Lens driving device, camera device, and optical device

Abstract

Disclosed in an embodiment of the present invention is a lens driving device comprising: a fixed portion; a moving portion which is arranged in the fixed portion and is movable in the optical axis direction; a driving portion including a coil and a first magnet which face each other in a first direction perpendicular to the optical axis direction and move the moving portion; a ball arranged between the moving portion and the fixed portion; and a second magnet which is arranged apart from the first magnet in the first direction and exerts a repulsive force on the first magnet, wherein the center of the second magnet is eccentrically arranged with respect to the center of the first magnet in a second direction perpendicular to the optical axis direction and the first direction, and the coil is arranged between the first magnet and the second magnet.

Description

Lens driving devices, camera devices and optical instruments

[0001] Embodiments of the present invention relate to a lens driving device, a camera device, and an optical device.

[0002] A camera device is a device that takes pictures or videos of a subject, and is installed in optical devices such as smartphones, drones, and vehicles.

[0003] Camera devices incorporate an autofocus function that automatically adjusts focus based on the distance from the subject. This autofocus function is achieved by moving the lens along the optical axis relative to the image sensor. This movement of the lens along the optical axis can be guided by a ball. The attractive force between a magnet and a yoke can be used to hold the ball between the fixed and moving parts.

[0004] However, in this case, the moment generated by the ball may cause the lens to roll or the axis may become difficult to manage.

[0005] The technical problem to be solved by the embodiment of the present invention is to provide a lens driving device in which the moment generated by the ball is minimized as the ball is placed close to the optical axis.

[0006] In addition, an embodiment of the present invention can provide a lens driving device in which rolling, or rotation, of the lens is minimized.

[0007] In addition, the embodiment of the present invention can provide a lens driving device that is easy to manage the axis for the maintenance force through eccentricity.

[0008] In addition, a lens driving device can be provided that can place the ball at various locations, such as the center of gravity of the moving part or the opposite side of the driving magnet, depending on the needs of the present invention.

[0009] The problem to be solved in the embodiment is not limited to this, and it can be said that the purpose or effect that can be understood from the solution or implementation form of the problem described below is also included.

[0010] A lens driving device according to an embodiment of the present invention comprises: a fixed part; a moving part disposed within the fixed part and movable in the direction of an optical axis; a driving part including a coil and a first magnet facing each other in a first direction perpendicular to the direction of the optical axis and moving the moving part; a ball disposed between the moving part and the fixed part; and a second magnet disposed spaced apart from the first magnet in the first direction and exerting a repulsive force; wherein a center of the second magnet is disposed eccentrically with respect to a center of the first magnet in a second direction perpendicular to the direction of the optical axis and the first direction, and the coil is disposed between the first magnet and the second magnet.

[0011] The second direction bisector of the second magnet may be arranged to be offset from the second direction bisector of the first magnet.

[0012] The above moving part includes a bobbin, and the second direction bisector of the bobbin can be arranged to be misaligned with the second direction bisector of the second magnet.

[0013] The bisector of the second direction of the above coil may be arranged to be offset from the bisector of the second magnet in the second direction.

[0014] The above-mentioned fixed part includes a base, and can be arranged so as to be offset from a second direction bisector of the base and a second direction bisector of the second magnet.

[0015] The above ball includes a first ball and a second ball that are spaced apart, and a bisector of an imaginary line connecting the first ball and the second ball in the second direction can be arranged to be offset from a bisector of the second magnet in the second direction.

[0016] The sizes of the first ball and the second ball may be different.

[0017] The first ball is positioned adjacent to the second magnet relative to the second ball, and the first ball may be larger than the second ball.

[0018] The bisector of the second direction of the above coil may correspond to the bisector of the second direction of the above first magnet.

[0019] The bisector of the second direction of the above coil may correspond to the bisector of the second magnet in the second direction.

[0020] The second magnet may cause the ball to be pressed between the fixed part and the moving part.

[0021] The fixed part may include a base and a cover disposed on the base, and the moving part may include a bobbin disposed on the base.

[0022] A substrate connected to the base and the coil; wherein the substrate can be disposed between the coil and the second magnet.

[0023] The above coil may be placed on the base, and the first magnet may be placed on the bobbin.

[0024] The second magnet may be placed on the base, and the coil may be placed between the first magnet and the second magnet.

[0025] The length of the second magnet in the optical axis direction may be greater than the length of the first magnet in the optical axis direction.

[0026] The upper surface of the second magnet may be positioned higher than the upper surface of the first magnet, and the lower surface of the second magnet may be positioned lower than the lower surface of the first magnet.

[0027] The second magnet and the first magnet may overlap at least partially in the first direction.

[0028] A sensor disposed on the inside of the coil or on the outside of the coil; wherein the sensor may be disposed to be misaligned with the second magnet in the first direction.

[0029] A lens driving device according to an embodiment includes a housing; a bobbin disposed within the housing and movable in the direction of an optical axis; a first magnet disposed on the bobbin; a coil disposed in the housing and facing the first magnet in a first direction perpendicular to the direction of the optical axis; a first ball and a second ball disposed between the housing and the bobbin and spaced apart from each other in a second direction perpendicular to the direction of the optical axis and the first direction; and a second magnet disposed spaced apart from the coil in the first direction, wherein a distance between a center of the second magnet and the first ball is different from a distance between a center of the second magnet and the second ball.

[0030] A lens driving device according to an embodiment comprises: a housing; a bobbin disposed within the housing and movable in the direction of an optical axis; a first magnet disposed on the bobbin; a coil disposed in the housing and facing the first magnet; a ball disposed between the housing and the bobbin; and a second magnet disposed spaced apart from the coil, wherein the coil is disposed between the first magnet and the second magnet, the ball is pressed by a repulsive force between the first magnet and the second magnet, and a central axis of the bobbin is eccentric with respect to a center of the second magnet.

[0031] According to an embodiment of the present invention, a lens driving device is implemented in which moment generation by a ball is minimized as the ball is positioned close to the optical axis.

[0032] In addition, an embodiment of the present invention can implement a lens driving device in which rolling, or rotation, of the lens is minimized.

[0033] In addition, the embodiment of the present invention can implement a lens driving device that is easy to manage the axis for the maintenance force through eccentricity.

[0034] In addition, a lens driving device can be implemented that can place the ball at various locations, such as the center of gravity of the moving part or the opposite side of the driving magnet, depending on the needs of the present invention.

[0035] The various advantageous and beneficial effects of the present invention are not limited to the above-described contents, and will be more easily understood in the course of explaining specific embodiments of the present invention.

[0036] FIG. 1 is a perspective view of a lens driving device according to one embodiment of the present invention.

[0037] Figure 2 is a cross-sectional view taken along line AA of Figure 1.

[0038] Figure 3 is a cross-sectional view taken along line BB of Figure 1.

[0039] Figures 4 to 6 are cross-sectional perspective views of a lens driving device according to one embodiment of the present invention, cut at different parts and viewed from different angles.

[0040] FIG. 7 is a cross-sectional view taken from above and cut perpendicular to the optical axis of a lens driving device according to one embodiment of the present invention.

[0041] Figure 8 is an exploded perspective view of a lens driving device according to one embodiment of the present invention.

[0042] Fig. 9 is an exploded perspective view viewed from a different direction than Fig. 8.

[0043] Fig. 10 is a perspective view of a lens driving device according to one embodiment of the present invention with the cover omitted.

[0044] Fig. 11 is a perspective view of Fig. 10 with the moving part and related components omitted.

[0045] Figure 12 is a perspective view of Figure 11 viewed from a different direction.

[0046] Fig. 13 is a perspective view of Fig. 12 with the ball, substrate, and repulsive magnet omitted.

[0047] Fig. 14 is a perspective view showing a moving part and related configuration of a lens driving device according to one embodiment of the present invention.

[0048] Figure 15 is a perspective view of Figure 14 viewed from a different direction.

[0049] FIG. 16a is a front view illustrating a moving part, a driving part, and a repulsive magnet of a lens driving device according to one embodiment of the present invention.

[0050] Figure 16b is a modified example of Figure 16a,

[0051] Fig. 17 is a cross-sectional perspective view showing a driving magnet, a repulsive magnet, and related configuration of a lens driving device according to one embodiment of the present invention.

[0052] Fig. 18 is a perspective view of a driving magnet and a repulsive magnet of a lens driving device according to one embodiment of the present invention.

