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[Q] Screen pinkness (is mine normal?)

Hi all,
Picked up my One S on Monday and, so far, in almost every way it's my "perfect" phone - great feel, weight, crazy slick... just lovely.
However (and why is there ALWAYS an Achilles heel?), I'm really not happy about the screen. Ok, it's pentile, but so was my Desire (AMOLED one) and I never had a single problem with that. It's just this one seems so, well, pink! Not just in white balance, but there seems to be too much red everywhere - e.g. text on grey in Tweetdeck has crazy amounts of red fringing (especially noticeable on the yellow too), and the over saturated colours are almost too much (though not much more than my Desire, to be honest).
(Quick comparison of the screen temps attached)
I mean, seriously, that's not normal, right?
Am I the only person who seems to notice red / pink outlines on everything, am I the only person bothered by it, or am I just unlucky with this phone?
I went to Carphone to swap it, but they wouldn't because their manager was out and because I traded down from the X on Monday (flickering screen nightmare), so I had a play on their display model and I convinced myself the screen on that one was better! But, I'd love a second opinion!
Cheers!

Oh that's really pink! Will check mine when it finishes the first round charging.

I would say this isn't normal. On amoled Displays white areas appear a bit blueish or grey. But this red/pink looks unnormal
Sent from my HTC One S using xda premium

no, this doesn't look normal. But the thin red and green outlines are caused by the pentile-matrix, this is normal.

Just download Screen Adjuster and increase blue and green values a bit and your red screen will be gone

That's a v. useful app! It's definitely taken the edge off (green & blue at +5), but I'll still pursue a replacement as the contrast has taken a bit of a hit now.
(I'm such a perfectionist!)

Fondue said:
Hi all,
Picked up my One S on Monday and, so far, in almost every way it's my "perfect" phone - great feel, weight, crazy slick... just lovely.
However (and why is there ALWAYS an Achilles heel?), I'm really not happy about the screen. Ok, it's pentile, but so was my Desire (AMOLED one) and I never had a single problem with that. It's just this one seems so, well, pink! Not just in white balance, but there seems to be too much red everywhere - e.g. text on grey in Tweetdeck has crazy amounts of red fringing (especially noticeable on the yellow too), and the over saturated colours are almost too much (though not much more than my Desire, to be honest).
(Quick comparison of the screen temps attached)
I mean, seriously, that's not normal, right?
Am I the only person who seems to notice red / pink outlines on everything, am I the only person bothered by it, or am I just unlucky with this phone?
I went to Carphone to swap it, but they wouldn't because their manager was out and because I traded down from the X on Monday (flickering screen nightmare), so I had a play on their display model and I convinced myself the screen on that one was better! But, I'd love a second opinion!
Cheers!
Click to expand...
Click to collapse
I see an difference in the white background yes... but other that that? Nope... it's just you...

Thiesen said:
I see an difference in the white background yes... but other that that? Nope... it's just you...
Click to expand...
Click to collapse
Well, when I say "see" I meant on their own One S rather than on my screenshot.

I sometimes notice it being a bit pink when the brightness is set low, have you tired using auto brightness or putting it a bit higher?

djpc said:
I sometimes notice it being a bit pink when the brightness is set low, have you tired using auto brightness or putting it a bit higher?
Click to expand...
Click to collapse
Same here, it is pinkish only on low brightness.
Sent from my HTC One S using xda premium

encho said:
Same here, it is pinkish only on low brightness.
Sent from my HTC One S using xda premium
Click to expand...
Click to collapse
Hmm. Other than at 100% brightness, it still seems pinkish. I finally get to persuade CPW to give me a replacement tomorrow...

That's looking odd definitely. Let us know if the replacement is better.
I haven't noticed any issue on mine
sent using HTC1S

mine screen is definitely on the warm side of things (meaning the whites are yellow'ish). seeing how One X has a yellow tint issue (different screen manufacturers involved it seems) and you're playing a screen lottery i wonder if One S is the same. slightly warmer screens is not an issue per se but a strong yellow tint definitely effects the overall brightness and sharpness. i would love to compare different units in store to see if One S with cooler screens actually exist.
the pink tint is a straight up defect, however.

