Patent ID: 8497465

Claim:
A head-mounted switch system comprising: a mount portion rotatable around a rotation axis; an electronic device mounted to the mount portion; a power source configured to switchably supply power to the electronic device; a plurality of accelerometers operable to measure an acceleration of the mount portion; and a processor configured to receive acceleration data from the plurality of accelerometers, wherein the processor is configured to determine whether the mount portion is rotating around the rotation axis based on the acceleration data, the processor is programmed to change a power state of the electronic device when the mount portion is rotating around the rotation axis, the mount portion rotates around a first rotation axis in a clockwise or counterclockwise direction and a second rotation axis around a second rotation axis in an upward or downward direction, at least one of the plurality of accelerometers is positioned at a first distance from the rotation axis, and at least another one of the plurality of accelerometers is positioned at a second distance from the rotation axis different from the first distance, and the processor is configured to determine whether a measured acceleration corresponds to a rotation of the mount portion around the rotation axis or a movement of a user's head associated with the mount portion, based on measured accelerations of both the one and other accelerometers, and the processor includes a module for calculating a ratio, wherein the ratio is calculated between the measured accelerations of the one and other accelerometers, and when the ratio is approximately equal to predetermined ratio between the first and second distances, the module determines that the measured accelerations correspond to a rotation of the mount portion.