阅读说明：本技术 摄像头模块 (Camera module ) 是由 金昶年 金敬源 于 2019-09-05 设计创作，主要内容包括：实施方式涉及一种摄像头模块和一种用于摄像头模块的驱动装置。根据实施方式的摄像头模块可以包括：镜头模块；第一支架,该第一支架包括第一圆化表面并且第一支架能够通过联接至镜头模块而移动；第二支架,该第二支架包括与第一圆化表面相对应的第二圆化表面；滚珠支承件,该滚珠支承件设置在第一支架的第一圆化表面与第二支架的第二圆化表面之间；以及驱动单元,该驱动单元设置在镜头模块与第二支架之间。第二支架的第二圆化表面的宽度和高度可以大于第一支架的第一圆化表面的宽度和高度。(Embodiments relate to a camera module and a driving apparatus for the camera module. The camera module according to the embodiment may include: a lens module; a first carriage comprising a first rounded surface and movable by coupling to the lens module; a second leg comprising a second rounded surface corresponding to the first rounded surface; a ball bearing disposed between the first rounded surface of the first bracket and the second rounded surface of the second bracket; and a driving unit disposed between the lens module and the second support. The width and height of the second rounded surface of the second leg may be greater than the width and height of the first rounded surface of the first leg.)

1. A camera module, comprising:

a lens module;

a first mount comprising a first rounded surface and that moves when coupled to the lens module;

a second leg comprising a second rounded surface corresponding to the first rounded surface; and

a ball bearing disposed between the first rounded surface of the first bracket and the second rounded surface of the second bracket;

a driving unit disposed between the lens module and the second bracket,

wherein the width and height of the second rounded surface of the second leg is greater than the width and height of the first rounded surface of the first leg.

2. A camera module, comprising:

a lens module;

a first mount comprising a first rounded surface and that moves when coupled to the lens module;

a second leg comprising a second rounded surface corresponding to the first rounded surface; and

a ball bearing disposed between the first rounded surface of the first bracket and the second rounded surface of the second bracket;

a driving unit disposed between the lens module and the second bracket,

wherein the first rounded surface of the first holder comprises at least two first cell rounded surfaces, and the two first cell rounded surfaces are disposed opposite to each other around the lens module, and

wherein the second rounded surface of the second stent comprises at least two second cell rounded surfaces, and each of the at least two second cell rounded surfaces is disposed to correspond to each of the at least two first cell rounded surfaces.

3. A camera module, comprising:

a lens module;

a first mount comprising a first rounded surface and that moves when coupled to the lens module;

a second leg comprising a second rounded surface corresponding to the first rounded surface; and

a ball bearing disposed between the first rounded surface of the first bracket and the second rounded surface of the second bracket; a driving unit disposed between the lens module and the second bracket,

wherein the lens module rotates along the second rounded surface with respect to an optical axis, and

wherein the lens module is driven up and down along the second rounded surface based on the optical axis.

4. The camera module of any of claims 1-3, wherein the ball bearings move along the first and second rounded surfaces such that the lens module rotates based on an optical axis.

5. A camera module according to any of claims 1-3, wherein said ball bearings move along said first and second rounded surfaces such that said lens module is tilted with respect to a virtual plane perpendicular to the optical axis.

6. A camera module according to any of claims 1-3, wherein said first rounded surface is provided on an outer surface of said first bracket and said second rounded surface is provided on an inner surface of said second bracket.

7. A camera module according to any one of claims 1 to 3, wherein the upper end of the first bracket is disposed lower than the upper end of the second bracket.

8. A camera module according to any of claims 1-3, wherein said first cradle comprises a first recessed area formed on an inner surface of said first cradle and disposed at a location corresponding to said first rounded surface.

9. A camera module according to any one of claims 1 to 3, wherein said second support comprises a second recessed region formed on an outer surface of said second support and disposed at a location corresponding to said second rounded region.

10. The camera module according to claim 9, wherein the first bracket comprises a ball receiving part in which the ball bearing is disposed, and the ball receiving part is disposed at a position corresponding to the first recessed area.

Technical Field

The present embodiment relates to a camera actuator and a camera module including the same.

Background

The camera module performs a function of photographing a subject and storing it as an image or video, and is mounted on a mobile terminal such as a mobile phone, a laptop, a drone, or a vehicle.

On the other hand, portable devices such as smartphones, tablet computers, and laptop computers have built-in miniature camera modules, and these camera modules automatically adjust the distance between an image sensor and a lens to align the focal distance of the lens so that an auto-focus (AF) function can be performed.

For example, recent camera modules can perform a zoom function of zooming in or out by increasing or decreasing the magnification of a distant object by means of a zoom lens.

Further, recently, the camera module employs an Image Stabilization (IS) technique to correct or prevent image shake due to an unstable fixture or camera movement caused by user movement. These IS technologies include an Optical Image Stabilizer (OIS) technology and an anti-shake technology using an image sensor.

The OIS technique is a technique of correcting a motion by changing an optical path, and the anti-shake technique using an image sensor is a technique of correcting a motion mechanically and electronically, and the OIS technique is more widely adopted.

