Lens driving device, camera device, and optical instrument

Abstract

The present embodiment relates to a lens driving device comprising: a base; a first carrier disposed in the base; a second carrier disposed in the first carrier; a first coil and a first magnet for moving the first carrier in an optical axis direction; a second coil and a second magnet for moving the second carrier in a first direction perpendicular to the optical axis direction; a third coil and a third magnet for moving the second carrier in a second direction perpendicular to the optical axis direction and the first direction; and a ball disposed between the first carrier and the second carrier, wherein the second coil includes two coils which are individually controlled, and the ball comes, at three or more points, into contact with one of the first carrier and the second carrier.

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, a guide member exists, and an OIS-x guide ball that guides the lens in the x-axis direction is arranged on the upper side of the guide member, and an OIS-y guide ball that guides the lens in the y-axis direction is arranged on the lower side of the guide member. There is a problem that the length of the lens drive mechanism in the optical axis direction increases due to the mentioned guide member and the two-stage stacked OIS guide ball, and the weight of the AF moving part of the lens drive mechanism increases, thereby restricting the AF drive.

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

[0006] The present embodiment aims to provide a lens driving device that integrates an OIS-x guide ball that guides a lens in the x-axis direction and an OIS-y guide ball that guides a lens in the y-axis direction, while omitting a guide member.

[0007] Furthermore, in order to prevent crosstalk, which is an unintended movement that occurs during x-axis and y-axis driving, we aim to provide a lens driving device that individually controls two OIS-x coils, two OIS-y coils, and two OIS-x sensors and two OIS-y sensors.

[0008] In addition, it is intended to provide an open lens actuator so that one side of the OIS guide ball contacts at three or more points and the other side contacts at one or two points.

[0009] A lens driving device according to the present embodiment comprises: a base; a first carrier disposed within the base; a second carrier disposed within the first carrier; a first coil and a first magnet for moving the first carrier in an optical axis direction; a second coil and a second magnet for moving the second carrier in a first direction perpendicular to the optical axis direction; a third coil and a third magnet for moving the second carrier in a second direction perpendicular to the optical axis direction and the first direction; and a ball disposed between the first carrier and the second carrier, wherein the second coil includes two individually controlled coils, and the ball can contact one of the first carrier and the second carrier at three or more points.

[0010] The above ball can contact the other of the first carrier and the second carrier at one point.

[0011] The ball includes four balls, and each of the four balls can contact one of the first carrier and the second carrier at three or more points.

[0012] The above ball can contact the first carrier at four points.

[0013] It includes a second sensor that detects the second magnet, and the second sensor includes a 2-1 sensor and a 2-2 sensor, and the two coils may include a 2-1 coil controlled by a detection value of the 2-1 sensor and a 2-2 coil controlled by a detection value of the 2-2 sensor.

[0014] The second magnet includes a second-first sensor and a second-second sensor, and the two coils include a second-first coil and a second-second coil, and the second-first sensor can be disposed within the second-first coil, and the second-second sensor can be disposed within the second-second coil.

[0015] The third coil may include two individually controlled coils.

[0016] It includes a third sensor that detects the third magnet, and the third sensor includes a third-1 sensor and a third-2 sensor, and the third coil may include a third-1 coil controlled by a detection value of the third-1 sensor and a third-2 coil controlled by a detection value of the third-2 sensor.

[0017] The above ball can be fixed with an adhesive to either the first carrier or the second carrier.

[0018] A lens driving device according to the present embodiment comprises: a base; a first carrier disposed within the base; a second carrier disposed within the first carrier; a first coil and a first magnet for moving the first carrier in an optical axis direction; a second coil and a second magnet for moving the second carrier in a first direction perpendicular to the optical axis direction; and a third coil and a third magnet for moving the second carrier in a second direction perpendicular to the optical axis direction and the first direction, wherein the second coil includes two individually controlled coils, and one of the first carrier and the second carrier may include a hemispherical protrusion that contacts a groove of the other of the first carrier and the second carrier.

[0019] 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.

[0020] 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.

[0021] Through this embodiment, the guide member is omitted, and the OIS-x guide ball that guides the lens in the x-axis direction and the OIS-y guide ball that guides the lens in the y-axis direction are integrated, so that the length of the lens driving device in the optical axis direction can be minimized.

[0022] Additionally, as the weight of the AF moving part is reduced, the power consumed for AF operation can be reduced.

[0023] Furthermore, production costs can be reduced. OIS stroke can be increased. Alternatively, the same stroke can be achieved with a smaller lens actuator.

[0024] In addition, by individually controlling the two OIS-x coils and the two OIS-y coils with the detection values ​​detected by the two OIS-x sensors and the two OIS-y sensors, crosstalk, which is an unintended movement that occurs during x-axis driving and y-axis driving, can be prevented.

[0025] In addition, since the impact is dispersed through the three-point or more contact structure of the OIS guide ball, the phenomenon of the OIS guide ball striking the contacted injection molded product and damaging the injection molded product can be prevented.

[0026] Fig. 1 is a perspective view of a lens driving device according to the present embodiment.

[0027] Figure 2 is a cross-sectional view taken along line AA of Figure 1.

[0028] Figure 3 is a BB cross-sectional view of Figure 1.

[0029] Fig. 4 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.

[0030] Fig. 5 is an exploded perspective view of a lens driving device according to the present embodiment.

[0031] Fig. 6 is a perspective view showing the moving part and related configuration of the lens driving device according to the present embodiment.

[0032] Fig. 7 is a cross-sectional view showing a guide ball of a lens driving device according to the present embodiment.

[0033] Fig. 8 is a perspective view showing the AF moving part and related configuration of the lens driving device according to the present embodiment.

[0034] Fig. 9 is a perspective view viewed from a different direction than Fig. 8.

[0035] Figure 10 is a plan view and a partially enlarged view of Figure 8 as seen from above.

[0036] Fig. 11 is a perspective view showing the OIS moving part and related configuration of the lens driving device according to the present embodiment.

[0037] Figure 12 is a bottom view and a partially enlarged view of Figure 11.

[0038] Fig. 13 is a perspective view showing a magnet, coil, sensor, and yoke of a lens driving device according to the present embodiment.

[0039] Fig. 14 is a bottom view showing the magnet, coil, sensor, and yoke of the lens driving device according to the present embodiment.

[0040] Fig. 15 is a perspective view showing the polarity of the magnet of the lens driving device according to the present embodiment.

[0041] Fig. 16 is a perspective view showing the OIS-x magnet and the OIS-y magnet of the lens driving device according to a modified example.

[0042] Fig. 17 is a drawing for explaining the AF operation of the lens driving device according to the present embodiment.

[0043] Fig. 18 is a drawing for explaining OIS operation of a lens driving device according to the present embodiment.

[0044] Fig. 19 is an exploded perspective view of a camera device according to the present embodiment.

[0045] Fig. 20 is a perspective view of an optical device according to the present embodiment.

[0046] Figure 21 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. 17).

