Patent Description:
<CIT> discloses a camera system having a first camera unit and a second camera unit. The first camera unit includes an autofocus actuator, which includes a first plurality of magnets for autofocus motion control of components of a first optical package. The first plurality of magnets is positioned to generate magnetic fields aligned in parallel with a first magnetic axis at a right angle to the optical axis of the first optical package. The second camera unit includes an optical image stabilization and autofocus actuator. The optical image stabilization and autofocus actuator includes a second plurality of magnets positioned to generate magnetic fields aligned along a second magnet axis at <NUM>-degrees to the first magnetic axis. <CIT> discloses a dual-optical module autofocus plus optical image stabilization camera. <CIT> discloses a voice coil motor array module. It comprise a carrier frame, a plurality of magnetic components, a plurality of displacement components, an elastic member and a cover. The voice coil motor array module is used for driving a plurality of lenses to displace so that a clear image may be captured.

The following description provides background information for the present embodiment and does not describe the prior art.

As various portable terminals are widely spread and commonly used, and wireless Internet services has been commercialized, the demands of consumers related to portable terminals have been diversified and various kinds of additional devices have been installed in portable terminals.

As a typical example among them, there is a camera module for taking a picture or a video of a subject. Meanwhile, in recent years, a dual camera module in which two camera modules are arranged side by side has been studied.

However, in the dual camera module of the prior art, the distances between the camera modules are narrow and there is a problem that mutual magnetic field interference occurs.

The present embodiment is intended to provide a structure capable of eliminating mutual interference between the magnets in a structure of a lens driving device for dual OIS.

Furthermore, in order to secure the magnetic force of the magnet for AF driving in the above-mentioned structure, a structure for securing the length of the magnet in z-axis direction is provided.

The first coil may comprises a first coil unit facing the second magnet unit, and a second coil unit facing the third magnet unit.

The first coil further comprises a connecting portion connecting the first coil unit and the second coil unit, wherein the connecting portion of the first coil may be disposed between the first magnet unit and the bobbin or disposed between the dummy member and the bobbin.

The first coil comprises a first coil unit facing the second magnet unit in a horizontal direction, and a second coil unit facing the third magnet unit in the horizontal direction, wherein the second coil may comprise a third coil unit facing the first magnet unit in a vertical direction, a fourth coil unit facing the second magnet unit in the vertical direction, and a fifth coil unit facing the third magnet unit in the vertical direction.

The substrate comprises a hole, wherein the hole of the substrate may be formed closer to one side surface of the substrate adjacent to the dummy member.

The second magnet unit and the third magnet unit move the bobbin in the optical axis direction, and the first magnet unit, the second magnet unit, and the third magnet unit may move the housing in a direction perpendicular to the optical axis direction.

Each of the second magnet unit and the third magnet unit comprises a first surface facing the first coil, wherein the first surface may have two polarities.

Each of the first magnet unit to the third magnet unit comprises a second surface facing the second coil, wherein the second surface may have two polarities.

The first coil comprises a plurality of coil units, and the plurality of coil units may comprise a first coil unit facing the second magnet unit and a second coil unit facing the third magnet unit.

The coil unit may not be disposed between the bobbin and the first magnet unit.

The coil unit may not be disposed between the bobbin and the dummy member.

The first magnet unit may be a <NUM>-pole magnet, and the second magnet unit and the third magnet unit may be <NUM>-pole magnets.

A dummy member disposed on the second side part of the housing may be included.

The second coil may not be disposed between the dummy member and the substrate.

The dummy member may comprise a non-magnetic material.

The first coil further comprises a connecting portion connecting the first coil unit and the second coil unit, and the connecting portion of the first coil may be disposed between the first magnet unit and the bobbin or disposed between the dummy member and the bobbin.

The substrate may comprise a hole, and the hole of the substrate may be formed closer to one side surface of the substrate.

The one side surface of the substrate may be adjacent to the dummy member.

The shortest distance from the other side surface, located at the opposite side of the one side surface of the substrate, to the hole may be larger than the shortest distance from the one side surface to the hole.

The first coil may comprise a first coil unit facing the second magnet unit in a horizontal direction, and a second coil unit facing the third magnet unit in the horizontal direction, and the second coil comprises a third coil unit facing the first magnet unit in a vertical direction, a fourth coil unit facing the second magnet unit in the vertical direction, and a fifth coil unit facing the third magnet unit in the vertical direction.

The first coil unit and the second coil unit may have at least any one shape among an elliptical shape, a track shape, and a closed curve shape.

The second magnet unit and the third magnet unit move the bobbin in the optical axis direction, and the first magnet unit, the second magnet unit, and the third magnet unit move the housing in a direction perpendicular to the optical axis direction.

The bobbin comprises a first protrusion and a second protrusion disposed at the opposite side of the first protrusion, wherein the first coil unit is disposed to surround the first protrusion, and the second coil unit may be disposed to surround the second protrusion.

The lens driving device comprises: an upper elastic member disposed on the bobbin and coupled to the bobbin and the housing; and a support member coupled to the upper elastic member and the substrate, wherein the first coil unit and the second coil unit are electrically connected, and the upper elastic member comprises a first upper elastic unit and a second upper elastic unit that are spaced apart from each other, wherein one side end portion of the first coil unit is coupled to the first upper elastic unit and one side end portion of the second coil may be coupled to the second upper elastic unit.

Each of the first to third magnet units comprises a second surface facing the second coil, wherein the second surface may have two polarities.

The camera module according to the present embodiment may comprise the first lens driving device and a second lens driving device adjacent to the first lens driving device.

The second lens driving device is disposed adjacent to a fourth side part of the housing of the first lens driving device, and the second lens driving device comprises a housing; a bobbin disposed in the housing of the second lens driving device; a third coil disposed on an outer circumferential surface of the bobbin of the second lens driving device; a magnet disposed in the housing of the second lens driving device and facing the third coil; and a fourth coil facing the magnet of the second lens driving device, wherein the magnet of the second lens driving device may comprise four magnet units disposed at the corner portions of the housing of the second lens driving device.

The upper surface of the magnet further comprises a second portion overlapped with the housing in the direction of the optical axis and not overlapped with the upper elastic member in the direction of the optical axis, wherein an upper plate of the housing may be disposed above the second portion of the upper surface of the magnet.

The first portion of the upper surface of the magnet may be in contact with the upper elastic member.

In the dual camera module, the first lens driving device may further comprise a cover coupled to the base and accommodating the housing therein, and a stopper protruding toward the upper plate of the cover may be disposed on the upper plate of the housing.

The housing comprises a first side part disposed on the first surface side of the first lens driving device, a second side part disposed on the opposite side of the first side, and a second side part disposed between the first side part and the second side part, wherein the magnet may comprise a first magnet disposed on a second side part of the housing, a second magnet disposed on a third side part of the housing, and a third magnet disposed on the second side part of the housing, and a third magnet disposed on the fourth side part.

A dummy member having a mass corresponding to the first magnet may be disposed on the first side part of the housing.

The top plate of the housing may be disposed on each of the second side part, the third side part and the fourth side part and may not be disposed on the first side part.

A dummy member comprising a non-magnetic material may be disposed on the first side part of the housing.

The number of turns of the coil wound on the third coil unit may correspond to the number of turns of the coil wound on the second coil unit.

The center axis of the bobbin may be disposed eccentrically from the center axis of the first lens driving device toward the direction of the dummy member.

The substrate may comprise a through hole corresponding to a lens coupled to the bobbin, and the through hole may be eccentrically disposed toward a first surface of the first lens driving device.

The substrate comprises a through hole, an inner circumferential surface formed by the through hole, a first side surface disposed on the first side part of the housing, and a second side surface disposed on the second side part of the housing, wherein the first coil unit is disposed between the inner circumferential surface of the substrate and the second side surface of the substrate and the second coil may not be disposed between the inner circumferential surface of the substrate and the first side surface of the substrate.

The substrate comprises a first side surface disposed on the first surface side of the first lens driving device, a second side surface disposed on the opposite side of the first side surface, and a third side surface and a fourth side surface disposed between the first side surface and the second side surface that are disposed on the opposite side from each other, wherein the distance between the third side surface and the fourth side surface may be longer than the distance between the first side surface and the second side surface.

The second coil comprises a first coil unit facing the first magnet, a second coil unit facing the second magnet, and a third coil unit facing the third magnet, wherein the length of the first coil unit in the lengthwise direction may be longer than the length in the lengthwise direction of each of the second coil unit and the third coil unit.

The second lens driving device comprises a housing; a bobbin disposed in the housing of the second lens driving device; a first coil disposed in the bobbin of the second lens driving device; a magnet disposed in the housing of the second lens driving device and facing the first coil of the second lens driving device; a base disposed below the housing of the second lens driving device; and a substrate disposed on the base of the second lens driving device, the second coil comprising a second coil facing the magnet of the second lens driving device, wherein the magnet of the second lens driving device may comprise four corner magnets disposed at four corner portions disposed between four side parts of the housing of the second lens driving device.

Through the present embodiment, the mutual interference between the magnets in a structure of a lens driving device for dual OIS can be minimized.

Further, in the above-mentioned structure, a magnetic force for AF driving can be secured.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to some embodiments described.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are merely intended to distinguish the components from other components, and the terms do not limit the nature, order or sequence of the components.

When a component is described as being "connected," "coupled," or "jointed" to another component, the component may be directly connected, coupled, or jointed to the other component, however, it should be understood that another element may be "connected," or "coupled" between components.

The "optical axis direction" used below is defined as the optical axis direction of the lens module in a state of being coupled to the lens driving device. On the other hand, "optical axis direction" can be corresponding to "vertical direction," "z-axis," and the like.

The "autofocus function" used below is defined as a function that automatically matches the focus on a subject by adjusting the distance to the image sensor by moving the lens module along the optical axis according to the distance of the subject so that a clear image of the subject can be obtained on the image sensor. On the other hand, "auto focus" can be used in combination with "auto focus (AF)".

The "camera shake correction function" used below is defined as a function of moving or tilting the lens module in the direction perpendicular to the optical axis direction so as to cancel the vibration (motion) generated in the image sensor by an external force. On the other hand, "camera shake correction" can be used in combination with "optical image stabilization (OIS)".

Hereinafter, the configuration of an optical device according to this embodiment will be described with reference to the drawings.

<FIG> is a perspective view of an optical device according to the present embodiment.

The optical device may be any one among a mobile phone, a mobile phone, a smart phone, a portable smart device, a digital camera, a laptop computer, a digital broadcast terminal, a personal digital assistants (PDA), a portable multimedia player (PMP). However, the type of the optical device is not limited thereto, and any device for photographing the image or the photograph may be referred to as an optical device.

The optical device may comprise a main body <NUM>. The main body <NUM> can form the appearance of an optical device. The main body <NUM> can accommodate the camera module <NUM>. The display unit <NUM> may be disposed on one side of the main body <NUM>. For example, the display unit <NUM> and the camera module <NUM> are disposed on one surface of the main body <NUM>, and the camera module <NUM> is further disposed on the other surface (a surface located at the opposite side of one surface) of the main body <NUM>.

The optical device may comprise a display unit <NUM>. The display unit <NUM> may be disposed on one side of the main body <NUM>. The display unit <NUM> can output the image photographed by the camera module <NUM>.

The optical device may comprise a camera module <NUM>. The camera module <NUM> may be disposed in the main body <NUM>. At least a part of the camera module <NUM> can be accommodated inside the main body <NUM>. A plurality of camera modules <NUM> may be provided. The camera module <NUM> can be disposed on one surface of the main body <NUM> and on the other surface of the main body <NUM>, respectively. The camera module <NUM> can take an image of a subject. In this embodiment, a dual camera module may be applied to the camera module <NUM> of the optical device.

Hereinafter, the configuration of a dual camera module according to the present embodiment will be described with reference to the drawings.

<FIG> is a perspective view illustrating a dual camera module according to the present embodiment.

The dual camera module may comprise a first camera module and a second camera module. The dual camera module may comprise a first lens driving device <NUM> and a second lens driving device <NUM>. The first camera module may comprise a first lens driving device <NUM>. The second camera module may comprise a second lens driving device <NUM>. In this embodiment, each of the first and second lens driving devices <NUM> and <NUM> may perform an autofocus function and/or a camera shake correction function. That is, in this embodiment, the first and second lens driving devices <NUM> and <NUM> may be an 'optical image stabilization module (OIS module)', an 'OIS actuator', or an 'AF actuator'. The dual camera module may comprise a first lens driving device <NUM> comprising a first surface and a second lens driving device <NUM> comprising a second surface facing the first surface. The first surface may be one surface of the cover <NUM> of the first lens driving device <NUM> which will be described later and the second surface may be a surface of the cover <NUM> of the second lens driving device <NUM> which will be described later. The dual camera module may comprise a first and a second lens driving devices <NUM> and <NUM> arranged side by side on the printed circuit board <NUM>. In another embodiment, the printed circuit board <NUM> may be separated so that the first lens driving device <NUM> is disposed on the first printed circuit board and the second lens driving device <NUM> is disposed on the second printed circuit board.

The dual camera module may comprise a lens module. The lens module may comprise at least one lens. The lens module may comprise a lens and a barrel. The lens module may comprise a first lens module coupled to the first lens driving device <NUM> and a second lens module coupled to the second lens driving device <NUM>. The first lens module may be coupled to the bobbin <NUM> of the first lens driving device <NUM>. The first lens module may be coupled to the bobbin <NUM> by screws and/or adhesives. The first lens module can be moved integrally with the bobbin <NUM>. The second lens module may be coupled to the bobbin <NUM> of the second lens driving device <NUM>. The second lens module may be coupled to the bobbin <NUM> by screws and/or adhesives. The second lens module can be moved integrally with the bobbin <NUM>.

The dual camera module may comprise a filter. The filter may comprise an infrared filter. The infrared filter can block the light of the infrared region from entering into the image sensor. An infrared filter may be disposed between the lens module and the image sensor. The infrared filter comprises a first infrared filter disposed below the lens coupled to the first lens driving device <NUM> and a second infrared filter disposed below the lens coupled to the second lens driving device <NUM>. For example, the infrared filter may be disposed in the sensor bases <NUM> and <NUM>. In another example, an infrared filter may be disposed in bases <NUM> and <NUM>.

The dual camera module may comprise a printed circuit board <NUM>. The first lens driving device <NUM> and the second lens driving device <NUM> may be disposed on the printed circuit board <NUM>. At this time, the first sensor base <NUM> may be disposed between the printed circuit board <NUM> and the first lens driving device <NUM>. A second sensor base <NUM> may be disposed between the printed circuit board <NUM> and the second lens driving device <NUM>. The printed circuit board <NUM> may be electrically connected to the first and second lens driving devices <NUM> and <NUM>. An image sensor may be disposed on the printed circuit board <NUM>. The printed circuit board <NUM> may be electrically connected to the image sensor.

The dual camera module may comprise an image sensor. The image sensor may be disposed on the printed circuit board <NUM>. The image sensor can be electrically connected to the printed circuit board <NUM>. In one example, the image sensor may be coupled to the printed circuit board <NUM> by surface mounting technology (SMT). As another example, the image sensor may be coupled to the printed circuit board <NUM> by a flip chip technique. The image sensor comprises a first image sensor disposed on the lower side of the lens coupled to the first lens driving device <NUM> and a second image sensor disposed on the lower side of the lens coupled to the second lens driving device <NUM>. The image sensor can be disposed so that the lens and the optical axis coincide. That is, the optical axis of the image sensor and the optical axis of the lens can be aligned. The image sensor can convert the light irradiated to the effective image area of the image sensor into an electrical signal. The image sensor may be any one among a charge coupled device (CCD), a metal oxide semiconductor (MOS), a CPD, and a CID.

The dual camera module may comprise a control unit. The control unit may be disposed on the printed circuit board <NUM>. The control unit can individually control the direction, intensity, and amplitude of the current supplied to a first coil <NUM> and a second coil <NUM> of the first lens driving device <NUM>. The control unit can individually control the direction, intensity, and amplitude of the current supplied to a first coil <NUM> and a second coil <NUM> of the second lens driving device <NUM>. The control unit may control the first and second lens driving devices <NUM> and <NUM> to perform the autofocus function and/or the camera shake correction function. Further, the control unit may perform autofocus feedback control and/or camera shake correction feedback control for the first and second lens driving devices <NUM> and <NUM>.

Hereinafter, the configuration of the first lens driving device will be described with reference to the drawings.

<FIG> is a perspective view illustrating a state in which the cover of each of the first lens driving device and the second lens driving device according to the present embodiment is removed; <FIG> is a perspective view illustrating the arrangement structure of magnets, coils, and dummy members of each of the first lens driving device and the second lens driving device according to the present embodiment; <FIG> is an exploded perspective view of the first lens driving device according to the present embodiment; <FIG> is an exploded perspective view of the first mover of the first lens driving device according to the present embodiment; <FIG> is an exploded perspective view of the second mover of the first lens driving device according to the present embodiment; <FIG> is an exploded perspective view of the stator of the first lens driving device according to the present embodiment; <FIG> is an exploded perspective view of the elastic member of the first lens driving device according to the present embodiment; <FIG> is a cross-sectional view of the first lens driving device according to the present embodiment; <FIG> is a cross-sectional view of a part of the first lens driving device according to the present embodiment; <FIG> is a plan view of a part of the first lens driving device according to the present embodiment; <FIG> is a diagram illustrating a magnetic field distribution of a magnet of a dual camera module according to a comparative example; and <FIG> is a diagram illustrating the magnetic field distribution of the magnet of the dual camera module according to the present embodiment.

