Lens driving device, camera device, and optical device

Abstract

Disclosed is a lens driving device comprising: a fixed portion; a moving portion which is disposed within the fixed portion and 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; and a second magnet disposed spaced apart from the first magnet in the first direction so as to exert a repulsive force, wherein the first magnet includes a first magnet portion and a second magnet portion, and the second magnet includes a third magnet portion and a fourth magnet portion, and when the center of the first magnet and the center of the second magnet are positioned at the same height in the optical axis direction, a first length of the third magnet portion is less than or equal to a second length of the third magnet portion, the first length is an optical axis direction length of the third magnet portion, which overlaps the first magnet portion in the first direction, and the second length is an optical axis direction length of the third magnet portion, which does not overlap the first magnet portion in the first direction.

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 is a device that captures images or videos of a subject, and is installed in portable devices, drones, vehicles, etc. Camera modules may have an image stabilization (IS) function that compensates for or prevents image shaking caused by the user's movements to improve image quality, an auto focusing (AF) function that automatically adjusts the distance between the image sensor and the lens to align the focal length of the lens, and a zooming function that increases or decreases the magnification of a distant subject and captures it using a zoom lens.

[0003] When the lens assembly is driven inside the camera actuator, the driving of the lens assembly may become unstable due to the repulsive force between the magnets as the distance between the driving magnets changes. When the driving magnet strokes in the direction of the driving axis, the repulsive magnet pushes the driving magnet in the same direction as the driving direction, which may form an unstable structure. In addition, since the repulsive magnet pushes the driving magnet in the same direction as the driving direction, there is a problem that the force in the stroke direction increases as the stroke increases for a certain period, thereby increasing the force required for driving. Ultimately, this may cause a problem that affects the driving performance of the camera actuator.

[0004] The embodiment provides a camera actuator with improved driving stability and a camera module including the same.

[0005] In addition, a camera actuator with improved driving efficiency due to increased driving force and a camera module including the same are provided.

[0006] 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 embodiment of the problem described below is also included.

[0007] A lens driving device according to an embodiment 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; And a second magnet spaced apart from the first magnet in the first direction and exerting a repulsive force; wherein the first magnet includes a first magnet portion and a second magnet portion, and the second magnet includes a third magnet portion and a fourth magnet portion, and when the center of the first magnet and the center of the second magnet are located at the same height in the optical axis direction, a first length of the third magnet portion may be less than or equal to a second length of the third magnet portion, and the first length may be a length in the optical axis direction of the third magnet portion that overlaps the first magnet portion in the first direction, and the second length may be a length in the optical axis direction of the third magnet portion that does not overlap the first magnet portion in the first direction.

[0008] The first magnet and the third magnet are spaced apart in the first direction so that a repulsive force is applied, and the second magnet and the third magnet are spaced apart in the second direction, and the second direction may be a direction perpendicular to the optical axis direction and the first direction.

[0009] The third length of the fourth magnet portion may be less than or equal to the fourth length, the third length may be the optical axis direction length of the fourth magnet portion that overlaps the second magnet portion in the first direction, and the fourth length may be the optical axis direction length of the fourth magnet portion that does not overlap the second magnet portion in the first direction.

[0010] The first magnet portion and the second magnet portion may be spaced apart in the direction of the optical axis, the first magnet may include a first neutral portion arranged between the first magnet portion and the second magnet portion, the third magnet portion and the fourth magnet portion may be spaced apart in the direction of the optical axis, and the second magnet may include a second neutral portion arranged between the third magnet portion and the fourth magnet portion.

[0011] The second neutral portion may partially overlap the first magnet portion, the second magnet portion, and the first neutral portion in the first direction.

[0012] The distance between the outer surfaces of the second magnet and the third magnet in the second direction may be greater than the length of the first magnet in the second direction.

[0013] The coil is disposed between the second magnet and the third magnet, and the coil may partially overlap the second magnet and the third magnet in the second direction and may not overlap in the first direction.

[0014] The above driving unit includes a substrate on which the coil is arranged, and the second magnet and the third magnet may not overlap with the substrate in the first direction and the second direction.

[0015] It includes a ball disposed between the moving part and the fixed part, and the ball can overlap with the second magnet and the third magnet in the first direction.

[0016] The second length may be 1 to 1.5 times the first length.

[0017] The first length may be 0.71 mm to 0.79 mm, and the second length may be 0.81 mm to 0.89 mm.

[0018] When the center of the second magnet is positioned higher than the center of the first magnet, the first length of the third magnet portion may be greater than the second length.