Fondue said:
Hmm. Other than at 100% brightness, it still seems pinkish. I finally get to persuade CPW to give me a replacement tomorrow...
Click to expand...
Click to collapse
This probably won't help you. It won't hurt I guess, but this is something that can be worked out with a software solution. The SGS had something called Voodoo Colors, and I'm assuming that at some point that'll make it to the One S, as it's an AMOLED device as well. The colors changing on low brightness is one of the characteristics of an AMOLED screen.
As a poster above recommended, install that tool and set adjust the values for now. In due time, this'll be worked out. HTC just didnt do a great job with their color profile.

[Q] Pink tint in pictures

Anyone else having an issue with pink tint in the default camera app? If I knock the saturation back one level it seems to be fine. But set on default saturation it makes anything with even a hint of red in certain kinds of light turn bright pink.

Try this
akaosmith said:
Anyone else having an issue with pink tint in the default camera app? If I knock the saturation back one level it seems to be fine. But set on default saturation it makes anything with even a hint of red in certain kinds of light turn bright pink.
Click to expand...
Click to collapse
Ok try this turn camera on focus on something white to see if u have pink spot . If so wave you hand slowly in front of the camera and let the camera focus on your hand and repeat until pink is gone

Gave that a shot. It appeared to help while I had the camera focused on the page. Using the camera again though and on default saturation it's still coming out pink. I'm wondering if this is a software issue or a hardware one. Have to decide by the 28th if I should go back and exchange this phone for another.

From my experience every HTC unit I have used does this in low light situations . But you can try to exchange and see if it helps.

tyshemi said:
From my experience every HTC unit I have used does this in low light situations . But you can try to exchange and see if it helps.
Click to expand...
Click to collapse
That was what I was wondering. If this was an issue with my unit or if other people were having the same experience. When the lighting is good the tint does go away, for now keeping the saturation down one level seems to do the trick.

I have the same problem taking pictures oudside, with bright lighting. I take pictures of my chickens, and their heads look magenta, not red. I just lowered the saturation and took a test photo inside, and it seemed to help a bit. I have only had the phone for a week, and with the exception of the magenta chickens, I like the phone.

Mine does it too. My hunch is that its not a defect, and its never actually occurred to me that it might be. So I haven't compared with other HOX's to see if its a defect or not. I seems like its intentionally oversaturated by HTC to make the colors look more vivid. It usually looks ok. But sometimes it makes people's faces look like they have a ton of pink blush on their faces. I don't personally think its a low light issue. Seems to sometimes appear in sunlight too. But bright sunlight tends to wash out colors, so the pinks and reds are often not there to begin with (especially on faces), so there is nothing to oversaturate.
I remember in the sample photos taken with the phone and released by HTC before the phone was even released, and thinking they all looked really artificially oversaturated.

[fix]fix for smearing issue [updated 19/7/2013]

Update: 6/5/2013
* replaced method 1 with new method
Update: 19/7/2013
* added new hardware level fix for 9500 users
As of now we all know that almost all s4 units is suffering from smearing issue. After fiddling with some apps here and there I found a temporary solution , this should be handy until Samsung fixes it.
I suggest two method for this issue, Method 1 adjusts the rgb values of the screen(overlays) .Method 2 adjusts the contrast levels of the screen.
With both the above mentioned methods the black levels are not pitch black but will be on par with the blacks of s3 or anyother amoled screens. I prefer method 1, if you guys face any problems with method 1 then you can try method 2.
Method 1:
1.install screen adjuster app from market.
2.Set the values of green, blue, red between 5 to10(I prefer 5) and turn on the filter
3.job done
Method 2:
1.install screen adjuster app from market.
2.change the contrast level from -0 to -10(you can go upto -20 depending on how far your eyes can balance between smearing and pitch black)
3.turn on the adjuster.
4.job done
Method 3: (HARDWARE LEVEL FIX ONLY FOR 9500 USERS)
This method fixes the smearing at hardware level and changes contrast level of black backgrounds without touching other colors and dosent drains battery like screen adjuster. Thankst to @AndreiLux and @Slimmer77 for their contribution on screen calibration for 9500
Original post by @AndreiLux
AndreiLux said:
One is software and causes battery drain and applies to all colours if you want it or not, and the other is hardware, costs nothing and targets only black.
Click to expand...
Click to collapse
AndreiLux said:
I doubt he does.
echo 4 > /sys/class/misc/mdnie/hook_control/scr_black_red
echo 4 > /sys/class/misc/mdnie/hook_control/scr_black_green
echo 4 > /sys/class/misc/mdnie/hook_control/scr_black_blue
Will give a 1.56% grey on blacks and removes all smearing. You need to set digital brightness reduction to 0 though since I didn't plan for this use-case and it negates the above "fix".
Click to expand...
Click to collapse
1.Install a custom kernel that supports screen calibration.
2.goto screen tab
*enable register hook
*set digital brightness reduction to 0.
3.Flash the attached zip file
4.job done
Users who hate the non black background(especially it looks poor when used along with smearing fix) introduced by samsung on newer roms can flash teh blac background mod attached in this post
Note: Running screen adjuster on background will disable the "install" button while installing apps manually, so disable screen adjuster before you start installing something and resume using screen filter after the installation is over
Sent from my GT-I9500 using Tapatalk 2

