Database Info

DC dimming

I am interested in getting either this phone or the regular one plus 7, but I have horrible time using a oled screen due to pwm. I suffer from severe headaches and eye strain.
So Im wondering if there is anyone else out there that suffers like I do, is using this phone and does dc dimming actually help?
Please if you dont know what pwm is or if it's not a problem for you Dont Comment.
I appreciate any help you can give.
Thank you!

I wonder if the 90Hz refresh would help....

I don't have that issue while using dc dimming but if i turn it off, after about 5 min i do notice my eyes hurting and stuff. DC dimming only works when the brightness is very low (i believe)

Hi, I know the thread is old but I wanted to share my views about this topic.
I am one of the few people who are sensitive to PWM flicker used in OLEDs. Before I switched to OP7 Pro, I had OP3. OP3 display destroyed my eyes and i came to know that PWM was the cause of my eye discomfort and headaches.
I switched to OP7 Pro as it had DC dimming which reduces the discomfort to PWM sensitive users. And to a huge extent this has helped me with the discomfort. But I still get headaches after prolonged viewing of the screen so I take frequent breaks and avoid extensive reading on the phone.
I have done some research about OP7 Pro display and turns out that PWM frequency is around 350hz (the more the better) when the screen is kept at 90Hz refresh rate and around 150hz PWM frequency at 60 Hz refresh rate. SO it is advised to keep display at 90Hz. All other phones have roughly 250Hz PWM frequency. Also, our phone’s display uses PWM when brightness drops below 50% which is really good as some other OEMS use PWM brightness control below 95% display brightness. So I keep the DC dimming on and use the phone at low brightness. I also use an app called OLED saver though I dont know whether it is redundant as it does same thing as DC dimming.
Recently I started noticing something after upgrading to OOS Android 10. I noticed that DC dimming implementation is different on OOS android 10 than on OOS android 9. I started getting headaches and eye discomfort on OOS android 10. I noticed that the PWM flicker is much more evident on OOS 10 .I used camera pro mode on another phone and reduced the shutter speed to 1/1000th and viewed OP7P screen through it. The flicker was evident. So I reverted back to OOS 9 and the discomfort was greatly reduced. I think I will stay on OOS 9 for the future
There is one thing I am very clear about is that all the OLED screen phones nowadays use PWM brightness control and even if DC Dimming is implemented the OLED screen will still flicker slightly. And if anyone is very sensitive to PWM then buy LCD screen phones. It’s the only option

Same Problem
daninantro said:
Hi, I know the thread is old but I wanted to share my views about this topic.
I am one of the few people who are sensitive to PWM flicker used in OLEDs. Before I switched to OP7 Pro, I had OP3. OP3 display destroyed my eyes and i came to know that PWM was the cause of my eye discomfort and headaches.
I switched to OP7 Pro as it had DC dimming which reduces the discomfort to PWM sensitive users. And to a huge extent this has helped me with the discomfort. But I still get headaches after prolonged viewing of the screen so I take frequent breaks and avoid extensive reading on the phone.
I have done some research about OP7 Pro display and turns out that PWM frequency is around 350hz (the more the better) when the screen is kept at 90Hz refresh rate and around 150hz PWM frequency at 60 Hz refresh rate. SO it is advised to keep display at 90Hz. All other phones have roughly 250Hz PWM frequency. Also, our phone’s display uses PWM when brightness drops below 50% which is really good as some other OEMS use PWM brightness control below 95% display brightness. So I keep the DC dimming on and use the phone at low brightness. I also use an app called OLED saver though I dont know whether it is redundant as it does same thing as DC dimming.
Recently I started noticing something after upgrading to OOS Android 10. I noticed that DC dimming implementation is different on OOS android 10 than on OOS android 9. I started getting headaches and eye discomfort on OOS android 10. I noticed that the PWM flicker is much more evident on OOS 10 .I used camera pro mode on another phone and reduced the shutter speed to 1/1000th and viewed OP7P screen through it. The flicker was evident. So I reverted back to OOS 9 and the discomfort was greatly reduced. I think I will stay on OOS 9 for the future
There is one thing I am very clear about is that all the OLED screen phones nowadays use PWM brightness control and even if DC Dimming is implemented the OLED screen will still flicker slightly. And if anyone is very sensitive to PWM then buy LCD screen phones. It’s the only option
Click to expand...
Click to collapse
Actually I am facing the same problem I can't look at the phone more than 10 minutes
and installed "OLED saver" and nothing happened the same problem
I was wondering is this a problem my eyes with all AMOLED displays or it's just Oneplus only ?

Planning to buy this device have some questions.