[0019] When the center of the second magnet is positioned higher than the center of the first magnet, the first magnet portion and the third magnet portion can overlap in the first direction.

[0020] The center of the above coil may be located at the same height as the center of the second magnet in the direction of the optical axis.

[0021] A lens driving device according to an embodiment includes: a fixed part; a moving part disposed within the fixed part and movable in an optical axis direction; a driving part including a coil facing in a first direction perpendicular to the optical axis direction and moving the moving part, and a first magnet and a second magnet; and a third magnet spaced apart from the first magnet in the first direction and exerting a repulsive force, and a fourth magnet spaced apart from the second magnet in the first direction and exerting a repulsive force; wherein the optical axis direction length of the third magnet overlapping the first magnet in the first direction may be less than or equal to the optical axis direction length of the third magnet not overlapping the first magnet in the first direction.

[0022] The first magnet and the second magnet may be arranged at a certain distance apart in the optical axis direction, and may further include a first spacer arranged between the first magnet and the second magnet.

[0023] The third magnet and the fourth magnet are arranged at a certain distance apart in the direction of the optical axis, and a second spacer may be further included between the third magnet and the fourth magnet.

[0024] A fifth magnet spaced apart from the first magnet in the first direction so that a repulsive force is applied thereto and spaced apart from the third magnet, and a sixth magnet spaced apart from the second magnet in the first direction so that a repulsive force is applied thereto and spaced apart from the fourth magnet, wherein the third magnet overlaps the fifth magnet in the second direction, the fourth magnet overlaps the sixth magnet in the second direction, and the second direction may be a direction perpendicular to the optical axis direction and the first direction.

[0025] According to an embodiment, a camera actuator with improved driving stability and a camera module including the same can be provided.

[0026] In addition, a camera actuator with improved driving efficiency due to increased driving force and a camera module including the same can be provided.

[0027] 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.

[0028] FIG. 1 is a perspective view of a lens driving device according to one embodiment of the present invention.

[0029] Figure 2 is a cross-sectional view taken along line AA of Figure 1.

[0030] Figure 3 is a cross-sectional view taken along line BB of Figure 1.

[0031] Fig. 4 is a cross-sectional perspective view taken along CC of Fig. 1.

[0032] FIG. 5 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.

[0033] Figure 6 is an exploded perspective view of a lens driving device according to one embodiment of the present invention.

[0034] FIG. 7 is a perspective view showing a moving part and related configuration of a lens driving device according to one embodiment of the present invention.

[0035] FIG. 8 is a perspective view showing a fixing part and related configuration of a lens driving device according to one embodiment of the present invention.

[0036] FIG. 9 is a front view illustrating a first magnet and a second magnet of a lens driving device according to one embodiment of the present invention.

[0037] FIG. 10 is a top view illustrating a first magnet and a second magnet of a lens driving device according to one embodiment of the present invention.

[0038] FIG. 11 is a side view illustrating a first magnet and a second magnet of a lens driving device according to one embodiment of the present invention.

[0039] Figures 12 to 14 are tables showing the magnitude of the force acting on the first magnet according to the length relationship between the first region and the second region of the third magnet section.

[0040] FIG. 15 is a front view showing the first to sixth magnets of a lens driving device according to another embodiment of the present invention.

[0041] Fig. 16 is an exploded perspective view of a camera device according to one embodiment of the present invention.

[0042] Fig. 17 is a perspective view of an optical device according to one embodiment of the present invention.

[0043] Figure 18 is a perspective view of an optical device according to a modified example.

[0044] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0045] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0046] In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0047] Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0048] In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and / or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

[0049] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

[0050] These terms are intended only to distinguish one component from another, and are not intended to limit the nature, order, or sequence of the component.

[0051] And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, it may include not only cases where the component is directly connected, coupled or connected to the other component, but also cases where the component is 'connected', 'coupled' or 'connected' by another component between the component and the other component.

[0052] Additionally, when described as being formed or arranged "above or below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below", it can include the meaning of a downward direction as well as an upward direction based on one component.

[0053] The 'optical axis direction' used below is defined as the optical axis direction of the lens and / or image sensor coupled to the lens driving device.

[0054] 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.

[0055] 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.

[0056] 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.”

[0057] Hereinafter, one of the “driving magnet (310)” and the “repulsive magnet (500, 600)” may be referred to as the “first magnet” and the other may be referred to as the “second magnet”.

[0058] 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”.

[0059] Hereinafter, one of the “lower magnet part (510)” and the “upper magnet part (520)” may be referred to as the “third magnet part” and the other may be referred to as the “fourth magnet part”.

