Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2008-01-29
2008-01-29
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S173000
Reexamination Certificate
active
07324095
ABSTRACT:
Provided is a pressure sensitive input device for data processing systems. In a particular embodiment, the device includes a transferable overlay for placement over a display screen of the system. Rows and columns of parallel conductors, which may be manufactured as ridges, are positioned to cross within the overlay, and are separated by a deformable isolation layer. A current is flowed across the rows and columns. Any change in the distance between the rows and columns, induced by the pressure of a user input, produces a disruption in the current flow. A proportional analog response signal is transmitted to a processor, wherein the signal is used to calculate a location of the user input, and a differential in the input pressure. The device may receive and process multiple, simultaneous inputs at various locations on the overlay. An appropriate method of use for the pressure-sensitive input device is also provided.
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Hewlett--Packard Development Company, L.P.
Hjerpe Richard
Said Mansour M.
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