how poor the HD2 is, maybe the Desire does sneak a point on this one.
6) The image response on the HD2 is fast enough for any delay to be un-noticeable. Anything better than un-noticeable is still no better in practice. If you think it's noticeable on the HD2, give me a link to a review or article to back up your claims.
7) I stop operating below -20C and above +35C, never mind my phone, so this point is utterly irrelevant.
8) Same comment as 4) above.
You're grasping on to the theory of AMOLED displays in general. I'm talking about the Desire specifically and how it stands up in real life against other phones for important things like power usage and colour reproduction.
Moandal said:
In response to your "advantages":
1) If AMOLED allows the phone to be thinner and more compact, how come the HD2 is thinner than the Desire?
Click to expand...
Click to collapse
Come on, you came up with this kind of question?
The hardware is DIFFERENT, do you think ALL AMOLED devices should be this thin or that thin?
Moandal said:
2) You haven't explained how the HD2 can run a 35% bigger screen with a 12% smaller battery if it's screen requires more power in real-life usage.
Click to expand...
Click to collapse
Again, I don't think this would be an exact comparison. You simply cant, because the OS is different, the video driver is different, etc! Which one is more efficient? How do you measure real-life usage? The hardware is DIFFERENT.
You cant just factor the screen alone on this.
It would be meaningful if you come up with similar Android device that runs same level of OS but using LCD as the screen.
Moandal said:
You're grasping on to the theory of AMOLED displays in general. I'm talking about the Desire specifically and how it stands up in real life against other phones for important things like power usage and colour reproduction.
Click to expand...
Click to collapse
Please, don't bring this to a discussion about HD2 vs Desire!!!
This thread is intended to find out if "black background" could SAVE MORE BATTERY LIFE on HTC Desire.
*begging* ... please don't stir this discussion out of context.
gogol said:
This thread is intended to find out if "black background" could SAVE MORE BATTERY LIFE on HTC Desire.[/B]
Click to expand...
Click to collapse
It does
Sure, but as I said, how big is the additional battery life saving?
If it is not that significant, then forget it.
10% would be nice ... Imagine average 10 hours battery life , +10% = 11 hours
Damn! I need my HTC Desire NOW!!
irkan said:
It does
Click to expand...
Click to collapse
I have become satisfied with the battery life on my AMOLED inc, but the power button is screwed up so I am getting a new/refurbished one. I am not sure if it will be AMOLED or SLCD, but I am excited either way.
Does the SLCD get the same or better battery life? Is the only other difference between the two that some recoveries don't work with it...
I may be wrong but I've never heard any blaring differences between the two, yet this is with my experiences.
If there is any battery saving difference I haven't noticed any. I got one of the first SLCD units and the battery life is just as bad as before.
For some reason I have it in my head that amoled has better battery with dark colors and lcd with whites. I think I read it in regards to lcd and led tvs.
Sent from my Incredible using XDA App
As far as I know, AMOLED's are better when displaying black colors. Because the pixels don't light up thus saving power. But on the downside when displaying white (Such as a web page) it can use up to 3x more power. The SLCD on the other hand is more neutral. It uses the same power with all colors. Because the blacks light up, but the white doesn't use any more power than the others.
Correct me if I'm wrong. That's just what I've read somewhere along the line.
I think lcd's work by always displaying white then use power to block certain colors out.thus blocking every color, ie black, uses the most. At least that'd what I always thought.
Sent from my Incredible using XDA App
AMOLED on average has better battery life through most tests I've found, but the principles of what you're viewing has a large affect on it. I prefer dark backgrounds as it is, but if you're using a lighter background and have your screen unlocked often it's going to drain a bit more than it would if you had say, a black or dark gray background. The differences are really going to be minimal in everyday usage.
Does anyone else experience eyestrain with devices that have the HD Super Amoled screen?
I notice after about 10 - 15 mins of use, I get dizzy and my eyes hurt like they are being crossed or something when using the galaxy s3 or galaxy note, my old galaxy s2 skyrocket doesn't bother me though....
I've tried to turn the brightness down all the way, using the device at different distance to no avail.
Any possible solutions to remedy this? or am I going to have to sell my new S3 like I did my galaxy note? :/
depends on 2 very important factors...
1- how much cheese I've smoked
2- what was the question again?
