Camera device and optical apparatus

Abstract

The present embodiment relates to a camera device comprising: a base; a holder arranged on the base; a driving unit for moving the holder in the optical axis direction with respect to the base; and balls disposed between the base and the holder, wherein the base includes a groove-shaped rail extending in the optical axis direction, the balls include a first ball and a second ball disposed on the rail of the base, and the base includes a first protrusion protruding from the rail of the base, and the first protrusion of the base is disposed between the first ball and the second ball in the optical axis direction, and the length of the first protrusion in a direction perpendicular to the optical axis is greater than the radius of the second ball.

Description

Camera devices and optical instruments

[0001] The present embodiment relates to a camera device and an optical device.

[0002] Modern smartphones are equipped with cameras capable of taking high-resolution photos and videos.

[0003] In particular, recent smartphone cameras have been equipped with an autofocus function that automatically adjusts the focus according to the distance to the subject. The autofocus function can be performed by moving the lens along the optical axis with respect to the image sensor. Accordingly, the lens actuator may be equipped with balls that guide the movement of the moving part on which the lens is placed. At this time, to secure a gap between the actual moving balls, a space ball (gap-maintaining ball) with a smaller diameter than the driving balls may be placed between the driving balls. However, this increases the number of parts, and there is a risk of slipping between the balls and a risk of locking, which prevents the balls from rotating. This problem is particularly aggravated when designing a tall actuator, as a large number of space balls are required.

[0004] (Patent Document 1) KR 10-2020-0116402 A

[0005] The present embodiment aims to provide a camera device in which the risk of slipping and locking between balls is eliminated.

[0006] In addition, we aim to provide a camera device with a reduced number of parts due to the omission of space balls.

[0007] A camera device according to the present embodiment comprises: a base; a holder disposed on the base; a driving unit for moving the holder relative to the base in the direction of an optical axis; and a ball disposed between the base and the holder, wherein the base comprises a groove-shaped rail extending in the direction of the optical axis, the balls include a first ball and a second ball disposed on the rail of the base, the base includes a first protrusion formed to protrude from the rail of the base, the first protrusion of the base is disposed between the first ball and the second ball in the direction of the optical axis, and a length of the first protrusion in a direction perpendicular to the optical axis may be greater than a radius of the second ball.

[0008] The holder includes a groove-shaped rail extending in the optical axis direction, and a second protrusion formed protruding from the rail of the holder, and the second protrusion of the holder can be arranged between the first ball and the first protrusion of the base in the optical axis direction.

[0009] When the holder is moved to the maximum upward direction in the optical axis direction, the first protrusion of the base and the second protrusion of the holder can be spaced apart from each other.

[0010] The base includes a third protrusion, and the first ball can be positioned between the third protrusion of the base and the second protrusion of the holder in the direction of the optical axis.

[0011] The holder includes a fourth protrusion, and the second ball can be positioned between the first protrusion of the base and the fourth protrusion of the holder in the direction of the optical axis.

[0012] When the holder is moved by the driving unit, the ball can move along the rail of the base.

[0013] The second protrusion of the holder may overlap the first protrusion of the base in the direction of the optical axis.

[0014] The length of the first protrusion of the base in the optical axis direction may be greater than the diameter of the second ball.

[0015] The length of the second protrusion of the holder in the optical axis direction may be greater than the diameter of the first ball.

[0016] The diameter of the first ball and the diameter of the second ball may be the same.

[0017] The driving unit includes a magnet disposed on the holder and a coil interacting with the magnet, the rail of the holder includes a first rail disposed on one side of the magnet and a second rail disposed on the other side of the magnet, the first ball and the second ball may be disposed on the first rail, and the balls may include a third ball and a fourth ball disposed on the second rail.

[0018] The base includes a fifth protrusion disposed between the third ball and the fourth ball in the optical axis direction, and a length of the fifth protrusion of the base in the optical axis direction may be shorter than a length of the first protrusion of the base.

[0019] The rail of the above base includes an upper rail arranged above the first protrusion and a lower rail arranged below the first protrusion, and the length of the upper rail in the optical axis direction may be different from the length of the lower rail in the optical axis direction.

[0020] The camera device may include a printed circuit board; an image sensor disposed on the printed circuit board; and a lens coupled to the holder.

[0021] A camera device according to the present embodiment comprises: a base; a holder disposed on the base; a driving unit for moving the holder relative to the base; and a ball disposed between the base and the holder, wherein the base comprises a groove-shaped rail, and the balls comprise a first ball and a second ball disposed on the rail of the base, wherein the base comprises a first protrusion formed to protrude from the rail of the base, and the first protrusion of the base is disposed between the first ball and the second ball, and the holder comprises a groove-shaped rail on which the first ball and the second ball are disposed, and a second protrusion formed to protrude from the rail of the holder, and the second protrusion of the holder can be disposed between the first ball and the second ball.

[0022] 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.

[0023] This embodiment eliminates the risk of slipping and locking between balls. Consequently, the stability of autofocus operation can be improved.

[0024] Additionally, the number of parts is reduced by omitting the space ball, making assembly easier and reducing manufacturing costs.

[0025] Fig. 1 is a perspective view of a lens driving device according to the present embodiment.

[0026] Figure 2 is a cross-sectional view taken along line AA of Figure 1.

[0027] Figure 3 is a cross-sectional view viewed from BB in Figure 1.

[0028] Fig. 4a (a) is a cross-sectional view showing the arrangement structure of the ball and the related components when the holder has moved to the lowest end in the direction of the optical axis, and Fig. 4a (b) is a cross-sectional view showing the arrangement structure of the ball and the related components when the holder has moved to the highest end in the direction of the optical axis.

[0029] Fig. 4b is a cross-sectional view for explaining the arrangement structure of the ball and rail of the lens driving device according to the present embodiment.

[0030] Fig. 5 is a cross-sectional view showing the arrangement structure of the ball and related components of the lens driving device according to the present embodiment.

[0031] Fig. 6 is an exploded perspective view of a lens driving device according to the present embodiment.

[0032] Fig. 7 is an exploded perspective view of the lens drive device viewed from a different direction than Fig. 6.

[0033] Fig. 8 is a perspective view of a lens driving device according to the present embodiment with the cover omitted.

