Database Develop

[Q] Jeff Sharkey's AMOLED "night mode"

Has anyone attempted to/willing to try to implement this on the Captivate?
jsharkey.org/blog/2010/07/01/android-surfaceflinger-tricks-for-fun-and-profit/

This is really interesting. I'm into astronomy and it would be awesome to not have the phone blind me everytime I turn it on during an observing session to use it for google sky and the atomic clock.

Apparently no dev types are interested enough to tell us that they are not interested.

asrrin29 said:
This is really interesting. I'm into astronomy and it would be awesome to not have the phone blind me everytime I turn it on during an observing session to use it for google sky and the atomic clock.
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No doubt.
This thing is blinding even on the lowest brightness setting.

Yes, the brightness is pretty ridiculous. Is this because of the AMOLED screen? Can't set brightness below "blinding" due to no backlight?

I have heard that the leaked I897UCJH2 rom has a lower mininal brightness; which might help with the blinding brightness at night, and also helps bettery a bit.
Not sure if you guys are interested in leaked ROMs but I'm sure if Samsung does not release it that a cook will make a custom rom from it.

looks awesome

Bump.
I think this would be extremely useful.

/agree to post above me

asrrin29 said:
This is really interesting. I'm into astronomy and it would be awesome to not have the phone blind me everytime I turn it on during an observing session to use it for google sky and the atomic clock.
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Me too. I'm jealous of the iphone star map program. The authors were smart enough to make it all black and red. You can tell none of the google authors star gaze in their spare time with all that color.

k2snowboards88 said:
Me too. I'm jealous of the iphone star map program. The authors were smart enough to make it all black and red. You can tell none of the google authors star gaze in their spare time with all that color.
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on Google sky map theres a night mode option when you press the menu key.

I seem to recal hearing that at a certain point when the voltage is too low the screen will still work, but you see glitches/artifacts.
So im assuming this is why the min brightness is set where it is.

Berserk87 said:
I seem to recal hearing that at a certain point when the voltage is too low the screen will still work, but you see glitches/artifacts.
So im assuming this is why the min brightness is set where it is.
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There is that very low brightness that occurs when you have less than 10% battery life. I wish they would make that brightness user selectable.

Even if the screen cannot be physically set below a certain level of brightness, it would be trivial to have the OS do the equivalent of putting a partially-transparent black rectangle over the screen. Sure, color fidelity would suffer, but it would be a welcome option anyway--I have seriously considered wearing sunglasses in bed.

Tinyboss said:
Even if the screen cannot be physically set below a certain level of brightness, it would be trivial to have the OS do the equivalent of putting a partially-transparent black rectangle over the screen. Sure, color fidelity would suffer, but it would be a welcome option anyway--I have seriously considered wearing sunglasses in bed.
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wow, i think your right.
instead of trying to set the brighness lower just put a transparent gray object that sites on top of all the windows.
It would have the same effect and save tons of battery.

You can!
k2snowboards88 said:
There is that very low brightness that occurs when you have less than 10% battery life. I wish they would make that brightness user selectable.
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Search for a widget called Curvefish Brightness Level in the market. Set it to 0% brightness, which appears to be the same as the low battery life brightness.

k2snowboards88 said:
Me too. I'm jealous of the iphone star map program. The authors were smart enough to make it all black and red. You can tell none of the google authors star gaze in their spare time with all that color.
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the google sky map version I have turns black and red in night mode

display issue with super-amoled

or my screen have problem.
download display color test from market or any other aplication
set your display light to manual and lower one possible.now open display color test, or any other picture and you whil see.... some orizontal lines like gradients.
(for me i can use a lower light to 40 %).
tell me your experience.
please.

Light lowered as low as possible... no probleme here

With some less intensive colors I could make out some kind of lines but I had to watch pretty closely to notice them. If I hadn't been searching for them, I probably wouldn't even have noticed. So it's nothing I would worry about, unless they are more pronounced for you.

CazeW said:
With some less intensive colors I could make out some kind of lines but I had to watch pretty closely to notice them. If I hadn't been searching for them, I probably wouldn't even have noticed. So it's nothing I would worry about, unless they are more pronounced for you.
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for me are pronunced with lover ligt

same here, especially for grey colors, i noticed this first in the application "Programm Manager" (German TV guide) at the home screen.

[Q] Faulty screen?