On the other hand, when the image sensor reaches a higher pixel so that the size of the pixel is reduced, the image sensor has a higher resolution. However, as the pixel becomes smaller, the amount of light received at the same time also decreases. Therefore, in a dark environment, the higher the camera pixel, the more serious the image blur due to hand shake that occurs when the shutter speed is reduced.

Therefore, in order to capture an image without distortion using a high-pixel camera in the dark or particularly in video, the OIS function has been basically adopted recently.

On the other hand, the OIS technology is a method of correcting an optical path by moving a lens of a camera or an image sensor to correct image quality. The OIS technology detects the motion of the camera through a gyro sensor. Based on this, the distance that the lens or image sensor should move is calculated. For example, the OIS correction method includes a lens shift method and a lens tilt method.

Meanwhile, video recording using a mobile phone camera has recently been widely used, and personal internet live broadcast such as afreca TV through real-time video recording is also becoming popular. When the OIS function is operated while recording such a video, distortion of the video is rather severe, thereby having a problem of causing a booming sound to a user or viewer.

For example, fig. 1a is a conceptual diagram of OIS by a lens shift method in a camera module according to the related art, and fig. 1B is a conceptual diagram of OIS by a lens tilt method in a camera module according to the related art.

Referring to fig. 1a, in the case of the lens shift method in the related art, the optical axis, which is a reference of a point having a spatial resolution (SFR) value in the image sensor, repeatedly moves from Z1 to Z2 according to the movement of the lens. The distortion of the video is severe and gives the user a rumble or the like, and this problem also occurs in the sensor shift method.

Further, referring to fig. 1b, in the case of the conventional lens tilting method in the related art, since the optical axis repeatedly moves from Z1 to Z2 according to the tilt of the lens, the distance between the lens and the image sensor is changed. Further, when the optical axis, which is a reference of a spatial resolution (SFR) value, moves, distortion of a video will be more serious. These problems occur in the sensor tilting method.

However, any appropriate technical solution cannot be prepared for the above-described problems.

Meanwhile, the related art OIS technology is complicated in structure, and there is a limitation in implementing a micro camera module because a mechanical actuator is required for lens movement and a driving element or a gyro sensor must be installed.

Disclosure of Invention

Technical problem

The present embodiment provides a camera module capable of providing an excellent OIS function that does not distort an image even during video recording, and an actuator for the camera module.

Further, the present embodiment is to solve the above technical problems and at the same time provide a micro camera module.

The technical problem of the present embodiment is not limited to what is described in the present item, and includes what is understood from the description of the present invention.

Technical solution

The camera module according to the embodiment includes: a lens module; a first bracket including a first rounded surface and moving when coupled with the lens module; a second leg comprising a second rounded surface corresponding to the first rounded surface; a ball bearing disposed between the first rounded surface of the first bracket and the second rounded surface of the second bracket; and a driving unit disposed between the lens module and the second support.

The width and height of the second rounded surface of the second leg may be greater than the width and height of the first rounded surface of the first leg.

Further, a camera module according to the present embodiment includes: a lens module; a first bracket including a first rounded surface and moving when the lens module is coupled; a second leg comprising a second rounded surface corresponding to the first rounded surface; a ball bearing disposed between the first rounded surface of the first bracket and the second rounded surface of the second bracket; and a driving unit disposed between the lens module and the second support.

The first rounded surface of the first holder may include at least two first unit rounded surfaces, and the two first unit rounded surfaces may be disposed opposite to each other around the lens module.

The second rounded surfaces of the second stent may comprise at least two second cell rounded surfaces, and each of the at least two second cell rounded surfaces may be disposed to correspond to each of the at least two first cell rounded surfaces.

Further, a camera module according to the present embodiment includes: a lens module; a first bracket including a first rounded surface and moving when the lens module is coupled; a second leg comprising a second rounded surface corresponding to the first rounded surface; a ball bearing disposed between the first rounded surface of the first bracket and the second rounded surface of the second bracket; and a driving unit disposed between the lens module and the second support.

The lens module may be rotated along the second rounded surface with respect to the optical axis, and the lens module may be driven vertically along the second rounded surface with respect to the optical axis.

In an embodiment, the ball bearing may move along the first rounded surface and the second rounded surface such that the lens module rotates relative to the optical axis.

The ball bearing may move along the first rounded surface and the second rounded surface such that the lens module is tilted based on a virtual plane perpendicular to the optical axis.

The first rounded surface may be disposed on an outer surface of the first bracket.

The second rounded surface may be disposed on an inner surface of the second bracket.

The upper end of the first bracket may be disposed lower than the upper end of the second bracket.

The first leg includes a first recessed region on an inner surface of the first leg and disposed at a location corresponding to the first rounded surface, and the second leg includes a second recessed region on an outer surface of the second leg and disposed at a location corresponding to the second rounded surface.

The present embodiment further includes a circuit board disposed under the second bracket and controlling the driving unit, the circuit board including a rigid circuit board and a flexible circuit board, and a portion of the flexible circuit board may be disposed in the second recess region of the second bracket.

The first bracket may include a ball receiving part in which the ball bearing is disposed, and the ball receiving part may be disposed at a position corresponding to the first recess region.

