Lens drive device, camera module and optical device

Abstract

This embodiment relates to a lens driving device that includes a fixed portion; a mover that is arranged to move relative to the fixed portion and includes a housing and a holder; and a driving portion for moving the mover, wherein the driving portion includes a first driving portion that moves the holder and a second driving portion that moves the housing, and at least a portion of the first driving portion and at least a portion of the second driving portion are arranged on a first side of the fixed portion.

Description

[Technical Field]

[0001] The present embodiment relates to a lens driving device, a camera module, and an optical device. [Background technology]

[0002] As various types of mobile terminals have become widespread and wireless Internet services have become commonplace, consumer demands regarding mobile terminals have become more diverse, and various types of add-on devices are being installed on mobile terminals.

[0003] A typical example is a camera module that takes photos or videos of a subject. Recently, camera modules have been equipped with an autofocus function that automatically adjusts the focus according to the distance of the subject. They also have an image stabilization function that corrects camera shake caused by the user's hand.

[0004] However, in the case of a spring-type module, since the elastic force of the spring acts, a current must be continuously applied to move the lens to a desired position, which increases current consumption.

[0005] In addition, with the increasing trend towards the adoption of high-pixel image sensors, the weight and size of lenses are also increasing, and in the case of conventional spring or suspension wire methods, the increased weight of the drive unit is a risk factor in terms of performance and reliability. Summary of the Invention [Problem to be solved by the invention]

[0006] This embodiment aims to provide a ball type lens driving device that can reduce current consumption compared to a spring type.

[0007] Another object of the present invention is to provide a lens driving device that can employ a lens with a large diameter. [Means for solving the problem]

[0008] The lens driving device of this embodiment includes a fixed part; a mover arranged to move relative to the fixed part and including a housing and a holder; and a driving part for moving the mover; the driving part includes a first driving part for moving the holder and a second driving part for moving the housing, and at least a portion of the first driving part and at least a portion of the second driving part can be arranged on a first side of the fixed part.

[0009] The first driving unit may include a first coil and a first magnet, and the second driving unit may include a second coil and a second magnet.

[0010] The first coil and the second coil may be disposed on the first side surface of the fixed portion.

[0011] The first magnet and the second magnet may be disposed on the first side surface of the fixing part.

[0012] The fixing part may include a base and a substrate disposed on the base, the base having first to fourth sides, and the substrate may include a first portion disposed on the first side of the base.

[0013] The first coil can move the holder in a direction perpendicular to the optical axis direction, and the second coil can move the holder and the housing in the optical axis direction.

[0014] The second side of the base may be disposed opposite the first side of the base, the substrate may include a second portion disposed on the second side of the base, and each of the first coil and the second coil may include a coil disposed on the second portion of the substrate.

[0015] The third side of the base may be disposed opposite the fourth side of the base, the substrate may include a third portion disposed on the third side of the base and a fourth portion disposed on the fourth side of the base, and the second coil may not be disposed on the third portion or the fourth portion of the substrate.

[0016] The first coil may include a coil disposed in the third portion and the fourth portion of the substrate.

[0017] The first magnet may include four magnets arranged on four sides of the holder, and the second magnet may include two magnets arranged on two sides of the housing that are opposite each other.

[0018] The lens driving device may include a first ball that contacts the holder and the housing, and the first ball may be disposed on an upper surface of the holder.

[0019] The lens driving device may include a first yoke disposed on an upper surface of the housing, and the first yoke may overlap the first magnet and the first ball in the optical axis direction.

[0020] The first ball may include four balls, and an imaginary plane connecting the centers of the four balls may be perpendicular to the optical axis direction.

[0021] The housing may include a second ball in contact with the base, and the second ball may include two balls arranged symmetrically with respect to the optical axis.

[0022] The optical element may include a second yoke disposed on the substrate, the second yoke overlapping the second magnet in a direction perpendicular to the optical axis direction.

[0023] The first magnet may include a magnet facing the first coil disposed on the first portion of the substrate, and the second magnet may include a magnet facing the second coil disposed on the first portion of the substrate.

[0024] The base may include two protruding portions formed on the third side surface of the base and spaced apart from each other in the optical axis direction, and the third portion of the substrate may include a first region in which the first coil is disposed and a second region extending from the first region and disposed between the two protruding portions of the base, and a length of the first region of the substrate may be longer than a length of the second region of the substrate in the optical axis direction.

[0025] The lens driving device may include a driver IC including a Hall element that senses the second magnet, disposed on the first portion of the substrate, and electrically connected to the second coil.

[0026] The lens driving device may include a Hall sensor disposed on the substrate and detecting the first magnet, and the Hall sensor may include a first Hall sensor detecting movement of the holder in a first direction perpendicular to the optical axis direction, and a second Hall sensor detecting movement of the holder in a second direction perpendicular to the optical axis direction and the first direction.

[0027] The substrate includes a plurality of terminals, and the plurality of terminals of the substrate may include four terminals electrically connected to the driver IC, two terminals electrically connected to coils in the first coil arranged on an imaginary first plane, two terminals electrically connected to coils in the first coil arranged on an imaginary second plane perpendicular to the first plane, four terminals electrically connected to the first Hall sensor, and four terminals electrically connected to the second Hall sensor.

[0028] The lens driving device may include a cover member including an upper plate and a side plate extending from the upper plate and covering the base, and the side plate of the cover member may be coupled to the base.

[0029] The camera module of this embodiment may include a printed circuit board; an image sensor arranged on the printed circuit board; a lens driving device arranged on the printed circuit board; and a lens coupled to the holder of the lens driving device.

[0030] The optical device according to this embodiment may include: a book; the camera module disposed on the main body; and a display disposed on the main body, which outputs one or more of an image and a video captured by the camera module.

[0031] The lens driving device of this embodiment includes a base including first to fourth sides; a housing that moves vertically relative to the base; a holder that moves horizontally relative to the housing; a first driving unit for moving the housing; and a second driving unit for moving the holder; wherein a portion of the first driving unit is arranged on the first side and the third side facing each other, and the second driving unit includes a first unit driving unit partially arranged on the first side and a second unit driving unit partially arranged on the fourth side, and the first unit driving unit and the second unit driving unit can move the holder in different directions from each other.

[0032] Another portion of the first unit driver may be disposed on the third side opposite the first side, and another portion of the second unit driver may be disposed on the second side opposite the fourth side.

[0033] The first unit drivers disposed on the first and third sides may be first unit coils.

[0034] There may be at least two first unit coils, one of which may be disposed on the first side surface and the other of which may be disposed on the third side surface.

[0035] The magnet includes first unit magnets arranged to correspond to the first unit coils, and the first unit magnets may be at least two in number and may be coupled to the holder.

[0036] The first driving portion disposed on the first side surface and the third side surface may be a first coil.

[0037] The first driving unit may include a first magnet coupled to the housing in correspondence with the first coil.

[0038] The lens driving device of this embodiment includes a base including first to fourth sides; a housing that moves vertically relative to the base; a holder that moves horizontally relative to the housing; and a driving unit for moving the holder. The driving unit includes a first unit driving unit including a first unit coil or a first unit magnet arranged on the first side, and a second unit driving unit including a second unit coil or a second unit magnet arranged on the fourth side. The first unit driving unit and the second unit driving unit move the holder in different directions. The base includes a first corner where the first side and the fourth side meet and a fourth corner where the third side and the fourth side meet. There are multiple first unit coils and multiple second unit coils, and one first unit coil and one second unit coil among the multiple coils may be arranged closer to the first corner than the fourth corner.

[0039] The base may include a third corner diagonally opposite to the first corner, and another first unit coil and another second unit coil among the plurality of coils may be disposed closer to the third corner than the fourth corner.

[0040] The lens driving device of this embodiment includes a fixed part; a mover arranged to move relative to the fixed part and including a housing and a holder; a driving part for moving the mover; and a guide part arranged between the housing and the holder; the driving part includes a first driving part for moving the housing and a second driving part for moving the holder, and the guide part includes a retainer including first and second balls, a first hole in which the first ball is accommodated, and a second hole in which the second ball is accommodated, and the first ball can rotate within the first hole, and the second ball can rotate within the second hole.

[0041] The second driving unit may include a first unit driving unit that drives the holder in a first direction using the first ball and the second ball, and a second unit driving unit that drives the holder in a second direction different from the first direction using the first ball and the second ball.

[0042] The first ball and the second ball may be spaced apart by the first hole and the second hole.

[0043] The distance between the first ball and the second ball may be greater than or equal to the distance between the first hole and the second hole.

[0044] The lens driving device of this embodiment includes a base; a housing arranged in the base; a holder arranged in the housing; and a guide portion arranged between the holder and the housing; the guide portion includes a retainer including a hole and a ball arranged in the hole, and the guide portion can be arranged to overlap with the holder and the housing in the optical axis direction.

[0045] The lens driving device of this embodiment includes a base; a housing arranged to move in the optical axis direction; a holder arranged to move in a direction perpendicular to the optical axis direction; and a guide portion arranged between the holder and the housing, and the guide portion can include a retainer and a ball arranged in the retainer.

