KR20230040314A - Lens driving unit, camera module and optical apparatus - Google Patents

Abstract

The present invention relates to a lens driving unit including: a first movable member including a first driving unit and a bobbin on which the first driving unit is located; a second movable unit including a second driving unit that moves the first driving unit through electromagnetic interaction with the first driving unit, and a housing in which the second driving unit is located; a stator including a third driving unit that moves the second driving unit through electromagnetic interaction with the second driving unit; a first magnet located on one side of the bobbin; a sensor unit located in the housing and detecting the position of the first magnet; and a second magnet located on the other side of the bobbin. According to the present invention, a more precise autofocus function can be provided by providing an autofocus feedback function.

Description

Lens driving unit, camera module and optical apparatus {Lens driving unit, camera module and optical apparatus}

This embodiment relates to a lens driving unit, a camera module, and an optical device.

As the distribution of various portable terminals is widely generalized and wireless Internet services are commercialized, consumers' demands related to portable terminals are also diversifying, and various types of additional devices are being installed in portable terminals.

Among them, a typical example is a camera module that takes a picture or video of a subject.

Meanwhile, recently, a camera module having an auto focus function has been used, and auto focus feedback needs to be used for more precise auto focus control.

However, when autofocus feedback is applied to a conventional camera module, the sensing structure for detecting the position of the bobbin affects the posture of the bobbin, resulting in static tilt and dynamic tilt. there is a problem that arises.

In order to solve the above problem, a lens driving unit having a first magnet for sensing the position of a bobbin and a second magnet that balances magnetic force is provided.

In addition, it is intended to provide a camera module and an optical device having a precise autofocus function, an image stabilization function, an autofocus feedback function, and/or an image stabilization feedback function using the lens driving unit.

In order to solve the above problems, a first mover including a first driving unit and a bobbin on which the first driving unit is located; a second mover including a second drive unit for moving the first drive unit through electromagnetic interaction with the first drive unit and a housing in which the second drive unit is located; a third driving unit moving the second driving unit through electromagnetic interaction with the second driving unit; a first magnet located on one side of the bobbin; a sensor unit located in the housing and sensing a position of the first magnet; And it may include a second magnet located on the other side of the bobbin.

The first magnet and the second magnet may be positioned not to face the second driving unit.

The housing includes a first side surface, a second side surface adjacent to the first side surface, and a corner portion formed by meeting the first side surface and the second side surface, and the bobbin is configured to face the first side surface. A first outer circumferential surface, a second outer circumferential surface facing the second side surface, and a third outer circumferential surface facing the corner portion may be included, and the first magnet may be positioned on the third outer circumferential surface.

The housing further includes a third side surface adjacent to the second side surface, and the second driving part includes a first driving magnet positioned on the first side surface and a second driving magnet positioned on the second side surface. , It includes a third driving magnet located on the third side, and the separation distance between the first driving magnet and the second driving magnet may be longer than the separation distance between the second driving magnet and the third driving magnet. there is.

The housing includes a first side surface, a second side surface adjacent to the first side surface, and a corner portion formed by meeting the first side surface and the second side surface, and the bobbin is configured to face the first side surface. A first outer circumferential surface, a second outer circumferential surface facing the second side surface, and a third outer circumferential surface facing the corner portion, wherein the first magnet is located on the first outer circumferential surface, and the first magnet is positioned on the first outer circumferential surface. 3 It may be located on the outer circumferential side.

The second driving part includes a first driving magnet positioned on the first side surface and a second driving magnet positioned on the second side surface, and the first driving magnet may be smaller than the second driving magnet.

The first magnet may be positioned to be spaced apart from the first driving unit in a direction corresponding to an optical axis direction of a lens module coupled to the inside of the bobbin.

The sensor unit may be positioned to be spaced apart from the second driving unit in a direction corresponding to an optical axis direction of a lens module coupled to the inside of the bobbin.

A projection of the first magnet onto the housing may not overlap with the second driving unit.

The first magnet may be located in a seating groove formed in the bobbin.

The seating groove may be a lower open type or an upper open type, and N poles and S poles may be positioned on upper and lower surfaces of the first magnet.

The seating groove has a vertically closed type in which a portion of the outer circumferential surface is recessed inward, and the N pole and S pole of the first magnet may be positioned on a side surface.

The first magnet and the second magnet may be spaced apart from each other by a distance corresponding to the center of the bobbin.

The center of the bobbin may be located on an imaginary line connecting the first magnet and the second magnet.

The first magnet and the second magnet may have corresponding shapes and sizes.

The first magnet and the second magnet may be positioned to balance magnetic forces with each other.

The camera module according to the present embodiment includes a first mover including a first drive unit and a bobbin on which the first drive unit is located; a second mover including a second drive unit for moving the first drive unit through electromagnetic interaction with the first drive unit and a housing in which the second drive unit is located; a third driving unit moving the second driving unit through electromagnetic interaction with the second driving unit; a first magnet located on one side of the bobbin; a sensor unit located in the housing and sensing a position of the first magnet; And it may include a second magnet located on the other side of the bobbin.

The first driving unit includes a coil, and further includes a control unit for applying power to the coil to move the first mover relative to the second mover, wherein the control unit moves the first magnet detected by the sensor unit. It is possible to control the power applied to the coil by receiving the position of the coil.

The optical device according to the present embodiment includes a main body, a display unit disposed on one surface of the main body to display information, and a camera module installed in the main body to take an image or photo, and a first driving unit; a first mover including a bobbin on which a first driving unit is located; a second mover including a second drive unit for moving the first drive unit through electromagnetic interaction with the first drive unit and a housing in which the second drive unit is located; a third driving unit moving the second driving unit through electromagnetic interaction with the second driving unit; a first magnet located on one side of the bobbin; a sensor unit located in the housing and sensing a position of the first magnet; And it may include a second magnet located on the other side of the bobbin.

Through the present invention, it is possible to provide a precise auto focus function, hand shake correction function, auto focus feedback function, and/or hand shake correction feedback function.

1 is a perspective view of a lens driving unit according to an embodiment of the present invention.
2 is an exploded perspective view of a lens driving unit according to an embodiment of the present invention.
3 is a plan view showing a part of a lens driving unit according to an embodiment of the present invention.
FIG. 4 is a plan view illustrating the lens driving unit of FIG. 3 with a housing omitted.
5 is a cross-sectional view viewed from L1-L2 in FIG. 1;
6 is a conceptual diagram illustrating a lens driving unit according to an embodiment and a modified example of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description will be omitted.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element may be directly connected or connected to the other element, but there may be another element between the elements. It should be understood that may be "connected", "coupled" or "connected".

"PCB" used below means a printed circuit board as an abbreviation for Printed Circuit Board. In addition, "FPCB" used below means a flexible printed circuit board as an abbreviation for Flexible Printed Circuit Board.