The driving unit may include a first driving unit generating an electromagnetic force in the optical axis direction and a second driving unit generating an electromagnetic force in a direction perpendicular to the optical axis direction.

The first drive unit includes a first coil unit coupled to the first bracket and a first magnet unit coupled to the second bracket, and the second drive unit includes a second coil unit coupled to the first bracket and includes a second magnet portion coupled to the second bracket.

The first bracket may include a ball receiving part in which the ball bearing is disposed.

Further, the camera module according to the embodiment may include: a lens module; a first support supporting and driving the lens module; a second bracket accommodating the first bracket; the ball is arranged between the first bracket and the second bracket; and a driving unit for driving the lens module.

Further, the driving apparatus of a camera module according to the embodiment includes: a first support supporting and driving a predetermined lens module; a second bracket accommodating the first bracket; a driving unit driving the first support; and a circuit board for controlling the driving unit.

[ advantageous effects ]

The present embodiment can provide a camera module capable of providing a good OIS function that does not distort an image even when capturing video, and an actuator for the camera module.

In addition, the present embodiment has a technical effect of being able to provide the above technical effect while also providing a micro camera module.

Further, the present embodiment is a method of moving the entire module including the lens and the image sensor. Compared to the lens shift method, the present embodiment has a technical effect in that the correction range is wider, and since the optical axis of the lens and the axis of the image sensor are not distorted, image distortion can be minimized.

The technical effects of the present embodiment are not limited to what is described in the present item, and include what is understood from the description of the present invention.

Drawings

Fig. 1a is a conceptual diagram of OIS by a lens moving method in a camera module according to the related art.

Fig. 1b is a conceptual diagram of OIS by a lens tilting method in a camera module according to the related art.

Fig. 2a is a perspective view illustrating a camera module according to an embodiment.

Fig. 2b is a bottom perspective view of a camera module according to an embodiment.

Fig. 3 is an exploded perspective view of a camera module according to an embodiment.

Fig. 4a is a cross-sectional perspective view taken along line a1-a1' of a camera module according to the embodiment shown in fig. 2 a.

Fig. 4b is a cross-sectional view taken along line a1-a1' of a camera module according to the embodiment shown in fig. 2 a.

Fig. 5 is a partially enlarged view of a first region B1 of the camera module according to the embodiment shown in fig. 4B.

Fig. 6a is a cross-sectional view taken along line a2-a2' of a camera module according to the embodiment shown in fig. 2 a.

Fig. 6B is a partially enlarged view of a second region B2 of the camera module according to the embodiment shown in fig. 6 a.

Fig. 6c is a partial enlarged view of the third region B3 of the camera module according to the embodiment shown in fig. 6 a.

Fig. 7 is a perspective view of a first bracket and a driver in a camera module according to the embodiment shown in fig. 2 a.

Fig. 8a and 8b are exemplary views of driving a camera module according to an embodiment.

Fig. 9 is an exemplary view of a spring in a camera module according to an embodiment.

Fig. 10 is an exemplary view of coupling a spring and a first bracket in a camera module according to an embodiment.

Detailed Description

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Since the embodiments may be modified in various ways and have different forms, specific embodiments will be shown in the drawings and described in detail herein. However, it is not intended to limit the embodiments to the particular type disclosed, and it should be understood that all modifications, equivalents, and alternatives are included in the spirit and scope of the embodiments.

Terms such as "first" and "second" may be used to describe various elements, but these elements should not be limited by the terms. These terms are used for the purpose of distinguishing one element from another. In addition, terms specifically defined in consideration of the configuration and operation of the embodiments are only used to describe the embodiments, and do not limit the scope of the embodiments.

In the description of the present embodiment, in the case of being described as being formed "upper (above)" or "lower (below)" of each element, the upper (top) or lower (below) includes two elements that are in direct contact with each other or two elements in which one or more other elements are indirectly formed between the two elements. Further, when it is expressed as "upward (upper)" or "up or down", not only the meaning based on the upward direction of one element but also the meaning based on the downward direction of one element may be included.

Furthermore, the use of relational terms, such as "top/upper" and "bottom/lower" below, and the like, as used herein do not necessarily require or imply any physical or logical relationship or order between the entities or elements, which may be used to distinguish one entity or element from another.

(embodiment mode)

Fig. 2a is a perspective view illustrating a camera module 201 according to an embodiment, fig. 2B is a bottom perspective view of the camera module 201 according to an embodiment, and fig. 3 is an exploded perspective view of the camera module 201 of the embodiment shown in fig. 2 a.

In the embodiment, a direction parallel to the optical axis of light may be referred to as a z-axis, and a plane perpendicular to the optical axis may be an xy plane, and in the xy plane, an x-axis and a y-axis may be defined as directions perpendicular to each other, but is not limited thereto. In this case, the x-axis may be defined as a horizontal coordinate axis, and the y-axis may be defined as a vertical coordinate axis, but the present invention is not limited thereto.

The movement of the camera module may include linear movement that moves along an axis and rotational movement that rotates about an axis in the large view.

