Abstract
Generally, 3-D interactive systems are used in systems with large displays and are not
suitable for portable devices. To “touch” a floating 3-D image displayed from a mobile device, we
proposed a camera-free, 3D, interactive, virtual-touch system for bare fingers. By embedding
optical sensors into the display pixels and adding angular scanning illuminators to the edge of
the display, a flat panel can sense the images reflected off a bare finger. The three-axis (x, y,
z) information of the fingertip can be determined by analyzing these reflected images. The
proposed 3-D virtual-touch system successfully functions with a 4-in mobile display.
© 2013 IEEE
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