Lens driving device, camera device, and optical instrument

Abstract

The present embodiment relates to a lens driving device comprising: a housing; a bobbin arranged in the housing; a magnet arranged in the housing; a first coil moving the bobbin in the optical axis direction; a second coil moving the housing in a first direction perpendicular to the optical axis direction, wherein the magnet interacts with the first coil and the second coil, the second coil includes a first unit coil and a second unit coil, the magnet includes a first magnet interacting with the first unit coil and a second magnet interacting with the second unit coil, and when a distance between the first unit coil and the first magnet increases, a distance between the second unit coil and the second magnet decreases.

Description

Lens actuators, camera devices and optical instruments

[0001] The present embodiment relates 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 are equipped with a shake correction function to prevent the focus from shaking due to the user's hand shaking.

[0004] However, in conventional camera devices, there is a problem in that the electromagnetic force between the shake correction coil and the shake correction magnet becomes weaker as the distance between the shake correction coil and the shake correction magnet increases due to the operation of the shake correction function.

[0005] (Patent Document 1) KR 10-2279920 B1

[0006] The present embodiment aims to provide a lens driving device in which the distance between the coil and the magnet on one side becomes longer by arranging the driving unit for image stabilization on both sides, and the distance between the coil and the magnet on the other side becomes shorter, so that the electromagnetic force between the coil and the magnet is maintained at a preset value or higher throughout the entire image stabilization driving section.

[0007] A lens driving device according to the present embodiment comprises: a housing; a bobbin disposed within the housing; a magnet disposed in the housing; a first coil moving the bobbin in an optical axis direction; and a second coil moving the housing in a first direction perpendicular to the optical axis direction, wherein the magnet interacts with the first coil and the second coil, the second coil includes a first unit coil and a second unit coil, and the magnet includes a first magnet interacting with the first unit coil and a second magnet interacting with the second unit coil, and when the first unit coil and the first magnet move apart, the second unit coil and the second magnet can come closer together.

[0008] The first magnet and the second magnet may be arranged between the first unit coil and the second unit coil in the first direction.

[0009] The first unit coil may be arranged on the outside of the first magnet so as to overlap with the first magnet in the first direction, and the second unit coil may be arranged on the outside of the second magnet so as to overlap with the second magnet in the first direction.

[0010] The lens actuator includes a third coil that moves the housing in a second direction perpendicular to the optical axis direction and the first direction, and the magnet can interact with the first coil, the second coil, and the third coil.

[0011] The third coil includes a third unit coil and a fourth unit coil, and the magnet includes a third magnet interacting with the third unit coil and a fourth magnet interacting with the fourth unit coil, and when the third unit coil and the third magnet move apart, the fourth unit coil and the fourth magnet can come closer.

[0012] The third magnet and the fourth magnet can be arranged between the third unit coil and the fourth unit coil in the second direction.

[0013] The distance in the first direction between the first coil and the magnet can be maintained constant.

[0014] The above first magnet may include an inner surface facing the first coil and an outer surface facing the second coil.

[0015] The above first magnet may be a two-pole magnet in which the inner surface is formed with one of the N pole and the S pole and the outer surface is formed with the other of the N pole and the S pole.

[0016] The lens actuator includes a base; and a support member supporting the housing relative to the base, wherein the housing can be placed on the base.

[0017] The lens actuator may include an upper elastic member coupled to the upper surface of the housing and the bobbin; and a lower elastic member coupled to the lower surface of the housing and the bobbin.

[0018] The lens actuator may include a base on which the housing is placed; a ball placed between the base and the housing; and an elastic member that presses the ball between the base and the housing.

[0019] A portion of the above housing may be disposed between the first magnet and the first unit coil.

[0020] A camera device according to the present embodiment may include a printed circuit board; an image sensor disposed on the printed circuit board; the lens driving device disposed on the printed circuit board; and a lens coupled to the lens driving device.

[0021] An optical device according to the present embodiment may include a main body; the camera device disposed in the main body; and a display disposed in the main body and outputting at least one of an image and a video captured by the camera device.

[0022] In this embodiment, since the shake correction drive units are arranged on both sides, when the distance between the coil and the magnet on one side increases, the distance between the coil and the magnet on the other side decreases, so that the electromagnetic force between the coil and the magnet can be maintained above a preset value throughout the entire shake correction drive. In other words, the problem of the driving force weakening as the shake correction drive progresses in the conventional structure can be solved.

[0023] In addition, the problem of the driving force becoming weaker as the shake correction drive is performed in both the x-axis direction and the y-axis direction can be solved through this embodiment.

[0024] Fig. 1 is a perspective view of a lens driving device according to the present embodiment.

[0025] Figure 2 is a cross-sectional view taken along line AA of Figure 1.

[0026] Figure 3 is a cross-sectional view taken along line BB of Figure 1.

[0027] Figure 4 is a cross-sectional view taken along CC of Figure 1.

[0028] Fig. 5 is a cross-sectional view of the lens driving device according to the present embodiment, cut in a direction perpendicular to the optical axis and viewed from above.

[0029] Fig. 6 is an exploded perspective view of a lens driving device according to the present embodiment.

[0030] Figure 7 is an exploded perspective view viewed from a different direction than Figure 6.

[0031] Fig. 8 is a perspective view showing a fixing part and related configuration of a lens driving device according to the present embodiment.

[0032] Fig. 9 is a perspective view showing a moving part and related components according to the present embodiment.

[0033] Fig. 10 is a perspective view showing the AF moving part and related configuration according to the present embodiment.

[0034] Fig. 11 is a perspective view showing an OIS moving part and related components according to the present embodiment.

[0035] Figure 12 is a plan view of Figure 9 viewed from above.

[0036] Fig. 13 is a bottom view of Fig. 9.

[0037] Fig. 14 is a bottom perspective view of Fig. 13.

[0038] Fig. 15 is a perspective view of a lens driving device according to the present embodiment with the cover omitted.

[0039] Figure 16 (a) is a conceptual diagram of an OIS driving unit of a lens driving device according to a comparative example, and (b) is a graph showing the strength of the electromagnetic force between a coil and a magnet according to the distance between the coil and the magnet.

[0040] Fig. 17 (a) is a conceptual diagram of an OIS driving unit of a lens driving device according to the present embodiment, and (b) is a graph showing the strength of the electromagnetic force between a coil and a magnet according to the distance between the coil and the magnet on one side.

[0041] Figure 18 (a) is a cross-sectional view showing a state in which the moving part has moved to the left, and (b) is a cross-sectional view showing a state in which the moving part has moved to the right.

[0042] Fig. 19 is a drawing for explaining the AF operation of the lens driving device according to the present embodiment.

[0043] Fig. 20 is a drawing for explaining OIS operation of a lens driving device according to the present embodiment.

[0044] Fig. 21 is an exploded perspective view of a camera device according to the present embodiment.

