KR20200139484A - Camera Actuator and Camera module including the same - Google Patents

Abstract

An embodiment relates to a camera driving device and to a camera module including the same. According to an embodiment, the camera driving device comprises: a rotor which includes a first round surface at an outer edge and is moved by having a first receiving portion; a base which includes a second round surface corresponding to the first round surface at an inner edge, and has the rotor spaced apart from the second receiving portion; a ball disposed between the first round surface of the rotor and the second round surface of the base; and a first driving portion disposed on the rotor and a second driving portion disposed on the base. A direction of the first round surface or a direction of the second round surface may be a direction opposite to a direction of an optical axis.

Description

Camera drive device and camera module including the same {Camera Actuator and Camera module including the same}

The embodiment relates to a camera driving device and a camera module including the same.

The camera module performs a function of photographing a subject and storing it as an image or video, and is mounted on mobile terminals such as mobile phones, laptops, drones, and vehicles.

On the other hand, portable devices such as smartphones, tablet PCs, and laptops have micro-camera modules built-in, and these camera modules automatically adjust the distance between the image sensor and the lens to align the focal length of the lens with an autofocus function. Can be done.

For example, a recent camera module can perform a zooming function of zooming up or zooming out by increasing or decreasing the magnification of a distant subject through a zoom lens. I can.

In addition, recently, camera modules employ Image Stabilization (IS) technology to correct or prevent image shake due to camera movement caused by unstable fixing devices or user movements. These IS technologies include Optical Image Stabilizer (OIS) technology and anti-shake technology using an image sensor.

OIS technology is a technology that corrects motion by changing the path of light, and an anti-shake technology using an image sensor is a technology that corrects movement in a mechanical and electronic manner.

On the other hand, the image sensor has a higher resolution as it goes to a higher pixel, so that the size of the pixel decreases. However, as the pixel becomes smaller, the amount of light received at the same time decreases. Therefore, in a dark environment, the higher the pixel camera, the more severe the blurring of the image due to hand shake appears as the shutter speed becomes slower.

Accordingly, in order to capture an image without distortion using a high-pixel camera during dark night shooting or video shooting, the OIS function has recently been essentially adopted.

On the other hand, OIS technology corrects the image quality by correcting the optical path by moving the lens or image sensor of the camera.In particular, the OIS technology detects the movement of the camera through a gyro sensor and I calculate the distance the image sensor needs to move.

For example, the OIS correction method includes a lens shift method and a lens tilt method.

Meanwhile, video shooting using a mobile phone camera has recently been widely used. For example, Internet personal broadcasting through real-time video recording such as Africa TV (Afreeca TV: www.afreecatv.com) is gaining popularity.

However, when the OIS function is operated during video recording, the distortion of the video is rather severe, resulting in a serious problem that causes the user or viewer to roar.

For example, FIG. 1A is a conceptual diagram of an OIS through a lens shift method in a conventional camera module, and FIG. 1B is a conceptual diagram of an OIS through a lens tilt method in a conventional camera module.

Referring to FIG. 1A, in the case of the conventional lens shift method, according to the movement of the lens Ls, the optical axis Z, which is the reference of the point where the spatial resolution value is highest in the image sensor IS, is Z1 to Z2. As a result of the repeated movement from Z2 to Z1, the distortion of the video is severe, and the situation is causing rumbling to users.

In addition, the problem of video distortion in the lens shift method also occurs in the sensor shift method.

Next, referring to FIG. 1B, in the case of the conventional lens tilt method, as the optical axis Z is repeatedly twisted from Z1 to Z2 according to the tilt of the lens Ls, the lens Ls and the image sensor ( IS) changes, and as the optical axis (Z), which is the reference of the spatial resolution value, moves repeatedly from Z1 to Z2 and from Z2 to Z1, the distortion of the video is more severe.

The problem of video distortion in the lens tilt method is similarly problematic in the sensor tilt method.

However, there is no suitable technical solution to the problem mentioned above.

Meanwhile, the OIS technology of the prior art requires a mechanical driving device for lens movement, sensor movement, etc., so the structure is complex and there is a limitation in implementing a micro camera module.

The embodiment is to provide a camera module driving device including the same and a camera module driving device capable of providing an excellent OIS function without image distortion even when a video is captured.

In addition, the embodiment is to provide an excellent OIS function without distortion of an image and to provide a miniature camera module.

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

The camera driving apparatus according to the embodiment includes a first round surface at an outer edge, a rotor that is moved with a first receiving portion, and a second round surface corresponding to the first round surface at an inner corner, 2 A base in which the rotor is spaced apart from the receiving part, a ball disposed between the first round surface of the rotor and the second round surface of the base, a first driving part disposed in the rotor and disposed in the base It may include a second driving unit.

A direction of the first round surface or a direction of the second round surface may be a direction alternately with a direction of an optical axis.

An area of the second round surface may be different from an area of the first round surface.

An area of the second round surface may be larger than an area of the first round surface.

The embodiment further includes a lens unit coupled to the first inner receiving unit of the rotor, and the rotor may be moved integrally with the lens unit by the first driving unit and the second driving unit.

The lens unit is rotated along the first round surface and the second round surface with respect to the optical axis, and the lens unit is tilted vertically and horizontally with respect to the optical axis along the first round surface and the second round surface. Can be moved.

The rotor may include a ball receiving portion in which the ball is disposed.

The embodiment may further include an upper spring disposed in contact with the base and the upper side of the rotor.

The embodiment further includes a circuit board disposed under the base and controlling the driving unit, the circuit board including a rigid circuit board and a flexible circuit board, and a part of the flexible circuit board is disposed under the rotor Can be.

The embodiment further includes an upper spring disposed on the rotor and the base, and the upper spring may include an outer support part, a spring part connected to the inner side of the outer support part, and an inner support part connected inward to the spring part. .

The outer support part may be fixed to the base, and the inner support part may be fixed to the rotor.

The camera module according to the embodiment may include any one of the above camera driving devices.

According to the driving device of the camera module and the camera module including the same according to the embodiment, there is a technical effect of providing an excellent OIS function without distortion of an image even when a video is captured.

In addition, the embodiment is a method of moving the entire module including the lens and the image sensor, and the correction range is wider than that of the lens moving method, and since the optical axis of the lens and the axis of the image sensor are not twisted, distortion of the image is minimized. There is a unique technical effect without (distortion).

In addition, the embodiment has a technical effect of providing an excellent OIS function without image distortion, and a technical effect of providing a micro camera module at the same time.

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

1A is a conceptual diagram of OIS through a lens shift method in a conventional camera module.
1B is a conceptual diagram of OIS through a lens tilt method in a conventional camera module.
2A is a plan view showing the camera module of the embodiment.
2B is an exploded perspective view of the camera module of the embodiment shown in FIG. 1.
3A is a perspective view of an actuator in the camera module of the embodiment shown in FIG. 2B.
3B is an exploded perspective view of an actuator in the camera module of the embodiment shown in FIG. 3A.
3C is a detailed view of an upper spring in the camera module of the embodiment shown in FIG. 3A.
4 is a perspective view of a rotor and a first driving unit in the actuator shown in FIG. 3B.
5 is a perspective view of a base and a second driving unit in the actuator shown in FIG. 3B.
6 is an exemplary view of the operation of the base 320 in the actuator shown in FIG. 3B.
7A is a perspective view of a lens unit and a sensor unit in the camera module of the embodiment shown in FIG. 2B.
Figure 7b is an exploded perspective view of Figure 6a.
8 is an enlarged view of the substrate portion shown in FIG. 7B.
9 is a cross-sectional view taken along line A1-A1' of the camera module according to the embodiment shown in FIG. 2A.
10 is a cross-sectional perspective view taken along line A2-A2' of the camera module according to the embodiment shown in FIG. 2A.
11A is a diagram illustrating a first operation of the camera module according to the embodiment illustrated in FIG. 10.
11B is a diagram illustrating a second operation of the camera module according to the embodiment illustrated in FIG. 10.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Since the embodiments can be modified in various ways and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the embodiments to a specific form of disclosure, and it should be understood that all changes, equivalents, and substitutes included in the spirit and scope of the embodiments are included.

