| 摘要 |
A system for detecting contact on a display is provided. The system compr ises a planar medium associated with the display and includes at least one e dge facet and opposing surfaces. The system also includes one or more optica l sources operatively coupled to the at least one edge facet for transmittin g an optical signal into the planar medium such that the transmitted optical signal is totally internally reflected between the at least one edge facet and opposing surfaces. An optical sensing device is positioned to substantia lly face at least a portion of the edge facet and adapted to detect at least one object contacting a first surface of the opposing surfaces. The optical sensing device is operative to detect a portion of the optical signal emitt ed from the first surface at a location corresponding to the object contacti ng the first surface.
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