Lens drive device, camera device and optical equipment

Abstract

A first embodiment of the present invention relates to a lens driving device including a fixed part, a moving part disposed within the fixed part, a coil disposed in the fixed part, a first magnet disposed in the moving part and interacting with the coil, a second magnet disposed in the fixed part, and a ball disposed between the fixed part and the moving part, wherein the second magnet pressurizes the first magnet such that the ball is pressurized between the fixed part and the moving part.

Description

[Technical Field]

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

[0002] A camera device is a device that takes photographs or videos of a subject, and is attached to optical devices such as smartphones, drones, vehicles, etc.

[0003] The camera device is equipped with an autofocus function that automatically adjusts the focus according to the distance to the subject. The autofocus function is performed by moving the lens along the optical axis relative to the image sensor, and the movement of the lens along the optical axis can be guided by a ball. In this case, the attractive force between the magnet and the yoke can be used to hold the ball between the fixed part and the moving part.

[0004] In this case, however, a problem may arise in that the lens rolls due to the moment generated by the ball.

[0005] (Patent Document 1) Korean Patent Publication No. 10-2015-0118005 Summary of the Invention [Problem to be solved by the invention]

[0006] The first embodiment of the present invention aims to provide a lens driving device that minimizes the generation of moment due to the ball.

[0007] The first embodiment of the present invention provides a lens driving device in which lens rolling, i.e., rotation, is minimized.

[0008] The first embodiment of the present invention provides a lens driving device whose size in the horizontal direction is reduced by the thickness of the yoke.

[0009] The first embodiment of the present invention aims to provide a lens driving device in which the ball can be positioned at various positions, such as the center of gravity of the moving part or the opposite side of the driving magnet, as required.

[0010] The second embodiment of the present invention provides a lens driving device in which the ball is disposed close to the optical axis, thereby minimizing the generation of moment due to the ball.

[0011] The second embodiment of the present invention provides a lens driving device in which lens rolling, i.e., rotation, is minimized.

[0012] The second embodiment of the present invention aims to provide a lens driving device in which the ball can be positioned at various positions, such as the center of gravity of the moving part or the opposite side of the driving magnet, as required. [Means for solving the problem]

[0013] A lens driving device according to a first embodiment of the present invention includes a fixed part, a movable part disposed within the fixed part, a coil disposed in the fixed part, a first magnet disposed in the movable part and interacting with the coil, a second magnet disposed in the fixed part, and a ball disposed between the fixed part and the movable part, wherein the second magnet may pressurize the first magnet so that the ball is pressurized between the fixed part and the movable part.

[0014] When a current is applied to the coil, the first magnet may move in the optical axis direction.

[0015] The coil may overlap the first magnet in a first axis direction perpendicular to the optical axis direction, and the second magnet may overlap the first magnet in the first axis direction.

[0016] The second magnet may include a first portion that overlaps with the first magnet in the first axial direction, and a second portion that does not overlap with the first magnet in the first axial direction.

[0017] The second magnet may overlap the coil in a second axis direction perpendicular to the optical axis direction and the first axis direction.

[0018] The second magnet may include a first unit magnet disposed on one side of the coil and a second unit magnet disposed on the other side of the coil.

[0019] The second magnet may be disposed so as to generate a repulsive force with the first magnet.

[0020] The first magnet may include a first magnet portion including a north pole and a south pole, a second magnet portion including a south pole and a north pole, and a neutral portion disposed between the first magnet portion and the second magnet portion.

[0021] The second magnet may include a first magnet portion including an N pole and an S pole, a second magnet portion including an S pole and an N pole, and a neutral portion arranged between the first magnet portion of the second magnet and the second magnet portion of the second magnet, and the N pole of the first magnet portion of the second magnet may face the N pole of the first magnet portion of the first magnet, and the S pole of the second magnet portion of the second magnet may face the S pole of the second magnet portion of the first magnet.

[0022] The length of the neutral portion of the second magnet may be longer than the length of the neutral portion of the first magnet in the optical axis direction.

[0023] When the first magnet moves maximally downward in the optical axis direction, a first boundary between the first magnet portion of the first magnet and the neutral portion of the first magnet may be positioned at the same height as or lower than a first boundary between the first magnet portion of the second magnet and the neutral portion of the second magnet.

[0024] When the first magnet moves maximally upward in the optical axis direction, the second boundary between the second magnet portion of the first magnet and the neutral portion of the first magnet may be positioned at the same height as or higher than the second boundary between the second magnet portion of the second magnet and the neutral portion of the second magnet.

[0025] In the optical axis direction, the length of the second magnet may be longer than the length of the first magnet, and in the optical axis direction, the length of the first magnet portion of the second magnet may be shorter than the length of the first magnet portion of the first magnet.

[0026] A lens driving device according to a first embodiment of the present invention includes a fixed part, a movable part arranged within the fixed part, a coil arranged in the fixed part, a magnet arranged in the movable part and interacting with the coil, and a ball arranged between the fixed part and the movable part, wherein the fixed part includes a first side wall on which the coil is arranged, a second side wall arranged opposite the first side wall, and a protrusion arranged to overlap between the first side wall and the second side wall in a first direction in which the first side wall faces the second side wall, and in the first direction, the movable part includes a protrusion arranged between the first side wall of the fixed part and the protrusion, and the ball may be arranged between the protrusion of the movable part and the protrusion of the fixed part.

[0027] The camera device according to the first embodiment of the present invention may include a printed circuit board, an image sensor disposed on the printed circuit board, a lens driving device disposed on the printed circuit board, and a lens coupled to the lens driving device.

[0028] The optical device according to the first embodiment of the present invention may include a main body, a camera device disposed on the main body, and a display disposed on the main body and configured to output one or more of a video and an image captured by the camera device.

[0029] A lens driving device according to a second embodiment of the present invention includes a fixed portion, a movable portion arranged within the fixed portion so as to be movable in the optical axis direction, a coil arranged on the fixed portion, a first magnet arranged on the movable portion and facing the coil in a first direction perpendicular to the optical axis direction, a ball arranged between the fixed portion and the movable portion, and a second magnet arranged on the fixed portion and exerting a repulsive force on the first magnet, and the coil may overlap with the second magnet in the first direction.

[0030] The second magnet may pressurize the first magnet such that the ball is pressed between the fixed portion and the moving portion.

[0031] At least a portion of the coil may be disposed between the first magnet and the second magnet in the first direction.

[0032] The length of the second magnet in the optical axis direction may be longer than the length of the first magnet.

[0033] An upper surface of the second magnet may be positioned higher than an upper surface of the first magnet, and a lower surface of the second magnet may be positioned lower than a lower surface of the first magnet.

[0034] The fixed portion may include a base and a substrate disposed on the base, the coil may be disposed on an inner surface of the substrate, and the second magnet may be disposed on an outer surface of the substrate.

[0035] The length of the second magnet in a second direction perpendicular to the optical axis direction and the first direction may be 15 to 40% of the length of the first magnet.

[0036] The thickness of the second magnet may be smaller than the thickness of the first magnet in the first direction.

[0037] The second magnet may include a first magnet portion including an N pole and an S pole, a second magnet portion arranged on the first magnet portion and including an S pole and an N pole, and a neutral portion arranged between the first magnet portion and the second magnet portion, and the length of the second magnet portion in the optical axis direction may be 10 to 50% of the length of the neutral portion.

[0038] The first magnet may include a first magnet portion including an N pole and an S pole, a second magnet portion arranged on the first magnet portion and including an S pole and an N pole, and a neutral portion arranged between the first magnet portion and the second magnet portion, and the length of the neutral portion of the second magnet may be longer than the length of the neutral portion of the first magnet in the optical axis direction.

[0039] When a forward current is applied to the coil and the moving part moves to the upper side in the optical axis direction to its maximum extent, the upper end of the neutral part of the first magnet may be positioned at the same height as or lower than the upper end of the neutral part of the second magnet, and when a reverse current is applied to the coil and the moving part moves to the lower side in the optical axis direction to its maximum extent, the lower end of the neutral part of the first magnet may be positioned at the same height as or higher than the lower end of the neutral part of the second magnet.

[0040] The ball may be spaced a first distance from the optical axis, and at least a portion of the first magnet may be spaced from the optical axis by a distance greater than the first distance.

[0041] The distance between the ball and the optical axis may be the same as the distance between the second magnet and the optical axis.

[0042] A camera device according to a second embodiment of the present invention may include a printed circuit board, an image sensor disposed on the printed circuit board, a lens driving device disposed on the printed circuit board, and a lens coupled to the lens driving device.

[0043] An optical device according to a second embodiment of the present invention may include a main body, a camera device disposed on the main body, and a display disposed on the main body and configured to output one or more of a video and an image captured by the camera device. [Effects of the Invention]

[0044] Through the first embodiment of the present invention, the generation of moment due to the ball can be minimized, thereby minimizing the rolling, i.e., rotation, phenomenon of the lens.

[0045] Through the first embodiment of the present invention, the horizontal size of the lens driving device can be reduced by the thickness of the yoke.

[0046] In the first embodiment of the present invention, the ball can be placed in various positions, such as at the center of gravity of the moving part or on the opposite side of the drive magnet, as needed, thereby improving design flexibility. More specifically, the ball can be placed on an imaginary plane that passes through the center of gravity of the moving part and is parallel to the inner surface of the magnet.

[0047] In the second embodiment of the present invention, the ball is positioned close to the optical axis, thereby minimizing the generation of moment due to the ball, thereby minimizing the rolling, i.e., rotation, phenomenon of the lens.

[0048] The second embodiment of the present invention can improve the degree of freedom in designing the placement positions of the balls. [Brief explanation of the drawings]

[0049] [Figure 1] 1 is a perspective view of a lens driving device according to a first embodiment of the present invention.

[0050] [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG.

[0051] [Figure 3]1 is a cross-sectional perspective view of a lens driving device according to a first embodiment of the present invention.

[0052] [Figure 4] FIG. 2 is a cross-sectional view taken along the line BB in FIG.

[0053] [Figure 5] 1 is a cross-sectional perspective view of a lens driving device according to a first embodiment of the present invention. [Figure 6] 1 is a cross-sectional perspective view of a lens driving device according to a first embodiment of the present invention.

[0054] [Figure 7] 1 is a cross-sectional view of a lens driving device according to a first embodiment of the present invention, cut perpendicular to the optical axis and viewed from above.

[0055] [Figure 8] 1 is an exploded perspective view of a lens driving device according to a first embodiment of the present invention.

[0056] [Figure 9] FIG. 9 is an exploded perspective view seen from a different direction from that of FIG. 8.

[0057] [Figure 10] 1 is a perspective view of a lens driving device according to a first embodiment of the present invention with a cover removed.

[0058] [Figure 11] 1 is a plan view of a lens driving device according to a first embodiment of the present invention with a cover removed.

[0059] [Figure 12] 1 is a bottom perspective view of the lens driving device according to the first embodiment of the present invention with the cover removed.

[0060] [Figure 13] 1 is a partial perspective view of a lens driving device according to a first embodiment of the present invention with a cover removed.

[0061] [Figure 14] 1 is a perspective view showing a configuration related to a fixing portion of a lens driving device according to a first embodiment of the present invention.

[0062] [Figure 15] FIG. 15 is a partially enlarged view of FIG. 14 as seen from another direction.

[0063] [Figure 16] 1 is a perspective view showing a configuration related to a moving unit of a lens driving device according to a first embodiment of the present invention.

[0064] [Figure 17] FIG. 17 is a perspective view seen from a different direction from that of FIG. 16.

[0065] [Figure 18] 1 is a perspective view showing a configuration related to a magnet and a coil of a lens driving device according to a first embodiment of the present invention.

[0066] [Figure 19] FIG. 19 is a perspective view of FIG. 18 in which the drive magnet is omitted.

[0067] [Figure 20] FIG. 19 is a plan view of FIG. 18 viewed from above.

[0068] [Figure 21] 1A is a diagram showing a drive magnet and a repulsive magnet of a lens drive device according to a first embodiment of the present invention; FIG. 1A is a diagram showing the drive magnet and the repulsive magnet before the drive magnet moves, i.e., in the initial state; FIG. 1B is a diagram showing the drive magnet and the repulsive magnet when the drive magnet has moved to the maximum extent upward in the optical axis direction; and FIG. 1C is a diagram showing the drive magnet and the repulsive magnet when the drive magnet has moved to the maximum extent downward in the optical axis direction.

[0069] [Figure 22]FIG. 3 is a conceptual diagram conceptually showing how a ball is pressurized by a repulsive force between a drive magnet and a repulsive magnet in the first embodiment of the present invention.

[0070] [Figure 23] FIG. 2 is a diagram for explaining autofocus driving of the lens driving device according to the first embodiment of the present invention, and is a cross-sectional view showing the state of the moving part in the initial state when no current is applied to the coil. [Figure 24] FIG. 10 is a cross-sectional view illustrating the autofocus drive of the lens driving device according to the first embodiment of the present invention, showing the state in which a forward current is applied to the coil and the moving part moves upward in the optical axis direction. [Figure 25] FIG. 10 is a cross-sectional view illustrating the autofocus drive of the lens driving device according to the first embodiment of the present invention, showing the state in which a reverse current is applied to the coil and the moving part moves downward in the optical axis direction.

