CN212647223U - Camera module - Google Patents

Abstract

The application relates to a camera module, which comprises: a lens holder in which a lens module is accommodated; a housing accommodating therein the lens module and the lens holder; a shake correction unit including first and second magnets provided in the lens holder and first and second coils provided to face the first and second magnets; a focusing unit including a third magnet disposed in the lens module and a third coil disposed on a first substrate disposed on the lens holder; and a plurality of ball members configured to support movement of the lens module in a direction perpendicular to the optical axis. The lens module, the lens holder, the third magnet, and the third coil are moved together in a direction perpendicular to the optical axis by a driving force of the shake correction unit. The camera module according to the example disclosed in the present application can improve the focusing performance and the shake correction performance.

Description

Camera module

Cross Reference to Related Applications

This application claims the benefit of priority of korean patent application No. 10-2019-0100295, filed on 16.8.2019 to the korean intellectual property office, and korean patent application No. 10-2019-0178490, filed on 30.12.2019 to the korean intellectual property office, the entire disclosures of which are incorporated herein by reference for all purposes.

Technical Field

The present application relates to a camera module.

Background

Recently, camera modules have been used in mobile communication terminals such as tablet Personal Computers (PCs), laptop computers, and the like, as well as smart phones.

The camera module is provided with an actuator that moves the lens module to perform a focusing function and a shake correction function. The actuator moves the lens module in the optical axis direction and a direction perpendicular to the optical axis using the driving force generated by the magnet and the coil.

However, since the lens module moves in the optical axis direction during the focusing operation, the relative positions of the magnet and the coil for shake correction (the positions of the magnet and the coil in the optical axis direction) may also change.

When the relative positions of the magnet and the coil for shake correction (the positions of the magnet and the coil in the optical axis direction) are changed, it may be difficult to accurately control the driving force (the driving force in the direction perpendicular to the optical axis) generated by the magnet and the coil for shake correction.

The above information is presented merely as background information to aid in understanding the present disclosure. No determination is made as to whether any of the above can be used as prior art with respect to the present disclosure, nor is an assertion made.

SUMMERY OF THE UTILITY MODEL

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

In one general aspect, a camera module includes: a lens holder in which a lens module is accommodated; a housing accommodating therein the lens module and the lens holder; a shake correction unit including first and second magnets provided in the lens holder, and first and second coils provided to face the first and second magnets; a focusing unit including a third magnet disposed in the lens module, and a third coil disposed on a first substrate disposed on the lens holder; and a plurality of ball members configured to support movement of the lens module in a direction perpendicular to the optical axis. The lens module, the lens holder, the third magnet, and the third coil are moved together in a direction perpendicular to the optical axis by a driving force of the shake correction unit.

The first substrate is movable in a direction perpendicular to the optical axis by a driving force of the shake correction unit in a state where a part of the first substrate is connected to the housing.

The first substrate may include a body portion provided with the third coil and an extension portion bent to extend from the body portion.

The extension portion may include a first extension portion bent to extend from one side of the body portion so as to be spaced apart from the body portion, and a second extension portion bent to extend from the first extension portion.

The second extension portion may be disposed to be spaced apart from a side surface of the lens holder.

The second extension portion may include a connection portion configured to receive an electrical signal from an external component, and the connection portion may be disposed on the housing.

The first extending portion is movable in a second axial direction perpendicular to the optical axis by a driving force generated by the second magnet and the second coil.

The second extending portion is movable in a first axial direction perpendicular to the optical axis by a driving force generated by the first magnet and the first coil.

The lens module may include a lens barrel and a carrier coupled to the lens barrel, and the rolling member may be disposed between the carrier and the lens holder.

A stopper covering at least a part of the upper surface of the carrier may be provided on the lens holder.

The stopper may include a protrusion covering an upper portion of the rolling member.

The third coil may be disposed closer to the optical axis of the lens module than the first coil and the second coil.

The shake correction unit may further include a frame for guiding the movement of the lens module. The frame, the lens holder, and the lens module are movable together in a first axial direction perpendicular to the optical axis by a driving force generated by the first magnet and the first coil. The lens holder and the lens module are movable in a second axial direction perpendicular to the optical axis by a driving force generated by the second magnet and the second coil.

In another general aspect, a camera module includes: a lens holder in which a lens module is accommodated; a housing accommodating therein the lens module and the lens holder; a shake correction unit including first and second magnets provided in the lens holder, and first and second coils provided to face the first and second magnets; a focusing unit including a third magnet disposed in the lens module, and a third coil disposed on a first substrate disposed on the lens holder; and a plurality of ball members configured to support movement of the lens module in a direction perpendicular to the optical axis. The first substrate is moved in a direction perpendicular to the optical axis by a driving force of the shake correction unit in a state where a part of the first substrate is connected to the housing.

