WO2016003103A1 - 렌즈 구동 장치 - Google Patents

렌즈 구동 장치 Download PDF

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Publication number
WO2016003103A1
WO2016003103A1 PCT/KR2015/006343 KR2015006343W WO2016003103A1 WO 2016003103 A1 WO2016003103 A1 WO 2016003103A1 KR 2015006343 W KR2015006343 W KR 2015006343W WO 2016003103 A1 WO2016003103 A1 WO 2016003103A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit board
housing
bobbin
magnet
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2015/006343
Other languages
English (en)
French (fr)
Korean (ko)
Inventor
박상옥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Innotek Co Ltd
Original Assignee
LG Innotek Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020140082957A external-priority patent/KR102330672B1/ko
Priority claimed from KR1020140109728A external-priority patent/KR102220503B1/ko
Application filed by LG Innotek Co Ltd filed Critical LG Innotek Co Ltd
Priority to CN201911392732.9A priority Critical patent/CN111399247B/zh
Priority to CN201580041240.9A priority patent/CN106575025B/zh
Priority to CN201911392720.6A priority patent/CN111399246B/zh
Priority to JP2016575732A priority patent/JP6669677B2/ja
Priority to US15/321,940 priority patent/US10042140B2/en
Publication of WO2016003103A1 publication Critical patent/WO2016003103A1/ko
Anticipated expiration legal-status Critical
Priority to US16/025,327 priority patent/US11131830B2/en
Priority to US17/445,052 priority patent/US11726296B2/en
Priority to US18/344,156 priority patent/US12298589B2/en
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/035—DC motors; Unipolar motors
    • H02K41/0352—Unipolar motors
    • H02K41/0354—Lorentz force motors, e.g. voice coil motors
    • H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0264—Details of the structure or mounting of specific components for a camera module assembly
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • the embodiment relates to a lens driving apparatus.
  • the camera module may include a lens, an image sensor module, and a voice coil motor (VCM) for adjusting a distance between the lens and the image sensor module.
  • VCM voice coil motor
  • the camera module may be minutely shaken according to the shaking of the user, and thus, the desired image or video may not be captured by the camera shake.
  • Voice coil motors having an optical image stabilizer (OIS) function have been developed to correct distortion of an image or a video caused by the shaking of a user.
  • OIS optical image stabilizer
  • the embodiment provides a lens driving apparatus capable of miniaturization, image correction in a free direction, and accurately determining and controlling the position of a lens.
  • Lens driving apparatus includes a housing for supporting the first coil; A bobbin supporting a magnet and moving in a first direction parallel to an optical axis within the housing by electromagnetic interaction between the magnet and the first coil; An elastic member coupled to the bobbin and the housing; A first circuit board electrically connected to the elastic member; A second circuit board disposed below the housing; A second coil disposed on the second circuit board; And a support member electrically connecting the first circuit board and the second circuit board or electrically connecting the elastic member and the second circuit board.
  • the elastic member is an upper elastic member for coupling with the upper portion of the bobbin and the housing; And a lower elastic member coupled to a lower portion of the bobbin and a lower portion of the housing.
  • the first circuit board may include a first upper surface portion disposed on the upper elastic member; A first terminal surface bent from the first upper surface portion and having a plurality of first terminals; And a first pad disposed on the first upper surface portion and to which one end of the support member is electrically connected.
  • the second circuit board may include a second upper surface portion on which the second coil is disposed; And a second pad disposed on the second upper surface portion and to which the other end of the support member is electrically connected.
  • the housing may include an upper end at which the first circuit board is disposed; A plurality of support parts connected to a lower surface of the upper end and supporting the first coil; And it may include a through groove formed in the corner of the upper end, the support member may pass through the through groove.
  • the housing may include an upper end at which the first circuit board is disposed; A plurality of support parts connected to a lower surface of the upper end and supporting the first coil; And a through groove formed at an edge of the upper end portion, wherein the support member may pass through the through groove.
  • a first upper surface portion of the first circuit board includes at least one first corner region
  • a second upper surface portion of the second circuit board includes at least one second corner region corresponding to the first corner region
  • At least one of the plurality of support members is disposed between the first corner region and the corresponding second corner region, wherein the first corner region is preset from an edge of the first upper surface of the first circuit board.
  • the second edge area may be an area within a distance
  • the second corner area may be an area within a predetermined distance from a second upper surface of the second circuit board.
  • the bobbin may be raised or lowered in a first direction parallel to the optical axis at an initial position by electromagnetic interaction between the magnet and the first coil.
  • a lower portion of the bobbin may be spaced apart from the second circuit board at the initial position.
  • a lens driving apparatus in another embodiment, includes a housing that supports a first magnet; A bobbin installed on an outer circumferential surface thereof and moving in a first direction in the housing by electromagnetic interaction between the first magnet and the first coil; Upper and lower elastic members coupled to the bobbin and the housing; A first circuit board electrically connected to the upper elastic member; A second circuit board disposed below the housing; A second coil disposed on the second circuit board; An elastic support member electrically connecting the first circuit board and the second circuit board or electrically connecting the elastic member and the second circuit board; And a first damper disposed on a portion of the elastic support member.
  • the lens driving apparatus may further include a second damper provided at a portion at which the elastic support member and the second circuit board are electrically connected.
  • the housing may include an upper end at which the first circuit board is disposed; A plurality of support parts connected to a lower surface of the upper end and supporting the first coil; And a through groove formed at an edge of the upper end and through which the support member passes, wherein the lens driving device further includes a third damper provided between the through groove of the housing and the elastic support member.
  • a third damper provided between the through groove of the housing and the elastic support member.
  • Each of the upper elastic member and the lower elastic member may include an inner frame connected to the bobbin; An outer frame connected to the housing; And a connection part connecting the inner frame and the outer frame, wherein the lens driving device may further include a fourth damper provided between the inner frame and the housing.
  • a lens driving apparatus in another embodiment, includes: a housing supporting a first magnet; A bobbin on which at least one lens is mounted, a first coil is installed on an outer circumferential surface, and moves in a first direction in the housing by electromagnetic interaction between the first magnet and the first coil; A second magnet disposed on an outer circumferential surface of the bobbin; A first position sensor for sensing a position of the bobbin; Upper and lower elastic members coupled to the bobbin and the housing; A first circuit board electrically connected to the upper elastic member; A second circuit board disposed below the housing; A second coil disposed on the second circuit board; And an elastic support member electrically connecting the first circuit board and the second circuit board or electrically connecting the elastic member and the second circuit board, wherein the second magnet is connected to the first position sensor. It is a bipolar magnetized magnet placed opposite.
  • the second magnet has a first side facing the first position sensor and having a first polarity; And a second side surface facing the first position sensor and spaced apart from or in contact with the first side surface in a direction parallel to the optical axis direction, and having a second polarity opposite to the first side surface.
  • the length in the optical axis direction of the side surface may be equal to or greater than the length in the optical axis direction of the second side surface.
  • the second magnet may include first and second sensing magnets spaced apart from each other; And a non-magnetic partition wall disposed between the first and second sensing magnets.
  • the nonmagnetic partitions may comprise voids or nonmagnetic materials.
  • the first and second sensing magnets may be spaced apart from each other in a direction parallel to the optical axis direction, or may be spaced apart from each other in a direction perpendicular to the optical axis.
  • the length of the nonmagnetic partition may be 10% or more or 50% or less of the length of the second magnet in a direction parallel to the optical axis direction.
  • the first side is positioned above the second side, and in an initial state before moving the lens in the optical axis direction, a height of the center of the first position sensor extends in the magnetizing direction from an upper end of the first side. It may be equal to the height of the horizontal plane of or higher than the height of the imaginary horizontal plane.
  • FIG. 1 is a schematic perspective view of a lens driving apparatus according to an embodiment.
  • FIG. 2 is an exploded perspective view of the lens driving apparatus shown in FIG. 1.
  • FIG. 3 is a perspective view illustrating a cover member removed from the lens driving apparatus of FIG. 1.
  • FIG. 4 shows the top view of FIG. 3.
  • FIG. 5 shows a first perspective view of the bobbin shown in FIG. 2.
  • FIG. 6 shows a second perspective view of the bobbin shown in FIG. 2.
  • FIG. 7 is a first perspective view of the housing shown in FIG. 2.
  • FIG. 7 is a first perspective view of the housing shown in FIG. 2.
  • FIG. 8 shows a second perspective view of the housing shown in FIG. 2.
  • FIG. 9 is a perspective view of an upper elastic member and a lower elastic member of FIG. 2.
  • FIG. 10 is a perspective view illustrating a coupling between the bobbin of FIG. 2 and the upper elastic member.
  • FIG. 11 is a perspective view illustrating a coupling between the bobbin of FIG. 2 and the lower elastic member.
  • FIG. 12 is a perspective view of the bobbin, housing, and upper elastic member of FIG.
  • FIG. 13 illustrates a perspective view of the bobbin, the housing, the upper elastic member, and the first circuit board of FIG. 2.
  • FIG. 14 is an exploded perspective view of the base, the second circuit board, and the second coil shown in FIG. 2.
  • FIG. 15 is a perspective view of the first circuit board shown in FIG. 2.
  • FIG. 16 is a cross-sectional view of the lens driving device shown in FIG. 3.
  • 17 is a cross-sectional view of a CD of the lens driving device shown in FIG. 3.
  • FIG. 18 is a plan view of a lens driving apparatus according to another exemplary embodiment.
  • FIG. 19 is a perspective view of the lens driving apparatus shown in FIG. 18.
  • FIG. 20 is a plan view of a lens driving apparatus according to another exemplary embodiment.
  • FIG. 21 is a perspective view of the lens driving apparatus shown in FIG. 20.
  • FIG. 22 is an exploded perspective view of a lens driving apparatus according to another embodiment.
  • FIG. 23 is a perspective view of the lens driving device of FIG. 22 with the cover member removed.
  • FIG. 24 is a perspective view illustrating a coupling of the upper elastic member, the second magnet, and the bobbin of FIG. 22.
  • FIG. 25 is a perspective view of the upper elastic member coupled to the housing in which the bobbin and the first magnet of FIG. 22 are mounted.
  • 26 is a perspective view of a lens driving apparatus according to another exemplary embodiment.
  • FIG. 27 is a perspective view of a lens driving apparatus according to still another embodiment.
  • FIG. 28 is a conceptual diagram illustrating auto focusing and image stabilization of a lens driving apparatus according to an exemplary embodiment.
  • 29 is a view illustrating a moving direction of the movable part under control of the second coils according to the first embodiment.
  • FIG. 30 is a view illustrating a moving direction of the movable part under control of the second coils according to the second embodiment.
  • 31 illustrates the position of the movable part according to the strength of the current applied to the first coil.
  • 32A to 32D illustrate a driving algorithm according to an embodiment for an auto focusing operation.
  • 33A is a block diagram illustrating a focus control unit according to an exemplary embodiment.
  • 33B is a flowchart according to an exemplary embodiment of the auto focus control method performed by the focus controller illustrated in FIG. 33A.
  • 34A and 34B are graphs for explaining the auto focus function according to the comparative example.
  • 35A and 35B are graphs for describing an auto focus function according to an embodiment.
  • 36A and 36B are graphs for describing fine adjustment in the auto focus function according to an embodiment.
  • FIG. 37 is a flowchart of another example of an auto focus control method performed by the focus controller illustrated in FIG. 33A.
  • FIG. 38 is a schematic cross-sectional view of a lens driving apparatus according to another embodiment.
  • 39A and 39B illustrate cross-sectional views according to example embodiments of the positive electrode magnetizing magnet shown in FIG. 38.
  • FIG. 40 is a graph for explaining an operation of the lens driving apparatus shown in FIG. 38.
  • FIG. 41 shows a state in which the lens driving device illustrated in FIG. 38 is moved in the optical axis direction.
  • FIG. 43 is a sectional view of a lens driving apparatus according to still another embodiment.
  • 45A and 45B are cross-sectional views according to embodiments of the positive electrode magnetizing magnet shown in FIG. 44, respectively.
  • 46 is a sectional view of a lens driving apparatus according to still another embodiment.
  • FIG. 48 is a sectional view of a lens driving apparatus according to still another embodiment.
  • FIG. 49 is a graph illustrating a displacement of the movable part according to the current supplied to the first coil in the lens driving apparatus illustrated in FIGS. 47 and 48.
  • FIG. 50 is a graph illustrating the intensity of the magnetic field detected by the first position sensor according to the distance between the first position sensor and the positive electrode magnetizing magnet according to the moving distance in the optical axis direction of the movable part.
  • 51A and 51B are graphs showing displacements of intensity of magnetic field detected by the first position sensor
  • FIG 52 is a graph for explaining a change in intensity of the magnetic field according to the moving distance of the movable part of the lens driving device of the comparative example.
  • FIG. 53 is a graph illustrating a change in a magnetic field detected by a position sensor according to a movement of a movable part in the lens driving apparatus according to the embodiment.
  • each layer (region), region, pattern, or structure is “on” or “under” the substrate, each layer (film), region, pad, or pattern.
  • “up” and “under” include both “directly” or “indirectly” formed through another layer. do.
  • the criteria for up / down or down / down each layer will be described with reference to the drawings.
  • the image stabilization device applied to a small camera module of a mobile device such as a smartphone or a tablet PC is used to prevent the outline of the captured image from being clearly formed due to the vibration caused by the shake of the user when shooting still images.
  • the auto focusing device is an apparatus that automatically focuses an image of a subject on an image sensor surface.
  • the image stabilization device and the auto focusing device can be configured in various ways.
  • the optical module composed of a plurality of lenses is moved in a direction parallel to the optical axis, or moved about a plane perpendicular to the optical axis. The same auto focusing operation and image stabilization operation can be performed.
  • FIG. 1 is a schematic perspective view of a lens driving apparatus 100 according to an embodiment
  • FIG. 2 is an exploded perspective view of the lens driving apparatus 100 shown in FIG. 1
  • FIG. 3 is a lens driving apparatus of FIG.
  • FIG. 4 is a plan view of FIG. 3
  • FIG. 16 is an AB sectional view of the lens driving apparatus shown in FIG. 3
  • FIG. 17 is a lens shown in FIG. 3.
  • the CD sectional drawing of a drive apparatus is shown.