[0071] [Figure 26] 1 is an exploded perspective view of a camera device according to a first embodiment of the present invention.

[0072] [Figure 27] 1 is a perspective view of an optical apparatus according to a first embodiment of the present invention.

[0073] [Figure 28] FIG. 10 is a perspective view of an optical device according to a modified example.

[0074] [Figure 29] FIG. 10 is a perspective view of a lens driving device according to a second embodiment of the present invention.

[0075] [Figure 30] FIG. 30 is a cross-sectional view taken along the line AA in FIG. 29.

[0076] [Figure 31] FIG. 30 is a cross-sectional view taken along the line BB in FIG. 29.

[0077] [Figure 32] 10A to 10C are cross-sectional perspective views of a lens driving device according to a second embodiment of the present invention, taken along different portions. [Figure 33] 10A to 10C are cross-sectional perspective views of a lens driving device according to a second embodiment of the present invention, taken along different portions. [Figure 34] 10A to 10C are cross-sectional perspective views of a lens driving device according to a second embodiment of the present invention, taken along different portions.

[0078] [Figure 35] FIG. 10 is a cross-sectional view of a lens driving device according to a second embodiment of the present invention, cut perpendicular to the optical axis and viewed from above.

[0079] [Figure 36] FIG. 10 is an exploded perspective view of a lens driving device according to a second embodiment of the present invention.

[0080] [Figure 37] FIG. 37 is an exploded perspective view seen from a different direction from that of FIG. 36.

[0081] [Figure 38] FIG. 10 is a perspective view of a lens driving device according to a second embodiment of the present invention, with the cover omitted.

[0082] [Figure 39] FIG. 39 is a perspective view of the state in which the moving unit and related components in FIG. 38 are omitted.

[0083] [Figure 40] FIG. 40 is a perspective view of FIG. 39 seen from another direction.

[0084] [Figure 41] FIG. 41 is a perspective view of FIG. 40 in which the balls, the substrate, and the repulsive magnets are omitted.

[0085] [Figure 42] FIG. 10 is a perspective view showing a configuration related to a moving unit of a lens driving device according to a second embodiment of the present invention.

[0086] [Figure 43] FIG. 43 is a perspective view of FIG. 42 seen from another direction.

[0087] [Figure 44] FIG. 10 is a front view showing a moving section, a driving section, and a repulsive magnet of a lens driving device according to a second embodiment of the present invention.

[0088] [Figure 45] FIG. 10 is a cross-sectional perspective view showing a drive magnet, a repulsive magnet, and related configurations of a lens drive device according to a second embodiment of the present invention.

[0089] [Figure 46] FIG. 10 is a perspective view of a drive magnet and a repulsive magnet of a lens drive device according to a second embodiment of the present invention.

[0090] [Figure 47] 10A and 10B are diagrams showing a drive magnet and a repulsive magnet of a lens drive device according to a second embodiment of the present invention. (a) is a diagram showing the drive magnet and the repulsive magnet before the drive magnet moves, i.e., in the initial state. (b) is a diagram showing the drive magnet and the repulsive magnet when the drive magnet has moved to the maximum extent upward in the optical axis direction. (c) is a diagram showing the drive magnet and the repulsive magnet when the drive magnet has moved to the maximum extent downward in the optical axis direction.

[0091] [Figure 48] 10 is a cross-sectional view for comparing the distances between the optical axis and each component in a lens driving device according to a second embodiment of the present invention. FIG.

[0092] [Figure 49] FIG. 10 is a diagram for explaining autofocus driving of a lens driving device according to a second embodiment of the present invention, and is a cross-sectional view showing the state of a moving part in an initial state in which no current is applied to a coil. [Figure 50]FIG. 10 is a cross-sectional view illustrating the autofocus drive of the lens driving device according to the second embodiment of the present invention, showing the state in which a forward current is applied to the coil and the moving part moves upward in the optical axis direction. [Figure 51] FIG. 10 is a cross-sectional view illustrating the autofocus drive of the lens driving device according to the second embodiment of the present invention, showing the state in which a reverse current is applied to the coil and the moving part moves downward in the optical axis direction.

[0093] [Figure 52] FIG. 10 is an exploded perspective view of a camera device according to a second embodiment of the present invention.

[0094] [Figure 53] FIG. 10 is a perspective view of an optical apparatus according to a second embodiment of the present invention.

[0095] [Figure 54] FIG. 10 is a perspective view of an optical device according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0096] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0097] However, the technical concept of the present invention is not limited to the described embodiments, but can be realized in various different forms, and one or more of the components of the embodiments can be selectively combined or substituted and used within the scope of the technical concept of the present invention.

[0098] Furthermore, unless otherwise clearly defined and described, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted in a meaning that is commonly understood by a person having ordinary knowledge in the technical field to which the present invention belongs, and commonly used terms, such as terms defined in a dictionary, may be interpreted in light of the contextual meaning of the relevant art.

[0099] Furthermore, the terms used in the examples of the present invention are intended to explain the examples and are not intended to limit the present invention.

[0100] In this specification, unless otherwise specified in the phrase, the singular can also include the plural, and when it says "A and (and) at least one (or more) of B, C," it can include one or more of all possible combinations of A, B, and C.

[0101] Furthermore, in describing components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. are used only to distinguish the component from other components, and the terms do not limit the essence, order, or sequence of the components.

[0102] Furthermore, when a component is described as being "coupled," "coupled," or "connected" to another component, it can include not only cases where the component is directly "coupled," "coupled," or "connected" to the other component, but also cases where the component is "coupled," "coupled," or "connected" by another component between the component and the other component.

[0103] Furthermore, when it is described as being formed or disposed "above (above)" or "below (below)" each component, "above (above)" or "below (below)" includes not only the case where two components are in direct contact with each other, but also the case where one or more other components are formed or disposed between the two components. Furthermore, when it is expressed as "above (above)" or "below (below)", it can include not only the upper direction but also the lower direction based on one component.

[0104] The "optical axis (see OA in FIG. 23) direction" used below is defined as the optical axis direction of the lens and / or image sensor coupled to the lens driving device.

[0105] The "vertical direction" used below may be a direction parallel to or the same as the optical axis direction. The vertical direction may correspond to the "z-axis direction." The "horizontal direction" used below may be a direction perpendicular to the vertical direction. That is, the horizontal direction may be a direction perpendicular to the optical axis. Therefore, the horizontal direction may include the "x-axis direction" and the "y-axis direction."

[0106] The term "autofocus (AF) function" used below is defined as a function that automatically adjusts the focus on a subject by adjusting the distance from the image sensor by moving the lens along the optical axis according to the distance of the subject so that a clear image of the subject can be obtained on the image sensor. Also, the term "closed-loop autofocus (CLAF) control" is defined as a function that senses the distance between the image sensor and the lens and controls the position of the lens in real time as feedback to improve the accuracy of focus adjustment.

[0107] In the following, one of the "x-axis" and "y-axis" may be referred to as the "first axis", and the other may be referred to as the "second axis".

[0108] Hereinafter, one of the "drive magnet 310" and the "repulsive magnet 500" may be referred to as a "first magnet," and the other may be referred to as a "second magnet."

[0109] Hereinafter, one of the "lower magnet portion 311" and the "upper magnet portion 312" may be referred to as the "first magnet portion," and the other may be referred to as the "second magnet portion."

[0110] Hereinafter, one of the "lower magnet portion 510" and the "upper magnet portion 520" may be referred to as the "first magnet portion," and the other may be referred to as the "second magnet portion."

[0111] Hereinafter, one of the "drive magnet 1310" and the "repulsive magnet 1500" may be referred to as the "first magnet," and the other may be referred to as the "second magnet."

[0112] Hereinafter, one of the "lower magnet portion 1311" and the "upper magnet portion 1312" may be referred to as the "first magnet portion," and the other may be referred to as the "second magnet portion."

[0113] Hereinafter, one of the "lower magnet portion 1510" and the "upper magnet portion 1520" may be referred to as the "first magnet portion," and the other may be referred to as the "second magnet portion."

[0114]

[0115] The configuration of a lens driving device according to a first embodiment of the present invention will be described below with reference to the drawings.

[0116] FIG. 1 is a perspective view of a lens driving device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. FIG. 3 is a cross-sectional perspective view of the lens driving device according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view taken along line BB in FIG. 1. FIGS. 5 and 6 are cross-sectional perspective views of the lens driving device according to the first embodiment of the present invention. FIG. 7 is a cross-sectional view of the lens driving device according to the first embodiment of the present invention cut perpendicular to the optical axis and viewed from above. FIG. 8 is an exploded perspective view of the lens driving device according to the first embodiment of the present invention. FIG. 9 is an exploded perspective view seen from a different direction from FIG. 8. FIG. 10 is a perspective view of the lens driving device according to the first embodiment of the present invention with the cover removed. FIG. 11 is a plan view of the lens driving device according to the first embodiment of the present invention with the cover removed. FIG. 12 is a bottom perspective view of the lens driving device according to the first embodiment of the present invention with the cover removed. FIG. 13 is a partial see-through view of the lens driving device according to the first embodiment of the present invention with the cover removed. FIG. 14 is a perspective view showing a fixing portion and related configuration of the lens driving device according to the first embodiment of the present invention. FIG. 15 is a partially enlarged view of FIG. 14 seen from another direction. FIG. 16 is a perspective view showing a configuration related to a moving unit of a lens driving device according to a first embodiment of the present invention. FIG. 17 is a perspective view seen from a different direction from FIG. 16. FIG. 18 is a perspective view showing a configuration related to a magnet and a coil of a lens driving device according to a first embodiment of the present invention. FIG. 19 is a perspective view of FIG. 18 with the drive magnet omitted. FIG. 20 is a plan view of FIG. 18 seen from above. FIG. 21 is a view showing a drive magnet and a repulsive magnet of a lens driving device according to a first embodiment of the present invention. (a) is a view showing the drive magnet and the repulsive magnet before the drive magnet moves, i.e., in the initial state. (b) is a view showing the drive magnet and the repulsive magnet when the drive magnet has moved maximally upward in the optical axis direction. (c) is a view showing the drive magnet and the repulsive magnet when the drive magnet has moved maximally downward in the optical axis direction. FIG. 22 is a conceptual diagram conceptually showing how a ball is pressurized by the repulsive force between the drive magnet and the repulsive magnet in the first embodiment of the present invention.

[0117] The lens driving device 10 may be a voice coil motor (VCM). The lens driving device 10 may be a lens driving motor. The lens driving device 10 may be a lens driving actuator. The lens driving device 10 may include an AF module. The lens driving device 10 may include an AF actuator.

[0118] The lens driving device 10 may include a fixed part 100. The fixed part 100 may be a part that is fixed relative to the moving part 200 when the moving part 200 moves. The moving part 200 may move relative to the fixed part 100.

[0119] The lens driving device 10 may include a base 110. The fixed part 100 may include the base 110. The base 110 may be disposed below the holder 210. The base 110 may be coupled to the cover 130. The holder 210 may be disposed on the base 110. The holder 210 may be disposed on a bottom plate 111 of the base 110. The holder 210 may be disposed within the base 110. The holder 210 may be disposed within a side plate 112 of the base 110.

[0120] The base 110 may include a lower plate 111. The lower plate 111 of the base 110 may support a lower surface of the moving unit 200. The lower plate 111 of the base 110 may support a lower surface of the holder 210. The lower plate 111 of the base 110 may function as a lower stopper for the moving unit 200. The lower plate 111 of the base 110 may function as a lower stopper for the holder 210.

[0121] The base 110 may include side plates 112. The side plates 112 may be 'side portions'. The side plates 112 may be 'side walls'. The side plates 112 of the base 110 may extend from the upper surface of the lower plate 111. The side plates 112 may include a plurality of side plates. The side plates 112 may include four side plates. The side plates 112 may include first to fourth side plates. The side plates 112 may include a first side plate and a second side plate arranged opposite to each other, and a third side plate and a fourth side plate arranged opposite to each other.

[0122] The base 110 may include a pillar 113. The pillar 113 may extend from the upper surface of the bottom plate 111. The pillar 113 may extend inward from the side plate 112. A ball 400 may be disposed in the pillar 113. A groove 114 in which the ball 400 is disposed may be formed in the pillar 113. The pillar 113 may be referred to as a 'protrusion'.

[0123] The fixed part 100 may include a first sidewall on which the coil 320 is disposed, a second sidewall disposed opposite the first sidewall, and a protrusion disposed to overlap between the first sidewall and the second sidewall in a first direction in which the first sidewall faces the second sidewall. In this case, the protrusion may be a pillar part 113. The moving part 200 may include a protrusion disposed between the first sidewall and the protrusion of the fixed part 100 in the first direction. The ball 400 may be disposed between the protrusion of the moving part 200 and the protrusion of the fixed part 100.

