Lens driving device and camera module including the same

Abstract

To provide a lens driving device that can receive feedback of position information of a bobbin.SOLUTION: A lens driving device includes: a base 190; a cover member coupled to the base and including a top face and a plurality of side walls; a bobbin 110A arranged on the base and moving in an optical axis direction; a pair of driving magnets 130 arranged on the cover member; a coil 120 arranged on the bobbin and facing the pair of driving magnets; a sensing magnet 182A arranged on the bobbin; and a position sensor sensing the sensing magnet. The side walls include first and second side walls arranged on the opposite sides to each other, and third and fourth side walls arranged between the first and second side walls and arranged on the opposite sides to each other. The pair of driving magnets include a first magnet arranged on the first side wall and a second magnet arranged on the second side wall. No driving magnets are arranged on the third side wall and the fourth side wall. The sensing magnet is arranged on a first surface of the bobbin corresponding to the third side wall.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The embodiment relates to a lens driving device and a camera module including the same. [Background technology]

[0002] In recent years, mobile phones, smartphones, and tablet PCs with built-in ultra-small digital cameras have become increasingly popular. The development of IT products such as notebook PCs is progressing vigorously. The camera module has an autofocusing function, a shutter, It is required to provide various functions such as vibration reduction and zoom function. The trend is towards pixelation and miniaturization.

[0003] On the other hand, existing camera modules have autofocusing and hand tremor correction functions. The lens driving device may include a lens driving device that can perform various functions. It is possible to use a voice coil unit motor, which is generally used. The lens unit motor is a magnet fixed to the housing and connected to the lens barrel. It operates by the electromagnetic interaction of the coil unit wound on the outer surface of the bobbin. This voice coil motor type actuator can perform the focusing function. The actuator module has a bobbin that moves up and down and is elastically supported by lower and upper elastic members. The lens can move back and forth in a direction parallel to the optical axis while remaining attached.

[0004] In the case of IT products with built-in ultra-compact digital cameras, the image sensor and lens It has a built-in lens driver that adjusts the distance between the lenses to align the focal length of the lens. Existing ultra-compact digital cameras like these have long autofocus times to perform the autofocus function. Such problems have existed. Therefore, various efforts have been made to shorten the autofocus time. However, due to instability of electromagnetic force and decentering of the lens barrel caused by magnetic force, This may reduce the performance of the lens drive.

[0005] In addition, in the case of existing camera modules, the optical axis of the lens is used to know the focal position of the lens. Hall sensors (not shown) facing perpendicular to the direction In this case, a Hall sensor and a magnet (not shown) for the sensor can be arranged. The sensor detects the magnetic field of the sensor magnet and outputs a corresponding voltage. The position of the lens along the optical axis can be determined by the voltage output from the sensor. Even though the lens moved in the direction of the optical axis, the Hall sensor detected this accurately. This limits the ability to determine the position of the lens. Summary of the Invention [Problem to be solved by the invention]

[0006] One embodiment is a lens driver that can receive feedback of bobbin position information. and a camera module including the same.

[0007] Another embodiment is a lens driving device that can shorten the autofocus time of the lens and The present invention provides a camera module including a lens, and a method for accurately and quickly positioning the lens according to the focal length of the lens. The present invention provides a lens driving device that can be placed on a camera body and a camera module that includes the same. Patent application title: LENS DRIVE DEVICE IMPROVING AUTOFOCUS FUNCTION AND IMPROVING SPACE EFFICIENCY AND DURABILITY and a camera module including the same.

[0008] Still another embodiment is a lens drive that can accurately grasp and control the position of the lens. An apparatus and a camera module including the same are provided. [Means for solving the problem]

[0009] The lens driving device according to one embodiment has at least one lens mounted thereon. A bobbin on which a coil unit is arranged; a driving motor at a position corresponding to the coil unit; a housing member to which the magnet is attached; one end of each of which is connected to the upper and lower surfaces of the bobbin; and an upper and lower elastic support members which elastically support the movement of the bobbin in a direction parallel to the optical axis direction of the lens. a lower elastic member; and a sensing unit that senses movement of the bobbin in a direction parallel to the optical axis. the sensing unit is a sensing magnet attached to the outer circumferential surface of the bobbin. and a sensor mounted on a side wall of the housing member and facing the sensing magnet. The inner surface of the housing may include a circuit board having a position detection sensor disposed thereon.

[0010] For example, the lens driving device further includes a cover member that surrounds the housing member. The cover member has a window provided on a surface facing the sensing magnet. The cover member may be made of a metal material.

[0011] For example, the bobbin has a sensing magnet attached thereto and a magnet protruding from its outer circumferential surface. The magnet mounting part may include a magnet mounting part that is interfering with the coil unit. The magnet mounting portion can be disposed at a position where it does not interfere with the coil unit. It can be placed higher.

[0012] For example, the drive magnets are arranged on two opposing surfaces of the housing member. The sensing magnet and the driving magnet may be arranged in parallel. They can be arranged on different surfaces so as not to face each other.

[0013] For example, the position sensor is a Hall sensor, and the circuit board is exposed to the outside. The circuit may include a plurality of terminals mounted so as to be connected to each other.

[0014] Also, a camera module according to an embodiment includes an image sensor; and a lens driving device according to the embodiment. .

[0015] Furthermore, the lens driving device according to another embodiment is a hollow columnar housing that supports a driving magnet. Housing member: A coil facing the driving magnet is attached to the outer periphery of the housing member. The electromagnetic interaction between the drive magnet and the coil causes the housing member to a bobbin moving in a first direction parallel to the optical axis therein; and a first change in the first direction of the bobbin. It may include a sensing unit for sensing a position.

[0016] For example, the lens driving device may include a circuit board attached to one side of the housing member. It may further comprise a plate.

[0017] For example, the sensing unit may be attached, inserted, fixed, contacted, coupled, fixed, or temporarily attached to the bobbin. a sensing magnet fixed, supported or positioned in the housing member; and To attach, insert, fix, contact, connect, fix, support or position the sensing magnet in The housing member may include a displacement sensor disposed on both opposing sides thereof. The first and second driving magnets are respectively attached, inserted, fixed, contacted, joined, fixed, supported or is arranged on one side surface of the housing member perpendicular to the both side surfaces or on a side other than the both side surfaces. The displacement sensing unit is attached, inserted, fixed, contacted, coupled, fixed, supported or disposed on the surface of the This can be done.

[0018] For example, first and second driving motors are provided on both opposing sides of the housing member. a magnet is attached, inserted, fixed, contacted, joined, fixed, supported or positioned in the housing portion; A third driving magnet is provided on one side of the material perpendicular to the both side surfaces or on a surface other than the both side surfaces. The displacement sensor is disposed at a predetermined distance from the third driving magnet. to be attached, inserted, fixed, contacted, joined, fixed, supported or arranged in the housing member; A fourth driving magnet is attached, inserted, fixed, contacted, and coupled to the other side opposite the one side. The third driving magnet and the fourth driving magnet can be fixed, supported or arranged. The magnets may be arranged symmetrically with respect to the center of the housing member. can.

[0019] For example, the bobbin may have an outer periphery that accommodates the sensing magnet. The receiving groove may be formed inwardly to a predetermined depth on the surface. The coil may be wound around the bobbin. The inner surface on which one surface of the sensing magnet is supported and the outer surface on which the coil is attached are The depth between the peripheral surfaces may be equal to or less than the thickness of the sensing magnet.

[0020] For example, the accommodation groove is formed on one of the lower surface and the upper surface of the bobbin. The nozzle may include an opening communicating with the nozzle.

[0021] For example, the receiving groove has an inner surface on which one surface of the sensing magnet is supported; The inner surface is recessed to a predetermined depth so that the adhesive can be injected. The receiving groove may further include a first additional groove extending from the adhesive groove. The total length of the adhesive groove and the first additional groove is equal to the thickness of the bobbin. The length of the sensing magnet may be longer in the direction of the axis of rotation.

[0022] For example, the accommodation groove is formed on one of the lower surface and the upper surface of the bobbin. an opening extending from the adhesive groove and extending inward from the opening toward the bobbin; The second additional groove may further be formed at a certain depth.

[0023] For example, the bobbin has an outer circumferential surface facing the outer circumferential surface in which the accommodation groove is formed. A predetermined depth is provided on the outer circumferential surface of the bobbin at a position symmetrical to the receiving groove with respect to the center of the bobbin. an additional receiving groove formed inward; and a sensing device received in the additional receiving groove. The magnet may further include a weight balancing member having the same weight as the magnet.

[0024] For example, the lens driving device further includes an upper elastic member and a lower elastic member, The inner frames of the upper and lower elastic members are connected to the bobbin. Each outer frame of the lower elastic member can be coupled to the housing member. .

[0025] Also, a camera module according to another embodiment includes an image sensor; and a lens driving device according to the other embodiment. Cut.

[0026] Furthermore, a lens driving device according to still another embodiment is provided, which has at least one lens mounted thereon. a moving part that faces each other and interacts with each other so as to move the moving part in the optical axis direction of the lens; a first coil and a drive magnet for detecting the position of the moving part in the optical axis direction; a position sensor or a driver including said position sensor; and said position sensor or a front a bipolar magnetized magnet disposed opposite the driver, a first side facing the position sensor and having a first polarity; and and is spaced apart from or in contact with the first side surface in a direction parallel to the optical axis direction. a second side having a second polarity opposite to the first side, The length in the optical axis direction may be equal to or greater than the length of the second side surface in the optical axis direction.

[0027] For example, the first polarity may be a south pole and the second polarity may be a north pole. The first polarity may be a north pole and the second polarity may be a south pole.

[0028] For example, the bipolar magnetized magnet may be a first and a second sensor arranged at a distance from each other. a sensing magnet; and a non-magnetic separator disposed between the first and second sensing magnets. The first and second sensing magnets may be parallel to the optical axis direction. The first and second sensing magnets may be spaced apart from each other in a direction. The first side surface may be spaced apart from each other in the magnetization direction. Alternatively, the second side may be located above the first side. It is possible.

[0029] For example, in the initial state before the lens is moved in the optical axis direction, The inter-plane height is located on a virtual horizontal plane extending from the upper end of the first side surface in the magnetization direction. can be done.

[0030] For example, at an initial stage before the lens is moved in the optical axis direction, the intermediate height of the position sensor The length may coincide with a first point on the first side in the magnetizing direction.

[0031] For example, at an initial stage before the lens is moved in the optical axis direction, the intermediate height of the position sensor The height can be aligned with the non-magnetic partition wall in the magnetization direction.

[0032] For example, at an initial stage before the lens is moved in the optical axis direction, the intermediate height of the position sensor The height may correspond to a second point higher than the first point in the magnetization direction. The difference between the point and the first point can be:

[0033] TIFF2025172900000002.tif11153Here, H2 is the height of the second point, H1 is the height of the first point, and ΔD is the height of the moving part. The value D obtained by subtracting the lower displacement width from the upper displacement width means the displacement width of the moving part.

[0034] For example, at an initial stage before the lens is moved in the optical axis direction, the intermediate height of the position sensor The height of the lens can be aligned with the second side surface. In the lowered position, the mid-height of the position sensor coincides with the lower point of the lower end of the second side surface. It is possible.

[0035] For example, the first point may correspond to the mid-height of the first side.

[0036] For example, the first and second side surfaces are the first and second sensors facing the position sensor. These can correspond to the sides of the sensing magnet.

[0037] For example, the first and second sides may be the first or second side facing the position sensor. This can correspond to the side of the sensing magnet.

[0038] For example, the non-magnetic partition wall may include a gap or a non-magnetic material.

[0039] For example, the moving part may move in one direction of the optical axis, or in both directions of the optical axis. It can be moved.

[0040] For example, the lens driving device according to still another embodiment includes a lens supporting the driving magnet. The first and second sensing magnets are coupled to and in contact with the moving part. , supported, fixed, temporarily fixed, inserted or fixed, and the position sensor is coupled to or in contact with the fixed part. , supported, provisionally fixed, inserted or anchored.

[0041] For example, the lens driving device according to still another embodiment includes a lens supporting the driving magnet. The sensor further includes a fixed portion, and the first and second sensing magnets are coupled to and in contact with the fixed portion. , supported, fixed, temporarily fixed, inserted or fixed, and the position sensor is coupled to or in contact with the moving part. , supported, fixed, provisionally fixed, inserted or anchored.

[0042] For example, the strength of the magnetic field can be coded using 7 to 12 bits. The length of the non-magnetic partition wall is 1 / 2 the length of the bipolar magnetized magnet in the direction parallel to the optical axis direction. The ratio of the polarity of the magnet to the optical axis of the bipolar magnetized magnet can be 0% or more or 50% or less. The length in the parallel direction may be 1.5 times or more the movable width of the moving part. The intermediate height of the position sensor may be biased toward either the first or second side.

[0043] Furthermore, a camera module according to yet another embodiment includes an image sensor; a circuit board on which the sensor is mounted; and a lens driving device according to the still further embodiment. can be done. [Effects of the Invention]

[0044] The lens driving device and the camera module including the same according to the embodiment have a sensor on the outer surface of the bobbin. Install a sensing magnet and adjust the position of the sensing magnet to a position similar to a hall sensor. The displacement sensor detects the bobbin position during autofocusing. It can be accurately grasped, and an even number of magnets are arranged facing each other to grasp the bobbin This controls the movement of the coil in the optical axis direction, thereby achieving a good balance of the electromagnetic force acting on the first coil. A window is formed in the cover material corresponding to the sensing magnet. By doing so, the attractive force between the sensing magnet and the cover member causes the bobbin to move ahead. It is possible to prevent the deterioration of the

[0045] In particular, the lens driving device and the camera module including the same according to the embodiment are The amount of directional displacement is fed back to readjust the position of the lens along the optical axis. The lens focus alignment time can be shortened, and the distance between the sensing magnet and the displacement sensor can be This allows for more accurate detection of the amount of displacement in the direction of the optical axis of the lens. This allows the lens to be positioned more accurately and quickly at the focal length of the lens, The sensing magnet is attached to the outer surface of the bobbin, making the assembly process simple. A sensing magnet is attached to the moving bobbin, and then it is fixed, contacted, fixed, temporarily fixed, and joined. The displacement sensing unit is attached, fixed, contacted, or secured to the housing member, which is a fixed body. Temporarily fix, connect, support or position the sensing magnet and displacement sensor. No additional space is required for fixing, contacting, fastening, provisionally fastening, joining, supporting or locating. This allows for improved space efficiency in the camera module (especially the bobbin), and The position sensor and bipolar magnetized magnet are used to sense magnetic fields with varying strengths. By arranging the dots, it is possible to accurately sense the movement of the lens in the direction of the optical axis. [Brief explanation of the drawings]