[0053] FIG. 19 is a drawing illustrating a driving magnet and a repulsive magnet of a lens driving device according to an embodiment of the present invention. (a) is a drawing illustrating the driving magnet and the repulsive magnet before the driving magnet moves, i.e., in the initial state. (b) is a drawing illustrating the driving magnet and the repulsive magnet when the driving magnet is moved to the maximum upward direction in the optical axis direction. (c) is a drawing illustrating the driving magnet and the repulsive magnet when the driving magnet is moved to the maximum downward direction in the optical axis direction.

[0054] Fig. 20 is a cross-sectional view for comparing the distance between the optical axis and each component in a lens driving device according to one embodiment of the present invention.

[0055] Figures 21 to 23 are diagrams for explaining the autofocus driving of a lens driving device according to one embodiment of the present invention. Figure 21 is a cross-sectional view showing the appearance of the moving part in the initial state where no current is applied to the coil. Figure 22 is a cross-sectional view showing the appearance of the moving part moving upward in the direction of the optical axis when forward current is applied to the coil. Figure 23 is a cross-sectional view showing the appearance of the moving part moving downward in the direction of the optical axis when reverse current is applied to the coil.

[0056] Fig. 24 is a perspective view of a lens driving device according to another embodiment of the present invention.

[0057] Fig. 25 is a perspective view of a lens driving device according to another embodiment of the present invention with the cover omitted.

[0058] FIG. 26 is a cross-sectional view taken from above and cut perpendicular to the optical axis of a lens driving device according to another embodiment of the present invention.

[0059] Fig. 27 is a perspective view of a lens driving device according to another embodiment of the present invention.

[0060] Fig. 28 is a cross-sectional perspective view of a lens driving device according to another embodiment of the present invention, cut away from a portion.

[0061] FIG. 29 is a cross-sectional view taken from above and cut perpendicular to the optical axis of a lens driving device according to another embodiment of the present invention.

[0062] Figure 30 is an exploded perspective view of a camera device according to one embodiment of the present invention.

[0063] Figure 31 is a perspective view of an optical device according to one embodiment of the present invention.

[0064] Figure 32 is a perspective view of an optical device according to a modified example.

[0065] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0066] Terms that include ordinal numbers, such as "second," "first," etc., may be used to describe various components, but the components are not limited by the terms. The terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, a second component may be referred to as "first component," and similarly, a first component may also be referred to as "second component." The term "and / or" includes a combination of multiple related items described herein or any of multiple related items described herein.

[0067] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0068] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprise" or "have" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0069] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0070] Hereinafter, embodiments will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or corresponding components are given the same reference numbers, and redundant descriptions thereof will be omitted.

[0071] The 'optical axis (see OA in Fig. 21) direction' used below is defined as the optical axis direction of the lens and / or image sensor coupled to the lens driving device.

[0072] The 'vertical direction' used below may be a direction parallel to or the same direction 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'. For convenience, the X-axis direction is referred to as the first direction. The Y-axis direction is referred to as the second direction. The Z-axis direction is referred to as the Z-axis direction.

[0073] The 'auto focus (AF) function' used below is defined as a function that automatically focuses on a subject by adjusting the distance from the image sensor by moving the lens in the direction of 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. In addition, 'closed-loop auto focus (CLAF) control' is defined as a function that detects the distance between the image sensor and the lens and provides feedback control of the position of the lens in real time to improve the accuracy of focus adjustment.

[0074] Hereinafter, one of the “X-axis” and the “Y-axis” may be referred to as the “first axis” and the other as the “second axis.”

[0075] Hereinafter, one of the “driving magnet (310)” and the “repulsive magnet (500)” may be referred to as the “first magnet” and the other may be referred to as the “second magnet”.

[0076] Hereinafter, one of the “lower magnet part (311)” and the “upper magnet part (312)” may be referred to as the “first magnet part” and the other may be referred to as the “second magnet part”.

[0077] Hereinafter, one of the “lower magnet part (510)” and the “upper magnet part (520)” may be referred to as the “first magnet part” and the other may be referred to as the “second magnet part”.

[0078] Hereinafter, the configuration of a lens driving device according to one embodiment of the present invention will be described with reference to the drawings.

[0079] FIG. 1 is a perspective view of a lens driving device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA of FIG. 1. FIG. 3 is a cross-sectional view taken along line BB of FIG. 1. FIGS. 4 to 6 are cross-sectional perspective views cut at different parts and viewed from above of the lens driving device according to an embodiment of the present invention. FIG. 7 is a cross-sectional view cut perpendicular to the optical axis and viewed from above of the lens driving device according to an embodiment of the present invention. FIG. 8 is an exploded perspective view of the lens driving device according to an embodiment of the present invention. FIG. 9 is an exploded perspective view viewed from a different direction from FIG. 8. FIG. 10 is a perspective view of the lens driving device according to an embodiment of the present invention with a cover omitted. FIG. 11 is a perspective view of FIG. 10 with the moving part and related components omitted. FIG. 12 is a perspective view of FIG. 11 viewed from a different direction. FIG. 13 is a perspective view of FIG. 12 with the ball, the substrate, and the repulsive magnet omitted. Fig. 14 is a perspective view showing a moving part and related components of a lens driving device according to an embodiment of the present invention. Fig. 15 is a perspective view of Fig. 14 viewed from another direction. Fig. 16a is a front view showing a moving part, a driving part, and a repulsive magnet of a lens driving device according to an embodiment of the present invention. Fig. 16b is a modified example of Fig. 16a. Fig. 17 is a cross-sectional perspective view showing a driving magnet and a repulsive magnet and related components of a lens driving device according to an embodiment of the present invention. Fig. 18 is a perspective view of a driving magnet and a repulsive magnet of a lens driving device according to an embodiment of the present invention. Fig. 19 is a drawing showing a driving magnet and a repulsive magnet of a lens driving device according to an embodiment of the present invention. (a) is a drawing showing the driving magnet and the repulsive magnet before the driving magnet moves, i.e., in an initial state. (b) is a drawing showing the driving magnet and the repulsive magnet when the driving magnet is moved to the maximum upward direction in the optical axis direction. (c) is a drawing showing the driving magnet and the repulsive magnet when the driving magnet is moved to the maximum downward direction in the optical axis direction.Fig. 20 is a cross-sectional view for comparing the distance between the optical axis and each component in a lens driving device according to one embodiment of the present invention.

[0080] Referring to FIGS. 1 to 20, 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.

[0081] In addition, the lens driving device (10) according to the embodiment may include a fixed part (100), a moving part (200), a driving part (300), a ball (400), and a repulsive magnet (500).

[0082] Specifically, the lens driving device (10) may include a fixed part (100). The fixed part (100) may be a part that is relatively fixed when the moving part (200) moves. The moving part (200) may move with respect to the fixed part (100).

[0083] The lens driving device (10) may include a base (110). The fixing member (100) may include the base (110). In addition, 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 the base (110). The holder (210) may be disposed on the lower plate (111) of the base (110). The holder (210) may be disposed within the base (110). For example, the holder (210) may be accommodated within a hole or groove within the base (110). The holder (210) may be disposed within a side plate (112) of the base (110).

[0084] 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 part (200). The lower plate (111) of the base (110) may support a lower surface of the holder (210). When the moving part (200) moves, the lower plate (111) of the base (110) and the moving part (200) may be spaced apart from each other. Accordingly, the lower plate (111) of the base (110) may function as a lower stopper of the moving part (200). The lower plate (111) of the base (110) may function as a lower stopper of the holder (210).

[0085] The base (110) may include a side plate (112). The side plate (112) may be a 'side'. The side plate (112) may be a 'side wall'. The side plate (112) of the base (110) may extend from the upper surface of the lower plate (111). The side plate (112) may include a plurality of side plates. The side plate (112) may include four side plates. The side plate (112) may include a first side plate to a fourth side plate. The side plate (112) may include a first side plate and a second side plate that are arranged opposite each other, and a third side plate and a fourth side plate that are arranged opposite each other.

[0086] The base (110) may include a pillar portion (113). The pillar portion (113) may extend from the upper surface of the lower plate (111). The pillar portion (113) may extend inward from the side plate (112). A ball (400) may be arranged in the pillar portion (113). A groove (114) in which the ball (400) is arranged may be formed in the pillar portion (113). The pillar portion (113) may be referred to as a 'protrusion'.