As shown in fig. 2a, the rotational motion may include pitch, which is a vertical rotational motion along the x-axis, which is the horizontal coordinate axis of the camera module; and a yaw (yaw), which is a horizontal rotational movement along a y-axis, as a rotational axis, the y-axis being a vertical coordinate axis of the camera module; and a roll, which is a rotational motion along a z-axis, which is an optical axis passing in the front-rear direction, as a rotational axis. Pitch and yaw may be rotation in the x-axis or y-direction.

The camera module according to the embodiment may be applied to both the front or rear of the mobile phone and the bottom and rear of the mobile phone.

Referring first to fig. 3, fig. 3 is an exploded perspective view of the camera module 201 of the embodiment shown in fig. 2 a. The camera module 201 of this embodiment may include a lens module 200, a first bracket 310, a ball bearing 316, a second bracket 320, a driving unit 340, and a circuit board 350.

Hereinafter, technical features will be described in detail with reference to fig. 2a and 2 b.

First, referring to fig. 2a, the camera module 201 of the present embodiment includes a circuit board 350, an image sensor (not shown) disposed on the circuit board 350, a lens unit 220 disposed on the image sensor, and a housing 210 accommodating the lens unit 220. The image sensor, the lens unit 220, and the housing 210 may be referred to as a lens module 200.

The camera module 201 of the present embodiment may include a separate AF driver, such as VCM, MEMS, piezoelectric, liquid lens, or the like.

In the present embodiment, the image sensor substrate may be integrally formed with the circuit board 350 or may be separately formed. For example, in an embodiment, when the substrate of the image sensor is formed separately from the circuit board 350, the substrate of the image sensor and the circuit board 350 may be electrically connected to each other.

Further, the camera module 201 of the present embodiment includes: a gyro sensor (not shown) provided on the circuit board 350 to detect a motion; a module driving unit driving the lens module 200 according to an input/output signal from the gyro sensor; and a driving circuit element (not shown) for controlling the module driver 300.

The module driving unit 300 includes a first bracket 310 supporting and driving the lens module 200, a second bracket 320 receiving the first bracket 310, and a driving unit 340 driving the first bracket 310.

The module driving unit 300 may move the lens module 200 coupled to the first support 310 in pitch, yaw, and roll with respect to x, y, and z axes.

The first support 310 supports the configurations of the lens module 200 and the module driving unit 300, such as coils, and performs pitch, yaw, and roll operations together with the AF function of the lens module 200.

The second bracket 320 may be a fixed member for receiving the first bracket 310 but performing the pitching, yawing and rolling operations of the lens module 200 through the first bracket 310.

In the present embodiment, the second bracket 320 may be fixed to the mobile phone, and the first bracket 310 may be attached to the camera module to guide the operation of the camera module.

Referring briefly to fig. 9, the first holder 310 and the second holder 320 may be coupled by a predetermined spring 400, and an initial position of the lens module 200 may be set by the spring 400. The spring 400 may include an outer support portion 410, a spring portion 420, and an inner support portion 430. The outer support 410 may support or be fixed to the second bracket 320, and the inner support 430 may support or be fixed to the first bracket 310.

Meanwhile, in another embodiment, an initial position of the lens module 200 may be disposed between the first holder 310 and the second holder 320 by a predetermined magnetic force.

Next, fig. 10 is an exemplary view of coupling the spring 400 and the first bracket 310 in the embodiment.

For example, the inner support 430 of the spring 400 may support or be fixed to the first bracket 310.

Referring back to fig. 2a, the camera module 201 of the present embodiment includes a shield (not shown) on the outer surfaces of the first bracket 310, the second bracket 320, and the lens module 200. The shield may be referred to as a cap housing. The shield is formed of a metal material such as steel (SUS), and can shield electromagnetic waves flowing into and out of the camera module and also prevent foreign substances from entering the camera module.

Next, in the camera module 201 of the present embodiment, the image sensor uses a solid-state image sensor such as a CMOS (complementary metal oxide semiconductor image sensor) or a CCD (charge coupled device), and an analog electric signal output from the solid-state image sensor as a digital value. The image sensor may include an analog-to-digital converter for conversion and output.

In the present embodiment, the lens unit 220 may be equipped with a predetermined lens barrel (not shown) and a lens (not shown). The lens may include a single lens or a plurality of lenses. The lens may comprise a liquid lens.

In an embodiment, an actuator (not shown) capable of driving the lens unit 220 may be provided on the housing 210. The actuator may be a voice coil motor, a micro actuator, a silicon actuator, a shape memory alloy (SAM), etc., and the actuator may be applied in various ways, such as an electrostatic method, a thermal method, a bimorph method, a static electricity method, a piezoelectric actuator, etc.

For example, according to one embodiment, the actuator may support the lens unit 220, and the actuator performs an auto-focus function by moving the lens up and down in response to a control signal from a predetermined control unit.

The lens module 200 may include a voice coil motor, a MEMS actuator, and a piezoelectric actuator that move the lens up and down, and other embodiments may include a liquid lens other than the lens without a separate actuator.

The voice coil motor moves the entire lens of the lens module up and down, the MEMS and the piezoelectric actuator move some lenses of the lens module up and down, and the liquid lens adjusts a focal length by changing a curvature of an interface between two liquids.

