How does it work, or how is it supposed to work?
I believe its based on the proximity/light senor. When it reads no light/close proximity for a few seconds, it'll shut off the screen.
My guess and I can be wrong, it works with the light sensor?
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To the right of the ear mic, above the motorola sig, (where the activity light is) that's where the sensor is. So if you have pocket detection on, and the sensor gets covered up (by pocket, hand, or anything else that touches the phone in my opinion) then the phones screen turns off. Its a good idea, but I always
Accidentally cover it up, and it gets annoying.
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I was wondering if anyone else was having this problem. Out of the blue my phone has started going black when making a call rather than waiting for me to put it next to my ear. If I turn it on the proximity sensor still doesn't work, and my face will just start pressing buttons is I don't manager turn the screen off. Any ideas on how to fix this? The phone is stock.
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Are you using some kind of bulky case, or a screen protector that covers the light and proximity sensors (to the right of the earpiece)? If so, that's usually the cause.
If not, you probably have a faulty sensor cluster.
Does anyone else have problems with the screen not turning off when on a phone call? Mine doesn't turn off unless I directly cover the proximity sensor with my fingertip. I believe it has been this way the whole time I've had the phone, but maybe it's been worse since I went to ICS. I'm on Dark Raider right now.
I have been turning off the screen when in a call, but it would be nice if the sensor just worked. Is there any calibration tool available for the vivid? Or is this probably a busted sensor? My fiance's vivid also does the same thing.
I get the opposite. The screen turns off when put on my ear but doesn't come back when taken away from ear. Very annoying when you're dealing with an automated teller. Anybody know know anything?
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Did you find a solution for the proximity sensor? My screen stays one while calling.
ntothes said:
Does anyone else have problems with the screen not turning off when on a phone call? Mine doesn't turn off unless I directly cover the proximity sensor with my fingertip. I believe it has been this way the whole time I've had the phone, but maybe it's been worse since I went to ICS. I'm on Dark Raider right now.
I have been turning off the screen when in a call, but it would be nice if the sensor just worked. Is there any calibration tool available for the vivid? Or is this probably a busted sensor? My fiance's vivid also does the same thing.
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I don't have the required number of posts to insert a link, but I uploaded a clip on you tube so you can clearly see the problem (just type "weird light under glass incredible s" in the search bar)
I had to send my Incredible S in for repair because it stopped charging. That was fixed but then it wouldn't read my SIM card. I sent it back and that was fixed but now I notice this rapidly flashing reddish light (color looks different because of video quality I guess) that appears to be behind the glass near the top of the phone, slightly to the left of the "htc" logo. It is certainly not the LED; is it some other light I don't know about?!? This light come and go; it will stop if I turn the phone off but eventually starts up again. I called HTC and they had no idea and weren't allowed to access YouTube to look at the clip I uploaded. Any suggestions? There are no other problems with the phone but I don't want to ignore this if it's a red flag. If this is indeed a light indicating something, the only thing I can think of is that it is a "tech" light that only a specialist would recognize as meaning some internal part has to be replaced. There's no mention of it in the user manual.
That is the proximity sensor. Check whether you have any apps that is using the proximity sensor. ie. Pocket locker
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That's definitely the proximity sensor!!! U can also see it normally during a call when its dark!!! Does your phone screen turn off when u cover that light??
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as the others have said, that's the proximity sensor. It detects if there is anything near it, like when you put the phone to your ear when talking on it.
In the "talking on the phone case", if it detects something near, it will put the screen into sleep mode so you don't accidentally push buttons with your cheek or similar.
As am84496 said, something is using the sensor and checking for proximity.
Thanks for the responses. You're definitely right. I d/led "proximity sensor finder" and the light came on when the application was started and went off when it was closed. I don't know what application(s) used it before though. Is there any way to find out what application is using the proximity sensor at a given time? Someone suggested to me that it was a sensor and that it might have shorted out. But I guess that isn't likely right? And my screen didn't turn off when I covered it; it would only do that during a call wouldn't it?
jivediscodan said:
(color looks different because of video quality I guess)
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It's infrared
I never noticed it before, but two tiny red dots appeared on each of the bottom corners in the capacitative button area. It looked like some kind of led, but they were very dim. I tested it and it looks like they appear when the micro-usb is partially in. Has anyone else seem them or know what they are?
I noticed them too. I thought they were sensors for the active display so when you reach for the phone it senses your movement and lights up the display. Not sure though, just a guess.
rustynutzz said:
I noticed them too. I thought they were sensors for the active display so when you reach for the phone it senses your movement and lights up the display. Not sure though, just a guess.
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Yeah, your guess is spot on.
I do believe they are infrared sensors (hence why you can slightly see them in the dark as red-colored dots), and they are pulsing constantly to detect any reflection that would indicate an approaching hand.
You are correct, there are actually 3 of them, two on the bottom and one on the upper right corner.
hollovoid said:
You are correct, there are actually 3 of them, two on the bottom and one on the upper right corner.