Hereinafter, the configuration of an optical device according to an embodiment of the present invention will be described.

An optical device according to an embodiment of the present invention includes a mobile phone, a mobile phone, a smart phone, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP ( Portable Multimedia Player), navigation, etc., but is not limited thereto, and any device for capturing images or photos is possible.

An optical device according to an embodiment of the present invention includes a main body (not shown), a display unit (not shown) disposed on one surface of the main body to display information, and a camera installed on the main body to take an image or a photo. It may include a camera (not shown) having a module (not shown).

Hereinafter, the configuration of the camera module will be described.

The camera module may further include a lens driving unit 10, a lens module (not shown), an infrared cut filter (not shown), a printed circuit board (not shown), an image sensor (not shown), and a controller (not shown). can

The lens module may include one or more lenses (not shown) and a lens barrel accommodating the one or more lenses. However, one configuration of the lens module is not limited to the lens barrel, and any holder structure capable of supporting one or more lenses may be used. The lens module may be coupled to the lens driving unit 10 and move together with the lens driving unit 10 . The lens module may be screwed to the lens driving unit 10 as an example. The lens module may be coupled to the inside of the lens driving unit 10 as an example. Meanwhile, light passing through the lens module may be irradiated to the image sensor.

The infrared cut filter may block light in the infrared region from being incident on the image sensor. An infrared cut filter may be positioned between the lens module and the image sensor as an example. The infrared cut filter may be installed on the base 500 to be described later, and may be combined with a holder member (not shown). The infrared filter may be mounted in the hollow hole 510 formed in the center of the base 500. As an example, the infrared filter may be formed of a film material or a glass material. Meanwhile, the infrared filter, for example, may be formed by coating an infrared blocking coating material on a flat optical filter such as a cover glass for protecting an imaging surface or a cover glass.

The printed circuit board may support the lens driving unit 10 . An image sensor may be mounted on the printed circuit board. More specifically, the lens driving unit 10 may be positioned on the top of the printed circuit board, and the image sensor may be positioned inside the top surface of the printed circuit board. In addition, a sensor holder (not shown) may be coupled to an outer side of an upper surface of the printed circuit board, and a lens driving unit may be coupled to the sensor holder. Through the above structure, light passing through the lens module accommodated inside the lens driving unit 10 may be irradiated to the image sensor mounted on the printed circuit board. The printed circuit board may supply power to the lens driving unit 10 . Meanwhile, a control unit for controlling the lens driving unit 10 may be located on the printed circuit board.

The image sensor may be mounted on a printed circuit board. The image sensor may be positioned such that an optical axis coincides with the lens module. Through this, the image sensor may obtain light passing through the lens module. The image sensor may output irradiated light as an image. The image sensor may be, for example, a charge coupled device (CCD), a metal oxide semi-conductor (MOS), a CPD, and a CID. However, the type of image sensor is not limited thereto.

The control unit may be mounted on a printed circuit board. Alternatively, the control unit may also be located inside the lens driving unit 10 . The control unit may control the direction, intensity, and amplitude of the current supplied to each component constituting the lens driving unit 10 . The controller may control the lens driving unit 10 to perform at least one of an auto focus function and a hand shake correction function of the camera module. That is, the controller may control the lens driving unit 10 to move the lens module in the direction of the optical axis, or to move or tilt the lens module in a direction perpendicular to the direction of the optical axis. Furthermore, the controller may perform feedback control of the auto focus function and hand shake correction function. In more detail, the control unit may receive the position of the first magnet 810 detected by the second sensor unit 900 and control power or current applied to the first driving unit 220 or the second driving unit 320. .

Hereinafter, the configuration of the lens driving unit 10 will be described in detail with reference to the drawings.

1 is a perspective view of a lens driving unit according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the lens driving unit according to an embodiment of the present invention, and FIG. 3 is a lens driving unit according to an embodiment of the present invention. A plan view showing a part of the unit, FIG. 4 is a plan view showing the lens driving unit of FIG. 3 omitting a housing, FIG. 5 is a cross-sectional view viewed from L1-L2 in FIG. 1, and FIG. 6 is an embodiment of the present invention. It is a conceptual diagram showing a lens driving unit according to examples and modifications.

1 to 7 , the lens driving unit 10 according to an embodiment of the present invention includes a cover member 100, a first mover 200, a second mover 300, and a stator 400. ), a base 500, a support member 600 and a first sensor unit 700 may be included. However, in the lens driving unit 10 according to an embodiment of the present invention, the cover member 100, the first mover 200, the second mover 300, the stator 400, the base 500, the support Any one or more of the member 600 and the first sensor unit 700 may be omitted.

The cover member 100 may form the exterior of the lens driving unit 10 . The cover member 100 may have a hexahedral shape with an open bottom. However, it is not limited thereto. The cover member 100 may include an upper surface 101 and a side surface 102 extending downward from an outer side of the upper surface 101 . Meanwhile, the cover member 100 may be mounted on top of the base 500 . The first mover 200, the second mover 300, the stator 400, and the support member 600 may be positioned in the inner space formed by the cover member 100 and the base 500. In addition, the cover member 100 may be mounted on the base 500 by being in close contact with a part or all of the side surface of the base 500 to be described later. Through such a structure, the cover member 100 may have a function of preventing penetration of external contaminants while protecting internal components from external impact.

As an example, the cover member 100 may be formed of a metal material. More specifically, the cover member 100 may be provided with a metal plate material. In this case, the cover member 100 can block radio wave interference. That is, the cover member 100 may block radio waves generated outside the lens driving unit 10 from being introduced into the cover member 100 . In addition, the cover member 100 may block radio waves generated inside the cover member 100 from being emitted to the outside of the cover member 100 . However, the material of the cover member 100 is not limited thereto.

The cover member 100 may include an opening 110 formed on the upper surface 101 to expose the lens module. The opening 110 may have a shape corresponding to that of the lens module. The size of the opening 110 may be larger than the diameter of the lens module so that the lens module can be assembled through the opening 110 . Also, light introduced through the opening 110 may pass through the lens module. Meanwhile, light passing through the lens module may be transmitted to the image sensor.

The first mover 200 may include a bobbin 210 and a first driving unit 220 . The first mover 200 may be combined with a lens module, which is a component of the camera module (however, the lens module may also be described as a component of the lens driving unit 10). That is, the lens module may be located inside the first mover 200 . In other words, the outer circumferential surface of the lens module may be coupled to the inner circumferential surface of the first mover 200 . Meanwhile, the first mover 200 may move integrally with the lens module through interaction with the second mover 300 . That is, the first mover 200 may move the lens module.

The first mover 200 may include a bobbin 210 . In addition, the first mover 200 may include a first driving unit 220 coupled to the bobbin 210 .

