SurfaceFlinger to dim the HID-AMOLED - Captivate General

I recently did a DIY dock station in my car. By the time I finished setting everything up it was quite dark outside. I really wanted to go for a test drive to test my GPS and new "Car Home" screen but came to a very fast conclusion. Our screens are too bright to be on during night driving!
Even at the lowest settings, the brightness is incredibly distracting. I use a black background and try to keep a minimalist style home screen but it is still too much. I remembered seeing the single color screens from Jeff Sharkey's blog and racked it down. I have seen some older posts referencing this subject and did some google searches with no major Galaxy S project results.
The concept seems simple enough and would provide benefit to so many people but I am no dev and do not fully understand the complications involved. Astronomers, Pilots, Soldiers, Drivers are just some that I would see benfitting from the ability to drop displays into Red or Blue "night modes."
I guess my concerns are:
Is this already a project?
Is it expected to be after the Froyo crisis?
Do enough people think as I do on this to make it even worth while?
NOTE: I in no way intend to reference the SAMOLED as anything less than exceptional. I rather have bright than dim any day!

I'd love to have this...I wouldn't need sunglasses to surf the web before sleeping.

I agree with you that there's a huge benefit to having "night mode" option for many apps. Due to the S-AMOLED screen, our phones are pulling over 1 watt of power for a white screen at max brightness, according to DisplayMate [1]. A black screen draws virtually 0 watts. So it makes every bit of sense for us to use dark screens whenever possible.
I haven't tried Cyanogen with RenderFX yet. Any comments on using color calibration to achieve this?

From what I understand, the usage of a primarily red display is nearly as efficient or more so than a darkened screen. Red provides awesome viewing in low light situations and does not effect your eyes after they have adjusted to low light.
Sent from my SAMSUNG-SGH-I897 using XDA App

Related

[Q] Black Google Mobile Saves Battery Power?

I thought everybody might want to hear about and give feedback on more unique ways to save squeeze more life out of their battery. I have been using Black Google Mobile at bGoog.com for a while now on my Android and it works awesome alongside my all black theme. It loads faster for me and it helps keep my phone bill down by reducing "bandwidth".
Check it out and let me know your thoughts?
What other unique battery life extending tips do you know?
Interesting...I never knew that this existed. The reason why they claim that it's "Battery-saving" is because of the white-on-black--aka Night Mode. I like how there's no javascript and stuff. I'm totally gonna use this as my homepage now!!
GoCkillaz said:
Interesting...I never knew that this existed. The reason why they claim that it's "Battery-saving" is because of the white-on-black--aka Night Mode. I like how there's no javascript and stuff. I'm totally gonna use this as my homepage now!!
Click to expand...
Click to collapse
Cool, thanks a lot!
Ima try this
Sent from my ADR6300 using XDA App
You people do realize that the blackness in displayed image has no effect on power consumption (except on AMOLED screens) right?
Even if the content is black, the back light is still on and drawing power. Except may be in LCD TVs employing local dimming which I am pretty sure is not employed on mobile phone screens.
chvvkumar said:
You people do realize that the blackness in displayed image has no effect on power consumption (except on AMOLED screens) right?
Even if the content is black, the back light is still on and drawing power. Except may be in LCD TVs employing local dimming which I am pretty sure is not employed on mobile phone screens.
Click to expand...
Click to collapse
This information is 100% correct. You will achieve power savings ONLY IF you use an OLED screen, since each pixel is its own light source. LCD screens use backlights, polarizers, color filters, etc... the backlights are always on, and a "black" pixel is achieved by polarizing such that no light gets through for that pixel. For OLED, each pixel can turn itself on or off completely. That's also why OLED's contrast ratios blow LCD out of the water--they achieve true blacks.
Cool Black has always improved battery life on the Nexus!
Awesome on the Vibrant!!!!!