[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 carrier (210)” and the “OIS carrier (310)” may be referred to as the “first carrier” and the other may be referred to as the “second carrier”.

[0061] Hereinafter, one of the "AF magnet (410)", the "OIS-x magnet (510)", and the "OIS-y magnet (610)" may be referred to as the "first magnet", the other as the "second magnet", and the other as the "third magnet". Furthermore, the distinction configuration of the "first magnet" may be referred to as the "1st-1st magnet", the "1st-2nd magnet", etc., the distinction configuration of the "2nd magnet" may be referred to as the "2nd-1st magnet", the "2nd-2nd magnet", etc., and the distinction configuration of the "3rd magnet" may be referred to as the "3rd-1st magnet", the "3rd-2nd magnet", etc.

[0062] Hereinafter, one of the "AF coil (420)", the "OIS-x coil (520)", and the "OIS-y coil (620)" may be referred to as the "first coil", the other as the "second coil", and the other as the "third coil". Furthermore, the distinction configuration of the "first coil" may be referred to as the "1-1 coil", the "1-2 coil", etc., the distinction configuration of the "2nd coil" may be referred to as the "2-1 coil", the "2-2 coil", etc., and the distinction configuration of the "3rd coil" may be referred to as the "3-1 coil", the "3-2 coil", etc.

[0063] Hereinafter, one of the "AF sensor (430)", the "OIS-x sensor (530)", and the "OIS-y sensor (630)" may be referred to as the "first sensor", the other as the "second sensor", and the other as the "third sensor". Furthermore, the distinction configuration of the "first sensor" may be referred to as the "1st-1 sensor", the "1st-2 sensor", etc., the distinction configuration of the "2nd sensor" may be referred to as the "2nd-1 sensor", the "2nd-2 sensor", etc., and the distinction configuration of the "3rd sensor" may be referred to as the "3rd-1 sensor", the "3rd-2 sensor", etc.

[0064] Hereinafter, one of the "AF yoke (440)", the "OIS-x yoke (540)", and the "OIS-y yoke (640)" may be referred to as the "first yoke", the other as the "second yoke", and the other as the "third yoke". Furthermore, the division configuration of the "first yoke" may be referred to as the "1st-1 yoke", the "1st-2 yoke", etc., the division configuration of the "2nd yoke" may be referred to as the "2nd-1 yoke", the "2nd-2 yoke", etc., and the division configuration of the "3rd yoke" may be referred to as the "3rd-1 yoke", the "3rd-2 yoke", etc.

[0065] Hereinafter, one of the "AF guide ball (710)" and the "OIS guide ball (720)" may be referred to as the "first ball" and the other as the "second ball." In addition, each of the "AF guide ball (710)" and the "OIS guide ball (720)" may be referred to as a "ball."

[0066]

[0067] Below, the configuration of the lens driving device according to the present embodiment is described with reference to the drawings.

[0068] 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 AA of Fig. 1. Fig. 4 is a cross-sectional view taken along line BB of Fig. 1. Fig. 5 is an exploded perspective view of a lens driving device according to the present embodiment when cut in a direction perpendicular to the optical axis and viewed from above. Fig. 5 is an exploded perspective view of a lens driving device according to the present embodiment. Fig. 6 is a perspective view illustrating a moving part and related components of a lens driving device according to the present embodiment. Fig. 7 is a cross-sectional view illustrating a guide ball of a lens driving device according to the present embodiment. Fig. 8 is a perspective view illustrating an AF moving part and related components of a lens driving device according to the present embodiment. Fig. 9 is a perspective view viewed from a different direction from Fig. 8. Fig. 10 is a plan view and a partially enlarged view of Fig. 8 when viewed from above. Fig. 11 is a perspective view illustrating an OIS moving part and related components of a lens driving device according to the present embodiment. Fig. 12 is a bottom view and a partially enlarged view of Fig. 11 when viewed from below. Fig. 13 is a perspective view illustrating a magnet, a coil, a sensor, and a yoke of a lens driving device according to the present embodiment. Fig. 14 is a bottom view illustrating a magnet, a coil, a sensor, and a yoke of a lens driving device according to the present embodiment. Fig. 15 is a perspective view illustrating the polarity of a magnet of a lens driving device according to the present embodiment. Fig. 16 is a perspective view illustrating an OIS-x magnet and an OIS-y magnet of a lens driving device according to a modified example.

[0069] 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.

[0070] 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).

[0071] The lens actuator (10) may include a base (110). The fixing member (100) may include the base (110). The base (110) may accommodate an AF carrier (210) therein. The base (110) may accommodate an OIS carrier (310) therein. The base (110) may be coupled to a cover member. The base (110) may be coupled to a substrate (120). The base (110) may be disposed within the substrate (120).

[0072] The base (110) may include a groove (111). The groove (111) may be an "AF guide ball receiving groove." An AF guide ball (710) may be arranged in the groove (111). The groove (111) may be in direct contact with the AF guide ball (710). The groove (111) may be arranged in the optical axis direction. The groove (111) may guide the AF guide ball (710) to move in the optical axis direction. The groove (111) may include a plurality of grooves. The groove (111) may include two grooves. The two grooves may be arranged parallel to each other.

[0073] The lens driving device (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). The substrate (120) may be disposed on the outer side of the base (110). The substrate (120) may be disposed on the outer surface of the base (110). Alternatively, the substrate (120) may be disposed on the cover member. The substrate (120) may be disposed on a side plate of the cover member. Coils (420, 520, 620) may be disposed on the substrate (120). Sensors (430, 530, 630) may be disposed on the substrate (120). The substrate (120) may be electrically connected to the coils (420, 520, 620). The substrate (120) may be electrically connected to the sensors (430, 530, 630). The substrate (120) may be a circuit board. The substrate (120) may be a printed circuit board. The substrate (120) may be an FPCB.

[0074] The substrate (120) may include a first substrate. An AF coil (420) may be disposed on the first substrate. An AF sensor (430) may be disposed on the first substrate. The substrate (120) may include a second substrate. An OIS-y coil (620) may be disposed on the second substrate. An OIS-y sensor (630) may be disposed on the second substrate. The substrate (120) may include a third substrate. An OIS-x coil (520) may be disposed on the third substrate. An OIS-x sensor (530) may be disposed on the third substrate. The first substrate and the second substrate may be disposed on opposite sides. The third substrate may connect the first substrate and the second substrate. The first to third substrates may be formed integrally.

[0075] The lens actuator (10) may include a cover member (not shown). The fixing member (100) may include the cover member. The cover member may be disposed on the base (110). The cover member may be disposed on the base (110). The cover member may be coupled to the base (110). The cover member may be fixed to the base (110). The cover member may accommodate an AF carrier (210) therein. The cover member may accommodate an OIS carrier (310) therein. The cover member may be a shield member. The cover member may be a shield can.

[0076] The cover member may include a top plate. The top plate may be positioned on the moving member. The upward movement of the moving member may be restricted by the moving member contacting the top plate. The upward movement of the AF carrier (210) may be restricted by the AF carrier (210) contacting the top plate. The upward movement of the OIS carrier (310) may be restricted by the OIS carrier (310) contacting the top plate.