I am planning to buy this device but I fear of some major issues normally exist with xiaomi devices and as well I know xiaomi it is expert in ignoring it or fixing it. Still I want to go with xiaomi again because I have learnt everything about its boot-loader unlocking and rooting.
I have redmi 3s and it suffers very serious problems like low fps stuttery video, Low data download speed even coverage, hoooooooorible audio recording quality. ( I should not complain about how much it gets hot as it comes with pretty mediocre chipest)
My friends also informed me about dead pixel issues. Even I have replaced my screen once.
I just want to keep running 4 apps at once with no heating or lag.
Is there any serious bug or issues with this device that I should know before buying this.

there is very minor screen bleeding which is not noticeable untill and unless you stare for a few seconds near the punch hole. No dead pixels for me. Multitasking is good easily handles a browser and few apps in the background. the main con with this device is the battery backup. if you are planning to use this device on 120hz then be ready to juice up your device atleast 2 times a day for me it is close to 4.

Umm fps in this X2 is around 50-60 fps in gaming and according to me camera fps is related to camera if company claims 960 fps then I will give but quality suffer sometimes ...and seriously I see many user compaling about battery it has 120hz screen with around 6.67 inch it's good that device is giving 5-6.5 hr continues gaming and if without gaming it can run for 1 day ver easily ( I play game for about 1-1.5 hr and I charged daily morning .. and heating is very common in all device but it can prevent by taking some steps like don't use while charge ... (Seriously I never feel any heating issue)

Question Refresh Rate Lowering To 60Hz

Hello everyone.
I bought Xperia 5 III about 3 days ago. While playing PUBG Mobile or other games, the device reduces the refresh rate to 60hz even though it hardly gets hot. Is there a setting we can do to prevent this? For example, when you delete the software called Battery & Performance on MIUI devices, such problems did not occur.

I don't really play games but I noticed the overall UI seems smoother with high refresh rate off. Scrolling long feeds even YouTube is stuttering.once it's on 60hz everything is smooth. Can't explain it.

Hizerxd said:
Hello everyone.
I bought Xperia 5 III about 3 days ago. While playing PUBG Mobile or other games, the device reduces the refresh rate to 60hz even though it hardly gets hot. Is there a setting we can do to prevent this? For example, when you delete the software called Battery & Performance on MIUI devices, such problems did not occur.
Click to expand...
Click to collapse
I recently upgraded my 5 II to a 5 III and although I still don't wanna believe it, it's getting pretty obvious that the phone throttles the FPS from 120 to 60 Hz. The Xperia 5 II only did this sometimes when you were charging and gaming simulatenously.
However with the 5 III it sometimes tends to throttle just when you are surfing through the net or using some apps. During gaming without charging it also throttles often.
teostar said:
I don't really play games but I noticed the overall UI seems smoother with high refresh rate off. Scrolling long feeds even YouTube is stuttering.once it's on 60hz everything is smooth. Can't explain it.
Click to expand...
Click to collapse
That's the second time I read about 60 Hz feeling smoother but for me it's just so much worse.

illyx said:
I recently upgraded my 5 II to a 5 III and although I still don't wanna believe it, it's getting pretty obvious that the phone throttles the FPS from 120 to 60 Hz. The Xperia 5 II only did this sometimes when you were charging and gaming simulatenously.
However with the 5 III it sometimes tends to throttle just when you are surfing through the net or using some apps. During gaming without charging it also throttles often.
That's the second time I read about 60 Hz feeling smoother but for me it's just so much worse.
Click to expand...
Click to collapse
This could be an issue that will be fixed soon. Other than that, one of the best things to do if you're a gamer like me is to get a very good cooler.

teostar said:
I don't really play games but I noticed the overall UI seems smoother with high refresh rate off. Scrolling long feeds even YouTube is stuttering.once it's on 60hz everything is smooth. Can't explain it.
Click to expand...
Click to collapse
Actually, this is a case of eye habit. If you used a device or monitor with a refresh rate above 60Hz before, when you use 60Hz again after a long time, it seems like it lags etc. But since you haven't used a panel above 60Hz so far, 60Hz seems very different to you.

illyx said:
I recently upgraded my 5 II to a 5 III and although I still don't wanna believe it, it's getting pretty obvious that the phone throttles the FPS from 120 to 60 Hz. The Xperia 5 II only did this sometimes when you were charging and gaming simulatenously.
However with the 5 III it sometimes tends to throttle just when you are surfing through the net or using some apps. During gaming without charging it also throttles often.
That's the second time I read about 60 Hz feeling smoother but for me it's just so much worse.
Click to expand...
Click to collapse
It's because the 5mk3's Snapdragon 888 generates far more heat than the 5mk2's Snapdragon 865.

Question How is the PWM of the screen? (Screen flicker)

Anyone was able to measure PWM values? Is it as bad as 6 Pro?

