Anisotropic Touch Screen Element
First Claim
1. A touch sensitive position sensor comprising:
- a substrate defining a touch sensitive platform;
first and second resistive bus-bars arranged spaced apart on the substrate; and
an anisotropic conductive area having non-zero resistance arranged between the bus-bars such that currents induced in the anisotropic conductive area flow preferentially towards the bus-bars.
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Accused Products
Abstract
A touch sensitive position sensor for detecting the position of an object in two dimensions is described. The position sensor has first and second resistive bus-bars spaced apart with an anisotropic conductive area between them. Electric currents induced in the anisotropic conductive area by touch or proximity flow preferentially towards the bus-bars to be sensed by detection circuitry. Because induced currents, for example those induced by drive circuitry, flow preferentially along one direction, pin-cushion distortions in position estimates are largely constrained to this single direction. Such one-dimensional distortions can be corrected for very simply by applying scalar correction factors, thereby avoiding the need for complicated vector correction.
125 Citations
21 Claims
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1. A touch sensitive position sensor comprising:
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a substrate defining a touch sensitive platform;
first and second resistive bus-bars arranged spaced apart on the substrate; and
an anisotropic conductive area having non-zero resistance arranged between the bus-bars such that currents induced in the anisotropic conductive area flow preferentially towards the bus-bars. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification