Develop Bugs

The color white...

Has anyone else noticed that the ET4G's screen isn't that great when it comes to the color white?
When compared to my Evo4G,
pictures and video - ET4G wins - main colors are "colors"
websites with white backgrounds, pdfs etc - Evo4G wins
To me it looks like the white just isn't as bright, kind of like how the Evo's black isn't as black as the ET4G's black... if that makes any sense.
Is it just my eyes or my device?
ps I love this thing, not trolling, just trying to figure out if this is just me

Par for the course on SAMOLED screens. On SAMOLED vs. LCD, blacks are better but whites are worse, generally speaking.

I only notice it with my brightness turned down. Looks better at dull brightness (of course)
Sent from my SPH-D710 using xda premium

R1ptide said:
Has anyone else noticed that the ET4G's screen isn't that great when it comes to the color white?
When compared to my Evo4G,
pictures and video - ET4G wins - main colors are "colors"
websites with white backgrounds, pdfs etc - Evo4G wins
To me it looks like the white just isn't as bright, kind of like how the Evo's black isn't as black as the ET4G's black... if that makes any sense.
Is it just my eyes or my device?
ps I love this thing, not trolling, just trying to figure out if this is just me
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Click to collapse
That is kinda a thing, yes. Though I have seen some very abused (S)AMOLED(+) screens and a couple unlucky new ones where the white isn't white and just sucks. That's what you call a bad screen.
the "O" in SAMOLED+ stands for "organic" and over time these organics do degrade faster than your average LCD. They have a type of compensation built into the circuitry to accommodate for this, but, in the limited amount of time most people have a phone they shouldn't notice it...though there are also bad screens that deteriorate rapidly and some that even burn in.
So, yes, AMOLED technology isn't known for having the whitest whites but they should still be bright white, if not you may either have a bad screen or a fantastic eye....hope for a bad screen cuz you can replace that, but a very good eye for these things may drive you fncking crazy.

samoled screens are like that.... yellowish tint for whites but the blacks are BLACK.

Interesting, thanks for the replys everyone
daneurysm said:
That is kinda a thing, yes. Though I have seen some very abused (S)AMOLED(+) screens and a couple unlucky new ones where the white isn't white and just sucks. That's what you call a bad screen.
the "O" in SAMOLED+ stands for "organic" and over time these organics do degrade faster than your average LCD. They have a type of compensation built into the circuitry to accommodate for this, but, in the limited amount of time most people have a phone they shouldn't notice it...though there are also bad screens that deteriorate rapidly and some that even burn in.
So, yes, AMOLED technology isn't known for having the whitest whites but they should still be bright white, if not you may either have a bad screen or a fantastic eye....hope for a bad screen cuz you can replace that, but a very good eye for these things may drive you fncking crazy.
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I'll see if I can get a good picture comparing it to the Evo. The site I really noticed it on was slashdot. Looks like crap on the epic compared to the evo
Sent from my SPH-D710 using XDA App

R1ptide said:
Interesting, thanks for the replys everyone
I'll see if I can get a good picture comparing it to the Evo. The site I really noticed it on was slashdot. Looks like crap on the epic compared to the evo
Sent from my SPH-D710 using XDA App
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Then something might be wrong. Slashdot is my homepage and I've been going there since...I can't even remember when, over 10 years...12?
Either way, I know that color scheme like the back of my hand. I see it in my sleep. It has been my homepage for 10 years now. I've seen it on everything from a smart phone to projected on the side of my neighbors white house....Slashdot should look normal.
I'd investigate further if I were you.

Just switch it to dyanmic

tomyboombotz said:
Just switch it to dyanmic
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I'm sorry, dynamic what
Sent from my SPH-D710 using XDA App

The whites are fine. I believe your eyes are playing tricks on you. The blacks being so deep give it somewhat a darker tint to the whites, but in truth, it's there.

The whites are good on the SAMOLED+ screens. Just because they a brighter on another screen doesn't mean anything. Personally, super strong white would bug my eyes after a while.

