screen calibration - Redmi K20 / Xiaomi Mi 9T Questions & Answers

Hello, does anyone know how to calibrate the screen to be the closest thing to Samsung screens?

Use increased contrast option on display settings. It represents dci-p3 color gamut, so it will give you the most vibrant color, similar like amoled cinema on Samsung smartphones.

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[Q] galaxy tab 7.7 vs galaxy note screen comparision

Hey guys i have a request for those who have both galaxy tab 7.7 and galaxy note to upload a video comarision between galaxy tab 7.7 and note both at MAXIMUM BRIGHTNESS.
I have been searching this from months but never got a proper solution
I am in a dilemma between tab 7.7 and note.According to me a mobile device's most important part is its screen and i love samoled screens.I heard that the colour gamut is more poping on samoled plus than samoled hd, thats why i cant decide to buy which one.so plz put some light on my problem.
thanks in advance.. .. ..
Both look good. I have the note and the 7.7.
The colors are really popping on both, especially deep greens and blue.
Whilst the Note does have a pentile display, the higher dpi allows even text to remain solid with very little blurriness.
More important than screen when selecting between the two is that each fills a very specific niche. 7.7 is a very portable tablet with the phone function as a bonus. Note is a phone with the tablet function as a bonus. Which is more important to you?
To be honest, the 7.7 is a lousy phone. The Note is a lousy tablet.
thankx for your guideance
but when i compared my wave s8500 with the galaxy s2,i found that the colours on gs2 are warmer and a bit more poping but the brightness on my s8500 was a bit low.Is this same for note and tab 7.7 ?
also have both devices,
for me it was WAY harder to get an acceptable note screen (swapped almost 15 times) as to get a decent 7.7 (second device)! there are huge threads about the display problems of both devices, i suggest you at least take a short look at them!
the 7.7 has a much better screen i had an international unlocked note but sold it as soon as i bought the 7.7 i dont think anyone who has owned both will tell you the note has a better screen
I dont have the note anymore as i sold it in favor of the 7.7 . Because the note have a smaller screen it will definitely have a more sharper picture because of its higher dpi even if it has an inferior pentile screen but the 7.7 also have a very pleasing screen.
One solution to even increase the tabs brightness and saturation is to go to settings - screen - mode and select dynamic color. You will see the the screens will become even more vivid with more pronounced color.
One of the few things about the 7.7 screen is that:
There is a slight greenish tint when viewing a white screen off angle.
Flesh tones, light tan have a color shift when viewing off angle (probably the green again).
Otherwise, no dead pixels, burned in images, streaks or other defects.
If anything, I can't get the screen dim enough indoors, at full brightness indoors the thing is a flame thrower, outside, the brightness is good.
There are three modes: "dynamic", "normal", and "movie" (as compared to normal)
Dynamic -- strong color boost, strong contrast obliterating bright and dim detail, some edge enhancement.
Normal -- slight color boost, light contrast, some edge enhancement.
Movie -- reasonable color, reasonable contrast, least edge enhancement.
The best overall mode in my opinion is "movie", "normal" will probably satisfy most people and still have the Wow! factor, "dynamic" definitely has the Wow! factor but is probably too much of a good thing and ultimately picture quality suffers.
The power saving option has color settings as well. I think all of those affect the picture negatively (too blue-ish looking).
7.7 is better, I owned Note, then sold it for this. While Note is pleasing to look at, 7.7 is taking it up a notch for me. Owning the device for more than 1 month, I still get wow-ed whenever I turned on my 7.7..
But my nightmare is the screen itself!
Samoled tends to degrade very quick and i just hate those screen burn in ,bacause i own a galaxy s and omg the screen burn in is horrible!
And i also searched xda about 7.7's screen and got to know about the circles,uneven brightnes blah blah blah. . . . .
All these things force me not to buy a samoled device ever.
According to phonearena samoled plus produces more warmer colours than samoled,
is this true for 7.7 and note too?
As per as the the photos on colour gamut section shootout in phonearena its clearly visible that samoled plus produces more darker and vivid colours?
I own both devices. In general, I would say that the Note appears brighter to me than my 7.7
However, the 7.7 has much more accurate and balanced colour reproduction than the Note, especially when using movie mode on both devices. Movie mode is generally warmer and more natural looking.
Don't get me wrong though, both screens are really fantastic in their own rights, and I love both. I just use the 7.7 more often due to its form factor.
In my own opinion, I find the Note to have a better color balance which is more neutral compared to the Tab7.7, side by side the Tab7.7 does offer more saturated colors, lower white brightness and deeper blacks. Disregarding the smaller form factor and the video clipping issue on the Note, I find watching movies on the Note slightly better because it does not crush a lot of shadow details.
