Lens driving device, camera module, and optical system

Abstract

A lens driving device, a camera module, and an optical system are disclosed. The lens driving device includes a base, a housing disposed on the base, a coil holder disposed in the housing, a magnet disposed on the housing, an upper elastic member coupled to an upper portion of the coil holder and an upper portion of the housing, a first coil disposed on an outer peripheral surface of the coil holder, a printed circuit board disposed on the base, a second coil disposed opposite the magnet in a first direction parallel to an optical axis direction, and a support member coupled to the upper elastic member and configured to support the housing, wherein the base includes a cutout portion formed at a corner of the base opposite the support member in the first direction, and a first recess recessed from a lower surface of the base and disposed to surround at least a portion of the cutout portion.

Description

[0001] This application is a divisional application of Chinese patent application No. 202011308032.X, filed on November 19, 2020, entitled "Lens Driving Device and Camera Device Module Including the Lens Driving Device". Chinese patent application No. 202011308032.X is a divisional application of Chinese patent application No. 201680014095.X, which was filed on February 1, 2016 and entered the Chinese national phase on September 6, 2017, entitled "Lens Driving Device and Camera Device Module Including the Lens Driving Device". Technical Field

[0002] The embodiments relate to a lens driving device and a camera device module including the lens driving device. Background Technology

[0003] The descriptions in this section are merely background information related to the implementation methods and do not constitute prior art.

[0004] Recently, IT products, including ultra-compact digital camera devices, such as mobile phones, smartphones, tablets, and laptops, have been actively developing.

[0005] An IT product is provided that incorporates a conventional ultra-compact digital camera device equipped with a lens drive unit that has an autofocus mechanism for aligning the lens to its focal length by adjusting the distance between the lens and the image sensor, which converts external light into digital images or digital video.

[0006] However, in the case of this lens-driven device, there may be a problem of resonance caused by mechanical vibration, and improvements are needed.

[0007] The lens driving device and the camera module including the lens driving device can be equipped with multiple components bonded together by adhesive. Therefore, assembly defects may occur during the bonding step using adhesive, and thus improvements are needed. Summary of the Invention

[0008] [Technical Issues]

[0009] The embodiment provides a lens driving device and an imaging device module including the lens driving device, the lens driving device having a structure that can suppress resonance caused by mechanical vibration that may occur during autofocus or camera shake correction.

[0010] In addition, the embodiment provides a lens driving device that can reduce assembly defects during the bonding step using adhesives.

[0011] The technical objectives that can be achieved through the implementation methods are not limited to those specifically described above, and those skilled in the art will understand more clearly from the following detailed description other technical objectives not described herein.

[0012] [Technical Solution]

[0013] In one embodiment, the lens driving device includes: a coil holder on which a first coil is disposed on its outer peripheral surface; a position detection sensor disposed on the coil holder; a housing on which the coil holder is disposed on its inner side; an upper elastic member disposed on the upper side of the housing; and a support member configured to support the housing so that the housing can move along a second or third direction perpendicular to the first direction, wherein the upper elastic member is divided into a plurality of portions and at least two of the portions are arranged parallel to each other in the xy plane in the second or third direction, wherein the at least two portions may be arranged such that one end of the at least two portions faces each other.

[0014] In another embodiment, the lens driving device includes: a coil holder on which a first coil is disposed on its outer peripheral surface; a housing on which the coil holder is disposed on its inner side; a first magnet fixed to the housing; a second coil disposed on the underside of the first magnet opposite to the first magnet; a printed circuit board disposed on the underside of the second coil and having a terminal surface that allows terminals to be mounted thereon; and a base disposed below the coil holder and for receiving and bonding the printed circuit board thereto, wherein the lower surface of the base may have a portion having a first recess to which the terminal surface of the printed circuit board is bonded.

[0015] In another embodiment, the camera module includes a lens driving device and an image sensor mounted on the lens driving device.

[0016] According to one aspect of this disclosure, a lens driving device is provided, comprising: a housing; a coil holder disposed in the housing; a first coil disposed on an outer peripheral surface of the coil holder; a magnet disposed on the housing; a second coil arranged opposite the magnet in a first direction parallel to the optical axis; a printed circuit board disposed below the second coil and including a terminal surface and a plurality of terminals formed in the terminal surface; and a base disposed below the printed circuit board and including a curved portion corresponding to the terminal surface of the printed circuit board, wherein the terminal surface is curved from a side surface of the printed circuit board and bonded to the curved portion of the base by an adhesive, wherein a first recess is formed on the portion of the lower surface of the base to which the terminal surface of the printed circuit board is bonded.

[0017] According to another aspect of this disclosure, a lens driving device is provided, comprising: a housing; a coil holder disposed in the housing; a first coil disposed on the outer peripheral surface of the coil holder; a magnet disposed on the housing; a second coil arranged opposite to the magnet along a first direction parallel to the optical axis; a printed circuit board disposed below the second coil and including a terminal surface and a plurality of terminals formed in the terminal surface; and a base disposed below the printed circuit board and including a curved portion corresponding to the terminal surface of the printed circuit board, wherein the terminal surface extends from the outer peripheral surface of the coil holder. The side surface of the printed circuit board is bent and bonded to the base by an adhesive, wherein a first recess is formed on a portion of the lower surface of the base and the first recess surrounds at least a portion of the bent portion of the base, and wherein the upper elastic member includes four upper elastic members, wherein the support member includes four support members corresponding to the four upper elastic members, wherein each of the four upper elastic members includes: a side portion coupled to the coil frame and electrically connected to the position detection sensor; and an opposite side portion coupled to the housing and electrically connected to a corresponding one of the four support members.

[0018] According to another aspect of this disclosure, a lens driving device is provided, comprising: a housing; a coil holder disposed in the housing; a first coil disposed on an outer peripheral surface of the coil holder; a magnet disposed on the housing; a second coil arranged opposite to the magnet in a first direction parallel to the optical axis; a printed circuit board disposed below the second coil and including a terminal surface and a plurality of terminals formed in the terminal surface; and a base disposed below the printed circuit board and including a curved portion corresponding to the terminal surface of the printed circuit board, wherein the base includes a cutout disposed at a corner of the base, and the cutout is spaced apart from a front end and a rear end of the curved portion of the base.

[0019] According to another aspect of this disclosure, a lens driving device is provided, comprising: a base; a housing disposed on the base; a coil holder disposed in the housing; a magnet disposed on the housing; an upper elastic member coupled to an upper portion of the coil holder and an upper portion of the housing; a first coil disposed on an outer peripheral surface of the coil holder; a printed circuit board disposed on the base; a second coil arranged opposite to the magnet in a first direction parallel to the optical axis; and a support member coupled to the upper elastic member and configured to support the housing, wherein the base includes: a cutout formed at a corner of the base opposite to the support member in the first direction; and a first recess recessed from a lower surface of the base and arranged to surround at least a portion of the cutout.

[0020] According to another aspect of this disclosure, a lens driving device is provided, comprising: a base including a hollow portion; a housing disposed on the base; a coil holder disposed in the housing; a magnet disposed on the housing; an upper elastic member coupled to an upper portion of the coil holder and an upper portion of the housing; a first coil disposed on an outer peripheral surface of the coil holder; a printed circuit board disposed on the base; a second coil disposed opposite to the magnet in a first direction parallel to the optical axis; and a support member coupled to the upper elastic member and configured to support the housing, wherein the base includes: a cutout formed at a corner of the base and a first recess recessed from a lower surface of the base, wherein the base includes a curved portion coupled to a terminal surface of the printed circuit board, and a portion of the first recess is formed along the longitudinal direction of the curved portion, and another portion of the first recess is formed along the cutout.

[0021] According to another aspect of this disclosure, a camera device module is provided, comprising: a lens barrel; the aforementioned lens driving device coupled to the lens barrel; and an image sensor.

[0022] According to another aspect of this disclosure, an optical system is also provided, including the aforementioned camera device module.

[0023] [Beneficial Effects]

[0024] In one embodiment, the upper elastic member is divided into multiple parts, and a portion of the divided parts can be arranged in parallel to increase the elastic modulus, spring constant, or stiffness of the upper elastic member, thereby suppressing unnecessary tilting and offset of the coil frame or housing when operating the lens drive device.

[0025] In this embodiment, since the additional adhesive can be accommodated in the first recess provided on the lower side of the base, it is possible to prevent the adhesive from forming a protrusion on the bottom surface of the base. Attached Figure Description

[0026] Figure 1 A perspective view of a lens driving device according to an embodiment is shown.

[0027] Figure 2 An exploded perspective view of a lens driving device according to an embodiment is shown.

[0028] Figure 3 A plan view of a lens drive device with the cover member removed according to an embodiment is shown.

[0029] Figure 4 for Figure 3 Perspective view.

[0030] Figure 5 A plan view showing the arrangement of the upper elastic member and the first magnet in the lens driving device according to an embodiment.

[0031] Figure 6 This is a plan view showing a portion of the construction of a lens driving device according to an embodiment.

[0032] Figure 7 for Figure 6 Side view.

[0033] Figure 8 A plan view showing the arrangement of the upper elastic member and the first magnet in a lens driving device according to another embodiment.

[0034] Figure 9 A graph showing the frequency response analysis results of the lens driving device according to the embodiment is provided.

[0035] Figure 10 To show Figure 9 The view of part A in the image.

[0036] Figure 11 A perspective view of a lens driving device according to another embodiment is shown.

[0037] Figure 12 An exploded perspective view of a lens driving device according to another embodiment is shown.

[0038] Figure 13 An exploded perspective view showing a portion of a lens driving device according to another embodiment is shown.

[0039] Figure 14 for Figure 13 A perspective view from below.

[0040] Figure 15 This is a bottom perspective view showing a portion of a lens driving device according to another embodiment.

[0041] Figure 16 for Figure 15 Side view.

[0042] Figure 17 for Figure 16 An enlarged view of part B in the image.

[0043] Figure 18 This is a plan view of the base according to the embodiment.

[0044] Figure 19 This is a bottom view of the base according to one embodiment.

[0045] Figure 20 This is a bottom view of the base according to another embodiment. Detailed Implementation

[0046] In the following description, embodiments will be detailed with reference to the accompanying drawings. This disclosure allows for various modifications and alternatives, with specific embodiments shown in the drawings only as examples. However, this disclosure should not be construed as limiting oneself to the embodiments set forth herein, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the embodiments. For clarity and convenience, the dimensions and shapes of the components shown in the drawings may be exaggerated.

[0047] It is understood that although terms such as "first," "second," etc., may be used herein to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish one element from another. Furthermore, terms specifically defined in consideration of the construction and operation of the embodiments are used only to describe the embodiments and not to limit the scope of the embodiments.

[0048] In the description of the embodiments, it should be understood that when an element is described as being "on" or "below" another element, it may be located "directly" on or below the other element, or it may be formed "indirectly" such that one or more other intermediate elements exist between the two elements. Additionally, when an element is described as being "on" or "below," the terms "on" or "below" may refer not only to the upper side of the element but also to the lower side of the element.

