Camera module

Abstract

The camera module includes: a lens module; the bearing part is used for accommodating the lens module; a housing accommodating the bearing portion; and a shake correction driver including three or more position sensors, a plurality of magnets disposed on the lens module, and a plurality of coils disposed on the housing, in which the shake correction driver is configured to form a driving force to move the lens module on a plane perpendicular to the optical axis, wherein at least one of the plurality of magnets faces two or more position sensors among the three or more position sensors, and wherein the position sensor facing one of the plurality of magnets is disposed closer to the optical axis than the position sensor facing another of the plurality of magnets.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2023-0048398 filed on April 12, 2023, in the Korean Intellectual Property Office, and Korean Patent Application No. 10-2023-0069303 filed on May 30, 2023, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein in their entirety by reference for all purposes. Technical Field

[0003] The following description relates to a camera module. Background Art

[0004] Camera modules may be used in portable electronic devices such as smart phones, tablet PCs, and laptop computers.

[0005] The camera module may have various functions such as an auto focus (AF) function, an optical image stabilization (OIS) function, and a zoom (Zoom) function.

[0006] The OIS function can be implemented by moving the lens module in a direction perpendicular to the optical axis. However, when shaking occurs continuously, such as in video shooting, simply moving the lens module in a direction perpendicular to the optical axis has limitations in accurately correcting the shaking.

[0007] The above information is presented as background information only to assist with understanding the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with respect to the present disclosure. Utility Model Content

[0008] The purpose of providing this utility model summary is to introduce a selection of concepts in a concise form, and these concepts will be further described in the following detailed description. This utility model summary is not intended to identify the key features or essential features of the claimed subject matter, nor is it intended to be used to help determine the scope of the claimed subject matter.

[0009] In a general aspect, a camera module includes: a lens module; a carrier that accommodates the lens module; a housing that accommodates the carrier; and a shake correction driver including three or more position sensors, a plurality of magnets disposed on the lens module, and a plurality of coils disposed on the housing, wherein the shake correction driver is configured to form a driving force to move the lens module on a plane perpendicular to an optical axis, wherein at least one of the plurality of magnets may face two or more of the three or more position sensors, and wherein a position sensor facing one of the plurality of magnets is disposed closer to the optical axis than a position sensor facing another of the plurality of magnets.

[0010] Three or more position sensors may be disposed on the side surface of the housing, and among the three or more position sensors, the center of a position sensor disposed closer to the optical axis may be disposed on a straight line connecting the optical axis and the side surface of the housing at the shortest distance.

[0011] The plurality of magnets may each include one or more polarity regions on one surface facing the coil, and the plurality of coils may be disposed to face the polarity regions of the plurality of magnets, respectively.

[0012] Three or more position sensors may be disposed inside at least some of the plurality of coils.

[0013] The plurality of magnets may include a first optical image stabilization (OIS) magnet and a second OIS magnet, the first OIS magnet including at least one of a first polarity region and a second polarity region on a surface facing the coil, the second OIS magnet including a third polarity region and a fourth polarity region on a surface facing the coil, wherein the first polarity region and the second polarity region may have different areas.

[0014] Among the three or more position sensors, the position sensor facing the first OIS magnet may be disposed to face a polarity region having a larger area among the first polarity region and the second polarity region.

[0015] A polarity region having a larger area among the first polarity region and the second polarity region may be disposed closer to the optical axis than the other polarity regions.

[0016] The first OIS magnet may face one position sensor among the three or more position sensors, and the second OIS magnet may face two position sensors among the three or more position sensors.

[0017] The plurality of coils may include a first OIS coil facing the first OIS magnet and a second OIS coil facing the second OIS magnet, wherein the first OIS coil may include one coil or two or more coils of different sizes.

[0018] The camera module may further include a plurality of ball members disposed between the lens module and the carrier, wherein the plurality of ball members may be in single-point contact with the lens module and the carrier, respectively.

[0019] The camera module may further include a focus adjustment unit including a magnet disposed on the carrier, and a coil and a position sensor disposed in the housing to face the magnet.

[0020] In another general aspect, a camera module includes: a lens module; and a shake correction driver configured to move the lens module on a plane perpendicular to an optical axis, wherein the shake correction driver includes: a first sub-driver including a first optical image stabilization (OIS) magnet and a first OIS coil configured to form a first-axis direction driving force in a first-axis direction perpendicular to the optical axis, and a first position sensor facing the first OIS magnet; and a second sub-driver including a second OIS magnet and a second OIS coil configured to form a second-axis direction driving force in a second-axis direction perpendicular to the optical axis and the first-axis direction, and two second position sensors facing the second OIS magnet, wherein the first OIS magnet includes at least one of a first polarity region and a second polarity region having different areas on a surface facing the first OIS coil.

[0021] The first position sensor may face a polarity region having a larger area among the first polarity region and the second polarity region.

[0022] The first position sensor may be disposed closer to the optical axis than the second position sensor.

[0023] The first OIS coil and the second OIS coil may be provided in a number corresponding to the number of polarity regions included in the first OIS magnet and the second OIS magnet.

[0024] The camera module may further include: a carrier for accommodating the lens module; and a plurality of ball members disposed between the lens module and the carrier such that the plurality of ball members may make single-point contact with the lens module and the carrier, respectively.

[0025] In another general aspect, a camera module includes: a lens barrel including one or more lenses arranged on an optical axis; a lens holder accommodating the lens barrel and configured to move in a plane perpendicular to the optical axis; a bearing portion accommodating the lens holder and configured to move in the direction of the optical axis; and a shake correction driver configured to move the lens holder relative to the bearing portion in a plane and including: a first optical image stabilization (OIS) magnet arranged on the lens holder; a first OIS coil arranged to face the first OIS magnet in a first direction in the plane; a second OIS magnet arranged on the lens holder; and a second OIS coil arranged to face the second OIS magnet in a second direction in the plane perpendicular to the first direction, wherein the first OIS magnet has a first polarity region extending in the second direction and facing the first OIS coil, wherein the second OIS magnet has a second polarity region extending in the first direction and facing the second OIS coil, and wherein an area of ​​the first polarity region is greater than an area of ​​the second polarity region.