[0060] Hereinafter, the configuration of a lens driving device according to one embodiment of the present invention will be described with reference to the drawings.

[0061] 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. FIG. 4 is a cross-sectional perspective view taken along line CC of FIG. 1. FIG. 5 is a cross-sectional view taken along line BB of FIG. 1, taken along line 4 of FIG. 5, taken along line 5 of FIG. 5, taken along line 6 of FIG. 5, taken along line 7 of FIG. 5, taken along line 8 of FIG. 5, taken along line 9 of FIG. 5, taken along line 10 of FIG. 5, taken along line 11 of FIG. 5, taken along line 12 of FIG. 5, taken along line 13 of FIG. 5, taken along line 14 of FIG. 5, taken along line 15 of FIG. 5, taken along line 16 of FIG. 5, taken along line 17 of FIG. 5, taken along line 18 of FIG. 5, taken along line 19 of FIG. 6, taken along line 19 of FIG. 6, taken along line 19 of FIG. 7 ... FIG. 11 is a side view illustrating a first magnet and a second magnet of a lens driving device according to one embodiment of the present invention.

[0062] 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.

[0063] 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, 600).

[0064] 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).

[0065] 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).

[0066] 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).

[0067] 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.

[0068] 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'.

[0069] 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.

[0070] 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.

[0071] The base (110) may include a groove (115). The groove (115) may be a 'substrate and repulsive magnet receiving groove'. The substrate (120) may be placed in the groove (115). The repulsive magnet (500, 600) may be placed in the groove (115). The groove (115) may have 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, 600).

[0072] 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).

[0073] 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.

[0074] 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”.

[0075] 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 arranged parallel to the optical axis. A coil (320) and a sensor (330) may be arranged 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 spaced apart from the driving magnet (23100). The substrate (120) may include a printed circuit board. The substrate (120) may include a flexible printed circuit board (FPCB). The substrate (120) may partially overlap the driving magnet (310) in a first direction. The substrate (120) may not overlap the driving magnet (310) in a second direction. The substrate (120) may not overlap the repulsive magnet (500, 600) in the first direction. The substrate (120) may not overlap with the repulsive magnet (500, 600) in the second direction.

[0076] The substrate (120) may include a terminal (121). The terminal (121) may be formed at the lower end of the 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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).

[0081] 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.

[0082] 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).

[0083] 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).

[0084] 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).

[0085] 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”.

[0086] 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).

[0087] 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.

[0088] 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).

[0089] 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.

[0090] 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).

[0091] 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).

[0092] 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 repulsive magnets (500, 600). At least a portion of the coil (320) can overlap the driving magnet (310) or the repulsive magnet (500, 600) in a horizontal direction. The coil (320) may overlap with the driving magnet (310) in the first direction. The coil (320) may not overlap with the driving magnet (310) in the second direction. The coil (320) may partially overlap with the repulsive magnet (500, 600) in the second direction. The coil (320) may not overlap with the repulsive magnet (500, 600) in the first direction. The center of the coil (320) may be located at the same height as the center of the second magnet in the optical axis direction.

[0093] 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 in an internal hole of the coil (320). The sensor (330) may be a Hall sensor. The sensor (330) may be disposed on a side of the fixing unit (100). For example, the sensor (330) may be located on a side of the base (110). In addition, the sensor (330) may not be disposed in the internal hole of the coil (320). Accordingly, the design of the internal hole width of the coil (320) may 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 inner hole or width of the coil (320) can be 0.1 mm to 0.6 mm. Additionally, 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 (330) 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 (330) can be greater than the length in the optical axis direction of the hole inside the coil (320).

[0094] 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).

[0095] 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).

[0096] 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.

[0097] 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) can be placed in the groove (212) of the holder (210). The ball (400) can overlap with the driving magnet (310) in the first direction. The ball (400) can overlap with the repulsive magnet (500, 600) in the first direction. The ball (400) may not overlap with the coil (320) in the first direction. 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). The ball (400) may partially overlap with the driving magnet (310) in the first direction. The ball (400) may not overlap with the driving magnet (310) in the second direction. The ball (400) may overlap with the repulsive magnet (500, 600) in the first direction. The ball (400) may not overlap with the repulsive magnet (500, 600) in the second direction.

[0098] The lens driving device (10) may include a repulsive magnet (500, 600). The repulsive magnet (500, 600) may be placed on a fixing member (100). The repulsive magnet (500, 600) may be fixed to the fixing member (100). The repulsive magnet (500, 600) may be coupled to the fixing member (100). The repulsive magnet (500, 600) may be bonded to the fixing member (100) with an adhesive. The repulsive magnet (500, 600) may be placed on a base (110). The repulsive magnet (500, 600) may be fixed to the base (110). The repulsive magnet (500, 600) may be coupled to the base (110). The repulsive magnet (500, 600) can be bonded to the base (110) with an adhesive. The repulsive magnet (500, 600) can be placed in a groove formed concavely on the side of the base (110).

