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Old 07-20-2011, 03:07 PM   #1
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Screen reminiscence?

Hello,

I just got my kobo since yesterday but I was wondering if there's screen reminiscence ? When I closed the Kobo, I was getting the album art, so I thought that removing this option will allow to complete shutdown the Kobo. But no, I got a big black screen saying Powered Off... I wonder if it's gonna leave mark after a while...
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Old 07-20-2011, 03:23 PM   #2
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Quote:
Originally Posted by Mercador View Post
Hello,

I just got my kobo since yesterday but I was wondering if there's screen reminiscence ? When I closed the Kobo, I was getting the album art, so I thought that removing this option will allow to complete shutdown the Kobo. But no, I got a big black screen saying Powered Off... I wonder if it's gonna leave mark after a while...
No, screen burn-in is not possible with the e-ink technology used in the Touch. However, you can get temporary 'ghosting' where a faint image of a previous page can be detected but the 'ghost' will be eliminated after a page refresh.
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Old 07-20-2011, 03:51 PM   #3
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But is a black screen will eat up more battery?
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Old 07-20-2011, 04:04 PM   #4
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But is a black screen will eat up more battery?
No, when the Touch is off it does not use any power. In any event, when the Touch is powered on, the power needed to display an all black or an all white screen is the same.
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Old 07-20-2011, 04:50 PM   #5
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So it's like real ink finally?
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Old 07-20-2011, 07:39 PM   #6
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So it's like real ink finally?
E-Ink has always been real ink power is only used when the page is refreshing.
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Old 07-20-2011, 07:39 PM   #7
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Quote:
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So it's like real ink finally?
Pretty close. Wikipedia has a nice diagram of how it works. The Kobo uses power either to change the ink on the screen (doesn't use power to maintain what's currently on there) or in the background monitoring for touches etc. when you have it turned on and for maintaining the volatile part of the memory (RAM) holding your currently open document/book while on or in sleep mode. When powered off it really takes virtually no power since it's waiting on the switch and it doesn't much (if any) to maintain the "permanent" memory (all your books and the Kobo firmware).
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Old 07-20-2011, 08:11 PM   #8
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Quote:
Originally Posted by joshmosh View Post
E-Ink has always been real ink power is only used when the page is refreshing.
Which is why the only useful metric for battery life is page turns, rather than measuring in dog months or whatever it is they use these days.
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Old 07-20-2011, 11:00 PM   #9
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Which is why the only useful metric for battery life is page turns, rather than measuring in dog months or whatever it is they use these days.
I heard it was cat months...
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Old 07-21-2011, 08:52 AM   #10
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Generally my girlfriend tells me when it's that time of the month, then I plug it in to charge....
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Old 07-21-2011, 10:55 AM   #11
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Good to know then!

Also, I don't put the Kobo in Airplane mode but I don't have any network registered. Is the Kobo is always pinging for a network?
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Old 07-21-2011, 12:01 PM   #12
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It probably is. Airplane mode stops it from doing ANY network/wifi stuff.
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Old 07-21-2011, 02:51 PM   #13
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Ok, so I'll put on it. I hope I won't have the plane icon on my pages however...
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Old 07-22-2011, 09:04 AM   #14
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Quote:
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Ok, so I'll put on it. I hope I won't have the plane icon on my pages however...
As you've probably found out by now, you don't. It'll just appear on system pages and on the top bar in books when you tap for the menu.
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