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

In the description of the embodiment, in the case of being described as being formed on the "top (top)" or "bottom (on or under)" of each element, the top (top) or bottom (bottom) (on or under) ) Includes both elements in which two elements are in direct contact with each other or in which one or more other elements are indirectly formed between the two elements. In addition, when expressed as “up (up)” or “on or under”, the meaning of not only an upward direction but also a downward direction based on one element may be included.

In addition, relational terms such as "top/top/top" and "bottom/bottom/bottom" used below do not necessarily require or imply any physical or logical relationship or order between such entities or elements, It may be used to distinguish one entity or element from another entity or element.

(Example)

2A is a plan view showing the camera module 1000 of the embodiment, and FIG. 2B is an exploded perspective view of the camera module 1000 of the embodiment shown in FIG. 1.

Referring to FIGS. 2A and 2B, the camera module 1000 of the embodiment may include any one or more of a sensor unit 100, a lens unit 200, an actuator 300, and a cover 400.

Referring to FIG. 2B, in an embodiment, a direction parallel to the optical axis of light may be referred to as a z-axis, a plane perpendicular to the optical axis may be referred to as an xy plane, and in the xy plane, the x-axis and the y-axis are mutually perpendicular. It may be defined, 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 largely include a linear movement that moves along an axis and a rotational movement that rotates about the axis.

As shown in FIG. 2B, the linear movement is a movement in the horizontal coordinate axis (x-axis) direction of the camera module, a movement in the vertical coordinate axis (y-axis) direction of the camera module, and an optical axis (z) arranged in the front and rear direction of the camera module. It may include movement in the axial) direction.

Next, as shown in FIG. 2B, the rotational movement is a pitch, which means a vertical rotational movement with the horizontal coordinate axis (x-axis) of the camera module as the rotational axis, and the vertical coordinate axis (y-axis) of the camera module. As a result, a yaw, which means a left-right rotational movement, and a roll, meaning a rotational movement of an optical axis (z-axis) passing in the front and rear direction of the camera module as a rotational axis, may be included. The 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, the bottom and the rear of the mobile phone.

Referring to FIG. 2B, in an embodiment, the lens unit 200 and the actuator 300 may be disposed within the cover 400. The cover 400 may be referred to as a cover housing or a shield can. The cover 400 may be formed of a metal material such as steel (SUS), and may shield electromagnetic waves flowing into and out of the camera module, and also prevent foreign matters from entering the camera module.

Next, FIG. 3A is a perspective view of the actuator 300 in the camera module of the embodiment shown in FIG. 2B, and FIG. 3B is an exploded perspective view of the actuator 300 in the camera module of the embodiment shown in FIG. 3A.

3A and 3B, in the camera module of the embodiment, the actuator 300 includes a rotor 310, a base 320 on which the rotor 310 is disposed, and between the rotor 310 and the base 320. It may include a ball 316 disposed on, a first driving unit 311M disposed on the rotor 310 and a second driving unit 322C disposed on the base 320.

In addition, in the camera module of the embodiment, the actuator 300 may include an upper spring 350 disposed in contact with the base and the upper side of the rotor.

For example, FIG. 3C is a detailed view of the upper spring 350 in the camera module of the embodiment shown in FIG. 3A, and FIG. 4 is a view of the rotor 310 and the first driving part 311M in the actuator shown in FIG. 3B. It is a perspective view, and FIG. 5 is a perspective view of the base 320 and the second driving part 322C in the actuator shown in FIG. 3B.

First, the upper spring 350 will be described with reference to FIGS. 3C and 3A.

The rotor 310 and the base 320 may be connected by the upper spring 350, and the initial position of the lens unit 200 may be set through the preload of the upper spring 350.