[0026] The first OIS magnet may further include a third polarity region extending in the second direction and facing the first OIS coil, and an area of ​​the third polarity region may be smaller than an area of ​​the first polarity region.

[0027] The camera module may also include: a first OIS position sensor arranged in the first OIS coil, configured to detect the position of the first OIS magnet; and two or more second OIS position sensors arranged in the second OIS coil, configured to detect the position of the second OIS magnet, wherein the first OIS position sensor may be arranged closer to the optical axis than the second OIS position sensor.

[0028] Other features and aspects will become apparent from the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a perspective view of a camera module according to an exemplary embodiment of the present disclosure.

[0030] Figure 2 is a schematic exploded perspective view of a camera module according to an exemplary embodiment of the present disclosure.

[0031] Figure 3 is a partially exploded perspective view of a focus adjustment unit according to an exemplary embodiment of the present disclosure.

[0032] Figure 4 is a partially exploded perspective view of a shake correction unit according to an exemplary embodiment of the present disclosure.

[0033] Figure 5A is along Figure 1 A cross-sectional view taken along line II' of Figure 5Bis along Figure 1 A cross-sectional view taken along line II-II'.

[0034] Figure 6 is a plan view showing an arrangement form of a first driver and a second driver according to an exemplary embodiment of the present disclosure.

[0035] Figures 7 to 9 is a view illustrating a second driver according to an exemplary embodiment of the present disclosure.

[0036] Throughout the drawings and detailed description, unless otherwise described, the same reference numerals refer to the same elements. For purposes of clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative sizes, proportions, and depictions of elements in the drawings may be exaggerated. DETAILED DESCRIPTION

[0037] Hereinafter, although examples of the present disclosure will be described in detail with reference to the accompanying drawings, it should be noted that the examples are not limited thereto.

[0038] The following specific embodiments are provided to help the reader gain a comprehensive understanding of the methods, devices and / or systems described herein. However, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent after understanding the present disclosure. For example, the order of operations described herein is merely an example, and except for operations that must occur in a specific order, it is not limited to the order set forth herein, but can be changed, which will be apparent after understanding the present disclosure. In addition, for greater clarity and brevity, descriptions of features known in the art may be omitted.

[0039] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent after understanding the present disclosure.

[0040] Throughout the specification, when an element such as a layer, a region, or a substrate is described as being “on,” “connected to,” or “coupled to” another element, the element may be directly “on,” “connected to,” or “coupled to” the other element, or one or more other elements may be present between the element and the other element. Conversely, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, no other elements may be present between the element and the other element.

[0041] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items; similarly, "at least one" includes any one of the associated listed items and any combination of any two or more items.

[0042] Although terms such as "first", "second" and "third" may be used herein to describe various members, components, regions, layers or portions, these members, components, regions, layers or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer or portion from another member, component, region, layer or portion. Therefore, without departing from the teachings of the examples described herein, the first member, first component, first region, first layer or first portion mentioned in these examples may also be referred to as the second member, second component, second region, second layer or second portion.

[0043] Spatially relative terms such as "above", "higher", "below", "lower", etc. may be used herein for descriptive convenience to describe the relationship of one element relative to another element as shown in the accompanying drawings. In addition to covering the orientations depicted in the accompanying drawings, these spatially relative terms are intended to also cover different orientations of the device in use or operation. For example, if the device in the accompanying drawings is flipped, an element described as being "above" or "higher" relative to another element will be "below" or "lower" relative to the other element. Therefore, depending on the spatial orientation of the device, the term "above" covers both orientations of "above" and "below". The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein should be interpreted accordingly.

[0044] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the terms "a", "an" and "the" are intended to include plural forms as well. The terms "include", "comprise" and "have" indicate the presence of the features, numbers, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, operations, components, elements and / or combinations thereof.

[0045] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0046] It should be noted that herein, use of the word “may” with respect to an example, such as regarding what an example may include or implement, means that there is at least one example in which such feature is included or implemented, and all examples are not limited thereto.

[0047] The features of the examples described herein may be combined in various ways that will be apparent after understanding the present disclosure. In addition, although the examples described herein have various configurations, other configurations that will be apparent after understanding the present disclosure are also possible.

[0048] In addition, in this specification, the optical axis direction may refer to the direction of the optical axis of the lens module extending upward and downward or the direction parallel to the optical axis, the first axis direction may refer to the direction perpendicular to the optical axis direction, and the second axis direction may refer to the direction perpendicular to both the optical axis direction and the first axis direction.

[0049] One aspect of the present disclosure is to improve the optical image stabilization (OIS) performance of a small camera module employed in a portable electronic device.

[0050] The camera module according to the exemplary embodiment of the present disclosure may accurately correct shaking.

[0051] The present disclosure relates to a camera module 1 mounted on a portable electronic device. The portable electronic device may be a smart phone, a mobile communication terminal, a tablet PC, a laptop computer, or the like.

[0052] Figure 1 is a perspective view of a camera module according to an exemplary embodiment of the present disclosure, and Figure 2 is a schematic exploded perspective view of a camera module according to an exemplary embodiment of the present disclosure.

[0053] Reference Figure 1 and Figure 2 , a camera module 1 according to an exemplary embodiment of the present disclosure may include a housing 110 , a lens module 200 disposed in the housing 110 , a carrier 300 , and an image sensor module 400 .

[0054] For example, the lens module 200 may be accommodated in the carrier 300, and the carrier 300 may be accommodated in the housing 110. The image sensor module 400 may be disposed on the bottom of the housing 110.

[0055] In addition, the camera module 1 may include a housing 130 coupled to the case 110. The housing 130 may be coupled to the case 110 to cover the case 110.

[0056] According to an exemplary embodiment of the present disclosure, the housing 110 may be a fixed body. Therefore, the housing 130 and the image sensor module 400 fixedly coupled to the housing 110 may also be fixed bodies.

[0057] Meanwhile, the lens module 200 and the carrier 300 accommodated in the housing 110 may be moving bodies. The lens module 200 and the carrier 300 may be relatively movable with respect to the housing 110.