Thanks!
Do you mean the app Filter Your Screen?

bala_gamer said:
1.install screen filter app from market.
Click to expand...
Click to collapse
Thanks for the great information....
You could however also post the URL og full name of the correct app as there is multible alternatives to choose from..

Hi.
How exactly the name this aplication.
In market is over dozen aplications.
Regards

Oops it's screen adjuster guys.
Added link to op
Sent from my GT-I9500 using Tapatalk 2

bala_gamer said:
Oops it's screen adjuster guys.
Added link to op
Click to expand...
Click to collapse
n00b....
HAHHAHAH....
THANK YOU <3

How do you mean by smearing?
Sent from my GT-I9505 using xda app-developers app

Thid is screen smearing my video and the fix
http://youtu.be/qgxZfT0yXyY
Sent from my GT-I9505 using xda premium

Does this mean it is software issue Samsung will fix? I have the pink tint on a solid black background I assume this is what method 1 fixes?
Sent from my XT890 using xda app-developers app

topcat07 said:
Does this mean it is software issue Samsung will fix? I have the pink tint on a solid black background I assume this is what method 1 fixes?
Sent from my XT890 using xda app-developers app
Click to expand...
Click to collapse
Personally, if you can fix or at least hide the issue with the above then at the very worst Samsung may change some settings in later roms to the same effect. I am hoping that it is actually a driver issue and a proper fix will come along....
This is an assumption but as the above works then I cannot see it being a hardware issue but then I am no expert.....

Won't this affect battery life? It seems to negate the power saving effect of AMOLED. I believe the smearing comes from the pixels going from off (black) to on (grey) and that switch time not happening fast enough. This app and workaround does definitely work, but it seems that it works because it's changing everything from black to veryyy very dark grey (still looks pretty black to me) however that means that the pixels aren't off if they're displaying grey instead of black right?

ok thx balagamer but its only patch for now hope samsung will fix it as i dont wanna blacks like on SGS3 and i really hope sammys fix wont be the same and they will steal the true black from us...that why i bought amoled right for the blacks

play2lose said:
Won't this affect battery life? It seems to negate the power saving effect of AMOLED. I believe the smearing comes from the pixels going from off (black) to on (grey) and that switch time not happening fast enough. This app and workaround does definitely work, but it seems that it works because it's changing everything from black to veryyy very dark grey (still looks pretty black to me) however that means that the pixels aren't off if they're displaying grey instead of black right?
Click to expand...
Click to collapse
That's how the black looks on s3. Now I can understand why the blacks are pitch black in s4 compared to other galaxies to some extent.
Sent from my GT-I9500 using Tapatalk 2

I hate my eyes, because I look so good, but fortunately there is a fix for it halfway. Now I longer scroll ever to go hahaha :good: many thanks!

I have pink tinge and method one just makes a screen too green but thanks anyway!
Sent from my XT890 using xda app-developers app

play2lose said:
Won't this affect battery life? It seems to negate the power saving effect of AMOLED. I believe the smearing comes from the pixels going from off (black) to on (grey) and that switch time not happening fast enough. This app and workaround does definitely work, but it seems that it works because it's changing everything from black to veryyy very dark grey (still looks pretty black to me) however that means that the pixels aren't off if they're displaying grey instead of black right?
Click to expand...
Click to collapse
I believe this is indeed the case. Samsung could fix that by maintaining the pixels lit at the lowest power level, like with the previous Galaxy phones. I'm not sure if it's worth it though. Hopefully there'll be some even better work-around.

