Lens drive unit, camera module and optical unit

Abstract

This embodiment relates to a lens driving device, comprising: a fixing unit; a mover configured to move relative to the fixing unit, the mover including an outer cover and a retainer; and a driving unit for moving the mover, wherein the driving unit includes a first driving unit for moving the retainer and a second driving unit for moving the outer cover, and at least a portion of the first driving unit and at least a portion of the second driving unit are disposed on a first side of the fixing unit.

Description

Technical Field

[0001] This embodiment relates to a lens driving device, a camera module, and an optical device. Background Technology

[0002] With the widespread adoption of various portable terminals and the commercialization of wireless internet services, consumer demand for portable terminals is diversifying, leading to the installation of various types of add-ons in portable terminals.

[0003] A typical example is a camera module that takes pictures or videos of a subject. Simultaneously, an autofocus function that automatically adjusts the focus based on the distance to the subject is applied to the nearest camera module. Furthermore, a hand-shake correction function is also applied to compensate for user hand tremors.

[0004] However, in the case of a spring-type module, the current must flow continuously in order to move the lens to the desired position due to the elastic force of the spring, which leads to increased current consumption.

[0005] Furthermore, with the adoption of high-pixel image sensors, the weight and size of the lenses have also increased, and the increased weight of the drive unit in existing spring or suspension methods has become a risk factor in terms of performance and reliability. Summary of the Invention

[0006] Technical topics

[0007] This embodiment aims to provide a ball-bearing lens drive device that can reduce current consumption compared to a spring-type lens drive device.

[0008] Furthermore, the aim is to provide a lens driving device capable of employing large-diameter lenses.

[0009] Technical solutions

[0010] The lens driving device according to this embodiment includes: a fixed portion; a mover configured to move relative to the fixed portion, the mover including an outer cover and a retainer; and a driving unit for moving the mover, wherein the driving unit includes a first driving unit and a second driving unit, the first driving unit for moving the retainer, the second driving unit for moving the outer cover, and wherein 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 fixed portion.

[0011] The first driving unit includes a first coil and a first magnet, and the second driving unit may include a second coil and a second magnet.

[0012] The first coil and the second coil can be disposed on the first side surface of the fixed portion.

[0013] The first magnet and the second magnet can be disposed on the first side surface of the fixed portion.

[0014] The fixing part may include a base and a substrate disposed in the base. The base may include a first side surface to a fourth side surface, and the substrate may include a first portion disposed on the first side surface of the base.

[0015] The first coil can move the retainer in a direction perpendicular to the optical axis, and the second coil can move the retainer and the outer cover in the optical axis direction.

[0016] The second side surface of the base is disposed on the opposite side of the first side surface of the base, the substrate includes a second portion disposed on the second side surface of the base, and the first coil and the second coil may each include a coil disposed in the second portion of the substrate.

[0017] The third side surface of the base is disposed on the opposite side of the fourth side surface of the base, 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, and the second coil may not be disposed in the third and fourth portions of the base.

[0018] The first coil may include coils disposed in the third and fourth portions of the substrate.

[0019] The first magnet may include four magnets respectively disposed on four side surfaces of the retainer, and the second magnet may include two magnets respectively disposed on two side surfaces on opposite sides of the outer cover.

[0020] The lens driving device may include a first ball bearing that contacts a retainer and an outer cover, and the first ball bearing may be disposed on the upper surface of the retainer.

[0021] The lens driving device may include a first yoke disposed on the upper surface of the outer cover, and the first yoke may overlap with the first magnet and the first ball in the optical axis direction.

[0022] The first ball bearing includes four balls, and the virtual plane connecting the centers of the four balls can be perpendicular to the optical axis.

[0023] It may include a second ball bearing that contacts the outer casing and the base, and the second ball bearing may include two balls arranged symmetrically with respect to the optical axis.

[0024] It includes a second yoke, which is disposed on the substrate and can overlap with the second magnet in a direction perpendicular to the optical axis.

[0025] The first magnet includes a magnet facing a first coil disposed in a first portion of the substrate, and the second magnet may include a magnet facing a second coil disposed in the first portion of the substrate.

[0026] The base includes two protruding portions that protrude from a third side surface of the base and are spaced apart from each other in the optical axis direction. The third portion of the substrate includes a first region and a second region. The first region is provided with a first coil, and the second region extends from the first region and is disposed between the two protruding portions of the base. In the optical axis direction, the length of the first region of the substrate may be greater than the length of the second region of the substrate.

[0027] The lens driving device may include a driver IC, which includes a Hall element for detecting a second magnet and is disposed in a first portion of the substrate and electrically connected to a second coil.

[0028] The lens driving device includes a Hall sensor disposed in a substrate and sensing a first magnet. The Hall sensor may include: a first Hall sensor that detects movement of a retainer in a first direction perpendicular to the optical axis; and a second Hall sensor that detects movement of the retainer in a second direction perpendicular to both the optical axis and the first direction.

[0029] The substrate includes a plurality of terminals, wherein the plurality of terminals of the substrate may include: four terminals electrically connected to a driver IC; two terminals electrically connected to a coil disposed on a first imaginary plane in a first coil; two terminals electrically connected to a coil disposed on a virtual second plane perpendicular to the first plane in the first coil; four terminals electrically connected to a first Hall sensor; and four terminals electrically connected to a second Hall sensor.

[0030] The lens driving device may include: an upper plate; a side plate extending from the upper plate; and a cover member covering the base, wherein the side plate of the cover member may be connected to the base.

[0031] The camera module according to this embodiment may include: a printed circuit board; an image sensor disposed in the printed circuit board; a lens driving device disposed on the printed circuit board; and a lens coupled to a retainer of the lens driving device.

[0032] The optical device according to this embodiment may include: a main body; a camera module disposed in the main body; and a display disposed in the main body, the display outputting at least one of an image and a video captured by the camera module.

[0033] The lens driving device according to this embodiment includes: a base including a first side surface to a fourth side surface; an outer cover that is movable in a vertical direction relative to the base; a retainer that is movable in a horizontal direction relative to the outer cover; a first driving unit for moving the outer cover; and a second driving unit for moving the retainer, wherein a portion of the first driving unit is disposed on a first side surface and a third side surface facing each other, wherein the second driving unit includes a first unit driving unit and a second unit driving unit, the first unit driving unit being partially disposed on the first side surface and the second unit driving unit being partially disposed on the fourth side surface, and wherein the first unit driving unit and the second unit driving unit are capable of moving the retainer in different directions.

[0034] Another part of the first unit driving unit is disposed on a third side surface opposite to the first side surface, and another part of the second unit driving unit can be disposed on a second side surface opposite to the fourth side surface.

[0035] The first unit driving unit disposed on the first side surface and the third side surface can be the first unit coil.

[0036] The first unit coil may be at least two, and one of the two first unit coils is disposed on the first side surface, and the other first unit coil is disposed on the third side surface.

[0037] The first unit magnet is configured to correspond to the included first unit coil, and the number of the first unit magnets is at least two, and they can be connected to the retainer.

[0038] The first driving unit disposed on the first side surface and the third side surface can be the first coil.

[0039] The first driving unit may include a first magnet that is coupled to the outer casing and corresponds to the first coil.

[0040] The lens driving device according to this embodiment includes: a base, the base including a first side surface to a fourth side surface; an outer cover, the outer cover being movable in a vertical direction relative to the base; a retainer, the retainer being movable in a horizontal direction relative to the outer cover; and a driving unit for moving the retainer, wherein the driving unit includes a first unit driving unit and a second unit driving unit, the first unit driving unit including a first unit coil or a first unit magnet disposed on the first side surface, the second unit driving unit including a second unit coil or a second unit magnet disposed on the fourth side surface, wherein the first unit driving unit and the second unit driving unit move the retainer in different directions, wherein the base includes a first corner and a fourth corner, the first side surface and the fourth side surface converging at the first corner, the third side surface and the fourth side surface converging at the fourth corner, wherein there are multiple first unit coils and multiple second unit coils, and one of the multiple first unit coils and one of the multiple second unit coils can be configured to be closer to the first corner than the fourth corner.

[0041] The base includes a third corner in a direction diagonally opposite to the first corner, wherein a first unit coil, which is one of the plurality of first unit coils and the plurality of second unit coils, and a second unit coil, which is the other, can be positioned closer to the third corner than the fourth corner.