The upper spring 350 may include an outer support part 351, a spring part 352, and an inner support part 353.

For example, the upper spring 350 includes an outer support portion 351, a spring portion 352 connected to the inner side of the outer support portion 351, and an inner support portion 353 connected inward to the spring portion 352. can do.

The outer support part 351 may be fixed to the base 320, and the inner support part 353 may be fixed to the rotor 310.

Meanwhile, in another embodiment, an initial position of the lens unit 200 may be set between the rotor 310 and the base 320 by a predetermined magnetic force.

In addition, in the embodiment, an open loop driving method may be performed using the upper spring 350.

Next, FIG. 4 is a perspective view of the rotor 310 and the first driving part 311M in the actuator shown in FIG. 3B, and FIG. 5 is a perspective view of the base 320 and the second driving part 322C in the actuator shown in FIG. 3B. to be.

The camera driving apparatus of the embodiment includes a rotor 310 supporting and driving the lens unit 200, a base 320 accommodating the rotor 310, and a first driving unit 311M driving the rotor 310 , It may include a second driving unit (322C).

The camera driving device may allow the lens unit 200 coupled to the rotor 310 to move in pitch, yaw, and roll based on the x, y, and z axes.

For example, the rotor 310 supports the configuration of the lens unit 200 and the first driving unit 311M, for example, a magnet, and operates Pitch, Yaw, and Roll together with the AF function of the lens unit 200 Can be done.

The base 320 accommodates the rotor 310 and may be a fixing part for performing pitch, yaw, and roll operations of the lens unit 200 through the rotor 310.

Specifically, referring to FIG. 4, in an embodiment, the rotor 310 may have a first accommodating portion therein, and a lens unit 200 may be disposed in the first accommodating portion.

A ball receiving portion 315 may be provided at an outer edge of the first bracket 311 of the rotor 310, and a ball 316 may be disposed in the ball receiving portion 315.

For example, first protrusions 314P may be formed at four outer corners of the first bracket 311, and each of the ball receiving portions 315 may be secured by the first protrusions 314P, A total of four balls 316 may be disposed at each of the four outer corners, but the present invention is not limited thereto.

In addition, in the embodiment, the first protrusions 314P at the four outer corners of the first bracket 311 function as a stopper or a shake fixing unit in the direction of the corners of the base 320 when the rotor 310 is driven. There is a technical effect that can be.

For example, in the embodiment, the first protrusion 314P of the first bracket 311 may function as a stopper function or a shake fixing part in the direction of the edge of the base 320 when the rotor 310 is driven by yaw or pitch. There are special technical effects.

Referring to FIG. 9 for a moment, in the embodiment, the rotor 310 includes a ball receiving portion 315 at its outer edge, and a cross section of the ball receiving portion 315 may include a first round surface 310R. have.

Referring to FIG. 4 again, a first coupling protrusion 313 may be formed on the upper side of the first bracket 311, and the first coupling protrusion 313 is an inner support portion 353 of the upper spring 350. ) Can be fixed.

Next, the first bracket 311 may have a first recess 312R outside the sidewall. In addition, the embodiment may include a first driving unit 311M disposed on the rotor 310.

For example, the first bracket 311 may have a first recess 312R outside of the sidewall, and a first driving part 311M may be disposed in the first recess 312R. The first driving unit 311M may be a magnet driving unit such as a permanent magnet, but is not limited thereto.

The first driving unit 311M may be a magnet driving unit, and may be disposed outside the four side surfaces of the first bracket 311.

One pair of the first driving units 311M facing each other may be a pitch magnet, and the other pair of facing each other may be a yaw magnet, but the present invention is not limited thereto.

Next, referring to FIG. 5, in an embodiment, the base 320 includes a second round surface 310R corresponding to the first round surface 310R at an inner edge, and a first round surface 310R of the rotor. The ball 316 may be disposed between the and the second round surface 324R of the base.

