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i haven't seen any complaints about ghosting so it may just be my phone but i have it really bad.
it's very visible when i scroll through my home screens because i have a near black background and use the red and white data widget.
it also makes text and such look horrid when i scroll through menus or web pages
deyna said:
i haven't seen any complaints about ghosting so it may just be my phone but i have it really bad.
it's very visible when i scroll through my home screens because i have a near black background and use the red and white data widget.
it also makes text and such look horrid when i scroll through menus or web pages
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You probably have the brightness set extremely high or extremely low.
Whenever CM7 comes out for the D3, you can try adjusting render settings to improve the overall gamma of the screen. I'm guessing you're just more sensitive than most to a high-persistence screen, unless you have found a way to monkey with your refresh rate
rynosaur said:
You probably have the brightness set extremely high or extremely low.
Whenever CM7 comes out for the D3, you can try adjusting render settings to improve the overall gamma of the screen. I'm guessing you're just more sensitive than most to a high-persistence screen, unless you have found a way to monkey with your refresh rate
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i've got a friend who has the same phone so i'll see if his is the same.
i haven't messed with the screen settings at all and have it set to auto brightness.
my last phone was the Nexus S with it's s-amoled screen. does this screen have a lower refresh rate then it did?
i know normal monitors have about a 60hz refresh rate but i know nothing about smart phone screens.
deyna said:
i've got a friend who has the same phone so i'll see if his is the same.
i haven't messed with the screen settings at all and have it set to auto brightness.
my last phone was the Nexus S with it's s-amoled screen. does this screen have a lower refresh rate then it did?
i know normal monitors have about a 60hz refresh rate but i know nothing about smart phone screens.
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You've got me on the specs. I know desktop LCDs/LEDs are capable of higher refresh rates, but those aren't necessary for regular applications (read: non-bluray, non/gaming). Not sure where a smartphone like the D3 would land in the gamut between 29mhz and 120mhz.
deyna said:
i haven't seen any complaints about ghosting so it may just be my phone but i have it really bad.
it's very visible when i scroll through my home screens because i have a near black background and use the red and white data widget.
it also makes text and such look horrid when i scroll through menus or web pages
Click to expand...
Click to collapse
I've got a little...not exactly ghosting, but similar...on mine. It seems to me that the display controller for the pentile screen isn't outputting all of the color channels at the same time, so i end up with a red fringe or bloom around objects scrolling across the screen. Hopefully, a firmware update for the chip can fine-tune things.
rynosaur said:
You've got me on the specs. I know desktop LCDs/LEDs are capable of higher refresh rates, but those aren't necessary for regular applications (read: non-bluray, non/gaming). Not sure where a smartphone like the D3 would land in the gamut between 29mhz and 120mhz.
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hmh i wish.
29mhz would be 29,000,000 refreshes per second XD
on computer monitors 60hz has been the norm for a long time. all my old CRTs use it. the newer 3d tvs and such generally need a 120hz refresh rate at the least.
even my dell inspiron 1420 has an lcd with a 60hz refresh rate and it can play bluray.
i remember there being one phone not too long ago that was limited to 30hz and most didn't like that one bit.
Xenoproctologist said:
I've got a little...not exactly ghosting, but similar...on mine. It seems to me that the display controller for the pentile screen isn't outputting all of the color channels at the same time, so i end up with a red fringe or bloom around objects scrolling across the screen. Hopefully, a firmware update for the chip can fine-tune things.
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you may be right. i'll check another phone or two and if they have the same problems i'll just hope that an update or rom can fix it.
FYI: this has not that much to do with refresh rate, but more with response time. Response times are displayed in milliseconds most of the time.
For example, my uber-gaming-tft-display has a 2 milliseconds response time, which is very low and has almost no ghosting.
So, the question is: what is the response time of the qHD display in the droid 3.
I noticed the ghosting is way more visible on black backgrounds than on white. Good thing motorola changed the background in the android menu's from the default black to white.
I have noticed the ghosting too but have to admit that I actually like it. Especially while playing Emulators like FPSE and Gameboid it brings back the real PSP feeling. I know, its a weird oppinion.
rvschuil said:
FYI: this has not that much to do with refresh rate, but more with response time. Response times are displayed in milliseconds most of the time.
For example, my uber-gaming-tft-display has a 2 milliseconds response time, which is very low and has almost no ghosting.
So, the question is: what is the response time of the qHD display in the droid 3.