[0042] The lens driving device according to this embodiment includes: a fixed portion; a mover movably configured to move relative to the fixed portion, and the mover including an outer cover and a retainer; a driving unit for moving the mover; and a guide portion disposed between the outer cover and the retainer, wherein the driving unit includes a first driving unit for moving the outer cover and a second driving unit for moving the retainer, wherein the guide portion includes a retainer including a first ball and a second ball, a first hole for receiving the first ball and a second hole for receiving the second ball, and wherein the first ball rotates inside the first hole, and the second ball can rotate inside the second hole.

[0043] The second drive unit may include: a first drive unit for driving a retainer in a first direction via a first ball and a second ball; and a second drive unit for driving the retainer in a second direction different from the first direction via the first ball and the second ball.

[0044] The first ball and the second ball can be spaced apart from each other through the first hole and the second hole.

[0045] The distance between the first ball and the second ball can be greater than or equal to the distance between the first hole and the second hole.

[0046] The lens driving device according to this embodiment includes: a base; an outer cover disposed inside the base; a retainer disposed inside the outer cover; and a guide portion disposed between the retainer and the outer cover, wherein the guide portion includes a retainer, the retainer including a hole and a ball disposed in the hole, and wherein the guide portion can be configured to overlap with the retainer and the outer cover in the optical axis direction.

[0047] The lens driving device according to this embodiment includes: a base; an outer cover configured to move in the optical axis direction; a retainer configured to move in a direction perpendicular to the optical axis direction; and a guide portion disposed between the retainer and the outer cover, wherein the guide portion may include a retainer and a ball disposed in the retainer.

[0048] The retainer is attached to the retainer or the outer cover, and the ball can move or roll in a direction perpendicular to the optical axis.

[0049] The retainer can perform the function of the yoke.

[0050] It may include a magnet disposed in the retainer, and an attractive force may act between the retainer and the magnet.

[0051] The lens driving device according to this embodiment includes: a base; an outer cover disposed inside the base; a retainer disposed inside the outer cover; a first magnet disposed in the retainer; a second magnet disposed in the outer cover; a substrate disposed in the base; a first coil disposed in the substrate and facing the first magnet; a second coil disposed in the substrate and facing the second magnet; a first ball bearing in contact with the retainer and the outer cover; and a first yoke fixed to the outer cover and overlapping the first magnet in the optical axis direction, wherein the first yoke may include a hole in which the first ball bearing is disposed.

[0052] The diameter of the hole in the first yoke can correspond to the diameter of the first ball or be formed to be larger than the diameter of the first ball.

[0053] The first ball bearing can be rotatably positioned in the hole of the first yoke.

[0054] The first yoke includes: two side plates, the upper ends of which are fixed to the outer cover; and a connecting plate connecting the two side plates, wherein a hole in the first yoke can be formed in the connecting plate.

[0055] The connecting plate of the first yoke can overlap with the center of the first ball in a direction perpendicular to the optical axis.

[0056] The retainer includes: a first side surface and a second side surface disposed on opposite sides of each other; a third side surface and a fourth side surface disposed on opposite sides of each other; wherein the first magnet includes: a first-first magnet disposed on the first side surface of the retainer; a first-second magnet disposed on the second side surface of the retainer; a first-third magnet disposed on the third side surface of the retainer; and a first-fourth magnet disposed on the fourth side surface of the retainer; and wherein the first yoke may include: a first-first magnet overlapping the first-first magnet in the optical axis direction; a first-second yoke overlapping the first-second magnet in the optical axis direction; a first-third yoke overlapping the first-third magnet in the optical axis direction; and a first-fourth yoke overlapping the first-fourth magnet in the optical axis direction.

[0057] The holes in the first yoke can be formed in three at equal intervals in each of the first-first yoke to the first-fourth yoke.

[0058] The outer cover may include an upper plate and side plates extending downward from the upper plate, and a first ball may be disposed between the upper plate of the outer cover and the upper surface of the retainer.

[0059] The first yoke is fixed to the lower surface of the upper plate of the outer cover, and the first yoke can be set to either of the two corner regions closer to the upper surface of the retainer.

[0060] The retainer may include: a protrusion that protrudes from a side surface of the retainer; and a groove formed in the protrusion, wherein a first magnet may be disposed in the groove of the retainer.

[0061] The outer cover may include a groove formed on the inner surface of the side plate of the outer cover, and at least a portion of the protruding portion of the retainer may be disposed in the groove of the outer cover.

[0062] The side plate of the outer cover includes a first portion of the outer cover with a groove and a second portion of the outer cover without a groove, and the second magnet can be disposed in the second portion of the outer cover.

[0063] The first yoke can be formed of a magnetic material.

[0064] The base includes a first side surface to a fourth side surface, the base includes a first portion disposed on the first side surface of the base, and each of the first coil and the second coil may include a coil disposed in the first portion of the substrate.

[0065] The first coil can move the retainer in a direction perpendicular to the optical axis, and the second coil can move the retainer and the outer cover in the optical axis direction.

[0066] The second side surface of the base is disposed on the opposite side of the first side surface of the base, the substrate includes a second portion disposed on the second side surface of the base, and the first coil and the second coil may each include a coil disposed in the second portion of the substrate.

[0067] The third side surface of the base is disposed on the opposite side of the fourth side surface of the base; 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 second coil is not disposed in the third and fourth portions of the substrate; and the first coil may include the coil disposed in the third and fourth portions of the substrate.

[0068] The camera module according to this embodiment may include: a printed circuit board; an image sensor disposed in the printed circuit board; a lens driving device disposed in the printed circuit board; and a lens coupled to a holder of the lens driving device.

[0069] The optical device according to this embodiment may include: a main body; a camera module disposed in the main body; and a display disposed in the main body and outputting at least one of an image and a video captured by the camera module.

[0070] The lens driving device according to this embodiment includes: a base; an outer cover disposed inside the base; a retainer disposed inside the outer cover; a first magnet disposed in the retainer; a second magnet disposed in the outer cover; a substrate disposed in the base; a first coil disposed in the substrate and facing the first magnet; a second coil disposed in the substrate and facing the second magnet; a first ball bearing in contact with the retainer and the outer cover; and a first yoke fixed to the outer cover and overlapping the first magnet in the optical axis direction, wherein the outer cover includes an upper plate and side plates extending from the upper plate, wherein the first ball bearing may be disposed between the upper surface of the retainer and the upper plate of the outer cover, and wherein the first yoke may be fixed to the upper plate of the outer cover.

[0071] Beneficial effects

[0072] This embodiment reduces the current consumed during autofocus drive and shaky correction drive compared to a spring-loaded drive.

[0073] Furthermore, even when using lenses with large diameters, autofocus drive and shaky correction drive can be performed without risking performance and reliability. Attached Figure Description

[0074] Figure 1 This is a perspective view of the lens driving device according to this embodiment.

[0075] Figure 2 From Figure 1 The cross-sectional view observed by AA in the image.

[0076] Figure 3 From Figure 1 The cross-sectional view observed along the BB line.

[0077] Figure 4 From Figure 1 The cross-sectional view observed by CC in the image.

[0078] Figure 5 From Figure 1 The cross-sectional view observed by DD in the image.

[0079] Figure 6 This is an exploded perspective view of the lens driving device according to this embodiment.

[0080] Figure 7 This is a perspective view of the components of the lens driving device according to this embodiment.

[0081] Figure 8 yes Figure 7 A magnified view of a portion of the area.

[0082] Figure 9 This is a perspective view of the second moving part of the lens driving device according to this embodiment.

[0083] Figure 10 It is shown Figure 9 The settings include a 3D view of the state of the first ball bearing.

[0084] Figure 11 This is a bottom view of the outer casing of the lens driving device according to this embodiment.

[0085] Figure 12 This is a perspective view of the outer casing of the lens driving device according to this embodiment.

[0086] Figure 13 This is a perspective view of the first moving part of the lens driving device according to this embodiment.

[0087] Figure 14 This is a perspective view of the first base of the lens driving device according to this embodiment.

[0088] Figure 15 This is a perspective view of the substrate and the arrangement structure of the first and second coils of the lens driving device according to this embodiment.

[0089] Figure 16 It was observed from another direction. Figure 15 A three-dimensional image.

[0090] Figure 17 This is a perspective view showing the second ball and related structure of the lens driving device according to this embodiment.

[0091] Figure 18 This is a cross-sectional view of some structures of the lens driving device according to this embodiment.

[0092] Figure 19 and Figure 20 This is a perspective view showing the state in which the cover member is omitted in the lens driving device according to this embodiment.

[0093] Figure 21 It was observed from above. Figure 19 A three-dimensional image.

[0094] Figure 22 This is a view used to explain the AF and OIS drives of the lens driving device according to this embodiment.