[0077] The cover member may include a side plate. The side plate may extend from the top plate. The side plate may be disposed on the base (110). The side plate may be disposed on a stepped portion protruding from the lower portion of the outer surface of the base (110). The side plate may include a plurality of side plates. The side plate may include four side plates. The side plates may include a first side plate and a second side plate disposed opposite each other, and a third side plate and a fourth side plate disposed opposite each other.

[0078] 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.

[0079] The lens driving device (10) may include an AF moving unit (200). The moving unit may include an AF moving unit (200). The AF moving unit (200) may be an AF moving body. The AF moving unit (200) may be disposed on the fixed unit (100). The AF moving unit (200) may be disposed within the fixed unit (100). The AF moving unit (200) may be disposed on the fixed unit (100). The AF moving unit (200) may be disposed on the outside of the OIS moving unit (300). The AF moving unit (200) may be disposed between the fixed unit (100) and the OIS moving unit (300). The AF moving unit (200) may be disposed movably on the fixed unit (100). The AF moving unit (200) can move in the optical axis direction with respect to the fixed unit (100) by the AF driving unit (400). The AF moving unit (200) can move when the AF is driven.

[0080] The lens driving device (10) may include an AF carrier (210). The AF moving unit (200) may include the AF carrier (210). The AF carrier (210) may be a “housing.” The AF carrier (210) may be an “AF holder.” The AF carrier (210) may be disposed within the base (110). The AF carrier (210) may be disposed on the base (110). The AF carrier (210) may be disposed within a cover member. The AF carrier (210) may be disposed on the outside of the OIS carrier (310). The AF carrier (210) may be disposed between the base (110) and the OIS carrier (310). The AF carrier (210) may be disposed to be movable in the optical axis direction.

[0081] The AF carrier (210) may include a groove (211). The groove (211) may be an "AF guide ball receiving groove." An AF guide ball (710) may be arranged in the groove (211). The groove (211) may be in direct contact with the AF guide ball (710). The groove (211) may be arranged in the optical axis direction. The groove (211) may guide the AF guide ball (710) to move in the optical axis direction. The groove (211) may include a plurality of grooves. The groove (211) may include two grooves. The two grooves may be arranged parallel to each other.

[0082] The AF carrier (210) may include a groove (212). The groove (212) may be an "OIS guide ball receiving groove." The groove (212) may be formed on the lower plate of the AF carrier (210). The groove (212) may be formed on the upper surface of the AF carrier (210). The groove (212) may be concavely formed on the upper surface of the AF carrier (210). An OIS guide ball (720) may be placed in the groove (212). The OIS guide ball (720) may be in contact with the groove (212). The groove (212) may be in contact with the OIS guide ball (720) at four points. Alternatively, the groove (212) may be in contact with the OIS guide ball (720) at three points. The groove (212) may be in contact with the OIS guide ball (720) at five or more points. The OIS guide ball (720) can rotate on the groove (212). However, the OIS guide ball (720) cannot slide on the groove (212).

[0083] Hereinafter, either “home (211)” or “home (212)” may be referred to as “first home” and the other may be referred to as “second home”.

[0084] The lens actuator (10) may include a cover (220). The AF moving unit (200) may include a cover (220). The cover (220) may be coupled to the AF carrier (210). The cover (220) may prevent the OIS carrier (310) from being detached upward. The OIS carrier (310) may be positioned between the AF carrier (210) and the cover (220) in the optical axis direction.

[0085] The lens driving device (10) may include an OIS moving unit (300). The OIS moving unit (300) may be an OIS moving body. The OIS moving unit (300) may be disposed in the fixed unit (100). The OIS moving unit (300) may be disposed within the fixed unit (100). The OIS moving unit (300) may be disposed on the fixed unit (100). The OIS moving unit (300) may be disposed within the AF moving unit (200). The OIS moving unit (300) may be disposed on the AF moving unit (200). The OIS moving unit (300) may be disposed to be movable. The OIS moving unit (300) 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 (300) may move when the OIS is driven. The OIS moving unit (300) can move in the x-axis direction by the OIS-x driving unit (500). The OIS moving unit (300) can move in the y-axis direction by the OIS-y driving unit (600).

[0086] The lens actuator (10) may include an OIS carrier (310). The OIS moving unit (300) may include the OIS carrier (310). The OIS carrier (310) may be a "bobbin." The OIS carrier (310) may be an "OIS holder." The OIS carrier (310) may be placed on the base (110). The OIS carrier (310) may be placed on the base (110). The OIS carrier (310) may be placed inside the AF carrier (210). The OIS carrier (310) may be placed on the AF carrier (210). The OIS carrier (310) may be placed inside the cover member. The OIS carrier (310) may be placed between the base (110) and the cover member.

[0087] The OIS carrier (310) may include a groove (311). The groove (311) may be an "OIS guide ball receiving groove." The groove (311) may be formed on the lower surface of the OIS carrier (310). The groove (311) may be formed concavely on the lower surface of the OIS carrier (310). Alternatively, the groove (311) may be formed by a rib protruding in a square ring shape on the lower surface of the OIS carrier (310). An OIS guide ball (720) may be arranged in the groove (311). The OIS guide ball (720) may be brought into contact with the groove (311). The groove (311) may be brought into contact with the OIS guide ball (720) at one point. Alternatively, the groove (311) may be brought into contact with the OIS guide ball (720) at two points.

[0088] The OIS carrier (310) may include a lateral stopper. The lateral stopper may limit the lateral stroke of the OIS carrier (310). That is, when the OIS carrier (310) moves to its maximum, the lateral stopper of the OIS carrier (310) may contact at least one of the AF carrier (210) and the base (110). The lateral stopper may be formed on the outer surface of the OIS carrier (310). The lateral stopper may protrude outward from the side surface of the OIS carrier (310).

[0089] The OIS carrier (310) may include a mounting portion. The mounting portion may be a 'magnet mounting portion.' A magnet (510, 610) may be placed in the mounting portion. For example, the mounting portion may be formed as a groove.

[0090] 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 (400). The driving unit may include an OIS driving unit. The driving unit may include an OIS-x driving unit (500). The driving unit may include an OIS-y driving unit (600). The driving unit may include a coil and a magnet.

[0091] The lens driving device (10) may include an AF driving unit (400). The AF driving unit (400) may move the AF moving unit (200) in the optical axis direction. The AF driving unit (400) may move the AF carrier (210) in the optical axis direction. The AF driving unit (400) may move the AF carrier (210) in the optical axis direction through electromagnetic force. The AF driving unit (400) may include a coil and a magnet.

[0092] The lens driving device (10) may include an AF magnet (410) and an AF coil (420) that move the AF moving unit (200) in the optical axis direction. The lens driving device (10) may include an AF magnet (410) and an AF coil (420) that move the AF carrier (210) in the optical axis direction.

