Camera module

Abstract

The camera module includes: a lens module including at least one lens; a frame to which the lens module is coupled, and which is movable in a direction perpendicular to the optical axis; a bearing part in which the frame is accommodated; and a plurality of magnets disposed on the frame and a plurality of traction yokes disposed on the bearing portion to face each of the plurality of magnets. Each of the plurality of traction yokes includes a first direction extending portion extending in a longitudinal direction of the plurality of magnets and a second direction extending portion extending in a thickness direction of the plurality of magnets.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0052438, filed on April 19, 2024, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field

[0003] The following description pertains to the camera module. Background Technology

[0004] High-performance camera modules, which are similar in performance to traditional cameras, are used in mobile devices such as smartphones.

[0005] For example, camera modules used in mobile devices typically have autofocus, image stabilization, and zoom capabilities.

[0006] However, in the case of mobile devices, as the thickness of mobile devices gradually decreases, the space in which a camera module can be installed becomes more limited; therefore, a thinner camera module is desired.

[0007] The above information is presented as background information and is intended only to aid in understanding this disclosure. No determination is made, and no assertion is made, regarding whether any of the above content is applicable to the prior art relative to this disclosure. Utility Model Content

[0008] This summary portion is provided to briefly introduce the selection of concepts, which will be further described in the detailed description portion below. This summary portion is not intended to identify key or essential features of the claimed subject matter, nor is it intended to help determine the scope of the claimed subject matter.

[0009] In one general aspect, the camera module includes: a lens module including at least one lens; a frame to which the lens module is coupled, and the frame is movable in a direction perpendicular to the optical axis; a support portion in which the frame is housed; and a plurality of magnets and a plurality of traction yokes, the plurality of magnets being disposed on the frame and the plurality of traction yokes being disposed on the support portion to face each of the plurality of magnets. Each of the plurality of traction yokes includes a first directional extension extending in the longitudinal direction of the plurality of magnets and a second directional extension extending in the thickness direction of the plurality of magnets.

[0010] The plurality of magnets may include a first jitter correction magnet and a second jitter correction magnet disposed on different side surfaces perpendicular to each other on the frame. Either or both of the first jitter correction magnet and the second jitter correction magnet may have polarity regions disposed asymmetrically with respect to their longitudinal direction.

[0011] The first jitter correction magnet and the second jitter correction magnet may each include a first polarity region, a neutral region, and a second polarity region arranged along their longitudinal direction. The area of ​​the first polarity region may be equal to or greater than the area of ​​the second polarity region.

[0012] Each of the plurality of traction yokes may include a first portion facing a first polarity region and a second portion spaced apart from the first portion and facing a second polarity region. The length of the first portion in the longitudinal direction of the plurality of magnets may be longer than the length of the second portion in the longitudinal direction of the plurality of magnets.

[0013] The first part and the second part may each include a first direction extension portion and a second direction extension portion, respectively.

[0014] The second directional extension portion can be located at at least two ends of the multiple traction yokes in the longitudinal direction.

[0015] The camera module may also include a guide member disposed between the frame and the support to guide movement of the frame relative to the support. Multiple traction yokes may face multiple magnets along the optical axis, and the guide member is inserted between the multiple traction yokes and the multiple magnets.

[0016] The guide member may include multiple ball members, which are capable of rolling in any one or both of a first axial direction perpendicular to the optical axis and a second axial direction perpendicular to both the optical axis and the first axial direction.

[0017] The camera module may further include a first shake correction coil and a second shake correction coil, which are configured to face a first shake correction magnet and a second shake correction magnet respectively in a direction perpendicular to the optical axis. Each of the first and second shake correction coils may include multiple coils facing a first polarity region and a second polarity region respectively.

[0018] The coil facing the first polarity region among a plurality of coils may have a longer length than the coil facing the second polarity region among a plurality of coils.

[0019] The camera module may also include a position sensor configured to face the first polarity regions of the first jitter correction magnet and the second jitter correction magnet, respectively.

[0020] The number of position sensors can be set to correspond to the number of magnets.

[0021] In another general aspect, the camera module includes: a lens module including at least one lens; a frame to which the lens module is coupled, and the frame is movable in a direction perpendicular to the optical axis; a support portion in which the frame is housed; and a plurality of magnets and a plurality of traction yokes, the plurality of magnets being disposed on the frame, the plurality of traction yokes being spaced apart in the longitudinal direction of the plurality of magnets and disposed on the support portion. The plurality of magnets includes a first polarity region and a second polarity region having different areas along the longitudinal direction of the plurality of magnets.

[0022] The plurality of traction yokes may include a first portion facing a first polarity region and a second portion spaced apart from the first portion and facing a second polarity region. The first portion may have a length in the longitudinal direction of the plurality of magnets that is longer than the length of the second portion in the longitudinal direction of the plurality of magnets.

[0023] The plurality of traction yokes may further include: a first directional extension portion extending in the longitudinal direction of the plurality of magnets; and a second directional extension portion extending in the thickness direction of the plurality of magnets.

