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COORDINATES ALGORITHM AND POSITION SENSING SYSTEM OF TOUCH PANEL

  • US 20100321328A1
  • Filed: 12/29/2009
  • Published: 12/23/2010
  • Est. Priority Date: 06/17/2009
  • Status: Abandoned Application
First Claim
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1. A coordinate algorithm of a touch panel, comprising:

  • determining the range of the x coordinates of a plurality of x-directional sensing lines and the range of the y coordinates of a plurality of y-directional sensing lines of the touch panel on the basis of a default resolution;

    obtaining the sensing capacitances of p x-directional sensing lines and q y-directional sensing lines when the touch panel is touched, wherein the sensing capacitances generated by these sensing lines exceed a threshold, and both p and q are a positive integer;

    taking the x central coordinate of the x-directional sensing lines with peak sensing capacitances as an x base coordinate, and adjusting the x base coordinate according to the ratios of the sensing capacitances of the other (p−

    1) x-directional sensing lines to the peak sensing capacitance to obtain an interpolated x coordinate; and

    taking the y central coordinate of the y-directional sensing lines with peak sensing capacitances as a y base coordinate, and adjusting the y base coordinate according to the ratios of the sensing capacitances of the other (q−

    1) y-directional sensing lines to the peak sensing capacitance to obtain an interpolated y coordinate.

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