[0124] The base 110 may include a groove 114. The post 113 may include a groove 114. The groove 114 may be formed in the post 113. The groove 114 may be a 'ball-receiving groove'. A ball 400 may be disposed in the groove 114. The groove 114 may be in direct contact with the ball 400. The groove 114 may be disposed in the optical axis direction. The groove 114 may include multiple grooves. The groove 114 may include two grooves. The two grooves may be disposed parallel to each other.

[0125] The base 110 may include a groove 115. The groove 115 may be a 'repulsive magnet accommodating groove'. A repulsive magnet 500 may be disposed in the groove 115. The groove 115 may include a shape corresponding to the repulsive magnet 500. The groove 115 may be formed on the inner surface of the side plate 112 of the base 110. The groove 115 may include a plurality of grooves. The groove 115 may include two grooves.

[0126] The base 110 may include a step 116. The step 116 may be formed at a lower end of an outer surface of the base 110. The step 116 may protrude from the outer surface of the base 110. A side plate 132 of the cover 130 may be disposed on the step 116 of the base 110.

[0127] The base 110 may include a protrusion 117. The protrusion 117 may be a 'substrate coupling protrusion'. The protrusion 117 may be inserted into a hole in the substrate 120. The protrusion 117 may be coupled to the substrate 120. The protrusion 117 may fix the substrate 120. The protrusion 117 may be formed on the side plate 112. The protrusion 117 may be formed to protrude from the outer surface of the base 110. The protrusion 117 may include multiple protrusions. The protrusion 117 may include two protrusions.

[0128] One of the "groove 114" and the "groove 115" of the base 110 can be referred to as a "first groove" and the other as a "second groove."

[0129] The lens driving device 10 may include a substrate 120. The fixed part 100 may include the substrate 120. The substrate 120 may be disposed on the fixed part 100. The substrate 120 may be disposed on the base 110. The substrate 120 may be disposed on the side plate 112 of the base 110. The substrate 120 may be disposed on the cover 130. The substrate 120 may be disposed on the side plate 132 of the cover 130. The substrate 120 may be disposed on the inner surface of the side plate 132 of the cover 130. The substrate 120 may be disposed on the outer surface of the side plate 132 of the cover 130. The substrate 120 may be disposed parallel to the optical axis. The coil 320 and the sensor 330 may be disposed on the substrate 120. The substrate 120 may include a printed circuit board. The substrate 120 may include a flexible printed circuit board (FPCB).

[0130] The substrate 120 may include terminals 121. The terminals 121 may be formed on a lower end of the outer surface of the substrate 120. The terminals 121 of the substrate 120 may be coupled to the printed circuit board 50 of the camera device 10A. The terminals 121 of the substrate 120 may be electrically connected to the printed circuit board 50 of the camera device 10A. The terminals 121 of the substrate 120 may be coupled to the printed circuit board 50 of the camera device 10A by solder. The terminals 121 may include a plurality of terminals. The terminals 121 may include five terminals. The terminals 121 may include a terminal electrically connected to the sensor 330. The terminals 121 may include a ground terminal for grounding. The terminals 121 may include a terminal electrically connected to the coil 320.

[0131] The lens driving device 10 may include a cover 130. The fixed part 100 may include the cover 130. The cover 130 may be disposed on the base 110. The cover 130 may be coupled to the base 110. The cover 130 may be fixed to the base 110. The cover 130 may house the holder 210 inside. The cover 130 may be a shielding member. The cover 130 may be a shielding can.

[0132] The cover 130 may include an upper plate 131. The upper plate 131 of the cover 130 may function as an upper stopper for the moving unit 200. The upper plate 131 of the cover 130 may function as an upper stopper for the holder 210. The upper plate 131 may be disposed on the moving unit 200. The upward movement of the moving unit 200 may be limited by the moving unit 200 coming into contact with the upper plate 131. The upper plate 131 may include a hole through which light passes.

[0133] The cover 130 may include side plates 132. The side plates 132 may extend from the upper plate 131. The side plates 132 may be disposed on the base 110. The side plates 132 may be disposed on steps 116 formed to protrude from the lower end of the outer surface of the base 110. The side plates 132 may include a plurality of side plates. The side plates 132 may include four side plates. The side plates 132 may include first and second side plates disposed opposite each other, and third and fourth side plates disposed opposite each other.

[0134] The lens driving device 10 may include a moving unit 200. The moving unit 200 may be disposed on the fixed unit 100. The moving unit 200 may be disposed within the fixed unit 100. The moving unit 200 may be disposed on the fixed unit 100. The moving unit 200 may be movably disposed on the fixed unit 100. The moving unit 200 may be moved with respect to the fixed unit 100 by the driving unit 300. The moving unit 200 may be moved in the optical axis direction relative to the fixed unit 100 by the driving unit 300. The moving unit 200 may move in the optical axis direction. The moving unit 200 may move during AF driving. A lens may be coupled to the moving unit 200.

[0135] The lens driving device 10 may include a holder 210. The moving unit 200 may include a holder 210. The holder 210 may be an 'AF holder'. The holder 210 may be a 'bobbin'. The holder 210 may be a 'carrier'. The holder 210 may be disposed within the base 110. The holder 210 may be disposed on the base 110. The holder 210 may be disposed within the cover 130. The holder 210 may be disposed movably. The holder 210 may be disposed movably in the optical axis direction.

[0136] The holder 210 may include a first portion 211. The first portion 211 may be disposed between the side plate 112 and the column portion 113 of the base 110. A ball 400 may be disposed in the first portion 211 of the holder 210. A groove 212 in which the ball 400 is disposed may be formed in the first portion 211 of the holder 210.

[0137] The holder 210 may include a groove 212. The groove 212 may be a 'ball-receiving groove'. The ball 400 may be disposed in the groove 212. The groove 212 may be in direct contact with the ball 400. The groove 212 may be disposed in the optical axis direction. The groove 212 may guide the ball 400 to move in the optical axis direction. The groove 212 may include a plurality of grooves. The groove 212 may include two grooves. The two grooves may be disposed parallel to each other. The groove 212 of the holder 210 may be disposed to face the groove 114 of the base 110. The ball 400 may be disposed between the groove 212 of the holder 210 and the groove 114 of the base 110.

[0138] The holder 210 may include a groove 213. The groove 213 may be a 'drive magnet accommodating groove'. The groove 213 may be formed on the outer surface of the holder 210. The groove 213 may be formed in a concave shape on the side surface of the holder 210. The drive magnet 310 may be disposed in the groove 213. The groove 213 may be formed in a shape corresponding to the drive magnet 310. The groove 213 may be recessed to a depth equal to the thickness of the drive magnet 310.

[0139] One of the "groove 212" and the "groove 213" of the holder 210 can be referred to as a "first groove" and the other as a "second groove."

[0140] The lens driving device 10 may include a driving unit 300. The driving unit 300 may move the moving unit 200 in the optical axis direction. The driving unit 300 may move the holder 210 in the optical axis direction. The driving unit 300 may move the holder 210 in the optical axis direction through electromagnetic force. The driving unit 300 may include a driving magnet 310 and a coil 320. The driving magnet 310 and the coil 320 may move the moving unit 200 in the optical axis direction.

[0141] The lens driving device 10 may include a driving magnet 310. The driving unit 300 may include the driving magnet 310. The driving magnet 310 may be disposed in the moving unit 200. The driving magnet 310 may be disposed in the holder 210. The driving magnet 310 may be fixed to the holder 210. The driving magnet 310 may be coupled to the holder 210. The driving magnet 310 may be adhered to the holder 210 with an adhesive. The driving magnet 310 may be disposed within the cover 130. The driving magnet 310 may be disposed between the coil 320 and the holder 210. The driving magnet 310 may be disposed inside the coil 320. The driving magnet 310 may overlap the coil 320 in a direction perpendicular to the optical axis. The driving magnet 310 may face the coil 320. The driving magnet 310 may face the coil 320. The driving magnet 310 may be disposed at a position corresponding to the coil 320. The drive magnet 310 can interact with the coil 320. The drive magnet 310 can electromagnetically interact with the coil 320. The drive magnet 310 can move. The drive magnet 310 can be movably arranged. The drive magnet 310 can move during AF drive. The drive magnet 310 can move together with the holder 210. The drive magnet 310 can move in the optical axis direction. When a current is applied to the coil 320, the drive magnet 310 can move in the optical axis direction.

[0142] The drive magnet 310 may be a four-pole magnet. The drive magnet 310 may include a four-pole magnetized magnet. The drive magnet 310 may include a lower magnet portion 311 including a north pole and a south pole. The drive magnet 310 may include an upper magnet portion 312 including a south pole and a north pole. The drive magnet 310 may include a neutral portion 313 disposed between the lower magnet portion 311 and the upper magnet portion 312.

[0143] The upper magnet part 312 may be disposed on the lower magnet part 311. The lower magnet part 311 and the upper magnet part 312 may be disposed in the optical axis direction. The lower magnet part 311 and the upper magnet part 312 may be spaced apart in the optical axis direction. A neutral part 313 may be disposed between the lower magnet part 311 and the upper magnet part 312.

[0144] The lens driving device 10 may include a coil 320. The driving unit 300 may include a coil 320. The coil 320 may be disposed on the substrate 120. The coil 320 may be disposed on the inner surface of the substrate 120. The coil 320 may be disposed on the fixed unit 100. The coil 320 may be disposed on the base 110. The coil 320 may be disposed on the cover 130. The coil 320 may be disposed outside the drive magnet 310. The coil 320 may be disposed between the side plate 132 of the cover 130 and the drive magnet 310. The coil 320 may be fixed. The coil 320 may be maintained in a fixed state even during AF driving. The coil 320 may interact with the drive magnet 310. The coil 320 may face the drive magnet 310. The coil 320 may be disposed at a position corresponding to the drive magnet 310. The coil 320 can overlap the drive magnet 310 in a direction perpendicular to the optical axis, and the coil 320 can overlap the drive magnet 310 in the x-axis direction perpendicular to the optical axis direction.

[0145] The lens driving device 10 may include a sensor 330. The driving unit 300 may include the sensor 330. The sensor 330 can sense the driving magnet 310. The sensor 330 may be disposed on the substrate 120. The sensor 330 may be disposed within the coil 320. The sensor 330 may be a Hall sensor. The amount of movement or position of the driving magnet 310 sensed by the sensor 330 may be used for feedback of the autofocus drive.

[0146] Alternatively, the sensor 330 may be a driver IC. The driver IC may include a Hall element that senses the drive magnet 310. The driver IC may include a sensing unit. The sensing unit may include a Hall element (Hall IC). The driver IC may be electrically connected to the coil 320. The driver IC may apply a current to the coil 320.

[0147] The lens driver 10 may include a capacitor 340. The driver 300 may include a capacitor 340. The capacitor 340 may be disposed on the substrate 120. The capacitor 340 may be disposed within the coil 320. The capacitor 340 may be disposed next to the sensor 330. The capacitor 340 may be used to remove noise sensed by the sensor 330.

[0148] The lens driving device 10 may include a guide member. The guide member may include a ball 400. The guide member may include a shaft. The guide member may include a pin. The guide member may include a cylindrical member. The guide member may guide the movement of the moving part 200 relative to the fixed part 100 in a specific direction. In a modified example, the ball 400 of the first embodiment of the present invention may be replaced with a shaft. In this case, tilt of the moving part 200 may be prevented.

[0149] The lens driving device 10 may include a ball 400. The ball 400 can guide the movement of the moving unit 200 relative to the fixed unit 100 in the optical axis direction. The ball 400 can guide the movement of the holder 210 relative to the base 110 in the optical axis direction. The ball 400 may be disposed between the fixed unit 100 and the moving unit 200. The ball 400 may be disposed between the base 110 and the holder 210. The ball 400 may be disposed between the base 110 and the holder 210 in the x direction. Alternatively, the ball 400 may be disposed between the base 110 and the holder 210 in the y direction. The ball 400 may be disposed in the groove 114 of the base 110. The ball 400 may be disposed in the groove 212 of the holder 210. The ball 400 may be spherical. The ball 400 may be made of metal. Grease may be applied to the surface of the ball 400.

[0150] The distance between the ball 400 and the optical axis may be shorter than the distance between the repulsive magnet 500 and the optical axis. The distance between the ball 400 and the optical axis may be the same as the distance between the sensor 330 and the optical axis. Alternatively, the distance between the ball 400 and the optical axis may be the same as the distance between the coil 320 and the optical axis. The ball 400 may be disposed apart from the side plate 120 of the base 110. When viewed from above, the side plate 120 of the base 110, the first portion 211 of the holder 210, the ball 400, the column portion 113 of the base 110, the holder 210, and the side plate 120 of the base 110 may be disposed in this order on an imaginary straight line.

