System and method of detecting contact on a display
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United States of America Patent
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-
Jan 10, 2012
Grant Date -
Jan 29, 2009
app pub date -
Jul 23, 2007
filing date -
Jul 23, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A system for detecting contact on a display is provided. The system comprises a planar medium associated with the display and includes at least one edge facet and opposing surfaces. The system also includes one or more optical sources operatively coupled to the at least one edge facet for transmitting 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 substantially 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 emitted from the first surface at a location corresponding to the object contacting the first surface.
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