I've looked into various posts about extending battery life and I think I have a good grasp of what to do and what not to do.
However, I have one question for which I couldn't find a definitive answer. That is whether the number of bright vs dark pixels in the display affects battery life on the Nook HDs. From what I've found it seem that a) darker displays indeed do save energy for OLEDs and similar displays and that b) the Nook HD and HD+ have an LCD screen where there are no savings, whatever the brightness of the display. (I'm not talking of lowering the absolute display brightness in the Settings, that of course saves energy.)
This would mean that using darker screen themes on Nook HDs doesn't save one blind bit of battery juice. Right or wrong?
I believe you're thinking about amoled displays usually found in Samsung devices. Our screens are led I think so no energy savings with black.
Yeah, AMOLED seemed to be one type of display where more black pixels prolong battery life.
I take it, then, that for HD/HD+ displays, being no AMOLEDs (are they LCD? LED? does anyone know?), it'll make no difference.
Related
I recently compared my 4 month old Galaxy S-AMOLED display with a recently bought one.. There is visible difference between the maximum brightness in both screens. The newer one looks brighter with better colors when compared to my older Galaxy S. Both are GT-i9000 international version, and I used similar images to compare the screens..
Does the Super AMOLED display deteriorate with time? Also please tell me if this will covered under warranty..
It does deteriorate quite quickly. Especially the blue pixels. Not keeping it on high brightness levels helps the screen deteriorate less quick. And I'm not sure but I had read somewhere that when it comes to "burn in" if the effected area is greater than 8 pixels then you can replace it under guarantee.
Does the Super AMOLED display deteriorate with time? Also please tell me if this will covered under warranty..
Click to expand...
Click to collapse
Yes every lcd screen would die one day but Super AMOLED dies with burn in faster, but still would give you 3-5yrs of life.
On daily basis keep the brightness to low or lowest when you need to brighten up put finger on notification bar & slide it to right (bright) slide it to left (dark).
Hope this helps you to get more life from your lcd.
thanx a lot guys.. will go for warranty and let yawl know how it goes..
My Moto X screen looks too yellowish compared to other LCD display phones like Nexus, iPhone's etc. Is it the issue with Moto X's Amoled display or something is wrong with my device?
What you're noticing is just the inherent difference in color reproduction between AMOLED and IPS displays. Most IPS displays have cooler color temperatures and do a better job at producing a true white although with less color saturation.
That being said, I have gone though 2 Moto Xs and the first one came with a very poorly calibrated display and a gross greenish tint. My second one was much better, but I returned it for other reasons, future burn in being one of them. Burn in is different from the problem you're seeing and can best be described as bad tan lines. Some areas of the screen will have different brightness (mostly the nav and notification areas) and it will be obvious when you switch to landscape mode that something isn't right.
If you think something is wrong with your screen and still have a valid warranty, give Motorola a call and let them know about it. They seem to be pretty good about making things right.
No screen burn for me... Had the phone since January and mostly a heavy user too. Maybe no burn because I keep the brightness level down most of the time?
Sent from my XT1053 using XDA Premium 4 mobile app
Jayrod1980 said:
No screen burn for me... Had the phone since January and mostly a heavy user too. Maybe no burn because I keep the brightness level down most of the time?
Sent from my XT1053 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Frankly, it's just a case of not taking care of the fact that we're using OLED tech which is sensitive to static images much like Plasma tech. If you're on Kitkat and use transparent bars like most of us: I can't imagine how anyone could suffer from burn-in that won't go away with time.
http://forum.xda-developers.com/moto-x/general/fyi-dim-screen-moto-white-glove-t2753559
But I did not keep it long enough to notice burn.
No burn in here, but I use fullscreen so I don't have a notification or navigation bar.
makakalo said:
What you're noticing is just the inherent difference in color reproduction between AMOLED and IPS displays. Most IPS displays have cooler color temperatures and do a better job at producing a true white although with less color saturation.