[0046] The retainer is coupled to the holder or the housing, and the ball can move or roll in the direction perpendicular to the optical axis direction.

[0047] The retainer can function as a yoke. The holder may include a magnet disposed thereon, and an attractive force may act between the retainer and the magnet.

[0048] The lens driving device of this embodiment includes a base; a housing arranged in the base; a holder arranged in the housing; a first magnet arranged in the holder; a second magnet arranged in the housing; a substrate arranged on the base; a first coil arranged on the substrate and facing the first magnet; a second coil arranged on the substrate and facing the second magnet; a first ball in contact with the holder and the housing; and a first yoke fixed to the housing and overlapping with the first magnet in the optical axis direction; and the first yoke may include a hole in which the first ball is arranged.

[0049] The diameter of the hole of the first yoke may be formed to correspond to or be larger than the diameter of the first ball.

[0050] The first ball may be rotatably disposed in the hole of the first yoke.

[0051] The first yoke may include two side plates having upper ends fixed to the housing and a connecting plate connecting the two side plates, and the holes of the first yoke may be formed in the connecting plate.

[0052] The connecting plate of the first yoke may overlap the center of the first ball in a direction perpendicular to the optical axis direction.

[0053] The holder includes a first side and a second side arranged opposite to each other, and a third side and a fourth side arranged opposite to each other, the first magnet includes a 1-1 magnet arranged on the first side of the holder, a 1-2 magnet arranged on the second side of the holder, a 1-3 magnet arranged on the third side of the holder, and a 1-4 magnet arranged on the fourth side of the holder, and the first yoke includes a 1-1 yoke overlapping with the 1-1 magnet in the optical axis direction, a 1-2 yoke overlapping with the 1-2 magnet in the optical axis direction, a 1-3 yoke overlapping with the 1-3 magnet in the optical axis direction, and a 1-4 yoke overlapping with the 1-4 magnet in the optical axis direction.

[0054] The holes of the first yoke may be formed in threes at equal intervals in each of the 1-1 to 1-4 yokes.

[0055] The housing may include an upper plate and a side plate extending downward from the upper plate, and the first ball may be disposed between the upper plate of the housing and an upper surface of the holder.

[0056] The first yoke may be fixed to a lower surface of the upper plate of the housing, and the first yoke may be disposed closer to one of two corner regions of the upper surface of the holder.

[0057] The holder may include a protrusion protruding from a side surface of the holder and a groove formed in the protrusion, and the first magnet may be disposed in the groove of the holder.

[0058] The housing may include a groove formed on an inner surface of the side plate of the housing, and at least a portion of the protrusion of the holder may be disposed in the groove of the housing.

[0059] The side plate of the housing may include a first portion of the housing in which the groove is formed and a second portion of the housing in which the groove is not formed, and the second magnet may be disposed in the second portion of the housing.

[0060] The first yoke may be made of a magnetic material. The base may include first to fourth sides, the substrate may include a first portion disposed on the first side of the base, and each of the first coil and the second coil may include a coil disposed on the first portion of the substrate.

[0061] The first coil can move the holder in a direction perpendicular to the optical axis direction, and the second coil can move the holder and the housing in the optical axis direction.

[0062] The second side of the base may be disposed opposite the first side of the base, the substrate may include a second portion disposed on the second side of the base, and each of the first coil and the second coil may include a coil disposed on the second portion of the substrate.

[0063] The third side of the base is disposed opposite the fourth side of the base, the substrate includes a third portion disposed on the third side of the base and a fourth portion disposed on the fourth side of the base, the second coil is not disposed on the third portion or the fourth portion of the substrate, and the first coil may include a coil disposed on the third portion and the fourth portion of the substrate.

[0064] The camera module of this embodiment may include a printed circuit board; an image sensor arranged on the printed circuit board; a lens driving device arranged on the printed circuit board; and a lens coupled to the holder of the lens driving device.

[0065] The optical device according to this embodiment may include a main body; a camera module disposed on the main body; and a display disposed on the main body for outputting one or more of an image and a video captured by the camera module.

[0066] The lens driving device of this embodiment includes a base; a housing arranged in the base; a holder arranged in the housing; a first magnet arranged in the holder; a second magnet arranged in the housing; a substrate arranged on the base; a first coil arranged on the substrate and facing the first magnet; a second coil arranged on the substrate and facing the second magnet; a first ball in contact with the holder and the housing; and a first yoke fixed to the housing and overlapping with the first magnet in the optical axis direction; the housing includes an upper plate and side plates extending from the upper plate, the first ball is arranged between the upper plate of the housing and the upper surface of the holder, and the first yoke can be fixed to the upper plate of the housing. [Effects of the Invention]

[0067] This embodiment can reduce the current consumed during autofocus driving and image stabilization driving compared to the spring type.

[0068] Furthermore, autofocus and image stabilization drives may be possible without risk to performance and reliability even when large diameter lenses are employed. [Brief explanation of the drawings]

[0069] [Figure 1] FIG. 1 is a perspective view of a lens driving device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3] FIG. 2 is a cross-sectional view taken along the line BB in FIG. [Figure 4] FIG. 2 is a cross-sectional view taken along CC in FIG. [Figure 5] FIG. 2 is a cross-sectional view taken along the line DD in FIG. [Figure 6] FIG. 2 is an exploded perspective view of the lens driving device according to the embodiment. [Figure 7] FIG. 2 is a perspective view of a partial configuration of the lens driving device according to the embodiment. [Figure 8] FIG. 8 is an enlarged view of a partial area of FIG. [Figure 9] FIG. 2 is a perspective view of a second mover of the lens driving device according to the present embodiment. [Figure 10] FIG. 10 is a perspective view illustrating a state in which a first ball is placed in FIG. 9. [Figure 11] FIG. 2 is a bottom view of the housing of the lens driving device according to the embodiment. [Figure 12] FIG. 2 is a perspective view of a housing of the lens driving device according to the embodiment. [Figure 13] FIG. 2 is a perspective view of a first mover of the lens driving device according to the present embodiment. [Figure 14] FIG. 2 is a perspective view of a first base of the lens driving device according to the present embodiment. [Figure 15] 1 is a perspective view illustrating an arrangement structure of a substrate and first and second coils of a lens driving device according to the present embodiment. [Figure 16] FIG. 16 is a perspective view of FIG. 15 seen from a different direction. [Figure 17] 3 is a perspective view illustrating a second ball and related configuration of the lens driving device according to the present embodiment. FIG. [Figure 18] 1 is a cross-sectional view of a partial configuration of a lens driving device according to an embodiment of the present invention. [Figure 19] 10 is a perspective view illustrating the lens driving device according to the embodiment in which a cover member is omitted. FIG. [Figure 20] 10 is a perspective view illustrating the lens driving device according to the embodiment in which a cover member is omitted. FIG. [Figure 21] FIG. 20 is a perspective view of FIG. 19 viewed from above. [Figure 22] 4 is a diagram for explaining AF and OIS driving of the lens driving device according to the embodiment. [Figure 23] FIG. 10 is an exploded perspective view of a lens driving device according to a modified example. [Figure 24] FIG. 10 is a perspective view of a partial configuration of a lens driving device according to a modified example. [Figure 25] FIG. 25 is an enlarged view of a portion of FIG. 24. [Figure 26] FIG. 10 is a perspective view of a partial configuration of a lens driving device according to a modified example. [Figure 27] FIG. 2 is an exploded perspective view of the camera module according to the embodiment. [Figure 28] FIG. 1 is a perspective view of an optical device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0070] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0071] However, the technical concept of the present invention is not limited to the described embodiments, but can be embodied in various different forms, and one or more of the components of the embodiments can be selectively combined or substituted within the scope of the technical concept of the present invention.

[0072] Furthermore, unless otherwise clearly defined and described, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as meanings that are commonly understood by a person of ordinary skill in the art to which the present invention belongs, and commonly used terms such as predefined terms should be interpreted in light of the contextual meaning of the relevant art.

[0073] Furthermore, the terms used in the embodiments of the present invention are intended to explain the embodiments and are not intended to limit the present invention.

[0074] In this specification, unless otherwise specified, the singular can also include the plural, and when it is stated as "A and (and) at least one (or more) of B and C," it can include one or more of all possible combinations of A, B, and C.

[0075] Furthermore, when describing components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. are used only to distinguish the component from other components, and the terms do not limit the nature, order, or sequence of the components.

[0076] Furthermore, when a component is described as being 'coupled', 'coupled', or 'connected' to another component, this includes not only when the component is directly 'coupled', 'coupled', or 'connected' to the other component, but also when the component is 'coupled', 'coupled', or 'connected' by another component between the component and the other component.

[0077] Furthermore, when described as being formed or disposed "above" or "below" each component, "above" or "below" includes not only the case where two components are in direct contact with each other, but also the case where one or more additional components are formed or disposed between the two components. Furthermore, when described as "above" or "below," it can include not only the meaning of an upper direction but also the meaning of a lower direction based on one component.

