Patent ID: 8531418

Claim:
A sensor comprising: a planar sensing area including a sensor layout, the sensor layout comprising: an interior portion, an edge portion, and edges; interior sensing elements, the interior sensing elements being located in the interior portion; and edge sensing elements, the edge sensing elements being located in the edge portion, wherein: the interior sensing elements are arranged in the sensor layout such that at least half of the interior sensing elements do not extend beyond a predetermined distance from the edges; and the edge sensing elements are arranged to extend beyond the predetermined distance and interlace with the interior sensing elements in the interior portion, wherein: the interior sensing elements and the edge sensing elements each have widths that vary non-monotonically from a center of the interior and edge sensing elements along two substantially perpendicular directions on the sensor layout, and centroid; and the sensor determines a two-dimensional location for a touch overlapping the sensing elements using a weighting that is proportional to an overlap area of the sensor elements and their centroids; a controller; and a connector, the connector coupling the planar sensing area to the controller.