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Here is the Nexus 10 Pre Calibration Results.
no post calibration due to lack of adjustments right now,so its not much to do than accept it.
i try to explain the results here
first Gamma: average 2.21
that is reference class but the problem here is that the line isnt flat.
it should be straight at 2.2
around 2.0 at the darks and 2.4 in the whites
that isnt that bad that i thought it should be
i was more into that the gamma was way lower, around 1.5
if everyone complains about washed out blacks then they are close to reference.
so stop crying and enjoy details in the dark scenes
i think most other OLED screens have much higher gamma for the darks just to get a fake contrast boost.
the problem then is that you loose details in dark scenes and get crushed blacks.
on the Nexus 10 we dont loose any details.
Next Color temp: 6784 Kelvin is great.
6500 is reference so its just a little bit to the blue side
GrayScale: thats the one that makes white where it should be white
i must say that the grayscale is reference!
Great work Samsung!
the only part that sails away is IRE10 that has to much blue and red in it but then IRE 10 is almost black and you
will not see the colors.
Contrast
Blacklevel is great at 25% brightness on the Nexsus 10
with that brightness(Y: 130= recommended brightness for LCD TVs) you get a contrast ratio of 814:1
average i must say but not bad
with higher brightness you loose blacklevel.
(i also measured the Contrast ratio at 50% brightness and its the same around 800:1
blacklevel at 50% brightness is higher Y: 0.300)
and so to the worst
Color Inaccuracy!
Bad Bad Work Samsung
the calibrator must have slept during the process
not much to say that blue isnt blue on the Nexus 10
165%!! to high brightness and to low saturation
the only colors that is close to reference is CYAN followed by YELLOW and RED.
the others has to low saturation.
Note: the White Dot in the middle is our Whites
and with the reference class grayscale that dot is almost in the box.
its the white dot that controls all other colors so if that is off all colors is off.
but that doenst make any sense here.
the colors should be better but they are not.
i think the main problem here is the Colour Gamut itself.
samsung have choosen the wrong colour gamut for the Nexus 10.
so the conclusion is that Gamma level isnt as bad as everyone thought
the bad thing here is the colors with its low saturation and wrong brightness.
A new "Wider" colour gamut can make this display world class.
Edit: to the Developers that searching for a gamma adjustment you can stop doing that
The Gamma Curve isnt the main problem.
if we are lucky samsung has several different colour gamuts hidden somewhere.
so thats what you should look for.
on my LED tv i have 5 different colour gamuts to choose from and they all get different CIE scores.
if there are several Gamuts hidden they should be named "Wide" "Standard" "EBU" "SMPTE" "BT709"
Edit2: or you could search for "Adobe RGB"
thats one gamut that should have been on the Nexus 10 from start.
Nexus 10 cant even use the full sRGB colorspace,we only get 75% of sRGB it and that is really bad.
i was just checking the colors on my Galaxy S2 and it uses the full Adobe RGB colors.
thats why all colors looks so vivid on most OLED screens
they are calibrated to the wider Adobe RGB Gamut.
info on all colorspaces used:
http://thehdrimage.com/color-managment-and-monitor-calibration/
you can see that you get way more colors with the Adobe RGB compared to the standard sRGB
Awesome, thank you
Sent from my Nexus 10 using xda premium
Great job!!
Despite gamma is well calibrated, colours look aweful. We really need that colour management. Lets hope Franco or any other dev can find the way for this.
Sent from my Nexus 10 using xda app-developers app
Straf said:
Great job!!
Despite gamma is well calibrated, colours look aweful. We really need that colour management. Lets hope Franco or any other dev can find the way for this.
Sent from my Nexus 10 using xda app-developers app
Click to expand...
Click to collapse
Thanks!
yes lets hope so
it should atleast be able to display the whole sRGB colorspace.
Patrik G said:
Thanks!
yes lets hope so
it should atleast be able to display the whole sRGB colorspace.
Click to expand...
Click to collapse
Interesting, do you know what's the color gamut on the iPad? And I thought you were working with Franco to calibrate it, was I wrong? If not how's that going?
Edit: Never mind, I found the one of the iPad
Fidelator said:
Interesting, do you know what's the color gamut on the iPad? And I thought you were working with Franco to calibrate it, was I wrong? If not how's that going?
Edit: Never mind, I found the one of the iPad
Click to expand...
Click to collapse
what gamut does the iPad use?
not working but as i got the tools i can do tests if someone comes up to something.
even if you got saturation controls you need a colormeter to get it right.
Patrik G said:
what gamut does iPad use?
not working but as i got the tools i can do tests if someone comes up to something.
even if you got saturation controls you need a colormeter to get it right.
Click to expand...
Click to collapse
It has 95% of the sRGB gamut.
diff colors on diff models
I'm not sure if anyone has noticed this before, but I've had 3 different Nexus 10 models (with a 4th on the way; RMA) and I've noticed different color. 1 seemed very warm and whites looked silver-esque, and the others seemed picture perfect (to me). Too bad that I had to return the ones with good color because of other defects. Hopefully my next will have no issues, but if it doesn't, it will be my last.
newcombrs said:
1 seemed very warm and whites looked silver-esque,
Click to expand...
Click to collapse
it could be lightbleed that causes that.
the color from the lightbleed seems to be yellow so if you have alot of lightbleed you will get a yellow tone in the whites.
Fidelator said:
It has 95% of the sRGB gamut.
Click to expand...
Click to collapse
you should have that % on the N10 aswell.
but to bad that the calibrator got drunk that day
the strange thing is that you can see a line in the CIE chart
Blue/Magenta/Red are on the exact same line.
its just like the Gamut was cut there and not where the boxes are.
i think i found something in the "fimc_is_fw.bin" file under system/vendor/firmware
"R_SatThresh" : "Gr_SatThresh" :
"BrightnessGain uSaturationGain sContrast sUserContrast sSharpBlur uNoiseInd ConstFitBitsVals ConstFit16Vals ConstFit8Vals"
that looks like 8bit and 16bit colors
we want 16bit so why has it a setting for 8bit?
"usSatThrStrong usSatThrMild usSaturatedScene usSatSceneMinClipPix "
what the hell is this ?
is there different saturations for strong/mild/scene ?
and what adjusts those?
and is there a way to control those settings?