[0087] The fixed part (100) may include a first side wall on which the coil (320) 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. In this case, the protrusion may be a pillar part (113). In the first direction, the moving part (200) may include a protrusion arranged between the first side wall of the fixed part (100) and the protrusion. For example, the protrusion may be arranged to penetrate a portion of the moving part (200) (e.g., a holder). Alternatively, the moving part (200) described below may include a groove and the protrusion may be positioned within the groove. In addition, the ball (400) may be arranged between the protrusion of the moving part (200) and the protrusion of the fixed part (100). Accordingly, the moving part (200) can move along the optical axis direction with respect to the fixed part (100) through a ball (guide member) placed between the protrusion and the moving part.

[0088] The base (110) may include a groove (114). The column portion (113) may include a groove (114). The groove (114) may be formed in the column portion (113). The groove (114) may be a 'ball receiving groove'. A ball (400) may be placed in the groove (114). The groove (114) may be in direct contact with the ball (400). The ball (400) and the groove (114) may have various numbers of contact points. For example, the ball (400) may be in two-point or three-point contact with the groove (114). And the groove (114) may extend or be arranged in the direction of the optical axis. The groove (114) may include a plurality of grooves. For example, the groove (114) may include two grooves. And the two grooves may be arranged parallel to each other.

[0089] The base (110) may include a groove (115). The groove (115) may be a 'substrate and repulsive magnet receiving groove'. A substrate (120) may be placed in the groove (115). A repulsive magnet (500) may be placed in the groove (115). The groove (115) may include a shape corresponding to the substrate (120). The groove (115) may be formed on the outer surface of the side plate (112) of the base (110). The depth of the groove (115) may be greater than the thickness of the repulsive magnet (500).

[0090] The base (110) may include a step (116). The step (116) may be formed at the lower end of the 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 placed on the step (116) of the base (110).

[0091] 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 of 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 a plurality of protrusions. The protrusion (117) may include two protrusions.

[0092] According to an embodiment, the bonding or assembly between the substrate (120) and the base (110) can be easily achieved. Conversely, the base (110) may have a groove and the substrate (120) may have a protrusion.

[0093] One of the “home (114)” and “home (115)” of the base (110) may be called the “first home” and the other may be called the “second home”.

[0094] The lens driving device (10) may include a substrate (120). The fixing member (100) may include the substrate (120). The substrate (120) may be placed on the fixing member (100). The substrate (120) may be placed on the base (110). The substrate (120) may be connected to the base (110). The substrate (120) may be placed on the side plate (112) of the base (110). The substrate (120) may be placed on the outer surface of the side plate (112) of the base (110). The substrate (120) may be placed on the cover (130). The substrate (120) may be placed on the side plate (132) of the cover (130). The substrate (120) may be placed 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. A coil (320) and a sensor (330) may be disposed on the substrate (120). The substrate (120) may be electrically connected to the coil (320). The substrate (120) may be electrically connected to the sensor (330). In addition, the substrate (120) may be disposed spaced apart from the driving magnet (23100). In addition, a repulsive magnet (500) 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).

[0095] The substrate (120) may be disposed between the coil (320) and the repulsive magnet (500). The substrate (120) may include a terminal (121). The terminal (121) may be formed at a lower end of an outer surface of the substrate (120). The terminal (121) of the substrate (120) may be coupled to a printed circuit board (50) of a camera device (10A). The terminal (121) of the substrate (120) may be electrically connected to the printed circuit board (50) of the camera device (10A). The terminal (121) of the substrate (120) may be coupled to the printed circuit board (50) of the camera device (10A) by solder. The terminal (121) may include a plurality of terminals. The terminal (121) may include five terminals. The terminal (121) may include a terminal electrically connected to a sensor (330). The terminal (121) may include a ground terminal for grounding. The terminal (121) may include a terminal electrically connected to the coil (320). At least a portion of the terminal (121) may be exposed to the outside.

[0096] The lens driving device (10) may include a cover (130). The fixing member (100) may include the cover (130). The cover (130) may be placed on the base (110). The cover (130) may be placed 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 accommodate the holder (210) therein. The cover (130) may be a shield member. The cover (130) may be a shield can. In addition, the cover may be a housing.

[0097] The cover (130) may include a top plate (131). The top plate (131) of the cover (130) may function as an upper stopper of the moving part (200). The top plate (131) of the cover (130) may function as an upper stopper of the holder (210). The top plate (131) may be placed on the moving part (200). The upward movement of the moving part (200) may be restricted by the moving part (200) coming into contact with the top plate (131). The top plate (131) may include a hole through which light passes.

[0098] The cover (130) may include a side plate (132). The side plate (132) may extend from the top plate (131). The side plate (132) may be disposed on the base (110). The side plate (132) may be disposed on a step (116) that protrudes from the lower portion of the outer surface of the base (110). The side plate (132) may include a plurality of side plates. The side plate (132) may include four side plates. The side plate (132) may include a first side plate and a second side plate that are disposed opposite each other, and a third side plate and a fourth side plate that are disposed opposite each other.

[0099] 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 (Z-axis direction) with respect to the fixed unit (100) by the driving unit (300). The moving unit (200) may be disposed within the fixed unit (100) so as to be movable in the optical axis direction. The moving unit (200) may be moved in the optical axis direction. The moving unit (200) may be moved during AF driving. A lens can be attached to the moving part (200).

[0100] The lens driving device (10) may include a holder (210). The moving unit (200) may include the holder (210). The holder (210) may be an 'AF holder'. The holder (210) may be a 'bobbin'. The holder (210) may be a 'carrier'. In addition, the holder (210) may be a 'lens assembly'. The holder (210) may be placed within the base (110). The holder (210) may be placed on the base (110). The holder (210) may be placed within the cover (130). The holder (210) may be placed so as to be movable. The holder (210) may be placed so as to be movable in the optical axis direction.

[0101] The holder (210) may include a first portion (211). The first portion (211) may be positioned between the side plate (112) and the pillar portion (113) of the base (110). A ball (400) may be positioned in the first portion (211) of the holder (210). A groove (212) in which the ball (400) is positioned may be formed in the first portion (211) of the holder (210).

[0102] The holder (210) may include a groove (212). The groove (212) may be a 'ball receiving groove'. A ball (400) may be placed in the groove (212). The groove (212) may be in direct contact with the ball (400). The groove (212) may be placed in the direction of the optical axis. The groove (212) may guide the ball (400) to move in the direction of the optical axis. The groove (212) may include a plurality of grooves. The groove (212) may include two grooves. The two grooves may be placed parallel to each other. The groove (212) of the holder (210) may be placed to face the groove (114) of the base (110). The ball (400) may be placed between the groove (212) of the holder (210) and the groove (114) of the base (110).

[0103] The holder (210) may include a groove (213). The groove (213) may be a 'driving magnet receiving groove'. The groove (213) may be formed on the outer surface of the holder (210). The groove (213) may be formed concavely on the side surface of the holder (210). A driving magnet (310) (or a first magnet) may be placed in the groove (213). The groove (213) may be formed in a shape corresponding to the driving magnet (310). The groove (213) may be recessed to a depth equal to the thickness of the driving magnet (310).

[0104] One of the “home (212)” and the “home (213)” of the holder (210) may be called the “first home” and the other may be called the “second home”.

[0105] The lens driving device (10) may include a driving unit (300). The driving unit (300) may move the moving unit (200) in the direction of the optical axis. The driving unit (300) may move the holder (210) in the direction of the optical axis. The driving unit (300) may move the holder (210) in the direction of the optical axis 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 direction of the optical axis. In addition, the coil (320) may face the first magnet or the driving magnet (310) in a first direction (X-axis direction) perpendicular to the optical axis direction. In addition, the coil (320) may generate an electromagnetic force with the facing driving magnet (310) to move the moving unit (200).

[0106] The lens driving device (10) may include a driving magnet (310). The driving unit (300) may include the driving magnet (310). For example, the driving magnet (310) may be placed on the moving unit (200). The driving magnet (310) may be placed on the holder (210). These positions may also be reversed.

[0107] In an embodiment, the driving magnet (310) may be placed 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 adhesively bonded to the holder (210). The driving magnet (310) may be placed inside the cover (130). The driving magnet (310) may be placed between the coil (320) and the holder (210). The driving magnet (310) may be placed inside the coil (320).