[0093] In this embodiment, the AF carrier (210) and the OIS carrier (310) can move in the optical axis direction as one unit through the interaction between the AF coil (420) and the AF magnet (410).

[0094] The lens driving device (10) may include an AF magnet (410). The AF driving unit (400) may include an AF magnet (410). The AF magnet (410) may be an 'AF magnet'. The AF magnet (410) may be a permanent magnet. The AF magnet (410) may be arranged in the AF moving unit (200). The AF magnet (410) may be arranged in the AF carrier (210). The AF magnet (410) may be arranged in a cover member. The AF magnet (410) may be arranged in the base (110). The AF magnet (410) may be arranged on the base (110). The AF magnet (410) may be fixed to the AF carrier (210). The AF magnet (410) can be coupled to the AF carrier (210). The AF magnet (410) can be bonded to the AF carrier (210) with an adhesive.

[0095] The AF magnet (410) can interact with the AF coil (420). The AF magnet (410) can electromagnetically interact with the AF coil (420). The AF magnet (410) can be positioned corresponding to the AF coil (420). The AF magnet (410) can face the AF coil (420). The AF magnet (410) can be positioned opposite the AF coil (420). The AF magnet (410) can overlap the AF coil (420) in a direction perpendicular to the optical axis.

[0096] The AF magnet (410) may be a two-pole magnet. For example, the upper part of the AF magnet (410) may be a N pole and the lower part may be a S pole. Alternatively, the AF magnet (410) may be a four-pole magnet. The AF magnet (410) may include a four-pole magnetizing magnet. The AF magnet (410) may include a first magnet portion including a N pole and a S pole, and a second magnet portion including a N pole and a S pole. The first magnet portion and the second magnet portion may be arranged vertically. The first magnet portion and the second magnet portion may be spaced apart from each other in the vertical direction, and a neutral portion may be arranged between the first magnet portion and the second magnet portion.

[0097] The lens driving device (10) may include an AF coil (420). The AF driving unit (400) may include the AF coil (420). The AF coil (420) may interact with the AF magnet (410). The AF coil (420) may face the AF magnet (410). The AF coil (420) may be positioned at a position corresponding to the AF magnet (410). The AF coil (420) may overlap the AF magnet (410) in a direction perpendicular to the optical axis. The AF coil (420) may be positioned on the substrate (120). The AF coil (420) may be positioned on the base (110). The AF coil (420) may be positioned on the fixing member (100). The AF coil (420) can be placed on the cover member.

[0098] The lens driving device (10) may include an AF sensor (430). The AF driving unit (400) may include an AF sensor (430). The AF sensor (430) may be a Hall sensor. The AF sensor (430) may be disposed on the substrate (120). The AF sensor (430) may detect the AF magnet (410). The AF sensor (430) may detect the movement of the AF magnet (410). The movement amount or position of the AF magnet (410) detected by the AF sensor (430) may be used for feedback of auto focus driving.

[0099] The AF sensor (430) may be a driver IC. 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 AF coil (420). The driver IC may supply current to the AF coil (420).

[0100] The lens driving device (10) may include an AF yoke (440). The AF driving unit (400) may include the AF yoke (440). The AF yoke (440) may be disposed on the substrate (120). The AF yoke (440) may be disposed on the outer surface of the substrate (120). The yoke (440) may be disposed on the base (110). The yoke (440) may be disposed on a side plate of the cover member. An attractive force may be applied between the AF magnet (410) and the AF yoke (440). The AF guide ball (710) may be pressed between the base (110) and the AF carrier (210) by the attractive force between the AF magnet (410) and the AF yoke (440).

[0101] The lens driving device (10) may include an OIS driving unit. The OIS driving unit may move the OIS moving unit (300) in a direction perpendicular to the optical axis. The OIS driving unit may move the OIS carrier (310) in a direction perpendicular to the optical axis. The OIS driving unit may move the OIS carrier (310) in a direction perpendicular to the optical axis. The OIS driving unit may move the OIS carrier (310) in a direction perpendicular to the optical axis through electromagnetic force.

[0102] The lens driving device (10) may include an OIS-x driving unit (500). The OIS driving unit may include an OIS-x driving unit (500). The OIS-x driving unit (500) may move the OIS carrier (310) in the x-axis direction perpendicular to the optical axis. The OIS-x driving unit (500) may move the OIS carrier (310) in the x-axis direction perpendicular to the optical axis through electromagnetic force. The OIS-x driving unit (500) may include a coil and a magnet.

[0103] The lens driving device (10) may include an OIS-x magnet (510) and an OIS-x coil (520) that move the OIS moving unit (300) in the x-axis direction perpendicular to the optical axis direction. The lens driving device (10) may include an OIS-x magnet (510) and an OIS-x coil (520) that move the OIS carrier (310) in the x-axis direction perpendicular to the optical axis direction.

[0104] In this embodiment, the OIS-x magnet (510) and the OIS-x coil (520) can move the OIS moving part (300) in a first direction perpendicular to the optical axis direction. At this time, the first direction may be the x-axis direction. The OIS carrier (310) can move in the x-axis direction perpendicular to the optical axis direction by the interaction between the OIS-x coil (520) and the OIS-x magnet (510). The OIS-x magnet (510) and the OIS carrier (310) can move in the x-axis direction as one unit.

[0105] The lens driving device (10) may include an OIS-x magnet (510). The OIS driving unit may include an OIS-x magnet (510). The OIS-x magnet (510) may be an 'OIS-x magnet'. The OIS-x magnet (510) may be a permanent magnet. The OIS-x magnet (510) may be arranged in the OIS moving unit (300). The OIS-x magnet (510) may be spaced apart from the AF magnet (410). The OIS-x magnet (510) may be arranged in the OIS carrier (310). The OIS-x magnet (510) may be arranged on the outer surface of the OIS carrier (310). The OIS-x magnet (510) may be fixed to the OIS carrier (310). The OIS-x magnet (510) can be coupled to the OIS carrier (310). The OIS-x magnet (510) can be bonded to the OIS carrier (310) with an adhesive. The OIS-x magnet (510) can be placed within the cover member.

[0106] The OIS-x magnet (510) can interact with the OIS-x coil (520). The OIS-x magnet (510) can electromagnetically interact with the OIS-x coil (520). The OIS-x magnet (510) can be positioned corresponding to the OIS-x coil (520). The OIS-x magnet (510) can face the OIS-x coil (520). The OIS-x magnet (510) can face the OIS-x coil (520). The OIS-x magnet (510) can overlap the OIS-x coil (520) in a direction perpendicular to the optical axis. The OIS-x magnet (510) can overlap the OIS-x coil (520) in the x-axis direction. The OIS-x magnet (510) can move in the x-axis direction perpendicular to the optical axis. The OIS-x magnet (510) can move in the pushing and pulling direction with the OIS-x coil (520) through interaction with the OIS-x coil (520).

[0107] The OIS-x magnet (510) may include multiple magnets. The OIS-x magnet (510) may include two magnets. The OIS-x magnet (510) may include a first magnet (511) and a second magnet (512).