Edit: also found under fimc_is_fw2.bin
gamutLowY12 gamutHighY12
also
wLargeGamut wSmallGamut
gamut large/gamut small ?
yeah thats right
we have a small gamut right now
change it to "wLargeGamut" and maybe we will have correct colors
so many options but so few that can be accessed
question is what controls those?
and why is there different options for those?
questions goes to the Kernel hackers.
GO!
make adjustments options for those above
Patrik G said:
i think i found something in the "fimc_is_fw.bin" file under system/vendor/firmware
"R_SatThresh" : "Gr_SatThresh" :
"BrightnessGain uSaturationGain sContrast sUserContrast sSharpBlur uNoiseInd ConstFitBitsVals ConstFit16Vals ConstFit8Vals"
that looks like 8bit and 16bit colors
we want 16bit so why has it a setting for 8bit?
"usSatThrStrong usSatThrMild usSaturatedScene usSatSceneMinClipPix "
what the hell is this ?
is there different saturations for strong/mild/scene ?
and what adjusts those?
and is there a way to control those settings?
Edit: also found under fimc_is_fw2.bin
gamutLowY12 gamutHighY12
also
wLargeGamut wSmallGamut
gamut large/gamut small ?
yeah thats right
we have a small gamut right now
change it to "wLargeGamut" and maybe we will have correct colors
so many options but so few that can be accessed
question is what controls those?
and why is there different options for those?
questions goes to the Kernel hackers.
GO!
make adjustments options for those above
Click to expand...
Click to collapse
For people that build ROMs like myself, that file is called a "proprietary", which means it is a prebuilt file (in this case a binary) that ROMs have to use to make the device work properly. More than likely you will not be able to feed any values to it. About the only option would be to hexedit the file to see if it can be manipulated.
thanks for the answer ktoonsez
so you where aware of the file already
ktoonsez said:
About the only option would be to hexedit the file to see if it can be manipulated.
Click to expand...
Click to collapse
that i dont understand but give it a try!
Edit: cant you see what settings that is activated on the device and which is not?
Patrik G said:
thanks for the answer ktoonsez
so you where aware of the file already
that i dont understand but give it a try!
Click to expand...
Click to collapse
No problem, I was not aware of the file, just looked it up in my AOKP source and found it under prebuilt proprietary binaries. Maybe someone with more free time on there hands can try to hexedit it, I definetely don't, lol.
ktoonsez said:
No problem, I was not aware of the file, just looked it up in my AOKP source and found it under prebuilt proprietary binaries.
Click to expand...
Click to collapse
ok i found those values when i searched for "gamut" inside the files from the stock rom.
was using the program "seeker" on my PC
http://www.veign.com/application.php?appid=104
Great job so far guys. That .bin file sounds like the ticket. Hopefully the values can be easily modified.
Sent from my Nexus 10 using xda app-developers app
Patrik G said:
i think i found something in the "fimc_is_fw.bin" file under system/vendor/firmware ...
Click to expand...
Click to collapse
Patrik,
Nice find, I wonder if you discuss you findings with a developer you has already created color control capability on rooted devices including the Nexus 7, which we may speed this investigation.
Product: Faux123 Kernel Enhancement Pro
Playstore: https://play.google.com/store/apps/...GwsMSwyLDEsImNvbS50ZWFta2FuZy5mYXV4Y2xvY2siXQ
The developer invites direct contact at: [email protected]
Related XDA thread for his product(s): http://forum.xda-developers.com/showthread.php?p=34502852#post34502852
I hope this helps as I agree color calibration capabilities would be a major feature for many people who are willing to root.
i know who he is but he doesnt answer questions so i let it be
someone else can give him this info
This is kind of a big deal no? Surprised at the lack of interest.
Sent from my Galaxy Nexus using xda app-developers app
amdfanTO said:
This is kind of a big deal no? Surprised at the lack of interest.
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
I'm surprised too, I can't understand how the hell comes people are fine with this screen, I won't ever be completely happy with my Nexus unless this is fixed.
Related
I'm also the proud owner of a samsung galaxy s2. However, when it comes to new devices, everything i buy, i want to know if everything is correct!
Now i came across these pics on another forum i visit. But I appreciate this forum more(was only reading untill now), as I can see alot of the people are like me here. Exploring every little thing that could be wrong with the phone and not saying it's annoying to ask a lot of questions.
Now this is the problem i came across, haven't seen it anywhere else here, tough i read somewhere else abouth a blue-ish tint on the screen.
These next pictures have the same brightness, and all the same display settings too! So no lcd automatic power management(i don't know the right english word).
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As you can see here the right picture has slightly "harder" colours. But it seems like the left had more contrast. The yellow lines stay yellow on the left one, on the right it's orange allready.
Left one clearly blue ish shine.
Now as I hold my own phone in the same positions as the picture standpoints, i can see mine is also like the blue-ish one with whole white screens.
Can anybody check this on their phone, as I now am worrying wich one is the one Samsung intended it to be?
Also a little other question, does this "automatic screenpower adapting" also changes the whites more to grey on your phones? When i turned it off it changed alot.
I've also seen those pics on Tweakers and checked my screen but I don't see any blueish hue on my screen. However it's hard to check because I don't know how the "other" screen looks like in real life.
Most people won't be able to notice the blue-ish hint on their screens without having another non blueish screen for reference. But I've had 4 Galaxy S2's pass through my ownership, and all of them have this blue-ish tint.
drm111 said:
Most people won't be able to notice the blue-ish hint on their screens without having another non blueish screen for reference. But I've had 4 Galaxy S2's pass through my ownership, and all of them have this blue-ish tint.
Click to expand...
Click to collapse
Yeah i know, wouldn't have noticed it myself. But just by comparing my phone to the blue ish one, i could see mine was like the blue ish one immediatly.
The other one has more of the pink hue like more of the lcd screens is guess...
What causses the difference, is it just some little layer?
Do you think we can talk abouth one of them being broken?
very large keyboard which one is it .
One on the left looks like wrong display settings from the pictures .
But the pictures are not good enough to clarify .
jje
JJEgan said:
very large keyboard which one is it .
One on the left looks like wrong display settings from the pictures .
But the pictures are not good enough to clarify .
jje
Click to expand...
Click to collapse
I can tell you that, in real life, mine looks like like the blue-ish one from those angles. However when i look straight on to the phone it's not like that, it's pretty white, like the 3rd picture but without the blue in the left corner.
It's taken with a good camera.
It's not broken. I'm convinced it's a software problem. The colour temperature is set incorrectly, it's too 'cold'.
