KR102662734B1 - Lens driving unit, camera module and optical apparatus - Google Patents

Abstract

The present invention includes: a first movable part; A bobbin where the first movable part is located; a second movable part positioned to face the first movable part; a housing located outside the bobbin and having a second movable portion; and a support member coupled to the bobbin and the housing and movably supporting the bobbin with respect to the housing, wherein the bobbin includes a support part formed on an outer peripheral surface and supporting the first movable part, and the support member. relates to a lens driving unit including a plurality of supports positioned to be spaced apart from each other along the outer circumference of the bobbin.
Through the present invention, the performance of the AF or OIS function can be secured and the oscillation phenomenon at the resonance point can be prevented.

Description

Lens driving unit, camera module and optical apparatus}

This embodiment relates to a lens drive unit, camera module, and optical equipment.

As various types of portable terminals become widespread and wireless Internet services become commercialized, consumer demands related to portable terminals are also diversifying, and various types of additional devices are being installed on portable terminals.

Among them, a representative one is a camera module that takes photos or videos of a subject.

Recently, camera modules equipped with an autofocus (AF) function or an optical image stabilization (OIS) function are being used. Meanwhile, in the camera module with the mentioned AF or OIS function, an elastic member is required to move the lens with respect to the image sensor.

Meanwhile, in the internal structure of a camera module equipped with a conventional AF or OIS function, there is a problem of not securing a sufficient length of the elastic member due to space constraints. In particular, the elastic member in a conventional camera module has a problem with oscillation at the resonance point.

(Patent Document 1) KR 10-2013-0125476 A

In order to solve the above-mentioned problem, it is intended to provide a lens driving unit that secures a sufficient length of the elastic member. In addition, it is intended to provide a lens driving unit to which a wide and long elastic member can be applied.

In addition, it is intended to provide a camera module and optical device that secures the performance of the AF or OIS function and prevents oscillation at the resonance point by using the lens driving unit.

In order to solve the above-described problem, a lens driving unit according to an embodiment of the present invention includes a first moving part; A bobbin where the first movable part is located; a second movable part positioned to face the first movable part; a housing located outside the bobbin and having a second movable portion; and a support member coupled to the bobbin and the housing and movably supporting the bobbin with respect to the housing, wherein the bobbin includes a support part formed on an outer peripheral surface and supporting the first movable part, and the support member. may include a plurality of supports positioned to be spaced apart from each other along the outer circumference of the bobbin.

A separation space is formed between the plurality of supports, and the support member may be located in the separation space.

The support member includes an inner part coupled to the bobbin, an outer part coupled to the housing, and a connection part connecting the inner part and the outer part, and the connection part may be located in the space.

The support member includes four support units located in a single virtual plane, and any one of the four support units includes a first inner part coupled to the bobbin, a first outer part coupled to the housing, and the It may include a first connection part connecting the first inner part and the first outer part.

The first connection part includes a plurality of bent parts that are bent or curved, and two or more of the plurality of bent parts may be located in the space.

The separation space is provided in plurality, and at least a part of the first connection part may be located in two or more of the plurality of separation spaces.

The plurality of supports includes a first support, a second support positioned adjacent to the first support, and a third support positioned adjacent to the second support, and the separation space includes the first support. and a first separation space located between the second supports, and a second separation space located between the second support and the third support, wherein at least a portion of the first connection part is formed in the first separation space. and may be located in the second space.

The housing includes a first housing edge portion formed by meeting side surfaces, and a second housing edge portion positioned adjacent to the first housing edge portion, and the first outer portion is positioned closer to the first housing edge portion than the second housing edge portion. It is located closer to the housing edge portion, and the first inner portion may be located closer to the second housing edge portion than the first housing edge portion.

The space may be spaced apart from each of the first housing edge portion and the second housing edge portion by a corresponding distance.

The plurality of supports includes eight supports, and eight spaced spaces may be formed between the eight supports.

The support member includes an upper support member connecting an upper part of the bobbin and an upper part of the housing, and a lower support member connecting a lower part of the bobbin and a lower part of the housing, and a separation space is provided between the plurality of supports. is formed, and a lower support member may be located in the space.

The first movable unit includes a coil having a pair of lead wires, and the lower support members are provided as a pair, and each of the pair of lower support members may be electrically connected to each of the pair of lead wires. .

The bobbin is provided with a sensor unit that detects the amount of movement or position of the bobbin with respect to the housing, the upper support member is connected to the sensor unit, and the upper support member is spaced apart from at least six separate ends, Four of the six separation stages may be electrically connected to the sensor unit, and the remaining two separation stages may be electrically connected to the lower support member.

a base supporting the housing from the lower side; and a cover member coupled to the upper side of the base and accommodating the bobbin and the housing inside, and the support member may be spaced apart from the cover member.

