Camera actuator and camera module comprising same

Abstract

An embodiment relates to a camera actuator and a camera module comprising same. A camera actuator according to an embodiment may comprise: a housing; a base which is coupled to the housing and on which a lens assembly is disposed; a shaper unit disposed in the housing; a first driving part coupled to the shaper unit; and a prism unit coupled to the housing. The housing may comprise a housing body having an opening formed therethrough and a housing side part extending from the housing body. The first driving part may be disposed to overlap with the prism unit in the direction vertical to an optical axis.

Description

technical field [0001] Embodiments relate to a camera actuator and a camera module including the same. Background technique [0002] The camera module performs a function of photographing an object and storing the object as an image or a moving image, and is mounted on a mobile terminal such as a mobile phone, a notebook computer, a drone, a vehicle, and the like. [0003] Camera actuators are products that quickly focus by moving the lens in the camera module up, down, left, and right. Ultra-thin or ultra-thin issues, low power consumption, and low cost are the main technical issues in camera actuators. [0004] Such camera modules are applied to mobile camera modules, vehicle camera modules, and the like. [0005] A mobile camera module is an important part for taking and storing pictures in mobile devices such as smartphones and tablets. The mobile camera module uses an image sensor to convert the light entering the lens into an electrical signal, outputs the picture t...

AI Technical Summary

Problems solved by technology

[0031] In addition, refer to figure 1 , the conventional OIS technology can implement AF or zoom while OIS driving, but due to the space limitation of the camera module and the position of the driving part of the conventional OIS technology, the magnet for OIS and the magnet for AF or zoom are arranged close to each other, and Causes magnetic field interference, and thus has the following problems: OIS driving is not performed normally, and eccentricity or tilt phenomenon is caused, which causes problems in the accuracy of OIS data, and affects the safety and lives of drivers and pedestrians

However, in order to improve the accuracy of data in OIS driving, the flatness of the gyro sensor is important, but there is a problem that it is difficult to achieve the required level of accuracy

[0033] In addition, according to the related art, since the gyro sensor is arranged to be spaced apart from the camera module 10, it is difficult to accurately detect the degree of movement of the camera module according to the movement of the user.

For example, when the user rotates the camera module 10 around the gyro sensor 15, the difference between the degree of movement of the gyro sensor 15 and the degree of movement of the actuator 11 or the lens unit 12 becomes large, and thus there is a gap in the angular acceleration data. The problem of reduced precision

[0034] In addition, recently, according to technological development trends, ultra-thin and ultra-compact camera modules are required, but since ultra-compact camera modules have space constraints for OIS drives, there is a problem that it is difficult to realize the OIS function applied to general large cameras, and there is a problem of applying OIS When driving, it is impossible to achieve ultra-thin and ultra-compact camera modules

[0035] In addition, in conventional OIS technology, an OIS driver is arranged at a side surface of a solid-state lens assembly within a limited camera module size, and thus there is a problem that it is difficult to secure a sufficient amount of light due to the limited size of a lens subject to OIS.

[0036] Specifically, in order to achieve the best optical characteristics in a camera module, the alignment between the lens groups during OIS implementation should be well matched by the movement of the lens or the tilt of the module, however, in conventional OIS technology, when There is a problem of adversely affecting image quality or resolution when the center of the sphere between the lens groups deviates from the decentering of the optical axis or tilting occurs as a phenomenon of lens tilting

[0037] In addition, in the conventional OIS technology, since a mechanical driving device is required to move the lens or tilt the module, there are problems of complicated structure and increased power consumption

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