[0095] Figure 23 This is an exploded perspective view of the lens driving device according to the modified embodiment.

[0096] Figure 24 This is a perspective view of a portion of the structure of the lens driving device according to the modified embodiment.

[0097] Figure 25 yes Figure 24 A magnified view of a portion of the area.

[0098] Figure 26 This is a perspective view of a portion of the lens driving device according to a modified embodiment.

[0099] Figure 27 This is an exploded perspective view of the camera module according to this embodiment.

[0100] Figure 28 This is a perspective view of the optical device according to this embodiment. Detailed Implementation

[0101] Preferred embodiments of the invention will be described in detail below with reference to the accompanying drawings.

[0102] However, the technical concept of the present invention is not limited to the certain embodiments to be described, but can be implemented in various forms, and within the scope of the technical concept of the present invention, one or more constituent elements can be selectively combined or substituted among the embodiments.

[0103] Furthermore, unless explicitly defined and described, the terms (including technical and scientific terms) used in the embodiments of the present invention can be interpreted as having a meaning that can be generally understood by those skilled in the art, and commonly used terms (such as those defined in dictionaries) can be interpreted with reference to their meaning in the context of the relevant art.

[0104] Furthermore, the terminology used in this specification is for describing embodiments and is not intended to limit the invention.

[0105] In this specification, the singular form may include the plural form unless specifically stated in the statement, and when described as “at least one (or more than one) of A, B and C”, this may include one or more of all combinations that can be combined with A, B and C.

[0106] Furthermore, when describing components of embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are merely intended to distinguish some components from others, and they do not limit the nature, order, or sequence of the components.

[0107] Furthermore, when a component is described as being “connected,” “linked,” or “interconnected” to another component, the component is not only directly connected, linked, or interconnected to other components, but may also include situations where it is “connected,” “linked,” or “interconnected” due to other components between the other components.

[0108] Furthermore, when described as being formed or arranged "above" or "below" each component, "above" or "below" means not only that the two components are in direct contact, but also that one or more other components are formed or arranged between the two components. Additionally, when expressed as "above" or "below," it can include not only the upward direction based on a component, but also the downward direction based on a component.

[0109] As used below, “optical axis direction” is defined as the optical axis direction of the image sensor and / or lens connected to the lens drive device.

[0110] The term "vertical direction" as used below can refer to a direction parallel to the optical axis. The vertical direction can correspond to the "z-axis direction." The term "horizontal direction" as used below can refer to a direction perpendicular to the vertical direction. That is, the horizontal direction can be a direction perpendicular to the optical axis. Accordingly, the horizontal direction can include both the "x-axis direction" and the "y-axis direction."

[0111] The term "autofocus (AF) function" as used below is defined as follows: by moving the lens along the optical axis according to the distance to the object, the distance to the image sensor is adjusted to automatically focus on the object, enabling the image sensor to obtain a clear image of the object. "Autofocus" can also be interpreted as "AF (Autofocus)".

[0112] The “shake correction function” used below is defined as follows: moving or tilting the lens in a direction perpendicular to the optical axis to counteract vibrations (movements) caused by external forces in the image sensor. Furthermore, “shake correction” can be used interchangeably with “OIS (Optical Image Stabilization)” or “Optical Image Stabilization”.

[0113] In the following description, the lens driving device according to this embodiment will be described with reference to the accompanying drawings.

[0114] Figure 1 This is a perspective view of the lens driving device according to this embodiment; Figure 2 From Figure 1 The cross-sectional view observed by AA in the image; Figure 3 From Figure 1 A cross-sectional view observed along the BB line; Figure 4 From Figure 1 The cross-sectional view observed by CC in the image; Figure 5 From Figure 1 The cross-sectional view observed by DD in the image; Figure 6 This is an exploded perspective view of the lens driving device according to this embodiment; Figure 7 This is a perspective view of the components of the lens driving device according to this embodiment; Figure 8 yes Figure 7 Enlarged view of a portion of the area; Figure 9 This is a perspective view of the second moving part of the lens driving device according to this embodiment; Figure 10 It is shown Figure 9 The image shows a 3D view of the state of the first ball bearing. Figure 11 This is a bottom view of the outer casing of the lens driving device according to this embodiment; Figure 12 This is a perspective view of the outer casing of the lens driving device according to this embodiment; Figure 13 This is a perspective view of the first moving part of the lens driving device according to this embodiment;

[0115] Figure 14 This is a perspective view of the first base of the lens driving device according to this embodiment; Figure 15 This is a perspective view showing the arrangement structure of the substrate and the first and second coils of the lens driving device according to this embodiment; Figure 16 It was observed from another direction. Figure 15 A three-dimensional image; Figure 17 This is a perspective view of the second ball and related structure of the lens driving device according to this embodiment; Figure 18 This is a cross-sectional view of some structures of the lens driving device according to this embodiment; Figure 19 and Figure 20 This is a perspective view of the lens driving device with the cover component omitted, as described in this embodiment. Figure 21 It was observed from above. Figure 19 A three-dimensional image; and Figure 22 This is a view used to explain the AF and OIS drives of the lens driving device according to this embodiment.

[0116] The lens driving device 10 may include a stator 100. The stator 100 is movable by a first mover 200 and a second mover 300. The stator 100 may house the first mover 200 and the second mover 300. The stator 100 may be a portion that is relatively fixed when the first mover 200 and the second mover 300 move. The stator 100 may be a fixed portion.

[0117] 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 plate of the base, and the second base 160 may be a bottom plate of the base. The base may include four side surfaces. The base may include a first side surface to a fourth side surface.

[0118] The stator 100 may include a first base 110. The first base 110 may be disposed outside the outer casing 210. A first coil 130 and a second coil 140 may be disposed within the first base 110. The first base 110 may be disposed above a second base 160.

[0119] The first base 110 may include multiple side surfaces. The first base 110 may include a first side surface to a fourth side surface. A second side surface of the first base 110 may be disposed on the opposite side of the first side surface of the first base 110. A third side surface of the first base 110 may be disposed on the opposite side of the fourth side surface of the first base 110. In this case, the first side surface to the fourth side surface of the first base 110 may be the first side surface to the fourth side surface of the base.

[0120] The first base 110 may include protrusions 111. The protrusions 111 may protrude from a third side surface of the first base 110. The protrusions 111 may protrude from a fourth side surface of the first base 110. The protrusions 111 may include two protrusions spaced apart from each other in the optical axis direction. The protrusions 111 may be formed on an upper and lower portion of the side surface of the first base 110. The substrate 120 may be disposed between the two protrusions. The spacing between the two protrusions may correspond to the length of the substrate 120 in the corresponding direction.

[0121] The first base 110 may include a first hole 112. The first hole 112 may be hollow. The outer cover 210 may be disposed in the first hole 112. The first hole 112 may penetrate the first base 110 in the optical axis direction.

[0122] The first base 110 may include a second hole 113. The second hole 113 may be formed in 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 in 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.

[0123] The first base 110 may include a third hole 114. The third hole 114 may be formed in a position corresponding to the first-first coil 131 and the first-third coil 133. The first-first coil 131 and the first-third coil 133 may be disposed in the third hole 114. The third hole 114 may be formed in a position corresponding to the first-first magnet 321. The third hole 114 may penetrate the first base 110 in a direction perpendicular to the optical axis.

[0124] The first base 110 may include a fourth hole 115. The fourth hole 115 may be formed in 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 in 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.

[0125] The second base 160 may be disposed below the retainer 310. The second base 160 may be disposed below the first base 110. The second base 160 may be disposed below the retainer 310. The second base 160 may contact the outer cover 210. A lower stop for limiting downward movement of the outer cover 210 may be formed in the second base 160. The lower stop may be formed in the outer cover 210 to limit downward movement of the outer cover 210 by contacting the second base 160. The lower stop may be formed in any one or more of the outer cover 210 and the second base 160.

[0126] The lens driving device 10 may include a substrate 120. The stator 100 may include a substrate 120. The substrate 120 may be disposed in the base. The substrate 120 may be a flexible printed circuit board (FPCB). The substrate 120 may be formed to be flexible. The substrate 120 is integrally formed and can be bent. The substrate 120 may be configured to surround the outer peripheral surface of the base. The first coil 130 and the second coil 140 may be disposed in 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.

[0127] 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 portions 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.

[0128] 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: a first region 123-1, in which a first coil 130 is disposed; and a second region 123-2, extending from the first region 123-1 and disposed between 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 (reference) Figure 16 L1 in the figure can be greater than the length of the second region 123-2 of the substrate 120 (see reference). Figure 16 L2 in the middle.