The bobbin 210 may be coupled to the lens module. More specifically, the outer circumferential surface of the lens module may be coupled to the inner circumferential surface of the bobbin 210 . Meanwhile, the first driving unit 220 may be coupled to the bobbin 210 . In addition, the lower part of the bobbin 210 may be coupled to the lower support member 620 and the upper part of the bobbin 210 may be coupled to the upper support member 610 . The bobbin 210 may be located inside the housing 310 . The bobbin 210 may relatively flow in the optical axis direction with respect to the housing 310 .

The bobbin 210 may include a lens coupling part 211 formed on the inside. A lens module may be coupled to the lens coupler 211 . A screw thread having a shape corresponding to a screw thread formed on an outer circumferential surface of the lens module may be formed on an inner circumferential surface of the lens coupler 211 . That is, the outer circumferential surface of the lens module may be screwed to the inner circumferential surface of the lens coupler 211 .

The bobbin 210 may include a first driving unit coupling part 212 on which the first driving unit 220 is wound or mounted. The first driving unit coupling part 212 may be integrally formed with the outer surface of the bobbin 210 . In addition, the first drive unit coupling portion 212 may be formed continuously along the outer surface of the bobbin 210 or may be formed spaced apart at predetermined intervals. The first driving part coupling part 212 may include a recessed part formed by a part of the outer surface of the bobbin 210 being recessed. The first driving unit 220 may be positioned at the first driving unit coupling part 212, and the first driving unit 220 located at the first driving unit coupling unit 212 forms a part of the first driving unit coupling unit 212. It can be supported by a support part that does.

The bobbin 210 may include an upper coupling portion 213 coupled to the upper support member 610 . The upper coupling portion 213 may be coupled to the inner portion 612 of the upper support member 610 . As an example, the upper coupling portion 213 provided as a protrusion may be inserted into a groove or hole of the inner portion 612 and coupled thereto. On the other hand, the upper support member 610 is provided with a protrusion and the bobbin 210 is provided with a groove or a hole so that both may be coupled. Meanwhile, the bobbin 210 may include a lower coupling portion (not shown) coupled to the lower support member 620 . The lower coupling portion formed at the lower portion of the bobbin 210 may be coupled to the inner portion 622 of the lower support member 620 . As an example, the lower coupling portion provided as a protrusion may be inserted into a groove or a hole of the inner portion 622 and coupled thereto.

The first driving unit 220 may be positioned to face the second driving unit 320 of the second mover 300 . The first driving unit 220 may move the bobbin 210 relative to the housing 310 through electromagnetic interaction with the second driving unit 320 . The first driving unit 220 may include a coil. The coil may be guided to the first driving part coupling part 212 and wound on the outer surface of the bobbin 210 . Also, as another embodiment, the coils may be arranged on the outer surface of the bobbin 210 such that four coils are independently provided so that two adjacent coils form a 90° angle to each other. When the first driving unit 220 includes a coil, power supplied to the coil may be supplied through the lower support member 620 . At this time, the lower support member 620 may be provided separately as a pair to supply power to the coil. Meanwhile, the first driving unit 220 may include a pair of lead wires (not shown) for power supply. In this case, each of the pair of lead wires of the first driving unit 220 may be electrically coupled to each of the pair of lower support members 620 . Meanwhile, when power is supplied to the coil, an electromagnetic field may be formed around the coil. Also, in another embodiment, the first driving unit 220 may include a magnet. In this case, the second driving unit 320 may be provided as a coil.

The second mover 300 may be located outside the first mover 200 facing the first mover 200 . The second mover 300 may be supported by the base 500 located on the lower side. The second mover 300 may be located in the inner space of the cover member 100 .

The second mover 300 may include a housing 310 positioned outside the bobbin 210 . In addition, the second mover 300 may include a second drive unit 320 positioned opposite to the first drive unit 220 and fixed to the housing 310 .

The housing 310 may be formed in a shape corresponding to the inner surface of the cover member 100 forming the exterior of the lens driving unit 10 . In addition, the housing 310 is formed of an insulating material and may be formed as an injection molding product in consideration of productivity. The housing 310 is a moving part for driving optical image stabilization (OIS) and may be spaced apart from the cover member 100 by a predetermined distance. However, in the AF model, the housing 310 may be fixed on the base 500. Also, in the AF model, the housing 310 may be omitted and the magnet provided as the second driving unit 320 may be fixed to the cover member 100 .

The upper and lower sides of the housing 310 are open to accommodate the first mover 200 movably in the vertical direction. The housing 310 may include an upper and lower open inner space 311 inside. The first mover 200 may be movably positioned in the inner space 311 . That is, the inner space 311 may have a shape corresponding to that of the first mover 200 . In addition, the outer circumferential surface of the inner space 311 may be spaced apart from the outer circumferential surface of the first mover 200 .

The housing 310 may include a second driving unit coupling part 312 formed in a shape corresponding to the second driving unit 320 on a side surface and accommodating the second driving unit 320 . That is, the second driving unit coupling part 312 may accommodate and fix the second driving unit 320 . The second driving unit 320 may be fixed to the second driving unit coupling part 312 by an adhesive (not shown). Meanwhile, the second driving unit coupling part 312 may be located on an inner circumferential surface of the housing 310 . In this case, there is an advantage in electromagnetic interaction with the first driving unit 220 located inside the second driving unit 320 . In addition, the second driving unit coupling part 312, as an example, may have an open bottom. In this case, there is an advantage in electromagnetic interaction between the third driving unit 420 and the second driving unit 320 located below the second driving unit 320 . As an example, four second driving unit couplers 312 may be provided. The second driving unit 320 may be coupled to each of the four second driving unit coupling parts 312 .

An upper support member 610 may be coupled to an upper portion of the housing 310 and a lower support member 620 may be coupled to a lower portion of the housing 310 . The housing 310 may include an upper coupling portion 313 coupled to the upper support member 610 . The upper coupling portion 313 may be coupled to the outer portion 611 of the upper support member 610 . As an example, the upper coupling portion 313 provided as a protrusion may be inserted into a groove or hole of the outer portion 611 and coupled thereto. On the other hand, in another embodiment, the upper support member 610 is provided with a protrusion and the housing 310 is provided with a groove or a hole so that both may be coupled. Meanwhile, the housing 310 may include a lower coupling portion (not shown) coupled to the lower support member 620 . The lower coupling portion formed at the lower portion of the housing 310 may be coupled to the outer portion 621 of the lower support member 620 . As an example, the lower coupling portion provided as a protrusion may be inserted into the groove or hole of the outer portion 621 and coupled thereto.

