Abstract: Method, apparatus, and systems for roll angle estimation for an input/gesture device (IGD) are disclosed. The method includes estimating a first axis vector of the input/gesture device (IGD) relative to the surface of the mobile device (MD), as a first frame of reference, using readings from a first type of sensor; and estimating the first axis vector of the IDG relative to a different, second frame of reference using a gyroscope integration of readings from the 3-axis gyroscope. The method further includes aligning the first axis vector of the IDG in the first frame of reference with the first axis vector of the IDG in the second frame of reference; minimizing a change in the alignment of the first axis vectors between the first frame of reference and the second frame of reference; and determining the roll angle of the IDG relative to the surface of the MD.

Abstract: Method, apparatus, and systems for roll angle estimation for an input/gesture device (IGD) are disclosed. The method includes estimating a first axis vector of the input/gesture device (IGD) relative to the surface of the mobile device (MD), as a first frame of reference, using readings from a first type of sensor; and estimating the first axis vector of the IDG relative to a different, second frame of reference using a gyroscope integration of readings from the 3-axis gyroscope. The method further includes aligning the first axis vector of the IDG in the first frame of reference with the first axis vector of the IDG in the second frame of reference; minimizing a change in the alignment of the first axis vectors between the first frame of reference and the second frame of reference; and determining the roll angle of the IDG relative to the surface of the MD.

Abstract: A remote control device, e.g., a 3D pointing device, has a ring-shaped or arcuate-shaped housing and at least one sensor mounted within the housing for sensing movement of said remote control device. The housing is adapted to promote a user's arm, hand and wrist to be substantially in a neutral position when the user is holding the remote control device.

Abstract: Systems and methods according to exemplary embodiments address, among other features, the area of calibrating a sensor using a constant vector field. In one exemplary embodiment, a method for calibrating a sensor includes the steps of placing the sensor in a cube, rotating the cube between a plurality of different orientations, collecting at least one reading from the sensor from each of the plurality of different orientations and calibrating the sensor using the collected readings.

Abstract: Systems and methods according to the present invention address these needs and others by providing a system for calibrating a sensor using a constant vector field.

Abstract: A remote control device, e.g., a 3D pointing device, has a ring-shaped or arcuate-shaped housing and at least one sensor mounted within the housing for sensing movement of said remote control device. The housing is adapted to promote a user's arm, hand and wrist to be substantially in a neutral position when the user is holding the remote control device.