[0151] The ball 400 may include a plurality of balls. The ball 400 may include a plurality of unit balls. A total of six balls 400 may be provided in two sets of three balls each. The ball 400 may include a first ball 410 and a second ball 420. The first ball 410 may be arranged on an imaginary line connecting the optical axis and a first corner of the base 110. The second ball 410 may be arranged on an imaginary line connecting the optical axis and a second corner of the base 110. The first corner and the second corner of the base 110 may be arranged adjacent to each other. The first ball 410 may be arranged on one side of the drive magnet 310. The second ball 420 may be arranged on the other side of the drive magnet 310.

[0152] When viewed from above, the distance between the first ball 410 and the second ball 420 may be greater than the width of the drive magnet 310 .

[0153] The lens driving device 10 may include a repulsive magnet 500. The repulsive magnet 500 may be disposed on the fixed portion 100. The repulsive magnet 500 may be fixed to the fixed portion 100. The repulsive magnet 500 may be coupled to the fixed portion 100. The repulsive magnet 500 may be adhered to the fixed portion 100 with an adhesive. The repulsive magnet 500 may be disposed on the base 110. The repulsive magnet 500 may be fixed to the base 110. The repulsive magnet 500 may be coupled to the base 110. The repulsive magnet 500 may be adhered to the base 110 with an adhesive.

[0154] The repulsive magnet 500 may press the driving magnet 310 toward the ball 400. The repulsive magnet 500 may press the moving unit 200 toward the ball 400. The repulsive magnet 500 may press the holder 210 toward the ball 400. The repulsive magnet 500 may hold the ball 400 between the fixed unit 100 and the moving unit 200 through interaction with the driving magnet 310. A repulsive force may be generated between the repulsive magnet 500 and the driving magnet 310. The repulsive magnet 500 may be disposed such that a repulsive force is generated between the driving magnet 310 and the repulsive magnet 500. The repulsive magnet 500 may push the driving magnet 310. The repulsive magnet 500 may be formed such that the ball 400 is held between the fixed unit 100 and the moving unit 200. The repulsive magnet 500 can pressurize the drive magnet 310 so that the ball 400 is pressed between the fixed part 100 and the moving part 200 .

[0155] The repulsive magnet 500 can be spaced apart from the substrate 120. A gap (see gap in FIG. 20) can be formed between the repulsive magnet 500 and the substrate 120. Alternatively, the repulsive magnet 500 may be disposed on the substrate 120.

[0156] The repulsive magnet 500 can overlap with the drive magnet 310 in the x-axis direction. A portion of the repulsive magnet 500 can overlap with the drive magnet 310 in the x-axis direction. At least a portion of the repulsive magnet 500 can overlap with the drive magnet 310 in the x-axis direction. The repulsive magnet 500 can include a first portion that overlaps with the drive magnet 310 in the x-axis direction and a second portion that does not overlap with the drive magnet 310 in the x-axis direction. The second portion can protrude outward from the first portion. The second portion can protrude above and below the first portion. Alternatively, the repulsive magnet 500 can completely overlap with the drive magnet 310 in the x-axis direction. That is, the entire area of ​​the inner surface of the repulsive magnet 500 can completely overlap with the drive magnet 310 in the x-axis direction.

[0157] The repulsive magnet 500 can overlap the coil 320 in the y-axis direction, which is perpendicular to both the optical axis direction and the x-axis direction. The coil 320 can include a first portion that overlaps with the repulsive magnet 500 in the y-axis direction and a second portion that does not overlap. The coil 320 can be disposed between two repulsive magnets 500 in the y-axis direction. The coil 320 can be disposed between the first unit magnet 501 and the second unit magnet 502 in the y-axis direction. The repulsive magnet 500 can overlap the sensor 330 in the y-axis direction. The sensor 330 can be disposed between the two repulsive magnets 500 in the y-axis direction. The sensor 330 can be disposed between the first unit magnet 501 and the second unit magnet 502 in the y-axis direction.

[0158] The repulsive magnet 500 may include a plurality of magnets. The repulsive magnet 500 may include two magnets. The repulsive magnet 500 may include two magnets spaced apart from each other. The repulsive magnet 500 may include a first unit magnet 501. The repulsive magnet 500 may include a second unit magnet 502. The first unit magnet 501 may be disposed on one side of the coil 320. The second unit magnet 502 may be disposed on the other side of the coil 320.

[0159] The repulsive magnet 500 may be a four-pole magnet. The repulsive magnet 500 may include a four-pole magnetized magnet. The repulsive magnet 500 may include a lower magnet portion 510 including a north pole and a south pole. The repulsive magnet 500 may include an upper magnet portion 520 including a south pole and a north pole. The repulsive magnet 500 may include a neutral portion 530 disposed between the lower magnet portion 510 and the upper magnet portion 520. The length of the neutral portion 530 may be longer than the length of the lower magnet portion 510 in the optical axis direction. The length of the neutral portion 530 may be longer than the length of the upper magnet portion 520 in the optical axis direction. The length of the neutral portion 530 may be longer than the sum of the lengths of the lower magnet portion 510 and the upper magnet portion 520 in the optical axis direction. The length of the neutral portion 530 may be equal to the sum of the lengths of the lower magnet portion 510 and the upper magnet portion 520 in the optical axis direction. The length of the neutral portion 530 in the optical axis direction may be smaller than the sum of the lengths of the lower magnet portion 510 and the upper magnet portion 520.

[0160] The upper magnet part 520 may be disposed on the lower magnet part 510. The lower magnet part 510 and the upper magnet part 520 may be disposed in the optical axis direction. The lower magnet part 510 and the upper magnet part 520 may be spaced apart in the optical axis direction. A neutral part 530 may be disposed between the lower magnet part 510 and the upper magnet part 520.

[0161] The north pole of the lower magnet portion 510 of the repulsive magnet 500 may face the north pole of the lower magnet portion 311 of the driving magnet 310. The south pole of the upper magnet portion 520 of the repulsive magnet 500 may face the south pole of the upper magnet portion 312 of the driving magnet 310. In other words, the repulsive magnet 500 and the driving magnet 310 may be arranged such that the same poles face each other.

[0162] In the optical axis direction, the length of the neutral portion 530 of the repulsive magnet 500 may be longer than the length of the neutral portion 313 of the drive magnet 310 (see (a) of FIG. 21). In the optical axis direction, the length of the repulsive magnet 500 may be longer than the length of the drive magnet 310. In the optical axis direction, the length of the lower magnet portion 510 of the repulsive magnet 500 may be shorter than the length of the lower magnet portion 311 of the drive magnet 310. In the optical axis direction, the length of the upper magnet portion 520 of the repulsive magnet 500 may be shorter than the length of the upper magnet portion 312 of the drive magnet 310.

[0163] When the drive magnet 310 moves to the downward position in the optical axis direction to the maximum extent, the first boundary between the lower magnet portion 311 of the drive magnet 310 and the neutral portion 313 of the drive magnet 310 can be positioned at the same height as the 3 / 4 point from the top of the neutral portion 530 of the repulsive magnet 500, i.e., the 75% point (c in Figure 21(c)) (see Figure 21(c)).

[0164] When the drive magnet 310 moves to the downward position in the optical axis direction to its maximum extent, the first boundary between the lower magnet portion 311 of the drive magnet 310 and the neutral portion 313 of the drive magnet 310 can be positioned at the same height as or lower than the first boundary between the lower magnet portion 510 of the repulsive magnet 500 and the neutral portion 530 of the repulsive magnet 500.

[0165] When the drive magnet 310 moves to the downward position in the optical axis direction to the maximum extent, the first boundary between the lower magnet portion 510 of the repulsive magnet 500 and the neutral portion 530 of the repulsive magnet 500 can be positioned at the same height as the first boundary between the lower magnet portion 311 of the drive magnet 310 and the neutral portion 313 of the drive magnet 310.

[0166] When the drive magnet 310 moves to the downward position in the optical axis direction to the maximum extent, the first boundary between the lower magnet portion 510 of the repulsive magnet 500 and the neutral portion 530 of the repulsive magnet 500 can be positioned at a height lower than the first boundary between the lower magnet portion 311 of the drive magnet 310 and the neutral portion 313 of the drive magnet 310.

[0167] When the drive magnet 310 moves to the upper side in the optical axis direction to the maximum extent, the second boundary between the upper magnet portion 312 of the drive magnet 310 and the neutral portion 313 of the drive magnet 310 can be positioned at the same height as the 1 / 4 point from the top of the neutral portion 530 of the repulsive magnet 500, i.e., the 25% point (b in Figure 21(b)) (see (b) in Figure 21).

[0168] When the drive magnet 310 moves to the upper side in the optical axis direction to the maximum extent, the second boundary between the upper magnet portion 312 of the drive magnet 310 and the neutral portion 313 of the drive magnet 310 can be positioned at the same height as or higher than the second boundary between the upper magnet portion 520 of the repulsive magnet 500 and the neutral portion 530 of the repulsive magnet 500.

[0169] When the drive magnet 310 moves to the upper side in the optical axis direction to the maximum extent, the second boundary between the upper magnet portion 520 of the repulsive magnet 500 and the neutral portion 530 of the repulsive magnet 500 can be positioned at the same height as the second boundary between the upper magnet portion 312 of the drive magnet 310 and the neutral portion 313 of the drive magnet 310.

[0170] When the drive magnet 310 moves to the upper side in the optical axis direction to the maximum extent, the second boundary between the upper magnet portion 520 of the repulsive magnet 500 and the neutral portion 530 of the repulsive magnet 500 can be positioned at a height higher than the second boundary between the upper magnet portion 312 of the drive magnet 310 and the neutral portion 313 of the drive magnet 310.

[0171] In the first embodiment of the present invention, through the above-mentioned structure, even when the driving magnet 310 moves, it is possible to prevent the opposite polarities of the driving magnet 310 and the repulsive magnet 500 from being arranged to face each other.

[0172]

[0173] Hereinafter, autofocus (AF) driving of a lens driving device according to a first embodiment of the present invention will be described with reference to the drawings.

[0174] 23 to 25 are diagrams illustrating autofocus driving of the lens driving device according to the first embodiment of the present invention. Fig. 23 is a cross-sectional view showing the state of the moving part in the initial state when no current is applied to the coil. Fig. 24 is a cross-sectional view showing the state when a forward current is applied to the coil and the moving part has moved upward in the optical axis direction. Fig. 25 is a cross-sectional view showing the state when a reverse current is applied to the coil and the moving part has moved downward in the optical axis direction.

[0175] As shown in FIG. 23, the moving part 200 can be disposed at a position separated from both the upper plate 131 of the cover 130 and the base 110 in an initial position where no current is applied to the coil 320 .

[0176] When a forward current is applied to the coil 320, the drive magnet 310 can move upward in the optical axis direction due to electromagnetic interaction between the coil 320 and the drive magnet 310 (see A in FIG. 24). At this time, the holder 210 can move upward in the optical axis direction together with the drive magnet 310. Furthermore, the lens can move upward in the optical axis direction together with the holder 210. This changes the distance between the lens and the image sensor, and the focus of the image formed on the image sensor through the lens can be adjusted.

[0177] When a reverse current is applied to the coil 320, the drive magnet 310 can move downward in the optical axis direction due to electromagnetic interaction between the coil 320 and the drive magnet 310 (see B in FIG. 25). At this time, the holder 210 can move downward in the optical axis direction together with the drive magnet 310. Furthermore, the lens can move downward in the optical axis direction together with the holder 210. This changes the distance between the lens and the image sensor, and the focus of the image formed on the image sensor through the lens can be adjusted.

[0178] Meanwhile, during the movement of the driving magnet 310, the sensor 330 can sense the movement amount and position of the lens in the optical axis direction by sensing the strength of the magnetic field of the driving magnet 310. The movement amount and position of the lens in the optical axis direction sensed by the sensor 330 can be used for autofocus feedback control.

[0179]

[0180] A camera device according to a first embodiment of the present invention will be described below with reference to the drawings.

[0181] FIG. 26 is an exploded perspective view of the camera device according to the first embodiment of the present invention.

[0182] The camera device 10A can include a camera module.

[0183] The camera device 10A may include a lens module 20. The lens module 20 may include at least one lens. The lens may be disposed at a position corresponding to the image sensor 60. The lens module 20 may include a lens and a barrel. The lens module 20 may be coupled to a holder 210 of the lens driving device 10. The lens module 20 may be coupled to the holder 210 by screwing and / or adhesive. The lens module 20 may move integrally with the holder 210.

[0184] The camera device 10A may include a filter 30. The filter 30 can serve to block light of a specific frequency band from passing through the lens module 20 and entering the image sensor 60. The filter 30 can be arranged parallel to the xy plane. The filter 30 can be arranged between the lens module 20 and the image sensor 60. The filter 30 can be arranged on the sensor base 40. Alternatively, the filter 30 can be arranged on the base 110. The filter 30 can include an infrared filter. The infrared filter can block light in the infrared region from entering the image sensor 60.