play2lose said:
Won't this affect battery life? It seems to negate the power saving effect of AMOLED. I believe the smearing comes from the pixels going from off (black) to on (grey) and that switch time not happening fast enough. This app and workaround does definitely work, but it seems that it works because it's changing everything from black to veryyy very dark grey (still looks pretty black to me) however that means that the pixels aren't off if they're displaying grey instead of black right?
Click to expand...
Click to collapse
thats how samsung displayed the blacks in their past galaxy devices. With s4 the black pixels are completely turned off which is not the case with previous galaxy devices. hence even if samsung rolls out a fix they will simply make something similar to what we acheived with "screen adjuster". and dont forget you can still tweak the values in screen adjuster and find the best balance between black and smearing effect, the value "5" mentioned is suitable for me , it may or may not suit others.

so thay fu*ked up display also on previous phones and hide it behind the worse blacks really bravo samsung. I have my SGS4 from yesterday and have to say I see it clearly, the edges of grey lines are getting to purple colour. But I dont care because I can see it only if Im focusing on it. But for normal use you focus on text and what are you looking for and not to some grey lines right? So, Im rather happy with my super deep blacks...maybe some good AOSP/AOKP/Cyanogen will replace TW interface...

kultus said:
so thay fu*ked up display also on previous phones and hide it behind the worse blacks really bravo samsung. I have my SGS4 from yesterday and have to say I see it clearly, the edges of grey lines are getting to purple colour. But I dont care because I can see it only if Im focusing on it. But for normal use you focus on text and what are you looking for and not to some grey lines right? So, Im rather happy with my super deep blacks...maybe some good AOSP/AOKP/Cyanogen will replace TW interface...
Click to expand...
Click to collapse
It's not ****ed up but that's the way you can get the best out of amoled, lcd don't even have these features, even with this fix the black levels are way better than any other lcd screen in this world
Sent from my GT-I9500 using Tapatalk 2

I'm not impressed by the screen at all, dead pixels, really bad ghosting and the screen turns pink at the bottom.
HTC One screen at least only had dead pixels.

Galaxy S IV - Screen, display, auto brightness, etc explained

As it seems there are a few threads on auto brightness and color issues, i figure i should do the best i can to explain how it works on the S4, and mobiles in general. I work in Television/Film and have been shooting for almost a decade.
ANY QUESTIONS, feel free to PM me, i'll probably ask for very specific photo's (ISO/WB and other data) so i can help you in a professional manner, and i'll try to reply within 6-8 hours. No one should live with a bum screen!
To fully understand what im trying to express, load the attached image onto your phone, and on a bright sunny afternoon, print out the attached image on a small piece of decent photo paper, grab your phone, and find a room in your house that has only fluorescent lights and close any windows or shutters.
Look at the photo in the sunlight; note the colors. Now go inside to the fluorescent dark room, note the change in what the colors look like, and that white is still pretty white (thats your brain), then turn your camera flashlight on (LED), and note the changes in color again (some reds may look purplish or greens bluish), but white still looks kinda white (should look very light blue). Now repeat and look at the print out versus the same image on your phone screen; it should match best under 6500k lighting, but still be off (thats a printed image vs monitor thing though). Also depends on your printer ink type (dye/pigment), color space, etc etc etc. Your eyes take raw data in, but your brain does the magic, and says 'nope, thats white', so you perceive it as 'white' or 'white enough' and you 'know' it is meant to 'represent' white.
Hardware - This includes an ambient light sensor. The way these work is similar to metering systems in cameras; they measure the amount of light hitting a photodiode. Even in high end (DSLR) cameras, sometimes the light meters are junk. On cell phones, they are typically pretty crappy. The iPhone 5's have excellent ALS (ambient light sensors) and they ramp up/down smoothly; much better than any other device i've used.
The way the ALS works in most devices is simple; there are several photodiodes, each tuned for a specific spectrum of light. Say two for 3200k, two for 6500k, two for whatever else, etc, and they basically average the reading, apply a curve, and adjust the screen appropriately. They do NOT accurately measure color temperature very well, and 'see' brightness only in limited spectrums, meaning their idea of what 'bright' and 'dim' is may be vastly different from the human eyes' perceived 'bright' or 'dim'. Also, the 'curves' applied don't match up that well with how the human eye perceives brightness; its really amazing we can fake it as close as we can, really, but most of the magic lies in your brain.
Lighting - this is kind of tricky; and i don't feel like getting into it too deeply, but what you perceive as 'white' is mostly dependent on your brain; not your eyes or the lights around you. Think about reading a book (a real book) inside a library under fluorescent lights; the pages are white, even though the color temperature might be 5000k or 6500k. Now that same book outside; thats 5800k. Now under some old incandescent lights; that might be 2800k. Yet you know it SHOULD be white. Thats your brain. And thats reflected light; its based on the ambient color temperature around you; so reflected light 'looks' white or blue or whatever.
Your phone screen (galaxy S IV) is basically white balanced at 6600k , so it will appear most white when around lighting around 6500k, which is on the bluer side of daylight/cloudy and indoors.
Screen Mode - The Galaxy S IV has a feature that allows it to dynamically change based on the ALS, or can be overridden by the user, which mostly affects color gamut, and either amps up contrast and saturation while shifting hues slightly, or flattens them to a more realistic (usually most people prefer high saturation/high contrast images) image.
Sampling frequency - i have no idea what the ALS sensor samples at, or any definitive specs on the exact sensor and how it interacts with auto brightness, its priority, etc (yet, ive emailed Samsung and i wouldn't mind coming up with a simple app to adjust this if i can figure out the sensor specs and their software). But certain lights (fluorescent mostly) flicker at either 50hz or 60hz depending on their AC current, which may, at times, interfere or give bad readings to the ALS depending on the ALS sensor reading timings (again i do not know exactly what those values are, i suspect they are long as my S III and S IV typically react about a half-second behind lighting changes).
DETERMINING IF YOU HAVE A BAD DISPLAY
All together, it works pretty darn good, if a bit slowly, but there seems to be a lot of confusion and people wondering if their screen is bad. The BEST and EASIEST way is to go to any cell store or mall, and compare YOUR screen and the SAME image to another S IV, with the same settings. The best settings for this are to turn power saving OFF, turn off ALL power saving apps, turn auto brightness OFF, turn brightness up ALL THE WAY, go to 'settings', 'display', 'screen mode', and change the setting to 'movie'. Compare several IDENTICAL images or pages. Then change the 'screen mode' to 'standard' and compare the same images.
While doing so, be sure to check out images such as the one i provided and make sure the colors match, grays are grays or at least the same slight caste of pink/green/etc, and while doing so, TILT THE SCREENS at various angles together (level surface, side by side, tilt to 45 degrees at the same time on all 4 axes), and look for discoloration or bleeding; if you see big differences between two or three other phones and yours, you got a bum screen. I haven't seen a 'bad' one yet, and i made the poor AT&T guy open up five of them and let me play with them (AMOLED also has jet black splotches with full blacks in a fully black room; i wanted the screen with the least noticeable splotches).

