Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
Position sensor configuration with bias field offset compensation
Various embodiments include a position sensor configuration that compensates for a bias field offset. The position sensor configuration may be used for position sensing of components, such as camera components, that are movable via an actuator (e.g., a voice coil motor actuator). In some embodiments, the actuator may include an asymmetric magnet arrangement that produces an asymmetric magnetic field. The asymmetric magnetic field may include one or more bias field components that are offset relative to one or more axes. In some examples, the position sensor configuration may include one or more magnetic field sensor packages. Individual ones of the magnetic field sensor packages may include a magnetic field sensor and one or more compensation magnets. The compensation magnets may be configured to contribute to one or more compensation magnetic fields that counteract the bias field components such that the compensation magnetic fields compensate for the bias field offset.
Apple Inc.
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Hyuk J. Jeffrey N. Yonghua
Choi Gleason Zhao