[0045] Fig. 22 is a perspective view of an optical device according to the present embodiment.

[0046] Figure 23 is a perspective view of an optical device according to a modified example.

[0047] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and are not intended to limit the nature, order, or sequence of the components.

[0053] 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 'connected', 'coupled', or 'connected' directly 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.

[0054] 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," the meaning may include not only the upward direction but also the downward direction based on one component.

[0055] 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 (see OA in Fig. 19).

[0056] 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'.

[0057] Hereinafter, one of the 'x-axis direction' and the 'y-axis direction' may be referred to as the 'first direction' and the other as the 'second direction'. Alternatively, hereafter, one of the 'x-axis direction' and the 'y-axis direction' may be referred to as the 'first axis direction' and the other as the 'second axis direction'.

[0058] 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 optical axis direction 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.

[0059] The term "optical image stabilization (OIS) function" used below is defined as a function that moves or tilts the lens in a direction perpendicular to the optical axis to compensate for hand shake in order to prevent images or videos from shaking due to the user's hand shake. In addition, "closed-loop auto focus (CLAF) control" is defined as a function that detects the position of the lens with respect to the image sensor and provides real-time feedback control of the lens position to improve the accuracy of hand shake correction.

[0060] Hereinafter, one of the “AF coil (420)”, the “OIS-x coil (430)”, and the “OIS-y coil (440)” may be referred to as the “first coil”, the other may be referred to as the “second coil”, and the other may be referred to as the “third coil”.

[0061] Hereinafter, one of the “upper elastic member (510)” and the “lower elastic member (520)” may be referred to as the “first elastic member” and the other may be referred to as the “second elastic member”.

[0062]

[0063] Below, the configuration of the lens driving device according to the present embodiment is described with reference to the drawings.

[0064] Fig. 1 is a perspective view of a lens driving device according to the present embodiment. 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 view taken along line CC of Fig. 1. Fig. 5 is a cross-sectional view taken along line BB of Fig. 1, and is a cross-sectional view taken along line BB of Fig. 1. Fig. 6 is an exploded perspective view of a lens driving device according to the present embodiment when viewed from above in a direction perpendicular to the optical axis. Fig. 7 is an exploded perspective view taken along a different direction from Fig. 6. Fig. 8 is a perspective view illustrating a fixed portion and related components of a lens driving device according to the present embodiment. Fig. 9 is a perspective view illustrating a moving portion and related components according to the present embodiment. Fig. 10 is a perspective view illustrating an AF moving portion and related components according to the present embodiment. Fig. 11 is a perspective view illustrating an OIS moving portion and related components according to the present embodiment. Fig. 12 is a plan view taken along line 9 when viewed from above. Fig. 13 is a bottom view of Fig. 9 as seen from below. Fig. 14 is a bottom perspective view of Fig. 13. Fig. 15 is a perspective view of a lens drive device according to the present embodiment with the cover omitted. Fig. 16 (a) is a conceptual diagram of an OIS drive unit of a lens drive device according to a comparative example, and (b) is a graph showing the intensity of the electromagnetic force between a coil and a magnet according to the distance between the coil and the magnet. Fig. 17 (a) is a conceptual diagram of an OIS drive unit of a lens drive device according to the present embodiment, and (b) is a graph showing the intensity of the electromagnetic force between a coil and a magnet according to the distance between one side of the coil and the magnet. Fig. 18 (a) is a cross-sectional view showing a state in which a moving part has moved to the left, and (b) is a cross-sectional view showing a state in which a moving part has moved to the right.

[0065] 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 OIS module.

[0066] The lens actuator (10) may include a fixed part (100). The fixed part (100) may be a part that is relatively fixed when the moving part moves. The moving part may move relative to the fixed part (100).

[0067] The lens actuator (10) may include a base (110). The fixing member (100) may include the base (110). The base (110) may be positioned below the bobbin (210). The base (110) may be positioned below the housing (310). The base (110) may be coupled to the cover (130). The base (110) may be positioned below the substrate (120).

[0068] The lens actuator (10) may include a substrate (120). The fixing member (100) may include the substrate (120). The substrate (120) may be disposed on the base (110). The substrate (120) may be disposed on the base (110). Alternatively, the substrate (120) may be disposed on the cover (130). The substrate (120) may be disposed on the side plate (132) of the cover (130). Coils (420, 430, 440) may be disposed on the substrate (120). An OIS sensor (450) may be disposed on the substrate (120). The substrate (120) may be a circuit board. The substrate (120) may be a printed circuit board. The substrate (120) may be an FPCB.

[0069] The substrate (120) may be spaced apart from the cover (130). Alternatively, the substrate (120) may include a bottom substrate disposed on the base (110) and a side substrate disposed on the inner surface of the side plate (132) of the cover (130). The side substrate may extend upward from the bottom substrate. The coils (420, 430, 440) may be disposed on the side substrate.

[0070] The substrate (120) may be electrically connected to the coils (420, 430, 440). The substrate (120) may be electrically connected to the OIS sensor (450). The substrate (120) may be coupled to the support member (530). The substrate (120) may be electrically connected to the support member (530). The substrate (120) may be electrically connected to the upper elastic member (510).

[0071] The lens actuator (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 a bobbin (210) therein. The cover (130) may accommodate a housing (310) therein. The cover (130) may be a shield member. The cover (130) may be a shield can.

[0072] The cover (130) may include a top plate (131). The top plate (131) may be disposed on the moving part. The upward movement of the moving part may be limited by the moving part contacting the top plate (131). The upward movement of the bobbin (210) may be limited by the bobbin (210) contacting the top plate (131). The upward movement of the housing (310) may be limited by the housing (310) contacting the top plate (131).

[0073] 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 portion 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 (132). The side plate (132) may include four side plates (132). 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.

[0074] The lens driving device (10) may include a moving part. The moving part may be a moving body. The moving part may be arranged on the fixed part (100). The moving part may be arranged within the fixed part (100). The moving part may be arranged on the fixed part (100). The moving part may be movably arranged on the fixed part (100). The moving part may be moved relative to the fixed part (100) by the driving part. The moving part may be moved when the AF is driven. The moving part may be moved when the OIS is driven. A lens may be coupled to the moving part.

[0075] The lens driving device (10) may include an AF moving unit. The AF moving unit may be an AF moving body. The AF moving unit may be arranged on the fixed unit (100). The AF moving unit may be arranged within the fixed unit (100). The AF moving unit may be arranged on the fixed unit (100). The AF moving unit may be arranged within the OIS moving unit. The AF moving unit may be arranged to be movable on the fixed unit (100). The AF moving unit may move in the optical axis direction with respect to the fixed unit (100) by the AF driving unit. The AF moving unit may move during AF driving.