[0129] 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: a first region 124-1 in which a first coil 130 is disposed; and a second region 124-2 extending from the first region 124-1 and disposed between 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 greater than the length of the second region 124-2 of the substrate 120.

[0130] In this embodiment, the first coil 130 and the second coil 140 can be disposed together in the first portion 121 of the substrate 120. At this time, the first coil 130 can be disposed next to the second coil 140. The first coil 130 can be disposed on one side of the first portion 120 of the substrate 120, and the second coil 140 can be disposed on the other side of the first portion 120 of the substrate 120. Alternatively, the first coil 130 and the second coil 140 can be disposed together in the third portion 123 of the substrate 120. Only the first coil 130 can 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 can be formed with different sizes. The number of windings of the first coil 130 and the second coil 140 can be different from each other. As a modified embodiment, the first coil 130 and the second coil 140 can have the same number of turns and can be formed with the same size.

[0131] 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 a coil in the first coil 130 that is disposed on a first imaginary plane. That is, the plurality of terminals of the substrate 120 may include two terminals electrically connected to the first-first coil 131 and the first-third coil 133. The plurality of terminals of the substrate 120 may include two terminals electrically connected to a coil in the first coil 130 that is disposed 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 first-second coil 132 and the first-fourth 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.

[0132] In a modified embodiment, the substrate 120 may include 15 terminals. In this case, the first Hall sensor 521 and the second Hall sensor 522 share one terminal, so the first Hall sensor 521 and the second Hall sensor 522 can be electrically connected to seven terminals.

[0133] 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 in the substrate 120. The first coil 130 may face the first magnet 320. The first coil 130 may move the holding member 310 in a direction perpendicular to the optical axis. The first coil 130 may be an OIS coil. When current is supplied to the first coil 130, an electromagnetic field may be formed around the first coil 130. Thus, the first coil 130 may electromagnetically interact with the first magnet 320.

[0134] The first coil 130 may include a coil disposed in a first portion 121 of the substrate 120. The first coil 130 may be disposed in the first portion 121 of the substrate 120. The first coil 130 may include a coil disposed in a second portion 122 of the substrate 120. The first coil 130 may be disposed in the second portion 122 of the substrate 120. The first coil 130 may include a coil disposed in a third portion 123 of the substrate 120. The first coil 130 may include a coil disposed in a 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.

[0135] As a modified embodiment, the first magnet 320 may be disposed on the first side surface of the base 110. In this case, the first coil 130 may be placed in the retainer 310. The first magnet 320 may include a magnet disposed on the first side surface of the base 110.

[0136] 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 respectively disposed in the first to fourth portions 121, 122, 123 and 124 of the substrate 120.

[0137] The first coil 130 may include a first-first coil 131 and a first-third coil 133. The first-first coil 131 and the first-third coil 133 may be OIS-x coils. That is, the first-first coil 131 and the first-third coil 133 may move the holding member 310 in a first direction (x-axis direction) perpendicular to the optical axis.

[0138] 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 holding member 310 in a second direction (y-axis direction) perpendicular to the optical axis direction and the first direction.

[0139] The first coil 131 can be a first unit coil. The first coil 132 can be a second unit coil. The first coil 133 can be a third unit coil. The first coil 134 can be a fourth unit coil.

[0140] 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 in the substrate 120. The second coil 140 may face the second magnet 220. The second coil 140 may move the holding member 310 and the outer cover 210 in the optical axis direction. The second coil 140 may be an AF coil. When current is supplied to the second coil 140, an electromagnetic field can be formed around the second coil 140. Thus, the second coil 140 may electromagnetically interact with the second magnet 220.

[0141] The second coil 140 may include a coil disposed in a first portion 121 of the substrate 120. The second coil 140 may be disposed in the first portion 121 of the substrate 120. The second coil 140 may include a coil disposed in a second portion 122 of the substrate 120. The second coil 140 may not be disposed in 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.

[0142] As a modified embodiment, the second magnet 220 may be disposed on the first side surface of the base 110. In this case, the second coil 140 may be disposed within the outer casing 210. The second magnet 220 may include a magnet disposed on the first side surface 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 second-first coil 141 and a second-second coil 142. The second-first coil 141 may be disposed in the first portion 121 of the substrate 120. The second-second coil 142 may be disposed in the second portion 122 of the substrate 120.

[0143] The second-first coil 141 can be a first unit coil. The second-second coil 142 can be a second unit coil.

[0144] The lens driving device 10 may include a second yoke 150. The stator 100 may include a second yoke 150. The second yoke 150 may be formed of a magnetic material. The second yoke 150 may be disposed in the substrate 120. The second yoke 150 may overlap with the second magnet 220 in a direction perpendicular to the optical axis. The second yoke 150 may be formed of 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 closer to the second yoke 150. Thus, the outer cover 210 may press the second ball 420 toward the base. That is, the contact between the outer cover 210 and the second ball 420, as well as the contact between the base and the second ball 420, can be maintained by the attractive force between the second magnet 220 and the second yoke 150.

[0145] 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 configured to surround the base. The cover member 170 may be configured to cover the substrate 120. The substrate 120 may be disposed on the inner surface of the side plate 172 of the cover member 170. The cover member 170 may include a "canister". The cover member 170 may be a non-magnetic material. The cover member 170 may be formed of metal. The cover member 170 may be formed of a metal plate. The cover member 170 may be connected to the ground portion of the printed circuit board 50. Thus, the cover member 170 may be grounded. The cover member 170 may block electromagnetic interference (EMI). In this case, the cover member 170 may be referred to as an "EMI shielding can".

[0146] The cover member 170 may include an upper plate 171 and a side plate 172. The cover member 170 may include an upper plate 171 and a side plate 172 extending from the upper plate 171. The side plate 172 of the cover member 170 may be coupled to a base. The cover member 170 may include an upper plate 171 having holes and a side plate 172 extending downward from the outer periphery or edge of the upper plate 171. The side plate 172 may include multiple side plates. The side plate 172 may include four side plates.

[0147] The lens driving device 10 may include a mover. The mover may include a first mover 200 and a second mover 300. The mover can be configured to move relative to a fixed portion. The mover may include an outer cover 210 and a retainer 310.

[0148] The lens driving device 10 may include a first mover 200. The first mover 200 may be disposed inside the fixed portion 100. The first mover 200 may be movably disposed inside the stator 100. The first mover 200 may move relative to the stator 100 in the optical axis direction. In this case, the second mover 300 may move together with the first mover 200. The first mover 200 may be movable for AF driving. The first mover 200 may be an AF mover.

[0149] The lens driving device 10 may include an outer cover 210. The first mover 200 may include the outer cover 210. The outer cover 210 may be disposed inside the base. The outer cover 210 may be disposed outside the retainer 310. The outer cover 210 may house the retainer 310 therein. The second magnet 220 may be disposed in the outer cover 210. The outer cover 210 may be movable in the optical axis direction. The outer cover 210 may be movable during AF driving. The outer cover 210 may be movable in the vertical direction relative to the base 110.

[0150] The outer cover 210 may include an upper plate 211. The upper plate 211 may be disposed above the retainer 310. The first ball bearing 410 may be disposed in the upper plate 211. The first ball bearing 410 may contact the upper plate 211.

[0151] The outer cover 210 may include side panels 212. The side panels 212 may extend from the upper panel 211. The side panels 212 may extend downward from the outer periphery of the upper panel 211. The side panels 212 may include multiple side panels. The side panels 212 may include four side panels.

[0152] The outer cover 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 receiving groove. The groove 213 may contact the first ball 410. The groove 213 may be formed such that the first ball 410 cannot be separated. 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 outer cover 210.

[0153] The outer cover 210 may include a groove 214. The groove 214 may accommodate at least a portion of the protrusion 312 of the retainer 310. The groove 214 may be formed on the inner surface of the side plate 212 of the outer cover 210. The thickness of the portion of the side plate 212 of the outer cover 210 with the groove 214 may be less than the thickness of the portion without the groove 214.

[0154] The outer cover 210 may include a protrusion 215. The protrusion 215 may contact the second ball 420. The protrusion 215 may protrude from the outer surface of the outer cover 210. The protrusion 215 may protrude outward from the side plate 212 of the outer cover 210. The second ball 420 may be disposed between the protrusion 215 of the outer cover 210 and the base. The protrusion 215 may include a first surface that contacts the second ball 420. The protrusion 215 may include multiple protrusions. The second ball 420 may be disposed at each of the multiple protrusions of the outer cover 210. The multiple protrusions of the outer cover 210 may be symmetrically arranged with respect to the optical axis. In this case, the multiple second balls 420 disposed in the multiple protrusions may be symmetrical with respect to the optical axis. However, because the second balls 420 are movable, asymmetrical torques may occur among the multiple second balls 420. A groove accommodating at least a portion of the second ball 420 may be formed in the protrusion 215. The groove of the protruding part 215 can be set symmetrically with respect to the optical axis.

