Currently Being ModeratedMay 24, 2011 9:43 PM (in response to Joey!! 【ツ】)
Can someone provide information about this? Does your GSM iPhone 4 perform the same way?
Currently Being ModeratedJun 7, 2011 11:03 PM (in response to Joey!! 【ツ】)
That's how mine works, too. I'm pretty sure that's "working as intended" but I do agree it would be better if the screen would dim while active if moved from a brighter to less bright environment.
Currently Being ModeratedJun 14, 2011 7:55 PM (in response to John Hammer1)
Thank you for your comments John.
Can anyone else confirm that this is how it is designed to work or have any other comments?
Currently Being ModeratedJul 14, 2011 6:37 PM (in response to Joey!! 【ツ】)
That is actually very interesting that they decided to make it work this way. I just got a new iMac and its ambient light sensor immediately brightens and also dims the screen brightness when the amount of light in the room changes.
I wonder if it still performs this way in iOS 5 beta...
Currently Being ModeratedJul 14, 2011 10:57 PM (in response to Joey!! 【ツ】)
1) Adjust the brightness to any level ( with Autobrightness ON ).
2) Take it to any light environment ( bright or dim )
3) Off the autobrightness ( brightness level should be same ) ) . As soon as u off it, u will c the changes in the brightness.
Thats the way i checked whether its woking or not.
Currently Being ModeratedJul 18, 2011 5:26 PM (in response to Joey!! 【ツ】)
I have the same problem with my iPhone 4; however, I'm sure that this is not the way it is supposed to work. My brother has an iPod touch 4g and the auto-brightness feature works just fine on it, it both brightens and dims automatically without putting the device to sleep, and I notice the change in brightness while walking from a bright place to a dark place and the otherway around. So if it is working this way on iPod touch 4g, why not on iPhone 4????
Currently Being ModeratedJul 18, 2011 5:39 PM (in response to sachit)
That's right, it really shows that the auto brightness is working and you really notice the change, but it doesn't prove that the feature is working properly since the device doesn't dim when you go to a dark ambient.The change that you notice is because the brightness that you manually set is higher than what you needed in the bright ambient, so when you turn the auto brightness off the brightness goes to the manually set state, and when you turn it on it goes to the state that it's supposed to be in the bright place not the state that it should be on the dark place. The brightness that you need in the dark ambient is the brightness that you get when you wake your device from sleep in a dark ambient, and you will never get that same brightness when you move from a bright ambient to a dark ambient, and that's the problem.
Currently Being ModeratedSep 8, 2011 6:22 AM (in response to Joey!! 【ツ】)
Hi guys, my ambient sensor is not working at all. Go from light to dark rooms and vice versa and no change, auto brightness ON or OFF still no plan. Surely this has got to be a BUG.
Currently Being ModeratedNov 14, 2011 5:04 PM (in response to John Hammer1)
The iPhone 4 behaves the same way in iOS 5.
Anyone have more details? Like how it works on other devices? iPad?
Currently Being ModeratedDec 1, 2012 4:17 AM (in response to Joey!! 【ツ】)
Your iPhone's ambient light sensor is functioning normaly.
Found this in another forum...
Camouflaged behind the black glass where you can't see them except with a bright flashlight are two more sensors: a proximity sensor that shuts off the screen illumination and touch sensitivity when the phone is against your head (it works only in the Phone application), and an ambient-light sensor that brightens the display when you're in sunlight and dims it in darker places.
Apple says that it experimented with having the light sensor active all the time, but it was weird to have the screen get brighter and darker all the time. So the sensor now samples the ambient light, and adjusts the brightness; it does this only once--each time you unlock the phone after waking it.
You can use that tip to your advantage. By covering up the sensor (just above the earpiece) as you unlock the phone, you force it to a low-power, dim screen-brightness setting (because the phone believes that it's in a dark room). Or by holding it up to a light as you wake it, you get full brightness. In both cases, you've saved all the taps and navigation it would have taken you to find the manual brightness slider in Settings.
Currently Being ModeratedAug 22, 2013 10:48 AM (in response to Joey!! 【ツ】)
Guys if you have too this problem with your iphone light sensor that its light is not getting dim in low light situations then follow these steps:
1) Calibirate your light sensor.
or 2) Reset your device.
or 3) Restore your device iOS with the help of itunes but this will delete your all data including purcased apps.
If all these don't work for you take your device to apple's service centre.
And guys I want to tell you one very important thing that if your light sensor is not responding to low light situations that means your light sensor is malfunctioning it should respond automatically to both the light situation bright and dark with "auto brightness on" And I found this by chating with the technical advisor of apple support service.
Currently Being ModeratedAug 23, 2013 10:20 AM (in response to ShubSharma)
The behavior I explained in post 1 is not a hardware issue. Yes, if your phone never auto adjusts the brightness to a dim level after sliding to unlock in a dark room and you have the setting enabled, it's a hardware issue.
An update on my original post: I bought an iPhone 5 and it's the exact same behavior - it does not dim back down once brightness has increased. You have to sleep it and wake before it'll adjust to the new lighting. I do believe it'd be better if it did, but this is the way Apple intended it to work. It has been that way since iOS 4 through iOS 7 (so I hear).
I have filed an enhancement request at bugreport.apple.com.