If you load up a video in the stock video player app, then go into the settings menu, and make a mental note of the white colour of the menu, then go into colour tone, and set it to 'warm', notice the menu now has a much more neutral white and isn't as blue? Unfortunately the colour tone settings set in the video player isn't saved for else where on the phone.
drm111 said:
It's not broken. I'm convinced it's a software problem. The colour temperature is set incorrectly, it's too 'cold'.
If you load up a video in the stock video player app, then go into the settings menu, and make a mental note of the white colour of the menu, then go into colour tone, and set it to 'warm', notice the menu now has a much more neutral white and isn't as blue? Unfortunately the colour tone settings set in the video player isn't saved for else where on the phone.
Click to expand...
Click to collapse
Thanks, but doesn't change much. It's just a sort of coating. When i just turn it to idle, and i reflect in in outdoor light, I can see some sort off the same blue ish hue on it... You can test it like this...
So very strange what it is...
Ah yeah I see.
Well my other theory is that due to the way AMOLED displays work, as we all know they die out over time, getting increasingly dull with age. But with AMOLEDs, blue pixels have a much shorter lifetime than the Red/Green pixels.
SO my theory is that either there is blue 'cast/coating' over the screen or that the blue pixels have simply much boosted 'intensity', so that over time as the blue pixels age quicker than the other pixels over time, this blue cast/coating/boosted intensity will mean that the blues will still match the other pixels as they age much slower.
Didn't Supercurio release a color fix in his Voodoo kernel for SGS ? I guess you'll need to wait for a similar fix for the SGS 2 series .
JJEgan said:
very large keyboard which one is it .
One on the left looks like wrong display settings from the pictures .
But the pictures are not good enough to clarify .
jje
Click to expand...
Click to collapse
Looks like Swype
/CK
Theres supposed to be a setting called Background Effect where you can choose between dynamic, standard and movie. Maybe thats the difference
erazer007 said:
Theres supposed to be a setting called Background Effect where you can choose between dynamic, standard and movie. Maybe thats the difference
Click to expand...
Click to collapse
I tried that personally, changing it from Standard to Movie helped the problem a fair bit, but it's still there. Dynamic didn't seem to make much difference.
Hmm. Could it be a software problem? Have you tried reflashing it? Or maybe its the problem with the Gorilla Glass.
Does anyone know if the phones in those comparison pictures are both retail? Maybe one is a proto
erazer007 said:
Hmm. Could it be a software problem? Have you tried reflashing it? Or maybe its the problem with the Gorilla Glass.
Does anyone know if the phones in those comparison pictures are both retail? Maybe one is a proto
Click to expand...
Click to collapse
Phones from a couple from holland. Posted on tweakers.net.
Anybody compared their phone from those viewing points? And see if the blue ish hue is visible?
Hmm it seems the difference is there. My phone is with my friend and his phone is less brighter than mine. This maybe because he has used his phone while mine is new.
Gutted...
I hadn't heard about this but my SGS2 is definitely Blue-ish compared to a white screen on my laptop LCD :-(
Can you take them back and get replaced on this? (I have also put a small but deep scratch in mine, so hoping this would be basis for a replacement)
boch501
Well I brought mine back to the store for a refund, it's just too annoying for me.
Especially when you put it to an angle. The screen of my galaxy s 1 is far superior in this respect
I will wait for a newer batch to see if the problems are solved. I do read very little about this problem, does that mean it's just a problem with few devices or most people just don't care/notice it?
Any news about not-blueish displays?
Is there any possibility to find a near white perfect display, or all display suffers of the same bluish issue? (yesterday I've checked a pair of samples here in Italy, and both were quite blu in my opinion)
I've read that blu oled pixel lifetime is lower than other colors, so Samsung could intentionally push blu pixel in order to compensate color balance in the long term.
Also Gorilla Glass is a bit bluish, so it could contribute to increase the overall blue dominant.
janny_buh said:
Any news about not-blueish displays?
Is there any possibility to find a near white perfect display, or all display suffers of the same bluish issue? (yesterday I've checked a pair of samples here in Italy, and both were quite blu in my opinion)
I've read that blu oled pixel lifetime is lower than other colors, so Samsung could intentionally push blu pixel in order to compensate color balance in the long term.
Also Gorilla Glass is a bit bluish, so it could contribute to increase the overall blue dominant.
Click to expand...
Click to collapse
No news anymore.
But I am deffinatly sure that my blue tint is not coming from the screen. When i turn my screen off and reflect it in some light and play with it, i can clearly see that it still is blue...
Here are some pictures taken from engadget... You can see it here.
This one shows it....
Uploaded with ImageShack.us
This one does not. So look carefully.
My main complaint with the screen is that last 2 out of 4 TFP's I had had washed out colours. Yes, there is a thread in regards to colours, but I want to take slightly different approach.
On Sensation, if you run command "dmesg" without brackets it brought load of info, including PANEL_ID_PYD.... Which gave you type of the screen. Since I had 50/50 good/bad screens, I wonder if we have different screens being shipped with TFP. Unfortunately, that command doesn't bring up anything like that, so question is, how to check screen manufacturer.
Now, I bet 100% that some of you have it and don't even know about it. My family thinks I'm mad, but being an amateur photographer made me see colours a bit more than your average person. So, even if you don't think your colours washed out, please check it and let me know your findings.
See this picture.
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Check it with your phone/pc/laptop and place them side by side.
Anything?
Thanks guys.
Sent from my HTC Sensation XE with Beats Audio using xda premium
from the reports on this forum there definitely seems to be a lot of variation in the calibration of the tf201 screens that have been shipping. people who care about color and have gone through multiple units have observed that one is warm, another cool, another washed out... putting color tests up side-by-side against my HP ZR30w (S-IPS) and samsung GSII (super AMOLED plus), my tf201 is definitely a bit too warm and it doesn't have the best gamut compared to high end displays. but that's not really fair because both of these screens are more expensive and higher quality than what the tf201 is spec'd out to be. imo the tf201 screen is still very nice compared to other tablets out there so i'm fine with it.
Thanks for the input. I don't mind it to be on a warm side, but I like my red to be RED, not pale red. Same goes for blue. These seem to be most affected colours.
Anyone else?