In an embodiment, the gyro sensor may use a two-axis gyro sensor that detects two rotational movement amounts of pitch and yaw representing a large movement in a two-dimensional image frame, and is used for more accurate camera shake correction. The gyro sensor may also use a three-axis gyro sensor that detects the amounts of movement of pitch, yaw, and roll. The motions corresponding to pitch, yaw, and roll detected by the gyro sensor can be converted into appropriate physical quantities according to the camera shake correction method and the correction direction.

Referring next to fig. 2a and 2b together, in an embodiment, the circuit board 350 may include any substrate having a wiring pattern that may be electrically connected, such as a rigid printed circuit board (rigid PCB), a flexible printed circuit board (flexible PCB), and a rigid-flexible printed circuit board (rigid-flexible PCB).

For example, referring to fig. 2b, circuit board 350 may include a first circuit board 351, a second circuit board 352, and a third circuit board 353. The first circuit board 351 may be a rigid printed circuit board (rigid PCB), and the second circuit board 352 may be a flexible printed circuit board (flexible PCB) or a rigid-flexible PCB. The third circuit board 353 may be a rigid circuit board, but is not limited thereto.

In this case, second circuit board 352 may be arranged in a curved shape in the form of a flexible circuit board.

The first circuit board 351 may be fixed to the second holder 320, and the third circuit board 353 may be electrically connected to the lens module 200, but is not limited thereto.

Referring to fig. 2a, in an embodiment, the second supporter 320 may include a plurality of second recesses 320R 2. For example, the second bracket 320 may have a second recess 320R2 on each of the four sides.

According to the present embodiment, components other than the circuit board may be provided in the region of the second recess 320R2, thereby improving the efficiency of space and achieving a more compact configuration.

In the present embodiment, the second circuit board 352 is disposed in the area of the second recess 320R2 of the second bracket 320 to have a unique effect of dispersing the tension caused by the second circuit board 352. In addition, since interference with the second carrier 320 can be prevented, mechanical and electrical reliability can be significantly improved.

For example, referring to fig. 2b, the second circuit board 352 may be separately disposed in the second recess 320R2 of the second bracket 320. By this, there will be a unique effect of dispersing the tension received by second circuit board 352, and thus there is a technical effect of being able to significantly improve mechanical and electrical reliability.

Further, in the present embodiment, since the second circuit board 352 is disposed in the second recess 320R2 of the second bracket 320, interference between the second circuit board 352 and the driver 240 can be prevented, so that electrical reliability can also be improved.

Next, fig. 4a is a cross-sectional perspective view along line a1-a1 'of the camera module 201 according to the embodiment shown in fig. 2a, and fig. 4B is a cross-sectional view along line a-a1' of the camera module 201 according to the embodiment shown in fig. 2a, and fig. 5 is a partial enlarged view of the first region B1 of the camera module according to the embodiment shown in fig. 4B.

According to an embodiment, the first bracket 310 may include a plurality of first recesses 310R 1. For example, the first bracket 310 may have a first recess 310R1 area on each of the four surfaces.

According to the present embodiment, the first bracket 310 can be accurately injected by having the first recess 310R1 area, and can contribute to miniaturization, so that the operation speed can be improved according to the reduction in weight. A raised portion may be formed in first recessed region 310R1 at a location corresponding to ball bearing 316.

In an embodiment, the second bracket 320 may further include a plurality of second recesses 320R 2. For example, the second bracket 320 may have a second recess 320R2 on each of the four sides.

Further, the first bracket 310 may include a plurality of ball receiving parts 312, and the ball bearings 316 are disposed in the ball receiving parts 312. For example, the first bracket 310 may have a ball receiving part 312 on each of four sides.

Next, referring to fig. 5, the upper and lower first widths W1 of the ball receiving part 312 of the first bracket 310 may be greater than the diameter D1 of the ball. For example, the first width W1 may be 1.1 to 1.5 times the size of the ball diameter D1. Therefore, a moving space of the lens module at the time of yaw and pitch driving can be secured. In an embodiment, the upper and lower first widths W1 of the ball receiving part 312 of the first bracket 310 may be 1.2 times the diameter of the ball D1, but is not limited thereto.

In the present embodiment, the ball diameter D1 may be about 0.4mm to 0.8mm, but is not limited thereto. In the present embodiment, the ball diameter D1 may be 0.6mm, but is not limited thereto.

Referring to fig. 5, in the present embodiment, the first supporter 310 includes a first rounded surface 310S having a curved side surface, and the second supporter 320 may include a second rounded surface (320S) having a curved surface corresponding to the first rounded surface 310S. The curvature of first rounded surface 310S may be the same as the curvature of second rounded surface 320S, but is not limited thereto.

Therefore, according to an embodiment, in the first and second cradles 310 and 320, the first and second rounded surfaces 310S and 320S, which are curved surfaces, respectively have the same curvature, so that when yaw, pitch, or roll is driven, the yaw, pitch, or roll may be driven without interference by maintaining a distance between each other.

In the present embodiment, the first bracket 310 and the second bracket 320 may be spaced apart by a predetermined distance by the ball bearing 316, and the embodiment may be spaced apart by 0.2 mm. Further, other embodiments may be spaced apart by 0.2mm to 0.5 mm.