[0034] Fig. 9 is a perspective view showing a fixing part and related configuration of a lens driving device according to the present embodiment.

[0035] Fig. 10 is a perspective view showing the moving part and related configuration of the lens driving device according to the present embodiment.

[0036] Fig. 11 is a perspective view showing the fixing part and related configuration of a lens driving device according to a modified example.

[0037] Fig. 12 is a perspective view showing the moving part and related configuration of a lens driving device according to a modified example.

[0038] Fig. 13 is a cross-sectional view showing the arrangement structure of the ball and related components of the lens driving device according to a modified example.

[0039] Fig. 14 is a drawing for explaining auto focus driving of a lens driving device according to the present embodiment.

[0040] Fig. 15 is an exploded perspective view of a camera device according to the present embodiment.

[0041] Fig. 16 is a perspective view of an optical device according to the present embodiment.

[0042] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] The 'optical axis direction (see OA in Fig. 14)' used below is defined as the optical axis direction of the lens and / or image sensor coupled to the lens driving device.

[0051] 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'.

[0052] The 'auto focus (AF) function' used below is defined as a function that automatically focuses on a subject by adjusting the distance from the image sensor by moving the lens in the direction of the optical axis according to the distance of the subject so that a clear image of the subject can be obtained on the image sensor. In addition, 'closed-loop auto focus (CLAF) control' is defined as a function that detects the distance between the image sensor and the lens and provides feedback control of the position of the lens in real time to improve the accuracy of focus adjustment.

[0053] Hereinafter, one of the “x-axis direction”, “y-axis direction”, and “optical axis direction” may be referred to as the “first direction”, the other may be referred to as the “second direction”, and the other may be referred to as the “third direction”.

[0054]

[0055] Below, the configuration of the lens driving device according to the present embodiment is described with reference to the drawings.

[0056] 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. 4a (a) is a cross-sectional view showing the arrangement structure of balls and related components when the holder has moved to the lowest end in the direction of the optical axis, and Fig. 4a (b) is a cross-sectional view showing the arrangement structure of balls and related components when the holder has moved to the highest end in the direction of the optical axis. Fig. 4b is a cross-sectional view for explaining the arrangement structure of balls and rails of the lens driving device according to the present embodiment. Fig. 5 is a cross-sectional view showing the arrangement structure of balls and related components of the lens driving device according to the present embodiment. Fig. 6 is an exploded perspective view of the lens driving device according to the present embodiment. Fig. 7 is an exploded perspective view of the lens driving device seen from a different direction from Fig. 6. Fig. 8 is a perspective view of the lens driving device according to the present embodiment with a cover omitted. Fig. 9 is a perspective view illustrating a fixed part and related components of a lens driving device according to the present embodiment. Fig. 10 is a perspective view illustrating a moving part and related components of a lens driving device according to the present embodiment.

[0057] The lens driving device (10) may include a fixed part (100). The fixed part (100) may be a fixed member. The fixed part (100) may be a part that is relatively fixed when the moving part (200) moves. The fixed part (100) may be a part that is fixed when the auto focus is driven. The fixed part (100) may correspond to the image sensor (60) side, and the moving part (200) may correspond to the lens side.

[0058] The lens actuator (10) may include a base (110). The fixing member (100) may include the base (110). The base (110) may be a housing. The base (110) may accommodate a holder (210) therein. The base (110) may be disposed on the outside of the holder (210). The base (110) may be disposed below the holder (210). The base (110) may be coupled to a cover (120). The base (110) may be disposed within the cover (120). The base (110) may be disposed below the cover (120).

[0059] The base (110) may include a step portion. The step portion may be formed at the lower end of the outer surface of the base (110). The step portion may be formed by protruding the lower end of the outer surface of the base (110). A side plate (122) of the cover (120) may be placed on the step portion.

[0060] The base (110) may include a rail (111). The rail (111) may be a ball rail. A ball (400) may be placed on the rail (111). The rail (111) may be placed in the direction of the optical axis. The rail (111) may extend in the direction of the optical axis. The ball (400) may contact the rail (111). The ball (400) may move along the rail (111). The rail (111) may be formed in a groove shape. The rail (111) may be a groove.

[0061] The rail (111) may include a plurality of rails. The rail (111) may include a first rail (111-1) and a second rail (111-2). The rail (111) may include a first rail (111-1) corresponding to the first rail (211-1) of the holder (210), and a second rail (111-2) corresponding to the second rail (211-2) of the holder (210). The first ball (410) and the second ball (420) may be arranged on the first rail (111-1). The third ball (430) and the fourth ball (440) may be arranged on the second rail (111-2).

[0062] The first rail (111-1) may be a two-point contact rail. The first rail (111-1) may contact the ball (400) at two points. The ball (400) may contact two inclined surfaces of the first rail (111-1).

[0063] The second rail (111-2) may be a first-point contact rail. The second rail (111-2) may contact the ball (400) at one point. The ball (400) may contact the bottom surface of the second rail (111-2). The distance between the two inclined surfaces of the second rail (111-2) may be longer than the distance between the two inclined surfaces of the first rail (111-1).

[0064] Considering the assembly tolerance, at least one of the two rails (211-1, 211-2) on the holder (210) side and the two rails (111-1, 111-2) on the base (110) side can be formed in the form of a one-point contact groove. In the present embodiment, as illustrated in FIG. 9, the second rail (111-2) of the base (110) is a one-point contact groove, but in a modified example, any one of the two rails (211-1, 211-2) of the holder (210) can be a one-point contact rail.

[0065] The base (110) may include a first protrusion (112). The first protrusion (112) may be formed to protrude from the rail (111). The first protrusion (112) may be a guide. The first protrusion (112) may have a curved inner surface. The first protrusion (112) may be formed in a different shape from the second protrusion (212). The first protrusion (112) may support the second ball (420) from the lower side. The first protrusion (112) may support the fourth ball (440) from the lower side. The first protrusion (112) may be formed in a shape that does not interfere with the rail (211) of the holder (210).

[0066] The first protrusion (112) may be formed to protrude from the first rail (111-1). The first protrusion (112) may be arranged between the first ball (410) and the second ball (420). The first protrusion (112) may be arranged between the first ball (410) and the second ball (420) in the direction of the optical axis. The first protrusion (112) may be arranged between the second ball (420) and the second protrusion (212) of the holder (210). The first protrusion (112) may be arranged between the second ball (420) and the second protrusion (212) of the holder (210) in the direction of the optical axis.

[0067] The first protrusion (112) may be formed to protrude from the second rail (111-2). The first protrusion (112) may be arranged between the third ball (430) and the fourth ball (440). The first protrusion (112) may be arranged between the third ball (430) and the fourth ball (440) in the direction of the optical axis. The first protrusion (112) may be arranged between the fourth ball (440) and the second protrusion (212) of the holder (210). The first protrusion (112) may be arranged between the fourth ball (440) and the second protrusion (212) of the holder (210) in the direction of the optical axis.

[0068] The length of the first protrusion (112) of the base (110) in the optical axis direction may be greater than the diameter of the first ball (410). The length of the first protrusion (112) of the base (110) in the optical axis direction (see L1 of FIG. 3) may be greater than the diameter of the second ball (420) (see D1 of FIG. 3). In a variation, the length of the first protrusion (112) of the base (110) in the optical axis direction may be equal to the diameter of the first ball (410). In another variation, the length of the first protrusion (112) of the base (110) in the optical axis direction may be smaller than the diameter of the first ball (410).

[0069] The base (110) may include a third protrusion (113). The third protrusion (113) may support the lower end of the ball (400).

[0070] The third protrusion (113) may be formed at the lower end of the first rail (111-1). The third protrusion (113) may support the first ball (410). The third protrusion (113) may support the first ball (410) from below. The first ball (410) may be positioned between the third protrusion (113) of the base (110) and the second protrusion (212) of the holder (210) in the direction of the optical axis.

[0071] The third protrusion (113) may be formed at the lower end of the second rail (111-2). The third protrusion (113) may support the third ball (430). The third protrusion (113) may support the third ball (430) from below. The third ball (430) may be positioned between the third protrusion (113) of the base (110) and the second protrusion (212) of the holder (210) in the direction of the optical axis.

[0072] The base (110) may include a groove (117). The groove (117) may be formed by recessing the upper surface of the base (110). The groove (117) may be formed on a side wall of the base (110). A stopper (217) of the holder (210) may be placed in the groove (117). The groove (117) may be formed so that the stopper (217) of the holder (210) is caught in the groove (117) when the holder (210) moves downward or rotates.

[0073] The lens actuator (10) may include a cover (120). The fixing member (100) may include the cover (120). The cover (120) may be a cover member. The cover (120) may be a cover can. The cover (120) may be placed on the base (110). The cover (120) may be placed on the base (110). The cover (120) may be fixed to the base (110). The cover (120) may be coupled to the base (110). The cover (120) may be adhesively bonded to the base (110). The cover (120) may accommodate at least a portion of the base (110) therein. The cover (120) may be a shield can. The cover (120) may be formed of metal.

[0074] The cover (120) may include a top plate (121). The top plate (121) may include a hole through which light passes. The top plate (121) may include a hole formed at a position corresponding to a lens. The cover (120) may include a side plate (122). The side plate (122) may extend from the top plate (121). The side plate (122) may extend downward from an outer edge of the top plate (121). The side plate (122) may be formed in a shape bent from the top plate (121).

[0075] The side plate (122) of the cover (120) may include a plurality of side plates. The side plate (122) may include a first side plate and a second side plate positioned opposite each other, and a third side plate and a fourth side plate positioned opposite each other.

[0076] The lens actuator (10) may include a substrate (130). The fixing member (100) may include the substrate (130). The substrate (130) may be placed on the base (110). The substrate (130) may be placed on the base (110). The substrate (130) may be fixed to the base (110). The substrate (130) may be coupled to the base (110). The substrate (130) may be adhered to the base (110). The substrate (130) may be placed on the side plate (122) of the cover (120). The substrate (130) may be placed on the side plate (122) of the cover (120). The substrate (130) may be fixed to the side plate (122) of the cover (120). The substrate (130) may be coupled to the side plate (122) of the cover (120). The substrate (130) may be adhered to the side plate (122) of the cover (120). The substrate (130) may be a flexible printed circuit board (FPCB). The substrate (130) may supply power to the coil (320). The substrate (130) may supply power to the sensor (330). The substrate (130) may be arranged parallel to the optical axis.

[0077] The substrate (130) may include a terminal (131). The terminal may be arranged on the outer surface of the substrate (130). The terminal (131) may be formed at the bottom of the substrate (130). The terminal (131) may include a plurality of terminals. The terminal (131) may be coupled to a terminal of a printed circuit board (50). The terminal (131) may include a terminal electrically connected to a sensor (330). The terminal (131) may include a terminal electrically connected to a coil (320). The terminal (131) may include four terminals. The substrate (130) may include a bent portion. The substrate (130) may include a body portion where the coil (320) and the sensor (330) are arranged, and a bent portion that is bent and extended from the body portion. A terminal (131) may be arranged at the bottom of the outer surface of the bent portion.

[0078] The lens actuator (10) may include a ball pressurizing member. The ball pressurizing member may pressurize the ball (400) so that the ball remains in contact with the body. The ball pressurizing member may include a magnet (310) and a yoke (140) that exert an attractive force on each other.

[0079] The lens actuator (10) may include a yoke (140). The ball pressurizing member may include the yoke (140). The fixing member (100) may include the yoke (140). The yoke (140) may be disposed on the base (110). The yoke (140) may be fixed to the base (110). The yoke (140) may be coupled to the base (110). The yoke (140) may be disposed on the substrate (130). The yoke (140) may be fixed to the substrate (130). The yoke (140) may be coupled to the substrate (130). The yoke (140) may be placed on the side plate (122) of the cover (120). The yoke (140) may be placed on the side plate (122) of the cover (120). The yoke (140) may be fixed to the side plate (122) of the cover (120). The yoke (140) may be coupled to the side plate (122) of the cover (120).

[0080] The yoke (140) can exert an attractive force on the magnet (310). A force can be applied to the magnet (310) to move it toward the yoke (140). The holder (210) can press the ball (400) toward the base (110) by the attractive force between the magnet (310) and the yoke (140).

[0081] The lens driving device (10) may include a moving part (200). The moving part (200) may be a moving member. The moving part (200) may be a part that moves with respect to the fixed part (100). The moving part (200) may be moved by the driving part (300). The moving part (200) may be arranged to be movable with respect to the fixed part (100). The moving part (200) may move with respect to the fixed part (100) when autofocus is driven.