The first lens driving device <NUM> may be a voice coil motor (VCM). Further, the first lens driving device <NUM> may be an OIS, and may be an OIS for Dual OIS.

The first lens driving device <NUM> may comprise a cover <NUM>. The cover <NUM> can be coupled to the base <NUM>. The cover <NUM> accommodates a housing <NUM> inside. The cover <NUM> may form the appearance of the first lens driving device <NUM>. The cover <NUM> may be in the form of a hexahedron with a lower surface opened. The cover <NUM> may be a non-magnetic material. The cover <NUM> may be formed of a metal material. The cover <NUM> may be formed of a metal plate. The cover <NUM> may be connected to the ground portion of the printed circuit board <NUM>. Through this, the cover <NUM> can be grounded. The cover <NUM> may shield electromagnetic interference (EMI). At this time, the cover <NUM> may be referred to as an EMI shield can.

The cover <NUM> may comprise an upper plate <NUM> and a side plate <NUM>. The cover <NUM> may comprise an upper plate <NUM> and a side plate <NUM> extending downward from an outer periphery or edge of the upper plate <NUM>. The lower end of the side plate <NUM> of the cover <NUM> may be disposed at a stepped portion <NUM> of the base <NUM>. The inner surface of the side plate <NUM> of the cover <NUM> can be coupled to the base <NUM> by an adhesive.

The upper plate <NUM> of the cover <NUM> may comprise a hole <NUM>. The hole <NUM> may be formed in the upper plate <NUM> of the cover <NUM>. The hole <NUM> can expose the lens upward. The hole <NUM> may be formed in a size and shape corresponding to the lens. The size of the hole <NUM> may be larger than the diameter of the lens module so that the lens module can be inserted and assembled through the hole <NUM>. The light introduced through the hole <NUM> can pass through the lens. At this time, the light passing through the lens can be converted into an electrical signal in the image sensor and can be obtained as an image.

The first lens driving device <NUM> may comprise a first mover <NUM>. The first mover <NUM> can be coupled to the lens. The first mover <NUM> can be coupled to a second mover <NUM> through an elastic member <NUM>. The first mover <NUM> can be moved through the interaction with the second mover <NUM>. At this time, the first mover <NUM> can be moved integrally with the lens. On the other hand, the first mover <NUM> can be moved during AF driving. At this time, the first mover <NUM> may be referred to as an 'AF mover'. However, the first mover <NUM> can be moved even during OIS driving.

The first mover <NUM> may comprise a bobbin <NUM>. The bobbin <NUM> may be disposed in or on the inside of the housing <NUM>. The bobbin <NUM> may be disposed in a hole <NUM> of the housing <NUM>. The bobbin <NUM> may be movably coupled to the housing <NUM>. The bobbin <NUM> can be moved in the direction of the optical axis with respect to the housing <NUM>. A lens may be coupled to the bobbin <NUM>. The bobbin <NUM> and the lens may be coupled by a screw-coupling and/or an adhesive. The first coil <NUM> is coupled to the bobbin <NUM>. An upper elastic member <NUM> is coupled to the upper part or upper surface of the bobbin <NUM>. A lower elastic member <NUM> may be coupled to the lower part or lower surface of the bobbin <NUM>. The bobbin <NUM> may be coupled to the elastic member <NUM> by thermal welding and/or an adhesive. The adhesive for coupling the bobbin <NUM> and the lens and the bobbin <NUM> and the elastic member <NUM> may be an epoxy which is cured by at least one among ultraviolet (UV), heat, and laser.

The bobbin <NUM> may comprise a hole <NUM>. The hole <NUM> can penetrate the bobbin <NUM> in the optical axis direction. The lens module can be accommodated in the hole <NUM>. For example, a thread corresponding to a thread formed on the outer circumferential surface of the lens module may be formed on the inner circumferential surface of the bobbin <NUM> forming the hole <NUM>.

The bobbin <NUM> may comprise a protrusion <NUM>. The protrusion <NUM> may be disposed on the side surface of the bobbin <NUM>. The protrusion <NUM> may protrude from the side surface of the bobbin <NUM> and may be integrally formed. The first coil <NUM> may be wound on the protrusion <NUM>. Alternatively, the first coil <NUM> already wound on the protrusion <NUM> can be coupled. The protrusion <NUM> may comprise a first protrusion <NUM> and a second protrusion. The bobbin <NUM> may comprise the first protrusion <NUM> disposed on a first side surface of the bobbin <NUM> and the second protrusion disposed on a second side surface disposed at the opposite side of the first side surface of the bobbin <NUM>. Each of the first protrusion <NUM> and the second protrusion may be divided into two protrusions. Alternatively, each of the first protrusion <NUM> and the second protrusion may be formed in a straight line without being separated. The first protrusion <NUM> can be wound with a first coil unit <NUM>. The second protrusion may be wound with a second coil unit <NUM>.

The first mover <NUM> may comprise a first coil <NUM>. The first coil <NUM> may be disposed on the bobbin <NUM>. The first coil <NUM> may be disposed between the bobbin <NUM> and the housing <NUM>. The first coil <NUM> may be disposed on the outer circumferential surface of the bobbin <NUM>. The first coil <NUM> may be wound directly on the bobbin <NUM>. The first coil <NUM> may face a magnet <NUM>. The first coil <NUM> can be electromagnetically interacted with the magnet <NUM>. In this case, when an electric current is supplied to the first coil <NUM> and an electromagnetic field is formed around the first coil <NUM>, electromagnetic interaction between the first coil <NUM> and the magnet <NUM> causes the first coil <NUM> to be moved with respect to the magnet <NUM>. The first coil <NUM> may be a single coil formed integrally.

The first coil <NUM> may comprise two end portions for supplying power. At this time, one end portion of the first coil <NUM> is coupled to a first upper elastic unit 1510a and the other end portion of the first coil <NUM> may be coupled to a second upper elastic unit 1510b. That is, the first coil <NUM> can be electrically connected to the upper elastic member <NUM>. In detail, the first coil <NUM> can be supplied with power sequentially via the printed circuit board <NUM>, a substrate <NUM>, a support member <NUM>, and the upper elastic member <NUM>. As a modified embodiment, the first coil <NUM> may be electrically connected to the lower elastic member <NUM>.

The first coil <NUM> may comprise a first coil unit <NUM> and a second coil unit <NUM> which are spaced apart from each other. The first coil <NUM> may comprise a first coil unit <NUM> facing a second magnet unit <NUM> and a second coil unit <NUM> facing a third magnet unit <NUM>. The first coil unit <NUM> and the second coil unit <NUM> may be disposed spaced apart from each other on the opposite side of the outer side surface of the bobbin <NUM>. The first coil unit <NUM> may be wound around the first protrusion <NUM> so as to surround the upper surface and the lower surface of the first protrusion <NUM>. The first coil unit <NUM> may be inserted into the first protrusion <NUM> and the second coil unit <NUM> may be inserted into the second protrusion. The second coil unit <NUM> can be wound on the second protrusion to surround the upper surface and the lower surface of the second protrusion. The first coil unit <NUM> and the second coil unit <NUM> may be referred to as a 'spectacle coil'. The first coil unit <NUM> and the second coil unit <NUM> may have a shape of at least one among elliptical shape, a track shape, and a closed curve shape.

The first coil <NUM> may not face the first magnet unit <NUM> of the magnet <NUM>. More in detail, the first coil <NUM> faces only the second magnet unit <NUM> and the third magnet unit <NUM> of the magnet <NUM>, but may not face the first magnet unit <NUM>. The first coil unit <NUM> is disposed so as to face the second magnet unit <NUM> while the second coil unit <NUM> is disposed so as to face the third magnet unit <NUM>, however, any sub-structure of the first coil <NUM> facing the first magnet unit <NUM>, may not be disposed.

The first coil <NUM> may comprise a connecting portion (not shown) for electrically connecting the first coil unit <NUM> and the second coil unit <NUM>. The connecting portion of the first coil <NUM> may be a connecting coil (not shown). One end of the first coil unit <NUM> and one end of the second coil unit <NUM> may be connected to the connecting portion of the first coil <NUM>. The connecting portion of the first coil <NUM> may be disposed between the first coil unit <NUM> and the second coil unit <NUM>. The connecting portion of the first coil <NUM> may face the first magnet unit <NUM>. In other embodiments, the connecting portion of the first coil <NUM> may face a dummy member <NUM>. The connecting portion of the first coil <NUM> may be disposed between the first magnet unit <NUM> and the bobbin <NUM> or between the dummy member <NUM> and the bobbin <NUM>.