[0024] Multiple traction yokes may include a second directional extension at at least two ends in the longitudinal direction of the multiple traction yokes.

[0025] Other features and aspects will become apparent from the accompanying drawings and the detailed description below. Attached Figure Description

[0026] Figure 1 This is a perspective view of a camera module according to an embodiment of the present disclosure.

[0027] Figure 2 This is an exploded perspective view of a camera module according to an embodiment of the present disclosure.

[0028] Figure 3 This is an exploded perspective view of the focus adjustment portion according to an embodiment of the present disclosure.

[0029] Figure 4 This is an exploded perspective view of the jitter correction portion according to an embodiment of the present disclosure.

[0030] Figure 5 This is a perspective view of a jitter correction drive section according to an embodiment of the present disclosure.

[0031] Figure 6 This is a plan view of the jitter correction drive section according to an embodiment of the present disclosure.

[0032] Figure 7A It is along Figure 1 The cross-sectional view taken from line I-I'.

[0033] Figure 7B It is along Figure 1 The cross-sectional view taken from line II-II'.

[0034] Figure 8 A traction yoke according to an embodiment of the present disclosure is shown.

[0035] Figure 9 The arrangement relationship between the jitter correction magnet and the traction yoke according to an embodiment of the present disclosure is shown.

[0036] Figure 10A and Figure 10B This is a conceptual diagram illustrating the restoring force of a traction yoke according to an embodiment of the present disclosure.

[0037] Throughout the accompanying drawings and detailed embodiments, 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 dimensions, scale, and depiction of elements in the drawings may be exaggerated. Detailed Implementation

[0038] In the following description, although examples of this disclosure will be described in detail with reference to the accompanying drawings, it should be noted that the examples are not limited thereto.

[0039] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein, except for operations that must occur in a specific order, as will become apparent upon understanding this disclosure. Furthermore, for clarity and brevity, descriptions of features well-known in the art may be omitted.

[0040] 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 in which the methods, devices, and / or systems described herein will become apparent upon understanding this disclosure.

[0041] Throughout this specification, when an element such as a layer, region, or substrate is described as being "on," "connected to," or "attached to" another element, the element may be directly "on," directly "connected to," or directly "attached to" the other element, or there may be one or more other elements between the element and the other element. Conversely, when an element is described as being "directly on," "directly connected to," or "directly attached to" another element, there are no other elements between the element and the other element.

[0042] 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.

[0043] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited by these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, first part, first region, first layer, or first section mentioned in these examples may also be referred to as a second component, second part, second region, second layer, or second section.

[0044] Spatial relative terms such as “above,” “above,” “below,” and “under” may be used herein for descriptive convenience to describe the relationship of one element relative to another, as shown in the accompanying drawings. In addition to covering the orientation depicted in the drawings, these spatial relative terms are intended to also cover different orientations of the device in use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “above” another element would be located “below” or “under” that other element. Thus, 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 spatial relative terms used herein should be interpreted accordingly.

[0045] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the terms “a,” “an,” and “the” are intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0046] Due to manufacturing techniques and / or tolerances, the shapes shown in the accompanying drawings may vary. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include shape variations that occur during manufacturing.

[0047] It should be noted that in this document, the term "may" is used relative to examples, such as regarding what an example may include or implement, meaning that there exists at least one example that includes or implements such a feature, but not all examples are limited to this.

[0048] The features of the examples described herein can be combined in various ways that will become apparent upon understanding this disclosure. Furthermore, although the examples described herein have multiple configurations, other configurations that will become apparent upon understanding this disclosure are also possible.

[0049] Figure 1 This is a perspective view of a camera module according to an embodiment of the present disclosure.

[0050] The camera module 1000 according to embodiments of this disclosure can be used in a mobile device. For example, the mobile device can be a portable electronic device such as a smartphone, tablet PC, etc.

[0051] The camera module 1000 can be mounted on a mobile device such that the Z-axis direction (in the following text, the optical axis direction) based on the figures corresponds to the thickness direction of the mobile device.

[0052] Figure 2 This is an exploded perspective view of a camera module according to an embodiment of the present disclosure.

[0053] refer to Figure 2 The camera module 1000 may include a lens module 200, a lens driving device, an image sensor module 600, a housing 110, and a shell 120 for housing the lens module 200, etc.

[0054] The lens module 200 may include a lens barrel 210 having a hollow cylindrical shape and a plurality of lenses L mounted on the lens barrel 210.

[0055] Multiple lenses L can be mounted inside the lens barrel 210 along the optical axis (Z-axis direction). The multiple lenses L can be arranged in a desired number and can have the same or different optical properties.

[0056] The lens driving device can move the lens module 200. In one embodiment, the lens driving device may include a focus adjustment section 300 that moves the lens module 200 in the optical axis direction (Z-axis direction) (see [link]). Figure 3 ) and the jitter correction section 400 of the lens module 200 that moves in directions perpendicular to the optical axis (X-axis and Y-axis directions) (see Figure 4 ).