It is located between the housing and the base and may further include a third movable part that selectively moves the second movable part through electromagnetic interaction with the second movable part.

A camera module according to an embodiment of the present invention includes a lens module; A first movable member including a first movable portion and a bobbin on which the first movable portion is located on an outer peripheral surface and the lens module is coupled to an inner peripheral surface; a second movable unit including a second movable unit positioned to face the first movable unit, a housing in which the second movable unit is located, and a second movable unit located outside the first movable unit; and a support member coupled to the bobbin and the housing and movably supporting the bobbin with respect to the housing, wherein the bobbin includes a movable part coupling part formed on an outer peripheral surface and where the first movable part is located, and the movable part. It extends from the coupling part and includes a support part supporting the first movable part, wherein the support part includes a plurality of supports positioned to be spaced apart from each other along the outer circumference of the bobbin, and the support member is positioned between the plurality of supports. can do.

An optical device according to an embodiment of the present invention includes a main body, a display unit disposed on one side of the main body to display information, and a camera module installed in the main body to capture images or photos, the camera module Silver, first movable region; A bobbin where the first movable part is located; a second movable part positioned to face the first movable part; a housing located outside the bobbin and having a second movable portion; and a support member coupled to the bobbin and the housing and movably supporting the bobbin with respect to the housing, wherein the bobbin includes a movable part coupling part formed on an outer peripheral surface and where the first movable part is located, and the movable part. It extends from the coupling part and includes a support part supporting the first movable part, wherein the support part includes a plurality of supports positioned to be spaced apart from each other along the outer circumference of the bobbin, and the support member is positioned between the plurality of supports. can do.

Through the present invention, the performance of the AF or OIS function can be secured and the oscillation phenomenon at the resonance point can be prevented.

1 is a perspective view showing a lens driving unit according to an embodiment of the present invention.
Figure 2 is an exploded perspective view showing a lens driving unit according to an embodiment of the present invention.
Figure 3 is a bottom view showing a partial configuration of a lens driving unit according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view taken along line XX' of FIG. 3.

Hereinafter, some embodiments of the present invention will be described in detail through illustrative drawings. When adding reference numerals to components in each drawing, it should be noted that identical components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted.

Additionally, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term. When a component is described as being “connected,” “coupled,” or “connected” to another component, that component may be directly connected or connected to that other component, but there is no need for another component between each component. It should be understood that may be “connected,” “combined,” or “connected.”

“PCB” used below is an abbreviation for Printed Circuit Board and refers to a printed circuit board. In addition, “FPCB” used below is an abbreviation for Flexible Printed Circuit Board and refers to a flexible printed circuit board.

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

Optical devices according to an embodiment of the present invention include mobile phones, mobile phones, smart phones, portable smart devices, digital cameras, laptop computers, digital broadcasting terminals, PDAs (Personal Digital Assistants), and PMPs (Personal Digital Assistants). Portable Multimedia Player), navigation, etc., but is not limited thereto, and any device for taking videos or photos can be used.

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 side of the main body to display information, and a camera installed in the main body to capture images or photos. It may include a camera (not shown) having a module (not shown).

Below, 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-off filter (not shown), a printed circuit board (not shown), an image sensor (not shown), and a control unit (not shown). You can.

The lens module may include one or more lenses (not shown) and a lens barrel that accommodates the one or more lenses. However, the configuration of the lens module is not limited to the lens barrel, and any holder structure that can support one or more lenses is possible. The lens module is coupled to the lens driving unit 10 and can move together with the lens driving unit 10. The lens module may be screwed together with the lens drive 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.

An infrared cut-off filter can block light in the infrared region from entering the image sensor. As an example, an infrared cut-off filter may be located between the lens module and the image sensor. The infrared cut-off filter may be installed on the base 500, which will 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. In one embodiment, the infrared filter may be made of a film material or a glass material. Meanwhile, an infrared filter 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, as an example.

The printed circuit board may support the lens driving unit 10. An image sensor may be mounted on a printed circuit board. In more detail, the lens driving unit 10 may be located outside the upper surface of the printed circuit board, and an image sensor may be located inside the upper surface of the printed circuit board. Through this structure, light passing through the lens module coupled to the inside of the lens driving unit 10 can be irradiated to an image sensor mounted on a printed circuit board. The printed circuit board can 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 so that its optical axis coincides with the lens module. Through this, the image sensor can acquire light that has passed through the lens module. An image sensor can output irradiated light as an image. The image sensor may be, for example, a charge coupled device (CCD), a metal oxide semiconductor (MOS), a CPD, and a CID. However, the type of image sensor is not limited to this.

