×

Method and device for dual-differential sensing

  • US 8,643,613 B2
  • Filed: 10/08/2010
  • Issued: 02/04/2014
  • Est. Priority Date: 10/09/2009
  • Status: Active Grant
First Claim
Patent Images

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 signal value; and

    a third sensor sending a third signal value;

    calculating a first difference value between said first signal value and said second final value;

    calculating a second difference value between said second signal value and said third signal value;

    calculating a dual difference value between said first difference value and said second difference 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.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×