Sent from my HTC Sensation XE with Beats Audio using xda premium
The colors on my screen aren't even consistent lol
If I manually set my brightness, sometimes I'll unlock the screen to find deep, vibrant colors, and other times I'll unlock it to greens that I can barely see and reds that are nearly a shade of dark pink...
I personally believe that aside from actual individual defects of these screens, that ICS is at least partially to blame.
Anyone still on Honeycomb who can check this out? I swear I can't find a pattern to what causes them to look good or washed out, but I never know which I'll get. Reboot generally comes up to good colors (haven't noticed otherwise anyway)
I can tell you. Watch MAPS icon carefully, switch to battery mode, then back to normal or performance and watch the magic happen. Then lock and unlock screen to find normal-ish colours again.
Sent from my HTC Sensation XE with Beats Audio using xda premium
tinky1 said:
I can tell you. Watch MAPS icon carefully, switch to battery mode, then back to normal or performance and watch the magic happen. Then lock and unlock screen to find normal-ish colours again.
Sent from my HTC Sensation XE with Beats Audio using xda premium
Click to expand...
Click to collapse
But I never take it off the battery-saver. Ever. And my colors still get tweaked (although that explains lack of issue on boot up) sporadically. This is what I assumed it was at first, and may play a part, but isn't (in my case at least) the whole story...
buxtahuda said:
But I never take it off the battery-saver. Ever. And my colors still get tweaked (although that explains lack of issue on boot up) sporadically. This is what I assumed it was at first, and may play a part, but isn't (in my case at least) the whole story...
Click to expand...
Click to collapse
battery saver mode definitely degrades display quality, wouldn't be surprised to find that it induces color shifts as well. run balanced mode for a while and see if you still have the problem.
Actually, in my case saver mode gives more accurate colours than two others. Did you do the test I mentioned in op ?
Sent from my HTC Sensation XE with Beats Audio using xda premium
tinky1 said:
Google "color test", select images, and open the very first picture.
Click to expand...
Click to collapse
lol, I got one of those colorblind tests. Looks warmer on the TFP than on my phone.
Lol, I guess I'll have to upload that particular picture. Just find one with all the colours on it.
Btw, I hope Google search is not tailored to you, if it is you should see an eye specialist.
Sent from my HTC Sensation XE with Beats Audio using xda premium
tinky1 said:
Actually, in my case saver mode gives more accurate colours than two others. Did you do the test I mentioned in op ?
Sent from my HTC Sensation XE with Beats Audio using xda premium
Click to expand...
Click to collapse
Lol, I ran that "test" just by looking at home screens, then inside the market the first day of owning. All you really need to look at is your market, then look at the green, orange, blue, and red rectangles for the different sections. My tablet is ICE compared to my HTC Vision. I mean, almost looks like different pallets entirely.
OP updated with pic
tinky1 said:
OP updated with pic
Click to expand...
Click to collapse
may want to update the title of the thread as well to reflect the discussion about color
Yes, this is the exact problem I had. My colors were good until the .33 update. Now it is washed out. I returned it for another one and it is just as bad. I guess I got unlucky twice. I wonder if theres a firmware/software update for this issue. My HTC thunderbolt looks a lot better
d1ez3 said:
Yes, this is the exact problem I had. My colors were good until the .33 update. Now it is washed out. I returned it for another one and it is just as bad. I guess I got unlucky twice. I wonder if theres a firmware/software update for this issue. My HTC thunderbolt looks a lot better
Click to expand...
Click to collapse
This is why I think it is an issue of software more than anything. I do know that screens by default will be cooler or warmer than another; my identical LG LED monitors are just the slightest bit different. But the issue with washing out is something I did not notice in the few hours I was able to use my Prime and root it before it updated.
Yes, some will be slightly "defective," but I'm waiting for this next update and some homebrew'in ROM love after the unlocker. Then we'll truly see what's going on.
It's not as noticeable as it really is, dig?
I think it's clearest on magenta there, this is on Performance and SuperIPS.
The reason I'm doing it that way is that the picture is aweful without the SuperIPS on, when side-by-side to my LED screens.
Power saving + SuperIPS. More noticeable, but still doesn't look as bad as it does on the naked eye
Side-by-Side [Power saving | Performance]
jaypm said:
may want to update the title of the thread as well to reflect the discussion about color
Click to expand...
Click to collapse
Any suggestions as how to name it?
Sent from my HTC Sensation XE with Beats Audio using xda premium
buxtahuda said:
It's not as noticeable as it really is, dig?
I think it's clearest on magenta there, this is on Performance and SuperIPS.
The reason I'm doing it that way is that the picture is aweful without the SuperIPS on, when side-by-side to my LED screens.
Power saving + SuperIPS. More noticeable, but still doesn't look as bad as it does on the naked eye
Side-by-Side [Power saving | Performance]
Click to expand...
Click to collapse
Your one is good, very good. I'll post mine in the evening.
Now to determine wherever it is sw problem, we need to see if all of primes are the same, and if they are not, do panels differ or not. If panels are different, then possibly it is software. If panels are identical, then we have same sw, same panel, different colours = bad screen.
Sent from my HTC Sensation XE with Beats Audio using xda premium
You cant just compare the colors on two different devices and say its the primes screen. There isnt a single display/graphics card on the market that displays colors correctly uncalibrated, regardless of how much you paid for it. With most displays the colors will be affected by the luminance levels. Most people adjust their displays for higher contrast and more saturation than what is actually true which can make other devices look pale or washed out. Im a professional photographer and know all to well that you cant use and uncalibrated monitor/grahics card combination for color adjustment in the photos. Ive seen many people over the years blame their cameras or printers for bad colors in photos when in reality it was the fact that an uncalibrated monitor was used in post processing. I use Xrite colormunki calibration tools on my PC and printer to make sure that what you see is what you get and its all true colors. This solution uses an optical measuring device and sends color offest values to the grahics card and print drivers. Any color variations are defnitely a matter of drivers to the display and unfortunately there are no adjustments available on android tablets although Spyder did release an app for Ipads.
I understand where you are coming from. It's not realistic to expect everyone to have calibrated screen. And yes, colours will vary between computer screens.
I had 4 primes, so I do have something to compare it to. I didn't notice anything like that with the first two, but it was obvious with last two.
Also, I compared it to all devices I have, and every device outperformed prime in regards to colour reproduction, especially red and blue.
Could you check yours with colormunki or against your calibrated screen please?
I really hope it's down to software, but I can't afford to gamble £500 on it.
