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Coordinates input method

  • US 6,670,561 B2
  • Filed: 08/10/2001
  • Issued: 12/30/2003
  • Est. Priority Date: 05/08/2000
  • Status: Expired due to Fees
First Claim
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1. A method for generating a pseudomouse pointer signal when using a digitizer or tablet having arrays of orthogonal sensing coils corresponding to standard or absolute position coordinates rather than relative movement coordinates, as are customarily used with a mouse pointer, comprising the method steps of:

  • (a) providing a coordinate input system which consists of (i) a movable coordinates indicator adapted to be grasped and displaced by a user'"'"'s hand, (ii) a tablet having arrays of orthogonal sensing coils corresponding to absolute position coordinates, said tablet configured to detect the position of said movable coordinates indicator and to generate a position data signal in response thereto, and (iii) a host computer responsive to said tablet position data signal for generating a display signal;

    (b) detecting the initial position of said movable coordinates indicator on said tablet before any displacement of said movable coordinates indicator by the user and generating an initial position data signal in response thereto;

    (c) displacing said movable coordinates indicator across the tablet;

    (d) sensing said displacement of said movable coordinates indicator with said tablet sensing coils;

    (e) sensing a disposition of said movable coordinates indicator on said tablet after displacement of said movable coordinates indicator by the user, and, in response, generating an after displacement position data signal corresponding to the coordinate values of said movable coordinates indicator on said tablet after displacement of said movable coordinates indicator by the user;

    (f) transmitting said initial position data signal to said host computer from said tablet;

    (g) transmitting said after displacement position data signal to said host computer from said tablet; and

    (h) computing relative pseudomouse movement coordinates from (i) the absolute tablet coordinates, (ii) the initial position data and (iii) the after displacement position data.

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