The lens module, the lens holder, the third magnet, and the third coil are movable together in a direction perpendicular to the optical axis by a driving force of the shake correction unit.

The first substrate may include a body portion provided with a third coil, a first extension portion bent to extend from one side of the body portion to be spaced apart from the body portion, and a second extension portion bent to extend from the first extension portion, and the first extension portion may be movable in a second axial direction perpendicular to the optical axis by a driving force generated by the second magnet and the second coil.

The second extending portion is movable in a first axial direction perpendicular to the optical axis by a driving force generated by the first magnet and the first coil.

In another general aspect, a camera module includes: a lens holder provided in the housing and configured to move in a first direction and a second direction perpendicular to the optical axis direction with respect to the housing; a lens module disposed in the lens holder and configured to move in an optical axis direction with respect to the lens holder; a base plate disposed on the lens holder, including a body portion configured to move together with the lens holder and a connection portion connected to the housing; and a driving coil provided on the main body portion to face the driving magnet on the lens module, thereby driving the lens module in the optical axis direction.

The substrate may include a first extension portion extending from a first curved portion connected to one side of the body portion to a second curved portion and a second extension portion extending from the second curved portion to the connection portion, the first extension portion may be configured to move in a first direction relative to the body portion and the second extension portion in response to movement of the lens holder in the first direction, and the second extension portion may be configured to move in a second direction relative to the first extension portion and the connection portion in response to movement of the lens holder in the second direction.

The camera module may further include first and second magnets disposed in the lens holder, and first and second coils disposed to face the first and second magnets to drive the lens holder in the first and second directions.

The camera module according to the example disclosed in the present application can improve the focusing performance and the shake correction performance.

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

Drawings

Fig. 1 is a perspective view of a camera module according to one or more examples.

Fig. 2 is a schematic exploded perspective view of a camera module according to one or more examples.

Fig. 3 is an exploded perspective view of a portion of a camera module according to one or more examples.

Fig. 4 is a plan view of one or more examples of the first substrate.

Fig. 5 and 6 are schematic views illustrating exemplary movement of the first substrate.

Like reference numerals refer to like elements throughout the drawings and detailed description. The figures may not be drawn to scale and the relative sizes, proportions and depictions of the elements in the figures may be exaggerated for clarity, illustration and convenience.

Detailed Description

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.

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatuses, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and/or systems described in this application will be apparent after understanding the present disclosure. For example, the order of operations described in this application is merely an example, and is not limited to the order set forth in this application, except to the extent that operations must occur in a particular order, but rather obvious variations are possible upon understanding the present disclosure. In addition, descriptions of features well known in the art may be omitted for the sake of clarity and conciseness.

The features described in this application may be embodied in different forms and should not be construed as limited to the examples described in this application. Rather, the examples described herein are provided merely to illustrate some of the many possible ways to implement the methods, apparatuses, and/or systems described herein, which will be apparent after understanding the present disclosure.

Throughout the specification, when an element such as a layer, region or substrate is described as being "on," "connected to" or "coupled to" another element, it can 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. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there may be no other elements intervening between the element and the other element. As used herein, a "portion" of an element can include the entire element or less than the entire element.

As used in this application, the term "and/or" includes any one of the associated listed items as well as any combination of any two or more items; similarly, "at least one of … …" includes any one of the associated listed items as well as any combination of any two or more items.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections are not limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, first component, first region, first layer, or first portion referred to in these examples may also be referred to as a second member, second component, second region, second layer, or second portion without departing from the teachings of the examples described in this application.

Spatially relative terms such as "above … …," "upper," "below … …," "lower," and the like may be used herein for descriptive convenience to describe one element's relationship to another element as illustrated in the figures. These spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "above … …" encompasses both orientations of "above and" below. The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used in this application should be interpreted accordingly.

The terminology used in the present application is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The articles "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and/or groups thereof.

The features of the examples described in this application may be combined in various ways that will be apparent after understanding the present disclosure. Further, while the examples described in this application have a variety of configurations, other configurations are possible as will be apparent after understanding the present disclosure.

It should be noted that in this application, the use of the term "may" with respect to an example, such as with respect to 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 so limited.

An aspect of the present disclosure is to provide a camera module capable of improving focusing performance and shake correction performance.