The control unit may be mounted on a printed circuit board. Meanwhile, the control unit may be located inside the lens driving unit 10. The control unit can control the direction, intensity, and amplitude of the current supplied to each component of the lens driving unit 10. The control unit may control the lens driving unit 10 to perform one or more of the autofocus function and the image stabilization function of the camera module. That is, the control unit controls the lens driving unit 10 to move the lens module in the optical axis direction, or to move or tilt the lens module in a direction perpendicular to the optical axis direction. Furthermore, the control unit can perform feedback control of the autofocus function and image stabilization function.

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

FIG. 1 is a perspective view showing a lens driving unit according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a lens driving unit according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. It is a bottom view showing a partial configuration of the lens driving unit according to , and FIG. 4 is a cross-sectional view seen along line XX' of FIG. 3.

1 to 4, the lens driving unit 10 according to an embodiment of the present invention includes a cover member 100, a first movable member 200, a second movable member 300, and a stator 400. , may include a base 500, a support member 600, and a sensing unit 700. However, the lens driving unit 10 according to an embodiment of the present invention includes a cover member 100, a first movable member 200, a second movable member 300, a stator 400, a base 500, and a support member. One or more of the member 600 and the sensing 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 to this. The cover member 100 may include an upper surface 101 and a side surface 102 extending downward from the outside of the upper surface 101. Meanwhile, the cover member 100 may be mounted on the top of the base 500. The first movable member 200, the second movable member 300, the stator 400, and the support member 600 may be located in the internal space formed by the cover member 100 and the base 500. Additionally, the cover member 100 may be mounted on the base 500 with its inner surface in close contact with some or all of the side surfaces of the base 500, which will be described later. Through this structure, the cover member 100 can protect internal components from external impact and at the same time have a function of preventing penetration of external contaminants.

As an example, the cover member 100 may be made of a metal material. In more detail, the cover member 100 may be made of a metal plate. In this case, the cover member 100 can block radio interference. That is, the cover member 100 can block radio waves generated outside the lens driving unit 10 from flowing into the inside of the cover member 100. Additionally, 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 be provided in a shape corresponding to the lens module. That is, 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 movable member 200 may include a bobbin 210 and a first movable part 220. The first movable member 200 may be combined with a lens module, which is a component of a camera module. That is, the lens module may be located inside the first movable member 200. In other words, the outer circumferential surface of the lens module may be coupled to the inner circumferential surface of the first movable member 200. Meanwhile, the first movable member 200 can flow integrally with the lens module through interaction with the second movable member 300. That is, the first movable person 200 can move the lens module.

The first movable member 200 may include a bobbin 210. Additionally, the first movable member 200 may include a first movable part 220 coupled to the bobbin 210.

Bobbin 210 may be combined with a lens module. In more detail, the outer peripheral surface of the lens module may be coupled to the inner peripheral surface of the bobbin 210. Meanwhile, the first movable part 220 may be coupled to the bobbin 210. Additionally, the lower part of the bobbin 210 may be coupled to the lower support member 900, 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 move relative to the housing 310 .

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

The bobbin 210 may include a sensor guide portion 212 to which the first sensor unit 710 is coupled. A sensor guide portion 212 provided in a shape corresponding to the first sensor unit 710 may be provided on the outer peripheral surface of the bobbin 210. That is, the first sensor unit 710 may be coupled to the sensor guide unit 212. The first sensor unit 710 coupled to the sensor guide unit 212 moves integrally with the bobbin 210 and detects the second movable unit 320 mounted on the housing 310 to control the movement of the bobbin 210. It can be sensed.

The bobbin 210 may include a first movable part coupling portion 810 on which the first movable part 220 is wound or mounted. The first movable part coupling part 810 may be formed integrally with the outer surface of the bobbin 210. Additionally, the first movable part coupling portion 810 may be formed continuously along the outer surface of the bobbin 210 or may be formed spaced apart at predetermined intervals. The first movable part coupling part 810 may include a recess formed by recessing a portion of the outer surface of the bobbin 210. The first movable part 220 may be located in the first movable part coupling part 810, and the first movable part 220 located in the first movable part coupling part 810 may be supported by the support part 820.

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 coupling portion 615 of the upper support member 610. As an example, the upper coupling portion 213 provided as a protrusion may be inserted and coupled to the inner coupling portion 615 provided as a groove. Meanwhile, the upper support member 610 may be provided with a protrusion and the bobbin 210 may be provided with a groove so that the two may be combined. As an example, the bobbin 210 may be provided with a total of four upper coupling portions 213 as shown in FIG. 2 . Meanwhile, the bobbin 210 may include a lower coupling portion 214 coupled to the lower support member 900. The lower coupling portion 214 formed at the lower portion of the bobbin 210 may be coupled to the inner coupling portion 915 of the lower support member 900. As an example, the lower coupling portion 214 provided as a protrusion may be inserted and coupled to the inner coupling portion 915 provided as a groove.

