I usually have a 95%+success rate with the fingerprint scanner at home or under normal conditions. I just noticed that the success rate was significantly lower under direct sunlight which makes me wonder.
Why does light affect a vibration based sensor.
Any feedback about your own experience or any help to better understand the "issue" will be very much appreciated.
If hot weather maybe it dries the skin which then reduces the scanner effectiveness
I live in the desert and the sun is out more often than not and it gets HOT (we've been over 110 for a week now) and I have not had any issues so far. Direct sunlight, in the shade in hot weather. I have not had any failures of the scanner.
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Hey guys!
I have a question to you, owners of the Galaxy S7. As we know from other threads Galaxy S7 uses PWM to control screen brightness. I am interested in this phone and it has been my favourite to buy. I read many reviews and I was really satisfied for what I saw. And then I entered the Notebookcheck's review of S7 and realised what PWM is. As a result... I have very big question mark when it comes to buying this phone. PWM is seem to be a big defect for me, it's hard to believe that such a company can release a phone, which can produce headaches and eye strain or even make flickering visible to some group of people!
Some people say it's a big problem, but reviewers excluding Notebookcheck don't even mention that and say it's a perfect screen. So I have a question to you - what is the truth? Can you see the problem, do you feel bad after using the screen for a long time, is it possible to see flickering at 236 Hz? Thanks in advance for you answers!
No you can't see flickering
You'd have to be super human to see flicking at 236Hz, most PC LCDs are 50-60Hz and you don't see the flickering, florescent lights are 50-60Hz and you can only just see it if the bulb is dying
*Detection* said:
No you can't see flickering
You'd have to be super human to see flicking at 236Hz, most PC LCDs are 50-60Hz and you don't see the flickering, florescent lights are 50-60Hz and you can only just see it if the bulb is dying
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Sorry Detection, but your comparisons fail in this case. What LCD screens have is a 60 Hz refresh rate (or higher for e.g. gaming displays). That means, that the screen content is refreshed/output 60 times a second. But the backlight is not pulsed. It is constantly on. You would really notice a 60 Hz on-off-pulsing of the backlight.
Flourescent lights have an afterglow, and are driven by a 50 or 60 Hz sine wave AC. So it doesn't go off and on instantly.
I own a Galaxy S7 myself and I do notice the flickering. Some people are more sensitive in perception than others. I notice it with different strength in different situations. The dimmer the screen brightness is set, the more it is noticable to me. I assume, it's because of pulse width ratio - the dimmer the brightness is set, the shorter is the on, and the longer is the off time. And it is more noticable to me with bright font on dark backgrounds than the other way round. I'd really say, that this is the biggest disadvantige of Samsung's OLED displays. On my former S3 it was also noticable to me, even stronger due to a lower frequency. But I'd say, I can live with it - I really like the vivid colors of these AMOLEDs on the other hand.
It would be interesting to know if the brightness control of OLED displays of other manufacturers is done the same way, or if there are other techniques existing
Edgar_M said:
Sorry Detection, but your comparisons fail in this case. What LCD screens have is a 60 Hz refresh rate (or higher for e.g. gaming displays). That means, that the screen content is refreshed/output 60 times a second. But the backlight is not pulsed. It is constantly on. You would really notice a 60 Hz on-off-pulsing of the backlight.
Flourescent lights have an afterglow, and are driven by a 50 or 60 Hz sine wave AC. So it doesn't go off and on instantly.
I own a Galaxy S7 myself and I do notice the flickering. Some people are more sensitive in perception than others. I notice it with different strength in different situations. The dimmer the screen brightness is set, the more it is noticable to me. I assume, it's because of pulse width ratio - the dimmer the brightness is set, the shorter is the on, and the longer is the off time. And it is more noticable to me with bright font on dark backgrounds than the other way round. I'd really say, that this is the biggest disadvantige of Samsung's OLED displays. On my former S3 it was also noticable to me, even stronger due to a lower frequency. But I'd say, I can live with it - I really like the vivid colors of these AMOLEDs on the other hand.
It would be interesting to know if the brightness control of OLED displays of other manufacturers is done the same way, or if there are other techniques existing
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You're seriously telling me you can see something flashing at 236 times per second? Sorry but no
I'm one of the persons that if the screens have a low refresh rate I get headaches and get tired, however since long time gone with technology this doesn't happen. I don't have any issue with the phone and use it sometimes hours in a row and for a full load of operations. Car navigation, social messaging, reading news and articles and internet searches. No issue at all for me and it's been a great screen. I use however a 3M privacy film, so it lowers the quality of the screen.
I use this phone in my Gear VR where it is a inch from my eyes and I don't notice any flickering. The screen is great!
It is great, no doubt. But, believe it or not guys, some people do recognize the flickering
Rate this thread to express how well you can see the Samsung Galaxy S9+'s display outdoors. In case you've been playing Minecraft for 18 months straight, you might not known how to get outside anymore. Well, find the door and walk through it. A higher rating indicates that it has very high maximum brightness and thus fantastic outdoor visibility in direct sunlight.
Then, drop a comment if you have anything to add!
Really bright and vivid screen. Super shiny though so at times it can be hard to see the screen because of the reflections.
No viewing issues till date as the screen does crank up very high outdoors.