[0076] The lens actuator (10) may include a bobbin (210). The AF moving unit may include the bobbin (210). The bobbin (210) may be an "AF carrier." The bobbin (210) may be an "AF holder." The bobbin (210) may be placed within the base (110). The bobbin (210) may be placed on the base (110). The bobbin (210) may be placed within the cover (130). The bobbin (210) may be placed within the housing (310). The bobbin (210) may be placed so as to be movable in the optical axis direction.

[0077] The bobbin (210) may include a protrusion (211). The protrusion (211) may be an upper stopper. The protrusion (211) may be formed on the upper surface of the bobbin (210). The protrusion (211) may protrude from the upper surface of the bobbin (210). The protrusion (211) may overlap with the upper plate (131) of the cover (130) in the optical axis direction. When the bobbin (210) moves upward, the protrusion (211) of the bobbin (210) may come into contact with the upper plate (131) of the cover (130).

[0078] The bobbin (210) may include a protrusion (212). The protrusion (121) may be a damper contact protrusion. The protrusion (212) may be formed on the upper surface of the bobbin (210). The protrusion (212) may protrude from the upper surface of the bobbin (210). A damper may be arranged on the protrusion (212).

[0079] The damper may be disposed on the bobbin (210). The damper may be disposed on the upper elastic member (510). The damper may connect the bobbin (210) and the upper elastic member (510). The damper may directly connect the bobbin (210) and the upper elastic member (510). The damper may contact the protrusion (212) of the bobbin (210). The damper may contact the first connecting portion (513) of the upper elastic member (510). The damper may connect the protrusion (212) of the bobbin (210) and the first connecting portion (513) of the upper elastic member (510). The damper may directly connect the protrusion (212) of the bobbin (210) and the first connecting portion (513) of the upper elastic member (510).

[0080] Hereinafter, one of the projections (211) and (212) of the bobbin (210) may be referred to as the “first projection” and the other as the “second projection”.

[0081] The lens driving device (10) may include an OIS moving unit. The OIS moving unit may be an OIS moving body. The OIS moving unit may be disposed on a fixed unit (100). The OIS moving unit may be disposed within the fixed unit (100). The OIS moving unit may be disposed on the fixed unit (100). The OIS moving unit may be disposed between the AF moving unit and the fixed unit (100). The OIS moving unit may be disposed to be movable. The OIS moving unit may move in a direction perpendicular to the optical axis with respect to the fixed unit (100) by the OIS driving unit. The OIS moving unit may move when the OIS is driven. The OIS moving unit may move in the x-axis direction by the OIS-x driving unit. The OIS moving unit may move in the y-axis direction by the OIS-y driving unit.

[0082] The lens actuator (10) may include a housing (310). The OIS moving unit may include the housing (310). The housing (310) may be an "OIS carrier." The housing (310) may be an "OIS holder." The housing (310) may be placed on the base (110). The housing (310) may be placed on the base (110). The housing (310) may be placed between the cover (130) and the bobbin (210). The housing (310) may be placed on the outside of the bobbin (210). The housing (310) may be placed inside the cover (130). The housing (310) may be placed between the base (110) and the cover (130).

[0083] A portion of the housing (310) may be placed between the first magnet (411) and the first unit coil (431). A portion of the housing (310) may be placed on the outer surface of the first magnet (411).

[0084] The housing (310) may include a protrusion (311). The protrusion (311) may be an upper stopper. The protrusion (311) may be formed on the upper surface of the housing (310). The protrusion (311) may protrude from the upper surface of the housing (310). The protrusion (311) may overlap with the upper plate (131) of the cover (130) in the optical axis direction. When the housing (310) moves upward due to an external impact, the protrusion (311) of the housing (310) may come into contact with the upper plate (131) of the cover (130).

[0085] The lens driving device (10) may include a driving unit. The driving unit may move the moving unit relative to the fixed unit (100). The driving unit may include an AF driving unit. The driving unit may include an OIS driving unit. The driving unit may include an OIS-x driving unit. The driving unit may include an OIS-y driving unit. The driving unit may include a coil and a magnet.

[0086] The lens driving device (10) may include an AF driving unit. The AF driving unit may move the AF moving unit in the optical axis direction. The AF driving unit may move the bobbin (210) in the optical axis direction. The AF driving unit may move the bobbin (210) in the optical axis direction through electromagnetic force. The AF driving unit may include a coil and a magnet.

[0087] The lens driving device (10) may include a magnet (410) and an AF coil (420) that move the bobbin (210) in the optical axis direction.

[0088] The lens driving device (10) may include an OIS driving unit. The OIS driving unit may move the OIS moving unit in a direction perpendicular to the optical axis. The OIS driving unit may move the housing (310) in a direction perpendicular to the optical axis.

[0089] The lens driving device (10) may include an OIS-x driving unit. The OIS driving unit may include an OIS-x driving unit. The OIS-x driving unit may move the housing (310) in the x-axis direction perpendicular to the optical axis. The OIS-x driving unit may move the housing (310) in the x-axis direction perpendicular to the optical axis through electromagnetic force. The OIS-x driving unit may include a coil and a magnet.

[0090] The lens actuator (10) may include a magnet (410) and an OIS-x coil (430) that move the housing (310) in the x-axis direction perpendicular to the optical axis direction.

[0091] The lens driving device (10) may include an OIS-y driving unit. The OIS driving unit may include an OIS-y driving unit. The OIS-y driving unit may move the housing (310) in the y-axis direction. The OIS-y driving unit may move the housing (310) in the y-axis direction perpendicular to both the optical axis and the x-axis direction through electromagnetic force. The OIS-y driving unit may include a coil and a magnet.

[0092] The lens actuator (10) may include a magnet (410) and an OIS-y coil (440) that move the housing (310) in the y-axis direction perpendicular to the optical axis direction and the x-axis direction.

[0093] The lens driving device (10) may include a magnet (410). The driving unit may include a magnet (410). The magnet (410) may include an AF magnet. The magnet (410) may include an OIS magnet. The magnet (410) may include an OIS-x magnet. The magnet (410) may include an OIS-y magnet.

[0094] The magnet (410) can be placed in the housing (310). The magnet (410) can be fixed to the housing (310). The magnet (410) can be coupled to the housing (310). The magnet (410) can be bonded to the housing (310) with an adhesive. The magnet (410) can move integrally with the housing (310). The magnet (410) can be placed on the base (110). The magnet (410) can be placed within the cover (130).

[0095] The magnet (410) can interact with the AF coil (420). The magnet (410) can interact with the OIS-x coil (430). The magnet (410) can interact with the OIS-y coil (440). The magnet (410) can interact with the AF coil (420) and the OIS-x coil (430). The magnet (410) can interact with the AF coil (420) and the OIS-y coil (440). The magnet (410) can interact with the AF coil (420), the OIS-x coil (430), and the OIS-y coil (440). The magnet (410) can be used for both AF operation and OIS operation.