[0108] The driving magnet (310) may overlap the coil (320) in a direction perpendicular to the optical axis. The driving magnet (310) may be arranged to overlap the coil (320) in a first direction (X-axis direction) perpendicular to the optical axis direction. The driving magnet (310) may face the coil (320) in the X-axis direction perpendicular to the optical axis direction. The driving magnet (310) may be arranged to face the coil (320). The driving magnet (310) may be arranged to face the coil (320) in the X-axis direction perpendicular to the optical axis direction. The driving magnet (310) may face the coil (320). The driving magnet (310) may face the coil (320). The driving magnet (310) may be arranged at a position corresponding to the coil (320). The driving magnet (310) can interact with the coil (320). The driving magnet (310) can interact electromagnetically with the coil (320). The driving magnet (310) can move. The driving magnet (310) can be arranged to be movable. For example, the coil (320) can generate an electromagnetic force through an electromagnetic interaction with the driving magnet (310). At this time, an electromagnetic force is applied to the coil (320), but since the coil (320) is fixed, the driving magnet (310) of the moving part (200) can move in the optical axis direction. The driving magnet (310) can move during AF driving. The driving magnet (310) can move together with the holder (210). The driving magnet (310) can move in the optical axis direction. When current is applied to the coil (320), the driving magnet (310) can move in the direction of the optical axis.

[0109] The driving magnet (310) may include a magnet with multiple poles. For example, the driving magnet (310) may be a four-pole magnet. The driving magnet (310) may include a four-pole magnetizing magnet. The driving magnet (310) may include a lower magnet portion (311) including a north pole and a south pole. The driving magnet (310) may include an upper magnet portion (312) including a south pole and a north pole. The driving magnet (310) may include a neutral portion (313) disposed between the lower magnet portion (311) and the upper magnet portion (312).

[0110] The upper magnet part (312) may be placed on the lower magnet part (311). The lower magnet part (311) and the upper magnet part (312) may be placed in the direction of the optical axis. The lower magnet part (311) and the upper magnet part (312) may be spaced apart from each other in the direction of the optical axis. A neutral part (313) may be placed between the lower magnet part (311) and the upper magnet part (312).

[0111] The lens driving device (10) may include a coil (320). The driving unit (300) may include the 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 fixing 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 on the outer side of the driving magnet (310). The coil (320) may be disposed between the side plate (132) of the cover (130) and the driving 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) can interact with the driving magnet (310). The coil (320) can face the driving magnet (310). The coil (320) can face the driving magnet (310). The coil (320) can be disposed at a position corresponding to the driving magnet (310). The coil (320) can overlap the driving magnet (310) in a direction perpendicular to the optical axis. The coil (320) can overlap the driving magnet (310) in the X-axis direction perpendicular to the optical axis direction. The coil (320) can be disposed between the driving magnet (310) and the repulsive magnet (500). At least a portion of the coil (320) can overlap the driving magnet (310) and the repulsive magnet (500) in a horizontal direction.

[0112] The lens driving device (10) may include a sensor (330). The driving unit (300) may include the sensor (330). The sensor (330) may detect the driving magnet (310). The sensor (330) may be disposed on the substrate (120). The sensor (330) may be disposed within the coil (320) or outside the coil (320). For example, the sensor (330) may be disposed to be misaligned with the repulsive magnet (500) in the first direction (X-axis direction). The sensor (330) may be a Hall sensor. The sensor (330) may be disposed on the lower surface of the fixing unit (100) rather than on the side surface. For example, the sensor (330) may be located on the side surface of the base (110). In addition, the sensor (300) may not be disposed in the internal hole of the coil (3200). Accordingly, the design of the internal hole or width of the coil (320) can be variously adjusted. In other words, improved electromagnetic force can be easily secured by adjusting the winding of the coil (320). The movement amount or position of the driving magnet (310) detected by the sensor (330) can be used for feedback of autofocus driving. For example, the length in the optical axis direction of the internal hole or width of the coil (320) can be 0.1 mm to 0.6 mm. In addition, the length in the optical axis direction of the sensor (330) can be 0.3 mm to 0.5 mm. For example, the length in the optical axis direction of the sensor (300) can be different from the length in the optical axis direction of the hole inside the coil (320). The length in the optical axis direction of the sensor (300) can be greater than the length in the optical axis direction of the hole inside the coil (320).

[0113] Alternatively, the sensor (330) may be a driver IC. The driver IC may include a Hall element that detects the driving 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 current to the coil (320).

[0114] The lens driving device (10) may include a capacitor (340). The driving unit (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 detected by the sensor (330).

[0115] 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 member (200) relative to the fixed member (100) in a specific direction. In a modified example, the ball (400) of the present embodiment may be replaced with a shaft. In this case, the tilt phenomenon of the moving member (200) may be prevented.

[0116] The lens driving device (10) may include a ball (400). The ball (400) may guide movement of the moving part (200) relative to the fixed part (100) in the optical axis direction. The ball (400) may guide movement of the holder (210) relative to the base (110) in the optical axis direction. The ball (400) may be placed between the fixed part (100) and the moving part (200). The ball (400) may be placed between the base (110) and the holder (210). The ball (400) may be placed between the base (110) and the holder (210) in the X-axis direction. Alternatively, the ball (400) may be placed between the base (110) and the holder (210) in the Y-axis direction. The ball (400) may be placed in the groove (114) of the base (110). The ball (400) may be placed in the groove (212) of the holder (210). The ball (400) may be spherical. The ball (400) may be formed of metal. The ball (400) may be formed of a non-magnetic material. Grease may be applied to the surface of the ball (400).

[0117] The repulsive magnet (500) can be placed on the fixed part. The repulsive magnet (500) can be placed on the base (110). In addition, the repulsive magnet (500) can be placed on the rear of the coil (320). Accordingly, it is easy to maintain the posture of the moving part (200) with respect to the fixed part (100) without a yoke.

[0118] As illustrated in FIG. 20, the distance between the ball (400) and the optical axis (OA) (see A in FIG. 20) may be equal to the distance between the repulsive magnet (500) and the optical axis (OA) (see D in FIG. 20). Alternatively, the distance between the ball (400) and the optical axis (OA) (see A in FIG. 20) may be shorter than the distance between the repulsive magnet (500) and the optical axis (OA) (see D in FIG. 20). In another alternative, the distance between the ball (400) and the optical axis (OA) (see A in FIG. 20) may be longer than the distance between the repulsive magnet (500) and the optical axis (OA) (see D in FIG. 20). The distance between the ball (400) and the optical axis (OA) may be a shortest distance. The distance between the ball (400) and the optical axis (OA) may be a distance in a direction perpendicular to the optical axis (OA). The distance between the repulsive magnet (500) and the optical axis (OA) may be the shortest distance. The distance between the repulsive magnet (500) and the optical axis (OA) may be a distance in a direction perpendicular to the optical axis (OA).

[0119] In addition, the center of the repulsive magnet (500) (or the second magnet) in the second direction (Y-axis direction) may be arranged eccentrically with respect to the center of the driving magnet (310) (or the first magnet). By this configuration, a load or a holding force can be applied to one area. Accordingly, axis management can be facilitated with one area as a reference axis. For example, when the repulsive magnet (500) is eccentric with respect to the driving magnet (310), the side where the repulsive magnet (500) is eccentric can be easily managed based on the holding force (e.g., the pressing force due to the repulsive force). In addition, since axis management is facilitated, the height of the lens driving device (10) can be adjusted (e.g., lowered) or the design management can be easily controlled for the movement of the relatively heavy driving unit (300).

[0120] In an embodiment, the second line (AX2) bisector of the repulsive magnet (500) in the second direction (Y-axis direction) may be positioned to be offset from the first line (AX1) bisector of the driving magnet (310) in the second direction (Y-axis direction). In addition, the second line (AX2) bisector of the repulsive magnet (500) in the second direction (Y-axis direction) may not be positioned at the same position as the first line (AX1) bisector of the driving magnet (310) in the second direction (Y-axis direction). In addition, the second line (AX2) bisector of the repulsive magnet (500) in the second direction (Y-axis direction) may not correspond to the first line (AX1) bisector of the driving magnet (310) in the second direction (Y-axis direction).

