KR20170002804A - Lens driving unit, camera module and optical apparatus - Google Patents

Abstract

According to the present invention, a lens driving unit comprises: a first rotor including a first driving unit, and a bobbin where the first driving unit is placed; a second rotor including a second driving unit to move the first driving unit through an electromagnetic interaction with the first driving unit, and a housing where the second driving unit is placed; and a stator including a third driving unit to move the second driving unit through the electromagnetic interaction with the second driving unit. The second driving unit comprises: a first driving magnet, a second driving magnet neighboring to the first driving unit, and a third magnet neighboring to the second driving unit. A first separation distance between the first and the second driving magnet is different from a second separation distance between the second and the third driving magnet. As such, a precise auto-focus function and a precise auto-focus feedback function is able to be provided.

Description

[0001] The present invention relates to a lens driving unit, a camera module,

The present embodiment relates to a lens driving unit, a camera module, and an optical apparatus.

As the spread of various portable terminals is widely popularized and the wireless Internet service is commercialized, the demands of consumers related to portable terminals are diversified, and various kinds of additional devices are installed in portable terminals.

Among them, there is a camera module which photographs a subject as a photograph or a moving picture.

Meanwhile, in recent years, a camera module having an auto focus function has been used, and it is necessary to use an autofocus feedback for more precise autofocus control.

However, when the autofocus feedback is applied to a conventional camera module, the sensing structure for sensing the position of the bobbin affects the posture of the bobbin, so that static tilt and dynamic tilt are generated There is a problem.

In order to solve the above-described problem, it is desirable to provide a lens driving unit having a first magnet for sensing a position of a bobbin and a second magnet for magnetic force balance.

It is also intended to provide a camera module and an optical apparatus having a precise autofocus function, an image stabilization function, an autofocus feedback function, and / or an image stabilization feedback function using the lens driving unit.

In order to solve the above-described problems, the lens driving unit according to the present embodiment includes: a first mover including a first driving unit and a bobbin in which the first driving unit is located; A second driving unit for moving the first driving unit through an electromagnetic interaction with the first driving unit, and a second mover including a housing in which the second driving unit is located; And a third driving unit for moving the second driving unit through an electromagnetic interaction with the second driving unit, wherein the second driving unit includes a first driving magnet and a second driving unit that is located adjacent to the first driving magnet A third drive magnet disposed adjacent to the second drive magnet, and a fourth drive magnet disposed adjacent to the third drive magnet, wherein a size of the first drive magnet is different from a size of the second drive magnet, The size of the magnet can be different.

An imaginary line connecting the center of the first driving magnet and the center of the housing and an imaginary line connecting the center of the second driving magnet and the center of the housing may form an acute angle or an obtuse angle.

The first distance between the first drive magnet and the second drive magnet may be different from the second distance between the second drive magnet and the third drive magnet.

Wherein the fourth drive magnet is disposed below the first drive magnet and the third drive magnet and the separation distance between the third drive magnet and the fourth drive magnet corresponds to the first separation space, The distance between the driving magnet and the first driving magnet may correspond to the second distance.

The first drive magnet may have the same thickness and height as the second drive magnet and may have a different width.

A first magnet located on one side of the bobbin; And a sensor unit disposed in the housing and sensing a position of the first magnet, wherein the first magnet is positioned to face a first spacing space forming the first spacing distance, May be longer than the second separation distance.

The first magnet may be positioned so as not to face the second driving unit.

Wherein the housing includes a first side on which the first drive magnet is located, a second side on which the second drive magnet is located, and a corner on which the first side and the second side meet, The one magnet may be positioned to face the corner portion.

Wherein the housing includes a first side on which the first drive magnet is located, a second side on which the second drive magnet is located, and a corner on which the first side and the second side meet, One magnet is positioned to face the first side, and the orthogonality to the first side of the first magnet may not overlap with the first drive magnet.

And a second magnet located on the other side of the bobbin.

The first magnet and the second magnet may be separated by a distance corresponding to the center of the bobbin.

The center of the bobbin may be located on an imaginary line connecting the first magnet and the second magnet.

The first magnet and the second magnet may have corresponding shapes and sizes.

The first magnet and the second magnet may be positioned so as to form a magnetic force balance or a weight balance between them.

The camera module according to the present embodiment may include a first movable part including a first driving part and a bobbin on which the first driving part is located; A second driving unit for moving the first driving unit through an electromagnetic interaction with the first driving unit, and a second mover including a housing in which the second driving unit is located; And a third driving unit for moving the second driving unit through an electromagnetic interaction with the second driving unit, wherein the second driving unit includes a first driving magnet and a second driving unit that is located adjacent to the first driving magnet A third drive magnet disposed adjacent to the second drive magnet, and a fourth drive magnet disposed adjacent to the third drive magnet, wherein a size of the first drive magnet is different from a size of the second drive magnet, The size of the magnet can be different.

The first distance between the first drive magnet and the second drive magnet may be different from the second distance between the second drive magnet and the third drive magnet.

A first magnet located on one side of the bobbin; And a sensor unit disposed in the housing and sensing a position of the first magnet, wherein the first magnet is positioned to face a first spacing space forming the first spacing distance, May be longer than the second separation distance.

Wherein the first driving unit includes a coil and a control unit for moving the first mover with respect to the second mover by applying power to the coil, And the power applied to the coil can be controlled.

The optical apparatus according to the present embodiment includes a main body, a display unit disposed on one side of the main body to display information, and a camera module mounted on the main body to photograph an image or a photograph, A first movable part including a first driving part and a bobbin on which the first driving part is located; A second driving unit for moving the first driving unit through an electromagnetic interaction with the first driving unit, and a second mover including a housing in which the second driving unit is located; And a third driving unit for moving the second driving unit through electromagnetic interaction with the second driving unit, wherein a size of the first driving magnet may be different from a size of the second driving magnet.

The present invention can provide a precise autofocus function, an image stabilization function, an autofocus feedback function, and / or a camera shake correction feedback function.

1 is a perspective view of a lens driving unit according to an embodiment of the present invention.
2 is an exploded perspective view of a lens driving unit according to an embodiment of the present invention.
3 is a plan view showing a part of a lens driving unit according to an embodiment of the present invention.
Fig. 4 is a plan view showing the lens driving unit of Fig. 3 with the housing omitted. Fig.
5 is a cross-sectional view taken along line L1-L2 in FIG.
6 is a conceptual diagram showing a lens driving unit according to an embodiment and a modification of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

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 intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

As used herein, the term "PCB" refers to a printed circuit board as an abbreviation of a printed circuit board. In the following description, "FPCB" refers to a flexible printed circuit board as an abbreviation of a flexible printed circuit board.

