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167 Posts

11-19-2010

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Tiny red led light ? on Droid Turbo

2014-11-03, 21:50 PM

Does any one know what the tiny red led light is in the very bottom left corner next to the back arrow is ?



To reproduce:



  1. Go to a dark room

  2. Set phone down

  3. Let screen turn off

  4. Slowly and closely look for a red light in the bottom corner

    1. if you get to close or touch the screen then the active display turns on and you will have to  start step 3 again





I assume this is for the Attentive Display feature but I am not sure.

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714 Posts

09-03-2012

United States of America

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Re: Tiny red led light ? on Droid Turbo

2014-11-03, 22:01 PM

I would agree. I'm pretty sure these are the proximity sensors. There is one in each corner.


ThinkPad X1 Yoga 3rd Gen, i7-8650U, Intel 620 UHD Integrated Graphics, 2560x1440 HDR WQHD Display, 16GB LPDDR3 1600 RAM, 1 TB SSD
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5 Posts

11-08-2014

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Re: Tiny red led light ? on Droid Turbo

2014-11-09, 0:00 AM

Yeah, those are infrared LED's. I'm surprised you can see that wavelength! I can only see mine if viewed through a camera. It appears that my Droid Turbo has 3 IR LED's, not 4. There is no light in the top left. Should I have 3 or 4? frown

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714 Posts

09-03-2012

United States of America

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Re: Tiny red led light ? on Droid Turbo

2014-11-09, 4:08 AM

I was mistaken, I believe there are only three like your picture shows. I can see them 'light up' very faintly when they are detecting motion near the device. They are very faint but definitely noticeable. 


ThinkPad X1 Yoga 3rd Gen, i7-8650U, Intel 620 UHD Integrated Graphics, 2560x1440 HDR WQHD Display, 16GB LPDDR3 1600 RAM, 1 TB SSD
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4 Posts

03-26-2014

India

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Re: Tiny red led light ? on Droid Turbo

2014-11-09, 6:24 AM

There is a total of four.  If you go in a dark room like a bathroom and wave your hand in front of the screen you will see the faint red outline of the four Infrared sensors in the corner.   Make sure that you have given a time period to let your eyes adjust. You are probably only seeing three because those are the three activated when you looked at it through the camera.

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5 Posts

11-08-2014

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Re: Tiny red led light ? on Droid Turbo

2014-11-09, 6:38 AM
So after going into a super dark room and giving my eyes time to adjust I was indeed able to see them. But still only 3 like in my picture. Can somebody upload a picture of all 4? I might have a defective unit. :(

EDIT: Ok, so after more research the light that should be in the top-left is actually at the top center. It is a bit to the left of the front camera. This video clearly demonstrates their locations.
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30 Posts

10-28-2013

United States

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Re: Tiny red led light ? on Droid Turbo

2014-11-10, 8:36 AM

WOW...pretty cool....thanks for the post & video....didn't know about those lights....I guess they function in a similar manner as a motion sensor light for your backyard....until this video I thought it worked through the camera which made me leery if the NSA was exploiting that feature to spy on us...although they actually may be anyway...hehehehe....

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1 Posts

01-15-2019

United States of America

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  • Message 8 of 8

Re: Tiny red led light ? on Droid Turbo

2019-01-15, 7:46 AM

My Moto driod z play only has one at the bottom right corner

 

 

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