The second driving unit 320 may be positioned to face the first driving unit 220 of the first mover 200 . The second driving unit 320 may move the first driving unit 220 through electromagnetic interaction with the first driving unit 220 . The second driving unit 320 may include a magnet. The magnet may be fixed to the second driving part coupling part 312 of the housing 310 . As an example, as shown in FIG. 2 , the second driving unit 320 may be disposed on the housing 310 such that four magnets are independently provided so that two adjacent magnets form an angle of 90° to each other. That is, the second driving unit 320 is mounted on the four side surfaces of the housing 310 at equal intervals to promote efficient use of the internal volume. In addition, the second driving unit 320 may be attached to the housing 310 with an adhesive or the like, but is not limited thereto. Meanwhile, the first driving unit 220 may include a magnet and the second driving unit 320 may include a coil.

The stator 400 may be positioned to face the lower side of the second mover 300 . Meanwhile, the stator 400 may move the second mover 300 . In addition, through-holes 411 and 421 corresponding to the lens module may be located at the center of the stator 400 .

The stator 400 may include a circuit board 410 positioned between the third driving unit 420 and the base 500 . In addition, the stator 400 may include a third driving unit 420 positioned opposite to the lower side of the second driving unit 320 .

The circuit board 410 may include a flexible printed circuit board (FPCB), which is a flexible circuit board. The circuit board 410 may be positioned between the third driving unit 420 and the base 500 . Meanwhile, the circuit board 410 may supply power to the third driving unit 420 . In addition, the circuit board 410 may supply power to the first driving unit 220 through the side support member 630, the upper support member 610, the conducting member 640, and the lower support member 620. The circuit board 410 may include a through hole 411 through which light passing through the lens module passes. In addition, the circuit board 410 may include a terminal portion 412 that is bent and exposed to the outside. The terminal unit 412 may be connected to an external power source, through which power may be supplied to the circuit board 410 .

The third driving unit 420 may include a coil. When power is applied to the coil of the third driving unit 420, the second driving unit 320 and the housing 310 to which the second driving unit 320 is fixed can move integrally by interaction with the second driving unit 320. there is. The third driving unit 420 may be mounted on or electrically connected to the circuit board 410 . Meanwhile, the third driving unit 420 may include a through hole 421 through which light of the lens module passes. In addition, considering the miniaturization of the lens driving unit 10 (lowering the height in the z-axis direction, which is the optical axis direction), the third driving unit 420 is formed of a patterned coil, FP coil, to form a circuit board (410) can be arranged or mounted.

The base 500 may support the second mover 300 . A printed circuit board may be positioned below the base 500 . The base 500 may include a through hole 510 formed at a position corresponding to the lens coupler 211 of the bobbin 210 . The base 500 may perform a sensor holder function to protect the image sensor. Meanwhile, an infrared ray filter may be positioned in the base 500 . An infrared filter may be coupled to the through hole 510 of the base 500 .

The base 500, as an example, may include a foreign matter collecting unit 520 that collects foreign matter introduced into the cover member 100. The foreign matter collecting unit 520 is located on the upper surface of the base 500 and can collect foreign matter on the inner space formed by the cover member 100 and the base 500, including an adhesive material. The base 500 may include a sensor mounting portion 530 to which the first sensor unit 700 is coupled. That is, the first sensor unit 700 may be mounted on the sensor mounting unit 530 . In this case, the first sensor unit 700 may detect the movement of the housing 310 in the horizontal direction by sensing the second driving unit 320 coupled to the housing 310 . As an example, two sensor mounting units 530 may be provided. A first sensor unit 700 may be positioned on each of the two sensor mounting units 530 . In this case, the first sensor unit 700 may be disposed to detect both movements of the housing 310 in the x-axis and y-axis directions.

The support member 600 may connect any two or more of the first mover 200 , the second mover 300 and the base 500 . The support member 600 can elastically connect any two or more of the first mover 200, the second mover 300, and the base 500 to enable relative movement between the respective components. there is. That is, the support member 600 may be provided as an elastic member. The support member 600 may include an upper support member 610, a lower support member 620, a side support member 630, and a conducting member 640, as shown in FIG. 2 as an embodiment. However, the energizing member 640 is provided for energizing the upper support member 610 and the lower support member 620, and the upper support member 610, the lower support member 620, and the side support member 630 It can be explained separately from .

The upper support member 610 may include, for example, an outer portion 611 , an inner portion 612 , and a connection portion 613 . The upper support member 610 includes an outer portion 611 coupled to the housing 310, an inner portion 612 coupled to the bobbin 210, and a connecting portion elastically connecting the outer portion 611 and the inner portion 612 ( 613) may be included.

The upper support member 610 may be connected to an upper portion of the first mover 200 and an upper portion of the second mover 300 . In more detail, the upper support member 610 may be coupled to the top of the bobbin 210 and the top of the housing 310 . The inner portion 612 of the upper support member 610 is coupled to the upper coupling portion 213 of the bobbin 210, and the outer portion 611 of the upper support member 610 is coupled to the upper coupling portion 313 of the housing 310. can be combined with

The upper support member 610, as an embodiment, may be provided by being separated into six pieces. At this time, two of the six upper support members 610 may be used to apply power to the first driving unit 220 by being energized with the lower support member 620 . Each of the two upper support members 610 may be electrically connected to each of the pair of lower support members 620a and 620b through a conducting member 640 . Meanwhile, the remaining four of the six upper support members 610 may be used to supply power to the second sensor unit 900 and transmit/receive information or signals between the control unit and the second sensor unit 900. . Also, as a modified example, two of the six upper support members 610 may be directly connected to the first driving unit 220 and four may be connected to the second sensor 900 .

The lower support member 620 may include, for example, a pair of lower support members 620a and 620b. That is, the lower support member 620 may include a first lower support member 620a and a second lower support member 620b. Each of the first lower support member 620a and the second lower support member 620b may be connected to a pair of lead wires of the first driving unit 220 provided as a coil to supply power. Meanwhile, the pair of lower support members 620 may be electrically connected to the circuit board. Through this structure, the pair of lower support members 620 may provide power supplied from the circuit board to the first driving unit 220 .

The lower support member 620 may include, for example, an outer portion 621, an inner portion 622, and a connection portion 623. The lower support member 620 includes an outer portion 621 coupled to the housing 310, an inner portion 622 coupled to the bobbin 210, and a connecting portion elastically connecting the outer portion 621 and the inner portion 622 ( 623) may be included.

The lower support member 620 may be connected to a lower portion of the first mover 200 and a lower portion of the second mover 300 . In more detail, the lower support member 620 may be coupled to the lower part of the bobbin 210 and the lower part of the housing 310 . The lower coupling portion of the bobbin 210 may be coupled to the inner portion 622 of the lower support member 620, and the lower coupling portion of the housing 310 may be coupled to the outer portion 621 of the lower support member 620.

