Ambient light sensor location - OnePlus 7 Questions & Answers

Finally, got the OP7 few days ago. I'm real happy about this phone except some few quirks. One of the thing that drives me nut sometimes is the auto brightness adjustment. First of all, why do the even call this the "Adaptive brightness" in the first place. Does it have any thing extra to the generic implementation?
Anyway the thing is the there could be something wrong with the way I hold the phone, covering the ambient light sensor. Making it not sense the changing lighting conditions. Anyone knows exactly where is it located?

jenny673 said:
Finally, got the OP7 few days ago. I'm real happy about this phone except some few quirks. One of the thing that drives me nut sometimes is the auto brightness adjustment. First of all, why do the even call this the "Adaptive brightness" in the first place. Does it have any thing extra to the generic implementation?
Anyway the thing is the there could be something wrong with the way I hold the phone, covering the ambient light sensor. Making it not sense the changing lighting conditions. Anyone knows exactly where is it located?
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Click to collapse
What I found with auto ambient light sensors is that they allegedly learn your usage patterns. What I tend to do to help it learn quicker is that I'll manually adjust the brightness slider when it's too bright or too dark for me.
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jenny673 said:
Finally, got the OP7 few days ago. I'm real happy about this phone except some few quirks. One of the thing that drives me nut sometimes is the auto brightness adjustment. First of all, why do the even call this the "Adaptive brightness" in the first place. Does it have any thing extra to the generic implementation?
Anyway the thing is the there could be something wrong with the way I hold the phone, covering the ambient light sensor. Making it not sense the changing lighting conditions. Anyone knows exactly where is it located?
Click to expand...
Click to collapse
I'm not exactly sure where is located
But the thing about "adaptive brightness" is that it would learn from how you are using the phone so it would know how to behave in different light conditions.
Like for example : Maybe you don't like the brightness to go all the way down when you are in a pitch dark room but rather being a little bit above so technically what you need to do is to manually adjust to the desired brightness and so adaptive brightness will learn that you like it that way in that condition.
The more you adjust it the best it should get ( give it a few weeks ) but right now i think it's a little bugged, but some have reported that is been fixed in the last Q dev rom.

PriPhaze said:
I'm not exactly sure where is located
But the thing about "adaptive brightness" is that it would learn from how you are using the phone so it would know how to behave in different light conditions.
Like for example : Maybe you don't like the brightness to go all the way down when you are in a pitch dark room but rather being a little bit above so technically what you need to do is to manually adjust to the desired brightness and so adaptive brightness will learn that you like it that way in that condition.
The more you adjust it the best it should get ( give it a few weeks ) but right now i think it's a little bugged, but some have reported that is been fixed in the last Q dev rom.
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Limeybastard said:
What I found with auto ambient light sensors is that they allegedly learn your usage patterns. What I tend to do to help it learn quicker is that I'll manually adjust the brightness slider when it's too bright or too dark for me.
Sent from my SM-G975U using Tapatalk
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Oh I see. That's good to know. I was not aware of this. As far as the proximity and ambient light sensors are considered. They don't physically exist rather the proximity and ambient response is done without hardware but with software with AI. You can refer the link below regarding this for a better understanding coz I don't really know how, it seems sophisticated.
https://www.ellipticlabs.com/2019/0...eaner-design-to-oneplus-7-series-smartphones/
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I'm not sure if this article can be applied for the OP7, but it's interesting nonetheless.
https://piunikaweb.com/2019/06/13/o...ensor-demystified-how-it-works-or-gets-buggy/

Will do. Thanks
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w41ru5 said:
I'm not sure if this article can be applied for the OP7, but it's interesting nonetheless.
https://piunikaweb.com/2019/06/13/o...ensor-demystified-how-it-works-or-gets-buggy/
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Click to collapse
Yep, even on my s10plus its glitchy in fact I'd go further by saying it doesn't work like it used to.
Example, the alway on display now doesn't turn off when you cover the ambient sensor where as in the previous older devices like the note 9 it would. When using a folio wallet case the screen still stays on for AOD.
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It's behind the screen, just like the OP7 Pro. You can see the IR light with another camera. Or in direct sunlight, you can see two holes just below the camera cutout (and finger print).
Basically same as 7 Pro... which is not like old sensors.

