×

Compact optical pointing apparatus and method

  • US 7,102,617 B2
  • Filed: 12/30/2002
  • Issued: 09/05/2006
  • Est. Priority Date: 12/30/2002
  • Status: Active Grant
First Claim
Patent Images

1. A display pointing device comprising:

  • a surface texture sensing circuit;

    a surface texture movement detection circuit, operatively coupled to the surface texture sensing circuit, and operative to determine at least one of;

    a direction of movement and a rate of movement, of the surface texture and to produce pointing output data for a display;

    wherein the fingerprint movement detection circuit determines at least one of a rate and a direction of movement of the skin texture by;

    modifying at least one previously stored images to produce a plurality of candidate displacement images each with an associated respective displacement movement vector;

    and compares by correlating a resolved first image against each of the plurality of candidate displacement images to produce a plurality of respectively associated displacement correlation scores;

    and wherein determining at least one of a rate and a direction of movement further includes;

    choosing the highest displacement correlation score and providing the associated respective displacement movement vector to determine the direction of movement of the skin texture.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×