The distance between the first coil unit <NUM> and the second magnet unit <NUM> and/or the distance between the second coil unit <NUM> and the third magnet unit <NUM> (refer to L1 in <FIG>) may be <NUM> to <NUM>. The distance between the bobbin <NUM> and the first magnet unit <NUM> (refer to L2 in <FIG>) may be <NUM> to <NUM>.

The first lens driving device <NUM> may comprise a second mover <NUM>. The second mover <NUM> may be movably coupled to the stator <NUM> via a support member <NUM>. The second mover <NUM> can support the first mover <NUM> through the elastic member <NUM>. The second mover <NUM> can move the first mover <NUM> or can be moved with the first mover <NUM>. The second mover <NUM> can be moved through interaction with the stator <NUM>. The second mover <NUM> can be moved during OIS driving. At this time, the second mover <NUM> may be referred to as an 'OIS mover'. The second mover <NUM> can be moved integrally with the first mover <NUM> during OIS driving.

The second mover <NUM> may comprise a housing <NUM>. The housing <NUM> may be disposed outside the bobbin <NUM>. The housing <NUM> can accommodate at least a portion of the bobbin <NUM> either inside or inner side thereof. The housing <NUM> may be disposed inside (inner side) the cover <NUM>. The housing <NUM> may be disposed between the cover <NUM> and the bobbin <NUM>. The housing <NUM> may be formed of a material different from that of the cover <NUM>. The housing <NUM> may be formed of an insulating material. The housing <NUM> may be formed of an injection molded material. The outer side surface of the housing <NUM> may be spaced apart from the inner surface of the side plate <NUM> of the cover <NUM>. The housing <NUM> can be moved for OIS driving through the separating space between the housing <NUM> and the cover <NUM>. The magnet <NUM> may be disposed in the housing <NUM>. The housing <NUM> and the magnet <NUM> may be coupled together by an adhesive. The upper elastic member <NUM> may be coupled to the upper portion or upper surface of the housing <NUM>. The lower elastic member <NUM> may be coupled to the upper portion or lower surface of the housing <NUM>. The housing <NUM> may be coupled to the elastic member <NUM> by thermal welding and/or adhesive. The adhesive for coupling the housing <NUM> and the magnet <NUM>, and the housing <NUM> and the elastic member <NUM> may be an epoxy that is cured by one or more among ultraviolet (UV), heat, and laser.

The housing <NUM> may comprise four side parts and four corner portions disposed between the four side parts. The housing <NUM> may comprise a first side part disposed on the first surface side of the first lens driving device <NUM>, a second side part disposed on the opposite side of the first side part, and a third side part and a fourth side part disposed between the first side part and the second side part that are disposed at the opposite side from each other. The first side part of the housing <NUM> may be disposed on the first surface side of the first lens driving device <NUM>. The housing <NUM> may comprise four side parts, and the four side parts may optionally be referred to as a 'first side part' to a 'fourth side part' to distinguish one another. For example, the second side part may be disposed on the first surface side of the first lens driving device <NUM>, unlike the previous description.

The housing <NUM> may comprise a hole <NUM>. The hole <NUM> may be formed in the housing <NUM>. The hole <NUM> may be formed to penetrate the housing <NUM> in the optical axis direction. A bobbin <NUM> may be disposed in the hole <NUM>. The hole <NUM> may be formed in a shape corresponding to the bobbin <NUM> at least in part. The inner circumferential surface of the housing <NUM> forming the hole <NUM> may be spaced apart from the outer circumferential surface of the bobbin <NUM>. However, the housing <NUM> and the bobbin <NUM> may be overlapped with each other in the direction of the optical axis at least in part to limit the moving stroke distance of the bobbin <NUM> in the optical axis direction.

The housing <NUM> may comprise a magnet coupling portion <NUM>. A magnet <NUM> may be coupled to the magnet coupling portion <NUM>. The magnet coupling portion <NUM> may comprise an accommodating groove formed by recessing a portion of the inner circumferential surface and/or the lower surface of the housing <NUM>. The magnet coupling portion <NUM> may be formed on each of the four side parts of the housing <NUM>. As a modified embodiment, the magnet coupling portion <NUM> may be formed at each of the four corners of the housing <NUM>.

The housing <NUM> may comprise an upper plate <NUM>. The housing <NUM> may comprise an upper plate <NUM> disposed above the upper surface of the magnet <NUM>. The upper plate <NUM> can support the upper surface of the magnet <NUM>. An adhesive may be disposed between the upper plate <NUM> and the magnet <NUM>. The upper plate <NUM> may be disposed at the upper side of a portion of the upper surface of the magnet <NUM>. The stoppers <NUM> protruding toward the upper plate <NUM> of the cover <NUM> may be disposed on the upper plate <NUM>. The upper plate <NUM> may be integrally formed with the housing <NUM>. The stoppers <NUM> may be integrally formed with the upper plate <NUM>. The upper plate <NUM> may be disposed on the second side part, the third side part and the fourth side part of the housing <NUM>, respectively. That is, three upper plates <NUM> can be disposed in the housing <NUM>. The upper plate <NUM> may not be disposed on the first side part of the housing <NUM> where the dummy member <NUM> is disposed. The upper plate <NUM> of the housing <NUM> may be disposed on each of the second side part, the third side part and the fourth side part of the housing <NUM>, but not be disposed on the first side part of the housing <NUM>. That is, the upper plate <NUM> of the housing <NUM> may not be disposed on the upper portion of the dummy member <NUM> disposed on the first side part of the housing <NUM>. That is, the housing <NUM> may be asymmetric with respect to the center axis of the lens coupled to the bobbin <NUM>.

The housing <NUM> may comprise stoppers <NUM>. The stoppers <NUM> may be disposed on the upper plate <NUM>. The stoppers <NUM> may be integrally formed with the upper plate <NUM>. Two stoppers <NUM> may be provided for each upper plate <NUM>. That is, a total of six stoppers <NUM> may be disposed in the housing <NUM>. The two stoppers <NUM> may be disposed at both ends of the upper plate <NUM>, respectively. The upper surface of the stoppers <NUM> may form the upper end of the housing <NUM>. The stoppers <NUM> may be overlapped with the upper plate <NUM> of the cover <NUM> in the optical axis direction. That is, when the housing <NUM> continues to move upward, the upper surface of the stoppers <NUM> comes into contact with the upper plate <NUM> of the cover <NUM>. Therefore, the stoppers <NUM> can limit the upward moving distance of the housing <NUM>.

The second mover <NUM> may comprise a magnet <NUM>. The magnet <NUM> may be disposed in the housing <NUM>. The magnet <NUM> may be fixed to the housing <NUM> by an adhesive. The magnet <NUM> may be disposed between the bobbin <NUM> and the housing <NUM>. The magnet <NUM> may face the first coil <NUM>. The magnet <NUM> may be electromagnetically interacted with the first coil <NUM>. The magnet <NUM> may face the second coil <NUM>. The magnet <NUM> may be electromagnetically interacted with the second coil <NUM>. The magnet <NUM> can be commonly used for AF driving and OIS driving. The magnet <NUM> may be disposed on the side part of the housing <NUM>. At this time, the magnet <NUM> may be a flat plate magnet having a flat plate shape. As a modified embodiment, the magnet <NUM> may be disposed at corner portions of the housing <NUM>. At this time, the magnet <NUM> may be a corner magnet having an inner side surface of a hexahedron shape wider than the outer side surface.

In this embodiment, the upper surface of the magnet <NUM> comprises a first portion being overlapped with the upper elastic member <NUM> in the optical axis direction. The first portion of the upper surface of the magnet <NUM> is not overlapped with the housing <NUM> in the direction of the optical axis. The first portion of the upper surface of the magnet <NUM> may be exposed from the housing <NUM> so as to face the upper elastic member <NUM>. The first portion of the upper surface of the magnet <NUM> may be in contact with the upper elastic member <NUM>. The upper surface of the magnet <NUM> comprises a second portion that is overlapped with the housing <NUM> in the optical axis direction. The upper plate <NUM> of the housing <NUM> may be disposed above the second portion of the upper surface of the magnet <NUM>. The second portion of the upper surface of the magnet <NUM> may be coupled with the upper plate <NUM> of the housing <NUM>. The second portion of the upper surface of the magnet <NUM> may not be overlapped with the upper elastic member <NUM> in the direction of the optical axis. The upper surface of the magnet <NUM> may further comprise a third portion not being overlapped with the housing <NUM> and the upper elastic member <NUM> in the direction of the optical axis. That is, the upper surface of the magnet <NUM> may comprise a first portion being overlapped with the upper elastic member <NUM> in the direction of the optical axis, a second portion being overlapped with the upper plate <NUM> of the housing <NUM>, and a third portion not being overlapped with all of the upper elastic member <NUM> and the upper plate <NUM> of the housing <NUM>. However, the third portion may not exist.

