Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Patent
1994-01-28
1998-02-17
Saras, Steven
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
178 18, 341 26, G09G 500
Patent
active
057195978
ABSTRACT:
A scanning apparatus for uniquely identifying an actuated key on a keyboard and an actuated location in a drawing tablet. The scanning apparatus includes independently actuatable switches associated with the keyboard. The scanning apparatus also includes vertical and horizontal conducting traces juxtaposed one to another and electrically connected to a horizontal and vertical resistive bar, respectively, associated with the drawing tablet. The switches and traces are energized under control of the apparatus such that portions of each can be actuated by a user resulting in the generation of unique analog signals indicative of the particular key and particular location upon the drawing tablet actuated by the user. These unique analog signals are converted to digital signals for further processing.
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Saras Steven
VTech Electronics Ltd.
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