The first movable part 220 may be positioned opposite to the second movable part 320 of the second movable member 300. The first movable part 220 can move the bobbin 210 with respect to the housing 310 through electromagnetic interaction with the second movable part 320. The first movable part 220 may include a coil. The coil may be guided by the first movable part coupling portion 810 and wound on the outer surface of the bobbin 210. Additionally, in another embodiment, the coil may be provided independently of four coils and disposed on the outer surface of the bobbin 210 so that two adjacent coils form an angle of 90° to each other. When the first movable part 220 includes a coil, power supplied to the coil may be supplied through the lower support member 900. At this time, the lower support member 900 may be provided separately as a pair to supply power to the coil. Meanwhile, the first movable part 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 movable part 220 may be electrically coupled to each of the pair of lower support members 900. Meanwhile, when power is supplied to the coil, an electromagnetic field may be formed around the coil. Additionally, in another embodiment, the first movable part 220 may include a magnet. In this case, the second movable part 320 may be provided as a coil.

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

The second movable member 300 may include a housing 310 located outside the bobbin 210. Additionally, the second movable member 300 may include a second movable part 320 that is positioned opposite to the first movable part 220 and is fixed to the housing 310.

The housing 310 may be formed in a shape corresponding to the inner surface of the cover member 100 that forms the exterior of the lens driving unit 10. Additionally, the housing 310 is made of an insulating material and may be made of an injection molded product considering productivity. The housing 310 is a movable part for OIS (Optical Image Stabilization) operation and may be placed at a certain distance from the cover member 100. However, in the AF model, the housing 310 may be fixed on the base 500. Additionally, in the AF model, the housing 310 is omitted and the magnet provided as the second movable part 320 may be fixed to the cover member 100.

The upper and lower sides of the housing 310 are open so that the first movable member 200 can be moved up and down. The housing 310 may include an inner space 311 that is open at the top and bottom. The first movable member 200 may be movably positioned in the inner space 311. That is, the inner space 311 may be provided in a shape corresponding to the first movable member 200. Additionally, the outer peripheral surface of the inner space 311 may be positioned spaced apart from the outer peripheral surface of the first movable member 200.

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

An upper support member 610 may be coupled to the upper part of the housing 310, and a lower support member 900 may be coupled to the lower part 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 coupling portion 614 of the upper support member 610. As an example, the upper coupling portion 313 provided as a protrusion may be inserted and coupled to the outer coupling portion 614 provided as a groove or hole. Meanwhile, in another embodiment, the upper support member 610 may be provided with a protrusion and the housing 310 may be provided with a groove so that the two may be combined. Meanwhile, the housing 310 may include a lower coupling portion 314 coupled to the lower support member 900. The lower coupling portion 314 formed in the lower portion of the housing 310 may be coupled to the outer coupling portion 914 of the lower support member 900. As an example, the lower coupling portion 314 provided as a protrusion may be inserted and coupled to the outer coupling portion 914 provided as a groove or hole.

The second movable part 320 may be positioned opposite to the first movable part 220 of the first movable member 200. The second movable part 320 can move the first movable part 220 through electromagnetic interaction with the first movable part 220 . The second movable part 320 may include a magnet. The magnet may be fixed to the second movable part coupling portion 312 of the housing 310. As an example, the second movable part 320 may be provided with four magnets independently as shown in FIG. 2 and may be arranged in the housing 310 such that two adjacent magnets form an angle of 90° to each other. That is, the second movable part 320 is mounted on the four sides of the housing 310 at equal intervals to ensure efficient use of the internal volume. Additionally, the second movable part 320 may be attached to the housing 310 using an adhesive or the like, but is not limited thereto. Meanwhile, the first movable part 220 may include a magnet and the second movable part 320 may be provided as a coil.

The stator 400 may be positioned to face the lower side of the second movable member 300 . Meanwhile, the stator 400 can move the second movable member 300. Additionally, through holes 411 and 421 corresponding to the lens module may be located in the center of the stator 400.

The stator 400 may include a circuit board 410 located between the third movable part 420 and the base 500. Additionally, the stator 400 may include a third movable part 420 positioned opposite to the lower side of the second movable part 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 located between the third movable part 420 and the base 500. Meanwhile, the circuit board 410 can supply power to the third movable part 420. Additionally, the circuit board 410 may supply power to the first sensor unit 710 through the lateral support member 630 and the upper support member 610. In addition, the circuit board 410 can supply power to the first movable part 220 through the lateral support member 630, the upper support member 610, the connecting member 640, and the lower support member 900. The circuit board 410 may be provided with a through hole 411 through which light passing through the lens module passes. Additionally, 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, and power may be supplied to the circuit board 410 through this.

The third movable part 420 may include a coil. When power is applied to the coil of the third movable part 420, the second movable part 320 and the housing 310 to which the second movable part 320 is fixed can be moved as one due to interaction with the second movable part 320. there is. The third movable part 420 may be mounted on or electrically connected to the circuit board 410. Meanwhile, the third movable part 420 may be provided with a through hole 421 through which light from 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 moving part 420 is formed of an FP coil, which is a patterned coil, and is attached to the circuit board. It may be placed or mounted at 410.