heov said:
It's behind the screen, just like the OP7 Pro. You can see the IR light with another camera. Or in direct sunlight, you can see two holes just below the camera cutout (and finger print).
Basically same as 7 Pro... which is not like old sensors.
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Gotcha[emoji106]
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Related

[Q] app to increase max brightness on transformer

hi, unlike a lot of android users i dont have issues with my battery life. so one day i thought about my eeepc i have and recall that i have an app that has a feature to actually make my screen brighter. so its like: low-mid-max-ultra, when ultra makes like an 120% of the screen bright.
so ive started searching for that on android but with no success. anyone know some app that will make transformer screen even brighter then max brightness?
cause i can really use that outdoor, as we all know its very difficult seeing something with direct sunlight, more like impossible.
thanx by advance
I do not see why you would want the screen any brighter. even in full sunlight with the screen brightness setting on auto I can read the screen very well. far better than my laptop.
wilcovh said:
I do not see why you would want the screen any brighter. even in full sunlight with the screen brightness setting on auto I can read the screen very well. far better than my laptop.
Click to expand...
Click to collapse
+1 I dont have any problems with sunlight here the screen is bright enough
I don't know if such a thin exists.
My guess is no.
wierd. well maybe its because i have a matte screen protector, although i dont remember been any different without it. anyways, i think it'll be nice to have the ability to brighten it even more because i think that we still not Exercising this ips panel full potential.
but thats only me...
Look into an app called "Lux (Beta)". I know it lets you get dimmer than stock - not sure about brigter (ask the dev - he's very responsive). Tons of other features as well. It does costs $.99, but well worth it, in my opinion - my auto-brightness now actually works!
Sent from my Transformer TF101 using Tapatalk
I know this is a slightly old topic but I wonder if anyone found a working (and not too dangerous) way to increase the max. brightness?
look for an app called "Display brightness" by RubberBigPepper.
According to the Android developers guide, the brightness is adjustable from 0 to 255, so it's possible.

Is the screen resolution really that bad?