[0185] The camera device 10A may include a sensor base 40. The sensor base 40 may be disposed between the lens driver 10 and the printed circuit board 50. The sensor base 40 may include a protrusion 41 on which the filter 30 is disposed. An opening may be formed in the portion of the sensor base 40 on which the filter 30 is disposed so that light passing through the filter 30 can enter the image sensor 60. An adhesive may bond or adhere the base 110 of the lens driver 10 to the sensor base 40. The adhesive may also serve to prevent foreign matter from entering the interior of the lens driver 10. The adhesive may include one or more of epoxy, a heat-curable adhesive, and an ultraviolet-curable adhesive.

[0186] In a modified example, the sensor base 40 may be omitted. In this case, the filter 30 may be coupled to the base 110 of the lens driving device 10. The filter 30 may be coupled to the underside of the base 110 of the lens driving device 10. Also, in a modified example, the sensor holder 40 may be formed to protect only the image sensor 60. That is, the base 110 of the lens driving device 10 may be directly disposed on the printed circuit board 50. In this case, the sensor holder 40 may be disposed within the base 110. The base 110 may be formed to surround the sensor holder 40. The base 110 may include legs that are outer walls that are placed on the printed circuit board 50.

[0187] The camera device 10A may include a printed circuit board (PCB) 50. The printed circuit board 50 may be a substrate or a circuit board. The lens driver 10 may be disposed on the printed circuit board 50. A sensor base 40 may be disposed between the printed circuit board 50 and the lens driver 10. The printed circuit board 50 may be electrically connected to the lens driver 10. An image sensor 60 may be disposed on the printed circuit board 50. The printed circuit board 50 may include various circuits, elements, a control unit, etc. for converting an image formed on the image sensor 60 into an electrical signal and transmitting the signal to an external device.

[0188] The camera device 10A may include an image sensor 60. The image sensor 60 may be configured to form an image when light passing through the lens and the filter 30 is incident on it. The image sensor 60 may be mounted on a printed circuit board 50. The image sensor 60 may be electrically connected to the printed circuit board 50. For example, the image sensor 60 may be attached to the printed circuit board 50 using surface mounting technology (SMT). For another example, the image sensor 60 may be attached to the printed circuit board 50 using flip chip technology. The image sensor 60 may be disposed so that its optical axis coincides with that of a lens. That is, the optical axis of the image sensor 60 and the optical axis of the lens may be aligned. The image sensor 60 may convert light irradiated onto an effective image area of ​​the image sensor 60 into an electrical signal. The image sensor 60 may be any one of a charge coupled device (CCD), a metal oxide semiconductor (MOS), a CPD, and a CID.

[0189] The camera device 10A may include a motion sensor 70. The motion sensor 70 may be mounted on the printed circuit board 50. The motion sensor 70 may be electrically connected to the control unit 80 via a circuit pattern provided on the printed circuit board 50. The motion sensor 70 may output rotational angular velocity information according to the movement of the camera device 10A. The motion sensor 70 may include a two-axis or three-axis gyro sensor or an angular velocity sensor.

[0190] The camera device 10A may include a control unit 80. The control unit 80 may be disposed on the printed circuit board 50. The control unit 80 may be electrically connected to the coils 310 of the lens driving device 10. The control unit 80 may individually control the direction, strength, amplitude, etc. of the current supplied to the coils 310. The control unit 80 may control the lens driving device 10 to perform an autofocus function and / or an image stabilization function. Furthermore, the control unit 80 may perform autofocus feedback control and / or image stabilization feedback control for the lens driving device 10.

[0191] The camera device 10A may include a connector 90. The connector 90 may be electrically connected to the printed circuit board 50. The connector 90 may include a port for electrically connecting to an external device.

[0192]

[0193] An optical device according to a first embodiment of the present invention will be described below with reference to the drawings.

[0194] Fig. 27 is a perspective view of the optical apparatus according to the first embodiment of the present invention, and Fig. 28 is a perspective view of an optical apparatus according to a modified example.

[0195] The optical device 1 may include one or more of a mobile phone, a portable terminal, a mobile terminal, a smartphone, a smart pad, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistant), a PMP (Portable Multimedia Player), and a navigation system. The optical device 1 may include any device for taking images or photographs.

[0196] The optical device 1 may include a main body 20. The optical device 1 may include a camera device 10A. The camera device 10A may be disposed in the main body 20. The camera device 10A may photograph an object. The optical device 1 may include a display. The display may be disposed in the main body 20. The display may output one or more of a video and an image photographed by the camera device 10A. The display may be disposed on a first surface of the main body 20. The camera device 10A may be disposed on one or more of the first surface and a second surface opposite the first surface of the main body 20. As shown in FIG. 27, the camera device 10A may have a triple camera disposed vertically. As shown in FIG. 28, the camera device 10A-1 may have a triple camera disposed horizontally.

[0197]

[0198] The configuration of a lens driving device according to a second embodiment of the present invention will be described below with reference to the drawings.

[0199] FIG. 29 is a perspective view of a lens driving device according to a second embodiment of the present invention. FIG. 30 is a cross-sectional view taken along line AA in FIG. 29. FIG. 31 is a cross-sectional view taken along line BB in FIG. 29. FIGS. 32 to 34 are cross-sectional perspective views of the lens driving device according to the second embodiment of the present invention, cut at different portions. FIG. 35 is a cross-sectional view of the lens driving device according to the second embodiment of the present invention, cut perpendicular to the optical axis and viewed from above. FIG. 36 is an exploded perspective view of the lens driving device according to the second embodiment of the present invention. FIG. 37 is an exploded perspective view seen from a different direction from FIG. 36. FIG. 38 is a perspective view of the lens driving device according to the second embodiment of the present invention, with the cover omitted. FIG. 39 is a perspective view of FIG. 38, with the moving unit and related components omitted. FIG. 40 is a perspective view of FIG. 39, with the balls, substrate, and repulsive magnets omitted from FIG. 40. FIG. 41 is a perspective view of FIG. 40, with the balls, substrate, and repulsive magnets omitted. FIG. 42 is a perspective view showing the moving unit and related components of the lens driving device according to the second embodiment of the present invention. FIG. 43 is a perspective view of FIG. 42, with the balls, substrate, and repulsive magnets omitted. FIG. 44 is a front view showing the moving unit, driving unit, and repulsive magnet of a lens driving device according to a second embodiment of the present invention. FIG. 45 is a cross-sectional perspective view showing the drive magnet and repulsive magnet and related components of a lens driving device according to a second embodiment of the present invention. FIG. 46 is a perspective view of the drive magnet and repulsive magnet of a lens driving device according to a second embodiment of the present invention. FIG. 47 is a view showing the drive magnet and repulsive magnet of a lens driving device according to a second embodiment of the present invention. (a) is a view showing the drive magnet and repulsive magnet before the drive magnet moves, i.e., in the initial state. (b) is a view showing the drive magnet and repulsive magnet when the drive magnet has moved maximally upward in the optical axis direction. (c) is a view showing the drive magnet and repulsive magnet when the drive magnet has moved maximally downward in the optical axis direction. FIG. 48 is a cross-sectional view for comparing the distances between the optical axis and each component in a lens driving device according to a second embodiment of the present invention.

[0200] The lens driver 1010 may be a voice coil motor (VCM). The lens driver 1010 may be a lens drive motor. The lens driver 1010 may be a lens drive actuator. The lens driver 1010 may include an AF module. The lens driver 1010 may include an AF actuator.

[0201] The lens driving device 1010 may include a fixed part 1100. The fixed part 1100 may be a part that is fixed relative to the moving part 1200 when the moving part 1200 moves. The moving part 1200 may move relative to the fixed part 1100.

[0202] The lens driving device 1010 may include a base 1110. The fixed part 1100 may include a base 1110. The base 1110 may be disposed below the holder 1210. The base 1110 may be coupled to the cover 1130. The holder 1210 may be disposed on the base 1110. The holder 1210 may be disposed on a bottom plate 1111 of the base 1110. The holder 1210 may be disposed within the base 1110. The holder 1210 may be disposed within a side plate 1112 of the base 1110.

[0203] The base 1110 may include a lower plate 1111. The lower plate 1111 of the base 1110 may support a lower surface of the moving unit 1200. The lower plate 1111 of the base 1110 may support a lower surface of the holder 1210. The lower plate 1111 of the base 1110 may function as a lower stopper for the moving unit 1200. The lower plate 1111 of the base 1110 may function as a lower stopper for the holder 1210.

[0204] The base 1110 may include side plates 1112. The side plates 1112 may be 'side portions'. The side plates 1112 may be 'side walls'. The side plates 1112 of the base 1110 may extend from the upper surface of the lower plate 1111. The side plates 1112 may include a plurality of side plates. The side plates 1112 may include four side plates. The side plates 1112 may include first to fourth side plates. The side plates 1112 may include a first side plate and a second side plate arranged opposite to each other, and a third side plate and a fourth side plate arranged opposite to each other.

[0205] The base 1110 may include a post 1113. The post 1113 may extend from the top surface of the bottom plate 1111. The post 1113 may extend inward from the side plate 1112. A ball 1400 may be disposed in the post 1113. The post 1113 may have a groove 1114 formed therein in which the ball 1400 is disposed. The post 1113 may be referred to as a 'protrusion'.

[0206] The fixed portion 1100 may include a first sidewall on which the coil 1320 is disposed, a second sidewall disposed opposite the first sidewall, and a protrusion disposed to overlap between the first sidewall and the second sidewall in a first direction in which the first sidewall faces the second sidewall. In this case, the protrusion may be a pillar portion 1113. The moving portion 1200 may include a protrusion disposed between the first sidewall and the protrusion of the fixed portion 1100 in the first direction. The ball 1400 may be disposed between the protrusion of the moving portion 1200 and the protrusion of the fixed portion 1100.

[0207] The base 1110 may include a groove 1114. The post 1113 may include a groove 1114. The groove 1114 may be formed in the post 1113. The groove 1114 may be a 'ball-receiving groove'. A ball 1400 may be disposed in the groove 1114. The groove 1114 may be in direct contact with the ball 1400. The groove 1114 may be disposed in the optical axis direction. The groove 1114 may include multiple grooves. The groove 1114 may include two grooves. The two grooves may be disposed parallel to each other.

[0208] The base 1110 may include a groove 1115. The groove 1115 may be a 'substrate and repulsive magnet accommodation groove'. The substrate 1120 may be disposed in the groove 1115. The repulsive magnet 1500 may be disposed in the groove 1115. The groove 1115 may include a shape corresponding to the substrate 1120. The groove 1115 may be formed in the outer surface of the side plate 1112 of the base 1110. The depth of the groove 1115 may be greater than the thickness of the repulsive magnet 1500.

[0209] The base 1110 may include a step 1116. The step 1116 may be formed at a lower end of an outer surface of the base 1110. The step 1116 may protrude from the outer surface of the base 1110. A side plate 1132 of the cover 1130 may be disposed on the step 1116 of the base 1110.

[0210] The base 1110 may include a protrusion 1117. The protrusion 1117 may be a 'substrate coupling protrusion'. The protrusion 1117 may be inserted into a hole in the substrate 1120. The protrusion 1117 may be coupled to the substrate 1120. The protrusion 1117 may fix the substrate 1120. The protrusion 1117 may be formed on the side plate 1112. The protrusion 1117 may be formed to protrude from the outer surface of the base 1110. The protrusion 1117 may include multiple protrusions. The protrusion 1117 may include two protrusions.

[0211] One of the "groove 1114" and the "groove 1115" of the base 1110 may be referred to as a "first groove," and the other may be referred to as a "second groove."

[0212] The lens driving device 1010 may include a substrate 1120. The fixed portion 1100 may include the substrate 1120. The substrate 1120 may be arranged on the fixed portion 1100. The substrate 1120 may be arranged on the base 1110. The substrate 1120 may be arranged on a side plate 1112 of the base 1110. The substrate 1120 may be arranged on an outer surface of the side plate 1112 of the base 1110. The substrate 1120 may be arranged on a cover 1130. The substrate 1120 may be arranged on a side plate 1132 of the cover 1130. The substrate 1120 may be arranged on an inner surface of the side plate 1132 of the cover 1130. The substrate 1120 may be arranged on an outer surface of the side plate 1132 of the cover 1130. The substrate 1120 may be arranged parallel to the optical axis. A coil 1320 and a sensor 1330 may be arranged on the substrate 1120. The substrate 1120 may have a repulsive magnet 1500 disposed thereon. The substrate 1120 may include a printed circuit board. The substrate 1120 may include a flexible printed circuit board (FPCB).

[0213] The substrate 1120 may include terminals 1121. The terminals 1121 may be formed on a lower end of the outer surface of the substrate 1120. The terminals 1121 of the substrate 1120 may be coupled to the printed circuit board 1050 of the camera device 1010A. The terminals 1121 of the substrate 1120 may be electrically connected to the printed circuit board 1050 of the camera device 1010A. The terminals 1121 of the substrate 1120 may be coupled to the printed circuit board 1050 of the camera device 1010A by solder. The terminals 1121 may include a plurality of terminals. The terminals 1121 may include five terminals. The terminals 1121 may include a terminal electrically connected to the sensor 1330. The terminals 1121 may include a ground terminal for grounding. The terminals 1121 may include a terminal electrically connected to the coil 1320. At least a portion of the terminals 1121 may be exposed to the outside.