Of course not all screens are made and calibrated equally, so my opinion will surely differ from everyone else.
Me too accept that tab 7.7 has one of the best displays available in the market,but what about the burn in issue,dark circles,uneven brightness?
I was thinking of buying the 7.7 in this week but these issues dont allow me to do so . . . .
Perhaps the SAMOLED+ should be treated like plasma screen:
Keep the contrast at a minimum levels for the first 100 hours of use or so.
To me that would mean setting the 7.7 screen mode to "movie" and brightness to about 25% or less and having a less dynamic low contrast background for that time.
You mean if i will set it to low brightness for 1st 100 hours, it wont get that burn in effect?
Super AMOLED Plus, first introduced with the Samsung Galaxy S II and Samsung Droid Charge smartphones, is a further development where the PenTile RGBG pixel matrix (2 subpixels) is replaced with Samsung's "Real Stripe" (3 subpixels) RGB RGB subpixel arrangement. This goes from eight to twelve subpixels per group, resulting in finer details. The screen technology is also brighter, thinner with AMOLED Plus displays being 18% more energy efficient than the old Super AMOLED displays.
HD Super AMOLED is a new Super AMOLED type display from Samsung. The first device to use it is the Galaxy Note: an Android v2.3 phone with a 5.3" 1280x800 display. The phone (and the display) was announced in September 2011. The second device to use it is Samsung's Galaxy Nexus phone - with a 4.65" display with 1280x720 resolution. The higher resolution and dpi were made possible due to a change in materials and new manufacturing process, though still using shadow mask (or fine metal mask (FMM)) technology. However this required a change back to pentile RGBG subpixels
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Super AMOLED Plus (WVGA) — Samsung Galaxy S II, Samsung Droid Charge, Samsung Infuse 4G, Samsung Focus S, Samsung Galaxy Tab 7.7
HD Super AMOLED (PenTile, HD) — Galaxy Nexus, Samsung Galaxy Note
Some prices you should know:
LCD-Amoled at the moment a iPhone 4 3.7 inch IPS-LCD cost 38.50 dollars.
4.3 inch Super-Amoled-Plus Galaxy S2 50-55 dollars.
7.7 inch Super-Amoled-Plus (Galaxy Tab 7.7) 150-170 dollars.
Sources : Wikipedia & Sammobile
aboozar.khadivi said:
Super AMOLED Plus, first introduced with the Samsung Galaxy S II and Samsung Droid Charge smartphones, is a further development where the PenTile RGBG pixel matrix (2 subpixels) is replaced with Samsung's "Real Stripe" (3 subpixels) RGB RGB subpixel arrangement.
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Erm, wrong... It's 8 sub-pixels for the PenTile SAMOLED and 12 sub-pixels for the SAMOLED+ "Real Stripe"
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Guys i know the difference b/w samoled+ and samoled hd but my question is how to get rid from those burn in issues,dark circles,uneven brightness etc.
I scecifically want to get rid from the burn in issue because i already have a galaxy s and i can clearly see the horizontal lines,clock etc when on a plain white,grey,green etc colour screen.I can even adjust with the dark circles and uneven brightness because i will mostly be using this on max brightness.
Jade Eyed Wolf said:
Erm, wrong... It's 8 sub-pixels for the PenTile SAMOLED and 12 sub-pixels for the SAMOLED+ "Real Stripe"
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Click to collapse
You know 8:12 is the same ratio as 2:3, right? In that image, the blocks are of four pixels, so I don't see it as wrong to say that there are two subpixels per pixel on RGBG PenTile, even if it doesn't capture the subtleties of how images are actually displayed. Certainly there is a 2:1 ratio of subpixels to actual pixels in RGBG PenTile vs. 3:1 in RGB stripe.
pikulu said:
Guys i know the difference b/w samoled+ and samoled hd but my question is how to get rid from those burn in issues,dark circles,uneven brightness etc.
I scecifically want to get rid from the burn in issue because i already have a galaxy s and i can clearly see the horizontal lines,clock etc when on a plain white,grey,green etc colour screen.I can even adjust with the dark circles and uneven brightness because i will mostly be using this on max brightness.
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You can't completely remove burn-in, only take steps to mitigate it. Use as much black in your theming/backgrounds as possible. Remove static UI elements like the status bar. Normal advice is also to run lower brightness, though I guess that isn't an option for you.
Any precautions to be taken for 1st few weeks use?
I can see the burn in even in max brightness on my samsung s8500,will i notice the burn in too on 7.7 at max brightness?
My s8500 shows burn in like horizontal faint lines,status bar etc; so apart from the status bar anyhing else like faint horizontal lines on 7.7 after burn in?
Is the status bar burn in noticeable at max brightness?
TonyBigs said:
If anything, I can't get the screen dim enough indoors, at full brightness indoors the thing is a flame thrower, outside, the brightness is good.
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Look into Screen Filter, or Total Screen Control. I like Total Screen Control better because of the widget and presets, but it is not free.

