公开(公告)号：US10146323B1

公开(公告)日：2018-12-04

申请号：US15487021

申请日：2017-04-13

Applicant: Google LLC

Inventor： Edward Keyes ,  Michael Patrick Johnson ,  Thad Eugene Starner

IPC: G06F3/0346 ,  G06F3/01 ,  G01R33/02 ,  G06F1/16 ,  G06F3/038

Abstract: A wearable computing device such as a head-mounted display (HMD) may be equipped with a magnetometer for detecting presence and motion of a hand-wearable magnet (HWM). The HMD may analyze magnetic field measurements of the magnetometer to determine when the HWM moves within a threshold distance of the magnetometer, and may thereafter determine one or more patterns of motion of the HWM based the magnetic field measurements. The HMD may operate in a background detection state in order to determine a background magnetic field strength and to monitor for magnetic disturbances from the HWM. Upon occurrence of a trigger event corresponding to magnetic disturbance above a threshold level, the HMD may transition to operating in a gesture detection state in which it analyzes magnetometer measurements for correspondence with known gestures. Upon recognizing a known gesture, the HMD may carry out one or more actions based on the recognized known gesture.