Hi Dan, Turning screen curtain on does not affect the brightness setting because the way screen curtain works is that it makes the screen black. You can turn brightness all the way down to 0, the will safe you the most battery, but a sighted person can still read the screen, just not so good and in bad light they might not be able to read it at all.
It is a misconception by some people that they think turning screen curtain off is equal to turning the brightness way down and that this saves battery. Brightness refers to the amount of LED backlighting of the screen. The more brightness the more backlighting and the easier it is to see the screen. Turning on the screen curtain will not turn out the brightness hence it will not turn down the amount of LED backlighting hence no battery saving. Think of it this way: you can have a room brightly lit, if you look in from the outside you would see everything. Now imagine turning the lights lower and lower in the room, as you look in from the outside you see less and less, but even with the lights off completely you might see some things in the room if it's light outside and some light comes in through the window. Now picture the same room with the bright lights and heavy black-out curtains drawn. You can see nothing even though the lights in the room are on. This is how screen curtain works, as the name very accurately reflects, it's like a curtain which is drawn across the screen except in this case it's a curtain of black pixels. I wrote to Apple accessibility about this at one point and officially was told that turning screen curtain on has no battery saving affect, those who say otherwise are probably those who would think their headache has gone away because somebody gave them a sugar pill and said it wasa Tylonol *smile*, in other words, it would be a psychological battery saving. Regards, Sieghard -----Original Message----- From: viphone@googlegroups.com [mailto:viphone@googlegroups.com] On Behalf Of Dan Rossi Sent: Wednesday, November 06, 2013 7:36 AM To: viphone Subject: Screen courtain. My apologies for such a newbee question, but I just want to make sure that I fully understand the functionality of screen courtain. I only just realized what might be happening with this feature. I had turned the brightness way down on my screen, and had probably engaged screen courtain at some point. When I was attempting to show my wife some pictures, she said she couldn't see anything, so I turned up the brightness. She still couldn't see anything. She said the screen was black, so I did the three finger triple tap to turn off the screen courtain, and all was happy. So, my question is, should I just leave brightness at a high setting so the screen is easily read by a sighted person when screen courtain is off, and just keep the screen courtain on whenever I am using the phone? I had always assumed that the courtain was dynamic and was only on when the phone was locked. Since it seems to be a persistent thing, then there doesn't seem to be a need for me to keep brightness turned down. Thanks. -- You received this message because you are subscribed to the "VIPhone" Google Group. Post a new message to VIPhone by emailing viphone@googlegroups.com. Search and view the VIPhone archives by visiting http://www.mail-archive.com/viphone@googlegroups.com/. Reach the VIPhone owner and moderators by emailing viphone+ow...@googlegroups.com. Unsubscribe and leave VIPhone by emailing viphone+unsubscr...@googlegroups.com. More VIPhone group options can be found by visiting 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 viphone+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the "VIPhone" Google Group. Post a new message to VIPhone by emailing viphone@googlegroups.com. Search and view the VIPhone archives by visiting http://www.mail-archive.com/viphone@googlegroups.com/. Reach the VIPhone owner and moderators by emailing viphone+ow...@googlegroups.com. Unsubscribe and leave VIPhone by emailing viphone+unsubscr...@googlegroups.com. More VIPhone group options can be found by visiting 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 viphone+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