Thanks for this. Question though. When I pull my keyboard up to type on something or if I'm in a YouTube video and I tap the screen to bring up the progress bar the color shifts dramatically. I've tried many settings and it always does this. Also tried it on another s4 multiple ones did the same thing...
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2

Just hoping for a fix for it
The white balance can actually be calibrated by changing the calibration levels of the LEDs sitting under the screen
Lets hope for the best

jetlitheone said:
Thanks for this. Question though. When I pull my keyboard up to type on something or if I'm in a YouTube video and I tap the screen to bring up the progress bar the color shifts dramatically. I've tried many settings and it always does this. Also tried it on another s4 multiple ones did the same thing...
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
Click to expand...
Click to collapse
ok, do me a favor, I would prefer if you had either a prosumer camera you could use, or better yet a DSLR you could borrow that i could guide you through how to take two shots of the differences with all the important variables locked down so i can figure it out for you. I believe the screenshot feature ignores the 'Screen Mode' settings, as it should (you wouldnt want a screen mode dictating recording colorimetry options), so it does require real photos to figure out.
Have you changed the standard 'Screen Mode' setting or left it at 'Adapt Display' or 'Dynamic'? Those will keep changing it; Professional photo and movie are more flat, but they do not change. Again disable power saving mode, power saving apps, turn off auto brightness, (in this case set brightness to where you want it) and check it out again; if it doesnt change colors, (which it should not), you have no issues; its a normal 'feature' of the device. The idea is to limit all variables. Try that and PM me the results. If the colors no longer shift, the issue was 'adapt display' or 'dynamic' Screen Modes. Auto brightness/powersaving mode/power saving apps should only affect brightness; we are only disabling them to limit perceived changes.
To try to trouble shoot this, change screen mode to a static setting like 'professional photo' or 'movie' in Screen Mode and turn off auto brightness, turn off power saving and turn off all power/battery saving apps/etc, bring up a Youtube video and play it, then bring up your keyboard and see if the color shifts (it shouldnt if you have changed Screen Mode to Pro Photo/Movie and disabled powersave/all battery apps/auto brightness). Then let me know if that fixes it via PM.
rapaholic999 said:
Just hoping for a fix for it
The white balance can actually be calibrated by changing the calibration levels of the LEDs sitting under the screen
Lets hope for the best
Click to expand...
Click to collapse
problem is most calibration settings/programs and methods i know of are non-pentile and are mostly software fixes for what ive used; AMOLED is different PenTile (RGBG) than what i tried to fix before which was Motorola Atrix 4G PenTile (RGBW, red green blue white), CCFL LCD is way different (more what im used to, as well as LED LCD and even IPS is easier as it is still RGB), and all the curves software etc are all proprietary to manufacturers. Granted controlling just the R/G/B/G LED's would help, but getting the curve right and correcting might take longer than the Galaxy S V arrival. I spent months calibrating all my gear; most of it is 2-3 years old, and at least 6-12 months old before i get it all settled and can rely on it for a given job. Usually i rely on calibrated displays, knowing my own color limitations, RGB histograms, vector scopes, etc (i have a very slight red/green color weakness, but extremely sharp vision and i know how to work around my limitations).
I actually emailed Samsung about this for as much information as i could get (not much so far but im digging). I have a friend playing with LUT curves on his S IV and he says its a close second to the iPhone screens for AdobeRGB in 'movie' mode, which i happen to agree with; its pretty flat, but the contrast on greens is still high, which again is a PenTile RGBG specific issue; we are both vets of backlit RGB panels. My friend also works with the same company i consult/represent; it took him almost three months to properly calibrate LUT curves between a single sensor and a simple 480P CCFL LCD display, and that was with full manufacturer support. Colorimetry is a science.