The present disclosure relates to a camera module that may be used in a portable electronic device such as a mobile communication terminal, a smart phone, or a tablet Personal Computer (PC).

Fig. 1 is a perspective view of a camera module according to one or more examples, and fig. 2 is a schematic exploded perspective view of the camera module of fig. 1.

Referring to fig. 1 and 2, the camera module 1 may include: a lens module 200; a lens driving device for moving the lens module 200; an image sensor module 700 for converting light incident thereon through the lens module 200 into an electrical signal; a housing 110 accommodating the lens module 200 and the lens driving apparatus therein; and a housing 130 coupled to the case 110.

The lens module 200 may include a lens barrel 210 and a carrier 230 (see fig. 3).

The lens barrel 210 may house at least one lens to capture a subject. When a plurality of lenses are arranged, the plurality of lenses may be mounted within the lens barrel 210 on the optical axis. The lens barrel 210 has a hollow cylindrical shape, and may be coupled to the carrier 230.

The lens module 200 may be received in a lens holder 300.

The lens driving apparatus may move the lens module 200.

As an example, the lens driving apparatus moves the lens module 200 in the optical axis (Z axis) direction to bring the lens into focus, and moves the lens module 200 in a direction perpendicular to the optical axis (Z axis) to correct a shake when capturing an image.

The lens driving apparatus may include a focusing unit 600 (see fig. 3) for focusing the lens and a shake correction unit 500 for correcting shake.

The image sensor module 700 is a device for converting light incident through the lens module 200 into an electrical signal.

As an example, the image sensor module 700 may include an image sensor 710 and a Printed Circuit Board (PCB)730 connected to the image sensor 710, and may further include an infrared filter.

The infrared filter cuts light in an infrared region among light incident thereon through the lens module 200.

The image sensor 710 converts light incident thereon through the lens module 200 into an electrical signal. As an example, the image sensor 710 may be a Charge Coupled Device (CCD) or a complementary metal oxide semiconductor device (CMOS).

The electrical signal converted by the image sensor 710 is output as an image through a display unit of the portable electronic device.

The image sensor 710 is fixed to the printed circuit board 730 and is electrically connected to the printed circuit board 730 by wire bonding.

The lens module 200 and the lens holder 300 are accommodated in the housing 110. As an example, the housing 110 has an open top and an open bottom, and the lens module 200 and the lens holder 300 are accommodated in the inner space of the housing 110.

The image sensor module 700 is disposed on the bottom of the case 110.

The outer case 130 is coupled to the case 110 to cover an outer surface of the case 110, and serves to protect internal components of the camera module 1.

Hereinafter, the shake correction unit 500 of the lens driving apparatus will be described with reference to fig. 2.

The shake correction unit 500 is used to correct image blur or moving picture shake due to hand shake or the like of a user when capturing an image or moving picture.

For example, when a shake occurs at the time of capturing an image due to hand shake of a user or the like, the shake correction unit 500 compensates for the shake by shifting the lens barrel 210 to make a relative shift corresponding to the shake.

As an example, the shake correction unit 500 moves the lens module 200 in a direction perpendicular to the optical axis (Z axis) to correct shake.

The shake correction unit 500 includes a frame 400 guiding the movement of the lens module 200, and a first magnet 510a and a first coil 510b and a second magnet 530a and a second coil 530b generating a driving force in a direction perpendicular to the optical axis (Z-axis).

The first magnet 510a and the first coil 510b are disposed to face each other in a first axial direction (X-axis direction) perpendicular to the optical axis (Z-axis), and the second magnet 530a and the second coil 530b are disposed to face each other in a second axial direction (Y-axis direction) perpendicular to the optical axis (Z-axis).

The frame 400 and the lens holder 300 are sequentially arranged in the housing 110 in the optical axis direction, and serve to guide the movement of the lens module 200. The lens module 200 is disposed in the lens holder 300.

The frame 400 and the lens holder 300 are moved in a direction perpendicular to the optical axis (Z-axis) with respect to the housing 110 by the driving force generated by the first magnet 510a and the first coil 510b and the second magnet 530a and the second coil 530 b.

The first magnet 510a and the first coil 510b generate a driving force in a first axis direction (X-axis direction) perpendicular to the optical axis (Z-axis), and the second magnet 530a and the second coil 530b generate a driving force in a second axis direction (Y-axis direction) perpendicular to the first axis (X-axis) and the optical axis (Z-axis). For example, the first magnet 510a and the first coil 510b generate a driving force in a direction in which they face each other, and the second magnet 530a and the second coil 530b also generate a driving force in a direction in which they face each other.