In this embodiment, the upper surface of the magnet <NUM> may be disposed on the same plane as the upper surface of the housing <NUM> to which the upper elastic member <NUM> is coupled. For this structure, a part of the housing <NUM> may be omitted in this embodiment. That is, the structure can be described as a part of the housing <NUM> is omitted and the upper elastic member <NUM> is disposed at the corresponding part. A portion of the upper surface of the magnet <NUM> may be in contact with the upper elastic member <NUM>. Further, another portion of the upper surface of the magnet <NUM> may be in contact with the upper plate <NUM> of the housing <NUM>.

The magnets <NUM> may comprise a plurality of magnets that are spaced apart from each other. The magnets <NUM> may comprise three magnets that are spaced apart from each other. The magnet <NUM> may comprise first to third magnet units <NUM>, <NUM>, and <NUM>. The magnet <NUM> comprises a first magnet unit <NUM> disposed on the second side part of the housing <NUM>, a second magnet unit <NUM> disposed on the third side part of the housing <NUM>, and a third magnet unit <NUM> disposed on the fourth side part. The first magnet unit <NUM> may face a first coil unit 1422a of the second coil <NUM>. The second magnet unit <NUM> may face the first coil unit <NUM> of the first coil <NUM> and may face a second coil unit 1422b of the second coil <NUM>. The third magnet unit <NUM> may face the second coil unit <NUM> of the first coil <NUM> and may face the third coil unit 1422c of the second coil <NUM>. The second magnet unit <NUM> and the third magnet unit <NUM> can move the bobbin <NUM> in the optical axis direction. The first magnet unit <NUM>, the second magnet unit <NUM>, and the third magnet unit <NUM> can move the housing <NUM> in a direction perpendicular to the optical axis direction.

The first magnet unit <NUM> may be a <NUM>-pole magnet. In this embodiment, the second magnet unit <NUM> and the third magnet unit <NUM> may be <NUM>-pole magnets. The <NUM>-pole magnet may be a <NUM>-pole magnetized magnet, and the <NUM>-pole magnet may be a <NUM>-pole magnetized magnet. Due to this, in the present embodiment, the magnetic interference between the magnets <NUM> of the first lens driving device <NUM> and the magnets <NUM> of the second lens driving device <NUM> can be reduced. In the comparative example, the second magnet unit <NUM> and the third magnet unit <NUM> are provided as <NUM>-pole magnets. <FIG> is a view illustrating the magnetic field distribution of the comparative example. <FIG> is a view illustrating the magnetic field distribution of the present embodiment. Comparing <FIG> with <FIG>, it can be seen that the magnetic interference between the magnet <NUM> of the first lens driving device <NUM> and the magnet <NUM> of the second lens driving device <NUM> is reduced or eliminated.

Each of the second magnet unit <NUM> and the third magnet unit <NUM> may comprise a first surface facing the first coil <NUM>. The first surface may comprise a neutral portion <NUM> that is disposed horizontally in the center portion. The neutral portion <NUM> may be a neutral region and may not comprise polarity. The first surface may have a polarity different from that of the upper portion and the lower portion with respect to the neutral portion <NUM>. That is, the upper side of the neutral portion <NUM> may have an S pole, and the lower side of the neutral portion <NUM> may have an N pole. As a modified embodiment, the upper side of the neutral portion <NUM> may have an N pole, and the lower side of the neutral portion <NUM> may have an S pole. The vertical length (refer to L in <FIG>) of the neutral portion <NUM> may be <NUM> to <NUM>.

Each of the first to third magnet units <NUM>, <NUM>, and <NUM> may comprise a second surface facing the second coil <NUM> and a third surface disposed at the opposite side of the second surface. The second surface may be the inner side which is the center side of the first lens driving device <NUM>, and the third surface may be the outer side which is the opposite side of the inner side. The second and third surfaces of each of the first to third magnet units <NUM>, <NUM>, and <NUM> may have different polarities. That is, the second surface may have an N pole and the third surface may have an S pole. As a modified embodiment, the second surface may have an S pole and the third surface may have an N pole.

The second mover <NUM> may comprise a dummy member <NUM>. The dummy member <NUM> may be disposed on the first side part of the housing <NUM>. The dummy member <NUM> may comprise a nonmagnetic material. The dummy member <NUM> may have a mass corresponding to the first magnet unit <NUM>. The dummy member <NUM> may be disposed at a position corresponding to the first magnet unit <NUM> for weight balance. Or, the intensity of the magnetism of the dummy member <NUM> may be weaker than the intensity of the magnetism of the first magnet unit <NUM>. The dummy member <NUM> may be disposed on the opposite side of the first magnet unit <NUM> in order to center the weight. The dummy member <NUM> may be non-magnetic material. The dummy member <NUM> may be made of <NUM>% or more of tungsten. That is, the dummy member <NUM> may be a tungsten alloy. For example, the specific gravity of the dummy member <NUM> may be <NUM>,<NUM> or more. The entire upper surface of the dummy member <NUM> may be exposed from the housing <NUM><NUM>. That is, the upper surface of the dummy member <NUM> may not be overlapped with or supported by the housing <NUM> in the direction of the optical axis. The upper plate <NUM> of the housing <NUM> may not be disposed above the dummy member <NUM>. The second coil <NUM> may not be disposed between the dummy member <NUM> and the substrate <NUM>.

The dummy member <NUM> may include a shape suitable for assembling to the housing <NUM>. The dummy member <NUM> may comprise protrusions being protruded toward the both side directions. The dummy member <NUM> may comprise a shape for avoiding interference with adjacent operating components. The dummy member <NUM> may comprise a groove formed at a portion where the upper surface and the inner surface meet. The length of the outer surface of the dummy member <NUM> in the horizontal direction may be shorter than the length in the corresponding direction of the first magnet unit <NUM>. The thickness of the dummy member <NUM> may be corresponding to the thickness of the first magnet unit <NUM>. Alternatively, the thickness of the dummy member <NUM> may be larger or smaller than the thickness of the first magnet unit <NUM>. The shape of the dummy member <NUM> may be different from the shape of the first magnet unit <NUM>. Alternatively, the shape of the dummy member <NUM> may be corresponding to the shape of the first magnet unit <NUM>. The dummy member <NUM> may be disposed at the same height as the first magnet unit <NUM>. Alternatively, the dummy member <NUM> may be disposed higher or lower than the first magnet unit <NUM>. The upper end of the dummy member <NUM> may be disposed at the same height as the upper end of the first magnet unit <NUM>. Alternatively, the upper end of the dummy member <NUM> may be disposed higher or lower than the upper end of the first magnet unit <NUM>. The lower end of the dummy member <NUM> may be disposed at a height corresponding to the lower end of the first magnet unit <NUM>. Alternatively, the lower end of the dummy member <NUM> may be disposed higher or lower than the lower end of the first magnet unit <NUM>. As illustrated in <FIG>, the dummy member <NUM> may be disposed between the magnet <NUM> of the first lens driving device <NUM> and the magnet <NUM> of the second lens driving device <NUM>. The horizontal length of the dummy member <NUM> may be the same as the horizontal length of the first magnet unit <NUM>, or may be shorter or longer. The vertical length of the dummy member <NUM> may be same as the horizontal length of the first magnet unit <NUM>, or may be shorter or longer.

The first lens driving device <NUM> may comprise a stator <NUM>. The stator <NUM> may be disposed below the first and second movers <NUM> and <NUM>. The stator <NUM> can movably support the second movers <NUM>. The stator <NUM> can move the second mover <NUM>. At this time, the first mover <NUM> can be moved together with the second mover <NUM>.

The stator <NUM> may comprise a substrate <NUM>. The substrate <NUM> may comprise a second coil <NUM> facing the magnet <NUM>. Or, the substrate <NUM> may comprise a circuit member <NUM> that comprises a second coil <NUM> facing the magnet <NUM>. The substrate <NUM> may be disposed on a base <NUM>. The substrate <NUM> may be disposed between the housing <NUM> and the base <NUM>. The support member <NUM> may be coupled to the substrate <NUM>. The substrate <NUM> can supply power to the second coil <NUM>. The substrate <NUM> may be coupled to the circuit member <NUM>. The substrate <NUM> may be coupled to the second coil <NUM>. The substrate <NUM> may be coupled to the printed circuit board <NUM> disposed below the base <NUM>. The substrate <NUM> may comprise a flexible printed circuit board (FPCB). The substrate <NUM> may be bent at a certain portion.