Hereinafter, a configuration of an optical apparatus according to an embodiment of the present invention will be described.

The optical apparatus according to an exemplary embodiment of the present invention may be applied to a mobile phone, a mobile phone, a smart phone, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants) Portable Multimedia Player), navigation, and the like, but is not limited thereto, and any device for capturing images or photographs is possible.

An optical apparatus according to an embodiment of the present invention includes a main body (not shown), a display unit (not shown) disposed on one side of the main body to display information, (Not shown) having a module (not shown).

Hereinafter, the configuration of the camera module will be described.

The camera module further includes a lens driving unit 10, a lens module (not shown), an infrared cut filter (not shown), a printed circuit board (not shown), an image sensor (not shown), and a control unit .

The lens module may include one or more lenses (not shown) and a lens barrel for accommodating the one or more lenses. However, one configuration of the lens module is not limited to the lens barrel, and any structure can be used as long as it can support one or more lenses. The lens module can be coupled to the lens driving unit 10 and move together with the lens driving unit 10. [ The lens module can be screwed with the lens driving unit 10 as an example. The lens module may be coupled to the inside of the lens driving unit 10 as an example. On the other hand, the light having passed through the lens module can be irradiated to the image sensor.

The infrared cutoff filter can block the light of the infrared region from entering the image sensor. The infrared cut filter may be located, for example, between the lens module and the image sensor. The infrared cut filter may be installed in a base 500 to be described later, and may be coupled to a holder member (not shown). The infrared filter may be mounted in a hollow hole 510 formed at the center of the base 500. The infrared filter may be formed of a film material or a glass material as one embodiment. On the other hand, the infrared ray filter may be formed by coating an infrared ray blocking coating material on a plate-shaped optical filter such as a cover glass for protecting an image pickup surface or a cover glass.

The printed circuit board can support the lens driving unit 10. [ An image sensor may be mounted on the printed circuit board. More specifically, the lens driving unit 10 is disposed on the upper portion of the printed circuit board and the image sensor can be positioned on the upper surface of the printed circuit board. A sensor holder (not shown) may be coupled to the outside of the upper surface of the printed circuit board, and a lens driving unit may be coupled to the sensor holder. Through the above structure, light having passed through the lens module housed inside the lens driving unit 10 can be irradiated to the image sensor mounted on the printed circuit board. The printed circuit board can supply power to the lens driving unit 10. [ On the other hand, a control unit for controlling the lens driving unit 10 may be disposed on the printed circuit board.

The image sensor may be mounted on a printed circuit board. The image sensor may be positioned such that the optical axis and the lens module are aligned. Thereby, the image sensor can acquire light passing through the lens module. The image sensor can output the irradiated light as an image. The image sensor can be, for example, a charge coupled device (CCD), a metal oxide semiconductor (MOS), a CPD and a CID. However, the type of image sensor is not limited thereto.

The control unit may be mounted on a printed circuit board. Alternatively, the control unit may be located inside the lens driving unit 10. [ The control unit can control the direction, intensity, and amplitude of the current supplied to each of the components constituting the lens driving unit 10. [ The control unit controls the lens driving unit 10 to perform at least one of the autofocus function and the camera shake correction function of the camera module. That is, the control unit can control the lens driving unit 10 to move the lens module in the optical axis direction or tilt it in the direction perpendicular to the optical axis direction. Further, the control unit may perform feedback control of the autofocus function and the shake correction function. More specifically, the controller receives the position of the first magnet 810 sensed by the second sensor unit 900, and controls the power or current applied to the first driver 220 or the second driver 320 .

Hereinafter, the configuration of the lens driving unit 10 will be described in detail with reference to the drawings.

1 is a perspective view of a lens driving unit according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a lens driving unit according to an embodiment of the present invention, FIG. 3 is a perspective view of a lens driving unit according to an embodiment of the present invention, FIG. 4 is a plan view showing a part of the unit, FIG. 4 is a plan view showing the lens driving unit of FIG. 3 omitting the housing, FIG. 5 is a sectional view seen from L1-L2 in FIG. 1, Fig. 8 is a conceptual diagram showing a lens driving unit according to an example and a modification. Fig.

1 to 7, a lens driving unit 10 according to an embodiment of the present invention includes a cover member 100, a first mover 200, a second mover 300, a stator 400 A base 500, a support member 600, and a first sensor unit 700. In the lens driving unit 10 according to an embodiment of the present invention, the cover member 100, the first mover 200, the second mover 300, the stator 400, the base 500, At least one of the member 600 and the first sensor unit 700 may be omitted.

The cover member 100 can form an appearance of the lens driving unit 10. [ The cover member 100 may be in the form of a hexahedron having an open bottom. However, the present invention is not limited thereto. The cover member 100 may include an upper surface 101 and side surfaces 102 extending downward from the outer side of the upper surface 101. On the other hand, the cover member 100 can be mounted on the upper portion of the base 500. The first mover 200, the second mover 300, the stator 400, and the support member 600 may be positioned in the inner space defined by the cover member 100 and the base 500. [ The cover member 100 may be mounted on the base 500 in close contact with a part or all of the side surface of the base 500 to be described later. With such a structure, the cover member 100 can protect the internal components from an external impact and have a function of preventing external contaminants from penetrating.

The cover member 100 may be formed of a metal material as an example. More specifically, the cover member 100 may be formed of a metal plate. In this case, the cover member 100 can block radio interference. That is, the cover member 100 can prevent the airflow generated from the outside of the lens driving unit 10 from flowing into the cover member 100. In addition, the cover member 100 can prevent the radio waves generated inside the cover member 100 from being emitted to the outside of the cover member 100. However, the material of the cover member 100 is not limited thereto.

The cover member 100 may include an opening 110 formed in the upper surface 101 to expose the lens module. The opening 110 may be formed in a shape corresponding to the lens module. The size of the opening 110 may be larger than the diameter of the lens module so that the lens module can be assembled through the opening 110. Further, the light introduced through the opening 110 can pass through the lens module. On the other hand, light having passed through the lens module can be transmitted to the image sensor.