The base 500 may support the second movable member 300. A printed circuit board may be located on the lower side of the base 500. The base 500 may include a hollow hole 510 formed at a position corresponding to the lens coupling portion 211 of the bobbin 210. The base 500 can perform a sensor holder function to protect the image sensor. Meanwhile, an infrared ray filter may be located in the base 500. An infrared filter may be coupled to the hollow hole 510 of the base 500.

As an example, the base 500 may include a foreign matter collecting unit 520 that collects foreign matter flowing 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 substances on the inner space formed by the cover member 100 and the base 500, including adhesive materials. The base 500 may include a sensor mounting portion 530 to which the second sensor 720 is coupled. That is, the second sensor 720 can be mounted on the sensor mounting unit 530. At this time, the second sensor 720 can detect the horizontal movement of the housing 310 by detecting the second movable part 320 coupled to the housing 310. As an example, two sensor mounting units 530 may be provided. A second sensor 720 may be located in each of the two sensor mounting units 530. In this case, the second sensor 720 may be arranged to detect movement of the housing 310 in both the x-axis and y-axis directions.

The support member 600 may connect any two or more of the first movable member 200, the second movable member 300, and the base 500. The support member 600 can elastically connect any two or more of the first movable member 200, the second movable member 300, and the base 500 to enable relative movement between each component. there is. That is, the support member 600 may be provided as an elastic member. As an example, the support member 600 may include an upper support member 610, a lower support member 900, a lateral support member 630, and an energizing member 640, as shown in FIG. 2. However, the energizing member 640 may be provided solely for energizing the upper support member 610 and the lower support member 900.

The upper support member 610 may include, as an 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 connection 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 the upper part of the first movable member 200 and the upper part of the second movable member 300. In more detail, the upper support member 610 may be coupled to the upper part of the bobbin 210 and the upper part of the housing 310. The upper support member 610 may include an outer coupling portion 614 and an inner coupling portion 615. The inner coupling portion 615 of the upper support member 610 is coupled to the upper coupling portion 213 of the bobbin 210, and the outer coupling portion 614 of the upper support member 610 is coupled to the upper coupling portion of the housing 310. It can be combined with part 313.

In one embodiment, the upper support member 610 may be provided separately into six pieces. At this time, two of the six upper support members 610 are connected to the lower support member 900 and can be used to apply power to the first movable part 220. Each of the two upper support members 610 may be electrically connected to each of the pair of lower support members 901 and 902 through an energizing member 640. Meanwhile, the remaining four of the six upper support members 610 may be used to supply power to the first sensor unit 710 and to transmit and receive information or signals between the control unit and the first sensor unit 710. .

The lower support member 900 may include a pair of lower support members 901 and 902, as an example. That is, the lower support member 900 may include a first lower support member 901 and a second lower support member 902. Each of the first lower support member 901 and the second lower support member 902 can be connected to each of a pair of lead wires of the first movable part 220 provided as a coil to supply power. Meanwhile, the pair of lower support members 900 may be electrically connected to the circuit board. Through this structure, the pair of lower support members 900 can provide power supplied from the circuit board to the first movable part 220.

The lower support member 900 may include, as an example, an outer portion 911, an inner portion 912, and a connection portion 913. The lower support member 900 includes an outer portion 911 coupled to the housing 310, an inner portion 912 coupled to the bobbin 210, and a connection portion elastically connecting the outer portion 911 and the inner portion 912 ( 913) may be included.

The lower support member 900 may be connected to the lower part of the first movable member 200 and the lower part of the second movable member 300. In more detail, the lower support member 900 may be coupled to the lower part of the bobbin 210 and the lower part of the housing 310. The lower support member 900 may include an outer coupling portion 914 and an inner coupling portion 915. The lower coupling portion 214 of the bobbin 210 is coupled to the inner coupling portion 915 of the lower support member 900, and the lower coupling portion of the housing 310 is coupled to the outer coupling portion 914 of the lower support member 900. Parts 314 may be combined.

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

In one embodiment, the lateral support members 630 may be provided in the same number as the upper support members 610. 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 number. In this case, the lateral support member 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 lateral support members 630 may be determined by considering symmetry. In one embodiment, eight lateral support members 630 may be provided, two at each corner of the housing 310, as shown in FIG. 2.

The lateral support member 630, as an example, is coupled to the upper support member 610 and may include a structure for shock absorption. The structure for absorbing the shock may be provided in one or more of the lateral support member 630 and the upper support member 610. The component for absorbing the shock may be a separate member such as a damper. Additionally, the configuration for absorbing shock may be realized by changing the shape of either the lateral support member 630 or the upper support member 610.

