Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2004-04-29
2008-12-02
Tran, My-Chau T (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S175000, C345S176000, C345S179000, C178S018030, C178S018090, C178S018110, C178S019010, C178S019050
Reexamination Certificate
active
07460110
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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Boone David Kenneth
Sirotich Roberto A. L.
Ung Chi-Man Charles
Katten Muchin & Rosenman LLP
Smart Technologies ULC
Tran My-Chau T
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