[0121] The second line (AX2), which is a bisector in the second direction (Y-axis direction) of the repulsive magnet (500), can be arranged parallel to the first line (AX1), which is a bisector in the second direction (Y-axis direction) of the driving magnet (310). By this configuration, the interaction between the repulsive magnet (500) and the driving magnet (310) can occur in a balanced manner in the optical axis direction. Accordingly, the movement of the moving part can also be accurately controlled.

[0122] As a variation, the second line (AX2), which is a bisector in the second direction (Y-axis direction) of the repulsive magnet (500), may not be parallel to the first line (AX1), which is a bisector in the second direction (Y-axis direction) of the driving magnet (310), and may be inclined at a predetermined angle to each other.

[0123] Furthermore, the coil (320) can be placed between the repulsive magnet (500) and the driving magnet (310). By this configuration, the force (e.g., electromagnetic force) generated by the interaction between the coil (320) and the driving magnet (310) can be increased, while the interaction (e.g., repulsive force) between the repulsive magnet (500) and the driving magnet (310) can be easily maintained at a level lower than the electromagnetic force.

[0124] Additionally, in the embodiment, the third line (AX3), which is the bisector in the second direction (Y-axis direction) of the coil (320), may be arranged to be misaligned with the second line (AX2), which is the bisector of the repulsive magnet (500).

[0125] And the third line (AX3) which is the bisector in the second direction (Y-axis direction) of the coil (320) may correspond to the first line (AX1) which is the bisector of the driving magnet (310). For example, the third line (AX3) which is the bisector in the second direction (Y-axis direction) of the coil (320) may be aborted in the first direction with the first line (AX1) which is the bisector of the driving magnet (310). In addition, the third line (AX3) which is the bisector in the second direction (Y-axis direction) of the coil (320) may be identical to the first line (AX1) which is the bisector of the driving magnet (310).

[0126] For example, the third line (AX3), which is a bisector in the second direction (Y-axis direction) of the coil (320), may be located in an area between the second line (AX2), which is a bisector of the repulsive magnet (500), and the first line (AX1), which is a bisector in the second direction of the driving magnet (310).

[0127] As a variation, as shown in Fig. 16(b), the third line (AX3), which is the bisector of the coil (320) in the second direction (Y-axis direction), may be positioned to correspond to the second line (AX2), which is the bisector of the repulsive magnet (500). Furthermore, the third line (AX3), which is the bisector of the coil (320) in the second direction (Y-axis direction), may be positioned to be offset from the first line (AX1), which is the bisector of the driving magnet (310).

[0128] In addition, the fourth line (AX4), which is a bisector in the second direction (Y-axis direction) of the holder (210), may not correspond to the second line (AX2), which is a bisector in the second direction (Y-axis direction) of the repulsive magnet (500). In addition, the fourth line (AX4), which is a bisector in the second direction (Y-axis direction) of the holder (210), may be arranged to be offset from the second line (AX2), which is a bisector in the second direction (Y-axis direction) of the repulsive magnet (500). In addition, the optical axis or the central axis (OA) of the holder (210) may be arranged to be eccentric with respect to the center of the repulsive magnet (500). That is, the optical axis or the central axis (OA) of the holder (210) may be arranged to be offset from the second line (AX2), which is a bisector in the second direction of the repulsive magnet (500), in the first direction.

[0129] In addition, the fifth line (AX5), which is the second direction (Y-axis direction) bisector of the virtual line (VX) connecting the first ball (410) and the second ball (420), may not correspond to the second line (AX2), which is the second direction (Y-axis direction) bisector of the repulsive magnet (500). The fifth line (AX5), which is the second direction (Y-axis direction) bisector of the virtual line (VX) connecting the first ball (410) and the second ball (420), may be arranged to be misaligned with the second line (AX2), which is the second direction (Y-axis direction) bisector of the repulsive magnet (500). That is, the fifth line (AX5), which is the second direction (Y-axis direction) bisector of the virtual line (VX) connecting the first ball (410) and the second ball (420), can be eccentric with the second line (AX2), which is the second direction (Y-axis direction) bisector of the repulsive magnet (500).

[0130] According to an embodiment, the second line (AX2) which is a bisector in the second direction of the repulsive magnet (500) may be eccentric with the bisector in the second direction (Y-axis direction) of the driving magnet (310) (or the moving part, the lens, the fixed part, between the first ball and the second ball, the coil). That is, the second line (AX2) which is a bisector in the second direction of the repulsive magnet (500) may be arranged to be misaligned with the bisector in the second direction (Y-axis direction) of the driving magnet (310) (or the moving part, the lens, the fixed part, between the first ball and the second ball, the coil).

[0131] In addition, the distance (L2) between the center (CP) of the repulsive magnet (500) and the first ball (410) may be different from the distance (L1) between the center (CP) of the repulsive magnet (500) and the second ball (420). For example, the distance (L2) between the center (CP) of the repulsive magnet (500) and the first ball (410) may be greater than the distance (L1) between the center (CP) of the repulsive magnet (500) and the second ball (420). And as illustrated in FIG. 20, the distance between the ball (400) and the optical axis (OA) (see A of FIG. 20) may be shorter than the distance between the end of the driving magnet (310) and the optical axis (OA) (see B of FIG. 20). Additionally, as illustrated in FIG. 20, the distance between the ball (400) and the optical axis (OA) (see A in FIG. 20) may be longer than the distance between the center of the driving magnet (310) and the optical axis (OA) (see C in FIG. 20).

[0132] The ball (400) may be spaced apart from the optical axis by a first distance. At least a portion of the drive magnet (310) may be spaced apart from the optical axis by a greater distance than the first distance. The drive magnet (310) may include a first region that is spaced apart from the optical axis by a greater distance than the first distance. The drive magnet (310) may include a second region that is spaced apart from the optical axis by a lesser distance than the first distance. The drive magnet (310) may include a third region that is spaced apart from the optical axis by the first distance. In this case, the first region may be an end region of the drive magnet (310), the second region may be a center region of the drive magnet (310), and the third region may be a region between the first region and the second region of the drive magnet (310). Alternatively, the distance between the ball (400) and the optical axis may be less than a shortest distance between the drive magnet (310) and the optical axis. That is, the ball (400) can be placed closer to the optical axis than the driving magnet (310).

[0133] When viewed from above, the side plate (112) of the base (110), the first part (211) of the holder (210), the ball (400), the column part (113) of the base (110), the holder (210), and the side plate (112) of the base (110) can be arranged in order on an imaginary straight line.

[0134] The ball (400) may include a plurality of balls. The ball (400) may include a plurality of unit balls. The balls (400) may be provided in two sets of three balls each, with a total of six balls. The ball (400) may include a first ball (410) and a second ball (420). The first ball (410) may be arranged on an imaginary straight line connecting the optical axis and the first corner of the base (110). The second ball (420) may be arranged on an imaginary straight line connecting the optical axis and the 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 driving magnet (310). The second ball (420) may be arranged on the other side of the driving magnet (310).

[0135] When viewed from above, the distance between the first ball (410) and the second ball (420) may be greater than the width of the driving magnet (310).

[0136] Additionally, the first ball (410) and the second ball (420) may have the same or different sizes. In an embodiment, the first ball (410) and the second ball (420) may have the same sizes.

[0137] And the first ball (410) and the second ball (420) may be composed of multiple balls. In addition, the number of the first ball (410) and the number of the second ball (420) may be the same or different from each other.

[0138] Additionally, the moving part (200), the ball (400) and the fixed part (100) may be sequentially arranged in the first direction or from the inside (e.g., the optical axis) to the outside. For example, the moving part (200), the ball (400) and the fixed part (100) may overlap each other to the outside.

[0139] The lens driving device (10) may include a repulsive magnet (500). The repulsive magnet (500) may be placed on a fixing member (100). The repulsive magnet (500) may be fixed to the fixing member (100). The repulsive magnet (500) may be coupled to the fixing member (100). The repulsive magnet (500) may be bonded to the fixing member (100) with an adhesive. The repulsive magnet (500) may be placed on a base (110). The repulsive magnet (500) may be fixed to the base (110). The repulsive magnet (500) may be bonded to the base (110). The repulsive magnet (500) may be bonded to the base (110) with an adhesive. The repulsive magnet (500) may be placed on a substrate (120). The repulsive magnet (500) can be fixed to the substrate (120). The repulsive magnet (500) can be coupled to the substrate (120). The repulsive magnet (500) can be bonded to the substrate (120) with an adhesive. The repulsive magnet (500) can be disposed on the outer surface of the substrate (120). The repulsive magnet (500) can be disposed on the cover (130). The repulsive magnet (500) can be fixed to the cover (130). The repulsive magnet (500) can be coupled to the cover (130). The repulsive magnet (500) can be bonded to the cover (130) with an adhesive. The repulsive magnet (500) can be disposed on a step of the base (110). The repulsive force magnet (500) can be placed in a groove formed concavely on the side of the base (110).

