To those who have no banding: Have you tried this? If you have, and still see no banding, can you post a photo of it?
How to see the color banding: go to Settings, then Apps, then tap on an app and choose "Uninstall" (you can still cancel, don't worry). This screen has a gray gradient that shows severe banding on my One X, especially near the bottom of the screen. And not just banding where you see the transition between one shade and the next, but there are (many) places where the stripes go dark-light-dark.
I took a picture of my One X on that screen (using my Captivate, handheld--not the best result, but it does show the banding). I also attached a screenshot for comparison (it'll only show whatever banding your computer display has).
Since I have two smartphones, a laptop, and an HDTV here, I decided to compare the banding on the four displays. Here are my findings:
Captivate (SAMOLED) - banding is almost undetectable at all viewing angles.
Laptop screen (Dell Studio XPS 13, LCD) - banding is somewhat noticeable, slightly worse depending on viewing angle.
HDTV via HDMI (Sharp LCD, low end) - banding is slight to severe, viewing angle matters a lot.
One X - Noticeable banding from all angles (viewing angle seems to be irrelevant to this screen, which is great).
The One X's screen is still the best I've ever seen on a phone. Let's not lose perspective here! I'm just trying to investigate this particular minor issue.
Edit: In case it's not clear, I compared the banding by viewing the same screenshot on all four displays.
That looks more like how they are displaying that particular screen than anything hardware related. Otherwise we would see those bands everywhere.
AvengerBB said:
That looks more like how they are displaying that particular screen than anything hardware related. Otherwise we would see those bands everywhere.
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Click to collapse
This.
AvengerBB said:
That looks more like how they are displaying that particular screen than anything hardware related. Otherwise we would see those bands everywhere.
Click to expand...
Click to collapse
It has to do with that particular screen because
It's a linear gradient--stripes are easier to notice,
the start and end colors are not very different,
the gradient is large.
Points 2 and 3 mean there are fewer intermediate shades, and they're stretched out over a larger area. So, yes, that screen is a challenging image for a display to render, but that's exactly what "color banding" refers to--how well does a display cope with such gradients?
If you think it's not hardware related, just take a screenshot, and view that image file on your computer or another phone. The bands are less noticeable.
And again, I feel like I need to repeat that this is the best screen I've ever used, and I love it. I'm just trying to get a handle on this one issue.
Tinyboss said:
To those who have no banding: Have you tried this? If you have, and still see no banding, can you post a photo of it?
How to see the color banding: go to Settings, then Apps, then tap on an app and choose "Uninstall" (you can still cancel, don't worry). This screen has a gray gradient that shows severe banding on my One X, especially near the bottom of the screen. And not just banding where you see the transition between one shade and the next, but there are (many) places where the stripes go dark-light-dark.
I took a picture of my One X on that screen (using my Captivate, handheld--not the best result, but it does show the banding). I also attached a screenshot for comparison (it'll only show whatever banding your computer display has).
Since I have two smartphones, a laptop, and an HDTV here, I decided to compare the banding on the four displays. Here are my findings:
Captivate (SAMOLED) - banding is almost undetectable at all viewing angles.
Laptop screen (Dell Studio XPS 13, LCD) - banding is somewhat noticeable, slightly worse depending on viewing angle.
HDTV via HDMI (Sharp LCD, low end) - banding is slight to severe, viewing angle matters a lot.
One X - Noticeable banding from all angles (viewing angle seems to be irrelevant to this screen, which is great).
The One X's screen is still the best I've ever seen on a phone. Let's not lose perspective here! I'm just trying to investigate this particular minor issue.
Click to expand...
Click to collapse
My understanding of color banding is that it is not so much a function of hardware, but one of software. It depends on the number of shade of a color available. The fewer bits available to display different shades, the worse the banding would be. I'm not very good at explaining it, see wikipedia for more: http://en.wikipedia.org/wiki/Colour_banding
My point is that I don't think that it's a defect of any sort. I think that what we're seeing (I checked mine in the uninstall screen and there's some slight banding) is that gradient from light gray to darker gray is probably a low resolution and low color resolution graphic.
For another example, go to this page:
http://tomobriendc.net/images/Green_Gradient_to_black.png
That's a higher resolution image that gradients from green to black. When viewed at the default browser resolution, I see absolutely no banding. When I zoom in to have the image fill the screen, which puts it stretched, I can see very slight banding in the green end. Further zooming increases the banding, but by then I'm zoomed far past the full size image.
