iPhone XS Does XR have PWM? (For people w sensitive eyes)

Discussion in 'iPhone' started by thadoggfather, Oct 25, 2018.

  1. Vermifuge macrumors 68000

    Vermifuge

    Joined:
    Mar 7, 2009
    #2
    OLED (and its versants) not LCD use PWM (or a combination of PWM and other techniques) for screen dimming
     
  2. Jimmy James macrumors 601

    Jimmy James

    Joined:
    Oct 26, 2008
    #3
    Nope. If you're sensitive to pwm the XR is the only new iPhone option.
     
  3. JPack macrumors 68040

    JPack

    Joined:
    Mar 27, 2017
    #4
    Already confirmed no by a MacRumors editor on Reddit. He recorded video at about 1/3 brightness and no flickering was visible.
     
  4. blackberrycubed macrumors 6502a

    Joined:
    Feb 26, 2013
    #5
    was it in slow mo ?
     
  5. bodonnell202 macrumors 65816

    bodonnell202

    Joined:
    Jan 5, 2016
    Location:
    Calgary, Alberta, Canada
    #6
    Technically LCD screens also use PWM, but LCDs use high frequency PWM, whereas OLED screens use low frequency PWM and it is low frequency PWM that causes issues for those that are sensitive to it.
     
  6. Hieveryone macrumors 68040

    Joined:
    Apr 11, 2014
    #7
    What is a pwm? Is it good and do I have it?

    I have the iPhone X AT&T version. Also, it is the 64GB one.

    Someone please let me know. Thanks!!!
     
  7. aakshey macrumors 68000

    aakshey

    Joined:
    Jun 13, 2016
    #8
    IPad Pro 2017 has PWM. Irritates the crap outta me. Can’t use without TrueTone. With TrueTone on it’s fine. Same with X. I’m sure XR is likely to be the same too.

    No issues with iPad 6th gen though.
     
  8. apolloa macrumors G4

    Joined:
    Oct 21, 2008
    Location:
    Time, because it rules EVERYTHING!
    #9
    If memory serves, PWM is Pulse Width Modulation.
    I guess it has to do with the screen refresh rates on phones? Or the rate the backlights flash?
     
  9. stafil macrumors 6502

    Joined:
    Sep 15, 2017
  10. Kristine macrumors 6502a

    Joined:
    Feb 21, 2005
    #11
    I can notice it on my Xs Max. I can't notice it on either of the XR that were delivered today.
     

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10 October 25, 2018