Christian Holz of the Hasso Plattner Institute in Potsdam Germany and colleague Patrick Baudisch built the screen to overcome a major drawback with current displays: they emit light but cannot sense it. The researchers created their prototype using a glass screen comprised entirely of millions of 3-mm-long optical fibers bundled together vertically into a single flat platter. Early tests have been encouraging, Holz says, with fingerprint recognition accuracy "up to FBI standards."
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