Not sure on devices but for laptops it just sets the pixels to black, so
the backlight is still running. If you want to save battery you need to
use F1 and turn the screen all the way down. All the way down turns the
backlight off. Likewise using F5 to turn the keyboard backlight all the
way down will also shut those lights off.
CB
On 8/15/12 11:18 AM, Teresa Cochran wrote:
Ok, one of my notorious "just wondering" questions.
I've heard many discussions about whether screen curtain saves battery life in
laptops and the smaller devices. I'm wondering if screen curtain works by
modifying information that's already been passed to the display, or whether it
bypasses the display altogether. If it's used on an Ipod, for example, does it
still use a lot of resources? Does anyone know how it works, technically
speaking?
Thanks,
Teresa
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