Does auto-brightness work differently on iPhone 5?

It works the same from what I can see.

What I noticed the other day (which is how I would expect auto brightness to work). I was setting my iPhone 5 up. I was sitting with the sun shining through the windows (which was directly behind me). I had set the brightness level to around 75 percent, I had auto brightness on. When I went back into the brightness section again, due to the bright sunlight, I saw the brightness level move its self up to the maximum level. It done this because of the bright sunlight and so that it would be easier to read. This is exactly how I would expect auto brightness level to work, i.e dim itself when in a darkened room, and brighten up when in a well lit area.

If you go into the section to alter the brightness, and set it at say 75 percent, put auto brightness on. Leave the screen on for the brightness section and go outside in the sunlight. You should see fairly quickly the brightness level go up all by its self. I forgot to mention that both my iPhone 5 and iPad 3 do this.

iOS 6 changed how the brightness functions on all my devices, iPhone 4, 4S, iPad. I don't have the 5 ( yet ), but I assume it;s the same. No matter what the brightness level had been set at when I locked the screen, when I first wake it up it is very dim then slowly adjusts it self to the necessary level based on ambient light. If ypou're in the brightness setting you can watch the slider move itself to the proper level.

This is quite different from previous phones/operating systems where the screen would come on at previous brightness level and then adjust itself to the ambient light. I remember how it would always blind me if I woke it up in a darkened room!

mine doesnt work after the update I cover then whole sensor or phone under heavy blankets it does nothing

That does work for me though that brightness lift from dim to normal!

There is nothing wrong with the auto brightness.

When you have auto brightness enabled the slider works as the minimum brightness setting with auto brightness.

If you have the slider too high the brightness cant reduce because youre not letting it.

Set your brightness at about 25% and you'll see what I mean.

Refer to Figure 1 in http://www.displaymate.com/AutoBrightness_Controls_2.htm

Prior to iOS 6, the control function of Auto Brightness is pre-determined based on the Brightness slider value you set. Figure 1 shows 4 such curves; 1/4, 1/2, 3/4 and Max.

In iOS 6, http://www.reddit.com/r/apple/comments/10a9p0/til_how_the_ios_6_auto_brightness_ works/ propose that users can dictate their own brightness function.

1. In ambient brightness of value a1, if you're not happy with the proposed brightness by the phone, you set it to some brightness level, say b1.
2. In ambient brightness of value a2, if you're not happy with the proposed brightness by the phone, you set it to some brightness level, say b2.
3. In ambient brightness of value a3, if you're not happy with the proposed brightness by the phone, you set it to some brightness level, say b3.

From now on, each time the phone goes into ambient lighting of level a2, it will automatically go into brightness level b2.

Sensor works very well, both on 4S and 5 but people do not know how to set it correct.

1. You need to set slider on minimum brightness

2. Turn auto-brightness one ON/OFF and set it on ON, than it will adjust automaticly

"Auto-Brightness:

The auto-dim feature got significantly improved in iOS 6. The best improvement is brightness adjustment in the lock screen. Before, in a dark room, I would be blasted with the iPad or iPhone’s default brightness before sliding to unlock and having it dim down to match the room’s brightness. Now, from the moment the screen turns on, the brightness is appropriate.

In all previous versions of iOS, the light sensor would sense the room’s brightness and then suddenly make the brightness adjustment. In iOS 6, the auto-brightness adjustment is gradual and much more subtle, like the Mac. "

The auto brightness is an ios 6 bug , just seen cnets apple byte where they state the auto brightness does not work and they gave the whole ios 6 a bad apple , not a good start sadly

If you download the cnet tv app from the appstore you can watch the weekly podcast

Iclick on shows and choose apple byte

The story over ios 6 and iphone 5 and iphone 4s problems is

Apple Byte:

iPhone 5: Record sales, record frowns?

Dated 27/09/2012

There are plenty of other older videos to watch as well

Its a good and sometimes funny weekly show

Hope that helps

I can confirm auto brightness does work. Not the way you think it should but it does. Set the brightness to about 25% in a dark room (bathroom with lights off the best) and auto brightness on. Now turn your display off keeping the phone on the brightness screen so when you unlock the phone your back at brightness setting. Turn the lights on and unlock your phone, you will see the brightness bar go up a lot from what it was.

I would say there is a slight issue with it not gradually dimming and brightening on its own with the display still on. But I find myself in rare situations where I go from DARK to LIGHT. Normal living does not always have drastic light changes in my opinion, but still that slight slight change in light can make a difference