[0049] It should also be understood that relational terms such as above / upper part / above and below / lower part / below are used only to distinguish one object or element from another, and do not necessarily require or involve any physical or logical relationship or order between these objects or elements.

[0050] Furthermore, a Cartesian coordinate system (x, y, z) can be used in the accompanying figures. In the figures, the x-axis and y-axis refer to axes perpendicular to the optical axis. For simplicity, the direction of the optical axis (z-axis direction) can be referred to as the first direction, the x-axis direction as the second direction, and the y-axis direction as the third direction.

[0051] Figure 1 A perspective view of a lens driving device according to an embodiment is shown. Figure 2 An exploded perspective view of a lens driving device according to an embodiment is shown.

[0052] A hand shake correction device for a small camera module used in mobile devices such as smartphones or tablet PCs is a device configured to prevent the edges of a captured image from being blurred due to vibrations caused by the user's hand shaking when capturing a still image.

[0053] An autofocus device is a means of automatically focusing an image of an object onto an image sensor (not shown). Image stabilization and autofocus can be constructed in various ways. In one embodiment, an optical module comprising multiple lenses can be moved along a first direction or relative to a plane orthogonal to the first direction to perform image stabilization and / or autofocus.

[0054] like Figure 1 and Figure 2 As shown, the lens driving device according to the embodiment may include a movable unit. Here, the movable unit can perform the lens's autofocus function and shaky camera correction function. The movable unit may include a coil holder 110, a first coil 120, a first magnet 130, a housing 140, an upper elastic member 150, a lower elastic member 160, a position detection sensor 170, and a sensor substrate 180.

[0055] A coil holder 110 is disposed inside the housing 140, and a first coil 120 is disposed on the outer peripheral surface of the coil holder 110. The first coil 120 is disposed inside the first magnet 130. The coil holder can be mounted to reciprocate in a first direction within the internal space of the housing 140 via electromagnetic interaction between the first magnet 130 and the first coil 120. The first coil 120 can be mounted on the outer peripheral surface of the coil holder 110 to interact electromagnetically with the first magnet 130.

[0056] In addition, the coil holder 110 is elastically supported by the upper elastic member 150 and the lower elastic member 160, so that it can move along the first direction to perform the autofocus function.

[0057] The coil holder 110 may include a lens barrel (not shown) in which at least one lens is mounted. The lens barrel may be coupled to the interior of the coil holder 110 in various ways.

[0058] For example, a female thread can be formed on the inner circumferential surface of the coil holder 110, and a male thread corresponding to the female thread can be formed on the outer circumferential surface of the lens barrel, and the lens barrel can be threadedly connected to the coil holder 110. However, the implementation is not limited to this; the lens barrel can be directly fixed to the interior of the coil holder 110 by methods other than threaded coupling without forming threads on the inner circumferential surface of the coil holder 110. Alternatively, one or more lenses can be integrated with the coil holder 110 without having a lens barrel.

[0059] The lens coupled to the lens barrel can be a single lens, or two or more lenses can be configured to form an optical system.

[0060] The autofocus function can be controlled according to the direction of the current and is achieved by moving the coil holder 110 along a first direction. For example, the coil holder 110 can move upward from the initial position when a positive current is applied and can move downward from the initial position when a reverse current is applied. Alternatively, the amount of current in one direction can be adjusted to increase or decrease the distance moved in one direction from the initial position.

[0061] The upper and lower surfaces of the coil frame 110 may have multiple upper support protrusions and multiple lower support protrusions. The upper support protrusions may be formed in a cylindrical or prismatic shape and coupled to and fixed to the upper elastic member 150. Like the upper support protrusions, the lower support protrusions may be formed in a cylindrical or prismatic shape and coupled to and fixed to the lower elastic member 160.

[0062] Here, the upper elastic member 150 may have a through hole corresponding to the upper support protrusion, and the lower elastic member 160 may have a through hole corresponding to the lower support protrusion. The corresponding support protrusions and through holes can be fixedly connected by heat bonding or an adhesive such as epoxy resin.

[0063] The housing 140 has a hollow cylindrical shape for supporting the first magnet 130 and may be generally rectangular. The first magnet 130 and the support member 220 may be coupled to the side surface of the housing 140. As described above, the coil frame 110, guided by the elastic members 150 and 160 to move in a first direction, may be arranged inside the housing 140.

[0064] The upper elastic member 150 and the lower elastic member 160 can be coupled to the housing 140 and the coil frame 110. The upper elastic member 150 and the lower elastic member 160 can elastically support the upward and / or downward movement of the coil frame 110 in the direction of the arrow. The upper elastic member 150 and the lower elastic member 160 can be formed as leaf springs.

[0065] like Figure 2 As shown, the upper elastic member 150 may include multiple parts that are separated from each other. With this multi-divided structure, the divided portions of the upper elastic member 150 can be supplied with currents of different polarities or different powers. The lower elastic member 160 may also have a multi-divided structure and be electrically connected to the upper elastic member 150.

[0066] The upper elastic member 150, the lower elastic member 160, the coil frame 110, and the housing 140 can be assembled by thermal bonding and / or by bonding with adhesives or the like.

[0067] Position detection sensor 170 can be coupled to coil holder 110 and move together with coil holder 110. Position detection sensor 170 can sense the displacement of coil holder 110 along a first direction and output the sensing result as a feedback signal. The displacement of coil holder 110 along the first direction can be controlled using the sensing result of the displacement of coil holder 110 along the first direction as a feedback signal.

[0068] The position detection sensor 170 may be a sensor configured to sense changes in magnetic force emitted from the first magnet 130. Alternatively, the position detection sensor 170 may include a Hall sensor, an angular velocity sensor, and an acceleration sensor.

[0069] However, this is merely illustrative; the position detection sensor 170 of this disclosure is not limited to a Hall sensor, and any sensor capable of sensing changes in magnetic force can be used. Any sensor capable of sensing position other than magnetic force can be employed. For example, a light reflector can be used.

[0070] The position detection sensor 170 can be coupled to the coil holder 110 or the housing 140 in various forms, and current can be applied to the position detection sensor 170 in various ways depending on the arrangement of the position detection sensor 170.

[0071] like Figure 1 As shown, for example, the position detection sensor 170 can be indirectly coupled to the coil holder 110. As shown, the position detection sensor 170 can be coupled to the sensor substrate 180 and the sensor substrate 180 can be coupled to the coil holder 110. That is, the position detection sensor 170 can be indirectly coupled to the coil holder 110 through the sensor substrate 180.

[0072] In this case, the sensing magnet can be arranged separately from the first magnet 130, or the first magnet 130 can be used as the sensing magnet.

[0073] In the following description, the position detection sensor 170 will be coupled to the coil frame 110 via the sensor substrate 180 and used as a sensing magnet by the first magnet 130, but the implementation is not limited thereto.

[0074] The base 210 can be arranged below the coil holder 110 and is generally rectangular in shape, and the printed circuit board 250 can be arranged or housed on the base 210.

[0075] A support groove is formed on the surface of the base 210 facing a portion of the printed circuit board 250. The size of the support groove corresponds to a portion of the printed circuit board 250 where a terminal surface 253 is provided. The support groove can be recessed to a certain depth from the outer peripheral surface of the base 210 so that the portion where the terminal surface 253 is provided does not protrude outward or the degree of protrusion can be adjusted.

[0076] The support member 220 may be arranged on a side surface of the housing 140, spaced apart from the housing 140, and the support member 220 has an upper side coupled to the upper elastic member 150 and a lower side connected to the base 210, the printed circuit board 250, or the circuit member 231. The support member may support the coil holder 110 and the housing 140 such that the coil holder 110 and the housing 140 may move along a second direction and / or a third direction perpendicular to the first direction and may be electrically connected to the first coil 120.

[0077] Since the support members 220 according to the embodiment are arranged on the outer surface of the corner of the housing 140 and spaced apart from the outer surface of the corner of the housing 140, four pairs of support members 220 or eight support members 220 can be symmetrically installed. In this embodiment, each pair of support members 220 is arranged adjacent to each other, and each pair of support members 220 is arranged at the corner of the housing 140. However, four or six support members 220 can be arranged individually or in pairs at each corner of the housing 140.

[0078] At least a portion of the support member 220 may be electrically connected to the upper elastic member 150. That is, for example, the support member 220 may be electrically connected to a portion of the upper elastic member 150 in which a through hole is formed.

[0079] Since the support member 220 and the upper elastic member 150 are formed separately, the support member 220 and the upper elastic member 150 can be electrically connected by conductive adhesive, solder, or the like. Therefore, the support member 220, which is electrically connected to the upper elastic member 150, can apply current to the first coil 120.

[0080] The support member 220 can be connected to the printed circuit board 250 via through-holes formed in the circuit member 231 and the printed circuit board 250. Alternatively, the through-holes may not be formed in the circuit member 231 and / or the printed circuit board 250, and the support member 220 may be electrically soldered to a corresponding portion of the circuit member 231.

[0081] exist Figure 2 The diagram shows a linear support member 220 as one embodiment, but the embodiment is not limited to this. That is, the support member 220 can be provided in the form of a plate member or the like.

[0082] The second coil 230 can move the housing 140 in a second direction and / or a third direction through electromagnetic interaction with the first magnet 130 to perform hand shake correction.

[0083] Here, the second and third directions can include directions substantially close to the x-axis (or the first direction) and the y-axis (or the second direction), as well as the x-axis direction and the y-axis direction. That is, in terms of the drive in the embodiment, the housing 140 can move parallel to the x-axis and y-axis, or the housing 140 can be slightly tilted relative to the x-axis and y-axis when the housing 140 is moved supported by the support member 220.

[0084] Therefore, the first magnet 130 needs to be installed at a position corresponding to the second coil 230.

[0085] The second coil 230 can be arranged facing the first magnet 130 fixed to the housing 140. In one embodiment, the second coil 230 can be arranged outside the first magnet 130. Alternatively, the second coil 230 can be arranged on the underside of the first magnet 130 and spaced a predetermined distance from the first magnet 130.

[0086] According to the embodiment, a total of four second coils 230 may be provided on the four side portions of the circuit member 231, but the embodiment is not limited to this. For example, only two coils may be provided, with one coil for the second direction and the other coil for the third direction, or four or more coils may be provided.

[0087] Alternatively, the six second coils can be arranged such that one coil for the second direction is arranged on the first side, two coils for the second direction are arranged on the second side, one coil for the third direction is arranged on the third side, and two coils for the third direction are arranged on the fourth side. Alternatively, in this case, the first and fourth sides can be adjacent to each other, and the second and third sides can be adjacent to each other.

[0088] In one embodiment, a circuit pattern in the shape of a second coil 230 may be formed on the circuit component 231, or a separate second coil may be arranged on the circuit component 231. However, the embodiment is not limited to this, and a circuit pattern in the shape of a second coil 230 may be directly formed on the component 231.

[0089] Alternatively, the second coil 230 can be formed by winding wire into a loop or by being configured as an FP coil and electrically connected to the printed circuit board 250.

[0090] The circuit component 231, including the second coil 230, can be mounted or arranged on the upper surface of the printed circuit board 250, which is disposed on the upper side of the base 210. However, the implementation is not limited thereto. The second coil 230 can be arranged to be in close contact with the base 210, spaced apart from the base 210, or formed on a separate substrate that is stacked on and connected to the printed circuit board 250.

