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with super amoled, if you use a black bg those pixels are just shut off and can save you some battery life. But the SLCD isn't as easy to see in the sunlight and i was curious if there is a difference in battery juice consumption with a white bg. Even black has to be luminated by the screen, not shut off pixels like S-AMOLED. Is there a difference between black n white on SLCD's battery drain?
I'm looking for a more technical answer with reasoning rather than "just try em both and find out".
White would be easier to see in sunlight without having to turn up the brightness past 25%.
Please don't quote me on this but I believe the difference in battery usage would be very negligible. It does take less power to display a black LCD screen than a white one but not enough to provide any noticeable difference in battery life like it does on AMOLED devices.
connerrs said:
Please don't quote me on this but I believe the difference in battery usage would be very negligible. It does take less power to display a black LCD screen than a white one but not enough to provide any noticeable difference in battery life like it does on AMOLED devices.
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Thanks. I did just remember about a cyanogenmod setting to filter the color of the screen and it quote "potential battery saver". Im not sayin battery life is an issue, just curious on knowing the differences in power consumption by color. But like u said, its probably very minimal tho. My 2 past devices were S-AMOLED and I didn't bother with predominantly white backgrounds because it actually made a difference. Time to be able to enjoy the entire spectrum on SLCD without worry! Haha one of the few benefits of LCD
Sent from my PG86100 using XDA Premium App
I think it might use more power on LCD screens. Or, at least, I remember reading that. However, back on my Hero, I tried the effect and it seemed to use the CPU more to render the effect. The phone got slower while in red, blue, etc. I think it is really only for AMOLED screens. Phones using that type of screen benefit a lot more. But I am most likely wrong. It has been a long time since I read up on this tweak.
Sent from my iPhone with the bigger GeeBees.
notasimpleway said:
I think it might use more power on LCD screens. Or, at least, I remember reading that. However, back on my Hero, I tried the effect and it seemed to use the CPU more to render the effect. The phone got slower while in red, blue, etc. I think it is really only for AMOLED screens. Phones using that type of screen benefit a lot more. But I am most likely wrong. It has been a long time since I read up on this tweak.
Sent from my iPhone with the bigger GeeBees.
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that sucks that the phone becomes sluggish, but then again it was the hero which is 1/4 the phone the 3D is...
also, i'm trying to make sense of it being for AMOLED screens, cuz the pixels are individual LEDs (or so i think) which are on/off individually. but LCD is Liquid.Crystal.Display, which to me makes more sense to render the entire display a certain color... i dunno, probably talking outta my a$$ but hopefully someone with a definite answer can chime in..
thanks for all the info & opinions from you guys, i feel we're getting closer
Does anyone know if there is a way to adjust the display's color saturation and color balance? While the screen is eye popping to look at, the colors are not accurate. They are distinctly warm and oversaturated. This is great for looking at icons, but not so great for photographs. I know the international Galaxy S II has something called "background effect" where this can be set to 3 presets with varying saturation levels. But this option is missing on the AT&T SGS2. I found an app called Screen Adjuster in the market, but that only lets you increase saturation or change color balance by increasing the intensity of the Red, Green, or Blue values. There's no way to turn them down.
So has anyone figured out a way to adjust this? Thanks.
bump. also hoping to find a solution for this but not having any luck yet
+1 on this.. I am a professional photographer and I used to use my I4 to present my portfolio. As of today I can't do that, or I have to do re-do my portfolio specifically for the SGS2's display. Which I really don't wanna do.
"app called Screen Adjuster in the market"
Thanks for this! At least with that the color temp is somewhat fixable, but overall colors are still terrible. As long as Samsung insists on locking these devices into torch mode we're just screwed. It's a shame that this didn't ship with several selectable profiles like the regular version (although I never seen it so dunno how good that implementation is.)