[0046] [Figure 1] 1 shows a schematic perspective view of a camera module according to a first embodiment. [Figure 2] FIG. 2 shows an exploded perspective view of the camera module shown in FIG. [Figure 3] FIG. 3 is a perspective view of the bobbin shown in FIG. 2. [Figure 4] FIG. 2 shows a front view of the camera module shown in FIG. [Figure 5]5 shows a plan view of the camera module shown in FIG. 4 cut along line II'. [Figure 6] 2 is a front view of the lens driving device with the circuit board removed from the camera module shown in FIG. 1. [Figure 7] FIG. 10 is a schematic perspective view of a lens driving device according to a second embodiment. [Figure 8] 8 shows a schematic exploded perspective view of the lens driving device illustrated in FIG. 7 according to the embodiment. [Figure 9] 8 is a schematic perspective view of an embodiment of the lens driving device with the cover can removed from FIG. 7. FIG. [Figure 10] FIG. 10 is a schematic perspective plan view of a housing member according to another embodiment. [Figure 11] FIG. 10 is a schematic bottom perspective view of a housing member according to another embodiment. [Figure 12] FIG. 10 is a schematic exploded perspective view of a drive magnet, a housing member, a first circuit board, and a displacement sensing unit according to another embodiment. [Figure 13] FIG. 1 shows a top perspective view of an upper elastic member according to one embodiment. [Figure 14] FIG. 2 shows a top perspective view of a lower elastic member according to one embodiment. [Figure 15] 10 shows a top perspective view of a bobbin according to another embodiment. [Figure 16] 10 shows a bottom perspective view of a bobbin according to another embodiment. [Figure 17] FIG. 10 is an exploded perspective view of a bobbin, a first coil, a displacement sensing unit, and a sensing magnet according to another embodiment. [Figure 18] 10 is a schematic bottom view of a bobbin, a first coil, first and second driving magnets, a displacement sensing unit, and a sensing magnet according to another embodiment. FIG. [Figure 19] FIG. 10 is a schematic perspective view of a lens driving device according to a third embodiment. [Figure 20] FIG. 20 is a schematic exploded perspective view of the lens driving device shown in FIG. 19. [Figure 21] FIG. 20 is a schematic perspective view of the lens driving device with a cover member removed from FIG. 19. [Figure 22] FIG. 22 is a schematic plan view of FIG. 21. [Figure 23] FIG. 10 is a schematic perspective view of a drive magnet, a housing member, and a displacement sensing unit according to yet another embodiment. [Figure 24] FIG. 24 is a schematic perspective view of the drive magnet, the housing member, and the first circuit board, as viewed from an angle different from that of FIG. 23. [Figure 25] FIG. 10 is a schematic bottom perspective view of a drive magnet, a housing member, and a first circuit board according to yet another embodiment. [Figure 26] 10 is a schematic exploded perspective view of a drive magnet, a housing member, a first circuit board, and a displacement sensing unit according to yet another embodiment. FIG. [Figure 27] FIG. 10 is a schematic plan view of an upper elastic member according to another embodiment. [Figure 28] FIG. 10 is a schematic plan view of a lower elastic member according to another embodiment. [Figure 29] FIG. 10 is a schematic perspective view of a bobbin according to yet another embodiment. [Figure 30] 10 is a schematic bottom perspective view of a bobbin and a sensing magnet according to yet another embodiment. FIG. [Figure 31] FIG. 10 is a schematic exploded perspective view of a bobbin, a first coil, and a sensing magnet according to yet another embodiment. [Figure 32] FIG. 10 is a partially enlarged perspective view of the bobbin and the sensing magnet after being coupled together according to the embodiment; [Figure 33] FIG. 10 is a partially enlarged bottom view of the bobbin and the sensing magnet after being coupled together according to the embodiment. [Figure 34] FIG. 10 is a partially enlarged perspective view illustrating a housing groove of the bobbin according to the embodiment. [Figure 35] 10 is a schematic vertical cross-sectional view of a bobbin, a first coil, and a sensing magnet according to yet another embodiment. FIG. [Figure 36] FIG. 4 shows a schematic cross-sectional view of a lens driving device according to a 4-1 embodiment. [Figure 37a] A cross-sectional view of an embodiment of the bipolar magnetized magnet shown in Figure 36 is shown. [Figure 37b] A cross-sectional view of an embodiment of the bipolar magnetized magnet shown in Figure 36 is shown. [Figure 38] 37 is a graph for explaining the operation of the lens driving device shown in FIG. 36. [Figure 39] This shows a state in which the lens driving device shown in FIG. 36 has moved in the optical axis direction. [Figure 40] 10 is a graph showing the displacement of a moving part depending on the current supplied to the first coil in the lens driving device according to the fourth embodiment. [Figure 41] FIG. 4 shows a cross-sectional view of a lens driving device according to a 4-2 embodiment. [Figure 42] FIG. 4 shows a cross-sectional view of a lens driving device according to a 4-3 embodiment. [Figure 43a] A cross-sectional view of an embodiment of the bipolar magnetized magnet shown in Figure 42 is shown. [Figure 43b] A cross-sectional view of an embodiment of the bipolar magnetized magnet shown in Figure 42 is shown. [Figure 44] FIG. 4 shows a cross-sectional view of a lens driving device according to a fourth embodiment. [Figure 45] FIG. 4 shows a cross-sectional view of a lens driving device according to a 4-5th embodiment. [Figure 46] 10A and 10B are cross-sectional views of a lens driving device according to a fourth to sixth embodiment. [Figure 47] 47 is a graph showing the displacement of a moving part due to a current supplied to a first coil in the lens driving device shown in FIGS. 45 and 46. [Figure 48] 10 is a graph showing the strength of a magnetic field sensed by a position sensor according to the movement distance of a moving part in the optical axis direction, for each type of position sensor and bipolar magnetized magnet facing each other; [Figure 49a] 10 is a graph showing displacement according to the strength of a magnetic field detected by a position sensor; [Figure 49b] 10 is a graph showing displacement according to the strength of a magnetic field detected by a position sensor; [Figure 50] 10 is a graph illustrating a change in magnetic field strength depending on the moving distance of a moving part of a lens driving device of a comparative example. [Figure 51]10 is a graph showing a change in a magnetic field sensed by a position sensor according to a movement of a moving part in the lens driving device according to the embodiment; DETAILED DESCRIPTION OF THE INVENTION

[0047] The following examples are provided for illustrative purposes only and are not intended to be limiting of the invention. The reference numerals used to denote the components in the accompanying drawings are When describing the same configuration in other drawings, please be careful to use the same drawing symbols as much as possible. In addition, in the description of the embodiments, related publicly known functions or publicly known configurations may be used. If it is determined that the specific explanation of the embodiment unnecessarily obscures the gist of the embodiment, Detailed description of the features disclosed in the drawings may be omitted. The drawings and their components must be shown to the proper proportions. However, those skilled in the art will readily understand such details. can be done.

[0048] The following description of the embodiments illustrated in FIGS. 1 to 51 will be given using a Cartesian coordinate system (x, y, z). However, the embodiments are not limited to this, i.e., the embodiments can be described using other coordinate systems. In each figure, the x-axis and y-axis represent planes perpendicular to the optical axis. For convenience, the z-axis direction, which is the optical axis direction, is the first direction, the x-axis direction is the second direction, and the y-axis direction is the The first direction can be called the vertical direction, and the second and third directions can be called the vertical direction. can be horizontal.

[0049] First Example FIG. 1 shows a schematic perspective view of a camera module 1000 according to a first embodiment, and FIG. 1 shows an exploded perspective view of the camera module 1000 shown in FIG. 1, and FIG. 3 shows the bobbin 3 shown in FIG. 4 shows a front view of the camera module 1000 shown in FIG. 1, and FIG. 5 shows a perspective view of the camera module 1000 shown in FIG. FIG. 5 is a plan view of the camera module 1000 shown in FIG. 4 cut along line II′; FIG. 6 shows a lens driver in the camera module 1000 shown in FIG. 1 with the circuit board 80 removed. 1 shows a front view of the device 1000-1.

[0050] As shown in FIGS. 1 and 2, the camera module 1000 according to the first embodiment includes a lens The drive unit 1000-1, the printed circuit board 10, the image sensor 11, and the lens 32a are included. The lens driving device 1000-1 includes a base 20, a bobbin 30, a coil unit a lens barrel 32; a housing member (or a housing) 4; 0, drive magnet 41, upper elastic member 51 (or upper elastic member), lower elastic member ( or lower elastic member) 52, a cover member (or cover can) 60, a sensing unit and a The lens barrel 32 may include a substrate 80. However, it may not be an essential component of the lens driving device 1000-1. .

[0051] The cover member 60 may form the outer shape of the camera module 1000, as shown in the figure. The housing member 40 supporting the drive magnet 41 (described later) is disposed inside the cover member 60. It can also be placed on the side.

[0052] The base 20 can be coupled with a cover member 60 .

[0053] The bobbin 30 is attached to the interior space of the cover member 60 so as to be reciprocally movable in a direction parallel to the optical axis. The coil unit 31 can be attached to the outer peripheral surface of the bobbin 30. can.

[0054] The bobbin 30 has a lens barrel 32 therein in which at least one lens 32a is mounted. The lens barrel 32 may include a screw threaded into the bobbin 30, as shown in FIG. However, this is not a limitation, and However, the lens barrel 32 is directly fixed to the inside of the bobbin 30 by a method other than threading, or One or more lenses 32a are formed integrally with the bobbin 30 without the lens barrel 32. The lens 32a can be made up of a single lens, or two or more lenses can be used to separate the light. It can also be structured to form a school system.

[0055] Upper and lower elastic members 51 and 52 are attached to the upper and lower parts of the bobbin 30, respectively. One end of the upper elastic member 51 is connected to the bobbin 30. The other end can be connected to the cover member 60 or the housing member 40. For example, The elastic member 51 can be coupled to the upper or lower surface of the housing member 40. One end of the member 52 is connected to the bobbin 30, and the other end of the lower elastic member 52 is connected to the upper surface of the base 20. The base 20 also has a protrusion for coupling with the lower elastic member 52. The lower elastic member 52 has holes at positions corresponding to the protrusions. By forming a hole or recess, the protrusion and the hole or recess are By this connection, the lower elastic member 52 can be fixed and prevented from rotating. Also, adhesives or the like can be added to ensure firm fixation.

[0056] On the other hand, the upper elastic member 51 is integrally formed as shown in FIG. 2 has a two-part structure, that is, it is divided into two springs, and can receive power of different polarities. That is, the voltage can be applied via a terminal (or a terminal member) (not shown). The power is transmitted to the two springs of the lower elastic member 52, and this power is then fed to the bobbin 30. The voltage can be applied to the wound coil unit 31. For this purpose, the lower elastic member 5 2 and the coil unit 31 can be electrically connected by soldering or the like. That is, the two springs of the lower elastic member 52 and both ends of the coil unit 31 are soldered together. However, the embodiment is not limited thereto. On the other hand, the upper elastic member 51 is formed in a two-part structure, and the lower elastic member 52 is formed in an integral structure. It can also be done.

[0057] The upper and lower elastic members 51 and 52 support the movement of the bobbin 30 in both directions along the optical axis. That is, the bobbin 30 is spaced a fixed distance from the base 20. Therefore, the bobbin 30 can be controlled to move upward and downward from the initial position. The initial position of the bobbin 30 is the upper surface of the base 20, and the bobbin 30 is Only the movement can be controlled.

[0058] On the other hand, the coil unit 31 is a ring-shaped coil block connected to the outer circumferential surface of the bobbin 30. However, the present invention is not limited to this, and the coil may be directly connected to the bobbin 3. The coil unit 31 can be realized by winding a wire around the outer periphery of the coil 30. As shown in FIG. 3, the coil unit 31 is attached to a position close to the bottom surface of the bobbin 30. The shape of the bobbin 30 can include flat and curved surfaces.

[0059] Alternatively, the coil unit 31 made up of coil blocks can be polygonal, For example, the coil unit 31 may be octagonal. The coil unit 31 is formed flat without any curved surfaces. This is possible by taking into consideration the electromagnetic interaction with the driving magnet 41 disposed opposite to it. The surface of the drive magnet 41 facing the coil unit 31 is flat. If the surface of the coil unit 31 facing the drive magnet 41 is also flat, This is because it is possible to maximize the electromagnetic force. However, it is not limited to this, and it can be used in accordance with the design specifications. Therefore, the surfaces of the drive magnet 41 and the coil unit 31 are both curved or flat, Alternatively, one surface may be curved and the other flat.

[0060] In addition, the bobbin 30 has a coil unit 31 that can be coupled to the outer peripheral surface of the bobbin 30. The first surface is flat and corresponds to the plane, and the second surface is round and corresponds to the curved surface. The second surface may also be a flat surface. A groove 33 corresponding to an inner yoke 61 (to be described later) can be formed on the upper side of the two surfaces. The coil unit 31 can be disposed below the groove 33. That is, a part of the coil unit 31 may be disposed close to the recessed groove 33. However, the present invention is not limited to this, and instead of the inner yoke 61, A separate yoke may also be provided and attached.

[0061] The housing member 40 may be formed of a substantially hexahedral frame. The upper and lower surfaces of the elastic member 50 are provided with connecting members 51 and 52, respectively. A structure can be provided, and a drive magnet 41 can be attached to each surface. At this time, as shown in FIG. 2, the mounting hole (or the mounting hole) in which the driving magnet 41 is mounted is A magnet through hole 42a may be formed, but this is not a limitation. The drive magnet 41 is directly bonded to the inner peripheral surface of the housing member 40 without the need for a mounting hole 42a. In this way, the drive magnet 41 can be directly fixed to the housing member 40. When the drive magnet 41 is fixed to the housing member 40, the drive magnet 41 is directly joined and fixed to the side or corner of the housing member 40. It can also be set.

[0062] The housing member 40 may further include a through-hole 42b in addition to the mounting hole 42a. The through holes 42b can be formed in pairs facing each other as shown in the figure. That is, the magnet 70 faces the sensing magnet 70 described later. A through hole 42b larger than the size of the sensing magnet 70 is formed in the wall of the housing member 40. In this case, the through hole 42b may be square, circular, or polygonal. Alternatively, the housing member may be formed with four mounting holes 42a. 40 as it is, and drive magnets 41 are attached to the two mounting holes 42a, and the remaining two At least one of the holes can be used as the through hole 42b.

[0063] Also, unlike the embodiment, the lens driving device 1000-1 does not include a separate housing member 40. First, it can include only the cover member 60. The cover member 60 is made of a ferromagnetic material such as iron. The cover member 60 may be made of a metal material. In this case, the cover member 60 can be provided in a polygonal shape when viewed from above. The shape can be rectangular as shown in Figure 1, or can be octagonal as shown. When the cover member 60 is octagonal when viewed from above, the housing member 40 If the shape of the drive magnet 41 arranged at the corner of the The magnetic field emitted from the corners of the housing member 40 can be minimized.

[0064] The cover member 60 has an inner yoke 61 formed integrally at a position corresponding to the accommodation groove. According to the embodiment, one side of the inner yoke 61 is spaced from the coil unit 31 by a certain distance. The other side of the inner yoke 61 is spaced a certain distance from the bobbin 30. The inner yoke 61 can be arranged at the four corners of the housing member 40. The inner yoke 61 can be formed inward from the upper surface of the housing member 40. The inner yoke 61 can be bent in a direction parallel to the optical axis. However, the escape groove may be formed in a position close to the bent portion. The bent portion in which the escape groove is formed may be formed in a pair or symmetrically. The section where the escape groove is formed prevents the inner yaw when the bobbin 30 moves up and down. The interference between the wire 61 and the bobbin 30 can be minimized. In this case, the bobbin 30 is prevented from being partially damaged due to interference with the edge of the inner yoke 61. The end of the inner yoke 61 is at a fixed distance from the bottom of the groove 33 at the reference position. This is because the bobbin 30 must be spaced apart at the highest position during reciprocation. This is to prevent the end of the inner yoke 61 from contacting or interfering with the bottom surface of the recessed groove 33. In addition, the end of the inner yoke 61 is connected to the bobbin 30 in accordance with the design specifications. It can also function as a stopper to restrict movement to sections other than the designated area. In addition, if there is no separate housing member 40, the drive magnet 41 can be mounted on the cover member 41. Alternatively, the driving magnet 4 may be directly joined to the side or edge of the driving magnet 4. The magnetization direction of the magnet 1 can be a direction toward the bobbin 30 and a direction toward the cover member 60. However, this is not a limitation, and the magnetization direction may be changed depending on the design. Cut.

[0065] On the other hand, the sensing unit of the lens driving device 1000-1 according to the first embodiment senses the position of the bobbin 30. To this end, the sensing unit can perform the function of sensing the movement. The magnet 70 and the position detection sensor (or displacement detection unit) 82 may be included. The position sensor 82 can be mounted on the circuit board 80 .

[0066] The sensing magnet 70 is configured to be smaller and thinner than the driving magnet 41. As shown in the figure, the shape of the conductor can be square. However, this is not a limitation. However, it can be configured in a variety of shapes, such as rectangular, triangular, polygonal, and circular.

[0067] The sensing magnet 70 can be attached to the outer circumferential surface of the bobbin 30. For example, the magnet is fixed to a magnet mounting portion 72 provided on the bobbin 30 by adhesive or the like. In this case, the magnet mounting portion 72 is a rib-like portion protruding from the outer peripheral surface of the bobbin 30. The sensing magnet 70 may include, but is not limited to, a guide The rib-shaped guide can be formed as shown in FIG. It may have an opening on the underside and surrounds at least three sides of the sensing magnet 70. In this case, the protruding height of the guide of the magnet mounting portion 72 is The thickness of the sensing magnet 70 can be formed to be lower or higher. Therefore, if the sensing magnet 70 is fixed to the magnet mounting portion 72 with adhesive or the like, The sensing magnet 70 may or may not protrude outside the guide.

[0068] On the other hand, the sensing magnet 70 is placed in a position where it does not interfere with the coil unit 31. That is, as shown in FIG. 3, the coil unit 31 is attached to the underside of the bobbin 30. If attached, the sensing magnet 70 is disposed above the coil unit 31. This is because the coil unit 31 does not affect the up-and-down movement of the bobbin 30 in the optical axis direction. This is to prevent it from getting dirty.

[0069] As shown in FIG. 2, the sensing magnet 70 faces the driving magnet 41. That is, the two drive magnets 41 can be arranged so as not to overlap. They are provided in pairs and are arranged parallel to each other and facing each other. When the housing member 40 is provided in a square shape, the drive magnet 41 is attached to the The sensing magnet 70 is not attached to the position facing the surface. 2, the drive magnets 41 are arranged to face each other in the x-axis direction, which is the second direction. The sensing magnet 70 is attached in the y-axis direction, which is a third direction different from the second direction. It can be done.

[0070] In this way, the sensing magnet 70 is arranged so as not to face the driving magnet 41. The reason for arranging the sensing magnet 70 is that the change in the magnetic force of the driving magnet 41 The position sensor 82 accurately detects the movement of the bobbin 30 by preventing interference with the magnetic force. This is to allow for feedback.

[0071] As shown in FIG. 2, the circuit board 80 is connected to the bobbin 30, the housing member 40, or the cover portion. The seal 60 may be disposed in correspondence with at least one side wall of the seal 60. A cover member 60 can be provided to act as a guide can. The circuit board 80 can be disposed in close contact with the side wall of the cover member 60. 9. The cover member 60 can be fixed in contact with the outer surface or the inner surface of the window 9. 0. In addition, the circuit board 80 may be formed to have a thickness larger than that of the image sensor 100 described later. A terminal is disposed at one end of the wiring board 11 so as to be electrically connected to the printed circuit board 10 on which the wiring board 11 is mounted. 81. In addition, a current is applied to the coil unit 31 through the circuit board 80. In order to achieve this, the coil unit 31 is electrically connected directly to the circuit board 80 or The coil unit 31 is connected to two springs that are split into two parts of the lower elastic member 52, The two springs can be electrically connected to the circuit board 80. The coil unit 31 is electrically connected to the printed circuit board 10 via the circuit board 80. Electrical connection methods include soldering, conductive epoxy, and Ag epoxy. A variety of methods are possible.