[0082] The lens actuator (10) may include a holder (210). The moving unit (200) may include the holder (210). The holder (210) may be a lens holder. The holder (210) may be a carrier. The holder (210) may be placed on the base (110). The holder (210) may be placed on the base (110). The holder (210) may be placed within the base (110). The holder (210) may be movably placed on the base (110). The holder (210) may move relative to the base (110). The holder (210) may move in the direction of the optical axis. The holder (210) may be coupled to a lens. The holder (210) may move integrally with the lens.

[0083] The holder (210) may include a first side. A magnet (310) may be placed on the first side. A ball (400) may be placed on the first side.

[0084] The holder (210) may include a groove. The groove may be a magnet receiving groove. The groove may be formed by recessing a first side of the holder (210). A magnet (310) may be placed in the groove. At least a portion of the magnet (310) may be received in the groove.

[0085] The holder (210) may include a rail (211). The rail (211) may be a ball rail. The rail (211) may be formed by being recessed into a first side of the holder (210). The rail (211) may be arranged in the direction of the optical axis. The rail (211) may extend in the direction of the optical axis. A ball (400) may be arranged on the rail (211). At least a portion of the ball (400) may be accommodated on the rail (211). The ball (400) may move along the rail (211). The rail (211) may be formed in a groove shape. The rail (211) may be a groove.

[0086] The rail (211) may include a plurality of rails. The rail (211) may include a first rail (211-1) and a second rail (211-2). The rail (211) may include a first rail (211-1) arranged on one side of the magnet (310) and a second rail (211-2) arranged on the other side of the magnet (310). The first ball (410) and the second ball (420) may be arranged on the first rail (211-1). The third ball (430) and the fourth ball (440) may be arranged on the second rail (211-2).

[0087] The holder (210) may include a second protrusion (212). The second protrusion (212) may be formed to protrude from the rail (211) of the holder (210). The second protrusion (212) may be a guide. The second protrusion (212) may be formed in a shape that does not interfere with the rail (111) of the base (110). The second protrusion (212) may include a triangular cross-sectional shape. The second protrusion (212) may support the first ball (410) from the upper side. The second protrusion (212) may support the third ball (430) from the upper side.

[0088] The second protrusion (212) may be formed to protrude from the first rail (211-1) of the holder (210). The second protrusion (212) may be arranged between the first ball (410) and the first protrusion (112) of the base (110). The second protrusion (212) may be arranged between the first ball (410) and the first protrusion (112) of the base (110) in the direction of the optical axis. The second protrusion (212) may be arranged between the first ball (410) and the second ball (420). The second protrusion (212) may be arranged between the first ball (410) and the second ball (420) in the direction of the optical axis.

[0089] The second protrusion (212) may be formed to protrude from the second rail (211-2) of the holder (210). The second protrusion (212) may be arranged between the third ball (430) and the first protrusion (112) of the base (110). The second protrusion (212) may be arranged between the third ball (430) and the first protrusion (112) of the base (110) in the direction of the optical axis. The second protrusion (212) may be arranged between the third ball (430) and the fourth ball (440). The second protrusion (212) may be arranged between the third ball (430) and the fourth ball (440) in the direction of the optical axis.

[0090] The second protrusion (212) of the holder (210) may overlap with the first protrusion (112) of the base (110) in the direction of the optical axis. In the direction of the optical axis, the first ball (410), the second protrusion (212) of the holder (210), the first protrusion (112) of the base (110), and the second ball (420) may overlap in this order. The first protrusion (112) of the base (110) may be arranged on an imaginary line connecting the first ball (410) and the second ball (420). The second protrusion (212) of the holder (210) may be arranged on an imaginary line connecting the first ball (410) and the second ball (420).

[0091] When the holder (210) is moved to the maximum upward in the direction of the optical axis, the first protrusion (112) of the base (110) and the second protrusion (212) of the holder (210) may be spaced apart from each other. As shown in (b) of FIG. 4a, when the holder (210) is in contact with the upper plate (121) of the cover (120), a gap may be formed between the first protrusion (112) of the base (110) and the second protrusion (212) of the holder (210).

[0092] The second protrusion (212), which is a guide shape of the moving part (200), and the first protrusion (112), which is a guide shape of the fixed part (100), can be designed with a margin so that they do not come into contact under any circumstances. However, if the optical axis direction length of the guide shape of the moving part (200) and the fixed part (100) becomes too short, the injection property is reduced and there is a possibility that the guide shape may be damaged due to contact with the ball (400).

[0093] The length of the second protrusion (212) of the holder (210) in the optical axis direction (see L2 in FIG. 3) may be greater than the diameter of the first ball (410) (see D2 in FIG. 3). The length of the second protrusion (212) of the holder (210) in the optical axis direction may be greater than the diameter of the second ball (420). In a variation, the length of the second protrusion (212) of the holder (210) in the optical axis direction may be equal to the diameter of the first ball (410). The length of the second protrusion (212) of the holder (210) in the optical axis direction may be less than the diameter of the first ball (410).

[0094] The holder (210) may include a fourth protrusion (213). The fourth protrusion (213) may support the upper end of the ball (400). The fourth protrusion (213) may prevent the ball (400) from being removed upward.

[0095] The fourth protrusion (213) may be formed at the upper end of the first rail (211-1). The fourth protrusion (213) may cover the second ball (420). The fourth protrusion (213) may be positioned above the second ball (420). The fourth protrusion (213) may prevent the second ball (420) from being lifted upward. The second ball (420) may be positioned between the first protrusion (112) of the base (110) and the fourth protrusion (213) of the holder (210) in the direction of the optical axis.

[0096] The fourth protrusion (213) may be formed at the upper end of the second rail (211-2). The fourth protrusion (213) may cover the fourth ball (440). The fourth protrusion (213) may be positioned above the fourth ball (440). The fourth protrusion (213) may prevent the fourth ball (440) from being lifted upward. The fourth ball (440) may be positioned between the first protrusion (112) of the base (110) and the fourth protrusion (213) of the holder (210) in the direction of the optical axis.