all AMOLED users

It is time to start pushing developers of apps you like but you dont get BLACK skins/modes/themes. Start pressing developers to optimize every app they create or update by including BLACK theme to save our batteries and often life saving extra minutes of being connected before we they are drained.
Many people will appreciate if there will be at least section or website listing such a soft which contains apps with black themes.
One of worst examples is Talk Google.
Purely white and with no choice, at all, maybe good for LCD phones,
but hostile for AMOLED batteries.
What's needed I think is an accessibility setting that inverts colors, I'm photosensitive so it would be lovely to turn all the painful white on my phone to a nice non-irritative black.
But
it would need to be app based selective.
would work nice for Google Talk but Skype wihch i guess will never have black skin,
especially under strictly conservative and not always practical Microsoft management mindsets, Skype would turn to orange-like tones after reversing colours.
so i think that black skin is simple to including, and doesnt require crerativity to compose, its just white on black, easy peasy quick and nice.
so why it is not standard yet?
Agree i have a GNex and would love apps to have black themes, like some twitter apps as well as facebook. The major apps should have black themes as Samsung is one of the largest handset makers and they are obsessive with AMOLED
White screens are so terrible in the dark D:
Good
Well written
mass.w said:
It is time to start pushing developers of apps you like but you dont get BLACK skins/modes/themes. Start pressing developers to optimize every app they create or update by including BLACK theme to save our batteries and often life saving extra minutes of being connected before we they are drained.
Many people will appreciate if there will be at least section or website listing such a soft which contains apps with black themes.
One of worst examples is Talk Google.
Purely white and with no choice, at all, maybe good for LCD phones,
but hostile for AMOLED batteries.
Click to expand...
Click to collapse
I agree 100%.
I have been BEGGING imo and others to release dark themes for months.
Sent via tapatalk using the Samsung Galaxy Note
mass.w said:
It is time to start pushing developers of apps you like but you dont get BLACK skins/modes/themes. Start pressing developers to optimize every app they create or update by including BLACK theme to save our batteries and often life saving extra minutes of being connected before we they are drained.
Many people will appreciate if there will be at least section or website listing such a soft which contains apps with black themes.
One of worst examples is Talk Google.
Purely white and with no choice, at all, maybe good for LCD phones,
but hostile for AMOLED batteries.
Click to expand...
Click to collapse
You are right. It's beter for the planet too
Sent from my GT-I9100 using xda premium
some amoled screens have those nasty lines from the darker backgrounds though. i thought that was an ongoing issue.
How is that? Amoled and Super Amoled are supposed to have less battery usage. It used to consume only about 7:40% from the battery.
Sent from my S+
whereas LCD consumed up to 70% of mean battery capacity an all white screen on AMOLED should only consume 50%. There would have to be something else like processor, with today's dual core, 1.5 freq, etc. eating battery life. Lithium is an old technology that is now affordable. It is also a highly reactive and temperamental technology too. Everything from heat to humidity are enemies to lithium.
Besides this though, I agree. We can change backgrounds, etc in Linux and Windows, why not Android?
White screens are so terrible in the dark x2
we all agree with that, but i think developers will change the layouts of games or so
having amoled plus screen and using it with %25 brightness to save battery life is just
Black screens would be nice to save battery. I use bgoog as my home page in the browser to save power.
I leave my brightness at the lowest setting majority of the time, but leave it in auto when I'm out in the sun.
S2 Skyrocket
I'm using ics resurrection remix with my galaxy s2. All gapps are black themed along with messaging apps, etc. However, normal apps are lacking with black themes I 100% agree
Sent from my GT-I9100 using XDA
Hi,
I have a ZTE Blade and the screen various in some versions, some have AMOLED and others not. Has some way to figure out if I have a AMOLED screen or not ?
Dark skinned apps n themes look way better imo...hope developers take note.
Dark skinned apps do save a lot of battery and save your eyes from that bright white screen when you look at your phone in the middle of the night. But the white is nice at the same time. I guess I'm indifferent about it.
If you cant spot difference in darkness, go and google it. Find out tech-spechs from websites.
Sent from my XT910 using XDA

[Q] Using Nexus S as a Desk Clock: Screen Burn-in?