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Click to collapse
This is absolutely wrong, no offence. IPS displays do not have any cooler colour temperature! They are less saturated than AMOLED displays mostly, and thus the colours look less vibrant, or more accurate if you will. At the same time they will look extremely dull / pale. If possible just look at the S5's display, it has the best white I have seen in a while, neither yellowish or bluish, near perfect.
And yes, I agree with OP, there is a slight Yellowish tint on mine. This reminds me of the the Galaxy S2's display panel. There is nothing you can do other than getting adjusted with it, but you can try increasing the Blue bias of the screen, to something like +3 or +4. There is an app called Screen Adjuster on Google Play to do that. I am using that now, never thought I would have to use it again since S2 days. By increasing the Blue bias the screen will look little "cooler", the Yellowish white will become Bluish white.
This has nothing to do with burn in by the way.
I should have been more clear about that. It's the backlight source that affects color temp the most. Since most IPS displays use white LEDs for backlighting they appear cooler than many (not all) AMOLED panels and older TN displays using CCFLs. Since the individual pixels are their own backlight with AMOLED there is more variability in color reproduction depending on use and calibration.
And it does have something to do with burn-in. If you have a mostly blue background then those subpixels will see more use than the red and green subpixels. Once the blue subpixels fade enough you're left with a yellow tinted screen. It's not burn-in in the traditional CRT sense, but it's still uneven wear. IMO: The small perks of Active Display are not worth having a screen that can be damaged by normal use.
http://forum.xda-developers.com/showthread.php?t=2404256
Questions go in the Q&A section.
I called up Motorola customer care and they asked me to visit nearest service center. They will have a look and decide if anything is wrong in the device. So, this yellowish tint is bit common in Moto X due to AMOLED screen.
rishi.gohil said:
I called up Motorola customer care and they asked me to visit nearest service center. They will have a look and decide if anything is wrong in the device. So, this yellowish tint is bit common in Moto X due to AMOLED screen.
Click to expand...
Click to collapse
It can be. There's a member around who got like 4 replacements or something....all with different degrees of it.
I find you don't notice it after a bit.... Unless you put 2 phones side by side.
Personally it doesn't bother me....it would if it was too yellow. I find the dimmer the screen, the more you notice it also.
My first moto x I had since October got burn in around January. I got a new one in June and I have burn in again. It isn't enough to warrant another replacement (yet).
Can someone explain to me how this phone suffers burn in? Burn in is a thing from old CRT televisions, not really the new LED screens (at least, to my knowledge)
i've always used gravitybox to give the statusbar a grayish color instead of black (and here lately the tinted statusbar xposed module) and keep it in expanded desktop with pie controls, so there's no nav bar, and not seeing any burn issues yet, had it since Dec. the horrifically bad burn in on my note 2 is what made me want to be extra careful with the x.
No burn in here after 7 months on mine nor my sister's Moto X.
fargles said:
Can someone explain to me how this phone suffers burn in? Burn in is a thing from old CRT televisions, not really the new LED screens (at least, to my knowledge)
Click to expand...
Click to collapse
Burn in is common in amoled type displays, specifically on phones such that rely on a nav bar instead of capacitive buttons. The longer the screen is on, or the higher the brightness, the bigger the possibility for screen burn in . Out of the three amoled phones I have owned, the two that have burnt in both had on screen nav bars. I hope this (non technical) summary helps
THIS AINT YOUR FATHER'S AMOLED SCREEN:
Are you having problems with your Tab S screen? Yellowing or mura effects in low light? Read this glowing in depth review of what the Tab S super amoled screen should be. If yours doesn't compare to what they describe here you may wish to consider an exchange. Good read.