I guess what I'm trying to say is that I think this is a non-issue. The amount of banding visible (if any) has at least as much to do with the image you're trying to view as it has to do with the display. If you don't get color banding in pictures that you take, or in the UI that you use every day, then I wouldn't worry about it in the slightest.
Alright guys, I know what color banding is, and I think I was very clear in my first post that I took a screenshot, and viewed the same screenshot on four different displays. This is not about software, bit depth, or image resolution. It's about whether this display shows more color banding than other displays.
And I do agree that in typical use it's a non-issue.
AvengerBB said:
That looks more like how they are displaying that particular screen than anything hardware related. Otherwise we would see those bands everywhere.
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Click to collapse
Every single new phone section had to have at least 4 of these topics. I swear I see them anytime a new phone pops out. My money is on software.
Sent from my HTC One X using Tapatalk 2
robstunner said:
Every single new phone section had to have at least 4 of these topics. I swear I see them anytime a new phone pops out.
Click to expand...
Click to collapse
Of course you do. People just got their brand new gadget that they've been looking forward to for months, and will be living with every day for a year or two. Naturally they want to poke around and check out every little detail. At least some of us do anyway, and we're probably over-represented on forums dedicated to phones!
The second photo looks like a screen capture and I see banding.
Wouldn't that mean it's software related?
wrxdrunkie said:
The second photo looks like a screen capture and I see banding.
Wouldn't that mean it's software related?
Click to expand...
Click to collapse
It is a screen capture, and it just means the display you're viewing it on also has some banding. I see it on my computer display, too, just not nearly as much as on my One X.
Tinyboss said:
It is a screen capture, and it just means the display you're viewing it on also has some banding. I see it on my computer display, too, just not nearly as much as on my One X.
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Click to collapse
I don't know if this helps but my One X, computer, and new iPad all show banding on the screen capture.
wrxdrunkie said:
The second photo looks like a screen capture and I see banding.
Wouldn't that mean it's software related?
Click to expand...
Click to collapse
This issue is completely software related. Pointless thread.
Tinyboss said:
Alright guys, I know what color banding is, and I think I was very clear in my first post that I took a screenshot, and viewed the same screenshot on four different displays. This is not about software, bit depth, or image resolution. It's about whether this display shows more color banding than other displays.
And I do agree that in typical use it's a non-issue.
Click to expand...
Click to collapse
Nowhere in OP does it say you used the same picture across all displays.
Regardless, this is a software/image dependent "issue." You can see banding on any display, regardless of whether it's a 20 year old CRT or Samsung's brand new $9000 OLED TV. It's a NON-ISSUE.
Banding
I also think this is a software issue. However, the screen shot the OP posted of his One X looks way worse than mine does. Mine barely has any of the banding and is mostly black all the way through other than at the very bottom. It just doesn't progress upwards like is does. However, if you dont always see the banding on a black screen then its in the software. Take a picture of something that is completely black or do a screen shot of something black and view it in the gallery and if you don't see the banding then this is obviously just the particular uninstall app causing this.
Tinyboss said:
It is a screen capture, and it just means the display you're viewing it on also has some banding. I see it on my computer display, too, just not nearly as much as on my One X.
Click to expand...
Click to collapse
lol SOOOO wrong. Unless you've got your computer display set to 16-bit color or less, it's got NOTHING to do with the display on your computer.
It's 100% software related. It'll likely get fixed. When we got ICS ports onto the DHD there was banding, far worse than these pics, and it was fixed with an update.
Yes, different display types can ACCENTUATE the issue to various levels, but if the software were rendering everything right, you wouldn't see banding, no matter what display your device has.
It's all about the pixels. If the pic has less pixels then the actual screen resolution you will see that the banding is greater, because ICS is made to stretch to all phones that's why it's more noticeable on larger devices.
Sent from my HTC One X using XDA
belyle said:
Nowhere in OP does it say you used the same picture across all displays.
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Click to collapse
Oops, you're correct...I rewrote that first post many times as I tried various things and added/removed information, and I must have left that part out. I edited it for clarity. Thanks.
Regardless, this is a software/image dependent "issue." You can see banding on any display, regardless of whether it's a 20 year old CRT or Samsung's brand new $9000 OLED TV. It's a NON-ISSUE.
