Patent ID: 6657184
Filing Date: 2003-12-02
Classification: G06F

Abstract:
A pointing device for a computer system, the pointing device comprising:a first optical navigation circuit optically coupled to a work surface and producing first pointer increment signals indicative of motion in orthogonal directions over the work surface and a first figure of merit signal indicative of a level of confidence to be placed in the correctness of the first pointer increment signals; a second optical navigation circuit optically coupled to the work surface and producing second pointer increment signals indicative of motion in orthogonal directions over the work surface and a second figure of merit signal indicative of a level of confidence to be placed in the correctness of the second pointer increment signals; a navigation selection circuit coupled to the first and second figure of merit signals and producing a navigation selection signal that indicates which of the first and second figure of merit signals is the more favorable; a selection circuit coupled to the first and second pointer increment signals and to the navigation selection signal, and producing at an output definitive pointer increment signals corresponding to one of the first and second pointer increment signals in accordance with the navigation selection signal; and an interface having an input coupled to the definitive pointer interface signals and an output coupling corresponding signals to the computer system.