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Touch sensor having a single sensor layer

  • US 9,478,189 B2
  • Filed: 10/30/2014
  • Issued: 10/25/2016
  • Est. Priority Date: 10/30/2014
  • Status: Expired due to Fees
First Claim
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1. A touch sensor comprising:

  • a dielectric surface layer;

    a plurality of drive electrodes disposed on the dielectric surface layer and arranged radially about a center, the drive electrodes defining a perimeter about the center, wherein each drive electrode comprises;

    an outer radial section extending radially along the perimeter;

    a central section extending from the outer radial section towards the center; and

    an inner radial section comprising a first section extending radially away from the central section in a first radial direction and a second section, shorter than the first section, extending radially away from the central section in a second radial direction; and

    a sense electrode disposed on the dielectric surface layer and arranged between two of the drive electrodes, wherein a distance between the sense electrode and the outer radial section of each of the two of the drive electrodes is associated with a thickness of each section of the drive electrode.

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