The first mover 200 may include a bobbin 210 and a first driving unit 220. The first movable element 200 may be combined with a lens module (which may be described as a component of the lens driving unit 10), which is a component of the camera module. That is, the lens module may be located inside the first mover 200. In other words, the outer peripheral surface of the lens module can be coupled to the inner peripheral surface of the first movable element 200. On the other hand, the first movable element 200 can flow integrally with the lens module through interaction with the second movable element 300. That is, the first movable element 200 can move the lens module.

The first movable element 200 may include a bobbin 210. The first mover 200 may include a first driving unit 220 coupled to the bobbin 210.

The bobbin 210 may be coupled to a lens module. More specifically, the outer circumferential surface of the lens module may be coupled to the inner circumferential surface of the bobbin 210. Meanwhile, the first driving unit 220 may be coupled to the bobbin 210. The lower portion of the bobbin 210 may be coupled to the lower support member 620 and the upper portion of the bobbin 210 may be coupled to the upper support member 610. The bobbin 210 may be located inside the housing 310. The bobbin 210 can flow relatively to the housing 310 in the direction of the optical axis.

The bobbin 210 may include a lens coupling portion 211 formed inside. The lens coupling unit 211 may be coupled with a lens module. A screw thread having a shape corresponding to the thread formed on the outer circumferential surface of the lens module may be formed on the inner circumferential surface of the lens coupling portion 211. [ That is, the outer circumferential surface of the lens module can be screwed to the inner circumferential surface of the lens coupling portion 211.

The bobbin 210 may include a first driving portion coupling portion 212 through which the first driving portion 220 is wound or mounted. The first driving portion coupling portion 212 may be formed integrally with the outer surface of the bobbin 210. [ The first driving part coupling part 212 may be continuously formed along the outer surface of the bobbin 210 or spaced apart from the bobbin 210 at predetermined intervals. The first driving portion coupling portion 212 may include a depression formed by recessing a part of the outer surface of the bobbin 210. The first driving unit 220 may be positioned on the first driving unit 210 and the first driving unit 220 located on the first driving unit 210 may form a part of the first driving unit 210. As shown in Fig.

The bobbin 210 may include an upper engagement portion 213 coupled with the upper support member 610. The upper engagement portion 213 can be engaged with the inner side portion 612 of the upper support member 610. As an example, the upper coupling portion 213 provided as a protrusion may be inserted into the groove or the hole of the inner side portion 612 and coupled thereto. On the other hand, protrusions may be provided on the upper support member 610, and grooves or holes may be formed on the bobbin 210 so that both are coupled. Meanwhile, the bobbin 210 may include a lower coupling portion (not shown) coupled to the lower support member 620. The lower coupling portion formed at the lower portion of the bobbin 210 may be coupled to the inner side portion 622 of the lower support member 620. As an example, the lower engaging portion provided as a protrusion can be inserted into the groove or the hole of the inner side portion 622 to be engaged.

The first driving unit 220 may be positioned opposite to the second driving unit 320 of the second mover 300. The first driving unit 220 can move the bobbin 210 with respect to the housing 310 through the electromagnetic interaction with the second driving unit 320. The first driving unit 220 may include a coil. The coil may be wound on the outer surface of the bobbin 210 by being guided by the first driving portion engaging portion 212. In another embodiment, the coils may be disposed on the outer surface of the bobbin 210 such that the four coils are independently provided so that the adjacent two coils are at 90 degrees to each other. When the first driving unit 220 includes a coil, the power supplied to the coil may be supplied through the lower supporting member 620. At this time, the lower supporting member 620 may be provided as a pair for power supply to the coils. Meanwhile, the first driving unit 220 may include a pair of lead wires (not shown) for supplying power. In this case, each of the pair of outgoing lines of the first driving unit 220 may be electrically coupled to each of the pair of lower supporting members 620. On the other hand, when power is supplied to the coil, an electromagnetic field may be formed around the coil. Further, in another embodiment, the first driving unit 220 may include a magnet. In this case, the second driving unit 320 may be provided as a coil.

The second mover 300 may be located outside the first mover 200 and opposed to the first mover 200. The second mover 300 can be supported by the base 500 positioned on the lower side. The second mover 300 may be located in the inner space of the cover member 100. [

The second mover 300 may include a housing 310 located outside the bobbin 210. The second mover 300 may include a second driving unit 320 positioned opposite to the first driving unit 220 and fixed to the housing 310.

The housing 310 may be formed in a shape corresponding to the inner surface of the cover member 100 forming the outer appearance of the lens driving unit 10. [ In addition, the housing 310 is formed of an insulating material, and may be formed as an injection molded article in consideration of productivity. The housing 310 may be disposed at a distance from the cover member 100 as a moving part for OIS (Optical Image Stabilization) driving. However, in the AF model, the housing 310 can be fixed on the base 500. In addition, in the AF model, the housing 310 may be omitted, and a magnet provided as the second driving unit 320 may be fixed to the cover member 100. [

The upper and lower sides of the housing 310 are opened to accommodate the first mover 200 so as to be movable up and down. The housing 310 may include an inner space 311 which is vertically open on the inner side. The first mover 200 can be movably positioned in the inner space 311. That is, the inner space 311 may have a shape corresponding to that of the first mover 200. The outer circumferential surface of the inner space 311 may be spaced apart from the outer circumferential surface of the first mover 200.

The housing 310 may include a second driving part coupling part 312 formed on the side surface of the second driving part 320 and corresponding to the second driving part 320 to receive the second driving part 320. That is, the second driving part engaging part 312 can receive and fix the second driving part 320. The second driving part 320 may be fixed to the second driving part coupling part 312 by an adhesive (not shown). Meanwhile, the second driving portion engaging portion 312 may be located on the inner peripheral surface of the housing 310. In this case, there is an advantage in favor of electromagnetic interaction with the first driving unit 220 located inside the second driving unit 320. In addition, the second driving portion engaging portion 312 may be in the form of an open bottom portion as an example. In this case, there is an advantage in favor of the electromagnetic interaction between the third driving unit 420 and the second driving unit 320 located below the second driving unit 320. The second driving portion coupling portion 312 may be provided as four, for example. The second driving unit 320 may be coupled to each of the four second driving unit engaging portions 312.