I have a 'Mel Gibson' type "Conspiracy Theory" about this whole issue....
I think that Samsung, though they use exactly the same sourcecode as all the other manufacturers, might simply insert a piece of code that inverts the colors that they want, at a certain time.
For example:
Every other phone on the planet has no problem producing a vibrant "white" color....
Every other phone on the planet has a REAL problem producing a vibrant "black" color.
Samsung basically 'flip-flops" this, and I wonder if it's not just a well-placed piece of "inversion" code....
The results would be incredible blacks, and so-so whites...
Does anyone understand what I'm getting at, and care to comment?
<<This space for rent>>

Sht I thought that I was only one on xda that has yellow tint problem.
Its not just our Epics,tmobile gs2 and nexus prime have same problem.
And no-they are not supposed to be like that!
I looked at epic touch at sprint store and their epic was cool temperature white not like mine which is straight yellowish-orange.
I bought mine on amazon and im on my second return.My second phone was litle better but still orange-yellow compared to one at sprint store or my old Epic 1.
To sum this up:
Whoever has yellow tint on their epic touch or other galaxy s2 variants-they have defective phone.And its gonna get worse because in amoled screens blue colors deteriorate quicker than reast,so if your phone is yellowish now it will be red in a year or two,lol.
Its better to get a phone with bluish tint because overtime it will go away,while yellow will only get worse.

yeah u guys arent kidding... The blacks on this screen are effin black. lol.

Every other phone on the planet has no problem producing a vibrant "white" color....
Every other phone on the planet has a REAL problem producing a vibrant "black" color.
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Yes it is..and samsung gave u a bonus..amazing rgb colors..
Sent from my SPH-D710 using Tapatalk

What's the contrast ratio of our phones? I did a search but all that was said is that "it's high", didn't give exact numbers.
That being said is there a color calibration app, much like one's for tv's & pc monitors, that can be used on our smartphones?

EL TEJANO said:
What's the contrast ratio of our phones? I did a search but all that was said is that "it's high", didn't give exact numbers.
That being said is there a color calibration app, much like one's for tv's & pc monitors, that can be used on our smartphones?
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Click to collapse
Yeah there is an app in market check my other thread for the name.It want fix yellow tint issue but will make it better.

Color temperature calibration?

Does anyone know if there are any working ways to adjust color temperature? I think most methods require a modified surfaceflinger library. My screen is sickeningly bluish green.
Thanks.

ffolkes said:
Does anyone know if there are any working ways to adjust color temperature? I think most methods require a modified surfaceflinger library. My screen is sickeningly bluish green.
Thanks.
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Sounds like a bad screen. I'd take it back. Mine is very balanced. Super saturated but very balanced.
Sent from my SPH-D710 using XDA App

I agree, my first one had a bad screen and a dead pixel right in the center, the screen quality on my new one is better all around and I wasn't even expecting there to be an improvement

Thanks for the suggestions, but the other ones I've seen don't look any better in terms of their greenish-blue color cast. I've read it's typical of AMOLED displays. I just want a way to adjust white balance like CM has.

...and I've discovered the answer. Chainfire3D's Pro version has support for Custom color "nightvision mode". Basically, exactly what I wanted. It works perfectly! Do yourself a favor and get this and drop your green and blue levels down a tiny bit.

You just saved me a two hour drive to get a new phone. Great find.

[Q] Oh the blue hue, what to do?

I am not an SGS2 owner as of yet but in all likelihood I am still anticipating that I will be by the end of next week as that's when I am eligible to upgrade with T-Mo.
I was going back and forth between this one and the HTC Amaze but the battery life horror stories and overheating issues have pretty much scared me off from that device.
I've tested close to a half-dozen SGS2 handsets at various stores and each and every time I've been bugged and annoyed by a bluish hue that is very apparent on what should be white backgrounds. Comparing the culprit against my current phone or another model at the store really confirmed it. In every case whites were simply not white...usually very slight blue and in one instance, almost like a greyish blue. I really want to like the SGS2 and overall I do (not crazy about Touchwiz so much and the resolution is a bit of a knocker too but I found a smaller system font on the market that I tested and downloaded on one handset and it did help a little).
I found an app in the Android Market called Color Filter Service (just search on those exact words and it comes right up). Has anyone tried this or have any comments on it? This looks like it could do the trick. I know it's only .99 but if it there are any opinions I'd like to hear them. There's only 2 reviews on the market and they aren't really all that detailed or helpful. If this app works on the SGS2 I think I would really be a lot more sound and comfortable in my decision to go with the SGS2.
Finally, I think I saw that the AT&T and World version of this phone has a color mode setting, something along the lines of standard, dynamic, etc. I don't know if this has anything to do with how hot or cool the color temperature runs but I am curious if this setting might come to the T989.

Red Color Problem!?