  • a rectangular coordinate system (x, y, z) may be used.
  • the xy plane formed by the x axis and the y axis means a plane perpendicular to the optical axis.
  • the optical axis direction (z axis direction) is the first direction
  • the x axis direction is the second direction
  • the y axis direction is the third direction. It can be defined as.
  • the lens driving apparatus 100 includes a cover member 300, an upper elastic member 150, a bobbin 110, a first coil 120, and a housing ( 140, the magnet 130, the lower elastic member 160, the elastic support members 220a to 220d, the first position sensor 180, the second coil 230, the second circuit board 250, and the base 210. ) And second and third position sensors 240a and 240b.
  • the bobbin 110, the first coil 120, the magnet 130, the housing 140, the upper elastic member 150, the lower elastic member 160, and the elastic support members 220a to 220d drive the first lens.
  • the unit 100 may be formed and may further include a first position sensor 180.
  • the first lens driving unit 100 may be for auto focus.
  • first lens driving unit 100, the second coil 230, the second circuit board 250, and the base 210 may form the second lens driving unit 200, and the first and second lenses may also be used.
  • the position sensors 240a and 240b may further be included.
  • the second lens driving unit 200 may be for camera shake correction.
  • the cover member 300 includes an upper elastic member 150, a bobbin 110, a first coil 120, a housing 140, a magnet 130, and a lower elastic member in an accommodation space formed together with the base 210. 160, the elastic support members 220a to 220d, the second coil 230, and the second circuit board 250 are accommodated.
  • the cover member 300 may have a box shape as a whole, and a lower portion of the cover member 330 may be coupled to an upper portion of the base 210.
  • the cover member 300 may include an opening 310 that exposes a lens (not shown) coupled to the bobbin 110 to external light, on an upper surface thereof.
  • the opening 310 of the cover member 300 may be provided with a window made of a light transmissive material.
  • the bobbin 110 is disposed inside the housing 140, which will be described later, and is movable in a direction parallel to the optical axis, for example, in a first direction.
  • the bobbin 110 may include a lens barrel (not shown) having at least one lens installed therein, but the lens barrel may be a configuration of a camera module to be described later, and the lens driving apparatus ( It may not be an essential component of 100).
  • the lens barrel may be coupled to the inside of the bobbin 110 in various ways.
  • FIG. 5 shows a first perspective view of the bobbin 110 shown in FIG. 2
  • FIG. 6 shows a second perspective view of the bobbin 110 shown in FIG. 2.
  • the bobbin 110 may have a structure having a hollow 101 for mounting a lens or a lens barrel (not shown).
  • the shape of the hollow 101 may be determined by the shape of the lens or lens barrel.
  • the hollow 101 can be circular, elliptical, or polygonal.
  • the lens barrel may be coupled to the bobbin 110 by a combination of the female thread 119 formed on the inner circumferential surface of the bobbin 110 and the male thread formed on the outer circumferential surface of the lens barrel.
  • the present invention is not limited thereto, and the lens barrel may be directly fixed to the inside of the bobbin 110 by a method other than screwing.
  • one or more lenses may be integrally formed with the bobbin 110 without the lens barrel.
  • the bobbin 110 may include at least one upper support protrusion 113 formed on the upper surface, and at least one lower support protrusion 114 formed on the lower surface (see FIG. 7).
  • the upper support protrusion 113 of the bobbin 110 may be coupled to the inner frame 151 of the upper elastic member 150, and thus the bobbin 110 may be coupled to and fixed to the upper elastic member 150. .
  • the upper support protrusion 113 of the bobbin 110 may include a central protrusion 113a, a first upper protrusion 113b, and a second upper protrusion 113c.
  • the first upper protrusion 113b is disposed spaced apart from the central protrusion 113a by a first distance on one side of the central protrusion 113a, and the second upper protrusion 113c is centered on the other side of the central protrusion 113a.
  • the protrusion 113a may be spaced apart from the protrusion 113a by a second distance.
  • first distance and the second distance may be the same, and the first upper protrusion 113b and the second upper protrusion 113c may be arranged symmetrically with respect to the center protrusion 113a, but are not limited thereto.
  • the upper elastic member 150 may be left-right asymmetrical according to the shape of the inner frame 151.
  • Each of the central protrusion 113a, the first upper protrusion 113b, and the second upper protrusion 113c may have a prismatic shape, but the present invention is not limited thereto and may be cylindrical in other embodiments.
  • the inner frame 151 of the upper elastic member 150 to be described later may be fitted between the central protrusion 113a and the first upper protrusion 113b, and between the central protrusion 113a and the second upper protrusion 113c. Because of this, the inner frame 151 may be coupled to the upper portion of the bobbin.
  • the upper support protrusion 113 and the inner frame 151 of the bobbin 110 may be fixed to each other by an adhesive member such as heat fusion or epoxy.
  • the first upper protrusion 113b and the second upper protrusion 113c may serve as stoppers for preventing the bobbin 110 from rotating. have.
  • the number of upper support protrusions 113 of the bobbin 110 may be a plurality, and may be disposed on the upper surface of the bobbin 110 to be spaced apart from each other.
  • the plurality of upper support protrusions 113 of the bobbin 110 may be spaced apart from each other to avoid interference with peripheral components.
  • the upper support protrusions 113 may be disposed at regular intervals symmetrically with respect to the imaginary line passing through the center of the bobbin 110.
  • the upper support protrusions 113 may be disposed to be symmetrical with respect to an imaginary line passing through the center of the bobbin 110.
  • the lower support protrusion 114 of the bobbin 110 may be cylindrical or prismatic, and may be one or more.
  • the lower support protrusion 114 of the bobbin 110 may be coupled to the inner frame 161 of the lower elastic member 160, whereby the bobbin 110 may be coupled to and fixed to the lower elastic member 150. .
  • the lower support protrusions 114 of the bobbin 110 are symmetrically spaced or not symmetrically with respect to an imaginary line passing through the center of the bobbin 110. Can be arranged at intervals.
  • a magnet seating groove 116 having a size corresponding to that of the magnet 130 may be provided between the upper side and the lower side of the outer circumferential surface of the bobbin 110.
  • the position of the magnet seating groove 116 may be provided on the outer circumferential surface of the bobbin 110 according to the arrangement position of the magnet 130, and the number of the magnet seating grooves 116 may be provided on the outer circumferential surface of the bobbin 110 by the number of magnets. Can be prepared.
  • magnet seating grooves 116 spaced apart from each other may be provided on an outer circumferential surface of the bobbin 110, and magnet seating grooves facing each other may be two pairs.
  • any pair of magnet seating grooves 116 facing each other and the other pair of magnet seating grooves may be perpendicular to each other.
  • the magnet seating groove 116 may be in the form of a groove consisting of a bottom and a side wall, and may have a structure in which a part of the side wall is open.
  • the magnet seating groove 116 may be in the form of a groove in which the upper sidewall is opened to insert the magnet 130, but is not limited thereto.
  • the magnet seating portion of the housing 140 may have a portion of the sidewall. It may have a concave groove structure that is not open.
  • the upper evacuation groove 112 may be provided on the outer circumferential surface 110a to correspond to the connection portion 153 of the elastic member 150.
  • the upper escape groove 112 may be formed on the outer circumferential surface 110a of the bobbin 110 positioned between two neighboring magnet seating grooves.
  • the bobbin 110 may include four upper escape grooves 112 formed on the outer circumferential surface 110a to be spaced apart from each other.
  • a lower escape groove 118 may be provided below the outer circumferential surface corresponding to the connection portion 163 of the lower elastic member 160.
  • the lower escape groove 118 may be formed at a lower portion of the outer circumferential surface 110a of the bobbin 110 positioned between two neighboring magnet seating grooves.
  • the bobbin 110 may include four lower escape grooves 118 formed below the outer circumferential surface 110a to be spaced apart from each other.
  • the outer circumferential surface 110a of the bobbin 110 positioned between two neighboring magnet seating grooves may be a convex curved surface in the direction of the outer circumferential surface of the bobbin 110 from the center of the hollow 101 of the bobbin 110.
  • the magnet 130 is disposed on the outer circumferential surface 110a of the bobbin 110 to correspond to the first coil 120 to be described later.
  • the magnet 130 may be disposed in the magnet seating groove 116 of the bobbin 110.
  • the magnet 130 may be fixed to the magnet seating groove 116 of the bobbin 110 by using an adhesive member such as an adhesive or a double-sided tape.
  • the number of magnets 130 may be one or more. For example, as shown in FIG. 2, four magnets may be disposed on the outer circumferential surface of the bobbin 110 spaced apart from each other.
  • the magnet 130 may have a rectangular parallelepiped shape, but is not limited thereto. In another embodiment, the magnet 130 may have a trapezoidal shape.
  • the magnet 130 may be disposed in the magnet seating groove 116 such that a wide surface thereof faces the outer circumferential surface of the bobbin 110, and the magnets 130 facing each other may be disposed in parallel.
  • the magnet 130 may be disposed to face the first coil 120 to be described later.
  • Surfaces facing each other of the magnet 130 and the first coil 120 may be disposed to be parallel to each other.
  • the present invention is not limited thereto, and only one of the surfaces of the magnet 130 and the first coil 120 facing each other may be flat, and the other may be formed of a curved surface.
  • both facing surfaces of the first coil 120 and the magnet 130 may be curved surfaces. In this case, the curvatures of the facing surfaces of the first coil 120 and the magnet 130 may be the same.
  • the magnet 130 and the first coil 120 may be configured to correspond to each other.
  • the first coil 120 When the magnet 130 is configured as a single body and the entire surface facing the first coil 120 has the same polarity, the first coil 120 also has the same polarity as the surface corresponding to the magnet 130. It can be configured to.
  • the magnet 130 may be disposed such that a surface facing the first coil 120 is an N pole and an opposite surface of the N pole is an S pole.
  • the present invention is not limited thereto, and the polarity of the magnet 130 may be reversed.
  • the first coil 120 is also divided into a magnet ( It may also be divided into a number corresponding to 130.
  • the housing 140 supports the first coil 120 and accommodates the bobbin 110 therein to move in the first direction parallel to the optical axis.
  • FIG. 7 is a first perspective view of the housing 140 shown in FIG. 2, and FIG. 8 is a second perspective view of the housing 140 shown in FIG. 2.
  • the housing 140 may have a hollow pillar shape as a whole.
  • the housing 140 may have a polygonal (eg, rectangular, or octagonal) hollow 201.
  • the housing 140 may include a top portion 710 having a hollow 201 and a plurality of supports 720-1 to 720-4 connected to the bottom surface of the top portion 710.
  • the supports 720-1 to 720-4 are spaced apart from each other, and an opening 701 exposing the magnet 130 mounted on the outer circumferential surface of the bobbin 110 may be formed between two neighboring supports.
  • the upper end 710 of the housing 140 may have a rectangular shape, and the plurality of support parts 720-1 to 720-4 may be spaced apart from each other.
  • the supports 720-1 to 720-4 of the housing 140 may be in the shape of a column, but are not limited thereto.
  • the housing 140 may have four supports 720-1 to 720-4, and at least one pair of the supports may be disposed to face each other.
  • the supports 720-1 to 720-4 of the housing 140 may be disposed to correspond to the escape grooves 112 and 118 of the bobbin 110.
  • the supports 720-1 to 720-4 of the housing 140 may be disposed to correspond to the outer circumferential surface 110a of the bobbin 110 positioned between two neighboring magnet seating grooves.
  • the supports 720-1 to 720-4 of the housing 140 may be arranged to correspond to or align with each of the four corners of the upper end 710.
  • the outer circumferential surface 730 of each of the support portions 720-1 to 720-4 of the housing 140 has a first side surface 730-1 parallel to the second direction and a second side surface 730-parallel to the third direction. 2) and a third side surface 730-3 disposed between the first side surface and the second side surface.
  • Each of the first to third side surfaces 720-1 to 720-3 may be a plane.
  • the second angle formed by the second side surface 720-2 may be an obtuse angle, and the first angle and the second angle may be the same.
  • the area of the third side surface 730-3 of each of the support portions 720-1 to 720-4 of the housing 140 is smaller than that of each of the first and second side surfaces 730-1, 730-2. It may be, but is not limited thereto.
  • each of the supports 720-1-720-4 of the housing 140 is formed from the centers of the hollow 201 of the housing 140 from the supports 720-1-720-4 of the housing 140. It may be a curved surface convex in the direction of the outer peripheral surface (730).
  • Inner circumferential surface 740 of each of the support portions 720-1 to 720-4 of the housing 140 so that the bobbin 110 can easily move in the first direction within the housing 140 without interference of the housing 140. ) May have a curved surface corresponding to or coincident with the curved surface of the outer circumferential surface of the bobbin.
  • the support parts 720-1 to 720-4 of the housing 140 protrude from the lower portions of the first and second side surfaces 720-1 and 720-2. 731 and 732 can be provided.
  • the housing 140 may include at least one first stopper 143 protruding from the upper surface to prevent collision with the cover member 300. That is, the first stopper 143 of the housing 140 may prevent the upper end 710 of the housing 140 from directly colliding with the inner surface of the cover member 300 when an external impact occurs.
  • the first stopper 143 may protrude from an upper surface of the upper end portion 710 of the housing 140, and may be disposed corresponding to or aligned with the supporting portions 720-1 to 720-4 of the housing 140. have.
  • the number of first stoppers 143 may be plural, and the plurality of first stoppers may be spaced apart from each other.
  • the at least one pair of first stoppers may be arranged to face each other.
  • the first stopper 143 may have a cylindrical or polygonal column shape and may be divided into two or more.
  • the first stoppers 143 may be divided into two, and the divided first stoppers 143a and 143b may be spaced apart by a predetermined distance.
  • the first stopper 143 of the housing 140 may serve to guide the installation position of the upper elastic member 150.
  • the housing 140 may include at least one second stopper 146 protruding from the side surface of the upper end 710 to prevent a collision with the cover member 300. That is, the second stopper 146 of the housing 140 may prevent the side surface of the upper end portion 710 of the housing 140 from directly colliding with the inner surface of the cover member 300 when an external impact occurs.
  • the housing 140 may further include at least one upper frame support protrusion 144 protruding to an upper surface of the upper end 710 to be coupled to the outer frame 152 of the upper elastic member 150.