http://www.gizmodo.com.au/2014/06/the-best-tablet-display-isnt-on-an-ipad/
Based on our extensive Lab tests and measurements, the Galaxy Tab S is the best performing tablet display that we have ever tested, not surprisingly with performance that is almost identical to the OLED Galaxy S5 Smartphone that we recently tested and found to be the Best Performing Smartphone Display. The Galaxy Tab S establishes new records for best Tablet display performance in: Highest Colour Accuracy, Infinite Contrast Ratio, Lowest Screen Reflectance, and smallest Brightness Variation with Viewing Angle. Both Galaxy Tab S models offer Quad HD 2560×1600 pixel displays (with 287 to 361 pixels per inch), currently the highest for tablets, with 4.1 megapixels, double the number on your HDTV. Where the Galaxy Tab S does very well but does not break performance records is in maximum display Brightness — the current record holder for tablets is the Nokia Lumia 2520 with 684 nits, while the Tab S has 546 nits with Automatic Brightness On and 415 nits under manual Brightness (10 per cent lower for mixed content with 50 per cent Average Picture Level APL and 25 per cent lower for an all white screen). High screen Brightness is only needed for High Ambient Light, so turning Automatic Brightness On will provide better screen visibility and also a longer battery running time. Its record low Screen Reflectance of 4.7 per cent further improves the effective screen Brightness, resulting in a very high Contrast Rating for High Ambient Light with Automatic Brightness On.
Click to expand...
Click to collapse
mitchellvii said:
THIS AINT YOUR FATHER'S AMOLED SCREEN:
Are you having problems with your Tab S screen? Yellowing or mura effects in low light? Read this glowing in depth review of what the Tab S super amoled screen should be. If yours doesn't compare to what they describe here you may wish to consider an exchange. Good read.
http://www.gizmodo.com.au/2014/06/the-best-tablet-display-isnt-on-an-ipad/
Click to expand...
Click to collapse
Thanks for the read. I don't see any mention to tests for a Mura effect though. The only reference to the screen uniformity doesn't refer to any kind of tests, just a general statement about OLED technology:
"Screen Uniformity
One subtle but important advantage of OLEDs is their excellent screen uniformity compared to LCDs, which often show hot spots and shadows from the edge LED lighting."
I will check in new stores tomorrow and look for mura effects, as well as check for stuttering. I so love the device besides for these flaws, that I sure hope to find one that will be doing good on every aspect.
ukael said:
Thanks for the read. I don't see any mention to tests for a Mura effect though. The only reference to the screen uniformity doesn't refer to any kind of tests, just a general statement about OLED technology:
"Screen Uniformity
One subtle but important advantage of OLEDs is their excellent screen uniformity compared to LCDs, which often show hot spots and shadows from the edge LED lighting."
I will check in new stores tomorrow and look for mura effects, as well as check for stuttering. I so love the device besides for these flaws, that I sure hope to find one that will be doing good on every aspect.
Click to expand...
Click to collapse
Cool. Here's one test you can run.
1) Have the sales person get out a box of the device you want.
2) Go to www.samsung.com
3) Open your account (if you don't have one create one).
4) Attempt to register the new tablet (you aren't actually going to register it).
5) Enter the tablet's serial number in the space given.
6) It will then indicate to you the manufactured date of that tablet.
7) You want something more recent than your problem tablet (which you've already checked using the same method) to ensure that new tablet is not part of the same flawed manufacturing run.
If the salesperson asks you what you are doing simply explain you are looking up the manufacture date and this is the only way to do it. You are not going to actually register the tablet.
*Also consider the 10.5 instead. They seem to be more stable and use a different structure in their screen than the 8.4.
I'm a bit hesitant to return to an AMOLED screen, but I've heard they've been much improved upon over the last couple years. Reviewers have so far gushed over the new Moto x screen. But, comparison shots where the X is placed next to screens of other top devices shows that the whites are "off". I'm not so concerned about somewhat oversaturated colors, but it's always the whites that bother me the most.
Is it possible for a kernel dev to come along and allow for the possibility to tune the color temperature, as has been done with other devices with IPS LCD screens? Or, is there something with an AMOLED that would make this impossible to do?
