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Method and device for dual-differential sensing

  • US 9,141,216 B2
  • Filed: 12/23/2013
  • Issued: 09/22/2015
  • Est. Priority Date: 10/09/2009
  • Status: Active Grant
First Claim
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1. A dual-differential sensing method, comprising:

  • providing a sensing device, including;

    a first sensor sending a first signal value;

    a second sensor sending a second signal value; and

    a third sensor sending a third signal value;

    calculating a dual difference value by subtracting twice of said second signal value from the sum of said first signal value and said third signal value or subtracting the sum of said first signal value and said third signal value from twice of said second signal value; and

    obtaining a sensing result based on a dual differential sensing information, and determining each location on said sensing device touched or approached by at least one external object according to said sensing result;

    wherein said dual differential sensing information comprises said dual difference value, and said sensing result has two zero-crossings corresponding to a touch or proximity of an external object.

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