[0091] The printed circuit board 250 can be electrically connected to at least one of the upper elastic member 150 and the lower elastic member 160 and coupled to the upper surface of the base 210, and as... Figure 2 As shown, the printed circuit board 250 may have through holes at positions corresponding to the ends of the support member 220. Alternatively, the printed circuit board 250 may be electrically connected to and / or coupled to the support member without the through holes.

[0092] Terminals 251 may be arranged or formed on the printed circuit board 250. The terminals 251 may be arranged on a curved terminal surface 253. Multiple terminals 251 may be arranged on the terminal surface 253 to receive external power to supply current to the first coil 120 and / or the second coil 230. The number of terminals formed on the terminal surface 253 may be increased or decreased depending on the type of component that needs to be controlled. Additionally, the printed circuit board 250 may have one or more terminal surfaces 253.

[0093] The cover member 300 can be generally formed in the shape of a box and can accommodate the movable unit, the second coil 230, a portion of the printed circuit board 250, etc., and the cover member 300 can be coupled to the base 210. The cover member 300 can protect the movable unit, the second coil 230, the printed circuit board 250, etc. housed therein from damage and further limit the leakage of the electromagnetic field generated by the first magnet 130, the first coil 120, the second coil 230, etc., so as to concentrate the electromagnetic field.

[0094] Figure 3 A plan view of a lens drive device with the cover member removed according to an embodiment is shown. Figure 4 yes Figure 3 Perspective view. Figure 5 A plan view showing the arrangement of the upper elastic member 150 and the first magnet in the lens driving device according to an embodiment.

[0095] like Figures 3 to 5 As shown, in one embodiment, the upper elastic member 150 can be divided into multiple portions, and at least two of the portions can be arranged parallel to each other in a second direction or in a third direction in the xy plane. The at least two portions can be arranged such that one end of each of the at least two portions is positioned opposite the ends of the other portions.

[0096] Additionally, the upper elastic member 150 can be arranged such that at least some of the portions are symmetrical or not perfectly symmetrical but correspond to each other in the xy plane about the center of the coil frame.

[0097] For example, the upper elastic member 150 may be divided into multiple parts, and at least two of the parts may be arranged adjacent to each other and parallel in a second direction or a third direction. The separate upper elastic members 150 may have a point-symmetric or nearly point-symmetric shape about the center of the coil frame 110 in the xy plane.

[0098] Here, point symmetry refers to the symmetry where two shapes overlap when rotated 180 degrees about a center of rotation. (See reference...) Figures 3 to 5In this embodiment, the first upper elastic member 150-1 and the second upper elastic member 150-2 can be symmetrical about the center point of the coil frame 110.

[0099] exist Figures 3 to 5 In the middle, two adjacent parts of the upper elastic member 150 can be arranged in parallel in the x-axis direction, that is, in the second direction, or have sections arranged in parallel to each other.

[0100] In addition, two parts arranged adjacent to each other in the second direction can face two other parts located on opposite sides of the coil frame 110 and arranged adjacent to each other in the second direction.

[0101] However, in another embodiment, it is apparent that two adjacent portions of the upper elastic member 150 may be arranged in parallel in the y-axis direction, i.e., in the third direction, or have sections arranged in parallel to each other.

[0102] In addition, two parts arranged adjacent to each other in the third direction can face two other parts located on opposite sides of the coil frame 110 and arranged adjacent to each other in the third direction.

[0103] In other words, every two of the four parts can be formed on each side and arranged in one of the second and third directions, and each of the two parts can be formed on each side and arranged in the other direction. However, the implementation is not limited to this. The number of divided portions of the member 150 arranged in the two directions can be adjusted differently. If the number of divided portions of the upper elastic member 150 is adjusted, the elastic modulus of the upper elastic member 150 can be adjusted accordingly.

[0104] Due to the aforementioned structure, the elastic modulus, spring constant, or stiffness of the upper elastic member 150 can be increased in the second or third direction. In particular, when the lens drive device performs autofocus or image stabilization, mechanical resonance caused by the tilting motion of the coil holder 110 can be suppressed or reduced.

[0105] That is, the housing 140 or the coil frame 110 can tilt or shift, i.e., move or rotate horizontally to induce vibration, and resonance may occur due to the vibration. The amplitude, magnitude, etc. of the resonance can be reduced due to the high elastic modulus, spring constant, or stiffness of the upper elastic member 150 in the second or third direction.

[0106] In all cases, and when the lens drive performs autofocus at the natural vibration frequency of the product, spring, or elastic component, primary resonance, second-order resonance, and third-order resonance can occur.

[0107] When the lens drive device performs autofocus, the primary resonant frequency can be generated by the movement of the coil holder 110 along the first direction, and the second-order resonance can be generated by the tilting of the housing 140 or the coil holder 110 relative to the first direction. The second-order or third-order resonant frequencies may cause offset or rotation. However, depending on the shape of the product, spring, or elastic member, offset may correspond to the second-order resonance, tilt may correspond to the third-order resonance, and rotation may correspond to the fourth-order resonance.

[0108] That is, when performing autofocus, depending on the shape of the product, spring or elastic component, the main resonant frequency can occur in the first direction, and the tilt, offset and rotation that occur in the second or third direction can correspond to the second, third and fourth order resonances.

[0109] When the lens drive device performs hand shakiness correction, a principal resonant frequency can be generated when the housing 140 moves along a second direction (or the x-axis direction) or a third direction (the y-axis direction). Rotation of the housing 140 relative to the second or third direction can correspond to a second-order resonant frequency, and offset or tilt can correspond to a third-order resonant frequency. However, the principal resonant frequency can be generated in the second or third direction, and the tilt, offset, and rotation relative to the second or third direction can be second, third, or fourth-order frequencies, depending on the shape of the product, spring, or elastic member.

[0110] The upper elastic member 150 may include a first upper elastic member to an eighth upper elastic member depending on the corresponding portion of the upper elastic member 150. That is, the first upper elastic member to the eighth upper elastic member may constitute a corresponding portion of the upper elastic member 150, and all or part of said portion may be coupled to the housing 140 or the coil frame 110 to elastically support the movement of the coil frame 110 along a first direction.

[0111] That is, one side of the upper elastic member 150-1 can be connected to the first coil 120, the opposite side of the upper elastic member 150-1 can be connected to the support member 220, and a portion of the upper elastic member 150-1 can be arranged in the second direction or the third direction. However, in this embodiment, most of the first upper elastic member 150-1 is shown to be arranged generally in the x-axis direction, i.e., the second direction.

[0112] Of course, in other embodiments, a large portion of the first upper elastic member 150-1 may be arranged generally in the y-axis direction, i.e., the third direction. In the following, for simplicity, embodiments in which the first to eighth upper elastic members, which are allowed to be arranged in either the second or third direction, are arranged in only one of the second and third directions will be shown and described.

[0113] The second upper elastic member 150-2 can be arranged facing the first upper elastic member 150-1, wherein the center of the coil frame 110 is located between the first elastic member 150-1 and the second upper elastic member 150-2. For example, the second upper elastic member 150-2 and the first upper elastic member 150-1 can be point-symmetric about the center of the coil frame 110, have a point-symmetric shape, or be located in a position closely forming point symmetry in the xy plane.

[0114] Similar to the first upper elastic member 150-1, the second upper elastic member 150-2 may have a side connected to the first coil 120 and an opposite side connected to the support member 220.

[0115] like Figure 5 As shown, the first upper elastic member 150-1 or the second upper elastic member 150-2 may include a first coil coupling portion 150a, a first support member coupling portion 150b, and a first connector 150c.

[0116] The first coil coupling portion 150a can be electrically connected to the end 121 of the first coil 120. The first coil coupling portion 150a can be electrically coupled to the end 121, i.e., the top portion, of the first coil 120 by solder, conductive adhesive, etc.

[0117] The first support member coupling portion 150b can be electrically connected to the end of the support member 220. In an embodiment, the first support member coupling portion 150b may be provided with a hole or groove for coupling with the linear support member 220, and the upper end of the support member 220 may be inserted into or arranged in the hole or groove.

[0118] The support member 220 can be electrically connected to the coupling portion 150b of the first support member by means of solder, conductive adhesive, etc.

[0119] Therefore, the first coil 120 can be electrically connected to the printed circuit board 250 via the first upper elastic member 150-1 and the support member 220, thereby providing the required current from the printed circuit board 250 for the operation of the coil holder 110.

[0120] At least a portion of the first connector 150c may be arranged in the second direction and / or the third direction and used to connect the first coil coupling portion 150a and the first support member coupling portion 150b to each other. In this embodiment, the first connector 150c is shown as being arranged integrally in the second direction.

[0121] Reference Figures 3 to 5The first connector 150c of the first upper elastic member 150-1 and the first connector 150c of the second upper elastic member 150-2 can be arranged to be adjacent to and parallel to portions of the third upper elastic member 150-3 and the fourth upper elastic member 150-4, respectively, and have sections arranged parallel to the third upper elastic member 150-3 and the fourth upper elastic member 150-4 in the second direction.

[0122] Due to the structure of the first connector 150c, in the embodiment, the elastic modulus, spring constant, or stiffness of the upper elastic member 150 may increase when the first upper elastic member 150-1 and the second upper elastic member 150-2 are not provided.

[0123] Due to this structure that increases the elastic modulus, spring constant, or stiffness, when the lens drive device performs autofocus or shakiness correction, the upper elastic member 150 can reduce the amplitude or magnitude of the resonance caused by the tilting or offset rotation of the housing 140 or the coil frame 110, thereby attenuating or reducing the resonance.

[0124] In the embodiment, since the two ends 121 of the first coil 120 are electrically connected to the printed circuit board 250, current can be applied to the first coil 120. The two ends 121 of the first coil 120 can be electrically connected to the printed circuit board 250 through the first upper elastic member 150-1 and the second upper elastic member 150-2 respectively.

[0125] One side of the third upper elastic member 150-3 can be coupled to the coil holder 110 and electrically connected to the position detection sensor 170, and the opposite side of the third upper elastic member 150-3 can be coupled to the housing and electrically connected to the support member 220.

[0126] The third upper elastic member 150-3 can be arranged in the xy plane parallel to the first upper elastic member 150-1, and the third upper elastic member 150-3 has a side end arranged to face the side end of the first upper elastic member 150-1.

[0127] For example, a portion of the third upper elastic member 150-3 may be arranged in the xy plane parallel to the first upper elastic member 150-1 in the same direction. Thus, as described above, the first upper elastic member 150-1 and the third upper elastic member 150-3 may be arranged parallel to each other to increase the elastic modulus, spring constant, or stiffness of the overall upper elastic member 150.

[0128] One side of the third upper elastic member 150-3 can be electrically connected to the position detection sensor 170, and the other side of the third upper elastic member 150-3 can be connected to the support member 220. Although not shown, one side of the third upper elastic member 150-3 can be electrically connected to the position detection sensor 170 via a conductive wire or other conductive member.