[0078] The term "optical axis direction" used below is defined as the optical axis direction of a lens and / or an image sensor coupled to a lens driving device.

[0079] The 'vertical direction' used below may be a direction parallel to the optical axis direction. The vertical direction may correspond to the 'z-axis direction'. The 'horizontal direction' used below may be a direction perpendicular to the vertical direction. That is, the horizontal direction may be a direction perpendicular to the optical axis. Therefore, the horizontal direction may include the 'x-axis direction' and the 'y-axis direction'.

[0080] The 'autofocus function' used below is defined as a function that automatically focuses on a subject by adjusting the distance to the image sensor by moving the lens along the optical axis according to the distance to the subject so that a clear image of the subject can be obtained on the image sensor. On the other hand, 'autofocus' can correspond to 'AF (Auto Focus)'.

[0081] The term "image stabilization" used below is defined as a function that moves or tilts the lens in a direction perpendicular to the optical axis to offset vibrations (movements) that occur in the image sensor due to external forces. "Image stabilization" can also be used interchangeably with "OIS (Optical Image Stabilization)" or "Optical Image Stabilization."

[0082] The lens driving device according to this embodiment will be described below with reference to the drawings.

[0083] 1 is a perspective view of the lens driving device according to this embodiment, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, FIG. 3 is a cross-sectional view taken along line BB in FIG. 1, FIG. 4 is a cross-sectional view taken along line CC in FIG. 1, FIG. 5 is a cross-sectional view taken along line DD in FIG. 1, FIG. 6 is an exploded perspective view of the lens driving device according to this embodiment, FIG. 7 is a perspective view of a portion of the lens driving device according to this embodiment, FIG. 8 is an enlarged view of a portion of FIG. 7, FIG. 9 is a perspective view of a second movable element of the lens driving device according to this embodiment, FIG. 10 is a perspective view illustrating a state in which a first ball is arranged in FIG. 9, FIG. 11 is a bottom view of a housing of the lens driving device according to this embodiment, FIG. 12 is a perspective view of the housing of the lens driving device according to this embodiment, and FIG. 14 is a perspective view of the first base of the lens driving device according to this embodiment; FIG. 15 is a perspective view illustrating the arrangement of the substrate and the first and second coils of the lens driving device according to this embodiment; FIG. 16 is a perspective view of FIG. 15 from a different direction; FIG. 17 is a perspective view illustrating the second ball and related configuration of the lens driving device according to this embodiment; FIG. 18 is a cross-sectional view of a portion of the configuration of the lens driving device according to this embodiment; FIGS. 19 and 20 are perspective views illustrating the lens driving device according to this embodiment with the cover member omitted; FIG. 21 is a perspective view of FIG. 19 viewed from above; and FIG. 22 is a drawing for explaining the AF and OIS drive of the lens driving device according to this embodiment.

[0084] The lens driving device 10 may include a stator 100. The stator 100 may move the first mover 200 and the second mover 300. The stator 100 may accommodate the first mover 200 and the second mover 300 therein. The stator 100 may be a part that is fixed relative to the first mover 200 and the second mover 300 when they move. The stator 100 may be a fixed part.

[0085] The lens driving device 10 may include a base. The base may include a first base 110 and a second base 160. The first base 110 may be a side base plate, and the second base 160 may be a lower base plate. The base may include four side surfaces. The base may include first to fourth side surfaces.

[0086] The stator 100 may include a first base 110. The first base 110 may be disposed outside the housing 210. The first coil 130 and the second coil 140 may be disposed on the first base 110. The first base 110 may be disposed on the second base 160.

[0087] The first base 110 may include a plurality of sides. The first base 110 may include first to fourth sides. The second side of the first base 110 may be disposed opposite the first side of the first base 110. The third side of the first base 110 may be disposed opposite the fourth side of the first base 110. In this case, the first to fourth sides of the first base 110 may be the first to fourth sides of the base.

[0088] The first base 110 may include a protrusion 111. The protrusion 111 may be formed to protrude from a third side surface of the first base 110. The protrusion 111 may be formed to protrude from a fourth side surface of the first base 110. The protrusion 111 may include two protrusions spaced apart from each other in the optical axis direction. The protrusions 111 may be formed at upper and lower ends of the side surfaces of the first base 110. The substrate 120 may be disposed between the two protrusions. The distance between the two protrusions may correspond to the length of the substrate 120 in the corresponding direction.

[0089] The first base 110 may include a first hole 112. The first hole 112 may be hollow. The housing 210 may be disposed in the first hole 112. The first hole 112 may penetrate the first base 110 in the optical axis direction.

[0090] The first base 110 may include a second hole 113. The second hole 113 may be formed at a position corresponding to the second coil 140. The second coil 140 may be disposed in the second hole 113. The second hole 113 may be formed at a position corresponding to the second magnet 220. The second hole 113 may penetrate the first base 110 in a direction perpendicular to the optical axis direction.

[0091] The first base 110 may include a third hole 114. The third hole 114 may be formed at a position corresponding to the 1-1 coil 131 and the 1-3 coil 133. The 1-1 coil 131 and the 1-3 coil 133 may be disposed in the third hole 114. The third hole 114 may be formed at a position corresponding to the 1-1 magnet 321. The third hole 114 may penetrate the first base 110 in a direction perpendicular to the optical axis direction.

[0092] The first base 110 may include a fourth hole 115. The fourth hole 115 may be formed at a position corresponding to the first-second coil 132 and the first-fourth coil 134. The first-second coil 132 and the first-fourth coil 134 may be disposed in the fourth hole 115. The fourth hole 115 may be formed at a position corresponding to the first-second magnet 322. The fourth hole 115 may penetrate the first base 110 in a direction perpendicular to the optical axis direction.

[0093] The second base 160 may be disposed below the holder 310. The second base 160 may be disposed below the first base 110. The second base 160 may be disposed below the holder 310. The second base 160 may be in contact with the housing 210. The second base 160 may be formed with a lower stopper that limits the downward movement of the housing 210. The housing 210 may be formed with a lower stopper that contacts the second base 160 to limit the downward movement of the housing 210. The lower stopper may be formed on one or more of the housing 210 and the second base 160.

[0094] The lens driver 10 may include a substrate 120. The stator 100 may include the substrate 120. The substrate 120 may be disposed on a base. The substrate 120 may be a flexible printed circuit board (FPCB). The substrate 120 may be flexible. The substrate 120 may be integrally formed and bendable. The substrate 120 may be disposed to wrap around the outer periphery of the base. A first coil 130 and a second coil 140 may be disposed on the substrate 120. The substrate 120 may be electrically connected to the first coil 130 and the second coil 140. The substrate 120 may supply current to the first coil 130 and the second coil 140.

[0095] The substrate 120 may include multiple portions. The substrate 120 may include multiple portions corresponding to multiple side surfaces of the first base 110. The substrate 120 may include first to fourth portions 121, 122, 123, and 124. The substrate 120 may include a first portion 121 disposed on a first side surface of the base. The substrate 120 may include a second portion 122 disposed on a second side surface of the base. The substrate 120 may include a third portion 123 disposed on a third side surface of the base. The substrate 120 may include a fourth portion 124 disposed on a fourth side surface of the base.

[0096] The third portion 123 of the substrate 120 may include a first region 123-1 and a second region 123-2. The third portion 123 of the substrate 120 may include the first region 123-1 in which the first coil 130 is disposed, and the second region 123-2 extending from the first region 123-1 and disposed between the two protrusions 111 of the first base 110. In the optical axis direction, the length of the first region 123-1 of the substrate 120 (see L1 in FIG. 16 ) may be longer than the length of the second region 123-2 of the substrate 120 (see L2 in FIG. 16 ).

[0097] The fourth portion 124 of the substrate 120 may include a first region 124-1 and a second region 124-2. The fourth portion 124 of the substrate 120 may include the first region 124-1 in which the first coil 130 is disposed, and the second region 124-2 extending from the first region 124-1 and disposed between the two protrusions 111 of the first base 110. In the optical axis direction, the length of the first region 124-1 of the substrate 120 may be longer than the length of the second region 124-2 of the substrate 120.

[0098] In this embodiment, the first coil 130 and the second coil 140 may be disposed together in the first portion 121 of the substrate 120. In this case, the first coil 130 may be disposed beside the second coil 140. The first coil 130 may be disposed biased to one side of the first portion 120 of the substrate 120, and the second coil 140 may be disposed biased to the other side of the first portion 120 of the substrate 120. Furthermore, the first coil 130 and the second coil 140 may be disposed together in the third portion 123 of the substrate 120. Only the first coil 130 may be disposed in the second portion 122 and the fourth portion 124 of the substrate 120. The first coil 130 and the second coil 140 may be formed to have different sizes. The first coil 130 and the second coil 140 may have different numbers of windings. Alternatively, the first coil 130 and the second coil 140 may be formed to have the same size because they have the same number of windings.