The substrate <NUM> may comprise a body portion <NUM>. The substrate <NUM> may comprise a hole 1411a formed in the body portion <NUM>. The substrate <NUM> may comprise a hole 1411a corresponding to a lens coupled to the bobbin <NUM>. The hole 1411a may be eccentrically disposed toward the first surface of the first lens driving device <NUM>. In this embodiment, through such an eccentric arrangement structure of the hole 1411a, one or more spaces can be secured among the base <NUM>, the substrate <NUM>, and the circuit member <NUM> for increasing the number of turns of the first coil unit 1422a. The hole 1411a of the substrate <NUM> is formed closer to one side surface of the substrate <NUM>. At this time, the one side surface of the substrate <NUM> may be adjacent to the dummy member <NUM>. The shortest distance from the other side surface located at the opposite side of the one side surface of the substrate <NUM> to the hole 1411a may be larger than the shortest distance from the one side surface to the hole 1411a.

The substrate <NUM> may comprise a hole 1411a, an inner circumferential surface formed by the hole 1411a, a first side surface disposed on the first side part of the housing <NUM>, and a second side surface disposed on the second side part of the housing <NUM>. The distance between the inner circumferential surface of the substrate <NUM> and the second side surface of the substrate <NUM> (refer to W4 in <FIG>) may be larger than the distance between the inner circumferential surface of the substrate <NUM> and the first side surface of the substrate <NUM> (refer to W3 in <FIG>). A first coil unit 1422a may be disposed between the inner circumferential surface of the substrate <NUM> and the second side surface of the substrate <NUM>. The second coil <NUM> may not be disposed between the inner circumferential surface of the substrate <NUM> and the first side surface of the substrate <NUM>.

The substrate <NUM> may comprise a first side surface disposed on the first surface side of the first lens driving device <NUM>, a second side surface disposed on the opposite side of the first side surface, and a third side surface and a fourth side surface disposed between the first side surface and the second side surface and disposed on the opposite side from each other. At this time, the distance between the third side surface and the fourth side surface (refer to W1 in <FIG>) may be longer than the distance between the first side surface and the second side surface (refer to W2 in <FIG>). Through the above-mentioned structure of the present embodiment, a space can be secured so that the length L1 of the first coil unit 1422a in the lengthwise direction can be formed to be longer than the length L2 of each of the second and third coil units 1422b and 1422c in the lengthwise direction.

The substrate <NUM> may comprise a terminal portion <NUM>. The terminal portion <NUM> may extend from the body portion <NUM> of the substrate <NUM>. The terminal portion <NUM> may be formed by bending a part of the substrate <NUM> downward. At least a part of the terminal portion <NUM> may be exposed to the outside. The terminal portion <NUM> may be coupled to the printed circuit board <NUM> disposed below the base <NUM> by soldering. The terminal portion <NUM> may be disposed in a terminal accommodating portion <NUM> of the base <NUM>.

The substrate <NUM> may comprise a circuit member <NUM>. The stator <NUM> may comprise a circuit member <NUM>. The circuit member <NUM> may be disposed on the base <NUM>. The circuit member <NUM> may be disposed on the substrate <NUM>. The circuit member <NUM> may be disposed between the magnet <NUM> and the base <NUM>. Here, although the circuit member <NUM> is described as a separate component from the substrate <NUM>, the circuit member <NUM> can be understood as a component included in the substrate <NUM>.

The circuit member <NUM> may comprise a substrate portion <NUM>. The substrate portion <NUM> may be a circuit board. The substrate portion <NUM> may be an FPCB. The second coil <NUM> may be integrally formed with a fine pattern coil (FP coil) on the substrate portion <NUM>. A hole through which the support member <NUM> passes may be formed in the substrate portion <NUM>. A hole 1421a may be formed in the substrate portion <NUM>. The hole 1421a of the substrate portion <NUM> may be formed corresponding to the hole 1411a of the substrate <NUM>.

The circuit member <NUM> may comprise a second coil <NUM>. The second coil <NUM> may face the magnet <NUM>. The second coil <NUM> can be electromagnetically interacted with the magnet <NUM>. In this case, when an electric current is supplied to the second coil <NUM> and an electromagnetic field is formed around the second coil <NUM>, electromagnetic coupling between the second coil <NUM> and the magnet <NUM> causes the second coil <NUM> to move with respect to the magnet <NUM>. The second coil <NUM> can move the housing <NUM> and the bobbin <NUM> in a direction perpendicular to the optical axis with respect to the base <NUM> through an electromagnetic interaction with the magnet <NUM>. The second coil <NUM> may be a fine pattern coil (FP coil) formed integrally with the base plate <NUM>.

The second coil <NUM> may comprise a first coil unit 1422a facing the first magnet unit <NUM>, a second coil unit 1422b facing the second magnet unit <NUM>, and a third coil unit 1422c facing the third magnet unit <NUM>. The number of turns of the coil wound in the first coil unit 1422a may be greater than the number of turns of the coil wound in the second coil unit 1422b. The number of turns of the coil wound in the third coil unit 1422c may be corresponding to the number of turns of the coil wound in the second coil unit 1422b. In the present embodiment, movement in the X-axis direction during the OIS driving can be performed through the first coil unit 1422a, and movement in the Y-axis direction can be performed through the second coil unit 1422b and the third coil unit 1422c. Therefore, in this embodiment, the number of turns of the first coil unit 1422a is made higher than the number of turns of the second coil unit 1422b and the third coil unit 1422c in order to supplement the insufficient driving force in the X-axis direction. For example, the ratio of the number of turns of the first coil unit 1422a to the number of turns of the second coil unit 1422b (or the third coil unit 1422c) may be <NUM>:<NUM> to <NUM>:<NUM>. This is to compensate for the fact that the second coil <NUM> is not disposed at a position facing the first coil unit 1422a. That is, the ratio of the number of turns of the first coil unit 1422a to the number of turns of the second coil unit 1422b (or the third coil unit 1422c) can be arranged to <NUM>:<NUM> due to spatial limitation. The length in the lengthwise direction of the first coil unit 1422a (refer to L1 in <FIG>) is longer than the length in the lengthwise direction of the second coil unit 1422b and the third coil unit 1422c (refer to L2 in <FIG>). The length in the widthwise direction of the first coil unit 1422a (refer to L3 in <FIG>) is longer than the widthwise direction (refer to L4 in <FIG>) of each of the second coil unit 1422b and the third coil unit 1422c.

In the present embodiment, the center axis (refer to C1 in <FIG>) of the lens coupled to the bobbin <NUM> may be eccentrically disposed toward the direction of the dummy member <NUM> from the center axis of the first lens driving device <NUM>. The center axis C1 of the bobbin <NUM> may be disposed eccentrically toward the direction of the dummy member <NUM> from the center axis C2 of the housing <NUM>. At this time, the center axis C1 of the lens can coincide with the center axis C1 of the bobbin <NUM> or the center axis of the hole <NUM> of the housing <NUM>. The center axis C2 of the first lens driving device <NUM> and the center axis C2 of the housing <NUM> may coincide with each other. At this time, the center axis C2 of the housing <NUM> may be a center axis viewed with reference to the outer periphery of the housing <NUM>, not the center axis of the hole <NUM> of the housing <NUM>. Further, the hole 1411a may be disposed eccentrically to the first surface side of the first lens driving device <NUM>. Through the above-mentioned structure of the present embodiment, a space can be secured so that the length L1 of the first coil unit 1422a in the lengthwise direction can be formed to be longer than the length L2 of each of the second and third coil units 1422b and 1422c in the lengthwise direction.

The stator <NUM> may comprise a base <NUM>. The base <NUM> may be disposed at the lower side of the housing <NUM>. The base <NUM> may be disposed on the lower side of the substrate <NUM>. The substrate <NUM> may be disposed on the upper surface of the base <NUM>. The base <NUM> can be coupled to the cover <NUM>. The base <NUM> may be disposed on the upper side of the printed circuit board <NUM>.

The base <NUM> may comprise a hole <NUM>. The hole <NUM> may be formed in the base <NUM>. The hole <NUM> may be formed to penetrate the base <NUM> in the optical axis direction. Light passing through the lens module through the hole <NUM> can be incident on the image sensor. That is, light passing through the lens module can be incident on the image sensor through the hole 1421a of the circuit member <NUM>, the hole 1411a of the substrate <NUM>, and the hole <NUM> of the base <NUM>.

