Coordinate processor for a computer system having a pointing device

  • US 5,432,531 A
  • Filed: 10/07/1991
  • Issued: 07/11/1995
  • Est. Priority Date: 12/14/1990
  • Status: Expired due to Fees
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First Claim
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1. A coordinate processor for distinguishing between cursor movement commands for a display and button click commands for a relative displacement pointing device comprising:

  • stimulus detection means (200) for detecting a single tactile stimulus of an absolute position pointing device (10) exceeding a force threshold within a preselected time period and directed to a point within a data display area (610) of a computer system for forming a pushbutton within a subarea of the display area at the point of the stimulus;

    characterized in that the processor further comprises;

    coordinate locking means (210-320) for locking a current cursor position to the point within the display area corresponding to the tactile stimulus in response to said stimulus exceeding a predetermined threshold value;

    command distinguishing means responsive to the stimulative detection means to distinguish a stimulus of the pointing device for repositioning the cursor within the data display area from a stimulus of the pointing device for issuing a button click command to the computer system;

    means for issuing one or more button click commands;

    means for counting button click commands to lock the cursor position when a prescribed number of clicks identifying the command is detected; and

    means for comparing the counted click commands to a present number for release of the cursor when the counted clicks equal the present number.

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