The second axis (Y-axis) is perpendicular to both the optical axis (Z-axis) and the first axis (X-axis).

The first and second magnetic bodies 510a and 530a are disposed to be orthogonal to each other in a plane perpendicular to the optical axis (Z-axis), and the first and second coils 510b and 530b are also disposed to be orthogonal to each other in a plane perpendicular to the optical axis (Z-axis).

The first and second magnets 510a and 530a are mounted on the lens holder 300.

The lens holder 300 has a first side surface 301, a second side surface 302, a third side surface 303 and a fourth side surface 304. The first side surface 301 and the second side surface 302 are perpendicular to each other, the third side surface 303 and the fourth side surface 304 are perpendicular to each other, the first side surface 301 and the third side surface 303 face each other, and the second side surface 302 and the fourth side surface 304 face each other.

The first magnet 510a is disposed on the first side surface 301 of the lens holder 300, and the second magnet 530a is disposed on the second side surface 302 of the lens holder 300.

The first and second coils 510b and 530b may be disposed on the second substrate 550. As an example, the first and second coils 510b and 530b may be disposed on a surface of the second substrate 550 facing the first and second magnets 510a and 530 a.

The second substrate 550 is mounted on the housing 110. For example, the second substrate 550 may be

A flat surface, and may be mounted on both side surfaces of the housing 110.

The housing 110 has four side surfaces, and of the four side surfaces, at least two side surfaces are provided with an opening 112 and an opening 113. The second substrate 550 is mounted on both side surfaces provided with the openings 112 and 113.

At the time of shake correction, the first magnet 510a and the second magnet 530a are movable members that move in a direction perpendicular to the optical axis (Z-axis) together with the lens holder 300, and the first coil 510b and the second coil 530b are fixed members that are fixed to the housing 110.

Since the lens module 200 is disposed in the lens holder 300, the lens module 200 moves in a direction perpendicular to the optical axis (Z-axis) together with the lens holder 300.

The camera module 1 is provided with a plurality of ball members for supporting the frame 400 and the lens holder 300. A plurality of ball members are used to guide the movement of the frame 400 and the lens holder 300 during the shake correction process. The plurality of ball members also serve to maintain the spacing between the housing 110 and the frame 400 and the lens holder 300.

Since the lens module 200 moves together with the lens holder 300 in a direction perpendicular to the optical axis (Z-axis), the movement of the lens module 200 can be supported by a plurality of ball members.

The plurality of ball members includes a first ball member B1 and a second ball member B2.

The first ball member B1 supports the movement of the frame 400 and the lens holder 300 in the first axial direction (X-axis direction), and the second ball member B2 supports the movement of the lens holder 300 in the second axial direction (Y-axis direction).

For example, when the driving force is generated in the first axis direction (X-axis direction), the first ball member B1 moves in a rolling motion in the first axis direction (X-axis direction). Therefore, the first ball member B1 guides the movement of the frame 400 and the lens holder 300 in the first axis direction (X-axis direction).

When the driving force is generated in the second axial direction (Y-axis direction), the second ball member B2 moves in the second axial direction (Y-axis direction) in a rolling motion. Therefore, the second ball member B2 guides the movement of the lens holder 300 in the second axis direction (Y axis direction).

The first ball member B1 includes a plurality of ball members disposed between the housing 110 and the frame 400, and the second ball member B2 includes a plurality of ball members disposed between the frame 400 and the lens holder 300.

The first guide groove portion 111 is formed in at least one of the surfaces of the housing 110 and the frame 400 that face each other in the optical axis direction (Z-axis direction), the first guide groove portion 111 accommodating therein the first ball member B1. The first guide groove portion 111 includes a plurality of guide grooves corresponding to the plurality of ball members of the first ball member B1, respectively.

The first ball member B1 is received in the first guide groove portion 111 and fitted between the housing 110 and the frame 400.

The movement of the first ball member B1 is restricted in the optical axis direction (Z-axis direction) and the second axis direction (Y-axis direction), and the first ball member B1 is movable only in the first axis direction (X-axis direction) in a state where the first ball member B1 is accommodated in the first guide groove portion 111. As an example, the first ball member B1 may move in a rolling motion only in the first axis direction (X-axis direction).

To achieve this, the planar shape of each of the plurality of guide grooves of the first guide groove portion 111 is a rectangular shape having a length in the first axis direction (X-axis direction).

The second guide groove portion 410 is formed in at least one of the surfaces of the frame 400 and the lens holder 300 that face each other in the optical axis direction (Z-axis direction), the second guide groove portion 410 accommodating therein the second ball member B2. The second guide groove portion 410 includes a plurality of guide grooves corresponding to the plurality of ball members of the second ball member B2, respectively.