jetlitheone said:
When I pull my keyboard up to type on something or if I'm in a YouTube video and I tap the screen to bring up the progress bar the color shifts dramatically. I've tried many settings and it always does this.
Click to expand...
Click to collapse
Same here. Thanks for the write up but I'm seeing the same thing.
I dim the display with the Screen Filter app for reading in bed and whenever my keyboard pops up (SwiftKey, TouchPal or stock) the entire screen gets a green cast. Under these conditions it is very dramatic.
I use manual brightness and turned off the Autoadjust Screen Tone setting
Some other apps exhibit a fluctuation in color cast when I put my finger near the screen which is double weird. :-\
-darren
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2

Yes it's weird I don't know what's happening. Anyways I'd toy turn the brightness up past half way the color cast goes away. .. Not sure what it is
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2

If you go to a settings menu and scroll up and down fast, my phone gets a purple tint and leaves like a shadow of the words behind... Kinda annoying.. Anyone else notice this?
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2

Yes smearing
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2

MrPlNK said:
If you go to a settings menu and scroll up and down fast, my phone gets a purple tint and leaves like a shadow of the words behind... Kinda annoying.. Anyone else notice this?
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
Click to expand...
Click to collapse
thats because AMOLED usually have a slower response time, upwards of 20ms
jetlitheone said:
Yes smearing
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
Click to expand...
Click to collapse
yep, i have some old LG CCFL LCD monitors with a claimed 2ms (more like 6-10ms) response time from 2006; they were about $300 each back then. i also have a new IPS with 30ms response time; it is annoying.
also some pentile displays are slower between subpixels; my Atrix 4G had very slow blue white pixels (RGBW) so you had a weird dimming as well when scrolling through texts.
Settings, Display, disable Auto Adjust Screen Tone' as well, its a power saving thing i forgot to mention in the first write up.

Slade8525 said:
thats because AMOLED usually have a slower response time, upwards of 20ms
yep, i have some old LG CCFL LCD monitors with a claimed 2ms (more like 6-10ms) response time from 2006; they were about $300 each back then. i also have a new IPS with 30ms response time; it is annoying.
also some pentile displays are slower between subpixels; my Atrix 4G had very slow blue white pixels (RGBW) so you had a weird dimming as well when scrolling through texts.
Settings, Display, disable Auto Adjust Screen Tone' as well, its a power saving thing i forgot to mention in the first write up.
Click to expand...
Click to collapse
it can be fixed with color adjustment though so maybe a software update can fix it as well