Working on hardware calibrated monitors all day and then looking at this phone is a bit jarring.
lolzerlol said:
"app called Screen Adjuster in the market"
Thanks for this! At least with that the color temp is somewhat fixable, but overall colors are still terrible. As long as Samsung insists on locking these devices into torch mode we're just screwed. It's a shame that this didn't ship with several selectable profiles like the regular version (although I never seen it so dunno how good that implementation is.)
Working on hardware calibrated monitors all day and then looking at this phone is a bit jarring.
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I totally agree! My wife's iphone 4 looks way better with photographs. To me, photos on this phone look cartoonish.
LOL cartoonish
Sent from my SAMSUNG-SGH-I777 using xda premium
This would be great. Caartoonish is exactly what it it. However, we need to keep in mind these displays are far from professional grade. I won't argue that some software could help bring a small level of 'professionalism', however.
I just read around the web that the international version of this phone has Settings, Display, Background Effects to calibrate?
------------------------------
Well I checked out Screen Adjuster and it has the ability to change R,G,B values along with the brightness and Contrast ... so that's enough to for me to use me Eye-One Pro to calibrate the screen. I just need to put grayscale and R,G,B targets to the phone.
This should work just fine
can you post your settings when you calibrate it?
I also found this
Calibration Hack for Nexus One
Which I am now using. Since it has the grayscale bar built in. But this one requires Root access as you need to put the apk in to the /system/app.
mbze430 said:
I also found this
Calibration Hack for Nexus One
Which I am now using. Since it has the grayscale bar built in. But this one requires Root access as you need to put the apk in to the /system/app.
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Great find! Do you know if CM7 is a requirement for this? This may be the best option for color correcting the display.
I just realized that with Screen Adjuster, you can change the color balance by adjusting the relative values of RGB, then turn the Brightness down to compensate for the elevated brightness levels. Without turning down the Brightness, the black pixels are no longer black. So it's a pretty decent solution.
Just got Screen Adjuster, are there any recommendations for "optimal settings?"
devorama said:
Does anyone know if there is a way to adjust the display's color saturation and color balance? While the screen is eye popping to look at, the colors are not accurate. They are distinctly warm and oversaturated. This is great for looking at icons, but not so great for photographs. I know the international Galaxy S II has something called "background effect" where this can be set to 3 presets with varying saturation levels. But this option is missing on the AT&T SGS2. I found an app called Screen Adjuster in the market, but that only lets you increase saturation or change color balance by increasing the intensity of the Red, Green, or Blue values. There's no way to turn them down.
So has anyone figured out a way to adjust this? Thanks.
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I'll look into this - I'm surprised you find yours too warm, I think my phone is a little on the cool side - without a doubt bluer than my Infuse.
If it's supported by the I9100, I can probably find the relevant kernel interface.
Dranakin said:
Just got Screen Adjuster, are there any recommendations for "optimal settings?"
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+1
Sent from my SAMSUNG-SGH-I777 using XDA App
Problem is... just like calibrating a TV/Monitor is that it doesn't have High Bias and Low Bias R,G,B. High Bias changes the whites and Low bias changes the black.
Also, unless you plan on using your display at a constant brightness level, you will get color shift in the lower end of the spectrum
For what I have done is create an 18% gray jpg and a 82% gray as well as a 50% gray.
ON MY display the whites is on the warm side... but there is nothing one can do about it, because the apps just don't have those value to change
ON MY display the blacks are also very warm...
I WAS able to use my i1Pro (spectrophotometer, unlike the cheap colormeter) to get it pretty damn close to 6500k in the Black and Mid-tone.... again nothing one can do in the whites.
I am 90% happy with the results (I'm anal, but I can't do anything with the whites!)
My settings might get you close to 6500k (most likely not.. because ever display is different, and from what I see here some are too warm/cold..etc).. My settings are to use with Calibration from the Nexus One thread, and they are set up to have a warm mid-tone
Red: 627, Green: 623, Blue: 665
Mind you that I also am using CM's 7.1 with the brightness custom level set to my likings...