[0057] Image sensor module 600 may include image sensor 610 and a printed circuit board (hereinafter, sensor substrate) 620 on which image sensor 610 may be mounted.

[0058] The image sensor 610 can be electrically connected to the sensor substrate 620 via wire bonding or other means.

[0059] Image sensor 610 can convert light incident through lens module 200 into electrical signals. For example, image sensor 610 can be a CCD (charge-coupled device) or CMOS (complementary metal-oxide-semiconductor).

[0060] The electrical signal converted by the image sensor 610 can be output as an image or video through the display unit of the mobile device.

[0061] Although not shown in the accompanying drawings, the image sensor module 600 may also include a filter portion disposed on the upper side of the image sensor 610. For example, the filter portion may be an infrared blocking filter that blocks infrared light from incident on the image sensor 610.

[0062] The housing 110 can be a fixed body that forms the appearance of the camera module 1000. For example, the housing 110 can be a quadrilateral box shape with an internal space.

[0063] The lens module 200 and parts of the lens driving device can be movably housed within the internal space of the housing 110. That is, the lens module 200 and parts of the lens driving device can be movable.

[0064] Meanwhile, the image sensor module 600 and the remaining parts of the lens driving device can be fixedly connected to the housing 110.

[0065] The housing 120 can be attached to the housing 110 to cover the internal space. The housing 120 can be used to protect components housed in the internal space of the housing 110.

[0066] The housing 120 can also be used to shield electromagnetic waves. For this purpose, the housing 120 can be made of a metallic material and can be grounded to a grounding pad provided on the sensor substrate 620.

[0067] In addition, the camera module 1000 may include a stop 130.

[0068] The stop 130 can limit the range of movement of the component in the optical axis direction (Z-axis direction) and prevent the component from separating due to external impacts, etc. This will be described in detail later.

[0069] Figure 3 This is an exploded perspective view of the focus adjustment portion according to an embodiment of the present disclosure.

[0070] The focus adjustment section 300 can move the lens module 200 in the optical axis direction (Z-axis direction) to focus on the object.

[0071] The focus adjustment section 300 may include a support section 310 that houses the lens module 200 and a focus adjustment drive section (hereinafter, the first drive section) that generates a driving force to move the lens module 200 and the support section 310 along the optical axis direction (Z-axis direction).

[0072] The first driving part may be a voice coil motor including a first driving magnet 321 and a first driving coil 323.

[0073] The first driving magnet 321 may be disposed on the support portion 310. For example, the first driving magnet 321 may be disposed on a side surface of the support portion 310.

[0074] The first drive coil 323 may be disposed in the housing 110. For example, the first drive coil 323 may be disposed on a side surface of the housing 110 via a printed circuit board (hereinafter, motherboard) 500.

[0075] The first driving magnet 321 and the first driving coil 323 can face each other in a direction perpendicular to the optical axis (Z-axis).

[0076] The first driving magnet 321 and the first driving coil 323 can generate a driving force in a direction perpendicular to the direction in which the first driving magnet 321 and the first driving coil 323 face each other. For example, when electricity is applied to the first driving coil 323, the first driving magnet 321 and the first driving coil 323 can generate a driving force in the optical axis direction (Z-axis direction). Therefore, the support portion 310 can move back and forth in the optical axis direction (Z-axis direction).

[0077] The lens module 200 housed in the support portion 310 can move together with the support portion 310 in the optical axis direction (Z-axis direction).

[0078] The movement of the support unit 310 and the lens module 200 in the optical axis direction (Z-axis direction) can be a relative movement with respect to the housing 110.

[0079] Guide members 330a and 330b can be disposed between the support portion 310 and the housing 110.

[0080] The guide members 330a and 330b guide the movement of the bearing portion 310 in the optical axis direction (Z-axis direction), and reduce the friction between the bearing portion 310 and the housing 110 when the bearing portion 310 moves in the optical axis direction (Z-axis direction). For example, the guide members 330a and 330b can be in the shape of a ball (sphere).

[0081] The guide members 330a and 330b can be spaced apart in the length direction of the first driving magnet 321 and the first driving magnet 321 is inserted between the guide members 330a and 330b.

[0082] The first guide member 330a may be disposed on one longitudinal side of the first driving magnet 321, and the second guide member 330b may be disposed on the other longitudinal side of the first driving magnet 321.

[0083] The first guide member 330a and the second guide member 330b may include a plurality of balls disposed in the optical axis direction (Z-axis direction).

[0084] In one embodiment, the number of balls included in the first guide member 330a may be greater than the number of balls included in the second guide member 330b. In this case, the first guide member 330a may be a main guide member, and the second guide member 330b may be an auxiliary guide member.

[0085] When the first driving part generates driving force, the first guide member 330a and the second guide member 330b can roll in the optical axis direction (Z-axis direction).

[0086] The first guide member 330a and the second guide member 330b can be accommodated between guide grooves 311, 313, 111, 113 respectively provided in the support portion 310 and the housing 110, and can roll in the optical axis direction (Z-axis direction).