I bought the s4 the first day it came out, after using it for couple of days i started noticing weird stuff on my photos, especially on low light photos... i went to att and one of the rep said its a known issue its called "elephant effect" im into photography and i havent heard that term before, he also said that it will be fix on the next update... so i went home and did some research about "elephant effect" unfortunately i cant can find anything related with my issue... i also did some pixel peeping and im 100% positive there's something off on the display of my phone.
Sample photos
These photos are just screenshots
You can see those weird artifacts on the pictures, i also compared my screen display to my coworker's phone and my phone was way off...
What i would suggest for those who wants to buy the new s4 or currently users, is to check the display by taking a photo on a low light and do some pixel peeping...
Sent from my SAMSUNG-SGH-I337 using xda app-developers app

Has anyone else noticed a color and contrast shift from the top to the bottom of the screen? In very low brightness settings my screen gradients from crushed black levels and a reddish hue at the top of the screen to a acceptable black levels and an more green hue at the bottom of the screen. I can try to get some pictures with my DSLR tonight to illustrate. I'll have to compare to other S4's in the same scenario. In every day use its not too noticeable, but while watching video in a completely dark environment with the brightness all the way down it now bothers me some.
Anyone have a similar experience? Thanks!

Yes I notice it. It fixes itself if you change the brightness with an app. so I'm guessing its a weird kernel thing. It only happens when the keyboard is up
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2

jetlitheone said:
Yes I notice it. It fixes itself if you change the brightness with an app. so I'm guessing its a weird kernel thing. It only happens when the keyboard is up
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I notice it with or without the keyboard. I use the Display Tester app to display a full screen white or 50% gray and now that I look at it, the red hue at the top of the screen is visible at all but 100% brightness levels. What app were you using to dim the screen, I would like to try it out.
Here is an exaggerated image I made showing the gradation (50% gray). The top of the screen would be to the left. Black levels get crushed at the top of the screen also.
(Sorry for the bad image compression, my screen doesn't have the extreme banding in it!)

WestonWW said:
I notice it with or without the keyboard. I use the Display Tester app to display a full screen white or 50% gray and now that I look at it, the red hue at the top of the screen is visible at all but 100% brightness levels. What app were you using to dim the screen, I would like to try it out.
Here is an exaggerated image I made showing the gradation (50% gray). The top of the screen would be to the left. Black levels get crushed at the top of the screen also.
(Sorry for the bad image compression, my screen doesn't have the extreme banding in it!)
Click to expand...
Click to collapse
screen adjuster, lags like hell but you can see it fixes it.
set values +5 for each color.

batanuenio said:
I bought the s4 the first day it came out, after using it for couple of days i started noticing weird stuff on my photos, especially on low light photos... i went to att and one of the rep said its a known issue its called "elephant effect" im into photography and i havent heard that term before, he also said that it will be fix on the next update... so i went home and did some research about "elephant effect" unfortunately i cant can find anything related with my issue... i also did some pixel peeping and im 100% positive there's something off on the display of my phone.
Sample photos
These photos are just screenshots
You can see those weird artifacts on the pictures, i also compared my screen display to my coworker's phone and my phone was way off...
What i would suggest for those who wants to buy the new s4 or currently users, is to check the display by taking a photo on a low light and do some pixel peeping...
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
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ill check that out; it looks like compression artifacts; what settings are you using when you shoot? also to internal or external SD card? and speed rating/brand/type of external SD card?

jetlitheone said:
screen adjuster, lags like hell but you can see it fixes it.
set values +5 for each color.
Click to expand...
Click to collapse
I tried that and it made little to no difference on my phone. I went to the AT&T store on my lunch and compared my phone to the display unit. My phone has a noticeable difference. The rep at the AT&T store suggested I take it to the local repair depot... I've never been there before but I hope they don't try to pawn a refurb phone off on me to replace my 17 day old S4. I'll let you guys know what I find out.

Slade8525 said:
ill check that out; it looks like compression artifacts; what settings are you using when you shoot? also to internal or external SD card? and speed rating/brand/type of external SD card?
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I was using auto mode on my camera and used the internal mem.

batanuenio said:
I was using auto mode on my camera and used the internal mem.
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did you zoom in, and what size (pixel wise) did you use? thats textbook macroblocking.

Hi my s4 have a yellow tint, i compare with other s4 and my s4 screen have much yellow in white screen, is faulty? Is possibile to fix it with gamma correction?

Light Bleed Issue

Are light bleed issues this noticeable normal for this phone? I've had multiple Androids and iPhones and have never noticed anything as obvious.

That is quite noticeable! Mine does not have that issue. I had bleeding issues with my former phones, but not that noticeable. If i were you, ill have it checked by the service center.

vince_junior said:
That is quite noticeable! Mine does not have that issue. I had bleeding issues with my former phones, but not that noticeable. If i were you, ill have it checked by the service center.
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Thanks for the input. I just wanted to know if it was a normal thing with Huawei screens.