I noticed the ghosting is way more visible on black backgrounds than on white. Good thing motorola changed the background in the android menu's from the default black to white.
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It's definitely got a slower rise-time than fall-time. You can see it on monochromatic icons when scrolling the app drawer in a launcher that uses a black background -- the leading edge is a blurry mess, while the trailing edge is fairly crisp. I'm guessing that the display controller simply isn't using any kind of overdriving to improve response time.
Also, to clarify my previous characterization of the blurring, it appears not so much that the red channel specifically is updating faster, as it is that the white channel is updating slower than all of the RGB channels.
Refresh rate has nothing to do with ghosting. Nearly every TV is actually 60, but they are falsely advertised at 600(plasmas) or use frame interpolation to achieve refresh rates above 60hz(LCD.) The only exceptions are 3D TVs. They actually refresh at 120 hz in 3D mode. Each eye sees 60hz. If they stayed at 60hz, each eye would see 30hz, and there would be noticeable flickering.
What effects ghosting is response time-the amount of time it takes a pixel to respond to a change in state. In layman's terms, how quickly it can go from one color to the next.
Plasmas and CRTs have near instant response times-it takes just nanoseconds for a pixel to change(actually, green phosphors take about 1 millisecond to change, blue and red phosphors change in nanoseconds). Nonetheless, plasmas and CRTs simply don't ghost(which is one reason why I prefer Plasma TVs). Part of this is because the pixels produce their own light. There is no backlight like an LCD.
But on LCDs, it takes the pixels many milliseconds to change. Though they are advertised between 2-6ms, the true response time of an LCD is usually at least 20 milliseconds. The Retina Display and qHD displays ghost because they have response times of 25-30ms. I can't recall why right now, but when you pack in a ton of pixels on a small screen, the response time is extremely high.
The refresh rate on phone screens is 60hz, which is actually why most are capped at 60fps, or you would probably see screen tearing.
GoogleAndroid said:
Refresh rate has nothing to do with ghosting. Nearly every TV is actually 60, but they are falsely advertised at 600(plasmas) or use frame interpolation to achieve refresh rates above 60hz(LCD.) The only exceptions are 3D TVs. They actually refresh at 120 hz in 3D mode. Each eye sees 60hz. If they stayed at 60hz, each eye would see 30hz, and there would be noticeable flickering.
What effects ghosting is response time-the amount of time it takes a pixel to respond to a change in state. In layman's terms, how quickly it can go from one color to the next.
Plasmas and CRTs have near instant response times-it takes just nanoseconds for a pixel to change(actually, green phosphors take about 1 millisecond to change, blue and red phosphors change in nanoseconds). Nonetheless, plasmas and CRTs simply don't ghost(which is one reason why I prefer Plasma TVs). Part of this is because the pixels produce their own light. There is no backlight like an LCD.
But on LCDs, it takes the pixels many milliseconds to change. Though they are advertised between 2-6ms, the true response time of an LCD is usually at least 20 milliseconds. The Retina Display and qHD displays ghost because they have response times of 25-30ms. I can't recall why right now, but when you pack in a ton of pixels on a small screen, the response time is extremely high.
The refresh rate on phone screens is 60hz, which is actually why most are capped at 60fps, or you would probably see screen tearing.
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very informative, thank you! i knew what response times are but for some reason didn't draw the line between that knowledge and ghosting.
that would also explain why it's so noticeable to me after using the Nexus S for 9 months. hopefully (though unlikely) a new phone will come out here soon with a keyboard and high res screen with good response time.
Hello,
Recently got this phone and very happy with it. Only issue I have found is that the screen occasionally dims randomly, not by a lot, but noticeable when it happens.
Adaptive brightness is off. System mode is set to dynamic.
Is dynamic system mode the issue? If so which is a good adaptive battery setting which won't affect the screen brightness.
Thanks in advance
I assume its due to the changes in refresh rate. Try setting the refresh rate to a single value (120 90 or 60) and i think you wont see the transition.
Same issue and I have adaptive brightness on. You will open an app and suddenly brightness will turn all the way down. Definitely a bug.
hirshr said:
I assume its due to the changes in refresh rate. Try setting the refresh rate to a single value (120 90 or 60) and i think you wont see the transition.
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Thanks for the suggestion. I've tried this at 90hz, for reasonable battery, but it still does it.
Same here! Locked at 90hz, so that's not the problem.