The second ball member B2 is received in the second guide groove portion 410 and fitted between the frame 400 and the lens holder 300.

The movement of the second ball member B2 is restricted in the optical axis direction (Z-axis direction) and the first axis direction (X-axis direction), and the second ball member B2 is movable only in the second axis direction (Y-axis direction) in a state where the second ball member B2 is accommodated in the second guide groove portion 410. As an example, the second ball member B2 may move in a rolling motion only in the second axial direction (Y-axis direction).

To achieve this, the planar shape of each of the plurality of guide grooves of the second guide groove portion 410 is a rectangular shape having a length in the second axis direction (Y-axis direction).

When a driving force is generated in the first axis direction (X-axis direction), the frame 400, the lens holder 300, and the lens module 200 move together in the first axis direction (X-axis direction).

The first ball member B1 moves in a rolling motion in the first axis direction (X-axis direction). In this case, the movement of the second ball member B2 is restricted.

When a driving force is generated in the second axis direction (Y-axis direction), the lens holder 300 and the lens module 200 move in the second axis direction (Y-axis direction).

The second ball member B2 moves in the second axial direction (Y-axis direction) with a rolling motion. In this case, the movement of the first ball member B1 is restricted.

Since the third magnet 610 is mounted on the lens module 200 and the third coil 620 is mounted on the lens holder 300, the third magnet 610 and the third coil 620 move in a direction perpendicular to the optical axis (Z-axis) together with the lens module 200 and the lens holder 300 by the driving force of the shake correction unit 500.

In the examples described in this application, a closed-loop control manner of detecting and feeding back the position of the lens module 200 may be used in the shake correction process.

Therefore, the position sensors 510c and 530c are provided to perform closed-loop control. Two position sensors 510c and 530c are provided, and the two position sensors 510c and 530c are respectively provided in hollow portions formed in the centers of the first and second coils 510b and 530b to face the first and second magnets 510a and 530 a. The position sensors 510c and 530c may be hall sensors.

The first yoke 810 and the second yoke 830 are provided to maintain the shake correcting unit 500 and the first ball member B1 and the second ball member B2 in contact with each other.

The first yoke 810 and the second yoke 830 are fixed to the housing 110 and are disposed to face the first magnet 510a and the second magnet 530a, respectively, in the optical axis direction (Z-axis direction).

Therefore, attractive forces are generated in the optical axis direction (Z-axis direction) between the first yoke 810 and the first magnet 510a and between the second yoke 830 and the second magnet 530 a.

Since the lens holder 300 and the frame 400 are pressed toward the first yoke 810 and the second yoke 830 by the attractive force between the first yoke 810 and the first magnet 510a and the attractive force between the second yoke 830 and the second magnet 530a, the frame 400 and the lens holder 300 are maintained in a state of contacting each other.

The first and second yokes 810 and 830 are formed of a material that generates attractive force between the first yoke 810 and the first magnet 510a and between the second yoke 830 and the second magnet 530 a. As an example, the first yoke 810 and the second yoke 830 may be formed of a magnetic material.

Fig. 3 is an exploded perspective view of a portion of a camera module according to one or more examples.

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

Hereinafter, the focusing unit 600 of the lens driving apparatus will be described with reference to fig. 3.

The lens driving apparatus moves the lens module 200 to focus the lens on the object.

As an example, the camera module 1 includes a focusing unit 600 for moving the lens module 200 in the optical axis direction (Z-axis direction).

The lens module 200 includes a lens barrel 210 and a carrier 230.

The focusing unit 600 includes a lens holder 300 in which the lens module 200 is accommodated, and a third magnet 610 and a third coil 620 for generating a driving force to move the lens module 200 in an optical axis direction (Z-axis direction).

The third magnet 610 is mounted on the lens module 200. As an example, the third magnet 610 may be mounted on a side surface of the carrier part 230.

The third coil 620 is disposed on the first substrate 650. As an example, the third coil 620 is disposed on a surface of the first substrate 650. The first substrate 650 is mounted on the fourth side surface 304 of the lens holder 300 such that the third magnet 610 and the third coil 620 face each other in a direction perpendicular to the optical axis (Z-axis).

The fourth side surface 304 of the lens holder 300 is provided with an opening 305, and the first substrate 650 is mounted on the fourth side surface 304 provided with the opening 305.