Hi, I have a Problem with Red Colour on my Gnex.
When I use Vodoo colour test patterns, When I switch to Red I have stripes int the red field. This only happens with Red color.
I never noticed that before, can be that this was there since i have this device (since release) or it is there since a few weeks.
Can somebody check if this is normal or if my device has a problem with display!?
I'm on Jelly bean already tried different kernels, also with color improvement. seems to be also with stock!
When I make a screenshot, and have a look on it on a normal PC screen, then the Red color is completely ok.
So iassume that something with my Gnex screen is wrong. Would be nice If somebody can give me feedback!

Are your stripes horizon all over the screen? Yes I have this too. They began at the top and spread down over the first month of usage. I think its normal for this phone.

---- moved, wrong forum, sorry------

Yes, they are horizon. But red is the only color where this happens, all other colors are without stripes.
Looking a little stupid in some apps licke kicker for example!

Anyone else experiencing theese problems?
I only would liekt to figure out if this is normal or if it is a defect!

I also have this issue, it happens in all colors but more obvious in red.its annoying as **** when you start noticing it.when i record videos its really obvious in dim light. Im just glad im not the only one.:/
★Sent from my NexusPrime★

I have also noticed this sh** , but my brother nexus does not have the same problem
any one knows why ?

My guess it's a side effect of the pentile matrix. AMOLED screens have a significantly lower life span than your traditional LCD screen and does degrade with time. This is also noticed in how the color balance gets very off with time (and does pretty dramatic changes over just the span of 1 month!), usually colors meant to be neutral looks very ugly green-tinted.
As for my screen? I noticed it in all the primary colors. Red was for sure had most visible "banding" but when I looked closely I noticed it as well in the green and blue as well (green being the least visible).
My Gnex is a year and a few months old as I've had it since February last year.

same thing happened to my screen in about 1_2 weeks when I got my phone. All colors were affected, but red is the most obvious. Pentile is ****
Sent from my Galaxy Nexus

But why my brother's nexus is still ok ? although he bought his nexus before me ?
So are you saying that any pentile screen would face this ?

up

IIEtCII said:
But why my brother's nexus is still ok ? although he bought his nexus before me ?
So are you saying that any pentile screen would face this ?
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Do you really need someone to point out that not all screens are made equal? If it drives you to distraction, root and install Trinity Kernel or Franco's Kernel (which has Trinity's Contrast) they have a plethora of colour options.
I run a very icy-white colour on my Nexus.

My screen has never looked this awesome...

So, the other day I purchased a Datacolor Spyder 4 Pro screen calibrator. Being a photographer I want all my (primary) displays to look as natural and true to what my eye sees as possible.
So I decided to try calibrating my Gnex screen. I don't know any good way of doing this so I had to improvise, what I did is I first took screenshots of the entire calibration process and came to the conclusion that it simply shows 5 images: one solid white, black, red, green and blue image and measures it to define the accuracy of the uncalibrated screen. Then having told the calibration software that the screen has built in RGB sliders (the gnex doesn't I know, but I ticked the option anyway, you'll understand soon why) it then gives me a screen where it measures from a solid white image how much bias there is in either of the channels (red, green and blue) and gives a clear diagram overview, the objective is to adjust the RGB sliders of the monitor to make the 3 bars align (thus having no bias/tint in either channel for a natural reproduction). What I did here is that I used the color control feature available in various custom kernels (I'm using franco) and adjusted the color multipliers until' I my calibrator reported it being even and natural. I also used the RGB Gamma for some minor fine tuning.
I returned to the home screen and WOW, it's looks better than ever, grays are perfectly natural with NO GREENISH, CYAN OR PURPLE TINTS anywhere! Whites aren't perfect, leaning more toward a bright light gray, but worth noting I'm having only 31% screen brightness and I'm not sure if AMOLED can achieve a pure bright white image without a ton of cyan bias.
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Tl;dr
Long story short, I got an hardware screen calibrator and used it to assist me get the most natural values with the color control in franco's kernel and it just pure amazing with none of the tints that the gnex is known for having.
My final values:
NOTE: These values may or may not look good for you, every AMOLED screen is different and needs different settings, these are simply the settings that worked for me, what's best for your device might be completely different!
Multipliers: 233 175 210
RGB Gamma: 1 0 1
Trinity contrast: 0
OMAP gamma: 1.0/disabled

Are the multipliers in order as RGB? Because these settings just make my screen look orangey