[0087] The guide grooves 311, 313, 111, and 113 may be in the form of the first guide member 330a and the second guide member 330b extending along their rolling optical axis direction (Z-axis direction).

[0088] The support portion 310 may include a first guide groove 311 disposed on one longitudinal side of the first drive magnet 321. The housing 110 may include a second guide groove 111 facing the first guide groove 311 in a direction perpendicular to the optical axis (Z-axis).

[0089] The first guide member 330a can be accommodated between the first guide groove 311 and the second guide groove 111.

[0090] In one embodiment, the plurality of balls included in the first guide member 330a can each make two-point contact with the first guide groove 311 and the second guide groove 111.

[0091] The support portion 310 may include a third guide groove 313 disposed on another longitudinal side of the first drive magnet 321. The housing 110 may include a fourth guide groove 113 facing the third guide groove 313 in a direction perpendicular to the optical axis (Z-axis).

[0092] The second guide member 330b can be accommodated between the third guide groove 313 and the fourth guide groove 113.

[0093] In an embodiment, the plurality of balls included in the second guide member 330b can each make two-point contact with one of the third guide groove 313 and the fourth guide groove 113, and make one-point contact with the other of the third guide groove 313 and the fourth guide groove 113.

[0094] The first yoke 327 may be disposed on a side surface of the housing 110. For example, the first yoke 327 may be disposed facing the first driving magnet 321 and the first driving coil 323 may be inserted between the first yoke 327 and the first driving magnet 321.

[0095] The first yoke 327 may be provided with a magnetic body. Therefore, the first yoke 327 can generate force with the first driving magnet 321.

[0096] In detail, the attraction force can be applied between the first yoke 327 and the first driving magnet 321 in the direction in which the first yoke 327 and the first driving magnet 321 face each other (i.e., in the direction perpendicular to the optical axis (Z axis)).

[0097] Therefore, the support portion 310 can be in close contact with the housing 110 in a direction perpendicular to the optical axis (Z-axis), and the support portion 310 and the housing 110 can maintain contact with the guide members 330a and 330b disposed between them.

[0098] Furthermore, the first yoke 327 and the first driving magnet 321 form a magnetic circuit, thereby concentrating the magnetic force generated from the first driving magnet 321.

[0099] In an embodiment, the length of the first yoke 327 in the optical axis direction (Z-axis direction) can be longer than the length of the first driving magnet 321 in the optical axis direction (Z-axis direction).

[0100] If the length of the first yoke 327 in the optical axis direction (Z-axis direction) is shorter than the length of the first driving magnet 321 in the optical axis direction (Z-axis direction), then when the support portion 310 moves in the optical axis direction (Z-axis direction), a stronger restoring force can be applied to the first driving magnet 321 to return it to its initial position, that is, the position where the center of the first driving magnet 321 faces the center of the first yoke 327. This results in an increase in the power consumption required for movement in the optical axis direction (Z-axis direction).

[0101] However, as in the embodiment, if the length of the first yoke 327 in the optical axis direction (Z-axis direction) is longer than the length of the first drive magnet 321 in the optical axis direction (Z-axis direction), the restoring force for returning the first drive magnet 321 to its initial position becomes relatively weak when the support portion 310 moves in the optical axis direction (Z-axis direction), thereby reducing the power consumption required for movement in the optical axis direction (Z-axis direction).

[0102] The camera module 1000 can use a closed-loop control method to detect the position of the optical axis (Z-axis direction) of the lens module 200 and provide feedback.

[0103] For this purpose, the first position sensor 325 may be mounted on the motherboard 500 facing the first drive magnet 321. For example, the first position sensor 325 may be a Hall sensor.

[0104] Furthermore, the motherboard 500 may be equipped with circuitry that provides drive signals to the focus adjustment section 300. For example, the circuitry may be a separate component or may be integrally formed with the first position sensor 325.

[0105] Figure 4 This is an exploded perspective view of the jitter correction portion according to an embodiment of the present disclosure.

[0106] The shake correction unit 400 can provide a relative displacement corresponding to the shake to the lens module 200 during imaging to correct image blur or video jitter caused by external factors such as user hand tremors. For example, the shake correction unit 400 can move the lens module 200 in a direction perpendicular to the optical axis (Z-axis) (X-axis and Y-axis directions).

[0107] The jitter correction section 400 may include a frame 410 in which the lens module 200 is disposed, and a jitter correction drive section (hereinafter referred to as the second drive section and the third drive section) that generates a driving force to move the lens module 200 and the frame 410 in a direction perpendicular to the optical axis (Z-axis) (X-axis direction and Y-axis direction). For example, the second drive section may generate a driving force to move the lens module 200 and the frame 410 in a first axial direction (X-axis direction) perpendicular to the optical axis (Z-axis), and the third drive section may generate a driving force to move the lens module 200 and the frame 410 in a second axial direction (Y-axis direction) perpendicular to the optical axis (Z-axis) and the first axis (X-axis).

[0108] The frame 410 can be housed in the support portion 310 while being combined with the lens module 200.

[0109] Meanwhile, the stop 130 can be combined with the support part 310 to cover the upper part of the frame 410.