The side support member 630 may have one end fixed to the stator 400 or the base 500 and the other end coupled to the upper support member 610 or the second mover 300 . As an example, the side support member 630 may have one side coupled to the base 500 and the other side coupled to the second mover 300 . Also, in another embodiment, the side support member 630 may have one side coupled to the stator 400 and the other side coupled to the upper support member 610 . In this way, the lateral support member 630 elastically supports the second mover 300 so that the second mover 300 can move or tilt in the horizontal direction.

The side support members 630 may be provided in the same number as the upper support members 610 as an example. That is, the lateral support members 630 may be provided in six pieces and connected to each of the six upper support members 610 provided. In this case, the side support members 630 may supply power supplied from the stator 400 or the outside to each of the upper support members 610 . As an example, the number of side support members 630 may be determined in consideration of symmetry. Eight lateral support members 630, two each at each corner of the housing 310, as shown in FIG. 2 as one embodiment, may be provided.

The lateral support member 630 or the upper support member 610 may include a structure for absorbing shock as an example. The structure for absorbing the shock may be provided on any one or more of the lateral support member 630 and the upper support member 610 . The shock absorbing component may be a separate member such as a damper. In addition, the configuration for absorbing the shock may be realized by changing a shape of any one part of the lateral support member 630 and the upper support member 610 .

The conducting member 640 may electrically connect the upper support member 610 and the lower support member 620 . The conducting member 640 may be provided separately from the lateral support member 630 . Power supplied to the upper support member 610 through the conducting member 640 may be supplied to the lower support member 620 , and power may be supplied to the first driving unit 220 through the lower support member 620 . Meanwhile, as a modified example, when the upper support member 610 is directly connected to the first driving unit 220, the conducting member 640 may be omitted.

The first sensor unit 700 may be used for one or more of auto focus (AF) feedback and optical image stabilization (OIS) feedback. That is, the first sensor unit 700 can detect the position or movement of one or more of the first mover 200 and the second mover 300 . As an example, the first sensor unit 700 may sense horizontal movement or tilt of the second mover 300 and provide information for OIS feedback.

The first sensor unit 700 may be located on the stator 400 . The first sensor unit 700 may be located on the upper or lower surface of the circuit board 410 of the stator 400 . As an example, the first sensor unit 700 may be located on a sensor mounting unit 530 disposed on the lower surface of the circuit board and formed on the base 500 . The first sensor unit 700 may include a Hall sensor as an example. In this case, the relative motion of the second mover 300 with respect to the stator 400 may be sensed by sensing the magnetic field of the second drive unit 320 of the second mover 300 . As an example, two or more first sensor units 700 may be provided to detect both x-axis and y-axis movements of the second mover 300 .

The lens driving unit 10 according to an embodiment of the present invention includes, for example, a first mover 200 including a first driving unit 220 and a bobbin 210 on which the first driving unit 220 is located; A second mover including a second drive unit 320 that moves the first drive unit 220 through electromagnetic interaction with the first drive unit 220 and a housing 310 in which the second drive unit 320 is located. 300, a stator 400 including a third driving unit 420 for moving the second driving unit 320 through electromagnetic interaction with the second driving unit 320, and a first unit located on one side of the bobbin 210. 1 magnet 810, a second sensor unit 900 located in the housing 310 and detecting the position of the first magnet 810, and a second magnet 820 located on the other side of the bobbin 210. can do.

The bobbin 210 may include a first outer circumferential surface 215 , a third outer circumferential surface 217 , and a second outer circumferential surface 216 that are continuously disposed. On the other hand, the housing 310 has a first side surface 315 facing the first outer circumferential surface 215, a second side surface 316 facing the second outer circumferential surface 216, and a third outer circumferential surface 217 facing each other. It may include a corner portion 319 that does. The housing 310 has a first side surface 315, a second side surface 316 adjacent to the first side surface 315, and a corner portion formed by meeting the first side surface 315 and the second side surface 316. (319). On the other hand, the bobbin 210 has a first outer circumferential surface 215 facing the first side surface 315, a second outer circumferential surface 216 facing the second side surface 316, and a corner portion 319 facing the A third outer circumferential surface 217 may be included. At this time, the first magnet 810 may be positioned on the third outer circumferential surface 217 of the bobbin 210 . In addition, the second driving unit 320 provided as a magnet may be positioned on the first side surface 315 and the second side surface 316 of the housing 310 . The housing 310 may include a first side surface 315 , a second side surface 316 , a third side surface 317 , and a fourth side surface 318 successively adjacent to each other.

The second driving unit 320 may include a first driving magnet 321 , a second driving magnet 322 , a third driving magnet 323 , and a fourth driving magnet 324 . At this time, the first driving magnet 321 is located on the first side surface 315, the second driving magnet 322 is located on the second side surface 316, and the third driving magnet 323 is located on the third side surface 317. , and the fourth driving magnet 324 may be located on the fourth side surface 318 . At this time, the separation distance C1 between the third driving magnet 323 and the fourth driving magnet 324 may correspond to the separation distance A1 between the first driving magnet 321 and the second driving magnet 322. can Meanwhile, the distance D1 between the fourth driving magnet 324 and the first driving magnet 321 may correspond to the distance B1 between the second driving magnet 322 and the third driving magnet 323. can

The second driving unit 320 may include first to fourth driving magnets 321 , 322 , 323 , and 324 . At this time, the first driving magnet 321 and the third driving magnet 323 may be positioned on opposite sides, and the second driving magnet 322 and the fourth driving magnet 324 may be positioned on opposite sides. Also, it may be described that the first driving magnet 321 and the third driving magnet 323 face each other, and the second driving magnet 322 and the fourth driving magnet 324 face each other. The opposing first and third driving magnets 321 and 323 may have the same shape. Similarly, the second and fourth driving magnets 322 and 324 may have the same shape. Meanwhile, all of the first to fourth driving magnets 321, 322, 323, and 324 may have the same shape.

The first magnet 810 may be positioned so as not to face the second driving unit 320 provided as a magnet. That is, the orthographic projection of the first magnet 810 onto the housing 320 may not overlap with the second driving unit 320 . In other words, the first magnet 810 may be disposed to minimize the magnetic force applied to the second driving unit 320 . The first magnet 810 may be located on the third outer circumferential surface 217 of the bobbin 210 as shown in (a) of FIG. 6 . That is, the first magnet 810 may be positioned on the bobbin 210 to face the corner portion 319 of the housing 310 .

The first magnet 810 may be positioned to be spaced apart from the first driving unit 220 in a direction corresponding to an optical axis direction of a lens module coupled to the inside of the bobbin 210 . Meanwhile, the first magnet 810 may be positioned to be spaced apart from the second driving unit 320 in a direction corresponding to the optical axis direction of the lens module.

