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TOUCH INPUT DEVICE

  • US 20120280946A1
  • Filed: 09/29/2011
  • Published: 11/08/2012
  • Est. Priority Date: 05/02/2011
  • Status: Active Grant
First Claim
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1. A touch input device comprising:

  • a touch panel receiving a touch trace formed by touching the touch panel, wherein the touch trace comprises at least one touch point;

    a driving and sensing circuit driving the touch panel and sense an actual signal value Vi of the at least one touch point, wherein if an actual contact area Ai of the at least one touch point is a basic contact area A0, the actual signal value Vi of the at least one touch point is V0i;

    a data memory storing a look up table comprising a plurality of position coordinates on the touch panel and a plurality of calibrating rules f, each of the calibrating rules f corresponding to each of the position coordinates, and used to convert V0, of the at least one touch point of the basic contact area A0 in the position coordinate to a standard signal value Vs, wherein the converting process is represented by f(V0i)=Vs, the calibrating rules f performing a function of V0i; and

    a processor calculating the position coordinate and calibrating the actual signal value Vi of the at least one touch point to a calibrated signal value V′

    i by a corresponding calibrating rule f, wherein the calibrating process is represented by f(Vi)=V′

    i.

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