Patent ID: 9007333
Filing Date: 2015-04-14
Classification: G06F

Abstract:
1. A capacitive sensor array, comprising: a first plurality of sensor elements disposed in a layer of a substrate; and a second sensor element disposed in the layer of the substrate, the second sensor element comprising a main trace intersecting each of the first plurality of sensor elements to form a plurality of intersections each associated with a unit cell, wherein each of the plurality of unit cells designates a set of locations nearest a corresponding intersection, wherein a contiguous section of the main trace crosses at least one of the plurality of unit cells, and wherein within each unit cell, at least a portion of one or more primary subtraces branches away from the main subtrace, a plurality of secondary subtraces branch away from the one or more primary subtraces, at least one tertiary subtrace branches away from at least one of the secondary subtraces, and a single bridge is coupled to a first sensor element of the first plurality of sensor elements, wherein each of the first plurality of sensor elements is a transmit (TX) sensor element and the second sensor element is a receive (RX) sensor element, and within each unit cell, an area of one of the first plurality of sensor elements is greater than an area of the second sensor element.