I'm hearing really negative reviews on the tab plus screen resolution as it's not great outside in the sun and it is unbearable. Is this true? Do you guys believe the screen resolution to be really that bad? Thanks.
The screen resolution has absolutely nothing to do with sunlight readability so I don't really understand what you mean here
jumpman23j said:
I'm hearing really negative reviews on the tab plus screen resolution as it's not great outside in the sun and it is unbearable. Is this true? Do you guys believe the screen resolution to be really that bad? Thanks.
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Had not heard of these reviews. Links?
StingerDog said:
Had not heard of these reviews. Links?
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Don't know if it's against the rules but one was from Cnet. Another user was talking about it as well. Don't flame me, i'm just trying to see if it's all hogwash per say because i'm really considering getting a galaxy tab plus.
the resolution is fine for my eyes. I don't quite get what all the hype about resolution is these days... My computer monitor is around 100ppi... Why do I need a tablet or phone that has 400ppi?
What about the brightness level. That's the issue I've heard some things about. People are saying that the GT+ is very dim and difficult to see outside.
Sassapphras said:
What about the brightness level. That's the issue I've heard some things about. People are saying that the GT+ is very dim and difficult to see outside.
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Click to collapse
I can't comment on that, really. 99% of my usage is indoors, and I might have to wait until May before there's another sunny day where I live. Then again, the only tablet-like devices I've ever seen that are actually good in the sun are e-ink devices (kindle touch, nook touch, etc)
Sassapphras said:
What about the brightness level. That's the issue I've heard some things about. People are saying that the GT+ is very dim and difficult to see outside.
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Click to collapse
Again, some sources for where this brightness issue is coming from would certainly shed some light (excuse the pun)?
I have to agree with garyd9 here. My tablet lives indoors most of the time. The few times I've been outdoors with it I was able to crank up the brightness to where I had no issue with seeing the screen. Typically I leave the brightness set between 20-35% indoors and occasionally to as high as 45-50% depending on the light in the room. In full dark I run it to minimum as its too bright. Maximum is insanely bright and I can't imagine many scenerios where I would need it to be that bright.
It should be noted that I don't use the auto brightness as it is wholly inadequate for the purpose. I imagine that users who are complaining of dim screens are relying on the auto brightness feature and not adjusting the brightness manually. Overall I find the tablets brightness to be more than capable of handling the job.
StingerDog said:
Again, some sources for where this brightness issue is coming from would certainly shed some light (excuse the pun)?
I have to agree with garyd9 here. My tablet lives indoors most of the time. The few times I've been outdoors with it I was able to crank up the brightness to where I had no issue with seeing the screen. Typically I leave the brightness set between 20-35% indoors and occasionally to as high as 45-50% depending on the light in the room. In full dark I run it to minimum as its too bright. Maximum is insanely bright and I can't imagine many scenerios where I would need it to be that bright.
It should be noted that I don't use the auto brightness as it is wholly inadequate for the purpose. I imagine that users who are complaining of dim screens are relying on the auto brightness feature and not adjusting the brightness manually. Overall I find the tablets brightness to be more than capable of handling the job.
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Thank you for your honest opinion. I guess that's what I was looking for earlier but maybe I was just misunderstood or something. But I thank all you guys for your honest opinions here.
jumpman23j said:
Thank you for your honest opinion. I guess that's what I was looking for earlier but maybe I was just misunderstood or something. But I thank all you guys for your honest opinions here.
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Click to collapse
You may also consider checking out the tablet in the store if possible. Stores are usually very well lit inside and should give you an excellent idea of the tablet's display capabilities.
For future reference so there's no confusion: your initial post contained contradictory information. You were asking about screen resolution when you really meant brightness. Which, as captnodegard pointed out, are two completely different things. It's helpful to use the correct terms when asking for advice. It's also best to cite sources when referring to other critical reviews, as some people may not have seen those reviews.
Good luck in your decision!
Sassapphras said:
What about the brightness level. That's the issue I've heard some things about. People are saying that the GT+ is very dim and difficult to see outside.
Click to expand...
Click to collapse
THIS TAB SUCKS!!!! (I'm referring to Ainol's Novo7 Tablet. haha).
Anyways, I have a lot of experience using the GT+ outdoors since i always bring it with me in my college. Most of the times i use it outdoors when the sun is in its full glory. I have a matte screen protector which is why sun reflection is not an issue. However, I have to increase the brightness to 80% just so that i can have a pleasant view on the screen. 60% brightness is usable but I love the colors when I'm using it with 80%.
I also notice that the back gets hot whenever i turn FULL brightness on. Which is why, i capped myself to only increase brightness to 80%.
However, I live in the Philippines where a 32 degrees Celsius (90 degrees Fahrenheit) is normal which could have contributed to the back heating up.
In my opinion, the screen brightness was too dim. Particularly in auto brightness. Compared to my Sony s and htc flyer, I wasn't impressed. Selling mine because of this and other disappointments.
Sent from my GT-I9100 using xda premium
whmcal said:
In my opinion, the screen brightness was too dim. Particularly in auto brightness. Compared to my Sony s and htc flyer, I wasn't impressed. Selling mine because of this and other disappointments.
Sent from my GT-I9100 using xda premium
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so don't use auto brightness. did you even try disabling Auto Adjust Screen Power? It can be found in Settings >> Screen. It's different from Auto Brightness.
diospada11 said:
so don't use auto brightness. did you even try disabling Auto Adjust Screen Power? It can be found in Settings >> Screen. It's different from Auto Brightness.
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Click to collapse
Thanks for your reply. I guess it's good to rant sometimes. You pointed out something I missed in your post ...auto adjust screen power. It has improved brightness a little
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whmcal said:
In my opinion, the screen brightness was too dim. Particularly in auto brightness. Compared to my Sony s and htc flyer, I wasn't impressed. Selling mine because of this and other disappointments.
Sent from my GT-I9100 using xda premium
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Click to collapse
What "other disappointments"? Just curious.
I routinely use the tab as a TV in the car during traffic on my commute and if the sun is behind me then its essentially unwatchable at 100% brightness but aside from that it works fairly well.
I don't know how well it stacks up against other 7'' offerings except the Nook Tablet which I had tried out first in my hunt for 720p playback and the two seem similar in screen brightness.
I have noticed the 7+ does not feel as bright as my 10.1 but overall it works well enough outdoors and no screen except e-ink really works well in direct sunlight anyway.
I back up that last claim with testing done on:
Galaxy S and S II
iPhone 4 and 4S
iPad 1 and 2
Galaxy Tab 10.1 and 7+
The time I tried to use my laptop outside after I said "Gee it sure is nice outside"
mohawkx said:
What "other disappointments"? Just curious.
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Click to collapse
The inability to customise mini apps, disappointing. This is available on 7.7. Also, the peel application is unable to control several of my devices...e.g. found no support for VCR. Found Sony S much better for this. Poor position of power button allows frequent accidental activation whilst working with device. I admit latter point could be due to my own clumsiness
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whmcal said:
The inability to customise mini apps, disappointing. This is available on 7.7. Also, the peel application is unable to control several of my devices...e.g. found no support for VCR. Found Sony S much better for this. Poor position of power button allows frequent accidental activation whilst working with device. I admit latter point could be due to my own clumsiness
Sent from my GT-I9100 using xda premium
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Thanks for the comeback. All very valid points.