The base <NUM> may comprise a sensor coupling portion <NUM>. A second sensor (not shown) may be disposed in the sensor coupling portion <NUM>. The sensor coupling portion <NUM> can accommodate at least a part of the second sensor. The sensor coupling portion <NUM> may comprise a groove formed by recessing the upper surface of the base <NUM>. The sensor coupling portion <NUM> may comprise two grooves. At this time, a second sensor is disposed in each of the two grooves so that the movement of the magnet <NUM> in the X-axis direction and in the Y-axis direction can be sensed.

The base <NUM> may comprise a terminal accommodating portion <NUM>. A terminal portion <NUM> of the substrate <NUM> may be disposed in the terminal accommodating portion <NUM>. The terminal accommodating portion <NUM> may comprise a groove formed by inwardly recessing a part of the side surface of the base <NUM>. The width of the terminal accommodating portion <NUM> may be formed to correspond to the width of the terminal portion <NUM> of the substrate <NUM>. The length of the terminal accommodating portion <NUM> may be formed corresponding to the length of the terminal portion <NUM> of the substrate <NUM>.

The base <NUM> may comprise a stepped portion <NUM>. The stepped portion <NUM> may be formed on the side surface of the base <NUM>. The stepped portion <NUM> can be formed around the outer circumferential surface of the base <NUM>. The stepped portion <NUM> may be formed by recessing the upper portion of the side surface of the base <NUM>. Alternatively, the stepped portion <NUM> may be formed by protruding a lower portion of the side surface of the base <NUM>. The lower end of the side plate <NUM> of the cover <NUM> may be disposed on the stepped portion <NUM>.

The first lens driving device <NUM> may comprise an elastic member <NUM>. The elastic member <NUM> can be coupled to the bobbin <NUM> and the housing <NUM>. The elastic member <NUM> can elastically support the bobbin <NUM>. The elastic member <NUM> may have elasticity at least in part. The elastic member <NUM> can movably support the bobbin <NUM>. The elastic member <NUM> can support the movement of the bobbin <NUM> during AF driving. At this time, the elastic member <NUM> may be referred to as an 'AF supporting member'.

The elastic member <NUM> may comprise an upper elastic member <NUM>. The upper elastic member <NUM> may be disposed on the upper side of the bobbin <NUM>. The upper elastic member <NUM> may be coupled to the bobbin <NUM> and the housing <NUM>. The upper elastic member <NUM> may be coupled to the upper surface of the bobbin <NUM>. The upper elastic member <NUM> may be coupled to the upper surface of the housing <NUM>. The upper elastic member <NUM> may be coupled with the support member <NUM>. The upper elastic member <NUM> may be formed of a plate spring.

The upper elastic member <NUM> may be used as a conductive line for supplying electricity to the first coil <NUM>. The upper elastic member <NUM> may comprise a first upper elastic unit 1510a and a second upper elastic unit 1510b that are spaced apart from each other. The first upper elastic unit 1510a may be coupled to one end of the first coil <NUM> and the second upper elastic unit 1510b may be coupled to the other end of the first coil <NUM>. The upper elastic member <NUM> and the first coil <NUM> may be coupled by soldering.

The upper elastic member <NUM> may comprise an outer side portion <NUM>. The outer side portion <NUM> may be coupled to the housing <NUM>. The outer side portion <NUM> may be coupled to the upper surface of the housing <NUM>. The outer side portion <NUM> may comprise a hole or groove coupled to the protrusion of the housing <NUM>. The outer side portion <NUM> may be fixed to the housing <NUM> by an adhesive.

The upper elastic member <NUM> may comprise an inner side portion <NUM>. The inner side portion <NUM> can be coupled to the bobbin <NUM>. The inner side portion <NUM> can be coupled to the upper surface of the bobbin <NUM>. The inner side portion <NUM> may comprise a hole or groove coupled to a protrusion of the bobbin <NUM>. The inner side portion <NUM> can be fixed to the bobbin <NUM> by an adhesive.

The upper elastic member <NUM> may comprise a connecting portion <NUM>. The connecting portion <NUM> can connect the outer side portion <NUM> and the inner side portion <NUM>. The connecting portion <NUM> can elastically connect the outer side portion <NUM> and the inner side portion <NUM>. The connecting portion <NUM> may have elasticity. At this time, the connecting portion <NUM> may be referred to as an 'elastic portion'. The connecting portion <NUM> may be formed by bending two or more times.

The upper elastic member <NUM> may comprise a coupling portion <NUM>. The coupling portion <NUM> can be coupled with the support member <NUM>. The coupling portion <NUM> may be coupled to the support member <NUM> by soldering. The coupling portion <NUM> may comprise a hole or groove coupled with the support member <NUM>. The coupling portion <NUM> may extend from the outer side portion <NUM>. The coupling portion <NUM> may comprise a bent portion formed by being bent.

The elastic member <NUM> may comprise a lower elastic member <NUM>. The lower elastic member <NUM> may be disposed on the lower side of the bobbin <NUM>. The lower elastic member <NUM> may be coupled to the bobbin <NUM> and the housing <NUM>. The lower elastic member <NUM> can be coupled to the lower surface of the bobbin <NUM>. The lower elastic member <NUM> can be coupled to the lower surface of the housing <NUM>. The lower elastic member <NUM> may be formed of a plate spring. The lower elastic member <NUM> may be integrally formed.

The lower elastic member <NUM> may comprise an outer side portion <NUM>. The outer side portion <NUM> can be coupled to the housing <NUM>. The outer side portion <NUM> may be coupled to the lower surface of the housing <NUM>. The outer side portion <NUM> may comprise a hole or groove coupled to the protrusion of the housing <NUM>. The outer side portion <NUM> can be fixed to the housing <NUM> by an adhesive.

The lower elastic member <NUM> may comprise an inner side portion <NUM>. The inner side portion <NUM> can be coupled to the bobbin <NUM>. The inner side portion <NUM> can be coupled to the lower surface of the bobbin <NUM>. The inner side portion <NUM> may comprise a hole or groove coupled to the protrusion of the bobbin <NUM>. The inner side portion <NUM> can be fixed to the bobbin <NUM> by an adhesive.

The lower elastic member <NUM> may comprise a connecting portion <NUM>. The connecting portion <NUM> can connect the outer side portion <NUM> and the inner side portion <NUM>. The connecting portion <NUM> can elastically connect the outer side portion <NUM> and the inner side portion <NUM>. The connecting portion <NUM> may have elasticity. At this time, the connecting portion <NUM> may be referred to as an 'elastic portion'. The connecting portion <NUM> may be formed by bending two or more times.

The first lens driving device <NUM> may comprise a support member <NUM>. The support member <NUM> may be a suspension wire. The support member <NUM> can movably support the housing <NUM>. The support member <NUM> can elastically support the housing <NUM>. The support member <NUM> may have elasticity at least in part. The support member <NUM> can support the movement of the housing <NUM> and the bobbin <NUM> during OIS driving. At this time, the support member <NUM> may be referred to as an 'OIS support member'. The support member <NUM> may comprise a plurality of wires. The support member <NUM> may comprise four wires that are spaced apart from each other. As a modified embodiment, the support member <NUM> may be formed of a plate spring. The support member <NUM> may be coupled to the upper elastic member <NUM> and the substrate <NUM>. The support member <NUM> may be coupled to the upper elastic member <NUM> and the circuit member <NUM> of the substrate <NUM>. The support member <NUM> may be soldered to the lower surface of the substrate <NUM> penetrating through the hole of the substrate <NUM>. Alternatively, the support member <NUM> may be soldered to the lower surface of the circuit member <NUM> penetrating through the hole of the circuit member <NUM>.

The damper (not shown) of the first lens driving device <NUM> may be disposed on the support member <NUM>. The damper may be disposed on the support member <NUM> and in the housing <NUM>. The damper may be disposed on the elastic member <NUM>. The damper may be disposed on the elastic member <NUM> and/or the support member <NUM> to prevent the resonance phenomenon occurring in the elastic member <NUM> and/or the support member <NUM>.

The first lens driving device <NUM> may comprise a first sensor (not shown). The first sensor may be a sensor for AF feedback. The first sensor may be disposed on the bobbin <NUM>. Alternatively, the first sensor may be disposed in the housing <NUM>. The first sensor may sense movement of the first mover <NUM>. The first sensor may comprise a Hall sensor. At this time, the Hall sensor can sense the movement of the bobbin <NUM> and the lens by sensing the magnetic force of the magnet <NUM> or the magnet provided separately. The sensed value sensed by the first sensor may be used for AF feedback control.