[0155] The outer cover 210 may include a hole 216. The hole 216 may be hollow. The hole 216 may penetrate the outer cover 210 in the optical axis direction.

[0156] The outer cover 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 the upper surface of the upper plate 211 of the outer cover 210. The groove 217 may be formed in 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 less than the thickness of the first yoke 230. In this case, a portion of the first yoke 230 disposed in the groove 217 may protrude more than the upper surface of the upper plate 211 of the outer cover 210.

[0157] The outer cover 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 receiving groove. The groove 218 may be formed with a shape and size corresponding to the shape and size of the second magnet 220. The groove 218 may be formed by recessing it on the outer surface of the outer cover 210.

[0158] 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 within the outer casing 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 surface of the outer casing 210. The second magnet 220 may be biased toward one of two corners of the side surface of the outer casing 210.

[0159] The second magnet 220 may include a magnet facing the second coil 140 disposed in the first portion 121 of the substrate 120. The second magnet 220 may include a second-first magnet facing the second-first coil 141. The second magnet 220 may face the second-first 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 in the second portion 122 of the substrate 120. The second magnet 220 may include a second-second magnet facing the second-second coil 142. The second magnet 220 may face the second-second coil 142. The second magnet 220 may include a magnet facing the second portion 122 of the substrate 120.

[0160] The second magnet 220 may include multiple magnets. The second magnet 220 may include two magnets. The second magnet 220 may include two magnets respectively disposed on two opposite side surfaces of the outer casing 210. The second magnet 220 may include a second-first magnet and a second-second magnet. The second-first magnet may be disposed on a first side surface of the outer casing 210, and the second-second magnet may be disposed on a second side surface of the outer casing 210 opposite to the first side surface. The second-first magnet faces the second-first coil 141, and the second-second magnet may face the second-second coil 142.

[0161] The second-first magnet can be a first unit magnet. The second-second magnet can be a second unit magnet.

[0162] The lens driving device 10 may include a first yoke 230. The first mover 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 metal. The first yoke 230 may be disposed on the upper surface of the outer cover 210. The first yoke 230 may overlap with the first magnet 320 and the first ball 410 in the optical axis direction. The first yoke 230 may be formed of 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 closer to the first yoke 230. Thus, the retainer 310 may press the first ball 410 toward the upper plate 211 of the outer cover 210. That is, the contact between the retainer 310 and the first ball 410 and the contact between the outer cover 210 and the first ball 410 may be maintained by the attractive force between the first magnet 320 and the first yoke 230.

[0163] In a modified embodiment, the first yoke 230 may be disposed on the lower surface of the upper plate 211 of the outer cover 210. In this case, the first ball 410 may move along the lower surface of the first yoke 230. To prevent attraction between the first ball 410 and the first yoke 230, the first ball 410 may be formed of a non-metallic material.

[0164] The lens driving device 10 may include a second mover 300. The second mover 300 may be disposed inside the stator 100. The second mover 300 may be movably disposed inside the first stator 100. The second mover 300 may be disposed inside the stator 100. The second mover 300 may be movably disposed inside the first mover 200. The second mover 300 may move relative to the stator 100 and the first mover 200 in a direction perpendicular to the optical axis. The second mover 300 may be movable for OIS driving. The second mover 300 may be an OIS mover.

[0165] The lens driving device 10 may include a retainer 310. The second mover 300 may include a retainer 310. The retainer 310 may be disposed inside the outer casing 210. The retainer 310 may be disposed inside the base. The retainer 310 may be disposed inside the cover member 170. The retainer 310 may be coupled to the lens. The first magnet 320 may be disposed in the retainer 310. The retainer 310 may move during OIS driving. Even during AF driving, the retainer 310 may move together with the outer casing 210. The retainer 310 may move horizontally relative to the outer casing 210.

[0166] The retainer 310 may include a first side surface and a second side surface disposed on opposite sides of each other, as well as a third side surface and a fourth side surface disposed on opposite sides of each other.

[0167] The retainer 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 receiving groove. The groove 311 may contact the first ball 410. The groove 311 may be formed such that the first ball 410 can remain in contact. 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 retainer 310.

[0168] The retainer 310 may include a protrusion 312. The first magnet 320 may be disposed in the protrusion 312. The protrusion 312 may protrude from the outer surface of the retainer 310. A groove for housing the first magnet 320 may be formed in the protrusion 312. At least a portion of the protrusion 312 may be disposed in a groove 214 formed on the inner circumferential surface of the outer cover 210.

[0169] The retainer 310 may include a hole 313. The hole 313 may be hollow. A lens may be disposed in the hole 313. The groove 313 may penetrate the retainer 310 in the optical axis direction.

[0170] The lens driving device 10 may include a first magnet 320. The second mover 300 may also include the first magnet 320. The first magnet 320 may be disposed within the retainer 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 surface of the retainer 310. The first magnet 320 may be positioned at a corner offset from the side surface of the retainer 310.

[0171] The first magnet 320 may include a magnet facing the first coil 130, the magnet being disposed in a first portion 121 of the substrate 120. The first magnet 320 may include a magnet facing the first coil 131. The first magnet 320 may face the first 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.

[0172] 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 first-first magnet 321 and a first-second magnet 322. The first-first magnet 321 may be an OIS-x magnet. The first-second magnet 322 may be an OIS-y magnet. The first-first magnet 321 may include a magnet facing the first-first coil 131 and a magnet facing the first-third coil 133. The first-second magnet 322 may include a magnet facing the first-second coil 132 and a magnet facing the first-fourth coil 134. The first magnet 320 may include four magnets, which are respectively disposed on the four side surfaces of the retainer 310.

[0173] The lens driving device 10 may include a first ball 410. The first ball 410 may contact the retainer 310 and the outer cover 210. The first ball 410 may be disposed between the retainer 310 and the outer cover 210. The first ball 410 may be disposed on the upper surface of the retainer 310. The first ball 410 may contact the lower surface of the upper plate 211 of the outer cover 210. The first ball 410 may guide the retainer 310 to move relative to the outer cover 210 in a direction perpendicular to the optical axis. The first ball 410 may guide the OIS drive of the retainer 310. The first ball 410 may be an OIS ball. The first ball 410 may be formed in a spherical shape. Metal may be disposed in one or more of the outer cover 210 and the retainer 310 that contact the first ball 410. The outer cover 210 and the retainer 310 may be formed of an injection-molded material. In this case, intrusion through the first ball 410 may occur in the outer cover 210 and the retainer 310. To improve this, metal can be inserted into one or more of the outer casing 210 and the retainer 310, or separate metal can be coupled or provided. That is, the first ball 410 can move by contacting the metal provided in the outer casing 210 and the retainer 310.

[0174] In this embodiment, the first ball 410 can be configured as a single-layer structure. In other words, the ball guided in the OIS-X direction and the ball guided in the OIS-Y direction can be arranged on a virtual plane. Therefore, the groove 311 of the retainer 310 can be formed such that the plurality of balls arranged on the virtual plane can be guided in both the OIS-X and OIS-Y directions. Similarly, the groove 213 of the outer cover 210 can also be formed such that the plurality of balls arranged on the virtual plane can be guided in both the OIS-X and OIS-Y directions. The groove 311 of the retainer 310 and the groove 213 of the outer cover 210 can be larger than the size of the first ball 410. As a modified embodiment, one or more of the groove 311 of the retainer 310 and the groove 213 of the outer cover 210 can be omitted. That is, only the groove 311 of the retainer 310 can be formed, and the groove 213 of the outer cover 210 can not be formed. Conversely, the groove 213 of the outer cover 210 can be formed, and the groove 311 of the retainer 310 can be omitted. Alternatively, the groove 311 of the retainer 310 and the groove 213 of the outer cover 210 can be omitted.

[0175] The first ball 410 may include a plurality of first balls. The first ball 410 may include four balls. In this case, the imaginary plane connecting the centers of the four balls may be perpendicular to the optical axis. The plurality of first balls may have the same dimensions as each other.

