Lens actuating device

Abstract

The invention provides a lens actuating device which comprises a base, a hollow magnetic element, a lens bearing seat, a hollow coil and a magnetic conductive element, wherein the hollow magnetic element is fixed on the base to generate a first magnetic force line loop and a second magnetic force line loop; the lens bearing seat is arranged at the inner edge of the hollow magnetic element, and a sliding gap is alternately formed between the lens bearing seat and the hollow magnetic element; and the magnetic conductive element and the hollow coil are arranged on the lens bearing seat. In the invention, the first magnetic force line loop and the second magnetic force line loop generated by the hollow magnetic element generate a magnetic attraction force with the magnetic conductive element together, and the hollow coil after being electrified and the hollow magnetic element generate an electromagnetic thrust force for pushing the lens bearing seat to displace; and the magnetic conductive element is used for promoting the electromagnetic thrust force so that the magnetic attraction force interacts with the electromagnetic thrust force to displace the lens bearing seat and then locate at a target position.

Description

technical field [0001] The invention relates to a lens actuating device, in particular to an actuating device applicable to lens driving of a miniature camera module. Background technique [0002] In recent years, the trend of handheld devices equipped with camera modules has become more and more common. With the market demand for better performance and smaller size of handheld devices in the product market, camera modules are facing dual requirements of higher image quality and miniaturization. For the improvement of camera quality, on the one hand, it is to increase the pixel. The current market trend of the camera module of the handheld device is from 300,000 pixels of VGA level to gradually increase to megapixels, 2 million pixels, 3 million pixels, and even to a higher level. The four million, five million pixel development. In addition to the improvement of pixels, the clarity of the camera is also more concerned, so the camera module of the handheld device is also de...

AI Technical Summary

Problems solved by technology

[0006] However, generally speaking, although the lens positioning method can effectively achieve the positioning purpose, it requires the cooperation of multiple components to achieve it, thus resulting in the overall size of the camera module being too large, which limits the development of miniaturization, and also causes cost. Increase

In addition, by continuously supplying power to the coil to achieve the purpose of lens positioning, it will cause power consumption and energy waste

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