[0110] Even in the event of an external impact, the frame 410 can remain connected to the load-bearing part 310 due to the stop 130.

[0111] Figure 5 This is a perspective view of a jitter correction drive section according to an embodiment of the present disclosure, and Figure 6 This is a plan view of the jitter correction drive section according to an embodiment of the present disclosure.

[0112] The second driving part can be a voice coil motor including a second driving magnet (or a first jitter correction magnet) 421 and a second driving coil (or a first jitter correction coil) 423. Furthermore, the third driving part can be a voice coil motor including a third driving magnet (or a second jitter correction magnet) 431 and a third driving coil (or a second jitter correction coil) 433.

[0113] The second driving magnet 421 and the third driving magnet 431 can be disposed on the frame 410. For example, the second driving magnet 421 and the third driving magnet 431 can be disposed on two mutually perpendicular side surfaces of the frame 410.

[0114] The second drive coil 423 and the third drive coil 433 can be disposed in the housing 110. For example, the second drive coil 423 and the third drive coil 433 can be disposed on two mutually perpendicular side surfaces of the housing 110 via the main board 500.

[0115] The second driving magnet 421 and the second driving coil 423 can face each other in a first axial direction (X-axis direction) perpendicular to the optical axis (Z-axis).

[0116] The second driving magnet 421 and the second driving coil 423 can generate driving force in opposite directions. For example, when power is applied to the second driving coil 423, the second driving magnet 421 and the second driving coil 423 can generate driving force in the first axial direction (X-axis direction). Therefore, the frame 410 can move back and forth in the first axial direction (X-axis direction).

[0117] The third driving magnet 431 and the third driving coil 433 can face each other in a second axis direction (Y axis direction) perpendicular to both the optical axis (Z axis) and the first axis (X axis).

[0118] The third driving magnet 431 and the third driving coil 433 can also generate driving force in opposite directions. For example, when power is applied to the third driving coil 433, the third driving magnet 431 and the third driving coil 433 can generate driving force in the second axial direction (Y-axis direction). Therefore, the frame 410 can move back and forth in the second axial direction (Y-axis direction).

[0119] The lens module 200, which is connected to the frame 410, can move together with the frame 410 in the first axial direction (X-axis direction) and the second axial direction (Y-axis direction).

[0120] The first axial direction (X-axis direction) movement and the second axial direction (Y-axis direction) movement of the frame 410 and the lens module 200 can be relative movements with respect to the support portion 310.

[0121] The second driving magnet 421 may include a first polarity region 421a and a second polarity region 421b disposed along the longitudinal direction of the second driving magnet 421. For example, the first polarity region 421a may be an N pole (or a S pole), and the second polarity region 421b may be an S pole (or an N pole). A neutral region 421c may be disposed between the first polarity region 421a and the second polarity region 421b.

[0122] The third driving magnet 431 may also have a first polarity region 431a, a neutral region 431c, and a second polarity region 431b arranged along the longitudinal direction of the third driving magnet 431.

[0123] In the implementation, the second driving magnet 421 and the third driving magnet 431 may have asymmetrically arranged polarity regions.

[0124] Specifically, the area or length of the first polar regions 421a and 431a may be different from the area or length of the second polar regions 421b and 431b.

[0125] For example, the first polar regions 421a and 431a may have a larger area or length than the second polar regions 421b and 431b. Therefore, the neutral regions 421c and 431c may be positioned offset from the optical axis (Z-axis) (i.e., the center of the lens).

[0126] At the same time, refer to Figure 5 The second driving magnet 421 and the third driving magnet 431 can be arranged symmetrically with respect to an imaginary line that passes between the second driving magnet 421 and the third driving magnet 431 while dividing the first axis (X-axis) and the second axis (Y-axis) into two halves. For example, the second driving magnet 421 and the third driving magnet 431 can be arranged such that the second polarity regions 421b and 431b can be adjacent to the imaginary line.

[0127] The second driving coil 423 may include a first coil 423a facing the first polarity region 421a of the second driving magnet 421 and a second coil 423b facing the second polarity region 421b of the second driving magnet 421. Similarly, the third driving coil 433 may include a third coil 433a facing the first polarity region 431a of the third driving magnet 431 and a fourth coil 433b facing the second polarity region 431b of the third driving magnet 431.

[0128] In an implementation, the first coil 423a and the third coil 433a facing the first polarity regions 421a and 431a may have different lengths than the second coil 423b and the fourth coil 433b facing the second polarity regions 421b and 431b.

[0129] For example, the first coil 423a and the third coil 433a can have lengths corresponding to the lengths of the first polarity regions 421a and 431a. The second coil 423b and the fourth coil 433b can have lengths corresponding to the lengths of the second polarity regions 421b and 431b. Therefore, the first coil 423a and the third coil 433a can have lengths longer than the second coil 423b and the fourth coil 433b.

[0130] The third guide member 430 may be disposed between the frame 410 and the support portion 310. For example, the third guide member 430 may be disposed between the surfaces of the frame 410 and the support portion 310 that face each other in the optical axis direction (Z-axis direction).