I had some prints done professionally and compared them to my screen, so my screen is fairly close to real colours.
Sent from my HTC Sensation XE with Beats Audio using xda premium
I wanted to branch out from the other thread and actually do a poll to see how many people are experiencing this problem, and how severely. In the other thread (http://forum.xda-developers.com/showthread.php?t=1515299), several people claim that their copies are absolutely perfect and show no signs of black crush. If you indeed have a "good" screen, your feedback will be incredibly valuable. Please post pictures of your phone, if you do the test below and the blacks display correctly!
The reason that most of us are seeing "black crush" or ugly blockiness in dark areas in videos and photos is that these artifacts are present in the source material. Blocky patterns are a result of compression, and are most noticeable at the extreme ends of the dynamic range, where there is the least amount of detail. So if these compression artifacts are present in the source material, why do we not see it on other devices? It is because most other displays are properly calibrated to gradually gradate dark tones from dark gray to black. In other words, on a properly calibrated display, the color #000000 (black, or RGB 0,0,0) is virtually in distinguishable from #010101 (RGB 1,1,1). In fact, it is hard to tell a difference until #050505 (RGB 5,5,5). Therefore, most of the clipping that occurs as a result of compression artifacts is hidden. However, with the Note, #010101 is very much distinguishable from #000000. Dark tones are too bright, and we're able to see clearly until #010101. Instead of gradually moving to black, at #000000, it drops off a cliff. This is why we see such a dramatic different between the darkest grays and blacks, and why this black crush issue is so noticeable.
The side effect of having grays that are too bright is that when watching Blu-ray quality HD video, the dark areas look washed out, and the picture lacks "punch". High quality video that is properly encoded very rarely have pure blacks (to avoid clipping). As a result, dark scenes appear too bright on our phones.
The method to test is with a gamma test pattern, which I have attached. Download QuickPic from Market/Play (free). Go to Settings -> Viewer, and check the box for 32-bit render. Then, download the attached .png file, and view it in full screen in QuickPic. Make sure to do this in a DARK room!
Each box with a number has a corresponding RGB value. For example, the box with the number 1 is RGB 1,1,1, and so on. Load it on your Note and report back the smallest number that you are able to see. Also, does it gradually go to black, or does it just abruptly go to black without a smooth transition?
Last week, I went to two AT&T stores, and tested every display model with this method. Even with the bright store lights, it was possible to see box #1 on every phone. Repeated the test on an iPad 2, Galaxy Tab 10.1, and Skyrocket. The iPad was too dark, as the entire left side of the test picture is unreadable. On the Galaxy Tab, I could see box #7 or so. The Skyrocket showed a similar problem to the Note, as it seemed to abruptly transition to black. However, it was still a bit smoother than the Note, and box #4 was the smallest I could see.
Here's a picture of the test on my phone. The right side is the test image itself, so you can see how it is supposed to look like on your computer screen. Compare this with what you see on your phones.
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I can see all the numbers on the left side in a dark bathroom only black is the part above the number 1. I'm thinking of exchanging my note...
Sent from my SAMSUNG-SGH-I717 using Tapatalk 2 Beta-2
If i understand correctly its not hardware then?
Sent from my SAMSUNG-SGH-I717 using XDA
I just updated the YouTube app and watched all those videos that were linked in the other thread and it actually seems to have made a difference. Looks a lot better. Maybe it was just bad quality before?
Sent from my SAMSUNG-SGH-I717 using XDA
Deviance said:
I can see all the numbers on the left side in a dark bathroom only black is the part above the number 1. I'm thinking of exchanging my note...
Sent from my SAMSUNG-SGH-I717 using Tapatalk 2 Beta-2
Click to expand...
Click to collapse
I'm not sure exchanging it will do anything. Like I said, I have tried 5 different display models. I have also had 2 Notes myself, so that's 7 copies total and they all exhibit this issue. When people watch a video, like starfield 720p and claim that it's "perfect", that can be subjective. But if you're able to clearly see the box with the number 1, and is dramatically different from the black box above it, then you can objectively conclude that the device has a problem. If you go exchange it, and get lucky, report back. One of the things I want to find out is what percentage of Notes (if any) display dark tones correctly.
SkizzMcNizz said:
If i understand correctly its not hardware then?
Sent from my SAMSUNG-SGH-I717 using XDA
Click to expand...
Click to collapse
I have no idea if it is hardware or not. It could be something as simple as an incorrect gamma curve, or it could be caused by a hardware limitation. If you want to get more into the technical stuff, you can refer to Supercurio's thread here: http://forum.xda-developers.com/showthread.php?t=1430847
tenderchkn said:
I'm not sure exchanging it will do anything. Like I said, I have tried 5 different display models. I have also had 2 Notes myself, so that's 7 copies total and they all exhibit this issue. When people watch a video, like starfield 720p and claim that it's "perfect", that can be subjective. But if you're able to clearly see the box with the number 1, and is dramatically different from the black box above it, then you can objectively conclude that the device has a problem. If you go exchange it, and get lucky, report back. One of the things I want to find out is what percentage of Notes (if any) display dark tones correctly.
I have no idea if it is hardware or not. It could be something as simple as an incorrect gamma curve, or it could be caused by a hardware limitation. If you want to get more into the technical stuff, you can refer to Supercurio's thread here: http://forum.xda-developers.com/showthread.php?t=1430847
Click to expand...
Click to collapse
Thanks. I don't want to return my phone to best buy again for a 5th time. I think I've shopped there for the last time. I had quality control problems with them with the galaxy tab also. Im gonna see if at&t will carry out my exchange this.time
Sent from my SAMSUNG-SGH-I717 using XDA
SkizzMcNizz said:
I just updated the YouTube app and watched all those videos that were linked in the other thread and it actually seems to have made a difference. Looks a lot better. Maybe it was just bad quality before?
Sent from my SAMSUNG-SGH-I717 using XDA
Click to expand...
Click to collapse
Make sure to test with the attached .png file. Like I said, watching a video can be subjective. If you open up the test image in full screen and can see all the way to the number 1, then the videos may "look" better, but the underlying problem still exists.
tenderchkn said:
I'm not sure exchanging it will do anything. Like I said, I have tried 5 different display models. I have also had 2 Notes myself, so that's 7 copies total and they all exhibit this issue. When people watch a video, like starfield 720p and claim that it's "perfect", that can be subjective. But if you're able to clearly see the box with the number 1, and is dramatically different from the black box above it, then you can objectively conclude that the device has a problem. If you go exchange it, and get lucky, report back. One of the things I want to find out is what percentage of Notes (if any) display dark tones correctly.