[0097] The holder (210) may include an upper stopper (216). The upper stopper (216) may be formed on the upper surface of the holder (210). The upper stopper (216) may form the upper end of the holder (210). The upper stopper (216) may contact the upper plate (121) of the cover (120) when the holder (210) moves upward. That is, the upward movement of the holder (210) may be restricted by the upper stopper (216). The upper stopper (216) may include a protrusion.

[0098] The holder (210) may include a stopper (217). The stopper (217) may be formed as a protrusion or projection. The stopper (217) may be formed to protrude on the outer surface of the holder (210). The stopper (217) may be placed in the groove (117) of the base (110). The stopper (217) may be formed in a shape corresponding to the groove (117) of the base (110).

[0099] The stopper (217) can come into contact with the upper plate (121) of the cover (120) when the holder (210) moves upward. The stopper (217) can come into contact with the base (110) when the holder (210) moves downward. The stopper (217) can come into contact with the base (110) when the holder (210) rotates. That is, the stopper (217) can perform at least one of the functions of an upper stopper, a lower stopper, and a rotation stopper.

[0100]

[0101] The lens driving device (10) may include a driving unit (300). The driving unit (300) may move the moving unit (200) relative to the fixed unit (100). When power is applied to the driving unit (300), the moving unit (200) may move. The driving unit (300) may include a magnet (310) and a coil (320). The driving unit (300) may move the moving unit (200) through electromagnetic interaction. The magnet (310) and the coil (320) may move the holder (210) relative to the base (110). The magnet (310) and the coil (320) may move the holder (210) in the optical axis direction. The driving unit (300) may move the holder (210) in the optical axis direction relative to the base (110).

[0102] The lens driving device (10) may include a magnet (310). The driving unit (300) may include a magnet (310). The magnet (310) may be placed on the holder (210). The magnet (310) may be placed on the holder (210). The magnet (310) may be fixed to the holder (210). The magnet (310) may be coupled to the holder (210). The magnet (310) may be bonded to the holder (210) with an adhesive.

[0103] The magnet (310) can be positioned corresponding to the coil (320). The magnet (310) can overlap the coil (320) in a direction perpendicular to the optical axis. The magnet (310) can overlap the coil (320) in the x-axis direction. Alternatively, the magnet (310) can overlap the coil (320) in the y-axis direction. The magnet (310) can be positioned to face the coil (320). The magnet (310) can face the coil (320). The magnet (310) can interact with the coil (320). The magnet (310) can electromagnetically interact with the coil (320). The magnet (310) can move when current is applied to the coil (320). The magnet (310) can move integrally with the holder (210).

[0104] The magnet (310) may be a four-pole magnet. The magnet (310) may include a first magnet portion including a north pole and a south pole, a second magnet portion disposed on the first magnet portion and including a south pole and a north pole, and a neutral portion disposed between the first magnet portion and the second magnet portion. The magnet (310) may be disposed in the direction of the optical axis.

[0105] Alternatively, the magnet (310) may be a two-pole magnet. For example, the upper region of the magnet (310) may be the N pole and the lower region may be the S pole.

[0106] The magnet (310) can be positioned so that it interacts with the yoke (140). The ball (400) can be pressed between the holder (210) and the base (110) by the force exerted by the magnet (310) to move toward the yoke (140). Through this, the ball (400) can be maintained in close contact with the holder (210) and the base (110).

[0107] The lens driving device (10) may include a coil (320). The driving unit (300) may include the coil (320). The coil (320) may be disposed on the substrate (130). The coil (320) may be fixed to the substrate (130). The coil (320) may be coupled to the substrate (130). The coil (320) may be soldered to the substrate (130). The coil (320) may be disposed on the base (110). The coil (320) may be fixed to the base (110). The coil (320) may be disposed on the side plate (122) of the cover (120). The coil (320) can be placed on the side plate (122) of the cover (120).

[0108] The coil (320) can interact with the magnet (310). The coil (320) can be positioned to face the magnet (310). The coil (320) can face the magnet (310). The coil (320) can be positioned at a position corresponding to the magnet (310). The coil (320) can overlap the magnet (310) in a direction perpendicular to the optical axis. The coil (320) can overlap the magnet (310) in the x-axis direction. Alternatively, the coil (320) can overlap the magnet (310) in the y-axis direction. The coil (320) can move the magnet (310). The coil (320) can move the holder (210). The coil (320) can move the lens.

[0109] When current is applied to the coil (320), the magnet (310) can move. When a forward current is applied to the coil (320), the magnet (310) can move upward. When a reverse current is applied to the coil (320), the magnet (310) can move downward. However, conversely, when a reverse current is applied to the coil (320), the magnet (310) can move upward, and when a forward current is applied to the coil (320), the magnet (310) can move downward.

[0110] The lens driving device (10) may include a sensor (330). The driving unit (300) may include the sensor (330). The sensor (330) may be disposed on the substrate (130). The sensor (330) may be disposed on the substrate (130). The sensor (330) may be coupled to the substrate (130). The sensor (330) may be soldered to the substrate (130). The sensor (330) may be mounted on the substrate (130).

[0111] The sensor (330) can detect the magnet (310). The sensor (330) can detect the magnetic force of the magnet (310). The sensor (330) may be a Hall sensor. The sensor (330) can detect the position or movement of the magnet (310). Through this, the sensor (330) can detect the position or movement of the holder (210). The sensor (330) can detect the holder (210). The position of the magnet (310) detected by the sensor (330) can be used for autofocus feedback control.

[0112] The lens actuator (10) may include a guide portion. The guide portion may guide the movement of the moving portion (200) relative to the fixed portion (100). The guide portion may guide the movement of the moving portion (200) in the direction of the optical axis.

[0113] The lens actuator (10) may include a ball (400). The guide portion may include the ball (400). The ball (400) may be formed of ceramic. The ball (400) may be a ceramic ball. The ball (400) may be formed in a spherical shape. The ball (400) may include a curved surface.

[0114] The ball (400) can be placed on the base (110). The ball (400) can be placed on the base (110). The ball (400) can be in contact with the base (110). The ball (400) can be placed on the rail (111) of the base (110). The ball (400) can be placed on the rail (111) of the base (110). The ball (400) can be in contact with the rail (111) of the base (110).