[0131] The third guide member 430 can guide the movement of the frame 410 in the first axial direction (X-axis direction) and the second axial direction (Y-axis direction). Furthermore, the third guide member 430 can maintain the gap between the frame 410 and the support portion 310. For example, the third guide member 430 can have a shape similar to a ball (sphere).

[0132] The third guide member 430 may include three or more balls. For example, the third guide member 430 may include four balls disposed at each corner portion of the frame 410 and the support portion 310.

[0133] Figure 7A It is along Figure 1 The cross-sectional view taken from line I-I'. Figure 7B It is along Figure 1 The cross-sectional view taken from line II-II'.

[0134] In this embodiment, the rolling direction of the third guide member 430 is not limited to a specific direction, and it can roll in both the first axial direction (X-axis direction) and the second axial direction (Y-axis direction). For example, when the second drive portion generates a driving force, the third guide member 430 can roll in the first axial direction (X-axis direction), and when the third drive portion generates a driving force, the third guide member 430 can roll in the second axial direction (Y-axis direction).

[0135] The third guide member 430 can be accommodated between guide grooves 415, 315 respectively provided in the frame 410 and the bearing part 310, and can roll in the first axial direction (X-axis direction) and the second axial direction (Y-axis direction).

[0136] The frame 410 may include a fifth guide groove 415 on its surface facing the support portion 310 in the optical axis direction (Z-axis direction). The support portion 310 may include a sixth guide groove 315 facing the fifth guide groove 415 in the optical axis direction (Z-axis direction).

[0137] The third guide member 430 can be accommodated between the fifth guide groove 415 and the sixth guide groove 315.

[0138] In one embodiment, the plurality of balls included in the third guide member 430 can each make point contact with the fifth guide groove 415 and the sixth guide groove 315. For example, when viewed in the first axial direction (X-axis direction) and the second axial direction (Y-axis direction), the fifth guide groove 415 and the sixth guide groove 315 can have flat surfaces that contact the plurality of balls. Furthermore, the fifth guide groove 415 and the sixth guide groove 315 can have a length in the first axial direction (X-axis direction) and the second axial direction (Y-axis direction) that is longer than the diameter of the plurality of balls.

[0139] Therefore, the third guide member 430 can move freely in the first axial direction (X-axis direction) and the second axial direction (Y-axis direction). Furthermore, the third guide member 430 can roll freely on a planar surface (XY plane) perpendicular to the optical axis (Z-axis).

[0140] In this way, if the third guide member 430 can have a structure that can roll in the first axial direction (X-axis direction) and the second axial direction (Y-axis direction), it can have the advantage of reducing the thickness of the camera module 1000 in the optical axis direction (Z-axis direction).

[0141] Meanwhile, in a configuration in which the third guide member 430, as in the embodiments of this disclosure, can move in both the first axial direction (X-axis direction) and the second axial direction (Y-axis direction), the lens module 200 may rotate about the optical axis (Z-axis) due to the undesirable application of unequal forces during the process of generating driving forces in the second drive portion and the third drive portion.

[0142] In this embodiment, the unwanted rotational force applied to the lens module 200 can be counteracted by the traction yoke 460 provided on the support portion 310.

[0143] Figure 8 A traction yoke according to an embodiment of the present disclosure is shown. Figure 9 The arrangement relationship between the jitter correction magnet and the traction yoke according to an embodiment of the present disclosure is shown. Figure 10A and Figure 10B This is a conceptual diagram illustrating the restoring force of a traction yoke according to an embodiment of the present disclosure.

[0144] The traction yoke 460 can be provided on the surface of the bearing part 310 facing the frame 410 in the optical axis direction (Z-axis direction).

[0145] In one embodiment, the traction yoke 460 can be inserted into the support portion 310. However, the traction yoke 460 can be manufactured separately from the support portion 310 and then attached to the support portion 310.

[0146] The traction yoke 460 can be configured to face the second drive magnet 421 and the third drive magnet 431.

[0147] The traction yoke 460 may be provided with a magnetic body. Therefore, the traction yoke 460 can generate an attractive force with the second driving magnet 421 and the third driving magnet 431.

[0148] In detail, the attractive force can be applied between the traction yoke 460 and the second driving magnet 421 and the third driving magnet 431 in the direction in which they face each other (i.e., in the optical axis direction (Z-axis direction)).

[0149] Therefore, the frame 410 can be tightly supported on the support portion 310 in the optical axis direction (Z-axis direction), and the frame 410 and the support portion 310 can maintain contact with the third guide member 430 disposed between the frame 410 and the support portion 310.

[0150] As described above, the traction yoke 460 can counteract unwanted rotational forces applied to the lens module 200.

[0151] In an embodiment, the traction yoke 460 may include a first portion 461 facing the first polarity regions 421a and 431a of the second drive magnet 421 and the third drive magnet 431, and a second portion 462 facing the second polarity regions 421b and 431b of the second drive magnet 421 and the third drive magnet 431.

