Database Users

Night-vision screen mode

Just came across this:
Some Android phones are now shipping with OLED displays, such as Nexus One, the Droid Incredible, and the Samsung Galaxy. Organic LED displays have separate pixel elements for each color channel (red, green, and blue), and each channel has a different efficiency.
Take, for example, the Nexus One. If powering only the red pixels at full intensity draws a current “i”, then powering all green pixels draws “1.5i”, and all blue pixels “2i”. (These ratios are derived from empirical measurements, and don’t hold in all cases.) Also, it’s worth noting that OLED displays don’t have backlights like LCD, meaning that darker colors draw less power.
...
Filtering to show only red pixels only requires 35% of the original baseline OLED panel current, on average. Adding back the baseline current, the best case overall is about 42% of the original system current, effectively doubling the battery life. Also, showing only red pixels doubles as an awesome night vision mode, perfect for astronomy.
If you’d like some other colors added back in, the amber and salmon filters can help, while still offering about 56% of the original system current. It’s also worth noting that the Nexus One OLED display uses a PenTile pixel layout, giving it twice as many directly-addressable green pixels as red and blue. Thus the Green-only filter results in the visually sharpest text.
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http://jsharkey.org/blog/2010/07/01/android-surfaceflinger-tricks-for-fun-and-profit/
I think it's a neat idea, it's a hardcore battery-saving trick and would surely make you look like a geek, but I could live with my screen being only red or green if I was going to write a text, read some rss feeds or basic text-only things like that.
Although I would be quite worried about shortening the life of the red AMOLED channel by doing this for a long time...

I saw that article on engadget today, i too would be very willing to go all red for that kinda current savings.

just read about this on androidandme, i would love to have this implemented for night viewing and what not.

I would think that you could also save quite a bit of battery power just by using white text on a black background for web pages and ebook reading instead of black on white.

malicious85 said:
just read about this on androidandme, i would love to have this implemented for night viewing and what not.
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I too would like this feature. Just switch the black with white text to black with red text.
Red text against a black background is supposedly easier for your eyes at night, too. I can't find a source to back that up, but i seem to recall that the longer wavelength keeps your eyes dilated, thus better able to see at night.

vincentm said:
I too would like this feature. Just switch the black with white text to black with red text.
Red text against a black background is supposedly easier for your eyes at night, too. I can't find a source to back that up, but i seem to recall that the longer wavelength keeps your eyes dilated, thus better able to see at night.
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^this. thats why spec ops have red flash lights. less strain on the eye + better vision

Very Interesting...would be a great feature

Real savings are much less since screen is not on all the time.
Sent from my Nexus One using XDA App

I hope some devs read about this.
Someone should forward this to Mister Cyanogen
I betcha his team could do something remarkable with this.

For some of the uses I'd like to use the OS for, this would have huge benefits.

I have also heard that the lifespan of the blue color in an amoled screen is significantly shorter than red and green, so maybe it could also be used to compensate this a little.
I really would love to see this included in a rom, let's hope some of the gurus here find it interesting too!

Cyanogen already added it yesterday in his mod http://github.com/cyanogen/android_development/commit/3d7046b51e7e08a66eb0958e7819b5961fee1484

eug89 said:
Cyanogen already added it yesterday in his mod http://github.com/cyanogen/android_development/commit/3d7046b51e7e08a66eb0958e7819b5961fee1484
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great! I was always reluctant to use cyanogenmod due to its (perceived) battery usage, now this could be gone

make it an option when ur battery is below 15%, terminator mode.

Make Taskbar Grey?

Is there any way to change the taskbar at the top from black to gray like stock android?

http://forum.xda-developers.com/showthread.php?t=730175
The dark grey it is now is useless, I'd turn it black and spare battery and burn in problems...