But it's night and day difference (if you are looking for realistic color representation). A lot of untrained eyes like the eye popping colors, while a calibrated display is much more subdued.
mbze430 said:
... My settings are to use with Calibration from the Nexus One thread, and they are set up to have a warm mid-tone
Red: 627, Green: 623, Blue: 665
Mind you that I also am using CM's 7.1 with the brightness custom level set to my likings...
But it's night and day difference (if you are looking for realistic color representation). A lot of untrained eyes like the eye popping colors, while a calibrated display is much more subdued.
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I keep getting a force close after I install the apk. What version did you use? The app installs fine and will open but when I try to adjust RGB, I get the forced close. Thank you!
While using my Tablet throughout the last month, one thing has really been bugging me. The screen seems to be very yellow. Rather than showing white screens as white, they're off-white, greys look a bit darker and greener than they should. The color temperature of the screen is very warm, and it bugs me. Anyone else experience this? Or do I just have a bad screen?
Better question, does anyone know of a fix for this? I'm hoping it's not a hardware problem, but a software one.
Try taking a screenshot ("n" + volume down) of this and let us look at it. I'm guessing if its yellow to us as well, its s software issue. If not, its likely a hardware issue.
Judging by your screen temp, early guess its a hardware problem, but lets see what the screencap shows.
Sent from my Nook Tablet using (((sonicboom)))
There is app called Screen Adjuster that you can grab from the market. It will allow you to change the color of the screen. I use it for night reading tobreduce the blue.
Just remember to disable it when installing apps. Otherwise the install button will be disabled.
Alright, so I grabbed a screenshot and sent it to my Droid X, which has a totally neutral color warmth, and the shot looked perfect. That's a little depressing, but still, something tells me that it has to do with the stock B&N, cause I know Google did something like this with the Nexus S for "enhanced contrast" or something like that.
I know this is probably wishful thinking, but I'd still like to believe there's a way to fix this.
Also, I tried Screen Adjuster, but it doesn't seem to fix the problem. It seems to just put a filter over the screen.
There was a thread about the color temprature early on in the life of this forum. The OP is a professional photographer and was bothered by the color balance of the NT: http://forum.xda-developers.com/showthread.php?t=1354639&highlight=warm .
conundrum768 said:
There was a thread about the color temprature early on in the life of this forum. The OP is a professional photographer and was bothered by the color balance of the NT: http://forum.xda-developers.com/showthread.php?t=1354639&highlight=warm .
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Touche. I did try the fix listed in there, but it didn't work (for a number of reasons). The problem has essentially been ignored since then, so I'm assuming either it doesn't bother that many people, or I have a defective unit. That's why I'm asking if anyone else notices it.
Though now this thread does seem redundant..
Seems the NT is a bit more yellow than standard.
http://www.displaymate.com/IPS_Tablet_ShootOut_1.htm
The Nook Tablet also has a very good factory display calibration. Its gray-scale is actually more accurate than most living room HDTVs. The White Point at 6,016K degrees is somewhat more yellowish than the 6,500K standard – that was most likely done in order to increase the screen’s maximum brightness, power efficiency, and battery run-time.
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Is there any way to remove the horrible post processing for the screen that makes everything so oversaturated and crushes the colours, shadows and shading?
I have changed the colour mode to "natural" from the "le eco" default but it is still way over saturated and not at all correct. Reds in particular are very oversaturated, although it seems to happen with all colours to a degree. The other colour modes are even worse.
Is there seriously no way to remove this? Or is it part of the firmware for the screen rather than part of the phone software itself?
It's an extremely stupid decision to post process and alter colours and have no way of turning it off.
I am on the default x829 fw: 5.8.016S if that makes any difference.
Also have the same issue.
I also have this over saturation issue on my x829 running stock 16s software. I cannot find a way of solving it as you seem to be the only other person I've found suffering from this issue.
I think it's just the kind of issue that most people don't notice (or worse, think it looks "better"). Certain content makes it really obvious and it loses a lot of detail.