I have a question about the screen on the SGS, i just got one and when i look closely on the screen I see small dots. Kind of like a chessboard feeling, I noted it first when I looked closely at the "Application" ikon in the bottom right corner. The four white fields look almost like small chessboards except that the "black" squares are more grayish and not black as in a real chessboard .
I'm wondering if my screen is somehow faulty or if it is supposed to look like that?

Jac_83 said:
I have a question about the screen on the SGS, i just got one and when i look closely on the screen I see small dots. Kind of like a chessboard feeling, I noted it first when I looked closely at the "Application" ikon in the bottom right corner. The four white fields look almost like small chessboards except that the "black" squares are more grayish and not black as in a real chessboard .
I'm wondering if my screen is somehow faulty or if it is supposed to look like that?
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Try to do a screen test. Type in the phone (*#0*#)

okey, what am I looking for in the screentest, I have done that before, as I recall there are just at series of color test, the pattern im speaking of is on the whole screen, almost as if it was low resolution or something, I saw some information on a thread about this, but I cant find it anymore.

Bring it to a service center/phone shop, compare it to whatever display models they have? If you see a difference, you can turn it in on the spot

Jac_83 said:
okey, what am I looking for in the screentest, I have done that before, as I recall there are just at series of color test, the pattern im speaking of is on the whole screen, almost as if it was low resolution or something, I saw some information on a thread about this, but I cant find it anymore.
Click to expand...
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Can you do a pic of it?...

Jac_83 said:
I have a question about the screen on the SGS, i just got one and when i look closely on the screen I see small dots. Kind of like a chessboard feeling, I noted it first when I looked closely at the "Application" ikon in the bottom right corner. The four white fields look almost like small chessboards except that the "black" squares are more grayish and not black as in a real chessboard .
I'm wondering if my screen is somehow faulty or if it is supposed to look like that?
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Click to collapse
That's called the pentile effect. Just google pentile. Its how it is there is nothing you can be about it, although from a normal distace you can't see it. Its most visible on gray i think.

bcam117 said:
That's called the pentile effect. Just google pentile. Its how it is there is nothing you can be about it, although from a normal distace you can't see it. Its most visible on gray i think.
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Listen to this guy.
Samsung used a pentile matrix (one pixel now consists of 5 sub pixels - 2 small red, 2 small green and 1 large blue) for some strange reason. I'm only taking a guess here but I figure it has something to do with the way OLED screens degrade. Blue degrades the fastest so I guess it makes sense to have it the largest as it will then have more "say" in the colors that are made. This is the same reason people complain that their screen is blue when it's supposed to be white. It is this same layout that makes the grid pattern and text harder to read than retina displays.

Thank you for the information, I was worried that i had some "resolution" issue. And true enough at normal distance it's no issue. I only noticed it while comparing some stuff to a friends iPhone4.
I have a buddy with a SGS, gonna compare to his "just in case".
I've heard people talk about dithering so I thought I might as well ask, for example while starting the samsung app the blueish background image is indeed dithered on my device, is that normal? Also when playing a video (stock player) the menu where you can scroll consist of lines of gray instead of being smoothly gradient.

i have this gradient issue either. there are steps in color gradient, is this normal??
for example when u look at the grey parts of the battery when ure charging the phone while it's off. or the samsung apps loading screen. and many more...

Xperia SP vertical lines on screen

I noticed this while browsing the play store.. on light backgrounds or where the background is a single colour there is vertical greyish lines on the screen. They are spaced evenly with each line about 1/3 of the width of the space between them.
Someone posted a picture of it here which shows what I'm talking about
http://talk.sonymobile.com/t5/Xperi...isibly-on-bright-white-background/td-p/427227
Is this how the screen is meant to be?

spix123 said:
I noticed this while browsing the play store.. on light backgrounds or where the background is a single colour there is vertical greyish lines on the screen. They are spaced evenly with each line about 1/3 of the width of the space between them.
Someone posted a picture of it here which shows what I'm talking about
http://talk.sonymobile.com/t5/Xperi...isibly-on-bright-white-background/td-p/427227
Is this how the screen is meant to be?
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Click to collapse
This is normal. With my XSP it's the same and I think this is caused by the display and all SP's should have that so don't worry
edit: What I mean with "this is caused by the display" is that I think that under the display is something, that has vertical stripes and because the screen is quite transparent you can see it in a special perspective

spix123 said:
I noticed this while browsing the play store.. on light backgrounds or where the background is a single colour there is vertical greyish lines on the screen. They are spaced evenly with each line about 1/3 of the width of the space between them.
Someone posted a picture of it here which shows what I'm talking about
http://talk.sonymobile.com/t5/Xperi...isibly-on-bright-white-background/td-p/427227
Is this how the screen is meant to be?
Click to expand...
Click to collapse
My phone has it too. I noticed it the first time I powered on the phone. I try very hard to ignore it everytime I see it