[0140] In addition, the bisector in the second direction (Y-axis direction) of the base (110) may overlap the optical axis (OA) in the first direction (X-axis direction). Accordingly, the bisector in the second direction (Y-axis direction) of the base (110) may be parallel to the optical axis (OA). Hereinafter, the bisector in the second direction (Y-axis direction) of the base (110) will be described interchangeably with the optical axis (OA).

[0141] The optical axis (OA), which is a bisector in the second direction of the base (110), and the second line (AX2), which is a bisector in the second direction (Y-axis direction) of the repulsive magnet (500), may be arranged to be misaligned in the second direction. That is, the optical axis (OA), which is a bisector in the second direction of the base (110), and the second line (AX2), which is a bisector in the second direction (Y-axis direction) of the repulsive magnet (500), may be arranged to be spaced apart from each other by a predetermined distance (UO) in the second direction. The base (110) and the repulsive magnet (500) may be arranged eccentrically with respect to each other.

[0142] The repulsive magnet (500) can press the driving magnet (310) toward the ball (400). In other words, the repulsive magnet (500) can cause the ball (400) to be pressed between the fixed part (100) and the moving part (200). The repulsive magnet (500) can press the moving part (200) toward the ball (400). The repulsive magnet (500) can press the holder (210) toward the ball (400). The repulsive magnet (500) can pinch the ball (400) between the fixed part (100) and the moving part (200) through interaction with the spaced driving magnet (310). The repulsive magnet (500) can bring the ball (400) into close contact between the fixed part (100) and the moving part (200) through interaction with the driving magnet (310). The repulsive magnet (500) can exert a repulsive force on the spaced driving magnet (310). A repulsive force can be generated between the repulsive magnet (500) and the driving magnet (310). The repulsive magnet (500) can be arranged to generate a repulsive force with the driving magnet (310). The repulsive magnet (500) can repel the driving magnet (310). The repulsive magnet (500) can be formed so that the ball (400) is sandwiched between the fixed part (100) and the moving part (200). The repulsive force magnet (500) can pressurize the driving magnet (310) so that the ball (400) is pressed between the fixed part (100) and the moving part (200).

[0143] The coil (320) may overlap with the repulsive magnet (500) in the X-axis direction. At least a portion of the coil (320) may be disposed between the driving magnet (310) and the repulsive magnet (500) in the X-axis direction. The distance between the top and bottom of the coil (320) may be 60 to 80% of the distance between the top and bottom of the repulsive magnet (500). The distance between the top and bottom of the coil (320) may be 65 to 75% of the distance between the top and bottom of the repulsive magnet (500).

[0144] In the direction of the optical axis, the length of the repulsive magnet (500) may be greater than the length of the driving magnet (310). By this configuration, auto-focusing can be driven more easily. The upper surface of the repulsive magnet (500) may be positioned higher than the upper surface of the driving magnet (310). In the initial position where no current is applied to the coil (320), the upper surface of the repulsive magnet (500) may be positioned higher than the upper surface of the driving magnet (310). The lower surface of the repulsive magnet (500) may be positioned lower than the lower surface of the driving magnet (310). In the initial position where no current is applied to the coil (320), the lower surface of the repulsive magnet (500) may be positioned lower than the lower surface of the driving magnet (310).

[0145] In the Y-axis direction, the length of the repulsive magnet (500) may be 15 to 40% of the length of the driving magnet (310). Alternatively, in the Y-axis direction, the length of the repulsive magnet (500) may be 10 to 50% of the length of the driving magnet (310).

[0146] In the X-axis direction, the thickness of the repulsive magnet (500) may be smaller than the thickness of the drive magnet (310). In the X-axis direction, the thickness of the repulsive magnet (500) may be 70 to 90% of the thickness of the drive magnet (310). In the X-axis direction, the thickness of the repulsive magnet (500) may be 75 to 85% of the thickness of the drive magnet (310). Alternatively, in the X-axis direction, the thickness of the repulsive magnet (500) may be equal to the thickness of the drive magnet (310). Alternatively, in the X-axis direction, the thickness of the repulsive magnet (500) may be larger than the thickness of the drive magnet (310).

[0147] In the direction of the optical axis, the length of the upper magnet portion (520) of the repulsive magnet (500) may be 10 to 50% of the length of the neutral portion (530) of the repulsive magnet (500). In the direction of the optical axis, the length of the upper magnet portion (520) of the repulsive magnet (500) may be 20 to 40% of the length of the neutral portion (530) of the repulsive magnet (500). If the length of the upper magnet portion (520) is less than the mentioned critical value, the repulsive force becomes weak and the ball pressing force becomes insufficient, and if it is greater than the mentioned critical value, a problem may occur in which an attractive force is generated in some areas when the driving magnet (310) moves.

[0148] When a forward current is applied to the coil (320) and the moving part (200) moves as much upward as possible in the direction of the optical axis, the upper end of the neutral part (313) of the driving magnet (310) can be placed at the same height as the upper end of the neutral part (530) of the repulsive magnet (500). When a reverse current is applied to the coil (320) and the moving part (200) moves as much downward as possible in the direction of the optical axis, the lower end of the neutral part (313) of the driving magnet (310) can be placed at the same height as the lower end of the neutral part (530) of the repulsive magnet (500).

[0149] The repulsive magnet (500) may overlap with the driving magnet (310) in the X-axis direction. At least a portion of the repulsive magnet (500) may overlap with the driving magnet (310) in the X-axis direction. At least a portion of the repulsive magnet (500) may overlap with the driving magnet (310) in the X-axis direction. The repulsive magnet (500) may include a first portion that overlaps with the driving magnet (310) in the X-axis direction, and a second portion that does not overlap with the driving magnet (310) in the X-axis direction. The second portion may protrude upwardly and downwardly more than the first portion.

[0150] The repulsive magnet (500) may be a four-pole magnet. The repulsive magnet (500) may include a four-pole magnetizing 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). In the optical axis direction, 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) may be shorter than the sum of the lengths of the lower magnet portion (510) and the upper magnet portion (520).

[0151] The upper magnet part (520) may be placed on the lower magnet part (510). The lower magnet part (510) and the upper magnet part (520) may be placed in the direction of the optical axis. The lower magnet part (510) and the upper magnet part (520) may be spaced apart from each other in the direction of the optical axis. A neutral part (530) may be placed between the lower magnet part (510) and the upper magnet part (520).

[0152] The N pole of the lower magnet portion (510) of the repulsive magnet (500) may face the N pole of the lower magnet portion (311) of the driving magnet (310). The S pole of the upper magnet portion (520) of the repulsive magnet (500) may face the S pole of the upper magnet portion (312) of the driving magnet (310). That is, the repulsive magnet (500) and the driving magnet (310) may be arranged so that the same poles face each other.

[0153] 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 driving magnet (310). The length of the lower magnet portion (510) of the repulsive magnet (500) may be 60 to 72% of the length of the lower magnet portion (311) of the driving magnet (310). The length of the lower magnet portion (510) of the repulsive magnet (500) may be 55 to 77% of the length of the lower magnet portion (311) of the driving magnet (310).

[0154] 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 driving magnet (310). The length of the upper magnet portion (520) of the repulsive magnet (500) may be 60 to 72% of the length of the upper magnet portion (312) of the driving magnet (310). The length of the upper magnet portion (520) of the repulsive magnet (500) may be 55 to 77% of the length of the upper magnet portion (312) of the driving magnet (310).

[0155] In the optical axis direction, the length of the neutral part (530) of the repulsive magnet (500) may be longer than the length of the neutral part (313) of the driving magnet (310) (see (a) of FIG. 19). Through this structure, an area where an attractive force acts between the driving magnet (310) and the repulsive magnet (500) may not occur in the entire section when the driving magnet (310) moves up and down. In the optical axis direction, the length of the repulsive magnet (500) may be longer than the length of the driving magnet (310). In the optical axis direction, the length of the lower magnet part (510) of the repulsive magnet (500) may be shorter than the length of the lower magnet part (311) of the driving 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 driving magnet (310).