Click to expand...
Click to collapse
Thanks for your input. I am going to show this to ATT and see if they can let me test the note's and hope to find one that is better. There has been some luck with others in the other threads posted. I hope I can get one that is better or Samsung fixes the problems. I saw the clipping problem for the first time on a 2gig 720p copy of Killer Elite and I was so mad that my new phone has this problem.
****, I never realized an issue, but I did the test and it looks like the picture of your phone. I can see all the numbers on the left.
Mine looks just like yours... so I guess I am severe
Test does look quite different depending on how much you turn up the brightness, but either way I can see all the numbers.
Edit: but no way in hell am I returning it for a model that runs hot, is laggy, purple blotches, or whatever other issues people complain about around here.
See on mine i can barely see the numbers on the left
Has anyone found a larger version of the test pic? 400x640 seems too small
stevieraveon said:
****, I never realized an issue, but I did the test and it looks like the picture of your phone. I can see all the numbers on the left.
Click to expand...
Click to collapse
Sent from my SAMSUNG-SGH-I717 using XDA App
00mred00 said:
See on mine i can barely see the numbers on the left
Has anyone found a larger version of the test pic? 400x640 seems too small
Sent from my SAMSUNG-SGH-I717 using XDA App
Click to expand...
Click to collapse
Are you doing this in a dark room, and viewing the image in full screen using QuickPic as I suggested? The resolution doesn't matter, as these are solid blocks of color. When you display it on full screen, it will stretch to cover your screen.
tenderchkn said:
Are you doing this in a dark room, and viewing the image in full screen using QuickPic as I suggested? The resolution doesn't matter, as these are solid colors. When you display it on full screen, it will stretch to cover your screen.
Click to expand...
Click to collapse
Yeah, I was in the living room and looked and thought there was no problem, until I went into the bathroom with all the lights off...then it was clear as day.
So what can we do to fix this?
The Pic on my phone looks exactly like the one you show in the 1st post on the left I can clearly see all the way to #1.
So what can we do to fix this if there is anything that can be done or should we send our Notes back to Samsung?
I can see all the way down to 1 and this is my 4 phone. The black clipping issue is almost non existent on my phone. Don't know if this test is accurate.
Sent from the TermiNOTEr! ;-)
Unfortunately I can see all the numbers, I have another Note which needs fixing, once its fixed I'll post again.
JGuinan007 said:
The Pic on my phone looks exactly like the one you show in the 1st post on the left I can clearly see all the way to #1.
So what can we do to fix this if there is anything that can be done or should we send our Notes back to Samsung?
Click to expand...
Click to collapse
As of now, there is no known fix. Supercurio has been working on a fix for this since January. I have linked his thread below. The purpose of this thread, like I said, is to create an objective method of checking if black clipping exists on your device. This is a reliable and easy way of reproducing the issue, with the hope that you can easily demonstrate this to an AT&T or Samsung rep.
borijess said:
I can see all the way down to 1 and this is my 4 phone. The black clipping issue is almost non existent on my phone. Don't know if this test is accurate.
Sent from the TermiNOTEr! ;-)
Click to expand...
Click to collapse
If you can see all the way down to 1, then your phone definitely has the black clipping issue. As I said before, watching a video is subjective. I can download the starfield 720p video with tubemate, and it will look great - but that's because the blacks in the video are pure black. With a real world video, this will not be the case.
When you see the box with RGB values of 1,1,1 and it is dramatically different than the top left box with RGB values of 0,0,0, then your phone exhibits the problem. If you still have doubts, go create your own image, and fill in half with RGB 1,1,1 and the other half with RGB 0,0,0. Put it on your phone and you will see a huge difference. On a properly calibrated display, the difference should not be discernible. Try it on other devices (TV, laptop, monitor, other phones, whatever), and you will see what I mean.
Read Supercurio's description of the problem in his thread: http://forum.xda-developers.com/showthread.php?t=1430847
He says, "Worst offender being shadows rendering: my diagnostic: what's supposed to be dark is not so dark.. and then boom its black (ie black clipping)
As a result color look dull, some UI elements show not quite as they're supposed to, and videos exhibit awful banding, blocking and ringing artifacts."
This is an accurate description of what we are all experiencing, and this test simply proves his hypothesis. I don't see how such a simple and objective test can be disputed as inaccurate.
The phone I have shows minimal black crush compared to the others three notes I had. But I just tried this test on my monitor and it barely shows 21 and 22. On my phone it shows to 1 and I thought my phone was almost perfect. Its ok I am very happy with the one I got until if any fix comes.
Mad as Pete
What does Samsung have to say about this? Are they aware of the issue? Are they working on a fix? Will it be fixed on the new ICS Galaxy suite update? Do we have to wait for AT&T to get fix from samsung and then wait another 4 months for AT&T to send it out us? Is AT&T aware of the issue? Has anyone told PhoneArena, Android Police, or contacted the Press and Media? Should I justt return my Note and never buy Samsung again? This makes me really mad the N7000 was released back in Oct and has this issue and it still has not been addressed? We spend $650 for a phone because of the big display and it has black clipping?
When I open up the test screen using the browser, the resulting image looks pretty good with the gradual black fade to nothing. but using quickpic and gallery, it shows the clipping. What's the difference?
Just wanted to let people know that trickster mod (in play store) has color calibration. Root required.
Sent from my VS980 4G using Tapatalk 4
heffzilla said:
Just wanted to let people know that trickster mod (in play store) has color calibration. Root required.
Sent from my VS980 4G using Tapatalk 4
Click to expand...
Click to collapse
yup i saw that. any good profiles? i'm keeping mine stock for now bc i'm bad at calibrating color lol it seems pretty good stock..
jayochs said:
yup i saw that. any good profiles? i'm keeping mine stock for now bc i'm bad at calibrating color lol it seems pretty good stock..
Click to expand...
Click to collapse
Lol, yeah I left it alone. I just thought I would share for the guys who like tinker and weren't aware of it
Sent from my VS980 4G using Tapatalk 4
Is there any overhead with this type of thing that's not kernel based?
Sent from my LG-D800 using Tapatalk 2
LG is oversaturating on this display(don't ask me or question my decision, I've seen the gamut) and I believe it's best to leave it at stock except you want the washed out nexus 4 default colors.
