Lens assembly

Abstract

Embodiments relate to a lens assembly, a lens driving apparatus, and a camera module comprising same. A lens assembly according to an embodiment may comprise: a first pin; a first housing which movesalong the first pin; a first lens group arranged in the first housing; and a first wheel which is arranged in the first housing and moves along the first pin. The first wheel may include a first rotary shaft coupled to the first housing, and a first rotation portion which rotates about the first rotary shaft. The first rotation portion may include a groove corresponding to the first pin, wherein the maximum depth of the groove may be less than one-half the maximum thickness of the first pin in a direction perpendicular to the first rotary shaft.

Description

technical field [0001] This embodiment relates to a lens (lens, lens) assembly, a lens driving device, and a camera module including the lens assembly and the lens driving device. Background technique [0002] The camera module performs a function of photographing a subject (subject) and storing it as an image or video, and is installed in a mobile terminal such as a mobile phone, a notebook computer, a drone, and a vehicle. [0003] On the other hand, portable devices such as smartphones, tablets, and laptops have built-in ultra-compact camera modules that automatically adjust the distance between the image sensor and the lens to align the focal length of the lens with the autofocus function (align, match). [0004] Recently, a camera module may perform a zooming function of zooming up or zooming out of a photo by increasing or decreasing a magnification of a distant object through a zoom lens. [0005] On the other hand, frictional torque is generated in the process of m...

AI Technical Summary

Problems solved by technology

However, if decentering or tilting occurs such that the center of the sphere between the lenses is off the optical axis, the angle of the image can change or be out of focus, which can adversely affect image quality or resolution

[0007] On the other hand, in the case of increasing the interval in the moving area to reduce the frictional torque resistance when moving the lens for the zoom function in the camera module, Technical inconsistency in the presence of lens off-centre or lens tilt during the zoom movement or the inverse of the zoom movement

[0008] In addition, there is a problem that it is difficult to implement the zoom function that is applied to generally large cameras, because the compact camera module has certain size constraints and the zoom has space constraints

[0009]Furthermore, although it is important to sense the position of the lens moved during zooming in the camera module, there is a technical problem that, in the related art, measuring Reduced reliability of the position of the lens being moved during zooming

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