I recently purchased a dock for my Nexus as it provides easy access to incoming notifications, USB storage and doubles as a desk clock.
However, I've been reading mixed opinions on whether AMOLED screens or specifically the Nexus S screen can have burn-in or not. I would like to use my phone as a desk clock but not have any consequences to the screen after a year or so ...
Anyone use their Nexus S as a Desk Clock (for hours a day) and have you received burn in? Thanks!
I personally wouldn't unless you'd be happy to replace the screen or retire the phone within the year, specifically on the amoleds.
Blues, violets and whites lower the corresponding pixels relatively fast and can easily change the colour balance across the screen. Other colours do the same but at half the pace. Blacks won't do any harm. Unlike an LCD, each (sub)pixel will lose only its own light as its used, eventually with prolonged uneven use different parts of the screen reproduce colours differently. Lcds just lose some of their light evenly.
Harbb said:
I personally wouldn't unless you'd be happy to replace the screen or retire the phone within the year, specifically on the amoleds.
Blues, violets and whites lower the corresponding pixels relatively fast and can easily change the colour balance across the screen. Other colours do the same but at half the pace. Blacks won't do any harm. Unlike an LCD, each (sub)pixel will lose only its own light as its used, eventually with prolonged uneven use different parts of the screen reproduce colours differently. Lcds just lose some of their light evenly.
Click to expand...
Click to collapse
This answer = winning. Best answer ever.
Sent from my Nexus S 4G using xda premium
Thank you Harbb for your answer. You always give insightful answers backed up with reasoning.
If you wanted to know, this is the Dock Clock app I was using:
https://play.google.com/store/apps/details?id=com.gadgetjuice.dockclock
It allows me to set the background fully black with white text for the clock. Periodically it also shifts position to avoid screen burn in. In addition It allows you to set the brightness to 10% when plugged!
But it's better safe than sorry I suppose.
Always welcome Aero
AeroEchelon said:
Thank you Harbb for your answer. You always give insightful answers backed up with reasoning.
If you wanted to know, this is the Dock Clock app I was using:
https://play.google.com/store/apps/details?id=com.gadgetjuice.dockclock
It allows me to set the background fully black with white text for the clock. Periodically it also shifts position to avoid screen burn in. In addition It allows you to set the brightness to 10% when plugged!
But it's better safe than sorry I suppose.
Click to expand...
Click to collapse
Aside from being able to adjust text color, the original desk clock built into ICS does the same. Moves around and allows you to dim quite substantially.
Sent from my Nexus S using Tapatalk
uansari1 said:
Aside from being able to adjust text color, the original desk clock built into ICS does the same. Moves around and allows you to dim quite substantially.
Sent from my Nexus S using Tapatalk
Click to expand...
Click to collapse
True, I was using it before hand except I didn't like the ICS blue when dimmed. This one remains white and shows the weather/date too.

