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Touch sensor pattern

  • US 9,007,333 B1
  • Filed: 03/19/2012
  • Issued: 04/14/2015
  • Est. Priority Date: 02/23/2012
  • Status: Active Grant
First Claim
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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.

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