[0072] At this time, a Hall sensor is provided on the inner surface of the circuit board 80. Since the position detection sensor 82 is disposed, the position detection sensor 82 must not be exposed to the outside. In addition, a window is provided on the side wall of the cover member 60 corresponding to the position sensor 82. 90 is provided, and the housing member 40 may also have a through hole 42b formed therein. The position sensor 82 passes through the window 90 and is then pulled out from the sensing magnet 70. The housing member 40 may be formed with a predetermined distance therebetween. The through hole 42b corresponds to the mounting portion 42a for mounting the drive magnet 41. It may also be formed into a shape having a width and height larger than that of the sensing magnet 70. It can also be formed in a through hole.

[0073] Furthermore, a plurality of terminals 81 can be provided on the circuit board 80. The terminals 81 are positioned The position sensor 82 outputs a detection signal and applies current to the coil unit 31. can be done.

[0074] The camera module 1000 or lens driving device 1000-1 according to the first embodiment described above In this case, the movement of the bobbin 30 in the optical axis direction is fed back by the sensing magnet 70. This reduces the time required for autofocusing. Cut.

[0075] In addition, the coil unit 31 is wound around the bobbin 30, and the outer wall of the bobbin 30 A thin and light sensing magnet 70 is attached to the The position detecting sensor 82 is tightly mounted on one side wall of the camera module 1000. By configuring the sensor in a fixed position, it is possible to achieve more precise and fast automatic operation without risk of deterioration in response characteristics. It can perform focusing function.

[0076] In addition, the center of the position sensor 82 and the center of the sensing magnet 70 must be aligned. The vertical length of the sensing magnet 70 (the two magnetized parts) is the position detection sensor 8 2. Also, the sensing portion of the position sensor 82 is opposite to the sensing portion of the position sensor 82. The surface of the sensing magnet 70 is magnetized in two parts, allowing it to sense position. be.

[0077] The vertical length of the through hole 42b and / or the window 90 moves in the vertical direction of the bobbin 30. The sensing magnet 70 is larger in size than the space and / or position sensing sensor 82. can be achieved.

[0078] The position sensor 82 may be a zyro sensor, an angular velocity sensor, an acceleration sensor, Any sensor that can detect position, such as a photoreflector, is possible. be.

[0079] In addition, an image sensor 11 can be mounted on the printed circuit board 10. The plate 10 may form the bottom surface of the camera module 1000 .

[0080] The base 20 can be coupled to the housing member 40. The base 20 has a print head. A terminal member may be separately attached for electrical connection to the power board 10. In this case, such a terminal member is formed integrally with the base 20 using a surface electrode or the like. It can also be done as follows.

[0081] Second Example FIG. 7 is a schematic perspective view of a lens driving device 2000 according to a second embodiment, and FIG. 8 is a perspective view of the lens driving device 2000 according to the second embodiment. 9 shows a schematic exploded perspective view of the lens driving device 2000 according to the embodiment of the present invention. 7 is a schematic perspective view of an embodiment of the lens driving device 2000 with the cover can 102 removed from the lens driving device 2000. The figure is shown.

[0082] The lens driving device 2000 according to the second embodiment drives a lens (not shown) in a camera module. Adjust the distance between the lens (not shown) and the image sensor (not shown) to ensure that the image sensor is In other words, the lens driving device 2000 is a device that moves the lens to the focal length of the lens. It is a device that performs fast focusing functions.

[0083] As shown in FIGS. 7 to 9, the lens driving device 2000 according to the second embodiment includes a cover. 102, bobbin 110A, first coil 120, drive magnet 130, housing part the upper elastic member 150A, the lower elastic member 160A, the first circuit board 170A, and the displacement The sensing unit (or position sensor) 180, the sensing magnet 182A and the base 1 90. Here, the cover can 102, the bobbin 110A, the first coil 12 0, drive magnet 130, housing member 140, upper elastic member 150A, lower elastic member Member 160A, first circuit board 170A, displacement sensing unit 180, sensing magnet 182 A and the base 190 are the cover member 60, the bobbin 30, the coil unit 31, and the like shown in FIG. A driving magnet 41, a housing member 40, an upper elastic member 51, a lower elastic member 52, a rotating The substrate 80, the position sensor 82, the sensing magnet 70 and the base 20 are Therefore, the components 60, 30, and 31 according to the first embodiment can perform the same function. The explanations for 1, 41, 40, 51, 52, 80, 82, 70, and 20 are based on the second embodiment. Components 102, 110A, 120, 130, 140, 150A, 160A, and 170A , 180, 182A, and 190. Base 102, 110A, 120, 130, 140, 150A, 160A, 170A, 180 , 182A, 190 are the same as those of the components 60, 30, 31, 41 according to the first embodiment. , 40, 51, 52, 80, 82, 70, and 20 can also be applied.

[0084] The cover can 102 can be box-shaped as a whole and is attached and fixed to the top of the base 190. It can be configured to contact, fix, temporarily fix, support, connect or be positioned. The ring 102 is attached to, fixed to, contacted with, fixed to, temporarily fixed to, supported by, connected to, or positioned on the base 190. In the accommodation space, a bobbin 110A, a first coil 120, a driving magnet 130, a hand Housing member 140, upper elastic member 150A, lower elastic member 160A, first circuit board 17 0A, the displacement sensing unit 180 and the sensing magnet 182A can be accommodated.

[0085] The cover can 102 has a lens (not shown) on the top surface thereof, which is connected to the bobbin 110A. It may further include an opening 101 that allows exposure to light. The camera may be provided with a window made of a light-transmitting material, which allows the camera to This can prevent foreign matter such as dust and moisture from penetrating into the interior of the module.

[0086] The cover can 102 includes a first groove 104 formed in the lower part, and a base 190 formed in the upper part. In this case, as will be described later, the cover can 10 may include a second groove portion 192 formed therein. When the 2 is attached, fixed, contacted, fixed, temporarily fixed, supported, joined or positioned on the base 190, The second groove 104 is formed in the portion in contact with the first groove 104 (i.e., the position corresponding to the first groove 104). The first groove portion 104 and the second groove portion 192 may be contacted, arranged, or connected. By bonding the adhesive, a groove having a certain area can be formed. The adhesive, for example, epoxy, can be applied by injection. The adhesive member is inserted through the groove to close the gap (g ap) is buried, and the cover can 102 is attached to the base 190, fixed, contacted, fixed, temporarily fixed, and supported. can be held, bonded or positioned to provide a seal between the cover can 102 and the base 190; The cover can 102 is attached to, fixed in, in contact with, fixed to, temporarily fixed in, supported by, connected to, or It can be placed and the sides sealed or bonded.

[0087] The cover can 102 may further include a third groove 106. The portion 106 is formed on a surface corresponding to the terminal surface of the first circuit board 170A, and the portion 106 is formed on the terminal surface. The third groove 106 prevents the plurality of terminals 171 and the cover can 102 from interfering with each other. The recess may be formed over the entire surface of the first circuit board 170A facing the terminal surface, By applying an adhesive material to the inside of the third groove portion 106, the cover can 102 and the base 19 0 and first circuit board 170A can be sealed or bonded together.

[0088] The first groove 104 and the third groove 106 are formed in the cover can 102, and the second groove 192 is However, the embodiment is not limited to this. The first to third grooves 104, 192, 106 are formed only in the base 190, or may be formed only on the cover can 102.

[0089] In addition, the material of the cover can 102 described above may include metal. There is no limitation to the material of the can 102. The cover can can also be made of a magnetic material.

[0090] The base 190 may be formed in a square shape as a whole, and the lower periphery of the base 190 may be formed in a square shape. The step portion may include a step portion that protrudes outward by a predetermined thickness so as to surround the surface of the substrate. The predetermined thickness of the step portion can be determined by the thickness of the cover. The thickness of the cover can 102 is the same as the thickness of the side of the cover can 102, and the cover can 102 is attached, fixed, and bonded to the base 190. When touching, fixing, temporarily fixing, supporting, joining or placing, the side of the cover can 102 is Attached, fixed, contacted, joined, secured, supported or placed on the top or side of the step part of 90 As a result, the cover can 102 coupled to the upper side of the step portion can be guided by the step portion. The end of the cover can 102 can be fitted to the step portion so as to come into surface contact with the step portion. Here, the end of the cover can 102 may include a bottom surface or a side surface. At this time, the step portion and the end of the cover can 102 are bonded or joined together with an adhesive or the like. can be sealed.

[0091] The step portion has a second groove portion 192 at a position corresponding to the first groove portion 104 of the cover can 102. As described above, the second groove portion 192 may be formed in the first groove of the cover can 102. The groove 104 is coupled with the portion 104 to form a recessed groove, which can form a space to be filled with an adhesive material.

[0092] Similar to the cover can 102, the base 190 may include an opening near the center. The opening is formed at a position corresponding to the position of the image sensor located in the camera module. It is possible.

[0093] The base 190 also has four guides protruding upward at a right angle from the four corners by a predetermined height. The guide member 194 may have a polygonal column shape. The guide member 194 is attached to and inserted into a lower guide groove 148 of the housing member 140, which will be described later. It can be fixed, contacted, joined, fixed, supported or positioned. 94 and the lower guide groove 148, the housing member 140 is attached to the top of the base 190. When secured, contacted, coupled, fixed, supported or positioned, the housing member on the base 190 The position of the bond, such as 140, can be guided, and the bond area can be increased. Furthermore, the housing member 140 may be damaged by vibration during the operation of the lens driving device 2000. Or, during the joining process, the operator may make a mistake and the part may move away from the reference position where it should be attached. It can be prevented.

[0094] FIG. 10 shows a schematic perspective plan view of a housing member 140 according to another embodiment, and FIG. 1 shows a schematic bottom perspective view of a housing member 140 according to another embodiment, and FIG. 12 shows a schematic bottom perspective view of a housing member 140 according to another embodiment. The driving magnet 130, the housing member 140, the first circuit board 170A, and 13 shows a schematic exploded perspective view of the displacement sensing unit 180, and FIG. 13 is a plan oblique view of the upper elastic member 150A. 14 shows a perspective view of the lower elastic member 160A, and FIG.

[0095] 10 to 12, the housing member 140 is generally hollow and columnar (for example, As shown, the housing member 140 may be a hollow rectangular prism. It has a shape that supports one or more drive magnets 130 and a first circuit board 170A, and The bobbin 110A is configured to be movable in the z-axis direction, which is the first direction, relative to the housing member 140. The bobbin 110A can be accommodated in this manner.

[0096] The housing member 140 may include four flat sides 141. The side surface 141 of the magnet 140 has an area corresponding to or larger than the driving magnet 130. It can be easily formed.

[0097] As shown in FIG. 12, the housing member 140 has four side surfaces 141, each of which faces the other. 1. On each of the two sides, a driving magnet 130 is attached, inserted, fixed, contacted, coupled, and fixed. , through holes (or recesses) 141a, 141b for magnets that can be supported or placed The magnet through holes 141a and 141a' can be formed with a driving magnet. The net 130 may have a size and / or shape corresponding to the drive magnet. It is also possible for the first and second magnets to have a shape that can guide the magnet 130. Each of the magnet through holes 141a and 141a' is provided with one of the drive magnets 130 (hereinafter referred to as , 'first driving magnet 131') and another one (hereinafter, 'second driving magnet 13 2') can be attached, inserted, fixed, contacted, joined, fixed, supported or positioned, respectively. In the embodiment, only two drive magnets 130 are shown, but the embodiment However, the present invention is not limited to this. In other words, four drive magnets 130 may be arranged. It goes without saying.

[0098] The types of the drive magnet 130 mentioned above are ferrite, alnico ( They can be broadly classified into internal magnet type, rare earth magnet, and so on, depending on the form of the magnetic circuit. They can be classified into two types: P-type and F-type. There is no limitation on the type of the drive magnet 130.

[0099] Among the four side surfaces 141 of the housing member 140, one side surface perpendicular to the first side surface or On the surfaces other than the first two side surfaces, a displacement sensor 180 (to be described later) is attached, inserted, fixed, contacted, connected, A through hole 141b or groove (not shown) for a sensor to be fixed, supported or placed is formed. The sensor through-hole 141b has a size and thickness corresponding to the displacement sensing unit 180 described later. and is located a predetermined distance from the first and second magnet through holes 141a, 141a'. The sensor through-holes 141b can be formed at intervals. In the side surface 141, the first circuit board 170A is attached, fixed, contacted, coupled, fixed, temporarily fixed, It can be formed on a supported or positioned side.

[0100] In addition, a first circuit board 170A is attached, fixed, and contacted to one side of the housing member 140. At least one mounting protrusion for connecting, fixing, temporarily fixing, supporting or positioning A section 149 may be provided.

[0101] The mounting protrusion 149 is mounted in a mounting through hole 173 formed in the first circuit board 170A. It can be inserted, fixed, contacted, joined, fixed, temporarily fixed, supported or positioned. The fitting through hole 173 and the fitting protrusion 149 are in contact with each other by form-fitting or interference fit. These 173, 149 may be connected or combined, but the first circuit board 170A is connected to the housing. The term "attached," "fixed," "contacted," "coupled," "fixed," "temporarily fixed," "supported," or "positioned" refers to a device that is attached to, fixed in, contacted with, connected to, fixed to, temporarily fixed in, supported by, or positioned on the housing member 140. You can also simply guide them.

[0102] Here, one of the four side surfaces 141 of the housing member 140 opposite to the other side surface is flat. It can be configured as, but is not limited to,

[0103] Although not shown, second side surfaces of the housing member 140 perpendicular to the first side surfaces are Third and fourth magnet through holes may also be arranged in the first and second magnet holders.

[0104] At this time, the first magnet through hole 141a and the second magnet through hole 141a' are The housing member 140 has a size and shape that is the same as the overall length of the first two sides of the housing member 140 in the lateral direction (almost the entire length of the first two sides of the housing member 140). ) They can have the same horizontal length. Meanwhile, the third magnet through hole and The four magnet through holes have the same size and shape, but the first magnet through hole The horizontal length is smaller than that of the hole 141a and the second magnet through hole 141a'. This is because the sensor is attached to the second side where the through hole for the third or fourth magnet is formed. Since the sensor through-hole 141b must be formed, This is to ensure sufficient space.

[0105] The first drive magnet 131 and the second drive magnet 132 have the same size and and has a lateral length substantially equal to the lateral length of the first side surfaces of the housing member 140. As described above, the third and fourth magnet through holes (not shown) are provided. (without regard to the above) The third and fourth drive magnets (not shown) have the same size and shape. and the first driving magnet 131 and the second driving magnet 132 are arranged laterally. The length of the electrode can be made small.

[0106] Here, similarly to the first and second magnet through holes 141a, 141a', the third and fourth The magnet through holes are aligned symmetrically with respect to the center of the housing member 140. That is, the third and fourth driving magnets (not shown) can be arranged in the housing. The center of the ring member 140 is the reference point, or the center is the reference point, and the ring members 140 are symmetrical to each other on a straight line. can be placed in

[0107] The first and second drive magnets 131, 132 or the third and fourth drive magnets are The housing members 140 are arranged to face each other while being biased to one side regardless of the center of the housing member 140. When the coil 120 of the bobbin 110A is rotated, the electromagnetic force acts on the first coil 120 of the bobbin 110A in a biased manner. In other words, there is a possibility that the bobbin 110A may tilt. Similarly to the moving magnets 131 and 132, the third and fourth driving magnets are mounted in the housing. By arranging the bobbins 11 symmetrically on a straight line with respect to the center of the material 140, Since an electromagnetic force that does not deflect can be applied to 0A and the first coil 120, the bobbin 11 can be guided so that it can move easily and accurately in the first direction of 0A.

[0108] Hereinafter, for convenience of explanation, it is assumed that the lens driving device 2000 according to the first embodiment has only the first and second driving magnets 131 and 132, but the following description is also applicable when the third and fourth driving magnets are further included.

[0109] A plurality of first stoppers 143 can be provided protruding from the upper surface of the housing member 140. The first stopper 143 is for preventing the collision between the cover can 102 and the main body of the housing member 140, and when an external impact occurs, it can prevent the upper surface of the housing member 140 from directly colliding with the inner upper surface of the cover can 1 The first stopper 143 can also serve to guide the installation position of the upper elastic member 150A. For example, referring to FIGS. 9 and 13, a guide groove 155 having a corresponding shape can be formed at a position corresponding to the first stopper 143 in the upper elastic member 150A.

[0110] <00,009,33> Also, on the upper side of the housing member 140, a plurality of upper frame support protrusions 144 for inserting, fixing, contacting, fixing, temporarily fixing, coupling, supporting or arranging the outer frame 152 of the upper elastic member 150A can be provided protruding. A first through hole (or recess) 152a having a corresponding shape can be formed in the outer frame 152 of the upper elastic member 150A corresponding to the upper frame support protrusion 144. After the upper frame support protrusion 144 is inserted, fixed, contacted, fixed, temporarily fixed, coupled, supported or arranged in the first through hole 152a, it is fixed by an adhesive or fusion. ​ The fusing may include heat fusing or ultrasonic fusing.