[0152] The first part 461 and the second part 462 can be spaced apart from each other. For example, the first part 461 and the second part 462 can be spaced apart from each other based on neutral regions 421c and 431c.

[0153] In this implementation, the first portion 461 facing the first polarity regions 421a and 431a and the second portion 462 facing the second polarity regions 421b and 431b can have different lengths. For example, the first portion 461 can be longer than the second portion 462.

[0154] The traction yoke 460 can extend in a direction parallel to the longitudinal direction of the second drive magnet 421 and the third drive magnet 431.

[0155] In detail, the first part 461 and the second part 462 can extend as a whole in a direction (hereinafter referred to as the first direction) parallel to the longitudinal direction of the second driving magnet 421 and the third driving magnet 431.

[0156] The traction yoke 460 may include a portion extending in a direction parallel to the thickness direction of the second drive magnet 421 and the third drive magnet 431 to counteract the rotational force generated in the lens module 200.

[0157] Specifically, in some cases, the first portion 461 and the second portion 462 may be formed to extend in the thickness direction (hereinafter, the second direction) of the second driving magnet 421 and the third driving magnet 431. The first portion 461 and the second portion 462 may include a second direction extension portion P2 extending in the second direction.

[0158] In this embodiment, the longitudinal end of the traction yoke 460 may be a second-direction extension portion P2. Of the longitudinal ends of the traction yoke 460, one end may be a portion of the first portion 461, and the other end may be a portion of the second portion 462. The longitudinal end of the traction yoke 460 may substantially face the longitudinal ends of the second driving magnet 421 and the third driving magnet 431 in the optical axis direction (Z-axis direction).

[0159] Furthermore, the middle portion of the traction yoke 460 can also be the second direction extension portion P2. The middle portion of the traction yoke 460 can be a part of the first portion 461, and can be approximately facing the midpoint of the length direction of the second driving magnet 421 and the third driving magnet 431 in the optical axis direction (Z-axis direction).

[0160] The attraction between the traction yoke 460 and the second drive magnet 421 and the third drive magnet 431 can act toward the longitudinal center of the traction yoke 460. Therefore, when the traction yoke 460 only includes the first direction extension portion P1, there may be limitations in counteracting the rotational force applied to the lens module 200.

[0161] However, as in the embodiments of this disclosure, when the traction yoke 460 includes a second direction extension portion P2 at both ends, the attractive force is applied in opposite directions at the two ends of the second drive magnet 421 and the third drive magnet 431 in the longitudinal direction, such that the rotational force applied to the lens module 200 can be canceled out.

[0162] That is, the second direction extension P2 can be configured to overlap with the longitudinal ends of the second drive magnet 421 and the third drive magnet 431. When the lens module 200 may rotate, the longitudinal ends of the second drive magnet 421 and the third drive magnet 431 are not aligned with the traction yoke 460 in the optical axis direction (Z-axis direction). Since a strong restoring force can be applied to the corresponding part when the lens module 200 may rotate, the rotation of the lens module 200 can be effectively counteracted.

[0163] The camera module 1000 can use a closed-loop control method to detect the position of the lens module 200 in the first axis direction (X-axis direction) and the second axis direction (Y-axis direction) and provide feedback on the position of the lens module 200 in the first axis direction (X-axis direction) and the second axis direction (Y-axis direction).

[0164] Therefore, the second position sensor 425 can be mounted on the motherboard 500 facing the second drive magnet 421, and the third position sensor 435 can be mounted facing the third drive magnet 431. For example, the second position sensor 425 and the third position sensor 435 can be Hall effect sensors.

[0165] In one embodiment, the second position sensor 425 may be disposed on the inner side of the first coil 423a, which faces the first polarity region 421a of the second driving magnet 421. Furthermore, the third position sensor 435 may be disposed on the inner side of the third coil 433a, which faces the first polarity region 431a of the third driving magnet 431.

[0166] In one embodiment, a dashed line extending in the first axial direction (X-axis direction) while passing through the optical axis (Z-axis) can pass through the second position sensor 425, and a dashed line extending in the second axial direction (Y-axis direction) while passing through the optical axis (Z-axis) can pass through the third position sensor 435.

[0167] Therefore, the centers of the second position sensor 425 and the third position sensor 435 can be approximately aligned with the optical axis (Z-axis) (i.e., the center of the lens), and this is effective in accurately detecting the position of the lens module 200. By detecting the rotation of the lens module 200, jitter correction can be precisely controlled.

[0168] The motherboard 500 may be equipped with circuit elements that provide drive signals to the jitter correction section 400. For example, the circuit elements may be configured as two pieces, each of which may provide drive signals to the second drive section or the third drive section. Alternatively, the circuit elements may be configured as separate components or integrally formed with the second position sensor 425 and the third position sensor 435.

[0169] In this embodiment, the same driving signal can be input to the first coil 423a and the second coil 423b included in the second driving coil 423, and the same driving signal can be input to the third coil 433a and the fourth coil 433b included in the third driving coil 433.