[0108] The first magnet (511) can interact with the first coil (521). The first magnet (511) can electromagnetically interact with the first coil (521). The first magnet (511) can face the first coil (521). The first magnet (511) can be positioned corresponding to the first coil (521).

[0109] The second magnet (512) can interact with the second coil (522). The second magnet (512) can electromagnetically interact with the second coil (522). The second magnet (512) can face the second coil (522). The second magnet (512) can be positioned corresponding to the second coil (522).

[0110] For example, the first magnet (511) may be a north pole. The second magnet (512) may be a south pole. The first magnet (511) and the second magnet (512) may form a single magnet. Alternatively, in the modified example illustrated in FIG. 16, the first magnet (511a) may be a two-pole magnet having a south pole on the outer surface and a north pole on the inner surface. The second magnet (512a) may be a two-pole magnet having a south pole on the outer surface and a north pole on the inner surface. However, the polarity arrangement may be changed at this time.

[0111] The lens actuator (10) may include an OIS-x coil (520). The OIS actuator may include an OIS-x coil (520). The OIS-x coil (520) may interact with an OIS-x magnet (510). The OIS-x coil (520) may move the OIS-x magnet (510) in the x-axis direction perpendicular to the optical axis. The OIS-x coil (520) may move the OIS-x magnet (510) in the x-axis direction through interaction with the OIS-x magnet (510). The OIS-x coil (520) may face the OIS-x magnet (510). The OIS-x coil (520) may face the OIS-x magnet (510). The OIS-x coil (520) may be positioned corresponding to the OIS-x magnet (510). The OIS-x coil (520) may overlap the OIS-x magnet (510) in a direction perpendicular to the optical axis. The OIS-x coil (520) may be positioned on the substrate (120). The OIS-x coil (520) may be positioned on the base (110).

[0112] When current is applied to the OIS-x coil (520), the OIS-x magnet (510) can move away from or closer to the OIS-x coil (520) in the x-axis direction.

[0113] The OIS-x coil (520) may include multiple coils. The OIS-x coil (520) may include two coils. The OIS-x coil (520) may include two individually controlled coils. The OIS-x coil (520) may include two electrically separated coils. The OIS-x coil (520) may include a first coil (521) and a second coil (522). The OIS-x coil (520) may include a first coil (521) controlled by a detection value of a first sensor (531). The OIS-x coil (520) may include a second coil (522) controlled by a detection value of a second sensor (532).

[0114] The lens driving device (10) may include an OIS-x sensor (530). The OIS driving unit may include an OIS-x sensor (530). The OIS-x sensor (530) may be disposed on a substrate (120). The OIS-x sensor (530) may include a Hall sensor. The OIS-x sensor (530) may detect an OIS-x magnet (510). The OIS-x sensor (530) may detect the magnetic force of the OIS-x magnet (510). The OIS-x sensor (530) may overlap with the OIS-x magnet (510) in the x-axis direction. The OIS-x sensor (530) may be disposed within the OIS-x coil (520). The OIS-x sensor (530) may overlap with the OIS-x coil (520) in the optical axis direction. The OIS-x sensor (530) may overlap with the OIS-x coil (520) in the y-axis direction. The OIS-x sensor (530) may face the OIS-x magnet (510). The OIS-x sensor (530) may be positioned at a position corresponding to the OIS-x magnet (510). The OIS-x sensor (530) may detect movement of the OIS-x magnet (510). The movement amount or position of the OIS-x magnet (510) detected by the OIS-x sensor (530) may be used for feedback of the shake correction drive in the x-axis direction.

[0115] The OIS-x sensor (530) may include multiple sensors. The OIS-x sensor (530) may include two sensors. The OIS-x sensor (530) may include a first sensor (531) and a second sensor (532).

[0116] The first sensor (531) can detect the first magnet (511). The first sensor (531) can be placed within the first coil (521). The second sensor (532) can detect the second magnet (512). The second sensor (532) can be placed within the second coil (522).

[0117] The lens driving device (10) may include an OIS-x yoke (540). The OIS driving unit may include the OIS-x yoke (540). The OIS-x yoke (540) may have an attractive force with the OIS-x magnet (510). The OIS-x yoke (540) may face the OIS-x magnet (510). The OIS-x yoke (540) may be positioned corresponding to the OIS-x magnet (510). The OIS-x yoke (540) may be positioned on the AF carrier (210).

[0118] The OIS-x yoke (540) may include multiple yokes. The OIS-x yoke (540) may include two yokes. The OIS-x yoke (540) may include a first yoke (541) and a second yoke (542). The first yoke (541) may be attracted to the first magnet (511). The second yoke (542) may be attracted to the second magnet (512).

[0119] The lens driving device (10) may include an OIS-y driving unit (600). The OIS driving unit may include an OIS-y driving unit (600). The OIS-y driving unit (600) may move the OIS carrier (310) in the y-axis direction perpendicular to both the optical axis and the x-axis direction. The OIS-y driving unit (600) may move the OIS carrier (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 (600) may include a coil and a magnet.

[0120] The lens driving device (10) may include an OIS-y magnet (610) and an OIS-y coil (620) that move the OIS moving unit (300) in the y-axis direction perpendicular to the optical axis direction and the x-axis direction. The lens driving device (10) may include an OIS-y magnet (610) and an OIS-y coil (620) that move the OIS carrier (310) in the y-axis direction perpendicular to the optical axis direction and the x-axis direction.

[0121] In this embodiment, the OIS-y magnet (610) and the OIS-y coil (620) can move the OIS moving unit (300) in a second direction perpendicular to the optical axis direction and the first direction. At this time, the second direction may be the y-axis direction. By the interaction of the OIS-y coil (620) and the OIS-y magnet (610), the OIS carrier (310) can move in the y-axis direction perpendicular to both the optical axis direction and the x-axis direction. The OIS-y magnet (610) and the OIS carrier (310) can move integrally in the y-axis direction. The OIS-y magnet (610) can overlap with the AF magnet (410) in the second direction. The OIS-y magnet (610) can overlap with the AF magnet (410) in the y-axis direction.

[0122] The lens driving device (10) may include an OIS-y magnet (610). The OIS-y driving unit (600) may include an OIS-y magnet (610). The OIS-y magnet (610) may be an 'OIS-y magnet'. The OIS-y magnet (610) may be a permanent magnet. The OIS-y magnet (610) may be arranged in the OIS moving unit (300). The OIS-y magnet (610) may be spaced apart from the OIS-x magnet (510). The OIS-y magnet (610) may be spaced apart from the AF magnet (410). The OIS-y magnet (610) may be arranged in the OIS carrier (310). The OIS-y magnet (610) may be placed on the outer surface of the OIS carrier (310). The OIS-y magnet (610) may be fixed to the OIS carrier (310). The OIS-y magnet (610) may be coupled to the OIS carrier (310). The OIS-y magnet (610) may be bonded to the OIS carrier (310) with an adhesive. The OIS-y magnet (610) may be placed inside the cover member.