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Click to collapse
Yes and no. It's image-dependent only in the sense that certain images are more challenging to render correctly without banding. I realize other displays have banding (I know I was clear about that in the FP), but I'm just saying this one seems to have it worse than most.
Look, all I'm trying to do is investigate this one, minor area where my phone's screen seems to have poor performance. If it's only mine, then I'll exchange it. If they're all this way, then fine, it's still the best phone display I've ever seen, and I won't worry about it. My Captivate's display has almost no banding, but I'd be retarded to prefer it over my One's.
All I've been trying to do is determine whether there's something wrong with my screen, or if it's just how they are. And I'm pretty sure it's the latter. And that's fine.
Tinyboss said:
Oops, you're correct...I rewrote that first post many times as I tried various things and added/removed information, and I must have left that part out. I edited it for clarity. Thanks.
Yes and no. It's image-dependent only in the sense that certain images are more challenging to render correctly without banding. I realize other displays have banding (I know I was clear about that in the FP), but I'm just saying this one seems to have it worse than most.
Look, all I'm trying to do is investigate this one, minor area where my phone's screen seems to have poor performance. If it's only mine, then I'll exchange it. If they're all this way, then fine, it's still the best phone display I've ever seen, and I won't worry about it. My Captivate's display has almost no banding, but I'd be retarded to prefer it over my One's.
All I've been trying to do is determine whether there's something wrong with my screen, or if it's just how they are. And I'm pretty sure it's the latter. And that's fine.
Click to expand...
Click to collapse
You do realize the reason that your Captivate shows little to no banding is that the black pixels of the display aren't even on, right? So the Captivates blacks are truer than the One X's, but our white is more true than the Captivate's white(blue). No display is perfect, other than the ones on your face, so why bother stressing over it? If you never had any device to compare to, then you wouldn't have a single thing to have a fit about. There are going to be discrepancies and every display is going to have trouble doing at least one thing or another, nothing's perfect.
On top of that it has to do with the grade of the gradient and how quickly it's changing shades of colors. Say you're making a black to white gradient in 20-30 passes, 20-30 changes basically, it's going to be choppier than one with 100 or whatever. If you don't give it adequate time to make the change, then of course it's going to band. It's just like animating. You can't expect a 15 frame animation to display a full action scene in any bit of smoothness. It takes 100+ frames to do 3 seconds of visually smooth animation.
The banding is LITERAL BANDS of color on the screen.
The galaxy nexus does this as well on settings and a dev fixed it by updating the image used within the settings app. I'll see if I can find it.
Edit: http://forum.xda-developers.com/showthread.php?t=1588613
I have a reasonably simple solution to this issue ...
Maybe I'm wrong, or I don't quite understand the issue, but I think I have a simple solution to determine if banding is really an issue in this regard.
I'm preparing four images, which I will upload in a ZIP file along with instructions.
Give me about 10-15 minutes.
Peter
---------- Post added at 02:58 PM ---------- Previous post was at 02:46 PM ----------
Clicking on the link below will download a ZIP file called Banding. Extract the four images and place them anywhere on your device.
http://www.sierrabeyer.com/TempImages/Banding.zip
Now look at each image on your device and decide whether or not you see banding. If you do, then the unit DOES suffer from banding. If not, then it's simply an issue relating to the image used by the developer for the background image of the screen your looking at, in this case, the uninstall screen.
Why can I make this conclusion? Well, all four images are simply 1280x720 pixels, the exact resolution of the ONE X screen. Also, all four images display but ONE colour. Okay, maybe not a colour since one is black (0,0,0), and the other three are shades of grey (32,32,32 and 64,64,64 and 128,128,128).
Here are full size images:
I don't see ANY banding on my HTC ONE X screen. Each image is pure black or grey.
Let me know what you think. Does this test resolve the issue, or am I completely off base?
Peter
Addendum: I have since learned that my reasoning is flawed. If I could remove this post, I would. My apologies to everyone.
Related
I am creating this poll to see what screen problems people have with the one x.
Options are:
Color banding
Dead Pixels
Dust Under Screen
Light Bleed
Yellow Tinge
Multiple issues
Also Please Say what color One X you have
I have color banding and Light Bleed on a White one x.
too bright in general lol
Gray ATT version. I have banding and one very small dust spec just on the edge of the screen on the bottom right corner.
voluptuary said:
Gray ATT version. I have banding and one very small dust spec just on the edge of the screen on the bottom right corner.
