How does my iPhone sense when I'm holding it to my ear?

Discussion in 'iPhone' started by mrsir2009, Feb 5, 2012.

  1. mrsir2009 macrumors 604

    mrsir2009

    Joined:
    Sep 17, 2009
    Location:
    Melbourne, Australia
    #1
    Hey guys... You know how when your calling someone on your iPhone, how the screen goes black when you hold it to your ear, then the screen comes back on when you take it away from your ear. How does it sense that? The phone doesn't even have to touch your cheek... I'm guessing either the front camera or the ambient light sensor?
     
  2. Jordan921 macrumors 68040

    Jordan921

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    Jul 7, 2010
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    Bay Area
    #2
    Umm really?! Haven't heard of the proximity sensor right above the ear piece?
     
  3. TM WAZZA macrumors 68000

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    Hamilton, New Zealand
  4. mrsir2009 thread starter macrumors 604

    mrsir2009

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    Sep 17, 2009
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    Melbourne, Australia
  5. Comeagain? macrumors 68020

    Comeagain?

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    #5
    It's under the front piece of glass. Its not invisible, but you can't really see it...and it can see you...
     
  6. bandofbrothers macrumors 601

    bandofbrothers

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  7. maril1111 macrumors 68000

    maril1111

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    #7
    Firstly the proximity sensor is what senses when it gets closer to your ear and its located right here:

    111994-iphonesensors.jpg
     
  8. mrsir2009 thread starter macrumors 604

    mrsir2009

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    #8
    Oh, so its two sensors... Thanks you! :)
     
  9. TM WAZZA macrumors 68000

    Joined:
    Sep 18, 2010
    Location:
    Hamilton, New Zealand
    #9
    Ever seen a white iPhone 4/S?

    [​IMG]

    Hard to see on a black iPhone but you can under extreme lighting and at a certain angle.
     
  10. Maverick713 macrumors 6502

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    Jun 14, 2009
    Location:
    Houston, TX
    #10
    omg they have things like that??????

    ----------

    how is it your rating is demi god?
     
  11. stridemat Moderator

    stridemat

    Staff Member

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    #11
    It just means we have contributed.
     
  12. iHateMacs macrumors 6502a

    iHateMacs

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    #12
    If you ever take a video of your iphone when it's on a call, (depending on the camera you use) you can see the infra red light being emitted by the proximity sensor.

    This is why "Raise to speak" on Siri flattens your battery because the IR is being emitted all the time when the phone is awake.
     
  13. Rocko1 macrumors 68020

    Rocko1

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  14. wordoflife macrumors 604

    wordoflife

    Joined:
    Jul 6, 2009
    #14
    Well that's how it was on the old iPhone. The new ones are like below. The black strip are the sensors.

    You can see it on the black iPhone in direct sunlight.
    [​IMG]
     
  15. mrsir2009 thread starter macrumors 604

    mrsir2009

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    Location:
    Melbourne, Australia
    #15
    Thank you guys :) I'm pretty new to iDevices haha...
     

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