[Q] red light near earpiece - Galaxy S III Q&A, Help & Troubleshooting

Hey I just want to ask what this little red light that turns on when the screen is on, it's the one beside the earpiece on the right side.
This is on my mom's phone so I won't know what this is, hence the question
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Proximity sensor
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nodstuff said:
Proximity sensor
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Is it supposed to light up?
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Doodsz said:
Is it supposed to light up?
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When it's being used..

How come on my Galaxy Nexus and Nexus S they aren't lit up when screen is on
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Because they're different phones.
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Doodsz said:
How come on my Galaxy Nexus and Nexus S they aren't lit up when screen is on
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Touchwiz uses the proximity sensor doesn't it? AOSP roms do not. It doesn't light up on my S3 with an AOSP rom.

Alright thanks for answering my questions. Lol
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Oh okay, thanks
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Mines never lit up, on stock or any custom rom. I'll check again maybe when it comes close to the head it comes on.

sak500 said:
Mines never lit up, on stock or any custom rom. I'll check again maybe when it comes close to the head it comes on.
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I just found out why it lights up
It lights up when you have motion enabled
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Doodsz said:
I just found out why it lights up
It lights up when you have motion enabled
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I have all motion options enabled but still can't see it turn on.
Anyone else has it working?

sak500 said:
I have all motion options enabled but still can't see it turn on.
Anyone else has it working?
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Click to collapse
What's funny is I have the exact opposite situation, I have all motion options disabled but occasionally see it, I can't remember when I see it and under what conditions so I'll post back when I have more useful info. It looks like an infrared light so I'm wondering if it might be able to take commands from another device.
Here are links to 2 other forums speaking about this issue:
http://forum.xda-developers.com/showthread.php?p=28588879#post28588879
http://androidforums.com/samsung-galaxy-s3/577797-red-light-whilst-text-messages.html

Guys the question has already been answered in the 2nd post. Its the proximity sensor and it can light up on different occasions, such as during calls and possibly in text messages etc if you have direct call enabled.
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sxi200 said:
Guys the question has already been answered in the 2nd post. Its the proximity sensor and it can light up on different occasions, such as during calls and possibly in text messages etc if you have direct call enabled.
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We all read it thanks for pointing it out. We are talking about it's lighting up or not lighting up in what conditions.... NOT what it's supposed to do, do read the comments above urs.

He was referring th lordazoroth who believed it to be a infrared emitter/receiver.
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sak500 said:
We all read it thanks for pointing it out. We are talking about it's lighting up or not lighting up in what conditions.... NOT what it's supposed to do, do read the comments above urs.
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Ok. Let me make it a bit clearer for you. When your in a dark environment, dial a number and it will turn on. If direct dial is also on, when you put it near your head, as it starts to dial remove it and you will also see it lit. Nothing more nothing less as far as I know. The reason most people don't notice it is because the light is very feint and on most occassions can't be seen.
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Alright I have more information, I do not have direct calling enabled so when I'm texting the light does not turn on. However when I'm in the middle of a call, I'll see the little red dot light up faintly and the screen will turn off when my head gets close to it. Interestingly enough, there is a cone of detection coming from the light (or directly next to the light). When I move my finger within the cone of detection, projecting from the light, the screen will turn off. When my hand or head is close to the phone without blocking this cone of detection, the phones screen will not shut off. I would assume that due to how dark my testing conditions were (including the screen being nearly pitch black), this would appear to be an infrared detection system. Therefore it should serve any purposes in which proximity detection is needed, including direct calling and automatic screen control. If a program were written, I'm guessing this infrared sensor could be used for any number of things, including remote control and even data transfer.
Interestingly, my Nexus S 4g seems to have a very different detection system, there is no tiny red light nor is there a cone of detection projecting from the front. Instead when anything sizable comes near the top of the device (from the front, top, and/or back) the screen shuts off during a call, which indicates some type of field detection. I'm guessing these two devices have different proximity detection systems either for power conservation, cost of manufacture, or both.

Its proximity sensor. . . Don't worry its not causing any harm. and near to this is RGB sensor.

sxi200 said:
Ok. Let me make it a bit clearer for you. When your in a dark environment, dial a number and it will turn on. If direct dial is also on, when you put it near your head, as it starts to dial remove it and you will also see it lit. Nothing more nothing less as far as I know. The reason most people don't notice it is because the light is very feint and on most occassions can't be seen.
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Click to collapse
Thanks, i was thinking it would be easily visible but it's really faint light and visible under dark conditions only. My guess is it might be infrared light for the sensor. I used to have night vision option in video camera and could see bright light coming out of remote controls dont' know where i placed my old handy cam but if someone has it they can test it out and see if it emits IR light as well.