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

As it seems there are a few threads on auto brightness and color issues, i figure i should do the best i can to explain how it works on the S4, and mobiles in general. I work in Television/Film and have been shooting for almost a decade.
ANY QUESTIONS, feel free to PM me, i'll probably ask for very specific photo's (ISO/WB and other data) so i can help you in a professional manner, and i'll try to reply within 6-8 hours. No one should live with a bum screen!
To fully understand what im trying to express, load the attached image onto your phone, and on a bright sunny afternoon, print out the attached image on a small piece of decent photo paper, grab your phone, and find a room in your house that has only fluorescent lights and close any windows or shutters.
Look at the photo in the sunlight; note the colors. Now go inside to the fluorescent dark room, note the change in what the colors look like, and that white is still pretty white (thats your brain), then turn your camera flashlight on (LED), and note the changes in color again (some reds may look purplish or greens bluish), but white still looks kinda white (should look very light blue). Now repeat and look at the print out versus the same image on your phone screen; it should match best under 6500k lighting, but still be off (thats a printed image vs monitor thing though). Also depends on your printer ink type (dye/pigment), color space, etc etc etc. Your eyes take raw data in, but your brain does the magic, and says 'nope, thats white', so you perceive it as 'white' or 'white enough' and you 'know' it is meant to 'represent' white.
Hardware - This includes an ambient light sensor. The way these work is similar to metering systems in cameras; they measure the amount of light hitting a photodiode. Even in high end (DSLR) cameras, sometimes the light meters are junk. On cell phones, they are typically pretty crappy. The iPhone 5's have excellent ALS (ambient light sensors) and they ramp up/down smoothly; much better than any other device i've used.
The way the ALS works in most devices is simple; there are several photodiodes, each tuned for a specific spectrum of light. Say two for 3200k, two for 6500k, two for whatever else, etc, and they basically average the reading, apply a curve, and adjust the screen appropriately. They do NOT accurately measure color temperature very well, and 'see' brightness only in limited spectrums, meaning their idea of what 'bright' and 'dim' is may be vastly different from the human eyes' perceived 'bright' or 'dim'. Also, the 'curves' applied don't match up that well with how the human eye perceives brightness; its really amazing we can fake it as close as we can, really, but most of the magic lies in your brain.
Lighting - this is kind of tricky; and i don't feel like getting into it too deeply, but what you perceive as 'white' is mostly dependent on your brain; not your eyes or the lights around you. Think about reading a book (a real book) inside a library under fluorescent lights; the pages are white, even though the color temperature might be 5000k or 6500k. Now that same book outside; thats 5800k. Now under some old incandescent lights; that might be 2800k. Yet you know it SHOULD be white. Thats your brain. And thats reflected light; its based on the ambient color temperature around you; so reflected light 'looks' white or blue or whatever.
Your phone screen (galaxy S IV) is basically white balanced at 6600k , so it will appear most white when around lighting around 6500k, which is on the bluer side of daylight/cloudy and indoors.
Screen Mode - The Galaxy S IV has a feature that allows it to dynamically change based on the ALS, or can be overridden by the user, which mostly affects color gamut, and either amps up contrast and saturation while shifting hues slightly, or flattens them to a more realistic (usually most people prefer high saturation/high contrast images) image.
Sampling frequency - i have no idea what the ALS sensor samples at, or any definitive specs on the exact sensor and how it interacts with auto brightness, its priority, etc (yet, ive emailed Samsung and i wouldn't mind coming up with a simple app to adjust this if i can figure out the sensor specs and their software). But certain lights (fluorescent mostly) flicker at either 50hz or 60hz depending on their AC current, which may, at times, interfere or give bad readings to the ALS depending on the ALS sensor reading timings (again i do not know exactly what those values are, i suspect they are long as my S III and S IV typically react about a half-second behind lighting changes).
DETERMINING IF YOU HAVE A BAD DISPLAY
All together, it works pretty darn good, if a bit slowly, but there seems to be a lot of confusion and people wondering if their screen is bad. The BEST and EASIEST way is to go to any cell store or mall, and compare YOUR screen and the SAME image to another S IV, with the same settings. The best settings for this are to turn power saving OFF, turn off ALL power saving apps, turn auto brightness OFF, turn brightness up ALL THE WAY, go to 'settings', 'display', 'screen mode', and change the setting to 'movie'. Compare several IDENTICAL images or pages. Then change the 'screen mode' to 'standard' and compare the same images.
While doing so, be sure to check out images such as the one i provided and make sure the colors match, grays are grays or at least the same slight caste of pink/green/etc, and while doing so, TILT THE SCREENS at various angles together (level surface, side by side, tilt to 45 degrees at the same time on all 4 axes), and look for discoloration or bleeding; if you see big differences between two or three other phones and yours, you got a bum screen. I haven't seen a 'bad' one yet, and i made the poor AT&T guy open up five of them and let me play with them (AMOLED also has jet black splotches with full blacks in a fully black room; i wanted the screen with the least noticeable splotches).
Thanks for this. Question though. When I pull my keyboard up to type on something or if I'm in a YouTube video and I tap the screen to bring up the progress bar the color shifts dramatically. I've tried many settings and it always does this. Also tried it on another s4 multiple ones did the same thing...
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
Just hoping for a fix for it
The white balance can actually be calibrated by changing the calibration levels of the LEDs sitting under the screen
Lets hope for the best
jetlitheone said:
Thanks for this. Question though. When I pull my keyboard up to type on something or if I'm in a YouTube video and I tap the screen to bring up the progress bar the color shifts dramatically. I've tried many settings and it always does this. Also tried it on another s4 multiple ones did the same thing...
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
Click to expand...
Click to collapse
ok, do me a favor, I would prefer if you had either a prosumer camera you could use, or better yet a DSLR you could borrow that i could guide you through how to take two shots of the differences with all the important variables locked down so i can figure it out for you. I believe the screenshot feature ignores the 'Screen Mode' settings, as it should (you wouldnt want a screen mode dictating recording colorimetry options), so it does require real photos to figure out.
Have you changed the standard 'Screen Mode' setting or left it at 'Adapt Display' or 'Dynamic'? Those will keep changing it; Professional photo and movie are more flat, but they do not change. Again disable power saving mode, power saving apps, turn off auto brightness, (in this case set brightness to where you want it) and check it out again; if it doesnt change colors, (which it should not), you have no issues; its a normal 'feature' of the device. The idea is to limit all variables. Try that and PM me the results. If the colors no longer shift, the issue was 'adapt display' or 'dynamic' Screen Modes. Auto brightness/powersaving mode/power saving apps should only affect brightness; we are only disabling them to limit perceived changes.
To try to trouble shoot this, change screen mode to a static setting like 'professional photo' or 'movie' in Screen Mode and turn off auto brightness, turn off power saving and turn off all power/battery saving apps/etc, bring up a Youtube video and play it, then bring up your keyboard and see if the color shifts (it shouldnt if you have changed Screen Mode to Pro Photo/Movie and disabled powersave/all battery apps/auto brightness). Then let me know if that fixes it via PM.
rapaholic999 said:
Just hoping for a fix for it
The white balance can actually be calibrated by changing the calibration levels of the LEDs sitting under the screen
Lets hope for the best
Click to expand...
Click to collapse
problem is most calibration settings/programs and methods i know of are non-pentile and are mostly software fixes for what ive used; AMOLED is different PenTile (RGBG) than what i tried to fix before which was Motorola Atrix 4G PenTile (RGBW, red green blue white), CCFL LCD is way different (more what im used to, as well as LED LCD and even IPS is easier as it is still RGB), and all the curves software etc are all proprietary to manufacturers. Granted controlling just the R/G/B/G LED's would help, but getting the curve right and correcting might take longer than the Galaxy S V arrival. I spent months calibrating all my gear; most of it is 2-3 years old, and at least 6-12 months old before i get it all settled and can rely on it for a given job. Usually i rely on calibrated displays, knowing my own color limitations, RGB histograms, vector scopes, etc (i have a very slight red/green color weakness, but extremely sharp vision and i know how to work around my limitations).
I actually emailed Samsung about this for as much information as i could get (not much so far but im digging). I have a friend playing with LUT curves on his S IV and he says its a close second to the iPhone screens for AdobeRGB in 'movie' mode, which i happen to agree with; its pretty flat, but the contrast on greens is still high, which again is a PenTile RGBG specific issue; we are both vets of backlit RGB panels. My friend also works with the same company i consult/represent; it took him almost three months to properly calibrate LUT curves between a single sensor and a simple 480P CCFL LCD display, and that was with full manufacturer support. Colorimetry is a science.
jetlitheone said:
When I pull my keyboard up to type on something or if I'm in a YouTube video and I tap the screen to bring up the progress bar the color shifts dramatically. I've tried many settings and it always does this.
Click to expand...
Click to collapse
Same here. Thanks for the write up but I'm seeing the same thing.
I dim the display with the Screen Filter app for reading in bed and whenever my keyboard pops up (SwiftKey, TouchPal or stock) the entire screen gets a green cast. Under these conditions it is very dramatic.
I use manual brightness and turned off the Autoadjust Screen Tone setting
Some other apps exhibit a fluctuation in color cast when I put my finger near the screen which is double weird. :-\
-darren
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
Yes it's weird I don't know what's happening. Anyways I'd toy turn the brightness up past half way the color cast goes away. .. Not sure what it is
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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
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
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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
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?