Hey thats my morph... The text is still white... And it should have the h symbol... It works though.. What are these burn in and battery problems you talk about?
I don't think it was ever proven a black led uses less power than white and my g1 has had a white bar for almost 2 years and no burn in problems...
Sent from my SGH-T959 using XDA App

G1 was LCD pixels were lit regardless of color displayed.
On an AMOLED screen pixels represent black by turning off. Black cannot be burned in and will not use battery. The symbols could still burn in eventually but fortunately the time is always changing as are the signal bars on tmobile
There is plenty of proof floating around from the nexus one (also amoled) saving battery by having a black theme. I'm not gonna dig it up, it's there. They ran multiple tests on identical phones black saved most then red, I think green and blue were mid and of course white is the worst.

So your saying lcd screens don't have burn in? Or that oled is worse? Not meaning to put words in your mouth... I just enjoy a white/light look..
I still think that is a marketing ploy by apple not to buy oled screens..
I think the phone will be obselete by the time it starts to deteriorate...
Sent from my SGH-T959 using XDA App

junkdruggler said:
So your saying lcd screens don't have burn in? Or that oled is worse? Not meaning to put words in your mouth... I just enjoy a white/light look..
I still think that is a marketing ploy by apple not to buy oled screens..
I think the phone will be obselete by the time it starts to deteriorate...
Sent from my SGH-T959 using XDA App
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LCD does have burn in, the difference is on LCD any color can cause it, so on a g1 making the bar black has no benefit.
I'm not trying to tell you what to like, believe me I love android's ability to let us have this choice/conversation.
Clearly google agrees with you on preferring a white look: first the notification bar, then the market, now maps.
I agree deterioration will probably not be an issue for most, as long as you don't set it to stay awake while charging and leave it in a browser window or something all day every day.

Also, what did apple say about oled? I dint know they had a stance on it. I figured they would be going there soon for either phones or laptops

You think there'd be an easy way to do this.. I don't know why but I'm highly turned off by the black bar. Brings back memories of the WinMo nightmare. Lol

I'll send a message to cloverdale and manup... See if one of them went to change the xml so we can have black font in the status bar...
Sent from my SGH-T959 using XDA App

Actually modern LCD displays do not suffer from burn in. I have had an LCD monitor on my windows computer with the exact same taskbar displayed for months and even years, with zero burn in. I have no idea about OLED though.
What's more, even if LCD did suffer burn in, changing the taskbar to black would then cause the taskbar area to not burn in while the rest of the screen did, leading to a situation where you could still see the spot on the screen where the taskbar resided. That's why a lot of plasma TVs and dvd players have the option of putting grey bars on the side of an image that does not fill the screen, with the idea that the grey is closest to what the rest of the display is showing.
The bottom line is I don't think anyone needs to worry about burning in their LCD screen. This is the Vibrant forum, so we should be concerned only about OLED here. So, does anyone have a real answer about burn in on OLED screens? Wikipedia seems to think so http://en.wikipedia.org/wiki/Organic_LED.

So the life is 5 years at 8 hours a day? Half life is about 30 months... Like I said before... We will probably have a new phone by the time out screen starts to be less "vibrant"
Sent from my SGH-T959 using XDA App

[Q] Galaxy S2 Display...

Hi People,
I have recently got Galaxy S2 and i was comparing it with my older Galaxy S(I-9000)
I was playing same video file in both devices with 0% & 100% brightness.
In my view, Galaxy S was more brighter and natural looking. Where as Galaxy S2 was king of dull. I mean say at 0% brightness, galaxy S was better and same with both the devices were on 100% brightness.
Technically Galaxy S2 screen is better.
Experts - Can anyone of you feel this way? or it is just my observation.
I have also kept the live wall paper "Spring Zen Free" that also was showing better on my galaxy S.
Even in setting screen, white text on black background was looking better in Galaxy S.
Any one has any idea why it is happening like it?
Plz plz comment.
Regards,
Anoop.

My SGS2 better than my SGS1 .
XDA member review .
You’ve probably read a little on other reviews about the video playback, it’s uniformly been reported as excellent. It is. In fact I would go so far as to say its peerless in the mobile phone world, and by a large margin (its nearest competitor being original Galaxy S as it happens,
http://blog.clove.co.uk/2011/05/31/samsung-galaxy-sii-real-user-review-part-3-media/
http://forum.xda-developers.com/showthread.php?t=1125839
jje

Hello JJE,
Thanks for your quick reply. But could you please tell me that, at 0% brighness of both devices, Galaxy S2 is dull or it is same clear and crisp as Galaxy S?
As i feel it very much that, at 0%, Galaxy S is still brighter than S2.
Is it because they want to increase the battery life?
Kindly revert with your expert comments..
Regards,
Anoop.