[0058] For example, the carrier 300 can move relative to the housing 110 in the optical axis (Z axis) direction. Since the lens module 200 is accommodated in the carrier 300, the lens module 200 can move relative to the housing 110 together with the carrier 300 in the optical axis (Z axis) direction.

[0059] In addition, the lens module 200 can be relatively moved on a plane (XY plane) perpendicular to the optical axis (Z axis) relative to the carrier 300 and the housing 110. In detail, the lens module 200 can be moved on a plane (XY plane) perpendicular to the optical axis (Z axis) in a first axis (X axis) direction and a second axis (Y axis) direction perpendicular to the optical axis (Z axis), and can also be rotated using the optical axis (Z axis) as a rotation axis.

[0060] The lens module 200 may include a lens barrel 210 and a lens holder 230 .

[0061] The lens barrel 210 may accommodate at least one lens for capturing an image of a subject. When a plurality of lenses are accommodated in the lens barrel 210, the plurality of lenses may be arranged along an optical axis (Z axis).

[0062] The lens barrel 210 may be accommodated in the lens holder 230. For example, the lens barrel 210 may be coupled to the lens holder 230 by an adhesive or the like. Figure 6 ) can be set in the lens holder 230.

[0063] The image sensor module 400 may include an image sensor and a sensor substrate on which the image sensor is disposed.

[0064] The image sensor may convert light incident through the lens module 200 into an electrical signal. For example, the image sensor may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The electrical signal converted by the image sensor may be output as an image or video through a display unit of a portable electronic device equipped with the camera module 1.

[0065] The sensor substrate may be a printed circuit board, and the image sensor may be electrically connected to the sensor substrate.

[0066] The image sensor module 400 may further include an infrared filter disposed between the lens module 200 and the image sensor. The infrared filter may be used to block light in an infrared region among light incident through the lens module 200.

[0067] The camera module 1 according to the exemplary embodiment of the present disclosure may have a focus adjustment function, and the focus adjustment function may be implemented by moving the carrier 300 in the optical axis (Z-axis) direction.

[0068] Since the lens module 200 is accommodated in the carrier 300, the lens module 200 can move in the optical axis (Z axis) direction together with the carrier 300. In this process, the distance between the lens module 200 and the image sensor module 400 in the optical axis (Z axis) direction can be changed to adjust the focus of the camera module 1.

[0069] Figure 3 is a partially exploded perspective view of a focus adjustment unit according to an exemplary embodiment of the present disclosure.

[0070] Reference Figure 3 The focus adjustment unit may include a carrier 300 that moves in the optical axis (Z axis) direction and a first driver 500 (or a focus adjustment driver) for generating a driving force to move the carrier 300 in the optical axis (Z axis) direction.

[0071] The carrier 300 may be accommodated in the housing 110 , and may be relatively moved in the optical axis (Z-axis) direction with respect to the housing 110 by a driving force generated by the first driver 500 .

[0072] The first driver 500 may include a first magnet 510 and a first coil 530 .

[0073] The first magnet 510 and the first coil 530 may be disposed in the carrier 300 and the housing 110, respectively. For example, the first magnet 510 may be disposed in the carrier 300, and the first coil 530 may be disposed in the housing 110. Therefore, the first magnet 510 may be a moving member that moves in the optical axis (Z-axis) direction together with the carrier 300, and the first coil 530 may become a fixed member fixed to the housing 110. However, an exemplary embodiment in which the positions of the first magnet 510 and the first coil 530 are changed from each other is also possible.

[0074] The first magnet 510 and the first coil 530 may be disposed to face each other to generate a driving force. For example, the first magnet 510 may be disposed on a side surface of the carrier 300, and the first coil 530 may be disposed on a side surface of the housing 110 that faces the side surface of the carrier 300 on which the first magnet 510 is disposed. Therefore, the first magnet 510 and the first coil 530 may face each other in a direction perpendicular to the optical axis (Z axis).

[0075] Meanwhile, the back yoke 573 may be disposed on a side surface of the carrier 300 where the first magnet 510 is disposed. For example, the back yoke 573 may be inserted into the carrier 300. The back yoke 573 may prevent the magnetic flux of the first magnet 510 from leaking.

[0076] The first magnet 510 may have a shape in which an N pole and an S pole are magnetized in the optical axis (Z-axis) direction, and a neutral region may be provided between the N pole and the S pole.

[0077] The first coil 530 may be mounted on the substrate 700 , and the substrate 700 on which the first coil 530 is mounted may be disposed on a side surface of the housing 110 .

[0078] For example, the substrate 700 may be The shape is provided on three side surfaces of the housing 110. In this case, the first coil 530 may be mounted on one surface of the substrate 700 provided on a side surface of the housing 110 facing the side surface of the carrier 300 on which the first magnet 510 is provided.

[0079] When power is supplied to the first coil 530, an electromagnetic force may be generated between the first magnet 510 and the first coil 530, and the electromagnetic force may be a driving force for moving the carrier 300 in the optical axis (Z axis) direction. Since the lens module 200 is accommodated in the carrier 300, when the carrier 300 moves in the optical axis (Z axis) direction, the lens module 200 may also move in the optical axis (Z axis) direction.

[0080] The first position sensor 550 may be disposed on the substrate 700 together with the first coil 530. For example, the first position sensor 550 may be disposed inside the first coil 530 and may face the neutral zone of the first magnet 510 in a direction perpendicular to the optical axis (Z axis).

[0081] The first position sensor 550 may detect the position of the carrier 300 in the optical axis (Z-axis) direction, and may be provided as, for example, a Hall sensor.

[0082] The stopper 150 may be disposed between the housing 130 and the lens module 200. For example, the housing 130, the stopper 150, the lens module 200, the carrier 300, and the housing 110 may be sequentially disposed in the optical axis (Z axis) direction.

[0083] The stopper 150 may be coupled to the carrier 300 to cover the upper surface of the lens module 200. The stopper 150 may prevent the lens module 200 from being separated to the outside of the carrier 300 when an external impact or the like is applied to the camera module 1.