[0096] The magnet (410) can electromagnetically interact with the AF coil (420). The magnet (410) can be positioned corresponding to the AF coil (420). The magnet (410) can be positioned corresponding to the AF coil (420). The magnet (410) can correspond to the AF coil (420). The magnet (410) can face the AF coil (420). The magnet (410) can face the AF coil (420).

[0097] The magnet (410) can electromagnetically interact with the OIS-x coil (430). The magnet (410) can be positioned corresponding to the OIS-x coil (430). The magnet (410) can be positioned corresponding to the OIS-x coil (430). The magnet (410) can correspond to the OIS-x coil (430). The magnet (410) can face the OIS-x coil (430). The magnet (410) can face the OIS-x coil (430).

[0098] The magnet (410) can electromagnetically interact with the OIS-y coil (440). The magnet (410) can be positioned corresponding to the OIS-y coil (440). The magnet (410) can be positioned corresponding to the OIS-y coil (440). The magnet (410) can correspond to the OIS-y coil (440). The magnet (410) can face the OIS-y coil (440). The magnet (410) can face the OIS-y coil (440).

[0099] The magnet (410) may include a plurality of magnets. The magnet (410) may include four magnets. The magnet (410) may include first to fourth magnets (411, 412, 413, 414).

[0100] The first magnet (411) can interact with the first unit coil (431) of the OIS-x coil (430). The first magnet (411) can electromagnetically interact with the first unit coil (431) of the OIS-x coil (430). The first magnet (411) can be positioned corresponding to the first unit coil (431) of the OIS-x coil (430). The first magnet (411) can face the first unit coil (431) of the OIS-x coil (430). The first magnet (411) can overlap the first unit coil (431) of the OIS-x coil (430) in the x-axis direction. The first magnet (411) may be placed between the first unit coil (431) and the second unit coil (432) of the OIS-x coil (430). The first magnet (411) may be placed between the first unit coil (431) and the second unit coil (432) of the OIS-x coil (430) in the x-axis direction.

[0101] The first magnet (411) may include an inner surface and an outer surface. The inner surface and the outer surface of the first magnet (411) may be arranged on opposite sides. The inner surface of the first magnet (411) may face the AF coil (420). The outer surface of the first magnet (411) may face the OIS-x coil (430). The inner surface of the first magnet (411) may be a N pole and the outer surface of the first magnet (411) may be a S pole. Conversely, the inner surface of the first magnet (411) may be a S pole and the outer surface of the first magnet (411) may be a N pole. That is, the inner surface of the first magnet (411) may be a two-pole magnet formed by one of the N pole and the S pole and the outer surface of the first magnet (411) is formed by the other of the N pole and the S pole.

[0102] The second magnet (412) can interact with the second unit coil (432) of the OIS-x coil (430). The second magnet (412) can electromagnetically interact with the second unit coil (432) of the OIS-x coil (430). The second magnet (412) can be positioned corresponding to the second unit coil (432) of the OIS-x coil (430). The second magnet (412) can face the second unit coil (432) of the OIS-x coil (430). The second magnet (412) can overlap the second unit coil (432) of the OIS-x coil (430) in the x-axis direction. The second magnet (412) may be placed between the first unit coil (431) and the second unit coil (432) of the OIS-x coil (430). The second magnet (412) may be placed between the first unit coil (431) and the second unit coil (432) of the OIS-x coil (430) in the x-axis direction.

[0103] The second magnet (412) may include an inner surface and an outer surface. The inner surface and the outer surface of the second magnet (412) may be arranged on opposite sides. The inner surface of the second magnet (412) may face the AF coil (420). The outer surface of the second magnet (412) may face the OIS-x coil (430). The inner surface of the second magnet (412) may be a N pole and the outer surface of the second magnet (412) may be a S pole. Conversely, the inner surface of the second magnet (412) may be a S pole and the outer surface of the second magnet (412) may be a N pole. That is, the inner surface of the second magnet (412) may be a two-pole magnet formed by one of the N pole and the S pole and the outer surface of the second magnet (412) is formed by the other of the N pole and the S pole.

[0104] The third magnet (413) can interact with the third unit coil (441) of the OIS-y coil (440). The third magnet (413) can electromagnetically interact with the third unit coil (441) of the OIS-y coil (440). The third magnet (413) can be positioned corresponding to the third unit coil (441) of the OIS-y coil (440). The third magnet (413) can face the third unit coil (441) of the OIS-y coil (440). The third magnet (413) can overlap the third unit coil (441) of the OIS-y coil (440) in the y-axis direction. The third magnet (413) may be placed between the third unit coil (441) and the fourth unit coil (442) of the OIS-y coil (440). The third magnet (413) may be placed between the third unit coil (441) and the fourth unit coil (442) of the OIS-y coil (440) in the y-axis direction.

[0105] The third magnet (413) may include an inner surface and an outer surface. The inner surface and the outer surface of the third magnet (413) may be arranged on opposite sides. The inner surface of the third magnet (413) may face the AF coil (420). The outer surface of the third magnet (413) may face the OIS-y coil (440). The inner surface of the third magnet (413) may be a N pole and the outer surface of the third magnet (413) may be a S pole. Conversely, the inner surface of the third magnet (413) may be a S pole and the outer surface of the third magnet (413) may be a N pole. In other words, the inner surface of the third magnet (413) may be a two-pole magnet formed by one of the N pole and the S pole and the outer surface of the third magnet (413) is formed by the other of the N pole and the S pole.

[0106] The fourth magnet (414) can interact with the fourth unit coil (442) of the OIS-y coil (440). The fourth magnet (414) can electromagnetically interact with the fourth unit coil (442) of the OIS-y coil (440). The fourth magnet (414) can be positioned corresponding to the fourth unit coil (442) of the OIS-y coil (440). The fourth magnet (414) can face the fourth unit coil (442) of the OIS-y coil (440). The fourth magnet (414) can overlap the fourth unit coil (442) of the OIS-y coil (440) in the y-axis direction. The fourth magnet (414) may be placed between the third unit coil (441) and the fourth unit coil (442) of the OIS-y coil (440). The fourth magnet (414) may be placed between the third unit coil (441) and the fourth unit coil (442) of the OIS-y coil (440) in the y-axis direction.

[0107] The fourth magnet (414) may include an inner surface and an outer surface. The inner surface and the outer surface of the fourth magnet (414) may be arranged on opposite sides. The inner surface of the fourth magnet (414) may face the AF coil (420). The outer surface of the fourth magnet (414) may face the OIS-y coil (440). The inner surface of the fourth magnet (414) may be a N pole and the outer surface of the fourth magnet (414) may be a S pole. Conversely, the inner surface of the fourth magnet (414) may be a S pole and the outer surface of the fourth magnet (414) may be a N pole. In other words, the inner surface of the fourth magnet (414) may be a two-pole magnet formed by one of the N pole and the S pole and the outer surface of the fourth magnet (414) is formed by the other of the N pole and the S pole.