...
Sent from my LG-D800 using Tapatalk 4
hackarchive said:
LG is oversaturating on this display(don't ask me or question my decision, I've seen the gamut) and I believe it's best to leave it at stock except you want the washed out nexus 4 default colors.
Click to expand...
Click to collapse
You should see Samsung phones, talk about oversaturation!
geoff5093 said:
You should see Samsung phones, talk about oversaturation!
Click to expand...
Click to collapse
While I don't disagree, for some reason the S4's screen is still easier on my eyes than the G2's. (and I'm not coming directly from an S4) Maybe the G2's auto-brightness is just leaning towards being too dim, or maybe over-saturating a LCD screen looks worse than an over-saturated AMOLED screen, or maybe it's simply the text that the G2 uses... I don't know what it is, but I'm finding the G2's screen doesn't feel as nice to my eyes as the S4's. I know, I'm probably crazy...
jntdroid said:
While I don't disagree, for some reason the S4's screen is still easier on my eyes than the G2's. (and I'm not coming directly from an S4) Maybe the G2's auto-brightness is just leaning towards being too dim, or maybe over-saturating a LCD screen looks worse than an over-saturated AMOLED screen, or maybe it's simply the text that the G2 uses... I don't know what it is, but I'm finding the G2's screen doesn't feel as nice to my eyes as the S4's. I know, I'm probably crazy...
Click to expand...
Click to collapse
Yeah, you're crazy.
Sent from my LG-D800 using xda premium
geoff5093 said:
You should see Samsung phones, talk about oversaturation!
Click to expand...
Click to collapse
I'm not going to argue here but when I do lay out information I know what I mean.I did a test and this reviewer did it too.They r the same!LG is oversaturating.Watch this before saying what not.Samsung doesn't over saturate.Their displays are produced like that by default and have a wide gamut.But they seem to be correcting that with the s4.
I can tell you what it is.. it's the glass and LCD combo they use. it's weird on the eyes. it's very reflective and can almost get a weird rainbow effect, and it has bad angle viewing.
this screen is almost identical to my rezound.. amazing screen but it had that weird glossy effect to it. the dna however was a diff type of screen apparently bc it didn't resemble that at all... and now the g2 does again.
basically it's hard to explain but htc uses a screen very similar to this in the rezound which is reflective and glossy whereas in the dna and one they switched to some different type. maybe it's the glass? idk. but the g2 does have a diff type of LCD screen to it.
Sent from my LG G2 using Tapatalk 4
---------- Post added at 12:37 PM ---------- Previous post was at 12:35 PM ----------
also idk how you can say the s4 isn't over saturated. I have to set it down to the standard or photo screen setting bc their stock is the dynamic one that's super saturated.
Sent from my LG G2 using Tapatalk 4
hackarchive said:
LG is oversaturating on this display(don't ask me or question my decision, I've seen the gamut) and I believe it's best to leave it at stock except you want the washed out nexus 4 default colors.
Click to expand...
Click to collapse
If you don't want people to ask you why you've come to this conclusion or to even have the audacity to question your decision, then perhaps you're better off not posting something at all. Talk about a terrible post, essentially you say "Do what I tell you, and don't ask why".
You can see here that while the G2 display covers sRGB space nicely, LG have pushed the saturation on R, G, and B values. For instance, look at the two dots at the bottom in Blue. The next to last dot should be in the next to last square for accuracy. Instead, as R, G, and B values approach maximum saturation, the color approaches full saturation too quickly. Hard to explain but stare at the chart for awhile and you will understand :fingers-crossed:
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WPWoodJr said:
You can see here that while the G2 display covers sRGB space nicely, LG have pushed the saturation on R, G, and B values. For instance, look at the two dots at the bottom in Blue. The next to last dot should be in the next to last square for accuracy. Instead, as R, G, and B values approach maximum saturation, the color approaches full saturation too quickly. Hard to explain but stare at the chart for awhile and you will understand :fingers-crossed:
Click to expand...
Click to collapse
Actually not hard to understand if you understand photography,
But from the chart you can see that the colors are also shifted in ways that will make the screen look strange or skin tones maybe too green or red.
So not only does it saturate too quickly but the colors are shifted.
Semantics said:
If you don't want people to ask you why you've come to this conclusion or to even have the audacity to question your decision, then perhaps you're better off not posting something at all. Talk about a terrible post, essentially you say "Do what I tell you, and don't ask why".
Click to expand...
Click to collapse
I don't know why some keep arguing.I own a G2 and we r on the same side.I'm stating the facts and they r as clear as the fact that LG made this phone(or is it made by Apple?).That's y I say don't question the proofs of over saturation I laid before.The picture above is crystal clear!
Um, yeah. The screen looks just fine to me. I really don't care what charts say, I'm sitting here with my g2 next an s4 and the g2 looks less "cartoony" so I'm fine with it. I just thought I would mention that color calibration was available, not to start a lecture on color saturation.
Sent from my VS980 4G using Tapatalk 4
perfectly fine for me too!
hackarchive said:
I don't know why some keep arguing.I own a G2 and we r on the same side.I'm stating the facts and they r as clear as the fact that LG made this phone(or is it made by Apple?).That's y I say don't question the proofs of over saturation I laid before.The picture above is crystal clear!
Click to expand...
Click to collapse
I understand and I'm not arguing with you, I just think the delivery could have been a bit better. You could have at least left it open to foster a discussion, and not been so dismissive to people who might have questions about your conclusion. That's all I was getting at.
Maybe I am a saturation sucker but I did like the colors on my S4, seemed to pop on there.. not so much on the G2, its lighter
IamPro said:
Maybe I am a saturation sucker but I did like the colors on my S4, seemed to pop on there.. not so much on the G2, its lighter
Click to expand...
Click to collapse
Took me a while to get used to the LG screens when I first got my Nexus 4. I actually prefer them now to the S4 and the One. One thing I really like is that there is pretty much no space between the glass and the screen. I think it will grow on you. The screen looks brilliant with video and colorful backgrounds, etc.