Seems like now it have 240 hz
Google Pixel 7 Pro Display test - DXOMARK
We put the Google Pixel 7 Pro through our rigorous DXOMARK Display test suite to measure its performance across six criteria. In this test summary, we will break down how it fared in a variety of tests and several common use cases. Overview Key display specifications: 6.7 inches OLED (~89.6%...
www.dxomark.com

This is crushing news. I'm one of those people that are susceptible to headaches from low Hz flicker. I was going to go for the P7 pro but this is a non starter for me if it's true. Anyone else that got the phone and has pwm headaches or eye strain please comment

(maybe this is a noob question)
Can this be somehow solved by a custom kernel that would make the phone use DC dimming instead of PWM?

In my experience (with previous phones) DC dimming makes no difference. It took some time for me to understand what flicker value would impact me. It seems that anything under 350 or so give me headaches. From what I understand this varies from person to person with about 5% of people being affected negatively. I can't actually see the flicker but after about 5 minutes of using a screen that las a low rate, I develop a headache. I can't read in cars either. It offsets the same feeling in me.

How come DC dimming makes no difference, when DC dimming doesn't use PWM (flicker)?

JULIUS_PONOZKA said:
How come DC dimming makes no difference, when DC dimming doesn't use PWM (flicker)?
Click to expand...
Click to collapse
I'm not sure about the science behind it. I'm just giving my personal experience. I tried to upgrade my op 8 pro to a op 9 pro last year. As it turns out the op9 pro also has a low flicker rate. It also had the ability to enable DC dimming. It didn't fix my problem. I sent it back.

Question Galaxy Max Hz equivalent for Pixel?

I used to use Galaxy Max Hz (https://forum.xda-developers.com/t/...ods-qs-tiles-tasker-support-and-more.4220481//) on my rooted S21 Ultra, which is a great app that allows the screen at standstill to be reduced to 10hz before immediately ramping back up to 120hz (or any other step up you liked - I set mine to 90hz as the difference wasn't overly noticeable) if you touched the screen resulting in scrolling or movement. Is there an equivalent on the Pixel, do you know? I'm very happy with the battery life, but reckon something like this would improve it further.

Beefheart said:
I used to use Galaxy Max Hz (https://forum.xda-developers.com/t/...ods-qs-tiles-tasker-support-and-more.4220481//) on my rooted S21 Ultra, which is a great app that allows the screen at standstill to be reduced to 10hz before immediately ramping back up to 120hz (or any other step up you liked - I set mine to 90hz as the difference wasn't overly noticeable) if you touched the screen resulting in scrolling or movement. Is there an equivalent on the Pixel, do you know? I'm very happy with the battery life, but reckon something like this would improve it further.
Click to expand...
Click to collapse
I'm guessing, but I'm thinking the answer is no, the Pixel screen only varies between 60-120. I tried ADB commands to choose 96 as the high but it fails. I use that app on my S22 Ultra and works great. I haven't seen any negative battery effects of letting it do it's thing up to 120. (So far).

I believe the screen varies from 10Hz-120Hz but only hits 10Hz in certain situations (e.g. When content is static with good ambient lighting). The refresh rate in Developer Options uses SurfaceFlinger, but SurfaceFlinger doesn't read below 60Hz and you need to use the Display Controller or some other means (as done below) to read below that, is my understanding.
This is from the Pixel 6 Pro, but the concept should still be the same for the Pixel 7 Pro...
https://twitter.com/i/web/status/1498870947272556546
There is also this...
https://www.reddit.com/r/GooglePixel/comments/rn5wrp

zoman7663 said:
I'm guessing, but I'm thinking the answer is no, the Pixel screen only varies between 60-120. I tried ADB commands to choose 96 as the high but it fails. I use that app on my S22 Ultra and works great. I haven't seen any negative battery effects of letting it do it's thing up to 120. (So far).
Click to expand...
Click to collapse
According to the gsmarena:
For refresh rate, you get a single toggle in the settings menu called 'Smooth Display', which enables the 120Hz mode. The thing is, despite the official specsheet listing the display as being able to adjust refresh rate in the 10-120Hz range, Android only reports 120Hz and 60Hz modes, both in the Display.Mode class and while the phone is in use with the 'Show refresh rate' utility turned on in Developer options. So while it's somewhat adaptive and will switch from 120Hz down to 60Hz for static content or when you're not touching the display, other refresh rates don't appear to be used (or supported). That's quite perplexing.
Click to expand...
Click to collapse
As they advertised variable refresh rate it should be possible. I'm not sure why it hasn't been implemented yet but hopefully they will do it.

That's a bit irritating, but less than it might have been given the battery life (for me at least) is more than good enough.

I just set adb force min, and max 24, and it's forced to full all the time. ZERO issues with batt life

I used to use the Samsung max hz app myself and found it great. Best I've done so far on the P7P is dev options and force max hz. Seems to be working for me so far