The base 320 accommodates the rotor 310 and may be a fixing part for performing pitch, yaw, and roll operations of the lens unit 200 through the rotor 310.

To this end, the embodiment may include a second driving unit 322C disposed on the base 320. The second driving unit 322C may be a coil driving unit.

For example, the second driving part 322C may include a second bracket 321, a through hole 322H penetrating through a sidewall of the first bracket 321, and the through hole 322H The second driving unit 322C may be disposed in the.

One pair of the second driving units 322C facing each other may be a pitch coil, and the other pair of facing each other may be a yaw coil, but the present invention is not limited thereto.

In addition, in the embodiment, the base 320 may be precisely injected by having the second recess 323R at the outer edge of the corner, contributing to miniaturization, and an operation speed may be improved according to weight reduction.

Next, FIG. 6 is an exemplary view of the operation of the base 320 in the actuator shown in FIG. 3B.

The second round surface 324R of the base 320 of the embodiment may allow the ball 316 to roll in the first direction DR1 and the second direction DR2.

For example, the lens unit 200 is rotated along the first round surface 310R and the second round surface 324R with respect to the optical axis, and the lens unit 200 is the first round surface Along the surface 310R and the second round surface 324R, the optical axis may be tilted up, down, left and right.

The embodiment is a tilting method of the entire module including the lens and the image sensor, and the correction range is wider than that of the lens movement method, and since the optical axis of the lens and the axis of the image sensor are not twisted, the distortion of the image is minimized. There is a unique technical effect without distortion).

Accordingly, according to the driving apparatus of the camera module and the camera module including the same according to the embodiment, there is a technical effect of providing an excellent OIS function without distortion of an image even when a video is captured.

Although the conventional internal technology implements rotational driving of the lens, such internal technology remains at a level that enables rotational driving in one direction such as a direction parallel or perpendicular to the Z-axis, which is an optical axis.

On the other hand, in the camera driving apparatus according to the embodiment, there is a technical effect capable of rotating in a plurality of directions.

For example, the lens unit 200 is rotated along the first round surface 310R and the second round surface 324R with respect to the optical axis, and the lens unit 200 is the first round surface Along the surface 310R and the second round surface 324R, the optical axis may be tilted up, down, left and right.

That is, as shown in FIG. 6, the second round surface 324R of the base 320 may be formed to be wider than the first round surface 310R of the rotor 310.

In addition, the second round surface 324R of the base 320 and the first round surface 310R of the rotor 310 are disposed in an oblique direction so that the round surface direction is offset from the Z axis, so that the rotor 310 is There is a special technical effect of being able to rotate in the direction.

Next, FIG. 7A is a perspective view of the lens unit 200 and the sensor unit 100 in the camera module of the embodiment shown in FIG. 2B, and FIG. 7B is an exploded perspective view of FIG. 6A.

Referring to FIG. 7B, in an embodiment, the sensor unit 100 may include a substrate unit 110, an image sensor 120, and a stiffener 130.

For example, in the embodiment, the sensor unit 100 includes a substrate unit 110, an image sensor 120 disposed on the substrate unit 110 so as to overlap with the lens unit 200, and the substrate unit 110 It may include a stiffener 130 disposed on the lower side.

The image sensor 120 is an analog-to-digital conversion for converting and outputting a solid-state image sensor such as a Complementary Metal Oxide Semiconductor Image Sensor (CMOS) or a Charge Coupled Device (CCD), and an analog electrical signal output from the solid-state image sensor into a digital value. May contain wealth.

The stiffener 130 may function as a reinforcing material that is disposed under the substrate portion 110 to increase strength and rigidity of the substrate portion 110.

Next, FIG. 8 is an enlarged view of the substrate unit 110 shown in FIG. 7B.

In the embodiment, the substrate unit 110 includes all substrates having wiring patterns that can 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). Can include.

For example, in the embodiment, the substrate unit 110 may include a first circuit board 111, a second circuit board 112, and a third circuit board 113.