An upper support member 610 may be coupled to the upper portion of the housing 310 and a lower support member 620 may be coupled to the lower portion of the housing 310. The housing 310 may include an upper engagement portion 313 coupled with the upper support member 610. The upper engagement portion 313 can be engaged with the outer side portion 611 of the upper support member 610. As an example, the upper coupling portion 313 provided as a projection may be inserted into the groove or the hole of the outer side portion 611 and coupled thereto. Meanwhile, in another embodiment, protrusions are provided on the upper support member 610 and grooves or holes are provided in the housing 310 so that they can be coupled. Meanwhile, the housing 310 may include a lower coupling portion (not shown) coupled with the lower supporting member 620. The lower coupling portion formed at the lower portion of the housing 310 can be engaged with the outer portion 621 of the lower supporting member 620. [ As an example, the lower coupling portion provided as a projection may be inserted into the groove or the hole of the outer side portion 621 and coupled.

The second driving unit 320 may be positioned opposite to the first driving unit 220 of the first mover 200. The second driving unit 320 can move the first driving unit 220 through the electromagnetic interaction with the first driving unit 220. The second driving unit 320 may include a magnet. The magnet may be fixed to the second driving portion engaging portion 312 of the housing 310. As shown in FIG. 2, for example, the second driving unit 320 may be disposed in the housing 310 such that four magnets are independently provided and two adjacent magnets are disposed at an angle of 90 ° with respect to each other. That is, the second driving unit 320 can be equally spaced on the four side surfaces of the housing 310, so that the internal volume can be efficiently used. The second driving unit 320 may be attached to the housing 310 with an adhesive or the like, but is not limited thereto. Meanwhile, the first driving unit 220 may include a magnet, and the second driving unit 320 may include a coil.

The stator 400 may be positioned so as to face the lower side of the second mover 300. On the other hand, the stator 400 can move the second mover 300. In addition, the through holes 411 and 421 corresponding to the lens module may be located at the center of the stator 400. [

The stator 400 may include a circuit board 410 positioned between the third driver 420 and the base 500. In addition, the stator 400 may include a third driving unit 420 positioned opposite to the lower side of the second driving unit 320.

The circuit board 410 may include a flexible printed circuit board (FPCB) which is a flexible circuit board. The circuit board 410 may be positioned between the third driver 420 and the base 500. On the other hand, the circuit board 410 can supply power to the third driver 420. The circuit board 410 can supply power to the first driving unit 220 through the side support member 630, the upper support member 610, the energizing member 640 and the lower support member 620. [ The circuit board 410 may have a through hole 411 through which light passing through the lens module is passed. In addition, the circuit board 410 may include a terminal portion 412 that is bent and exposed to the outside. The terminal portion 412 may be connected to an external power source, and power may be supplied to the circuit board 410 through the terminal portion 412.

The third driving unit 420 may include a coil. When the power of the coil of the third driving part 420 is applied, the housing 310, to which the second driving part 320 and the second driving part 320 are fixed, moves integrally with the second driving part 320 have. The third driving unit 420 may be mounted on the circuit board 410 or electrically connected thereto. Meanwhile, the third driving unit 420 may include a through hole 421 through which light of the lens module is passed. In consideration of the downsizing of the lens driving unit 10 (that is, the height in the z-axis direction in the optical axis direction), the third driving unit 420 is formed of an FP coil, which is a patterned coil, (Not shown).

The base 500 can support the second mover 300. A printed circuit board may be positioned below the base 500. The base 500 may include a through hole 510 formed at a position corresponding to the lens coupling portion 211 of the bobbin 210. The base 500 may perform a sensor holder function to protect the image sensor. On the other hand, the base 500 may be provided with an infrared ray filter. An infrared ray filter may be coupled to the through hole 510 of the base 500.

The base 500 may include a foreign matter collecting unit 520 for collecting foreign matter introduced into the cover member 100 as an example. The foreign matter collecting unit 520 is disposed on the upper surface of the base 500 and can collect foreign substances on the inner space formed by the cover member 100 and the base 500 including the adhesive material. The base 500 may include a sensor mounting portion 530 to which the first sensor portion 700 is coupled. That is, the first sensor unit 700 can be mounted on the sensor mounting unit 530. At this time, the first sensor unit 700 senses the horizontal movement of the housing 310 by detecting the second driving unit 320 coupled to the housing 310. Two sensor mounting portions 530 may be provided as an example. The first sensor unit 700 may be positioned in each of the two sensor mounts 530. In this case, the first sensor unit 700 may be arranged to sense both the movement of the housing 310 in the x-axis direction and the y-axis direction.

The support member 600 can connect any two or more of the first mover 200, the second mover 300, and the base 500. The support member 600 may elastically connect any two or more of the first mover 200, the second mover 300 and the base 500 to allow relative movement between the respective components have. That is, the support member 600 may be provided as an elastic member. The support member 600 may include an upper support member 610, a lower support member 620, a side support member 630 and an energizing member 640 as shown in Fig. The energizing member 640 is provided for energizing the upper support member 610 and the lower support member 620 and includes an upper support member 610, a lower support member 620, and a side support member 630, Can be explained separately.

The upper support member 610 may include an outer portion 611, a medial portion 612, and a connection portion 613 as an example. The upper support member 610 includes an outer portion 611 coupled with the housing 310, a medial portion 612 coupled with the bobbin 210, and a connection portion 612 elastically connecting the outer portion 611 and the medial portion 612 613).

The upper support member 610 may be connected to the upper portion of the first mover 200 and the upper portion of the second mover 300. More specifically, the upper support member 610 may be coupled to the upper portion of the bobbin 210 and the upper portion of the housing 310. The inner side portion 612 of the upper side support member 610 is engaged with the upper side coupling portion 213 of the bobbin 210 and the outer side portion 611 of the upper side support member 610 is coupled to the upper side coupling portion 313 of the housing 310, ≪ / RTI >

The upper support member 610 may be divided into six as one embodiment. At this time, two of the six upper supporting members 610 are energized with the lower supporting member 620 and can be used to apply power to the first driving unit 220. Each of the two upper side support members 610 may be electrically connected to each of the pair of lower side support members 620a and 620b through a conductive member 640. [ Meanwhile, the remaining four of the six upper support members 610 may be used to supply power to the second sensor unit 900 and transmit / receive information or signals between the control unit and the second sensor unit 900 . In addition, two of the six upper support members 610 may be directly connected to the first driving unit 220 and four may be connected to the second sensor 900 as a modification.