  • the number of upper frame support protrusions 144 of the housing 140 may be plural, and the plurality of upper frame support protrusions 144 of the housing 140 may be disposed on the upper surface of the upper end 710 of the housing 140. Can be spaced apart.
  • the upper support protrusion 144 may be spaced apart from the first stopper 143 and disposed adjacent to an edge of the housing 140.
  • the housing 140 has at least one lower frame support protrusion 145 protruding from the lower surface of each of the support portions 720-1 to 720-4 for engagement with the outer frame 162 of the lower elastic member 160. It may be provided.
  • the lower frame support protrusion 145 may have a cylindrical or polygonal pillar shape, and may be aligned at the center of the lower surface of each of the support portions 720-1 to 720-4, but is not limited thereto. In another embodiment, the number of lower frame support protrusions 145 of the housing 140 may be plural.
  • the upper end 710 of the housing 140 may be provided with a buffer support 741 in contact with the hollow 201 and having a step d1 with an upper surface.
  • a damper described later may be disposed or applied to the buffer support part 741.
  • the upper surface 740 of the upper end 710 of the housing 140 may include a buffer support 741, and an outer support 742, between the buffer support 741 and the outer support 742. There may be a step d1 in one direction.
  • the outer support part 742 may be in contact with a side surface of the housing 140, and may have a shape corresponding to or coincident with the outer frame 152 of the upper elastic member 150, and may form an outer frame 152 of the upper elastic member 150. I can support it.
  • the buffer support 741 may be in the form of a groove recessed downward from the outer support 742, and may have a step d1 with the outer support 742.
  • the buffer supporter 741 may be formed to correspond to the first portions S1 positioned corresponding to each of the supporters 720-1 to 720-4 of the housing 140, and the bent portion 151a of the upper elastic member. It may include a second portion (S2) located between the first portion (S1).
  • the first portion S1 of the buffer supporter 741 may be aligned in a vertical direction with the connecting portion 153 of the upper elastic member 150 and the upper escape groove 112 of the bobbin 110.
  • a damper may be applied between the buffer support part 741 and the connection part 153 of the upper elastic member 150 to prevent the oscillation phenomenon when the bobbin 110 moves.
  • the second portion S2 of the buffer supporter 741 may include an escape groove 750 for excluding spatial interference with the bent portion 151a of the inner frame 151 of the upper elastic member 150.
  • the length of the escape groove 750 may be equal to or longer than the length of the bent portion 151a.
  • the housing 140 may include a through groove 751 through which the elastic support members 220a to 220d pass through the edge of the side surface of the upper end portion 710.
  • the through groove 751 may penetrate the upper end of the housing 140, may be recessed from the side of the upper end 710 of the housing 140, and may be opened in the lateral direction, but is not limited thereto.
  • the hole structure may penetrate only the upper and lower surfaces of the upper end 710 of the housing 140.
  • the through groove 751 may have a depth such that portions of the elastic support members 220a to 220d inserted into the through groove 751 are not exposed outside the side surface of the housing 140.
  • the through groove 751 may serve to guide or support the elastic support members 220a to 220d.
  • the housing 140 may include a first position sensor groove 141b at a side surface of the upper end portion 710.
  • the first position sensor groove 141b may have a size and a shape corresponding to the first position sensor 180.
  • the first position sensor groove 141b may be formed at a side surface of the upper end portion 710 positioned between the support portions 720-1 to 720-4 of the housing 140.
  • the first position sensor 190 is disposed in the housing 140.
  • the first position sensor 190 may be disposed in the first position sensor groove 141b of the housing 140.
  • the first position sensor 190 is electrically connected to the first circuit board 170 by soldering or soldering.
  • the first position sensor 190 may be electrically connected to the first terminal surface 170a of the first circuit board 170.
  • the first position sensor 190 may be a sensor for detecting a change in the magnetic field emitted from the magnet 130, and may detect a change in the magnetic field of the magnet 130 as the bobbin 110 moves in the first direction. have.
  • the first position sensor 190 may be disposed to correspond to the magnet 130.
  • the first position sensor 190 may include a Hall sensor and a driver that receives data from the Hall sensor and performs data communication using an external controller and a protocol, for example, I2C communication. Can be.
  • the first position sensor 190 may be implemented as a hall sensor alone.
  • the first coil 120 is disposed on the outer circumferential surface of the housing 140.
  • the first coil 120 may be disposed on the outer circumferential surface 730 of the supporting portions 720-1 to 720-4 of the housing 140.
  • the first coil 120 is a ring disposed on the first to third side surfaces 730-1 to 730-3 of the supports 720-1 to 720-4 of the housing 140.
  • the coil block may have a shape, but is not limited thereto.
  • the ring shape of the first coil 120 may be a polygon corresponding to the shape of the outer circumferential surface 730 of the supporting parts 720-1 to 720-4 of the housing 140, for example, an octagonal shape.
  • the ring shape of the first coil 120 may be at least four sides straight, and the corner portion connecting the four sides may be round or straight.
  • the first coil 120 may directly face the magnet 130 through the opening 701 of the housing 140. That is, at least a portion of the housing 140 may not be disposed between the magnet 130 and the first coil 120, and the first coil 120 and the magnet 130 may face each other through the opening 701. have.
  • FIG. 9 is a perspective view of the upper elastic member 150 and the lower elastic member of FIG. 2
  • FIG. 10 is a perspective view of the bobbin 110 and the upper elastic member 150 of FIG. 2
  • FIG. 12 illustrates a perspective view of the bobbin 110 and the lower elastic member 160
  • FIG. 12 illustrates a perspective view of the bobbin 110, the housing 140, and the upper elastic member 150 of FIG. 2.
  • each of the upper elastic member 150 and the lower elastic member 160 may be coupled to the bobbin 110 and the housing 140.
  • the upper elastic member 150 may be coupled to one end (eg, upper) of the bobbin 110 and one end (eg, upper) of the housing 140
  • the lower elastic member 160 may be bobbin 110. And the other end of the housing 140, and the other end of the housing 140.
  • the upper elastic member 150 and the lower elastic member 160 may support the bobbin 110 by elasticity to perform the raising and lowering operation in a first direction parallel to the optical axis.
  • the upper elastic member 150 may include an inner frame 151 coupled to the bobbin 110, an outer frame 152 coupled to the housing 140, and a connection portion connecting the inner frame 151 and the outer frame 152 ( 153).
  • the lower elastic member 160 has an inner frame 161 coupled with the bobbin 110 and an outer frame 162 coupled with the housing 140, and a connection portion connecting the inner frame 161 and the outer frame 162 ( 163).
  • the upper elastic member 150 and the lower elastic member 160 may be in the form of a leaf spring.
  • the connecting portions 153 and 163 of the upper and lower elastic members 150 and 160 may be bent at least one or more times to form a pattern.
  • Lifting and / or lowering of the bobbin 110 in the first direction may be supported by the elastic force through the positional change and the micro deformation of the connecting parts 153 and 163.
  • the connecting parts 153 and 163 may connect the inner frames 151 and 161 and the outer frames 152 and 162 such that the inner frames 151 and 161 may be elastically deformed with respect to the outer frames 152 and 162.
  • the inner frame 151 of the upper elastic member 150 may have a hollow corresponding to the hollow 101 of the bobbin 110 and / or the hollow 201 of the housing 140.
  • the outer frame 152 of the upper elastic member 150 may be a polygonal ring shape disposed around the inner frame 151.
  • the inner frame 151 of the upper elastic member 150 may have a bent portion 151a that is coupled to the upper support protrusion 113 of the bobbin 110.
  • the bent portion 151a may have a groove shape that is convex toward the outer circumferential surface of the inner frame 151 at the center of the inner frame 151.
  • the bent portion 151a may include a first portion 911, a second portion 912, and a third portion (between the first portion 911 and the second portion 912). 913).
  • the first and second portions 911 and 912 of the bent portion 151a of the upper elastic member 150 are disposed between the central protrusion 113a and the first upper protrusion 113b of the bobbin 110, and the central protrusion 113a. And a second upper protrusion 113c.
  • the inner circumferential surface of the third portion 913 of the bent portion 151a of the upper elastic member 150 may contact the outer circumferential surface of the central protrusion 113a of the bobbin 110.
  • the upper support protrusion 113 of the bobbin 110 and the bent portion 151a of the upper elastic member 150 may be fixed by heat fusion or by an adhesive member such as epoxy.
  • the outer frame 152 of the upper elastic member 150 may be provided with a through hole 152a for coupling with the upper frame support protrusion 144 of the housing 140.
  • the upper frame support protrusion 144 of the housing 140 and the first through hole 152a of the upper elastic member 150 may be fixed by heat fusion or by an adhesive member such as epoxy.
  • the outer frame 152 of the upper elastic member 150 may be provided with a first guide groove 153 that engages with the first stopper 143 of the housing 140.
  • the guide groove 153 of the upper elastic member 150 may be formed at a position corresponding to the first stopper 143 of the housing 140, for example, adjacent to an edge of the outer frame 152.
  • first guide grooves 153a and 153b corresponding to each of the divided first stoppers 143a and 143b may be formed in the outer frame 152 of the upper elastic member 150. 153a and 153b may be spaced apart from each other.
  • the inner frame 161 of the lower elastic member 160 may have a hollow corresponding to the hollow 101 of the bobbin 110 and / or the hollow 201 of the housing 140.
  • the outer frame 162 of the lower elastic member 160 may be a polygonal ring shape disposed around the inner frame 161.
  • the lower elastic member 160 may be divided into two in order to receive power having different polarities.
  • the lower elastic member 160 may include a first lower elastic member 150a and a second lower elastic member 150b that are electrically separated from each other.
  • Each of the inner frame 161 and the outer frame 162 of the lower elastic member 160 may be divided into two to be electrically separated.
  • each of the first and second lower elastic members 160a and 160b may include one of two divided inner frames, one of two divided outer frames, and a connecting portion connecting both. Can be.
  • the inner frame 161 of the lower elastic member 160 may be provided with a through hole 161a for coupling with the lower support protrusion 114 of the bobbin 110.
  • the lower support protrusion 114 of the bobbin 110 and the through hole 161a of the lower elastic member 150 may be fixed by heat fusion or by an adhesive member such as epoxy.
  • the outer frame 162 of the lower elastic member 160 may include an insertion groove 162a that engages with the lower frame support protrusions 145 of the support portions 720-1 to 720-4 of the housing 140. .
  • the lower frame support protrusion 145 of the housing 140 and the insertion groove 162a of the lower elastic member 160 may be fixed by heat fusion or by an adhesive member such as epoxy.
  • the lower elastic member 160 may be electrically connected to the first coil 120.
  • the eye of the first coil 120 may be electrically connected to the first lower elastic member 160a, and the vertical line of the first coil 120 may be electrically connected to the second lower elastic member 160b.
  • one end of the inner frame of the first lower elastic member 160a may be provided with a first bonding part 169a through which a line of sight of the first coil 120 is electrically connected by soldering or soldering.
  • one end of the inner frame of the second lower elastic member 160b may include a second bonding part 169b to which the vertical line of the first coil 120 is electrically connected.
  • the lower elastic member 160 is electrically connected to the first circuit board 170.
  • the outer frame 162 of each of the first and second lower elastic members 160a and 160b may have a pad portion 165a and 165b electrically connected to the first circuit board 170 through soldering or soldering. It can be provided.
  • the pad portions 165a and 165b of the lower elastic member 160 are first terminals 175-1 to 175-n, n> 1 formed on the first terminal surface 170a of the first circuit board 170. Natural number) can be electrically connected to a corresponding terminal.
  • the first coil 120 may be electrically connected to the first circuit board 170 through the first and second lower elastic members 160a and 160b.
  • the bobbin 110 may be fixed to the inner frames 151 and 161 of the upper and lower elastic members 150 and 160.
  • the coupling between the through-hole 152a of the outer frame 152 of the upper elastic member 150 and the upper frame support protrusion 144 of the housing 140, and the insertion of the outer frame 162 of the lower elastic member 160 By coupling between the groove 162a and the lower frame support protrusion 145 of the housing 140, the housing 140 is fixed to the outer frames 152, 162 of the upper and lower elastic members 150, 160. Can be.
  • the upper elastic member 150 and the lower elastic member 160 may be electrically connected to the first circuit board 170 without dividing the lower elastic member 160 into two.
  • the lower elastic member 160 is divided into two, and the upper elastic member 150 is not divided, but is not limited thereto.
  • the lower elastic member 160 is not divided, the upper elastic member 150 is divided in two, and the two divided upper elastic members are electrically connected to the first circuit board 170 to thereby form a first coil ( Power supplies having different polarities may be supplied to the 120.
  • the eye of the first coil 120 is connected to the upper elastic member 150 without the upper and lower elastic members 150 and 160 being divided, and the vertical line of the first coil 120 is lowered.
  • the elastic member 160 and electrically connecting the upper and lower elastic members 150 to the first circuit board powers having different polarities may be supplied to the first coil 120.
  • the upper and lower elastic members 150 and 160 are not divided, the first circuit board 170 is not electrically connected, and the first coil 120 and the second circuit board 250 are electrically connected to each other. Direct connection and electrically connecting the first circuit board 170 and the second circuit board 250 by the elastic support members 220a to 220d to supply power having different polarities to the first coil 120. Can be.
  • the first circuit board 170 is disposed on the upper elastic member 150.
  • FIG. 15 is a perspective view of the first circuit board 170 shown in FIG. 2.
  • the first circuit board 170 may be disposed downward from the first upper surface portion 170b and the first upper surface portion 170b disposed on the outer frame 152 of the upper elastic member 150.
  • the first terminal surface 170a may be bent.
  • the first upper surface portion 170b of the first circuit board 170 may have a shape corresponding to or coincident with the outer frame 152 of the upper elastic member 150, and the outer frame 152 of the upper elastic member 150. It may be in contact with the upper surface of.
  • the first upper surface portion 170b of the first circuit board 170 may have a ring shape having a hollow 710-1, and an outer circumferential surface of the upper surface portion 170b of the first circuit board 170. May be square.
  • the first circuit board 170 may include a through hole 171 coupled to the upper support protrusion 144 of the housing 140 on the first upper surface 170b.
  • the upper support protrusion 144 of the housing 140 and the through hole 171 of the first circuit board 170 may be fixed by an adhesive member such as heat fusion or epoxy.