First thing, thank you for post:good:, i had looked for somebody to do a true calibration ever since i bought my gnex, having been spoiled before by my nexus s slcd screen, which was an excellent batch, so moving to the SAMOLED HD, for me, wasn't as great as i had hoped.
Still even after trying all the presets and fine tuning it still is slightly off.. (annoying thing with these screens not being all the same and being so different on quality, so you can't simply just input the color values and get the same result).
Anyway i like your numbers, they look pretty god on my screen.
Off topic: I'm probably wrong, but i think read somewhere that going over 200 on the color multipliers was supposed to make the screen more susceptible to burn in?

nitsua98 said:
Are the multipliers in order as RGB? Because these settings just make my screen look orangey
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Thanks for the reply. They should be in order indeed. Note that every display is different so it may not be what's best for your individual device. Additionally, AMOLED screens I believe is said to wear/fade quite quickly compared to LCD with use and also due to the way the actual panel works in our screens each color channel will fade with different pace, effectively leading to unbalanced colors based on what you view on it; For example if you view a lot of red colors, the reds will start fading and thus everything will look a tad cyan-tinted. Finally there may be a difference in the kernel you use and the version of that kernel.
Simply put, unfortunately it's not guaranteed that what looks best for everyone else as each screen is different.
Oh, another thing I noticed; Screen brightness actually affects the color balance pretty largely. Higher brightness means less greens and more reds/blues.
VirgilO said:
First thing, thank you for post:good:, i had looked for somebody to do a true calibration ever since i bought my gnex, having been spoiled before by my nexus s slcd screen, which was an excellent batch, so moving to the SAMOLED HD, for me, wasn't as great as i had hoped.
Still even after trying all the presets and fine tuning it still is slightly off.. (annoying thing with these screens not being all the same and being so different on quality, so you can't simply just input the color values and get the same result).
Anyway i like your numbers, they look pretty god on my screen.
Off topic: I'm probably wrong, but i think read somewhere that going over 200 on the color multipliers was supposed to make the screen more susceptible to burn in?
Click to expand...
Click to collapse
And thanks to you for your reply. I actually believe I've heard someone that had used hardware to measure up the best settings for a natural 6500K color balance, but as I replied above, each screen is different and thus they were slightly too much on the blue/cyan end for me. To be honest, most settings I've tried that others have claimed to look great have always been too much green or too much blue. I've tried to adjust after my own eyes and gotten pretty close to what I believe to be good colors but always there is some kind of flaw, so I'm quite surprised to be honest I was able to get such a good overall result.
As for the color multipliers, I've heard it too but I have never seen anyone confirm it, so I'd call it off as a rumor. The burn-ins I've seen using values around 150-200 previously only apply to bright contrast colors and fades away within 2-3 seconds at most and 31% screen brightness is rather low I'd say.
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On another note.. I just want to add that this isn't necessarily a full calibration but just an attempt to reach the most balanced color values. When it comes to gamma and contrast however I'm not sure it's really possible to mimic that of an LCD screen due to the way AMOLED handles blacks and produces very vibrant colors.

Timmyfoxeh said:
Thanks for the reply. They should be in order indeed. Note that every display is different so it may not be what's best for your individual device. Additionally, AMOLED screens I believe is said to wear/fade quite quickly compared to LCD with use and also due to the way the actual panel works in our screens each color channel will fade with different pace, effectively leading to unbalanced colors based on what you view on it; For example if you view a lot of red colors, the reds will start fading and thus everything will look a tad cyan-tinted. Finally there may be a difference in the kernel you use and the version of that kernel.
Simply put, unfortunately it's not guaranteed that what looks best for everyone else as each screen is different.
Oh, another thing I noticed; Screen brightness actually affects the color balance pretty largely. Higher brightness means less greens and more reds/blues.
And thanks to you for your reply. I actually believe I've heard someone that had used hardware to measure up the best settings for a natural 6500K color balance, but as I replied above, each screen is different and thus they were slightly too much on the blue/cyan end for me. To be honest, most settings I've tried that others have claimed to look great have always been too much green or too much blue. I've tried to adjust after my own eyes and gotten pretty close to what I believe to be good colors but always there is some kind of flaw, so I'm quite surprised to be honest I was able to get such a good overall result.
As for the color multipliers, I've heard it too but I have never seen anyone confirm it, so I'd call it off as a rumor. The burn-ins I've seen using values around 150-200 previously only apply to bright contrast colors and fades away within 2-3 seconds at most and 31% screen brightness is rather low I'd say.
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On another note.. I just want to add that this isn't necessarily a full calibration but just an attempt to reach the most balanced color values. When it comes to gamma and contrast however I'm not sure it's really possible to mimic that of an LCD screen due to the way AMOLED handles blacks and produces very vibrant colors.
Click to expand...
Click to collapse
Actually deterioration is a problem with normal AMOLED screens. Samsung uses PenTile configuration to mitigate that in the SAMOLED and SAMOLED Plus variants. More info in the following interview with a Samsung engineer:
http://www.mobileburn.com/19548/new...ed-displays-last-longer-thats-why-we-use-them