[0084] In addition, the stopper 150 may be provided with a buffer member (not shown) for absorbing the impact of the collision between the lens module 200 and the housing 130 when the carrier 300 moves in the optical axis (Z axis) direction. For example, the buffer member may be provided on the surfaces of the stopper 150 facing the housing 130 and the lens module 200, respectively.

[0085] A first ball member B1 and a second ball member B2 for guiding the movement of the bearing portion 300 in the optical axis (Z-axis) direction may be disposed between the bearing portion 300 and the housing 110 .

[0086] The first ball member B1 and the second ball member B2 may be spaced apart from each other in a direction perpendicular to the optical axis (Z axis). For example, the first ball member B1 and the second ball member B2 may be separated in a direction perpendicular to the optical axis (Z axis) between the bearing portion 300 and the housing 110, and the first magnet 510 is interposed between the first ball member B1 and the second ball member B2.

[0087] The first ball member B1 and the second ball member B2 may include at least one ball (sphere) that moves in a rolling motion. In addition, the first ball member B1 and the second ball member B2 may include different numbers of balls (spheres). For example, the first ball member B1 may include three balls (spheres) arranged in the direction of the optical axis (Z axis), and the second ball member B2 may include two balls (spheres) arranged in the direction of the optical axis (Z axis). However, the number of balls (spheres) included in the first ball member B1 and the second ball member B2 is not limited thereto.

[0088] The first ball member B1 and the second ball member B2 may be disposed between guide grooves formed in the bearing portion 300 and the housing 110 , respectively.

[0089] The bearing portion 300 may include a first guide groove G1 on one side and a second guide groove G2 on the other side relative to the first magnet 510. In addition, the housing 110 may include a third guide groove G3 facing the first guide groove G1 and a fourth guide groove G4 facing the second guide groove G2 (see Figure 6). The first ball member B1 may be disposed between the first guide groove G1 and the third guide groove G3, and the second ball member B2 may be disposed between the second guide groove G2 and the fourth guide groove G4.

[0090] The first to fourth guide grooves G1 to G4 can all extend in the direction of the optical axis (Z axis), and therefore, when each of the first ball member B1 and the second ball member B2 is arranged between the first to fourth guide grooves G1 to G4, the first ball member B1 and the second ball member B2 can move in a rolling motion in the direction of the optical axis (Z axis).

[0091] According to an embodiment of the present disclosure, the first guide groove G1 and the third guide groove G3 may have a “v”-shaped cross-section cut in a direction perpendicular to the optical axis (Z axis).

[0092] In the first ball member B1, among the three balls (spheres) arranged along the optical axis (Z axis), at least two balls (spheres) arranged on the outermost side can be in two-point contact with the first guide groove G1 and the third guide groove G3, respectively. Therefore, the first ball member B1 can be used as a main guide member for guiding the movement of the bearing part 300 in the optical axis (Z axis) direction.

[0093] In the second guide groove G2 and the fourth guide groove G4, the cross-sectional shape cut in the direction perpendicular to the optical axis (Z axis) may have a "v" shape or a "-" shape. For example, the cross section of the second guide groove G2 may have a "-" shape, and the cross section of the fourth guide groove G4 may have a "v" shape.

[0094] In the second ball member B2, at least a portion of the two balls (spheres) arranged in the optical axis (Z axis) direction can be in single-point contact with the second guide groove G2, and can be in two-point contact with the fourth guide groove G4. Therefore, the second ball member B2 can be used as an auxiliary guide for supporting the movement of the bearing part 300 in the optical axis (Z axis) direction.

[0095] In the exemplary embodiment of the present disclosure, as long as the first ball member B1 serves as a main guide and the second ball member B2 serves as an auxiliary guide, the second ball member B2 may include a smaller number of balls (spherical bodies) than the first ball member B1.

[0096] The first yoke 570 may be disposed in the housing 110. The first yoke 570 may be disposed to cover the substrate 700, for example, to cover a surface opposite to one surface on which the first coil 530 is disposed.

[0097] The first yoke 570 may be disposed to face the first magnet 510, and the first coil 530 is interposed between the first yoke 570 and the first magnet 510, and the first yoke 570 may generate an attractive force with the first magnet 510. For example, the first yoke 570 and the first magnet 510 may generate an attractive force in a direction perpendicular to the optical axis (Z axis) in which the first yoke 570 and the first magnet 510 face each other. Due to the attractive force, the first ball member B1 and the second ball member B2 may maintain contact with the bearing portion 300 and the housing 110.

[0098] The camera module 1 according to an exemplary embodiment of the present disclosure may have a shake correction function, and the shake correction function may be implemented by moving the lens module 200 in a direction perpendicular to the optical axis (Z axis) and rotating the lens module 200 with the optical axis (Z axis) as a rotation axis.

[0099] Figure 4 is a partially exploded perspective view of a shake correction unit according to an exemplary embodiment of the present disclosure, Figure 5A is along Figure 1 A cross-sectional view taken along line II' of Figure 5B is along Figure 1 A cross-sectional view taken along line II-II', and Figure 6 is a plan view showing an arrangement form of a first driver and a second driver according to an exemplary embodiment of the present disclosure.

[0100] Reference Figure 4 The shake correction unit may include a lens module 200 that moves on a plane (XY plane) perpendicular to the optical axis (Z axis) and a second driver 600 for generating a driving force to move the lens module 200 on a plane (XY plane) perpendicular to the optical axis (Z axis).

[0101] The lens module 200 may be accommodated in the carrier 300 , and may be relatively moved and rotated with respect to the carrier 300 on a plane (XY plane) perpendicular to the optical axis (Z axis) by a driving force generated by the second driver 600 .

[0102] The second driver 600 may include a second magnet 611 (or a first OIS magnet) and a second coil 631 (or a first OIS coil) and a third magnet 613 (or a second OIS magnet) and a third coil 633 (or a second OIS coil).