[0099] The substrate 120 may include a plurality of terminals. The substrate 120 may include 16 terminals. The plurality of terminals of the substrate 120 may include four terminals electrically connected to the driver IC 510. The plurality of terminals of the substrate 120 may include two terminals electrically connected to the coils of the first coil 130 arranged on an imaginary first plane. That is, the plurality of terminals of the substrate 120 may include two terminals electrically connected to the 1-1 coil 131 and the 1-3 coil 133. The plurality of terminals of the substrate 120 may include two terminals electrically connected to the coils of the first coil 130 arranged on an imaginary second plane perpendicular to the first plane. That is, the plurality of terminals of the substrate 120 may include two terminals electrically connected to the 1-2 coil 132 and the 1-4 coil 134. The plurality of terminals of the substrate 120 may include four terminals electrically connected to the first Hall sensor 521. The plurality of terminals of the substrate 120 may include four terminals electrically connected to the second Hall sensor 522 .

[0100] In a modified example, the substrate 120 may include 15 terminals, in which case the first and second Hall sensors 521 and 522 may share one terminal and be electrically connected to seven terminals.

[0101] The lens driving device 10 may include a first coil 130. The stator 100 may include the first coil 130. The first coil 130 may be disposed on the substrate 120. The first coil 130 may face the first magnet 320. The first coil 130 may move the holder 310 in a direction perpendicular to the optical axis direction. The first coil 130 may be an OIS coil. When a current is supplied to the first coil 130, an electromagnetic field may be formed around the first coil 130. As a result, the first coil 130 may electromagnetically interact with the first magnet 320.

[0102] The first coil 130 may include a coil disposed on the first portion 121 of the substrate 120. The first coil 130 may be disposed on the first portion 121 of the substrate 120. The first coil 130 may include a coil disposed on the second portion 122 of the substrate 120. The first coil 130 may be disposed on the second portion 122 of the substrate 120. The first coil 130 may include a coil disposed on the third portion 123 of the substrate 120. The first coil 130 may be disposed on the third portion 123 of the substrate 120. The first coil 130 may include a coil disposed on the fourth portion 124 of the substrate 120. The first coil 130 may be disposed on the fourth portion 124 of the substrate 120. The first coil 130 may be disposed on a first side surface of the base 110. The first coil 130 may include a coil disposed on the first side surface of the base 110.

[0103] In a modified example, the first magnet 320 may be disposed on a first side surface of the base 110. In this case, the first coil 130 may be disposed on the holder 310. The first magnet 320 may include a magnet disposed on the first side surface of the base 110.

[0104] The first coil 130 may include a plurality of first coils. The first coil 130 may include four first coils. The four first coils may be disposed in first to fourth portions 121, 122, 123, and 124 of the substrate 120, respectively.

[0105] The first coil 130 may include a 1-1 coil 131 and a 1-3 coil 133. The 1-1 coil 131 and the 1-3 coil 133 may be OIS-x coils. That is, the 1-1 coil 131 and the 1-3 coil 133 can move the holder 310 in a first direction (x-axis direction) perpendicular to the optical axis direction.

[0106] The first coil 130 may include a first-second coil 132 and a first-fourth coil 134. The first-second coil 132 and the first-fourth coil 134 may be OIS-y coils. That is, the first-second coil 132 and the first-fourth coil 134 may move the holder 310 in a second direction (y-axis direction) perpendicular to the optical axis direction and the first direction.

[0107] The 1-1 coil 131 may be a first unit coil, the 1-2 coil 132 may be a second unit coil, the 1-3 coil 133 may be a third unit coil, and the 1-4 coil 134 may be a fourth unit coil.

[0108] The lens driving device 10 may include a second coil 140. The stator 100 may include the second coil 140. The second coil 140 may be disposed on the substrate 120. The second coil 140 may face the second magnet 220. The second coil 140 may move the holder 310 and the housing 210 in the optical axis direction. The second coil 140 may be an AF coil. When a current is supplied to the second coil 140, an electromagnetic field may be formed around the second coil 140. As a result, the second coil 140 may electromagnetically interact with the second magnet 220.

[0109] The second coil 140 may include a coil disposed on the first portion 121 of the substrate 120. The second coil 140 may be disposed on the first portion 121 of the substrate 120. The second coil 140 may include a coil disposed on the second portion 122 of the substrate 120. The second coil 140 may be disposed on the second portion 122 of the substrate 120. The second coil 140 may not be disposed on the third portion 123 and the fourth portion 124 of the substrate 120. The second coil 140 may be disposed on a first side surface of the base 110. The second coil 140 may include a coil disposed on the first side surface of the base 110.

[0110] In a modified example, the second magnet 220 may be disposed on the first side of the base 110. In this case, the second coil 140 may be disposed in the housing 210. The second magnet 220 may include a magnet disposed on the first side of the base 110. The second coil 140 may include a plurality of second coils. The second coil 140 may include two second coils. The second coil 140 may include a 2-1 coil 141 and a 2-2 coil 142. The 2-1 coil 141 may be disposed on the first portion 121 of the substrate 120. The 2-2 coil 142 may be disposed on the second portion 122 of the substrate 120.

[0111] The 2-1 coil 141 may be a first unit coil, and the 2-2 coil 142 may be a second unit coil.

[0112] The lens driving device 10 may include a second yoke 150. The stator 100 may include the second yoke 150. The second yoke 150 may be formed of a magnetic material. The second yoke 150 may be disposed on the substrate 120. The second yoke 150 may overlap the second magnet 220 in a direction perpendicular to the optical axis direction. The second yoke 150 may be formed of a metal. An attractive force may act between the second yoke 150 and the second magnet 220. The second yoke 150 may attract the second magnet 220. The second magnet 220 may move in a direction approaching the second yoke 150. As a result, the housing 210 may press the second ball 420 toward the base. That is, the attractive force between the second magnet 220 and the second yoke 150 may maintain contact between the housing 210 and the second ball 420 and between the base and the second ball 420.

[0113] The lens driving device 10 may include a cover member 170. The stator 100 may include a cover member 170. The cover member 170 may cover the first base 110. The cover member 170 may cover the base. The cover member 170 may be arranged to encase the base. The cover member 170 may be arranged to cover the substrate 120. The substrate 120 may be arranged on the inner surface of a side plate 172 of the cover member 170. The cover member 170 may include a 'cover can'. The cover member 170 may be a non-magnetic material. The cover member 170 may be made of metal. The cover member 170 may be made of a metal plate. The cover member 170 may be connected to a ground portion of the printed circuit board 50, thereby allowing the cover member 170 to be grounded. The cover member 170 may block electromagnetic interference (EMI). In this case, the cover member 170 can be called an 'EMI shield can'.

[0114] The cover member 170 may include a top plate 171 and side plates 172. The cover member 170 may include a top plate 171 and side plates 172 extending from the top plate 171. The side plates 172 of the cover member 170 may be coupled to the base. The cover member 170 may include the top plate 171 including a hole and the side plates 172 extending downward from the outer periphery or edge of the top plate 171. The side plates 172 may include multiple side plates. The side plates 172 may include four side plates.

[0115] The lens driving device 10 may include a mover. The mover may include a first mover 200 and a second mover 300. The mover may be arranged to move relative to a fixed part. The mover may include a housing 210 and a holder 310.

[0116] The lens driving device 10 may include a first movable element 200. The first movable element 200 may be disposed within the stator 100. The first movable element 200 may be movably disposed within the stator 100. The first movable element 200 may move in the optical axis direction relative to the stator 100. At this time, the second movable element 300 may move together with the first movable element 200. The first movable element 200 may move for AF driving. The first movable element 200 may be an AF movable element.

[0117] The lens driving device 10 may include a housing 210. The first movable element 200 may include a housing 210. The housing 210 may be disposed within the base. The housing 210 may be disposed outside the holder 310. The housing 210 may house the holder 310 inside. A second magnet 220 may be disposed in the housing 210. The housing 210 may move in the optical axis direction. The housing 210 may move during AF driving. The housing 210 may move in a vertical direction relative to the base 110.

[0118] The housing 210 may include an upper plate 211. The upper plate 211 may be disposed on the holder 310. The first ball 410 may be disposed on the upper plate 211. The first ball 410 may come into contact with the upper plate 211.

[0119] The housing 210 may include a side plate 212. The side plate 212 may extend from the top plate 211. The side plate 212 may extend downward from the periphery of the top plate 211. The side plate 212 may include multiple side plates. The side plate 212 may include four side plates.

[0120] The housing 210 may include a groove 213. The groove 213 may accommodate a portion of the first ball 410. The groove 213 may be a first ball-accommodating groove. The groove 213 may be in contact with the first ball 410. The groove 213 may be formed so that the first ball 410 does not come off. The groove 213 may contact the first ball 410 at one point. Alternatively, the groove 213 may contact the first ball 410 at two points. The groove 213 may contact the first ball 410 at three or more points. The groove 213 may be formed on the lower surface of the upper plate 211 of the housing 210.

[0121] The housing 210 may include a groove 214. The groove 214 may accommodate at least a portion of the protrusion 312 of the holder 310. The groove 214 may be formed on the inner surface of the side plate 212 of the housing 210. The thickness of the side plate 212 of the housing 210 in the portion where the groove 214 is formed may be thinner than the portion where the groove 214 is not formed.

