Just go to Accessibility Settings > Display Accommodations and make sure auto 
brightness is on.
It seems that now if it is on and you turn screen curtain on brightness is set 
to 0% and if you turn screen curtain off the auto brightness kicks in and 
adjusts it to an appropriate level.

From: 'Sandy Tomkins' via VIPhone [mailto:viphone@googlegroups.com]
Sent: Tuesday, January 23, 2018 2:28 AM
To: viphone@googlegroups.com
Subject: Re: Does having screen curtain on save battery power?

hi,
Okay, now I am getting confused… I would much rather have my screen brightness 
set to some kind of normal level, while having it turned down to 0 when I use 
the screen curtain. I often have to pass my phone to show someone something or 
to  let them use it, and it is always a pain going into control centre and 
flicking up on the brightness et cetera. how much easier to just do three 
finger triple tap? however, I am possessive of my battery life. so, could 
someone give me the definitive steps for making screen curtain automatically 
set brightness to 0? and when I turn screen curtain off, have the display set 
to some preset or automatic level?

thanks, Sandy

Sent from The dark side of the moon

On 22 Jan 2018, at 20:06, Sieghard Weitzel 
<siegh...@live.ca<mailto:siegh...@live.ca>> wrote:
Ed,

Turning auto brightness on and off was moved into Accessibility Settings 
although I don’t for the life of me know why Apple did this, according to my 
logic it is much more appropriate under Display and Brightness in the main 
Settings where it used to be.
Anyhow, open Accessibility Settings, you are looking for “Display 
Accommodations”, it’s the fourth item from the top after Voiceover, Zoom and 
Magnifier.

As for brightness dropping to 0% when auto brightness is enabled and screen 
curtain is on this does seem to be the case although when I first tried this it 
didn’t seem to be so. When I first toggled screen curtain on and checked it 
still read the same value as before, but once I locked my phone and then 
unlocked it it was reading as 0% so it seems that if you turn on screen curtain 
the phone first has to lock and then as long as you keep screen curtain on when 
you unlock it the screen brightness is indeed at 0%.

Regards,
Sieghard
turn auto brightness off and then manually set your brightness to 0% or 5% if 
you want just a bit of backlighting.

Also, just as a little tip which I think many of us forget, when you can’t find 
a particular setting but pretty much know a word from it’s title, just try the 
search field at the top of the main settings screen.
If you type either “auto” or “brightness” or even “bright” the setting for 
adjusting auto brightness shows up in the list of matches. It even reads the 
settings group where you find that setting.
Now, here is an interesting item: Auto Brightness exists twice, once in General 
> Accessibility > Magnifier and also General > Accessibility > Display 
Accommodation. If you tap on the item in the search results it does take you to 
the Accessibility Settings, but interestingly enough not straight into Display 
Accommodations.
When I checked Magnifier the setting for Auto Brightness there was turned off 
on my phone although it’s turned on in Display Accommodations. I assume maybe 
Apple moved it to Accessibility since you can control it separately for when 
you use the phone normally and when you turn on magnifier?

Regards,
Sieghard

From: viphone@googlegroups.com<mailto:viphone@googlegroups.com> 
[mailto:viphone@googlegroups.com] On Behalf Of Mr. Ed
Sent: Monday, January 22, 2018 10:53 AM
To: viphone@googlegroups.com<mailto:viphone@googlegroups.com>
Subject: RE: Does having screen curtain on save battery power?

Hi Feliciano,
I could not find the auto brightness in IOS 11. Could you please tell me where 
it  is located.
Also how do you know what you said in your email below is correct?
Mr. Ed
From: viphone@googlegroups.com<mailto:viphone@googlegroups.com> 
[mailto:viphone@googlegroups.com] On Behalf Of Feliciano Godoy
Sent: Sunday, January 21, 2018 11:10 PM
To: viphone@googlegroups.com<mailto:viphone@googlegroups.com>
Subject: Re: Does having screen curtain on save battery power?

Hi,
with iOS 11, if screen curtain and auto brightness is enabled. Brightness goes 
to 0%. With that said, you will conserve battery power.

Regards,
Feliciano
For tech tips and updates, LIKE 
www.facebook.com/theblindman12v<http://www.facebook.com/theblindman12v>
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On Jan 21, 2018, at 7:46 PM, Kelly Pierce 
<kellyt...@gmail.com<mailto:kellyt...@gmail.com>> wrote:
It is correct. this is because on LCD screens, the same amount of
energy is used to project black on the screen as white or other
colors. The display elements are not turned off but just turned to
black. On OLED screens such as with the iPhone X, a black screen
turnes off the diodes.

Kelly

On 1/21/18, Mr. Ed <pink...@abe.midco.net<mailto:pink...@abe.midco.net>> wrote:
Hi All,

I know this has been discuss way back when. To my recollection I remember
it
being said that having the screen curtain turned on does not save battery
power. Can anyone share any information on this as to whether this is
correct or not.

Mr. Ed

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