Patent ID: 8026898

Claim:
A wireless mouse comprising: an optical movement detection module configured to emit light onto a mousing surface, and detect movement of the wireless mouse based on a reflection of the light emitted onto the mousing surface; a movement detection module comprising a ball configured to contact the mousing surface and rotate based on relative movement between the wireless mouse and the mousing surface; a first roller rotationally coupled to the ball, the first roller configured to rotate about a first axis; and a sensor module configured to detect movement of the wireless mouse based on a rotation of the first roller about the first axis; and a control module configured to during a time that the wireless mouse is in a stationary position, (i) power down the optical movement detection module and (ii) power up the movement detection module, and responsive to the sensor module of the movement detection module detecting movement of the wireless mouse from the stationary position, (i) power up the optical movement detection module and (ii) power down the movement detection module.