Since the third coil 620 is disposed on the first substrate 650 mounted on the side surface of the lens holder 300 and the first and second coils 510b and 530b are disposed on the second substrate 550 mounted on the side surface of the housing 110, the third coil 620 may be disposed closer to the optical axis of the lens module 200 than the first and second coils 510b and 530 b.

When the lens is brought into focus, the third magnet 610 is a movable member that is mounted on the lens module 200 and moves in the optical axis direction (Z-axis direction), and the third coil 620 is a fixed member that is fixed to the lens holder 300.

When power is applied to the third coil 620, the lens module 200 moves in the optical axis direction (Z-axis direction) by electromagnetic interaction between the third magnet 610 and the third coil 620.

The rolling member B3 is disposed between the lens holder 300 and the lens module 200, for example, between the lens holder 300 and the carrier 230, to reduce friction between the lens holder 300 and the lens module 200 when the lens module 200 moves. The rolling member B3 may have a spherical shape.

The rolling members B3 are disposed on opposite sides of the third magnet 610.

The yoke 660 is disposed to face the third magnet 610 in a direction perpendicular to the optical axis (Z-axis). As an example, the yoke 660 is mounted on the other surface of the first substrate 650. Accordingly, the yoke 660 is disposed to face the third magnet 610 with the third coil 620 interposed between the yoke 660 and the third magnet 610.

An attractive force acts between the yoke 660 and the third magnet 610 in a direction perpendicular to the optical axis (Z-axis).

Therefore, the rolling member B3 is maintained in a state of being held in contact with the lens holder 300 and the lens module 200 by the attractive force between the yoke 660 and the third magnet 610.

In addition, the yoke 660 serves to concentrate the magnetic force of the third magnet 610. Therefore, generation of leakage magnetic flux can be prevented.

As an example, the yoke 660 and the third magnet 610 form a magnetic circuit.

In the examples described herein, a closed loop control approach that detects and feeds back the position of the lens module 200 may be used.

Therefore, the position sensor 630 is provided to perform closed-loop control. The position sensor 630 is disposed in a hollow portion formed in the center of the third coil 620 to face the third magnet 610. The position sensor 630 may be a hall sensor. A driver Integrated Circuit (IC)640 may be mounted on a surface of the first substrate 650.

The stopper 310 is coupled to the lens holder 300 to cover at least a portion of the upper surface of the carrier 230.

The stopper 310 may prevent the lens module 200 from being separated to the outside of the lens holder 300 due to external impact or the like.

The carrier 230 is provided with one or more shock-absorbing members 231. As an example, one or more shock-absorbing members 231 may be disposed on an upper surface of the carrier 230. The shock-absorbing member 231 is an elastic material. As an example, the shock-absorbing member 231 may be formed of a rubber material. The shock-absorbing member 231 can reduce impact and collision noise generated when the bearing part 230 collides with the stopper 310.

The stopper 310 has a protrusion 311 covering the upper portion of the rolling member B3. Therefore, the rolling member B3 is prevented from separating outside the lens holder 300.

Fig. 4 is a plan view of one or more examples of the first substrate, and fig. 5 and 6 are schematic diagrams illustrating exemplary movement of the first substrate.

The first substrate 650 may be mounted on the lens holder 300 and may move in a direction perpendicular to the optical axis (Z-axis) together with the lens holder 300. A part of the first substrate 650 is connected to the housing 110, and the first substrate 650 is moved in a direction (Z-axis direction) perpendicular to the optical axis by a driving force of the shake correction unit 500 in a state where the part of the first substrate 650 is connected to the housing 110.

The first substrate 650 may be a flexible circuit board, and includes a body portion 651, an extension portion, and a connection portion 652.

The third coil 620 is disposed on one surface of the body portion 651, and the yoke 660 is disposed on the other surface of the body portion 651. The body portion 651 is mounted on the fourth side surface 304 provided with the opening 305 among the side surfaces of the lens holder 300.

The extension portion is bent to extend from the body portion 651. The extension portion includes a first extension portion 655 and a second extension portion 659. The first extension portion 655 is bent to extend from one side of the body portion 651, and the second extension portion 659 is bent to extend from the first extension portion 655.

The first extension portion 655 is disposed to be spaced apart from the other surface of the body portion 651, and the body portion 651 and the first extension portion 655 are connected by a first bent portion 653. The first bent portion 653 may be bent in a "U" shape to connect one side end of the main body portion 651 and one side end of the first extending portion 655 to each other.

The first extension portion 655 has a length greater than the body portion 651. As an example, the length of the first extension portion 655 in the direction perpendicular to the optical axis (Z-axis) is larger than the length of the body portion 651 in the direction perpendicular to the optical axis (Z-axis).