[0108] The lens driving device (10) may include an AF coil (420). The driving unit may include the AF coil (420). The AF driving unit may include the AF coil (420). The AF coil (420) may be an AF driving coil. When current is applied to the AF coil (420), the bobbin (210) may move in the optical axis direction. The AF coil (420) may move the bobbin (210) in the optical axis direction. The AF coil (420) may move in the optical axis direction as one body with the bobbin (210). The AF coil (420) may interact with the magnet (410). The AF coil (420) may electronically interact with the magnet (410). The AF coil (420) can electromagnetically interact with the first to fourth magnets (411, 412, 413, 414). The AF coil (420) can overlap the magnet (410) in a direction perpendicular to the optical axis. The AF coil (420) can be positioned at a position corresponding to the magnet (410). The AF coil (420) can face the magnet (410). The AF coil (420) can move in a direction perpendicular to the direction in which the magnet (410) and the AF coil (420) face each other.

[0109] The distance in the direction perpendicular to the optical axis between the AF coil (420) and the magnet (410) can be maintained constant. The distance in the x-axis direction between the AF coil (420) and the magnet (410) can be maintained constant. The distance in the y-axis direction between the AF coil (420) and the magnet (410) can be maintained constant.

[0110] The lens driving device (10) may include an OIS-x coil (430). The driving unit may include the OIS-x coil (430). The OIS driving unit may include the OIS-x coil (430). The OIS-x driving unit may include the OIS-x coil (430). The OIS-x coil (430) may be a coil for driving the OIS-x. When current is applied to the OIS-x coil (430), the housing (310) may move in the x-axis direction. The OIS-x coil (430) may move the housing (310) in the x-axis direction perpendicular to the optical axis direction. The OIS-x coil (430) may move the magnet (410) in a direction parallel to the direction in which the OIS-x coil (430) and the magnet (410) face each other. That is, the OIS-x coil (430) can move the magnet (410) away from or closer to the OIS-x coil (430).

[0111] The OIS-x coil (430) may include multiple coils. The OIS-x coil (430) may include two coils.

[0112] The OIS-x coil (430) may include a first unit coil (431). The first unit coil (431) may be arranged on the outside of the first magnet (411) so as to overlap with the first magnet (411) in the x-axis direction. The first unit coil (431) may be arranged on the side plate (132) of the cover (130). The first unit coil (431) may be arranged on the inner surface of the side plate (132) of the cover (130). The first unit coil (431) may be arranged on the substrate (120). The first unit coil (431) may be electrically connected to the substrate (120).

[0113] The OIS-x coil (430) may include a second unit coil (432). The second unit coil (432) may be disposed on the outside of the second magnet (412) so as to overlap with the second magnet (412) in the x-axis direction. The second unit coil (432) may be disposed on the side plate (132) of the cover (130). The second unit coil (432) may be disposed on the inner surface of the side plate (132) of the cover (130). The second unit coil (432) may be disposed on the substrate (120). The second unit coil (432) may be electrically connected to the substrate (120).

[0114] When the first unit coil (431) and the first magnet (411) move away from each other, the second unit coil (432) and the second magnet (412) may move closer together. Conversely, when the second unit coil (432) and the second magnet (412) move away from each other, the first unit coil (431) and the first magnet (411) may move closer together.

[0115] The sum of the distance between the first unit coil (431) and the first magnet (411) and the distance between the second unit coil (432) and the second magnet (412) can be maintained constant. In the case where the housing (310) moves to the left as in (a) of FIG. 18, the sum of the first distance between the first unit coil (431) and the first magnet (411) (see a of (a) of FIG. 18) and the second distance between the second unit coil (432) and the second magnet (412) (see b of (a) of FIG. 18) may be equal to the sum of the third distance between the first unit coil (431) and the first magnet (411) (see c of (b) of FIG. 18) and the fourth distance between the second unit coil (432) and the second magnet (412) (see d of (b) of FIG. 18)) in the case where the housing (310) moves to the right as in (b) of FIG. 18.

[0116] The lens driving device (10) may include an OIS-y coil (440). The driving unit may include the OIS-y coil (440). The OIS driving unit may include the OIS-y coil (440). The OIS-y driving unit may include the OIS-y coil (440). The OIS-y coil (440) may be a coil for driving the OIS-y. When current is applied to the OIS-y coil (440), the housing (310) may move in the y-axis direction. The OIS-y coil (440) may move the housing (310) in the y-axis direction perpendicular to the optical axis direction and the x-axis direction. The OIS-y coil (440) may move the magnet (410) in a direction parallel to the direction in which the OIS-y coil (440) and the magnet (410) face each other. That is, the OIS-y coil (440) can move the magnet (410) away from or closer to the OIS-y coil (440).

[0117] The OIS-y coil (440) may include multiple coils. The OIS-y coil (440) may include two coils.

[0118] The OIS-y coil (440) may include a third unit coil (441). The third unit coil (441) may be arranged on the outside of the third magnet (413) so as to overlap with the third magnet (413) in the y-axis direction. The third unit coil (441) may be arranged on the side plate (132) of the cover (130). The third unit coil (441) may be arranged on the inner surface of the side plate (132) of the cover (130). The third unit coil (441) may be arranged on the substrate (120). The third unit coil (441) may be electrically connected to the substrate (120).

[0119] The OIS-y coil (440) may include a fourth unit coil (442). The fourth unit coil (442) may be disposed on the outside of the fourth magnet (414) so ​​as to overlap with the fourth magnet (414) in the y-axis direction. The fourth unit coil (442) may be disposed on the side plate (132) of the cover (130). The fourth unit coil (442) may be disposed on the inner surface of the side plate (132) of the cover (130). The fourth unit coil (442) may be disposed on the substrate (120). The fourth unit coil (442) may be electrically connected to the substrate (120).

[0120] When the third unit coil (441) and the third magnet (413) move away from each other, the fourth unit coil (442) and the fourth magnet (414) may move closer together. Conversely, when the fourth unit coil (442) and the fourth magnet (414) move away from each other, the third unit coil (441) and the third magnet (413) may move closer together.

[0121] The sum of the distance between the third unit coil (441) and the third magnet (413) and the distance between the fourth unit coil (442) and the fourth magnet (414) can be maintained constant. When the housing (310) moves to one side in the y-axis direction, the sum of the first distance between the third unit coil (441) and the third magnet (413) and the second distance between the fourth unit coil (442) and the fourth magnet (414) can be equal to the sum of the third distance between the third unit coil (441) and the third magnet (413) and the fourth distance between the fourth unit coil (442) and the fourth magnet (414) when the housing (310) moves to the other side in the y-axis direction.

[0122] The AF coil (420) may be placed on the side plate (132) of the cover (130). The AF coil (420) may be placed directly on the side plate (132) of the cover (130). The AF coil (420) may be in contact with the side plate (132) of the cover (130). Both ends of the AF coil (420) may extend downward and be coupled to the substrate (120).

