Where are the light sensors?

Discussion in 'MacBook Pro' started by MowingDevil, Dec 20, 2008.

  1. MowingDevil macrumors 68000


    Jul 30, 2008
    Vancouver, BC & Sydney, NSW
    I was wondering why my keyboard kept the backlight going no matter how bright the lighting in the room was....checked the prefs and the right setting was checked....then I tilted the screen back a bit more and bingo the backlight turned off on the kybrd. So whats the deal if you want your screen more upright the sensors are blocked? ...or is there a defect there?

    I guess that begs the question as to how far do you tilt your screen back during normal use. On mine if you have it straight up so it forms a 90 degree angle the display washes out a bit. If you tilt it back just a bit everything levels out and is perfect. Too far back and it starts to darken over. Thing is, why would having the screen more upright cause the light sensors not to work? The whole point of getting a proper viewing angle w/ a laptop (according to Apple at the big keynote) is being able to move it to an area of the room that has optimum lighting (so the glossy isn't a problem) and this includes tilting the screen so its the best viewing experience (depending on your changing environment/lighting).
  2. ARK macrumors 6502

    Jul 20, 2008
    Indianapolis, IN
    I believe the sensor is next to he camera in the display. I've noticed the auto brightness change when I sit in front of it versus when I move to the side.
  3. Chundles macrumors G4


    Jul 4, 2005
    It's next to the camera, on the opposite side to the green light that comes on when the iSight is in use.

    On the MacBook Air it's in the same place but it's behind a stack of holes drilled in the aluminium.

    On older MacBook Pros/PowerBooks it's under the speaker grilles.
  4. JG271 macrumors 6502a


    Dec 17, 2007
    Yeah, its to the right of the camera - try covering it!
  5. OmahaGTP macrumors member

    Oct 15, 2008
    If you are already aware of this, ignore me. But if not, check this out. Someone directed me to this when I had a similar concern.

  6. DeusInvictus7 macrumors 68020

    Aug 13, 2008
    Kitchener, Ontario
    It's actually to the left of the camera :D

    The right is the green iSight light.
  7. drewsof07 macrumors 68000


    Oct 30, 2006
    Yeah it's on the left side of your iSight.
    I think this is actually better placement than under speaker grills. I have had much less brightness variation, especially while watching television compared to my old MBP.
  8. MowingDevil thread starter macrumors 68000


    Jul 30, 2008
    Vancouver, BC & Sydney, NSW
    Ok that makes sense. So perhaps the reason the kybrd lights go on when the screen is more upright is due to my (not so bright lighting) is above. When I move the screen more towards a 90 degree angle the lighting goes on because the the light most likely isn't registering w/ the sensor IN the screen. I tilt it back and the lighting goes off. Makes sense. It probably wouldn't happen in a sunlight lit room then; I just didn't expect the angle of the screen to affect how the computer gauges light (thinking the sensors were in the speakers).
  9. mkemp4697 macrumors newbie

    Dec 16, 2012
    RE: Where are the light sensors?

    To add on: F5 and F6 on a macbook pro are keyboard backlight (may need Fn + F5 or F6 depending on settings). F1 and F2 are display backlight keys. If it doesn't adjust how you like it, change it :).
  10. yusukeaoki macrumors 68030


    Mar 22, 2011
    Tokyo, Japan
    Im typing this under a bright desk lamp but the lamp is behind the MBP so my backlit still goes on.
    I just use my F5 keys to lower it down or turn it off.
  11. Ploki macrumors 68020

    Jan 21, 2008

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