Sent from My Omega powered beast, using Xparent ICS
I've actually noticed a decrease in eye strain coming from an LCD screen on my atrix. LCD screens are constantly flashing, and the screen on my galaxy s3 is super clear for me almost no eye strain. Its probably personal preference though.
Sent from my SAMSUNG-SGH-I747
jefferson9 said:
I've actually noticed a decrease in eye strain coming from an LCD screen on my atrix. LCD screens are constantly flashing, and the screen on my galaxy s3 is super clear for me almost no eye strain. Its probably personal preference though.
Sent from my SAMSUNG-SGH-I747
Click to expand...
Click to collapse
I've actually experienced the opposite as my first android device was an atrix....
I think it may have something to do with the 1200 x 800 resolution on such a small screen because If I turn up the resolution on my PC HD monitor to something like 1600 x 1200 for example, my eyes start to hurt.
I was actually going to post a new great until I saw this. I came from retina displays and my eyes are sore after I look at the screen for over 10 minutes on my GS3. Kinda concerning!! Might have to switch back to an apple product. I was getting use to droid too. :-/
its because of the screen size/pixels. Your eyes still needs to be adjusted to the new screen lol... obv
Yes!
I got vertigo/migraines about a month after getting my S3. I had a number of medical tests to see what was causing it - but even after new glasses I've narrowed it down to the S3 display being too strong for my eyes. I'm going to sell mine and get a replacement with a duller screen.
Try this...
Try changing the Screen Mode to 'Natural' or 'Movie". Helped a bit.
I also immidiately noticed eye fatique after getting Galaxy s3, particularly in my right eye. It started only getting worse, and coincidently only when I was using Galaxy. Other lcd devices such as older 3gs never bothered me at all. Surpisingly majority of reviews call the display stunning quality, but its pretty dim, practically unusable outside and colors are unnaturally oversaturated, all of which didnt bother me that much as long as my eyes wouldnt hurt so much. I started reading more about specs in Super amoled technology, but nothing pointed out to potensial issues, than I googled galaxy s3 refresh rate, and the first video from the search result comparing s3 to the iphone, provided a major clue. The poor quality camera was picking up horrible flickering from galaxy, but iphone screen didnt flicker at all. It instantly brought me back to old CRT days, and I also remember getting dizzy from such displays running at low refresh rates of 60mhz. Back than bumping up refresh rate to 75mhz conciderably dicreased eye strain. I took the video to the store, sales person was suprised that I was returning such popular product, but its been a day since my exchange for another brand and eye strain is gone. The issue maybe overlooked as it affects low percentage of people, but if you have sensitive vision, than you'd be much better off with non hd amoled technology
Could it be the brightness?
I'm sure your not holding it against your nose while watchin you tube, but maybe its the overall brightness of the screen thats getting to you? I use a powersaver app that has a black screen filter that dims it out a good little bit, maybe something like that could help, or a matte finish screen protector...the anti glare ones I think.
Use the "Screen Filter" for use at nights.
Set brightness to 0, and enable filter. I set mine at 48.6% and 36.9% (created two widgets with these percentages) and use either as needed.
Set your brightness lower. It's the brightness of your screen. I have the same problem before turning down the screen
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Keep phone at safe distance from face. Try a dark theme or inverted apps, or both they will most likely reduce eyestrain as well as save battery.
AT&T SGS3
ParanoidKangDroid 1.1.0 ROM
KT747 10/28 OC'ed & UV'ed
Medical MJ Supporter
Seems ok to me with brightness anywhere from dimmest to 50%.
hmm, can't say I've experienced any strain.
The cm10 rom is extremely bright too, at half, I started getting headaches but on stock, I can state at near brightest all day.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Hi all,
There are a lot of users who feel uncomfortable with AMOLED displays (not all of them, for example sgs2 is not affected). They can struggle with head ache and eye strain. You can google "galaxy s3 eye strain" for example or watch how AMOLED blinks through photo/video camera (there are tons of youtube videos). This effect apperars only when screen brightness is not at maximum level. The nature of that is the mechanism used for brightness control. Instead of forcing the pixels to glow at less brightness they force them to blink very fast. The faster pixel blinks - the brighter it seems to the user. The downside of this is that the whole screen blinks as an old CRT monitor which causes this negative effect.