The first magnet 810 may be located in a seating groove 214 formed in the bobbin 210 . The seating groove 214 may be of a lower open type or an upper open type. At this time, the N pole and the S pole may be located on the upper and lower surfaces of the first magnet 810 . In this case, one of the plurality of first magnets 810 connected so that the N pole and the S pole are alternately positioned is pushed into the upper or lower opening, so that the first magnet 810 is It can be coupled to the seating groove 214. Therefore, in this case, the convenience of a process of coupling the first magnet 810 to each of the plurality of bobbins 210 can be improved. The seating groove 214 may be a vertically closed type formed by partially recessing an outer circumferential surface inwardly. At this time, the N pole and the S pole may be located on the side of the first magnet 810. In this case, the first magnet 810 is inserted into the seating groove 214 by pushing one of the plurality of first magnets 810 from the side so that the N pole and the S pole are alternately positioned. ) can be combined. Therefore, in this case, the convenience of a process of coupling the first magnet 810 to each of the plurality of bobbins 210 can be improved.

Since the second magnet 820 is symmetrically arranged to achieve magnetic force balance or weight balance with the first magnet 810, it may be referred to as a symmetrical magnet or a complementary magnet. The second magnet 820 may be provided to balance the magnetic force with the first magnet 810 . The first magnet 810 and the second magnet 820 may be positioned so that magnetic forces applied to the first driving unit 220 or the second driving unit 320 are balanced. That is, the second magnet 820 may be provided to prevent the first magnet 810 from affecting the electromagnetic interaction between the first to third driving units 220 , 320 , and 420 . Alternatively, even if the first magnet 810 affects the electromagnetic interaction between the first to third driving units 220, 320, and 420, the second magnet 820 compensates for the AF and/or OIS function. It may be provided to secure the performance of.

The first magnet 810 and the second magnet 820 may be positioned to overlap the second driving unit 220 in a horizontal direction. In addition, the first magnet 810 and the second magnet 820 may be positioned so as not to overlap with the second driving unit 220 in the horizontal direction. The first magnet 810 may be positioned to overlap the sensor 910 in a horizontal direction. In addition, the first magnet 810 may be positioned so as not to overlap with the sensor 910 in the horizontal direction. The first magnet 810 and the second magnet 820 may be positioned to overlap the upper support member 610 and/or the lower support member 620 in a vertical direction. In more detail, the first magnet 810 and the second magnet 820 are positioned so as to overlap the connection part 613 of the upper support member 610 and/or the connection part 623 of the lower support member 620 in the vertical direction. can do.

The first magnet 810 and the second magnet 820 may be positioned so that magnetic force applied to the metal cover member 100 is balanced. In addition, the first magnet 810 and the second magnet 820 may be positioned so that magnetic forces applied to the support member 600 made of metal are balanced. That is, the first magnet 810 may be located on one side of the mover 200 and the second magnet 820 may be located on the other side of the first mover 200 . The first magnet 810 and the second magnet 820 may be positioned symmetrically with respect to the center of the bobbin 210 . That is, the first magnet 810 and the second magnet 820 may be positioned symmetrically with respect to the optical axis of the lens module. In other words, the first magnet 810 and the second magnet 820 may be positioned symmetrically with respect to the optical axis of the lens driving unit 10 . The first magnet 810 and the second magnet 820 may have corresponding shapes and sizes. The second magnet 820 may be located in a second magnet seating groove (not shown) located on the outer circumferential surface of the bobbin 210 .

As an example, the second magnet 820 may be provided in plurality. In this case, the plurality of second magnets 820 may be arranged so that the influence of the magnetic force provided by the plurality of second magnets 820 and the first magnet 810 is balanced.

The first magnet 810 and the second magnet 820 may be spaced apart by a distance corresponding to the center of the bobbin 210 . The center of the bobbin 210 may be located on an imaginary line connecting the first magnet 810 and the second magnet 820 . That is, the first magnet 810 and the second magnet 820 may be symmetrically positioned with respect to the center of the bobbin 210 . The first magnet 810 and the second magnet 820 may have corresponding shapes and sizes. The first magnet 810 and the second magnet 820 may be positioned to balance magnetic forces with each other.

The second sensor unit 900 may detect the position of the first magnet 810 . The controller (not shown) may receive the position of the first magnet 810 sensed by the second sensor unit 900 and control power applied to the first driving unit 220 provided as a coil. That is, the position of the first magnet 810 sensed by the second sensor unit 900 may be used to perform the AF feedback function. The second sensor unit 900 may be located at the corner portion 319 of the housing 310 .

The second sensor unit 900 may include a sensor 910 that senses the first magnet 810 and a circuit board 920 on which the sensor 910 is mounted. The sensor 910 may be, for example, a Hall sensor that senses the magnetic force of the magnet. The circuit board 920 may be fixed to the outside of the housing 310 as an example, but is not limited thereto. The circuit board 920 may be directly connected to the circuit board 410 of the stator 400, or may be connected through the side support member 630 and the upper support member 610. The sensor 910 may receive power through the circuit board 920 and communicate a sensing value and a control signal. Meanwhile, the second sensor unit 900 may be positioned to be spaced apart from the second driving unit 320 in a direction corresponding to an optical axis direction of the lens module. That is, the second sensor unit 900 may be positioned to overlap the orthographic projection of the first magnet 810 onto the housing 310 .

Hereinafter, a lens driving unit according to a modified example of the present invention will be described with reference to FIG. 6 .

Referring to (a) of FIG. 6 , in the lens driving unit according to an embodiment of the present invention, the first magnet 810 is separated from the space between the first driving magnet 321 and the second driving magnet 322 and It can be positioned to face. In more detail, the first magnet 810 may be positioned to face the corner portion 319 of the housing 310 . At this time, a virtual line connecting the center of the first driving magnet 321 and the center (X) of the housing 310 and the center of the second driving magnet 322 and the center (X) of the housing 310 are connected. An angle at which the virtual lines meet may be a right angle.

* Referring to (b) of FIG. 6, even in the lens driving unit according to the modified example of the present invention, the first magnet 810 faces the corner portion 319 of the housing 310 as in the previous embodiment. location is the same. However, as shown in (b) of FIG. 6, the first separation distance A2 between the first driving magnet 321 and the second driving magnet 322 is It may be longer than the second separation distance (B2) between (323). That is, the first separation distance A2 of the first separation space facing the first magnet 810 may be longer than the second separation distance B2. In this case, the influence of the magnetic force of the first magnet 810 on the second drive unit 320 can be minimized.