Sorry cannot test now sold my SGS1 .
jje

Hi JJE,
One last question on Galaxy S2. on the bottom tray of home screen of Galaxy S2, you will see "Phone" button which is has got a phone icon with Green background.
Do you see some sun rays like texture (diagonal small lines covering green portion) in the green icon? I just want to make sure that, I too have similar texture for that phone button and it is not something defect in the screen. (you might have to look closely)
Similar structure can be seen in "Applications" icon/button on home screen (which is blue in color)
Kindly let me know.
Regards,
Anoop.

Did you turn the screen power option off? even at 100% brightness, it's not actually at 100% brightness until you turn it off. Also go into the background effect to change the color temp

Play with these settings, it alters the display greatly...
Background effect: Dynamic, Standard, Movie?
Auto adjust screen power: Checked? Unchecked?
Browser brightness: Auto off? Auto on?
Display brightness: Auto off? Auto on?

I have to agree, s 2 is duller than my s (i now have both), maybe a power save feature that you can't turn off ? I've also noticed the yellow tint on s 2, compared to a blue tint on the s, and this can vary depending on what background effect you have selected ! This leads me to believe the colour temp could me changed in software. My itouch has a pinky looking tint compared to either galaxy phone.
Sent from my GT-I9100 using XDA App

leeboy22001 said:
I have to agree, s 2 is duller than my s (i now have both), maybe a power save feature that you can't turn off ? I've also noticed the yellow tint on s 2, compared to a blue tint on the s, and this can vary depending on what background effect you have selected ! This leads me to believe the colour temp could me changed in software. My itouch has a pinky looking tint compared to either galaxy phone.
Sent from my GT-I9100 using XDA App
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Which background setting are you using? Power save feature can be turned off by unticking.

I've sold my sgs too. However there was a week when I had both and I can tell you for certain that the sgsII screen is more natural t in colour then sgs's. Having them both side by side the sgs just looks b l u e. Like really blue.
SgsII screen is the best mobile screen I've used
Sent from my GT-I9100 using XDA Premium App

Thanks all of you, but as i mentioned in my second message,
One last question on Galaxy S2. on the bottom tray of home screen of Galaxy S2, you will see "Phone" button which is has got a phone icon with Green background.
Do you see some sun rays like texture (diagonal small lines covering green portion) in the green icon? I just want to make sure that, I too have similar texture for that phone button and it is not something defect in the screen. (you might have to look closely)
Similar structure can be seen in "Applications" icon/button on home screen (which is blue in color)
Kindly let me know.
Any comments on above?

anoop19b80 said:
Do you see some sun rays like texture (diagonal small lines covering green portion) in the green icon? I just want to make sure that, I too have similar texture for that phone button and it is not something defect in the screen. (you might have to look closely)
Similar structure can be seen in "Applications" icon/button on home screen (which is blue in color)
Kindly let me know.
Any comments on above?
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Click to collapse
Yes. Icons look just the way you described. It's normal, it's not a display problem.

Temp fix for different calibrated screens

I was just reading stuff on the Samsung forums unfortunately S4 user are having issues with red and pink push which leads to smearing on their screens while scrolling I found a link for a app that lets u calibrate red,blue,green on our displays even lets you adjust the contrast.This should help until we get a perm fix.The app is called screen adjuster ...Post results so we can figure out the best setting..https://play.google.com/store/apps/...t=W251bGwsMSwyLDEsImNvbS5uZXRtYW5zbGFiLnNhIl0.