[0129] like Figure 5 As shown, the other side of the third upper elastic member 150-3 may be provided with a hole into which the support member 220 is inserted, and the upper end of the support member 220 may be coupled to the third upper elastic member 150-3 by solder, conductive adhesive, etc.

[0130] Therefore, the position detection sensor 170 can be electrically connected to the printed circuit board 250 via the third upper elastic member 150-3 and the support member 220, and the position detection sensor 170 can sense the displacement value of the coil frame 110 along the first direction by the current applied from the printed circuit board 250 to the position detection sensor 170, or transmit the sensed displacement value as a feedback signal to the printed circuit board 250.

[0131] The number of portions of the upper elastic member 150 electrically connected to the position detection sensor 170 can be adjusted according to the number of input and output terminals set to the position detection sensor 170.

[0132] The number of parts electrically connected to the position detection sensor 170 can be equal to the number of input terminals and output terminals of the position detection sensor 170.

[0133] In one embodiment, the position detection sensor 170 may be provided with two input terminals and two output terminals. Therefore, the upper elastic member 150 may need to have a total of four parts for electrical connection to the position detection sensor 170, but the embodiment is not limited to this.

[0134] Reference Figures 3 to 5 In an embodiment, the third, fourth, fifth and sixth upper elastic members may be electrically connected to the position detection sensor 170 to apply current to the position detection sensor 170 or may be used as an electrical path, wherein the value of the displacement of the coil frame 110 along the first direction is transmitted as a feedback signal along the electrical path to the printed circuit board 250.

[0135] The fourth upper elastic member 150-4 can be arranged in the xy plane parallel to the second upper elastic member 150-2, and the fourth upper elastic member 150-4 has a side end arranged facing the side end of the second upper elastic member 150-2.

[0136] For example, the fourth upper elastic member 150-4 may have a shape in the xy plane that is symmetrical to the third upper elastic member 150-3 about the center point of the coil frame 110 and located at a position symmetrical to its formation point.

[0137] Additionally, one side of the fourth upper elastic member 150-4 can be coupled to the coil holder 110 and electrically connected to the position detection sensor 170. The opposite side of the fourth upper elastic member 150-4 can be coupled to the housing 140 and electrically connected to the support member 220. As described above with respect to the third upper elastic member 150-3, the fourth upper elastic member 150-4 is electrically connected to the position detection sensor 170 and the support member 220.

[0138] Furthermore, a portion of the fourth upper elastic member 150-4 can be arranged in the xy plane parallel to the second upper elastic member 150-2 in the same direction. Therefore, as described above, the second upper elastic member 150-2 and the fourth upper elastic member 150-4 can be arranged as a whole in parallel, and thus the elastic modulus, spring constant, or stiffness of the entire upper elastic member 150 may increase.

[0139] One side of the fifth upper elastic member 150-5 can be coupled to the coil holder 110 and electrically connected to the position detection sensor 170. The opposite side of the fifth upper elastic member 150-5 can be coupled to the housing 140 and electrically connected to the support member 220. As described above with respect to the third upper elastic member 150-3, the fifth upper elastic member 150-5 is electrically connected to the position detection sensor 170 and the support member 220.

[0140] Additionally, a portion of the fifth upper elastic member 150-5 may be arranged in the xy plane perpendicular to a portion of the first upper elastic member 150-1 or a portion of the second upper elastic member 150-2. The fifth upper elastic member 150-5 may include a first coil frame coupling portion 150-5a, a second support member coupling portion 150-5b, and a second connector 150-5c.

[0141] The first coil frame coupling portion 150-5a is the portion coupled to the coil frame 110 and electrically connected to the position detection sensor 170. The second support member coupling portion 150-5b is the portion coupled to the housing 140 and electrically connected to the support member 220.

[0142] The second connector 150-5c can be used to connect the first coil frame coupling portion 150-5a and the second support member coupling portion 150-5b to each other. For example, at least a portion of the second connector 150-5c can be arranged in the xy plane perpendicular to a portion of the first upper elastic member 150-1 or a portion of the second upper elastic member 150-2.

[0143] The fifth upper elastic member 150-5 can be arranged perpendicular to a part of the third upper elastic member 150-3 or a part of the fourth upper elastic member 150-4, and the overall shape of the fifth upper elastic member 150-5 can be the same as or similar to the shape of the fourth upper elastic member 150-4.

[0144] The sixth upper elastic member 150-6 can be arranged to face the fifth upper elastic member 150-5, wherein the center of the coil frame is located between the sixth upper elastic member 150-6 and the fifth upper elastic member 150-5. For example, the sixth upper elastic member 150-6 can have a shape in the xy plane that is point-symmetric to the fifth upper elastic member 150-5 about the center of the coil frame 110 and is located at a position symmetric to its formation point.

[0145] Additionally, one side of the sixth upper elastic member 150-6 can be coupled to the coil holder 110 and electrically connected to the position detection sensor 170. The opposite side of the sixth upper elastic member 150-6 can be coupled to the housing 140 and electrically connected to the support member 220. As described above with respect to the third upper elastic member 150-3, the sixth upper elastic member 150-6 is electrically connected to the position detection sensor 170 and the support member 220.

[0146] Additionally, a portion of the sixth upper elastic member 150-6 may be arranged in the xy plane perpendicular to a portion of the first upper elastic member 150-1 or a portion of the second upper elastic member 150-2. The sixth upper elastic member 150-6 may include a second coil frame coupling portion 150-6a, a third support member coupling portion 150-6b, and a third connector 150-6c.

[0147] The second coil frame coupling portion 150-6a is the portion coupled to the coil frame 110 and electrically connected to the position detection sensor 170. The third support member coupling portion 150-6b is the portion coupled to the housing 140 and electrically connected to the support member 220.

[0148] The third connector 150-6c can be used to connect the second coil frame coupling portion 150-6a and the third support member coupling portion 150-6b to each other. For example, at least a portion of the third connector 150-6c can be arranged in the xy plane perpendicular to a portion of the first upper elastic member 150-1 or a portion of the second upper elastic member 150-2.

[0149] The sixth upper elastic member 150-6 may be arranged perpendicular to a portion of the third upper elastic member 150-3 or a portion of the fourth upper elastic member 150-4, and the shape of the sixth upper elastic member 150-6 may be the same as or similar to the shape of the third upper elastic member 150-3 or the fourth upper elastic member 150-4.

[0150] The seventh upper elastic member 150-7 can be coupled to the housing 140 and the support member 220 and is arranged to face the second connector 150-5c. For example, the seventh upper elastic member 150-7 can have a shape that is line-symmetrical with the second connector 150-5c in the xy plane and be located at a position that is line-symmetrical with its formation.

[0151] Linear symmetry refers to the symmetry between two shapes when they overlap each other when folded around a central line. (See reference...) Figures 3 to 5 In the embodiment, the second connector 150-5c of the fifth upper elastic member 150-5 and the seventh upper elastic member 150-7 can be linearly symmetrical to each other in the xy plane with respect to the virtual line represented as y=x.

[0152] The eighth upper elastic member 150-8 may be coupled to the housing 140 and the support member 220 and arranged to face the third connector 150-6c. For example, the eighth upper elastic member 150-8 may have a shape in the xy plane that is line-symmetrical with the third connector 150-6c and located at a position symmetrical to its forming line.

[0153] Reference Figures 3 to 5 In the embodiment, the third connector 150-6c of the sixth upper elastic member 150-6 and the eighth upper elastic member 150-8 can be symmetrical in the xy plane with respect to the virtual line represented as y=-x.

[0154] In addition, such as Figures 3 to 5 As shown, the seventh upper elastic member 150-7 and the eighth upper elastic member 150-8 can be arranged symmetrically with respect to the center of the coil frame 110, or they can be arranged to correspond to each other but not completely symmetrically. For example, the seventh upper elastic member 150-7 and the eighth upper elastic member 150-8 can have a shape that is point-symmetric with respect to the center of the coil frame 110 and are located at positions where the seventh upper elastic member 150-7 and the eighth upper elastic member 150-8 form a point symmetry.

[0155] In the implementation method, such as Figures 3 to 5 As shown, the fifth upper elastic member 150-5 and the seventh upper elastic member 150-7 can be spaced apart from each other and arranged separately. The sixth upper elastic member 150-6 and the eighth upper elastic member 150-8 can also be spaced apart from each other and arranged separately.

[0156] In this structure, the connecting portions of the support members 220 of the first upper elastic member to the eighth upper elastic member 150-8 are arranged radially relative to the center of the coil frame 110. Therefore, when the lens drive device performs autofocus or image stabilization, the driving force can be evenly distributed without being biased towards the first or second direction.

[0157] In another embodiment, although not shown, the fifth upper elastic member 150-5 and the seventh upper elastic member 150-7 may be integrally formed. Furthermore, the sixth upper elastic member 150-6 and the eighth upper elastic member 150-8 may be integrally formed.

[0158] When the seventh upper elastic member 150-7 and the eighth upper elastic member 150-8 are separately provided from the fifth upper elastic member 150-5 and the sixth upper elastic member 150-6, the seventh upper elastic member 150-7 and the eighth upper elastic member 150-8 are mechanically coupled to the support member 220 without involving the electrical connection of the lens drive device.

[0159] That is, in this embodiment, the number of channels electrically connected to the printed circuit board 250 is six, including four channels of the position detection sensor 170 and two channels of the first coil 120. Therefore, the fifth upper elastic member 150-5 and the seventh upper elastic member 150-7 can be integrally formed, and the sixth upper elastic member 150-6 and the eighth upper elastic member 150-8 can be integrally formed, so that the first upper elastic member 150-1 and the second upper elastic member 150-2 are electrically connected to the first coil 120 and the third to sixth upper elastic members 150-6 can be electrically connected to the position detection sensor 170.

[0160] More precisely, in order to prevent the driving force from being biased along the first or second direction when the lens drive device performs autofocus or shakiness correction, the fifth upper elastic member 150-5 and the seventh upper elastic member 150-7 can be integrally formed, and the sixth upper elastic member 150-6 and the eighth upper elastic member 150-8 can be integrally formed.

[0161] In this configuration, the integrated fifth and seventh upper elastic members 150-7, as well as the integrated sixth and eighth upper elastic members 150-8, can be symmetrical with respect to the center of the coil holder 110, or they can correspond to each other but are not perfectly symmetrical. This limits the bias of the driving force of the lens drive device along the first or second direction during autofocus or image stabilization. Furthermore, due to this symmetrical structure, the coil holder can be supported so that it does not bias in either direction when the coil holder moves vertically.

[0162] In order to electrically connect the position detection sensor 170, which requires four electrical connection channels, and the first coil 120, which requires two electrical connection channels, to the printed circuit board 250, the upper elastic member 150 is preferably divided into at least six parts.

[0163] As in Figures 3 to 5In the embodiment shown, if the upper elastic member 150 is configured such that the first to eighth upper elastic members are arranged symmetrically or oppositely to the center of the coil frame 110, then when the lens drive device performs autofocus or shakiness correction as described above, the driving force of the lens drive device can be limited to be biased in any direction or the driving force can be evenly distributed.