Click to expand...
Click to collapse
Oh god, dust and dead pixels are my ocd's worst nightmares. I get so depressed when I see them Color Banding will soon be joining them too
You should add a no issue selection.
how?
Wheres the "no problems" option?
Mine has very minor light bleed, but thats it. Its only noticeable if I'm looking at a pitch black screen in a dark room.. so its pretty much no problem
Only issue I'm having is that the screen is too bright for the auto brightness.
Other than that it's perfect
No issues. But there's no option for that in the poll.
Gradient banding and light bleed (bottom right corner).
I have a yellow screen. But for me, I am getting intermittent screen flickering, specifically in Chrome and Messages.
Furthermore, I already have tons of micro scratches on my screen. Have no idea how they got there. Glad I picked up a screen protector for $3 on amazon and Ordered a Seidio Active Case also. Don;t want this beautiful screen to get a jacked up.
No issues here either.
No problem at all here! Gray one X.
Maroon Mushroom said:
Only issue I'm having is that the screen is too bright for the auto brightness.
Other than that it's perfect
Click to expand...
Click to collapse
You could try Juice defender. It has an option to change the auto brightness, both the maximum light, and the average light (and minimum)
Only thing I miss there is an option to disable it while charging or in the car.
My only issue is banding. For those who DON'T have banding, I would appreciate if you'd check out my thread on the issue, especially if you're able to post a photo of your phone's screen.
http://forum.xda-developers.com/showthread.php?t=1646446
Thanks!
no issues for me either .
banding sometimes but minor , and isnt that software related anyways?
aimetti said:
banding sometimes but minor , and isnt that software related anyways?
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Click to collapse
I don't think so. Take a screenshot when you see banding, then look at the screenshot on your computer or on another phone. When I tried that, I saw less banding on the computer and on my old Captivate than on my One X, viewing the exact same image.
I have banding, but it seems more like a software bit-depth issue than a physical problem with the screen.
KitF said:
I have banding, but it seems more like a software bit-depth issue than a physical problem with the screen.
Click to expand...
Click to collapse
Guys, I wish it were this simple, but it doesn't appear to be. I can use Paint.NET to make a gradient, and view that same image file on many screens, and my One X shows more banding than the others. It still doesn't look as bad as the One X's app-uninstall screen, which is likely because my gradient is linear and theirs isn't, and so on top of there being bands, they're also unevenly spaced! But there's no denying that the bands are there (at least on mine), and they're more apparent than on the other displays I have access to (another phone, a laptop, and a TV).
Tinyboss said:
Guys, I wish it were this simple, but it doesn't appear to be. I can use Paint.NET to make a gradient, and view that same image file on many screens, and my One X shows more banding than the others. It still doesn't look as bad as the One X's app-uninstall screen, which is likely because my gradient is linear and theirs isn't, and so on top of there being bands, they're also unevenly spaced! But there's no denying that the bands are there (at least on mine), and they're more apparent than on the other displays I have access to (another phone, a laptop, and a TV).
Click to expand...
Click to collapse
I meant a driver-level firmware issue. When I had the Nook Color, there was a kernel that enabled lower bit-depth to speed up the boot, but it introduced banding like this. There was another kernel that could show full 24-bit color and had no banding.
So just loading an image onto the phone isn't proving that is a hardware issue. This just makes my argument stronger with the uneven banding being related to bit-depth and not hardware.
I have no screen issues! @TinyBoss I saw your other post and I have to say your banding does look bad. I was leaning toward software until I compared mine to yours and I'm thinking you have a bad display...
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
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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?
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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?
Received my pixel earlier this week.
Immediately after opening the box I was quite disappointed that the display noticeably shifts towards a blue hue even at the slightest change in angle other than straight on.
I have looked at a bunch of phones on display in stores since, some of which are showing similar symptoms to varying degree.
I understand that AMOLED displays are more susceptible to color shifts at different viewing angle but this seems very extreme.
Anybody else notice the same or bothered by it?
I notice it a little bit, but it doesn't bother me until at extreme angles. I figured it was just a characteristic of AMOLED displays, I see the same shift on my watch.
now android said:
Received my pixel earlier this week.
Immediately after opening the box I was quite disappointed that the display noticeably shifts towards a blue hue even at the slightest change in angle other than straight on.
I have looked at a bunch of phones on display in stores since, some of which are showing similar symptoms to varying degree.