[0156] In the optical axis direction, the length of the neutral part (313) of the driving magnet (310) may be 20 to 30% of the length of the neutral part (530) of the repulsive magnet (500). In the optical axis direction, the length of the neutral part (313) of the driving magnet (310) may be 15 to 35% of the length of the neutral part (530) of the repulsive magnet (500).

[0157] When the driving magnet (310) is moved as far downward as possible in the direction of the optical axis, the first boundary between the lower magnet portion (311) of the driving magnet (310) and the neutral portion (313) of the driving magnet (310) can be arranged at the same height as the 3 / 4 point, i.e., the 75% point (c of (c) of FIG. 19) above the neutral portion (530) of the repulsive magnet (500) (see (c) of FIG. 19).

[0158] As a variation, when the driving magnet (310) is moved as far downward as possible in the direction of the optical axis, the first boundary between the lower magnet portion (311) of the driving magnet (310) and the neutral portion (313) of the driving magnet (310) may be arranged at the same height as the first boundary between the lower magnet portion (510) of the repulsive magnet (500) and the neutral portion (530) of the repulsive magnet (500).

[0159] In another variation, when the driving magnet (310) is moved as far downward as possible in the direction of the optical axis, the first boundary between the lower magnet portion (311) of the driving magnet (310) and the neutral portion (313) of the driving magnet (310) may be arranged at a lower height 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).

[0160] In another variation, when the driving magnet (310) is moved as far downward as possible in the direction of the optical axis, the first boundary between the lower magnet portion (311) of the driving magnet (310) and the neutral portion (313) of the driving magnet (310) may be arranged at a higher height 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).

[0161] When the driving magnet (310) is moved as far upward as possible in the direction of the optical axis, the second boundary between the upper magnet portion (312) of the driving magnet (310) and the neutral portion (313) of the driving magnet (310) can be arranged at a height equal to the 1 / 4 point, i.e., the 25% point (b of FIG. 21(b)), from the neutral portion (530) of the repulsive magnet (500) (see (b) of FIG. 21).

[0162] As a variation, when the driving magnet (310) is moved as far upward as possible in the direction of the optical axis, the second boundary between the upper magnet portion (312) of the driving magnet (310) and the neutral portion (313) of the driving magnet (310) may be arranged at the same height as the second boundary between the upper magnet portion (520) of the repulsive magnet (500) and the neutral portion (530) of the repulsive magnet (500).

[0163] In another variation, when the driving magnet (310) is moved as far upward as possible in the direction of the optical axis, the second boundary between the upper magnet portion (312) of the driving magnet (310) and the neutral portion (313) of the driving magnet (310) may be arranged at a high height relative to the second boundary between the upper magnet portion (520) of the repulsive magnet (500) and the neutral portion (530) of the repulsive magnet (500).

[0164] In another variation, when the driving magnet (310) is moved as far upward as possible in the direction of the optical axis, the second boundary between the upper magnet portion (312) of the driving magnet (310) and the neutral portion (313) of the driving magnet (310) may be arranged at a lower height 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).

[0165] In this embodiment, even when the driving magnet (310) moves through the structure mentioned above, the phenomenon of the different polarities of the driving magnet (310) and the repulsive magnet (500) facing each other can be prevented.

[0166] Hereinafter, the auto focus (AF) driving of a lens driving device according to one embodiment of the present invention will be described with reference to the drawings.

[0167] Figures 21 to 23 are diagrams for explaining the autofocus driving of a lens driving device according to one embodiment of the present invention. Figure 21 is a cross-sectional view showing the appearance of the moving part in the initial state where no current is applied to the coil. Figure 22 is a cross-sectional view showing the appearance of the moving part moving upward in the direction of the optical axis when forward current is applied to the coil. Figure 23 is a cross-sectional view showing the appearance of the moving part moving downward in the direction of the optical axis when reverse current is applied to the coil.

[0168] As illustrated in Fig. 21, the moving part (200) can be positioned at a position spaced apart from both the top plate (131) of the cover (130) and the base (110) in an initial position where no current is applied to the coil (320).

[0169] When a forward current is applied to the coil (320), the driving magnet (310) can move upward in the optical axis direction due to the electromagnetic interaction between the coil (320) and the driving magnet (310) (see A of FIG. 22). At this time, the holder (210) can move upward in the optical axis direction together with the driving magnet (310). Furthermore, the lens can move upward in the optical axis direction together with the holder (210). Accordingly, the distance between the lens and the image sensor can be changed, so that the focus of the image formed on the image sensor through the lens can be adjusted.

[0170] When a reverse current is applied to the coil (320), the driving magnet (310) can move downward in the optical axis direction due to the electromagnetic interaction between the coil (320) and the driving magnet (310) (see B of FIG. 23). At this time, the holder (210) can move downward in the optical axis direction together with the driving magnet (310). Furthermore, the lens can move downward in the optical axis direction together with the holder (210). Accordingly, the distance between the lens and the image sensor can be changed, so that the focus of the image formed on the image sensor through the lens can be adjusted.

[0171] Meanwhile, during the movement of the driving magnet (310), the sensor (330) can detect the strength of the magnetic field of the driving magnet (310) to detect the amount of movement or position of the lens in the direction of the optical axis. The amount of movement or position of the lens in the direction of the optical axis detected by the sensor (330) can be used for autofocus feedback control.

[0172] Fig. 24 is a perspective view of a lens driving device according to another embodiment of the present invention. Fig. 25 is a perspective view of a lens driving device according to another embodiment of the present invention with the cover omitted. Fig. 26 is a cross-sectional view of a lens driving device according to another embodiment of the present invention, cut perpendicular to the optical axis and viewed from above.

[0173] Referring to FIGS. 24 to 26, a lens driving device (10') according to another embodiment can be applied to the same descriptions of the fixed part (100), the moving part (200), the driving part (300), the ball (400), and the repulsive magnet (500) in the lens driving devices of various embodiments of the present invention, except for the contents described below.

[0174] In an embodiment, 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 member (200) relative to the fixed member (100) in a specific direction.

[0175] Additionally, the lens driving device (10) may include a ball (400). The ball (400) may guide movement of the moving part (200) relative to the fixed part (100) in the direction of the optical axis. The ball (400) may guide movement of the holder (210) relative to the base (110) in the direction of the optical axis.

[0176] The ball (400) may be placed between the fixed part (100) and the moving part (200). At this time, the ball (400) may be placed between the base (110) and the holder (210). The ball (400) may be placed between the base (110) and the holder (210) in the X-axis direction. The ball (400) may be placed between the base (110) and the holder (210) in the Y-axis direction. The ball (400) may be formed of metal. The ball (400) may be formed non-magnetically. Grease may be applied to the surface of the ball (400).

[0177] Furthermore, the driving magnet (310) may be placed between the ball (400) and the repulsive magnet (500). The separation distance (e.g., length in the second direction) between the ball (400) and the driving magnet (310) may be smaller than the separation distance (e.g., length in the second direction) between the ball (400) and the repulsive magnet (500).

[0178] Additionally, the substrate (120) may be placed between the ball (400) and the repulsive magnet (500). The ball (400) may have a smaller separation distance from the repulsive magnet (500) than from the substrate (120).

[0179] Additionally, the coil (320) may be placed between the ball (400) and the repulsive magnet (500) (or substrate). The distance between the ball (400) and the coil (320) may be smaller than the distance between the ball (400) and the repulsive magnet (500) (or substrate).

[0180] Fig. 27 is a perspective view of a lens driving device according to another embodiment of the present invention. Fig. 28 is a cross-sectional perspective view of a lens driving device according to another embodiment of the present invention, cut away from a portion. Fig. 29 is a cross-sectional view of a lens driving device according to another embodiment of the present invention, cut perpendicular to the optical axis and viewed from above.

[0181] In another embodiment, the lens driving device (10') according to the present invention may be applied to the same descriptions of the fixed part (100), the moving part (200), the driving part (300), the ball (400), and the repulsive magnet (500) in the lens driving device of various embodiments of the present invention, except for the contents described below.