I found an app which could help us to workaround this issue. I filed a feature request. So if you are interested you can add yourself to wathcher list and post a comment here - https://bitbucket.org/VitoCassisi/lux/issue/38/lux-auto-brightness-feature-request-for
This should not take a lot of time since you can authorise there with your google/facebook/twitter or other account.
Wow! I switched the screen to "natural", the problem with oversaturared, too rich colors was solved. I had to keep the brightness low so color pictures aren't too bright, but this made reading text on white backround unpleasant. Of course now I have to find new brightness levels (what brightness levels do you guys use for day and night?)
PS: Samsung has been doing similar tricks with the colors in their TVs. Some series 6 TVs made the picture look like it was from a heat sensor in dynsmic mode, and this was their default mode.
PPS: Mobile screens suck. LCDs have washed out blacks which strains the eyes, and AMOLEDs don't care about correct colors which makes you duzzy.
S3 screen flickers!
MetQuota said:
I also immidiately noticed eye fatique after getting Galaxy s3, particularly in my right eye. It started only getting worse, and coincidently only when I was using Galaxy. Other lcd devices such as older 3gs never bothered me at all. Surpisingly majority of reviews call the display stunning quality, but its pretty dim, practically unusable outside and colors are unnaturally oversaturated, all of which didnt bother me that much as long as my eyes wouldnt hurt so much. I started reading more about specs in Super amoled technology, but nothing pointed out to potensial issues, than I googled galaxy s3 refresh rate, and the first video from the search result comparing s3 to the iphone, provided a major clue. The poor quality camera was picking up horrible flickering from galaxy, but iphone screen didnt flicker at all. It instantly brought me back to old CRT days, and I also remember getting dizzy from such displays running at low refresh rates of 60mhz. Back than bumping up refresh rate to 75mhz conciderably dicreased eye strain. I took the video to the store, sales person was suprised that I was returning such popular product, but its been a day since my exchange for another brand and eye strain is gone. The issue maybe overlooked as it affects low percentage of people, but if you have sensitive vision, than you'd be much better off with non hd amoled technology
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You are absolutely right. S3 screen flickers a lot. Try to move it quickly in front of your eyes, move your eyest when looking at it, or move your finger fast in front of the screen. I certainly do notice it.
What other phones have better displays? Sony? HTC?
I have a solution to resolve galaxy S3 scren flickering: set brightness to max in settings, install an app like "Screen Filter" (one with black-white rectangle) and decrease brightness there, in the app.
Flickering gone!
yarmobile said:
You are absolutely right. S3 screen flickers a lot. Try to move it quickly in front of your eyes, move your eyest when looking at it, or move your finger fast in front of the screen. I certainly do notice it.
What other phones have better displays? Sony? HTC?
I have a solution to resolve galaxy S3 scren flickering: set brightness to max in settings, install an app like "Screen Filter" (one with black-white rectangle) and decrease brightness there, in the app.
Flickering gone!
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Most of phone LCD screens are not affected by flicker. Even some amoled displays too. For example old HTC Legend and galaxy S2.
Galaxy note 3, 4, Galaxy s4, 5 are also affected. I strongly recommend you not to buy any new samsung phones equipped with AMOLED screens.
Now with this https://play.google.com/store/apps/details?id=com.vito.lux software you can get rid of screen flickering issue. Automatic brightness adjust will also work.
I was wondering from my understanding the amoled turns off the leds that are within the black area of the screen display. So if I turn my wallpaper and most layouts into black colour will that help reduce the battery consumption through the screen or will it be almost insignificant?
Sent from the Rabbit Hole
I would say insignificant at the risk of not enjoying your phone. Does it really matter if you squeeze out an extra 30, maybe 60, minutes at the expense of not just using it and enjoying it?
Everyone spends too much time obsessing over cranking out every last little bit that they forget to stop and smell the roses.