[0214] The lens driving device 1010 may include a cover 1130. The fixed part 1100 may include the cover 1130. The cover 1130 may be disposed on the base 1110. The cover 1130 may be coupled to the base 1110. The cover 1130 may be fixed to the base 1110. The cover 1130 may house the holder 1210 inside. The cover 1130 may be a shielding member. The cover 1130 may be a shielding can.

[0215] The cover 1130 may include an upper plate 1131. The upper plate 1131 of the cover 1130 may function as an upper stopper for the moving unit 1200. The upper plate 1131 of the cover 1130 may function as an upper stopper for the holder 1210. The upper plate 1131 may be disposed on the moving unit 1200. The upward movement of the moving unit 1200 may be limited by the moving unit 1200 coming into contact with the upper plate 1131. The upper plate 1131 may include a hole through which light passes.

[0216] The cover 1130 may include side plates 1132. The side plates 1132 may extend from the upper plate 1131. The side plates 1132 may be disposed on the base 1110. The side plates 1132 may be disposed on a step 1116 formed to protrude from a lower end of the outer surface of the base 1110. The side plates 1132 may include a plurality of side plates. The side plates 1132 may include four side plates. The side plates 1132 may include a first side plate and a second side plate disposed opposite each other, and a third side plate and a fourth side plate disposed opposite each other.

[0217] The lens driving device 1010 may include a moving unit 1200. The moving unit 1200 may be disposed in the fixed unit 1100. The moving unit 1200 may be disposed within the fixed unit 1100. The moving unit 1200 may be disposed on the fixed unit 1100. The moving unit 1200 may be movably disposed on the fixed unit 1100. The moving unit 1200 may be moved with respect to the fixed unit 1100 by the driving unit 1300. The moving unit 1200 may be moved in the optical axis direction relative to the fixed unit 1100 by the driving unit 1300. The moving unit 1200 may be disposed within the fixed unit 1100 movably in the optical axis direction. The moving unit 1200 may move in the optical axis direction. The moving unit 1200 may move during AF driving. A lens may be coupled to the moving unit 1200.

[0218] The lens driving device 1010 may include a holder 1210. The moving part 1200 may include a holder 1210. The holder 1210 may be an 'AF holder'. The holder 1210 may be a 'bobbin'. The holder 1210 may be a 'carrier'. The holder 1210 may be disposed within the base 1110. The holder 1210 may be disposed on the base 1110. The holder 1210 may be disposed within the cover 1130. The holder 1210 may be disposed movably. The holder 1210 may be disposed movably in the optical axis direction.

[0219] The holder 1210 may include a first portion 1211. The first portion 1211 may be disposed between the side plate 1112 and the post portion 1113 of the base 1110. A ball 1400 may be disposed in the first portion 1211 of the holder 1210. A groove 1212 in which the ball 1400 is disposed may be formed in the first portion 1211 of the holder 1210.

[0220] The holder 1210 may include a groove 1212. The groove 1212 may be a 'ball-receiving groove'. The ball 1400 may be disposed in the groove 1212. The groove 1212 may be in direct contact with the ball 1400. The groove 1212 may be disposed in the optical axis direction. The groove 1212 may guide the ball 1400 to move in the optical axis direction. The groove 1212 may include a plurality of grooves. The groove 1212 may include two grooves. The two grooves may be disposed parallel to each other. The groove 1212 of the holder 1210 may be disposed to face the groove 1114 of the base 1110. The ball 1400 may be disposed between the groove 1212 of the holder 1210 and the groove 1114 of the base 1110.

[0221] The holder 1210 may include a groove 1213. The groove 1213 may be a 'drive magnet accommodating groove'. The groove 1213 may be formed on the outer surface of the holder 1210. The groove 1213 may be formed in a concave shape on the side surface of the holder 1210. The drive magnet 1310 may be disposed in the groove 1213. The groove 1213 may be formed in a shape corresponding to the drive magnet 1310. The groove 1213 may be recessed to a depth equal to the thickness of the drive magnet 1310.

[0222] One of the "groove 1212" and the "groove 1213" of the holder 1210 can be referred to as a "first groove" and the other as a "second groove."

[0223] The lens driving device 1010 may include a driving unit 1300. The driving unit 1300 may move the moving unit 1200 in the optical axis direction. The driving unit 1300 may move the holder 1210 in the optical axis direction. The driving unit 1300 may move the holder 1210 in the optical axis direction through electromagnetic force. The driving unit 1300 may include a driving magnet 1310 and a coil 1320. The driving magnet 1310 and the coil 1320 may move the moving unit 1200 in the optical axis direction.

[0224] The lens driving device 1010 may include a driving magnet 1310. The driving unit 1300 may include a driving magnet 1310. The driving magnet 1310 may be disposed in the moving unit 1200. The driving magnet 1310 may be disposed in the holder 1210. The driving magnet 1310 may be fixed to the holder 1210. The driving magnet 1310 may be coupled to the holder 1210. The driving magnet 1310 may be adhered to the holder 1210 with an adhesive. The driving magnet 1310 may be disposed within the cover 1130. The driving magnet 1310 may be disposed between the coil 1320 and the holder 1210. The driving magnet 1310 may be disposed inside the coil 1320.

[0225] The drive magnet 1310 can overlap the coil 1320 in a direction perpendicular to the optical axis. The drive magnet 1310 can be arranged to overlap the coil 1320 in an x-axis direction perpendicular to the optical axis direction. The drive magnet 1310 can face the coil 1320 in the x-axis direction perpendicular to the optical axis direction. The drive magnet 1310 can be arranged to face the coil 1320. The drive magnet 1310 can be arranged to face the coil 1320 in the x-axis direction perpendicular to the optical axis direction. The drive magnet 1310 can face the coil 1320. The drive magnet 1310 can be arranged at a position corresponding to the coil 1320. The drive magnet 1310 can interact with the coil 1320. The drive magnet 1310 can electromagnetically interact with the coil 1320. The drive magnet 1310 can move. The drive magnet 1310 can be arranged to be movably arranged. The drive magnet 1310 can move during AF drive. The drive magnet 1310 can move together with the holder 1210. The drive magnet 1310 can move in the optical axis direction. When a current is applied to the coil 1320, the drive magnet 1310 can move in the optical axis direction.

[0226] The drive magnet 1310 may be a four-pole magnet. The drive magnet 1310 may include a four-pole magnetized magnet. The drive magnet 1310 may include a lower magnet portion 1311 including a north pole and a south pole. The drive magnet 1310 may include an upper magnet portion 1312 including a south pole and a north pole. The drive magnet 1310 may include a neutral portion 1313 disposed between the lower magnet portion 1311 and the upper magnet portion 1312.

[0227] The upper magnet portion 1312 may be disposed on the lower magnet portion 1311. The lower magnet portion 1311 and the upper magnet portion 1312 may be disposed in the optical axis direction. The lower magnet portion 1311 and the upper magnet portion 1312 may be spaced apart in the optical axis direction. A neutral portion 1313 may be disposed between the lower magnet portion 1311 and the upper magnet portion 1312.

[0228] The lens driving device 1010 may include a coil 1320. The driving unit 1300 may include a coil 1320. The coil 1320 may be disposed on the substrate 1120. The coil 1320 may be disposed on the inner surface of the substrate 1120. The coil 1320 may be disposed on the fixed unit 1100. The coil 1320 may be disposed on the base 1110. The coil 1320 may be disposed on the cover 1130. The coil 1320 may be disposed on the outside of the driving magnet 1310. The coil 1320 may be disposed between the side plate 1132 of the cover 1130 and the driving magnet 1310. The coil 1320 may be fixed. The coil 1320 may be maintained in a fixed state even during AF driving. The coil 1320 may interact with the driving magnet 1310. The coil 1320 may face the driving magnet 1310. The coil 1320 can face the drive magnet 1310. The coil 1320 can be disposed at a position corresponding to the drive magnet 1310. The coil 1320 can overlap the drive magnet 1310 in a direction perpendicular to the optical axis. The coil 1320 can overlap the drive magnet 1310 in the x-axis direction perpendicular to the optical axis direction.

[0229] The lens driving device 1010 may include a sensor 1330. The driving unit 1300 may include the sensor 1330. The sensor 1330 may sense the driving magnet 1310. The sensor 1330 may be disposed on the substrate 1120. The sensor 1330 may be disposed within the coil 1320. The sensor 1330 may be a Hall sensor. The amount of movement or position of the driving magnet 1310 sensed by the sensor 1330 may be used for feedback of the autofocus drive.

[0230] Alternatively, the sensor 1330 may be a driver IC. The driver IC may include a Hall element that senses the drive magnet 1310. The driver IC may include a sensing unit. The sensing unit may include a Hall element (Hall IC). The driver IC may be electrically connected to the coil 1320. The driver IC may apply a current to the coil 1320.

[0231] The lens driver 1010 may include a capacitor 1340. The driver 1300 may include a capacitor 1340. The capacitor 1340 may be disposed on the substrate 1120. The capacitor 1340 may be disposed within the coil 1320. The capacitor 1340 may be disposed next to the sensor 1330. The capacitor 1340 may be used to remove noise sensed by the sensor 1330.

[0232] The lens driving device 1010 may include a guide member. The guide member may include a ball 1400. The guide member may include a shaft. The guide member may include a pin. The guide member may include a cylindrical member. The guide member may guide the movement of the moving part 1200 relative to the fixed part 1100 in a specific direction. In a modified example, the ball 1400 of the second embodiment of the present invention may be replaced with a shaft. In this case, tilt of the moving part 1200 may be prevented.

[0233] The lens driving device 1010 may include a ball 1400. The ball 1400 can guide the movement of the moving part 1200 relative to the fixed part 1100 in the optical axis direction. The ball 1400 can guide the movement of the holder 1210 relative to the base 1110 in the optical axis direction. The ball 1400 may be disposed between the fixed part 1100 and the moving part 1200. The ball 1400 may be disposed between the base 1110 and the holder 1210. The ball 1400 may be disposed between the base 1110 and the holder 1210 in the x direction. Alternatively, the ball 1400 may be disposed between the base 1110 and the holder 1210 in the y direction. The ball 1400 may be disposed in the groove 1114 of the base 1110. The ball 1400 may be disposed in the groove 1212 of the holder 1210. The ball 1400 may be spherical. The ball 1400 may be formed of metal. The ball 1400 may be made of a non-magnetic material, and the surface of the ball 1400 may be coated with grease.

[0234] As shown in FIG. 48 , the distance between the ball 1400 and the optical axis OA (see A in FIG. 48 ) may be the same as the distance between the repulsive magnet 1500 and the optical axis OA (see D in FIG. 48 ). As a variation, the distance between the ball 1400 and the optical axis OA (see A in FIG. 48 ) may be shorter than the distance between the repulsive magnet 1500 and the optical axis OA (see D in FIG. 48 ). As another variation, the distance between the ball 1400 and the optical axis OA (see A in FIG. 48 ) may be longer than the distance between the repulsive magnet 1500 and the optical axis OA (see D in FIG. 48 ). The distance between the ball 1400 and the optical axis OA may be the shortest distance. The distance between the ball 1400 and the optical axis OA may be the distance in a direction perpendicular to the optical axis OA. The distance between the repulsive magnet 1500 and the optical axis OA may be the shortest distance. The distance between the repulsive magnet 1500 and the optical axis OA may be the distance in a direction perpendicular to the optical axis OA.

[0235] As shown in Fig. 48, the distance between ball 1400 and optical axis OA (see A in Fig. 48) may be shorter than the distance between the end of drive magnet 1310 and optical axis OA (see B in Fig. 48). Also, as shown in Fig. 48, the distance between ball 1400 and optical axis OA (see A in Fig. 48) may be longer than the distance between the center of drive magnet 1310 and optical axis OA (see C in Fig. 48).

[0236] The ball 1400 may be separated from the optical axis by a first distance. At least a portion of the drive magnet 1310 may be separated from the optical axis by a distance greater than the first distance. The drive magnet 1310 may include a first region separated from the optical axis by a distance greater than the first distance. The drive magnet 1310 may include a second region separated from the optical axis by a distance smaller than the first distance. The drive magnet 1310 may include a third region separated from the optical axis by a first distance. In this case, the first region may be an end region of the drive magnet 1310, the second region may be a central region of the drive magnet 1310, and the third region may be a region of the drive magnet 1310 between the first and second regions. Alternatively, the distance between the ball 1400 and the optical axis may be smaller than the shortest distance between the drive magnet 1310 and the optical axis. That is, the ball 1400 may be positioned closer to the optical axis than the drive magnet 1310.

[0237] When viewed from above, the side plate 1112 of the base 1110, the first part 1211 of the holder 1210, the ball 1400, the column part 1113 of the base 1110, the holder 1210, and the side plate 1112 of the base 1110 may be arranged in this order on an imaginary straight line.