[0122] The housing 210 may include a protrusion 215. The protrusion 215 may be in contact with the second ball 420. The protrusion 215 may protrude from an outer surface of the housing 210. The protrusion 215 may protrude outward from the side plate 212 of the housing 210. The second ball 420 may be disposed between the protrusion 215 of the housing 210 and the base. The protrusion 215 may include a first surface with which the second ball 420 contacts. The protrusion 215 may include multiple protrusions. The second ball 420 may be disposed on each of the multiple protrusions of the housing 210. The multiple protrusions of the housing 210 may be disposed symmetrically with respect to the optical axis. In this case, the multiple second balls 420 disposed on the multiple protrusions may be symmetric with respect to the optical axis. However, since the second balls 420 are movable, moments of asymmetrical movement may occur among the multiple second balls 420. The protrusion 215 may have a groove formed therein in which at least a portion of the second ball 420 is received. The grooves of the protrusion 215 can be arranged symmetrically with respect to the optical axis.

[0123] The housing 210 may include a hole 216. The hole 216 may be hollow. The hole 216 may extend through the housing 210 in the optical axis direction.

[0124] The housing 210 may include a groove 217. The groove 217 may accommodate at least a portion of the first yoke 230. The groove 217 may be formed on an upper surface of the upper plate 211 of the housing 210. The groove 217 may be formed to a size and shape corresponding to the first yoke 230. The depth of the groove 217 may correspond to the thickness of the first yoke 230. Alternatively, the depth of the groove 217 may be shorter than the thickness of the first yoke 230. In this case, the portion of the first yoke 230 disposed in the groove 217 may protrude beyond the upper surface of the upper plate 211 of the housing 210.

[0125] The housing 210 may include a groove 218. The groove 218 may accommodate at least a portion of the second magnet 220. The groove 218 may be a second magnet accommodating groove. The groove 218 may be formed with a shape and size corresponding to the second magnet 220. The groove 218 may be recessed into the outer surface of the housing 210.

[0126] The lens driving device 10 may include a second magnet 220. The first mover 200 may include the second magnet 220. The second magnet 220 may be disposed in the housing 210. The second magnet 220 may face the second coil 140. The second magnet 220 may electromagnetically interact with the second coil 140. The second magnet 220 may be disposed on a side of the housing 210. The second magnet 220 may be biased toward one of both corners of the side of the housing 210.

[0127] The second magnet 220 may include a magnet facing the second coil 140 disposed on the first portion 121 of the substrate 120. The second magnet 220 may include a 2-1 magnet facing the 2-1 coil 141. The second magnet 220 may face the 2-1 coil 141. The second magnet 220 may include a magnet facing the first portion 121 of the substrate 120. The second magnet 220 may include a magnet facing the second coil 140 disposed on the second portion 122 of the substrate 120. The second magnet 220 may include a 2-2 magnet facing the 2-2 coil 142. The second magnet 220 may face the 2-2 coil 142. The second magnet 220 may include a magnet facing the second portion 122 of the substrate 120.

[0128] The second magnet 220 may include a plurality of magnets. The second magnet 220 may include two magnets. The second magnet 220 may include two magnets respectively arranged on two opposite sides of the housing 210. The second magnet 220 may include a 2-1 magnet and a 2-2 magnet. The 2-1 magnet may be arranged on a first side of the housing 210, and the 2-2 magnet may be arranged on a second side of the housing 210 opposite the first side. The 2-1 magnet may face the 2-1 coil 141, and the 2-2 magnet may face the 2-2 coil 142.

[0129] The 2-1 magnet may be the first unit magnet, and the 2-2 magnet may be the second unit magnet.

[0130] The lens driving device 10 may include a first yoke 230. The first armature 200 may include the first yoke 230. The first yoke 230 may be formed of a magnetic material. The first yoke 230 may be formed of a metal. The first yoke 230 may be disposed on an upper surface of the housing 210. The first yoke 230 may overlap the first magnet 320 and the first ball 410 in the optical axis direction. The first yoke 230 may be formed of a metal. An attractive force may act between the first yoke 230 and the first magnet 320. The first yoke 230 may attract the first magnet 320. The first magnet 320 may move in a direction approaching the first yoke 230. As a result, the holder 310 may press the first ball 410 against the upper plate 211 of the housing 210. That is, the contact between the holder 310 and the first ball 410 and the contact between the housing 210 and the first ball 410 can be maintained by the attractive force between the first magnet 320 and the first yoke 230 .

[0131] Alternatively, the first yoke 230 may be disposed on the lower surface of the upper plate 211 of the housing 210. In this case, the first ball 410 may move along the lower surface of the first yoke 230. In this case, to prevent an attractive force between the first ball 410 and the first yoke 230, the first ball 410 may be made of a non-metallic material.

[0132] The lens driving device 10 can include a second movable element 300. The second movable element 300 can be disposed within the stator 100. The second movable element 300 can be disposed movably within the first stator 100. The second movable element 300 can be disposed within the first movable element 200. The second movable element 300 can be disposed movably within the first movable element 200. The second movable element 300 can move in a direction perpendicular to the optical axis direction relative to the stator 100 and the first movable element 200. The second movable element 300 can move to drive the OIS. The second movable element 300 can be an OIS movable element.

[0133] The lens driving device 10 may include a holder 310. The second movable element 300 may include a holder 310. The holder 310 may be disposed within the housing 210. The holder 310 may be disposed within the base. The holder 310 may be disposed within the cover member 170. The holder 310 may be coupled to the lens. A first magnet 320 may be disposed in the holder 310. The holder 310 may move when the OIS is driven. The holder 310 may also move together with the housing 210 when the AF is driven. The holder 310 may move horizontally relative to the housing 210.

[0134] The holder 310 may include first and second sides disposed opposite each other, and third and fourth sides disposed opposite each other.

[0135] The holder 310 may include a groove 311. The groove 311 may accommodate at least a portion of the first ball 410. The groove 311 may be a first ball-accommodating groove. The groove 311 may be in contact with the first ball 410. The groove 311 may be formed so that the first ball 410 does not come off. The groove 311 may contact the first ball 410 at one point. Alternatively, the groove 311 may contact the first ball 410 at two points. The groove 311 may contact the first ball 410 at three or more points. The groove 311 may be formed on the upper surface of the holder 310.

[0136] The holder 310 may include a protrusion 312. The first magnet 320 may be disposed on the protrusion 312. The protrusion 312 may protrude from an outer surface of the holder 310. The protrusion 312 may have a groove formed therein in which the first magnet 320 is disposed. At least a portion of the protrusion 312 may be disposed in a groove 214 formed on an inner circumferential surface of the housing 210.

[0137] The holder 310 may include a hole 313. The hole 313 may be hollow. A lens may be placed in the hole 313. The groove 313 may penetrate the holder 310 in the optical axis direction.

[0138] The lens driving device 10 may include a first magnet 320. The second movable element 300 may include the first magnet 320. The first magnet 320 may be disposed on the holder 310. The first magnet 320 may face the first coil 130. The first magnet 320 may electromagnetically interact with the first coil 130. The first magnet 320 may be disposed on a side of the holder 310. The first magnet 320 may be disposed biased toward one corner of the side of the holder 310.

[0139] The first magnet 320 may include a magnet facing the first coil 130 disposed on the first portion 121 of the substrate 120. The first magnet 320 may include a magnet facing the 1-1 coil 131. The first magnet 320 may face the 1-1 coil 131. The first magnet 320 may include a magnet facing the first portion 121 of the substrate 120. The first magnet 320 may face the first portion 121 of the substrate 120.

[0140] The first magnet 320 may include a plurality of first magnets. The first magnet 320 may include four first magnets. The first magnet 320 may include a 1-1 magnet 321 and a 1-2 magnet 322. The 1-1 magnet 321 may be an OIS-x magnet. The 1-2 magnet 322 may be an OIS-y magnet. The 1-1 magnet 321 may include a magnet facing the 1-1 coil 131 and a magnet facing the 1-3 coil 133. The 1-2 magnet 322 may include a magnet facing the 1-2 coil 132 and a magnet facing the 1-4 coil 134. The first magnet 320 may include four magnets arranged on four sides of the holder 310, respectively.

[0141] The lens driving device 10 may include a first ball 410. The first ball 410 may contact the holder 310 and the housing 210. The first ball 410 may be disposed between the holder 310 and the housing 210. The first ball 410 may be disposed on an upper surface of the holder 310. The first ball 410 may contact a lower surface of the upper plate 211 of the housing 210. The first ball 410 may guide the holder 310 to move in a direction perpendicular to the optical axis direction relative to the housing 210. The first ball 410 may guide the OIS drive of the holder 310. The first ball 410 may be an OIS ball. The first ball 410 may be formed in a spherical shape. A metal may be disposed on one or more of the housing 210 and the holder 310 that contact the first ball 410. The housing 210 and the holder 310 may be formed by injection molding. At this time, a mark due to the first ball 410 may be generated on the housing 210 and the holder 310. To improve this, a metal may be inserted or a separate metal may be bonded or disposed in one or more of the housing 210 and the holder 310. That is, the first ball 410 may move in contact with the metal disposed in the housing 210 and the holder 310.