  • the first circuit board 170 may include a second guide groove 172 coupled to the first stopper 143 of the housing 140.
  • the second guide groove 172 may be in the form of a through groove penetrating the first circuit board 170.
  • the first stopper 143 of the housing 140 may have a first guide groove 153 of the outer frame 152 of the upper elastic member 150 and a second guide groove 172 of the first circuit board 170. Can be combined together.
  • the second guide groove 172 of the first circuit board 170 is positioned at a position corresponding to the first stopper 143 of the housing 140, for example, the first upper surface 170b of the first circuit board 170. It may be formed adjacent to the corner.
  • second guide grooves 172a and 172b corresponding to the divided first stoppers 143a and 143b may be formed on the first upper surface 170b of the first circuit board 170 and the second guide.
  • the grooves 172a and 172b may be spaced apart from each other.
  • the first circuit board 170 may include first pads 174a to 174d on one end of the first upper surface 170b to which one end of the elastic support members 220a to 220d are electrically connected.
  • first pads 174a to 174d of the first circuit board 170 may have grooves or through holes into which the elastic support members 220a to 220d are inserted.
  • Each of the first pads 174a to 174d of the first circuit board 170 may be electrically connected to one end of a corresponding one of the elastic support members 220a to 220d by soldering or soldering.
  • each of the first pads 174a to 174d of the first circuit board 170 may be disposed between the corner of the first upper surface 170b of the first circuit board 170 and the second guide grooves 172a and 172b. Can be arranged.
  • the first terminal surface 170a of the first circuit board 170 may be bent vertically downward from the first upper surface portion 170b, and may include a plurality of first terminals (terminals) to which electrical signals are input from the outside. It may include first pins (natural numbers 175-1 to 175-n, n> 1).
  • the first terminal surface 170a of the first circuit board 170 may include a housing 140 in which the first position sensor groove 141b is provided. It may be bent to the side of the upper end 710 of the. Therefore, the first position sensor 190 disposed in the first position sensor groove 141b may be in close contact with the first terminal surface 170a of the first circuit board 170.
  • the plurality of terminals 175-1 to 175-n, a natural number of n> 1, are terminals for supplying power to the first position sensor 190 by receiving power from an external source and an output of the first position sensor 190. It may include a terminal for outputting, and / or a terminal for testing the first position sensor 190.
  • the number of terminals 175-1 to 175-n, a natural number of n> 1, formed on the first circuit board 170 may increase or decrease according to the type of components to be controlled.
  • the first circuit board 170 includes wirings or wiring patterns that electrically connect the first pads 174a to 174d and the plurality of terminals 175-1 to 175-n, where n> 1. can do.
  • the first position sensor 190 is a plurality of terminals 175-1 to 175-n, where n> 1, which is formed on the first terminal surface 170a of the first circuit board 170 by soldering or soldering.
  • the number of terminals may be electrically connected to at least one of the terminals, and the number of terminals electrically connected to the first position sensor 190 may be determined.
  • the first circuit board 170 and the upper elastic member 150 may be integrally implemented.
  • the first circuit board 170 may be omitted, and the upper elastic member 150 may include a structure in which a thin film having heat resistance, chemical resistance, and bending resistance, and a copper foil pattern for circuit wiring are stacked. .
  • first circuit board 170 and the lower elastic member 160 may be integrally implemented.
  • first circuit board 170 may be omitted, and the lower elastic member 160 may be implemented to include a structure in which a flexible film and a copper foil pattern are stacked.
  • FIG. 14 is an exploded perspective view of the base 210, the second circuit board 250, and the second coil 230 shown in FIG. 2.
  • the base 210 has a hollow corresponding to the hollow 101 of the bobbin 110, and / or the hollow 201 of the housing 140, and coincides with or corresponds to the cover member 300.
  • the shape may be, for example, a rectangular shape.
  • the base 210 may support the supports 720-1 to 720-4 of the housing 140.
  • the base 210 is recessed from the upper surface and has a seating groove 213 for inserting or supporting the lower frame support protrusion 145 of the supports 720-1 to 720-4 of the housing 140. can do.
  • the mounting groove 213 of the base 210 may be formed on the upper surface of the base 210 corresponding to the second side wall 142 of the housing 140.
  • a portion of the side surface of the mounting groove 213 may be exposed to the hollow of the base 210. That is, one of the side surfaces of the mounting groove 213 of the base 210 toward the hollow of the base 210 may be opened.
  • the lower frame support protrusion 145 of the housing 140 may be inserted into the mounting groove 213 of the base 210, and may be fixed to the mounting groove 213 by an adhesive member such as epoxy.
  • the base 210 may include a terminal surface support groove 210a formed in the side surface of the second circuit board 250 to be recessed in a predetermined depth to support the terminal surface 250a of the second circuit board 250.
  • the terminal surface support groove 210a may be formed in at least one of the side surfaces of the base 210, and the second surface of the terminal surface support groove 210a may not protrude out of the outer circumferential surface of the base 210 or to adjust the degree of protruding out of the outer circumferential surface of the base 210. It may serve to seat the terminal surface 250a of the circuit board 250.
  • the base 210 is recessed from the upper surface, the second position sensor seating groove 215a in which the second position sensor 240a is disposed, and the third position sensor seating recess in which the third position sensor 240b is disposed. 215b may be provided.
  • the first virtual line connecting the center of the second position sensor seating groove and the base 210 and the second virtual line connecting the center of the base position 210 and the third position sensor seating grooves 215a and 215b may cross each other.
  • the angle formed by the crossing first and second virtual lines may be 90 degrees, but is not limited thereto.
  • the second and third position sensor seating grooves 215a and 215b may be exposed or opened outside the side of the base 210 and may be opened to the hollow of the base 210, but are not limited thereto.
  • the second and third position sensor seating grooves may be in the form of recesses recessed from the top surface.
  • the second and third position sensor mounting grooves 215a and 215b may be located at the center of the side surface of the upper surface of the base 210.
  • the first and second position sensor seating grooves 215a and 215b may correspond to or be aligned with or near the center of the second coil 230, and the center of the second coil 230 and the position sensor seating groove. Centers of the second and third position sensors 240a and 240b disposed on the fields 215a and 215b may be aligned with each other, but are not limited thereto.
  • the upper surface of the second and third position sensor mounting grooves 215a and 215b and the upper surface of the base 210 and the upper surface of the base 210 may be coplanar. However, the present invention is not limited thereto.
  • the base 210 may further include a stepped portion 210b protruding from the lower portion of the outer circumferential surface.
  • a stepped portion 210b of the base 210 may guide the cover member 300 and may contact the lower portion of the cover member 300.
  • End portions 210b and ends of the cover member 300 may be adhesively fixed and sealed by an adhesive or the like.
  • the base 210 may include a coupling protrusion 212a protruding from the upper surface to fix the second circuit board 250.
  • Coupling protrusion 212a may be disposed on an upper surface adjacent to an edge of base 210.
  • the coupling protrusion 212a may be located between the edge of the base 210 and the seating groove 213, but is not limited thereto.
  • the number of coupling protrusions 212a may be two or more, and may be disposed to face each other, but is not limited thereto.
  • the printed circuit board on which the image sensor is mounted may be combined with the bottom surface of the base 210 to form a camera module.
  • the second and third position sensors 240a and 240b are disposed under the second circuit board 250.
  • the second and third position sensors 240a and 240b may be disposed in the position sensor seating grooves 215a and 215b of the base 210, and the housing 140 may be in the second direction and / or the third direction. It can detect movement in the direction.
  • the second and third position sensors 240a and 240b may detect a change in the magnetic field emitted from the magnet 130.
  • the second and third position sensors 240a and 240b may be Hall sensors.
  • the second and third position sensors 240a and 240b may be any sensors as long as they can detect a magnetic field change.
  • the second and third position sensors 240a and 240b may be arranged to be aligned with the center of the second coil 230, but is not limited thereto.
  • the second and third position sensors 240a and 240b may be electrically connected to the second circuit board 250 by soldering or soldering.
  • the second coil 230 may be disposed on the upper surface of the second circuit board 250, and the position sensors 240a and 240b may be disposed on the lower surface of the second circuit board 250.
  • the position sensors 240a and 240b, the second coil 230 and the magnet 130 may be disposed on the same axis, but are not limited thereto.
  • the second circuit board 250 is disposed on the upper surface of the base 210, and the hollow 101 of the bobbin 110, the hollow 201 of the housing 140, and / or the hollow of the base 210.
  • a corresponding hollow can be provided.
  • the shape of the outer circumferential surface of the second circuit board 250 may be a shape coinciding with or corresponding to the upper surface of the base 210, for example, a rectangular shape.
  • the second circuit board 250 may include at least one second terminal surface 250a that is bent from the top surface and has a plurality of terminals or pins for receiving electrical signals from the outside. Can be.
  • the second circuit board 250 may include terminals for the second coil, terminals for the second and third position sensors, and terminals for the first circuit board on the terminal surface 250a.
  • the terminals for the second coil may be terminals to which signals for driving the second coils 230a to 230d are input.
  • the number of terminals for the second coil required to independently drive each of the four second coils 230a to 230d may be eight in total.
  • the number of terminals for the second coil required to independently drive the second direction coils 230a and 230b and the third direction coils 230c and 230d may be four in total.
  • the terminals for the second coil may be electrically connected to the pads 253 of the second circuit board 250 through the wiring pattern of the second circuit board 250.
  • the terminal for the second position sensor may include two input terminals and two output terminals
  • the terminal for the third position sensor may include two input terminals and two output terminals.
  • the number of terminals for the second and third position sensors may be six in total.
  • the terminals for the first circuit board may be terminals electrically connected to the first circuit board 170. Since the first coil 120 and the first position sensor 190 are electrically connected to the first circuit board 170, the terminals for the first circuit board may connect the first coil 120 and the first position sensor 190. It may include terminals for.
  • the first position sensor 190 includes a hall sensor and a driver for I2C communication
  • the first power source VCC, the second power source GND, the synchronization clock signal SCL, and the data bit information Four terminals may be needed for (SDA).
  • the total number of terminals for the first circuit board may be four when the first position sensor 190 is integrated with the hall sensor and driver.
  • the total number of terminals for the first circuit board may be four.
  • the upper and lower elastic members 150 and 160 are not divided, and the first and second elastic substrates 150 and 160 are connected to the first coil 120 by the first circuit board 170, the second circuit board 250, and the elastic support members 220a to 220d.
  • the total number of terminals for the first circuit board may be six.
  • Terminals for the first circuit board of the second circuit board 250 may be electrically connected to the first circuit board 170 by the elastic support members 220a to 220d to be described later.
  • the second circuit board 250 may be a flexible printed circuit board (FPCB), but the present invention is not limited thereto, and terminals of the circuit board may be configured on the surface of the base 210 using a surface electrode method.
  • FPCB flexible printed circuit board
  • the second circuit board 250 may include at least one terminal or pad to which the line of sight or the vertical line of the second coil 230 is electrically connected.
  • the second circuit board 250 may include a first terminal to which the eyes of the second coils 230a and 230b for the second direction are electrically connected, and vertical lines of the second coils 230a and 230b for the second direction may be electrically connected.
  • the second circuit board 250 may include a through hole 251 that is coupled to the coupling protrusion 212a of the base 210. There may be a plurality of through holes 251 of the circuit board 250 and may be disposed to face each other.
  • the through hole 251 may be disposed between the first terminal and the third terminal of the second circuit board 250 and between the second terminal and the fourth terminal.
  • the second circuit board 250 may include second pads 252a to 252d to which one end of the elastic support members 220a to 220d are connected.
  • the second pads 252a to 252d may have grooves or through holes through which one end of the elastic support members 220a to 220d may be inserted.
  • Each of the second pads 252a to 252d may be disposed adjacent to an edge of the second circuit board 250, but is not limited thereto.
  • the second pads 252a to 252d may be electrically connected to the plurality of pins provided on the terminal surfaces 251a and 251b by a wiring pattern formed on the second circuit board 250.
  • the second coils 230a to 230d are disposed on the upper surface of the second circuit board 250 so as to correspond to or face the magnets 130.
  • the second coils 230a to 230d are disposed on the upper surface of the second circuit board 250, but are not limited thereto. In another embodiment, the second coils 230a to 230d may be separate circuit boards from the second circuit board 250. The coil may be included in the structure, and may be disposed in close contact with the base 210, or may be disposed spaced apart from the base 210 by a predetermined distance.
  • the second coils 230a to 230d may be aligned on the same axis as the magnet 130, but are not limited thereto. In another embodiment, the second coils 230a to 230d are disposed to have a separation distance greater than the separation distance from the magnet 130 from the virtual central axis passing through the hollow 101 of the bobbin and the hollow 201 of the housing 140. Or may be arranged to have the same separation distance.
  • a total of four second coils 230a to 230d may be installed on the upper surface of the second circuit board 250 to be spaced apart from each other.
  • the second coils 230a to 230d are second coils 230a and 230b for the second direction aligned to be parallel to the second direction, and second coils for the third direction aligned to be parallel to the third direction.
  • 230c and 230d are second coils 230a and 230b for the second direction aligned to be parallel to the second direction.
  • Another embodiment may include a second coil including one second coil for the second direction and one second coil for the third direction, and another embodiment may include three or more second coils for the second direction. Coils, and three or more third coils for the third direction.
  • the second coils 230a to 230d may be in the form of a ring or a donut-shaped wire, and may be electrically connected to the second circuit board 250.
  • the second coils 230a to 230d may be electrically connected to terminals of the second circuit board 250.
  • the elastic support members 220a to 220d electrically connect the first circuit board 170 and the second circuit board 250.
  • the first upper surface portion of the first circuit board 170 includes one or more first corner regions
  • the second upper surface portion of the second circuit board 250 includes one or more second corner regions corresponding to the first corner regions. It may include. At least one of the elastic support members 220a to 220d may be disposed between the first corner region and the second corner region.
  • the first corner region may be an area within a predetermined distance from an edge of the first upper surface of the first circuit board 170, and the second corner region may be predetermined from the second upper surface of the second circuit board 250. It may be an area within a distance.
  • first pads 174a to 174d may be provided in the first corner region of the first circuit board 170, and the second pads 252a to 252d may be the second of the second circuit board 250. It may be provided in the corner area.
