iPhone X The iPhone X is using AMOLED, so what is the PWM frequency?

Discussion in 'iPhone' started by thinkcatgame, Nov 5, 2017.

  1. thinkcatgame macrumors newbie

    thinkcatgame

    Joined:
    Nov 19, 2016
    #1
    The iPhone is using the AMOLED, just like the Samsung. And Samsung's smartphone are using the PWM method to adjust the brightness of the screen, and with a rather low frequency about 240Hz~250Hz, and this makes many customers complain about the 'eye strain problem'. So did anyone down the PWM frequency that iPhone X is using?
    --- Post Merged, Nov 5, 2017 ---
    did anyone know this?
     
  2. changguangyu macrumors newbie

    changguangyu

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    Sep 15, 2017
  3. BasicGreatGuy Contributor

    BasicGreatGuy

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    Location:
    In the middle of several books.
    #3
    Apple is using a custom screen that they designed, if I am not mistaken. I don't believe the specifics of said screen has been publicly published, yet.
    --- Post Merged, Nov 5, 2017 ---
    Worthless post.
     
  4. Jodiuh macrumors 6502

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    #4
  5. Act3 macrumors 68000

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    Sep 26, 2014
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    USA
    #6
    thanks, time to fire up spotify... havent heard that in a while
     
  6. davevvv macrumors newbie

    davevvv

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    Nov 28, 2017
    #7
    I give up on Samsung phones and TV's years ago because of PWM. It was basically frying my eyes and causing major headaches.

    It's my understanding that companies implement PWM to decrease brightness because it's cheap. I'm not sure why they think flashing the screen at someone's eyes is a good idea but they do it.

    I have an iPhone 8 Plus and I can read on it for hours. I recently picked up a Samsung Galaxy 8 while visiting best buy and within 5-10 minutes my eyes started to water. It's a beautiful phone but it is simply unusable with the low frequency PWM.

    https://www.notebookcheck.net/Apple-iPhone-X-Smartphone-Review.264436.0.html
     
  7. SlimFit macrumors newbie

    SlimFit

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    Sep 29, 2016
    #8
    Do you or anyone know if anti glare or privacy screen protector help with that? My eyes are sensitive to it as well, causing headaches
     
  8. Jodiuh macrumors 6502

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    Sep 15, 2009
    #9
    nope
     
  9. Wowereit macrumors 6502a

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    Feb 1, 2016
    Location:
    Germany
    #10
    German site notebookcheck measured the same, although they seem to differentiate between PWM and simple 'flickering'.

    The PWM brightness regulation is another typical characteristic of an OLED panel, and this is the case for the iPhone X as well. We can measure a comparatively low frequency of 240 Hz as soon as the luminance is at 50% or below. Sensitive users should get the iPhone 8 / 8 Plus with an LC display, where we did not determine PWM. In addition to the 240 Hz PWM, we can also measure a slight flickering at 60 Hz (see screenshots below) at higher brightness levels (even at the maximum).

    https://www.notebookcheck.net/Apple-iPhone-X-Smartphone-Review.264436.0.html
     
  10. newellj macrumors 603

    Joined:
    Oct 15, 2014
    Location:
    Boston, MA, US
    #11
    I was going to mention NotebookCheck and the Russian review linked above.

    *BUT* frequency is not everything - amplitude matters a lot. Go to the NotebookCheck review of the Samsung Note 8 and compare to the iPhone X. Relatively low frequencies, which you would expect to be more troublesome, can be ignored by some people if the amplitude is shallow.
     
  11. Jodiuh macrumors 6502

    Joined:
    Sep 15, 2009
    #12
    Thanks, those guys are great. They've actually replied to my emails. :D

    I ended up with an 8 Plus and I couldn't be happier. The screen is FAR FAR wider when viewing in portrait and the corners are not round, lol.

    Way over my head, but thanks for the info. :0
     
  12. ultravegeta1981 macrumors regular

    ultravegeta1981

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    Oct 12, 2017
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    Turkey
    #13

    This is exactely what i was experiencing. Never knew why my eyes hurt before,since the iphone X eyestrain topic. Watery eyes,painful eyes etc. Now very happy and pain free with my iphone 8 lcd display.
     
  13. newellj macrumors 603

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    Oct 15, 2014
    Location:
    Boston, MA, US
    #14
    A picture is worth 10K words. Go to the NotebookCheck review of the Samsung Note 8 and go to the Display section. There are a few screenshots showing PWM applied by Samsung on that phone. Look at the full brightness shot and you'll understand what I was trying to say immediately, I think. :)
     

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