[0176] The lens driving device 10 may include a second ball 420. The second ball 420 may contact the outer housing 210 and the base. The second ball 420 may be disposed between the outer housing 210 and the base. The second ball 420 may be disposed in a protrusion 215 of the outer housing 210. The outer housing 210 may include a groove formed in the protrusion 215 to receive at least a portion of the second ball 420. The second ball 420 may be disposed in the base. The base may include a groove receiving at least a portion of the second ball 420. The second ball 420 may guide the outer housing 210 to move relative to the base in the optical axis direction. The second ball 420 may guide the AF drive of the outer housing 210. The second ball 420 may be an AF ball. The second ball 420 may be formed in a spherical shape.

[0177] The second ball 420 may include a plurality of second balls. The second ball 420 may include two balls arranged symmetrically about the optical axis. The second ball 420 may include six balls. In this case, three second balls 420 may be arranged in a diagonal corner region on one side of the corner region. The imaginary plane connecting the plurality of second balls may have an optical axis or may be parallel to the optical axis.

[0178] The lens driving device 10 may include a driver IC 510. The driver IC 510 may include a Hall element for detecting the second magnet 220. The Hall element can detect the second magnet 220. The Hall element is capable of detecting the magnetic force of the second magnet 220. The Hall element can detect one or more of the position and movement of the second magnet 220. The Hall element can detect one or more of the position and movement of the outer cover 210 and the retainer 310 in the optical axis direction. The values ​​detected by the Hall element can be used for feedback of the AF drive.

[0179] The driver IC 510 can be disposed in the substrate 120. The driver IC 510 can be disposed in a first portion 121 of the substrate 120. The driver IC 510 can be electrically connected to the second coil 140. The driver IC 510 can control the current applied to the second coil 140. The driver IC 510 can supply current to the second coil 140.

[0180] The lens driving device 10 may include a capacitor 511. The capacitor 511 can be provided if a large voltage is applied to the driver IC 500 or if the voltage suddenly drops. The capacitor 511 can be connected to an external power supply. The external power supply can enter the driver IC 500 through the capacitor 511. In this case, the capacitor 511 and the driver IC 500 can be connected in series.

[0181] The lens driving device 10 may include a Hall sensor 520. The Hall sensor 520 may be disposed in the substrate 120. The Hall sensor 520 can detect a first magnet 320. The Hall sensor 520 can detect the magnetic force of the first magnet 320. The Hall sensor 520 can detect the position and movement of one or more of the first magnet 320.

[0182] The Hall sensor 520 may include multiple Hall sensors. The Hall sensor 520 may include two Hall sensors. Thus, the Hall sensor 520 can detect at least one of position and amount of movement in two axial directions (x-axis and y-axis) perpendicular to the optical axis direction of the outer casing 210. The values ​​detected by the Hall sensor 520 can be used for feedback of the OIS drive.

[0183] The Hall sensor 520 may include a first Hall sensor 521 and a second Hall sensor 522. The first Hall sensor 521 detects movement of the retainer 310 in a first direction perpendicular to the optical axis. The second Hall sensor 522 detects movement of the retainer 310 in both the optical axis direction and a second direction perpendicular to the first direction.

[0184] 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 retaining member 310. The driving unit may include a first driving unit and a second driving unit. The first driving unit can move the retaining member 310. The first driving unit can move the outer cover 210. The first driving unit may include a first coil 130 and a first magnet 320. The second driving unit can move the retaining member 310 and the outer cover 210 together. The second driving unit may include a second coil 140 and a second magnet 220.

[0185] 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. Each of the first and second driving units may be disposed on two facing side surfaces of the four side surfaces of the base 110. The second driving unit may be disposed on the remaining two side surfaces of the base 110. The first driving unit may be disposed on two facing side surfaces of the four side surfaces of the base 110. The second driving unit may be disposed on all four side surfaces of the base 110.

[0186] This embodiment may include an AF structure in which an AF drive unit is supported diagonally, the AF drive unit and the fixed part are attached to each other by the attraction between each yoke and magnet, and a plurality of balls are positioned between the AF drive unit and the fixed part. Here, the AF drive unit may be a first mover 200, and the fixed part may be a stator 100.

[0187] This embodiment may include the following structure: jitter is corrected by driving magnets, the retainer 310 is located inside the AF drive unit and positioned diagonally on the inner side of the AF drive unit, and the coils face them in a direction perpendicular to the optical axis. In this case, in the OIS drive unit, an attraction is generated between one or more yokes located on the upper surface of the outer casing 210 and the magnets facing the one or more yokes, and a ball may be located between the one or more yokes and the magnets. Furthermore, this embodiment may include the following structure: multiple grooves are formed on the same surface in each direction for movement in the X / Y directions.

[0188] The first drive unit can move the outer cover 210. The second drive unit can move the retainer 310. A portion of the first drive unit can be disposed on a first side surface and a third side surface of the base 110 facing each other. The second drive unit may include a first unit drive unit partially disposed on the first side surface of the base 110 and a second unit drive unit partially disposed on a fourth side surface of the base 110. The first unit drive unit and the second unit drive unit can move the retainer 310 in different directions. Another portion of the first drive unit can be disposed on the third side surface of the base 110. Another portion of the second unit drive unit can be disposed on the second side surface of the base 110 facing the fourth side surface. The first unit drive unit disposed on the first side surface and the third side surface of the base 110 may be a first unit coil. There are at least two first unit coils, one of which may be disposed on the first side surface and the other on the third side surface. A first unit magnet may be disposed corresponding to the first unit coil. There are at least two first unit magnets, and they may be coupled to the retainer 310. The first driving unit disposed on the first and third side surfaces of the base 110 may be a first coil 130. The first driving unit may include a first magnet 320 corresponding to the first coil 130 and connected to the outer casing 210.

[0189] 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.

[0190] The driving unit may include: a first unit driving unit, which includes a first unit coil or a first unit magnet disposed on a first side surface of the base 110; and a second unit driving unit, which includes a second unit coil or a second unit magnet disposed on a fourth side surface of the base 110. The first unit driving unit and the second unit driving unit can move the retainer 310 in different directions. The base 110 may include: a first corner (or edge) where the first side surface and the fourth side surface meet; and a fourth corner where the third side surface and the fourth side surface meet. There may be multiple first unit coils and multiple second unit coils. One of the multiple first unit coils and one of the multiple second unit coils may be positioned closer to the first corner than to the fourth corner. The base 110 may include a third corner in a direction diagonally opposite to the first corner. Another of the multiple first unit coils and another of the multiple second unit coils may be positioned closer to the third corner than to the fourth corner.

[0191] The lens driving device 10 according to this embodiment can follow the following process sequence: assembling the OIS unit, and then assembling the base and cover member 170.

[0192] In this embodiment, the ball guide structure for AF driving can be located diagonally. The balls can be brought into close contact with the ball guide unit by the attractive force between the moving magnet and the yoke. This can include a structure where the attractive force acts in both directions and the balls are driven in close contact.

[0193] In this embodiment, OIS driving can be performed while the OIS driving magnet is in close contact with the ball via the attraction force of the yoke located on the upper side of the outer casing 210. This can be achieved by forming a ball guide groove that is movable in a direction perpendicular to each other, the ball guide groove being positioned between the inner top surface of the outer casing 210 and the upper surface of the retainer 310 and being constructed on the same plane.

[0194] In this embodiment, multiple OIS magnets and coils can be arranged diagonally.

[0195] 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) through the electromagnetic interaction between the second coil 140 and the second magnet 220. At this time, the outer cover 210 and the retainer 310 can move upward together with the second magnet 220 (see...). Figure 22 (AF).

[0196] When a reverse current is applied to the second coil 140, the second magnet 220 can move downward along the optical axis through the electromagnetic interaction between the second coil 140 and the second magnet 220. At this time, the outer cover 210 and the retainer 310 can move downward together with the second magnet 220 (see...). Figure 22 (AF).

[0197] When current is applied to the first-first coil 131 and the first-third coil 133, the first-first magnet 321 can move in a first direction (x-axis direction) perpendicular to the optical axis through the electromagnetic interaction between the first-first coil 131, the first-third coil 133 and the first-first magnet 321. At this time, the holding member 310 can also move together with the first-first magnet 321 in the first direction (see...). Figure 22 (OIS X in the text). However, when current is applied to the first-first coil 131, the retainer 310 moves to one side of the x-axis, and when current is applied to the first-third coil 133, the retainer 310 can be controlled to move to the other side of the x-axis. Alternatively, when a positive current is applied to the first-first coil 131 and the first-third coil 133, the retainer 310 moves to one side of the x-axis, and when a reverse current is applied to the first-first coil 131 and the first-third coil 133, the retainer 310 can be controlled to move to the other side of the x-axis. The first-first coil 131 and the first-third coil 133 can be electrically isolated and controlled. Alternatively, the first-first coil 131 and the first-third coil 133 can be electrically connected.

