Touch sensing with mobile sensors

  • US 9,329,717 B2
  • Filed: 07/30/2007
  • Issued: 05/03/2016
  • Est. Priority Date: 01/26/1998
  • Status: Active Grant
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First Claim
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1. A method of sensing the position of an object comprising:

  • providing a deformable touch layer having a top surface accessible to a user and a bottom surface, the top surface having a length and width;

    providing a compliant dielectric layer mounted below the deformable touch layer and forming a border with the deformable touch layer;

    proving a plurality of sensors spaced apart and affixed in the region of the border, the combination of the deformable touch layer, sensors and compliant dielectric layer forming a three dimensional assembly having x and y axes correlating with the length and width, and a z axis generally perpendicular to the x and y axes;

    providing a sense object layer mounted below the compliant dielectric layer;

    sensing the presence of an object generally in the x and y axes by evaluating one or more sensors to determine which one or more sensors are closest to the object; and

    sensing the presence of an object in the z axis by evaluating one or more sensors and determining the relative position of a sensor with respect to the sense object layer, wherein sensing the presence of an object generally in the x and y axes by evaluating one or more sensors to determine which one or more sensors are closest to the object is independent of a relative position of the plurality of sensors with respect to the sense object layer.

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