[0170] The second yoke 427 and the third yoke 437 can be disposed on two mutually perpendicular sides of the housing 110. For example, the second yoke 427 can face the second driving magnet 421 and the second driving coil 423 can be inserted between the second yoke 427 and the second driving magnet 421, and the third yoke 437 can face the third driving magnet 431 and the third driving coil 433 can be inserted between the third yoke 437 and the third driving magnet 431.

[0171] The second yoke 427 and the third yoke 437 can concentrate the magnetic force generated from the second driving magnet 421 and the third driving magnet 431 to prevent leakage of the magnetic field.

[0172] One or more aspects of this disclosure are to provide a camera module with anti-rotation capabilities.

[0173] While specific examples have been shown and described above, it will be apparent upon understanding this 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 to be understood in a descriptive sense only and not for limiting purposes. The description of features or aspects in each example should be considered applicable to similar features or aspects in other examples. Suitable results may still be achieved if the described techniques are performed in a different order, and / or if components in the described system, architecture, apparatus, or circuit are combined in different ways and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of this disclosure is not limited by the 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 this disclosure.

Claims

1. A camera module characterized by, The camera module includes: a lens module including at least one lens; a frame to which the lens module is coupled and which is movable in a direction perpendicular to an optical axis; a bearing portion in which the frame is accommodated; and a plurality of magnets provided on the frame and a plurality of traction yokes provided on the bearing portion to face each of the plurality of magnets, wherein each of the plurality of traction yokes includes a first directionally extending portion extending in a longitudinal direction of the plurality of magnets and a second directionally extending portion extending in a thickness direction of the plurality of magnets.

2. The camera module according to claim 1, characterized in that, The plurality of magnets includes first and second shake correction magnets provided on different side surfaces of the frame perpendicular to each other, and wherein either one or both of the first and second shake correction magnets has a polarity region asymmetrically disposed with respect to a longitudinal direction thereof.

3. The camera module of claim 2, wherein, The first and second shake correction magnets each include a first polarity region, a neutral region, and a second polarity region disposed along the longitudinal direction thereof, and wherein an area of the first polarity region is equal to or greater than an area of the second polarity region.

4. The camera module of claim 3, wherein, Each of the plurality of traction yokes includes a first portion facing the first polarity region and a second portion spaced apart from the first portion and facing the second polarity region, and wherein a length of the first portion in the longitudinal direction of the plurality of magnets is longer than a length of the second portion in the longitudinal direction of the plurality of magnets.

5. The camera module of claim 4, wherein, The first and second portions include the first and second directionally extending portions, respectively.

6. The camera module of claim 1, wherein, The second directionally extending portion is disposed at least at both end portions of the plurality of traction yokes in the longitudinal direction.

7. The camera module of claim 1, wherein, The camera module further includes a guide member disposed between the frame and the bearing portion to guide movement of the frame relative to the bearing portion, wherein the plurality of traction yokes faces the plurality of magnets in an optical axis direction and the guide member is interposed between the plurality of traction yokes and the plurality of magnets.

8. The camera module of claim 7, wherein, The guide member includes a plurality of ball members rollable in either one or both of a first axis direction perpendicular to the optical axis direction and a second axis direction perpendicular to both the optical axis direction and the first axis direction.

9. The camera module of claim 3, wherein, The camera module further includes first and second shake correction coils disposed to face the first and second shake correction magnets, respectively, in a direction perpendicular to the optical axis, wherein the first and second shake correction coils each include a plurality of coils facing the first and second polarity regions, respectively.

10. The camera module of claim 9, wherein, The coils facing the first polarity region among the plurality of coils have a length longer than a length of the coils facing the second polarity region among the plurality of coils.

11. The camera module of claim 9, wherein, The camera module further includes a position sensor disposed to face the first polarity region of the first shake correction magnet and the second shake correction magnet, respectively.

12. The camera module of claim 11, wherein, The number of the position sensors is set to correspond to the number of the plurality of magnets.

13. A camera module characterized by, The camera module includes: a lens module including at least one lens; a frame to which the lens module is coupled and which is movable in a direction perpendicular to an optical axis; a bearing portion in which the frame is accommodated; and a plurality of magnets disposed on the frame and a plurality of traction yokes spaced apart in a longitudinal direction of the plurality of magnets and disposed on the bearing portion, wherein the plurality of magnets includes first and second polarity regions having different areas along the longitudinal direction of the plurality of magnets.

14. The camera module of claim 13, wherein, The plurality of traction yokes includes a first portion facing the first polarity region and a second portion spaced apart from the first portion and facing the second polarity region, and wherein the first portion has a length in the longitudinal direction of the plurality of magnets longer than a length of the second portion in the longitudinal direction of the plurality of magnets.

15. The camera module of claim 14, wherein, The plurality of traction yokes further includes: a first direction extension portion extending in the longitudinal direction of the plurality of magnets; and a second direction extension portion extending in a thickness direction of the plurality of magnets.

16. The camera module of claim 15, wherein, The plurality of traction yokes includes the second direction extension portion at least at both end portions in the longitudinal direction of the plurality of traction yokes.

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