Digitizer tablet having electrical interconnect components on the writing substrate
First Claim
1. A digitizing tablet for use with a stylus and digitizing circuit generating signals representative of the position of the stylus on the digitizing tablet, the digitizing tablet comprising:
- (a) a rigid substrate of dielectric material having a first, writing side over which the stylus is to be disposed, and a second, underside opposite said writing side;
(b) grid conductors disposed on said rigid substrate underside, said grid conductors including a first and second set of parallel, spaced apart conductors, said first and second sets of conductors disposed at any angle to each other said grid conductors formed of electrically conductive ink;
(c) a layer of dielectric ink applied on said rigid substrate at least between the points said first and second grid conductors intersect; and
(d) an electrical interconnect means on said rigid substrate integral with said grid conductors to provide a conductive path between said grid conductors and the digitizing circuit.
4 Assignments
0 Petitions
Accused Products
Abstract
A digitizing tablet for use in conjunction with a stylus and a digitizing circuit capable of generating signals representative of the position of the stylus on the digitizing tablet is disclosed. The digitizing tablet includes a sheet of glass that functions as the writing surface over which the stylus is disposed. On the underside of the glass, opposite the writing surface, there are lines of conductive ink that have been applied as two sets of parallel lines that intersect perpendicularly so as to form a grid. A dielectric ink is applied over the conductive ink to serve as a protective coating and an insulator to prevent current flow at the points the lines intersect. The lines of conductive ink terminate at surface contact pads also formed of conductive ink. Electrical components can be surface mounted to the digitizing tablet at the surface contact pads by the use of a solder, conductive adhesive or other conductive bonding media.
186 Citations
11 Claims
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1. A digitizing tablet for use with a stylus and digitizing circuit generating signals representative of the position of the stylus on the digitizing tablet, the digitizing tablet comprising:
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(a) a rigid substrate of dielectric material having a first, writing side over which the stylus is to be disposed, and a second, underside opposite said writing side; (b) grid conductors disposed on said rigid substrate underside, said grid conductors including a first and second set of parallel, spaced apart conductors, said first and second sets of conductors disposed at any angle to each other said grid conductors formed of electrically conductive ink; (c) a layer of dielectric ink applied on said rigid substrate at least between the points said first and second grid conductors intersect; and (d) an electrical interconnect means on said rigid substrate integral with said grid conductors to provide a conductive path between said grid conductors and the digitizing circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification