CN220730584U

CN220730584U - Lens driving device

Info

Publication number: CN220730584U
Application number: CN202322130025.0U
Authority: CN
Inventors: 权五柄; 林铢哲
Original assignee: Samsung Electro Mechanics Co Ltd
Current assignee: Samsung Electro Mechanics Co Ltd
Priority date: 2022-08-09
Filing date: 2023-08-09
Publication date: 2024-04-05
Anticipated expiration: 2033-08-09
Also published as: CN117590668A

Abstract

The lens driving device includes: a lens holder configured to accommodate a lens; a carrying part configured to accommodate the lens holder; a first optical image anti-shake (OIS) driver disposed outside the lens holder and configured to drive the lens holder in a first direction perpendicular to the optical axis; and a second OIS driver disposed outside the carrier to be opposite to the first OIS driver, and a lens holder interposed between the first OIS driver and the second OIS driver, the second OIS driver configured to drive the carrier in a second direction perpendicular to the optical axis and the first direction.

Description

Lens driving device

Technical Field

The present disclosure relates to a camera module having a lens driving device.

Background

In information and communication technology, the provision and use of electronic devices tends to provide various functions that are aggregated with each other, rather than staying in their traditional unique field.

Cameras in electronic devices such as smartphones, tablet Personal Computers (PCs) or laptop computers may include an Auto Focus (AF) function, an optical image anti-shake (OIS) function, and/or a zoom function.

The auto-focus function may acquire a clear image of an object from an imaging surface of an image sensor by moving a lens in an optical axis direction based on a lens-to-object distance provided in front of the image sensor.

The optical image anti-shake function may include camera shake correction, hand tremble correction, and the like, and may stabilize an object image photographed due to unintentional camera shake or hand tremble of a photographer when the camera is moving or not fixed.

Camera functions in portable electronic devices are becoming more complex and sophisticated, which may increase the size and weight of their sensor units and lens drivers; however, the increased weight of the lens driver may, for example, cause distortion of the device and/or reduce the performance of the camera.

Accordingly, there is an increasing need for a camera module that can cope with high-frequency interference while including a lens driver having a smaller weight by reducing camera shake during video recording.

Disclosure of Invention

This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In one or more general aspects, a lens driving apparatus includes: a lens holder configured to receive a lens and including a central opening; a carrying part configured to accommodate the lens holder; a first optical image anti-shake (OIS) driver disposed outside the lens holder and configured to drive the lens holder in a first direction perpendicular to the optical axis; and a second OIS driver disposed outside the carrier to be opposite to the first OIS driver, and a lens holder interposed between the first OIS driver and the second OIS driver, the second OIS driver configured to drive the carrier in a second direction perpendicular to the optical axis and the first direction.

The lens driving device may further include an Auto Focus (AF) driver provided outside the lens holder, configured to drive the lens holder in the optical axis direction.

The AF driver and the first OIS driver may be disposed on the same outer surface of the lens holder.

The AF driver may include an AF driving magnet provided on one of outer surfaces of the lens holder to face the AF driving coil, with a gap between the AF driving magnet and the AF driving coil. The first OIS driver may include a first OIS driving magnet disposed on one of outer surfaces of the lens holder to face the first OIS driving coil with a gap therebetween. The second OIS driver may include a second OIS driving magnet disposed on one of outer surfaces of the carrier to face the second OIS driving coil with a gap therebetween.

The AF drive magnet and the first OIS drive magnet may be disposed on the same outer surface of the lens holder.

The first OIS driving magnet may include a pair of magnets disposed on opposite sides of one outer surface of the lens holder, and the AF driving magnet is interposed between the pair of magnets.

The first OIS drive magnet may include regions divided by different poles in a first direction.

The lens driving device may further include an elastic member connecting the lens holder and the bearing part to each other and configured to provide a restoring force to the lens holder in the optical axis direction or the first direction.

The elastic member may include an elastic wire extending in the second direction to connect the lens holder with the bearing part.

The bearing part is arranged on the base. The rolling member may be interposed between the bearing portion and the base.

The lens driving device may further include a holding magnet and a holding yoke provided on the bearing part and the base, respectively, to generate an attractive force between the bearing part and the base.

In another or more general aspects, a lens driving apparatus includes: a lens holder configured to receive a lens and including a central opening; a carrying part configured to accommodate the lens holder; a lens driver configured to drive the lens holder in an optical axis direction or a first direction perpendicular to the optical axis, or to drive the carrier part in a second direction perpendicular to the optical axis direction and the first direction; and an elastic member configured to connect the lens holder to the bearing portion and to provide a restoring force to the lens holder in the optical axis direction or the first direction.

The lens driver may include a first driving unit configured to drive the lens holder in the optical axis direction and a first direction, and a second driving unit configured to drive the carrier part in a second direction.

The first driving unit and the second driving unit may be disposed opposite to each other with the lens holder interposed therebetween.

The elastic member may include an elastic wire extending in the second direction to connect the lens holder and the carrier portion.

One end of the elastic wire may be connected to an outer portion of the lens holder, and the other end of the elastic wire may be connected to an inner portion of the carrier.

A holding magnet and a holding yoke may be provided on the bearing portion and the base, respectively, to generate attractive force between the bearing portion and the base.

In another or more general aspects, a lens driving apparatus includes: a lens holder configured to receive a lens and including a central opening; a carrying part configured to accommodate the lens holder; a first driving unit configured to drive the lens holder in an optical axis direction and a first direction perpendicular to the optical axis; and a second driving unit configured to drive the bearing portion in a second direction perpendicular to the optical axis and the first direction.

The lens holder may be configured to move relative to the carrier in the optical axis direction or the first direction.

The lens holder and the carrying portion are accommodated in the base. The carrier may be configured to move relative to the base in a second direction.

The carrier may be configured to move with the lens holder in the second direction.

In another general aspect, a lens driving apparatus includes: a lens holder configured to move in an optical axis direction or in a first direction perpendicular to the optical axis and including a center opening; a carrying part configured to accommodate the lens holder and move in a second direction perpendicular to the optical axis direction and the first direction; an elastic member configured to connect the lens holder to the bearing portion and to provide a restoring force to the lens holder in an optical axis direction or a first direction; and a rolling member interposed between the bearing portion and a base configured to mount the bearing portion.

The lens holder may include a lens holder yoke, and the carrier may include a carrier yoke. The elastic member may connect the lens holder yoke to the carrier yoke.

The elastic member may include elastic wires connecting opposite ends of the lens holder yoke to opposite ends of the carrier yoke.

The rolling member may include a plurality of balls accommodated in a plurality of guide grooves provided at an edge region of the base. Each of the plurality of guide grooves may extend in the second direction to guide the bearing portion in the second direction.

The lens driving apparatus may further include: a first optical image anti-shake (OIS) driver disposed outside the lens holder and configured to drive the lens holder; a second OIS driver configured to drive the carrier in a second direction, wherein the second OIS driver is disposed outside the carrier to be opposite to the first OIS driver, and the lens holder is interposed between the first OIS driver and the second OIS driver; and an Auto Focus (AF) driver provided outside the lens holder, configured to drive the lens holder in an optical axis direction.

The AF driver may include an AF driving magnet provided on a first outer surface of the lens holder to face the AF driving coil, with a gap between the AF driving magnet and the AF driving coil. The first OIS driver may include a first OIS driving magnet disposed on the first outer surface of the lens holder to face the first OIS driving coil with a gap therebetween. The second OIS driver may include a second OIS driving magnet disposed on a second outer surface of the carrier to face the second OIS driving coil with a gap therebetween.

The first OIS drive magnet may include a pair of magnets disposed on opposite sides of the first outer surface of the lens holder, and the AF drive magnet is interposed between the pair of magnets.

Other features and aspects will become apparent from the appended claims, the accompanying drawings, and the following detailed description.

Drawings

Fig. 1 is an exploded perspective view illustrating an example of a camera module having an opened cover according to an embodiment.

Fig. 2 is an exploded perspective view illustrating an disassembled configuration of the camera module shown in fig. 1.

Fig. 3 is a perspective view illustrating a state in which a lens holder and a carrier of the camera module shown in fig. 2 are coupled to each other.

Fig. 4 is a bottom perspective view illustrating a state in which a lens holder and a carrier of the camera module shown in fig. 2 are coupled to each other.

Fig. 5 is another angular perspective view illustrating a state in which a lens holder and a carrier of the camera module shown in fig. 2 are coupled to each other.

Fig. 6 is a perspective view illustrating a state in which a yoke member and an elastic wire of the camera module shown in fig. 2 are coupled to each other.

Fig. 7 is a perspective view showing a relative relationship between a driving magnet provided in a lens holder of the camera module shown in fig. 2 and a driving coil corresponding thereto.

Fig. 8 is a perspective view illustrating a state in which a Flexible Printed Circuit Board (FPCB) is connected to an AF driving coil and a first OIS driving coil of the camera module shown in fig. 2 for power and signal connection thereof.

Fig. 9 is a sectional view taken along line IX-IX' of the camera module with the cover shown in fig. 1 coupled to the camera module.

Throughout the drawings and detailed description, the same reference numerals will be understood to refer to the same or similar elements, features and structures unless otherwise described or provided. The figures may not be drawn to scale and the relative sizes, proportions, and depictions of elements in the figures may be exaggerated for clarity, illustration, and convenience.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatus, and/or systems described herein. However, various alterations, modifications and equivalents of the methods, devices and/or systems described herein will be apparent upon an understanding of the disclosure of the present application. For example, the order in which operations are described herein and/or the order in which operations are described herein is merely an example, and is not limited to the order set forth herein, except in which operations must occur in a particular sequence and/or order of operations, but may be varied as will be apparent upon review of the disclosure of the present application. As another example, an order of operations and/or an order of operations may be performed in parallel, except for an order of operations and/or an order of operations that must occur in one sequence (e.g., a particular sequence). In addition, descriptions of features that are known after understanding the present disclosure may be omitted for clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided solely to illustrate some of the many possible ways of implementing the methods, devices, and/or systems described herein that will be apparent after an understanding of the present disclosure. Herein, the use of the word "may" (e.g., what may be included or implemented with respect to an example or embodiment) means that there is at least one example or embodiment in which such features are included or implemented, and all examples or embodiments are not limited thereto.

Throughout the specification, when a component, element, or layer is referred to as being "on," "connected to," "coupled to," or "joined to" another component, element, or layer, it can be directly "on," "connected to," "coupled to," or "joined to" the other component, element, or layer (e.g., in contact with the other component, element, or layer), or one or more other components, elements, layers may reasonably be present between the component, element, or layer and the other component, element, or layer. When a component or element is referred to as being "directly on", "directly connected to", "directly coupled to" or "directly engaged to" another component or element, there are no other components or elements intervening between the component or element and the other component or element. Also, expressions such as "between …" and "directly between …" and "adjacent" and "directly adjacent" can be interpreted as described previously.

Although terms such as "first," "second," and "third," or A, B, (a), (b), etc., may be used herein to describe various elements, components, regions, layers, or sections, these elements, components, regions, layers, or sections are not limited by these terms. Each of these terms is not intended to limit, for example, the importance, sequence, or order of the corresponding member, component, region, layer, or section, but is only used to distinguish the corresponding member, component, region, layer, or section from other members, components, regions, layers, or sections. Thus, a first member, first component, first region, first layer, or first portion referred to in these examples may also be referred to as a second member, second component, second region, second layer, or second portion without departing from the teachings of the examples described herein.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The articles "a," "an," and "the" are intended to also include the plural forms unless the context clearly indicates otherwise. As a non-limiting example, the terms "comprises," "comprising," and "having" specify the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, and/or groups thereof, or groups thereof. Furthermore, although an embodiment may describe the presence of the stated features, numbers, operations, components, elements, and/or combinations thereof, other embodiments may exist where one or more of the stated features, numbers, operations, components, elements, and/or combinations thereof may not exist.

Variations from the shapes of the illustrations as a result, of manufacturing techniques and/or tolerances, are to be expected. Accordingly, examples described herein are not limited to the specific shapes shown in the drawings, but include shape variations that occur during manufacture.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs, especially after understanding the disclosure of this application. Terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art, particularly in the context of the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Further, throughout the specification, the expression "on a plane" may denote a case where the object is viewed from the top, and the expression "on a section" may denote a case where the section of the object taken in the vertical direction is viewed from the side of the object.

Disclosed are a lens driving apparatus which can prevent deformation of components by reducing the weight of a lens driver and cope with high frequency interference by reducing camera shake during image photographing, and a camera module including the same.

Fig. 1 is an exploded perspective view illustrating an example of a camera module having an opened cover according to an embodiment. Fig. 2 is an exploded perspective view illustrating an disassembled configuration of the camera module shown in fig. 1.

Referring to fig. 1 and 2, a camera module 100 according to the present embodiment may include a lens barrel 110, a lens driving device 120 configured to move the lens barrel 110, an image sensor unit 170 configured to convert light incident through the lens barrel 110 into an electrical signal, a base 101 configured to accommodate the lens barrel 110 and the lens driving device 120, and a cover 103 configured to cover the base 101.

The lens barrel 110 may have a hollow cylindrical shape for accommodating therein a plurality of lenses capturing an image of a subject, and the plurality of lenses may be installed in the lens barrel 110 along an optical axis. The number of lenses disposed in the lens barrel 110 may depend on the design and needs of the lens barrel 110, and each lens may have different optical characteristics, such as the same or different refractive indices.

The optical axis may be provided as a central axis of a lens accommodated in the lens barrel 110, and the optical axis direction refers to a direction parallel to the central axis. In the drawings, the optical axis is set to the Z axis, and the X axis and the Y axis are set in a direction perpendicular to the optical axis. Here, the X axis and the Y axis are perpendicular to each other, and an X-Y plane formed by the X axis and the Y axis becomes a plane perpendicular to the optical axis.

The lens barrel 110 may be accommodated in the lens holder 151, and the lens holder 151 may be accommodated in the carrier 131. The lens holder 151 may have a central opening into which the lens barrel 110 may be inserted, and the lens barrel 110 may be coupled and fixed to the lens holder 151 through the central opening. The lens holder 151 and the bearing 131 may be disposed together on the base 101. For example, the lens holder 151 may have a quadrangular shape. The carrier 131 may have the shape of greek capital letter pi (pi) and is disposed to surround the lens holder 151 on three sides. The base 101 may have a quadrilateral shape with a central opening. The center opening of the lens holder 151 and the center opening of the base 101 may be aligned with each other in the optical axis direction.

The lens driving apparatus 120 may include a lens holder 151, a first driving unit 125 coupled with the lens holder 151, a bearing 131, and a second driving unit 127 coupled with the bearing 131. The first driving unit 125 and the second driving unit 127 may be disposed opposite to each other with the lens holder 151 interposed therebetween. The first driving unit 125 and the second driving unit 127 may be included in a lens driver configured to drive the lens holder 151 in the optical axis direction or the first direction, or to drive the bearing 131 in the second direction.

The first driving unit 125 may provide a driving force to move the lens holder 151 in the optical axis direction and a first direction (or X-axis direction in the drawing) perpendicular to the optical axis direction. The second driving unit 127 may provide a driving force to move the bearing 131 in a second direction (or Y-axis direction in the drawing) perpendicular to the optical axis and the first direction. Accordingly, the first driving unit 125 may adjust the focus of the camera module 100 by driving the lens holder 151 to move the lens barrel 110 in the optical axis direction. Further, the first driving unit 125 may move the lens barrel 110 in the first direction by driving the lens holder 151. The second driving unit 127 may correct or reduce camera shake by driving the carrier 131 to move the lens barrel 110 in the second direction.

The lens holder 151 is relatively movable in the optical axis direction or the first direction with respect to the bearing 131. The bearing 131 is relatively movable in the second direction with respect to the base 101. In an example, the bearing 131 may move in the second direction together with the lens holder 151.

The first driving unit 125 may include an Auto Focus (AF) driver 140 and a first optical image anti-shake (OIS) driver 150. The AF driver 140 may be coupled to the lens holder 151 and drive the lens holder 151 in the optical axis direction. The AF driver 140 may include an AF driving coil 146 and an AF driving magnet 143 facing the AF driving coil 146. The first OIS driver 150 may include a first OIS driving coil 156 and a first OIS driving magnet 153 facing the first OIS driving coil 156. The AF drive magnet 143 and the first OIS drive magnet 153 may each be fixed to an outer surface of the lens holder 151, and the AF drive coil 146 and the first OIS drive coil 156 may each be fixed to the base 101 through a coil plate 165. In an example, the AF driving coil 146 and the first OIS driving coil 156 may each be a Fine Pattern (FP) coil integrally formed with the coil plate 165.

The support yoke 163 may be disposed outside the coil plate 165 to support the coil plate 165 including the AF drive coil 146 and the first OIS drive coil 156. In an example, the support yoke 163 may be fixed to one end of the carrier 131. A Flexible Printed Circuit Board (FPCB) 168 may be connected to the coil board 165 to transmit a lens driving signal, and the FPCB 168 may extend to the outside of the camera module 100. The board support 108 may be disposed at the outside of the base 101 to support the FPCB 168, and the board support 108 may be fixed at the outside or outer surface of the base 101.

The outer surface of the lens holder 151 to which the AF driving magnet 143 and the first OIS driving magnet 153 are fixed may be disposed inward from the edge of the base 101. Accordingly, the coil plate 165 including the AF drive coil 146 and the first OIS drive coil 156 may also be disposed inwardly from the edge of the base 101. The FPCB 168 connected to the coil plate 165 may be flexibly deformed in response to movement of the lens holder 151 in the optical axis direction or the first direction.

The second driving unit 127 may include a second OIS driver 130. The second OIS driver 130 may be opposite to the first OIS driver 150 with the lens holder 151 interposed therebetween. The second OIS driver 130 may include a second OIS drive coil 136 and a second OIS drive magnet 133 facing the second OIS drive coil 136. The second OIS drive magnet 133 may be fixed to an outer surface of the carrier 131, and the second OIS drive coil 136 may be fixed to the base 101 by a coil plate 135. In an example, the second OIS driving coil 136 may be a Fine Pattern (FP) coil integrally formed with a board.

When power is applied to the AF drive coil 146, the lens holder 151 can be moved in the optical axis direction by electromagnetic force between the AF drive magnet 143 and the AF drive coil 146. In an example in which the lens barrel 110 is accommodated in the lens holder 151, the focus of the camera module 100 may be adjusted in response to movement of the lens barrel 110 in the optical axis direction by movement of the lens holder 151.

The AF drive magnet 143 may be a moving member that is mounted on the lens holder 151 and moves in the optical axis direction together with the lens holder 151. The AF driving coil 146 may be a fixing member fixed to the base 101. Further, the first OIS driving magnet 153 may be a moving member mounted on the lens holder 151 and moving in a first direction together with the lens holder 151. The second OIS driving magnet 133 may be a moving member mounted on the carrier 131 and moving in the second direction together with the carrier 131. The first OIS drive coil 156 and the second OIS drive coil 136 may each be a fixed member fixed to the base 101. However, the present disclosure is not limited thereto. It is within the scope of the present disclosure that the positions of any one or any two or more of the AF drive magnet 143 and AF drive coil 146, the first OIS drive magnet 153 and first OIS drive coil 156, or the second OIS drive magnet 133 and second OIS drive coil 136 may be interchanged.

In an example, the first OIS driver 150 may generate a driving force in a first direction perpendicular to the optical axis, and the second OIS driver 130 may generate a driving force in a second direction perpendicular to the optical axis and perpendicular to the first direction. The first OIS driver 150 and the second OIS driver 130 may be used to correct for image smearing or video jitter, for example, to compensate for yaw, pitch, and roll movements due to user hand jitter during video or image capture. The first OIS driver 150 and the second OIS driver 130 may compensate for camera shake by applying relative displacement corresponding to yaw, pitch, and roll motions of the camera to the lens barrel 110 when camera shake occurs during, for example, image capturing.

An elastic member 141 or 142 connecting the lens holder 151 and the bearing 131 to each other may be disposed between the lens holder 151 and the bearing 131. The elastic member 141 or 142 may provide the lens holder 151 with a restoring force in the optical axis direction or a restoring force in the first direction. The elastic member 141 or 142 may be an elastic wire extending in a second direction perpendicular to the optical axis and perpendicular to the first direction and connecting the lens holder 151 and the bearing part 131 to each other.

The rolling member 123 may be disposed between the bearing 131 and the base 101. When the bearing 131 moves, the rolling member 123 may reduce friction occurring between the bearing 131 and the base 101. The rolling member 123 may have a spherical shape and include a plurality of balls. The plurality of balls may be respectively received in the plurality of guide grooves 1013 provided at the edge regions of the base 101 (e.g., provided at four corners of the base 101). For example, each of the guide grooves 1013 of the base 101 may extend in the second direction to guide the movement of the bearing 131 in the second direction.

The holding magnet 139 may be fixed to a bottom surface of the bearing 131 facing the base 101. The holding yoke 119 may be fixed to an upper surface of the base 101 opposite to the bottom surface. An attractive force may exist between the holding magnet 139 and the holding yoke 119 to hold the base 101 and the bearing 131 in close contact with each other. Here, the base 101 and the bearing 131 may be in close contact with each other while maintaining a predetermined gap therebetween by the rolling member 123 interposed therebetween.

The image sensor unit 170 may be configured to convert light incident thereon through the lens barrel 110 into an electrical signal. For example, the image sensor unit 170 may include a printed circuit board 175, an image sensor 171 connected to the printed circuit board 175, and an infrared filter. The infrared filter may be used to cut off light in an infrared region among light incident thereon through the lens barrel 110.

The lens driving device 120 may be disposed on the base 101. For example, the base 101 may have a quadrangular shape and a central opening. The image sensor unit 170 may be disposed under the base 101.

The cover 103 may be coupled to the base 101 to cover an outer surface of the base 101 and to protect internal components of the camera module 100. In addition, the cover 103 may be used to shield electromagnetic interference (EMI). For example, the cover 103 may be made of a metal shield to shield EMI in the camera module 100 from affecting other electronic components in the electronic device including the camera module 100.

Fig. 3 is a perspective view illustrating a state in which a lens holder and a carrier of the camera module shown in fig. 2 are coupled to each other. Fig. 4 is a bottom perspective view illustrating a state in which a lens holder and a carrier of the camera module shown in fig. 3 are coupled to each other.

Referring to fig. 3, an af driving magnet 143 and a first OIS driving magnet 153 may be disposed on an outer surface of the lens holder 151. For example, the AF driving magnet 143 and the first OIS driving magnet 153 may be disposed adjacent to each other on the same outer surface of the lens holder 151. In an example, the AF driving magnet 143 and the first OIS driving magnet 153 may be inserted and fixed into a receiving groove recessed into an outer surface of the lens holder 151. That is, the AF driving magnet 143 and the first OIS driving magnet 153 may be disposed on the same outer surface of the lens holder 151.

The first OIS drive magnet 153 may include a magnet, such as a pair of magnets. The AF driving magnet 143 may be disposed at an intermediate position of one outer surface of the lens holder 151, for example, in the width direction. A magnet (e.g., a pair of magnets) included in the first OIS driving magnet 153 may be disposed on opposite sides of the outer surface of the lens holder 151 such that the AF driving magnet 143 is interposed therebetween.

A pair of magnets included in the first OIS driving magnet 153 may have opposite polarized poles in a first direction (or X-axis direction in the drawing). That is, each of the pair of magnets may be disposed to have magnetism opposite to each other in the separation region in the first direction.

The AF drive magnet 143 may have a magnetic pole structure polarized in the optical axis direction (e.g., the Z-axis direction in the drawing). That is, the magnets may be disposed to have magnetism opposite to each other in two regions separated in the optical axis direction.

Referring to fig. 4, the bearing part 131 may include a plurality of guide grooves 1313 provided in a bottom surface thereof. Each of the guide grooves 1313 of the bearing 131 may be provided to correspond to the guide groove 1013 of the base 101, and each of the plurality of balls included in the rolling member 123 may be received in the guide groove 1313 of the bearing 131. Each of the guide grooves 1313 of the bearing 131 may extend in the second direction to guide the movement of the bearing 131 in the second direction.

A semi-solid or solid lubricant (e.g., grease) may be applied to each of the guide grooves 1013 or 1313 in which the rolling members 123 are received to reduce the effects of friction and turbulence.

Fig. 5 is another angular perspective view illustrating a state in which a lens holder and a carrier of the camera module shown in fig. 2 are coupled to each other. Fig. 6 is a perspective view illustrating a state in which a yoke member and an elastic wire of the camera module shown in fig. 2 are coupled to each other.

Referring to fig. 5, a second OIS driving magnet 133 may be disposed on an outer surface of the carrier 131. The second OIS drive magnet 133 may be inserted and secured into a recessed receiving groove in the outer surface of the carrier 131.

The second OIS drive magnet 133 may include a magnet, such as a pair of magnets. A pair of magnets included in the second OIS driving magnet 133 may be disposed apart with a gap therebetween at a middle portion of the outer surface of the carrier 131 in the width direction. Each of the pair of magnets included in the second OIS driving magnet 133 may be provided to have the same magnetic properties in the second direction (or Y-axis direction in the drawing).

The sensing magnet 137 may be disposed at a gap between a pair of magnets of the second OIS driving magnet 133. The sensing magnet 137 may detect the position of the carrier 131 based on driving the second OIS driver 130.

Referring to fig. 6, the lens holder 151 may include a lens holder yoke 152 disposed to be biased toward one outer surface. In an example, the lens holder yoke 152 is made of a metal material, and is integrally manufactured with the lens holder 151, for example, by insert injection molding. That is, the lens holder yoke 152 made of a metal material may be inserted into a plastic mold forming the appearance of the lens holder 151 by insert injection molding.

The lens holder yoke 152 may include a main surface portion 152a and a pair of side surface portions 152b, the main surface portion 152a having an area substantially corresponding to one outer surface of the lens holder 151, the side surface portions 152b being bent at respective ends of the main surface portion 152 a. The main surface portion 152a of the lens holder yoke 152 may face the AF driver 140 and the first OIS driver 150, and extend in the first direction. Each of the side surface portions 152b of the lens holder yoke 152 may extend linearly in the second direction, and the protruding piece 152c may be bent at an end of the side surface portion 152 b. The side surface portion 152b may extend to a length shorter than half the width of one outer side edge of the lens holder 151. The protruding piece 152c of the lens holder yoke 152 may protrude outward from the outer surface of the lens holder 151 by being bent from the side surface portion 152b in the first direction.

The carrier 131 may include a carrier yoke 132 disposed to be biased toward one outer surface of the carrier 131. The carrier yoke 132 may be made of a metal material and integrally manufactured with the carrier 131 by insert injection molding. That is, the carrier yoke 132 may be inserted into a plastic mold forming the appearance of the carrier 131 by insert injection molding.

The carrier yoke 132 may have an area substantially corresponding to an outer surface of the carrier 131, face the second OIS driver 130, and extend in the first direction. The exposed portion 132a exposed from the mold of the carrier 131 may be provided on each of both ends of the carrier yoke 132 opposite to each other in the first direction. The exposed portion 132a of the carrier yoke 132 may face the protrusion 152c of the lens holder yoke 152 in the second direction.

The elastic member 141 or 142 may connect the lens holder yoke 152 and the carrier yoke 132 to each other. The elastic member 141 or 142 may include an elastic wire extending in the second direction. The elastic member 141 or 142 may be disposed between the lens holder yoke 152 and the carrier yoke 132 to connect the lens holder yoke 152 and the carrier yoke 132 to each other. In an example, the elastic member 141 or 142 is an elastic wire connected to a portion of the lens holder yoke 152 outside the lens holder 151, and the other end of the elastic wire is connected to a portion of the carrier yoke 132 inside the carrier 131. The elastic wire may be disposed to be symmetrical to each of two opposite sides of the lens holder 151. The elastic wire provided on each of two opposite sides of the lens holder 151 may be a pair of elastic wires provided outside the lens holder 151 in the optical axis direction.

In one example, one end of the elastic member 141 is connected or fixed to the exposed portion 132a at one end of the carrier yoke 132, and the other end of the elastic member 141 is connected or fixed to the protrusion 152c at one end of the lens holder yoke 152. One end of the elastic member 142 is connected or fixed to the exposed portion 132a at the other end of the carrier yoke 132, and the other end of the elastic member 142 is connected or fixed to the protrusion 152c at the other end of the lens holder yoke 152.

In one example, the lens holder yoke 152 and the carrier yoke 132 may be integrally formed with the lens holder 151 and the carrier 131, respectively, or fixed to the lens holder 151 and the carrier 131, respectively.

Accordingly, the elastic member 141 or 142 may connect the lens holder 151 and the bearing part 131 to each other and provide the lens holder 151 with a restoring force in the optical axis direction or a restoring force in the first direction. That is, when the lens holder 151 is moved upward or downward in the optical axis direction by the AF driver 140, the elastic member 141 or 142 may provide a restoring force downward or upward in the optical axis direction. Further, when the lens holder 151 is moved leftward or rightward in the first direction by the first OIS driver 150, the elastic member 141 or 142 may provide a restoring force rightward or leftward in the first direction.

In this embodiment, the elastic member 141 or 142, such as an elastic wire, is disclosed as a support structure without a separate power source. However, the elastic wire may transmit power or signals by being connected to a power or supply terminal. Furthermore, the impact of the disturbance can be reduced by adding a damper to the fixed part of the elastic wire. Such configurations are also within the scope of the present disclosure.

Referring to fig. 7, the AF driving magnet 143 may face the AF driving coil 146. The AF drive magnet 143 may have a magnetic pole structure polarized in the optical axis direction (or the Z-axis direction in the drawing) when viewed from the outside of the lens holder 151. Therefore, when a power signal is applied to the AF drive coil 146, the lens holder 151 mounted with the AF drive magnet 143 can be driven in the optical axis direction.

The first OIS driving magnet 153 may be disposed to face the first OIS driving coil 156. Each of the pair of magnets included in the first OIS driving magnet 153 may have a magnetic pole structure polarized in a first direction (or X-axis direction in the drawing). Accordingly, when a power signal is applied to the first OIS driving coil 156, the lens holder 151 mounted with the first OIS driving magnet 153 may be driven in the first direction.

The second OIS driving magnet 133 may be disposed to face the second OIS driving coil 136. Each of the pair of magnets included in the second OIS driving magnet 133 may be provided to have the same magnetic properties in the second direction (or Y-axis direction in the drawing). Accordingly, when a power signal is applied to the second OIS driving coil 136, the carrier 131 mounted with the second OIS driving magnet 133 may be driven in the second direction, and thus, the lens holder 151 may also be driven in the second direction.

Fig. 8 is a perspective view illustrating a state in which an FPCB is connected to an AF driving coil and a first OIS driving coil of the camera module shown in fig. 2 for power and signal connection thereof.

Referring to fig. 8, the fpcb 168 may be connected to the AF driving coil 146 and the first OIS driving coil 156 of the camera module 100 for power connection and signal transmission thereof. The AF driving coil 146 and the first OIS driving coil 156 may be fixed to the carrier 131 via a coil plate 165, and the FPCB 168 may be connected to the coil plate 165 so as to be electrically connected thereto.

The coil plate 165 may be disposed outside the carrier 131 and fixed to the carrier 131 by a support yoke 163 connected to one end of the carrier 131. The support yoke 163 may include a cut-out region corresponding to the FPCB connector and the electronic component provided on the coil board 165. The FPCB connector and the electronic components of the coil board 165 may be exposed through the cut-out region. Accordingly, the coil plate 165 may be attached and fixed to the support yoke 163, and at the same time, the FPCB 168 may be connected to the exposed FPCB connector.