Good to know its normal.
I think it may be because of the glove mode feature, like some sensor under the screen that lets you use it without touch.

spix123 said:
Good to know its normal.
I think it may be because of the glove mode feature, like some sensor under the screen that lets you use it without touch.
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I don't think so. Before I had the SP i had the Xperia P without glove mode and it also had those stripes. Because it got broken I unscrewed it and the display as one had those stripes. Maybe just the touch sensors Whatever, for me it's not a problem ;D

few days ago I bought xperia sp. before buying looked at dozens reviews and non of them was pointing to this problem. I mean that there is visible vertical lines on bright backgrounds. I would never bought sp if knew that. how its possible that this phone is 12 by user rankings in gsmarena? are those users blind????

AMOLED Color: Which do you Prefer, Warmer Displays or Cooler Displays?

AMOLED Screens tend to differ from display to display, some users get displays presenting a warmer yellow color in presence of white while others get displays presenting a cooler bluish tint in presence of white.
Which presentation would you prefer in terms color appearances on AMOLED Displays (when using the Default Mode: Adaptive Display)? Warmer Displays or Cooler Displays?

I'll be honest when I say that 9300K "blue/cool" whites look more like true white to me, but the industry standards like sRGB, Rec. 709, etc. call for a 6500K "yellow/warm" white point and that leaves my hands tied when calibrating my displays for accuracy.
On that note, Android could use something like system-wide ICC profiles...

In Basic Mode, the display appears more yellow. However, in Adaptive Display, the display look "more cool."
Apart from these Modes, the displays are predisposed to a cool or warm tint, that makes the display appear either cool or warm (sometimes attributes to the pink or yellow tint in presence of whites).
NamelessFragger said:
I'll be honest when I say that 9300K "blue/cool" whites look more like true white to me, but the industry standards like sRGB, Rec. 709, etc. call for a 6500K "yellow/warm" white point and that leaves my hands tied when calibrating my displays for accuracy.
On that note, Android could use something like system-wide ICC profiles...
Click to expand...
Click to collapse

I'll be honest. I've never taken the time to understand AMOLED Technology. It was more the active matrix part but I'll be the first to vote that I didn't.

arjun90 said:
In Basic Mode, the display appears more yellow. However, in Adaptive Display, the display look "more cool."
Apart from these Modes, the displays are predisposed to a cool or warm tint, that makes the display appear either cool or warm (sometimes attributes to the pink or yellow tint in presence of whites).
Click to expand...
Click to collapse
I'm quite aware of the screen modes, but the white point color temperature and overall gamut (wider gamuts -> more saturation, deeper primaries) are only part of the whole color accuracy equation. The gamma is still far, far off from the 2.2 reference no matter what mode is used. Just open this up in your browser, then you'll wish you had some gamma adjustments somewhere on the Note 4. Maybe Lollipop will save us?
http://www.lagom.nl/lcd-test/gamma_calibration.php
Overall, though, I'd say the most important thing is consistency, which is why standards exist. However, a lot of white LED-lit LCDs and such are much closer to those 9300K blue-ish whites. Mixing those up with some warmer 6500K yellow-ish whites is really jarring, and I can speak from experience there. I'd say for personal use, it doesn't really matter which you use so long as all your displays look consistent next to each other.

I prefer a bluer tint, but only slightly. None of this Xperia Z3 blow your face off blue.
I haven't seen a yellowish screen for a while though. The Note 4 I have leans towards Red or Blue and most other phones i've used lean from red to blue. Mainly red though.

I dislike 6500K, I always have.. For me 6500k white isn't white, it's yellow.

rj3005 said:
I dislike 6500K, I always have.. For me 6500k white isn't white, it's yellow.
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been follwing this for quite time and yes I agree with your post. Being on the note 3 camp , it's the same **** on our end. Recently encho
has been implementing KCAL to aid with changing our color temperatures. More developers should make it a standard to include KCAL in snapdragons.