The lower support member 620 may include a pair of lower support members 620a and 620b as an example. That is, the lower support member 620 may include a first lower support member 620a and a second lower support member 620b. Each of the first lower support member 620a and the second lower support member 620b may be connected to each of a pair of outgoing lines of the first drive unit 220 provided as a coil to supply power. On the other hand, the pair of lower side support members 620 can be electrically connected to the circuit board. With such a structure, the pair of lower support members 620 can supply power to the first driver 220 from the circuit board.

The lower support member 620 may include an outer portion 621, a medial portion 622, and a connection portion 623 as an example. The lower support member 620 includes an outer side portion 621 coupled with the housing 310, an inner side portion 622 coupled with the bobbin 210, and a connecting portion 622 elastically connecting the outer side portion 621 and the inner side portion 622 623).

The lower support member 620 may be connected to a lower portion of the first mover 200 and a lower portion of the second mover 300. More specifically, the lower support member 620 may be coupled to the lower portion of the bobbin 210 and the lower portion of the housing 310. The lower coupling portion of the bobbin 210 may be coupled to the inner side portion 622 of the lower support member 620 and the lower coupling portion of the housing 310 may be coupled to the outer side portion 621 of the lower side support member 620.

One end of the side support member 630 may be fixed to the stator 400 or the base 500 and the other end may be coupled to the upper support member 610 or the second mover 300. One side of the side support member 630 may be coupled to the base 500 and the other side may be coupled to the second mover 300 as an example. In another embodiment, the side support member 630 may be coupled to the stator 400 at one side and the upper side support member 610 at the other side. In this way, the side support member 630 elastically supports the second mover 300, so that the second mover 300 can be moved in a horizontal direction or tilted.

The side support members 630 may be provided in the same number as the upper side support members 610 as an example. That is, the side support members 630 may be connected to each of the six upper support members 610 provided in six. In this case, the side support members 630 can supply the power supplied from the stator 400 or the outside to the upper side support members 610, respectively. The number of side support members 630 can be determined in consideration of symmetry as an embodiment. As shown in FIG. 2, eight lateral supporting members 630 may be provided at two corners of the housing 310, respectively.

The side support member 630 or the upper side support member 610 may include a structure for shock absorption as an example. The shock absorbing structure may be provided on at least one of the side support member 630 and the upper side support member 610. [ The configuration for shock absorption may be a separate member such as a damper. Further, the configuration for absorbing the shock may be realized by changing the shape of any one of the side support member 630 and the upper side support member 610.

The energizing member 640 can electrically connect the upper side support member 610 and the lower side support member 620. The energizing member 640 may be separately provided from the side support member 630. [ The power supplied to the upper side support member 610 through the energizing member 640 may be supplied to the lower side support member 620 and the power may be supplied to the first drive unit 220 through the lower side support member 620. [ On the other hand, when the upper support member 610 is directly connected to the first driving unit 220 as a modification, the energizing member 640 may be omitted.

The first sensor unit 700 may be used for at least one of AF (Auto Focus) feedback and OIS (Optical Image Stabilization) feedback. That is, the first sensor unit 700 can detect the position or movement of any one of the first mover 200 and the second mover 300. As an example, the first sensor unit 700 may detect horizontal movement or tilt of the second mover 300 and provide information for OIS feedback.

The first sensor unit 700 may be located in the stator 400. The first sensor unit 700 may be disposed on the upper surface or the lower surface of the circuit board 410 of the stator 400. The first sensor unit 700 may be disposed on the sensor mounting portion 530 formed on the bottom surface of the circuit board as an embodiment. The first sensor unit 700 may include a Hall sensor as one embodiment. In this case, the relative motion of the second mover 300 with respect to the stator 400 can be sensed by sensing the magnetic field of the second driving unit 320 of the second mover 300. The first sensor unit 700 may include two or more sensors, for example, and may sense both the x-axis and y-axis motions of the second mover 300.

The lens driving unit 10 according to an embodiment of the present invention includes a first movable part 200 including a first driving part 220 and a bobbin 210 in which the first driving part 220 is located, A second driving part 320 for moving the first driving part 220 through an electromagnetic interaction with the first driving part 220 and a second movable part 320 including the housing 310 in which the second driving part 320 is located, And a third driving unit 420 for moving the second driving unit 320 through electromagnetic interaction with the first driving unit 300 and the second driving unit 320. The stator 400 includes a stator 400 disposed on one side of the bobbin 210, A second sensor unit 900 positioned at the housing 310 to sense the position of the first magnet 810 and a second magnet 820 located at the other side of the bobbin 210 can do.

The bobbin 210 may include a first outer circumferential surface 215, a third outer circumferential surface 217, and a second circumferential surface 216 that are continuously disposed. The housing 310 includes a first side surface 315 opposed to the first outer circumferential surface 215, a second side surface 316 opposed to the second outer circumferential surface 216, a second side surface 316 opposed to the third circumferential surface 217, And may include a corner portion 319 which is formed on the outer circumferential surface thereof. The housing 310 includes a first side 315 and a second side 316 adjacent to the first side 315 and a second side 316 adjacent the first side 315. The first side 315 and the second side 316, Lt; RTI ID = 0.0 > 319 < / RTI > The bobbin 210 includes a first outer circumferential surface 215 opposed to the first side surface 315 and a second outer circumferential surface 216 opposed to the second side surface 316 and a second outer circumferential surface 216 opposed to the corner portion 319 And a third outer circumferential surface 217. At this time, the first magnet 810 may be positioned on the third outer circumferential surface 217 of the bobbin 210. The second driving unit 320 may include a magnet disposed on the first side 315 and the second side 316 of the housing 310. The housing 310 may include successively adjacent first side 315, second side 316, third side 317 and fourth side 318.

The second driving unit 320 may include a first driving magnet 321, a second driving magnet 322, a third driving magnet 323, and a fourth driving magnet 324. At this time, the first drive magnet 321 is located on the first side 315, the second drive magnet 322 is located on the second side 316, the third drive magnet 323 is located on the third side 317, And the fourth drive magnet 324 may be located on the fourth side 318. [ The distance C1 between the third drive magnet 323 and the fourth drive magnet 324 corresponds to the distance A1 between the first drive magnet 321 and the second drive magnet 322 . The distance D1 between the fourth drive magnet 324 and the first drive magnet 321 corresponds to the distance B1 between the second drive magnet 322 and the third drive magnet 323 .

