BACKGROUND

Technical Field

The present disclosure relates to a lens driving module. More particularly, the present disclosure relates to a lens driving module applicable to mobile terminals.

Description of Related Art

In general, the voice-coil motor (VCM) cooperated to an open-loop controlling method is applied to the lens for providing an auto-focusing. However, the conventional VCM cannot provide feedback signal to the actuator during moving the lens, so that the present position of the lens cannot be notified immediately. Hence, the lens should be moved to the original position before focusing every time, that is, the focusing time would be lengthened and the operation would not be fluency.

Furthermore, it is inevasible for camera shake during operation. However, the lens can be merely moved in the direction parallel to the lens and cannot be moved in the direction orthogonal to the lens via the conventional VCM. Hence, it cannot compensate for the shaking drift amount from the camera shake to get stable image so as to degrade the shooting result and affect the shooting experience.

SUMMARY

According to one aspect of the present disclosure, a lens driving module includes a holder, a cover, a carrier, at least one first magnet, a first coil, at least two second magnets, at least one first sensor and at least one second sensor. The holder includes an opening hole. The cover is made of metal material and coupled to the holder. The carrier is movably disposed in the cover and for coupling to a lens, wherein a moving direction of the carrier includes a first direction which is parallel to an optical axis of the lens. The first magnet is movably disposed in the cover, wherein a moving direction of the first magnet includes a second direction which is orthogonal to the optical axis of the lens. The first coil is wound around an outer side of the carrier and adjacent to the first magnet. The second magnets are disposed on one end of the carrier which is toward the holder. The first sensor is a Hall sensor, and for detecting a magnetic field of any one of the second magnets, wherein the magnetic field is varied according to a relative displacement between the first sensor and the second magnet which is detected. The second sensor is for detecting a magnetic field of the first magnet, wherein the magnetic field is varied according to a relative displacement between the second sensor and the first magnet which is detected.

