Patent ID: 8279194
Filing Date: 2012-10-02
Classification: G06F

Abstract:
1. A projected capacitive touch screen, comprising: a substrate that defines an active touch zone surrounded by edges, the active touch zone including a central active zone and an acceleration zone that is located proximate to, and extends along, at least one of the edges; and electrodes provided on the substrate, the electrodes being organized into first and second sets of electrodes that are contained within a common plane on the substrate, the first set of electrodes being interlaced with the second set of electrodes in a non-overlapping pattern on the substrate, wherein at least a subset of the electrodes each has an apex and a base and a non-uniform triangular shape that extends along a longitudinal axis between the apex and the base, the subset of the electrodes being located such that at least a portion of the non-uniform triangular shape is located within the acceleration zone; and wherein the non-uniform triangular shape and non-overlapping pattern provide edge acceleration to compensate for signal loss when a portion of a finger contact area moves beyond one of the edges outside the active touch zone.