I put in these values using the Trickster app and my screen looked absolutely rubbish. There is no option to enable/disable Omap gamma in trickster, could that be the reason for the bad colors?

Screenshot please
Sent from my Galaxy Nexus using xda premium

Justinhopaolo said:
Screenshot please
Sent from my Galaxy Nexus using xda premium
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Face meet palm...
Why would the settings on his device be shown in a screen shot that you're viewing on yours?

its looks like cyan effect for photo on my screen..:/

063_XOBX said:
Face meet palm...
Why would the settings on his device be shown in a screen shot that you're viewing on yours?
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Ummm.. Before and after?? Captain perfect
Sent from my Galaxy Nexus using xda premium

This works very well on my phone, but I change the omap gamma to 6
Thank you again :thumbup:
---------- Post added at 04:05 AM ---------- Previous post was at 03:51 AM ----------
Justinhopaolo said:
Ummm.. Before and after?? Captain perfect
Sent from my Galaxy Nexus using xda premium
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He's right, smartass, the screen shot is just the source of color, no matter how you calibrate your screen, every screen shot looks the same on other devices. We can only notice with real eyes contact.

Justinhopaolo said:
Ummm.. Before and after?? Captain perfect
Sent from my Galaxy Nexus using xda premium
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That makes as much sense as taking screenshots of different brightness levels.

Justinhopaolo said:
Ummm.. Before and after?? Captain perfect
Sent from my Galaxy Nexus using xda premium
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You must be a genius. Never heard anyone call somebody "Captain perfect" either. Pretty crappy insult.
Glad to see some people have enough sense to realize screenshots are software rendered though.

063_XOBX said:
Face meet palm...
Why would the settings on his device be shown in a screen shot that you're viewing on yours?
Click to expand...
Click to collapse
You knew this was going to happen lol.
Sent from my Galaxy Nexus using Tapatalk 2

AbhishekS said:
I put in these values using the Trickster app and my screen looked absolutely rubbish. There is no option to enable/disable Omap gamma in trickster, could that be the reason for the bad colors?
Click to expand...
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Every screen is different, what looks good for me might look rubbish for you unfortunately :/
Also because someone asked for a before/after...
Now this will be highly unscientific and hard to reproduce but here's a before/after example (clicky for larger image):
Also advised you look at it with a good desktop monitor, and bear in mind that cameras are not perfect in any way so even if the camera settings used were identical and white balance set to match as closely as possible, it may not look to you as significant in terms of differences than it is to my eye. Nonetheless I can certainly see a difference especially in the gray and white tones.
The before example is not the stock kernel but simply the reference settings of all multipliers set to 200 and RGB gamma all set to 0. I believe this should be fairly similar to what stock kernel shows.

Still looks orangeish to me so I lowered red down to 220. But thanks anyways. I always love testing these.

A screenshot won't show screen adjustments...
Justinhopaolo said:
Ummm.. Before and after?? Captain perfect
Sent from my Galaxy Nexus using xda premium
Click to expand...
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Sent from my Galaxy Nexus using Tapatalk HD

You had a green tint before u changed it. I can that in the Google Search bar.
And what's funny is the color u recommended are extremely similar to mine lol.
*Multiplier*
Red: 235
Green: 170
Blue:206
*RGB Gamma*
Red: 4
Green: 0
Blue: 2
Trinity: 0
Omap:1
But yeah I had a very greenish tint in my screen. Made my keyboard look brown before I rooted. =|
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If I have helped you.... hit that sexy thanks button. ^_^

Justinhopaolo said:
Screenshot please
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Amazing. Just amazing. Can't believe we still have people who say things like this.
Sent from my Galaxy Nexus using xda app-developers app

after looks better imo