The FPCB 168 having one end connected to the coil plate 165 may have a flexible portion and extend outward. The board mount 108 may be disposed outside the FPCB 168 and fixed to the base 101 to support the FPCB 168. The terminals exposed to the outside of the FPCB 168 may be connected to an external circuit, thereby transmitting power and signals required to drive the lens.

Referring to fig. 9, the bearing 131 may be disposed on the base 101 by the rolling member 123. The guide groove 1013 may be provided in an upper surface of the base 101, and the guide groove 1313 may be provided in a bottom surface of the carrier 131. These guide slots 1013 and 1313 may be opposite each other to provide a space therebetween. A plurality of balls included in the rolling member 123 may be respectively accommodated in the spaces provided by the guide grooves 1013 and 1313.

Further, the holding magnet 139 may be disposed on a bottom surface of the bearing 131, and the holding yoke 119 may be disposed on an upper surface of the base 101 corresponding to the bottom surface of the bearing 131. The holding yoke 119 may be made of a magnetic material, and when the bearing 131 is seated on the base 101, there may be an attractive force between the holding yoke 119 and the holding magnet 139. Accordingly, the bearing 131 and the base 101 can be brought into close contact with each other by the holding magnet 139 and the holding yoke 119 while maintaining a gap therebetween set by the rolling members 123 accommodated in the guide grooves 1013 and 1313.

As described above, even if the camera has a complicated and precise function, the lens driving apparatus according to the embodiment can reduce power consumption and prevent deformation of components by reducing the weight of the lens driver. The lens driving apparatus according to the embodiment may help to reduce material costs by including fewer parts compared to conventional lens driving apparatuses.

The camera module according to the embodiment may have an AF driving distance and an OIS driving distance increased by changing the arrangement of the AF driver and the OIS driver. Further, the camera module according to the embodiment can provide a satisfactory level of compensation performance by reducing camera shake even in the event of high-frequency interference during video recording using a portable electronic device.

While this disclosure includes particular examples, it will be apparent from an understanding of the disclosure of this application that various changes in form and details can be made therein without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be construed in an illustrative, and not a restrictive sense. The description of features or aspects in each example should be considered as applicable to similar features or aspects in other examples. Suitable results may still be achieved if the described techniques are performed to have different orders and/or if components in the described systems, architectures, devices or circuits are combined in different ways and/or replaced or supplemented by other components or their equivalents.

Therefore, the scope of the present disclosure includes the claims and their equivalents in addition to the above disclosure and all the accompanying drawings, i.e., all modifications within the scope of the claims and their equivalents should be construed as being included in the present disclosure.

Claims

1. A lens driving apparatus, comprising:

a lens holder configured to accommodate a lens;

a carrying part configured to accommodate the lens holder;

a first optical image anti-shake driver disposed outside the lens holder and configured to drive the lens holder in a first direction perpendicular to an optical axis; and

a second optical image shake prevention driver provided outside the bearing portion so as to be opposite to the first optical image shake prevention driver, and the lens holder is interposed between the first optical image shake prevention driver and the second optical image shake prevention driver, the second optical image shake prevention driver being configured to drive the bearing portion in a second direction perpendicular to the optical axis and the first direction.

2. The lens driving apparatus according to claim 1, further comprising:

An autofocus driver, provided outside the lens holder, configured to drive the lens holder in an optical axis direction.

3. The lens driving apparatus according to claim 2, wherein,

the autofocus driver and the first optical image anti-shake driver are disposed on the same outer surface of the lens holder.

4. The lens driving apparatus according to claim 2, wherein,

the auto-focus driver includes an auto-focus driving magnet provided on a first outer surface of the lens holder to face the auto-focus driving coil, and having a gap between the auto-focus driving magnet and the auto-focus driving coil,

the first optical image anti-shake driver includes a first optical image anti-shake driving magnet provided on a second outer surface of the lens holder to face the first optical image anti-shake driving coil, and having a gap between the first optical image anti-shake driving magnet and the first optical image anti-shake driving coil,

the second optical image anti-shake driver includes a second optical image anti-shake driving magnet disposed on a third outer surface of the bearing portion to face the second optical image anti-shake driving coil, and has a gap between the second optical image anti-shake driving magnet and the second optical image anti-shake driving coil.

5. The lens driving apparatus according to claim 4, wherein,

the first outer surface of the lens holder is identical to the second outer surface of the lens holder.

6. The lens driving apparatus according to claim 4, wherein,

the first optical image anti-shake driving magnet includes a pair of magnets disposed on opposite sides of the second outer surface of the lens holder, and the auto-focus driving magnet is interposed between the pair of magnets.

7. The lens driving apparatus according to claim 4, wherein,

the first optical image anti-shake driving magnet includes regions divided by different magnetic poles in the first direction.

8. The lens driving apparatus according to claim 1, further comprising:

and an elastic member connecting the lens holder and the bearing portion to each other and configured to provide a restoring force to the lens holder in an optical axis direction or the first direction.

9. The lens driving apparatus according to claim 8, wherein,

the elastic member includes an elastic wire extending in the second direction to connect the lens holder and the bearing portion.

10. The lens driving apparatus according to claim 1, wherein,

the bearing part is arranged on the base and

wherein a rolling member is interposed between the bearing portion and the base.