The second driving unit 320 may include first to fourth driving magnets 321, 322, 323, and 324. At this time, the first drive magnet 321 and the third drive magnet 323 may be located on the opposite sides, and the second drive magnet 322 and the fourth drive magnet 324 may be located on the opposite sides. It may also be described that the first drive magnet 321 and the third drive magnet 323 are opposed to each other and the second drive magnet 322 and the fourth drive magnet 324 are opposed to each other. The opposing first and third drive magnets 321 and 323 may have the same shape. Similarly, the second and fourth drive magnets 322 and 324 may be provided in the same shape. Meanwhile, all of the first to fourth drive magnets 321, 322, 323, and 324 may have the same shape.

The first magnet 810 may be positioned so as not to face the second driving part 320 provided as a magnet. That is, the orthogonal projection of the first magnet 810 to the housing 320 may not overlap with the second driving unit 320. In other words, the first magnet 810 may be arranged to minimize the magnetic force applied to the second driving unit 320. [ The first magnet 810 may be located on the third outer circumferential surface 217 of the bobbin 210 as shown in FIG. 6 (a). That is, the first magnet 810 may be positioned on the bobbin 210 so as to face the corner portion 319 of the housing 310.

The first magnet 810 may be spaced apart from the first driving part 220 in a direction corresponding to the optical axis direction of the lens module coupled to the inside of the bobbin 210. The first magnet 810 may be spaced apart from the second driving unit 320 in a direction corresponding to the optical axis direction of the lens module.

The first magnet 810 may be located in a seating groove 214 formed in the bobbin 210. The seating groove 214 may be a bottom open or an open top. At this time, the first magnet 810 may have N poles and S poles on its upper and lower surfaces. In this case, the first magnet 810, which is one of the plurality of first magnets 810 connected to each other so that the N pole and the S pole are alternately arranged, is pushed into the upper or lower opening, And can be coupled to the seating groove 214. Therefore, in this case, the convenience of the process of coupling the first magnet 810 to each of the plurality of bobbins 210 can be improved. The seating groove 214 may be a vertically-closed type in which a part of the outer circumferential surface is recessed inward. At this time, the first magnet 810 may have N poles and S poles on its side surfaces. In this case, the first magnet 810 is inserted into the seating groove 214 (see FIG. 2) in such a manner that the first magnet 810 of one of the plurality of first magnets 810 connected so that the N pole and the S pole are alternately positioned, ). ≪ / RTI > Therefore, in this case, the convenience of the process of coupling the first magnet 810 to each of the plurality of bobbins 210 can be improved.

The second magnet 820 may be referred to as a symmetrical magnet or a complementary magnet because it is arranged symmetrically with respect to the first magnet 810 so as to form a magnetic balance or a weight balance. The second magnet 820 may be provided for magnetic force balance with the first magnet 810. The first magnet 810 and the second magnet 820 may be positioned such that the magnetic force applied to the first driving unit 220 or the second driving unit 320 is balanced. That is, the second magnet 820 may be provided to prevent the first magnet 810 from affecting the electromagnetic interaction between the first, second, and third driving units 220, 320, 420. Alternatively, the second magnet 820 compensates for the electromagnetic interaction between the first to third driving units 220, 320, and 420, so that the AF and / or OIS function For example.

The first magnet 810 and the second magnet 820 may be positioned to overlap with the second driving unit 220 in the horizontal direction. The first magnet 810 and the second magnet 820 may be positioned so as not to overlap with the second drive unit 220 in the horizontal direction. The first magnet 810 may be positioned to overlap with the sensor 910 in the horizontal direction. Further, the first magnet 810 may be positioned so as not to overlap with the sensor 910 in the horizontal direction. The first magnet 810 and the second magnet 820 may be positioned so as to overlap with the upper side support member 610 and / or the lower side support member 620 in the vertical direction. More specifically, the first magnet 810 and the second magnet 820 are positioned so as to vertically overlap with the connection portion 613 of the upper support member 610 and / or the connection portion 623 of the lower support member 620 can do.

The first magnet 810 and the second magnet 820 may be positioned such that the magnetic force applied to the cover member 100 made of metal is in equilibrium. In addition, the first magnet 810 and the second magnet 820 may be positioned so that the magnetic force applied to the metal supporting member 600 is in an equilibrium state. That is, the first magnet 810 may be located on one side of the mover 200 and the second magnet 820 may be on the other side of the first mover 200. The first magnet 810 and the second magnet 820 may be positioned symmetrically with respect to the center of the bobbin 210. That is, the first magnet 810 and the second magnet 820 may be positioned symmetrically with respect to the optical axis of the lens module. In other words, the first magnet 810 and the second magnet 820 can be positioned to be symmetrical with respect to the optical axis of the lens driving unit 10. [ The first magnet 810 and the second magnet 820 may have corresponding shapes and sizes. The second magnet 820 may be located in a second magnet seating groove (not shown) located on the outer circumferential surface of the bobbin 210.

The second magnet 820 may be provided in plurality as an example. In this case, the plurality of second magnets 820 can be arranged such that the influence of the magnetic force provided by the plurality of second magnets 820 and the first magnets 810 is balanced.

The first magnet 810 and the second magnet 820 may be spaced a distance corresponding to the center of the bobbin 210. The center of the bobbin 210 may be located on an imaginary line connecting the first magnet 810 and the second magnet 820. That is, the first magnet 810 and the second magnet 820 may be positioned symmetrically with respect to the center of the bobbin 210. The first magnet 810 and the second magnet 820 may have corresponding shapes and sizes. The first magnet 810 and the second magnet 820 may be positioned so as to form a magnetic force balance therebetween.

The second sensor unit 900 can detect the position of the first magnet 810. The control unit (not shown) receives the position of the first magnet 810 sensed by the second sensor unit 900 and controls the power applied to the first driving unit 220 provided as a coil. That is, the position of the first magnet 810 sensed by the second sensor unit 900 can be used to perform the AF feedback function. The second sensor unit 900 may be positioned at the corner 319 of the housing 310.

The second sensor unit 900 may include a sensor 910 for sensing the first magnet 810 and a circuit board 920 on which the sensor 910 is mounted. The sensor 910 may be, for example, a hall sensor for sensing the magnetic force of the magnet. The circuit board 920 may be fixed to the outside of the housing 310 as an example, but is not limited thereto. The circuit board 920 may be directly connected to the circuit board 410 of the stator 400 or may be connected to the side support member 630 via the upper support member 610. [ The sensor 910 can be powered on via the circuit board 920 and can communicate control signals with the sensing value. The second sensor unit 900 may be spaced apart from the second driving unit 320 in a direction corresponding to the optical axis direction of the lens module. That is, the second sensor unit 900 may be positioned so as to overlap with the normal projection of the first magnet 810 to the housing 310.

