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The land of the rising sun seems to be at the vanguard of touchable 3D innovation right now, with a number of recent breakthroughs in the field coming from there. Japan’s leading carrier NTT DoCoMo has also been working on its own touchable, glasses-free 3D display for more than two years now. It recently showcased a small touchable 3D display at MWC 2011 in Barcelona.
Those expecting a tactile feast are likely to feel a bit let down, though. Even though it’s pretty cool, the technology is rather crude in the sense that the user needs an unwieldy stylus to interact with 3D content. The force feedback system employed by the display works by sending an electric current to a coil embedded behind the 3D display according to the position of the pen - tracked using two cameras, which has a magnet at its tip to interact with the resulting magnetic field.
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