[Q] screen causes neausea

I purchased a Nexus 5 within the past month. I love the ease of use and general setup, and although I selected red online, the phone itself is caution orange - but I quite like it as it's easy to find.
However, the screen makes me incredibly nauseous within minutes of use. I have tried dimming the lights and increasing the font size, but it does not make a difference. The screen itself makes me incredibly sick. After searching online, I learned that others have experienced the same symptoms after using certain Android phones. Why is this happening? I presume it is related to the LCD screen. Thanks...this phone was expensive.
I had the same problem but for me it was mostly after some intense gaming. I guess I just got used to it after a while cause it does not happen anymore. Some times it was so bad I thought I was gonna throw up.
Just wear sun glasses when Flashing and you will be cured!
Hard to say what's going on. My first guess is that it's the refresh rate on the screen.
Screen makes u nauseatic?
Flash makes u celebrity
Maybe its the animal porn you're watching? ?
But seriously, maybe flash a kernel with colour control and change the gamma values?
dgreenfi said:
I purchased a Nexus 5 within the past month. I love the ease of use and general setup, and although I selected red online, the phone itself is caution orange - but I quite like it as it's easy to find.
However, the screen makes me incredibly nauseous within minutes of use. I have tried dimming the lights and increasing the font size, but it does not make a difference. The screen itself makes me incredibly sick. After searching online, I learned that others have experienced the same symptoms after using certain Android phones. Why is this happening? I presume it is related to the LCD screen. Thanks...this phone was expensive.
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Are you using any screen protectors?
I have got this before, but that was switching from LCD to Amoled phones. Nexus 5 is LCD so there shouldn't be a problem.
If I use the matte type of screen protectors where colors are distorted, then the screen will actually make me dizzy.
I think it could happen with any phone, though bigger screens probably don't help. From what I can tell its usually caused by the difference between your eyes looking at the screen and your peripheral vision seeing everything around and behind your phone. I know some people who feel nauseous when using any 3"+ screen mobile and moving, so walking or in a vehicle even.
If that's the case you might be able to mitigate the issue by holding the screen closer to your face, but I don't think it's anything Android specific. Certainly not Nexus 5 specific.
It was big news when iOS7 launched. The culprit were the animations. Maybe reducing animations scale to .5x or .25x would help.

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