[0103] The second magnet 611 and the second coil 631 may be respectively disposed in the lens module 200 (specifically, the lens holder 230) and the housing 110, and the third magnet 613 and the third coil 633 may be respectively disposed in the lens module 200 (specifically, the lens holder 230) and the housing 110. For example, the second magnet 611 and the third magnet 613 may be disposed in the lens holder 230, and the second coil 631 and the third coil 633 may be disposed in the housing 110. Therefore, the second magnet 611 and the third magnet 613 may be a moving member that moves on a plane (XY plane) perpendicular to the optical axis (Z axis) together with the lens module 200, and the second coil 631 and the third coil 633 may be a fixed member fixed to the housing 110. However, an exemplary embodiment in which the positions of the second magnet 611 and the third magnet 613 and the second coil 631 and the third coil 633 are changed from each other is also possible.

[0104] The second magnet 611 and the second coil 631 may be arranged to face each other to generate a driving force, and the third magnet 613 and the third coil 633 may be arranged to face each other to generate a driving force. For example, the second magnet 611 and the third magnet 613 may be respectively arranged on different side surfaces of the lens holder 230, and the second coil 631 and the third coil 633 may be arranged on side surfaces of the housing 110 that face the side surfaces of the lens holder 230 on which the second magnet 611 and the third magnet 613 are arranged, respectively. Therefore, the second magnet 611 and the second coil 631 may face each other in a direction perpendicular to the optical axis (Z axis), and the third magnet 613 and the third coil 633 may face each other in a direction perpendicular to the optical axis (Z axis).

[0105] Meanwhile, the back yoke 575 may be disposed on the side surface of the lens holder 230 where the second and third magnets 611 and 613 are disposed. For example, the back yoke 575 may be inserted into the lens holder 230. The back yoke 575 may prevent magnetic fluxes of the second and third magnets 611 and 613 from leaking.

[0106] The second magnet 611 and the third magnet 613 may have one or more polarity regions in the longitudinal direction of each magnet (eg, a direction perpendicular to the optical axis (Z axis)), and a neutral region may be provided between two or more polarity regions.

[0107] Meanwhile, according to an exemplary embodiment of the present disclosure, one of the second magnet 611 and the third magnet 613 may include polarity regions having different areas.

[0108] In addition, each of the second coil 631 and the third coil 633 may include one or more coils. For example, the second coil 631 and the third coil 633 may include a number of coils corresponding to the number of polarity regions included in one surface of the second magnet 611 and the third magnet 613 facing the coils. When the second coil 631 and the third coil 633 include a plurality of coils, the plurality of coils may be arranged in the longitudinal direction of the second magnet 611 or the third magnet 613 to face the polarity region of each magnet.

[0109] The second coil 631 and the third coil 633 may be mounted on the substrate 700 together with the first coil 530 , and disposed on the side surface of the housing 110 .

[0110] For example, the second coil 631 and the third coil 633 may be mounted on The remaining two surfaces of the shaped substrate 700 where the first coil 530 is not disposed. That is, the second magnet 611 and the third magnet 613 may also be disposed on two different surfaces of the lens holder 230 so as not to overlap with one surface of the carrier 300 where the first magnet 510 is disposed.

[0111] In an exemplary embodiment, when power is supplied to the second coil 631, an electromagnetic force may be generated between the second magnet 611 and the second coil 631, which may be a driving force for moving the lens module 200 in a first axis (X axis) direction or a second axis (Y axis) direction perpendicular to the optical axis (Z axis).

[0112] Similarly, when power is supplied to the third coil 633, an electromagnetic force can be generated between the third magnet 613 and the third coil 633, which can be a driving force for moving the lens module 200 in the first axis (X axis) direction or the second axis (Y axis) direction perpendicular to the optical axis (Z axis).

[0113] In addition, when the electromagnetic force between the second magnet 611 and the second coil 631 and the electromagnetic force between the third magnet 613 and the third coil 633 occur simultaneously, a rotation force for rotating the lens module 200 with the optical axis (Z axis) as a rotation axis may be generated.

[0114] Therefore, the camera module 1 according to the exemplary embodiment of the present disclosure is capable of 3-axis shake correction.

[0115] The second position sensor 651 and the third position sensor 653 may be disposed on the substrate 700 together with the second coil 631 and the third coil 633. For example, the second position sensor 651 and the third position sensor 653 may be disposed inside at least some of the coils included in the second coil 631 and the third coil 633. In other words, the second position sensor 651 or the third position sensor 653 may be disposed inside the coils included in the second coil 631 and the third coil 633, or may not be disposed inside the coils included in the second coil 631 and the third coil 633.

[0116] The second position sensor 651 and the third position sensor 653 can detect the position of the lens module 200 in the direction (X-axis direction and Y-axis direction) perpendicular to the optical axis (Z-axis). For example, the second position sensor 651 and the third position sensor 653 can be provided in the form of a Hall sensor or a D / IC chip in which a Hall sensor is embedded.

[0117] In addition, in order to detect the rotation of the lens module 200, at least one of the second position sensor 651 and the third position sensor 653 may be provided in plural. For example, the number of the second position sensor 651 and the third position sensor 653 may be three in total. Figure 6 , one second position sensor 651 may be provided, and two third position sensors 653 may be provided.

[0118] In the lens module 200 , in particular, between the lens holder 230 and the carrier 300 , a third ball member B3 may be provided to guide movement of the lens module 200 on a plane (XY plane) perpendicular to the optical axis (Z axis).

[0119] The third ball member B3 may include a plurality of balls (spheres) moving in a rolling motion, and may include at least three balls (spheres). For example, the third ball member B3 may include three balls (spheres), and the three balls (spheres) may be respectively disposed at three edges adjacent to the second driver 600.

[0120] The third ball member B3 may be disposed between guide grooves formed in the lens holder 230 and the carrier 300 , respectively.

[0121] The lens holder 230 may include fifth guide grooves G5 at three edges of one surface facing the carrier 300. In addition, the carrier 300 may include sixth guide grooves G6 at three edges of one surface facing the lens holder 230. The third ball member B3 may be disposed between the fifth guide groove G5 and the sixth guide groove G6.

[0122] According to an exemplary embodiment of the present disclosure, in the fifth guide groove G5 and the sixth guide groove G6, as in Figure 5A and Figure 5B The cross-sectional shape cut in the optical axis (Z axis) direction shown in can be a "-" shape, that is, a flat shape. Therefore, the third ball member B3 can contact the fifth guide groove G5 and the sixth guide groove G6 at a single point, respectively.