The first rounded surface 310S may be disposed on an outer side end surface of the first supporter 310, and the second rounded surface 320S may be disposed on an inner side end surface of the second supporter 320.

According to the embodiment, the first and second cradles 310 and 320 are provided with the first and second rounded surfaces 310S and 320S, respectively, as curved surfaces, so that the driving unit 340 may smoothly perform the roll, yaw, or pitch driving of the lens module 200.

In the present embodiment, the upper end portion of the first supporter 310 is disposed lower than the upper end portion of the second supporter 320, so that the roll driving of the lens module 200 can be smoothly performed.

Further, in the present embodiment, the lower end portion of the first bracket 310 is disposed higher than the lower end portion of the second bracket 320, so that at least one of the roll, the yaw, and the pitch of the lens module 200 can be smoothly performed.

Referring also to fig. 5, in an embodiment, the lower end portion of the second bracket 320 may be provided with a stopper member 320B serving as a stopper for stopping the movement of the first bracket 310.

Further, referring to fig. 5, since the first bracket 310 has the region of the first recess 310R1, precise injection can be performed and miniaturization can be facilitated, and the operation speed can be improved according to weight reduction.

Next, fig. 6a is a cross-sectional view along line a2-a2' of the camera module according to the embodiment shown in fig. 2a, and fig. 6B is a partial enlarged view of a second region B2 of the camera module according to the embodiment shown in fig. 6 a. And fig. 6c is a partial enlarged view of a third region B3 of the camera module according to the embodiment illustrated in fig. 6 a.

In the present embodiment, the first bracket 310 may include a plurality of ball receiving parts 312, and the ball bearings 316 are disposed in the plurality of ball receiving parts 312. For example, the first bracket 310 may have a ball receiving part 312 on each of four sides.

In this case, in the present embodiment, the first bracket 310 may include a first rounded surface 310S having a curved side surface.

In an embodiment, the first rounded surface 310S of the first bracket 310 includes at least two first cell rounded surfaces 310SR1, 310SR2, 310SR3, 310SR4, and the two first cell rounded surfaces 310SR1, 310SR2, 310SR3, 310SR4 may be disposed opposite to each other around the lens module 200.

For example, the first bracket 310 includes first-first to fourth cell-rounded surfaces 310SR1, 310SR2, 310SR3, 310SR4, and the first-first cell-rounded surface 310SR1 and the first-second cell-rounded surface 310SR2 may be disposed opposite to each other around the lens module 200. In addition, the first-third cell-rounding surface 310SR3 and the first-fourth cell-rounding surface 310SR4 may be disposed opposite to each other around the lens module 200.

The first cell rounded surface may be referred to as a sloped jamb.

The first bracket 310 of the present embodiment may include a plurality of inclined side pillars and a vertical side pillar disposed between each inclined side pillar.

For example, the first bracket 310 may include first-first to fourth oblique side posts 310SR1, 310SR2, 310SR3, 310SR4 and first-first to first-fourth vertical side posts 310SVR1, 310SV2, 310SV3, and 310SV4 disposed between each of the oblique side posts on the sides of the four surfaces.

The first-first inclined side post 310SR1 and the first-second inclined side post 310SR2 may be arranged to be symmetrical to each other, and the first-third inclined side post 310SR3 and the first-fourth inclined side post 310SR4 may also be arranged to be symmetrical to each other.

In addition, in the present embodiment, the second supporter 320 may further include a second rounded surface 320S having a curved side surface.

In an embodiment, the second rounded surface 320S of the second bracket 320 includes at least two second cell rounded surfaces 320SR1, 320SR2, 320SR3, and 320SR4, and the two second cell rounded surfaces 320SR1, 320SR2, 320SR3, and 320SR4 may be disposed opposite to each other around the lens module 200.

For example, the second bracket 320 includes second-first to second-fourth cell-rounded surfaces 320SR1, 320SR2, 320SR3, and 320SR4, and the second-first cell-rounded surface 320SR1 to the second-second cell-rounded surface 320SR2 may be disposed opposite to each other around the lens module 200. In addition, the second-third cell-rounding surface 320SR3 to the second-fourth cell-rounding surface 320SR4 may be disposed opposite to each other around the lens module 200.

The second cell rounded surface may be referred to as a sloped jamb.

For example, the second rounded surface 320S of the second bracket 320 may include second-first to second-fourth oblique side pillars 320SR1, 320SR2, 320SR3, and 320SR4, and the second rounded surface 320S may include vertical side pillars 320SV1, 320SV2, 320SV3, and 320SV4 disposed between the oblique side pillars, respectively.

The second-first inclined side post 320SR1 and the second-second inclined side post 320SR2 may be arranged to be symmetrical to each other, and the second-third inclined side post 320SR3 and the second-fourth inclined side post 320SR4 may also be arranged to be symmetrical to each other.

In the present embodiment, the ball receiving part 312 may be disposed between the first rounded surface 310S of the first bracket 310 and the second rounded surface 320S of the second bracket 320.

