OIS device

Abstract

The embodiment of the present invention provides an optical image stabilization (OIS) device including an casing, a magnet, an AF upper elastic member, an OIS coil, an elastic support member, an OIS bracket, an AF lower elastic member, an AF coil, an AF bracket, and a base, wherein the magnet is fixed to the inner surface of the casing; the outer side of the AF upper elastic member and the outer side of the AF lower elastic member are fixed to the casing and the base respectively; the inner side of the AF upper elastic member is fixed to the AF bracket; the inner side of the AF lower elastic member is fixed to the AF bracket; the OIS bracket is supported and fixed above the AF bracket by the elastic support member; the AF coil is wound around the AF bracket; the axis of the AF coil is in parallel with an optical axis; the OIS coil is placed vertically and wound around the OIS bracket; the axis of the OIS coil is perpendicular to the horizontal projection surface of the magnet; the OIScoil is provided therein with two integrated position sensing and driving integrated chips.

Description

technical field [0001] The invention relates to the field of optical anti-shake, in particular to an optical anti-shake device. Background technique [0002] In the field of terminal electronics, camera modules usually use VCM (Voice Coil Motor) motors to achieve focus and image stabilization functions. In order to further improve camera functions and quality, dual-camera or even multi-camera module technology is widely used in the industry. , and simultaneously introduced the anti-shake function. [0003] At present, OIS (Optical Image Stabilization, optical image stabilization) anti-shake in the industry generally adopts a moving magnet VCM structure. The coil is fixed and the magnet moves. When dual cameras and dual anti-shake are introduced, there is a common problem of magnetic interference. When the dual cameras are close to each other, the two lenses repel or attract each other due to magnetic force, resulting in the anti-shake direction being unable to move. If the ...

AI Technical Summary

Problems solved by technology

[0004] However, the dynamic open-loop structure VCM technology can only use the open-loop drive method. Since the open-loop drive cannot sense the actual position, there may be a risk that the control effect will deteriorate when the environment and structural characteristics change.

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