[0164] like Figure 5 As shown, the position detection sensor 170 can face the first magnet 130 in a third-party direction and also face the first upper elastic member 150-1 or the second upper elastic member 150-2.

[0165] Figure 6 This is a plan view showing a portion of the construction of a lens driving device according to an embodiment. Figure 7 yes Figure 6 Side view.

[0166] The coil holder 110 may have a coupling protrusion 111 on its upper part, and the end 121 of the first coil 120 may be wound around the coupling protrusion 111. The end 121 of the first coil 120 and the first coil coupling portion 150a may be soldered to couple and electrically connect to each other.

[0167] Since the two electrical connection channels of the first coil 120, namely the two ends 121, can be connected to the first upper elastic member 150-1 and the second upper elastic member 150-2 respectively, the protrusions 111 can also be arranged in pairs. Thus, the ends 121 of the first coil 120 can be wound around the corresponding coupling protrusions 111, and the first upper elastic member 150-1 and the second upper elastic member 150-2 can be soldered to the ends 121 of the first coil 120 at each coupling protrusion of the coupling protrusions 111.

[0168] Here, the end 121 of the first coil 120 may be soldered to the first coil coupling portion 150a at its winding portion. The end 121 of the first coil 120 and the first coil coupling portion 150a may be electrically connected to each other by means of conductive adhesive instead of soldering.

[0169] A pair of coupling protrusions 111 can be arranged in the xy plane in a manner symmetrical or corresponding to each other with respect to the center of the coil frame 110. The symmetrical structure of the pair of coupling protrusions 111 is intended to arrange the first upper elastic member 150-1 and the second upper elastic member 150-2 in a manner symmetrical or corresponding to each other.

[0170] When the lens drive device performs hand tremor correction, if the center of gravity of the coil frame 110, housing 140, etc., is distributed on the lower side, the elastic modulus, spring constant, or stiffness of the lower elastic member 160 needs to be increased to reduce unnecessary tilting or offset of the coil frame 110 or housing 140. If the center of gravity of the coil frame 110, housing 140, etc., is distributed on the upper side, the operation can be performed on the opposite side.

[0171] Therefore, the lower elastic member 160 can be integrally formed rather than divided. This integral lower elastic member 160 can increase its elastic modulus, spring constant, or stiffness to suppress tilting or displacement of the coil frame 110 or the housing 140.

[0172] When the upper elastic member 160 is integrally formed, as described above, the upper elastic member 150 can be divided into at least six parts to electrically connect the first coil 120 and the position detection sensor 170 to the printed circuit board 250.

[0173] Alternatively, the width and thickness of each frame of the lower elastic member 160 can be increased to increase the elastic modulus, spring constant, or stiffness.

[0174] The lower elastic member 160 with the above structure can also attenuate the resonance caused by the tilt or offset of the coil frame 110 or the housing 140 when the lens drive device performs autofocus.

[0175] Figure 8 This is a plan view showing the arrangement of the upper elastic member 150 and the first magnet 130 in a lens driving device according to another embodiment.

[0176] like Figure 8 As shown, the position detection sensor 170 can face the first magnet 130 in the second direction, and also face the fifth upper elastic member 150-5 or the sixth upper elastic member 150-6.

[0177] In this structure, the vibrations and corresponding resonances caused by the tilting of the coil frame 110 or the housing 140 in the xz plane or the offset along the second direction can be attenuated by the first and third upper elastic members and the second and fourth upper elastic members 150-4 arranged in parallel and having increased elastic modulus, spring constant or stiffness.

[0178] Due to this attenuation effect, the position detection sensor 170 can more accurately detect the displacement of the coil frame 110 in the first direction.

[0179] That is, vibrations caused by the tilt and / or offset of the coil holder 110 may lead to false sensing by the position detection sensor 170 coupled to the coil holder. Therefore, in order to reduce false sensing caused by the tilt and / or offset of the coil holder 110 of the position detection sensor 170, the elastic modulus in the direction parallel to the direction in which the position detection sensor 170 and the first magnet 130 face each other can be increased compared to the elastic modulus in the direction perpendicular to the direction in which the position detection sensor 170 and the first magnet 130 face each other.

[0180] Furthermore, since the position detection sensor 170 is movable, reducing the elastic modulus in the horizontal direction of the portion coupled to the position detection sensor 170 can increase the elastic modulus of adjacent portions, thereby suppressing or mitigating the resonance of the coil frame 110 through the upper elastic member 150, and thus reducing the effects of tilting or offset of the coil frame 110 coupled to the position detection sensor 170. Additionally, the arrangement of the position detection sensor 170 can be reversed at any time if the design is improved.

[0181] like Figure 8 As shown, the fifth upper elastic member 150-5 and the sixth upper elastic member 150-6 can be arranged in a direction perpendicular to the direction in which the position detection sensor 170 and the first magnet 130 face each other, and the first upper elastic member to the fourth upper elastic member can be arranged in a direction parallel to the direction in which the position detection sensor 170 and the first magnet 130 face each other.

[0182] Using this structure, with Figure 5 Compared to the embodiment shown, even if vibration occurs due to the tilt and / or offset of the coil holder 110, the movement of the position detection sensor 170 can still be suppressed by the first upper elastic member to the fourth upper elastic member and erroneous sensing can be reduced.

[0183] Figure 9 A graph showing the results of frequency response analysis of the lens driving device according to an embodiment is provided. Figure 10 To show Figure 9 The graph in section A shows the results of frequency response analysis when the lens drive is performing autofocus. The lens drive is shown to exhibit the characteristics of the feedback frequency after PID control for autofocus.

[0184] Frequency response analysis is typically used as a method to check the stability of systems such as lens drive mechanisms against mechanical vibrations, and a detailed description of the frequency response analysis will be omitted.

[0185] exist Figure 9 and Figure 10In the diagram, part A represents the second-order resonance point. That is, this is the point of resonance caused by the tilting or movement of the housing 140 or the coil frame 110, resulting in vibration in the second or third direction.

[0186] exist Figure 9 In the diagram, L1 represents the phase of the frequency related to the movement of the coil frame 110 in the lens driving device of this embodiment along the first direction, and L2 represents the gain of the frequency of the coil frame 110.

[0187] In frequency response analysis, the stability at the second-order resonance point can be determined by the gain and phase. That is, as the change in gain and phase at the second-order resonance point decreases, the amplitude of the resonance can decrease. As the resonance amplitude decreases, the degree of tilting and offset vibration of the coil frame 110 caused by the resonance can be reduced, thereby enabling stable autofocus.

[0188] Figure 10 The results of frequency response analysis at the second-order resonance point are shown in the figure. Figure 10 In this context, L3 represents the phase of the frequency at the second-order resonance point when the lens drive device with an undivided upper elastic member performs autofocus.

[0189] When comparing curves L1 and L3, L3 exhibits a more abrupt phase change at the second-order resonance point than L1. Therefore, compared to the case where the upper elastic member 150 is not divided, the implementation that divides the upper elastic member 150 into 8 parts can reduce the amplitude of resonance at the second-order resonance point and allow autofocus to be performed stably.

[0190] exist Figure 10 In this context, L4 represents the gain at the second-order resonance point when a lens drive with an undivided upper elastic member performs autofocus.

[0191] When comparing curves L2 and L4, L4 exhibits a more abrupt phase change at the second-order resonance point than L2. Therefore, in the case of frequency phase, compared to the case where the upper elastic member is not divided, the implementation with the upper elastic member 150 divided into 8 parts can significantly reduce the resonance amplitude at the second-order resonance point and allow autofocus to be performed stably for the frequency gain result.

[0192] In this embodiment, the upper elastic member 150 may be divided into multiple parts, and some of these parts may be arranged in parallel to increase the elastic modulus, spring constant, or stiffness of the upper elastic member 150. Therefore, when the lens drive device is operating, unnecessary tilting and offset of the coil holder 110 or housing 140 can be suppressed.

[0193] Furthermore, when the lens drive device performs autofocus, it can suppress the tilt and offset of the coil holder 110 or the housing 140, and suppress the resonance caused therefrom.

[0194] Furthermore, it is easy to ensure gain margin and / or phase margin to improve stability against mechanical resonance.

[0195] Furthermore, the lens driving device according to the above embodiments can be used in various fields, such as camera device modules. For example, camera device modules can be applied to mobile devices such as cellular phones.

[0196] The camera module according to the embodiment may include a lens barrel coupled to the coil holder 110, an image sensor (not shown), a printed circuit board 250, and an optical system.

[0197] The lens barrel is constructed as described above, and the printed circuit board 250 can form the bottom surface of the camera module as the part on which the image sensor is mounted.

[0198] Furthermore, the optical system may include at least one lens for transmitting images to an image sensor. The optical system may be equipped with an actuator module capable of performing both autofocus and image stabilization functions. The actuator module performing the autofocus function can be configured in various ways and typically uses a voice coil motor. The lens drive device according to the above embodiment can be used as an actuator module performing both autofocus and image stabilization functions.

[0199] The camera module may also include an infrared blocking filter (not shown). The infrared blocking filter blocks infrared light from incident on the image sensor. In this case, the infrared blocking filter can be installed near the image sensor. Figure 2 At a corresponding position on the base 210 exemplarily shown, an infrared blocking filter can be coupled to a retainer member (not shown). Furthermore, the base 210 can support the underside of the retainer member.

[0200] Individual terminal members can be provided on the base 210 for electrical connection to the printed circuit board 250, or the terminals can be integrally formed using surface electrodes or the like. The base 210 can serve as a sensor holder for protecting the image sensor. In this case, a protrusion can be formed downward along the side surface of the base 210. However, this is not necessary. Although not shown, a separate sensor holder can be arranged below the base 210 to serve as a protrusion.

[0201] Figure 11 A perspective view of a lens driving device according to another embodiment is shown. Figure 12 An exploded perspective view of a lens driving device according to another embodiment is shown.

[0202] like Figure 11 and Figure 12 As shown, the lens driving device according to the embodiment may include a movable unit. The movable unit can perform the functions of automatic focusing of the lens and image stabilization. The movable unit may include a coil holder 1110, a first coil 1120, a first magnet 1130, a housing 1140, an upper elastic member 1150, and a lower elastic member 1160.

[0203] A coil holder 1110 is disposed inside a housing 1140, and a first coil 1120 is disposed on the outer peripheral surface of the coil holder 1110. The first coil 1120 is disposed inside a first magnet 130. The coil holder can be mounted to reciprocate in a first direction within the internal space of the housing 1140 via electromagnetic interaction between the first magnet 1130 and the first coil 1120. The first coil 1120 can be mounted on the outer peripheral surface of the coil holder 1110 to interact electromagnetically with the first magnet 1130.

[0204] The coil holder 1110 can be elastically supported by the upper elastic member 1150 and the lower elastic member 1160, and thus move along the first direction to perform an autofocus function.

[0205] The coil holder 1110 may include a lens barrel (not shown) in which at least one lens is mounted. The lens barrel may be coupled to the interior of the coil holder 1110 in various ways.