[0123] In addition, the size of the fifth guide groove G5 and the sixth guide groove G6 may be larger than the diameter of the third ball member B3. Here, the size of the fifth guide groove G5 and the sixth guide groove G6 may refer to the length in the first axis (X axis) direction and the second axis (Y axis) direction.

[0124] Therefore, in a state where the third ball member B3 is disposed between the fifth guide groove G5 and the sixth guide groove G6, the third ball member B3 can freely move in a rolling motion without being limited to a specific direction.

[0125] In a state where the third ball member B3 is disposed between the fifth guide groove G5 and the sixth guide groove G6, the third ball member B3 can guide the movement of the lens module 200 on a plane (XY plane) perpendicular to the optical axis (Z axis) while moving in a rolling motion. In addition, the third ball member B3 can also be used to maintain a gap between the lens module 200 and the bearing portion 300, more specifically, to maintain a gap in the direction of the optical axis (Z axis).

[0126] The pulling yoke 590 may be provided in the carrier 300. For example, the pulling yoke 590 may be provided as a separate member and may be provided in the carrier 300, or may be inserted into the carrier 300 and formed integrally with the carrier 300.

[0127] The pulling yoke 590 may be disposed to face the second magnet 611 and the third magnet 613, respectively, and may generate an attractive force in a direction facing the second magnet 611 and the third magnet 613. For example, the pulling yoke 590 may generate an attractive force in a direction facing the optical axis (Z axis) of the second magnet 611 and the third magnet 613. Due to the attractive force, the third ball member B3 may maintain contact with the lens holder 230 and the bearing portion 300.

[0128] As described above, the camera module 1 according to the exemplary embodiment of the present disclosure is capable of 3-axis shake correction by the second driver 600 , and may have the following structure for accurate correction.

[0129] Figures 7 to 9 is a view illustrating a second driver according to an exemplary embodiment of the present disclosure.

[0130] Reference Figures 7 to 9 , the second driver 600 may include a first sub-driver and a second sub-driver.

[0131] The first sub-driver may include a second magnet 611 and a second coil 631, and the second magnet 611 and the second coil 631 may generate a driving force in the first axis (X axis) direction. In addition, the second sub-driver may include a third magnet 613 and a third coil 633, and the third magnet 613 and the third coil 633 may generate a driving force in the second axis (Y axis) direction.

[0132] However, the directions of the driving forces generated by the first sub-driver and the second sub-driver may be changed, and even when changed, the following description may be similarly applied.

[0133] The first sub-driver and the second sub-driver may include a position sensor for sensing the position of the lens module 200. For example, the first sub-driver may include a second position sensor 651 for sensing the first axis (X axis) position of the lens module 200, and the second sub-driver may include a third position sensor 653 for sensing the second axis (Y axis) position of the lens module 200.

[0134] The second position sensor 651 and the third position sensor 653 may be disposed to face polarity regions of the second magnet 611 and the third magnet 613 , respectively.

[0135] According to an exemplary embodiment of the present disclosure, the second position sensor 651 may be disposed closer to the lens center O (or the optical axis (Z axis)) than the third position sensor 653 .

[0136] In order to make a difference between the distance of the second position sensor 651 relative to the lens center O and the distance of the third position sensor 653 relative to the lens center O, the second magnet 611 may include polarity regions of different sizes. Specifically, the second magnet 611 may have one or more polarity regions magnetized to an N pole or an S pole in the longitudinal direction on one surface facing the second coil 631, and the areas of different polarity regions may have different sizes from each other.

[0137] Reference Figure 7 , the second magnet 611 may include a first polarity region 611a and a second polarity region 611b, the surface of the first polarity region 611a facing the second coil 631 is magnetized to an S pole or an N pole (the opposite surface thereof is magnetized to an N pole or an S pole), and the surface of the second polarity region 611b facing the second coil 631 is magnetized to an N pole or an S pole (the opposite surface thereof is magnetized to an S pole or an N pole). In addition, the second magnet 611 may include a neutral region 611c between the first polarity region 611a and the second polarity region 611b.

[0138] The area of ​​the first polarity zone 611a and the area of ​​the second polarity zone 611b may be different from each other, and the area of ​​the first polarity zone 611a may be greater than the area of ​​the second polarity zone 611b. For example, the length XS of the first polarity zone 611a may be longer than the length XN of the second polarity zone 611b. On the other hand, since the second magnet 611 has an asymmetric structure in which the areas of the first polarity zone 611a and the second polarity zone 611b are different from each other, the neutral zone 611c disposed between the first polarity zone 611a and the second polarity zone 611b may be disposed to be offset to one side relative to the lens center O, so that the first polarity zone 611a having a relatively large area may be disposed on an extension line extending in the first axis (X axis) direction while passing through the lens center O.

[0139] The second coil 631 may include two coils, and the two coils may face the first polarity region 611a and the second polarity region 611b, respectively. Since the first polarity region 611a and the second polarity region 611b have different areas, the sizes of the coils facing each polarity region may also be different from each other.

[0140] One second position sensor 651 may be provided, and the one second position sensor 651 may be provided inside a coil facing the first polarity region 611 a (ie, a polarity region having a large area) among the two coils included in the second coil 631 .

[0141] Meanwhile, the third magnet 613 may include a third polarity region 613a, a surface of the third polarity region 613a facing the third coil 633 being magnetized to an S pole or an N pole (its opposite surface being magnetized to an N pole or an S pole), and a surface of the fourth polarity region 613b facing the third coil 633 being magnetized to an N pole or an S pole (its opposite surface being magnetized to an S pole or an N pole). In addition, a neutral region 613c may be included between the third polarity region 613a and the fourth polarity region 613b.

[0142] The area of ​​the third polarity region 613a and the area of ​​the fourth polarity region 613b of the third magnet 613 may be substantially the same as each other. For example, the length YS of the third polarity region 613a may be the same as the length YN of the fourth polarity region 613b. Therefore, the neutral region 613c may be disposed on an extension line extending in the second axis (Y axis) direction while passing through the lens center O.