  • one end of the elastic support members 220a through 220d may be electrically connected to the first pads 174a through 174d of the first circuit board 170, and the other end thereof may be made of the second circuit board 250.
  • the second pads 252a to 252d of the second circuit board 250 may be electrically connected to the second pads 252a to 252d, and the terminal surface 250a may be formed by the wiring pattern of the second circuit board 250. It may be electrically connected to the terminals for the first circuit board provided in.
  • the lens driving apparatus of FIG. 2 may include elastic support members 220a to 220d facing each other.
  • the number of elastic support members connecting the first corner region of each first circuit board 170 and the second corner region of the second circuit board 250 may be one.
  • the elastic support members 220a to 220d may be point symmetric in the second and third directions perpendicular to the first direction with respect to the center of the housing 140 or the center of the hollow 201 of the housing 140. .
  • the number of elastic support members 220a to 220d may be greater than or equal to the number of terminals for the first circuit board.
  • the number of the elastic support members 220a to 220d may be four or more.
  • the number of the elastic support members 220a to 220d may be six or more.
  • the second pads 252a to 252d of the second circuit board 250 may be electrically connected to the terminals for the first circuit board formed on the second terminal surface 250a of the second circuit board 250.
  • the elastic support members 220a to 220d may serve as passageways through which electrical signals between the second circuit board 250 and the first circuit board 170 move, and the housing 140 may be elastic with respect to the base 210. Can be supported by
  • the elastic support members 220a to 220d may be formed as a separate member from the upper elastic member 150 and may be supported by elastic members, such as leaf springs, coil springs, It may be implemented by a suspension wire or the like. In another embodiment, the elastic support members 220a to 220d may be integrally formed with the upper elastic member.
  • FIG. 18 is a plan view of a lens driving apparatus according to another exemplary embodiment
  • FIG. 19 is a perspective view of the lens driving apparatus illustrated in FIG. 18. 18 and 19, the cover member 300 is omitted.
  • the lens driving apparatus 100 illustrated in FIG. 2 includes four elastic support members, but the elastic support members 220-1 to 220-6 shown in FIG. It can be six. Except for the number of elastic members, the description of the lens driving apparatus 100 illustrated in FIG. 2 may be equally applied to the exemplary embodiment illustrated in FIG. 18.
  • the elastic support members 220-1 to 220-6 are dots in the second and third directions perpendicular to the first direction with respect to the center of the housing 140 or the center of the hollow 201 of the housing 140. It may be symmetrical.
  • the elastic support members 220-1 to 220-6 are point symmetric in a second direction perpendicular to the first direction with respect to the center of the housing 140 or the center of the hollow 201 of the housing 140.
  • the number of the first elastic support members 220-1 and 220-4 and the second elastic support members 220-2, 220-3, 220-5, and 220-6 may be different from each other.
  • the number of second elastic support members 220-2, 220-3, 220-5, and 220-6 may be greater than the number of first elastic support members 220-1 and 220-4.
  • First elastic support members for the bobbin 110 to symmetrically or equalize the elastic force in the second and third directions of the elastic support members 220-1 to 220-6 for the bobbin 110.
  • the sum of the elastic forces of (220-1, 220-4) and the elastic force of the second elastic support members (220-2, 220-3, 220-5, 220-6) for the bobbin 110 may be the same. Can be.
  • the second The elastic modulus of the elastic support members 220-2, 220-3, 220-5, and 220-6 may be one half of the elastic modulus of the first elastic support members 220-1 and 220-4.
  • FIG. 20 is a plan view of a lens driving apparatus according to still another embodiment
  • FIG. 21 is a perspective view of the lens driving apparatus shown in FIG. 20.
  • the cover member 300 is omitted. Except for the number of elastic members, the description of the lens driving apparatus 100 illustrated in FIG. 2 may be equally applied to the exemplary embodiment illustrated in FIG. 20.
  • the number of elastic support members 220-1 ′ through 220-8 ′ may be a total of eight.
  • the elastic support members 220-1 ′ through 220-8 ′ are first elastic support members 220-1 and 220 that are point symmetric in a second direction perpendicular to the first direction with respect to the center of the housing 140. 2, 220-5 ′, 220-6 ′), and second elastic support members 220-point symmetric in a third direction perpendicular to the first direction and the second direction with respect to the center of the housing 140. 3 ', 220-4', 220-7 ', 220-8').
  • the number of the first elastic support members 220-1 'and 220-4' and the second elastic support members 220-2 ', 220-3', 220-5 ', and 220-6' are the same. At least one of the first and second elastic support members 220-1 ′ through 220-8 ′ may electrically connect the first circuit board 170 and the second circuit board 250. In addition, the elastic modulus of the first and second elastic support members 220-1 ′ through 220-8 ′ may be the same.
  • FIG. 22 is an exploded perspective view of the lens driving apparatus 200 according to another embodiment
  • FIG. 23 is a combined perspective view of the lens driving apparatus 200 of FIG. 22 with the cover member 300 removed.
  • the same reference numerals as those in Figs. 2 and 3 denote the same configuration, and the description of the same configuration will be simplified or omitted.
  • the lens driving apparatus 200 includes a cover member 300, an upper elastic member 150, a bobbin 110, a first coil 1120, a housing 140, and a first magnet ( 1130, lower elastic member 160, elastic support members 220a to 220d, first position sensor 180, second magnet 185, second coil 230, second circuit board 250, base 210 and second and third position sensors 240a and 240b.
  • the lens driving apparatus 100 of FIG. 2 includes only a driving magnet 130, but the lens driving apparatus 200 of FIG. 22 may include a first magnet 1130 for driving and a second magnet 185 for sensing. Can be.
  • the driving magnet 130 of the lens driving apparatus 100 is disposed on the outer circumferential surface of the bobbin 110, but the first magnet 1130 of the lens driving apparatus 200 corresponding thereto may be disposed in the housing 140. have.
  • first coil 120 of the lens driving apparatus 100 may be disposed in the housing 140, but the first coil 1120 of the lens driving apparatus 200 may be disposed on the outer circumferential surface of the bobbin 1110.
  • FIG. 24 is a perspective view illustrating a coupling of the upper elastic member 150, the second magnet 185, and the bobbin 1110 of FIG. 22.
  • a magnet seating groove 116 having a size corresponding to that of the second magnet 185 may be provided on an outer circumferential surface of the bobbin 1110.
  • the position of the second magnet seating groove 116 may be determined according to the arrangement position of the second magnet 185 and the arrangement position of the first coil 1120.
  • the magnet seating groove 116 is positioned in the second region P2 of the outer circumferential surface 110a of the bobbin 1110. Can be located.
  • the magnet seating groove 116 may have the first region (the outer circumferential surface 110a of the bobbin 1110). It may be located at P1).
  • the first region P1 of the outer circumferential surface 110a of the bobbin 1110 may be an area located below the reference line 115-1 of the outer circumferential surface 110a of the bobbin 110, and may have an outer circumferential surface of the bobbin 1110.
  • the second region P2 of 110a may be a region located above the reference line 115-1 of the outer circumferential surface 110a of the bobbin 1110.
  • the reference line 115-1 of the outer circumferential surface 110a of the bobbin 1110 may be a line spaced apart from the lower end of the outer circumferential surface 110a of the bobbin 1110 by a reference distance, and the reference distance may be defined by It may be a distance that is 2/3 to 1/2 of the distance between the top and the bottom, but is not limited thereto.
  • the second magnet 185 will be described.
  • the second magnet 185 may detect or determine a displacement value (or position) of the bobbin 1110 in the first direction together with the first position sensor 190.
  • the second magnet 185 may be divided into two to increase the strength of the magnetic field, but is not limited thereto.
  • the second magnet 185 may be disposed on the outer circumferential surface of the bobbin 1110 so as not to overlap with the first coil 1120 in a direction perpendicular to the optical axis.
  • the second magnet 185 may be disposed in the magnet seating groove 116 formed on the outer circumferential surface 110a of the bobbin 1110, and the position of the magnet seating groove 116 is as described above. 185 may not overlap with the first coil 1120 in a direction perpendicular to the optical axis.
  • the second magnet 185 may be fixed to the magnet seating groove 116 by an adhesive member such as an epoxy, but is not limited thereto.
  • the second magnet 185 may be fitted to the magnet seating groove 116 to be fixed. It may be.
  • the second magnet 185 is disposed on the outer circumferential surface 110a of the bobbin 1110, and the first position sensor 190 is disposed on the outer circumferential surface of the housing 140, but in another embodiment, the opposite is true. Can be.
  • the first position sensor 190 may be disposed in the bobbin 1110, and the second magnet 185 may be disposed in the housing 140, in this case, the outer circumferential surface of the bobbin 1110.
  • a surface electrode (not shown) may be formed in the first position sensor 190, and the first position sensor 190 may receive a current through the surface electrode (not shown).
  • the first coil 1120 is disposed on the outer circumferential surface 110a of the bobbin 1110.
  • the first coil 1120 may be disposed in the first region P1 of the outer circumferential surface 110a of the bobbin 1110 so as not to overlap with the second magnet 185.
  • the first coil 1120 may be wound to surround the outer circumferential surface of the bobbin 110 in a direction rotating about the optical axis.
  • the first coil 120 may include a plurality of coil blocks, and each of the coil blocks may have a ring shape.
  • each of the coil blocks may be disposed on a corresponding one of the first surfaces 115a and may be polygonal, eg, octagonal or circular.
  • the ring shape of each of the coil blocks may be at least four sides straight, and the corner portion connecting the four sides may be round or straight.
  • the first coil 1120 is below the second magnet 185 so that the first coil 1120 and the second magnet 185 do not overlap in a direction perpendicular to the optical axis or in a horizontal direction. Can be placed in.
  • FIG. 25 is a perspective view of the upper elastic member 150 coupled with the housing 140 on which the bobbin 1110 and the first magnet 1130 of FIG. 22 are mounted.
  • the first magnet 1130 is disposed on the outer circumferential surface of the housing 140 to correspond to the first coil 1120.
  • the first magnet 1130 may be disposed on the supports 720-1 to 720-4 of the housing 140.
  • the first magnet 130 may be disposed on the first and second side surfaces 720-1 and 720-2 of the supports 720-1 to 720-4.
  • the first magnet 1130 may be fixed to the supports 720-1 to 720-4 of the housing 140 using an adhesive member such as an adhesive or a double-sided tape.
  • the number of the first magnets 1130 may be one or more. For example, four first magnets may be spaced apart from each other and disposed on the first and second side surfaces 720-1 and 720-2 of the supports 720-1 to 720-4 of the housing 140. .
  • 26 is a perspective view of a lens driving apparatus according to another exemplary embodiment.
  • the cover member 300 is omitted.
  • the embodiment illustrated in FIG. 26 may further include a first damper DA1, a second damper DA2, and a third damper DA3.
  • the first damper DA1, the second damper DA2, and the third damper DA3 may include one or a combination of two or more.
  • the first damper DA1 may be provided on a portion at which one end of the elastic support members 220a to 220d and the first circuit board 170 are electrically connected.
  • the first damper DA1 may be applied on a portion where one end of the elastic support members 220a to 220d and the first pads 174a to 174d of the first circuit board 170 are bonded.
  • the second damper DA2 may be provided on a portion at which the other ends of the elastic support members 220a to 220d and the second circuit board 250 are electrically bonded.
  • the second damper DA2 may be applied on a portion where the other ends of the elastic support members 220a to 220d and the second pads 252a to 252d of the second circuit board 250 are bonded.
  • the third damper DA3 may be provided between the through groove 751 of the housing 140 and the elastic support members 220a through 220d inserted into the through groove 751. These dampers DA1 to DA3 may prevent the oscillation phenomenon when the bobbin 110 moves.
  • FIG. 27 is a perspective view of a lens driving apparatus according to still another embodiment, and FIG. 27 is a view in which the cover member 300 is omitted.
  • the upper elastic member 150P illustrated in FIG. 27 may be implemented by integrating the upper elastic member 150 and the first circuit board 170 illustrated in FIG. 2 or 22.
  • the upper elastic member 150P illustrated in FIG. 27 may include an inner frame 151, an outer frame 152, and a connecting portion 153 serving as an elastic support.
  • the shape of the upper elastic member 150P may be the same as described above with respect to the upper elastic member 150.
  • the upper elastic member 150P illustrated in FIG. 27 may include a circuit pattern electrically connected to one end of the elastic support members 220a to 220d.
  • wires electrically connected to one end of each of the elastic support members 220a to 220d may be formed in the outer frame 152 of the upper elastic member 150P.
  • the upper elastic member 150P may include a terminal surface 150PA that is bent downward from one end of the outer frame 152.
  • the terminal surface 150PA of the upper elastic member 150P may include a plurality of terminals or pins through which an electrical signal is input from the outside.
  • the terminal surface of the upper elastic member 150P may play the same role as the terminal surface 170a of the first circuit board 170 described above.
  • coil 1 may be a second coil 230a
  • coil 3 may be a second coil 230b
  • coil 2 may be a second coil 230c
  • coil 4 may be a second coil 230d. have.
  • the moving part 60 may be positioned above the second circuit board 250 and the base 210 at an initial position.
  • the initial position may be a position where the movable part 60 is placed as the upper and lower elastic members 150 and 160 are elastically deformed only by the weight of the movable part 60.
  • the initial position may be desirable to set the initial position to a moving distance that can compensate for about 0.5 ° to 1.5 °, and converting it into a focal length of the lens, the movable part 60 having a focal length of the lens of about 50um to 150um ) May be located.
  • the AF movable unit 60 may include components mounted on the bobbins 110 and 1110 and the bobbins 110 and 1110, and the AF fixing unit may include components mounted to the housing 140 and the housing 140. have.
  • the AF movable part 60 may include a magnet 130, a bobbin 110, and a lens (not shown) mounted on the bobbin 110, and the AF fixing part may include a housing 140 and a cover member.
  • the base 210, the second coils 230a to 230d, and the second circuit board 250 may be included.
  • the AF moving parts may include bobbins 110 and 1110, a first coil 1120, and a second magnet 185
  • the AF fixing part may include a housing 140, a first magnet 1130, and a cover member.
  • 300, the base 210, the second coils 230a to 230d, and the second circuit board 250 may be included.