I understand that AMOLED displays are more susceptible to color shifts at different viewing angle but this seems very extreme.
Anybody else notice the same or bothered by it?
Click to expand...
Click to collapse
I have noticed the same on my device, 1/3 of the display at the bottom has a blue tint on light screens while holding it regularly, facing me. If I tilt the phone forward (not facing the eyes), it is better, but a very small angle change and that third of the screen is blue again. I have compared my device to another one and on the other device, it happens a lot less. Instead of just a third of the display it's the whole display that changes slightly color but in positions you wouldn't normally hold your phone. I am considering returning the device...
What have you done yourself? Do you think it is an issue?
Didn't notice until this post. That's probably because I had the same issue on the Nexus 6P. In fact, it ought to be better than this when Google are charging extortionate prices for this!
Sent from my Pixel using XDA-Developers mobile app
grattemedi said:
I have noticed the same on my device, 1/3 of the display at the bottom has a blue tint on light screens while holding it regularly, facing me. If I tilt the phone forward (not facing the eyes), it is better, but a very small angle change and that third of the screen is blue again. I have compared my device to another one and on the other device, it happens a lot less. Instead of just a third of the display it's the whole display that changes slightly color but in positions you wouldn't normally hold your phone. I am considering returning the device...
What have you done yourself? Do you think it is an issue?
Click to expand...
Click to collapse
After 4 days of back and forth with play support they have finally agreed to exchange. I looked at a lot of other phones in stores and mine certainly seemed to be worse than most of them. Worth a try. Luck of AMOLED draw I guess.
AMOLED actually has the best viewing angles of ANY display, really. My 4K LG TV's look incredible from any way I look at them.
Pentile AMOLED as seen in today's phone screens is different and the cause of this issue. The color shift occurs because of the inconsistency in sub-pixel layout... RGBGR rather that straight RGB.
now android said:
After 4 days of back and forth with play support they have finally agreed to exchange. I looked at a lot of other phones in stores and mine certainly seemed to be worse than most of them. Worth a try. Luck of AMOLED draw I guess.
Click to expand...
Click to collapse
I have received a replacement phone and the new device hasn't got the problem as much , I guess the first device was slightly imperfect and I was noticing the amoled blue tint more coming from a LCD display before on my previous phone.
The viewing angles and hue shift on my lg v10 ips screen is worse..
It's the luck of the draw most manufacturers source hardware from different vendors resulting in slightly different variations. Ie the different ram used in pixels, making some slightly faster than others.
Hello fellow XDA members,
In the past I started some threads regarding Samsung AMOLED display quality, especially for the Note devices.
Please see here if you are interessted:
https://forum.xda-developers.com/note-4/general/note4-amoled-screen-quality-t2906365
https://forum.xda-developers.com/showthread.php?t=2463786
Now, with the S8+ (and the S8, the problem is the same), even the media recognized the display problems, known as "red tint", just google for it!
Samsung tells the people that this is due to wrong settings, and/or the adaptive display setting turned on! THIS IS NOT THE CASE!!!
I got 2 pieces of S8+ today, and both displays are not OK. One screen has the red tint issue, but only on the upper half of the screen.
The other device has no red tint, but is generally darker and looks more "washed out" and has a slight yellow tint.
So again the display lottery is back, it is only "luck of the draw" if you get a decent screen or not!!!
If you do not believe me just compare a few devices beneath each other with the exact same display settings. Turn adaptive display off, then go into the dialer and type *#0*#, with this you ensure the brightness settings are the same and you have the same sceen content on both devices. You will notice that every single device has a different screen quality (tint, evenness, ...)
What do you say? Acceptable or not?
With all of us over at the tmobile shipping thread we've been waiting and crying and hoping that we get our devices early....and then when we finally got our devices ****ty things like red tint leaves a sour taste in our mouths..sad really, samsung already made this device feel rushed with all the Bixby and fingerprint scanner awkward positioning and what did we do after the note 7 debacle? We forgave these fools...and now this?....i do feel bad for those that actually paid full retail price for these expensive devices and to unbox and realize the screen is pink...that right there is not how to say forgive us for our mistakes instead a huge f u to all the customers who were unlucky enough to get such a horrible display color....but I will say I won the lottery because out of the box my s8plus came out nice no red pinkish tint whites are white...but why am I still pissed? Because my note 4 was the same whites were white and then after a year or so my eyes were fixed on a strange color that was taking up half of the screen that came out of nowhere...so yes I will be forever paranoid with sammys displays now....if my s8plus came in like that I don't think I would've came back....but then again I'm here lol
Settle down guys, this will likely be fixed with a future fw given the attention its gotten, this is pretty simple for samsung to fix actually, all samsung needs to do is what video games have been doing for years; offer the user an option to calibrate based a sample image. Once thats in, the presets can be established based off of those generated values from the user selection.