[0238] The ball 1400 may include a plurality of balls. The ball 1400 may include a plurality of unit balls. A total of six balls 1400 may be provided in two sets of three balls each. The ball 1400 may include a first ball 1410 and a second ball 1420. The first ball 1410 may be disposed on an imaginary line connecting the optical axis and a first corner of the base 1110. The second ball 1420 may be disposed on an imaginary line connecting the optical axis and a second corner of the base 1110. The first corner and the second corner of the base 1110 may be disposed adjacent to each other. The first ball 1410 may be disposed on one side of the drive magnet 1310. The second ball 1420 may be disposed on the other side of the drive magnet 1310.

[0239] When viewed from above, the distance between first ball 1410 and second ball 1420 may be greater than the width of drive magnet 1310.

[0240] The lens driving device 1010 may include a repulsive magnet 1500. The repulsive magnet 1500 may be disposed on the fixed portion 1100. The repulsive magnet 1500 may be fixed to the fixed portion 1100. The repulsive magnet 1500 may be coupled to the fixed portion 1100. The repulsive magnet 1500 may be glued to the fixed portion 1100 with an adhesive. The repulsive magnet 1500 may be disposed on the base 1110. The repulsive magnet 1500 may be fixed to the base 1110. The repulsive magnet 1500 may be coupled to the base 1110. The repulsive magnet 1500 may be glued to the base 1110 with an adhesive. The repulsive magnet 1500 may be disposed on the substrate 1120. The repulsive magnet 1500 may be fixed to the substrate 1120. The repulsive magnet 1500 may be bonded to the substrate 1120. The repulsive magnet 1500 may be adhered to the substrate 1120 with an adhesive. The repulsive magnet 1500 may be disposed on the outer surface of the substrate 1120. The repulsive magnet 1500 may be disposed on the cover 1130. The repulsive magnet 1500 may be fixed to the cover 1130. The repulsive magnet 1500 may be bonded to the cover 1130. The repulsive magnet 1500 may be adhered to the cover 1130 with an adhesive. The repulsive magnet 1500 may be disposed on a step in the base 1110. The repulsive magnet 1500 may be disposed in a groove formed in a recessed shape on the side surface of the base 1110.

[0241] The repulsive magnet 1500 can press the driving magnet 1310 in the direction of the ball 1400. The repulsive magnet 1500 can press the moving unit 1200 in the direction of the ball 1400. The repulsive magnet 1500 can press the holder 1210 in the direction of the ball 1400. The repulsive magnet 1500 can sandwich the ball 1400 between the fixed unit 1100 and the moving unit 1200 through interaction with the driving magnet 1310. The repulsive magnet 1500 can closely contact the ball 1400 between the fixed unit 1100 and the moving unit 1200 through interaction with the driving magnet 1310. The repulsive magnet 1500 can exert a repulsive force on the driving magnet 1310. A repulsive force can be generated between the repulsive magnet 1500 and the driving magnet 1310. The repulsive magnet 1500 may be arranged so that a repulsive force occurs between it and the drive magnet 1310. The repulsive magnet 1500 may push out the drive magnet 1310. The repulsive magnet 1500 may be formed so that the ball 1400 is sandwiched between the fixed part 1100 and the moving part 1200. The repulsive magnet 1500 may pressurize the drive magnet 1310 so that the ball 1400 is pressed between the fixed part 1100 and the moving part 1200.

[0242] The coil 1320 can overlap the repulsive magnet 1500 in the x-axis direction. At least a portion of the coil 1320 can be disposed between the drive magnet 1310 and the repulsive magnet 1500 in the x-axis direction. The distance between the upper and lower ends of the coil 1320 can be 60 to 80% of the distance between the upper and lower ends of the repulsive magnet 1500. The distance between the upper and lower ends of the coil 1320 can be 65 to 75% of the distance between the upper and lower ends of the repulsive magnet 1500.

[0243] The length of the repulsive magnet 1500 may be longer than the length of the drive magnet 1310 in the optical axis direction. The upper surface of the repulsive magnet 1500 may be positioned higher than the upper surface of the drive magnet 1310. In an initial position where no current is applied to the coil 1320, the upper surface of the repulsive magnet 1500 may be positioned higher than the upper surface of the drive magnet 1310. The lower surface of the repulsive magnet 1500 may be positioned lower than the lower surface of the drive magnet 1310. In an initial position where no current is applied to the coil 1320, the lower surface of the repulsive magnet 1500 may be positioned lower than the lower surface of the drive magnet 1310.

[0244] The length of the repulsive magnet 1500 in the y-axis direction may be 15 to 40% of the length of the drive magnet 1310. Alternatively, the length of the repulsive magnet 1500 in the y-axis direction may be 10 to 50% of the length of the drive magnet 1310.

[0245] The thickness of the repulsive magnet 1500 in the x-axis direction may be smaller than the thickness of the drive magnet 1310. The thickness of the repulsive magnet 1500 in the x-axis direction may be 70 to 90% of the thickness of the drive magnet 1310. The thickness of the repulsive magnet 1500 in the x-axis direction may be 75 to 85% of the thickness of the drive magnet 1310. Alternatively, the thickness of the repulsive magnet 1500 in the x-axis direction may be the same as the thickness of the drive magnet 1310. Alternatively, the thickness of the repulsive magnet 1500 in the x-axis direction may be larger than the thickness of the drive magnet 1310.

[0246] The length of the upper magnet portion 1520 of the repulsive magnet 1500 in the optical axis direction may be 10 to 50% of the length of the neutral portion 1530 of the repulsive magnet 1500. The length of the upper magnet portion 1520 of the repulsive magnet 1500 in the optical axis direction may be 20 to 40% of the length of the neutral portion 1530 of the repulsive magnet 1500. If the length of the upper magnet portion 1520 is smaller than the mentioned threshold, the repulsive force is weak, resulting in insufficient ball pressing force, and if it is larger than the mentioned threshold, a problem may occur in which an attractive force is generated in some areas when the drive magnet 1310 moves.

[0247] When a forward current is applied to the coil 1320 and the moving part 1200 moves to the upper side in the optical axis direction to the maximum extent, the upper end of the neutral part 1313 of the drive magnet 1310 can be positioned at the same height as the upper end of the neutral part 1530 of the repulsive magnet 1500. When a reverse current is applied to the coil 1320 and the moving part 1200 moves to the lower side in the optical axis direction to the maximum extent, the lower end of the neutral part 1313 of the drive magnet 1310 can be positioned at the same height as the lower end of the neutral part 1530 of the repulsive magnet 1500.

[0248] The repulsive magnet 1500 can overlap with the drive magnet 1310 in the x-axis direction. A portion of the repulsive magnet 1500 can overlap with the drive magnet 1310 in the x-axis direction. At least a portion of the repulsive magnet 1500 can overlap with the drive magnet 1310 in the x-axis direction. The repulsive magnet 1500 can include a first portion that overlaps with the drive magnet 1310 in the x-axis direction and a second portion that does not overlap with the drive magnet 1310 in the x-axis direction. The second portion can protrude above and below the first portion.

[0249] The repulsive magnet 1500 may be a four-pole magnet. The repulsive magnet 1500 may include a four-pole magnetized magnet. The repulsive magnet 1500 may include a lower magnet portion 1510 including a north pole and a south pole. The repulsive magnet 1500 may include an upper magnet portion 1520 including a south pole and a north pole. The repulsive magnet 1500 may include a neutral portion 1530 disposed between the lower magnet portion 1510 and the upper magnet portion 1520. The length of the neutral portion 1530 in the optical axis direction may be longer than the length of the lower magnet portion 1510. The length of the neutral portion 1530 in the optical axis direction may be longer than the length of the upper magnet portion 1520. The length of the neutral portion 1530 in the optical axis direction may be longer than the sum of the lengths of the lower magnet portion 1510 and the upper magnet portion 1520. The length of the neutral portion 1530 in the optical axis direction may be the same as the sum of the lengths of the lower magnet portion 1510 and the upper magnet portion 1520. The length of the neutral portion 1530 in the optical axis direction may be smaller than the sum of the lengths of the lower magnet portion 1510 and the upper magnet portion 1520.

[0250] The upper magnet portion 1520 may be disposed on the lower magnet portion 1510. The lower magnet portion 1510 and the upper magnet portion 1520 may be disposed in the optical axis direction. The lower magnet portion 1510 and the upper magnet portion 1520 may be spaced apart in the optical axis direction. A neutral portion 1530 may be disposed between the lower magnet portion 1510 and the upper magnet portion 1520.

[0251] The north pole of the lower magnet portion 1510 of the repulsive magnet 1500 may face the north pole of the lower magnet portion 1311 of the driving magnet 1310. The south pole of the upper magnet portion 1520 of the repulsive magnet 1500 may face the south pole of the upper magnet portion 1312 of the driving magnet 1310. In other words, the repulsive magnet 1500 and the driving magnet 1310 may be arranged so that the same poles face each other.

[0252] In the optical axis direction, the length of the lower magnet portion 1510 of the repulsive magnet 1500 may be shorter than the length of the lower magnet portion 1311 of the drive magnet 1310. The length of the lower magnet portion 1510 of the repulsive magnet 1500 may be 60 to 72% of the length of the lower magnet portion 1311 of the drive magnet 1310. The length of the lower magnet portion 1510 of the repulsive magnet 1500 may be 55 to 77% of the length of the lower magnet portion 1311 of the drive magnet 1310.

[0253] In the optical axis direction, the length of the upper magnet portion 1520 of the repulsive magnet 1500 may be shorter than the length of the upper magnet portion 1312 of the drive magnet 1310. The length of the upper magnet portion 1520 of the repulsive magnet 1500 may be 60 to 72% of the length of the upper magnet portion 1312 of the drive magnet 1310. The length of the upper magnet portion 1520 of the repulsive magnet 1500 may be 55 to 77% of the length of the upper magnet portion 1312 of the drive magnet 1310.

[0254] In the optical axis direction, the length of the neutral portion 1530 of the repulsive magnet 1500 may be longer than the length of the neutral portion 1313 of the drive magnet 1310 (see (a) of FIG. 47). With this structure, when the drive magnet 1310 moves up and down, an area where attractive force acts between the drive magnet 1310 and the repulsive magnet 1500 may not be generated over the entire range. In the optical axis direction, the length of the repulsive magnet 1500 may be longer than the length of the drive magnet 1310. In the optical axis direction, the length of the lower magnet portion 1510 of the repulsive magnet 1500 may be shorter than the length of the lower magnet portion 1311 of the drive magnet 1310. In the optical axis direction, the length of the upper magnet portion 1520 of the repulsive magnet 1500 may be shorter than the length of the upper magnet portion 1312 of the drive magnet 1310.

[0255] The length of the neutral portion 1313 of the drive magnet 1310 in the optical axis direction may be 20 to 30% of the length of the neutral portion 1530 of the repulsive magnet 1500. The length of the neutral portion 1313 of the drive magnet 1310 in the optical axis direction may be 15 to 35% of the length of the neutral portion 1530 of the repulsive magnet 1500.

[0256] When the drive magnet 1310 moves to the downward position in the optical axis direction to the maximum extent, the first boundary between the lower magnet portion 1311 of the drive magnet 1310 and the neutral portion 1313 of the drive magnet 1310 can be positioned at the same height as the 3 / 4 point from the top of the neutral portion 1530 of the repulsive magnet 1500, i.e., the 75% point (c in (c) of Figure 47) (see (c) of Figure 47).

[0257] As a variant, when the drive magnet 1310 moves maximally downward in the optical axis direction, the first boundary between the lower magnet portion 1311 of the drive magnet 1310 and the neutral portion 1313 of the drive magnet 1310 may be positioned at the same height as the first boundary between the lower magnet portion 1510 of the repulsive magnet 1500 and the neutral portion 1530 of the repulsive magnet 1500.

[0258] As another variation, when the drive magnet 1310 moves to the downward position in the optical axis direction to its maximum extent, the first boundary between the lower magnet portion 1311 of the drive magnet 1310 and the neutral portion 1313 of the drive magnet 1310 may be positioned at a height lower than the first boundary between the lower magnet portion 1510 of the repulsive magnet 1500 and the neutral portion 1530 of the repulsive magnet 1500.

[0259] As another variation, when the drive magnet 1310 moves to the downward position in the optical axis direction to its maximum extent, the first boundary between the lower magnet portion 1311 of the drive magnet 1310 and the neutral portion 1313 of the drive magnet 1310 may be positioned at a height higher than the first boundary between the lower magnet portion 1510 of the repulsive magnet 1500 and the neutral portion 1530 of the repulsive magnet 1500.

[0260] When the drive magnet 1310 moves to the upper side in the optical axis direction to the maximum extent, the second boundary between the upper magnet portion 1312 of the drive magnet 1310 and the neutral portion 1313 of the drive magnet 1310 can be positioned at the same height as the 1 / 4 point from the top of the neutral portion 1530 of the repulsive magnet 1500, i.e., the 25% point (b in Figure 47(b)) (see (b) in Figure 47).