  • the OIS moving part for image stabilization may include an AF moving part and upper and lower elastic members 150 and 160, a first circuit board 170, and a first position sensor 190, and fix the OIS.
  • the part may include a housing 140, a cover member 300, a base 210, a second circuit board 250, and second coils 230a to 230d.
  • the OIS movable part may include an AF movable part and upper and lower elastic members 150 and 160, a first circuit board 170, and a first position sensor 190
  • the OIS fixing part may include a housing 140,
  • the cover member 300, the base 210, and the second coils 230a to 230d may be included.
  • the AF operation may be performed in a first direction, for example, an upper direction (+ Z axis direction) and a lower direction ( ⁇ Z axis direction) based on an initial position by an electromagnetic force between the magnets 130 and 1130 and the first coils 120 and 1120.
  • a first direction for example, an upper direction (+ Z axis direction) and a lower direction ( ⁇ Z axis direction) based on an initial position by an electromagnetic force between the magnets 130 and 1130 and the first coils 120 and 1120.
  • autofocusing may be performed by controlling the direction of the current flowing in the first coil 120 1120.
  • the embodiment may be miniaturized, and the movable part 60 may be moved to a desired place with little electromagnetic force.
  • the bobbin 110 and the base 210 may be spaced apart from each other to perform auto focusing in the upward direction and the downward direction based on the initial position.
  • OIS operation is based on the value measured by the gyro sensor, by the electromagnetic force generated between the magnets (130, 1130) and the second coil (230a to 230d) the moving part 60 in the -X axis direction, + X axis direction, To move in the -Y axis direction or the + Y axis direction.
  • Each of the four second coils 230a to 230d may be independently driven for the OIS operation. For example, by independently controlling the direction of the current flowing through each of the four second coils 230a to 230d, the movable unit 60 may be moved to the X axis and / or the Y axis. As a result, the embodiment may be able to correct an image in a free direction.
  • FIG. 29 illustrates the moving direction of the movable part 60 under the control of the second coils 230a to 230d according to the first embodiment.
  • 0 may mean not driving and 1 may mean driving.
  • 0 may mean that no current is applied
  • 1 may mean that current is applied to the second coil such that the electromagnetic force acts in the direction of the second coil in the movable unit 60.
  • the movable unit 60 may move in the + X direction, the -X direction, the + Y direction, the -Y direction, the X + Y + direction, It may not move in any of the X-Y + direction, the X + Y- direction, and the XY- direction, or may not move in the X- and Y-axis directions.
  • auto focusing and OIS operations may be simultaneously performed.
  • auto focusing and OIS operations may be simultaneously performed by adjusting the levels of signals provided to the first coil 120 and the second coils 230a to 230d.
  • FIG. 30 is a view showing a moving direction of the movable unit 60 under the control of the second coils 230a to 230d according to the second embodiment.
  • two pairs of second coils 230a, 230b, 230c, and 230d electrically connected to each other are electrically connected to two second coils 230a and 230b, 230c, and 230d facing each other.
  • auto focusing and OIS operations may be simultaneously performed.
  • auto focusing and OIS operations may be simultaneously performed by adjusting the levels of signals provided to the first coil 120 and the second coils 230a to 230d.
  • 31 illustrates the position of the movable unit 60 according to the strength of the current applied to the first coil 120.
  • the movable part 60 may be moved in the upper direction and the lower direction with respect to the initial position 0.
  • the moving distance (eg, 200 ⁇ m) in the upper direction of the movable part 60 based on the initial position 0 may be greater than the moving distance (eg, 100 ⁇ m) in the downward direction of the movable part 60. This is to minimize the consumption value of current and voltage in an area of 50 cm or more, which is the area used most by the user.
  • the upward movement distance may be the distance from the initial position 0 to the upper stopper of the movable part 60
  • the downward movement distance may be the distance from the initial position 0 to the lower stopper of the movable part 60. .
  • the camera module may include the lens driving apparatuses 100 and 200 described above, a lens barrel coupled to the bobbins 110 and 1110, an image sensor, and a printed circuit board.
  • the image sensor may be mounted on a printed circuit board, and the printed circuit board may form the bottom surface of the camera module.
  • the camera module according to the embodiment may further include an infrared cut filter disposed in one region of the base corresponding to the image sensor.
  • the base 210 may be provided with a separate terminal member for energizing the printed circuit board of the camera module, or may be formed integrally with the base 210 by using a surface electrode or the like.
  • the base 210 may function as a sensor holder to protect the image sensor, in this case, a protrusion may be formed to protect the image sensor in the downward direction along the side of the base 210.
  • the protrusion is not an essential configuration, and in another embodiment, a separate sensor holder may be disposed under the base 210 to perform its role.
  • the camera module according to the embodiment may further include a focus control unit for controlling the focus of the lens.
  • a focus control unit for controlling the focus of the lens.
  • the focus control unit will be described with reference to the lens driving apparatuses 100 and 200 described above, but the embodiment is not limited thereto. That is, the focus controller according to the embodiment may be applied to the lens driving apparatus having a different configuration from the above-described lens driving apparatus to perform the auto focus function.
  • 32A to 32D illustrate a driving algorithm according to an embodiment for an auto focusing operation.
  • the horizontal axis in FIG. 32A represents the focal length, and the vertical axis represents displacement in a direction parallel to the optical axis, for example, in the + Z axis direction and the -Z axis direction.
  • 32B to 32D the horizontal axis represents time, and the vertical axis represents displacement.
  • a first method will be described with reference to FIG. 32B.
  • the movable part 60 is moved to the first point P1 that can move to the maximum in the -Z axis direction.
  • the moving unit 60 is photographed while moving the moving unit 60 at a predetermined speed from the first point P1 to the second point P2 that can move as much as possible in the + Z direction, and is optimal among the photographed images. Find the optimal focal length that corresponds to the image.
  • the movable part 60 is moved to the 2nd point P2 which can move to the maximum in the + Z axis direction.
  • the subject is photographed while moving the movable part 60 at a predetermined speed from the second point P2 to the first point P1 that can move as much as possible in the -Z axis direction, and is optimal among the photographed images. Find the optimal focal length that corresponds to the image.
  • a third method will be described with reference to FIG. 32D.
  • the photographing of the subject is performed while the movable unit 60 is moved from the initial position 0 to the first distance d1 in either the + Z axis direction or the -Z axis direction. Next, the movable part 60 is moved to the initial position (0).
  • the photographing of the subject is performed while the movable unit 60 is moved from the initial position 0 to the second distance d2.
  • the moving direction of the movable part 60 from the initial position 0 to the second distance d2 may be the opposite direction to the moving direction of the movable part 60 from the initial position 0 to the first distance d1.
  • imaging is performed while moving the movable part 60 from the point which is the 2nd distance d2 to the initial position 0.
  • FIG. The optimal focal length corresponding to the optimal image is found among the photographed images.
  • FIG. 33A is a block diagram illustrating a focus control unit 400 according to an embodiment
  • FIG. 33B is a flowchart according to an embodiment of an autofocus control method performed by the focus control unit 400 illustrated in FIG. 33A.
  • the focus controller 400 controls the interaction between the first coils 120 and 1120 and the magnets 130 and 1130 according to the subject information, thereby adjusting the interaction in the first direction parallel to the optical axis.
  • the auto focus function may be performed by moving the bobbins 110 and 1110 by one movement amount (or first displacement amount).
  • the focus control unit 400 may include an information acquisition unit 410, a bobbin position search unit 420, and a movement amount control unit 430.
  • the information acquirer 410 may acquire subject information (S210).
  • the subject information may include at least one of a distance between the subject and at least one lens (not shown), a distance between the subject and the image sensor, a position of the subject, or a phase of the subject.
  • the subject information may be obtained in various ways.
  • subject information may be acquired using two cameras.
  • subject information may be obtained using a laser.
  • Korean Patent Publication No. 1989-0008573 discloses a method of measuring a distance of an object using a laser.
  • subject information may be obtained using a sensor.
  • U.S. Patent Application Publication No. US 2013/0033572 discloses a method of obtaining a distance between a camera and a subject using an image sensor.
  • the bobbin position search unit 420 may find the positions of the focused bobbins 110 and 1110 corresponding to the subject information acquired by the information acquisition unit 410 (S220).
  • the bobbin position search unit 420 may include a data extractor 422 and a look up table (LUT) 424.
  • LUT look up table
  • the lookup table 424 may map and store the positions of the bobbins 110 and 1110 that are in focus for each object information.
  • the positions of the bobbins 110 and 1110 to have an optimal focus for each distance between the subject and the lens may be obtained in advance and stored in the form of a look-up table 324.
  • the lookup table 324 may be generated using the first position sensor 190 before moving the bobbins 110 and 1110 by the first movement amount in step S230.
  • the lookup table 424 may be generated by measuring the positions of the bobbins 110 and 1110 when the focus is focused for each object information, which is a distance between the subject and the lens.
  • the measured positions of the bobbins 110 and 1110 may be encoded and stored in the lookup table 424.
  • the data extracting unit 422 receives the subject information acquired by the information obtaining unit 410, extracts the positions of the focused bobbins 110 and 1110 corresponding to the subject information from the lookup table 424, and extracts the extracted information.
  • the positions of the bobbins 110 and 1110 may be output to the movement amount adjusting unit 430.
  • the data extractor 422 may find a code value corresponding to the subject information in the lookup table 424. Can be.
  • the movement amount adjusting unit 430 may move the bobbins 110 and 1110 by the first movement amount (or the first displacement amount) to the position found by the bobbin position search unit 420 (S230).
  • the movement amount adjusting unit 430 may move the bobbins 110 and 1110 by the first movement amount in the first direction by adjusting an amount of current or a code value applied to the first coils 120 and 1120. To this end, the amount of current for each position of the bobbins 110 and 1110 may be determined in advance.
  • the first position sensor 190 may detect a change in magnetic force emitted from the second magnet 185 coupled to the bobbin 1110, The amount of change in the output current can be detected based on the detected amount of change in the magnetic force.
  • the movement amount adjusting unit 430 may calculate or determine a current position of the bobbins 110 and 1110 based on the amount of change in current detected by the first position sensor 190.
  • the amount of applied current for moving the bobbins 110 and 1110 to the focused position by the first movement amount may be determined by referring to the current position of 1110.
  • 34A and 34B are graphs for explaining the auto focus function according to the comparative example, in which the horizontal axis represents focus value and the vertical axis represents displacement, and the horizontal axis represents current (or time) in FIG. 34B, and the vertical axis represents Represents a displacement (or code).
  • 35A and 35B are graphs illustrating an auto focus function according to an embodiment, in which the horizontal axis represents a focus value and the vertical axis represents a displacement, and the horizontal axis represents a current (or time) in FIG. 35B, and the vertical axis Represents a displacement (or code).
  • the bobbin 110 having the best focus while increasing the current applied to the first coils 120 and 1120 from the first reference focal length Infinity to the second reference focal length Macro is shown. Find the location (or displacement) 400 of, 1110.
  • the first reference focal length may be a focal length when the lens and the image sensor are farthest
  • the second reference focal length may be a focal length at the closest position with the lens and the image sensor, but is not limited thereto.
  • the first reference focal length may be a focal length at a position where the lens and the image sensor are closest to each other
  • the second reference focal length may be a focal length when the lens and the image sensor are at the farthest position.
  • the bobbins 110 and 1110 may not be driven during the initial predetermined time (P). Thereafter, the displacement of the bobbins 110 and 1110 may increase as the current 402 (or the code value 404 corresponding to the change amount of the magnetic force detected by the first position sensor 190) continues to increase.
  • the code for the position of the bobbin 110 in focus of the lens is found in the look-up table 424 based on the subject information, and based on the bobbin 110, 1110 may be immediately moved to the focal position (or displacement) 410 by the first movement amount. Therefore, it can be seen that the time required for focusing the lens is shortened when compared with the aforementioned comparative example.
  • the lens may be finely focused (steps S240 to S260).
  • 36A and 36B are graphs for explaining fine adjustment in the auto focus function according to an embodiment.
  • the horizontal axis represents a focus value and the vertical axis represents a displacement.
  • the horizontal axis represents a current (or time).
  • the vertical axis represents the displacement (or code).
  • the focus controller 400 performs the step S230 of moving the bobbins 110 and 1110 by the first movement amount, and thereafter, the bobbin 110 is within a range of the second movement amount smaller than the first movement amount.
  • 1110 may be moved to find a focal position of the bobbin 110 showing the largest value of the Modulation Transfer Function (MTF) (S240).
  • MTF Modulation Transfer Function
  • the MTF value may be a value obtained by quantifying the resolution.
  • the focus controller 400 determines whether the bobbins 110 and 1110 have been moved for a predetermined period to find the largest MTF value (S250). Alternatively, in order to find the largest MTF value, the focus controller 400 may determine whether the bobbins 110 and 1110 have been moved a predetermined number of times (S250). Alternatively, the bobbins 110 and 1110 may continue to move beyond a predetermined period or more than a predetermined number of times until the largest MTF value is found.
  • the positions of the bobbins 110 and 1110 showing the largest MTF values may be determined as the final focal position where the lens is finally focused ( S260).
  • the camera module according to the embodiment may improve the resolution by accurately focusing the lens.
  • FIG. 37 is a flowchart of another example of an auto focus control method performed by the focus controller 400 illustrated in FIG. 33A.
  • steps S210 to S230 shown in FIG. 33B are performed.
  • the focus controller 400 determines whether the direction in which the bobbins 110 and 1110 are moved by the first movement amount is an upward direction or a downward direction based on the initial positions of the bobbins 110 and 1110 (S310).
  • the initial positions of the bobbins 110 and 1110 may be positions of the bobbins 110 and 1110 immediately before the bobbins 110 and 1110 move by the first movement amount.
  • the focus control unit 400 may finely adjust the positions of the bobbins 110 and 1110, and the focus of the lens may be finely adjusted.
  • steps S240 to S260 described in FIG. 33B may be equally applied to fine adjustment in the downward direction.
  • steps S240 to S260 described in FIG. 33B may be identically applied.
  • 38 is a schematic cross-sectional view of a lens driving apparatus 1200A according to another embodiment.
  • the lens driving device 1200A illustrated in FIG. 38 includes a fixing part 1210, a moving part 1220, lower and upper springs 1230 and 1240, a positive magnetizing magnet (or a bipolar magnetizing magnet) 1250, and a position sensor. 1260.