It seems like they will indeed need to implement a fix of this sorts, because it does seem the displays hue varys from device to device.
Anyways, for the most part, I hardly notice it and it seems even, and the more I look at it, the more i can't make sense out of it? Seems to play tricks on my eyes... lol.
Beautiful phone and display though!
cantenna said:
Settle down guys, this will likely be fixed with a future fw given the attention its gotten, this is pretty simple for samsung to fix actually, all samsung needs to do is what video games have been doing for years, offer the user an option to calibrate based on a sample image provided, once thats in the presets can be established based off of those generated values.
It seems they will need to implement thia because the displays vary so from device to device.
Anyways, for the most part, I hardly notice it, it seems even, and the more look at it the more i can make sense out of it, seems to llay tricks on my eyes, lol.
Beautiful phone and display though!
Click to expand...
Click to collapse
This is a hardware problem, a real software fix IS NOT POSSIBLE!!!
Samsung can only try to cammo the problem with increasing the range of the color-sliders in the display settings, so that you can turn down red more then now. But this wont fix that the red tint is NOT EVEN ACROSS THE DISPLAY!!
What else proves that this is a hardware error is that if you put 5 devices next to each other (with the exact same settings), each of them will look different in regard to screen quality! Believe me, I know what I'm talking about, see my previous threads regarding that!
I agree that it should be even otherwise you may have a hardware problem but my concern is your criticism has more to do with amoled in gerneral and what we are observing is a consequence of the tech used. Samsung is also pushing the boundries here too with the display tech so the norms for amoled to compare to may not even apply anymore. And your comment to my comment regarding masking the problem, there is a reason why every display on the planet has picture settings.. right? No 2 displays are exactly the same...
I just went through the crap with my Surface Pro 4 too, trust me, they are a good example of no 2 displays alike, must have went though at least 11 Surface Pro 4 on my mission for perfection display and I had to give up in the end because truth is, its still an awesome device!
that happens when you get the early batches of s8+
h4ck3r69 said:
that happens when you get the early batches of s8+
Click to expand...
Click to collapse
Absolutely unacceptable reasoning. They shouldn't be putting out a product if the "early batches" are DEFECTIVE
Obviously it's a QC problem, which they seem to have some fairly big issues with, over and over.. They will lose customer faith if they keep doing this ****
ingenious247 said:
Absolutely unacceptable reasoning. They shouldn't be putting out a product if the "early batches" are DEFECTIVE
Obviously it's a QC problem, which they seem to have some fairly big issues with, over and over.. They will lose customer faith if they keep doing this ****
Click to expand...
Click to collapse
Perhaps but then again why did you buy a phone from samsung in the first place?.....
I was in the Samsung store yesterday for the launch party. They had 3 S8+ on display next to eachother. Each was running the exact same retail mode, showing the exact same content at the exact same time.
One display was white, one was red hued, and one was pee yellow.
(No, it wasn't display calibration settings, I checked).
There are definitely quality control issues.
GibMcFragger said:
I was in the Samsung store yesterday for the launch party. They had 3 S8+ on display next to eachother. Each was running the exact same retail mode, showing the exact same content at the exact same time.
One display was white, one was red hued, and one was pee yellow.
(No, it wasn't display calibration settings, I checked).
There are definitely quality control issues.
Click to expand...
Click to collapse
And which of the 3 do you have?
I noticed a slight pinkish tint when the shipping screen protector was on, but looks ok without it.
Something slightly different this year is there seems to be a pink tinge on all four sides of the display (top, bottom, left and right). It's a very consistent along the sides of the screen and very noticeable, a few people here have also noticed it: https://forum.xda-developers.com/galaxy-s8/help/red-tint-screen-t3592335
So it's not just another pink/yellow/blue/green spotty tinge problem, theres now uniformity with the example i've provided.
I've got the S8+ and the screen is not red at all. The left and right edges if anything have a slight blueish tone to them but I believe this to be the effect of the screen curving to the sides distorting the colour (Colour shift?).