For example, the ball receiving parts 312 may be disposed between the first-unit to first-fourth-unit rounded surfaces 310SR1, 310SR2, 310SR3, 310SR4 and the second-first-unit to second-fourth-unit rounded surfaces 320SR1, 320SR2, 320SR3, and 320SR4, respectively, corresponding to each other.

In the present embodiment, the first bracket 310 may include first-unit to first-fourth-unit rounded surfaces 310SR1, 310SR2, 310SR3, 310SR4, but the first bracket 310 may not include the vertical side pillars 310SV1, 310SV2, 310SV3, 310SV 4.

That is, in an embodiment, the first bracket 310 may have a structure in which the first-first to fourth cell rounded surfaces 310SR1, 310SR2, 310SR3, and 310SR4 are connected to each other.

When the first bracket 310 of the present embodiment does not include the vertical side pillars 310SV1, 310SV2, 310SV3, 310SV4, the housing and the first-first to fourth unit rounded surfaces 310SR1, 310SR2, 310SR3, 310SR4 of the lens module may be integrally formed, but are not limited thereto.

When yaw and pitch driving is described by referring to fig. 6a and 2b together, in the present embodiment, a yaw function may be performed when the first-first cell rounded surface 310SR1 is raised and the first-second cell rounded surface 310SR2 is lowered. Further, in the embodiment, the pitch function may be performed when the first-third unit rounded surfaces 310SR3 are raised and the first-fourth unit rounded surfaces 310SR4 are lowered, but the present invention is not limited thereto.

Next, fig. 6B is a partial enlarged view of a second region B2 of the camera module according to the embodiment illustrated in fig. 6 a.

In the present embodiment, the ball receiving part 312 provided in the first bracket 310 may have a V-shape. Further, the ball bearings 316 may integrally contact the first bracket 310 and the second bracket 320 at three points.

For example, in the present embodiment, the ball receiving part 312 provided on the first bracket 310 includes the first inclined surface 312S1, the second inclined surface 312S2, and the bottom surface 312B, so that the ball receiving part 312 may form a V-shaped track.

For example, in the present embodiment, the ball receiving part 312 of the first bracket 310 may have a V-shaped track formed in the z-axis direction. The ball bearing 316 may contact the first bracket 310 at two points and contact the second bracket 320 at one point, so that three-point contact may be formed.

Meanwhile, the horizontal cross section of the ball receiving part 312 may have a circular shape.

In an embodiment, the first-first unit rounded surface 310SR1 of the first bracket 310 may have a rounded protrusion 310SP in an opposite region corresponding to the ball receiving part 312. The first-second unit-rounding surface 310SR2, the first-third unit-rounding surface 310SR3, and the first-fourth unit-rounding surface 310SR4 may also have rounding protrusions 310SP in opposite regions corresponding to the ball receiving part 312.

According to the embodiment, the first-first unit rounded surface 310SR1, the first-second unit rounded surface 310SR2, the first-third unit rounded surface 310SR3, the first-fourth unit rounded surface 310SR4 may have the rounded protrusion 310SP protruding into the first recess region 310R1 in the opposite region corresponding to the ball receiving part 312, so that the present embodiment may provide a space for forming the ball receiving part 312, and the ball receiving part 312 forms a solid structure to form the ball bearing, thereby enabling to improve the reliability of the rolling drive of the ball bearing 316.

Next, fig. 6c is a partial enlarged view of a third area B3 of the camera module according to the embodiment illustrated in fig. 6 a.

In an embodiment, the first bracket 310 may include a first-second recess 310R2 between the first-first cell rounded surface 310SR1 and the first-first vertical column 310SV 1.

Further, in an embodiment, the second bracket 320 may include a second-first boss 320SP1 between the second-first cell rounded surface 320SR1 and the second-first vertical column 320SV 1.

The second-first protrusion 320SP1 may allow the first bracket 310 to be disposed in the first-second recess 310R2, so that yaw, pitch, or roll driving may be smoothly performed.

Further, the second-first protrusion 320SP1 may serve as a stopper when the first bracket 310 rolls.

Next, fig. 7 is a perspective view of the first bracket 310 and the driving unit 340 in the camera module according to the embodiment shown in fig. 2a, and fig. 8a and 8b are exemplary views of driving the camera module according to the embodiment.

In the present embodiment, the driving unit 340 may include a first driving unit 341 and a second driving unit 342.

The driving unit 340 may be coupled to the lens module, but is not limited thereto.

Referring to fig. 7, the first driving unit 341 may include a first magnet 341m and a first coil unit 341c to induce a force F1 in a first direction. For example, the first driving unit 341 may include a first magnet 341m and a ring-shaped first coil unit 341c to induce the first force F1 in the z-axis direction.

For example, the first magnet 341m is a magnet provided with an n pole and an s pole in the vertical direction, and the first magnet 341m may induce an electromagnetic force in the vertical direction.

The second driving unit 342 may include a second magnet 342m and a second coil unit 342c to induce a force F2 in a second direction. For example, the second magnet 342m may be seated such that the n-pole or s-pole horizontally faces the second coil unit 342c to induce the force F2 in the horizontal direction (Y-axis direction).