For example, the substrate unit 110 includes a first circuit board 111 on which the actuator 300 is disposed, a first circuit board 111 extending in one direction from the first circuit board 111 and on which a control semiconductor chip (not shown) is disposed. The second circuit board 112 may include a third circuit board 113 extending from the second circuit board 112 to one side and electrically connected to a predetermined main circuit board (not shown).

The first circuit board 111 may include a 1-1 circuit board 111a, a 1-2 circuit board 111b, and a 1-3rd circuit board 111c.

For example, the first circuit board 111 is disposed on the outer periphery and extends from the second circuit board 112 and the 1-1 circuit board 111a and the 1-1 circuit board 111a The 1-2 circuit board 111b extending inward and having elasticity and the 1-3rd circuit board 111c connected to and disposed inside the 1-2 circuit board 111b and on which the image sensor 120 is disposed ) Can be included.

For example, referring to FIG. 8, the 1-1 circuit board 111a may be a rigid PCB, and the 1-2 circuit board 111b is a flexible printed circuit board. ) Or a rigid flexible PCB, and the 1-3rd circuit board 111c may be a rigid circuit board, but is not limited thereto.

In this case, the 1-2nd circuit board 111b may be arranged in a curved shape in the form of a flexible circuit board.

The first-first circuit board 111a may be fixed to the base 320, and the first-third circuit board 111c may be electrically connected to the image sensor 120, but is not limited thereto.

In addition, the embodiment includes a gyro sensor (not shown) disposed on the substrate unit 110 to detect motion, and a driving circuit device (not shown) that drives the actuator 300 according to input/output signals from the gyro sensor. can do.

In an embodiment, the gyro sensor may employ a two-axis gyro sensor that detects two rotational motion amounts of pitch and yaw representing a large motion in a two-dimensional image frame, and for more accurate camera shake correction. It is also possible to employ a 3-axis gyro sensor that detects the amount of movement of the pitch, yaw and roll. Movements corresponding to the pitch, yaw, and roll detected by the gyro sensor may be converted into an appropriate physical quantity according to a camera shake correction method and a correction direction.

Next, FIG. 9 is a cross-sectional view taken along line A1-A1' of the camera module according to the embodiment shown in FIG. 2A.

Referring to FIGS. 9, 4, and 5 together, the camera module according to the embodiment includes a first round surface 310R at an outer edge, a rotor 310 moving with a first receiving portion, and an inner edge. A base 320 including a second round surface 324R corresponding to the first round surface 310R, and in which the rotor 310 is spaced apart from the second receiving part, and the rotor 310 The ball 316 disposed between the first round surface 310R and the second round surface 324R of the base 320, a first driving unit 311M disposed on the rotor 310, and the base ( A second driving unit 322C disposed on 320 may be included.

According to the embodiment, the posture can be controlled by using the cloud of the ball 316, and the role of preventing tremors acting on the upper spring 350 can also be performed.

In addition, according to the embodiment, the driving force may be improved by disposing the first driving unit 311M as a magnet driving unit and the second driving unit 322C as a coil driving unit to face each other.

In the embodiment, the lens unit 200 may include a predetermined barrel 220 and a lens 210. The lens 210 may include a single lens or a plurality of lenses. For example, the lens 210 may include a first lens 211, a second lens 212, and a third lens 213. The lens 210 may include a liquid lens. For example, the first lens 211 and the third lens 213 may be solid lenses, and the second lens 212 may be a liquid lens, but are not limited thereto. For example, in the second lens 212, a lens liquid is disposed between predetermined frames, and a curvature of the lens liquid may be controlled by a predetermined electrode, but the present invention is not limited thereto.

In an embodiment, a lens actuator (not shown) capable of driving the lens unit 200 may be disposed. The lens actuator may be a voice coil motor, a micro actuator, a silicon actuator, a shape memory alloy (SAM), etc., and may be applied in various ways, such as an electrostatic method, a thermal method, a bimorph method, an electrostatic force method piezo actuator, etc. It is not.