  • the position sensor 1260 may be a driver including a position detection sensor or a position detection sensor.
  • the fixing part 1210 may include a lower part 1212, a side part 1214, and an upper part 1216.
  • the lower part 1212 of the fixing part 1210 may support the movable part 1220 in an initial stationary state, or The movable part 220 may be supported in an initial stop state by being spaced a predetermined distance from the lower portion 1210 of the fixing part 210 by the lower springs 1230 and 1240.
  • the side portion 214 of the fixing portion 1210 may serve to support the lower spring 1230 and the upper spring 1240, the lower portion 1212 and / or upper portion 1216 of the fixing portion 1210. May support the lower and / or upper springs 1230 and 1240.
  • the fixing part 1210 may correspond to the housing 140 in the lens driving apparatus 100 described above, may include a cover member 300, or may further include a base 210. .
  • the movable unit 1220 may be mounted with at least one lens (not shown).
  • the movable part 1220 may correspond to the bobbin 1110 in the lens driving apparatus 200 described above, but the embodiment is not limited thereto.
  • the lens driving apparatus 1200A may further include a first coil and a magnet.
  • the first coil and the magnet included in the lens driving apparatus 1200A may be disposed to face each other to move the movable part 1220 in the z-axis direction, which is the optical axis direction of the lens.
  • the first coil and the magnet may correspond to the first coil 1120 and the first magnet 1130 of the lens driving apparatus 200 described above, but embodiments are not limited thereto.
  • the movable part 1220 is shown to be able to move in one direction of the optical axis (ie, the + z axis direction), as described below, the movable part 1220 according to another embodiment may have both directions of the optical axis (ie, the + z axis). Direction or -z axis direction).
  • the first position sensor 1260 may detect a first displacement value in the z-axis direction, which is the optical axis direction of the movable unit 1220.
  • the first position sensor 1260 may sense a magnetic field of the anode magnetizing magnet 1250 and output a voltage having a level proportional to the intensity of the sensed magnetic field.
  • the anode magnetizing magnets 1250 are arranged in the y-axis direction, which is the magnetization direction in which opposite polarities are arranged with respect to a plane perpendicular to the optical axis direction. It may be disposed to face the first position sensor 1260.
  • the first position sensor 1260 may correspond to the first position sensor 190 of the lens driving apparatus 200 described above, and the anode magnetizing magnet 1250 may correspond to the lens driving apparatus 200 described above. This may correspond to the first magnet 1130, but the embodiment is not limited thereto.
  • the types of the anode magnetizing magnet 1250 can be broadly classified into ferrite, alnico, and rare earth magnets, and can be classified into Ptype and F-type according to the shape of the magnetic circuit. Can be. The embodiment is not limited to this kind of bipolar magnet 1250.
  • the anode magnetizing magnet 1250 may include a side surface facing the first position sensor 1260.
  • the side surface may include a first side surface 1252 and a second side surface 1254.
  • the first side surface 1252 may be a face having a first polarity
  • the second side surface 1254 may be a face having a second polarity opposite to the first polarity.
  • the second side surface 1254 may be disposed to be spaced apart or in contact with the first side surface 1252 in the z-axis direction, which is a direction parallel to the optical axis direction.
  • the first length L1 in the optical axis direction of the first side surface 1252 may be greater than or equal to the second length L2 in the optical axis direction of the second side surface 1254.
  • the first magnetic flux density of the first side surface 1252 having the first polarity may be greater than the second magnetic flux density of the second side surface 1254 having the second polarity.
  • the first polarity may be the S pole and the second polarity may be the N pole, on the contrary, the first polarity may be the N pole, and the second polarity may be the S pole.
  • 39A and 39B illustrate cross-sectional views according to embodiments 1250A and 1250B of the positive electrode magnetizing magnet 1250 shown in FIG. 38.
  • the anode magnetizing magnet 1250A may include first and second sensing magnets 1250A-1 and 1250A-2, and may further include nonmagnetic partition walls 1250A-3. have.
  • the anode magnetizing magnet 1250B may include first and second sensing magnets 1250B-1 and 1250B-2 and may further include nonmagnetic partition walls 1250B-3. .
  • the first and second sensing magnets 1250A-1 and 1250A-2 illustrated in FIG. 39A may be spaced apart from or in contact with each other in a direction parallel to the optical axis direction (ie, the z-axis direction).
  • first and second sensing magnets 1250B-1 and 1250B-2 shown in FIG. 39B may be spaced apart or in contact with each other in a direction perpendicular to the optical axis or in a magnetizing direction (ie, the y-axis direction). have.
  • the anode magnetizing magnet 1250 shown in FIG. 38 is shown to be a magnet having the structure shown in FIG. 39A, but may be replaced with a magnet having the structure shown in FIG. 39B.
  • nonmagnetic partition 1250A-3 illustrated in FIG. 39A may be disposed between the first and second sensing magnets 1250A-1 and 1250A-2, and the nonmagnetic partition 1250B illustrated in FIG. 39B. -3) may be disposed between the first and second sensing magnets 1250B-1 and 1250B-2.
  • the nonmagnetic partitions 1250A-3 and 1250B-3 may include sections having little polarity as substantially non-magnetic portions, and may also be filled with air or a nonmagnetic material.
  • the third length L3 of the nonmagnetic bulkheads 1250A-3 and 1250B-3 is 5% or more of the total total length LT in a direction parallel to the optical axis direction of the anode magnets 1250A and 1250B, or It may be up to 50%.
  • FIG. 40 is a graph for describing an operation of the lens driving apparatus 1200A of FIG. 38, and the horizontal axis may indicate a distance moved by the movable part 1220 in the z-axis direction which is a direction parallel to the optical axis direction or the optical axis direction.
  • the vertical axis may represent a magnetic field sensed by the first position sensor 1260 or an output voltage output from the first position sensor 1260.
  • the first position sensor 1260 may output a voltage having a level proportional to the strength of the magnetic field.
  • a sensing element of the first position sensor 1260 may be located at the center 1261 of the first position sensor 1260.
  • the intensity of the magnetic field that may be sensed by the first position sensor 1260 may be a value BO that is almost close to '0' but not '0'.
  • the movable part 1220 mounted with the lens and movable only in the unidirectional + z-axis direction is positioned at the lowest position.
  • FIG. 41 is a view illustrating a state in which the lens driving apparatus 1200A illustrated in FIG. 38 is moved in an optical axis direction
  • FIG. 42 is a movable part 1220 according to a current supplied to a first coil in the lens driving apparatus 1200A according to the embodiment.
  • the horizontal axis represents the current supplied to the first coil
  • the vertical axis represents the displacement of the movable part 1220.
  • the strength of the magnetic field that may be detected by the first position sensor 1260 may be B1.
  • the movable part 1220 may be lowered to an initial position as shown in FIG. 38.
  • the electric force of the movable part 1220 is the spring force of the lower and upper springs 1230 and 1240. Must be greater than
  • the electric force is less than the spring forces of the lower and upper springs 1230 and 1240 to restore the movable portion 1220 to its original initial position shown in FIG.
  • the electric force is less than the spring forces of the lower and upper springs 1230 and 1240 to restore the movable portion 1220 to its original initial position shown in FIG.
  • the movable part 1220 may be returned to its original position by the restoring force of the lower and upper springs 1230 and 1240.
  • the lower spring 1230 may include first and second lower springs 1232 and 1234
  • the upper spring 1240 may include first and second upper springs 1242 and 1244.
  • the lower spring 1230 is illustrated as being divided into two as the first and second lower springs 1232 and 1234, the embodiment is not limited thereto. That is, the first and second lower springs 1232 and 1234 may be integrally formed.
  • upper spring 1240 is shown as being separated into two, first and second upper springs 1242 and 1244, but the embodiment is not limited thereto, and as shown in FIG. 2, upper spring 1240 ) May be formed integrally without being divided.
  • the lower spring 1230 and the upper spring 1240 may correspond to the lower and upper elastic members 160 and 150 of the lens driving apparatus 200 described above, but embodiments are not limited thereto.
  • the first position sensor 1260 may detect the magnetic field having the first or second polarity which is linearly changed.
  • FIG. 43 is a sectional view of a lens driving apparatus 1200B according to still another embodiment.
  • the lens driving device 1200B shown in FIG. 43 has the center of the first position sensor 1260 in an initial state before the lens is moved in the optical axis direction.
  • the first point may be any point between the upper end 1252a and the lower end 1252b of the first side 1252, for example, an intermediate point of the first side 1252.
  • the positive electrode magnetizing magnet 1250 of the lens driving apparatus 1200B shown in FIG. 43 is more constant than the positive electrode magnetizing magnet 1250 of the lens driving apparatus 1200A shown in FIG. 38.
  • the distance z2-zh may be located higher.
  • the lowest value of the magnetic field having the first polarity detected by the first position sensor 1260 may be B2 greater than B0.
  • the movable unit 1220 may move up to a maximum height z1 as in the lens driving apparatus 1200A illustrated in FIG. 41.
  • the maximum lifting height of the movable part 1220 may be changed by adjusting the elastic modulus of the lower spring 1230 and the upper spring 1240.
  • the intensity of the magnetic field sensed by the first position sensor 1260 may be substantially from B2 to B1. It can be seen that it changes linearly.
  • the maximum displacement D1 to which the movable part 1220 of the lens driving apparatus 1200B shown in FIG. 43 is movable is z1-z2.
  • FIG 44 is a sectional view of a lens driving apparatus 1200C according to yet another embodiment.
  • the first side surface 1252 is positioned above the second side surface 1254.
  • the second side surface 1254 of the lens driving apparatus 200C illustrated in FIG. 44 may be positioned on the first side surface 1252.
  • 45A and 45B illustrate cross-sectional views according to embodiments 1250C and 1250D of the positive electrode magnetizing magnet 1250 shown in FIG. 44, respectively.
  • the anode magnetizing magnet 1250C may include first and second sensing magnets 1250C-1 and 1250C-2, or may further include nonmagnetic partition walls 1250C-3.
  • the anode magnetizing magnet 1250D may include first and second sensing magnets 1250D-1 and 1250D-2, or may further include a nonmagnetic partition 1250D-3.
  • the first and second sensing magnets 1250C-1 and 1250C-2 are spaced apart from or in contact with each other in a direction parallel to the optical axis direction (ie, the z-axis direction). Can be.
  • the first and second sensing magnets 1250D-1 and 1250D-2 may be spaced apart or in contact with each other in a direction perpendicular to the optical axis direction or in the magnetizing direction (ie, the y-axis direction). have.
  • the anode magnetizing magnet 1250 shown in FIG. 44 is shown to be a magnet having the structure shown in FIG. 45A, but may be replaced with a magnet having the structure shown in FIG. 45B.
  • the nonmagnetic partition 1250C-3 may be disposed between the first and second sensing magnets 1250C-1 and 1250C-2, as shown in FIG. 39B.
  • the adult barrier rib 1250D-3 may be disposed between the first and second sensing magnets 1250D-1 and 1250D-2.
  • the nonmagnetic partitions 1250C-3 and 1250D-3 may include sections having substantially no polarity, and may be filled with air or may include a nonmagnetic material.
  • the third length L3 of the nonmagnetic partition walls 1250C-3 and 1250C-3 is 5% or more of the total total length LT in a direction parallel to the optical axis direction of the anode magnet magnets 1250C and 1250C, or It may be up to 50%.
  • the first position sensor 1260 When the anode magnetizing magnet 1250 and the first position sensor 1260 are disposed as shown in FIG. 44 while the movable unit 1220 is not moved, the first position sensor 1260 The strength of the magnetic field having the sensed first polarity may be '0'.
  • the first side 1252 of the anode magnetizing magnet 1250 may include first sensing magnets 1250A-1 and 1250C-1 facing the first position sensor 1260. It may correspond to the side of.
  • the second side surface 1254 of the anode magnetizing magnet 1250 may include the second sensing magnets 1250A-2 and 1250C-2 facing the first position sensor 1260. It may correspond to the side of).
  • the first and second side surfaces 1252 and 1254 may include first sensing magnets 1250B-1 and 1250D-1 facing the first position sensor 1260. It may correspond to the side of.
  • 46 is a sectional view of a lens driving apparatus 1200D according to still another embodiment.
  • the center 1261 of the first position sensor 1260 moves the first point of the first side surface 1252 in the y-axis direction in the magnetizing direction.
  • the first point may be any point between the upper end 1252a and the lower end 1252b of the first side 1252, for example, an intermediate point of the first side 1252.
  • the anode magnetizing magnet 1250 of the lens driving device 1200D shown in FIG. 46 is farther than the anode magnetizing magnet 1250 of the lens driving device 1200C shown in FIG. 44. It can be located higher by (z2-zh). In this case, referring to FIG. 40, the lowest intensity of the magnetic field having the first polarity detected by the first position sensor 1260 may be B2.
  • the movable unit 1220 may rise to the maximum height z1 like the lens driving apparatus 1200A.
  • the lifting height of the movable portion 1220 can be adjusted by a mechanical stopper.
  • the maximum lifting height of the movable part 1220 may be changed by adjusting the elastic modulus of the lower spring 1230 and the upper spring 1240.
  • the first polarity detected by the first position sensor 1260 may change the intensity of the magnetic field. It can be seen that is almost linear from B2 to B1.
  • the maximum displacement D1 to which the movable part 1220 of the lens driving apparatus 1200D shown in FIG. 46 is movable is z1-z2.
  • the movable part 1220 moves in one direction of the optical axis, that is, in the + z-axis direction from the initial position. Can only be moved.
  • the embodiment is not limited thereto.
  • the lens driving device may move in both directions of the optical axis, that is, the + z-axis direction or the -z-axis direction from the initial position as the current is applied to the first coil. Looking at the configuration and operation of the lens driving apparatus according to the embodiment as follows.
  • 47 is a sectional view of a lens driving apparatus 1200E according to still another embodiment.
  • the lens driving apparatus 1200E illustrated in FIG. 47 may move in the + z axis direction or the ⁇ z axis direction from the initial position. Accordingly, the movable part 1220 may be in the air by the lower and upper springs 1230 and 1240 in the initial position. Except for this, components of the lens driving apparatus 1200E illustrated in FIG. 47 are the same as those of each of the lens driving apparatuses 1200A and 1200B described above, and thus redundant descriptions of the components will be omitted.