I'm having the same issue. Adaptive brightness off, fixed refresh rate. I've only noticed it when I'm outside in bright light.
same problem.
have zenfone 7 rooted. locked to 90hz. adaptive brightness switched off.
anyone found a solution or cause?
I've noticed it happens when i tilt the phone.
and also when i have an app overlaid over main screen. like YouTube vanced minimised etc.
i think phone somehow might be switching brightness between the small app at the front and the main app on the back and doing it back and forth.
Once the screen changes to 60hz and if you then where to rotate the screen without touching it, it will remain at 60hz during the rotation and look slightly laggy.
Exynos / OneUI 4.0
Proof: Laggy Stuff
TLDR: The screen should change to 120hz during the rotation.
Samsung, plz fix.
Welcome to XDA
Lol, slow screen rotation is a Samsung trademark
It's not a 60hz thing per se. May have to do will the sensor refresh rate at least on fixed display rate devices.
blackhawk said:
Welcome to XDA
Lol, slow screen rotation is a Samsung trademark
It's not a 60hz thing per se. May have to do will the sensor refresh rate at least on fixed display rate devices.
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No it is a 60hz thing, the screen does not boost to 120hz when a rotation is happening. You can check this by using a system FPS overlay.
Mine changes to 120 on screen rotation. It is very very brief but it definitely happens...
jakemog said:
No it is a 60hz thing, the screen does not boost to 120hz when a rotation is happening. You can check this by using a system FPS overlay.
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I'm facing the same problem, maybe reducing the refresh rate helps it?
I just tried to replicate the issue on my phone as follows:
Opened a web page and when i was scrolling around, refresh rate was 120.
Stopped scrolling and refresh rate dropped to 60.
Without touching the screen, I rotated the phone and refresh rate goes up for a split second to 120, then as soon as rotation is complete, it dropped back to 60, untill I touched the screen again.
Tried this multiple times, and it's a reproducible behaviour.
I think it's working as intended. As the screen rotates, refresh rate ramps up to 120, making the rotation animation smooth, then it drops back down again to its previous state. I wasn't able to produce any lag during the screen rotation in my tests. It's very smooth.
I tried screen recording this behaviour but turning on screen recorder locks the screen to 60Hz and can't see the changes in refresh rate. One would need to record the screen with another camera/device to show the behavious I've described above.
enigmaamit said:
I just tried to replicate the issue on my phone as follows:
Opened a web page and when i was scrolling around, refresh rate was 120.
Stopped scrolling and refresh rate dropped to 60.
Without touching the screen, I rotated the phone and refresh rate goes up for a split second to 120, then as soon as rotation is complete, it dropped back to 60, untill I touched the screen again.
Tried this multiple times, and it's a reproducible behaviour.
I think it's working as intended. As the screen rotates, refresh rate ramps up to 120, making the rotation animation smooth, then it drops back down again to its previous state. I wasn't able to produce any lag during the screen rotation in my tests. It's very smooth.
I tried screen recording this behaviour but turning on screen recorder locks the screen to 60Hz and can't see the changes in refresh rate. One would need to record the screen with another camera/device to show the behavious I've described above.
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Do you have Exynos or QC?
Doing the same thing I can reproduce not boosting to 120hz during rotation, I can post video as proof.
Video added in original post.
jakemog said:
Do you have Exynos or QC?
Doing the same thing I can reproduce not boosting to 120hz during rotation, I can post video as proof.
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Exynos.
Did the test on BUK8.
Just upgraded to BUKG.
enigmaamit said:
Exynos.
Did the test on BUK8.
Just upgraded to BUKG.
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Well that doesn't make any sense, can you post a video?
AlienTekOriginal said:
Well that doesn't make any sense, can you post a video?
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Here you go... S21 ultra screen rotation
Duplicate post
enigmaamit said:
Here you go... S21 ultra screen rotation
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Well that makes no sense, great
Is it true that if you use anti flicker option on this phone, the display refresh rate will be stuck at 60hz? Anybody can confirm? Thanks!
Yes, the MIUI will set the refresh rate to 60Hz automatically when you enable anti flicker. There's even a prompt warning you about this.
Hello,
When i stop scrolling in white themes , the screen become slighty (light) blue, i can not see it with my Poco F3 ...
Why?
It happens when its going to 60 hz refresh rate..
Does flickering issue exist on everyone?
I read a comment on gsm arena that an owner experiences the flickering issue of the device at high brightness. Is it the same to other owners?
forum.xda-developers.com
my device is not roted ^^