According to Apple, the background and foreground colours are set to black. Just setting the brightness to 0 would not work. People can still see what is on the display if there is much ambient light.
David Chittenden, MSc, MRCAA Email: [email protected] Mobile: +64 21 2288 288 Sent from my iPhone On 10/04/2013, at 17:01, James Mannion <[email protected]> wrote: > I was under the impression that what it does is set the brightness to > 0. This would be the simplest implementation as well if this is the > case. Setting colors the same would take possibly more programming > considerations. I'm not entirely sure how it works now, but the > brightness to 0 makes sense and that is what I previously heard it > does. > > On 4/9/13, Neal Ewers <[email protected]> wrote: >> Christopher, what you are saying makes sense. The screen must be on in some >> way in order to use gestures. I know a couple people who have developed >> apps. I'll run this by them. That doesn't mean they are experts on screen >> curtain necessarily, but they might know a bit about it. It does no harm to >> ask. >> >> Thanks for your thoughts. >> >> Neal >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On Behalf >> Of Christopher Chaltain >> Sent: Tuesday, April 09, 2013 7:53 PM >> To: [email protected] >> Subject: Re: Screen Curtain a battery saver, but effective? >> >> What you're saying makes sense if the screen is actually turned off when >> the >> screen curtain is on and requires less power than when the screen curtain >> is >> turned off. I've heard though, that the privacy of the screen curtain is >> handled by setting the background and the foreground colors to be the same. >> I don't know how it really works, but if this were the case, you would not >> see any battery savings. This is different then say my laptop running >> Ubuntu >> where I can physically turn the monitor off and no power at all is being >> sent to the monitor. Given that the screen on the iPhone is also a touch >> screen, they obviously can't kill all power to it. >> >> I run the screen curtain for privacy purposes. If it saves me battery power >> then that's great. If people find that running with the screen curtain on >> saves them some battery power then they should use the screen curtain. As I >> said, I haven't noticed a big difference myself, but I go ahead and run >> with >> the screen curtain on anyway. >> >> On 04/09/2013 06:11 PM, Victor Gouveia wrote: >>> While not having done as much extensive research as Neil, grin, my >>> brother, who is sighted, says that the screen curtain effectively >>> shuts off the display, while still making it sensitive to touch, so, >>> the less amount of light being emitted by the cell phone only stands >>> to reason that it would save battery life. >>> Having said that, it's been my experience that my battery drops more >>> quickly when my screen curtain is off doing the exact same thing, as >>> when the screen curtain is on, so I guess in this respect, the >>> research I did was experiential. Smiles. >>> One can even take this a bit further using a laptop as an effective >>> means of understanding the concept. >>> If one puts a laptop side to side with a screen-less note taker, one >>> finds that the note taker uses up it's battery life a great deal >>> longer than the laptop. Even if using a laptop compared to a netbook, >>> especially those utilizing a solid state hard drive, the smaller >>> screen means less in the way of power needed to form the picture on >>> the screen, especially comparing the 17 inch screen laptop to the >>> minute 7 to 11 inch netbook screens. >>> In conclusion, the less power you need to run something, the more >>> battery life you'll save. At least that's been my experience. >>> Victor Gouveia >>> Vice-President >>> Training Coordinator >>> VIP Tech >>> Tel: 1-(888)-737-1115 >>> Fax: 1-(888)-737-1116 >>> [email protected] <mailto:[email protected]> >>> [email protected] <mailto:[email protected]> >>> Limiting Disabilities with Limitless Possibilities >>> >>> -- >>> You received this message because you are subscribed to the "VIPhone" >>> Google Group. >>> To search the VIPhone public archive, visit >>> http://www.mail-archive.com/[email protected]/. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/viphone?hl=en. >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "VIPhone" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >>> >> >> -- >> Christopher (CJ) >> chaltain at Gmail >> >> -- >> You received this message because you are subscribed to the "VIPhone" >> Google >> Group. >> To search the VIPhone public archive, visit >> http://www.mail-archive.com/[email protected]/. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/viphone?hl=en. >> --- >> You received this message because you are subscribed to the Google Groups >> "VIPhone" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> -- >> You received this message because you are subscribed to the "VIPhone" Google >> Group. >> To search the VIPhone public archive, visit >> http://www.mail-archive.com/[email protected]/. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/viphone?hl=en. >> --- >> You received this message because you are subscribed to the Google Groups >> "VIPhone" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > -- > You received this message because you are subscribed to the "VIPhone" Google > Group. > To search the VIPhone public archive, visit > http://www.mail-archive.com/[email protected]/. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/viphone?hl=en. > --- > You received this message because you are subscribed to the Google Groups > "VIPhone" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > > -- You received this message because you are subscribed to the "VIPhone" Google Group. 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