Patent ID: 9058081
Filing Date: 2015-06-16
Classification: G06F,H03K,Y10T

Abstract:
1. A navigation device comprising: a housing having a transparent window on an external surface thereof, said transparent window defining a mousing surface; a proximity detector carried internally by said housing and comprising an array of single photon avalanche diodes (SPADs) configured to detect three-dimensional movement of an adjacent activator relative to said mousing surface; an illumination source carried internally by said housing and configured to transmit illumination through said transparent window and to be reflected by the activator through said transparent window and to said array of SPADs; and a controller configured to calculate a phase change between transmitted illumination and illumination received following reflection from the activator, and to determine a range of the activator to said housing based upon operating said illumination source with a plurality of different modulation frequencies.