This will get better over time as blue degrades faster over time than red and green
Hi,
I'm planning to get the 64GB Blue Nexus 6 and i have a few questions before i buy:
I heard that the AMOLED Screen have some issues like burns on the screen. Is that true?
Also i heard about "pink" issues with brightness. This is true also?
Svid said:
Hi,
I'm planning to get the 64GB Blue Nexus 6 and i have a few questions before i buy:
I heard that the AMOLED Screen have some issues like burns on the screen. Is that true?
Also i heard about "pink" issues with brightness. This is true also?
Click to expand...
Click to collapse
Both are true.. But I don't have any issues on my device..
Danish2980 said:
Both are true.. But I don't have any issues on my device..
Click to expand...
Click to collapse
I saw some videos on youtube and they said inverting colors from time to time for a certin amount of time helps. This is true?
Svid said:
I saw some videos on youtube and they said inverting colors from time to time for a certin amount of time helps. This is true?
Click to expand...
Click to collapse
Also true..
Svid said:
Hi,
I'm planning to get the 64GB Blue Nexus 6 and i have a few questions before i buy:
I heard that the AMOLED Screen have some issues like burns on the screen. Is that true?
Also i heard about "pink" issues with brightness. This is true also?
Click to expand...
Click to collapse
The at&t variant I personally own never gave me these issues. I have read the pink tint issues were associated with the adaptive /automatic brightness enabled?! Yet, on mine I saw no pink with it enabled or disabled.
And there are videos on YT showing burn in. It is basically the soft keys at the bottom. Triangle, circle, and the square are the culprits. But again no issues for me.
Now the very 1st day my phone did a random reboot on me - twice! But, as soon as I unlocked bootloader, rooted it, and used a custom recovery the reboots never surfaced again! Go figure?! And the nexus 6 is definately the fastest performing phone I owned yet
Svid said:
Hi,
I'm planning to get the 64GB Blue Nexus 6 and i have a few questions before i buy:
I heard that the AMOLED Screen have some issues like burns on the screen. Is that true?
Also i heard about "pink" issues with brightness. This is true also?
Click to expand...
Click to collapse
AMOLED's can all have that issue, but I personally have never seen it happen (I have had a gnex for almost 2 years which used AMOLED and doesn't have burn-in). The pink "issue" isn't really an issue, google allowed the screen brightness to go extremely dark on the N6. This causes the screen to take on a pink tint simply due to the way amoled's function at that low a brightness. The screen does have a warmer hue to it as well because it is AMOLED, but you can use a custom kernel to tweak RGB values and give the screen a cooler tint. Hope that helps
gambit07 said:
AMOLED's can all have that issue, but I personally have never seen it happen (I have had a gnex for almost 2 years which used AMOLED and doesn't have burn-in). The pink "issue" isn't really an issue, google allowed the screen brightness to go extremely dark on the N6. This causes the screen to take on a pink tint simply due to the way amoled's function at that low a brightness. The screen does have a warmer hue to it as well because it is AMOLED, but you can use a custom kernel to tweak RGB values and give the screen a cooler tint. Hope that helps
Click to expand...
Click to collapse
Thank you for that useful information mate.
So, all AMOLED's, regardless if it's the N6 or not, suffer from this issue?
Svid said:
Thank you for that useful information mate.
So, all AMOLED's, regardless if it's the N6 or not, suffer from this issue?
Click to expand...
Click to collapse
That is correct, all AMOLED's are susceptible to this because of the O in AMOLED, which stands for Organic. The organic compounds that are used in these screens are susceptible to burn in due to the fact that the organic compounds degrade with a lot of use. Of the RGB subpixels, Blue subpixels degrade quickest. However, the N6 uses a Pentile pixel arrangement. This has upsides and downsides, but it is actually an upside as far as this issue is concerned, because the Pentile layout contains less blue subpixels, so there is less susceptibility to burn in.