[0123] The OIS-x coil (430) can be placed on the side plate (132) of the cover (130). The OIS-x coil (430) can be placed directly on the side plate (132) of the cover (130). The OIS-x coil (430) can be in contact with the side plate (132) of the cover (130). Both ends of the OIS-x coil (430) can extend downward and be coupled to the substrate (120).

[0124] The OIS-y coil (440) can be placed on the side plate (132) of the cover (130). The OIS-y coil (440) can be placed directly on the side plate (132) of the cover (130). The OIS-y coil (440) can be in contact with the side plate (132) of the cover (130). Both ends of the OIS-y coil (440) can extend downward and be coupled to the substrate (120).

[0125] When viewed from above, the OIS-x coil (430) may be larger than the magnet (410). The area of ​​the upper surface of the OIS-x coil (430) may be larger than the area of ​​the upper surface of the magnet (410). The area of ​​the upper surface of the first unit coil (431) may be larger than the area of ​​the upper surface of the first magnet (411). The area of ​​the upper surface of the second unit coil (432) may be larger than the area of ​​the upper surface of the second magnet (412).

[0126] When viewed from above, the OIS-y coil (440) may be larger than the magnet (410). The area of ​​the upper surface of the OIS-y coil (440) may be larger than the area of ​​the upper surface of the magnet (410). The area of ​​the upper surface of the third unit coil (441) may be larger than the area of ​​the upper surface of the third magnet (413). The area of ​​the upper surface of the fourth unit coil (442) may be larger than the area of ​​the upper surface of the fourth magnet (414).

[0127] In the present embodiment, as illustrated in (a) of FIG. 17, the OIS-x coil (430) and the OIS-y coil (440) may be arranged symmetrically on both sides with respect to the optical axis. The first unit coil (431) may be arranged symmetrically with respect to the second unit coil (432) with respect to the optical axis. The third unit coil (441) may be arranged symmetrically with respect to the fourth unit coil (442) with respect to the optical axis.

[0128] In (b) of Fig. 17, the x-axis represents the distance between the coil and the magnet, and the y-axis represents the electromagnetic force. Therefore, according to the present embodiment, when the distance between the coil and the magnet on one side increases, the distance between the coil and the magnet on the other side decreases, so that the electromagnetic force between the coil and the magnet can be maintained at a preset value or higher throughout the entire operation of the image stabilization drive. In the present embodiment, the aforementioned feature enables compensation for 3 degrees of image stabilization on one side. That is, 6 degrees of image stabilization on both sides can be compensated. In order to compensate for 3 degrees of image stabilization on one side, the unilateral stroke of the housing (310) may be 0.8 to 1 mm.

[0129] In a comparative example, as shown in (a) of Fig. 16, when the magnet (410a) and the OIS-x coil (430a) are arranged only on one side, and the magnet (410a) and the OIS-y coil (440a) are arranged only on the other side, as shown in (b) of Fig. 16, the electromagnetic force may decrease as the distance between the coil and the magnet increases. For reference, in (b) of Fig. 16, the x-axis is the distance between the coil and the magnet, and the y-axis is the electromagnetic force.

[0130] The lens driving device (10) may include a sensor. The lens driving device (10) may include an OIS sensor (450). The OIS sensor (450) may detect a magnet (410). The OIS sensor (450) may be positioned corresponding to the magnet (410). The OIS sensor (450) may be positioned corresponding to the magnet (410). The OIS sensor (450) may overlap the magnet (410) in the optical axis direction. The OIS sensor (450) may be a Hall sensor. The Hall sensor may detect the magnetic force of the magnet.

[0131] The OIS sensor (450) may include a plurality of sensors. The OIS sensor (450) may include two sensors. The OIS sensor (450) may include an OIS-x sensor. The OIS sensor (450) may include an OIS-y sensor. One of the "OIS-x sensor" and the "OIS-y sensor" may be referred to as a "first sensor" and the other may be referred to as a "second sensor." The OIS-x sensor may detect movement of the magnet (410) in the x-axis direction. The OIS-y sensor may detect movement of the magnet (410) in the y-axis direction.

[0132] The lens actuator (10) may include a guide member. The guide member may guide the movement of the moving part. The guide member may guide the moving part to move in a specific direction relative to the fixed part.

[0133] The lens actuator (10) may include an upper elastic member (510). The guide member may include the upper elastic member (510). The upper elastic member (510) may be coupled to the housing (310) and the bobbin (210). The upper elastic member (510) may be coupled to the upper surface of the housing (310) and the bobbin (210). The upper elastic member (510) may be coupled to the upper surface of the housing (310) and the bobbin (210). The upper elastic member (510) may be coupled to the upper surface of the housing (310) and the upper surface of the bobbin (210). The upper elastic member (510) may be coupled to the upper surface of the housing (310) and the upper surface of the bobbin (210). The upper elastic member (510) may connect the housing (310) and the bobbin (210). The upper elastic member (510) can be placed on the upper side of the lower elastic member (520).

[0134] The upper elastic member (510) may include a plurality of upper elastic members. The upper elastic member (510) may include two upper elastic members. The upper elastic member (510) may include a pair of upper elastic members. The upper elastic member (510) may include first and second upper elastic members (510a, 510b). The first and second upper elastic members (510a, 510b) may be electrically connected to the AF coil (420). The AF coil (420) may be electrically connected to the substrate (120) through the first and second upper elastic members (510a, 510b) and the support member (530).

[0135] The upper elastic member (510) may include an inner portion (511). The inner portion (511) may be coupled to a bobbin (210). The inner portion (511) may be coupled to an upper surface of the bobbin (210). The inner portion (511) may be arranged on an upper surface of the bobbin (210). The inner portion (511) may be arranged on the inner side of the outer portion (512).

[0136] The upper elastic member (510) may include an outer portion (512). The outer portion (512) may be coupled to the housing (310). The outer portion (512) may be coupled to the upper surface of the housing (310). The outer portion (512) may be disposed on the upper surface of the housing (310). The outer portion (512) may be disposed on the outer side of the inner portion (511).

[0137] The upper elastic member (510) may include a first connecting portion (513). The first connecting portion (513) may connect the inner portion (511) and the outer portion (512). The first connecting portion (513) may directly connect the inner portion (511) and the outer portion (512). The first connecting portion (513) may elastically connect the inner portion (511) and the outer portion (512). The first connecting portion (513) may have elasticity. The first connecting portion (513) may include a bent shape. The first connecting portion (513) may include a bent portion.

[0138] The upper elastic member (510) may include a coupling portion (514). The coupling portion (514) may be coupled to the support member (530). The coupling portion (514) may be positioned on the outside of the outer portion (512). The coupling portion (514) may be positioned in a corner area of ​​the housing (310).