[0142] In this embodiment, the first balls 410 may be arranged in a single layer. In other words, the balls guiding in the OIS-X direction and the balls guiding in the OIS-Y direction may be arranged on a single imaginary plane. Therefore, the grooves 311 of the holder 310 may be formed to guide multiple balls arranged on a single imaginary plane in both the OIS-X and OIS-Y directions. Similarly, the grooves 213 of the housing 210 may be formed to guide multiple balls arranged on a single imaginary plane in both the OIS-X and OIS-Y directions. The grooves 311 of the holder 310 and the grooves 213 of the housing 210 may be larger than the first balls 410. In a modified example, one or more of the grooves 311 of the holder 310 and the grooves 213 of the housing 210 may be omitted. That is, only the groove 311 of the holder 310 may be formed, and the groove 213 of the housing 210 may not be formed. Conversely, the groove 213 of the housing 210 may be formed, and the groove 311 of the holder 310 may not be formed. Alternatively, both the groove 311 of the holder 310 and the groove 213 of the housing 210 may be omitted.

[0143] The first ball 410 may include a plurality of first balls. The first ball 410 may include four balls. In this case, an imaginary plane connecting the centers of the four balls may be perpendicular to the optical axis direction. The plurality of first balls may have the same size.

[0144] The lens driving device 10 may include a second ball 420. The second ball 420 may be in contact with the housing 210 and the base. The second ball 420 may be disposed between the housing 210 and the base. The second ball 420 may be disposed on the protrusion 215 of the housing 210. The housing 210 may include a groove formed on the protrusion 215 to accommodate at least a portion of the second ball 420. The second ball 420 may be disposed on the base. The base may include a groove to accommodate at least a portion of the second ball 420. The second ball 420 may guide the housing 210 to move in the optical axis direction relative to the base. The second ball 420 may guide the AF drive of the housing 210. The second ball 420 may be an AF ball. The second ball 420 may be formed in a spherical shape.

[0145] The second balls 420 may include a plurality of second balls. The second balls 420 may include two balls arranged symmetrically with respect to the optical axis. The second balls 420 may include six balls. In this case, the second balls 420 may be arranged in diagonal corner regions, three in each corner region. An imaginary plane connecting the plurality of second balls may include the optical axis or be parallel to the optical axis.

[0146] The lens driving device 10 may include a driver IC 510. The driver IC 510 may include a Hall element that senses the second magnet 220. The Hall element can sense the second magnet 220. The Hall element can sense the magnetic force of the second magnet 220. The Hall element can sense one or more of the position and movement of the second magnet 220. The Hall element can sense one or more of the position and movement amount of the housing 210 and the holder 310 in the optical axis direction. The value sensed by the Hall element can be used as feedback for AF drive.

[0147] The driver IC 510 may be disposed on the substrate 120. The driver IC 510 may be disposed on the first portion 121 of the substrate 120. The driver IC 510 may be electrically connected to the second coil 140. The driver IC 500 may control a current applied to the second coil 140. The driver IC 500 may provide a current to the second coil 140.

[0148] The lens driving device 10 may include a capacitor 511. The capacitor 511 is provided in case a large voltage is input to the driver IC 500 or a sudden voltage drop occurs. The capacitor 511 may be connected to an external power source. The external power source may enter the driver IC 500 through the capacitor 511. In this case, the capacitor 511 and the driver IC 500 may be connected in series.

[0149] The lens driving device 10 may include a Hall sensor 520. The Hall sensor 520 may be disposed on the substrate 120. The Hall sensor 520 may sense the first magnet 320. The Hall sensor 520 may sense the magnetic force of the first magnet 320. The Hall sensor 520 may sense at least one of the position and movement of the first magnet 320.

[0150] The Hall sensor 520 may include a plurality of Hall sensors. The Hall sensor 520 may include two Hall sensors. As a result, the Hall sensor 520 can sense one or more of the position and movement amount in two axial directions (x-axis and y-axis) perpendicular to the optical axis direction of the housing 210. The value sensed by the Hall sensor 520 can be used as feedback for driving the OIS.

[0151] The Hall sensor 520 may include a first Hall sensor 521 and a second Hall sensor 522. The Hall sensor 520 may include the first Hall sensor 521 that detects movement in a first direction perpendicular to the optical axis direction of the holder 310. The Hall sensor 520 may include the second Hall sensor 522 that detects movement in a second direction perpendicular to the optical axis direction and the first direction of the holder 310.

[0152] In this embodiment, the lens driving device 10 may include a driving unit. The driving unit may include a coil and a magnet for moving the holder 310. The driving unit may include a first driving unit and a second driving unit. The first driving unit may move the holder 310. The first driving unit may move the housing 210. The first driving unit may include a first coil 130 and a first magnet 320. The second driving unit may move both the holder 310 and the housing 210. The second driving unit may include a second coil 140 and a second magnet 220.

[0153] At least a portion of the first driving unit and at least a portion of the second driving unit may be disposed on a first side surface of the base 110. The first driving unit and the second driving unit may be disposed on two of the four sides of the base 110 that face each other. The second driving unit may be disposed on the remaining two sides of the base 110. The first driving unit may be disposed on two of the four sides of the base 110 that face each other. The second driving unit may be disposed on the four sides of the base 110.

[0154] This embodiment may include an AF structure in which the AF actuator is supported in a diagonal direction, and the AF actuator and the fixed part are closely attached to each other by the attractive force between each yoke and magnet, with a plurality of balls positioned therebetween. Here, the AF actuator may be the first mover 200, and the fixed part may be the stator 100.

[0155] This embodiment may include a structure in which a holder 310 is located inside the AF driver and is driven in a direction perpendicular to the optical axis by diagonally positioned driving magnets and opposing coils to correct shaking. In this case, the OIS driver may be positioned between one or more yokes located on the upper side of the housing 210 and opposing magnets due to the generation of attractive force between them. Furthermore, this embodiment may include a structure in which a plurality of grooves are formed on the same surface in each direction to allow movement in the X and Y directions.

[0156] The first driver may move the housing 210. The second driver may move the holder 310. Portions of the first driver may be disposed on the first and third sides of the base 110 facing each other. The second driver may include a first unit driver partially disposed on the first side of the base 110 and a second unit driver partially disposed on the fourth side of the base 110. The first and second unit drivers may move the holder 310 in different directions. Another portion of the first unit driver may be disposed on the third side of the base 110. Another portion of the second unit driver may be disposed on the second side facing the fourth side of the base 110. The first unit driver disposed on the first and third sides of the base 110 may be a first unit coil. There may be at least two first unit coils, one of which may be disposed on the first side and the other on the third side. The base 110 may include a first unit magnet disposed to correspond to the first unit coil. At least two first unit magnets may be coupled to the holder 310. The first actuator disposed on the first and third sides of the base 110 may be the first coil 130. The first actuator may include a first magnet 320 coupled to the housing 210 in correspondence with the first coil 130.

[0157] The second driving unit may include a second coil 140 and a second magnet 220. The second coil 140 may include a first unit coil and a second unit coil. The first unit driving unit may include a first unit coil and a first unit magnet. The second magnet 220 may include a first unit magnet and a second unit magnet. The second unit driving unit may include a second unit coil and a second unit magnet. The first driving unit may include a first coil 130 and a first magnet 320.

[0158] The actuators may include a first unit actuator including a first unit coil or a first unit magnet disposed on a first side of the base 110, and a second unit actuator including a second unit coil or a second unit magnet disposed on a fourth side of the base 110. The first and second unit actuators may move the holder 310 in different directions. The base 110 may include a first corner where the first and fourth sides meet and a fourth corner where the third and fourth sides meet. There may be a plurality of first and second unit coils. One first unit coil and one second unit coil among the plurality may be disposed closer to the first corner than the fourth corner. The base 110 may include a third corner diagonally opposite the first corner. Another first unit coil and another second unit coil among the plurality may be disposed closer to the third corner than the fourth corner.

[0159] The lens driving device 10 according to this embodiment can be assembled in the following process order: after assembling the OIS unit, the AF unit is assembled, and then the base and cover member 170 are assembled.

[0160] In this embodiment, the ball guide structure for AF drive can be positioned diagonally. The ball can be tightly attached to the ball guide part due to the attractive force between the moving magnet and the yoke. A structure in which the ball is tightly attached and driven by the attractive force acting in two directions can be included.

[0161] In this embodiment, the OIS can be driven by bringing the balls into close contact with the OIS driving magnet due to the attractive force of the magnetic yoke located on the upper side of the housing 210. A plurality of balls are located between the inner ceiling surface of the housing 210 and the upper surface of the holder 310, and ball guide grooves formed on the same plane can be formed to be movable in directions perpendicular to each other.

[0162] In this embodiment, a plurality of OIS magnets and coils may be arranged diagonally.

