Driving device for realizing automatic focusing of camera

Abstract

The invention relates to a driving device for realizing automatic focusing of a camera, and the device is provided with a support module and a moving part suitable for mounting and assembling a lens.The moving part is assembled on the support module through a suspension system to realize the movement along the optical axis of the lens. The device further comprises a pair of driving modules. The driving modules are symmetrically arranged on the opposite sides of the moving part. The driving modules are driven based on the SMA wire thermal contraction principle and provided with driving arms topush the moving part to move along the optical axis of the lens, wherein the directions of the two driving modules for driving the moving part to move along the optical axis of the lens are consistent, and single-direction inclination angle adjustment of the lens is achieved through the separate control of the two driving modules. The automatic focusing of the lens is driven by utilizing the characteristic that the SMA wire is heated to shrink, and the closed-loop control over movement of the lens is achieved by utilizing resistance of the SMA wire as feedback; the product structure is light,handy and miniaturized, and the control is easy, convenient and accurate.

Description

technical field [0001] The present invention relates to the field of camera technology, in particular to the field of camera focusing technology applied to portable electronic devices such as mobile phones or tablet computers. Background technique [0002] With the development and popularization of portable electronic devices such as mobile phones or tablet computers, the requirements for the camera functions attached to them are also relatively improved. In order to realize the focus and zoom of the camera, it is necessary to arrange a driving device in the narrow space of the camera to drive the lens to move along the optical axis. Due to the narrow space, the type of construction of the drive device that can be used is limited. In the prior art, the camera is mainly driven by a magnet and coil structure, but the structure is still relatively complicated, and the volume is difficult to reduce, which cannot meet the requirements of product miniaturization. Contents of th...

AI Technical Summary

Problems solved by technology

Due to the small space, it also limits the type of drive structure that can be used

In the existing technology, the camera mainly uses the magnet and coil structure to realize the drive, but the structure is still relatively complicated, and the volume is difficult to reduce, which cannot meet the requirements of product miniaturization.

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