Kevin, That is why you have to have screen brightness set to auto.
The screen curtain by itself does exactly what you said.
But, if you have auto brightness on; after a very short time, check the screen 
brightness with the screen curtain on and it will be zero and you will notice a 
difference in battery usage.





Richard
“What we think or what we know or what we believe is in the end of little 
consequence. The only thing of consequence is what we do” ~ John Ruskin
My web site: https://www.turner42.com


> On Aug 28, 2022, at 12:35 PM, Kevin Minor <[email protected]> wrote:
> 
> 
> Hi.
>  
> Evidently, screen curtain works differently now. When I learned how it 
> worked, what I read was it didn’t effect the screen brightness. All it did 
> was to have all the pixels show black, rather than turn them off.
>  
> I don’t know what’s done with it.
>  
> Kevin, Valerie and Jilly
>  
> From: [email protected] <[email protected]> On Behalf Of 
> Richard Turner
> Sent: Sunday, August 28, 2022 3:29 PM
> To: [email protected]
> Subject: RE: iPhone question.
>  
> Screen brightness only impacts what someone sees on your physical phone, it 
> doesn’t have any impact on anything you send.
>  
> I know Apple and others do not agree with me, but I simply set screen 
> brightness to auto, turn on the screen curtain, which means the brightness 
> will be at 0 very shortly.
> Then, if someone sighted needs to see my phone, I either toggle the screen 
> curtain off, or toggle VoiceOver off and the screen brightness adjusts to the 
> room lighting so they can see it fine.
> I do this all the time with my wife so she can see my screen when needed.
>  
> And, charging once a day is normal.  I have the 13 Pro and get a full day’s 
> use on a charge and I use it a lot.
>  
> IF I forget to turn on the screen curtain, I notice a definite drop in 
> battery life.
>  
> Logic says, if the screen brightness takes more juice, doing what I do uses 
> less juice, the same as manually lower the screen brightness.
>  
>  
>  
>  
> Richard
> “People demand freedom of speech as a compensation for the freedom of thought 
> which they seldom use.” - Søren Kierkegaard
>  
> My web site: https://www.turner42.com
> 🦅
>  
> From: [email protected] <[email protected]> On Behalf Of Jenny 
> Bomareto
> Sent: Sunday, August 28, 2022 9:45 AM
> To: [email protected]
> Subject: iPhone question.
>  
> Hello,
>  
> I’ve been having to charge the battery quite a bit on my phone usually every 
> day but then I’m usually playing with it all day long so that’s my maybe 
> another reason. Anyways. I currently have the screen brightness set to zero 
> however it was set at 33% also currently it’s set to dark so how should that 
> be set?  Also if I send a text or an email with like say an attachment that a 
> visual person has to read while they be able to read it with my phone screen 
> set at 0% and if you guys think I should still leave dark turned on? And how 
> about a text message as well with pictures or text?
>  
> Thanks for reading regarding this matter.
> Jenny Bomareto
> 
> Sent from my iPhone
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