[0111] Further, an outer frame 162 of a lower elastic member 160A is provided on the lower side of the housing member 140. A plurality of lower frame support protrusions 147 may be provided to be coupled to the lower frame. The support protrusions 147 are formed at the four corners of the lower side of the housing member 140. 14, the lower frame support protrusion 147 is located at a position corresponding to the lower frame support protrusion 147. The outer frame 162 of the elastic member 160A is attached to the lower frame support protrusion 147 and inserted. A fastening (or insertion) that can be fixed, contacted, joined, secured, temporarily secured, supported or positioned. A recess or hole 162a may be formed, which may be secured by adhesive or fusion. The fusing may include heat fusing or ultrasonic fusing.

[0112] The housing member 140 is a yoke housing member that can function as a yoke. In the structure of the yoke housing member, the upper elastic member 150A can be The bobbin 110A can be formed so as to be spaced apart from the inner surface of the top surface of the yoke. This is to prevent the upward movement of the yoke from interfering with it.

[0113] Alternatively, the yoke (not shown) itself can serve as the housing member 140. In this case, the yoke can be coupled to the base 190, and the upper elastic member 150A can be located below the yoke or inside the yoke.

[0114] According to another embodiment, a separate cover may be further disposed on top of the yoke. In this case, the upper elastic member 150A is disposed on the top of the yoke or between the yoke and the cover. The upper elastic member 150A can be connected to the cover or yoke. can be done.

[0115] On the other hand, the driving magnets 130, 131, and 132 are provided with magnet through holes 141a and 141b. 1a' can be fixed to the other end of the substrate 1a' with adhesive, but this is not limiting. An adhesive material such as a surface tape can also be used. Unlike the original, the through holes 141a and 141a' for the first and second magnets are replaced by The housing member 140 has a groove-shaped magnet fixing portion (not shown) formed on its inner surface. The magnet fixing portion has a size corresponding to the size and shape of the driving magnet 130. The thickness and shape can be varied.

[0116] The driving magnet 130 faces the first coil 120 located on the outer circumferential surface of the bobbin 110A. The drive magnet 130 can be mounted in a position that matches the magnet. The components may be configured separately, or may be configured integrally, unlike the illustrated example. According to the embodiment, the surface of the bobbin 110A facing the first coil 120 is the N pole, and the outer surface is the S pole. The drive magnet 130 can be arranged so that the polarity is the same. It is not intended to be limiting, but the opposite configuration is also possible.

[0117] The driving magnet 130 is configured to be divided into two by a plane perpendicular to the optical axis. That is, the driving magnet 130 is a bipolar magnetized magnet, They are arranged facing each other across a non-magnetic partition wall (not shown) in a plane perpendicular to the optical axis. The magnet may be made up of a first magnet (not shown) and a second magnet (not shown). Here, the non-magnetic partition wall may be air or a non-magnetic material. The first and second magnets may be arranged to have opposite polarities to each other, but in the preferred embodiment The magnet is not limited to this, and may have various other shapes. 7a, 37b, 43a and 43b, which are described in detail below.

[0118] The first and second drive magnets 131 and 132 are formed in a rectangular parallelepiped shape with a certain width. , are fixed in the first and second magnet through holes 141a, 141a', respectively, and the first and The wide surfaces or a part of the surfaces of the second driving magnets 131 and 132 are the side surfaces of the housing member 140. The first and second driving magnets may be formed as a part of the outer or inner surface. 131 and 132 are disposed on the side of the housing member 140 and are the inside of the yoke described above. It may also be located or coupled to the side and coupled to the inner surface of the yoke without the housing member 140. In this case, the driving magnets 131 and 132 facing each other may be joined or fixed. 32 can be arranged parallel to each other. The first coil 120 of the first embodiment is arranged in a plane so that the opposing surfaces of the first coil 120 are parallel to each other. However, this is not a limitation, and depending on the design, a drive magnet may be used. Only one of the first coil 130 and the first coil 120 of the bobbin 110A is flat, and the other is curved. Alternatively, the first coil 120 of the bobbin 110A and the driving magnet The opposing surfaces of the bobbin 110A may be curved. The curvatures of the opposing surfaces of the coil 120 and the driving magnet 130 may be the same. .

[0119] As described above, the housing member 140 has a sensor through-hole 141b on one side thereof. A displacement sensing unit 180 is attached and inserted into the sensor through-hole 141b or groove. , fixed, contacted, joined, fixed, temporarily fixed, supported or positioned, and the displacement sensing unit 180 is soldered The first circuit board 170A may be electrically connected to one side of the first circuit board 170A by means of gaskets or soldering. In other words, the first circuit board 170A is centered among the four sides 141 of the housing member 140. The through-hole 141b for the sensor or the outer surface of one side on which the groove is provided is attached, inserted, fixed, contacted, or connected. It can be fitted, fixed, temporarily fixed, supported or positioned.

[0120] The sensing unit may also sense / determine a first displacement value in a first direction of the bobbin 110A. For this purpose, the sensing unit includes a displacement sensing portion 180 and a sensing magnet 18 The displacement sensing part 180 and the sensor through hole 141b or groove may include a sensor. The magnet 182A may be disposed at a position corresponding to the position of the single magnet 182A. The sensing magnet 182A is divided into two parts, upper and lower, to increase the strength of the magnetic field. However, the embodiment is not limited thereto.

[0121] The displacement sensing portion 180 is released from the sensing magnet 182A of the bobbin 110A. For example, the displacement sensor 180 may be a sensor that senses a change in magnetic force. According to another embodiment, the sensor may be a magnetic sensor, but the embodiment is not limited thereto. Any sensor that can detect changes in energy other than the Hall sensor can be used. The sensor can be used as the position sensing unit 180 and can sense the position other than the magnetic force. Any type of sensor is possible, and a method using a photoreflector is also possible. When the displacement sensor 180 is implemented as a Hall sensor, the Hall sensor The Hall voltage difference with respect to the change in the detected magnetic flux (i.e., magnetic flux density) Calibration of the actuator driving distance is further performed based on the For example, if the displacement sensor 180 is implemented as a Hall sensor, the Hall sensor The pins 180 may have multiple pins. For example, the multiple pins may include a first and a second pin. The first pin may include pins 1-1 and 1-2, which are respectively connected to a voltage and a ground. The second pin may include pins 2-1 and 2-2 that output the sensed results. Here, the sensor output via pins 2-1 and 2-2 is The sampled result may be in the form of a current, but the embodiment is not limited to the form of a signal. The circuit board 170A is connected to the Hall sensor 180 and supplies power to pins 1-1 and 1-2. It serves to provide a source and receive signals from pins 2-1 and 2-2.

[0122] The first circuit board 170A is attached, inserted, fixed, contacted, or connected to one side of the housing member 140. In this case, the first circuit board 170A can be fixed, temporarily fixed, supported or placed. As described above, by including the mounting through-hole 173 or groove, one of the housing members 140 The installation position can be guided by the mounting protrusions 149 formed on the side. The wearing protrusion 149 may be formed in one or more. When two or more wearing protrusions 149 are formed, the first This makes it easier to guide the placement position of the circuit board 170A.

[0123] The first circuit board 170A has a plurality of terminals 171 arranged thereon, and receives an external power supply and The necessary current can be supplied to the first coil 120 and the displacement sensing unit 180 of the pin 110A. The number of terminals 171 formed on the first circuit board 170A depends on the type of components that need to be controlled. For example, the number of terminals 171 on the first circuit board 170A can be increased or decreased by The power supply terminal for receiving an internal power supply and the I2C communication terminal may be included. One is a terminal connected to the supply voltage, the other is a power terminal connected to the ground. It is possible.

[0124] 9 and 12, the first circuit board 170A has at least one pin. The number of pins 172 can be four, or more than four. For example, four pins 172 can be test pins, holes (h pin, VCM+ pin and VCM- pin, but an embodiment is The test pin is not limited to a specific type. The hole pin can be a pin used to detect the position of the hole. The VCM+ pin and VCM The pin is in the state where it does not receive feedback from the displacement sensor 180, and the lens driver 20 This can be a pin used to evaluate the performance of the 00.

[0125] According to an embodiment, the first circuit board 170A can be formed of an FPCB. As described in the foregoing example, the lens driving device 2000 has been described as including the displacement sensing unit 180. However, in some cases, the displacement sensing unit 180 can be omitted.

[0126] Also, in the foregoing example, the first circuit board 170A has been described as being mounted, inserted, fixed, contacted, coupled, fixed, temporarily fixed, supported, or disposed on the outer surface of the housing member 140. However, the embodiment is not limited thereto. That is, according to another embodiment, when the lens driving device 2000 does not include the displacement sensing unit 180, the first circuit board 170A can be located below the housing member 140 instead of on the outer surface of the housing member 140.

[0127] FIG. 15 shows a plan perspective view of the bobbin 110A shown in FIG. 8 according to another embodiment, and FIG. 16 shows a bottom perspective view of the bobbin 110A shown in FIG. 8 according to another embodiment.

[0128] Referring to FIGS. 10, 11, and 13 to 16, the upper elastic member 150A and the lower elastic member 160A can elastically support the upward and / or downward movement of the bobbin 110A in the optical axis direction. The upper elastic member 150A and the lower elastic member 160A can be formed of leaf springs. However, the embodiment is not limited to the respective shapes of the upper and lower elastic members 150A and / or 160A. [[ID=3色]]

[0129] The upper elastic member 150A can include an inner frame 151 coupled to the bobbin 110A, an outer frame 152 coupled to the housing member 140, and a connecting portion 153 connecting the inner frame 151 and the outer frame 152.

[0130] ​​The lower elastic member 160A is connected to the inner frame 161, the lower elastic member 160A is connected to the bobbin 110A, and the lower elastic member 160B is connected to the inner frame 161. The outer frame 162 is connected to the housing member 140, and the inner frame 161 and the outer frame It may include a connecting portion 163 that connects the frames 162 together.

[0131] The connecting portions 153 and 163 are folded at least once to form a pattern of a predetermined shape. The bobbin 110 can be rotated by the positional change and minute deformation of the connecting portions 153 and 163. A is a flexible (or elastic) movement of the lift and / or lower in the first direction, which is the optical axis direction. can be supported.

[0132] According to one embodiment, as shown in FIG. 13, the upper elastic member 150A is attached to the outer frame 15 The inner frame 152 includes a plurality of first through-holes 152a, and the inner frame 151 includes a plurality of second through-holes 151a. It can be done.

[0133] The first through-hole 152a is formed on the upper surface of the housing member 140 by the upper frame support protrusion 1. 44, and the second through-hole 151a is connected to the upper support protrusion 11 formed on the top surface of the bobbin 110A. Can be combined with 3.

[0134] The upper support protrusions 113 will be described in detail later. The device is attached to, fixed in, contacted with, fixed temporarily to, or supported by the housing member 140 through the first through-hole 152a. The inner frame 151 is held, arranged or joined to the bobbin 110A through the second through-hole 151a. It can be attached, fixed, contacted, secured, temporarily secured, supported, positioned or joined to.

[0135] The connecting portion 153 of the upper elastic member 150A connects the inner frame 151 to the outer frame 152. The inner frame 151 and the outer frame 152 are arranged so as to be elastically deformable within a predetermined range in the first direction. The system 152 can be connected.

[0136] At least one of the inner frame 151 and the outer frame 152 of the upper elastic member 150A The first coil 120 of the bobbin 110A and the first circuit board 170A are electrically connected to each other. The battery may include at least one terminal part that is electrically connected.

[0137] Referring to FIG. 14, the lower elastic member 160A is made of a plurality of elastic members formed on the outer frame 162. The fastening portion 162a is provided through a plurality of third through-holes (or recesses) formed in the inner frame 161. 161a.

[0138] As described above, the fastening portion 162a is attached to, inserted into, fixed to, or attached to the underside of the housing member 140. The third through-hole 161a can be contacted, coupled, fixed, temporarily fixed, supported or positioned. The lower support protrusions 114 formed on the lower surface of the bobbin 110A shown in FIG. That is, the outer frame 162 can be fixed to the housing 160 via the fastening portion 162a. The casing member 140 is attached, inserted, fixed, contacted, joined, fixed, temporarily fixed, supported, or placed. The inner frame 161 can be attached to and inserted into the bobbin 110A through the third through-hole 161a. It can be inserted, fixed, contacted, joined, secured, temporarily secured, supported or positioned.

[0139] The connecting portion 163 of the lower elastic member 160A connects the inner frame 161 to the outer frame 162. The inner frame 161 and the outer frame 162 are arranged so as to be elastically deformable within a predetermined range in the first direction. The system 162 can be connected.

[0140] The lower elastic member 160A is made up of a first lower elastic member 160a and a second lower elastic member 160b which are separated from each other. With this two-part structure, the lower elastic member 160A can be The first lower elastic member 160a and the second lower elastic member 160b are connected to power supplies of different polarities or power supplies of different polarities. That is, the inner frame 161 and the outer frame 162 can receive different currents. After being coupled to the bobbin 110A and the housing member 140, Solder portions are provided at positions on the inner frame 161 corresponding to both ends of the first coil 120. By performing a conductive connection such as soldering at the solder part, power supplies or The first lower elastic member 160a can receive different currents. The second lower elastic portion 20 is electrically connected to one end of the first coil 120, and the second lower elastic portion 20 is electrically connected to the other end of the first coil 120. The material 160b is electrically connected to receive current and / or voltage from the outside. For this reason, the inner frame 161 and the outer frame 162 of the lower elastic member 160A can be At least one of the coils 62 is connected to the first coil 120 of the bobbin 110A or the first circuit board 170. A may include at least one terminal part electrically connected to at least one of the terminal parts. The ends of the coil 120 can be arranged on opposite sides of the bobbin 110A. Alternatively, they can be positioned adjacent to each other on the same side.

[0141] On the other hand, the upper elastic member 150A, the lower elastic member 160A, the bobbin 110A, and the housing The assembly member 140 is assembled by bonding using heat fusion and / or adhesive. In this case, the assembly procedure involves fixing the board with adhesive after heat fusion. The fixing work can be completed by bonding.

[0142] In another embodiment, the upper elastic member 150A is configured in two separate parts as shown in FIG. The lower elastic member 160A may be configured as an integral structure as shown in FIG. Cut.

[0143] FIG. 17 shows a bobbin 110A, a first coil 120, a displacement sensing unit 180, and FIG. 18 shows an exploded perspective view of a sensing magnet 182A, and FIG. 18 shows a bobbin 1 according to another embodiment. 10A, first coil 120, first and second driving magnets 131 and 132, displacement sensor 180 and sensing magnet 182A are shown in schematic bottom views.

[0144] The bobbin 110A is attached to the inner space of the housing member 140 so as to be reciprocally movable in the optical axis direction. The first coil 120 is attached to the outer circumferential surface of the bobbin 110A. The bobbin 110A is electromagnetically coupled to the driving magnet 130 of the housing member 140. It can be moved back and forth in a first direction.

[0145] In addition, the bobbin 110A moves in the first direction, which is the optical axis direction, to perform the autofocus function. As shown, the bobbin 110A is supported by the upper elastic member 150A and the lower elastic member 160A. It can be resiliently (or elastically) supported.

[0146] Although not shown, the bobbin 110A has at least one lens attached thereto. It can be inserted, fixed, contacted, joined, secured, temporarily secured, supported or positioned. The lens 110A includes a lens barrel (not shown) in which at least one lens is mounted. The lens barrel is a component of the camera module, which will be described later, and It is not an essential component of the lens driving device. For example, the bobbin 110A may have a female screw on the inner surface thereof. A male screw portion corresponding to the female screw portion is formed on the outer peripheral surface of the lens barrel, and these screws The lens barrel can be connected to the bobbin 110A by the connection. The bobbin 110A does not have a threaded portion formed on its inner circumferential surface, and the lens barrel is attached to the bobbin. It can also be fixed directly to the inside of 110A by a method other than screwing.

[0147] Alternatively, one or more lenses may be integrally formed with the bobbin 110A without a lens barrel. The lens barrel may be made of one lens, two lenses, or a combination of two or more lenses. The above lenses can also be configured to form an optical system.

[0148] In addition, a plurality of upper support protrusions 113 and a plurality of lower support protrusions are provided on the upper and lower surfaces of the bobbin 110A. The upper support protrusions 113 may be provided with protrusions 114 as shown in FIG. As shown in the figure, the upper elastic member 150A can be formed in a cylindrical or polygonal column shape. The shaft 151 and the bobbin 110A can be connected, fixed, temporarily fixed, contacted, or supported. For example, the upper support protrusion 113 of the inner frame 151 of the upper elastic member 150A corresponds to the upper support protrusion 113 of the inner frame 151. At this time, the second through-hole 151a may be formed at the position where the upper support protrusion 113 and the second through-hole 151b are formed. The two through holes 151a can be fixed by heat fusion or by an adhesive such as epoxy. Also, a plurality of upper support protrusions 113 may be provided. The distance between the upper support protrusions 113 is within a range that can avoid interference with surrounding components. That is, the distances can be set symmetrically with respect to the center of the bobbin 110A. The upper support protrusions 113 may be arranged at regular intervals, and if the intervals are not regular, However, the bobbin 110A is formed symmetrically with respect to a specific imaginary line passing through the center of the bobbin 110A. It can also be done.

