Dual mode touch systems
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United States of America Patent
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Sep 25, 2012
Grant Date -
Jun 11, 2009
app pub date -
Oct 31, 2008
filing date -
Apr 29, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An apparatus for detecting a pointer includes a waveguide and a touch surface over the waveguide on which pointer contacts are to be made. At least one reflecting device extends along a first side of the waveguide and touch surface. The reflecting device defines an optical path between the interior of the waveguide and the region of interest above the touch surface. At least one imaging device looks across the touch surface and into the waveguide. The imaging device captures images of the region of interest and within the waveguide including reflections from the reflecting device.
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