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

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

  1. Vermifuge macrumors 68000


    Mar 7, 2009
    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

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


    Mar 27, 2017
    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

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


    Jan 5, 2016
    Calgary, Alberta, Canada
    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

    Apr 11, 2014
    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


    Jun 13, 2016
    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

    Oct 21, 2008
    Time, because it rules EVERYTHING!
    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

    Sep 15, 2017
  10. Kristine macrumors 6502a

    Feb 21, 2005
    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