[0149] As shown in FIG. 16, the lower support protrusion 114 is cylindrical or The lower elastic member 160A may be formed in a polygonal column shape, and the inner frame 161 and the bobbin The electrode 110A can be connected, fixed, temporarily fixed, contacted or supported. The lower support projection 114 of the bobbin 110A is provided on the inner frame 161 of the side elastic member 160A. In this case, the third through-hole 161a may be formed at a position corresponding to the lower support protrusion 1. The third through-hole 161a and the first through-hole 161b can be fixed by heat fusion or by an adhesive such as epoxy. Also, as shown in FIG. 16, a plurality of lower support protrusions 114 may be provided. In this case, the distance between the lower support protrusions 114 is set to be equal to the distance between the peripheral components. The bobbin 1 can be appropriately set within a range that can avoid interference. The lower support protrusions 114 are arranged symmetrically about the center of the support member 10A at regular intervals. It can also be done as follows.

[0150] The upper and lower surfaces of the bobbin 110A are provided with a connecting portion 153 and a connecting portion 154 of the upper elastic member 150A. The upper escape groove 112 and the lower escape groove 113 are provided at positions corresponding to the connecting portion 163 of the lower elastic member 160A. Grooves 118 can be formed respectively.

[0151] By providing the upper escape groove 112 and the lower escape groove 118, the bobbin 110A can be easily attached to the housing. When the bobbin 11 moves in the first direction relative to the bobbin member 140, the connecting portions 153 and 163 are connected to the bobbin 11. 0A, the spatial interference with the connecting portions 153 and 163 can be more easily elastically deformed. The position of the upper escape groove 112 or the lower escape groove 118 can be determined as shown in FIG. As shown in FIG. 16, the elastic member 110 may be disposed at a corner of the bobbin 110. The shape and / or location of the connection may also allow it to be positioned laterally.

[0152] The first coil 120 is attached, inserted, fixed, contacted, and connected to the outer peripheral surface of the bobbin 110A. Coil fixing groove (or coil fixing portion) 116 for fixing, fixing, temporarily fixing, supporting or placing However, the embodiment is not limited to this. The first coil 120 is directly attached, inserted, fixed, contacted, connected, or fixed to the outer circumferential surface of the bobbin 110A. Instead of being fixed, temporarily fixed, supported or arranged, the outer peripheral shape of the bobbin 110A is A coil ring (not shown) having the coil spring 110A is attached, inserted, and fixed adjacent to the outer peripheral surface of the bobbin 110A. , contacted, coupled, fixed, temporarily fixed, supported or arranged, and the first coil 120 is mounted on the coil ring. It can also be attached, inserted, fixed, contacted, joined, secured, temporarily secured, supported or positioned.

[0153] The first coil 120 is attached or inserted into the outer circumferential surface of the bobbin 110A or the coil fixing groove 116. A ring-shaped coil block that is fixed, contacted, joined, secured, temporarily fixed, supported or placed. However, the present invention is not limited to this, and the first coil 120 can be directly connected to the bobbin 110A. The coil may be wound on the outer circumferential surface of the coil or on the coil anchoring groove 116. When the coil 120 is attached, inserted or placed, it is attached or placed from the top or bottom of the bobbin 110A. can be inserted or placed.

[0154] According to the embodiment, the first coil 120 is formed in a substantially octagonal shape as shown in FIG. This shape corresponds to the shape of the outer peripheral surface of the bobbin 110A, and the bobbin 11 0A may also have an octagonal shape. Also, at least four sides of the first coil 120 (or At least 22 faces may be provided in a straight line, and the corners connecting these faces may be curved. In this case, the linear portion may be formed as a driving magnet. The driving coil 120 may be a surface corresponding to the first coil 120. The surface of the magnet 130 may have the same curvature as the curvature of the first coil 120. That is, if the first coil 120 is linear, the surface of the corresponding drive magnet 130 is also linear. If the first coil 120 is curved, the corresponding drive magnet The surfaces of 130 can be curved and can also have the same curvature. Even if the first coil 120 is curved, the surface of the corresponding drive magnet 130 is linear. It can be either or vice versa.

[0155] The first coil 120 moves the bobbin 110A in the optical axis direction to perform an autofocus function. When a current is supplied, it interacts electromagnetically with the drive magnet 130. An electromagnetic force can be generated, and the generated electromagnetic force can move the bobbin 110A. As mentioned above, this is possible.

[0156] Meanwhile, the first coil 120 may be configured to correspond to the driving magnet 130. As shown in the figure, the drive magnet 130 is made of a single body and the first coil 12 If all the surfaces facing the first coil 120 have the same polarity, the first coil 120 will also be driven. The surface of the magnet 130 and the corresponding surface may be configured to have the same polarity. On the other hand, although not shown, the driving magnet 130 is divided into two by a plane perpendicular to the optical axis. If the surface facing the first coil 120 is divided into two or more parts, the first coil 1 The magnet 130 may be divided into a number of parts corresponding to the number of divided magnets 130. It is Noh.

[0157] Meanwhile, the lens driving device 2000 may further include a sensing magnet 182A. The sensing magnet 182A is attached, inserted, fixed, contacted, and coupled to the bobbin 110A. , fixed, temporarily fixed, supported or positioned. 182A has the same displacement as the bobbin 110A when the bobbin 110A moves in the first direction. The sensing magnet 182A can move in the first direction. The upper side of the bobbin 110A is the north pole, and the lower side of the bobbin 110A is the north pole. However, this is not a limitation. The opposite configuration is also possible.

[0158] The sensing magnet 182A is divided into two poles by a plane perpendicular to the optical axis. The bipolar magnetized magnet can be realized as shown in FIG. This is described in more detail below in Figures 37b and 43a and 43b.

[0159] As shown in FIGS. 15 to 18, the bobbin 110A has a sensor on the outer circumferential surface of the bobbin 110A. The magnet 182 may further include a receiving groove 117 for receiving the magnet 182A.

[0160] The receiving groove 117 extends from the outer surface of the bobbin 110A to a predetermined depth in the inward direction of the bobbin 110A. Specifically, the receiving groove 117 may be formed such that at least a portion of the receiving groove 117 The above is formed on one side of the bobbin 110A so as to be positioned inside the first coil 120. This can be done.

[0161] In addition, at least a part of the accommodation groove 117 is closer to the bobbin 110 than the coil fixing groove 116. A can be formed to be recessed to a predetermined depth inward. 17 is formed inward of the bobbin 110A, thereby forming the sensing magnet 182A can be housed inside the bobbin 110A, thereby forming the sensing magnet 182 There is no need to secure additional installation space for A, improving the space efficiency of the bobbin 110A. It can be raised.

[0162] In particular, the receiving groove 117 is located at a position corresponding to the position of the displacement sensing portion 180 of the housing member 140. Alternatively, it may be disposed at a position opposite to the displacement sensing unit 180. The sensing unit 180 and the sensing magnet 182A may be aligned on the same axis.

[0163] The distance (d) between the sensing magnet 182A and the displacement sensing unit 180 is 0 and the distance between the first coil 120 and the displacement sensing unit 180. Therefore, the accuracy of magnetic force detection of the displacement sensing unit 180 can be improved.

[0164] More specifically, as illustrated in FIGS. 15 to 18, the receiving groove 117 is The inner surface on which one side of the mat 182A is supported and the adhesive is injected from the inner surface. It may include an adhesive groove 117b recessed further inward by a depth.

[0165] The inner surface of the accommodation groove 117 is a surface located inward toward the center of the bobbin 110A. When the sensing magnet 182A has a rectangular parallelepiped shape, the sensing magnet 18 The larger surface of 2A is the surface to be contacted or fixed.

[0166] The adhesive groove 117b of the accommodation groove 117 is formed by extending a part of the inner surface of the accommodation groove 117 inward toward the center of the bobbin 110A. The adhesive groove 117b may be a groove formed deeper in the sensing direction. One surface of the magnet 182A is attached, inserted, fixed, contacted, joined, fixed, temporarily fixed, supported or arranged. The inner surface of the bobbin 110A can be formed.

[0167] As another embodiment, one surface of the sensing magnet 182A in the receiving groove 117 (i.e., From the inner surface on which the first coil 120 is provided (i.e., the wide surface) to the outer surface (i.e., , the surface of the coil fixing groove 116) is less than the thickness of the sensing magnet 182A. Therefore, the sensing magnet 182A can be The first coil 120 is fixed in the receiving groove 117 by the inward pressure of the first coil 120 due to the winding. Yes, you can. In this case, you don't need to use adhesive.

[0168] As an additional embodiment, not shown in the drawings, the bobbin 110A may have a receiving groove 117 formed therein. On the outer peripheral surface opposite to the outer peripheral surface formed on the bobbin 110A, a receiving groove is formed with the center of the bobbin 110A as a reference. An additional receiving groove 117 is formed on the outer peripheral surface of the bobbin 110A at a position symmetrical to the additional receiving groove 117. The vehicle may further include a weight balancing member accommodated in the accommodation groove 117.

[0169] According to an embodiment, the sensing magnet 182A can be omitted. The driving magnet 130 can also be used in place of the sensing magnet 182A.

[0170] As described above, the embodiment uses the results sensed by the displacement sensing unit 180 to determine the position of the lens. The amount of displacement in the optical axis direction is fed back to readjust the position of the lens in the optical axis direction. This can shorten the lens focus alignment time.

[0171] In addition, in the embodiment, the bobbin 110A, which is a moving part (or a moving body), is attached, fixed, contacted, and fixed. The sensing magnet 182A and the fixed part (or The housing member 140 is a fixed body, and is attached, fixed, contacted, fixed, temporarily fixed, connected, supported or can minimize the distance between the displacement sensing units 180, and thus the optical axis of the lens Since the amount of directional displacement can be sensed more accurately, the lens can be adjusted more precisely depending on the focal length of the lens. can be accurately positioned.

[0172] In addition, in this embodiment, the sensing magnet 182A is attached and fixed inside the bobbin 110A. , contact, fix, temporarily fix, connect, support or position the displacement sensing unit 180 to the housing member 1 By attaching, fixing, contacting, fixing, temporarily fixing, connecting, supporting or arranging inside 40, At least one attachment for mounting the sensing magnet 182A or the displacement sensing unit 180 This improves the space efficiency of the camera module (especially the bobbin) by eliminating the need for additional space. It can be done.

[0173] Third Example FIG. 19 is a schematic perspective view of a lens driving device 3000 according to the third embodiment, and FIG. 20 is a perspective view of the lens driving device 3000 according to the third embodiment. 21 is a schematic exploded perspective view of the lens driving device 3000 shown in FIG. 19; 2 is a schematic perspective view of the lens driving device 3000 with the cover can 102 removed. 2 is a schematic plan view of FIG. 21, and FIG. 23 is a drive magnet 130 according to still another embodiment. 1 is a schematic perspective view of a housing member (or housing) 140 and a displacement sensing unit 180. 24 shows the drive magnet 180, the housing member 140, and the 25 is a schematic perspective view of a drive magnet according to yet another embodiment. 130, a schematic bottom perspective view of the housing member 140 and the first circuit board 170B, FIG. 1 shows a drive magnet 130, a housing member 140, and a first circuit board according to another embodiment of the present invention. 27 is a schematic exploded perspective view of the upper spring 170B and the displacement sensing unit 180 according to another embodiment. FIG. 28 is a schematic plan view of a lower elastic member 160b according to another embodiment. FIG.

[0174] The lens driving device 3000 according to the third embodiment is the same as the lens driving device 2000 according to the second embodiment. It is a device that has an autofocusing function similar to the above.

[0175] As shown in FIGS. 19 to 22, the lens driving device 3000 according to the third embodiment includes a cover. Member 102, bobbin 110B, first coil 120, drive magnet 130, housing member 140, upper elastic member 150B, lower elastic member 160B, first circuit board (or printed circuit board) The displacement amount of the optical axis (i.e., the first direction) of the bobbin 110B is determined. The sensing unit may include a base 190 and a sensing unit for sensing displacement. The sensor 180 may include a sensing unit (or a position sensor) 180 and a sensing magnet 182B. Here, the cover member 102, the bobbin 110B, the first coil 120, the driving magnet 130, a housing member 140, an upper elastic member 150B, a lower elastic member 160B, 1 Circuit board 170B, displacement sensing unit 180, sensing magnet 182B and base 19 0 is the cover can 102, the bobbin 110A, and the lens driving device 2000 according to the second embodiment. 1. Coil 120, drive magnet 130, housing member 140, upper elastic member 150 A, lower elastic member 160A, first circuit board 170A, displacement sensing unit 180, sensing magnet They correspond to the net 182B and the base 190, respectively, and have the same function, so they are used in the same part. The same reference numerals are used for the corresponding components, and duplicated explanations will be omitted, with only the differences being explained.

[0176] As can be seen from a comparison of FIG. 13 and FIG. 27, the second passage formed in the inner frame 151 Except for the number of holes 151a, the upper elastic member 150B is the same as the upper elastic member 150A. It is one.

[0177] In the case of the lower elastic member 160A shown in FIG. 14, the first and second electrically separated elastic members are 2 The inner frame 161 of the lower elastic members 160a and 160b is an electrically insulating member 1 Alternatively, the first and second lower elastic members 160a, 160b are connected to each other by a 60b can be spatially separated from each other, member 165 can be omitted. Therefore, the materials of the first and second lower elastic members 160a and 160b are conductive. In the case of a conductive material, the first and second lower elastic members 160a and 160b are electrically isolated from each other. On the other hand, in the case of the lower elastic member 160b shown in FIG. The inner frames 161 of the first and second lower elastic members 160a and 160b are separated from each other. Except for this, the lower elastic member 160b is identical to the lower elastic member 160A.

[0178] 9 and 21, the position and interconnection of the pins 172 are as follows: Except for the differences, first circuit board 170B is identical to first circuit board 170A, and The position and connection form of the pin 172 are not limited to those shown in FIGS. Unlike what is shown, the location and connection of the pins 172 can vary.

[0179] The sensing magnet 182A shown in Figure 17 has a structure divided into two parts, upper and lower. On the other hand, the sensing magnet 182B shown in FIG. 20 has an integrated structure. Except for this, the sensing magnet 182B is identical to the sensing magnet 182A. do.

[0180] FIG. 29 is a schematic perspective view of a bobbin 110B according to yet another embodiment, and FIG. 30 is a schematic perspective view of a bobbin 110B according to yet another embodiment. 1B is a schematic bottom perspective view of the bobbin 110B and sensing magnet 182B according to the embodiment. 31 shows a bobbin 110B, a first coil 120 and a sensing material according to yet another embodiment. 32 is a schematic exploded perspective view of the bobbin 110B and the sensing magnet 182B. 33 is a partially enlarged perspective view of the bobbin 110B and the sensing magnet 182B after the bobbin 110B and the sensing magnet 182B are connected. FIG. 34 is a partially enlarged bottom view of the bobbin 110B according to the embodiment after the net 182B is bonded. FIG. 35 is a partially enlarged perspective view illustrating the receiving groove 117 of the bobbin according to still another embodiment. 1 is a schematic vertical cross-sectional view of the first coil 120 and the sensing magnet 182B. be.

[0181] As can be seen by comparing Figures 15 and 16 with Figures 29 and 30, the shape of a part of the superstructure Except for the difference in the bobbin 110B, the bobbin 110B is identical to the bobbin 110A. The above description of a lens barrel (not shown) being coupled to bobbin 110A is in accordance with the present invention. This can also be applied to the case where a barrel (not shown) is coupled to the bobbin 110B.

[0182] 31 to 35 explain in more detail the receiving groove 117 shown in FIGS. 15 to 18. do.

[0183] The receiving groove 117 will be described in more detail below with reference to FIGS. 31 to 35. In this regard, the above description of the receiving groove 117 and the adhesive groove 117b shown in FIGS. This can also be applied to Figures 31 to 35, so duplicated explanations will be omitted. 1 to 35 will mainly explain the bobbin 110B, but the following explanation regarding FIGS. 31 and 35 will be It goes without saying that the description can also be applied to bobbin 110A.

[0184] The receiving groove 117 is connected to either the lower surface or the upper surface of the bobbin 110B. For example, as shown in FIG. 35, the bobbin 110B may include an opening 119 for receiving the wire. A part of the surface is open to form an opening 119, and the opening 119 forms the entrance of the receiving groove 117. The sensing magnet 182B can be inserted, placed, or fixed through the opening 119. The sensing magnet 182B can be separated through the opening 119. It is also possible.

[0185] The adhesive groove 117b is preferably formed so that the opening 119 is in contact with one side of the sensing magnet 182B. The surface may be formed up to the inner surface of the bobbin 110B to be contacted, fixed, or placed. .

[0186] As shown in FIG. 35, the receiving groove 117 may further include a first additional groove 117c. The first additional groove 117c is a groove in which the rear surface of the sensing magnet 182B comes into contact with, is fixed to, or is disposed. The groove 117b is recessed deeper than the inner surface of the bobbin 110B and extends from the adhesive groove 117b. The combined length of the adhesive groove 117b and the first additional groove 117c is equal to the thickness of the bobbin 110B from top to bottom. The length of the sensing magnet 182B in the vertical direction (for example, the z-axis direction) is longer than that of the sensing magnet 182B. By forming the adhesive groove 117c, the adhesive flows through the opening 119 into the adhesive groove 117b. When the adhesive is injected, the adhesive is injected from the first additional groove 117c so as to fill the inside of the adhesive groove 117b. Therefore, the adhesive may overflow from the adhesive groove 117b and contact the sensing The magnet 182B flows along the gap between the magnet 182B and the receiving groove 117 to the first coil 120. Therefore, during the coupling process of the sensing magnet 182B, The defect rate of the lens driving devices 2000 and 3000 can be reduced.