Hereinafter, a lens driving unit according to a modification of the present invention will be described with reference to FIG.

6A, in the lens driving unit according to an embodiment of the present invention, the first magnet 810 is spaced apart from the first driving magnet 321 and the second driving magnet 322 by a distance between the first driving magnet 321 and the second driving magnet 322, As shown in FIG. More specifically, the first magnet 810 may be positioned so as to face the corner portion 319 of the housing 310. A virtual line connecting the center of the first driving magnet 321 and the center X of the housing 310 and a virtual line connecting the center of the second driving magnet 322 and the center X of the housing 310 The angle at which the imaginary line meets may be a right angle.

6 (b), in the lens driving unit according to the modification of the present invention, the first magnet 810 is positioned so as to face the corner portion 319 of the housing 310 as in the previous embodiment Is the same. 6B, when the first distance A2 between the first drive magnet 321 and the second drive magnet 322 is smaller than the second distance between the second drive magnet 322 and the third drive magnet 322, May be longer than the second spacing distance B2 between the second spacing 323. That is, the first separation distance A2 of the first separation space facing the first magnet 810 may be longer than the second separation distance B2. In this case, the influence of the magnetic force exerted by the first magnet 810 on the second driving unit 320 can be minimized.

In the lens driving unit according to the modified embodiment of the present invention, a virtual line connecting the center of the first driving magnet 321 and the center of the housing 310, the center of the second driving magnet 322, ) May form an acute angle or an obtuse angle. 6 (b), a virtual line connecting the center of the first drive magnet 321 and the center of the housing 310 and the virtual line connecting the center of the second drive magnet 322 and the center of the housing 310 The angle? 2 at which an imaginary line extending from the center of the center line 310 meets the obtuse angle may be an obtuse angle.

Referring to FIG. 6C, in the lens driving unit according to another modification of the present invention, the first magnet 810 may be positioned on the first outer circumferential surface 215 of the bobbin 210. At this time, the first magnet 810 may be biased toward the third outer circumferential surface 217 side. In this case, too, the orthogonality of the first magnet 810 to the housing 310 may not overlap with the second driving unit 320. That is, the first magnet 810 may be positioned so as to be spaced apart from the second driver 320 in the vertical direction (optical axis direction of the lens module).

6D, the first magnet 810 may be positioned on the first outer circumferential surface 215 of the bobbin 210 in the lens driving unit according to another modification of the present invention. At this time, the first magnet 810 may be biased toward the third outer circumferential surface 217 side. Meanwhile, the second driving unit 320 may include first to fourth driving magnets 321, 322, 323, and 324. At this time, the first drive magnet 321 and the third drive magnet 323 may be located on the opposite sides, and the second drive magnet 322 and the fourth drive magnet 324 may be located on the opposite sides. It may also be described that the first drive magnet 321 and the third drive magnet 323 are opposed to each other and the second drive magnet 322 and the fourth drive magnet 324 are opposed to each other. At this time, the opposing first and third driving magnets 321 and 323 may have the same shape. Similarly, the second and fourth drive magnets 322 and 324 may be provided in the same shape. However, the first drive magnet 321 may be provided in a different shape from the second drive magnet 322. As an example, the first drive magnet 321 may be smaller than the second drive magnet 322 as shown in FIG. 6 (d). More specifically, the first drive magnet 321 may have the same thickness and height as the second drive magnet 322, and may have different widths W1 and W2. The width W1 of the first drive magnet 321 may be longer than the width W2 of the second drive magnet 322 as shown in Fig. That is, the second driving magnet 322 may be a shape in which a part of the width of the first driving magnet 321 is omitted. At this time, the first magnet 810 may be positioned so as to be opposed to the portion where the second drive magnet 322 is omitted. That is, part of the second drive magnet 322 may be partially omitted in order to secure a space for disposing the first magnet 810. In this case, the magnetic force applied to the second driving unit 320 by the first magnet 810 can be minimized.

6 (a) to 6 (d), in an embodiment and modifications of the present invention, the distance between the third drive magnet 323 and the fourth drive magnet 324 A2, A3, A4 between the first drive magnet 321 and the second drive magnet 322 may correspond to the distances C1, C2, C3, C4. The distances D1, D2, D3 and D4 between the fourth drive magnet 324 and the first drive magnet 321 are different from each other between the second drive magnet 322 and the third drive magnet 323 Can correspond to distances B1, B2, B3, B4.

Hereinafter, operations and effects of a camera module according to an embodiment of the present invention will be described with reference to the drawings.

First, an autofocus function of a camera module according to an embodiment of the present invention will be described. When the power is supplied to the first driving unit 220 provided as a coil, the first driving unit 220 and the second driving unit 320, which are provided as a magnet, (320). ≪ / RTI > At this time, the bobbin 210 to which the first driving unit 220 is coupled moves integrally with the first driving unit 220. That is, the bobbin 210 coupled to the inner side of the lens module moves up and down with respect to the housing 310. Such movement of the bobbin 210 results in moving the lens module closer to the image sensor or moving away from the image sensor, so focus adjustment to the subject is performed.

On the other hand, autofocus feedback can be applied for more precise realization of the autofocus function of the camera module according to an embodiment of the present invention. More specifically, the first magnet 810 mounted on the bobbin 210 can be sensed by the second sensor unit 900. On the other hand, when the bobbin 210 moves relative to the housing 310, the amount of the magnetic field sensed by the second sensor unit 900 changes. The second sensor unit 900 senses the movement amount or position of the bobbin 210 in the z-axis direction in this manner and transmits the detection value to the control unit. The control unit determines whether to perform an additional movement with respect to the bobbin 210 through the received sensing value. Since such a process is generated in real time, the autofocus function of the camera module according to an embodiment of the present invention can be performed more precisely through autofocus feedback.