The second extension portion 659 is disposed to be spaced apart from the third side surface 303 of the lens holder 300, and the second extension portion 659 and the first extension portion 655 are connected by a second curved portion 657. The second bent portion 657 is bent to connect the other side end of the first extension portion 655 and one side end of the second extension portion 659 to each other. The other side end of the second extension 659 is mounted on the housing 110.

The connection portion 652 is provided on the other side end of the second extension portion 659. For example, the connection portion 652 may extend in a downward direction (a direction toward the printed circuit board 730) from the other side end of the second extension portion 659.

The connection portion 652 may be configured to receive electrical signals from an external component (e.g., a printed circuit board 730).

The first substrate 650 is connected to the printed circuit board 730 through the connection portion 652.

The connection portion 652 is inserted into a side surface of the housing 110. The connecting portion 652 is provided in the groove portion 114 to be mounted on the housing 110.

During the shake correction, the first substrate 650 may move in a direction perpendicular to the optical axis (Z-axis) together with the lens holder 300.

In addition, during shake correction, the lens module 200, the lens holder 300, the third magnet 610, and the third coil 620 may move together in a direction perpendicular to the optical axis (Z-axis).

In a state where the connection portion 652 is connected to the printed circuit board 730, when the lens holder 300 is moved in a direction perpendicular to the optical axis (Z-axis), the first substrate 650 is moved in a direction perpendicular to the optical axis (Z-axis).

When a driving force is generated in the first axis direction (X-axis direction), the lens holder 300 moves in the first axis direction (X-axis direction), and the first substrate 650 mounted on the lens holder 300 moves in the first axis direction (X-axis direction) together with the lens holder 300.

The second extension portion 659 is bent from the first extension portion 655 to be spaced apart from the third side surface 303 of the lens holder 300. Therefore, when the driving force is generated in the first axis direction (X-axis direction), the second extending portion 659 moves in the first axis direction (X-axis direction) to significantly reduce the tension applied to the first substrate 650 (see fig. 5).

When a driving force is generated in the second axis direction (Y-axis direction), the lens holder 300 moves in the second axis direction (Y-axis direction), and the first substrate 650 mounted on the lens holder 300 moves in the second axis direction (Y-axis direction) together with the lens holder 300.

The first extension portion 655 is bent from the body portion 651 to be spaced apart from another surface of the body portion 651. Therefore, when the driving force is generated in the second axis direction (Y-axis direction), the first extension portion 655 moves in the second axis direction (Y-axis direction) to significantly reduce the tension applied to the first substrate 650 (see fig. 6).

The camera module 1 according to the example described in the present application is configured such that even when the lens module 200 moves in the optical axis direction (Z-axis direction) during the focusing operation, the relative positions of the first magnet 510a and the first coil 510b (the positions of the first magnet 510a and the first coil 510b in the optical axis direction (Z-axis direction)) and the relative positions of the second magnet 530a and the second coil 530b (the positions of the second magnet 530a and the second coil 530b in the optical axis (Z-axis) direction) do not change. Therefore, the driving force for shake correction can be accurately controlled.

Further, during the shake correction operation, even when the lens module 200 is moved in the direction perpendicular to the optical axis (Z-axis), the relative positions of the third magnet 610 and the third coil 620 (the positions of the third magnet 610 and the third coil 620 in the direction perpendicular to the optical axis (Z-axis)) do not change. Therefore, the driving force for the focusing operation can be accurately controlled.

As described above, the camera module according to the example disclosed in the present application can improve the focusing performance and the shake correction performance.

While specific examples have been illustrated 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 in this application are to be considered in a descriptive sense only and not for purposes of limitation. 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 systems, architectures, devices, or circuits are combined in a different manner and/or replaced or supplemented by other components or their equivalents. Therefore, the scope of the present disclosure should be defined not by the specific embodiments but by the claims and their equivalents, and all modifications within the scope of the claims and their equivalents should be understood as being included in the present disclosure.

Claims (20)

1. A camera module, characterized in that the camera module comprises:

a lens holder in which a lens module is accommodated;

a housing in which the lens module and the lens holder are accommodated;

a shake correction unit including first and second magnets provided in the lens holder and first and second coils provided to face the first and second magnets;

a focusing unit including a third magnet disposed in the lens module and a third coil disposed on a first substrate disposed on the lens holder; and

a plurality of ball members configured to support movement of the lens module in a direction perpendicular to an optical axis,

wherein the lens module, the lens holder, the third magnet, and the third coil are moved together in the direction perpendicular to the optical axis by a driving force of the shake correction unit.