[0139] The upper elastic member (510) may include a second connecting portion (515). The second connecting portion (515) may connect the outer portion (512) and the connecting portion (514). The second connecting portion (515) may directly connect the outer portion (512) and the connecting portion (514). The second connecting portion (515) may elastically connect the outer portion (512) and the connecting portion (514). The second connecting portion (515) may have elasticity. The second connecting portion (515) may include a bent shape. The second connecting portion (515) may include a bent portion.

[0140] The lens actuator (10) may include a lower elastic member (510). The guide member may include a lower elastic member (520). The lower elastic member (520) may be coupled to the housing (310) and the bobbin (210). The lower elastic member (520) may be coupled to the lower surface of the housing (310) and the bobbin (210). The lower elastic member (520) may be coupled to the lower surface of the housing (310) and the bobbin (210). The lower elastic member (520) may be coupled to the lower surface of the housing (310) and the lower surface of the bobbin (210). The lower elastic member (520) may be coupled to the lower surface of the housing (310) and the lower surface of the bobbin (210). The lower elastic member (520) may connect the housing (310) and the bobbin (210). The lower elastic member (520) can be placed on the lower side of the upper elastic member (510).

[0141] The lower elastic member (520) may include an inner portion (521). The inner portion (521) may be coupled to the bobbin (210). The inner portion (521) may be coupled to the lower surface of the bobbin (210). The inner portion (521) may be arranged on the lower surface of the bobbin (210). The inner portion (521) may be arranged on the inner side of the outer portion (522).

[0142] The lower elastic member (520) may include an outer portion (522). The outer portion (522) may be coupled to the housing (310). The outer portion (522) may be coupled to the lower surface of the housing (310). The outer portion (522) may be disposed on the lower surface of the housing (310). The outer portion (522) may be disposed on the outer side of the inner portion (511).

[0143] The lower elastic member (520) may include a first connecting portion (523). The first connecting portion (523) may connect the inner portion (521) and the outer portion (522). The first connecting portion (523) may directly connect the inner portion (521) and the outer portion (522). The first connecting portion (523) may elastically connect the inner portion (521) and the outer portion (522). The first connecting portion (523) may have elasticity. The first connecting portion (523) may include a bent shape. The first connecting portion (523) may include a bent portion.

[0144] The lower elastic member (520) may include a second connecting portion (524). The second connecting portion (524) may connect the outer portions (522) to each other. The second connecting portion (524) may be understood as a component of the outer portion (522).

[0145] The lens actuator (10) may include a support member (530). The support member (530) may be an elastic member. The support member (530) may have elasticity. The support member (530) may include a wire. As a variation, the support member (530) may include a plate spring. The support member (530) may support the housing (310) with respect to the base (110). The support member (530) may movably support the housing (310). The support member (530) may elastically support the housing (310). The support member (530) may be coupled to the upper elastic member (510). The support member (530) may be coupled to the coupling portion (514) of the upper elastic member (510). The support member (530) may be coupled to the substrate (120). The support member (530) can be directly connected to the substrate (120). The support member (530) can be soldered to the substrate (120). The support member (530) can be soldered to the lower surface of the substrate (120). The support member (530) can be electrically connected to the upper elastic member (510). The support member (530) can be electrically connected to the substrate (120). The support member (530) can be disposed between the housing (310) and the cover (130).

[0146] As a variation, the lens actuator (10) may include a ball. The ball may be disposed between the base (110) and the housing (310). The ball may be disposed on the base (110). The ball may be disposed on the upper surface of the base (110). The ball may be disposed on the substrate (120). The ball may be disposed on the housing (310). The ball may be disposed on the upper side of the base (110). The ball may be disposed on the lower side of the housing (310). The ball may guide the housing (310) to move in a direction perpendicular to the optical axis with respect to the base (110). The ball may guide the housing (310) to move in the x-axis direction and the y-axis direction with respect to the base (110).

[0147] The lens actuator (10) may include a ball pressurizing member. The ball pressurizing member may include an elastic member. The elastic member may pressurize the ball between the base (110) and the housing (310). The elastic member may maintain the ball in close contact with the base (110) and the housing (310). The elastic member may include an upper elastic member (510) and a support member (530).

[0148] As a variation, the ball press member may include a lower elastic member (520) of a deformed shape. The lower elastic member (520) may include an inner portion (521) coupled with the bobbin (210), an outer portion (522) coupled with the housing (310), a first connecting portion (523) connecting the inner portion (521) and the outer portion (522), a second connecting portion (524) connecting the outer portions (522) to each other, a first connecting portion coupled with the base (110) or the substrate (120), a second connecting portion coupled with the support member (530), a third connecting portion connecting the outer portion (522) and the first connecting portion, and a fourth connecting portion connecting the first connecting portion and the second connecting portion.

[0149] That is, the lower elastic member (520) can be directly connected to the base (110) or the substrate (120). Through this, a downward pressure is generated on the housing (310), so that the ball can be maintained in a close contact state between the housing (310) and the base (110).

[0150] Additionally, the lower elastic member (520) may be directly coupled to the support member (530). That is, in a modified example, the lower end of the support member (530) may be coupled to the lower elastic member (520) rather than the substrate (120).

[0151] The lower elastic member (520) includes an extension portion extending outward from the outer portion (522), and the base (110) or substrate (120) and the support member (530) can be coupled to the extension portion of the lower elastic member (520). The extension portion can include a first coupling portion, a second coupling portion, a third coupling portion, and a fourth coupling portion.

[0152]

[0153] Below, the auto focus (AF) operation of the lens driving device according to the present embodiment is described.

[0154] Fig. 19 is a drawing for explaining the AF operation of the lens driving device according to the present embodiment.

[0155] The moving part may be positioned at a position spaced apart from both the upper plate (131) of the cover (130) and the base (110) in an initial position where no current is applied to the AF coil (420). At this time, the moving part may include a bobbin (210). Furthermore, the moving part may include a bobbin (210), a lens, and an AF coil (420).

[0156] When current is applied to the AF coil (420), the AF moving part (see A in FIG. 19) can move upward or downward along the optical axis (see B in FIG. 27).

[0157] When a forward current is applied to the AF coil (420), the AF coil (420) can move upward in the optical axis direction due to the electromagnetic interaction between the AF coil (420) and the magnet (410). At this time, the bobbin (210) can move upward in the optical axis direction together with the AF coil (420). Furthermore, the lens can move upward in the optical axis direction together with the bobbin (210). Accordingly, the distance between the lens and the image sensor (220) can be changed, so that the focus of the image formed on the image sensor (220) through the lens can be adjusted.

[0158] When a reverse current is applied to the AF coil (420), the AF coil (420) can move downward in the optical axis direction due to the electromagnetic interaction between the AF coil (420) and the magnet (410). At this time, the bobbin (210) can move downward in the optical axis direction together with the AF coil (420). Furthermore, the lens can move downward in the optical axis direction together with the bobbin (210). Accordingly, the distance between the lens and the image sensor (220) can be changed, so that the focus of the image formed on the image sensor (220) through the lens can be adjusted.