Related

Red Light "Special"

Okay so during a phone call there's this red light next to the front facing camera, once the call is over it disappears!
Are we bring recorded?!!? Lol
But seriously does anyone know what the red light is and/or why it is there?
Thanks in advance
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Red Light
Stixho said:
Okay so during a phone call there's this red light next to the front facing camera, once the call is over it disappears!
Are we bring recorded?!!? Lol
But seriously does anyone know what the red light is and/or why it is there?
Thanks in advance
Sent from my SAMSUNG-SGH-I777 using XDA App
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Click to collapse
It's not a light at all, it's the proximity sensor.
Lol whats with all the conspiricys on here lately
The proximity sensor doesn't light up. Its the infrared light for the sensor.
Sent from my Galaxy S II (i777)
AT&T is recording all your phone calls and sending the information to companies so that you can get more personalized results. It's part of the terms and conditions that you sign...Now, you can be talking to your friend about these new jeans you really want to buy, end the call, and boom, Amazon's link to that pair is ready and waiting.
@yahoowizard: I knew it!!! LOL
@quarlow: Figured, just wanted to have a fun thread! LOL
Some people have better near-IR sensitivity than others... Just like old people have less sensitivity to high frequencies than young, leading to some old fogeys using "squealers" to implement "get off my lawn!".
The light during calls is the near-IR component of the prox sensor. It's how the phone turns off the screen and disables touch when your face is next to it.
This thread made me laugh.
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@akira: That's one of the main reasons I wrote it!
I knew it. This proveo wasnt crazy I always say a red light on this and the captivate
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Red light near speaker?

Has anyone else noticed a red light near the speaker (the one you put up to your ear) on the left side above the (proximity?) sensor? I have had my rezound just over 2 months and noticed it for the third time today and am courious what it is.
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yep it's like an RF signal..that's the proximity sensor
Yeah it is the proximity sensor. It uses IR... sometimes when it is on full power you can see it is dim lit areas.
Also has the lught sensor in it for auto screen brightness..
Oh ok, makes sense. I was confused because I only got to see it a few times. Thanks guys.
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Nexus torch