The current conducting member 640 may electrically connect the upper support member 610 and the lower support member 900. The electricity-conducting member 640 may be provided separately from the lateral support member 630. Power supplied to the upper support member 610 through the conductive member 640 is supplied to the lower support member 900, and power may be supplied to the first movable part 220 through the lower support member 900.

The sensor unit 700 may be used for one or more of auto focus (AF) feedback and optical image stabilization (OIS) feedback. That is, the sensor unit 700 can detect the position or movement of one or more of the first movable member 200 and the second movable member 300. The sensor unit 700 may include a first sensor unit 710 and a second sensor 720 as an example. The first sensor unit 710 may provide information for AF feedback by sensing the relative upward and downward movement of the bobbin 210 with respect to the housing 310. The second sensor 720 may detect horizontal movement or tilt of the second movable person 300 and provide information for OIS feedback.

The first sensor unit 710 may be located in the first movable member 200. In more detail, the first sensor unit 710 may be located on the bobbin 210. The first sensor unit 710 may be inserted into and fixed to the second guide portion 212 formed on the outer peripheral surface of the bobbin 210. As an example, the first sensor unit 710 may include a first sensor 711, a flexible printed circuit board 712, and a terminal portion 713.

The first sensor 711 can detect the movement or position of the bobbin 210. Additionally, the first sensor 711 can detect the position of the second movable part 320 mounted on the housing 310. The first sensor 711 may be a Hall sensor as an example. The first sensor 711 can sense the relative position between the bobbin 210 and the housing 310 by detecting the magnetic force generated from the second moving part 320.

The first sensor 711 may be fixed to the flexible circuit board 712. As an example, the flexible circuit board 712 may be provided in a strip shape as shown in FIG. 2 . At least a portion of the flexible circuit board 712 may be provided in a shape corresponding to the sensor guide part 212 of the bobbin 210 and inserted into the sensor guide part 212. The flexible circuit board 712 may be an FPCB as an example. That is, the flexible circuit board 712 is flexible and can be bent to correspond to the shape of the sensor guide 212. A terminal portion 713 may be formed on the flexible circuit board 712.

The terminal unit 713 can receive power and supply power to the first sensor 711 through the flexible circuit board 712. Additionally, the terminal unit 713 may receive a control command for the first sensor 711 or transmit a value sensed from the first sensor 711. In one embodiment, there are four terminal units 713 and can be electrically connected to the upper support member 610. In this case, the two terminal units 713 may be used to receive power from the upper support member 610, and the remaining two terminal units 713 may be used to transmit and receive information or signals.

The second sensor 720 may be located on the stator 400. The second sensor 720 may be located on the upper or lower surface of the circuit board 410 of the stator 400. In one embodiment, the second sensor 720 may be located on the sensor mounting portion 530 formed on the base 500 and disposed on the lower surface of the circuit board. The second sensor 720 may include a Hall sensor as an example. In this case, the relative movement of the second movable member 300 with respect to the stator 400 can be sensed by sensing the magnetic field of the second movable part 320 of the second movable member 300. As an example, the second sensor 720 is provided in two or more pieces and can detect both the x-axis and y-axis movements of the second movable person 300.

The bobbin 210 is formed on the outer peripheral surface and may include a first movable part coupling part 810 where the first movable part 220 is located. That is, the first movable part 220 may be coupled to the first movable part coupling part 810. The first movable part coupling portion 810 may be formed by the outer peripheral surface of the bobbin 210 being depressed inward.

The bobbin 210 may include a support portion 820 that extends from the first movable portion coupling portion 810 and supports the first movable portion 220. That is, the support part 820 can support the first movable part 220 on one side. As an example, the support part 820 may extend below and outside the first movable part coupling part 810 to support the lower end of the first movable part 220.

The support portion 820 may include a plurality of supports 821, 822, and 823 positioned to be spaced apart from each other along the outer circumference of the bobbin 210. The support portion 820 may be provided in a stepped manner to support the lower end of the first movable portion 220. A separation space 830 may be formed between the plurality of supports 821, 822, and 823. Meanwhile, a support member 600 may be located in the separation space 830. In more detail, the lower support member 900 may be located in the space 830. As shown in FIG. 3, the supports 821, 822, and 823 have a shape that protrudes from the lower surface of the bobbin 210 in the direction toward the housing 310 and may be referred to as a 'protruding area'.

The lower support member 900 includes an inner part 912 coupled to the bobbin 210, an outer part 911 coupled to the housing 310, and a connection part 913 connecting the inner part 912 and the outer part 911. can do. Meanwhile, a connection portion 913 may be located in the space 830 formed between the plurality of supports 821, 822, and 823.