The first lens driving device <NUM> may comprise a second sensor. The second sensor may be a sensor for OIS feedback. The second sensor may be disposed between the base <NUM> and the substrate <NUM>. The second sensor can sense the movement of the second mover <NUM>. The second sensor may comprise a Hall sensor. At this time, the hall sensor senses the magnetic force of the magnet <NUM> and can detect the movement of the housing <NUM> and the magnet <NUM>. The sensed value sensed by the second sensor can be used for OIS feedback control.

Hereinafter, the configuration of the second lens driving device will be described with reference to the drawings.

<FIG> is an exploded perspective view of the second lens driving device according to the present embodiment.

The second lens driving device <NUM> may be a voice coil motor (VCM).

The second lens driving device <NUM> may comprise a cover <NUM>. The cover <NUM> can accommodate the housing <NUM> inside. The cover <NUM> may be coupled to the base <NUM>.

The second lens driving device <NUM> may comprise a first mover <NUM>. The first mover <NUM> can be moved during AF driving.

The first mover <NUM> may comprise a bobbin <NUM>. The bobbin <NUM> may be disposed on the inner side of the housing <NUM>. The bobbin <NUM> may be movably coupled to the housing <NUM> by an elastic member <NUM>.

The first mover <NUM> may comprise a first coil <NUM>. The first coil <NUM> may be disposed on the bobbin <NUM>. The first coil <NUM> may face the magnet <NUM>. The first mover <NUM> can perform AF driving through the electromagnetic interaction between the first coil <NUM> and the magnet <NUM>.

The second lens driving device <NUM> may comprise a second mover <NUM>. The second mover <NUM> can be moved during OIS driving. The first mover <NUM> can be moved with the second mover <NUM> during OIS driving.

The second mover <NUM> may comprise a housing <NUM>. The housing <NUM> may be disposed outside the bobbin <NUM>. The housing <NUM> can accommodate the bobbin <NUM> inside. The housing <NUM> may be disposed between the bobbin <NUM> and the cover <NUM>.

The second mover <NUM> may comprise a magnet <NUM>. The magnet <NUM> may be disposed in the housing <NUM>. The magnet <NUM> may face the first coil <NUM>. The magnet <NUM> may face the second coil <NUM>. The magnet <NUM> may be disposed at four corners disposed between the four side parts of the housing <NUM>. The magnet <NUM> may comprise four corner magnets disposed in each of the four corner portions.

The second lens driving device <NUM> may comprise a stator <NUM>. The stator <NUM> can movably support the second mover <NUM>.

The stator <NUM> may comprise a substrate <NUM>. The substrate <NUM> may be disposed on the base <NUM>. The substrate <NUM> may be disposed between the housing <NUM> and the base <NUM>. The substrate <NUM> may comprise a circuit member <NUM> that comprises a second coil <NUM> facing the magnet <NUM>. The substrate <NUM> may be disposed on the base <NUM>.

The substrate <NUM> may comprise a terminal portion <NUM>. The substrate <NUM> may comprise a terminal portion <NUM> formed by being bent partially. The terminal portion <NUM> can be coupled to the printed circuit board <NUM> by soldering.

The substrate <NUM> may comprise a circuit member <NUM>. The circuit member <NUM> may comprise a substrate portion and a second coil <NUM> formed of a fine pattern coil (FP coil) on the substrate portion. The circuit member <NUM> may comprise a second coil <NUM>. The second coil <NUM> may face the magnet <NUM>. The OIS driving can be performed by the electromagnetic interaction between the second coil <NUM> and the magnet <NUM>.

The stator <NUM> may comprise a base <NUM>. The base <NUM> may be disposed on the lower side of the housing <NUM>. The base <NUM> can support the substrate <NUM>.

The second lens driving device <NUM> may comprise an elastic member <NUM>. The elastic member <NUM> may be coupled to the bobbin <NUM> and the housing <NUM>. The elastic member <NUM> can support the movement of the bobbin <NUM> during AF driving. The elastic member <NUM> may comprise an upper elastic member <NUM>. The upper elastic member <NUM> may be disposed on the upper side of the bobbin <NUM> and may be coupled to the bobbin <NUM> and the housing <NUM>. The elastic member <NUM> may comprise a lower elastic member <NUM>. The lower elastic member <NUM> may be disposed at the lower side of the bobbin <NUM> and may be coupled to the bobbin <NUM> and the housing <NUM>.

The second lens driving device <NUM> may comprise a support member <NUM>. The support member <NUM> can movably support the second mover <NUM>. The support member <NUM> may be coupled to the upper elastic member <NUM> and the substrate <NUM>.

The present embodiment proposes a structure capable of eliminating mutual interference between the magnets in a voice coil motor (VCM) structure.

In this embodiment, the magnet <NUM> of the first lens driving device <NUM> is composed of three magnets, the two magnets may be <NUM>-pole magnets, and the remaining one magnet may be a <NUM>-pole magnet. Two first coils <NUM> are connected in series facing the <NUM>-pole magnets to provide a driving force required for the AF operation, and a second coil <NUM> is disposed at the lower end of each magnet so that OIS driving force in X-axis and Y-axis direction can be provided. In order to center the weight, a dummy mass is disposed on the opposite side of the magnetized <NUM>-pole magnet, thereby preventing the oscillation due to weight eccentricity during OIS operation.

According to the mechanical configuration of the present embodiment, the first coil <NUM> is directly wound on the two facing side surfaces among the four side surfaces of the bobbin <NUM>, and three magnets and a dummy member can be assembled into the housing instead of the four magnets. In the Y-direction, driving force is generated in the categorized components of the two magnetized <NUM>-pole magnets and a pair of second coils <NUM>, but in the X-direction, driving force is generated in the categorized components of only one magnetized <NUM>-pole magnet and one second coil <NUM>, therefore the driving force in the X-direction is inevitably small. In order to solve this problem, in the present embodiment, the center axis C1 of the lens is off-centered from the center axis C2 of the product in the direction of the dummy member <NUM>, and the number of turns of the coil <NUM> is increased by utilizing a spare space in the base <NUM> side, thereby increasing the driving force in the X-direction.

As in the comparative example, when the <NUM>-pole magnet is used alone, the density of the magnetic field distribution with the adjacent magnets increases, so that attractive force or repulsive force between the adjacent VCMs may occur, which may cause difficulty in controlling of the OIS. The magnetic field distribution according to the comparative example is illustrated in <FIG>.

In this embodiment, by applying the magnetized <NUM>-pole magnet, the magnetic field interference between the magnets of the two lens driving devices can be reduced. This is illustrated in <FIG>. Meanwhile, according to the present embodiment, when the attractive force or repulsive force between the adjacent VCMs due to magnetic field interference is designed to be a negligible level, OIS control becomes possible as the influence of magnetic field interference can be ignored.

In this embodiment, the portion of the housing <NUM>, which has been in contact with the top surface of the magnet <NUM> and has a minimum injection thickness, is removed so that the assembly surface of the upper elastic member <NUM> and the upper surface of the magnet <NUM> can be configured to coincide with each other. In this embodiment, the space that is flush with the assembling surface of the upper elastic member <NUM> but not being crossed by the upper elastic member <NUM> is filled with the injection material so that the upper plate <NUM> of the housing <NUM> can be configured with the outer peripheral portion where the stoppers <NUM> are located. When viewed from above (as seen in top view), as illustrated in <FIG> of the present embodiment, the magnet <NUM> can be mechanically restrained by the upper plate <NUM> of the housing <NUM> connected to the stoppers <NUM> of the housing <NUM> that exposes a part of the upper surface of the magnet <NUM> while maintaining a gap with respect to the cover <NUM>. That is, the mechanical restraining effect of the magnet <NUM> and the effect of assembling the upper surface of the magnet <NUM> upwardly can be simultaneously ensured through the present embodiment.

Claim 1:
A lens driving device, characterized by:
a base (<NUM>);
a housing (<NUM>) disposed on the base (<NUM>);
a bobbin (<NUM>) disposed in the housing (<NUM>);
a first coil (<NUM>) disposed on the bobbin (<NUM>);
a second coil (<NUM>) disposed on the base (<NUM>);
a magnet (<NUM>) disposed on the housing (<NUM>); and
an upper elastic member (<NUM>) coupled with the housing (<NUM>) and the bobbin (<NUM>),
wherein the magnet (<NUM>) comprises an upper surface facing the upper elastic member (<NUM>),
wherein the upper surface of the magnet (<NUM>) comprises a first portion overlapped with the upper elastic member (<NUM>) and not overlapped with the housing (<NUM>) in an optical axis direction, and a second portion overlapped with the housing (<NUM>) and not overlapped with the upper elastic member (<NUM>) in the optical axis direction.