[0115] The ball (400) can be placed in the holder (210). The ball (400) can be placed on the holder (210). The ball (400) can be in contact with the holder (210). The ball (400) can be placed on the rail (211) of the holder (210). The ball (400) can be placed on the rail (211) of the holder (210). The ball (400) can be in contact with the rail (211) of the holder (210).

[0116] The ball (400) can be placed between the base (110) and the holder (210). The ball (400) can be placed between the rail (111) of the base (110) and the rail (211) of the holder (210). The ball (400) can be placed between the base (110) and the holder (210) in a first direction perpendicular to the optical axis direction. The ball (400) can be placed between the holder (210) and the base (110) in a direction in which the magnet (310) faces the yoke (140).

[0117] The ball (400) can move in the direction of the optical axis. The ball (400) can move together with the holder (210) when the holder (210) moves. The ball (400) can limit the movement of the holder (210) to movement in the direction of the optical axis. The holder (210) can be limited by the ball (400) from moving in any direction other than the direction of the optical axis. The ball (400) can guide the movement of the holder (210) in the direction of the optical axis.

[0118] When the holder (210) is moved by the driving unit (300), the ball (400) can roll along the rail (111) of the base (110). In the present embodiment, the ball (400) can move without rotating in place when the holder (210) moves. The ball (400) can be subject to rotational frictional force generated when rotating in place and rolling frictional force generated when rolling. In the present embodiment, the rolling frictional force can be used instead of the rotational frictional force. The rolling frictional force can be smaller than the rotational frictional force. Therefore, in the present embodiment, the power consumed for driving can be reduced.

[0119] The present embodiment may include a structure in which the ball (400) does not interfere with the moving part (200) or the fixed part (100) when the moving part (200) moves upward (see b of (b) of FIG. 4a) while the moving space of the ball (400) opens. Accordingly, in the present embodiment, the ball (400) may roll along the rail (111, 211) rather than rotating in place. When the moving part (200) moves upward, the rolling friction of the ball (400) may be utilized.

[0120] Furthermore, the rolling friction of the ball (400) can be utilized even when the moving part (200) moves downward (see a of (a) of FIG. 4a).

[0121] As illustrated in (b) of Fig. 4a, the minimum separation distance in the optical axis direction between the two balls (410, 420) (see D of Fig. 4a) can be maintained. Even when the holder (210) moves, the distance between the first ball (410) and the second ball (420) can be maintained.

[0122] In this embodiment, the phenomenon of the ball (400) being tilted can be prevented compared to the comparative example in which the second protrusion (212) of the moving part (200) and the first protrusion (112) of the fixed part (100) are not present. If the phenomenon of the ball (400) being tilted occurs in the comparative example, tilting may occur during movement of the moving part (200), which may cause problems.

[0123] The ball (400) may include a plurality of balls. The ball (400) may include four balls. The ball (400) may include first to fourth balls (410, 420, 430, 440). The ball (400) may include a first ball (410) and a second ball (420) arranged on a first rail (111-1) of a base (110). The ball (400) may include a first ball (410) and a second ball (420) arranged on a first rail (211-1) of a holder (210). The ball (400) may include a third ball (430) and a fourth ball (440) arranged on a second rail (111-2) of the base (110). The ball (400) may include a third ball (430) and a fourth ball (440) placed on the second rail (211-2) of the holder (210).

[0124] The first ball (410) and the second ball (420) can be overlapped in the direction of the optical axis. The second ball (420) can be placed on the first ball (410). The third ball (430) and the fourth ball (440) can be overlapped in the direction of the optical axis. The fourth ball (440) can be placed on the third ball (430). The first ball (410) and the third ball (430) can be overlapped in a direction perpendicular to the optical axis. The second ball (420) and the fourth ball (440) can be overlapped in a direction perpendicular to the optical axis.

[0125] The diameter of the first ball (410) and the diameter of the second ball (420) may be the same. The diameter of the first ball (410) and the diameter of the third ball (430) may be the same. The diameter of the third ball (430) and the diameter of the fourth ball (440) may be the same. The diameter of the second ball (420) and the diameter of the fourth ball (440) may be the same. The diameter of the first ball (410) and the diameter of the fourth ball (440) may be the same.

[0126] In the present embodiment, the moving part (200) may be designed so that the moving part (200) and the ball (400) do not come into contact even when the moving part (200) has moved to the lowest side. Even when the moving part (200) has moved to the lowest side, the moving part (200) and the ball (400) may not come into contact. Through this, the risk of the ball (400) locking may be eliminated. As illustrated in (a) of Fig. 4a, even when the moving part (200) has moved to the lowest side, a gap may exist between the moving part (200) and the ball (400). A gap may exist between the moving part (200) and the first ball (410) and between the moving part (200) and the second ball (420).

[0127] In this embodiment, the ball (400) may be designed so that it does not fall down even when the moving part (200) moves to the lowest side. As shown in (b) of FIG. 4a, the gap between the third protrusion (113) of the base (110) and the holder (210) may be smaller than the radius of the ball (400). The gap between the third protrusion (113) of the base (110) and the holder (210) may be smaller than the diameter of the ball (400).

[0128] In this embodiment, the ball (400) may be designed so that it does not fall upward even when the moving part (200) moves to the uppermost side. As shown in (b) of FIG. 4a, the gap between the base (110) and the fourth protrusion (213) of the holder (210) may be smaller than the radius of the ball (400). The gap between the base (110) and the fourth protrusion (213) of the holder (210) may be smaller than the diameter of the ball (400).

[0129] When the moving part (200) moves, the ball (400) can move by half the amount of movement of the moving part (200). Therefore, the length of the rails (111, 211) (see L in (b) of FIG. 4a) can be secured to be at least the sum of the "diameter of the ball (400) (see d in (b) of FIG. 4a)" and "half the stroke length of the moving part (200)". That is, the length of the rails (111, 211) can be greater than the sum of the diameter of the ball (400) and half the stroke length of the moving part.

[0130] The length of the first protrusion (112) of the base (110) in a direction perpendicular to the optical axis (see L1 in FIG. 4b) may be greater than the radius of the individual balls (410, 420). The length of the first protrusion (112) of the base (110) in a direction perpendicular to the optical axis (see L1 in FIG. 4b) may be greater than the radius of the first ball (410) (see r1 in FIG. 4b). The length of the first protrusion (112) of the base (110) in a direction perpendicular to the optical axis (see L1 in FIG. 4b) may be greater than the radius of the second ball (420) (see r2 in FIG. 4b).