Seems like a conscious choice so I doubt it's something that will be different in the other roms but as I haven't tried any other roms i don't know.
I hope it's done in software rather than the screen firmware, so that it can possibly be more easily disabled (corrected) in cfw.
Mine looked oversaturated with the reds too.
Your cases may be more complicated but mine turned out to be an oversight on my part of not clicking OK (at the top right of the screen) after selecting the desired color mode. Changes would't stick without clicking OK.
System: Indian 19s.
Thanks for trying to help!
Unfortunately I already did that and am already correctly in the "natural" mode - it certainly helps a bit compared to the Le Eco mode but is still too saturated and the gamma is too high. All the contrast is way overblown which ruins subtlety in shading.
I am getting loads of black crush which is the most irritating part.
Can people test here:
http://www.lagom.nl/lcd-test/black.php
I can only see down to 20 on normal brightness settings.
If i turn the brightness all the way up (with adaptive brightness off) then the screen is utterly blinding and i can still only see down to about 9 or 8.
http://www.lagom.nl/lcd-test/gamma_calibration.php
The gamma is messed up too, i'm getting about 1.3 / 1.4 at 48%, 1.6 at 25% and 1.8 / 1.9 at 10%
As you can imagine it really is spoiling the phone.
nougat ROMs have KCAL app support, atleast Omni does... have you tried it?
I thought KCAL didn't support the snapdragon 820? At least it doesn't list MSM 8996 support??
https://forum.xda-developers.com/android/software-hacking/dev-kcal-advanced-color-control-t3032080
That would be great if I could use KCAL. However I am nervous of using Nougat roms as I heard that they break the camera and other features on the phone?
In fact I have not changed from stock firmware as I have been unsure what is the most compatible thing to change to.
I don't care about breaking the fingerprint sensor though, as I never want to use that.
Hello did u solve ur problem.. Im facing the same
No, i didn't yet, sorry.
I posted about it in the small eui thread but no one seemed to pay attention. I will probably make a thread about it to bring it to people's attention as i am guessing it affects everyone's phones.
Just install kernel auditor on Omni or any rom that supports kcal. I reduced saturation to 20 and looks much better.
What is kernel auditor for if omnirom has kcal already? :S
The thing is i would prefer to keep on an eui based rom, like small eui or cuoco92 so that i don't break anything on my phone.
But if it is really not possible to fix with those then I will move to something like omni-rom. I just don't want to break phone functionality.
Also, the biggest problem is the black crush rather than the gamma - check the link i posted and see which squares you can see down to - it's really bad! Hopefully this can be fixed with kcal too...
Hola!
OK, at some point I will finally update the calib.cfg file again. But for now here are the settings I am using with a KCAL enabled kernel to remove ghosting from my screen as well as drasically improve contrast and colors.
I use Kernel Adiutor:
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Under 'screen' section >
Screen Color (This kills the ghosting a lot of users are experiencing as well as removes the blue tinge the screen has):
Red = 250
Green = 250
Blue = 235
Minimum RGB value = 35
Saturation Intensity = 27
Screen Hue = 1520
Screen Value = 112
Screen Contrast = 132
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I have been running it for awhile and it looks fantastic and I have not had anymore ghosting. It also makes the screen look similar to my Note Edge when I first got it. Contrast is improved a LOT. Colors are better. They are not over saturated. Very close to natural. Whites are white and not blue (at least on my display) etc.
Please let me know your results.
-helf
Works good here!
any way to change these values without root as I updated to the new tmobile update and atm there is no root method
dudeawsome said:
any way to change these values without root as I updated to the new tmobile update and atm there is no root method
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I don't think so, no. These require a kernel with KCAL integrated. You can kinda adjust the screen values without root by going into settings > general > accessibility > vision > screen color adjustment > manual
But that's about the best you can do beyond nonroot screen filter overlay like cflumens supports etc
Thanks Helf. with this tweak, the display looks great!
by ghosting you mean image retention right? if that is the case, well this is awesome! Thanks
A little bit over 15 hrs and no ghosting. My only beef is how the blues look but it's a good configuration overall, easy on the eyes.