  • the center 1261 of the first position sensor 1260 is moved in the magnetizing direction at an initial position before the lens is moved in the optical axis direction, that is, while the movable unit 1220 is stopped without moving.
  • the first point of one side 1252 may be viewed or aligned with the first point.
  • the first point of the first side surface 1252 may be any point between the upper end 1252a and the lower end 1252b of the first side 1252, for example, an intermediate point of the first side 1252.
  • FIG. 48 is a sectional view of a lens driving apparatus 1200F according to still another embodiment.
  • the lens driving apparatus 1200F illustrated in FIG. 48 may move in the + z axis direction or the ⁇ z axis direction. Therefore, the movable part 1220 may be in the air by the lower and upper springs 1230 and 1240 in the initial position. Except for this, components of the lens driving apparatus 1200F illustrated in FIG. 48 are the same as those of each of the lens driving apparatuses 1200C and 1200D described above, and thus redundant descriptions of the components will be omitted.
  • the importance 1261 of the first position sensor 1260 faces the first point of the first side 1252 in the magnetizing direction or the first point. Can be aligned to the point.
  • the first point may be any point between the upper end 1252a and the lower end 1252b of the first side 1252, for example, an intermediate point of the first side 1252.
  • the upward and downward motions of the movable part 1220 may be the same as those of FIG. 40. Therefore, the operation of the lens driving apparatuses 1200E and 2100F illustrated in FIGS. 47 and 48 will be described with reference to FIG. 40.
  • the first position sensor 1260 in an initial state before moving the lens in the optical axis direction, that is, in a state where the movable unit 1220 stops without lifting or lowering, or in an initial position.
  • the positive electrode magnetizing magnet 1250 are arranged as shown in FIGS. 47 and 48, the magnetic field of the first polarity detected by the first position sensor 1260 may be B3.
  • the initial magnetic field value detected by the first position sensor 1260 in the stopped state or the initial position without the movable part 1220 moving up or down may be a distance between the first position sensor 1260 and the positive magnetization magnet 1250. Can be changed or adjusted.
  • FIG. 49 is a graph illustrating a displacement of the movable part 1220 according to the current supplied to the first coil in the lens driving apparatuses 1200E and 1200F of FIGS. 47 and 48, and the horizontal axis represents the current supplied to the first coil.
  • the vertical axis represents the displacement.
  • the right side of the horizontal axis may mean a constant current or a forward current or + current based on the vertical axis, and the left side of the horizontal axis may mean a reverse current or a reverse current or a-current.
  • the movable part 1220 increases the strength of the reverse current applied to the first coil or moves in the + z-axis direction, and then moves the first to When the constant current supplied to the coil is reduced, the movable part 1220 may move downward.
  • the intensity of the reverse current applied to the first coil when the intensity of the reverse current applied to the first coil is increased at the initial position, the intensity of the magnetic field detected by the first position sensor 1260 may decrease from B3 to B5.
  • the intensity of the magnetic field having the first polarity detected by the first position sensor 1260 of the lens driving apparatus 1200E or 1200F illustrated in FIG. 47 or 48 varies almost linearly between B5 and B4. Can be.
  • the upper displacement width D3 and the lower displacement width D2 of the movable part 1220 may be the same, and the upper displacement width ( D3) may be larger than the lower displacement width D2.
  • the height z of the center 1261 of the first position sensor 1260 in the initial state before the lens is moved in the optical axis direction. zh) may coincide with the first point described above in the y-axis direction, which is the magnetization direction.
  • the center 1261 of the first position sensor 1260 is in an initial state or an initial position before the lens is moved in the optical axis direction.
  • the second point higher than the above-described first point in the y-axis direction, which is the magnetization direction, may be viewed or aligned with the second point. That is, when the upper displacement width D3 is greater than the lower displacement width D2 than when the upper displacement width D3 is the same as the lower displacement width D2, the first position sensor 1260 with respect to the positive electrode magnetizing magnet 1250. ) May be relatively higher.
  • Equation 1 the difference between the second point and the first point may be as shown in Equation 1 below.
  • H2 is the height of the second point
  • H1 is the height of the first point
  • ⁇ D is a value obtained by subtracting the lower displacement width D2 from the upper displacement width D3 of the movable portion 1220
  • D is the movable portion ( It may mean the total displacement width (D2 + D3) of 1220.
  • the 50 illustrates the intensity of the magnetic field (or output voltage) detected by the first position sensor 1260 according to the moving distance of the movable part 1220 in the optical axis direction. 1, 1250-2), the vertical axis represents the intensity of the magnetic field (or output voltage), and the horizontal axis represents the moving distance of the movable part 220 in the optical axis direction.
  • the structure of the anode magnetizing magnet 1250 facing the first position sensor 1260 may include the first and second sensing magnets 1250A-1 and 1250A-2 shown in FIG. 39A.
  • the first and second sensing magnets 1250B-1 and 1250B-2 shown in FIG. 39B or FIG. The first and second sensing magnets 1250C-1 and 1250C-2 shown in 46a or the first and second sensing magnets 1250D-1 and 1250D-2 shown in FIG. Even when disposed facing 1260, the following description of FIG. 50 may be applied.
  • the magnetic field sensed by the first position sensor 1260 and having a linearly varying intensity may be a magnetic field 1272 of the first polarity, for example, the S pole.
  • the embodiment is not limited thereto. That is, according to another embodiment, the magnetic field detected by the first position sensor 1260 and having a linearly varying intensity may be a magnetic field 1274 of the second polarity, for example, the N pole.
  • the lens may be moved in the optical axis direction.
  • the center 1261 of the first position sensor 1260 may look at or aligned with the first point of the second side 1254. .
  • the first point may be a height between an upper end portion and a lower end portion of the second side surface 1254, for example, the middle of the second side surface 1254. Then, when the lens is moved highest in the optical axis + z axis direction, the center 1261 of the first position sensor 1260 may coincide with a point lower than the lower end of the second side surface 1254, where the first The height of the center 1261 of the first position sensor 1260 may be lower than the height of the lower end of the second side surface 1254.
  • first section BP1 in which the magnetic pole 1762 of the S pole is linear is larger than the second section BP2 in which the magnetic field 1756 of the N pole is linear. This is because the first length L1 of the first side surface 1252 having S polarity is longer than the second length L2 of the second side surface 1254 having N polarity.
  • first side surface 1252 having the first length L1 longer than the second length L2 has the N polarity
  • second side surface 1254 having the second length L2 has the S polarity
  • reference numeral 1272 illustrated in FIG. 50 may correspond to a magnetic field of N polarity
  • 1274 may correspond to a magnetic field of S polarity.
  • the polarity of the Y axis may be reversed if the pole is changed as described above.
  • 51A and 51B are graphs showing displacements of intensity of the magnetic field detected by the first position sensor 1260, in which the horizontal axis represents a magnetic field and the vertical axis represents a displacement.
  • first position sensor 1260 and the positive magnetization magnet 1250 are disposed to detect the magnetic field of the first section BP1 having a linear section larger than the second section BP2 illustrated in FIG. 50.
  • the displacement may be recognized even when the detected change in the magnetic field is minute.
  • the position sensor 1260 and the positive magnetization magnet 1250 may be connected to detect the magnetic field of the second section BP2 having a linear section smaller than the first section BP1 shown in FIG. 50.
  • the degree of recognition of the minute displacement is smaller than that of FIG. 51A. That is, the inclination of FIG. 51A and FIG. 51B may be different from each other.
  • the position sensor 1260 and the quantum magnetized magnet 1250 may be disposed such that the position sensor 1260 detects the magnetic field of the first section BP1 larger than the second section BP2.
  • displacement can be detected at much higher resolution. That is, the wider the linear section in which the intensity of the magnetic field changes, the more accurately the change in displacement with respect to the encoded magnetic field can be checked.
  • the intensity of the magnetic field sensed by the position sensor 1260 and having a linearly varying magnitude may be coded into 7 to 12 bits.
  • the controller (not shown) may include a look-up table (not shown) to precisely control the displacement of the movable unit 1220 through the position sensor 1260.
  • the strength-specific code values of the magnetic field may be matched with the displacement and stored.
  • the intensity of the magnetic field from the minimum magnetic field B0 to the maximum magnetic field B1 may be encoded into 7 to 12 bits by matching the displacement z. Therefore, when the displacement of the movable part 1220 is to be controlled, the corresponding code value is found, and the controller may move the movable part 1220 in the optical axis direction to a position matching the found code value.
  • the controller may be disposed or included in the image sensor, or may be disposed or included in a circuit board on which the image sensor is mounted.
  • the length LT in the z-axis direction parallel to the optical axis direction of the anode magnetizing magnet 250 is 1.5 times the movable width of the movable part 1220, that is, the maximum displacement. It may be abnormal.
  • the maximum displacement which is the movable width of the movable part 1220, is z1
  • the length LT of the positive electrode magnetizing magnet 1250 may be 1.5 ⁇ z1 or more.
  • the position sensor 1260 is coupled, contacted, supported, temporarily fixed, inserted or seated to the fixing unit 1210, and the anode magnet magnet 1250 is mounted to the movable unit 1220.
  • the case where the coupling, the contact, the support, the fixing, the temporary fixing, the insertion or the seating has been described as an example, but the embodiment is not limited thereto.
  • the position sensor 1260 is coupled, contacted, supported, temporarily fixed, inserted or seated in the movable part 1220, and the positive electrode magnetizing magnet 1250 is coupled, contacted, or seated to the fixed part 1210. It may be supported, fixed, temporarily fixed, inserted or seated, in which case the above description may apply.
  • FIG 52 is a graph for explaining the change in intensity of the magnetic field according to the moving distance of the movable part 1220 of the lens driving apparatus of the comparative example, wherein the horizontal axis represents the moving distance and the vertical axis represents the strength of the magnetic field.
  • the movable part 1220 moves.
  • the change in the magnetic field detected by the position sensor 1260 may be as shown in FIG. 52.
  • the magnetic field detected by the position sensor 1260 is reversed in polarity with respect to a mutual zone (MZ).
  • the mutual area MZ is an area in which the intensity of the magnetic field detected by the position sensor 1260 is fixed to '0' despite the movement of the movable part 1220.
  • Such a mutual area MZ may not be processed in software. Therefore, the position sensor 1260 can not only detect the strength of the magnetic field as '0' in the mutual area MZ, but can accurately measure and control the moving distance of the movable part 1220 moving in this section MZ. none.
  • the first length L1 of the anode magnet magnet 1250 is formed longer than the second length L2, and the position sensor 1260 senses the strength of the magnetic field of the first polarity that is linearly changed.
  • the same problem as in the comparative example described above can be prevented in advance. For this reason, the design margin and reliability of the lens drive apparatus 1200A-1200F can be improved.
  • FIG. 53 is a graph illustrating a change in a magnetic field detected by the position sensor 1260 according to the movement of the movable unit 1220 in the lens driving apparatus according to the embodiment, wherein the horizontal axis represents a moving distance and the vertical axis represents a magnetic field.
  • the intensity change of the magnetic field 1282 of the first polarity and the magnetic field 1284 of the second polarity may vary substantially linearly. Therefore, since the position sensor 1260 can detect both the magnetic field 1282 of the first polarity and the magnetic field 1284 of the second polarity that change linearly with the movement of the movable part 1220, the first and second The magnetic field having a linearly varying intensity having only one polarity of polarity may have a relatively higher resolution than when the position sensor 1260 senses.
  • the third length L3 of the nonmagnetic partitions 1250A-1 and 1250C-1 is 10% or more of the total length LT of the anode magnet magnet 1250, the mutual area MZ of the magnetic field and The linear intervals are clearly separated so that the position sensor 1260 can detect only a magnetic field having one of the first and second polarities and having a linearly varying intensity.
  • It can be miniaturized, can be freely corrected in the image, and is used in a lens driving device that can accurately locate a lens.

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PCT/KR2015/006343 2014-07-03 2015-06-23 렌즈 구동 장치 Ceased WO2016003103A1 (ko)

Priority Applications (8)

Application Number Priority Date Filing Date Title
CN201911392732.9A CN111399247B (zh) 2014-07-03 2015-06-23 透镜驱动装置
CN201580041240.9A CN106575025B (zh) 2014-07-03 2015-06-23 透镜驱动装置
CN201911392720.6A CN111399246B (zh) 2014-07-03 2015-06-23 透镜驱动装置
JP2016575732A JP6669677B2 (ja) 2014-07-03 2015-06-23 レンズ駆動装置
US15/321,940 US10042140B2 (en) 2014-07-03 2015-06-23 Lens driving device
US16/025,327 US11131830B2 (en) 2014-07-03 2018-07-02 Lens driving device
US17/445,052 US11726296B2 (en) 2014-07-03 2021-08-13 Lens driving device
US18/344,156 US12298589B2 (en) 2014-07-03 2023-06-29 Lens driving device

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CN109143526B (zh) * 2017-06-19 2022-04-08 三美电机株式会社 透镜驱动装置、摄像机模块及摄像机搭载装置
JP2019003146A (ja) * 2017-06-19 2019-01-10 ミツミ電機株式会社 レンズ駆動装置、カメラモジュール、及びカメラ搭載装置
KR102707875B1 (ko) * 2017-06-19 2024-09-23 미쓰미덴기가부시기가이샤 렌즈 구동장치, 카메라 모듈, 및 카메라 탑재 장치
KR102712486B1 (ko) * 2017-06-19 2024-10-04 미쓰미덴기가부시기가이샤 렌즈 구동장치, 카메라 모듈, 및 카메라 탑재 장치
CN109143526A (zh) * 2017-06-19 2019-01-04 三美电机株式会社 透镜驱动装置、摄像机模块及摄像机搭载装置
KR20180138145A (ko) * 2017-06-19 2018-12-28 미쓰미덴기가부시기가이샤 렌즈 구동장치, 카메라 모듈, 및 카메라 탑재 장치
KR20180138146A (ko) * 2017-06-19 2018-12-28 미쓰미덴기가부시기가이샤 렌즈 구동장치, 카메라 모듈, 및 카메라 탑재 장치

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US20230341655A1 (en) 2023-10-26
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