[Q] Screen color temp and contrast?

Okay, so, one of the things that's really disappointed me with some recent Android tablets I've tried out has been the screen's color temperature and contrast:
1. The Samsung Galaxy Tab 2 7" and Toshiba Excite 10 all had very cold screens, with very blue-ish whites. Also, contrast was poor on both, so reading ebook on them with black text on a "white" background was unpleasant.
2. On some Primes I tried, whites were a dingy yellowish color (although I'm not sure that's because of the temp or some other issue), while some were a nice neutral-to-warm color.
3. The Toshiba Excite 7.7 screen varies depending on how much black/dark colors are being shown, clearly a power-saving feature. On screens with a lot of whites, the temp is made much coolor and contrast is reduced. On screens with a lot of darker colors, temp is warmer, contrast is increased, and whites are much less blue.
So, what I'm wondering about the Nexus 7 is this: what's the apparent color temp? Are whites "white," or are they yellow-ish (warmer) or blue-ish (colder)? And how's contrast, specifically black text on white?
I know I'll get the darn thing in a few weeks, but in the meantime I'm not finding any reviews that say anything other than "great screen for the money." And unless someone's being really careful, it's tough to show screen colors and temperature in pics and video...

IPS display

is it good? I'm only used to OLED.
The IPS display on the Nexus 7 looks good from what I've seen. IPS is known for decent viewing angles.
it depends on the OLED screen you're comparing it to.
the galaxy s2 has super amoled plus, which has a full rgb subpixel matrix, but only a resolution of 800x480. the full rgb subpixel matrix makes everything look clearer and sharper.
the galaxy nexus, galaxy note, and galaxy s3 use a pentile subpixel matrix. its something like rgbg, which makes the display look greenish. its not as sharp as a full rgb matrix, and the colours arent as vivid due to the lack of subpixels (ends up being around 66% less subpixels).
however, the main advantage of the oled displays is that their pixels can be turned off. this means that in movies and games, you have a 'true' black, whereas in led backlit LCD displays (unless it has full led backlight with local dimming) blacks will always seem greyish. oled displays also tend to oversaturate the colours. the other advantage is that since black means the led/pixel is turned off, it means that using a black wallpaper on oled displays will reduce power consumption and improve battery life.
the nexus 7 uses an IPS panel. the general idea is that all the pixels are aligned/parallel, which leads to the image looking sharper compared to TFT and TN panels. the nexus 7 also has a full RGB subpixel matrix which makes it much sharper, and in combination with the IPS setup, it leads to more accurate colour representation. however, as it is not an oled display and it does not have local dimming with a full led backlight (having such a setup would make the device much thicker), it is unable to render 'true' black and as a result, blacks end up looking a bit grey.
cant really say much about which one is better as it is a personal preference thing. some like the oversaturated colours of OLED as it seems more vivid, whereas others prefer the accuracy of IPS panels and sharpness.
at the moment, i own a galaxy note with a pentile amoled display, and i use a 37inch Panasonic TV for my PC display, which uses an IPS panel. i'd say both are pretty good in their own way, but i prefer the IPS panel simply because of the full set of subpixels and colour accuracy.
Waiting to see how hard I rage about the non-black backgrounds.
anandtech measured nexus 7 black at 0.37 nits, whatever that means.