[0187] In addition, the receiving groove 117 may further include a second additional groove 117a. 7a is formed to a predetermined depth inward from the opening 119 toward the center of the bobbin 110B, The second additional groove 117a may be arranged to extend from the adhesive groove 117b. The opening 119 is formed deeper inward from the inner surface toward the center of the bobbin 110B. The second additional groove 117a is connected to the adhesive groove 117b. That is, as described above, the second additional groove 117a is an extension of the adhesive groove 117b. In this way, by arranging the second additional groove 117a, the adhesive can be easily applied to the second additional groove 117a. The adhesive can be injected into the adhesive groove 117b through the opening 119. The wire 110B may overflow and stick to other components of the bobbin 110B, such as the first coil 120. Therefore, the lens during the coupling process of the sensing magnet 182B can be prevented. The defect rate of the lens drive devices 2000 and 3000 can be reduced.

[0188] In addition, as a modified embodiment, the second additional groove 117a is provided for the bobbin alone without the adhesive groove 117b. In this case, adhesive can be injected into the second additional groove 117a. The bobbin 110B and the sensing magnet 182B can be coupled and fixed.

[0189] In addition, at least one of the first additional groove 117c and the second additional groove 117a is an adhesive groove 117. That is, only the first additional groove 117c can be arranged to extend from the adhesive groove 117b. Alternatively, only the second additional groove 117a extends from the adhesive groove 117b. In this way, the receiving groove 117 of the bobbin 110B can be formed by stretching. The groove 117b, the first additional groove 117c, or the second additional groove 117a may be included. can.

[0190] As an additional embodiment, not shown, the bobbin 110B may have a receiving groove 117 formed therein. The outer peripheral surface facing the bobbin 110B is formed with a receiving groove 117 with the center of the bobbin 110B as a reference. The additional receiving groove 117 formed at the symmetrical position and the weight balance received in the additional receiving groove 117 The device may further include a member.

[0191] That is, the additional receiving groove 117 is formed on the outer peripheral surface opposite to the outer peripheral surface on which the receiving groove 117 is formed. 110B is placed at a position symmetrical to the receiving groove 117 on a straight line with the center of the bobbin 110B as a reference. The weight balancing member can be formed in the inner direction of the bobbin 110B to a depth of . The magnetic sensing member (e.g., a sensing magnet) is fixed and coupled in the additional receiving groove 117. In this way, the additional receiving groove 117 and the net 182B can have the same weight. By providing the weight balancing member, the accommodation groove 117 and the sensing magnet 182B This allows compensation for the horizontal weight imbalance of the bobbin 110B due to the formation.

[0192] The additional receiving groove 117 may be an adhesive groove 117b, a first additional groove 117c, or a second additional groove 117d. It may include at least one of 17a.

[0193] According to the lens driving devices 2000 and 3000 of the second and third embodiments described above, The amount of lens displacement along the optical axis is fed back to readjust the lens position along the optical axis. This reduces the time required for lens focus alignment.

[0194] Furthermore, according to the lens driving devices 2000 and 3000 of the second and third embodiments described above, , which are attached to, inserted into, fixed in, contacted with, connected to, fixed in, or temporarily fixed to the bobbins 110A and 110B, which are movable bodies. The sensing magnets 182A and 182B are fixed, supported or arranged, and the housing is a fixed body. Therefore, the distance between the displacement sensing unit 180 and the support member 140 can be minimized. Therefore, the amount of displacement of the lens along the optical axis can be detected more accurately, and the lens can be It can be positioned accurately by adjusting the focal length of the lens.

[0195] Furthermore, the lens driving devices 2000 and 3000 according to the second and third embodiments have the following advantages: The magnets 182A and 182B are attached, inserted, and fixed inside the bobbins 110A and 110B. The displacement sensing unit 180 is attached to the housing member 1 by attaching, contacting, joining, fixing, temporarily fixing, supporting or arranging. 40, no additional space is required for mounting the sensing unit. Therefore, the space efficiency of the camera module (particularly the bobbin) can be improved.

[0196] In addition, the lens is coupled to the lens driving device 2000, 3000 of the second and third embodiments, and The image sensor and the second circuit board (or printed circuit board) on which the image sensor is mounted are The camera module may further include a lens driving device 2000. , the 3000 base 190 and the second circuit where the image sensor is located can be combined. Cut.

[0197] Fourth Example The configuration and operation of the lens driving devices 200A to 200F according to the fourth embodiment will be described below. The following description will be given based on the accompanying drawings.

[0198] FIG. 36 is a schematic cross-sectional view of a lens driving device 200A according to Example 4-1.

[0199] The lens driving device 200A shown in FIG. 36 includes a fixed part 210, a moving part 220, a lower part and an upper part. Partial springs 230, 240, bipolar magnetized magnet (or two-pole magnetized magnet) 250 and a position sensor 260 (or a driver including a position detection or position detection sensor). It can be done.

[0200] The fixed portion 210 may include a bottom portion 212, a side portion 214, and a top portion 216. When the moving part 220 of the driving device 200A moves in one direction of the optical axis, the lower part 2 of the fixed part 210 12 can support the moving part 220 in an initial rest state, or can be mounted on top and / or The lower springs 240 and 230 separate the lower portion 212 of the fixed portion 210 by a certain distance. The moving part 220 may be supported in an initial stationary state while standing.

[0201] The side portion 214 of the fixing portion 210 supports the lower spring 230 and the upper spring 240. The lower part 212 and / or the upper part 216 of the fixed part 210 may serve as a support. It may also support the lower and / or upper springs 230, 240. For example, a fixed part 210 is the first, second and third lens driving devices 1000-1, 2000, 3000 mentioned above. The housing members 40 and 140 support the drive magnets 41 and 130. It can also be used as a yoke, and can also be used as a cover can 60, 102. It can also be equivalent to base 20 or 190.

[0202] The moving part 220 may be equipped with at least one lens (not shown). For example, the moving unit 220 is the first, second and third lens driving devices 1000-1, 2000-2, 2000-3, 2000-4, 2000-5, 2000-6, 2000-7, 2000-8, 2000-9, 2000-10, 2000-11, 2000-12, 2000-13, 2000-14, 2000-15, 2000-16, 2000-17, 2000-18, 2000-19, 2000-20, 2000-21, 2000-22, 2000-23, 2000-24, 2000-25, 2000-26, 2000-27, , 3000, which may correspond to bobbins 30, 110A, 110B, is not limited to this.

[0203] Although not shown, the lens driving device 200A includes a first coil and a driving magnet. The lens driving device 200A may further include a first coil and a driving master. The magnets are opposed to each other so as to move the moving part 220 in the z-axis direction, which is the optical axis direction of the lens. They are arranged facing each other and interact.

[0204] For example, the first coil and the driving magnet are the same as those of the first, second and third lens driving devices. The first coils 31, 120 and the drive magnets 4 of the units 1000-1, 2000, and 3000 1 and 130, respectively, but the embodiment is not limited thereto.

[0205] In the case of FIG. 36, the moving part 220 moves in one direction of the optical axis (i.e., in the +z-axis direction). However, as will be described below, other embodiments of the moving part 220 may It can move in both directions of the optical axis (ie, in the +z or -z direction).

[0206] On the other hand, the position sensor 260 detects a first displacement value in the z-axis direction, which is the optical axis direction of the moving part 220. The position sensor 260 senses the magnetic field of the bipolar magnetized magnet 250. It is possible to output a voltage having a level proportional to the strength of the sensed magnetic field. Cut.

[0207] The position sensor 260 is configured to sense magnetic fields of linearly varying strength. The magnetized magnet 250 is aligned with the position sensor 260 in the y-axis direction, which is the magnetization direction perpendicular to the optical axis direction. and can be arranged opposite each other.

[0208] For example, the position sensor 260 may be connected to the first, second and third lens driving devices 1000- 1, 2000, 3000 displacement sensing units 82, 180, and bipolar magnetized magnet 250 The sensors of the first, second and third lens driving devices 1000-1, 2000 and 3000 are as described above. The magnets 70, 182A, and 182B may correspond to the single magnets 70, 182A, and 182B. The types of bipolar magnetized magnet 250 are ferrite, aluminum, They can be broadly classified into Alnico, rare earth magnets, etc. depending on the form of the magnetic circuit. They can be classified into P-type and F-type. The type of the bipolar magnetized magnet 250 is not limited to this.

[0209] According to the embodiment, the bipolar magnetized magnet 250 has a side facing the position sensor 260. Here, the side surface may include a first side surface 252 and a second side surface 254. The first side surface 252 has a first polarity, and the second side surface 254 has a second polarity opposite to the first polarity. The second side surface 254 is a surface having two polarities. The first side surface 252 may be spaced apart or in contact with the first side surface 252. The first length (L1) of the side surface 252 in the optical axis direction is equal to the second length (L2) of the second side surface 254 in the optical axis direction. ) or may be greater than the second length (L2) of the second side surface 254 in the optical axis direction. In addition, in the bipolar magnetized magnet 250, the first magnetic flux of the first side surface 252 having the first polarity The density can be greater than a second magnetic flux density on the second side 254 having a second polarity.

[0210] The first polarity can be a south pole and the second polarity can be a north pole, or conversely, the first polarity can be a north pole, The second polarity can also be a south pole.

[0211] 37a and 37b show an embodiment 250A of the bipolar magnetized magnet 250 shown in FIG. 250B are cross-sectional views, respectively.

[0212] Referring to FIG. 37a, the bipolar magnetized magnet 250A is a first and second sensing magnet. The insulating film 250A may further include a non-magnetic partition wall 250A-3. Referring to FIG. 37b, the bipolar magnetized magnet 250B may further include first and second The second sensing magnets 250B-1 and 250B-2 may be included, and the non-magnetic material A partition wall 250B-3 may further be included.

[0213] The first and second sensing magnets 250A-1 and 250A-2 shown in FIG. 37a are mutually The first and second sensors shown in FIG. 37b can be spaced apart or placed in contact with each other. The single magnets 250B-1 and 250B-2 are also arranged to be spaced apart or in contact with each other. It is possible.

[0214] According to one embodiment, as shown in FIG. 37a, first and second sensing magnets 25 0A-1 and 250A-2 are spaced apart from each other in a direction parallel to the optical axis (i.e., the z-axis direction). They can also be placed so that they are close to each other.

[0215] Alternatively, according to another embodiment, as shown in FIG. 37b, the first and second sensing elements may be Magnets 250B-1 and 250B-2 are spaced apart or connected in the magnetization direction (i.e., the y-axis direction). It can also be arranged to

[0216] The bipolar magnetized magnet 250 shown in FIG. 36 is a magnet having the structure shown in FIG. Although the magnet is shown as a magnet, it can be replaced with a magnet having the structure shown in Figure 37b. It can also be done as follows.

[0217] The non-magnetic partition wall 250A-3 shown in FIG. 37a is a first and second sensing magnet. The non-magnetic material shown in FIG. 37b can be placed between the holes 250A-1 and 250A-2. The partition wall 250B-3 is between the first and second sensing magnets 250B-1 and 250B-2. The non-magnetic partition walls 250A-3 and 250B-3 can be arranged substantially without magnetism. It can contain a section that has almost no polarity and is filled with air. The magnetic material may be magnetic or may contain non-magnetic material.

[0218] The third length (L3) of the non-magnetic partition walls 250A-3 and 250B-3 is 5% or more or 50% of the total length (LT) of the 250A and 250B in the direction parallel to the optical axis direction It can be:

[0219] FIG. 38 is a graph for explaining the operation of the lens driving device 200A shown in FIG. The horizontal axis represents the distance traveled by the moving part 220 in the direction of the optical axis or the z-axis direction, which is parallel to the optical axis direction. The vertical axis can represent the distance, and the vertical axis can represent the magnetic field sensed by the position sensor 260. The output voltage from the position sensor 260 can also be displayed. 0 can output a voltage having a level proportional to the strength of the magnetic field.

[0220] As shown in FIG. 36, in the initial state before the lens is moved in the optical axis direction, that is, the lens In the initial state where the moving part 220 to which the sensor is attached is fixed and does not move, The inter-plane height (z=zh) extends from the upper end 251 of the first side surface 252 in the y-axis direction, which is the magnetization direction. A point located on or higher than the imaginary horizontal plane (HS1) In this case, referring to FIG. 38, the position sensor 260 can detect the The strength of the magnetic field that can be measured can be close to, but not equal to, '0' (BO). In this initial state, the moving unit 220, which is equipped with a lens and can move in a single direction, the +z axis direction, is Located at the lowest.

[0221] FIG. 39 shows a state in which the lens driving device 200A shown in FIG. 36 has moved in the optical axis direction.

[0222] FIG. 40 shows the relationship between the current supplied to the first coil in the lens driving device according to the fourth embodiment. 1 is a graph showing the displacement of the moving part 220, in which the horizontal axis represents the current supplied to the first coil and the vertical axis represents the The axis indicates displacement.

[0223] Referring to the aforementioned drawings, by increasing the intensity of the current supplied to the first coil, As shown in FIG. 39, the moving part 220 moves up and down in the +z-axis direction up to a distance (z=z1). In this case, referring to FIG. 38, the magnetic field that can be sensed by the position sensor 260 is The strength can be B1.

[0224] Thereafter, the intensity of the current provided to the first coil is reduced or the current supply to the first coil is turned off. When disconnecting, the moving part 220 can be lowered to the initial position as shown in FIG. In order for the moving part 220 to move up and down from the position shown in FIG. 36 to the position shown in FIG. The electric force of the moving part 220 is applied to the lower and upper springs. The spring force (mechanical force) must be greater than 230 or 240. It must be.

[0225] 39. Also, the moving part 220 moves from the highest point as shown in FIG. 39 to the point as shown in FIG. To return to the original initial position, the electrical force must be applied to the springs 230 and 240. That is, after the moving part 220 rises in the +z-axis direction, , can return to its original position by the restoring force of the lower and upper springs 230, 240. .

[0226] Here, the lower spring 230 includes first and second lower springs 232, 234, The upper spring 240 may include first and second upper springs 242, 244. Here, the lower spring 230 is divided into two parts, the first and second lower springs 232 and 234. Although shown as separate, embodiments are not limited thereto. The upper and second lower springs 232, 234 may be integrally formed. The spring 240 is separated into two upper springs, first and second springs 242 and 244. Although illustrated as such, the embodiment is not limited thereto. The springs 242, 244 may also be integrally formed.

[0227] For example, the lower spring 230 is the same as that of the first, second and third lens driving devices 1000. -1, 2000, 3000 correspond to the lower elastic members 52, 160A, 160B, and the upper spring The ring 240 is connected to the first, second and third lens driving devices 1000-1, 2000-3. 000, the upper elastic members 51, 150A, 150B, but the embodiment This is not limited to the above.

[0228] As shown in FIGS. 36 and 39, the intermediate height (z=zh) of the position sensor 260 is When the first and second sides 252 and 254 are biased to one side, the position sensor 260 detects the bias. The magnetic field generated has only one polarity, either the first or second polarity. When the strength of the magnetic field of the position sensor 260 changes linearly, the position sensor 260 detects the first or second magnetic field that changes linearly. 38, the first moving part 220 is configured as shown in FIG. While moving from the lowest point as shown in 36 to the highest point as shown in 39, It can be seen that the change in magnetic field strength sensed by the position sensor 260 is linear.

[0229] 38 and 40, the moving unit 22 of the lens driving device 200A shown in FIG. It can be seen that the maximum displacement (D1) that 0 can move is z1.

[0230] FIG. 41 is a cross-sectional view of a lens driving device 200B according to the 4-2 embodiment.

[0231] Unlike the lens driving device 200A shown in FIG. 36, the lens driving device 20 shown in FIG. In the case of 0B, in the initial state before the lens is moved in the optical axis direction, the intermediate height of the position sensor 260 The height (z=zh) is the y-axis direction, which is the magnetization direction, and the first point on the first side surface 252 can be viewed in that direction. Here, the first point is a point between the upper end 251 and the lower end of the first side surface 252, for example, It can be at the mid-height of the first side 252 .

[0232] In the state before the moving part 220 moves, the polarity of the lens driving device 200B shown in FIG. The magnetic magnet 250 is the same as the bipolar magnetized magnet 25 of the lens driving device 200A shown in FIG. It can be positioned a certain distance (z2-zh) higher than 0. In this case, see Figure 38. Then, the minimum value of the magnetic field having the first polarity sensed by the position sensor 260 is greater than B0. It can be a good B2.

[0233] In the lens driving device 200B shown in FIG. 41, applying a current to the first coil Therefore, the moving part 220 has the highest height (z 1). At this time, the maximum height of the moving part 220 is the height of the lower spring. The elastic modulus of the spring 230 and upper spring 240 can also be adjusted to change the elastic modulus.

[0234] 36 and 39. As with the operating device 200A, the strength of the magnetic field sensed by the position sensor 260 varies from B2 to It can be seen that the change is linear up to B1.