[0099] The repulsive magnet (500, 600) can urge the driving magnet (310) toward the ball (400). In other words, the repulsive magnet (500, 600) can cause the ball (400) to be pressed between the fixed part (100) and the moving part (200). The repulsive magnet (500, 600) can urge the moving part (200) toward the ball (400). The repulsive magnet (500, 600) can urge the holder (210) toward the ball (400). The repulsive magnet (500, 600) 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, 600) 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, 600) can exert a repulsive force with the spaced driving magnet (310). A repulsive force can be generated between the repulsive magnet (500, 600) and the driving magnet (310). The repulsive magnet (500, 600) can be arranged to generate a repulsive force with the driving magnet (310). The repulsive magnet (500, 600) can repel the driving magnet (310). The repulsive magnet (500, 600) 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, 600) can pressurize the driving magnet (310) so that the ball (400) is pressed between the fixed part (100) and the moving part (200).

[0100] The repulsive magnet (500, 600) may be a four-pole magnet. The repulsive magnet (500, 600) may include a four-pole magnetizing magnet. The repulsive magnet (500, 600) may include a lower magnet portion (510, 610) including a north pole and a south pole. The repulsive magnet (500, 600) may include an upper magnet portion (520, 620) including a south pole and a north pole. The repulsive magnet (500, 600) may include a neutral portion (530, 630) disposed between the lower magnet portion (510, 610) and the upper magnet portion (520, 620).

[0101] The upper magnet portion (520, 620) may be placed on the lower magnet portion (510, 610). The lower magnet portion (510, 610) and the upper magnet portion (520, 620) may be placed in the direction of the optical axis. The lower magnet portion (510, 610) and the upper magnet portion (520, 620) may be spaced apart from each other in the direction of the optical axis. A neutral portion (530, 630) may be placed between the lower magnet portion (510, 610) and the upper magnet portion (520, 620).

[0102] The N pole of the lower magnet portion (510, 610) of the repulsive magnet (500, 600) 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, 620) of the repulsive magnet (500, 600) may face the S pole of the upper magnet portion (312) of the driving magnet (310). That is, the repulsive magnet (500, 600) and the driving magnet (310) may be arranged so that the same poles face each other.

[0103] Hereinafter, the driving magnet (310) is described as the first magnet (310), and the repulsive magnets (500, 600) are described as the second magnet (500) and the third magnet (600).

[0104] The lens driving device (10) according to the embodiment may include a first magnet (310) and a second magnet (500).

[0105] The first magnet (310) may include a first magnet portion (311) and a second magnet portion (312). The first magnet portion (311) may be a lower magnet portion of the first magnet (310), and the second magnet portion (312) may be an upper magnet portion of the first magnet (310). The second magnet (500) may include a third magnet portion (510) and a fourth magnet portion (520). The third magnet portion (510) may be a lower magnet portion of the second magnet (500), and the fourth magnet portion (520) may be an upper magnet portion of the second magnet (500).

[0106] Referring to FIGS. 9 to 11, when the center (C1) of the first magnet (310) and the center (C2) of the second magnet (500) are positioned at the same height in the optical axis direction, the first length (l1) of the third magnet portion (510) is less than or equal to the second length (l2) of the third magnet portion (510), the first length (l1) may be the optical axis direction length of the third magnet portion (510) that overlaps the first magnet portion (311) in the first direction, and the second length (l2) may be the optical axis direction length of the third magnet portion (510) that does not overlap the first magnet portion (311) in the first direction.

[0107] The center (C1) of the first magnet (310) may refer to the center of the length of the first magnet (310) in the optical axis direction when based on the optical axis direction. The center (C2) of the second magnet (500) may refer to the center of the length of the second magnet (500) in the optical axis direction when based on the optical axis direction. The moving part (200) may move along the optical axis direction according to the driving of the lens driving device (10), and the first magnet (310) arranged on the moving part (200) may also move along the optical axis direction. The second magnet (500) may be arranged on the fixing part (100) of the lens driving device (10) and may be fixed regardless of the driving of the lens driving device (10). When the first magnet (310) moves along the optical axis direction, the center (C1) of the first magnet (310) and the center (C2) of the second magnet (500) may be positioned at the same height along the optical axis direction. In this case, the center (C1) of the first magnet (310) and the center (C2) of the second magnet (500) may be positioned on the same plane in a direction perpendicular to the optical axis direction.

