Camera actuator and camera module including same

Abstract

An embodiment relates to a camera actuator and a camera module including same. An actuator according to an embodiment may comprise: a base; a lens housing disposed on the base; a guide pin disposed in the base; a ball disposed between the guide pin and the lens housing; a first yoke disposed in the lens housing; a magnet coupled inside the first yoke; and a coil part opposite to the magnet and fixed to the magnet while partially surrounding the first yoke. The embodiment may comprise a second yoke disposed under the first yoke and forming a closed loop together with the first yoke.

Description

technical field [0001] The present embodiment relates to a camera actuator and a camera module including the camera actuator. Background technique [0002] The camera module performs a function of taking pictures and saving the taken contents as images or videos, and is installed in mobile phones, laptops, drones and vehicles. [0003] On the other hand, mobile devices such as smartphones, tablets, and notebooks have built-in miniature camera modules, and the camera modules can perform an auto-focus function by automatically adjusting the distance between an image sensor and a lens. [0004] Recently, camera modules can perform a zoom function of zooming in or out by increasing or decreasing the magnification of the far focus point through a zoom lens. In recent years, there has been a growing demand for high-magnification zooms that are more than twice the magnification zoom performance of camera modules. [0005] On the other hand, a zoom actuator is used in a camera mod...

AI Technical Summary

Problems solved by technology

However, the spherical center of the lens group deviates from the optical axis or the decenter (decent) of the tilt, that is, the lens tilt phenomenon)

As a result, viewing angle changes or focus misalignment can occur, adversely affecting image quality and resolution

[0007] On the other hand, increasing the separation distance in the area where friction occurs reduces the frictional torque resistance when moving the lens for the zoom function in the camera module, but reduces the frictional torque resistance when making the zoom movement or reversing the zoom movement. It will deepen the decentration of the lens or the tilt of the lens, so there is a technical contradiction

[0008] In particular, if a high magnification is required in the camera module, the stroke is increased than before, and if the weight of the camera module becomes larger, the movement itself becomes more difficult

However, there is no suitable solution for both high magnification and large weight

In particular, in the case of high magnification and heavy use, there is a problem that lens off-center or lens tilt becomes more serious

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