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I think there's actually 4 of them, one in each corner. And 4 microphones, one in each corner.
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ccheww said:
I think there's actually 4 of them, one in each corner. And 4 microphones, one in each corner.
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Not in each corner actually. The bottom two and upper right. The 4th one is next to the proximity sensor and FFC. I saw it in a video posted on here before. Regarding the sensors that is.
Interesting.
Did not realize that feature was driven by IR sensors.
How do they tell the difference between an approaching hand, and being pressed up against your leg in your pocket?
The software is able to detect whether or not it is in your pocket based off of either the light sensor, IR sensors or possibly a combination of the two.
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Wouldn't the motion sensor come into play in determining if it's your pocket?
I believe "Pocket mode" is determined principally by the "proximity sensor" - the same sensor that determines when the phone is against your cheek during a phone call and turns the screen off. When pocket mode is enabled, the "active display" is disabled, so it doesn't display notifications when it is in your pocket. I believe the pocket mode also disables the ir sensors, so it isn't trying to determine if you are reaching for your phone.
jasoraso said:
I believe "Pocket mode" is determined principally by the "proximity sensor" - the same sensor that determines when the phone is against your cheek during a phone call and turns the screen off. When pocket mode is enabled, the "active display" is disabled, so it doesn't display notifications when it is in your pocket. I believe the pocket mode also disables the ir sensors, so it isn't trying to determine if you are reaching for your phone.
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Correct. Cover the proximity sensor and give it a try. Shake the phone and wave your other hand, it won't turn on.
joshm.1219 said:
Correct. Cover the proximity sensor and give it a try. Shake the phone and wave your other hand, it won't turn on.
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OK, still, what do the 3 red lights do, if you cover the proximity sensor, yes the screen won't turn on. But, the lights still light up and wont activate. They obviously aren't there to activate the screen, so what are they?
I multitask all the time on my Note 9. However when I try to use the screen when I'm talking on the speakerphone (for example, look up a phone number or web browser) the screen turns black immediately when my hand covers the proximity sensor. This is especially an issue since I hold my phone in landscape almost all the time (my left hand covers the proximity sensor). I'm baffled why Samsung would want the proximity sensor to turn off the screen when talking on the speakerphone... with no intuitive way to disable this.
Seems kind of odd considering this phone is meant for busy people who multitask. I've already spent a lot of time looking for a solution for this... but, haven't found a solution yet. I've already tried "Kinscreen" and "Keep screen on" on Google play. However, it doesnt work on the Note 9.
So... what's the trick to disable the proximity sensor on the Note 9?
Saw the below article by searching on Google... However, it seems to be a bogus website with false information:
https://gettechmedia.com/how-to-turn-proximity-sensor-on-off-samsung-galaxy-note-9/
PS: I have a Verizon phone.. so I can't root it either.
Sounds like a screen protector or similar may be causing an issue with the proximity sensor
The screen isn't supposed to turn off when on speakerphone, mine doesn't
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Thanks for the reply. I probably should have mentioned that the proximity sensor works correctly. If I move my finger over the sensor, it blacks out the screen. If my don't cover the sensor, the screen turns on immediately.
I think that's how the proximity sensor is supposed to work by design. This functionality is in place so that when you move your ear to the phone, it turns the screen off.
The problem I have is this that the proximity sensor turns off the screen if I accidentally move my finger over the sensor; even when I'm talking on the speakerphone (when my phone is not near my head). On older versions of android, there's a simple setting to turn this functionality off under Phone/Call Settings.
Could you please check to see what happens if you move your finger over the actual proximity sensor when the speakerphone is on?
harlenm said:
The screen isn't supposed to turn off when on speakerphone, mine doesn't
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mkanet said:
Could you please check to see what happens if you move your finger over the actual proximity sensor when the speakerphone is on?
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I just did, nothing
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Thanks for confirming this! So... my next question is how do I fix this issue. I wonder if there was some setting that I changed that causes this behavior.
PS: If I enable "Smart Stay", the screen will stay on (even if my move my finger over it), as long as I'm staring right at the screen and hold it the phone vertically.
harlenm said:
The screen isn't supposed to turn off when on speakerphone, mine doesn't
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I'm almost too embarranssed to say what the real problem was. I guess I'm more tired than I realized. I just noticed I didn't actually have speakerphone turned on. I guess the phone speaker is so loud that I thought the speakerphone was enabled! Thanks for trying to answer my question anyway.
Lol, glad you sobered up ??
I noticed back in oreo speakerphone screen would go blank after a few seconds.
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Verizon N9. Screen goes black when on speakerphone after 10 seconds.
No screen protector. No proximity sensor issues. This is after I hit the speakerphone button (unlike OP that didnt know speakerphone wasn't truly engaged)
How do you get the screen to stay on when using speakerphone?
Again - this is NOT a prox sensor issue. The prox sensor works great when I am using it against my ear/face and not using speakerphone.
Same issue with the s10+, screen goes off after some time on speakerphone same as note 9.
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