Proximity and light sensor - Desire HD Q&A, Help & Troubleshooting

I always thought that both sensors were incorporated in the sensor to the right of the speaker grille, but one day I got another camera phone and had a look at the speaker/sensor combination while my DHD was making a call. There seemed to be some IR light coming from behind the grille itself. Is the proximity sensor really placed behind the grille?

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I can see the hole for the front-facing camera in my TMOUSA TP2

Is everyone 100% sure that the TMO TP2 doesn't secretly have a front-facing camera? (just like how the HD2 secretly had extra RAM)
I can see the hole, exactly where it is supposed to be in the international version. I'm wondering if there is a camera behind it.. or just a hole...
I just realized that the hole was there after looking very very closely. Its to the right of the speaker that you hold your ear up to.
Just some food for thought
EDIT:
-Oh and its not the proximity sensor, that's on the left side of the front speaker
-And I put my phone on auto-adjust backlight and when I put my finger over it, the backlight doesn't change so I doubt that it is the light-sensor either
i know what ur ralking about i thought that it was for more sound, like a bass or something
aestivalisakito said:
i know what ur ralking about i thought that it was for more sound, like a bass or something
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ME TOO! lol
Make a phone call and then cover that hole with your finger and see if the screen turns off. My guess is it's the proximity sensor.
dwizzy130
the proximity sensor on the tilt 2 and similar touch pro 2's is above the c in htc. if you tilt the light just right you can see it. the european touch pro 2 has the camera where my carrier logo is. im not sure what that is on the tmobile version but i dont think its the camera. or even the proximity sensor.
The front-facing camera on my UK TP2 is a lot further away from the centre of the phone than that.
That is not a camera. That's the light sensor used to auto-adjust the screen brightness.
dwizzy130 said:
Make a phone call and then cover that hole with your finger and see if the screen turns off. My guess is it's the proximity sensor.
dwizzy130
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Nope, its definitely not the proximity sensor... that's on the left of the front speaker.
cinguliano said:
That is not a camera. That's the light sensor used to auto-adjust the screen brightness.
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When I adjust the lighting for only the spot where I think the camera is, my phone does not adjust its backlight...
So you could still be right, but right now I doubt its the light-sensor
skyler17 said:
When I adjust the lighting for only the spot where I think the camera is, my phone does not adjust its backlight...
So you could still be right, but right now I doubt its the light-sensor
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Actually it does...try this: hold your thumb over that spot for about 5 seconds, then pull it away...within 2 seconds the screen will probably dim. I just did this test at my desk, under normal flourescent office lights, and that's what happened. I repeated it 3 times with the same results.
sirphunkee said:
Actually it does...try this: hold your thumb over that spot for about 5 seconds, then pull it away...within 2 seconds the screen will probably dim. I just did this test at my desk, under normal flourescent office lights, and that's what happened. I repeated it 3 times with the same results.
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We have a winner!
WHO DAT!
Geaux Saints!
Pendarus said:
We have a winner!
WHO DAT!
Geaux Saints!
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DREW DAT! lol and Sean, and Reggie, and Marques, and Scott, and Jeremy, etc etc
no thats not the light sensor. the light sensor is the speaker grill on the right. it looks like a notification led that never lights up. still not sure what that circle is but i have a feeling its nothing.

red light when in a call (weird)

there is a weird (faint) red light when I'm in a call, anyone know what this is??
(when I take a picture of it using my sensation camera it looks very bright but in real life it is faint like you wouldnt notice it until you look closer)
its there whether screen is on or off, and and if i put my hand over it it just stays lit
is it infrared or something to detect when my ear is near the screen??
My understanding is that is the sensor that tell the phone if your head is next to it or not.
As above, its the proximity sensor for turning the screen off when your face is near the phone.
There are loads of threads on Crackberry about it as their sensor flashes quite noticeably.
Steve

[Q] Red light

Hi,
I noticed that in the upper left corner, near the proximity sensor when I am on a call there is always a red light flashing. So I thought that maybe that is from the proximity sensor alone, but then I remembered as this is not my first device with a proximity sensor that I have never noticed something like this. I also used HTC Desire and never noticed red light near the proximity sensor. I would like to ask you if you all have it also or maybe it's just on my phone.
Thanks
Good question, I am thinking about this from the beginning

Proximity Sensor damage from prolonged use?

Hi Guys,
Just wondering what your thoughts and experiences are on this:
If I use the Quick Glance Motion mode in the N2... I believe constantly keeps the proximity sensor fired up.
Can this continuous and prolonged use damage the Proximity sensor? I bought my phone outright from CL... so I am not quite covered for replacement with Sprint if that happens, so I wanna be safe than sorry... thanks!
Well, I've not heard of this happening, however there are two parts to the sensor.
There is an IR emitter which is a simple IR LED like you'd find in the front of a remote control. You can verify this is working by looking at the face of your Note 2 with another CMOS based camera such as those on another cell phone. The 1st hole to the right of the speaker at the top of the phone is the IR emitter. You may be able to see a faint red glow from it as well when it's active.
The other sensor isn't as easy to test, the IR receiver which is the 2nd hole to the right of the speaker. One option is to use the built in test mode by going to your dialpad and entering *#7353#
After that its option 11 I believe for the prox sensor test. It's fairly simple to use.
In the end, proximity is a very simple IR light and receiver. nothing fancy to it. It's not out of the realm of possibility, but out of the things that could break on the phone those would be my last guesses.
Good luck!
aramova said:
Well, I've not heard of this happening, however there are two parts to the sensor.
There is an IR emitter which is a simple IR LED like you'd find in the front of a remote control. You can verify this is working by looking at the face of your Note 2 with another CMOS based camera such as those on another cell phone. The 1st hole to the right of the speaker at the top of the phone is the IR emitter. You may be able to see a faint red glow from it as well when it's active.
The other sensor isn't as easy to test, the IR receiver which is the 2nd hole to the right of the speaker. One option is to use the built in test mode by going to your dialpad and entering *#7353#
After that its option 11 I believe for the prox sensor test. It's fairly simple to use.
In the end, proximity is a very simple IR light and receiver. nothing fancy to it. It's not out of the realm of possibility, but out of the things that could break on the phone those would be my last guesses.
Good luck!
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Thank you aramova, for walking me through this stuff. I have to admit, I have never hear of this sensor going bad due to continuous and prolonged use, but something about the sensor staying red/orange in color, all the time made me think... something could go bad here... guess not, since no one reported this ever...
If anyone else has something different to report here, please share guys... Thank you!
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Easy FIX!!!!!
I took a can of compressed air and blew it through the top earpiece grill a few times and Voila, it works great now!!
I actually used a Old perfume can which perfume was over and it was only pressing Gas OFF!!

Camera dual-led flash

Hi all. There are 2 LEDs, but when flashlight is on, only one (on the top) is active. I thought the second one can be activated when camera is used, but no, it does not help. Any ideas on how and when it should be active? Can someone check this on your device so that I can know whether it is a hardware issue with my phone? Thanks in advance!
It seems that's a kind of light sensor, or infrared led - because it even doesn't shine when I apply external 365nm UV light source.
It's the second light sensor which measures light coming from the back side of the phone. When you shine a strong light directly on this sensor, screen brightness bumps up after a while. It doesn't happen if you cover the sensor by finger. The purpose is to have screen readable when you're holding the phone against bright background (window, TV screen...) and in my experience it's quite a nice feature.

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