ever since iOS 11, I have noticed that if I enable auto brightness, turning on 
the screen curtain will automatically dim the back light to 0%. When I turn off 
the screen curtain, the screen automatically brightens which makes it much 
easier when you have to show your screen to a sighted person, such as when 
using a mobile boarding pass at the airport.

Sent from my iPhone

> On Dec 21, 2019, at 1:05 AM, Sieghard Weitzel <[email protected]> wrote:
> 
> 
> And while you don’t have to see the screen, there is also no advantage in 
> terms of battery saving to have the screen curtain on unless you have an 
> iPhone X, iPhone XS/XS Max or 11 Pro/Pro Max. All of these phones have OLED 
> screens which does not require backlighting hence having the screen black may 
> make a very small difference in battery usage. On any other iPhone it makes 0 
> difference and you are much better off making sure automatic brightness is 
> off and brightness is set to 0%. Of course if you are concerned about privacy 
> and others seeing what you do on your phone the screen curtain is fine.
>  
>  
> From: [email protected] <[email protected]> On Behalf Of 
> Richard Turner
> Sent: Friday, December 20, 2019 11:46 AM
> To: [email protected]
> Subject: Re: question bout screen curton and taking photos
>  
> The Screen Curtain blanks the screen, not the back camera.
> If the Screen Curtain is on when you do a screen shot, you will get a black 
> picture.
> But, it won't change how photos are taken.
> You should do a test to confirm for yourself.
>  
> 
>  
>  
> Richard
> "Reality is the leading cause of stress for those who are in touch with it." 
> -- from The Search for Signs of Intelligent Life in the Universe, by Jane 
> Wagner
>  
> 
> 
> On Dec 20, 2019, at 11:39 AM, Mich Verrier <[email protected]> wrote:
> 
> 
> Hi all. I am just wondering if you have the screen curton on your phone and 
> you take a photo will it take the photo? Or will it just be a black screen? I 
> am planning on takeing some photos when I go home for christmass and stuff 
> and just was wondering about this since I have my screen curton on since I 
> don’t really need to have it off since I am blind and use vo and stuff and 
> don’t need to see the screen. From Mich.
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