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...
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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...
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
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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?
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
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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
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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
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.
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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?

Samsung needs to get rid of the ambient light sensor used by always on display.

always on display is a great tool. but it isn't nearly as effective when it is displayed so dimly. the ambient light sensor of this app is terrible. it is almost impossible to see most of the time. i think that samsung needs to give us a setting to use adaptive sensor, 50% or 100% on. this would benefit everyone. it is NOT bright enough to bother anyone trying to go to sleep, when it is on its brightest. but it is sharp and easy to see when it is on its brightest. so please samsung, people want the ability to make decisions about these kinds of things. allow us a few brightness choices for the always on display.
Totally agree! I've found it is useless for me especially at night with how dim it is.
Sent from my SM-G930W8 using Tapatalk
Devhux said:
Totally agree! I've found it is useless for me especially at night with how dim it is.
Sent from my SM-G930W8 using Tapatalk
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It would be harder to see during the day, not at night.
Sent from my SM-G935F using Tapatalk
I like it when its dim most of the time, and bow bright it goes when i look at it outside to see the clock without turnin on the screen. My issue is its not reliable. Sometimes it doesnt turn off when i put it in my pocket, or it turns off in my pocket but when i take it out it doesnt turn on ?? Anyone with this issue ?? Im on .22 version.
I like how dim it is now. I put my phone on a wireless charger stand on my desk and it was annoying see it bright and bouncing around so I stopped using then.
I beg to differ.... as I actually prefer it to be as dim as possible - especially in a dark room.
Remember what the purpose it is for...
That being said, I do agree with the OP for wanting it to be adjustable - it should be!
kittiyut said:
I beg to differ.... as I actually prefer it to be as dim as possible - especially in a dark room.
Remember what the purpose it is for...
That being said, I do agree with the OP for wanting it to be adjustable - it should be!
Click to expand...
Click to collapse
I feel the same. Someone above said it was especially hard to see at night, but that makes no sense as it is perfectly visible at night.
If you applied the update, and want to get rid of the dimmer display, just go into the Application Manager and delete AOD. That will uninstall the update and revert to the original version.
CuBz90 said:
I feel the same. Someone above said it was especially hard to see at night, but that makes no sense as it is perfectly visible at night.
Click to expand...
Click to collapse
To be fair, I usually would use it at night. I don't have the best vision and usually do want it a bit brighter than most would.
I guess I should have clarified that - for my case I commented on nighttime viewing since that's where I usually had it enabled. It really is something that needs to be adjustable
Sent from my SM-G930W8 using Tapatalk
Devhux said:
To be fair, I usually would use it at night. I don't have the best vision and usually do want it a bit brighter than most would.
I guess I should have clarified that - for my case I commented on nighttime viewing since that's where I usually had it enabled. It really is something that needs to be adjustable
Sent from my SM-G930W8 using Tapatalk
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Ah ye I understand what you mean. Sorry if I caused any offense.
Sent from my SM-G935F using Tapatalk