For example, the second driving unit 342 may include a second magnet 342m and a ring-shaped second coil unit 342c to induce the second force F2 in the y-axis direction.

Further, in the present embodiment, the first yoke 344 may be disposed between the driving unit 340 and the first bracket 310, and the first yoke 344 serves as a back yoke, so that magnetic flux is uniform and external leakage of magnetic flux may be prevented.

In the present embodiment, a second yoke (not shown) made of iron may be further provided between the second magnet 342m and the second coil part 342 c. For example, a magnetic member such as a second yoke may be inserted and disposed inside the second coil unit 342 c. By this, a second yoke may be provided at the center of the second coil part 342c, and the solenoid may be implemented by the yoke and the second coil part 342 c. By implementing a solenoid, it will be possible to generate a force that pushes or pulls the magnet.

According to fig. 7, the first coil 341c and the second coil 342c are attached to the first bracket 310, and the first magnet 341m and the second magnet 342m are separated from the coils. It is also possible to have a structure in which the first and second magnets 341m and 342m are attached to the first bracket 310 and the coil is separated from the magnets.

By this, as shown in fig. 8a and 8b, the roll driving or the yaw/pitch tilt driving may be possible.

For example, referring to fig. 8a, a scroll drive may be possible according to an embodiment.

Referring briefly to fig. 6c, in the present embodiment, the second-first protrusion 320SP1 may allow the first bracket 310 to be disposed in the first-second recess 310R2, so that rolling driving may be smoothly performed.

Further, in the second-first boss 320SP1, the first bracket 310 may function as a rolling drive stopper.

Further, referring to fig. 8b, according to an embodiment, it is possible to drive yaw/pitch tilt.

Referring briefly to fig. 5, in an embodiment, first support 310 includes a first rounded surface 310S having curved side surfaces. And the second holder 320 is attached to the first rounded surface 310S, and the second holder 320 may include a second rounded surface 320S having a corresponding curved surface. The curvature of first rounded surface 310S may be the same as the curvature of second rounded surface 320S, but is not limited thereto.

Therefore, according to an embodiment, in the first and second cradles 310 and 320, the first and second rounded surfaces 310S and 320S, which are curved surfaces, respectively have the same curvature, so that when yaw, pitch, or roll is driven, yaw, pitch, or roll may be driven without interference by maintaining a distance from each other.

The first rounded surface 310S may be disposed on an outer side end surface of the first supporter 310, and the second rounded surface 320S may be disposed on an inner side end surface of the second supporter 320.

According to an embodiment, the first and second cradles 310 and 320 are provided with the first and second rounded surfaces 310S and 320S, respectively, as curved surfaces, so that the driving unit 340 may provide the lens module 200 with smooth driving for rolling, yawing, or pitching.

In the present embodiment, the upper end portion of the first supporter 310 is disposed lower than the upper end portion of the second supporter 320, so that the roll driving of the lens module 200 can be smoothly performed.

Further, in the present embodiment, the lower end of the first bracket 310 is disposed higher than the lower end of the second bracket 320, so that at least one of the roll, the yaw, and the pitch of the lens module 200 can be smoothly performed.

Further, referring to fig. 5, in an embodiment, the lower end portion of the second bracket 320 may be provided with a stopper member 320B serving as a stopper for stopping the movement of the first bracket 310.

According to an embodiment, a rotation angle of about 0.8 to 2.0 degrees (including a rotation angle of 1 degree) may be secured by the roll driving or the yaw/pitch tilt driving, thereby performing an effective OIS function.

The present embodiment can provide a camera module capable of providing an excellent OIS function without distorting image quality even when a video is taken, and an actuator for the camera module.

In addition, the present embodiment has a technical effect of being able to provide the above technical effect while also providing a micro camera module.

The features, structures, effects, and the like described in the above embodiments are included in at least one embodiment, and are not necessarily limited to only one embodiment. Further, the features, structures, effects, and the like illustrated in each embodiment may be combined or modified for other embodiments by a person having ordinary knowledge in the art to which the embodiment pertains. Therefore, the contents relating to such combination and modification should be understood to be included in the scope of the embodiments.

Although the embodiments have been described above, these are only examples and are not intended to limit the embodiments, and those of ordinary skill in the art to which the embodiments pertain do not depart from the essential features of the embodiments. It can be seen that branching transformation and application are possible. For example, each component specifically illustrated in the embodiments may be modified and implemented. Differences associated with these modifications and applications should be construed as being included in the scope of the embodiments as set forth in the appended claims.

Industrial applicability

The camera module of the present embodiment may include a separate AF driver such as VCM, MEMS, piezoelectric, liquid lens, or the like.

In this embodiment mode, the image sensor substrate may be formed integrally with the circuit board or may be formed separately from the circuit board.

In addition, the camera module of the present embodiment includes a gyro sensor (not shown) provided on a circuit board to detect a motion, a module driver for driving the camera module according to an input/output signal from the gyro sensor, and a drive circuit for controlling the module driver including an element (not shown).

In the camera module of the present embodiment, the lens module may include a voice coil motor, a MEMS actuator, and a piezoelectric actuator that move the lens up and down, and other embodiments may include a liquid lens other than the lens without a separate actuator.