[0206] For example, a female thread can be formed on the inner circumferential surface of the coil holder 1110, and a male thread corresponding to the female thread can be formed on the outer circumferential surface of the lens barrel, and the lens barrel can be threadedly connected to the coil holder 1110. However, the implementation is not limited to this; the lens barrel can be directly fixed to the interior of the coil holder 1110 by methods other than threaded coupling without forming a thread on the inner circumferential surface of the coil holder 1110. Alternatively, without a lens barrel, one or more lenses can be integrated with the coil holder 1110.

[0207] The lens coupled to the lens barrel can be a single lens, or two or more lenses can be configured to form an optical system.

[0208] The autofocus function can be controlled according to the direction of the current and is achieved by moving the coil holder 1110 along a first direction. For example, the coil holder 1110 can move upward from the initial position when a positive current is applied and can move downward from the initial position when a reverse current is applied. Alternatively, the distance moved in one direction from the initial position can be increased or decreased by adjusting the amount of current in one direction.

[0209] The upper and lower surfaces of the coil frame 1110 may have multiple upper support protrusions and multiple lower support protrusions. The upper support protrusions may be formed in a cylindrical or prismatic shape and coupled to and fixed to the upper elastic member 1150. Like the upper support protrusions, the lower support protrusions may be formed in a cylindrical or prismatic shape and coupled to and fixed to the lower elastic member 1160.

[0210] Here, the upper elastic member 1150 may have a through hole corresponding to the upper support protrusion, and the lower elastic member 1160 may have a through hole corresponding to the lower support protrusion. The corresponding support protrusion and through hole can be firmly connected by heat bonding or an adhesive such as epoxy resin.

[0211] The housing 1140 has a hollow cylindrical shape for supporting the first magnet 130 and may be generally rectangular. The first magnet 1130 and the support member 1220 may be coupled to the side surface of the housing 1140. As described above, a coil holder 1110, guided by elastic members 1150 and 1160 to move in a first direction, may be arranged inside the housing 1140.

[0212] The upper elastic member 1150 and the lower elastic member 1160 can be coupled to the housing 1140 and the coil frame 1110. The upper elastic member 1150 and the lower elastic member 1160 can elastically support the upward and / or downward movement of the coil frame 1110 in the direction of the arrow. The upper elastic member 1150 and the lower elastic member 1160 can be formed as leaf springs.

[0213] like Figure 12 As shown, the upper elastic member 1150 may include multiple parts that are separated from each other. Through this multi-divided structure, the divided portions of the upper elastic member 1150 can be supplied with currents of different polarities or different powers. The lower elastic member 1160 may also have a multi-divided structure and be electrically connected to the upper elastic member 1150.

[0214] The upper elastic member 1150, the lower elastic member 1160, the coil frame 1110, and the housing 1140 can be assembled by thermal bonding and / or by bonding with adhesives or the like.

[0215] The base 1210 can be arranged below the coil holder 1110 and is generally rectangular in shape, and the printed circuit board 1250 can be arranged or housed on the base 1210.

[0216] A support groove is formed on the surface of the base 1210 facing a portion of the printed circuit board 1250. The size of the support groove corresponds to the portion of the printed circuit board 1250 on which the terminal surface 1253 is provided. The support groove can be recessed to a certain depth from the outer peripheral surface of the base 1210 so that the portion on which the terminal surface 1253 is provided does not protrude outward or the degree of protrusion can be adjusted.

[0217] The support member 1220 may be arranged on a side surface of the housing 1140 to be spaced apart from the housing 1140, and the support member 1220 has an upper side coupled to the upper elastic member 1150 and a lower side connected to the base 1210, the printed circuit board 1250, or the circuit member 1231. The support member may support the coil holder 1110 and the housing 1140 such that the coil holder 1110 and the housing 1140 may be movable in a second direction and / or a third direction perpendicular to the first direction and may be electrically connected to the first coil 1120.

[0218] Since the support members 1220 according to the embodiment are arranged on the outer surface of the corner of the housing 1140, at least four support members 1220 can be symmetrically arranged. Figure 12 As shown, when each pair of support members 220 is arranged on the outer surface of each corner of the housing 140, all eight support members 1220 can be arranged symmetrically.

[0219] The support member 1220 can be electrically connected to the upper elastic member 1150. That is, for example, the support member 1220 can be electrically connected to a portion of the upper elastic member 1150 where a through hole is formed.

[0220] Since the support member 1220 and the upper elastic member 1150 are formed separately, the support member 1220 and the upper elastic member 1150 can be electrically connected by conductive adhesive, welding, or the like. Therefore, the upper elastic member 1150 can apply current to the first coil 1120 through the electrically connected support member 1220.

[0221] The support member 1220 can be connected to the printed circuit board 1250 via through-holes formed in the circuit member 1231 and the printed circuit board 1250. Alternatively, the through-holes may not be formed in the circuit member 1231 and / or the printed circuit board 1250, and the support member 1220 may be electrically soldered to a corresponding portion of the circuit member 1231.

[0222] exist Figure 12 The diagram shows a linear support member 1220 as one embodiment, but the embodiment is not limited to this. That is, the support member 1220 may be provided in the form of a plate member or the like.

[0223] The second coil 1230 can move the housing 1140 in a second direction and / or a third direction to perform hand shake correction through electromagnetic interaction with the first magnet 1130.

[0224] Here, the second and third directions can include directions substantially close to the x-axis (or the first direction) and the y-axis (or the second direction), as well as the x-axis direction and the y-axis direction. That is, in terms of the drive in the embodiment, the housing 1140 can move parallel to the x-axis and y-axis, or the housing 1140 can be slightly tilted relative to the x-axis and y-axis when it moves supported by the support member 1220.

[0225] Therefore, the first magnet 1130 needs to be installed at a position corresponding to the second coil 1230.

[0226] The second coil 1230 can be arranged facing the first magnet 1130 fixed to the housing 1140. In one embodiment, the second coil 1230 can be arranged outside the first magnet 1130. Alternatively, the second coil 1230 can be arranged below the first magnet 1130 and spaced apart from the first magnet 1130 by a predetermined distance.

[0227] According to the embodiment, a total of four second coils 1230 may be provided on the four side portions of the circuit member 1231, but the embodiment is not limited to this. For example, only two coils may be provided, with one coil for the second direction and the other coil for the third direction, or four or more coils may be provided.

[0228] Alternatively, the six second coils can be arranged such that one coil for the second direction is arranged on the first side, two coils for the second direction are arranged on the second side, one coil for the third direction is arranged on the third side, and two coils for the third direction are arranged on the fourth side. Alternatively, in this case, the first and fourth sides can be adjacent to each other, and the second and third sides can be adjacent to each other.

[0229] In one embodiment, a circuit pattern in the shape of a second coil 1230 may be formed on the circuit component 1231, or a separate second coil may be arranged on the circuit component 1231. However, the embodiment is not limited to this, and a circuit pattern in the shape of a second coil 1230 may be directly formed on the component 1231.

[0230] Alternatively, the second coil 1230 can be formed by winding wire into a loop or by being configured as an FP coil and electrically connected to the printed circuit board 1250.

[0231] The circuit component 1231, including the second coil 1230, can be mounted or arranged on the upper surface of the printed circuit board 1250, which is arranged above the base 1210. However, the implementation is not limited thereto. The second coil 1230 can be arranged in close contact with the base 1210, spaced apart from the base 1210, or formed on a separate substrate that is stacked on and connected to the printed circuit board 1250.

[0232] The printed circuit board 1250 can be electrically connected to at least one of the upper elastic member 1150 and the lower elastic member 1160 and coupled to the upper surface of the base 1210, and, as Figure 12 As shown, the printed circuit board 1250 may have through holes at positions corresponding to the ends of the support member 1220. Alternatively, the printed circuit board 1250 may be electrically connected to and / or coupled to the support member without having through holes.

[0233] Terminals 1251 may be arranged or formed on the printed circuit board 1250. The terminals 1251 may be arranged on a curved terminal surface 1253. Multiple terminals 1251 may be arranged on the terminal surface 1253 to receive external power to supply current to the first coil 1120 and / or the second coil 1230. The number of terminals formed on the terminal surface 1253 may be increased or decreased depending on the type of component that needs to be controlled. Additionally, the printed circuit board 1250 may have one or more terminal surfaces 1253.

[0234] The cover member 1300 can be generally formed in the shape of a box and can accommodate the movable unit, the second coil 1230, a portion of the printed circuit board 1250, etc., and the cover member 1300 can be coupled to the base 1210. The cover member 1300 can protect the movable unit, the second coil 1230, the printed circuit board 1250, etc. housed therein from damage, and the cover member 1300 further limits the leakage of the electromagnetic field generated by the first magnet 1130, the first coil 1120, the second coil 1230, etc., so as to concentrate the electromagnetic field.

[0235] Figure 13 An exploded perspective view showing a portion of a lens driving device according to another embodiment is shown. Figure 14 yes Figure 13 A perspective view from below. Figure 15 This is a bottom perspective view showing a portion of a lens driving device according to another embodiment. Figure 16 for Figure 15 Side view. Figure 17 for Figure 16 A magnified view of part B in the image.

[0236] In an embodiment, the circuit component 1231 provided with the second coil 1230 can be coupled or fixed to the printed circuit board 1250 by adhesive or solder, and the circuit component 1231 can be electrically connected to the printed circuit board 1250 to receive current from the printed circuit board 1250.

[0237] Current can be supplied from the printed circuit board 1250 to the second coil 1230, and the second coil 1230 moves the housing 1140 in a second direction and / or a third direction through electromagnetic interaction with the first magnet 1130 to perform hand tremor correction of the lens drive device.

[0238] The printed circuit board 1250 can be bonded or fixed to a base 1210, which is bonded and disposed on the underside, for example by an adhesive. Here, the adhesive can be applied to the underside of the printed circuit board 1250 and the inner surface of the terminal surface 1253.

[0239] like Figure 13 and Figure 14 As shown, terminal surface 1253 can be formed on one side of printed circuit board 1250 for bending, and in this embodiment, the number of terminal surfaces 1253 can be one to four. In one embodiment, when printed circuit board 1250 is formed of flexible material, when terminal surface 1253 is integrally formed on printed circuit board 1250 and bonded to base 1210, terminal surface 1253 can be bent and bonded to the corresponding portion of base 1210.

[0240] The adhesive can be applied to a portion of the base 1210 corresponding to the lower surface of the printed circuit board 1250 and the inner surface of the terminal surface 1253. Of course, when bonding the printed circuit board and the base 1210, the adhesive can be applied to only one of the base 1210 and the printed circuit board 1250 or the adhesive can be applied to both the base 1210 and the printed circuit board 1250.

[0241] The base 1210 may be provided with a bent portion 1212 corresponding to the inner surface of the terminal surface 1253 of the printed circuit board 1250 to be coupled to the inner surface. That is, the bent portion 1212 may be formed at a part of the base 1210 corresponding to the terminal surface 1253 and coupled to the terminal surface 1253.

[0242] Specifically, such as Figure 17 As shown, the inner surface of the terminal surface 1253 and the outer surface of the bent portion 1212 can be arranged to face each other, so that an adhesive portion P can be formed between the inner surface of the terminal surface 1253 and the outer surface of the bent portion 1212, and the terminal surface 1253 and the bent portion 1212 can be bonded to each other by an adhesive disposed between the adhesive portions P.