Mine seems to have the same noticeable light leaks, but only if I crank it up to the highest brightness setting. The most apparent ones are also near the Sim / SD card slots and another near the volume rockers. It doesn't bother me though. Does anyone else get these?

chololazo said:
Mine seems to have the same noticeable light leaks, but only if I crank it up to the highest brightness setting. The most apparent ones are also near the Sim / SD card slots and another near the volume rockers. It doesn't bother me though. Does anyone else get these?
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Yup, that's the exact same spots as my phone. It's very annoying to me when I tried to put dark wallpapers and during movie watching, especially for really widescreen vids that have to be letterboxed. Pretty disappointed in this.

Buddy Revell said:
Yup, that's the exact same spots as my phone. It's very annoying to me when I tried to put dark wallpapers and during movie watching, especially for really widescreen vids that have to be letterboxed. Pretty disappointed in this.
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I do not know if it will work for you, but it works for me. Just press strongly with your finger the bezel in a way that minimize the light bleed. Little by little you should manage to have à more homogenous back light.

Well, the light bleed problem is also noticeable in the replacement AM7 I received. Not very good for watching movies with lots of black or for using black themes/wallpapers imo. Here are pics of them next to an iPhone, all with the same wallpaper.

^wow, the light bleed issue in your unit is really serious! And even the replacement has the same problem?
However, in my unit, no matter how I try to look at it, in dark and completely black wallpapers, I cant seem to find any lihht bleed.
I wonder if other users here also experience this issue?

This situation is very frustrating. I wonder how common of a problem this is with the AM7?

haven't got my phone yet but will check it out for this issue

Wow. While my phne was in recovery installing latest OTA update, against a very dark bacground, I noticed the light bleed on the right side, where the power and volume buttons are located.
So yes, I confirm the light bleed. And I think it is a build issue.

vince_junior said:
Wow. While my phne was in recovery installing latest OTA update, against a very dark bacground, I noticed the light bleed on the right side, where the power and volume buttons are located.
So yes, I confirm the light bleed. And I think it is a build issue.
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If/when you have time, can you post a pic or two so I can compare it to mine? Salamat, brotha!

No issue on my L09
Sent from my HUAWEI MT7-L09 using XDA Free mobile app

Can anyone have issues with screen brightness? Cause my friend mate 7 is brighter than mine..and colo of my screen is not so white ..it take pink shape..
I havent notized this..but now that i have both phones in my hand it's bothering me :/
sent from me. :]

papaver said:
Can anyone have issues with screen brightness? Cause my friend mate 7 is brighter than mine..and colo of my screen is not so white ..it take pink shape..
I havent notized this..but now that i have both phones in my hand it's bothering me :/
sent from me. :]
Click to expand...
Click to collapse
Did you make sure auto brightness was disabled after sliding the brightness slider to max? Moving it to max alone doesn't give you maximum brightness.
As for the tint, you can change the colour temperature of your screen by going Settings -> Display -> Colour Temperature. Adjust that till you're happy with the colour tint.

NiceCarpet said:
Did you make sure auto brightness was disabled after sliding the brightness slider to max? Moving it to max alone doesn't give you maximum brightness.
As for the tint, you can change the colour temperature of your screen by going Settings -> Display -> Colour Temperature. Adjust that till you're happy with the colour tint.
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I tried all of this.. And my friend phone is still brighter and more lighter than mine :/
sent from me. :]

http://tapatalk.imageshack.com/v2/15/01/12/c674fb9731af01bcdfb4f1c5feadcdd.jp
Notize the difference? On both are same settings..and mine is lover..and has white spot on it :/
sent from me. :]

I was in the store today..and the phone they have is even worse..the screen is looking white red..so it must be serial difderent from phone to phone
sent from me. :]

your phone is the one on the left @papaver?
its pretty yellowish and warmer. i was thinking of display settings, too, but you said you tried all settings and your friend's phone is still brighter.
also, that white spot is pretty alarming. i guess you have to show it to the service center technician for diagnostics.

Yeah..but the gold huawei in store is even worse.. i wouldnt notized the difference between screen if there werent be two mate7 at home..
Maybe i will give it to services..i asked today and in the store said that they have to send it to official service in our country and than it would take month or more to have back my phone..so i will see
sent from me. :]