Graphic entry tablet with improved addressing

Details Graphic entry tablet with improved addressing Graphic entry tablet with improved addressing

G - Physics

08

C

340/135.1

G08C 21/00 (2006.01) G06F 3/033 (2006.01)

Patent

CA 1079831

GRAPHIC ENTRY TABLET WITH IMPROVED ADDRESSING ABSTRACT An improved tablet system is disclosed of the type having an array of X dimension wires and Y dimension wires that are capacitively coupled to a pen that a user holds to the tablet to produce a position signal. The X and Y wires are individually coupled to drivers so that the wires on one side of the pen position can be activated and the wires on the other side can be not activated for a pen position sensing operation. To reduce the number of drivers required for a large tablet, the wires are arranged in groups with an individual driver capacitively coupled to a correspondingly positioned wire in each group. A new packaging arrangement is provided and a new system is provided for addressing the drivers to produce the selected activation pattern.

256036

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