Does anybody else's screen have a blue tint to the white's at any angle other than straight on?
I ask because mine does, and my Fascinate does, but it isn't even really noticeable.
I remember when I got my HTC incredible that some had it worse than others so I'm kind of curious if the Charge I have is an overt anomaly or if I'm just being picky.
i've owned the fascinate, the vibrant and now the charge... they all looked 'bluish' to me... especially when you compared the screens to another phone that is not an amoled.
Engadget mentioned this in their review of the Charge. Disable the auto-brightness setting, and dial it up manually. You should see the blueish tint disappear.
the bluish tint never really goes away .. at least in my experience with 3 different samsungs .. regardless of the brightness setting. turning it up all the way helps but it's definitely still noticeable .. depends on whether or not you can live with it
I'm planning to pick up a Charge this Saturday, and will be going to the store with a list of "concerns" such as this one. If I can reporduce the blue tint and then make it disappear enough to not annoy the hell out of me, I'll be leaving with one.
Luckily I know the salesperson I'm buying it from, so it will not have the OTA installed when he hands it over.
FWIW, I just realized all of my tinting issues were due to the Zagg Invisible Shield I had on it. I realized this after I took the generic brand protector off my Fascinate and realized all the colors popped more.
Yes, OLED/AMOLED/SAMOLED/SAMOLED+ screens have pink or blue tint depending on the angle, but mine was *awful* compared to my Epic 4G, Fascinate, and HTC Incredible.
Zagg screen protector off, Phantom Skin screen protector on...takes a significantly greater angle to cause the degree of tinting issues I was seeing with anything but straight-on.
Much, MUCH happier with the display now
I actually work in the oled industry , the reason you see a blusish tint is because blue lives the shortest. so to avoid degradation and increase efficiency they optimize the screens using blue as the jump point.
although it is a blue tint it by industry standards is called a cool white. when you increase intensity on the screen you see less of this tint because at the higher points the three colors intensity start to create a more pure white.
you must remember OLED compared to other screen technology is in its infancy, we have developed blue molecules that will live longer with better efficiency when you start to see these roll out in the industry more pure whites will be acheived.
You can complain about blue tint all you want but it is by design so there is nothing you can change.....now with voodoo kernels you can adjust this but you run the risk of color degradation more quickly so dont leave static images on your screen as colors will degrade faster than others and you will see "Burn in " if you will
Oh, I totally understand the blue tint to OLED's, and I'm fine with it. No complaints.
But this was *bad*. Even using the phone in my hand, every slight movement was causing it to flicker from pink to blue to warm tones and so the screen itself looked like it was having a film waved in front of it. It was distracting and awful compared to my other OLED-ish devices.
Lo and behold, it was just the screen protector type I was using. No issues with it now.
(I actually prefer cool tones to my displays anyway, so its all good.)
I am comparing 2 Charges side by side and one has a really blue tint and the other has perfect whites. Mine is the one that is really blue. My display is noticeably dimmer then the one without the bluish tint. As much as I hate to do it I might swap it out to see if I get one that does not have the blue tint.
I have used the dock on mine for about 2 weeks nightly. Could have have caused a burn in effect by keeping the clock screen on at night?
Edit: nothing is wrong with the screen. Its only noticeable if you have both right next to each other. If you look at one then the other you really can't even tell. I bought an episode of South Park on media hub and it looks better then my 46 inch Samsung led tv.
I have bought an asus infinity a week ago and it was the most exciting device i have ever had untill a white dot poped up in the middle of the screen .
Im afraid now that more dots will apear and it gets worse. so,do i have to exchange it specialy ,that i dont face any other problem with it.
ps. iam using stock rom and serial no starts with c8.
exchangeing it is very diffecult for me if it is not impossible
Could someone who has had "Bleed" problems describe how these actually look? I would like to know what to look for. Is it ambient light from the outside washing out the picture, is it blotches where the black colors are washed out, or is it something else? I notice a slight degradation in black/white transition quality when I boost the brightness to 100%, but I would consider that a normal affect.
Based on the complaints here, I feel very much in the minority of people who are content with their tablets, though I suspect the content folks have less to talk about. I am not crazy about the "looseness" of my power or volume switches, but my screen fits, the software moves within normal limits and everything else is sound.
Thanks in advance for any insight anyone can offer about the "bleed" issue.
tobnddl said:
Could someone who has had "Bleed" problems describe how these actually look? I would like to know what to look for. Is it ambient light from the outside washing out the picture, is it blotches where the black colors are washed out, or is it something else? I notice a slight degradation in black/white transition quality when I boost the brightness to 100%, but I would consider that a normal affect.
Based on the complaints here, I feel very much in the minority of people who are content with their tablets, though I suspect the content folks have less to talk about. I am not crazy about the "looseness" of my power or volume switches, but my screen fits, the software moves within normal limits and everything else is sound.
Thanks in advance for any insight anyone can offer about the "bleed" issue.
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Light bleed is a little hard to catch at times.
What to look for are bright areas around the edge of the screen.
If you hold the tablet at a low angle when the screen is presenting a gray or an off white color it will be visible (if it's there.)
Light bleed is most visible when cold booting (tablet all the way off-then powered back on) and screen is very dark.
Just about any device that has an LCD screen has varying degrees of light bleeding.
Some tablets have bleeding at all times, some just during boot and others none or it disappears after warming up.
I have sometimes noticeable light bleed from right edge, luckily it goes away after warming up..
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...
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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...
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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
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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
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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?
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Yes smearing
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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?
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Click to collapse
thats because AMOLED usually have a slower response time, upwards of 20ms
jetlitheone said:
Yes smearing
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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...
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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
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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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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...
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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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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?