For example, according to an embodiment, the lens actuator may support the lens unit 200 and perform an auto-focusing function by moving the lens up and down in response to a control signal from a predetermined control unit.

The lens unit 200 may include a voice coil motor, a MEMS actuator, and a piezo actuator to move the lens vertically, and other embodiments may include a liquid lens in addition to the lens without a separate actuator.

The voice coil motor moves the entire lens of the lens module up and down, the MEMS and piezo actuators move some lenses of the lens module up and down, and the liquid lens adjusts the focus by changing the curvature of the interface between the two liquids. can do.

According to an embodiment, the OIS may be implemented by a module tilt due to the rotor 310, the first driving unit 311M, and the second driving unit 322C, and the AF may be implemented using a variable lens.

For example, the variable lens may be a variable focus lens. Also, the variable lens may be a lens whose focus is adjusted. The variable lens may be at least one of a liquid lens, a polymer lens, a liquid crystal lens, a VCM type, and an SMA type.

The liquid lens may include a liquid lens including one liquid and a liquid lens including two liquids. A liquid lens containing one liquid may change the focus by adjusting a membrane disposed at a position corresponding to the liquid, and for example, the focus may be changed by pressing the membrane by electromagnetic force of a magnet and a coil.

A liquid lens including two liquids may control an interface formed between the conductive liquid and the non-conductive liquid by using a voltage applied to the liquid lens including a conductive liquid and a non-conductive liquid.

The polymer lens can change the focus of the polymer material through a driving unit such as piezo. The liquid crystal lens can change the focus by controlling the liquid crystal by electromagnetic force. The VCM type can change the focus by adjusting the solid lens or the lens assembly including the solid lens through the electromagnetic force between the magnet and the coil. The SMA type can change focus by controlling a solid lens or a lens assembly including a solid lens using a shape memory alloy.

9, in an embodiment, the direction of the first round surface 310R of the rotor 310 or the direction of the second round surface 324R of the base 320 is the direction of the optical axis Z. It can be a crossing direction.

For example, in an embodiment, a direction of the first round surface 310R of the rotor 310 may be a direction that is staggered so as not to be parallel to the direction of the optical axis Z. For example, the direction of the first round surface 310R of the rotor 310 may be oblique to the optical axis Z.

In addition, a direction of the second round surface 324R of the base 320 may be a direction that is staggered so as not to be parallel to the direction of the optical axis Z. For example, a direction of the second round surface 324R of the base 320 may be a direction oblique to the optical axis Z.

The lens unit 200 is rotated along the first round surface 310R and the second round surface 324R with respect to the optical axis, and the lens unit 200 is the first round surface 310R. And, along the second round surface 324R, the optical axis may be tilted vertically and horizontally.

The embodiment is a method of moving the entire module including the lens and the image sensor, and the correction range is wider than that of the lens moving method, and since the optical axis of the lens and the axis of the image sensor are not twisted, the distortion of the image is minimized. There is a unique technical effect without distortion).

Accordingly, according to the driving apparatus of the camera module and the camera module including the same according to the embodiment, there is a technical effect of providing an excellent OIS function without distortion of an image even when a video is captured.

While the conventional internal technology enables rotation in one direction such as a direction parallel to or perpendicular to the Z-axis, which is an optical axis, the camera driving apparatus according to the embodiment has a technical effect capable of rotating in a plurality of directions.

For example, the lens unit 200 is rotated along the first round surface 310R and the second round surface 324R with respect to the optical axis, and the lens unit 200 is the first round surface Along the surface 310R and the second round surface 324R, the optical axis may be tilted up, down, left and right.

In addition, the second round surface 324R of the base 320 and the first round surface 310R of the rotor 310 are disposed in an oblique direction so that the round surface direction is offset from the Z axis, so that the rotor 310 is There is a special technical effect of being able to rotate in the direction.