[0235] Referring to FIG. 40, the moving part 220 of the lens driving device 200B shown in FIG. It can be seen that the maximum possible displacement (D1) is z1-z2.

[0236] FIG. 42 is a cross-sectional view of a lens driving device 200C according to Example 4-3.

[0237] In the case of the lens driving device 200A, 200B shown in FIG. 36, FIG. 39 or FIG. 41, the first side The surface 252 is located on the second side surface 254. On the other hand, the lens driving device 200C shown in FIG. In this case, the second side 254 can be located on the first side 252. The long second side surface 252 of the magnetized magnet 250 is disposed below the short first side surface 254. 42 is the same as that shown in FIG. 36 or FIG. 41 except that Since the lens driving devices 200A and 200B are the same as those described above, the same reference numerals will be used and the same explanation will be omitted. The explanation of the parts that are omitted here.

[0238] 43a and 43b show an embodiment 250C of the bipolar magnetized magnet 250 shown in FIG. The cross-sectional views according to 250D are shown.

[0239] Referring to FIG. 43a, the bipolar magnetized magnet 250C is a first and second sensing magnet. The magnetic separator 250C-1 and the magnetic separator 250C-2 may further include a non-magnetic partition wall 250C-3. Referring to FIG. 43b, the bipolar magnetized magnet 250D has first and second cells. Including sizing magnets 250D-1 and 250D-2, or non-magnetic partition wall 250D It may further include -3.

[0240] The first and second sensing magnets 250C-1 and 250C-2 shown in FIG. 43a are mutually The first and second sensors shown in FIG. 43b can be spaced apart or placed in contact with each other. The single magnets 250D-1 and 250D-2 are arranged so that they are spaced apart or in contact with each other. It is possible.

[0241] According to one embodiment, as shown in FIG. 43a, first and second sensing magnets 25 0C-1 and 250C-2 are spaced apart from each other in a direction parallel to the optical axis (i.e., the z-axis direction). They can also be placed so that they are close to each other.

[0242] Alternatively, according to another embodiment, as shown in FIG. 43b, the first and second sensing elements may be Magnets 250D-1 and 250D-2 are spaced apart or connected in the magnetization direction (i.e., the y-axis direction). It can also be arranged to

[0243] The bipolar magnetized magnet 250 shown in FIG. 42 is a magnet having the structure shown in FIG. Although the magnet is shown as a magnet, it can be replaced with a magnet having the structure shown in Figure 43b. It can also be done as follows.

[0244] Also, as shown in FIG. 43a, the non-magnetic partition wall 250C-3 is The magnets 250C-1 and 250C-2 may be disposed between the magnets 250C-1 and 250C-2, as shown in FIG. Thus, the non-magnetic partition wall 250D-3 is provided between the first and second sensing magnets 250D-1, The non-magnetic partition walls 250C-3 and 250D-3 can be disposed between the non-magnetic partition walls 250C-3 and 250D-3. is a substantially non-magnetic portion and may include a section with little polarity, It may also be air-filled or contain non-magnetic materials.

[0245] The third length (L3) of the non-magnetic partition walls 250C-3 and 250C-3 is 5% or more or 50% of the total length (LT) in the direction parallel to the optical axis direction of 250C, 250C It can be:

[0246] 38 and 42, in the initial state before the lens is moved in the optical axis direction, the position sensor The intermediate height (z=zh) of the sensor 260 is the non-magnetic partition wall 250C in the y-axis direction, which is the magnetization direction. -3 (or the space between the first side 252 and the second side 254) This is the magnetization direction from the middle height (z=zh) of the position sensor 260. The upper end 253 of the first side surface 252 is located on a virtual horizontal plane (HS2) extending in the y-axis direction. Alternatively, the mid-height (z=zh) of the position sensor 260 can be expressed as may be located at a point between the top end 253 and the second side 254.

[0247] In this way, when the moving part 220 is stopped and does not move, the two electrodes are attached as shown in FIG. When the magnetic magnet 250 and the position sensor 260 are arranged, the position sensor 260 detects The strength of the magnetic field having the first polarity to be applied may be '0'.

[0248] As shown in Figures 37a and 43a, the first side 252 is connected to the position sensor 26. 0 corresponds to the side of the first sensing magnets 250A-1 and 250C-1 facing each other. Also, as shown in Figures 37a and 43a, the second side surface 254 The second sensing magnets 250A-2 and 250C- It can correspond to two aspects.

[0249] Alternatively, as shown in Figure 37b or Figure 43b, the first and second sides 252 , 254 are first sensing magnets 250B-1, 250B-2 facing the position sensor 260. It can correspond to the side of 50D-1.

[0250] FIG. 44 is a cross-sectional view of a lens driving device 200D according to the 4-4 embodiment.

[0251] Referring to FIG. 44, in the initial state before the lens is moved in the optical axis direction, the position sensor 26 The intermediate height (z=zh) of 0 is the first point of the first side surface 252 viewed in the y-axis direction, which is the magnetization direction. Here, the first point is a point between the upper end and the lower end of the first side surface 252, for example, For example, it can be at the mid-height of the first side surface 252 .

[0252] In the state before the moving part 220 moves, the polarity of the lens driving device 200D shown in FIG. The magnetic magnet 250 is the same as the bipolar magnetized magnet 25 of the lens driving device 200C shown in FIG. It can be positioned higher than 0 by a distance (z2-zh). In this case, see Figure 38. and the minimum strength of the magnetic field having the first polarity that can be sensed by the position sensor 260 is B2. can be done.

[0253] By applying a current to the first coil of the lens driving device 200D shown in FIG. The moving part 220 can be raised to the maximum height (z1) like the lens driving device 200A. At this time, the maximum lift height of the moving part 220 can be adjusted by a mechanical stopper. Alternatively, the maximum lift height of the moving part 220 is determined by the lower spring 230 and the upper spring 24. The elastic modulus of 0 can be adjusted to change this.

[0254] 44, the lens driving device 200D shown in FIG. 44 also has the same structure as the lens driving device 200 shown in FIG. Similar to the operating device 200A, the strength of the magnetic field having the first polarity sensed by the position sensor 260 It can be seen that the change in is linear from B2 to B1.

[0255] Referring to FIG. 40, the moving part 220 of the lens driving device 200D shown in FIG. 44 is movable. It can be seen that the maximum possible displacement (D1) is z1-z2.

[0256] The lens driving device 200A shown in FIGS. 36, 39, 41, 42, and 44, In 200B, 200C, and 200D, the moving part 220 moves in one direction of the optical axis, i.e., the initial position. However, the embodiment is not limited to this. That is, according to another embodiment, the lens driving device is configured such that, when a current is applied to the first coil, Therefore, it is possible to move in both directions of the optical axis, that is, from the initial position along the +z axis or the -z axis. The structure and operation of the lens driving device according to this embodiment will be described in detail below. It seems.

[0257] FIG. 45 is a cross-sectional view of a lens driving device 200E according to the 4-5th embodiment.

[0258] Unlike the lens driving devices 200A and 200B described above, the lens driving device shown in FIG. 200E can move from the initial position in the +z-axis direction or the -z-axis direction. The moving part 220 is suspended in the air by the lower and upper springs 230, 240. Except for this, the components of the lens driving device 200E shown in FIG. Since the components of the lens driving devices 200A and 200B are the same as those of the lens driving devices 200A and 200B, Duplicate detailed descriptions of the components of will be omitted.

[0259] Referring to FIG. 45, in the initial state before the lens is moved in the optical axis direction, that is, in the moving unit 2 When the sensor 20 is stationary and not moving, the intermediate height (z=zh) of the position sensor 260 is magnetized. In this direction, a first point on the first side 252 can be viewed. 52, for example, at the mid-height of the first side surface 252. do.

[0260] FIG. 46 is a cross-sectional view of a lens driving device 200F according to the fourth to sixth embodiments.

[0261] Unlike the lens driving devices 200C and 200D shown in FIGS. 42 and 44, The lens driving device 200F shown in FIG. 1 can move in the +z-axis direction or the −z-axis direction. Therefore, the lower and upper springs 230, 240 cause the moving part 220 to float in the air. Apart from this, the lens driving device 200F shown in FIG. The elements are the same as those of the lens driving devices 200C and 200D described above. , redundant detailed descriptions of each component will be omitted.

[0262] Referring to FIG. 46, in the initial state before the lens is moved in the optical axis direction, the position sensor 26 The intermediate height of 0 (z=zh) allows viewing of the first point on the first side surface 252 in the magnetizing direction. Here, the first point is a point between the upper end and the lower end of the first side surface 252, for example, the first side surface 2 52 intermediate heights.

[0263] In the lens driving device 200E or 200F shown in FIG. 45 or FIG. 46, the moving unit 220 The rising and falling movements of the arrows can be the same as those in FIG. 38. Therefore, please refer to FIG. 38 for the arrows in FIG. 45 and FIG. The operation of the lens driving devices 200E and 200F shown in FIG. 46 will be explained as follows. .

[0264] In the lens driving devices 200E and 200F, the initial state before the lens is moved in the optical axis direction is In other words, when the moving part 220 is not moving up or down but is at a standstill or at the initial position, the position sensor The sensor 260 and the bipolar magnetized magnet 250 are arranged as shown in FIGS. In this case, the magnetic field of the first polarity sensed by the position sensor 260 can be B3. When the unit 220 is not moving up or down and is stopped or at the initial position, the position sensor 260 detects the The initial magnetic field value is determined based on the distance between the position sensor 260 and the bipolar magnetized magnet 250. , these 260 and 250 can be changed or adjusted depending on the design values.

[0265] FIG. 47 shows the first lens driving device 200E, 200F shown in FIGS. 1 is a graph showing the displacement of the moving part 220 according to the current supplied to the coil, and the horizontal axis is the first coil. The vertical axis indicates the current supplied to the filter, and the vertical axis indicates the displacement. The left side of the horizontal axis represents the reverse current or the forward current or the reverse current. It can mean flow or current.

[0266] When the moving part 220 is in a stopped state or in the initial position without moving as shown in FIG. 45 or FIG. 46, By increasing the strength of the positive current applied to the coil 1, the moving part 220 moves in the +z-axis direction. In this case, referring to FIG. 38, the position sensor The strength of the magnetic field sensed by sensor 260 can increase from B3 to B4.

[0267] Alternatively, the moving part 220 may be in a stopped state or an initial state without moving as shown in FIG. 45 or FIG. At this position, the strength of the reverse current applied to the first coil is increased or the coil is shifted in the +z direction. After the moving part 220 moves, if the positive current supplied to the first coil is reduced, the moving part 220 moves downward. In this case, referring to FIG. 38, the magnetic field sensed by the position sensor 260 The intensity of the saturation can decrease from B3 to B5 or from B4 to B3. Cut.

[0268] In this way, the position sensor of the lens driving device 200E, 200F shown in FIG. 45 or FIG. The strength of the magnetic field having the first polarity sensed by the sensor 260 varies linearly between B5 and B4. I understand that it will work.

[0269] Referring to FIG. 47, in a situation where the moving part 200 is movable in both directions as described above, The upper displacement width (D3) and the lower displacement width (D2) of the portion 220 may be the same. The width (D3) can also be greater than the lower displacement width (D2).

[0270] When the upper displacement width (D3) is the same as the lower displacement width (D2), the lens is moved in the optical axis direction. In the initial state before the magnetization, the intermediate height (z=zh) of the position sensor 260 is the y-axis, which is the magnetization direction. However, the upper displacement (D3) is larger than the lower displacement. If the position width (D2) is larger than the initial state or initial position before moving the lens in the optical axis direction, The intermediate height (z=zh) of the position sensor 260 is the first height in the y-axis direction, which is the magnetization direction. In other words, the upper displacement (D3) is larger than the lower displacement (D4). If the upper displacement width (D3) is greater than the lower displacement width (D2), both The height of the position sensor 260 relative to the pole magnet 250 may be relatively high. .

[0271] In this case, the difference between the second point and the first point can be expressed as follows:

number

[0272] Here, H2 is the height of the second point, H1 is the height of the first point, and ΔD is the upper displacement of the moving part 220. The value obtained by subtracting the lower displacement width (D2) from the displacement width (D3), and D is the displacement width (D2) of the moving part 220. +D3).

[0273] FIG. 48 shows the movement distance of the moving part 220 in the optical axis direction, which is detected by the position sensor 260. The strength of the magnetic field (or output voltage) generated by the position sensor 260 and the bipolar magnetized magnet 250-1 , 250-2 are graphs showing the opposing forms, and the vertical axis is the strength of the magnetic field (or output voltage). The horizontal axis indicates the distance traveled by the moving unit 220 in the optical axis direction.

[0274] In the graph shown in FIG. 48, the bipolar magnetized magnet 25 facing the position sensor 260 The structure of the first and second sensing magnets 250A-1 and 250A-0 is the same as that shown in FIG. However, the first and second sensing magnets 250A shown in FIG. 37b instead of the first and second sensing magnets 250A-1 and 250A-2. 0B-1, 250B-2 or the first and second sensing magnets 250 shown in FIG. 43a C-1, 250C-2 or the first and second sensing magnets 250D shown in FIG. 43b When the position sensor 260 is disposed opposite the position sensor 250D-1 and 250D-2, the same applies to FIG. It goes without saying that all of the following explanations are applicable.

[0275] Referring to FIG. 48, as described above, the linear change detected by the position sensor 260 The magnetic field having a certain strength can be of a first polarity, e.g., a south pole magnetic field 272. The embodiment is not limited to this. That is, according to another embodiment, the position sensor 260 detects The magnetic field having a linearly varying intensity is a magnetic field 274 of a second polarity, e.g., a north pole. can be done.

[0276] The magnetic field having a linearly varying strength sensed by the position sensor 260 is not of a first polarity. In the case of a magnetic field 274 of the N pole, which is the second polarity, referring to FIG. 48, the lens is rotated in the optical axis direction. In the initial state or initial position before moving in the z-axis direction, the intermediate height (z =zh) can see a first point on the second side 254. Here, the first point is on the second side It is at a point between the upper end and the lower end of the surface 254, for example, at the mid-height of the second side surface 254. Then, when the lens is moved to the highest position in the +z-axis direction, which is the optical axis, the position sensor The middle height (z=zh) of the sensor 260 coincides with a point lower than the bottom end of the second side surface 254. It is possible.

[0277] Also, the first section BP1 where the magnetic field 272 of the south pole is linear is the first section BP2 where the magnetic field 274 of the north pole is linear. This is because the first length (L1) of the first side 252 having the S polarity is greater than the second section BP2. is longer than the second length (L2) of the second side surface 254 having N polarity. The first side 252 having a first length (L1) longer than the length (L2) has N polarity, and the first length When the second side 254 having a second length (L2) shorter than the length (L1) has an S polarity, Reference numeral 272 shown in 48 corresponds to a magnetic field of north polarity, and 274 corresponds to a magnetic field of south polarity. Although not shown, if the polarity is changed as described above, the polarity of the Y axis can be changed. The genders can be reversed.

[0278] 49a and 49b are graphs showing the displacement of the magnetic field detected by the position sensor 260 according to the strength of the magnetic field. In each graph, the horizontal axis represents the magnetic field and the vertical axis represents the displacement.

[0279] The magnetic field of the first section BP1 having a linear section larger than the second section BP2 shown in FIG. The position sensor 260 and the bipolar magnetized magnet 250 are arranged so that the position can be detected. In this case, as shown in Figure 49a, the displacement can be recognized even when the change in the sensed magnetic field is minute. However, it is possible to use a linear section that is relatively smaller than the first section BP1 shown in FIG. The position sensor 260 and the bipolar magnetization are connected to each other to sense the magnetic field of the second section BP2. When magnet 250 is placed, the perceived magnetic field changes slightly, as shown in Figure 49b. In the thin case, the degree to which minute displacements can be recognized is smaller than in the case of Figure 49a. That is, the slopes of Fig. 49a and Fig. 49b can be different from each other. As described above, the position sensor 260 senses the magnetic field of the first section BP1, which is larger than that of the second section BP2. In order to achieve this, the position sensor 260 and the bipolar magnetized magnet 250 are arranged. In this case, the displacement can be sensed with much higher resolution. The wider the shape interval, the more accurately you can check the change in displacement relative to the coded magnetic field. do.

[0280] Also, according to the embodiment, the position sensor 260 senses the linearly varying magnitude. The strength of the magnetic field can be coded using 7 to 12 bits. (not shown) includes a look-up table (not shown) and converts the displacement of the moving part 220 into a position sensor. The magnetic field can be precisely controlled by the sensor 260. The intensity-specific code values ​​can be stored by matching them with the displacement. For example, see Figure 38. The magnetic field strength from the minimum field (B0) to the maximum field (B1) is matched with the displacement (z). Therefore, the displacement of the moving part 220 can be coded with 7 to 12 bits. When you want to control a device, it searches for the corresponding code value, and the control unit matches the code value found. The moving unit 220 can be moved along the optical axis to a position where the image is to be captured. It can be located or contained within the image sensor, or the image sensor itself The first circuit board may be disposed on or included in the first circuit board.