Is there any way we will ever get the torch app from cm6 from the incredible I loved that light but when I try to use it its just a normal flashlight I want it bright than my room like the Droid incredible
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I never used that specific one, but have you tried this one? http://forum.xda-developers.com/showthread.php?t=1408341 Seems to work great for me.
This is the app I use, its a nice app, has worked on any device I have put it on, even non rooted devices.
https://play.google.com/store/apps/...1bGwsMSwxLDEsImNvbS5kZXZ1bmkuZmxhc2hsaWdodCJd
jazzyjames said:
This is the app I use, its a nice app, has worked on any device I have put it on, even non rooted devices.
https://play.google.com/store/apps/...1bGwsMSwxLDEsImNvbS5kZXZ1bmkuZmxhc2hsaWdodCJd
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chrisjz said:
I never used that specific one, but have you tried this one? http://forum.xda-developers.com/showthread.php?t=1408341 Seems to work great for me.
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ive used both of them i like them but nothing like the droid incredible flashlight which was schorching bright like twice as bright as these flashlights!
snowman122 said:
ive used both of them i like them but nothing like the droid incredible flashlight which was schorching bright like twice as bright as these flashlights!
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The brightness of the Flash LEDs on the Rezound has nothing to do with the app you use
a.mcdear said:
The brightness of the Flash LEDs on the Rezound has nothing to do with the app you use
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or it can also be the fact that on my incredible i had cm7 and had torch which pushed the leds to their limit and made them really hot but i just loved that flashlight helped out when i needed to look for something in the dark
again, as a.mcdear pointed out - this is a 100% hardware capability thing. while some software might not set the same brightness levels in settings, the limits are the limits of the hardware.
designerfx said:
again, as a.mcdear pointed out - this is a 100% hardware capability thing. while some software might not set the same brightness levels in settings, the limits are the limits of the hardware.
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yes i know but i took out the leds out of my broken rezound i have a second one that i bought retail for not getting insurance never again and connected to a 3.5 volt connector and was significantly brighter so i know it can be forced to be brighter!
snowman122 said:
yes i know but i took out the leds out of my broken rezound i have a second one that i bought retail for not getting insurance never again and connected to a 3.5 volt connector and was significantly brighter so i know it can be forced to be brighter!
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Sure, and you can hook them up to a car battery and they will explode, but that does not mean that another app can miraculously cause the hardware to deliver more power to the Flash LEDs. The fact is that the torch setting on any app is probably already using the maximum brightness that the hardware is capable of.
Snowman is not making things up. The nexus torch on the Incredible would overpower both LEDs at once for a crazy bright light. When I would run non-CM7 ROMs on my Incredible, I always looked for an alternative app that did the same thing, but never could. Most could only run one of the two LEDs. If they could light both at once, they were not overpowered.
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The galaxy torch works for me. Its free on the market.
It's a kernel tweak I believe, find someone who knows how to change it then there you go
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jcaliendo said:
Snowman is not making things up. The nexus torch on the Incredible would overpower both LEDs at once for a crazy bright light. When I would run non-CM7 ROMs on my Incredible, I always looked for an alternative app that did the same thing, but never could. Most could only run one of the two LEDs. If they could light both at once, they were not overpowered.
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Yes thank you that's what I meant to say
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Try something for me then say again that the hardware limits the brightness.
Enter a dark room and turn on any of the available flashlight apps. Then, turn it off and take a picture with flash on. No comparison.
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Kennnny1 said:
Try something for me then say again that the hardware limits the brightness.
Enter a dark room and turn on any of the available flashlight apps. Then, turn it off and take a picture with flash on. No comparison.
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Yes I know all of the apps are the same but that torch one on cm7 is just the best and brightest I think they force the LEDs on the phone to go brighter because they do get hot
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snowman122 said:
Yes I know all of the apps are the same but that torch one on cm7 is just the best and brightest I think they force the LEDs on the phone to go brighter because they do get hot
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Yeah the torch app on the incredible was so bright that every time you turn it on it had a warning popup saying not to leave it on long because it would melt **** lol
No offense, but if having a bright flashlight is really this important to you, why not just get an actual flashlight?
Otherwise, if you're in a pinch and just need a quick light, the rezound is definitely bright enough for illuminating a dark area (like putting your keys in the car door in an unlit parking lot)
I still have my incredible (gf uses it actually) so I know how bright that app is.
What I was saying is that the rezound is clearly capable of the same bright flashlight as the incredible. The incredible one turns on the leds as if to flash while taking a picture but keeps the lights on. I see no reason why the rezound could not do the same. Now do I know how to get that working at the moment - no. But I'm interested enough to do some research and I'll post what I find.
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Kennnny1 said:
I still have my incredible (gf uses it actually) so I know how bright that app is.
What I was saying is that the rezound is clearly capable of the same bright flashlight as the incredible. The incredible one turns on the leds as if to flash while taking a picture but keeps the lights on. I see no reason why the rezound could not do the same. Now do I know how to get that working at the moment - no. But I'm interested enough to do some research and I'll post what I find.
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Refer to my post before, it is the answer y'all are looking for
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who_mike_d said:
Yeah the torch app on the incredible was so bright that every time you turn it on it had a warning popup saying not to leave it on long because it would melt **** lol
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Yes no lie the plastic around the LEDs melted a little but I love it so much I am going to do some research to try to get this on our rezounds because it simply is amazing!!
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[Q] What App Turns off display when covered?

Hi guys, Ive heard about an app that will turn the display of the touchpad off when the display is covered (using official HP folio case). I am using the latest official CM9 nightly, I've tried searching for it but to no avail, any help would be much appreciated.
Many Thanks
Liam
There isn't one, because it would constantly have to be on, and enabled, and scanning, so it would most likely kill your battery more than it would help.
There's a thread about this in the Q&A section asking the very same question, and that's the answer given there. However, if you can find a way to make it work, please feel free.
Actually there is its called smart screen of if I remembered correctly and no it does not take as much battery
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Thanks for that I've just downloaded it and will give it a go and report back.
Many thanks
Liam
I sit corrected. Thank you for that. I'm glad to be proven wrong.
Did anybody get this to work? I've downloaded it and so far hasn't worked .....either that or the proximity sensor on CM9 isn't working
I couldn't get it to work either, I tried to apps both similar in nature but neither would work. Would be good if anyone has any luck getting it to work to post their set up on here so others could try it. I tried it on stock official nightly.
yalkowni said:
Actually there is its called smart screen of if I remembered correctly and no it does not take as much battery
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The app uses a proximity sensor usually located next to the earphone of most cellphones. To my knowledge the touchpad has no proximity sensor so it won't work. Very useful app on any device though.
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You sure it doesn't operate using the camera? I remember one which operated using the camera hence would not work on cm9
spidernix said:
The app uses a proximity sensor usually located next to the earphone of most cellphones. To my knowledge the touchpad has no proximity sensor so it won't work. Very useful app on any device though.
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Click to collapse
the touchpad has a proximity sensor....its in the right corner of the screen the side where the camera is, visible if you hover a led flashlight you'll see a circular red thing glinting.
ace9988 said:
the touchpad has a proximity sensor....its in the right corner of the screen the side where the camera is, visible if you hover a led flashlight you'll see a circular red thing glinting.
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Never noticed that lol.
But don't these apps use front-facing cams?
turdferguson92 said:
Never noticed that lol.
But don't these apps use front-facing cams?
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Click to collapse
hit thanks if that helped
the description for the app says it uses the prox sensor.....my guess is the sensor's drivers aren't on android for the touchpad yet
I don't think it's functional in android. It's not been a major priority. I tried a few apps that leverage the sensor, but to no avail.
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I read this the other day and decided to use one called Case Switch. It uses the light sensor/ proximity sensor to determine if the light is low enough to turn off. Anyway, been using it for several days, love it! I recommend setting your lower min at 48lux. This setting allows for the screen not to turn off under evening low light settings. When I got this on Sunday the 24th there was a free demo and the pro version was $1.00.
Like I say, it works very well and its an excellent addition to or already amazing tabs.
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Kbybee9 said:
I read this the other day and decided to use one called Case Switch. It uses the light sensor/ proximity sensor to determine if the light is low enough to turn off. Anyway, been using it for several days, love it! I recommend setting your lower min at 48lux. This setting allows for the screen not to turn off under evening low light settings. When I got this on Sunday the 24th there was a free demo and the pro version was $1.00.
Like I say, it works very well and its an excellent addition to or already amazing tabs.
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Click to collapse
I don't see any app in the marketplace called "Case Switch."
Edit: I'm assuming you meant Case Sensor? That app works perfectly for the touch pad.
Touchpad has NO proximity sensor, just an ambient light sensor for auto brightness. The small purple dot next to the volume rockers.
cf3esbestia said:
I don't see any app in the marketplace called "Case Switch."
Edit: I'm assuming you meant Case Sensor? That app works perfectly for the touch pad.
Click to expand...
Click to collapse
It is called Caseswitch. It is made by MaxInvention.
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S4 and Valentine One Radar...

