TechFest: Back of Device Touch Input

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This demo explores how to add pointing input capabilities to very small screen devices. On first sight, touch-screens seem to allow for particular compactness, because they integrate input and screen into the same physical space. The opposite is true, however, because the users fingers occlude contents and prevent precision. Microsoft Research Redmond has created a 2.4 inch prototype that allows a back-of-device interface. This clip explains how and why it works.



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