[0108] The first length (l1) of the third magnet portion (510) may refer to the length in the optical axis direction of the third magnet portion (510) that overlaps the first magnet portion (311) in the first direction when the center (C1) of the first magnet (310) and the center (C2) of the second magnet (500) are positioned at the same height in the optical axis direction. The second length (l2) of the third magnet portion (510) may refer to the length in the optical axis direction of the third magnet portion (510) that does not overlap the first magnet portion (311) in the first direction when the center (C1) of the first magnet (310) and the center (C2) of the second magnet (500) are positioned at the same height in the optical axis direction. In this case, the first length (l1) of the third magnet portion (510) may be less than or equal to the second length (l2). When the first length (l1) of the third magnet portion (510) is less than or equal to the second length (l2) of the third magnet portion (510), the direction of the repulsive force in the optical axis direction that the second magnet (500) applies to the first magnet (310) may be opposite to the driving direction of the first magnet (310). When the direction of the repulsive force in the optical axis direction that the second magnet (500) applies to the first magnet (310) is opposite to the driving direction of the first magnet (310), the direction of the force applied to the moving portion (200) in the driving direction may not diverge but converge, thereby increasing the driving stability of the moving portion (200). In addition, when the first length (l1) of the third magnet portion (510) is less than or equal to the second length (l2) of the third magnet portion (510), the magnitude of the repulsive force in the optical axis direction that the second magnet (500) applies to the first magnet (310) may decrease. When the magnitude of the repulsive force in the optical axis direction that the second magnet (500) applies to the first magnet (310) decreases, the intensity of the current required for driving decreases, thereby increasing the driving efficiency of the lens driving device (10). In addition, the driving power of the lens driving device (10) may be increased by reducing the magnitude of the force applied in the moving direction of the moving portion (200). The second length (l2) of the third magnet portion (510) is 1 to 1 times the first length (l1).It can be 5 times. Specifically, the first length (l1) of the third magnet portion (510) can be 0.71 mm to 0.79 mm, and the second length (l2) of the third magnet portion (510) can be 0.81 mm to 0.89 mm. When the center (C2) of the second magnet (500) is positioned higher than the center (C1) of the first magnet (310), the first length (l1) of the third magnet portion (510) can be greater than the second length (l2). In addition, when the center (C2) of the second magnet (500) is positioned higher than the center (C1) of the first magnet (310), the first magnet portion (311) and the third magnet portion (510) can overlap in the first direction.

[0109] In addition, when the center (C1) of the first magnet (310) and the center (C2) of the second magnet (500) are positioned at the same height in the optical axis direction, the third length (l3) of the fourth magnet portion (520) may be smaller than or equal to the fourth length (l4), and the third length (l3) may be the optical axis direction length of the fourth magnet portion (520) that overlaps the second magnet portion (312) in the first direction, and the fourth length (l4) may be the optical axis direction length of the fourth magnet portion (520) that does not overlap the second magnet portion (312) in the first direction. Due to this, the direction of the repulsive force in the optical axis direction that the second magnet (500) applies to the first magnet (310) becomes opposite to the driving direction of the first magnet (310), so that the direction of the force applied to the moving part (200) in the driving direction does not diverge but converges, thereby increasing the driving stability of the moving part (200). In addition, the magnitude of the repulsive force in the optical axis direction that the second magnet (500) applies to the first magnet (310) decreases, so that the intensity of the current required for driving decreases, thereby increasing the driving efficiency of the lens driving device (10). In addition, the driving power of the lens driving device (10) can be increased by reducing the magnitude of the force applied in the moving direction of the moving part (200).

[0110] The lens driving device (10) may include a third magnet (600).

[0111] The third magnet (600) is spaced apart from the first magnet (310) in a first direction so that a repulsive force is applied thereto, and can be spaced apart from the second magnet (500) in a second direction. The third magnet (600) can be placed at the same height in the optical axis direction as the second magnet (500). The third magnet (600) can include a fifth magnet portion (610) and a sixth magnet portion (620). The fifth magnet portion (610) can be a lower magnet portion of the third magnet (600), and the sixth magnet portion (620) can be an upper magnet portion of the third magnet (600). The optical axis direction length of the fifth magnet portion (610) that overlaps the first magnet portion (311) in the first direction may be less than or equal to the optical axis direction length of the fifth magnet portion (610) that does not overlap the first magnet portion (311) in the first direction. In addition, the optical axis direction length of the sixth magnet portion (620) that overlaps the second magnet portion (312) in the first direction may be less than or equal to the optical axis direction length of the sixth magnet portion (620) that does not overlap the second magnet portion (312) of the sixth magnet portion (620) in the first direction. Due to this, the direction of the repulsive force in the optical axis direction that the second magnet (500) applies to the first magnet (310) becomes opposite to the driving direction of the first magnet (310), so that the direction of the force applied to the moving part (200) in the driving direction does not diverge but converges, thereby increasing the driving stability of the moving part (200). In addition, the magnitude of the repulsive force in the optical axis direction that the second magnet (500) applies to the first magnet (310) decreases, so that the intensity of the current required for driving decreases, thereby increasing the driving efficiency of the lens driving device (10). In addition, the driving power of the lens driving device (10) can be increased by reducing the magnitude of the force applied in the moving direction of the moving part (200).