[0182] In an embodiment, the lens driving device (10) may include a guide member. The guide member may include a ball (400). Other descriptions may be equally applicable to other embodiments as described above.

[0183] In this embodiment, the ball (400) may include a first ball (410) and a second ball (420) that are spaced apart. In an embodiment, the first ball (410) and the second ball (420) may have different sizes.

[0184] For example, one of the first ball (410) and the second ball (420) may have a different distance from the repulsive magnet (500) than the other. That is, the distance between the first ball (410) and the repulsive magnet (500) may be different from the distance between the second ball (420) and the repulsive magnet (500).

[0185] In an embodiment, the first ball (410) may be arranged adjacent to the repulsive magnet (500) relative to the second ball (420). And the first ball (410) may be different in size from the second ball (420). The first ball (410) may be larger than the second ball (420). For example, the diameter (r1) of the first ball (410) may be different from the diameter (r21) of the second ball (420). The diameter (r1) of the first ball (410) may be larger than the diameter (r2) of the second ball (420). Alternatively, the volume of the first ball (410) may be larger than the volume of the second ball (420). Alternatively, the volume of the first ball (410) may have a length in one direction that is different from the length in one direction of the second ball (420).

[0186] Hereinafter, a camera device according to one embodiment of the present invention will be described with reference to the drawings.

[0187] Figure 30 is an exploded perspective view of a camera device according to one embodiment of the present invention.

[0188] The camera device (10A) may include a camera module.

[0189] The camera device (10A) may include a lens module (20). The lens module (20) may include at least one lens. The lens may be positioned corresponding to the image sensor (60). The lens module (20) may include a lens and a 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 screw coupling and / or adhesive. The lens module (20) may be moved integrally with the holder (210).

[0190] The camera device (10A) may include a filter (30). The filter (30) may block light of a specific frequency band from passing through the lens module (20) from being incident on the image sensor (60). The filter (30) may be arranged parallel to the xy plane. The filter (30) may be arranged between the lens module (20) and the image sensor (60). The filter (30) may be arranged on the sensor base (40). Alternatively, the filter (30) may be arranged on the base (110). The filter (30) may include an infrared filter. The infrared filter may block light in the infrared region from being incident on the image sensor (60).

[0191] The camera device (10A) may include a sensor base (40). The sensor base (40) may be disposed between the lens driving device (10) and the printed circuit board (50). The sensor base (40) may include a protrusion (41) on which a filter (30) is disposed. An opening may be formed in a portion of the sensor base (40) on which the filter (30) is disposed so that light passing through the filter (30) may be incident on the image sensor (60). The adhesive member may couple or adhere the base (110) of the lens driving device (10) to the sensor base (40). The adhesive member may additionally serve to prevent foreign substances from entering the interior of the lens driving device (10). The adhesive member may include at least one of an epoxy, a thermosetting adhesive, and an ultraviolet-curable adhesive.

[0192] In a variant, 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 lower surface of the base (110) of the lens driving device (10). In addition, in a variant, 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). At this time, 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 a leg portion, which is an outer wall mounted on the printed circuit board (50). The sensor holder (40) may correspond to the sensor base.

[0193] 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. A lens driving device (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 driving device (10). The printed circuit board (50) may be electrically connected to the lens driving device (10). An image sensor (60) may be disposed on the printed circuit board (50). Various circuits, elements, control units, etc. may be provided on the printed circuit board (50) to convert an image formed on the image sensor (60) into an electrical signal and transmit it to an external device.

[0194] The camera device (10A) may include an image sensor (60). The image sensor (60) may be configured to form an image by incident light passing through a lens and a filter (30). The image sensor (60) may be mounted on a printed circuit board (50). The image sensor (60) may be electrically connected to the printed circuit board (50). For example, the image sensor (60) may be coupled to the printed circuit board (50) using surface mounting technology (SMT). As another example, the image sensor (60) may be coupled to the printed circuit board (50) using flip chip technology. The image sensor (60) may be arranged such that its optical axis is aligned with that of the lens. That is, the optical axis of the image sensor (60) and the optical axis of the lens may be aligned. The image sensor (60) can convert light irradiated onto the effective image area of ​​the image sensor (60) into an electrical signal. The image sensor (60) can be any one of a CCD (charge coupled device), a MOS (metal oxide semi-conductor), a CPD, and a CID.

[0195] The camera device (10A) may include a motion sensor (70). The motion sensor (70) may be mounted on a printed circuit board (50). The motion sensor (70) may be electrically connected to a control unit (80) through a circuit pattern provided on the printed circuit board (50). The motion sensor (70) may output rotational angular velocity information due 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.

[0196] The camera device (10A) may include a control unit (80). The control unit (80) may be disposed on a printed circuit board (50). The control unit (80) may be electrically connected to a coil (320) of a lens driving device (10). The control unit (80) may individually control the direction, intensity, amplitude, etc. of the current supplied to the coil (320). The control unit (80) may control the lens driving device (10) to perform an autofocus function and / or a shake correction function. Furthermore, the control unit (80) may perform autofocus feedback control and / or shake correction feedback control for the lens driving device (10).

[0197] The camera device (10A) may include a connector (90). The connector (90) may be electrically connected to a printed circuit board (50). The connector (90) may include a port for electrically connecting to an external device.

[0198] Hereinafter, an optical device according to one embodiment of the present invention will be described with reference to the drawings.

[0199] Fig. 31 is a perspective view of an optical device according to one embodiment of the present invention. Fig. 32 is a perspective view of an optical device according to a modified example.

[0200] The optical device (1) may include one or more of a mobile phone, a cell phone, a portable terminal, a mobile terminal, a smart phone, 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 device. The optical device (1) may include any device for taking images or photographs.

[0201] An 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 placed on the main body (20). The camera device (10A) may capture a subject. The optical device (1) may include a display. The display may be placed on the main body (20). The display may output one or more of images and videos captured by the camera device (10A). The display may be placed on a first surface of the main body (20). The camera device (10A) may be placed on one or more of the first surface of the main body (20) and a second surface opposite the first surface. As illustrated in FIG. 31, the camera device (10A) may have a triple camera positioned vertically. As illustrated in FIG. 32, the camera device (10A-1) may have a triple camera positioned horizontally.

[0202] Although the above description focuses on examples, these are merely examples and do not limit the present invention. Those skilled in the art will appreciate that various modifications and applications not exemplified above are possible without departing from the essential characteristics of the present invention. For example, each component specifically shown in the examples can be modified and implemented. In addition, differences related to such modifications and applications should be construed as being included within the scope of the present invention defined in the appended claims.

Claims

1. Fixed government; A movable part disposed within the above fixed part and capable of moving in the direction of the optical axis; A driving unit including a coil and a first magnet facing each other in a first direction perpendicular to the optical axis direction and moving the moving unit; a ball disposed between the moving part and the fixed part; and Including a second magnet spaced apart from the first magnet in the first direction and exerting a repulsive force; In a second direction perpendicular to the optical axis direction and the first direction, the center of the second magnet is arranged eccentrically with respect to the center of the first magnet, A lens driving device in which the coil is disposed between the first magnet and the second magnet.

2. In paragraph 1, A lens driving device in which the second bisector of the second magnet is arranged so as to be offset from the second bisector of the first magnet.

3. In paragraph 1, A lens driving device in which the bisector of the second direction of the coil is arranged to be misaligned with the bisector of the second magnet in the second direction.

4. In paragraph 1, The above fixed part includes a base, A lens driving device arranged so as to be offset from the bisector in the second direction of the base and the bisector in the second direction of the second magnet.

5. In paragraph 1, The above ball includes a first ball and a second ball that are spaced apart, A lens driving device in which the second direction bisector of the virtual line connecting the first ball and the second ball is arranged so as to be offset from the second direction bisector of the second magnet.

6. In paragraph 5, A lens driving device in which the sizes of the first ball and the second ball are different.

7. In paragraph 6, The first ball is positioned adjacent to the second magnet relative to the second ball, A lens driving device wherein the first ball is larger than the second ball.

8. In paragraph 1, A lens driving device in which the bisector of the second direction of the coil corresponds to the bisector of the second direction of the first magnet.

9. In paragraph 1, A lens driving device in which the bisector of the second direction of the above coil corresponds to the bisector of the second magnet in the second direction.

10. In paragraph 1, The second magnet is a lens driving device that causes the ball to be pressed between the fixed part and the moving part.

Images