[0198] When current is applied to the first-second coil 132 and the first-fourth coil 134, through the electromagnetic interaction between the first-second coil 132, the first-fourth coil 134, and the first-second magnet 322, the first-second magnet 322 can move in a second direction (y-axis direction) perpendicular to both the optical axis and the first direction. At this time, the retaining member 310 can also move together with the first-second magnet 322 in the second direction (see...). Figure 22 (OIS Y in the text). However, when current is applied to the first-second coil 132, the retainer 310 moves to one side of the y-axis; and when current is applied to the first-fourth coil 134, the retainer 310 can be controlled to move to the other side of the y-axis. Alternatively, when a positive current is applied to the first-second coil 132 and the first-fourth coil 134, the retainer 310 moves to one side of the y-axis; and when a reverse current is applied to the first-second coil 132 and the first-fourth coil 134, the retainer 310 can be controlled to move to the other side of the y-axis. The first-second coil 132 and the first-fourth coil 134 can be electrically isolated and controlled. Alternatively, the first-second coil 132 and the first-fourth coil 134 can be electrically connected.

[0199] In the following description, a camera module according to a modified embodiment will be described with reference to the accompanying drawings.

[0200] Figure 23 This is an exploded perspective view of the lens driving device according to the modified embodiment; Figure 24 This is a perspective view of a portion of the lens driving device according to a modified embodiment; Figure 25 yes Figure 24 Enlarged view of a portion of the area; and Figure 26 This is a perspective view of a portion of the lens driving device according to a modified embodiment.

[0201] In the following description, the construction of the camera module according to the modified embodiment will focus on the differences from the camera module according to this embodiment. The description of the corresponding construction of the camera module according to this embodiment can be similarly applied to constructions not described below.

[0202] The lens driving device 10 may include a guide portion. The guide portion may be disposed between the retainer 310 and the outer cover 210. The guide portion may include a retainer (first yoke 230a) comprising a hole 231 and a first ball bearing 410 disposed within the hole 231. The guide portion may be configured to overlap with the retainer 310 and the outer cover 210 in the optical axis direction. The retainer may be coupled to either the retainer 310 or the outer cover 210. The first ball bearing 410 may move or roll in a direction perpendicular to the optical axis. The retainer may function as a yoke. The retainer may be magnetic. An attractive force may act between the retainer and the first magnet 320.

[0203] The lens driving device 10 may include a first yoke 230a. The first yoke 230a may be a "fixer". The first mover 200 may include the first yoke 230a. The first yoke 230a may be formed of a magnetic material. The first yoke 230a may be formed of metal. The first yoke 230a may be fixed to the outer cover 210. The first yoke 230a may be coupled to the outer cover 210. The first yoke 230a may be positioned below the upper plate 211 of the outer cover 210. The first yoke 230a may be positioned on the lower surface of the upper plate 211 of the outer cover 210. The first yoke 230a may be fixed to the lower surface of the upper plate 211 of the outer cover 210. The first yoke 230a may be positioned closer to one of two corner regions of the upper surface of the retainer 310. The first yoke 230a may overlap with the first magnet 320 in the optical axis direction. The first yoke 230a may be formed of metal. An attractive force may act between the first yoke 230a and the first magnet 320. The first yoke 230a can attract the first magnet 320. The first magnet 320 can move closer to the first yoke 230a. As a result, the retainer 310 can press the first ball 410 toward the upper plate 211 of the outer cover 210. That is, the contact between the retainer 310 and the first ball 410, as well as the contact between the outer cover 210 and the first ball 410, can be maintained by the attraction between the first magnet 320 and the first yoke 230a.

[0204] In this embodiment, the cross section of the first yoke 230a can be approximately shaped like the letter U or a rotated letter. The shape is such that the two ends of the first yoke 230a can be connected to the outer cover 210. As a modified embodiment, the cross-section of the first yoke 230a can be approximately formed in an inverted U-shape. In this case, the two ends of the first yoke 230a can be connected to the retainer 310.

[0205] In this embodiment, the first magnet 320 includes: a first magnet 321 disposed on a first side surface of the retainer 310; a first magnet 322 disposed on a second side surface of the retainer 310; a first magnet 323 disposed on a third side surface of the retainer 310; and a first magnet 324 disposed on a fourth side surface of the retainer 310.

[0206] The first magnet 321 can be a first unit magnet. The first second magnet 322 can be a second unit magnet. The first third magnet 323 can be a third unit magnet. The first fourth magnet 324 can be a fourth unit magnet.

[0207] At this time, the first yoke 230a may include: a first yoke 230-1, which overlaps with the first magnet 321 in the optical axis direction; a first second yoke 230-2, which overlaps with the first magnet 322 in the optical axis direction; a first third yoke 230-3, which overlaps with the first magnet 323 in the optical axis direction; and a first fourth yoke 230-4, which overlaps with the first magnet 324 in the optical axis direction. The first yoke 230a may include multiple first yokes. The first yoke 230a may include four first yokes.

[0208] The first yoke 230a may include a hole 231. A first ball bearing 410 may be disposed in the hole 231 of the first yoke 230a. The first ball bearing 410 may be rotatably disposed in the hole 231 of the first yoke 230a. The diameter of the hole 231 of the first yoke 230a may correspond to or be larger than the diameter of the first ball bearing 410. The hole 231 of the first yoke 230a may be formed in the connecting plate 233. The three holes 231 of the first yoke 230a may be formed at equal intervals in each of the first to fourth yokes 230-1, 230-2, 230-3, and 230-4.

[0209] 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 outer cover 210. The first yoke 230a may include a connecting plate 233 that connects the two side plates 232 to each other. The connecting plate 233 of the first yoke 230a may overlap with the center of the first ball 410 in a direction perpendicular to the optical axis.

[0210] In this embodiment, the first ball 410 can be rotatably disposed in the hole 231 of the first yoke 230a.

[0211] The guide portion may include a retainer comprising a first ball, a second ball, a first hole for receiving the first ball, and a second hole for receiving the second ball. The first ball can rotate in the first hole, and the second ball can rotate in the second hole. The second drive unit may include: a first unit drive unit for driving the retainer 310 in a first direction via the first ball and the second ball; and a second unit drive unit for driving the retainer 310 in a second direction different from the first direction via the first ball and the second ball. The first ball and the second ball may be spaced apart by the first hole and the second hole. 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. Alternatively, when the diameter of the first ball and the second ball is greater than the diameter of the ball, the distance between the first ball and the second ball may be less than the distance between the first hole and the second hole.

[0212] In the following description, the camera module according to this embodiment will be described with reference to the accompanying drawings.

[0213] Figure 27 This is an exploded perspective view of the camera module according to this embodiment.

[0214] A camera module can be a camera device.

[0215] The camera module may include a lens module 20. The lens module 20 may include at least one lens. The lens may be positioned corresponding to the image sensor 60. The lens module 20 may include a lens and a lens barrel. The lens module 20 may be coupled to the coil holder 210 of the lens drive device 10. The lens module 20 may be coupled to the coil holder 210 by screws and / or adhesive. The lens module 20 may move integrally with the coil holder 210.

[0216] The camera module may include a filter 30. The filter 30 can be used to block light of a specific frequency band passing through the lens module 20 from entering the image sensor 60. The filter 30 can be configured to be parallel to the xy plane. The filter 30 can be disposed between the lens module 20 and the image sensor 60. The filter 30 can be disposed in the sensor base. The filter 30 may include an infrared filter. The infrared filter can block light in the infrared region from incident on the image sensor 60. The infrared filter may include an infrared reflection filter or an infrared absorption filter.

[0217] The camera module may include a sensor base. The sensor base may be disposed between the lens drive unit 10 and the printed circuit board 50. The sensor base may include a protrusion where a filter 30 is disposed. An opening may be formed in the portion of the sensor base where the filter 30 is disposed, allowing light passing through the filter 30 to enter the image sensor 60. An adhesive member may be disposed between the sensor base and the lens drive unit 10. The adhesive member attaches the lens drive unit 10 to the upper surface of the sensor base. The adhesive member may be configured to prevent foreign objects from entering the lens drive unit 10. The adhesive member may include any one or more of epoxy resin, thermosetting adhesive, and UV-curable adhesive.

[0218] The camera module may include a printed circuit board (PCB) 50. The PCB 50 may be a substrate or a circuit board. A lens drive unit 10 may be disposed within the PCB 50. A sensor base may be disposed between the PCB 50 and the lens drive unit 10. The PCB 50 may be electrically connected to the lens drive unit 10. An image sensor 60 may be disposed within the PCB 50. The PCB 50 may include various circuits, components, and control units to convert the image formed at the image sensor 60 into electrical signals and transmit them to external devices.