Quirky adaptive brightness behavior on the Pixel 2

Hi all.
Very proud owner of the Pixel 2 here. Absolutely loving the phone. Was thinking of getting the XL but when I saw the screen in person it was an absolute deal breaker with the blue tint. It was so distracting, especially when you have the Pixel 2 beside it with minimal color shift.
Wanted to get feedback from people if they are encountering any weird behavior with their adaptive brightness. When I turn mine on and am in a dark room it changes brightness a lot despite the ambient light not really changing. Not a huge deal but enough that I am managing the brightness myself.
I'd prefer an option where the phone would take a birghtness reading when first unlocked and stick to it. I know that flux had this feature but now I can't find it in the store.
Any thoughts?
Sent from my Pixel 2 using Tapatalk
Adaptive brightness has seemed a bit quirky on every phone I've owned that had the feature.
foosion said:
Adaptive brightness has seemed a bit quirky on every phone I've owned that had the feature.
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Click to collapse
Nah its mainly the Pixel/Nexus line that have issues for adaptive brightness. The Pixel in particular is horrendous for this.
My OnePlus 5 has excellent adaptive brightness, and every Samsung phone from the S7 onwards has had best in class for android adaptive brightness, especially since its customisable.
For whatever reason though, I had to keep my Pixel XL on manual brightness because it was so damn broken otherwise.
Mine isn't responsive enough to changes in light. It's too bright or too dark.
I noticed the janky adaptive brightness on initial setup as well. I always turn it off anyway so not a big deal for me. I'm sure this will be fixed in an update. Thinking this should be one of the easier bugs for them to squash.
Sent from my Pixel 2 using XDA Labs
juanpanlilio said:
Hi all.
Very proud owner of the Pixel 2 here. Absolutely loving the phone. Was thinking of getting the XL but when I saw the screen in person it was an absolute deal breaker with the blue tint. It was so distracting, especially when you have the Pixel 2 beside it with minimal color shift.
Wanted to get feedback from people if they are encountering any weird behavior with their adaptive brightness. When I turn mine on and am in a dark room it changes brightness a lot despite the ambient light not really changing. Not a huge deal but enough that I am managing the brightness myself.
I'd prefer an option where the phone would take a birghtness reading when first unlocked and stick to it. I know that flux had this feature but now I can't find it in the store.
Any thoughts?
Click to expand...
Click to collapse
I believe you're actually looking for Lux
https://play.google.com/store/apps/details?id=com.vito.lux
Ya mines seems to be fairly jumpy to I remember there was an exposed module that fixed this on the nexus 5 or custom rom
Chronzy said:
I noticed the janky adaptive brightness on initial setup as well. I always turn it off anyway so not a big deal for me. I'm sure this will be fixed in an update. Thinking this should be one of the easier bugs for them to squash.
Sent from my Pixel 2 using XDA Labs
Click to expand...
Click to collapse
It shouldn't need to be squashed though. This is such a basic feature of all phones since at least 2009 and should just be a copy/paste of old code from any working auto brightness system. This is why people are so frustrated with Google right now. They're charging flagship prices for flagship phones, but can't even get the basics done right.
/rant
I'm still probably going to get one though.

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