Outdoor visibility is great especially with Samsung their contrast that changes when it notices your in a bright lit area
These days i'm on the beach and the max brightness kicks in for ~2min from standby then it returns to normal brightness and i struggle to see on the screen. Thats in direct sunlight. I dont know why and how to enable to max when in sunlight.its very disappointing. Its from the heat? I use auto brightness and max brightness kicks in for a couple of min but then it dims and i cant use it . When i adjust the bar it says optimised for sun visibility. But it clearly isnt. All this in normal use.browsing ,some photos,whatsapp...
So for me its disapointing. This is when i need the max brightness most and it let me down
Been using the phone for over a year now in a Tropical Country and even in direct sunlight I have absolutely no issues with the brightness. The phone automatically cranks the display upto it's full potential when it senses a bright environment. Really can't expect it to be any better.
Rate this thread to express how well you can see the Xiaomi Mi 9's display outdoors. In case you've been playing Minecraft for 18 months straight, you might not known how to get outside anymore. Well, find the door and walk through it. A higher rating indicates that it has very high maximum brightness and thus fantastic outdoor visibility in direct sunlight.
Then, drop a comment if you have anything to add!
The display is so bright outside that it is a bit too bright. I sat under a beach umbrella in the shade and wanted to push the slider back to 80% but he went back to 100%. I tried it 3 times but the slider did not stay there. then I had to turn off the automatic brightness.
I give 5 stars, because I did not have such a bright screen yet.
No worries that I could not see anything on my mobile phone in the sunlight.
I would wish that the slider remains at 80% if I push it there manually.
If you are coming from LCD you notice straight away how vibrant and bright the colors are. No problems whatsoever (even with sunglasses on).
Mi9-the best phone on the market!
Execllent
I think it's a bit too low, fortunately on MIUI the auto contrast feature helps a lot
I like the phone and really want to buy it. However, one thing that keeps me hesitant is PWM on this phone. It’s actually lower than P6 pro had https://9apps.ooo/
I would really appreciate to hear some feedback from those who bought it and use it 5+ hrs SOT daily.
How does the display feels on your eyes in general ? How your eyes feel after reading in complete darkness or candle light for a while ?
lanesmang said:
I like the phone and really want to buy it. However, one thing that keeps me hesitant is PWM on this phone. It’s actually lower than P6 pro had
I would really appreciate to hear some feedback from those who bought it and use it 5+ hrs SOT daily.
How does the display feels on your eyes in general ? How your eyes feel after reading in complete darkness or candle light for a while ?
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First, not sure what PWM is and as for how it affects people's eyes is relative to each person's eyes. Not to mention screen settings are customizable per each person's preferences
By PWM do you mean Pulse Width Modulation ? That should not be a problem on any display as long as you don't have extreme high speed eyes.
Maybe refresh rate but starting with 60 hz it also should be easy on eyes, besides you can use 120 hz which is extremely smooth.
As a "wake up early and play with phone" fella I do not have any problems with flickering light or refresh rate.
I haven't had any issues with this phone but I don't seem to be PWM sensitive anyway.
There is far far more to it than just the PWM frequency! The "common" thought on this is that the LEDs are ON for the ON phase of the PWM cycle, and OFF for the OFF phase, but this isn't actually the case because the circuitry and LED cells have *capacitance*, which basically means that they smooth out the pulses, allowing them to blend together and not actually flicker.
Yes, some really really crappy screens will flicker, but these aren't those. The PWM frequency set will account for the capacitance of the circuits.
Disregarding reflections... How many nits does a mobile screen need for [for example] Google Maps to be perfectly visible under direct sunlight?
It's not just brightness but gamma as without boosting the colors they will look "washed out" in direct sunlight.
On some Samsung's you can set from "natural" to "vivid" for bright ambient light.
Meanwhile you're cooking your AMOLED, knocking hundreds or even thousands of hours off it's lifespan. Very hard on the battery too.
None. Eink.
Renate said:
None. Eink.
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E-ink is nice, but I just mentioned google maps as an example. I want to be able to see all my android apps in bright sunlight without having to find a shade.
white-k said:
E-ink is nice, but I just mentioned google maps as an example. I want to be able to see all my android apps in bright sunlight without having to find a shade.
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I limit time in direct sunlight to seconds as it's literally burning up pixels, battery and SOT.
One hot running session in direct sunlight can degrade an Li battery or worse. So even if you plan to replace the device every year you may still face issues.
white-k said:
E-ink is nice, but I just mentioned google maps as an example.
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Eink is nice and I just showed (my own) mapping app in Android as an example.
Stop beating around the bush. Someone please write an actual nits value.
Generally, a brightness level of around 1000 -1500 nits must be sufficient for outdoor usage even under direct sunlight but there are a few high-end smartphones and tabs that come with over 2000 nits which are designed for the sole purpose of using under direct sunlight.
But it is also worth noting that, the brightness of a display alone may not be sufficient to ensure good visibility in direct sunlight. There are other factors which also affect outdoor visibility like anti-glare coatings, polarization filters, and high contrast ratios.
nancymary101 said:
Generally, a brightness level of around 1000 -1500 nits must be sufficient for outdoor usage even under direct sunlight but there are a few high-end smartphones and tabs that come with over 2000 nits which are designed for the sole purpose of using under direct sunlight.
But it is also worth noting that, the brightness of a display alone may not be sufficient to ensure good visibility in direct sunlight. There are other factors which also affect outdoor visibility like anti-glare coatings, polarization filters, and high contrast ratios.
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Click to collapse
Thank you for a very good response!