[0219] The camera module may include an image sensor 60. The image sensor 60 may be configured such that light passing through a lens and filter 30 is incident on the image sensor 60 to form an image. 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 connected to the printed circuit board 50 using surface mount technology (SMT). As another example, the image sensor 60 may be connected to the printed circuit board 50 using flip-chip technology. The image sensor 60 may be configured such that its optical axis coincides with that of the lens. That is, the optical axis of the image sensor 60 and the optical axis of the lens may be aligned. The image sensor 60 may convert light incident on its effective image area into an electrical signal. The image sensor 60 may be any of a charge-coupled device (CCD), metal-oxide-semiconductor (MOS), CPD, and CID.

[0220] The camera module may include a motion sensor 70. The motion sensor 70 may be mounted on a printed circuit board 50. The motion sensor 70 may be electrically connected to a control unit 80 via a circuit pattern provided on the printed circuit board 50. The motion sensor 70 may output rotational angular velocity information caused by the movement of the camera module. The motion sensor 70 may include a 2-axis or 3-axis gyroscope sensor or an angular velocity sensor.

[0221] The camera module may include a control unit 80. The control unit 80 may be disposed in a printed circuit board 50. The control unit 80 may be electrically connected to the coil 130 of the lens drive device 10. The control unit 80 may independently control the direction, intensity, and amplitude of the current supplied to the coil 130. The control unit 80 may perform an autofocus function by controlling the lens drive device 10. The control unit 80 may be electrically connected to a Hall sensor 140. The control unit 80 may detect the position of the mover 200 through the Hall sensor 140 and perform autofocus feedback control on the lens drive device 10.

[0222] The camera module may include a connector 90. The connector 90 may be electrically connected to a printed circuit board 50. The connector 90 may include a port for electrical connection to an external device.

[0223] In the following description, the optical device according to this embodiment will be described with reference to the accompanying drawings.

[0224] Figure 28 This is a perspective view of the optical device in this embodiment.

[0225] Optical devices include mobile phones, portable phones, smartphones, portable communication devices, portable smart devices, portable terminals, digital cameras, computers, laptops, digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), and navigation devices. However, the types of optical devices are not limited to these, and any device used for capturing video or photographs may be included in optical devices.

[0226] The optical device may include a body 1. The body 1 may form the appearance of the optical device. The body 1 is capable of accommodating a camera module 2. A display 3 may be disposed on a first surface of the body 1. As an example, the display 3 and the camera module 2 are disposed on the first surface of the body 1, and the camera module 2 may be additionally disposed on a second surface of the body 1 on the opposite side of the first surface.

[0227] The optical device may include a camera module 2. The camera module 2 may be disposed within the body 1. At least a portion of the camera module 2 may be housed within the body 1. Multiple camera modules 2 may be provided. The camera module 2 may include a dual-camera module, a triple-camera module, or more camera modules. The camera module 2 may be disposed at each of a first surface of the body 1 and a second surface of the body 1 opposite to the first surface. The camera module 2 can capture images and / or videos of an object.

[0228] The optical device may include a display 3. The display 3 may be disposed within 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.

[0229] Although embodiments of the invention have been described above with reference to the accompanying drawings, those skilled in the art will understand that the invention can be implemented in other specific forms without altering its technical spirit or essential characteristics. Therefore, it should be understood that the above embodiments are illustrative in all respects and not restrictive.

Claims

1. A lens driving device, comprising: Fixed part; An outer cover and a retainer, the outer cover and the retainer being configured to move relative to the fixed portion; A first drive unit, configured to move the retainer; A second drive unit is configured to move the outer casing in the optical axis direction; A first ball bearing is disposed between the retainer and the outer cover; as well as A metal component, wherein the metal component is disposed on at least one of the outer cover and the retainer. The first driving unit includes a first-first coil and a first-second coil. The first-first coil is configured to move the retainer in a first direction perpendicular to the optical axis, and the first-second coil is configured to move the retainer in a second direction perpendicular to both the optical axis and the first direction. The first ball is configured to guide the movement of the retainer relative to the outer casing in both the first and second directions. The first ball is in contact with the metal component.

2. The lens driving apparatus according to claim 1, wherein The first driving unit includes a first coil and a first magnet. Wherein, the first coil includes the first-first coil and the first-second coil, and The second driving unit includes a second coil and a second magnet.

3. The lens driving apparatus according to claim 2, wherein The first coil and the second coil are disposed on the first side surface of the fixed portion.

4. The lens driving device according to claim 2, wherein, The metal component is inserted into at least one of the outer cover and the retainer.

5. The lens driving device according to claim 2, wherein, The fixing part includes a base and a base plate disposed on the base. The base includes a first side surface to a fourth side surface, and The substrate includes a first portion disposed on the first side surface of the base.

6. The lens driving device according to claim 1, wherein, The metal components include a first metal component and a second metal component, the first metal component being disposed on the outer cover, and the second metal component being disposed on the retainer. The first ball is in contact with the first metal component and the second metal component.

7. The lens driving device according to claim 5, wherein, The second side surface of the base is located on the opposite side of the first side surface of the base. The substrate includes a second portion disposed on the second side surface of the base, and Each of the first coil and the second coil includes a coil disposed on the second portion of the substrate.

8. The lens driving device according to claim 7, wherein, The third side surface of the base is disposed on the opposite side of the fourth side surface of the base. 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 second coil is not disposed on the third and fourth portions of the substrate.

9. The lens driving device according to claim 8, wherein, The first coil includes coils disposed on the third and fourth portions of the substrate.

10. The lens driving device according to claim 2, wherein, The first magnet includes four magnets respectively disposed on the four side surfaces of the retainer, and The second magnet comprises two magnets respectively disposed on two opposite side surfaces of the outer casing.

11. The lens driving device according to claim 1, wherein, The first ball is disposed on the upper surface of the retainer.

12. The lens driving device according to claim 2, comprising a first yoke disposed on the upper surface of the outer casing. in, The first yoke overlaps with the first magnet and the first ball in the direction of the optical axis.

13. The lens driving device according to claim 1, wherein, The first ball bearing consists of four balls. The virtual plane connecting the centers of the four balls is perpendicular to the optical axis.

14. The lens driving device according to claim 5, further comprising a second ball bearing, the second ball bearing being in contact with the outer cover and the base. in, The second ball comprises two balls arranged symmetrically with respect to the optical axis.

15. The lens driving device according to claim 14, further comprising a second yoke disposed on the substrate. in, Furthermore, the second yoke overlaps with the second magnet in a direction perpendicular to the optical axis.

16. The lens driving device according to claim 5, wherein, The first magnet includes a magnet facing the first coil disposed in the first portion of the substrate, and the second magnet includes a magnet facing the second coil disposed in the first portion of the substrate.

17. The lens driving device according to claim 8, wherein, The base includes two protruding portions that protrude from the third side surface of the base and are spaced apart from each other in the optical axis direction. The third portion of the substrate includes a first region and a second region. The first region is provided with the first coil, and the second region extends from the first region and is disposed between the two protruding portions of the base. In the optical axis direction, the length of the first region of the substrate is greater than the length of the second region of the substrate.

18. A lens driving device, comprising: The base includes a first side surface to a fourth side surface; An outer cover, the outer cover being configured to move relative to the base in the optical axis direction; A retainer configured to move relative to the outer casing; A first drive unit, configured to move the retainer; A second drive unit is configured to move the outer casing in the direction of the optical axis; A first ball bearing is disposed between the retainer and the outer cover; as well as A metal component, wherein the metal component is disposed on at least one of the outer cover and the retainer. The first driving unit includes a first-first coil and a first-second coil. The first-first coil is configured to move the retainer in a first direction perpendicular to the optical axis, and the first-second coil is configured to move the retainer in a second direction perpendicular to both the optical axis and the first direction. The first ball is configured to guide the movement of the retainer relative to the outer casing in both the first and second directions. The first ball is in contact with the metal component.

19. A camera module, comprising: Printed circuit boards; An image sensor, wherein the image sensor is disposed on the printed circuit board; The lens driving device according to any one of claims 1-18, wherein the lens driving device is disposed on the printed circuit board; as well as A lens, which is connected to the retaining element of the lens driving device.

20. An optical device, comprising: main body; The camera module according to claim 19 is disposed on the main body; as well as A display is disposed on the main body and configured to output at least one of images and videos captured by the camera module.

Images