[0261] As a variant, when the drive magnet 1310 moves to the upper side in the optical axis direction to the maximum extent, the second boundary between the upper magnet portion 1312 of the drive magnet 1310 and the neutral portion 1313 of the drive magnet 1310 may be positioned at the same height as the second boundary between the upper magnet portion 1520 of the repulsive magnet 1500 and the neutral portion 1530 of the repulsive magnet 1500.

[0262] In another variation, when the drive magnet 1310 moves to the upper side in the optical axis direction to the maximum extent, the second boundary between the upper magnet portion 1312 of the drive magnet 1310 and the neutral portion 1313 of the drive magnet 1310 may be positioned at a height higher than the second boundary between the upper magnet portion 1520 of the repulsive magnet 1500 and the neutral portion 1530 of the repulsive magnet 1500.

[0263] As another variation, when the drive magnet 1310 moves to the upper side in the optical axis direction to the maximum extent, the second boundary between the upper magnet portion 1312 of the drive magnet 1310 and the neutral portion 1313 of the drive magnet 1310 may be positioned at a height lower than the second boundary between the upper magnet portion 1520 of the repulsive magnet 1500 and the neutral portion 1530 of the repulsive magnet 1500.

[0264] In the second embodiment of the present invention, through the above-mentioned structure, even when the driving magnet 1310 moves, it is possible to prevent the opposite polarities of the driving magnet 1310 and the repulsive magnet 1500 from being arranged to face each other.

[0265]

[0266] Second Embodiment Hereinafter, autofocus (AF) driving of a lens driving device according to a second embodiment of the present invention will be described with reference to the drawings.

[0267] 49 to 51 are diagrams illustrating autofocus driving of a lens driving device according to a second embodiment of the present invention. Fig. 49 is a cross-sectional view showing the state of the moving part in the initial state when no current is applied to the coil. Fig. 50 is a cross-sectional view showing the state when a forward current is applied to the coil and the moving part has moved upward in the optical axis direction. Fig. 51 is a cross-sectional view showing the state when a reverse current is applied to the coil and the moving part has moved downward in the optical axis direction.

[0268] As shown in FIG. 49, the moving part 1200 can be disposed at a position separated from both the upper plate 1131 of the cover 1130 and the base 1110 in the initial position where no current is applied to the coil 1320 .

[0269] When a forward current is applied to the coil 1320, electromagnetic interaction between the coil 1320 and the drive magnet 1310 causes the drive magnet 1310 to move upward in the optical axis direction (see A in FIG. 50). At this time, the holder 1210 can move upward in the optical axis direction together with the drive magnet 1310. Furthermore, the lens can move upward in the optical axis direction together with the holder 1210. This changes the distance between the lens and the image sensor, and the focus of the image formed on the image sensor through the lens can be adjusted.

[0270] When a reverse current is applied to the coil 1320, electromagnetic interaction between the coil 1320 and the drive magnet 1310 causes the drive magnet 1310 to move downward in the optical axis direction (see B in FIG. 51). At this time, the holder 1210 can move downward in the optical axis direction together with the drive magnet 1310. Furthermore, the lens can move downward in the optical axis direction together with the holder 1210. This changes the distance between the lens and the image sensor, and the focus of the image formed on the image sensor through the lens can be adjusted.

[0271] Meanwhile, during the movement of the drive magnet 1310, the sensor 1330 can sense the movement amount and position of the lens in the optical axis direction by sensing the strength of the magnetic field of the drive magnet 1310. The movement amount and position of the lens in the optical axis direction sensed by the sensor 1330 can be used for autofocus feedback control.

[0272]

[0273] A camera device according to a second embodiment of the present invention will be described below with reference to the drawings.

[0274] FIG. 52 is an exploded perspective view of a camera device according to a second embodiment of the present invention.

[0275] The camera device 1010A may include a camera module.

[0276] The camera device 1010A may include a lens module 1020. The lens module 1020 may include at least one lens. The lens may be disposed at a position corresponding to the image sensor 1060. The lens module 1020 may include a lens and a barrel. The lens module 1020 may be coupled to a holder 1210 of the lens driving device 1010. The lens module 1020 may be coupled to the holder 1210 by threading and / or adhesive. The lens module 1020 may move integrally with the holder 1210.

[0277] The camera device 1010A may include a filter 1030. The filter 1030 may serve to block light of a specific frequency band from passing through the lens module 1020 and entering the image sensor 1060. The filter 1030 may be arranged parallel to the xy plane. The filter 1030 may be arranged between the lens module 1020 and the image sensor 1060. The filter 1030 may be arranged on the sensor base 1040. Alternatively, the filter 1030 may be arranged on the base 1110. The filter 1030 may include an infrared filter. The infrared filter may block light in the infrared region from entering the image sensor 1060.

[0278] The camera device 1010A may include a sensor base 1040. The sensor base 1040 may be disposed between the lens driver 1010 and the printed circuit board 1050. The sensor base 1040 may include a protrusion 1041 on which the filter 1030 is disposed. An opening may be formed in the portion of the sensor base 1040 on which the filter 1030 is disposed so that light passing through the filter 1030 can enter the image sensor 1060. An adhesive member may bond or adhere the base 1110 of the lens driver 1010 to the sensor base 1040. The adhesive member may additionally serve to prevent foreign matter from entering the interior of the lens driver 1010. The adhesive member may include one or more of epoxy, a heat-curable adhesive, and an ultraviolet-curable adhesive.

[0279] In a modified example, the sensor base 1040 may be omitted. In this case, the filter 1030 may be coupled to the base 1110 of the lens driving device 1010. The filter 1030 may be coupled to the underside of the base 1110 of the lens driving device 1010. Also, in a modified example, the sensor holder 1040 may be formed to protect only the image sensor 1060. That is, the base 1110 of the lens driving device 1010 may be directly disposed on the printed circuit board 1050. In this case, the sensor holder 1040 may be disposed within the base 1110. The base 1110 may be formed to surround the sensor holder 1040. The base 1110 may include legs that are outer walls that are placed on the printed circuit board 1050.

[0280] The camera device 1010A may include a printed circuit board (PCB) 1050. The printed circuit board 1050 may be a substrate or a circuit board. The lens driving device 1010 may be disposed on the printed circuit board 1050. A sensor base 1040 may be disposed between the printed circuit board 1050 and the lens driving device 1010. The printed circuit board 1050 may be electrically connected to the lens driving device 1010. The image sensor 1060 may be disposed on the printed circuit board 1050. The printed circuit board 1050 may include various circuits, elements, a control unit, etc. for converting an image formed on the image sensor 1060 into an electrical signal and transmitting the signal to an external device.

[0281] The camera device 1010A may include an image sensor 1060. The image sensor 1060 may be configured to form an image by receiving light that has passed through the lens and the filter 1030. The image sensor 1060 may be mounted on a printed circuit board 1050. The image sensor 1060 may be electrically connected to the printed circuit board 1050. For example, the image sensor 1060 may be bonded to the printed circuit board 1050 using surface mounting technology (SMT). For another example, the image sensor 1060 may be bonded to the printed circuit board 1050 using flip chip technology. The image sensor 1060 may be disposed such that its optical axis coincides with that of a lens. That is, the optical axis of the image sensor 1060 may be aligned with that of the lens. The image sensor 1060 may convert light irradiated onto an effective image area of ​​the image sensor 1060 into an electrical signal. The image sensor 1060 may be any one of a CCD (charge coupled device), a MOS (metal oxide semi-conductor), a CPD, and a CID.

[0282] The camera device 1010A may include a motion sensor 1070. The motion sensor 1070 may be mounted on the printed circuit board 1050. The motion sensor 1070 may be electrically connected to the control unit 1080 via a circuit pattern provided on the printed circuit board 1050. The motion sensor 1070 may output rotational angular velocity information according to the movement of the camera device 1010A. The motion sensor 1070 may include a two-axis or three-axis gyro sensor or an angular velocity sensor.

[0283] The camera device 1010A may include a control unit 1080. The control unit 1080 may be disposed on the printed circuit board 1050. The control unit 1080 may be electrically connected to the coils 1320 of the lens driving device 1010. The control unit 1080 may individually control the direction, strength, amplitude, etc. of the current supplied to the coils 1320. The control unit 1080 may control the lens driving device 1010 to perform an autofocus function and / or an image stabilization function. Furthermore, the control unit 1080 may perform autofocus feedback control and / or image stabilization feedback control for the lens driving device 1010.

[0284] The camera device 1010A may include a connector 1090. The connector 1090 may be electrically connected to the printed circuit board 1050. The connector 1090 may include a port for electrically connecting to an external device.

[0285]

[0286] An optical apparatus according to a second embodiment of the present invention will be described below with reference to the drawings.

[0287] Fig. 53 is a perspective view of an optical apparatus according to a second embodiment of the present invention, and Fig. 54 is a perspective view of an optical apparatus according to a modified example.

[0288] The optical device 1001 may include one or more of a mobile phone, a portable terminal, a mobile terminal, a smartphone, a smart pad, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistant), a PMP (Portable Multimedia Player), and a navigation system. The optical device 1001 may include any device for taking images or photographs.

[0289] The optical device 1001 may include a main body 1020. The optical device 1001 may include a camera device 1010A. The camera device 1010A may be disposed on the main body 1020. The camera device 1010A may photograph an object. The optical device 1001 may include a display. The display may be disposed on the main body 1020. The display may output one or more of a video and an image photographed by the camera device 1010A. The display may be disposed on a first surface of the main body 1020. The camera device 1010A may be disposed on one or more of the first surface and a second surface opposite the first surface of the main body 1020. As shown in FIG. 53, the camera device 1010A may have a triple camera disposed vertically. As shown in FIG. 54, the camera device 1010A-1 may have a triple camera disposed horizontally.

[0290]

[0291] Although the first and second embodiments of the present invention have been described separately above, some of the components of the first embodiment may be replaced with corresponding components of the second embodiment. Also, some of the components of the second embodiment may be replaced with corresponding components of the first embodiment. Furthermore, a third embodiment of the present invention may include some of the components of the first embodiment and some of the components of the second embodiment. The first embodiment of the present invention may include the repulsive magnet 1500 of the second embodiment. Also, the second embodiment of the present invention may include the repulsive magnet 500 of the first embodiment.

[0292]

[0293] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art will understand that the present invention can be embodied in other specific forms without changing the technical spirit or essential characteristics thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and are not limiting.

Claims

1. A fixed portion; a moving part disposed within the fixed part; a coil disposed on the fixed portion; a first magnet disposed in the moving part and interacting with the coil; a second magnet disposed on the fixed portion; a ball disposed between the fixed portion and the moving portion, The second magnet presses the first magnet so that the ball is pressed between the fixed portion and the moving portion.

2. The lens driving device according to claim 1 , wherein the first magnet moves in the optical axis direction when a current is applied to the coil.

3. the coil overlaps with the first magnet in a first axis direction perpendicular to the optical axis direction; The lens driving device according to claim 1 , wherein the second magnet overlaps with the first magnet in the first axial direction.

4. The lens driving device according to claim 3 , wherein the second magnet includes a first portion that overlaps with the first magnet in the first axial direction and a second portion that does not overlap with the first magnet in the first axial direction.

5. The lens driving device according to claim 3 , wherein the second magnet overlaps with the coil in a second axis direction perpendicular to the optical axis direction and the first axis direction.

6. The lens driving device of claim 1 , wherein the second magnet includes a first unit magnet disposed on one side of the coil and a second unit magnet disposed on the other side of the coil.

7. The lens driving device according to claim 1 , wherein the second magnet is disposed so as to generate a repulsive force between the second magnet and the first magnet.

8. 2. The lens driving device of claim 1, wherein the first magnet includes a first magnet portion including an N pole and an S pole, a second magnet portion including an S pole and an N pole, and a neutral portion disposed between the first magnet portion and the second magnet portion.

9. the second magnet includes a first magnet portion including an N pole and an S pole, a second magnet portion including an S pole and an N pole, and a neutral portion disposed between the first magnet portion of the second magnet and the second magnet portion of the second magnet, the N pole of the first magnet portion of the second magnet faces the N pole of the first magnet portion of the first magnet, The lens driving device according to claim 8 , wherein the south pole of the second magnet portion of the second magnet faces the south pole of the second magnet portion of the first magnet.

10. A fixed portion; a moving part disposed within the fixed part; a coil disposed on the fixed portion; a magnet disposed in the moving part and interacting with the coil; a ball disposed between the fixed portion and the moving portion, the fixing portion includes a first side wall on which the coil is disposed, a second side wall disposed on the opposite side of the first side wall, and a protrusion disposed between the first side wall and the second side wall in a first direction in which the first side wall faces the second side wall, In the first direction, the moving portion includes a protruding portion disposed between the first side wall of the fixed portion and the protruding portion, The lens driving device, wherein the ball is disposed between the protrusion of the moving part and the protrusion of the fixed part.

Images