Paapa said:
A little bit over 15 hrs and no ghosting. My only beef is how the blues look but it's a good configuration overall, easy on the eyes.
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How do the blues look? I need to put the phone with a color calibrator and check it. Mine look pretty close to natural when I eye ball it. I'll keep working on it
helf said:
How do the blues look? I need to put the phone with a color calibrator and check it. Mine look pretty close to natural when I eye ball it. I'll keep working on it
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You're doing a great service for us all. Blue's and greens come off slightly dull like they could use a little saturation but if it's at the cost of prevent the ghosting effect i understand.
Paapa said:
You're doing a great service for us all. Blue's and greens come off slightly dull like they could use a little saturation but if it's at the cost of prevent the ghosting effect i understand.
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hm. The colors in general are probably a little duller. The vibrancy and contrast and all is usually cranked up on phones Samsung is especially awful about it. People like the 'pop' though. I just compared several shades of blue and greens with the screen at max brightness using the camera app, the colors are almost dead on to my eyes. Granted i have to manually drop the ISO a couple notches because the phone wants to automatically crank it too high (like true-to-life brightness/colors around my work desk it wants to use an ISO of 600 and ISO 200 was real world accurate. heh).
helf said:
How do the blues look? I need to put the phone with a color calibrator and check it. Mine look pretty close to natural when I eye ball it. I'll keep working on it
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You have spectrophotometer? I would love to see some values to use, but wouldn't it be different between devices? No panel is exactly the same, or?
I seem to remember that being reiterated quite a lot on various display discussions I've followed in the past.
askermk2000 said:
You have spectrophotometer? I would love to see some values to use, but wouldn't it be different between devices? No panel is exactly the same, or?
I seem to remember that being reiterated quite a lot on various display discussions I've followed in the past.[/QUOTES]
Yeah. I don't have a fancy one. It's old but works lol.
There is a variance between panels but it's not as severe as it has been in the past.
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Been trying these settings for a while, personally I really like them. Thanks Op!
Anyone else have any settings to try?
Do you use these settings along with Comfort View? Or do you leave the Comfort View setting turned off?
Sent from my LG V20 using XDA Labs
askermk2000 said:
You have spectrophotometer? I would love to see some values to use, but wouldn't it be different between devices? No panel is exactly the same, or?
I seem to remember that being reiterated quite a lot on various display discussions I've followed in the past.
Click to expand...
Click to collapse
rick09 said:
Do you use these settings along with Comfort View? Or do you leave the Comfort View setting turned off?
Sent from my LG V20 using XDA Labs
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I use it with CF.lumen.
I don't use comfort view. If you enable it with my settings on you'll have a really yellow display.
Be sweet if there was a way to get kcal with stock kernel. I do get the image retention on mine pretty bad sometimes
KUSOsan said:
Be sweet if there was a way to get kcal with stock kernel. I do get the image retention on mine pretty bad sometimes
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Try this out : https://forum.xda-developers.com/g4...d-configure-post-processing-settings-t3165247
I haven't yet. I am curious if it'll work.
Just tried on h918 it doesn't work.
helf said:
Try this out : https://forum.xda-developers.com/g4...d-configure-post-processing-settings-t3165247
I haven't yet. I am curious if it'll work.
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Just tried it as well on H918 running WETA with stock kernel and it installed and activated properly but nothing changed. Tried a few different configs and reboots just to see but nothing. Thanks for the share though. It'd be just what I'm looking for if can get to work
Is there any chance applying these changes would cause auto brightness to stop working? Possibly it's coincidence, but I changed my screen settings to exactly how it was in the OP, and since then I've noticed auto brightness no longer works on my phone? I don't see how making these changes would cause that but I figured I'd ask here to be sure, or to see if anyone else has the same problem.
Sent from my LG V20 using XDA Labs