2. The camera module according to claim 1, wherein the first substrate is moved in the direction perpendicular to an optical axis by the driving force of the shake correction unit in a state where a part of the first substrate is connected to the housing.

3. The camera module according to claim 1, wherein the first substrate includes a main body portion provided with the third coil and an extension portion bent to extend from the main body portion.

4. The camera module according to claim 3, wherein the extension portion includes a first extension portion bent to extend from a side of the body portion so as to be spaced apart from the body portion, and a second extension portion bent to extend from the first extension portion.

5. The camera module of claim 4, wherein the second extending portion is disposed spaced apart from a side surface of the lens holder.

6. The camera module of claim 4, wherein the second extension portion includes a connection portion configured to receive an electrical signal from an external component, and the connection portion is disposed on the housing.

7. The camera module according to claim 4, wherein the first extending portion is moved in a second axis direction perpendicular to the optical axis by a driving force generated by the second magnet and the second coil.

8. The camera module according to claim 7, wherein the second extending portion is moved in a first axial direction perpendicular to the optical axis by a driving force generated by the first magnet and the first coil.

9. The camera module according to claim 1, wherein the lens module includes a lens barrel and a carrier connected to the lens barrel, and

wherein a rolling member is disposed between the carrier and the lens holder.

10. The camera module according to claim 9, characterized in that a stopper covering at least a part of an upper surface of the carrier part is provided on the lens holder.

11. The camera module of claim 10, wherein the stop comprises a protrusion that covers an upper portion of the rolling member.

12. The camera module according to claim 1, wherein the third coil is disposed closer to an optical axis of the lens module than the first coil and the second coil.

13. The camera module according to claim 1, characterized in that the shake correction unit further comprises a frame for guiding movement of the lens module,

wherein the frame, the lens holder, and the lens module are moved together in a first axial direction perpendicular to the optical axis by a driving force generated by the first magnet and the first coil, and

wherein the lens holder and the lens module are moved in a second axial direction perpendicular to the optical axis by a driving force generated by the second magnet and the second coil.

14. A camera module, characterized in that the camera module comprises:

a lens holder in which a lens module is accommodated;

a housing in which the lens module and the lens holder are accommodated;

a shake correction unit including first and second magnets provided in the lens holder and first and second coils provided to face the first and second magnets;

a focusing unit including a third magnet disposed in the lens module and a third coil disposed on a first substrate disposed on the lens holder; and

a plurality of ball members configured to guide movement of the lens module in a direction perpendicular to an optical axis,

wherein the first substrate is moved in the direction perpendicular to the optical axis by a driving force of the shake correction unit in a state where a part of the first substrate is connected to the housing.

15. The camera module according to claim 14, wherein the lens module, the lens holder, the third magnet, and the third coil are moved together in the direction perpendicular to the optical axis by the driving force of the shake correction unit.

16. The camera module according to claim 14, wherein the first substrate includes a body portion provided with the third coil, a first extension portion bent to extend from one side of the body portion so as to be spaced apart from the body portion, and a second extension portion bent to extend from the first extension portion, and

wherein the first extending portion is moved in a second axial direction perpendicular to the optical axis by a driving force generated by the second magnet and the second coil.

17. The camera module according to claim 16, wherein the second extending portion is moved in a first axial direction perpendicular to the optical axis by a driving force generated by the first magnet and the first coil.

18. A camera module, characterized in that the camera module comprises:

a lens holder provided in a housing and configured to move in a first direction and a second direction perpendicular to an optical axis direction with respect to the housing;

a lens module disposed in the lens holder and configured to move in the optical axis direction with respect to the lens holder;

a base plate disposed on the lens holder, including a body portion configured to move together with the lens holder and a connection portion connected to the housing; and

a driving coil provided on the body portion to face a driving magnet on the lens module to drive the lens module in the optical axis direction.

19. The camera module according to claim 18, wherein the substrate includes a first extending portion extending from a first bent portion connected to one side of the body portion to a second bent portion, and a second extending portion extending from the second bent portion to the connecting portion;

wherein the first extension portion is configured to move in the first direction relative to the body portion and the second extension portion in response to movement of the lens support in the first direction, an

Wherein the second extension portion is configured to move in the second direction relative to the first extension portion and the connection portion in response to movement of the lens holder in the second direction.

20. The camera module of claim 18, further comprising first and second magnets disposed in the lens holder and first and second coils disposed to face the first and second magnets to drive the lens holder in the first and second directions.

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