[0131] If the protruding length of the first protrusion (112) is smaller than the radius of the second ball (420), the second ball (420) may become caught between the first protrusion (112) and the holder (210), which is problematic.

[0132] The length of the second protrusion (212) of the holder (210) in a direction perpendicular to the optical axis (see L2 in FIG. 4b) may be greater than the radius of the individual balls (410, 420). The length of the second protrusion (212) of the holder (210) in a direction perpendicular to the optical axis (see L2 in FIG. 4b) may be greater than the radius of the first ball (410) (see r1 in FIG. 4b). The length of the second protrusion (212) of the holder (210) in a direction perpendicular to the optical axis (see L2 in FIG. 4b) may be greater than the radius of the second ball (420) (see r2 in FIG. 4b).

[0133] If the protruding length of the second protrusion (212) is smaller than the radius of the first ball (410), the first ball (420) may be caught between the second protrusion (212) and the base (110), which is problematic.

[0134] The rail (111) of the base (110) may include an upper rail disposed above the first protrusion (112) and a lower rail disposed below the first protrusion (112). A second ball (420) may be disposed on the upper rail of the base (110), and a first ball (410) may be disposed on the lower rail of the base (110). The length of the upper rail of the base (110) in the optical axis direction (see a1 of FIG. 4B) may be different from the length of the lower rail of the base (110) in the optical axis direction (see a2 of FIG. 4B). The length of the upper rail of the base (110) in the optical axis direction (see a1 of FIG. 4B) may be shorter than the length of the lower rail of the base (110) in the optical axis direction (see a2 of FIG. 4B). As a variation, the length of the upper rail of the base (110) in the optical axis direction may be longer than the length of the lower rail of the base (110) in the optical axis direction.

[0135] The rail (211) of the holder (210) may include an upper rail disposed above the second protrusion (212) and a lower rail disposed below the second protrusion (212). A second ball (420) may be disposed on the upper rail of the holder (210), and a first ball (410) may be disposed on the lower rail of the holder (210). The length of the upper rail of the holder (210) in the optical axis direction (see b1 of FIG. 4B) may be different from the length of the lower rail of the holder (210) in the optical axis direction (see b2 of FIG. 4B). The length of the upper rail of the holder (210) in the optical axis direction (see b1 of FIG. 4B) may be longer than the length of the lower rail of the holder (210) in the optical axis direction (see b2 of FIG. 4B). As a variation, the length of the upper rail of the holder (210) in the optical axis direction may be shorter than the length of the lower rail of the holder (210) in the optical axis direction.

[0136] As a variation, the fourth protrusion (213) may be formed as a separate member from the holder (210). The fourth protrusion (213) may be formed as a separate member and coupled to the upper portion of the holder (210). The first protrusion (112) may be formed as a separate member from the base (110). The first protrusion (112) may be formed as a separate member and coupled to the rail (111) of the base (110). The second protrusion (212) may be formed as a separate member from the holder (210). The second protrusion (212) may be formed as a separate member and coupled to the rail (211) of the holder (210).

[0137]

[0138] Below, the configuration of a lens actuator according to a modified example is described with reference to the drawings. The configuration of the modified example is described below, focusing on differences from the present embodiment. Configurations of the modified example not described below can be analogously applied to the description in the present embodiment.

[0139] Fig. 11 is a perspective view illustrating a fixed part and related components of a lens driving device according to a modified example. Fig. 12 is a perspective view illustrating a moving part and related components of a lens driving device according to a modified example. Fig. 13 is a cross-sectional view illustrating the arrangement structure of a ball and related components of a lens driving device according to a modified example.

[0140] In a modified example, the shape of the protrusion formed on the second rail (111-2, 211-2) may be modified.

[0141] The base (110) may include a fifth protrusion (114) positioned between the third ball (430) and the fourth ball (440) in the optical axis direction. In the optical axis direction, the length of the fifth protrusion (114) of the base (110) may be shorter than the length of the first protrusion (112) of the base (110).

[0142] The base (110) may include a seventh protrusion (115). The seventh protrusion (115) may support the lower end of the third ball (430). The bottom surface of the seventh protrusion (115) may be positioned higher than the bottom surface of the third protrusion (113).

[0143] The holder (210) may include a sixth protrusion (214) positioned between the third ball (430) and the fourth ball (440) in the optical axis direction. In the optical axis direction, the length of the sixth protrusion (214) of the holder (210) may be shorter than the length of the second protrusion (212) of the holder (210).

[0144] The holder (210) may include an eighth protrusion (215). The eighth protrusion (215) may cover the fourth ball (440) from above. The ceiling surface of the eighth protrusion (215) may be positioned lower than the ceiling surface of the fourth protrusion (213).

[0145] In a variation, the first to fourth balls (410, 420, 430, 440) may be arranged asymmetrically. The third ball (430) may be arranged higher than the first ball (410). The fourth ball (440) may be arranged lower than the second ball (420). Therefore, the distance between the third ball (430) and the fourth ball (440) may be closer than the distance between the first ball (410) and the second ball (420). In a direction perpendicular to the optical axis, the first ball (410) may not overlap the third ball (430). In a direction perpendicular to the optical axis, the second ball (420) may not overlap the fourth ball (440). The second ball (420) may be arranged higher than the first ball (410), and the fourth ball (440) may be arranged higher than the third ball (430). The first ball (410) and the second ball (420) can overlap in the optical axis direction, and the third ball (430) and the fourth ball (440) can overlap in the optical axis direction.

[0146]

[0147] Below, the auto focus operation of the lens driving device according to the present embodiment is described with reference to the drawings.

[0148] Fig. 14 is a drawing for explaining auto focus driving of a lens driving device according to the present embodiment.

[0149] When current is applied to the coil (320), an electromagnetic field is formed around the coil (320), and the coil (320) and the magnet (310) can electromagnetically interact. At this time, since the coil (320) is fixed to the substrate (130) and the base (110), the magnet (310) can move. The magnet (310) can move together with the holder (210) and the lens (see A of FIG. 14). At this time, the ball (400) guides the movement of the holder (210) with respect to the base (110) in the optical axis direction, so the holder (210) and the lens can move in the optical axis direction (see OA of FIG. 14) (see B of FIG. 14). Through this, the lens can move in the optical axis direction with respect to the image sensor (60).