11. The lens driving apparatus according to claim 10, further comprising:

a holding magnet and a holding yoke are provided on the bearing portion and the base, respectively, to generate an attractive force between the bearing portion and the base.

12. The lens driving apparatus according to claim 1, wherein the lens driving apparatus is included in a camera module.

13. A lens driving apparatus, comprising:

a lens holder configured to accommodate a lens;

a carrying part configured to accommodate the lens holder;

a lens driver configured to drive the lens holder in an optical axis direction or a first direction perpendicular to an optical axis, or to drive the carrier in a second direction perpendicular to the optical axis direction and the first direction; and

an elastic member configured to connect the lens holder to the bearing portion and to provide a restoring force to the lens holder in the optical axis direction or the first direction.

14. The lens driving apparatus according to claim 13, wherein,

the lens driver includes:

a first driving unit configured to drive the lens holder in the optical axis direction and the first direction; and

and a second driving unit configured to drive the bearing part in the second direction.

15. The lens driving apparatus according to claim 14, wherein,

the first driving unit and the second driving unit are disposed opposite to each other, and the lens holder is interposed between the first driving unit and the second driving unit.

16. The lens driving apparatus according to claim 13, wherein,

the elastic member includes an elastic wire extending in the second direction to connect the lens holder and the bearing part.

17. The lens driving apparatus as claimed in claim 16, wherein,

one end of the elastic wire is connected to an outer portion of the lens holder, and the other end of the elastic wire is connected to an inner portion of the carrier.

18. The lens driving apparatus according to claim 13, wherein,

the bearing part is arranged on the base and

19. The lens driving apparatus as claimed in claim 18, wherein,

20. The lens driving apparatus according to claim 13, wherein the lens driving apparatus is included in a camera module.

21. A lens driving apparatus, comprising:

a lens holder configured to accommodate a lens;

a carrying part configured to accommodate the lens holder;

a first driving unit configured to drive the lens holder in an optical axis direction and a first direction perpendicular to the optical axis; and

and a second driving unit configured to drive the bearing part in a second direction perpendicular to the optical axis and the first direction.

22. The lens driving apparatus as claimed in claim 21, wherein,

the lens holder is configured to move relative to the bearing portion in the optical axis direction.

23. The lens driving apparatus as claimed in claim 21, wherein,

The lens holder and the bearing part are accommodated in a base, and

wherein the carrier is configured to move relative to the base in the second direction.

24. The lens driving apparatus as claimed in claim 21, wherein,

the carrier is configured to move with the lens holder in the second direction.

25. The lens driving apparatus as claimed in claim 21, wherein,

26. The lens driving apparatus of claim 21, wherein the lens driving apparatus is included in a camera module.

27. A lens driving apparatus, comprising:

a lens holder configured to move in an optical axis direction or in a first direction perpendicular to the optical axis;

a carrying portion configured to accommodate the lens holder and move in a second direction perpendicular to the optical axis direction and the first direction;

an elastic member configured to connect the lens holder to the bearing portion and to provide a restoring force to the lens holder in the optical axis direction or the first direction; and

And a rolling member interposed between the bearing portion and a base configured to seat the bearing portion.

28. The lens driving apparatus of claim 27, wherein the lens holder comprises a lens holder yoke and the carrier comprises a carrier yoke, and wherein the lens holder comprises a lens holder yoke and the carrier comprises a carrier yoke

The elastic member connects the lens holder yoke to the carrier yoke.

29. The lens driving apparatus of claim 28, wherein the elastic member comprises an elastic wire connecting opposite ends of the lens holder yoke to opposite ends of the carrier yoke.

30. The lens driving apparatus according to claim 27, wherein the rolling member includes a plurality of balls accommodated in a plurality of guide grooves provided at an edge region of the base, and

wherein each of the plurality of guide grooves extends in the second direction to guide the bearing portion in the second direction.

31. The lens driving apparatus according to claim 27, further comprising:

a first optical image anti-shake driver disposed outside the lens holder and configured to drive the lens holder;

A second optical image shake prevention driver configured to drive the bearing part in the second direction, wherein the second optical image shake prevention driver is disposed outside the bearing part so as to be opposite to the first optical image shake prevention driver, and the lens holder is interposed between the first optical image shake prevention driver and the second optical image shake prevention driver; and

an autofocus driver, provided outside the lens holder, configured to drive the lens holder in the optical axis direction.

32. The lens driving apparatus as claimed in claim 31, wherein,

the first optical image anti-shake driver includes a first optical image anti-shake driving magnet provided on the first outer surface of the lens holder to face a first optical image anti-shake driving coil, and having a gap between the first optical image anti-shake driving magnet and the first optical image anti-shake driving coil,

The second optical image anti-shake driver includes a second optical image anti-shake driving magnet disposed on a second outer surface of the bearing portion to face the second optical image anti-shake driving coil, and has a gap between the second optical image anti-shake driving magnet and the second optical image anti-shake driving coil.

33. The lens driving apparatus as claimed in claim 32, wherein,

the first optical image anti-shake driving magnet includes a pair of magnets disposed on opposite sides of the first outer surface of the lens holder, and the auto-focus driving magnet is interposed between the pair of magnets.

34. The lens driving apparatus as claimed in claim 32, wherein,

35. The lens driving apparatus of claim 27, wherein the lens driving apparatus is included in a camera module.