I just got my S4 and whenever im in my car and using the phone. My radar goes off. It shows there's a Laser nearby. I tried turning off all the extra stuff on the S4, but it still happens. Had no problem before with my Galaxy Nexus.
Anyone else having this problem??
its definitely one of the sensors tripping the detector maybe?
i have an escort 9500ix and i dont have any problems with it setting it off.
dansan382 said:
its definitely one of the sensors tripping the detector maybe?
i have an escort 9500ix and i dont have any problems with it setting it off.
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Click to collapse
I turned off all the sensors.
thanks
Weird. I too have a Valentine V1 and do not have this problem
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My Valentine has no problems with my S4
Sounds like the inferred blaster is setting off your radar...you can't turn that off....not sure if its always active or not.
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Dang it, i just took a couple of friends in my car to lunch. They have a S4 from Sprint and AT&T. But my radar does not go off when they use their phones.
Try turning off adaptive display. In display. It uses the front facing ira.
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imablackhat said:
Try turning off adaptive display. In display. It uses the front facing ira.
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Click to collapse
How do I do that??
thanks!!
The s4 has two infrared. One on the top of the device next to the mic. And one on the front display. Go to settings display and screen mode.
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imablackhat said:
The s4 has two infrared. One on the top of the device next to the mic. And one on the front display. Go to settings display and screen mode.
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Click to collapse
Ill try it next time im in my car, thanks!!
No problem. Good luck
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Nope it did not fix it.
I think i have turned off every sensor and its still doing it.
To test you phone infa red sensor. You can use any camera and hold it over the sensors. If it's going off you can see the sensor on the camera. You can also test it to see if it's working this way too.
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imablackhat said:
To test you phone infa red sensor. You can use any camera and hold it over the sensors. If it's going off you can see the sensor on the camera. You can also test it to see if it's working this way too.
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Click to collapse
OK ill give it a shot.
Its weird my friends AT&T and Sprint S4 doesn't set it off.
My phone does this too when I hold it at a certain angle lol. I can make it alarm on cue. I'll try turning off adaptive display next time I'm in my car.
I thought my V1 was on the verge of dying.
UrDeadAgain said:
My phone does this too when I hold it at a certain angle lol. I can make it alarm on cue. I'll try turning off adaptive display next time I'm in my car.
I thought my V1 was on the verge of dying.
Click to expand...
Click to collapse
Do you have Verizon S4??
Mine is still doing it, the sensor to the left of the camera is causing it. If i place my finger over it. It stops setting off my V1.
I have turned off every single sensor and it still does it.
CtK4949 said:
Do you have Verizon S4??
Mine is still doing it, the sensor to the left of the camera is causing it. If i place my finger over it. It stops setting off my V1.
I have turned off every single sensor and it still does it.
Click to expand...
Click to collapse
Nope, I have an AT&T s4
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There must be something using that fro facing ir light. Most likely one of the smart features in tw
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Yes try disable smart stay and air gesturing and try again.
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