As an example, the lower support member 900 may include four support units 910, 920, 930, and 940 as shown in FIG. 3. That is, the lower support member 900 may include a first support unit 910, a second support unit 920, a third support unit 930, and a fourth support unit 940. Meanwhile, each of the four support units (910, 920, 930, and 940) includes a first inner part (912a) coupled to the bobbin 210, a first outer part (911a) and a first inner part (912a) coupled to the housing 310. ) and a first connection portion 913a connecting the first outer portion 911a.

The first connection portion 913a may include a plurality of bent portions 916 and 917 that are bent or curved. That is, the first connection portion 913a may include a first bent portion 916 and a second bent portion 917. Meanwhile, two or more of the plurality of bent parts 916 and 917 may be located in the space 830. That is, the first bent part 916 and the second bent part 917 may be located in the space 830.

The separation space 830 may be provided in plural numbers. As an example, there may be eight separation spaces 830. At this time, eight support parts 820 may be provided. Meanwhile, at least a portion of the first connection portion 913a may be located in one or two or more of the plurality of spaces 830 . In more detail, the support portion 820 includes a first support 821, a second support 822 positioned adjacent to the first support 821, and a third support positioned adjacent to the second support 822. It may include (823). At this time, the separation space 830 is the first separation space 831 located between the first support body 821 and the second support body 822, and between the second support body 822 and the third support body 823. It may include a second separation space 832 located in . That is, the first space 831 and the second space 832 may be located with the second support 822 between them. In other words, the first separation space 831 may be located on one side of the second support 822, and the second separation space 832 may be located on the other side of the second support 822. The first separation space 831 and the second separation space 832 may be located adjacent to each other. At least a portion of the first connection portion 913a may be located in both the first space 831 and the second space 832, or may be located in either the first space or the second space. there is.

The housing 310 may include a first housing edge portion 315 formed by meeting side surfaces, and a second housing edge portion 316 located adjacent to the first housing edge portion 315. As an example, the housing 310 may have four edge portions or corner portions, and the first housing edge portion 315 and the second housing edge portion 316 may not be located diagonally from each other. At this time, the first outer portion 911a is located closer to the first housing edge portion 315 than the second housing edge portion 316, and the first inner portion 912a is located closer to the second housing edge portion 315 than the first housing edge portion 315. It may be located close to the edge portion 316. That is, the first outer portion 911a and the first inner portion 912a may be positioned separately based on the center of one side of the housing 310.

The separation space 830 may be spaced apart from the first housing edge portion 315 and the second housing edge portion 316 by a corresponding distance. That is, as an example, as shown in FIG. 3, the separation distance between the second space 832 and the first housing edge portion 315 is the separation distance between the second space 832 and the second housing edge portion 316. It can correspond to . However, the first separation space 831 may be located biased toward the first housing edge portion 315.

A portion of the first movable part 220 may be exposed through the separation space 830. At this time, the exposed first movable part 220 and the connection part 913 may be arranged to face each other. Four separation spaces 830 can be formed, one on each side, and the connection portions 913 can be arranged. Four separation spaces 830 are formed, one at each corner, so that the outer portion 911 can be disposed.

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

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

Meanwhile, autofocus feedback can be applied to more precisely realize the autofocus function of the camera module according to an embodiment of the present invention. The first sensor 711, which is mounted on the bobbin 210 and is provided as a Hall sensor, detects the magnetic field of the second moving part 320, which is provided with a magnet fixed to the housing 310. Meanwhile, when the bobbin 210 moves relative to the housing 310, the amount of magnetic field detected by the first sensor 711 changes. The first sensor 711 detects the movement amount or position of the bobbin 210 in the z-axis direction in this manner and transmits the detection value to the control unit. The control unit determines whether to perform additional movement of the bobbin 210 based on the received detection value. Since this process occurs in real time, the autofocus function of the camera module according to an embodiment of the present invention can be performed more precisely through autofocus feedback.

The 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 movable 420, the second movable 320 becomes the third movable due to electromagnetic interaction between the third movable 420 and the second movable 320 provided with a magnet. The movement is performed to (420). At this time, the housing 310 to which the second movable member 320 is coupled moves integrally with the second movable member 320. That is, the housing 310 moves in the horizontal direction with respect to the base 500. Meanwhile, at this time, the housing 310 may be induced to tilt with respect to the base 500. This movement of the housing 310 results in the lens module moving relative to the image sensor in a direction parallel to the direction in which the image sensor is placed, thereby performing the camera shake correction function.