[0243] As described above, a plurality of terminal surfaces 1253 may be provided on the printed circuit board 1250, and therefore, a number of bent portions 1212 as many as the number of terminal surfaces 1253 may be provided at positions corresponding to the terminal surfaces.

[0244] like Figure 13 and Figure 14 As shown, for example, the printed circuit board 1250 may have a quadrilateral external shape when viewed from a first direction, and the terminal surface 1253 may be bent from one side of the printed circuit board 1250.

[0245] Therefore, when viewed from the first direction, the base 1210 is formed to have a quadrilateral external shape corresponding to the terminal surface 1253, and the bent portion 1212 can extend and bend from one side of the base 1210.

[0246] A cutout 1213 may be formed in the base 1210, and the corners of the base 1210 may be embedded in the cutout 1213. In an embodiment, since the cutout 1213 is formed at each corner of the base 1210, a total of four cutouts 1213 may be formed in the base 1210.

[0247] The cut portion 1213 may be spaced apart from the front end and rear end of the curved portion 1212 arranged in the longitudinal direction, and the portion of the cut portion 1213 and the curved portion 1212 that are spaced apart from each other may be provided with a first recess 1211.

[0248] The cutout 1213 can be formed to inspect the soldering of the support member 1220 to the circuit member 1231 and / or the printed circuit board 1250. In particular, when a through hole is formed in the circuit member 1231 and the lower ends of the printed circuit board 1250 and the support member 1220 are inserted into the through hole, when soldering is applied to the printed circuit board 1250 where the support member 1220 passes through its insertion portion, the soldering condition can be observed to determine whether there are any defects in the soldering.

[0249] As described in detail below, for example, a first recess 1211 may be formed to surround at least a portion of the cutout 1213.

[0250] On the other hand, if no through-hole is formed in the circuit component 1231 and / or the printed circuit board 1250 and the support component 1220 is electrically soldered to the corresponding portion of the circuit component 1231, the cutout portion 1213 may not be formed.

[0251] If the notch 1213 is not formed, the first recess 1211 may be formed on the lower surface of the base 1210, for example at a corner of the base 1210.

[0252] If the adhesive is not applied sufficiently to the bonding portion P of the base 1210 and the printed circuit board 1250, a gap may be created between the base 1210 and the printed circuit board 1250.

[0253] Specifically, if the adhesive is not adequately applied between the terminal surface 1253 and the bent portion 1212, a gap may form between them. Due to this gap, the terminal surface 1253 may be spaced apart from the bent portion 1212 and placed in an undesirable location. This can lead to poor assembly and product defects.

[0254] Therefore, it is appropriate that the adhesive is applied sufficiently to the bonding portion P of the base 1210 and the printed circuit board 1250. On the other hand, if the adhesive is applied excessively to the bonding portion P, the following problems may occur.

[0255] If excessive adhesive is applied to the bonded portion P, the excess adhesive may flow to the underside of the base 1210 and solidify thereon. The adhesive that has flowed to the underside of the base 1210 and solidified can form a protrusion.

[0256] Therefore, the filter (not shown) arranged below the base 1210 and capable of being coupled to the base 1210, the retainer (not shown) on which the filter is mounted, etc., may have gaps between the adhesive parts P due to the protrusions not being joined as designed, and the camera module including the lens drive device may have locally different heights.

[0257] This height difference can lead to defects in the lens drive mechanism and the camera module. Even when the adhesive is applied sufficiently to the adhesive portion P, defects may still occur due to the height difference. Therefore, a structure capable of preventing defects can be formed on the base 1210.

[0258] Therefore, in this embodiment, the lower surface of the base 1210 may be provided with a first recess 1211, and the upper surface of the base 1210 may be provided with a second recess 1214. The first recess 1211 and the second recess 1214 will be described in detail below.

[0259] The first recess 1211 may be formed on the portion of the lower surface of the base 1210 that is joined to the terminal surface 1253 of the printed circuit board 1250. The first recess 1211 may be used to contain excess adhesive to suppress the formation of protrusions that are created by the curing of adhesive introduced into the lower surface of the base 1210.

[0260] In particular, since the first recess 1211 is used to prevent the adhesive applied to the lower surface of the printed circuit board 1250 and / or the upper surface of the base 1210, as well as the adhesive applied to the terminal surface 1253 and / or the bent portion 1212, from flowing to the lower surface of the base 1210 and forming a protrusion on the lower surface of the base 1210, the first recess 1211 is preferably formed around the bent portion 1212.

[0261] Because the adhesive has surface tension in a liquid state, the flow path of the adhesive flowing out from the terminal surface 1253 and / or the bent portion 1212 can be changed at the lower end of the side surface of the base 1210 by the surface tension, so that the adhesive can flow to the lower side of the base 1210 and the first recess 1211 can receive the introduced adhesive.

[0262] like Figure 14 and Figure 15 As shown, since the first recess 1211 is recessed into the lower surface of the base 1210, even if the adhesive introduced into the first recess 1211 solidifies, no protrusion will be formed on the lower surface of the base 1210. Therefore, the lower surface of the base 1210 can maintain flatness.

[0263] Therefore, the first recess 1211 portion can prevent or reduce product defects in the lens drive device and camera module caused by protrusions formed by the adhesive. (Refer to below) Figure 19 and Figure 20 Describe the specific structure of the first recess 1211.

[0264] Figure 18 This is a plan view of the base 1210 according to the embodiment. (e.g.) Figure 18 As shown, the base 1210 may have a second recess 1214 on its upper surface.

[0265] The second recess 1214 is a portion into which excess adhesive used to bond the printed circuit board 1250 to the base 1210 is introduced. Thus, the second recess 1214 can accommodate excess adhesive applied to the lower surface of the printed circuit board 1250 and / or the upper surface of the base 1210.

[0266] Therefore, the second recess 1214 can reduce the local height difference in the first direction between the printed circuit board 1250 and the base 1210 caused by excess adhesive. Furthermore, this height difference can reduce defects in the lens drive device and the camera module.

[0267] In addition, excess adhesive can be prevented from flowing out of the base 1210 and the printed circuit board 1250 and solidifying to form a protrusion, and thus product defects caused by such protrusions can be reduced.

[0268] Additionally, excess adhesive can be reduced from flowing along the curved portion 1212 and / or the terminal surface 1253 to the lower surface of the base 1210. Excess adhesive can flow downwards along the outer side of the terminal surface 1253 and can be applied to the terminal 1251 formed on the terminal surface 1253 and solidified to reduce product defects.

[0269] like Figure 18 As shown, the base 1210 may be provided with a circular hollow portion S, and the second recess 1214 may be formed along, for example, the circumferential surface of the hollow portion S.

[0270] In addition, such as Figure 18 As shown, a plurality of second recesses 1214 may be provided, and the corresponding second recesses 1214 may be arranged at regular intervals along the circumferential surface of the hollow portion S. Although not shown, the second recesses 1214 may be formed in a circular shape surrounding the hollow portion S.

[0271] Furthermore, although not shown, the second recess 1214 can be formed at various locations and have various shapes on the upper surface of the base 1210. For example, the second recess 1214 can be formed along each side of the upper surface of the base 1210.

[0272] Furthermore, if the cutout 1213 is not formed on the base 1210, the recess can be formed at the corner of the base 1210. In addition, the second recess 1214 can be formed into various shapes, such as a closed loop, a polygon, or a circle, when viewed from the first direction.

[0273] Figure 19 This is a bottom view of the base according to one embodiment. For example... Figure 19 As shown, the first recess 1211 may be formed to surround at least a portion of the curved portion 1212. Since excess adhesive can flow from the point where the curved portion 1212 begins to the lower surface of the base 1210 through surface tension, it may be appropriate to form the first recess to surround a portion of the curved portion 1212.

[0274] Specifically, for example, the first recess 1211 may be formed to surround at least a portion of the front and rear ends of the curved portion 1212. Forming the first recess 1211 may be suitable because excess adhesive flows primarily from the points at the front and rear ends of the curved portion 1212 to the lower surface of the base 1210.

[0275] Alternatively, for example, a portion of the first recess 1211 may be formed in the longitudinal direction of the curved portion 1212, and other portions of the first recess 1211 may be formed along the cut portion 1213. Here, the first recess 1211 may be formed to surround at least a portion of the cut portion 1213.

[0276] The first recess 1211 having the above structure can provide sufficient space to accommodate excess adhesive introduced into the first recess 1211 from the front and rear ends of the curved portion 1212 starting from the curved portion 1212.

[0277] That is, a portion of the adhesive flowing to the lower surface of the base 1210 can be introduced into the first recess 1211 formed along the cut portion 1213, and the remaining adhesive can be introduced into the first recess 1211 formed in the longitudinal direction of the curved portion 1212.

[0278] The adhesive can flow and solidify along the first recess 1211 due to surface tension. Therefore, the protrusion may not be formed on the lower surface of the base 1210, and the flatness of a portion of the lower surface of the base 1210 bonded to other components such as retainers can be maintained.

[0279] Figure 20 This is a bottom view of the base according to another embodiment. (e.g.) Figure 20 As shown, a plurality of first recesses 1211 can be formed in a discontinuous manner in the longitudinal direction of the curved portion 1212 to surround the front end and the rear end of the curved portion 1212.

[0280] That is, the first recess 1211 may not be formed at the center of the curved portion 1212, but may be formed to surround the front and rear ends of the curved portion 1212. This structure can prevent the curved portion 1212 from bending.

[0281] In other words, if the thickness of a portion of the base 1210 at the location where the curved portion 1212 is formed is reduced due to the formation of the first recess 1211, the curved portion 1212 can be laterally bent or deflected.

[0282] Therefore, if the first recess 1211 is formed only at the front and rear ends of the curved portion 1212, the central portion can firmly fix the curved portion 1212, and thus can prevent or reduce the lateral bending of the curved portion 1212.

[0283] The first recess 1211 can be configured in various shapes and numbers and formed at various locations on the lower surface of the base 1210. However, as Figure 19 and Figure 20 As shown, the first recess 1211 is preferably configured to surround the front and rear ends of the curved portion 1212.

[0284] As described above, the reason is that the adhesive introduced from the terminal surface 1253 and the bent portion 1212 into the lower surface of the base 1210 can flow mainly from the points at the front and rear ends of the bent portion 1212 protruding from the bent portion 1212 to the lower surface of the base 1210.

[0285] For ease of formation, the first recess 1211 may be closed at one side and the opposite side may be open when viewed from a second or third direction, and the open opposite side may be formed to end on the side surface of the base 1210.

[0286] Although not shown, the first recess 1211 may be provided with a stepped portion to more reliably prevent adhesive from flowing to the lower surface of the base 1210.

[0287] With this stepped portion, even when the adhesive flows on the first stage of the first recess 1211, the second stage can prevent the adhesive from flowing on the adhesive portion of the lower surface of the base 1210. Of course, the stepped portion can be provided with three or more stages.