[0112] The first magnet portion (311) and the second magnet portion (312) are spaced apart in the optical axis direction, and the first magnet (310) may include a first neutral portion (313) arranged between the first magnet portion (311) and the second magnet portion (312). The first direction width of the first neutral portion (313) may be the same as the first direction widths of the first magnet portion (311) and the second magnet portion (312). The second direction width of the first neutral portion (313) may be the same as the second direction widths of the first magnet portion (311) and the second magnet portion (312).

[0113] The third magnet portion (510) and the fourth magnet portion (520) are spaced apart in the optical axis direction, and the second magnet (500) may include a second neutral portion (530) arranged between the third magnet portion (510) and the fourth magnet portion (520). The first direction width of the second neutral portion (530) may be the same as the first direction widths of the third magnet portion (510) and the fourth magnet portion (520). The second direction width of the second neutral portion (530) may be the same as the second direction widths of the third magnet portion (510) and the fourth magnet portion (520). The second neutral portion (530) may partially overlap with the first magnet portion (311), the second magnet portion (312), and the first neutral portion (313) in the first direction. The second neutral part (530) may be arranged so that the first magnet part (311), the second magnet part (312), and the first neutral part (313) all partially overlap in the first direction when the center (C1) of the first magnet (310) and the center (C2) of the second magnet (500) are located at the same height in the optical axis direction.

[0114] The second direction distance (d2) between the outer surfaces of the second magnet (500) and the third magnet (600) may be greater than the second direction length (d1) of the first magnet. The second direction distance (d2) between the outer surfaces of the second magnet (500) and the third magnet (600) may be greater than the second direction length (d1) of the first magnet, so that a part of the outer side of the second magnet (500) and the third magnet (600) in the second direction may not overlap with the first magnet (310) in the first direction.

[0115] FIGS. 12 to 14 are tables showing the magnitude of the force acting on the first magnet according to the length relationship between the first region and the second region of the third magnet portion. The rows of the tables of FIGS. 12 to 14 represent the movement distance (D) (unit: ㎛) of the first magnet in the optical axis direction according to the configuration of the lens driving device. The movement distance of the first magnet in the optical axis direction may be -275 ㎛ to 275 ㎛ based on the initial state. The columns of the tables of FIGS. 12 to 14 represent the force (unit: mN) that the first magnet receives from the second magnet and the third magnet. The first column, the second column, and the third column may represent the x-axis direction force (Fx), the y-axis direction force (Fy), and the z-axis direction force (Fz) that the first magnet receives from the second magnet and the third magnet, respectively. The optical axis direction movement of the first magnet according to the driving of the lens driving device can occur by the force in the z-axis direction.

[0116] Fig. 12 shows the magnitude of the force acting on the first magnet when the optical axis direction length of the first region of the third magnet part is 0.75 mm and the optical axis direction length of the second region of the third magnet part is 0 mm. Fig. 13 shows the magnitude of the force acting on the first magnet when the optical axis direction length of the first region of the third magnet part is 0.75 mm and the optical axis direction length of the second region of the third magnet part is 0.4 mm. Fig. 14 shows the magnitude of the force acting on the first magnet when the optical axis direction length of the first region of the third magnet part is 0.75 mm and the optical axis direction length of the second region of the third magnet part is 0.85 mm.