9 and 6, in the embodiment, the lens unit 200 is rotated along the first round surface 310R and the second round surface 324R with respect to the optical axis, and the lens unit 200 may be tilted vertically and horizontally with respect to the optical axis Z along the first round surface 310R and the second round surface 324R.

Next, FIG. 10 is a cross-sectional perspective view of the camera module according to the embodiment shown in FIG. 2A along line A2-A2' and a tilting angle of 0°.

Through this, as shown in FIGS. 11A and 11B, the entire module including the lens and the image sensor is moved, and the correction range is wider than that of the lens movement method, and the optical axis of the lens and the axis of the image sensor are not twisted. There is a unique technical effect without distortion of the image by minimizing the distortion of the image.

According to the embodiment, a rotation angle of about ±0.8° to ±2.0° can be secured by driving the entire module including the lens and the image sensor in a moving manner, and thus, an effective OIS function can be performed.

For example, FIG. 11A is a diagram illustrating a first operation of the camera module according to the exemplary embodiment illustrated in FIG. 10, and a tilting angle is ±1°.

In addition, FIG. 11B is a second exemplary operation of the camera module according to the embodiment illustrated in FIG. 10, and a tilting angle is ±2°.

Normally, the rotation angle required for viewing videos while walking is ±1°.According to the embodiment, the entire module including the lens and the image sensor can be moved to a state of ±2°, so the correction range compared to the lens moving method Is wider, and the optical axis of the lens and the axis of the image sensor are not twisted even when a video is taken while running, so there is a unique technical effect without distortion of the image by minimizing the deformation of the image.

In addition, the embodiment has a technical effect of providing an excellent OIS function without image distortion, and a technical effect of providing a micro camera module at the same time.

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

Features, structures, effects, and the like described in the embodiments above are included in at least one embodiment, and are not necessarily limited to only one embodiment. Further, the features, structures, effects, etc. illustrated in each embodiment may be implemented by combining or modifying other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be interpreted as being 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 field to which the embodiments belong are not departing from the essential characteristics of the embodiments. It will be seen that branch transformation and application are possible. For example, each component specifically shown in the embodiment can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the embodiments set in the appended claims.

Claims (11)

A rotor including a first round surface at an outer edge and moving with a first receiving portion;
A base including a second round surface corresponding to the first round surface at an inner corner, and wherein the rotor is spaced apart from a second receiving portion; And
A ball disposed between the first round surface of the rotor and the second round surface of the base;
A first driving unit disposed on the rotor; And
Includes; a second driving unit disposed on the base,
A camera driving device in which a direction of the first round surface or a direction of the second round surface crosses a direction of an optical axis. The method of claim 1,
A camera driving device in which an area of the second round surface is different from that of the first round surface. The method of claim 2,
A camera driving device in which an area of the second round surface is larger than an area of the first round surface. The method of claim 1,
Further comprising a lens portion coupled to the first inner receiving portion of the rotor,
A camera driving device in which the rotor is integrally moved with the lens unit by the first driving unit and the second driving unit. The method of claim 4,
The lens unit is rotated along the first round surface and the second round surface with respect to the optical axis, and the lens unit is tilted vertically and horizontally with respect to the optical axis along the first round surface and the second round surface. Moving camera drive. The method of claim 1,
The rotor is a camera driving device including a ball receiving portion in which the ball is disposed. The method of claim 1,
Camera driving device further comprising an upper spring disposed in contact with the upper side of the base and the rotor. The method of claim 7,
Further comprising a circuit board disposed under the base and controlling the driving unit,
The circuit board includes a rigid circuit board and a flexible circuit board,
A camera driving device in which a part of the flexible circuit board is disposed under the rotor. The method of claim 1,
Further comprising an upper spring disposed on the rotor and the base,
The upper spring is a camera driving device comprising an outer support portion, a spring portion connected to the inner side of the outer support portion, and an inner support portion connected inwardly to the spring portion. The method of claim 9,
The outer support is fixed to the base,
The camera driving device that the inner support portion is fixed to the rotor. A camera module comprising the camera driving device of any one of claims 1 to 10.

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