as souai said, it really depends.
generally OLEDs have much better colors and look better, IPS is much better in sunlight though because it's brighter and has insanely good viewing angles up to 178 degrees.
I have a first gen asus transformer which uses and IPS screen and though it's not as impressive color/quality wise as the Galaxy S III and even my Galaxy Nexus (sometimes) it's still excellent and i've never been bothered by it.
and given the fact that the N7 has such a high pixel density it should look great, and the reviews have backed this up.
This isn't apples to apples here but comparing the gnex to the one x I say I definitely prefer the IPS display. Now this is the best version possible probably of its type but I'm happy for the n7 to get an IPS screen. Almost all reviews have talked about how nice it is, only complaint being a little warm and a little dim compared to some other IPS displays. I like my oled screen but since good IPS high res screens have come out, they seem to be superior to oled at the moment. Oled uses up lots of battery in anything other than very black biased setups. IPS has that slight gray to the black but most people are used to their computer monitors and TVs having this as well. I think we won't have to sorry as much about color uniformity as much either with IPS.
Sent from my Galaxy Nexus using xda premium
nvm
thanks for the replies. it's helpful.

Does this phone have an RGB matrix display or a Diamond Pentile display?

I am looking to buy this phone to use with Gear VR. Apparently RGB Amoled displays show less Screen Door Effect (SDE) than Diamond pentile Amoled displays.
Researching the net, some results say it has an RGB display and some say Pentile display. You owners will know for sure so which display tech does it have please?
Also anyone use this phone with the Gear VR headset? Much SDE?
I am pretty sure its is RGB
Pentile, like every samsung amoled displays
tboy2000 said:
I am looking to buy this phone to use with Gear VR. Apparently RGB Amoled displays show less Screen Door Effect (SDE) than Diamond pentile Amoled displays.
Researching the net, some results say it has an RGB display and some say Pentile display. You owners will know for sure so which display tech does it have please?
Also anyone use this phone with the Gear VR headset? Much SDE?
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I use the Gear VR a lot. It's not really noticeable unless you get something of poor quality, then it does become bad especially in bright parts. Games like Dread halls is not noticeable at all for me.

AMOLED and black theme - can prevent burn-in?

Hello.
I just bought Galaxy S8. I know that AMOLED screen really turn off pixels when the colour is black. So, is it true that using black theme can prevent burn-in on AMOLED display?
Why Samsung remove black navbar colour in one of update? I just read that it's possibly connected to burn-in display problem.
OLED screens don’t use powered pixels to create the black color on a display; instead, black pixels are simply pixels that are switched off. This means that activated pixels — that is, the non-black pixels on a display — degrade at a faster rate.
In extreme cases, this can lead to certain parts of the screen becoming lighter than the rest of the display — what we typically refer to as burn-in.
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So, is it safe to use black theme on Galaxy S8? Will it help to avoid or slow down screen burn-in?
I think you're reading that wrong. The quote is saying the NON-black pixels can lead to burn in - they are the ones that degrade faster.
I run my phone as black as I can get to conserve battery. Plus it's easier on the eyes.

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