[0117] Referring to FIGS. 12 to 14, when the optical axis direction length of the first region of the third magnet portion is smaller than the optical axis direction length of the second region of the third magnet portion, the direction of the force acting on the first magnet may be opposite to the movement direction of the first magnet. Referring to the third column of the tables of FIGS. 12 and 13, it can be confirmed that the signs of the optical axis direction movement distance (D) of the first magnet and the z-axis direction force (Fz) acting on the first magnet are the same. On the other hand, referring to the third column of the table of FIG. 14, it can be confirmed that the optical axis direction movement distance (D) of the first magnet and the z-axis direction force (Fz) acting on the first magnet are opposite. When the direction of movement in the optical axis direction of the first magnet and the direction of the z-axis direction force (Fz) acting on the first magnet are opposite, the direction of the force acting in the driving direction on the moving part (200) does not diverge but converges, thereby increasing the driving stability of the moving part (200). In addition, referring to FIGS. 12 to 14, when the optical axis direction length of the first region of the third magnet part is smaller than the optical axis direction length of the second region of the third magnet part, the magnitude of the z-axis direction force (Fz) acting on the first magnet may be smaller compared to the case where the optical axis direction length of the first region of the third magnet part is larger than the optical axis direction length of the second region of the third magnet part. Accordingly, when the optical axis direction length of the first region of the third magnet part is smaller than the optical axis direction length of the second region of the third magnet part, the magnitude of the repulsive force in the optical axis direction that the second magnet applies to the first magnet decreases, thereby decreasing the intensity of the current required for driving, thereby increasing the driving efficiency of the lens driving device. In addition, the driving force of the lens driving device can be increased by reducing the magnitude of the force applied in the direction of movement of the moving part.

[0118] Fig. 15 is a front view showing the first to sixth magnets of a lens driving device (11) according to another embodiment.

[0119] Referring to FIG. 15, the lens driving device (11) may include first to sixth magnets (710, 720, 730, 740, 750, 760).

[0120] The first to sixth magnets (710, 720, 730, 740, 750, 760) may be separate, independent magnetic bodies.

[0121] The first magnet (710) and the second magnet (720) may be driving magnets that move the moving part. The first magnet (710) and the second magnet (720) may be spaced apart from each other in the optical axis direction. The first magnet (710) and the second magnet (720) may overlap each other in the optical axis direction. The first magnet (710) and the second magnet (720) may have the same length in the optical axis direction, the same length in the first direction, and the same length in the second direction, respectively. A first spacer (810) may be placed between the first magnet (710) and the second magnet (720). The first spacer (810) may be a neutral part without magnetism. The first spacer (810) may be in contact with the first magnet (710) and the second magnet (720). The first spacer (810) may overlap the first magnet (710) and the second magnet (720) in the optical axis direction. The second direction length of the first spacer (810) may be the same as the second direction lengths of the first magnet (710) and the second magnet (720). The first magnet (710) and the second magnet (720) may be arranged so that the directions of their positive poles are opposite to each other. The directions of the positive poles of the first magnet (710) and the second magnet (720) may be opposite to each other with respect to the first direction.

[0122] The third magnet (730), the fourth magnet (740), the fifth magnet (750), and the sixth magnet (760) may be repulsive magnets that exert a repulsive force on the driving magnet. The third magnet (730) and the fourth magnet (740) may be spaced apart from each other in the optical axis direction. The third magnet (730) and the fourth magnet (740) may overlap each other in the optical axis direction. The third magnet (730) and the fourth magnet (740) may have the same length in the optical axis direction, the same length in the first direction, and the same length in the second direction, respectively. A second spacer (820) may be placed between the third magnet (730) and the fourth magnet (740). The second spacer (820) may be a neutral part without magnetism. The second spacer (820) can be in contact with the third magnet (730) and the fourth magnet (740). The second spacer (820) can overlap with the third magnet (730) and the fourth magnet (740) in the optical axis direction. The second direction length of the second spacer (820) can be the same as the second direction lengths of the third magnet (730) and the fourth magnet (740). The third magnet (730) and the fourth magnet (740) can be arranged so that the directions of their positive poles are opposite to each other. The directions of the positive poles of the third magnet (730) and the fourth magnet (740) can be opposite to each other with respect to the first direction. The fifth magnet (750) and the sixth magnet (760) can be arranged to be spaced apart from each other in the optical axis direction. The fifth magnet (750) and the sixth magnet (760) may overlap in the optical axis direction. The fifth magnet (750) and the sixth magnet (760) may have the same length in the optical axis direction, the same length in the first direction, and the same length in the second direction, respectively. The fifth magnet (750) and the sixth magnet (760) may be arranged to be spaced apart from the third magnet (730) and the fourth magnet (740) in the second direction, respectively. The fifth magnet (750) may be arranged to be spaced apart from the third magnet (730) in the second direction. The sixth magnet (760) may be arranged to be spaced apart from the fourth magnet (740) in the second direction.A third spacer (830) may be placed between the fifth magnet (750) and the sixth magnet (760). The third spacer (830) may be a neutral part without magnetism. The third spacer (830) may be in contact with the fifth magnet (750) and the sixth magnet (760). The third spacer (830) may overlap the fifth magnet (750) and the sixth magnet (760) in the optical axis direction. The second direction length of the third spacer (830) may be the same as the second direction lengths of the fifth magnet (750) and the sixth magnet (760). The fifth magnet (750) and the sixth magnet (760) may be placed such that the directions of their positive poles are opposite to each other. The directions of the positive poles of the fifth magnet (750) and the sixth magnet (760) may be opposite to each other with respect to the first direction.