Works ok (I've used it ever since they took away native kernel level controls in CM versions later than CM7)
Just be aware all it can do is *add* light. It bumps up the R G or B values for every pixel in the entire panel at the same time, even black. So at some point blacks will start to look washed out. This lowers contrast generally and does nothing to help gamma.
My personal recommendation is to just use two of the three RGB sliders (you shouldn't ever need to use all three unless you like your blacks to be some perfectly calibrated shade of gray instead), ignore other settings. The HTC One does not have an OLED display like a nexus.
Sent from my PC36100 using xda app-developers app

[Q] Lollipop background is blinding white

Please don't jump all over me. I searched for a solution for the new blinding white background that arrived with Lollipop, but I couldn't find anything. Android Central had nothing to offer and neither did any of the other Android forums.
I am legally blind in one eye. Bright light causes great eye strain and acute pain in my eye. Because of this new blinding white screen, I have great difficulty using my phone. I run the brightness below 10% and then read the screen with my weak eye closed. It sucks and it's ridiculous that I have to do this. I emailed Samsung and they basically told me to pound sand. I will see if the American disabilities groups can help me with that but, until then, is there anything I can do to dull the teal color and blinding white background in the notification panel and settings screens? I used Nova to change the app drawer background color to gray and am using the Hackers keyboard to replace the white keyboard. Beyond that, there doesn't seem to be anything I can do. No, the vision settings under the accessibility options doesn't help because it turns that ugly bright teal into blinding neon red to contrast with the white text and black background. Good grief.
I haven't rooted my phone, but I will as soon as I do a new back up.
I thought amongst all you programming gurus, someone might be able to help me. Am I missing a setting? Samsung told me to download a theme. Great, Big help.
Thank you for your time.
tunie

https://play.google.com/store/apps/details?id=com.haxor

Thanks. The problem with all the dimmers I've tried is that they dim everything, which of course makes it difficult to read text.
Well, I've read a lot of complaints on the web about the brightness issue, but I guess everyone in here likes it. I love my Note, but what good is it if I have difficulty using it. Imagine if every time you looked at your screen, you got an eye strain headache and your eyes watered and hurt. It's like if MS installed a blazing bright neon yellow background on your laptop that you couldn't change. I'm sure at least a few people would seek out a fix to adjust it.
Thanks anyway. I guess I'm on my own.

Custom ROM that allows for mitigating the blinding white background?
So, I found this thread http://www.quora.com/Why-does-Andro...ckground-instead-of-black-Do-people-like-that They mention custom ROM's. Are there custom ROM's in here that either dim the background of the notification panel and settings screen or allow for customization? I don't even care what else is effected, as long as I can get rid of the blinding white background.
I hope this is the right forum for this question.
Thanks.

Hmm, you could downgrade to KK ? I downgraded a few days ago too.

I know what you mean. I suffer from severe migraines.
Anything with a white screen I can't use for more than 2 minutes at a time. After that every glance feels like knives in my eyes and skull.
Even as a designer I don't understand this obsession with white backgrounds. It drains battery and white on a screen, particularly LED, has been proven time and time again to be very bad for your eyes. It is also common knowledge that light text on a dark background increases legibility. I fully blame Apple for this disgusting white trend.
And until I can choose my own background, or at least choose between white and black, I'm staying on KitKat. Maybe Android M will use its brains instead of 'look at meeeeeee I like to ruin your eyesight!'
Sent From My Samsung Galaxy Note 3 N9005 Using Tapatalk

Your only option is to go back to KitKat for the time being, I think.
I feel you though, I had the same headache thingy when I read stuffs on a dark/black background, I guess it depends on the person, how the eyes react to a colour, some prefer the dark, some the other.
There is a PC forum site called hardforum.com, and I can't even visit that site even when that site is pretty darn good. The first time I was reading stuffs there after five minutes or so I felt like I'd vomit on the keyboard!

devilsdouble said:
There is a PC forum site called hardforum.com, and I can't even visit that site even when that site is pretty darn good. The first time I was reading stuffs there after five minutes or so I felt like I'd vomit on the keyboard!
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That's because whomever designed that forum (Is that Vbulletin/proboards? Haven't seen one of those in ages!) is obviously colourblind and 5 years old.
It's not just you, that forum's design is giving me a headache as well, a double one. One from the nauseating colourscheme and one from the painfully 2001 design.
Sent From My Samsung Galaxy Note 3 N9005 Using Tapatalk