How does 'tap to wake' works?

Discussion in 'iPhone' started by hank moody, Sep 15, 2017.

  1. hank moody macrumors 6502a

    hank moody

    Jan 18, 2015
    I mean, iphone is always 'listening', waiting for me to tap it? This would drain the battery fast.

    How does it work, technically?
  2. Sir Ruben macrumors 68000

    Sir Ruben

    Jul 3, 2010
    The Apple Watch does it. Doesn't seem to be a big deal. It just works.
  3. itsmemuffins macrumors 68040


    Jun 23, 2010
  4. Nozuka macrumors 68020

    Jul 3, 2012
    it's mostly an AMOLED feature.
    LCD: if you power the screen, you power the digitizer. they are connected.

    with AMOLED you can turn off/on every pixel separately to get true black. but obviously the whole touch screen still needs to work even in places where pixels are turned off and that's why it's powered independently. with this they can keep the touch screen waiting all the time and it barely uses any power.

    at least that's what i read somewhere.
  5. hank moody thread starter macrumors 6502a

    hank moody

    Jan 18, 2015
    thank you for this.
    So, the screen is working, everything is working but the pixels are black, right?

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4 September 15, 2017