The purpose of the screen curtain is to offer privacy and it does this 
perfectly. Apple does not say that turning on the screen curtain saves battery 
and it is not designed to reduce whatever brightness level you set.
As far as I understand it, it just fills the screen with black pixels so that 
nothing else can be seen. Setting the brightness to 0% only means the 
backlighting is all the way off, but it is still perfectly possible for a 
sighted person to see what is on the screen especially if they look directly at 
it in a not too bright place. If it was very bright in the room or outside in 
sunlight and somebody looked a bit from the side chances are at 0% brightness 
very little could be seen.

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of 
William Windels
Sent: Saturday, November 7, 2015 5:09 AM
To: [email protected]
Subject: Re: Screen Curtain:

Hello all,

The screen curtain works perfect for me but the system after this feature could 
better I think.
Sighted friends told me that the iPhone isn’t completely dark when screen 
curtain is on. I mean: they see some light from my iPhone in completely dark 
area’s.

I am not shore but I think that , on this way, the screen is also using energy 
for light while this is useless and could save less energy.
Putting the  brightness of the screen to 0%, when screen curtain is set to on, 
should perhaps be a better way.

Thx for any suggestion or comment about this.

Kind regards,
William Windels
> Op 6 nov. 2015, om 01:22 heeft Donald Moore <[email protected]> het 
> volgende geschreven:
> 
> How do you remove or open it?
> 
> Thanks in advance.
> 
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