Seems the Galaxy Note7 uses PWM
It's a shame, because my (and some other peoples) eyes are too damaged to handle screens that have PWM (nearly all)
I wish Samsung would really do something about this once and for all, maybe have a hidden option to disabled PWM that is activated with those dialer codes, etc.
https://www.youtube.com/watch?time_continue=131&v=SzCgp-FEU50 (skip to 2:10)
http://i3.mirror.co.uk/incoming/art...s615b/Samsung-Galaxy-Note-7-Weibo-leaks-1.jpg
what is PWM... excuse my ignorance
Sent from my SM-N910F using Tapatalk
Diaconescu_Tiberiu said:
what is PWM... excuse my ignorance
Sent from my SM-N910F using Tapatalk
Click to expand...
Click to collapse
I think it stands for Pulse Width Modulation.... Basically it causes the displays to have a slight flicker to them at lower brightness settings as the display is switched on and off very rapidly.
Pretty sure PWM isn't something that can be turned on or off via software - it's how the display controller manages brightness levels.
Sent from my SM-G930W8 using Tapatalk
It can be controlled (diminishing its effects) via Lux Dash app
Sent from my SM-N910F using Tapatalk
Diaconescu_Tiberiu said:
It can be controlled (diminishing its effects) via Lux Dash app
Sent from my SM-N910F using Tapatalk
Click to expand...
Click to collapse
Thanks Tiberiu,
I'm also interested in a solution to pwm, how can this app mitigate the effect of the flickering ?
Unfortunately Pwm cannot be 'turned off' except possibly by having the display at full brightness all the time. Any reduction in brightness uses PWM.
Every LED screen and light is dimmed by PWM in any product on the market. The difference some people see (myself included) is the frequency used for PWM, and that is dictated by hardware or very low-level software in the display controller.
millab said:
Unfortunately Pwm cannot be 'turned off' except possibly by having the display at full brightness all the time. Any reduction in brightness uses PWM.
Every LED screen and light is dimmed by PWM in any product on the market. The difference some people see (myself included) is the frequency used for PWM, and that is dictated by hardware or very low-level software in the display controller.
Click to expand...
Click to collapse
Not 100% true. BenQ monitors and Macbook's (above 50% brightness) don't use PWM for example
Even then on the Macbook example it's still over 100Khz according to some contacts of mine.
Ace&tripleD said:
Thanks Tiberiu,
I'm also interested in a solution to pwm, how can this app mitigate the effect of the flickering ?
Click to expand...
Click to collapse
By leaving the actual hardware screen at full brightness and using an overlay to "dim" the image. Unfortunately this still has battery life implications and some phone screens still use PWM at full brightness, it's much less apparent but can still hurt me.
jtl999 said:
By leaving the actual hardware screen at full brightness and using an overlay to "dim" the image. Unfortunately this still has battery life implications and some phone screens still use PWM at full brightness, it's much less apparent but can still hurt me.
Click to expand...
Click to collapse
I know this is working on an ordinary LCD screen, but will it work on a OLED one too ?
Ace&tripleD said:
I know this is working on an ordinary LCD screen, but will it work on a OLED one too ?
Click to expand...
Click to collapse
In what way?
jtl999 said:
In what way?
Click to expand...
Click to collapse
well the technology is different: on a LCD dimming by using a darker overlay will only affect the liquid crystal keeping the backlit at full power, but on a OLED not sure how it works at the pixel level - probably the only way a pixel gets darker is by starting to flicker. In this case a dimming overlay will still produce pwm...
Ace&tripleD said:
well the technology is different: on a LCD dimming by using a darker overlay will only affect the liquid crystal keeping the backlit at full power, but on a OLED not sure how it works at the pixel level - probably the only way a pixel gets darker is by starting to flicker. In this case a dimming overlay will still produce pwm...
Click to expand...
Click to collapse
Your exactly right, and I believe it is implementation dependent and may have seen it in youtube videos captured at the right shutter speed. But it doesn't happen that way on all phones.
Also my cousin showed me his Moto X (AT&T version) and it appeared to be AMOLED but PWM free at any brightness. Anyone help me out and find what version it is?
I just messaged him and will edit if he gets back to me.
It was either a first or second gen Moto X that was AMOLED but didn't use PWM. A potential reverse engineering target? In any case I might be seeing him in Mid September so I would check again.
jtl999 said:
Your exactly right, and I believe it is implementation dependent and may have seen it in youtube videos captured at the right shutter speed. But it doesn't happen that way on all phones.
Also my cousin showed me his Moto X (AT&T version) and it appeared to be AMOLED but PWM free at any brightness. Anyone help me out and find what version it is?
I just messaged him and will edit if he gets back to me.
It was either a first or second gen Moto X that was AMOLED but didn't use PWM. A potential reverse engineering target? In any case I might be seeing him in Mid September so I would check again.
Click to expand...
Click to collapse
I don't think you understand... Just because you can't see the PWM effect doesn't mean that it isn't using PWM - it just means the frequency is high enough that your eye can't see the flicker. It comes down to the frequency the engineers choose to use
I don't notice any flicker on my Verizon Note 7.
Sent from my SM-N930V using Tapatalk
californiarailroader said:
I don't notice any flicker on my Verizon Note 7.
Sent from my SM-N930V using Tapatalk
Click to expand...
Click to collapse
congrats on ur note 7
could you lower the brightness to less then 50% and do the pencil test ? and see if you can spot this type of pattern ?
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
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"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
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No need for that. Look at any review of the Note where the screen brightness is lower, or a picture of the screen. You will see the "scrolling lines" effect which is a result of PWM frequency and shutter speed of the camera not matching up.
PWM is annoying at lower frequencies. It seems the Note 7 panel uses a high enough frequency where I can't see it flickering.
I know it varies from person to person but that's luck of the draw I guess. Some people will have no issues while others will get headaches.
LinS123 said:
PWM is annoying at lower frequencies. It seems the Note 7 panel uses a high enough frequency where I can't see it flickering.
I know it varies from person to person but that's luck of the draw I guess. Some people will have no issues while others will get headaches.
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hi, did you try the pencil test at low brightness ? I haven't found yet a review that measures the pwm more precisely
I don't see any difference in the image at 0% and 25%. Not sure what I'm looking for. But no flickering for my eyes.
Sent from my SM-N930W8 using XDA-Developers mobile app
LinS123 said:
I don't see any difference in the image at 0% and 25%. Not sure what I'm looking for. But no flickering for my eyes.
Sent from my SM-N930W8 using XDA-Developers mobile app
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just have a look at this video https://www.youtube.com/watch?v=QriSp-Ffgkg
there is definitely a stroboscopic effect on the pencil when moving it quickly