Camera actuator and camera module and camera device including the same

Abstract

A camera actuator according to an embodiment may include: a housing; a prism unit disposed in the housing; and a prism driving unit and a shaft unit disposed in the housing so as to tilt the prism unit in a first axis direction or a second axis direction, in which the shaft unit includes a first shaft disposed in a direction parallel to the first direction, and a second shaft and a third shaft disposed in a direction perpendicular to the first direction.

Description

technical field [0001] Embodiments relate to a camera actuator, a camera module including the camera actuator, and a camera device. Background technique [0002] The camera module captures an object and stores it as an image or video, and the camera module is installed in mobile terminals such as mobile phones, notebook computers, drones, and vehicles. [0003] On the other hand, portable devices such as smartphones, tablets, and notebooks have built-in miniature camera modules. Such a camera module may perform an auto focus (AF) function that automatically adjusts a distance between an image sensor and a lens to align the focal length of the lens. [0004] In addition, recent camera modules can perform a zoom function of zooming in or out by increasing or decreasing a magnification of a distant object through a zoom lens. [0005] In addition, recent camera modules employ image stabilization (IS) technology that corrects or prevents image shake due to camera movement caus...

AI Technical Summary

Problems solved by technology

However, if there is decentration of the center of the spherical surface between the lens groups from the optical axis, or a tilt phenomenon in which the lenses are tilted, or a phenomenon in which the lens groups are not aligned with the central axis of the image sensor, the angle of view may change or the focus may be out of focus, Such phenomena may adversely affect image quality or resolution

[0012] On the other hand, in the case of trying to increase the spacing in areas where friction occurs in order to reduce the frictional torque resistance when moving the lens for the zoom function in the camera module, there is the following technical problem: when the zoom movement is reversed or when the zoom movement, Exacerbated lens decentration or lens tilt

In addition, when performing AF or zooming, multiple lens assemblies are driven by electromagnetic force between magnets and coils, but there is a problem in that magnetic field interference occurs between magnets mounted on each lens assembly

[0040] However, when the height of the coil is increased in this way, since the magnetic flux of the magnet is blocked by the coil, there is a technical contradiction as follows: the sensitivity of the Hall sensor provided inside the coil is weakened

Images