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I would love to help you, but help yourself first: ask a better question
http://www.catb.org/~esr/faqs/smart-questions.html
According to the quoted site, a white pixel on a SAMOLED screen takes up nearly 6 times as much power as a black pixel, as all sub-pixels need to be lit fully. Being that the screen is by FAR the biggest consumer of battery on our devices, I'd suspect that turning down brightness and throwing on some black backgrounds will make a difference. The site also analyses average battery gain (on non-pure backgrounds):
http://blog.stevemould.com/phone-battery-save-black-wallpaper/
This guy tested SGS3 and concluded 3 hours extra battery life, regardless of brightness: http://forum.xda-developers.com/showthread.php?t=1882467
If you're indifferent, then pick black. If you can't stand black, then pick white.
spycedtx said:
I would say insignificant at the risk of not enjoying your phone. Does it really matter if you squeeze out an extra 30, maybe 60, minutes at the expense of not just using it and enjoying it?
Everyone spends too much time obsessing over cranking out every last little bit that they forget to stop and smell the roses.
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I would love to help you, but help yourself first: ask a better question
http://www.catb.org/~esr/faqs/smart-questions.html
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In my line of work, involving alot of field work where I do not have the luxury to charge my phone whenever I want, it matters. Besides I do smell the roses...even in black.
Sent from the Rabbit Hole
Incase youre wondering what this job might be that doesnt even have electric sockets in close proximity ..im trapped in a chamber for a month doing saturation dives where I only get to charge my phone once every 2 days.
Sent from the Rabbit Hole
Then I'd say get a second, even 3rd, battery and crank up the colors.
And, to be fair, your situation is obviously on the extreme compared to everyone else trying to max juice.
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I would love to help you, but help yourself first: ask a better question
http://www.catb.org/~esr/faqs/smart-questions.html
Black is beautiful on amoled. ..I use the dark background on tapatalk. ..I wish Google currents had a black background. ..hope they introduce it.
scribbled from my note 2 (N7100)
Yes, it will help a little bit.
More info @ How to improve Samsung Galaxy Note 2 battery life?
So I finally got my f3, it has been perfect in every aspect, even the screen looks good, but the eye fatigue is simply too much.
I have tried to reduce DPI to minimum, reduce brightness, use reading + paper mode. After these changes it did get noticeably better, but it is still annoying.
I have Samsung galaxy s5 that also has an amoled display, but I don't get the same issue there. Also regular laptop and computer monitors are fine.
So anything to do on the software side to make it better? If not, then what other similar phone would you recommend that has a different screen.
Have you tried enabling DC dimming? For some people (not everyone) the PWM flickering causes some discomfort. I can't see any difference, but I'm glad the option is there.
gondsman said:
Have you tried enabling DC dimming? For some people (not everyone) the PWM flickering causes some discomfort. I can't see any difference, but I'm glad the option is there.
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F3 does not have DC dimming.
The option is there on custom roms, I assumed it was available on stock as well.
Do you know why you have eye fatique? What's the problem?
dreamytom said:
Do you know why you have eye fatique? What's the problem?
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The text and screen looks somehow muddy compared to LCD screen. Text is not as sharp, or at least eyes feel so, and it is harder to focus to text and objects.
Yes, the screen looks impressive, but can't really use it.
LCD screens are always sharper than their OLED counterparts, but hey there might be a slight problem with your eyes or maybe you've got sensitive eyes. therefore, I can only suggest that you get an LCD device or test an oled before buying. btw I have no problem with the panel even though I prefer LCD panels (no burn in issues in LCDs etc.).
there is still one small thing that I have noticed, there a very slight white line/shadow under the black text and it's more noticeable when the text is bigger like when Im in settings, all the titles or texts seem to have that white shadow under them. Has any of you noticed that? I might make a thread for it later but I just dont care. the screen is waaaay better than my last OLED which was ROG phone 2 with red tint and huge bandings and awful black crush issues...
Kianush said:
LCD screens are always sharper than their OLED counterparts, but hey there might be a slight problem with your eyes or maybe you've got sensitive eyes. therefore, I can only suggest that you get an LCD device or test an oled before buying. btw I have no problem with the panel even though I prefer LCD panels (no burn in issues in LCDs etc.).
there is still one small thing that I have noticed, there a very slight white line/shadow under the black text and it's more noticeable when the text is bigger like when Im in settings, all the titles or texts seem to have that white shadow under them. Has any of you noticed that? I might make a thread for it later but I just dont care. the screen is waaaay better than my last OLED which was ROG phone 2 with red tint and huge bandings and awful black crush issues...
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I personally use Syberia and have no problems with shadows under text.
Thankfully, I don't have eye strain.
Never had a problem on my end you might want to bust some glasses