[0143] The third coil 633 may include two coils, and the two coils may face the third polarity region 613 a and the fourth polarity region 613 b , respectively.

[0144] Two third position sensors 653 may be provided, and the two third position sensors 653 may be provided inside two coils included in the third coil 633 , respectively.

[0145] according to Figure 7 In the embodiment shown in , the distance DX between the lens center O and the center of the second position sensor 651 may be shorter than the distance DY between the lens center O and the center of the third position sensor 653 .

[0146] When the second position sensor 651 is arranged closer to the lens center O, the second position sensor 651 can improve the error of the first axis (X axis) position of the lens module 200, specifically, improve the error of the first axis (X axis) position of the lens module 200 detected during rotation.

[0147] For example, the distance DX between the lens center O and the center of the second position sensor 651 may satisfy the following Equation 1.

[0148] Equation 1

[0149] 0≤DX <MX×0.2

[0150] Wherein MX is the length of the second magnet 611 .

[0151] Furthermore, when the third position sensor 653 is separated from the lens center O by a certain distance or more, the time required for shake correction can be reduced.

[0152] For example, a distance DY between the lens center O and the center of the third position sensor 653 may satisfy Equation 2 below.

[0153] Equation 2

[0154] DY>MY×0.2

[0155] Wherein MY is the length of the third magnet 613 .

[0156] Reference Figure 8 , the second magnet 711 may include a first polarity region 711a, and the surface of the first polarity region 711a facing the second coil 731 is magnetized to the N pole or the S pole (and the opposite surface thereof is magnetized to the S pole or the N pole). That is, the second magnet 711 may include only one polarity region on the surface facing the second coil 731, and the length MX of the second magnet 711 may be the same as the length XN of the first polarity region 711a. Similarly, even in the case of an embodiment in which the second magnet 711 includes only the first polarity region 711a on the surface facing the second coil 731, the areas of the first polarity region 711a and the second polarity region (not shown) may be different from each other and may correspond to an asymmetric structure.

[0157] Since the second magnet 711 includes only the first polarity region 711 a , the second coil 731 may include one coil facing the first polarity region 711 a .

[0158] In addition, the second position sensor 751 may be disposed within a coil.

[0159] The second sub-driver (third magnet 713 (third polarity region 713a, fourth polarity region 713b, neutral region 713c), third coil 733 and third position sensor 735) and Figure 7 The second sub-driver (third magnet 613 (third polarity region 613a, fourth polarity region 613b, neutral region 613c), third coil 633 and third position sensor 653) of the exemplary embodiment shown in FIG. 6 is the same, and a description thereof will be omitted.

[0160] according to Figure 8 In the exemplary embodiment shown in , the center of the second position sensor 751 can be set on an extension line extending in the first axis (X-axis) direction and passing through the lens center O, or on a straight line connecting the optical axis (Z-axis) and the side surface of the shell 110 at the shortest distance.

[0161] Reference Fig. 9 , the second magnet 811 may include two first polarity regions 811a and one second polarity region 811b, the surfaces of the two first polarity regions 811a facing the second coil 831 are magnetized to the S pole or the N pole (the opposite side thereof is magnetized to the N pole or the S pole), and the surface of the second polarity region 811b facing the second coil 831 is magnetized to the N pole or the S pole (the opposite side thereof is magnetized to the S pole or the N pole). The second polarity region 811b may be disposed between the two first polarity regions 811a. In addition, the second magnet 811 may include a neutral region 811c respectively between one first polarity region 811a and the second polarity region 811b and between the second polarity region 811b and another first polarity region 811a.

[0162] The areas of the first polarity region 811a and the second polarity region 811b may be different from each other, and Fig. 9 In an exemplary embodiment, the size of the area of ​​the second polarity region 811b may be larger than the size of the area of ​​the first polarity region 811a. For example, the length XN of the second polarity region 811b may be longer than the length XS of the first polarity region 811a.

[0163] The second coil 831 may include three coils, and the three coils may face the first polarity region 811a, the second polarity region 811b, and another first polarity region 811a, respectively. Since the first polarity region 811a and the second polarity region 811b have different areas, the sizes of the coils facing each polarity region may also be different from each other.

[0164] One second position sensor 851 may be provided, and the one second position sensor 851 may be provided inside a coil facing the second polarity region 811 b (ie, a polarity region having a large area) among the three coils included in the second coil 831 .

[0165] The second sub-driver (third magnet 813 (third polarity region 813a, fourth polarity region 813b, neutral region 813c), third coil 833 and third position sensor 853) and Figure 7 The second sub-driver (third magnet 613 (third polarity region 613a, fourth polarity region 613b, neutral region 613c), third coil 633 and third position sensor 653) of the exemplary embodiment shown in FIG. 6 is the same, and a description thereof will be omitted.

[0166] according to Fig. 9 In the exemplary embodiment shown in , the center of the second position sensor 851 can be set on an extension line extending in the first axis (X-axis) direction and passing through the lens center O, or on a straight line connecting the optical axis (Z-axis) and the side surface of the shell 110 at the shortest distance.

[0167] According to an embodiment of the present disclosure, an extension line extending in the first axis (X axis) direction while passing through the lens center O may pass through a polarity region having a large area among the polarity regions of the second magnets 611, 711, and 811 and a coil disposed to face the polarity region. Therefore, when the second position sensors 651, 751, and 851 are disposed inside the coils of the large polarity regions facing the second magnets 611, 711, and 811, the distance DX between the lens center O and the center of the second position sensors 651, 751, and 851 may be minimized.

[0168] As described above, according to the exemplary embodiment of the present disclosure, the camera module 1 has a three-axis shake correction function and can correct shake more accurately. In addition, since a ball member is provided in one level to guide shake correction, the thickness of the camera module 1 in the optical axis (Z axis) direction can be thinned.

[0169] Although specific examples have been shown and described above, it will be apparent after understanding the present disclosure that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are understood in a descriptive sense only and not for limiting purposes. The description of the features or aspects in each example should be considered to be applicable to similar features or aspects in other examples. If the described techniques are performed in a different order, and / or if the components in the described system, architecture, device or circuit are replaced or supplemented in a different manner and / or by other components or their equivalents, appropriate results can still be achieved. Therefore, the scope of the present disclosure is not limited by specific embodiments, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in the present disclosure.