[0288] In this embodiment, since excess adhesive can be contained in the first recess 1211 provided on the lower side of the base 1210, it can prevent the adhesive from forming a protrusion on the lower surface of the base 1210.

[0289] In addition, since excess adhesive can be contained in the second recess 1214 provided on the upper side of the base 1210, it is possible to prevent adhesive from forming protrusions on the upper surface of the base 1210.

[0290] Furthermore, since the flatness of the adhesive portion relative to other components on the lower surface of the base 1210 can be maintained by suppressing the formation of protrusions, the height difference during the assembly of the lens drive device and the camera module can be eliminated or reduced.

[0291] Furthermore, by reducing or eliminating the height difference, defects can be eliminated or reduced during the assembly of the lens drive unit and camera module.

[0292] Although only a few embodiments have been described above in conjunction with implementation methods, various other forms of implementation methods are possible. The technical content of the embodiments described above can be combined in various forms other than mutually incompatible technologies to implement new implementation methods.

[0293] [Industrial Applicability]

[0294] In this embodiment, the upper elastic member can be divided into multiple parts, and some of these parts can be arranged in parallel to increase the elastic modulus, spring constant, or stiffness of the upper elastic member, thereby suppressing unnecessary tilting and offset of the coil frame or housing during operation of the lens drive device. Therefore, it has industrial applicability.

[0295] This technology can also be configured as follows.

[0296] (1) A lens driving device, comprising:

[0297] A coil frame, wherein a first coil is arranged on the outer peripheral surface of the coil frame;

[0298] A position detection sensor is installed on the coil frame;

[0299] A housing, on the inner side of which the coil frame is arranged;

[0300] An upper elastic member, the upper elastic member being disposed on the upper side of the housing; and

[0301] A support member configured to support the housing so that the housing can move along a second direction or a third direction perpendicular to the first direction.

[0302] The upper elastic member is divided into multiple parts, and at least two of the parts are arranged parallel to each other in the xy plane in the second direction or the third direction.

[0303] The at least two portions are arranged such that one end of each of the at least two portions faces each other.

[0304] (2) The lens driving device according to (1), wherein the upper elastic member comprises:

[0305] A first upper elastic member has a side connected to the first coil and an opposite side connected to the support member, a portion of the first upper elastic member being arranged in the second direction or the third direction; and

[0306] A second upper elastic member is arranged facing the first upper elastic member, wherein the central portion of the coil frame is located between the first upper elastic member and the second upper elastic member, and the second upper elastic member has a side connected to the first coil and an opposite side connected to the support member.

[0307] (3) The lens driving device according to (2), wherein the upper elastic member comprises:

[0308] A third upper elastic member has one side coupled to the coil frame and electrically connected to the position detection sensor, and an opposite side coupled to the housing and electrically connected to the support member.

[0309] The third upper elastic member is arranged in the xy plane parallel to the first upper elastic member, and the third upper elastic member has a side end arranged to face the side end of the first upper elastic member.

[0310] (4) The lens driving device according to (3), wherein the upper elastic member comprises:

[0311] A fourth upper elastic member is arranged in the xy plane parallel to the second upper elastic member and has a side end arranged to face the second upper elastic member.

[0312] The fourth upper elastic member has one side coupled to the coil frame and electrically connected to the position detection sensor, and the opposite side coupled to the housing and electrically connected to the support member.

[0313] (5) The lens driving device according to (2), wherein the upper elastic member comprises:

[0314] The fifth upper elastic member has a side that is coupled to the coil frame and electrically connected to the position detection sensor, and an opposite side that is coupled to the housing and electrically connected to the support member.

[0315] (6) The lens driving device according to (5), wherein the upper elastic member comprises:

[0316] A sixth upper elastic member is arranged facing the fifth upper elastic member, wherein the central portion of the coil frame is located between the fifth upper elastic member and the sixth upper elastic member, and the sixth upper elastic member has a side coupled to the coil frame and electrically connected to the position detection sensor and an opposite side coupled to the housing and electrically connected to the support member.

[0317] (7) The lens driving device according to (6), wherein the fifth upper elastic member comprises:

[0318] The first coil frame coupling portion is coupled to the coil frame and electrically connected to the position detection sensor;

[0319] The second support member coupling portion is coupled to the housing and electrically connected to the support member; and

[0320] A second connector is configured to connect the first coil frame coupling portion and the second support member coupling portion to each other.

[0321] (8) The lens driving device according to (2), wherein the first upper elastic member or the second upper elastic member comprises:

[0322] The first coil coupling portion is electrically connected to the end of the first coil;

[0323] A first support member coupling portion, the first support member coupling portion being electrically connected to the end of the support member; and

[0324] A first connector is configured to connect the first coil coupling portion to the first support member coupling portion.

[0325] (9) The lens driving device according to (8), wherein the coil frame is provided with a coupling protrusion at the upper part of the coil frame.

[0326] The end of the first coil is wound around the coupling protrusion, and the end of the first coil and the first coil coupling portion are welded to each other.

[0327] (10) A lens driving device, comprising:

[0328] A coil frame, wherein a first coil is arranged on the outer peripheral surface of the coil frame;

[0329] A housing, on the inner side of which the coil frame is arranged;

[0330] A first magnet, which is fixed to the housing;

[0331] A second coil is arranged on the underside of the first magnet so as to face the first magnet;

[0332] A printed circuit board, the printed circuit board being disposed on the underside of the second coil and having a terminal surface allowing terminals to be mounted thereon; and

[0333] A base, which is disposed below the coil frame and on which the printed circuit board is received and attached,

[0334] The lower surface of the base has a portion with a first recess, and the terminal surface of the printed circuit board is bonded to the recess.

[0335] (11) The lens driving device according to (10), wherein the terminal surface is formed on the side surface of the printed circuit board so as to be bent.

[0336] The base has a portion with a curved portion, which is bent to allow the terminal surface to engage with the curved portion, the portion corresponding to the terminal surface.

[0337] (12) The lens driving device according to (11), wherein the terminal surface includes a plurality of terminal surfaces disposed on the printed circuit board, and the curved portion includes as many curved portions as the number of terminal surfaces, the curved portions being arranged at positions corresponding to the terminal surfaces.

[0338] (13) The lens driving device according to (11), wherein the first recess is formed to surround at least a portion of the curved portion.

[0339] (14) The lens driving device according to (11), wherein the base is formed to have a quadrilateral external shape when viewed from a first direction, and the curved portion is curved by extending from one side of the base.

[0340] (15) The lens driving device according to (14), wherein the base comprises:

[0341] The cut-out portion is formed by recessing the corner of the base.

[0342] (16) The lens driving device according to (15), wherein the cutout portion is spaced apart from the front end and rear end of the curved portion arranged in the longitudinal direction of the curved portion.

[0343] The first recess is formed to surround at least a portion of the front end and the rear end of the curved portion.

[0344] (17) The lens driving device according to (10), wherein the upper surface of the base is provided with a second recess, thereby allowing excess adhesive for bonding the printed circuit board to the base to be introduced into the second recess.

[0345] (18) The lens driving device according to (17), wherein the base is provided with a circular hollow portion, and the second recess is formed along the circumferential surface of the hollow portion.

[0346] (19) The lens driving device according to (18), wherein the second recess includes a plurality of second recesses arranged at constant intervals along the circumferential surface of the hollow portion.

[0347] (20) A camera device module, comprising:

[0348] According to the lens driving device described in (1); and

[0349] An image sensor mounted on the lens driving device.

Claims

1. A lens driving device, comprising: Base; A housing, arranged on the base; The coil frame is arranged inside the housing; Magnets are arranged on the housing; An upper elastic member is coupled to the upper part of the coil frame and the upper part of the housing; The first coil is arranged on the outer peripheral surface of the coil frame; A printed circuit board is disposed on the base; A second coil is arranged opposite the magnet in a first direction parallel to the optical axis. as well as A support member, coupled to the upper elastic member and configured to support the housing. The base includes: A cutout portion, formed at the corner of the base, is opposite to the support member in the first direction; and A first recess is recessed from the lower surface of the base and is arranged to surround at least a portion of the cutout.

2. The lens driving device according to claim 1, wherein, The first recess is configured to accommodate excess adhesive.

3. The lens driving device according to claim 1, comprising an adhesive disposed between the base and the printed circuit board.

4. The lens driving device according to claim 1, wherein, The printed circuit board includes: a terminal surface bent from the side surface of the printed circuit board and a plurality of terminals disposed in the terminal surface.

5. The lens driving device according to claim 4, wherein, The base includes a curved portion coupled to the terminal surface of the printed circuit board.

6. The lens driving device according to claim 5, wherein, The curved portion extends from one side of the base.

7. The lens driving device according to claim 5, wherein, The first recess surrounds at least a portion of the curved portion of the base.

8. The lens driving device according to claim 5, wherein, The curved portion of the base is spaced apart from the cut portion.

9. The lens driving device according to claim 3, wherein, The base includes a second recess formed on the upper surface of the base. Excess adhesive is introduced into the second recess of the base.

10. The lens driving device according to claim 9, wherein, The base includes a hollow portion, and the second recess is formed along the circumferential surface of the hollow portion of the base.

11. The lens driving device according to claim 9, wherein, The base includes a hollow portion, and the second recess includes a plurality of second recesses spaced apart from each other, wherein the plurality of second recesses are arranged along the circumferential surface of the hollow portion of the base.

12. The lens driving device according to claim 1, wherein, The coil frame is configured to move along the first direction by the interaction between the first coil and the magnet.

13. The lens driving device according to claim 1, wherein, The housing is configured to move in a direction perpendicular to the first direction through the interaction between the second coil and the magnet.

14. The lens driving device according to claim 1, comprising a lower elastic member disposed below the housing and coupled to the coil frame and the housing.

15. The lens driving device according to claim 1, wherein, The second coil is electrically connected to the printed circuit board.

16. The lens driving device according to claim 1, wherein, The first coil is electrically connected to the printed circuit board.

17. The lens driving device according to claim 1, wherein, The base includes four corners, and the cutout is arranged at each of the four corners of the base.

18. A lens driving device, comprising: The base, including the hollow section; A housing, arranged on the base; The coil frame is arranged inside the housing; Magnets are arranged on the housing; An upper elastic member is coupled to the upper part of the coil frame and the upper part of the housing; The first coil is arranged on the outer peripheral surface of the coil frame; A printed circuit board is disposed on the base; A second coil is arranged opposite the magnet in a first direction parallel to the optical axis. as well as A support member, coupled to the upper elastic member and configured to support the housing. The base includes: a cutout formed at a corner of the base and a first recess recessed from the lower surface of the base. The base includes a curved portion coupled to the terminal surface of the printed circuit board, and Wherein, a portion of the first recess is formed along the longitudinal direction of the curved portion, and another portion of the first recess is formed along the cut portion.

19. The lens driving device according to claim 18, wherein, The base includes four corners, and the cut portion includes four cut portions corresponding to the four corners of the base.

20. A camera device module, comprising: Lens tube; The lens driving device according to any one of claims 1 to 19, wherein the lens driving device is coupled to the lens barrel; as well as Image sensor.

21. A mobile device comprising a camera module according to claim 20.

Images