[0123] The OIS-y magnet (610) can interact with the OIS-y coil (620). The OIS-y magnet (610) can electromagnetically interact with the OIS-y coil (620). The OIS-y magnet (610) can be positioned corresponding to the OIS-y coil (620). The OIS-y magnet (610) can face the OIS-y coil (620). The OIS-y magnet (610) can face the OIS-y coil (620). The OIS-y magnet (610) can overlap the OIS-y coil (620) in a direction perpendicular to the optical axis. The OIS-y magnet (610) can overlap the OIS-y coil (620) in the y-axis direction. The OIS-y magnet (610) can move in the y-axis direction.

[0124] The OIS-y magnet (610) can move in the pushing and pulling direction with the OIS-y coil (620) through interaction with the OIS-y coil (620).

[0125] The OIS-y magnet (610) may include multiple magnets. The OIS-y magnet (610) may include two magnets. The OIS-y magnet (610) may include a first magnet (611) and a second magnet (612).

[0126] The first magnet (611) can interact with the first coil (621). The first magnet (611) can electromagnetically interact with the first coil (621). The first magnet (611) can face the first coil (621). The first magnet (611) can be positioned corresponding to the first coil (621).

[0127] The second magnet (612) can interact with the second coil (622). The second magnet (612) can electromagnetically interact with the second coil (622). The second magnet (612) can face the second coil (622). The second magnet (612) can be positioned corresponding to the second coil (622).

[0128] For example, the first magnet (611) may be a north pole. The second magnet (612) may be a south pole. The first magnet (611) and the second magnet (612) may form a single magnet. Alternatively, in the modified example illustrated in FIG. 16, the first magnet (611a) may be a two-pole magnet having a south pole on the outer surface and a north pole on the inner surface. The second magnet (612a) may be a two-pole magnet having a south pole on the outer surface and a north pole on the inner surface. However, the polarity arrangement may be changed at this time.

[0129] The lens actuator (10) may include an OIS-y coil (620). The OIS-y actuator (600) may include the OIS-y coil (620). The OIS-y coil (620) may interact with the OIS-y magnet (610). The OIS-y coil (620) may be arranged on the opposite side of the AF coil (420) with respect to the optical axis. The OIS-y coil (620) may move the OIS-y magnet (610) in the y-axis direction, which is perpendicular to both the optical axis and the x-axis. The OIS-y coil (620) may move the OIS-y magnet (610) in the y-axis direction through interaction with the OIS-y magnet (610). The OIS-y coil (620) may face the OIS-y magnet (610). The OIS-y coil (620) may face the OIS-y magnet (610). The OIS-y coil (620) may be positioned corresponding to the OIS-y magnet (610). The OIS-y coil (620) may overlap the OIS-y magnet (610) in a direction perpendicular to the optical axis. The OIS-y coil (620) may be positioned on the substrate (120).

[0130] When current is applied to the OIS-y coil (620), the OIS-y magnet (610) can move away from or closer to the OIS-y coil (620) in the y-axis direction.

[0131] The OIS-y coil (620) may include a plurality of coils. The OIS-y coil (620) may include two coils. The OIS-y coil (620) may include two individually controlled coils. The OIS-y coil (620) may include two electrically separated coils. The OIS-y coil (620) may include a first coil (621) and a second coil (622). The OIS-y coil (620) may include a first coil (621) controlled by a detection value of a first sensor (631). The OIS-y coil (620) may include a second coil (622) controlled by a detection value of a second sensor (632).

[0132] The lens driving device (10) may include an OIS-y sensor (630). The OIS-y driving unit (600) may include the OIS-y sensor (630). The OIS-y sensor (630) may be disposed on a substrate (120). The OIS-y sensor (630) may include a Hall sensor. The OIS-y sensor (630) may detect the OIS-y magnet (610). The OIS-y sensor (630) may detect the magnetic force of the OIS-y magnet (610). The OIS-y sensor (630) may overlap with the OIS-y magnet (610) in the y-axis direction. The OIS-y sensor (630) may be disposed within the OIS-y coil (620). The OIS-y sensor (630) may overlap with the OIS-y coil (620) in the optical axis direction. The OIS-y sensor (630) may overlap with the OIS-y coil (620) in the x-axis direction. The OIS-y sensor (630) may face the OIS-y magnet (610). The OIS-y sensor (630) may be positioned at a position corresponding to the OIS-y magnet (610). The OIS-y sensor (630) may detect the movement of the OIS-y magnet (610). The movement amount or position of the OIS-y magnet (610) detected by the OIS-y sensor (630) may be used for feedback of the shake correction drive in the y-axis direction.

[0133] The OIS-y sensor (630) may include multiple sensors. The OIS-y sensor (630) may include two sensors. The OIS-y sensor (630) may include a first sensor (631) and a second sensor (632).

[0134] The first sensor (631) can detect the first magnet (611). The first sensor (631) can be placed within the first coil (621). The second sensor (632) can detect the second magnet (612). The second sensor (632) can be placed within the second coil (622).

[0135] The lens driving device (10) may include an OIS-y yoke (640). The OIS driving unit may include the OIS-y yoke (640). The OIS-y yoke (640) may have an attractive force with the OIS-y magnet (610). The OIS-y yoke (640) may face the OIS-y magnet (610). The OIS-y yoke (640) may be positioned corresponding to the OIS-y magnet (610). The OIS-y yoke (640) may be positioned on the AF carrier (210).

[0136] The OIS-y yoke (640) may include multiple yokes. The OIS-y yoke (640) may include two yokes. The OIS-y yoke (640) may include a first yoke (641) and a second yoke (642). The first yoke (641) may be subject to an attractive force with the first magnet (611). The second yoke (642) may be subject to an attractive force with the second magnet (612).

[0137] The lens actuator (10) may include a guide member. The guide member may guide the moving part to move in a specific direction relative to the fixed part.

[0138] The lens driving device (10) may include an AF guide ball (710). The guide member may include an AF guide ball (710). The AF guide ball (710) may guide movement of the AF moving unit (200) with respect to the fixed unit (100) in the optical axis direction. The AF guide ball (710) may guide movement of the AF carrier (210) with respect to the base (110) in the optical axis direction. The AF guide ball (710) may be arranged between the fixed unit (100) and the AF moving unit (200). The AF guide ball (710) may be arranged between the base (110) and the AF carrier (210). The AF guide ball (710) may be arranged between the base (110) and the AF carrier (210) in the y-axis direction. Alternatively, the AF guide ball (710) may be disposed between the base (110) and the AF carrier (210) in the x direction. The AF guide ball (710) may be disposed in the groove (111) of the base (110). The AF guide ball (710) may be disposed in the groove (211) of the AF carrier (210). The AF guide ball (710) may be disposed between the groove (111) of the base (110) and the groove (211) of the AF carrier (210). The AF guide ball (710) may be spherical. The AF guide ball (710) may be formed of metal. Grease may be applied to the surface of the AF guide ball (710).