[0150] In more detail, when a forward current is applied to the coil (320), the magnet (310) can move upward in the optical axis direction due to the interaction between the coil (320) and the magnet (310). Through this, the lens can move away from the image sensor (60). In the initial position where no current is applied to the coil (320), an upper stroke space can be formed between the upper stopper (216) of the holder (210) and the upper plate (121) of the cover (120). When a forward current is applied to the coil (320), the holder (210) can move within the upper stroke space.

[0151] In addition, when a reverse current is applied to the coil (320), the magnet (310) can move downward in the optical axis direction due to the interaction between the coil (320) and the magnet (310). Through this, the lens can be brought closer to the image sensor (60). In the initial position where no current is applied to the coil (320), a lower stroke space can be formed between the lower stopper of the holder (210) and the base (110). When a reverse current is applied to the coil (320), the holder (210) can move within the lower stroke space.

[0152] In this way, by applying a forward or reverse current to the coil (320), the image of the subject formed on the image sensor (60) can be clearly adjusted. That is, auto focus operation can be performed.

[0153] Furthermore, the sensor (330) can detect the magnetic field of the magnet (310) in real time to detect the positions of the magnet (310), the holder (210), and the lens. Feedback control can be performed to move the lens to a more accurate position through the position of the lens detected by the sensor (330). In the present embodiment, more precise autofocus operation can be performed through autofocus feedback control.

[0154]

[0155] Below, the configuration of the camera device according to the present embodiment is described with reference to the drawings.

[0156] Fig. 15 is an exploded perspective view of a camera device according to the present embodiment.

[0157] The camera device (10A) may include a lens driving device (10). 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. As a variation, the lens driving device (10) may include an OIS module. The lens driving device (10) may be a device that drives a lens. As illustrated in the drawing, the lens driving device (10) may include a lens. However, the lens may be understood as a separate component from the lens driving device (10) as a component of the camera device (10A).

[0158] The camera device (10A) may include a lens module (20). The lens module (20) may be placed on an image sensor (60). The lens module (20) may be coupled to a lens driving device (10). The lens module (20) may be coupled to a holder (210) of the lens driving device (10). The lens module (20) may be moved integrally with the holder (210). The lens module (20) may be placed to be movable with respect to the image sensor (60). The lens module (20) may be moved in the optical axis direction with respect to the image sensor (60).

[0159] The lens module (20) may include a lens. The lens may include a plurality of lenses. The lens module (20) may include a barrel. The plurality of lenses may be arranged within the barrel. The plurality of lenses may be coupled to the inner surface of the barrel. The plurality of lenses may be arranged in a stacked manner within the barrel.

[0160] 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) of the lens driving device (10). 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).

[0161] 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 the inside of which a filter (30) is disposed. An opening may be formed in the portion of the sensor base (40) where 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.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] The camera device (10A) may include a control unit (80). The control unit (80) may be disposed on a printed circuit board (50). The control unit (80) may be electrically connected to a coil (320) of a lens driving device (10). The control unit (80) may individually control the direction, intensity, amplitude, etc. of the current supplied to the coil (320). The control unit (80) may control the lens driving device (10) to perform an autofocus function and / or a shake correction function. Furthermore, the control unit (80) may perform autofocus feedback control and / or shake correction feedback control for the lens driving device (10).

[0166] 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.

[0167]

[0168] Below, the configuration of the optical device according to the present embodiment is described with reference to the drawings.

[0169] Fig. 16 is a perspective view of an optical device according to the present embodiment.

[0170] The optical device (1) may include at least one 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 photos. The optical device (1) may include a robot. The optical device (1) may include a vehicle.

[0171] An optical device (1) may include a main body (2). The optical device (1) may include a camera device (10A). The camera device (10A) may be disposed on the main body (2). The camera device (10A) may photograph a subject. The optical device (1) may include a display. The display may be disposed on the main body (2). The display may output one or more of a video or image captured by the camera device (10A). The display may be disposed on a first surface of the main body (2). The camera device (10A) may be disposed on one or more of the first surface of the main body (2) and a second surface opposite the first surface. The camera device (10A) may have a triple camera disposed in a vertical direction. Alternatively, the camera device (10A) may have a triple camera disposed in a horizontal direction.

[0172]

[0173] 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 holder placed on the above base; A driving unit for moving the holder in the optical axis direction with respect to the base; and Including a ball placed between the base and the holder, The above base includes a groove-shaped rail extending in the direction of the optical axis, The above ball includes a first ball and a second ball arranged on the rail of the above base, The above base includes a first protrusion formed to protrude from the rail of the above base, The first protrusion of the above base is arranged between the first ball and the second ball in the direction of the optical axis, A camera device in which the length of the first protrusion in the direction perpendicular to the optical axis is greater than the radius of the second ball.

2. In paragraph 1, The holder includes a groove-shaped rail extending in the direction of the optical axis, and a second protrusion formed to protrude from the rail of the holder, A camera device in which the second protrusion of the holder is positioned between the first ball and the first protrusion of the base in the direction of the optical axis.

3. In paragraph 2, A camera device in which the first protrusion of the base and the second protrusion of the holder are spaced apart from each other when the holder is moved to the maximum upward in the direction of the optical axis.

4. In paragraph 2, The above base includes a third protrusion, A camera device in which the first ball is positioned between the third protrusion of the base and the second protrusion of the holder in the direction of the optical axis.

5. In paragraph 1, The above holder includes a fourth protrusion, A camera device in which the second ball is positioned between the first protrusion of the base and the fourth protrusion of the holder in the direction of the optical axis.

6. In paragraph 1, A camera device in which the ball rolls along the rail of the base when the holder is moved by the driving unit.

7. In paragraph 2, A camera device in which the second protrusion of the holder overlaps the first protrusion of the base in the direction of the optical axis.

8. In paragraph 1, A camera device wherein the length of the first protrusion of the base in the optical axis direction is greater than the diameter of the second ball.

9. In paragraph 2, A camera device wherein the length of the second protrusion of the holder in the optical axis direction is greater than the diameter of the first ball.

10. In paragraph 1, A camera device wherein the diameter of the first ball and the diameter of the second ball are the same.

Images