[0281] In addition, in the lens driving devices 200A to 200F described above, the bipolar magnetized magnet 25 The length (LT) in the z-axis direction parallel to the optical axis direction of 0 is the movable width of the moving part 220, that is, For example, referring to Figs. 36 and 39, Since the maximum displacement, which is the movable width of the moving part 220, is z1, The length (LT) of 50 can be 1.5*z1 or greater.

[0282] In the lens driving devices 200A to 200F described above, the fixed portion 210 is provided with a position sensor. The sensor 260 is connected, contacted, supported, temporarily fixed, inserted or fixed, and is bipolarly magnetized to the moving part 220. For example, when the magnet 250 is connected, contacted, supported, fixed, temporarily fixed, inserted or fixed. However, the embodiment is not limited to this.

[0283] That is, according to another embodiment, the position sensor 260 is coupled to, contacts, or supports the moving part 220. The bipolar magnetized magnet 250 is connected to or contacts the fixed portion 210. In this case, the above explanations are applicable. It can be used.

[0284] FIG. 50 illustrates the change in magnetic field strength depending on the moving distance of the moving part 220 of the lens driving device of the comparative example. 1 is a graph for explaining the movement distance, and the horizontal axis indicates the magnetic field strength.

[0285] The magnet 250 is positioned close to either the first or second side surface 252, 254. If the position sensor 260 is not provided, the first and second lengths (L1, L2) in the optical axis direction are 2) are the same, the movement of the moving part 220 is detected by the position sensor 260. The change in the magnetic field can be as shown in FIG. 50. The magnetic field sensed by sensor 260 is centered on the mutual zone (MZ). In this case, the mutual zone (MZ) is a zone where the moving part 220 moves regardless of its movement. Regardless of the position, the strength of the magnetic field sensed by the position sensor 260 is fixed at '0'. Mutual Zones (MZ) like this may not be able to be processed even by software. Therefore, the position sensor 260 only senses the magnetic field strength as '0' in the mutual zone (MZ). Therefore, the moving distance of the moving part 220 moving in this section (MZ) can be accurately measured and and cannot be controlled.

[0286] However, according to the embodiment, the first length (L1) of the bipolar magnetized magnet 250 is changed to the second length ( L2), and the position sensor 260 senses a magnetic field of the first polarity whose strength changes linearly. In this way, problems similar to those in the comparative example can be prevented in advance. Therefore, the design margin and reliability of the lens driving devices 200A to 200F can be improved. can be done.

[0287] FIG. 51 shows a position sensor according to the movement of the moving part 220 in the lens driving device of the embodiment. This is a graph showing the change in magnetic field detected by the 260-260 sensor. The horizontal axis shows the distance traveled and the vertical axis shows the magnetic field. Show the place.

[0288] The third length (L3) of the non-magnetic partition walls 250A-1 and 250C-1 is set to a value corresponding to the bipolar magnetized magnet. If the total length (LT) of the net 250 is reduced to 50% or less, the mutual area is The area (MZ) can be almost completely removed. =zh) can be equal to the mid-height of the bipolar magnetized magnet 250. In this case, The change in strength of the magnetic field 282 of one polarity and the change in strength of the magnetic field 284 of the second polarity change almost linearly. Therefore, the position sensor 260 can be moved linearly according to the movement of the moving part 220. Both a magnetic field 282 of a first polarity and a magnetic field 284 of a second polarity of varying strength can be sensed. Therefore, the intensity varies linearly with only one polarity between the first and second polarities. The magnetic field can have a relatively higher resolution than when the position sensor 260 senses the magnetic field. .

[0289] The third length (L3) of the non-magnetic partition walls 250A-1 and 250C-1 is set to a value corresponding to the length of the bipolar magnetized magnet. If the total length (LT) of the 250mm filament is more than 10%, the magnetic field mutual zone (MZ) and linear zone are clearly separated, and the position sensor 260 is connected to the line with either the first or second polarity. Only magnetic fields with geometrically varying strengths can be sensed.

[0290] On the other hand, the lens driving devices 1000-1, 2000, and 30 according to the first to fourth embodiments described above 00, 200A~200F are cameras for mobile devices such as mobile phones in various fields. This is applicable to the module (for example, reference numeral '1000' in the first embodiment).

[0291] The camera modules of the second to fourth embodiments are configured by the lens driving methods according to the second to fourth embodiments described above. devices 2000, 3000, 200A to 200F, and second to fourth lens driving devices 2000, Attached, inserted, fixed, contacted, joined, fixed, supported or placed in 3000, 200A to 200F The lens is attached to the bottom of the image sensor (not shown), and the image sensor is attached to the bottom of the image sensor (not shown). It may include a second circuit board (not shown) (or a main circuit board) and an optical system.

[0292] In this case, the camera modules according to the second to fourth embodiments are provided with the bobbins 110A, 110B or The lens barrel may further include a lens barrel coupled to the moving part 220. The second circuit board is located between the image sensor and the camera module. The optical system can also form the bottom surface of the filter. It may include at least one lens.

[0293] Furthermore, the camera modules according to the first to fourth embodiments described above include a camera module control unit (or a control unit) (not shown). In this case, the displacement sensing unit 82, 180 or the position sensor 260 is calculated based on the current change value or code value sensed. The first displacement value can be compared with the focal length of the lens depending on the distance between the object and the lens. Then, the camera module control unit calculates the first displacement value or the current position of the lens and the focus of the lens. If the point distances do not correspond, the first coil of the bobbin 30, 110A, 110B or the moving part 220 By readjusting the amount of current or code value applied to the coils 31 and 120, the bobbin 30 110A, 110B or the moving part 220 can be moved in the first direction by a second displacement amount. In addition, the housing member 40, 140 or the fixed portion 210 is fixedly connected to the fixed body. The displacement sensing unit 82, 180 or the position sensor 260 is a moving body, such as a bobbin 30, 110A, 110B or the moving part 220. 2B or the bipolar magnetized magnet 250 is moved in the first direction to sense the sensing magnet 70, The magnetic field (or magnetic force) emitted from 182A, 182B or the bipolar magnetized magnet 250 The change in the strength of the magnetic field is detected, and the amount of change in the current output is determined based on the amount of change in the strength of the magnetic field detected. or a separate driver IC or camera module based on the mapped code value. The current position or the first displacement amount of the bobbin 30, 110A, 110B or the moving part 220 is Thus, the displacement sensing unit 82, 180 or the position sensor Calculated or determined using the bobbin 30, 110A, 110B or moving part 220 The current position or the first displacement amount of the camera module of the first circuit board 80, 170A, 170B The camera module control unit then controls the bobbin 30 for autofocusing. , 110A, 110B or the position of the moving part 220 is re-determined to mark the first coils 31, 120. The amount of applied current can be adjusted, i.e., the code value can be maintained. Here, the applied current may output different values ​​depending on the shape and situation. This allows the amount of current applied to the first coils 31 and 120 to be adjusted.

[0294] For example, referring to FIGS. 9 and 12, the camera module control unit is mounted on the first circuit board 170. A, and the mark of the first coil 120 is determined based on the first displacement value sensed by the displacement sensing unit 180. For example, the camera module control unit can readjust the amount of applied current. The camera module can receive signals from pins 2-1 and 2-2 of the 180. The control unit can be mounted on the first circuit board 170A. In this case, the camera module control unit is not mounted on the first circuit board 170A but is mounted on a separate board. Here, the separate board can be used for the image sensor in the camera module. It may be a second circuit board (not shown) on which a sensor (not shown) is mounted, or it may be a separate circuit board (not shown). For example, the second circuit board may be the image sensor 1 shown in FIG. 1 may be mounted on a printed circuit board 10.

[0295] Meanwhile, the optical system can be equipped with autofocusing and hand tremor correction functions. An actuator module can be installed to provide autofocusing functionality. The actuator module can be configured in various ways, and the voice coil unit module The lens driving devices 1000-1 and 1000-2 according to the above-described embodiments are generally used. 000, 3000, 200A to 200F are actuators that perform the autofocusing function. However, the embodiment does not perform the autofocus function. Not only is it an actuator module, but it also has autofocusing and hand tremor compensation functions. It is also applicable to actuator modules that perform all positive functions.

[0296] Although not shown, a lens driving device that performs the autofocusing function described above. 1000-1, 2000, 3000, 200A~200F, second coil (not shown), support When a support member (not shown) and a plurality of sensors (not shown) are added, the lens driving device 1 000-1, 2000, 3000, 200A-200F only have autofocusing function In addition, the driving magnets 41 and 130 can also perform a hand shake correction function. The second coil is arranged so that the bottom surface of each of the plurality of sensing units directly faces the second coil. This can be realized by, for example, a Hall sensor, and each of the plurality of sensing parts and the second coil The rotor and the drive magnets 41 and 130 can be arranged on the same axis. Therefore, the second coil interacts with the driving magnets 41 and 130 to generate the second and / or Hand tremor correction can be performed by moving the housing members 40, 140 in a third direction.

[0297] At this time, a support member is disposed on the upper surface of the base 20, 190, so that the base 20, 190 is perpendicular to the first direction. The housing members 40, 140 are elastically supported against horizontal movement in various directions. The base 20, 190 supports the lower side of the housing member 40, 140. It is possible.

[0298] The camera modules of the first to fourth embodiments further include an infrared blocking filter (not shown). The infrared blocking filter prevents light in the infrared region from entering the image sensor. In this case, the base 190 is positioned opposite the image sensor. An infrared blocking filter can be attached at a position corresponding to the infrared blocking filter. The base 190 can be connected to the holder member 191. This can be done.

[0299] In the camera modules according to the second to fourth embodiments, the base 190 includes a second circuit. A separate terminal member may be attached for electrical connection to a substrate (not shown), Such a terminal member may be formed integrally with the base 190 using a surface electrode or the like. It is possible.

[0300] On the other hand, the lens driving devices 1000-1, 2000, 3000, and 2000-2 according to the first to fourth embodiments The bases 20 and 190 of 00A to 200F are used to mount the image sensors (for example, In the case of the lens drive unit, the function of the sensor holder to protect the lens drive unit corresponds to the reference number '11' In this case, a protrusion is formed downward along the side of the base 20, 190. However, this is not a necessary configuration, and a separate The sensor holder is arranged at the bottom of the base 20, 190 to perform its function. It is also possible to do so.

[0301] The lens driving devices 1000-1, 2000, and 3000 according to the first to fourth embodiments described above, The description of any one of the embodiments 200A to 200F does not contradict the description of any other embodiment. It goes without saying that the same can be applied to other embodiments as well.

[0302] The above description has been centered on the examples, but these are merely examples and do not limit the present invention. The essential characteristics of this embodiment are not apparent to those skilled in the art. It is understood that various modifications and applications not exemplified above are possible within the scope of the present invention. For example, each component specifically shown in the embodiment can be modified. and the differences associated with such modifications and applications are defined in the appended claims. The present invention will be understood to be included within the scope of the present invention as defined in the appended claims.

[0303] The mode for carrying out the invention is fully described in the "Best Mode for Carrying Out the Invention" above. It was. [Industrial Applicability]

[0304] The lens driving device and the camera module including the lens driving device according to the embodiment are used in a mobile phone (or a cell phone). It can also be applied to mobile devices such as smartphones, notebook type personal computers, tablet PCs, camera phones, PDAs, smart phones , toys, and various other multimedia fields, as well as surveillance cameras and video tapes. This technology can be applied to image input devices such as recorder information terminals.

Claims

1. base; a cover member coupled to the base and including a top surface and a plurality of side walls extending from the top surface; a bobbin disposed on the base and movable in the optical axis direction; a pair of drive magnets disposed on the cover member; a coil disposed on the bobbin and facing the pair of drive magnets; a sensing magnet disposed on the bobbin; and a position sensor for detecting the sensing magnet; The side walls of the cover member include first and second side walls disposed opposite each other, and a front wall. and a third and fourth side walls disposed between the first and second side walls and on opposite sides of each other. fruit, The pair of drive magnets includes a first magnet disposed on the first side wall of the cover member. a second magnet disposed on the second side wall of the cover member; The drive magnet is not disposed on the third side wall and the fourth side wall of the cover member. in, The sensing magnet is a third magnet of the bobbin corresponding to the third side wall of the cover member. A lens drive device is arranged on one surface.

2. a circuit board including a plurality of terminals; the circuit board is disposed at a position corresponding to the third side wall of the cover member, The position sensor is disposed on the circuit board; The lens driving device according to claim 1 , wherein the plurality of terminals are disposed on the lower surface of the circuit board. 。

3. The pair of drive magnets are arranged parallel to each other, 2. The lens drive according to claim 1, wherein the cover member is made of a metal material or a magnetic material. motion device.

4. The sensing magnet is disposed at a position not facing the pair of driving magnets.

2. The method of claim 1, wherein the sensing magnet is smaller than the pair of drive magnets. Lens drive unit.

5. The sensing magnet is disposed in a direction perpendicular to the surface of the third side wall facing the bobbin.

2. The lens driving device according to claim 1, wherein the cover member does not overlap the third side wall. Place.

6. The cover member is integrally formed with the inner yoke, The inner yoke of the cover member includes four inner yokes, The four inner yokes are positioned at positions corresponding to the four corners of the cover member. Located in One side of the inner yoke is spaced apart from the coil, and the other side of the inner yoke is The lens driving device according to claim 1 , wherein the lens driving device is spaced apart from the bobbin.

7. The inner yoke a folding portion that is folded downward from the cover member; and a bottleneck section formed adjacent to the bent portion, 7. The lever according to claim 6, wherein the bottleneck section of the inner yoke is symmetrically formed. Lens drive unit.

8. The first magnet is fixed to the first side wall of the cover member by an adhesive. a second magnet fixed to the second side wall of the cover member by the adhesive; 6. The lens driving device according to any one of items 1 to 5.

9. an elastic member coupled to the bobbin; The elastic member includes a lower elastic member coupled to the bottom surface of the bobbin and a lower elastic member coupled to the top surface of the bobbin. an upper elastic member attached to the The lower elastic member includes a first spring and a second spring spaced apart from each other, The first spring is electrically connected to one end of the coil, The second spring is electrically connected to the other end of the coil, The lens of claim 1 , wherein the first spring and the second spring are electrically connected to a circuit board. Drive device.

10. The laser of claim 9 , wherein at least a portion of the circuit board is disposed on a side surface of the base. Lens drive unit.

11. the position sensor includes a Hall sensor; 6. Any one of claims 1 to 5, wherein the sensing magnet includes a bipolar magnetized magnet.

1. The lens driving device according to claim 1.

12. The bobbin is formed on a side wall of the bobbin and faces the third side wall of the cover member. Including recesses, 6. The method of claim 1, wherein the sensing magnet is disposed in the recess of the bobbin. The lens driving device according to any one of the above.

13. 6. The method of claim 1, wherein the pair of drive magnets are disposed in a housing. The lens driving device according to one embodiment of the present invention.

14. a compensation magnet disposed on the bobbin opposite the sensing magnet; The sensing magnet and the compensation magnet are 10. The pair of drive magnets according to claim 1, wherein the pair of drive magnets are not overlapped in the direction toward the optical axis.

5. A lens driving device according to any one of the preceding items.

15. The sensing magnet faces the coil in the optical axis direction or contacts the coil.

6. The lens driving device according to claim 1, wherein:

16. The lens of claim 2 , wherein the circuit board is disposed on the third side wall of the cover member. Drive unit.

17. The circuit board according to claim 2 , wherein the circuit board is disposed on the inner surface of the third side wall of the cover member. Lens drive unit.

18. The sensing magnet is disposed in a position facing the first side wall of the cover member and the bobbin.

2. The lens driving device according to claim 1, wherein the first side wall is overlapped with the surface of the first side wall in a vertical direction. 。

19. A lens driving device according to any one of claims 1 to 18; a lens barrel coupled to the bobbin; Image sensors; and A printed circuit board on which the image sensor is mounted 1. A camera module including a camera board (PCB).

20. The sensing magnet and the position sensor are used to receive the position information of the bobbin.

20. The method of claim 19, wherein the camera performs auto focus (AF) using the Camera module.

21. base; a cover member coupled to the base and including a top surface and a plurality of side walls extending from the top surface; a bobbin disposed on the base and movable in the optical axis direction; a pair of drive magnets disposed on the cover member; a coil disposed on the bobbin and facing the pair of drive magnets; a sensing magnet disposed on the bobbin; and a position sensor for detecting the sensing magnet; The side walls of the cover member include first and second side walls disposed opposite each other, and a front wall. and a third and fourth side walls disposed between the first and second side walls and on opposite sides of each other. fruit, The pair of drive magnets includes a first magnet disposed on the first side wall of the cover member. a second magnet disposed on the second side wall of the cover member; The driving magnet is not disposed on the third side wall and the fourth side wall of the cover member, The sensing magnet is a third magnet of the bobbin corresponding to the third side wall of the cover member. It is placed on one side, The coil is wound on the outer surface of the bobbin, The first magnet is fixed to the first side wall of the cover member by an adhesive. The second magnet is fixed to the second side wall of the cover member by the adhesive. Lens drive unit.

22. The sensing magnet is disposed in a direction perpendicular to the surface of the third side wall facing the bobbin.

22. The lens driver of claim 21, wherein the lens driver does not overlap the third side wall of the cover member. Device.

23. The sensing magnet is disposed in a position facing the first side wall of the cover member and the bobbin.

22. The lens driving device according to claim 21, wherein the lens driving device is vertically overlapped with a surface of the first side wall. Place.

Images