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Apple Patents Battery-Saving Multi-Touch Displays That Don't Need To Be Active To Work - techcrunch.com
Apple was granted a patent Tuesday by the USPTO (via AppleInsider) that describes a system for implementing multi-touch in a mobile device even when there the display itself isn’t actively showing any images. It’s a neat trick, and one that could help portable gadgets save battery life by not invoking the most battery-hungry element in their construction nearly as frequently.
The patent also notes that the screen doesn’t have to be off for these no-look commands to work; a user could do things like swipe a finger in circle to change volume or tracks, for instance, even while a display is active. That adds new control
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