Meanwhile, in the lens driving unit according to the modified example of the present invention, a virtual line connecting the center of the first driving magnet 321 and the center of the housing 310, and the center of the second driving magnet 322 and the housing 310 ) may form an acute angle or an obtuse angle. As an example, as shown in (b) of FIG. 6, a virtual line connecting the center of the first driving magnet 321 and the center of the housing 310, the center of the second driving magnet 322 and the housing ( 310) may be an obtuse angle.

Referring to (c) of FIG. 6 , in the lens driving unit according to another modified example of the present invention, the first magnet 810 may be located on the first outer circumferential surface 215 of the bobbin 210 . At this time, the first magnet 810 may be positioned biased toward the third outer circumferential surface 217 . Even in this case, the projection of the first magnet 810 onto the housing 310 may not overlap with the second driving unit 320 . That is, the first magnet 810 may be positioned to be spaced apart from the second driving unit 320 in the vertical direction (in the optical axis direction of the lens module).

Referring to (d) of FIG. 6 , in the lens driving unit according to another modified example of the present invention, the first magnet 810 may be positioned on the first outer circumferential surface 215 of the bobbin 210 . At this time, the first magnet 810 may be positioned biased toward the third outer circumferential surface 217 . Meanwhile, the second driving unit 320 may include first to fourth driving magnets 321 , 322 , 323 , and 324 . At this time, the first driving magnet 321 and the third driving magnet 323 may be positioned on opposite sides, and the second driving magnet 322 and the fourth driving magnet 324 may be positioned on opposite sides. Also, it may be described that the first driving magnet 321 and the third driving magnet 323 face each other, and the second driving magnet 322 and the fourth driving magnet 324 face each other. In this case, the opposing first and third driving magnets 321 and 323 may have the same shape. Similarly, the second and fourth driving magnets 322 and 324 may have the same shape. However, the first driving magnet 321 may have a shape different from that of the second driving magnet 322 . As an example, the first driving magnet 321 may be smaller than the second driving magnet 322 as shown in (d) of FIG. 6 . More specifically, the first driving magnet 321 may have the same thickness and height as the second driving magnet 322 and may have different widths W1 and W2. As an example, the width W1 of the first driving magnet 321 may be longer than the width W2 of the second driving magnet 322 as shown in (d) of FIG. 6 . That is, the second driving magnet 322 may have a shape in which a part of the width of the first driving magnet 321 is omitted. At this time, the first magnet 810 may be positioned to face the portion where the second driving magnet 322 is omitted. That is, a part of the second driving magnet 322 may be omitted to secure an arrangement space for the first magnet 810 . In this case, the magnetic force exerted by the first magnet 810 on the second driving unit 320 can be minimized.

On the other hand, as shown in (a) to (d) of FIG. 6, in one embodiment and modifications of the present invention, the separation distance between the third driving magnet 323 and the fourth driving magnet 324 ( C1 , C2 , C3 , and C4 may correspond to the separation distances A1 , A2 , A3 , and A4 between the first driving magnet 321 and the second driving magnet 322 . Meanwhile, the distances D1 , D2 , D3 , and D4 between the fourth driving magnet 324 and the first driving magnet 321 are the distance between the second driving magnet 322 and the third driving magnet 323 . It may correspond to the distances B1, B2, B3, and B4.

Hereinafter, the operation and effect of the camera module according to an embodiment of the present invention will be described with reference to the drawings.

First, an auto focus function of a camera module according to an embodiment of the present invention will be described. When power is supplied to the first driving unit 220 provided as a coil, the first driving unit 220 is operated by the second driving unit 220 due to electromagnetic interaction between the first driving unit 220 and the second driving unit 320 provided as a magnet. The movement is performed with respect to (320). At this time, the bobbin 210 to which the first driving unit 220 is coupled moves integrally with the first driving unit 220 . That is, the bobbin 210 coupled to the inside of the lens module moves in the vertical direction with respect to the housing 310 . Such movement of the bobbin 210 results in the lens module moving closer to or farther from the image sensor, so focus adjustment is performed on the subject.

Meanwhile, auto focus feedback may be applied to more precisely realize the auto focus function of the camera module according to an embodiment of the present invention. In more detail, the first magnet 810 mounted on the bobbin 210 may be detected by the second sensor unit 900 . Meanwhile, when the bobbin 210 moves relative to the housing 310, the amount of the magnetic field sensed by the second sensor unit 900 changes. The second sensor unit 900 detects the movement amount or position of the bobbin 210 in the z-axis direction in this way and transmits the detected value to the control unit. The control unit determines whether or not to additionally move the bobbin 210 through the received sensing value. Since this process occurs in real time, the auto focus function of the camera module according to an embodiment of the present invention can be performed more precisely through auto focus feedback.

A hand shake correction function of the camera module according to an embodiment of the present invention will be described. When power is supplied to the third driving unit 420, the second driving unit 320 moves relative to the third driving unit 420 due to electromagnetic interaction between the third driving unit 420 and the second driving unit 320 provided as a magnet. will perform the move. At this time, the housing 310 to which the second driving unit 320 is coupled moves integrally with the second driving unit 320 . That is, the housing 310 moves in a horizontal direction with respect to the base 500 . Meanwhile, a tilt of the housing 310 with respect to the base 500 may be induced. Such movement of the housing 310 results in movement of the lens module in a direction parallel to the direction in which the image sensor is placed with respect to the image sensor, so that the hand shake correction function is performed.

Meanwhile, hand shake correction feedback may be applied to more accurately realize the hand shake correction function of the camera module according to an embodiment of the present invention. The pair of first sensor units 700 mounted on the base 500 and provided as hall sensors sense the magnetic field of the second driving unit 320 provided as a magnet fixed to the housing 310 . Meanwhile, when the housing 310 moves relative to the base 500, the amount of the magnetic field sensed by the first sensor unit 700 changes. The pair of first sensor units 700 detect movement amounts or positions of the housing 310 in the horizontal direction (x-axis and y-axis directions) in this manner and transmit the detected values to the control unit. The control unit determines whether or not to additionally move the housing 310 through the received sensing value. Since this process occurs in real time, the hand shake correction function of the camera module according to an embodiment of the present invention can be performed more precisely through hand shake correction feedback.

In the camera module according to one embodiment and modifications of the present invention, a first magnet 810 and a second sensor unit 900, which are structures for detecting the position of the bobbin 210 for performing an AF feedback function, are provided. Meanwhile, a second magnet 820 is provided to balance the magnetic force with the first magnet 810 . In addition, an overlap prevention structure between the first magnet 810 and the second driving unit 320 provided as a magnet is provided.

Through the above-mentioned structure, the camera module according to the exemplary embodiment and modifications of the present invention may provide a more precise autofocus function by providing an autofocus feedback function.

