Mouse for computer system, has optical navigation circuits that produce pointer increment signals indicative of mouse motion in orthogonal directions over mouse work surface

摘要

A pair of optical navigation circuit produces pointer increment signals indicative of a mouse motion in orthogonal directions over mouse work surface, and merit signal indicative of the correctness of the pointer increment signals. A selection circuit outputs definitive pointer increment signals corresponding to one of the pointer increment signals in accordance with a navigation selection signal.