The camera shake correction function of the camera module according to an embodiment of the present invention will be described. When the power is supplied to the third driving part 420, the second driving part 320 is moved to the third driving part 420 by the electromagnetic interaction between the third driving part 420 and the second driving part 320 provided as a magnet Movement. At this time, the housing 310 coupled with the second driving unit 320 moves integrally with the second driving unit 320. That is, the housing 310 is moved in the horizontal direction with respect to the base 500. At this time, the tilting of the housing 310 with respect to the base 500 may be induced. This movement of the housing 310 is a result of the lens module moving in a direction parallel to the direction in which the image sensor is placed with respect to the image sensor, so that the camera shake correction function is performed.

Meanwhile, camera shake correction feedback may be applied for more precise realization of the camera shake correction function of the camera module according to an embodiment of the present invention. A pair of first sensor units 700 mounted on the base 500 and provided as hall sensors sense the magnetic field of the second driving unit 320 provided as a magnet fixed to the housing 310. On the other hand, when the housing 310 performs relative movement with respect to the base 500, the amount of the magnetic field sensed by the first sensor unit 700 changes. The pair of first sensor units 700 senses the movement amount or position of the housing 310 in the horizontal direction (x-axis and y-axis direction) in this way and transmits the sensed value to the control unit. The control unit determines whether to perform the additional movement to the housing 310 through the received sensing value. Since the above process is performed in real time, the camera shake correction function of the camera module according to one embodiment of the present invention can be performed more precisely through the camera shake correction feedback.

In the camera module according to an embodiment of the present invention, a first magnet 810 and a second sensor unit 900, which are position sensing structures of the bobbin 210 for performing an AF feedback function, are provided. Meanwhile, a second magnet 820 is provided for magnetic force balance with the first magnet 810. In addition, the first magnet 810 and the second driving part 320, which is formed of a magnet, are provided with an overlap preventing structure.

Through the above-mentioned structure, the camera module according to one embodiment and the modifications of the present invention can provide a more precise autofocus function by providing the autofocus feedback function.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: cover member 200: first movable member
300: second movable element 400: stator
500: base 600: support member
700: first sensor unit 810: first magnet
820: second magnet 900: second sensor unit

Claims (19)

A first movable part including a first driving part and a bobbin on which the first driving part is located;
A second driving unit for moving the first driving unit through an electromagnetic interaction with the first driving unit, and a second mover including a housing in which the second driving unit is located;
And a third driving unit for moving the second driving unit through electromagnetic interaction with the second driving unit,
The second driving unit includes a first driving magnet, a second driving magnet disposed adjacent to the first driving magnet, a third driving magnet disposed adjacent to the second driving magnet, And a fourth drive magnet disposed adjacent to the fourth drive magnet,
And the size of the first drive magnet is different from the size of the second drive magnet.
The method according to claim 1,
An imaginary line connecting the center of the first drive magnet and the center of the housing and an imaginary line connecting the center of the second drive magnet and the imaginary line connecting the center of the housing is an acute angle or an obtuse angle, .
The method according to claim 1,
Wherein the first distance between the first drive magnet and the second drive magnet is different from the second distance between the second drive magnet and the third drive magnet.
The method of claim 3,
The fourth drive magnet is located adjacent to the first drive magnet and the third drive magnet,
The distance between the third drive magnet and the fourth drive magnet corresponds to the first distance,
And the distance between the fourth drive magnet and the first drive magnet corresponds to the second distance.
5. The method of claim 4,
Wherein the first drive magnet has the same thickness and height as the second drive magnet and has a different width.
The method according to claim 1,
A first magnet located on one side of the bobbin; And
And a sensor unit disposed in the housing and sensing a position of the first magnet,
Wherein the first magnet is positioned to face a first spacing space defining the first spacing distance,
Wherein the first distance is longer than the second distance.
The method according to claim 6,
And the first magnet is positioned so as not to face the second driving unit.
The method according to claim 6,
Wherein the housing includes a first side on which the first drive magnet is located, a second side on which the second drive magnet is located, and a corner on which the first side and the second side meet,
And the first magnet is positioned to face the corner portion.
The method according to claim 6,
Wherein the housing includes a first side on which the first drive magnet is located, a second side on which the second drive magnet is located, and a corner on which the first side and the second side meet,
Wherein the first magnet is positioned to face the first side,
Wherein an orthogonal projection to the first side face of the first magnet does not overlap with the first drive magnet.
The method according to claim 6,
And a second magnet located on the other side of the bobbin.
11. The method of claim 10,
Wherein the first magnet and the second magnet are separated by a distance corresponding to the center of the bobbin.
11. The method of claim 10,
And a center of the bobbin is located at an imaginary line connecting the first magnet and the second magnet.
11. The method of claim 10,
Wherein the first magnet and the second magnet have a shape and a size corresponding to each other.
11. The method of claim 10,
Wherein the first magnet and the second magnet are positioned so as to form magnetic force balance or weight balance between each other.
A first movable part including a first driving part and a bobbin on which the first driving part is located;
A second driving unit for moving the first driving unit through an electromagnetic interaction with the first driving unit, and a second mover including a housing in which the second driving unit is located;
And a third driving unit for moving the second driving unit through electromagnetic interaction with the second driving unit,
The second driving unit includes a first driving magnet, a second driving magnet disposed adjacent to the first driving magnet, a third driving magnet disposed adjacent to the second driving magnet, And a fourth drive magnet disposed adjacent to the fourth drive magnet,
Wherein the size of the first drive magnet is different from the size of the second drive magnet.
16. The method of claim 15,
Wherein a first separation distance between the first drive magnet and the second drive magnet is different from a second separation distance between the second drive magnet and the third drive magnet.
17. The method of claim 16,
A first magnet located on one side of the bobbin; And
And a sensor unit disposed in the housing and sensing a position of the first magnet,
Wherein the first magnet is positioned to face a first spacing space defining the first spacing distance,
Wherein the first separation distance is longer than the second separation distance.
16. The method of claim 15,
Wherein the first driving unit includes a coil,
And a controller for applying power to the coil to move the first mover with respect to the second mover,
Wherein the controller receives a position of the first magnet detected by the sensor unit and controls a power applied to the coil.
A display unit disposed on one side of the main body to display information; and a camera module mounted on the main body and configured to photograph an image or a photograph,
The camera module includes:
A first movable part including a first driving part and a bobbin on which the first driving part is located;
A second driving unit for moving the first driving unit through an electromagnetic interaction with the first driving unit, and a second mover including a housing in which the second driving unit is located;
And a third driving unit for moving the second driving unit through electromagnetic interaction with the second driving unit,
Wherein the size of the first drive magnet is different from the size of the second drive magnet.

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