[0139] The AF guide ball (710) can move along a rail formed between the base (110) and the AF carrier (210). The rail can be formed by grooves (111, 211). The AF guide ball (710) can move along a rail formed in the optical axis direction between the base (110) and the AF carrier (210). The rail can be formed in the optical axis direction. A protrusion of the AF carrier (210) can be arranged on the upper side of the rail. Through this, the phenomenon of the AF guide ball (710) being separated upward from the rail can be prevented.

[0140] The AF guide ball (710) may include a first ball having a first diameter and a second ball having a second diameter smaller than the first diameter. That is, the diameter of the second ball may be smaller than the diameter of the first ball. The AF guide ball (710) may include balls having different diameters.

[0141] The lens actuator (10) may include an OIS guide ball (720). The OIS guide ball (720) may guide the movement of the OIS carrier (310) relative to the AF carrier (210) in a direction perpendicular to the optical axis. The OIS guide ball (720) may be arranged between the AF moving unit (200) and the OIS moving unit (300). The OIS guide ball (720) may be arranged between the AF carrier (210) and the OIS carrier (310). The OIS guide ball (720) may be arranged between the AF carrier (210) and the OIS carrier (310) in the optical axis direction. The OIS guide ball (720) may be arranged in a groove (212) of the AF carrier (210). The OIS guide ball (720) may be arranged in a groove (311) of the OIS carrier (310). The OIS guide ball (720) can be placed between the groove (212) of the AF carrier (210) and the groove (311) of the OIS carrier (310).

[0142] The OIS guide ball (720) can guide the OIS moving unit (300) to move in the x-axis direction and the y-axis direction. The OIS guide ball (720) can guide the movement of the OIS moving unit (300) in the x-axis direction and the y-axis direction. The OIS guide ball (720) can guide the OIS carrier (310) to move in the x-axis direction and the y-axis direction which are perpendicular to the optical axis direction with respect to the AF carrier (210). That is, the OIS guide ball (720) can guide the OIS carrier (310) to move in the x-axis direction and the y-axis direction. In other words, the OIS guide ball (720) can guide the movement in both the x-axis direction and the y-axis direction. For reference, compared to a comparative example in which a ball guiding the x-axis direction and a ball guiding the y-axis direction are separately provided, the size of the lens driving device (10) can be minimized in this embodiment in which the ball guiding the x-axis direction and the ball guiding the y-axis direction are integrally provided. In particular, the height of the lens driving device (10) in the optical axis direction can be reduced. Through this, the height protruding from the smartphone, i.e., the shoulder height, can be minimized.

[0143] The OIS guide ball (720) may include multiple balls. The OIS guide ball (720) may include four balls. The OIS guide ball (720) may include first to fourth balls (721, 722, 723, 724). Each of the first to fourth balls (721, 722, 723, 724) may contact one of the AF carrier (210) and the OIS carrier (310) at three or more points.

[0144] The OIS guide ball (720) can contact one of the AF carrier (210) and the OIS carrier (310) at three or more points. The OIS guide ball (720) can contact the other of the AF carrier (210) and the OIS carrier (310) at one point. Alternatively, the OIS guide ball (720) can contact the other of the AF carrier (210) and the OIS carrier (310) at two points. The OIS guide ball (720) can contact the other of the AF carrier (210) and the OIS carrier (310) at one point in an initial position where no current is applied to the coil, and can contact the other of the AF carrier (210) and the OIS carrier (310) at two points when current is applied to the coil and moves to the maximum in the x-axis direction or the y-axis direction.

[0145] The OIS guide ball (720) can contact the AF carrier (210) at four points. At this time, the OIS guide ball (720) can contact the OIS carrier (310) at one or two points. As a variation, the OIS guide ball (720) can contact the OIS carrier (210) at four points. At this time, the OIS guide ball (720) can contact the AF carrier (210) at one or two points. The OIS guide ball (720) can move in a cloud. The OIS guide ball (720) can rotate.

[0146] Alternatively, the OIS guide ball (720) may be fixed with an adhesive to either the AF carrier (210) or the OIS carrier (310). The OIS guide ball (720) may slide relative to the other of the AF carrier (210) or the OIS carrier (310).

[0147] In another variation, one of the AF carrier (210) and the OIS carrier (310) may include a hemispherical protrusion that contacts a groove of the other of the AF carrier (210) and the OIS carrier (310). In this case, the protrusion may slide along the groove.

[0148] The lens driving device (10) may include a ball pressurizing member. The ball pressurizing member may pressurize the ball to prevent the ball from being detached. The ball pressurizing member may press the ball against an object. The ball pressurizing member may include a yoke on which a magnet and an attractive force act. The ball (710, 720) may be pressed by the attractive force between the magnet (410, 510, 610) and the yoke (440, 540, 640). The AF guide ball (710) may be pressed by the attractive force between the AF magnet (410) and the AF yoke (440). The OIS guide ball (720) may be pressed by the attractive force between the OIS-x magnet (510) and the OIS-x yoke (540) and the attractive force between the OIS-y magnet (610) and the OIS-y yoke (640).

[0149]

[0150] Below, the auto focus (AF) operation of the lens driving device according to the present embodiment is described.

[0151] Fig. 17 is a drawing for explaining the AF operation of the lens driving device according to the present embodiment.

[0152] The moving part may be positioned at a position spaced apart from both the upper plate and the base (110) of the cover member at an initial position where no current is applied to the AF coil (420). At this time, the moving part may include an AF moving part (200). The moving part may include an AF carrier (210). The moving part may include an OIS moving part (300). The moving part may include a lens. Furthermore, the moving part may include an AF carrier (210), an OIS carrier (310), and a lens.

[0153] When current is applied to the AF coil (420), the AF moving part (see A in FIG. 17) can move upward or downward along the optical axis (see B in FIG. 17).

[0154] When a positive current is applied to the AF coil (420), the AF magnet (410) can move upward in the optical axis direction due to the electromagnetic interaction between the AF coil (420) and the AF magnet (410). At this time, the AF carrier (210) can move upward in the optical axis direction together with the AF magnet (410). Furthermore, the OIS carrier (310) and the lens can move upward in the optical axis direction together with the AF carrier (210). Accordingly, the distance between the lens and the image sensor (60) can be changed, so that the focus of the image formed on the image sensor (60) through the lens can be adjusted.

[0155] When a reverse current is applied to the AF coil (420), the AF magnet (410) can move downward in the optical axis direction due to the electromagnetic interaction between the AF coil (420) and the AF magnet (410). At this time, the AF carrier (210) can move downward in the optical axis direction together with the AF magnet (410). Furthermore, the OIS carrier (310) and the lens can move downward in the optical axis direction together with the AF carrier (210). Accordingly, the distance between the lens and the image sensor (60) can be changed, so that the focus of the image formed on the image sensor (60) through the lens can be adjusted.

[0156]

[0157] Below, the optical image stabilization (OIS) operation of the lens driving device according to the present embodiment is described.