Unless you have bought one and have the problem with it, you have no right to complain.
cantenna said:
And which of the 3 do you have?
Click to expand...
Click to collapse
Mine had a very slight pink tinge when I got it, at the very top and bottom (maybe half the status bar thickness), and it's since gone way.
The over all display color was a little too warm for my liking, so I knocked the red slider down to half, and now it's fine.
Got me and the wife one yesterday from At&t. No red tint and best phone yet. I love it.
My display is freaking beautiful and I love the fingerprint location. I never had any trouble. My finger finds it very naturally
Sent from my SM-G955U using Tapatalk
TML1504 said:
Hello fellow XDA members,
In the past I started some threads regarding Samsung AMOLED display quality, especially for the Note devices.
Please see here if you are interessted:
https://forum.xda-developers.com/note-4/general/note4-amoled-screen-quality-t2906365
https://forum.xda-developers.com/showthread.php?t=2463786
Now, with the S8+ (and the S8, the problem is the same), even the media recognized the display problems, known as "red tint", just google for it!
Samsung tells the people that this is due to wrong settings, and/or the adaptive display setting turned on! THIS IS NOT THE CASE!!!
I got 2 pieces of S8+ today, and both displays are not OK. One screen has the red tint issue, but only on the upper half of the screen.
The other device has no red tint, but is generally darker and looks more "washed out" and has a slight yellow tint.
So again the display lottery is back, it is only "luck of the draw" if you get a decent screen or not!!!
If you do not believe me just compare a few devices beneath each other with the exact same display settings. Turn adaptive display off, then go into the dialer and type *#0*#, with this you ensure the brightness settings are the same and you have the same sceen content on both devices. You will notice that every single device has a different screen quality (tint, evenness, ...)
What do you say? Acceptable or not?
Click to expand...
Click to collapse
=======
im not tying to be a jerk but just curious what happens when you cycle the --blue light filter-- button in the pull down menu with the wifi, Airplane mode ect.
reason i ask my displays is perfect but with the blue light filter on which is to reduce eyestrain ..then the display is very red
Really did not know they had this till i play around with it
Jonathan-H said:
I've got the S8+ and the screen is not red at all. The left and right edges if anything have a slight blueish tone to them but I believe this to be the effect of the screen curving to the sides distorting the colour (Colour shift?).
Unless you have bought one and have the problem with it, you have no right to complain.
Click to expand...
Click to collapse
I have an S8+ as per my posts in the other thread, so I have a right to complain.
Firstly, it could well be fixed by software, even if its uneven, HTC had issues with the camera doing this a number of years ago (big red spot in all pictures). It was fixed with software
Secondly, it might disappear with time. AMOLED, OLED and other self lighting technologies (like Plasma in TVs) have a bed in time, where some colour ranges need to burn in. I would suggest a full red screen using a screen tester app for a few hours, to see if it beds in the red.
Guys, I would like to take this device, there is a possibility of having a faded display?
I am wondering how are your units in regards to famous AMOLED pink shift?
Mine seems to be a bit more pink on the side making whites and darks looking uneven.
Looked at display units around shops and all units had it to some degree, also YouTube videos shows a pinkish screen nature.
How is your one?
To me pink shift implies that it turns pink when tilting the phone or viewing off angles. I don't have any problems with that however the regular OLED color uniformity is an issue on my device. Nearly ever OLED phone I've had has had some issue with this and I think some people are just more sensitive to it than others explaining why it's a non issue for most people and a huge issue for others. My Pixel 2 has a pink tink at the top 20% of the display which is minor and think most would either not notice or find acceptable. It bothers me a bit but it could be worse and I'm not sure I want to go through the trouble of RMAing the device until I get something better (OG Pixel took 3 tries and then I gave up and accepted the problem, but then my 3rd OG bricked itself and they sent me a 4th with a nearly perfect display yay!). Pink on the side or diagonally across the display is the worst I think as it's really noticeable when reading text on a white or grey background. At the top is the best case scenario for me as it's only really annoying when reading content in landscape orientation.
I spoke with a Google Tech at length today regarding the different color tints on our devices (mine is blue) and he assured me that the tinting was intended with the new screens. On a side note I notice while out in the sun when it's hard to see my screen, if I tilt slightly my device, the Blue tint actually helps me to see my screen better. Not sure if that was intended or not.....