[0123] The optical axis direction length of the portion of the third magnet (730) that overlaps with the first magnet (710) in the first direction may be less than or equal to the optical axis direction length of the portion of the third magnet (730) that does not overlap with the first magnet (710) in the first direction. The optical axis direction length of the portion of the fourth magnet (740) that overlaps with the second magnet (720) in the first direction may be less than or equal to the optical axis direction length of the portion of the fourth magnet (740) that does not overlap with the second magnet (720) in the first direction. The optical axis direction length of the portion of the fifth magnet (750) that overlaps with the first magnet (710) in the first direction may be less than or equal to the optical axis direction length of the portion of the fifth magnet (750) that does not overlap with the first magnet (710) in the first direction. The optical axis direction length of the portion of the sixth magnet (760) that overlaps with the second magnet (720) in the first direction may be less than or equal to the optical axis direction length of the portion of the sixth magnet (760) that does not overlap with the second magnet (720) in the first direction.

[0124] Fig. 16 is an exploded perspective view of a camera device according to one embodiment of the present invention.

[0125] The camera device (10A) may include a camera module.

[0126] 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).

[0127] 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).

[0128] 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.

[0129] 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 that is mounted on the printed circuit board (50).

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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).

[0134] 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.

[0135] Hereinafter, an optical device according to one embodiment of the present invention will be described with reference to the drawings.

[0136] Fig. 17 is a perspective view of an optical device according to one embodiment of the present invention. Fig. 18 is a perspective view of an optical device according to a modified example.

[0137] 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.

[0138] 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.

[0139] 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; and Including a second magnet spaced apart from the first magnet in the first direction and exerting a repulsive force; The above first magnet includes a first magnet portion and a second magnet portion, The above second magnet includes a third magnet section and a fourth magnet section, When the center of the first magnet and the center of the second magnet are located at the same height in the optical axis direction, the first length of the third magnet portion is less than or equal to the second length of the third magnet portion, A lens driving device in which the first length is the optical axis direction length of the third magnet portion that overlaps the first magnet portion in the first direction, and the second length is the optical axis direction length of the third magnet portion that does not overlap the first magnet portion in the first direction.

2. In paragraph 1, It includes a third magnet spaced apart from the first magnet in the first direction and exerting a repulsive force, and a third magnet spaced apart from the second magnet in the second direction. A lens driving device in which the second direction is a direction perpendicular to the optical axis direction and the first direction.

3. In paragraph 1, The third length of the fourth magnet section is less than or equal to the fourth length, A lens driving device in which the third length is the optical axis direction length of the fourth magnet portion that overlaps the second magnet portion in the first direction, and the fourth length is the optical axis direction length of the fourth magnet portion that does not overlap the second magnet portion in the first direction.

4. In paragraph 2, The first magnet portion and the second magnet portion are spaced apart in the optical axis direction, The first magnet includes a first neutral portion disposed between the first magnet portion and the second magnet portion, The third magnet portion and the fourth magnet portion are spaced apart in the optical axis direction, A lens driving device in which the second magnet includes a second neutral part disposed between the third magnet part and the fourth magnet part.

5. In paragraph 4, A lens driving device in which the second neutral part partially overlaps the first magnet part, the second magnet part, and the first neutral part in the first direction.

6. In paragraph 2, A lens driving device wherein the distance between the outer surfaces of the second magnet and the third magnet in the second direction is greater than the length of the first magnet in the second direction.

7. In paragraph 2, The above coil is placed between the second magnet and the third magnet, A lens driving device in which the coil partially overlaps the second magnet and the third magnet in the second direction and does not overlap in the first direction.

8. In paragraph 7, The above driving unit includes a substrate on which the coil is arranged, A lens driving device in which the second magnet and the third magnet do not overlap with the substrate in the first direction and the second direction.

9. In paragraph 2, It includes a ball placed between the above moving part and the above fixed part, The above ball is a lens driving device that overlaps the second magnet and the third magnet in the first direction.

10. In paragraph 1, A lens driving device wherein the second length is 1 to 1.5 times the first length.

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