[0163] In this embodiment, when a forward current is applied to the second coil 140, the second magnet 220 can move upward along the optical axis (z-axis) due to electromagnetic interaction between the second coil 140 and the second magnet 220. At this time, the housing 210 and the holder 310 can also move upward together with the second magnet 220 (see A-F in FIG. 22).

[0164] When a reverse current is applied to the second coil 140, the second magnet 220 moves downward along the optical axis due to electromagnetic interaction between the second coil 140 and the second magnet 220. At this time, the housing 210 and the holder 310 also move downward together with the second magnet 220 (see A-F in FIG. 22).

[0165] When a current is applied to the 1-1 coil 131 and the 1-3 coil 133, electromagnetic interaction occurs between the 1-1 coil 131, the 1-3 coil 133, and the 1-1 magnet 321, causing the 1-1 magnet 321 to move in a first direction (x-axis direction) perpendicular to the optical axis direction. At this time, the holder 310 can also move in the first direction together with the 1-1 magnet 321 (see OIS X in FIG. 22). However, when a current is applied to the 1-1 coil 131, the holder 310 may be controlled to move to one side of the x-axis, and when a current is applied to the 1-3 coil 133, the holder 310 may be controlled to move to the other side of the x-axis. Alternatively, when a forward current is applied to the 1-1 coil 131 and the 1-3 coil 133, the holder 310 may be controlled to move to one side of the x-axis, and when a reverse current is applied to the 1-1 coil 131 and the 1-3 coil 133, the holder 310 may be controlled to move to the other side of the x-axis. The 1-1 coil 131 and the 1-3 coil 133 may be controlled to be electrically separated from each other. Alternatively, the 1-1 coil 131 and the 1-3 coil 133 may be electrically connected to each other.

[0166] When a current is applied to the 1-2 coil 132 and the 1-4 coil 134, electromagnetic interaction between the 1-2 coil 132, the 1-4 coil 134, and the 1-2 magnet 322 causes the 1-2 magnet 322 to move in a second direction (y-axis) perpendicular to the optical axis direction and the first direction. At this time, the holder 310 can also move in the second direction together with the 1-2 magnet 322 (see OIS Y in FIG. 22). However, when a current is applied to the 1-2 coil 132, the holder 310 may be controlled to move to one side of the y-axis, and when a current is applied to the 1-4 coil 134, the holder 310 may be controlled to move to the other side of the y-axis. Alternatively, when a forward current is applied to the first-second coil 132 and the first-fourth coil 134, the holder 310 may be controlled to move to one side in the y-axis, and when a reverse current is applied to the first-second coil 132 and the first-fourth coil 134, the holder 310 may be controlled to move to the other side in the y-axis. The first-second coil 132 and the first-fourth coil 134 may be controlled to be electrically separated from each other. Alternatively, the first-second coil 132 and the first-fourth coil 134 may be electrically connected to each other.

[0167] A camera module according to a modified example will be described below with reference to the drawings.

[0168] Figure 23 is an exploded oblique view of a lens driving device according to a modified example, Figure 24 is a perspective view of a portion of the configuration of a lens driving device according to a modified example, Figure 25 is an enlarged view of a portion of Figure 24, and Figure 26 is a perspective view of a portion of the configuration of a lens driving device according to a modified example.

[0169] Hereinafter, the configuration of the camera module according to the modified example will be described, focusing on differences from the camera module according to the present embodiment. For configurations not described below, the description of the corresponding configuration of the camera module according to the present embodiment can be applied by analogy.

[0170] The lens driving device 10 may include a guide unit. The guide unit may be disposed between the holder 310 and the housing 210. The guide unit may include a retainer (first yoke 230a) including a hole 231 and a first ball 410 disposed in the hole 231. The guide unit may be disposed to overlap the holder 310 and the housing 210 in the optical axis direction. The retainer may be coupled to the holder 310 or the housing 210. The first ball 410 may move or roll in a direction perpendicular to the optical axis direction. The retainer may function as a yoke. The retainer may be magnetic. The retainer may include magnetism. An attractive force may act between the retainer and the first magnet 320.

[0171] The lens driving device 10 may include a first yoke 230a. The first yoke 230a may be a 'retainer'. The first armature 200 may include a first yoke 230a. The first yoke 230a may be formed of a magnetic material. The first yoke 230a may be formed of a metal. The first yoke 230a may be fixed to the housing 210. The first yoke 230a may be coupled to the housing 210. The first yoke 230a may be disposed below the upper plate 211 of the housing 210. The first yoke 230a may be disposed on the lower surface of the upper plate 211 of the housing 210. The first yoke 230a may be fixed to the lower surface of the upper plate 211 of the housing 210. The first yoke 230a may be disposed closer to one of two corner regions of the upper surface of the holder 310. The first yoke 230a may overlap the first magnet 320 in the optical axis direction. The first yoke 230a may be made of metal. An attractive force may act between the first yoke 230a and the first magnet 320. The first yoke 230a may attract the first magnet 320. The first magnet 320 may move in a direction approaching the first yoke 230a. As a result, the holder 310 may press the first ball 410 toward the upper plate 211 of the housing 210. That is, due to the attractive force between the first magnet 320 and the first yoke 230a, contact between the holder 310 and the first ball 410 and contact between the housing 210 and the first ball 410 may be maintained.

[0172] In this embodiment, the cross section of the first yoke 230a may be formed in an approximately U-shape or a rotated ⊂-shape. In this case, both ends of the first yoke 230a may be coupled to the housing 210. In a modified example, the cross section of the first yoke 230a may be formed in an approximately inverted U-shape. In this case, both ends of the first yoke 230a may be coupled to the holder 310.

[0173] In this embodiment, the first magnet 320 may include a 1-1 magnet 321 arranged on a first side of the holder 310, a 1-2 magnet 322 arranged on a second side of the holder 310, a 1-3 magnet 323 arranged on a third side of the holder 310, and a 1-4 magnet 324 arranged on a fourth side of the holder 310.

[0174] The 1-1 magnet 321 may be a first unit magnet, the 1-2 magnet 322 may be a second unit magnet, the 1-3 magnet 323 may be a third unit magnet, and the 1-4 magnet 324 may be a fourth unit magnet.

[0175] In this case, the first yoke 230a may include a 1-1 yoke 230-1 overlapping with the 1-1 magnet 321 in the optical axis direction, a 1-2 yoke 230-2 overlapping with the 1-2 magnet 322 in the optical axis direction, a 1-3 yoke 230-3 overlapping with the 1-3 magnet 323 in the optical axis direction, and a 1-4 yoke 230-4 overlapping with the 1-4 magnet 324 in the optical axis direction. The first yoke 230a may include a plurality of first yokes. The first yoke 230a may include four first yokes.

[0176] The first yoke 230a may include holes 231. The first balls 410 may be disposed in the holes 231 of the first yoke 230a. The first balls 410 may be rotatably disposed in the holes 231 of the first yoke 230a. The diameter of the holes 231 of the first yoke 230a may correspond to the diameter of the first balls 410 or may be larger than the diameter of the first balls 410. The holes 231 of the first yoke 230a may be formed in the connecting plate 233. Three holes 231 of the first yoke 230a may be formed at equal intervals in each of the 1-1st to 1-4th yokes 230-1, 230-2, 230-3, and 230-4.

[0177] The first yoke 230a may include side plates 232 and a connecting plate 233. The first yoke 230a may include two side plates 232 whose upper ends are fixed to the housing 210. The first yoke 230a may include a connecting plate 233 that connects the two side plates 232. The connecting plate 233 of the first yoke 230a may overlap the center of the first ball 410 in a direction perpendicular to the optical axis direction.

[0178] In this embodiment, the first ball 410 may be rotatably disposed in the hole 231 of the first yoke 230a.

[0179] The guide unit may include a retainer including a first ball, a second ball, a first hole in which the first ball is received, and a second hole in which the second ball is received. The first ball may rotate within the first hole, and the second ball may rotate within the second hole. The second driving unit may include a first unit driving unit that drives the holder 310 in a first direction using the first and second balls, and a second unit driving unit that drives the holder 310 in a second direction different from the first direction using the first and second balls. The first and second balls may be spaced apart by the first and second holes. The spacing between the first and second balls may be greater than or equal to the spacing between the first and second holes. Alternatively, if the diameters of the first and second balls are greater than the diameter of the ball, the spacing between the first and second balls may be smaller than the spacing between the first and second holes.

[0180] Hereinafter, a camera module according to this embodiment will be described with reference to the drawings.

[0181] FIG. 27 is an exploded perspective view of the camera module according to this embodiment.

[0182] The camera module may be a camera device.

[0183] The camera module may include a lens module 20. The lens module 20 may include at least one lens. The lens may be disposed at a position corresponding to the image sensor 60. The lens module 20 may include a lens and a barrel. The lens module 20 may be coupled to a bobbin 210 of the lens driver 10. The lens module 20 may be coupled to the bobbin 210 by a screw connection and / or an adhesive. The lens module 20 may move integrally with the bobbin 210.