[0159]

[0160] Below, the optical image stabilization (OIS) operation of the lens driving device according to the present embodiment is described.

[0161] Fig. 20 is a drawing for explaining OIS operation of a lens driving device according to the present embodiment.

[0162] The moving part can be placed in the initial position without current being applied to the OIS-x coil (430) and the OIS-y coil (440). At this time, the moving part can include a housing (310). The moving part can include an OIS moving part. The moving part can include an OIS moving part and an AF moving part. Furthermore, the moving part can include a housing (310), a bobbin (210), a lens, an AF coil (420), and a magnet (410).

[0163] When current is applied to the OIS-x coil (430), the moving part (see A in Fig. 20) can move in the x-axis direction (see B in Fig. 20).

[0164] When current is applied to the OIS-x coil (430), the first and second magnets (411, 412) can move in the x-axis direction perpendicular to the optical axis due to the electromagnetic interaction between the OIS-x coil (430) and the first and second magnets (411, 412). At this time, the housing (310) can move in the x-axis direction together with the first and second magnets (411, 412). Furthermore, the bobbin (210) and the lens can move in the x-axis direction together with the housing (310). More specifically, when a positive current is applied to the OIS-x coil (430), the magnet (410), the housing (310), the bobbin (210), and the lens can move in one direction on the x-axis. Additionally, when reverse current is applied to the OIS-x coil (430), the magnet (410), housing (310), bobbin (210), and lens can move in the other direction along the x-axis.

[0165] When current is applied to the OIS-y coil (440), the moving part (see A in Fig. 28) can move in the y-axis direction (see C in Fig. 28).

[0166] When current is applied to the OIS-y coil (440), the third and fourth magnets (413, 414) can move in the y-axis direction perpendicular to the optical axis due to the electromagnetic interaction between the OIS-y coil (440) and the third and fourth magnets (413, 414). At this time, the housing (310) can move in the y-axis direction together with the third and fourth magnets (413, 414). Furthermore, the bobbin (210) and the lens can move in the y-axis direction together with the housing (310). More specifically, when a positive current is applied to the OIS-y coil (440), the magnet (410), the housing (310), the bobbin (210), and the lens can move in one direction on the y-axis. Additionally, when reverse current is applied to the OIS-y coil (440), the magnet (410), housing (310), bobbin (210), and lens can move in the other direction along the y-axis.

[0167] Meanwhile, among the OIS sensors (450), the OIS-x sensor can detect the strength of the magnetic fields of the first and second magnets (411, 412) to detect the amount of movement or position of the first and second magnets (411, 412). The amount of movement or position detected by the OIS-x sensor can be used for x-axis direction shake correction feedback control. Among the OIS sensors (450), the OIS-y sensor can detect the strength of the magnetic fields of the third and fourth magnets (413, 414) to detect the amount of movement or position of the third and fourth magnets (413, 414). The amount of movement or position detected by the OIS-y sensor can be used for y-axis direction shake correction feedback control.

[0168]

[0169] Below, a camera device according to the present embodiment is described with reference to the drawings.

[0170] Fig. 21 is an exploded perspective view of a camera device according to the present embodiment.

[0171] The camera device (10A) may include a camera module.

[0172] 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 bobbin (210) of a lens driving device (10). The lens module (20) may be coupled to the bobbin (210) by screw coupling and / or adhesive. The lens module (20) may move integrally with the bobbin (210).

[0173] 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).

[0174] The camera device (10A) may include a sensor base (40). The sensor base (40) may be disposed between the lens actuator (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 actuator (10) to the sensor base (40). The adhesive member may additionally serve to prevent foreign substances from entering the interior of the lens actuator (10). The adhesive member may include at least one of an epoxy, a thermosetting adhesive, and an ultraviolet-curable adhesive.

[0175] 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, components, 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.

[0176] 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.

[0177] 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.

[0178] 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 (330) 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 (330). 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).

[0179] 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.

[0180]

[0181] Below, an optical device according to the present embodiment is described with reference to the drawings.

[0182] Fig. 22 is a perspective view of an optical device according to the present embodiment. Fig. 23 is a perspective view of an optical device according to a modified example.

[0183] 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.

[0184] 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 a video or image 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. 22, the camera device (10A) may have a triple camera positioned vertically. As illustrated in FIG. 23, the camera device (10A-1) may have a triple camera positioned horizontally. As a variation, the triple camera may be arranged such that an imaginary straight line connecting the first optical axis, the second optical axis, and the third optical axis forms a triangle.

[0185]

[0186] Although the embodiments of the present invention have been described with reference to the attached drawings, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering the technical concept or essential features thereof. Therefore, the embodiments described above should be understood to be illustrative in all respects and not restrictive.

Claims

1. Housing; A bobbin disposed within the housing; A magnet placed in the above housing; A first coil that moves the bobbin in the optical axis direction; and including a second coil that moves the housing in a first direction perpendicular to the optical axis direction; The above magnet interacts with the first coil and the second coil, The above second coil includes a first unit coil and a second unit coil, The magnet includes a first magnet interacting with the first unit coil and a second magnet interacting with the second unit coil, A lens driving device in which the second unit coil and the second magnet become closer when the first unit coil and the first magnet become further apart.

2. In paragraph 1, A lens driving device in which the first magnet and the second magnet are arranged between the first unit coil and the second unit coil in the first direction.

3. In paragraph 1, The first unit coil is arranged on the outside of the first magnet so as to overlap with the first magnet in the first direction, A lens driving device in which the second unit coil is arranged on the outside of the second magnet so as to overlap with the second magnet in the first direction.

4. In paragraph 1, It includes a third coil that moves the housing in a second direction perpendicular to the optical axis direction and the first direction, The above magnet is a lens driving device that interacts with the first coil, the second coil, and the third coil.

5. In paragraph 4, The above third coil includes a third unit coil and a fourth unit coil, The above magnet includes a third magnet interacting with the third unit coil and a fourth magnet interacting with the fourth unit coil, A lens driving device in which the fourth unit coil and the fourth magnet become closer when the third unit coil and the third magnet become further apart.

6. In paragraph 5, A lens driving device in which the third magnet and the fourth magnet are arranged between the third unit coil and the fourth unit coil in the second direction.

7. In paragraph 1, A lens driving device in which the distance in the first direction between the first coil and the magnet is maintained constant.

8. In paragraph 1, A lens driving device in which the first magnet includes an inner surface facing the first coil and an outer surface facing the second coil.

9. In paragraph 8, The above first magnet is a two-pole magnet in which the inner surface is formed with one of the N pole and the S pole and the outer surface is formed with the other of the N pole and the S pole.

10. In paragraph 1, base; and Including a support member that supports the housing on the base, The above housing is a lens actuator placed on the above base.

Images