If you want to combat this issue further, you can use blacked out google apps, and use ROM's with blacked out system options, use a mostly black wallpaper, etc. This is because on an AMOLED screen when the screen is black, the pixels are not displaying any light and thus are not degrading at all. This should reduce your chances of running into the issue. It will also save battery life since the screen is not using as much energy. That is one of the upsides to AMOLED screens, along with the very dark blacks you get in movies and games for the same reason (pixels are not lighting at all). Like I said, I've used other AMOLED screens and not run into this problem as of yet, to my understanding it should take years before you start to see burn in even with normal use. Some people say they have issues right away but that has not been my experience.
All screens of any technology are correctly color calibrated at a given brightness and are very far off at extremes. With an LCD, it will generally be too blue at high brightness and not blue enough at low brightness. That is because the backlights are never a 6500K source. They are basically always bluer than standard.
The Note 4, to pick an AMOLED example, does not get red at very low brightness, but that is because it (according to others) has a higher minimum brightness. My screen takes on a red tint when in a dark room with adaptive brightness enabled if I have the brightness slider set below about 30%. I consider this a handy feature since I don't like the feeling of staring into a light bulb.
Above about 30%, or in a room with a light on, the screen stays normal for me.
I have not seen thecpink issue on my N6 at all.
gambit07 said:
That is correct, all AMOLED's are susceptible to this because of the O in AMOLED, which stands for Organic. The organic compounds that are used in these screens are susceptible to burn in due to the fact that the organic compounds degrade with a lot of use. Of the RGB subpixels, Blue subpixels degrade quickest. However, the N6 uses a Pentile pixel arrangement. This has upsides and downsides, but it is actually an upside as far as this issue is concerned, because the Pentile layout contains less blue subpixels, so there is less susceptibility to burn in.
If you want to combat this issue further, you can use blacked out google apps, and use ROM's with blacked out system options, use a mostly black wallpaper, etc. This is because on an AMOLED screen when the screen is black, the pixels are not displaying any light and thus are not degrading at all. This should reduce your chances of running into the issue. It will also save battery life since the screen is not using as much energy. That is one of the upsides to AMOLED screens, along with the very dark blacks you get in movies and games for the same reason (pixels are not lighting at all). Like I said, I've used other AMOLED screens and not run into this problem as of yet, to my understanding it should take years before you start to see burn in even with normal use. Some people say they have issues right away but that has not been my experience.
Click to expand...
Click to collapse
Not sure about the bottom paragraph, surely you mean inverted colours? Also If you use a mostly black wallpaper you're more likely go get burn in because the pixels around navigation buttons aren't on at all and are thus not degrading whilst the navigation buttons are fully on and are degrading.
Sent from my Nexus 6 using XDA Free mobile app
letom said:
Not sure about the bottom paragraph, surely you mean inverted colours? Also If you use a mostly black wallpaper you're more likely go get burn in because the pixels around navigation buttons aren't on at all and are thus not degrading whilst the navigation buttons are fully on and are degrading.
Sent from my Nexus 6 using XDA Free mobile app
Click to expand...
Click to collapse
Inverted, blacked out, I don't think there's a difference. The button icons themselves will eventually burn in because they are almost always on unless you opt for pie like controls, but like I said that should be over a span of years. A black background will keep everything else from wearing faster though and should give you better battery performance.
I have had the phone for a week now and have not seen either of these issues. I do keep my screen fairly dim, like minimum brightness PLUS a screen dimmer for the nights and early mornings. I do not see any pink what so ever with adaptive brightness off and the minimum setting for brightness. I only turn the screen up when outdoors. I don't know I just find the screen really bright while indoors and I would assume burn in would be more susceptible with higher brightness
So i can safely buy the device right?
Anyway i have to order the phone overseas (No 64GB avalible in my country and the price tag too high anyway).