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Researchers have developed a clock with a projector, turning the hand into a touch screen

You can control the device by making swipe and pressing the skin.

Scientists from the University of Carnegie Mellon created a watch with a projector that turns the owner’s hand into a touch screen. So they wanted to solve the problem of uncomfortable small screens in “smart” watches. The prototype called LumiWatch projects the interface to an area 5 times larger than the screen size of conventional “smart clocks”.

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