Red Light Next to Ear Speaker on 3G?

[jcloveralways]

So my phone did not get wet however I did realize that the "sensor" on my phone was lighting up dim red in bed just now and that when it was on my phone was slightly grey on the screen because it was not off all the way.. I felt very uncomfortable and covered the red light and it eventually shut off and when I let go it came back on.. Obviously a sensor but why not be that way all the time.. Why only sometimes and why when my screen is locked and I have no setting other than the unlock button to unlock my screen?.. It's strange.. Glad others feel the same. Btw I have a Nokia Lumia 925

 

[alphaod]

Are saying you have this issue on your Nokia?

Uh... well the red LED is an indicator light? My Lumia 920 broke a while ago, so I have no Windows Phone devices to play with.

 

[Newtons Apple]

The fact that you can see it shine is weird. From the pic it looks almost as if the water is lensing the IR light in some way that lets you now see it. But it seems logical that the water has created another pathway for current, which in turn is affecting the current of the IR LED and causing more light in the red spectrum to shine. Just a guess. BTW, these things work by shining an IR light out, and when it is reflected it is received by the IR phototransistor next to the IR LED, which turns off the screen.

I am betting on the above.

 

[powerstrokin]

Old thread is old.

The pictures that show a reddish light, were taken with a digital camera/phone which can 'see' infrared light. The naked human eye cannot.

Infrared devices typically have a thin red mostly transparent film covering the sensor which can be seen by the human eye when the light hits it just right. There is not visible red light coming from the sensor itself, rather the red film is what's being seen.

To 'see' infrared light- just use your phone's camera pointed at anything that emits IR.. a remote control, etc. Works well in a dark room. Point the remote control at the camera and press a button. You'll see the IR light flashing on your screen.

On a side note- I have a half baked theory about UFO's that involve IR.. they show up on camera sometimes (digital) after a picture is taken and no one actually saw it during the capture with their own eyes.