In the above, even though all the components constituting the embodiment of the present invention have been described as being combined or operated as one, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all of the components may be selectively combined with one or more to operate. In addition, terms such as "include", "comprise" or "have" described above mean that the corresponding component may be present unless otherwise stated, and thus exclude other components. It should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related art, and unless explicitly defined in the present invention, they are not interpreted in an ideal or excessively formal meaning.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: cover member 200: first mover
300: second mover 400: stator
500: base 600: support member
700: first sensor unit 810: first magnet
820: second magnet 900: second sensor unit

Claims (21)

A cover member including a side plate;
a bobbin disposed within the cover member;
a coil disposed on the bobbin;
a drive magnet disposed between the side plate of the cover member and the coil;
a first magnet disposed on the bobbin;
a second magnet disposed on the bobbin;
a circuit board disposed between the side plate of the cover member and the bobbin; and
A sensor disposed on the circuit board;
The second magnet overlaps the first magnet in a first direction perpendicular to the optical axis;
The lens driving device of claim 1 , wherein the first magnet does not overlap with the driving magnet in the first direction. According to claim 1,
The first magnet is disposed spaced apart from the coil in the direction of the optical axis. According to claim 1,
The circuit board includes a first area overlapping the side plate of the cover member in a direction perpendicular to the optical axis, and a second area not overlapping the side plate of the cover member in a direction perpendicular to the optical axis,
A lens driving device in which a plurality of terminals are disposed in the second region of the circuit board. According to claim 1,
A housing disposed between the cover member and the bobbin;
The driving magnet is disposed in the housing,
The circuit board is disposed between the side plate of the cover member and the housing. According to claim 1,
And a base coupled to the side plate of the cover member,
A lens driving device wherein a portion of the circuit board is disposed on a side plate of the base. According to claim 1,
The side plates of the cover member include first and third side plates opposite each other and second and fourth side plates opposite each other,
The driving magnet includes a first driving magnet disposed between the coil and the second side plate, and a second driving magnet disposed between the coil and the fourth side plate,
The first magnet is disposed between the bobbin and the first side plate,
The second magnet is disposed between the bobbin and the third side plate. According to claim 1,
The side plates of the cover member include first and third side plates opposite each other and second and fourth side plates opposite each other,
The driving magnets include a first driving magnet disposed at a position corresponding to the second side plate, a second driving magnet disposed at a position corresponding to the fourth side plate, and a third driving magnet disposed at a position corresponding to the first side plate. contains a magnet,
Each of the first driving magnet and the third driving magnet includes an inner surface facing the coil,
A first width of the inner surface of the first driving magnet in a second direction perpendicular to the optical axis is smaller than a first width of the inner surface of the third driving magnet in a third direction perpendicular to the optical axis and the second direction. lens drive unit. According to claim 7,
The cover member is disposed between a first corner disposed between the first side plate and the second side plate, a second corner disposed between the second side plate and the third side plate, and disposed between the third side plate and the fourth side plate. A third corner and a fourth corner disposed between the first side plate and the fourth side plate,
The sensor is disposed closer to the fourth corner than the first corner,
The third driving magnet is disposed closer to the first corner than the fourth corner,
The first driving magnet is disposed closer to the first corner than to the second corner. According to claim 1,
The first magnet is symmetrical to the second magnet with respect to the optical axis. According to claim 1,
The driving magnet is fixed to the side plate of the cover member. According to claim 1,
Including an elastic member coupled to the bobbin,
The elastic member includes an upper elastic member and a lower elastic member disposed under the elastic member,
The lower elastic member includes two lower elastic members spaced apart from each other,
The coil is a lens driving device electrically connected to the two lower elastic members. According to claim 1,
The bobbin includes a first groove and a second groove spaced apart from the first groove,
The first magnet is disposed in the first groove,
The second magnet is disposed in the second groove. According to claim 1,
The first direction is symmetrical with respect to the optical axis,
The sensor is disposed between the first magnet and the circuit board. According to claim 1,
The circuit board includes the flexible circuit board,
The sensor is a lens driving device including a hall sensor. A cover member including a side plate;
a bobbin disposed on the cover member;
a coil disposed on the bobbin;
a driving magnet disposed between the coil and the side plate of the cover member;
an elastic member coupled to the bobbin;
a first magnet disposed on the bobbin;
a second magnet disposed on the bobbin;
a circuit board disposed between the side plate of the cover member and the bobbin; and
A sensor disposed on the circuit board;
The side plate of the cover member includes a first side plate, a third side plate overlapping the first side plate in a first direction perpendicular to the optical axis, a second side plate, and a second direction perpendicular to the optical axis and the first direction. Including a fourth side plate overlapping the second side plate,
The driving magnet includes a first driving magnet disposed between the second side plate and the coil, and a second driving magnet disposed between the fourth side plate and the coil,
The first magnet is disposed between the first side plate and the bobbin,
The second magnet is disposed between the third side plate and the bobbin,
A part of the circuit board is disposed between the bobbin and the cover member. According to claim 15,
The circuit board includes a first area overlapping the third side plate of the cover member in the first direction, and a second area not overlapping the third side plate of the cover member in the first direction;
A lens driving device in which a plurality of terminals are disposed in the second region of the circuit board. According to claim 16,
The first magnet is disposed symmetrically with the second magnet with respect to the optical axis. printed circuit board;
an image sensor disposed on the printed circuit board;
The lens driving device according to any one of claims 1 to 17; and
A camera module including a lens coupled to the bobbin of the lens driving device and disposed at a position corresponding to the image sensor. A mobile phone comprising the camera module of claim 18. A cover member including a side plate;
a housing disposed on the cover member;
a bobbin disposed in the housing;
a coil disposed on the bobbin;
a drive magnet disposed between the side plate of the cover member and the coil;
an elastic member coupled to the housing and the bobbin;
a first magnet disposed on the bobbin;
a second magnet disposed on the bobbin;
a circuit board disposed between the side plate of the cover member and the housing; and
A sensor disposed on the circuit board;
The side plates of the cover member include a first side plate, a third side plate overlapping the first side plate in a first direction perpendicular to the optical axis, a second side plate, and a second direction perpendicular to the optical axis and the first direction. Including a fourth side plate overlapping the second side plate,
The first magnet is disposed symmetrically with the second magnet with respect to the optical axis,
The circuit board includes a first area overlapping the third side plate of the cover member in the first direction, a second area not overlapping the third side plate of the cover member in the first direction, and the second area A lens driving device comprising a terminal unit disposed on the. A cover member including a side plate;
a housing disposed on the cover member;
a bobbin disposed in the housing;
a coil disposed on the bobbin;
a drive magnet disposed between the side plate of the cover member and the coil;
an elastic member coupled to the housing and the bobbin;
a first magnet disposed on the bobbin;
a second magnet disposed on the bobbin;
a circuit board disposed between the side plate of the cover member and the housing; and
A lens driving device including a sensor disposed on the circuit board.

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