Lens driving device having anti-shake function

Abstract

The invention relates to a lens driving device having an anti-shake function. An anti-shake actuator comprises first anti-shake coils which are fixed on the rear side of a magnet support, second anti-shake coils which are fixed on one side of a pedestal, first magnet components which are fixed on the magnet support and opposite to the second anti-shake coils in a spaced way, and second magnet components which are fixed on one side of the pedestal and opposite to the first anti-shake coils in a spaced way. The OIS movable part of the lens driving device having the anti-shake function only comprises one set of magnet and one set of anti-shake coil, and the other set of the magnet and the anti-shake coil are arranged in the OIS fixed part so that the weight of the movable part is greatly reduced in comparison with that of the present four sets or two pairs of magnets, the requirement for the suspension spring can be reduced and the overall size can be more compact. The movable part is only provided with one set or one pair of magnets so that magnetic interference of at least one direction can be reduced through orientation arrangement, and driving of the lens is enabled to be more accurate.

Description

technical field [0001] The invention relates to a lens driving device with an anti-shake function. Background technique [0002] With the development of science and technology, various mobile devices such as tablet computers, mobile phones or smart watches and other wearable devices will be equipped with miniature cameras. When using the above-mentioned equipment to take pictures with human hands, the shake of the hand causes the shaking, which makes the captured picture blurred. There are two main reasons for the blurred picture in the existing photography: (1) The object moves relative to the lens, causing the change of the image; (2) The deflection of the optical axis of the lens relative to the initial position of the optical axis of the lens causes changes in the image. [0003] In order to solve the above problems, an anti-shake camera device is generally used. Among them, OIS (Optical Image Stabilization, Optical Image Stabilization) detects small movements through t...

AI Technical Summary

Problems solved by technology

However, the existing OIS optical image stabilization mostly uses moving magnet four-sided magnets or four-corner magnets. This method is difficult to resist external magnetic field interference, which will cause one side of the magnet to be disturbed by the magnetic field, causing the lens to shift. The optical axis of the lens is deflected relative to the initial position of the optical axis of the lens, resulting in changes in the image, which may easily cause the image of the captured picture to be unclear

In addition, the method of setting magnets on four sides or four corners leads to a large weight and size of the movable part of the lens, which requires high suspension springs, and it is difficult to further miniaturize the driving device

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