[0184] The camera module may include a filter 30. The filter 30 may serve to block light of a specific frequency band from entering the image sensor 60 among light passing through the lens module 20. The filter 30 may be arranged parallel to the xy plane. The filter 30 may be arranged between the lens module 20 and the image sensor 60. The filter 30 may be arranged on the sensor base. The filter 30 may include an infrared filter. The infrared filter may block light in the infrared region from entering the image sensor 60. The infrared filter may include an infrared reflective filter or an infrared absorbing filter.

[0185] The camera module may include a sensor base. The sensor base may be disposed between the lens driver 10 and the printed circuit board 50. The sensor base may include a protrusion on which the filter 30 is disposed. An opening may be formed in the portion of the sensor base on which the filter 30 is disposed so that light passing through the filter 30 can be incident on the image sensor 60. An adhesive member may be disposed between the sensor base and the lens driver 10. The adhesive member may adhere the lens driver 10 to the upper surface of the sensor base. The adhesive member may be configured to prevent foreign matter from entering the interior of the lens driver 10. The adhesive member may include one or more of epoxy, a heat-curing adhesive, and an ultraviolet-curing adhesive.

[0186] The camera module may include a printed circuit board (PCB) 50. The printed circuit board 50 may be a substrate or a circuit board. The lens driver 10 may be disposed on the printed circuit board 50. A sensor base may be disposed between the printed circuit board 50 and the lens driver 10. The printed circuit board 50 may be electrically connected to the lens driver 10. An image sensor 60 may be disposed on the printed circuit board 50. The printed circuit board 50 includes various circuits, elements, a control unit, etc. for converting an image formed on the image sensor 60 into an electrical signal and transmitting the signal to an external device.

[0187] The camera module may include an image sensor 60. The image sensor 60 may be configured to form an image by receiving light that has passed through a lens and a filter 30. The image sensor 60 may be mounted on a printed circuit board 50. The image sensor 60 may be electrically connected to the printed circuit board 50. For example, the image sensor 60 may be attached to the printed circuit board 50 using surface mounting technology (SMT). As another example, the image sensor 60 may be attached to the printed circuit board 50 using flip chip technology. The image sensor 60 may be disposed such that its optical axis coincides with that of a lens. That is, the optical axis of the image sensor 60 and the optical axis of the lens are aligned. The image sensor 60 may convert light irradiated onto an effective image area of the image sensor 60 into an electrical signal. The image sensor 60 may be any of a charge coupled device (CCD), a metal oxide semiconductor (MOS), a CPD, and a CID.

[0188] The camera module may include a motion sensor 70. The motion sensor 70 may be mounted on the printed circuit board 50. The motion sensor 70 may be electrically connected to the control unit 80 via a circuit pattern provided on the printed circuit board 50. The motion sensor 70 may output rotational angular velocity information according to the movement of the camera module. The motion sensor 70 may include a two-axis or three-axis gyro sensor or an angular velocity sensor.

[0189] The camera module may include a control unit 80. The control unit 80 may be disposed on the printed circuit board 50. The control unit 80 may be electrically connected to the coils 130 of the lens driving device 10. The control unit 80 may individually control the direction, strength, and amplitude of the current supplied to the coils 130. The control unit 80 may control the lens driving device 10 to perform an autofocus function. The control unit 80 may be electrically connected to a Hall sensor 140. The control unit 80 may sense the position of the mover 200 through the Hall sensor 140 and perform autofocus feedback control on the lens driving device 10.

[0190] The camera module may include a connector 90. The connector 90 may be electrically connected to the printed circuit board 50. The connector 90 may include a port for electrically connecting to an external device.

[0191] The optical device according to this embodiment will be described below with reference to the drawings.

[0192] FIG. 28 is a perspective view of the optical device according to this embodiment. The optical device may include one or more of a mobile phone, a smartphone, a portable communication device, a portable smart device, a portable terminal, a digital camera, a computer, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistant), a PMP (Portable Multimedia Player), and a navigation system. However, the type of optical device is not limited thereto, and any device for taking images or photographs may also be included in the optical device.

[0193] The optical device may include a main body 1. The main body 1 may form the exterior of the optical device. The main body 1 may house a camera module 2. A display 3 may be disposed on a first surface of the main body 1. For example, the display 3 and the camera module 2 may be disposed on the first surface of the main body 1, and an additional camera module 2 may be disposed on a second surface of the main body 1 opposite to the first surface.

[0194] The optical device may include a camera module 2. The camera module 2 may be disposed in the main body 1. At least a portion of the camera module 2 may be housed inside the main body 1. A plurality of camera modules 2 may be provided. The camera module 2 may include dual, triple, or more camera modules. The camera modules 2 may be disposed on a first surface of the main body 1 and a second surface opposite to the first surface of the main body 1. The camera module 2 may capture an image and / or video of a subject.

[0195] The optical device may include a display 3. The display 3 may be disposed on the main body 1. The display 3 may be disposed on a first surface of the main body 1. The display 3 may output images and / or videos captured by the camera module 2.

[0196] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art will understand that the present invention can be embodied in other specific forms without changing the technical spirit or essential characteristics thereof. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and are not limiting.

Claims

1. A base including a first side and a second side arranged opposite each other, and a third side and a fourth side arranged opposite each other; a substrate disposed on the base; a housing and holder arranged to move relative to the base; a first magnet and a first coil for moving the holder; and a second magnet and a second coil for moving the housing; the substrate includes a first portion disposed on the first side of the base; the first coil includes a 1-1 coil disposed on the first portion of the substrate; The second coil includes a 2-1 coil disposed on the first portion of the substrate.

2. The first-1 coil includes an inner surface facing the first magnet, the second-1 coil includes an inner surface facing the second magnet, 2. The camera module according to claim 1, wherein the inner surface of the first-1 coil and the inner surface of the second-1 coil are arranged parallel to each other.

3. A camera module as described in claim 1, wherein the first magnet is arranged in the holder and includes a magnet facing the 1-1 coil.

4. A camera module as described in claim 1, wherein the second magnet includes a magnet arranged in the housing and facing the second-1 coil.

5. The first magnet and the first coil are configured to move the holder in a direction perpendicular to the optical axis direction, The camera module according to claim 1 , wherein the second magnet and the second coil move the holder and the housing in the optical axis direction.

6. The substrate includes a second portion disposed on the second side surface of the base; the first coil includes first to third coils disposed on the second portion of the substrate; The camera module of claim 1 , wherein the second coil includes a 2-2 coil disposed on the second portion of the substrate.

7. A camera module as described in Claim 6, wherein the first-1 coil overlaps with the second-2 coil in a direction perpendicular to the first portion of the substrate.

8. The substrate includes a third portion disposed on the third side surface of the base and a fourth portion disposed on the fourth side surface of the base; The camera module of claim 1 , wherein the second coil is not disposed in the third portion and the fourth portion of the substrate.

9. The camera module according to claim 8 , wherein the first coil includes coils disposed in the third portion and the fourth portion of the substrate.

10. the first magnet includes four magnets disposed on four sides of the holder, The camera module according to claim 1 , wherein the second magnet includes two magnets respectively disposed on two opposite side surfaces of the housing.

11. a first ball contacting the holder and the housing; The camera module of claim 1 , wherein the first ball is disposed on an upper surface of the holder.

12. a first yoke disposed on an upper surface of the housing; The camera module according to claim 11 , wherein the first yoke overlaps with the first magnet and the first ball in the optical axis direction.

13. the first balls include four balls; The camera module according to claim 11 , wherein an imaginary plane connecting the centers of the four balls is perpendicular to the optical axis direction.

14. a second ball contacting the housing and the base; The camera module according to claim 1 , wherein the second ball includes two balls arranged symmetrically with respect to an optical axis.

15. a second yoke disposed on the substrate; The camera module according to claim 14 , wherein the second yoke overlaps with the second magnet in a direction perpendicular to the optical axis direction.

16. The housing includes an upper plate disposed on the holder, The camera module of claim 12 , wherein the first yoke is disposed on the top plate of the housing.

17. the base includes two protrusions formed on the third side surface of the base and spaced apart from each other in an optical axis direction; the third portion of the substrate includes a first region in which the first coil is disposed, and a second region extending from the first region and disposed between the two protrusions of the base; The camera module according to claim 8 , wherein a length of the first region of the substrate is longer than a length of the second region of the substrate in the optical axis direction.

18. A printed circuit board; an image sensor disposed on the printed circuit board; and The camera module of claim 1 , further comprising a lens coupled to the holder.

19. a base including a first side, a second side, a third side, and a fourth side; a substrate disposed on the base; a housing that moves in an optical axis direction relative to the base; a holder that moves in a direction perpendicular to the optical axis direction relative to the housing; a first magnet and a first coil for moving the holder; and a second magnet and a second coil for moving the housing; the substrate includes a first portion disposed on the first side of the base; the first coil includes a 1-1 coil disposed on the first portion of the substrate; The second coil includes a 2-1 coil disposed on the first portion of the substrate.

20. Main body: A camera module according to any one of claims 1 to 19, disposed on the main body; and an optical device including a display disposed on the body and configured to output at least one of an image captured by the camera module and a video;

Images