MAGNETIC SENSING FOR AUTO FOCUS POSITION DETECTION

摘要

Some embodiments include a method for measuring the position of a camera lens carrier moveable by an autofocus actuator. In some embodiments, the method includes generating a measurement of a magnetic field resulting at least in part from the one or more position sensor magnets. In some embodiments, the generating the measurement of the magnetic field includes measuring a magnetic field component created at least in part by the one or more position sensor magnets fixedly mounted to the camera lens carrier. In some embodiments, the camera lens carrier is moveably coupled to a substrate by the autofocus actuator to provide motion in a direction orthogonal to the substrate. In some embodiments, the generating the measurement of the magnetic field component includes measuring the magnetic field component at a sensor fixedly mounted to the substrate of the autofocus actuator.

主权项

1. A method of measuring the position of a camera lens carrier moveable by an autofocus actuator, the method comprising:
generating a measurement of a magnetic field resulting at least in part from the one or more position sensor magnets, wherein
the generating the measurement of the magnetic field comprises measuring a magnetic field component created at least in part by
the one or more position sensor magnets fixedly mounted to the camera lens carrier,the camera lens carrier is moveably coupled to a substrate by the autofocus actuator to provide motion in a direction orthogonal to the substrate, andthe generating the measurement of the magnetic field component comprises measuring the magnetic field component at a sensor fixedly mounted to the substrate of the autofocus actuator; and calculating a position measurement for the lens carrier based at least in part upon the measurement of the magnetic field.