Magnetic Position Sensor Layout for Higher Detection Accuracy

The patent deliberately positions the magnetic field sensor off-center relative to the first magnetic field generator. Specifically, the sensor is arranged at a position where its detection surface does not coincide with the center of the magnet, creating an asymmetric configuration. This asymmetry enables the sensor to detect magnetic field components in multiple directions (including radial and tangential components) with different sensitivities, thereby achieving superior detection accuracy and performance that cannot be obtained with a centered arrangement.

The patent implements a selective overlapping arrangement where the driver overlaps only a portion of the first magnetic field generator rather than the entire generator. Specifically, the driver is positioned to overlap with the magnet in such a way that it generates sufficient driving force through magnetic interaction while leaving certain regions of the magnet exposed. This localized overlapping configuration allows the magnetic field sensor to detect magnetic field components from regions not obscured by the driver, thereby maintaining both effective driving force and accurate magnetic field detection.

The patent configures the magnetic field sensor to selectively detect specific components of the magnetic field rather than the total field. By arranging the sensor's detection surface at an optimized off-center position, the sensor is configured to primarily detect magnetic field components parallel to the first plane (which correspond to directional movement information) while filtering out or minimizing the detection of perpendicular components. This segmented detection approach enhances the precision of directional movement detection by focusing on the relevant field components.