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System and method for detecting locations of touches on a projected capacitive touch sensor

  • US 9,727,175 B2
  • Filed: 05/14/2010
  • Issued: 08/08/2017
  • Est. Priority Date: 05/14/2010
  • Status: Active Grant
First Claim
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1. A projected capacitive touch sensor, comprising:

  • a substrate; and

    at least a first set, a second set, and a third set of electrodes coupled to a first area of the substrate, wherein;

    the first set of electrodes comprises a horizontal sensing electrode that extends along a height of a first column within the first area of the substrate;

    the second set of electrodes comprises at least two vertical sensing electrodes that extend partially along a height of a second column within the first area of the substrate; and

    the third set of electrodes comprises at least one vertical sensing electrode more than the second set of electrodes that extend partially along a height of a third column within the first area of the substrate, the third column comprising at least two vertical sensing electrodes that are physically separate with respect to each other and electrically connected to each other;

    wherein the horizontal sensing electrode in the first area of the substrate is electrically disconnected from a corresponding horizontal sensing electrode in a second area of the substrate,wherein two of the vertical sensing electrodes in the second set of electrodes are physically separated from each other at a first distance from a top edge of the first area of the substrate, andwherein the vertical sensing electrodes in the third set of electrodes are physically separated from each other at a set of distances from the top edge of the first area of the substrate, wherein distances in the set of distances are different from each other and from the first distance, and wherein at least two of the vertical sensing electrodes in the third set of electrodes have different lengths along the height of the third column.

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