[0158] Fig. 18 is a drawing for explaining OIS operation of a lens driving device according to the present embodiment.

[0159] The moving part can be placed in the initial position without current being applied to the OIS-x coil (520) and the OIS-y coil (620). At this time, the moving part can include an OIS moving part (300). The moving part can include an OIS carrier (310). The moving part can include a lens.

[0160] When current is applied to the OIS-x coil (520), the moving part (see A in FIG. 18) can move in the x-axis direction (see B in FIG. 18).

[0161] When current is applied to the OIS-x coil (520), the OIS-x magnet (510) can move in the x-axis direction perpendicular to the optical axis due to the electromagnetic interaction between the OIS-x coil (520) and the OIS-x magnet (510). At this time, the OIS carrier (310) can move in the x-axis direction together with the OIS-x magnet (510). Furthermore, the lens can move in the x-axis direction together with the OIS carrier (310). More specifically, when a positive current is applied to the OIS-x coil (520), the OIS-x magnet (510), the OIS carrier (310), and the lens can move in one direction on the x-axis. Additionally, when reverse current is applied to the OIS-x coil (520), the OIS-x magnet (510), the OIS carrier (310), and the lens can move in the other direction along the x-axis.

[0162] When current is applied to the OIS-y coil (620), the moving part (see A in Fig. 18) can move in the y-axis direction (see C in Fig. 18).

[0163] When current is applied to the OIS-y coil (620), the OIS-y magnet (610) can move in the y-axis direction perpendicular to the optical axis due to the electromagnetic interaction between the OIS-y coil (620) and the OIS-y magnet (610). At this time, the OIS carrier (310) can move in the y-axis direction together with the OIS-y magnet (610). Furthermore, the lens can move in the y-axis direction together with the OIS carrier (310). More specifically, when a positive current is applied to the OIS-y coil (620), the OIS-y magnet (610), the OIS carrier (310), and the lens can move in one direction along the y-axis. Additionally, when a reverse current is applied to the OIS-y coil (620), the OIS-y magnet (610), the OIS carrier (310), and the lens can move in the other direction along the y-axis.

[0164] Meanwhile, the OIS-x sensor (530) can detect the strength of the magnetic field of the OIS-x magnet (510) to detect the amount of movement or position of the OIS-x magnet (510). The amount of movement or position detected by the OIS-x sensor (530) can be used for x-axis direction shake correction feedback control. The OIS-y sensor (630) can detect the strength of the magnetic field of the OIS-y magnet (610) to detect the amount of movement or position of the OIS-y magnet (610). The amount of movement or position detected by the OIS-y sensor (630) can be used for y-axis direction shake correction feedback control.

[0165] Furthermore, in the present embodiment, crosstalk can be prevented by controlling the first coil (521) of the OIS-x coil (520) by the detection value of the first sensor (531) of the OIS-x sensor (530) and controlling the second coil (522) of the OIS-x coil (520) by the detection value of the second sensor (532) of the OIS-x sensor (530). In more detail, when applying current to the OIS-x coil (520), the phenomenon of the moving part moving or rotating in the y-axis direction can be prevented.

[0166] In addition, in the present embodiment, crosstalk can be prevented by controlling the first coil (621) of the OIS-y coil (620) by the detection value of the first sensor (631) of the OIS-y sensor (630) and controlling the second coil (622) of the OIS-y coil (620) by the detection value of the second sensor (632) of the OIS-y sensor (630). In more detail, when applying current to the OIS-y coil (620), the phenomenon of the moving part moving or rotating in the x-axis direction can be prevented.

[0167]

[0168] Below, a camera device according to the present embodiment is described with reference to the drawings.

[0169] Fig. 19 is an exploded perspective view of a camera device according to the present embodiment.

[0170] The camera device (10A) may include a camera module.

[0171] 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 the OIS carrier (310) of the lens driving device (10). The lens module (20) may be coupled to the OIS carrier (310) by screw coupling and / or adhesive. The lens module (20) may move integrally with the OIS carrier (310).

[0172] 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).

[0173] 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.

[0174] 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.

[0175] 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 to 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.

[0176] 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.

[0177] 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).

[0178] 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.

[0179]

[0180] Below, an optical device according to the present embodiment is described with reference to the drawings.

[0181] Fig. 20 is a perspective view of an optical device according to the present embodiment. Fig. 21 is a perspective view of an optical device according to a modified example.

[0182] 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.

[0183] 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. 20, the camera device (10A) may have a triple camera positioned vertically. As illustrated in FIG. 21, 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.

[0184]

[0185] 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. Base; A first carrier disposed within the base; A second carrier arranged within the first carrier; A first coil and a first magnet that move the first carrier in the optical axis direction; A second coil and a second magnet that move the second carrier in a first direction perpendicular to the optical axis direction; A third coil and a third magnet that move the second carrier in a second direction perpendicular to the optical axis direction and the first direction; and Including a ball placed between the first carrier and the second carrier, The second coil comprises two individually controlled coils, A lens actuator in which the ball contacts one of the first carrier and the second carrier at three or more points.

2. In paragraph 1, A lens actuator in which the ball contacts the other of the first carrier and the second carrier at one point.

3. In paragraph 1, The above ball contains four balls, A lens actuator in which each of the four balls above contacts at three or more points with either the first carrier or the second carrier.

4. In paragraph 1, The above ball is a lens actuator that comes into contact with the first carrier at four points.

5. In paragraph 1, Including a second sensor that detects the second magnet, The second sensor includes a second-1 sensor and a second-2 sensor, A lens driving device including the above two coils, the 2-1 coil controlled by the detection value of the 2-1 sensor, and the 2-2 coil controlled by the detection value of the 2-2 sensor.

6. In paragraph 1, It includes a second-1 sensor and a second-2 sensor that detect the second magnet, The above two coils include the 2-1 coil and the 2-2 coil, The above 2-1 sensor is placed within the 2-1 coil, The above 2-2 sensor is a lens driving device arranged within the 2-2 coil.

7. In paragraph 1, The above third coil is a lens actuator including two individually controlled coils.

8. In paragraph 1, Including a third sensor that detects the third magnet, The third sensor includes a third-1 sensor and a third-2 sensor, A lens driving device including a 3-1 coil controlled by a detection value of the 3-1 sensor and a 3-2 coil controlled by a detection value of the 3-2 sensor.

9. In paragraph 1, A lens actuator in which the ball is fixed to one of the first carrier and the second carrier with an adhesive.

10. Base; A first carrier disposed within the base; A second carrier arranged within the first carrier; A first coil and a first magnet that move the first carrier in the optical axis direction; A second coil and a second magnet that move the second carrier in a first direction perpendicular to the optical axis direction; and It includes a third coil and a third magnet that move the second carrier in a second direction perpendicular to the optical axis direction and the first direction, The second coil comprises two individually controlled coils, A lens actuator, wherein one of the first carrier and the second carrier includes a hemispherical protrusion that contacts a groove of the other of the first carrier and the second carrier.

Images