Claims

1. A camera module, characterized in that: The camera module comprises: Lens module; A bearing portion, accommodating the lens module; a housing for accommodating the bearing portion; and a shake correction driver, comprising three or more position sensors, a plurality of magnets disposed on the lens module, and a plurality of coils disposed on the housing, wherein the shake correction driver is configured to form a driving force to move the lens module on a plane perpendicular to the optical axis, wherein at least one of the plurality of magnets faces two or more of the three or more position sensors, and Wherein, a position sensor facing one of the plurality of magnets is disposed closer to the optical axis than a position sensor facing another of the plurality of magnets.

2. The camera module according to claim 1, characterized in that: The three or more position sensors are disposed on a side surface of the housing, and Among the three or more position sensors, the center of the position sensor disposed closer to the optical axis is disposed on a straight line connecting the optical axis and the side surface of the housing at the shortest distance.

3. The camera module according to claim 1, wherein: Each of the plurality of magnets includes one or more polarity regions on a surface facing the coil, and Wherein, the plurality of coils are arranged to face the polarity regions of the plurality of magnets respectively.

4. The camera module according to claim 3, characterized in that: The three or more position sensors are disposed inside at least some of the plurality of coils.

5. The camera module according to claim 4, characterized in that: The plurality of magnets include: a first optical image stabilizing magnet including at least one of a first polarity region and a second polarity region on one surface facing the coil; and a second optical image stabilizing magnet including a third polarity region and a fourth polarity region on one surface facing the coil, The first polarity region and the second polarity region have different areas.

6. The camera module according to claim 5, characterized in that: Among the three or more position sensors, a position sensor facing the first optical image stabilizing magnet is disposed to face a polarity region having a larger area among the first polarity region and the second polarity region.

7. The camera module according to claim 5, characterized in that: The polarity region having a larger area between the first polarity region and the second polarity region is disposed closer to the optical axis than the other polarity regions.

8. The camera module according to claim 5, characterized in that: The first optical image stabilizing magnet faces one position sensor among the three or more position sensors, and the second optical image stabilizing magnet faces two position sensors among the three or more position sensors.

9. The camera module according to claim 5, characterized in that: The plurality of coils include: a first optical image stabilization coil facing the first optical image stabilization magnet; and a second optical image stabilizing coil, facing the second optical image stabilizing magnet, Wherein, the first optical image stabilization coil includes one coil or two or more coils of different sizes.

10. The camera module according to claim 1, wherein: The camera module further includes a plurality of ball members disposed between the lens module and the bearing portion. Wherein, the plurality of ball components are in single-point contact with the lens module and the bearing portion respectively.

11. The camera module according to claim 1, wherein: The camera module further includes a focus adjustment unit including a magnet disposed on the carrier, and a coil and a position sensor disposed in the housing to face the magnet.

12. A camera module, characterized in that The camera module comprises: A lens module; and a jitter correction driver configured to move the lens module in a plane perpendicular to the optical axis, Wherein, the jitter correction driver comprises: a first sub-driver, comprising: a first optical image stabilizing magnet and a first optical image stabilizing coil configured to form a first axial direction driving force in a first axial direction perpendicular to the optical axis; and a first position sensor facing the first optical image stabilizing magnet; and a second sub-driver, comprising: a second optical image stabilizing magnet and a second optical image stabilizing coil, configured to form a second axis direction driving force in a second axis direction perpendicular to the optical axis and the first axis direction; and two second position sensors facing the second optical image stabilizing magnet, The first optical image stabilizing magnet includes at least one of a first polarity region and a second polarity region having different areas on one surface facing the first optical image stabilizing coil.

13. The camera module according to claim 12, characterized in that: The first position sensor faces a polarity region having a larger area between the first polarity region and the second polarity region.

14. The camera module according to claim 12, wherein: The first position sensor is disposed closer to the optical axis than the second position sensor.

15. The camera module according to claim 12, wherein: The first optical image stabilization coil and the second optical image stabilization coil are provided in a number corresponding to the number of polarity regions included in the first optical image stabilization magnet and the second optical image stabilization magnet.

16. The camera module according to claim 12, characterized in that: The camera module further includes: a carrying portion, used to accommodate the lens module; and A plurality of ball members are disposed between the lens module and the bearing portion, so that the plurality of ball members are in single-point contact with the lens module and the bearing portion, respectively.

17. A camera module, characterized in that The camera module comprises: A lens barrel including one or more lenses disposed on an optical axis; a lens holder accommodating the lens barrel and configured to move in a plane perpendicular to the optical axis; a bearing portion, accommodating the lens holder and configured to move in the optical axis direction; and A jitter correction driver configured to move the lens holder relative to the carrier in the plane and comprising: a first optical image stabilizing magnet disposed on the lens holder; a first optical image stabilization coil disposed to face the first optical image stabilization magnet in a first direction in the plane; a second optical image stabilizing magnet disposed on the lens holder; and a second optical image stabilizing coil disposed to face the second optical image stabilizing magnet in a second direction perpendicular to the first direction in the plane, wherein the first optical image stabilizing magnet includes a first polarity region extending in the second direction and facing the first optical image stabilizing coil, wherein the second optical image stabilizing magnet includes a second polarity region extending in the first direction and facing the second optical image stabilizing coil, and Wherein, the area of ​​the first polarity region is greater than the area of ​​the second polarity region.

18. The camera module according to claim 17, wherein: The first optical image stabilization magnet further includes a third polarity region extending in the second direction and facing the first optical image stabilization coil, and an area of ​​the third polarity region is smaller than the area of ​​the first polarity region.

19. The camera module according to claim 17, wherein: The camera module further includes: a first optical image stabilization position sensor disposed in the first optical image stabilization coil and configured to detect a position of the first optical image stabilization magnet; and two or more second optical image stabilization position sensors disposed in the second optical image stabilization coil and configured to detect a position of the second optical image stabilization magnet, Wherein, the first optical image stabilization position sensor is arranged closer to the optical axis than the second optical image stabilization position sensor.

Images