Meanwhile, hand shake correction feedback may be applied to more precisely realize the hand shake correction function of the camera module according to an embodiment of the present invention. A pair of second sensors 720 mounted on the base 500 and provided as Hall sensors detect the magnetic field of the second moving part 320 provided as a magnet fixed to the housing 310. Meanwhile, when the housing 310 moves relative to the base 500, the amount of magnetic field detected by the second sensor 720 changes. The pair of second sensors 720 detects the amount of movement or position of the housing 310 in the horizontal direction (x-axis and y-axis directions) in this manner and transmits the detection value to the control unit. The control unit determines whether to perform additional movement of the housing 310 based on the received detection 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 order to perform the mentioned autofocus function, a configuration that supports the bobbin 210 movably with respect to the housing 310 is inevitably required. Meanwhile, in the camera module according to an embodiment of the present invention, the lower support member 900 elastically supports the bobbin 210 with respect to the housing 310. Here, the lower support member 900 needs to be provided as an elastic member that is wide and long. This is because, in the case of narrow width and short length like conventional elastic members, the oscillation phenomenon at the resonance point is a problem. In particular, as the secondary resonance point is formed around 200Hz, the oscillation phenomenon at the secondary resonance point becomes a problem. .

At least a portion of the lower support member 900 of the camera module according to an embodiment of the present invention is located in the space 830 formed between the plurality of support parts 820 located along the outer circumference of the bobbin 210, The lower support member 900 of the present invention can be provided in a wider and longer form compared to the prior art.

In the above, even though all the components constituting the embodiment of the present invention have been described as being combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, as long as it is within the scope of the purpose of the present invention, all of the components may be operated by selectively combining one or more of them. In addition, terms such as “include,” “comprise,” or “have” described above mean that the corresponding component may be present, unless specifically stated to the contrary, and therefore do not exclude other components. Rather, it should be interpreted as being able to include other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology and, unless explicitly defined in the present invention, should not be interpreted in an idealized or overly formal sense.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but rather to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

100: Cover Can 200: First mover
300: second movable 400: stator
500: Base 600: Support member
700: sensor unit 810: first movable unit coupling unit
820: support 830: separation space
900: Lower support member

Claims (15)

housing;
a bobbin disposed within the housing;
a first driving unit disposed on the bobbin;
a second driving unit arranged to overlap the first driving unit in a first direction perpendicular to the optical axis direction; and
Includes a support member coupled to the bobbin and the housing,
The support member includes an inner part coupled to the bobbin, an outer part coupled to the housing, and a connection part connected between the inner part and the outer part,
The bobbin includes a first protruding area and a second protruding area overlapping the first driving part in the optical axis direction, and a first separation space formed between the first protruding area and the second protruding area,
The first and second protruding areas protrude from the lower surface of the bobbin in a direction toward the housing,
When viewed from the bottom of the bobbin,
A portion of the first driving unit is exposed through the first space,
A portion of the connection portion passes through the first space in a direction from the bobbin to the housing,
The bobbin includes a coupling portion coupled to the inner portion of the support member,
The housing includes a first corner area and a second corner area arranged on opposite sides of each other, and a third corner area and a fourth corner area arranged on opposite sides,
The coupling portion of the bobbin includes a first coupling portion disposed closest to the first corner region among the first to fourth corner regions of the housing, and a second coupling portion disposed closest to the second corner region, A third coupling portion disposed closest to the third corner area, and a fourth coupling portion disposed closest to the fourth corner region,
The support member includes a first support unit coupled to the first coupling portion of the bobbin and the third corner area of the housing, and a first support unit coupled to the fourth coupling portion of the bobbin and the first corner region of the housing. A second support unit, a third support unit coupled to the second coupling part of the bobbin and the fourth corner area of the housing, and a third support unit coupled to the third coupling part of the bobbin and the second corner area of the housing. It includes a fourth support unit that is coupled,
The first driving part includes a first part and a second part that appear to be spaced apart from each other by the bobbin when viewed from the bottom of the bobbin,
The first support unit is a lens including a first part that overlaps the first part of the first driving part in the optical axis direction and a second part that overlaps the second part of the first driving part in the optical axis direction. drive. According to paragraph 1,
The first driving unit includes a first coil,
The second driving unit is a lens driving device including a magnet disposed in the housing. According to paragraph 1,
A lens driving device wherein the support member is a lower support member coupled to the lower surface of the bobbin. According to paragraph 1,
The connection portion of the support member includes a first connection unit included in the first support unit,
The first connection unit of the first support unit is disposed between the first coupling portion of the bobbin and the third corner area of the housing. According to paragraph 1,
The first coupling portion of the bobbin is disposed between virtual first and second straight lines connecting the optical axis to the first corner area and the third corner area of the housing, respectively. According to paragraph 1,
The connection portion of the support member includes a second connection unit included in the second support unit,
The second connection unit of the second support unit is disposed between the second coupling portion of the bobbin and the fourth corner area of the housing. According to clause 6,
The first driving part includes a third part and a fourth part that appear to be spaced apart from each other by the bobbin when viewed from the bottom of the bobbin,
The second connection unit of the second support unit includes a third part that overlaps the third part of the first driving part in the optical axis direction, and a third part that overlaps the fourth part of the first driving part in the optical axis direction. Lens drive mechanism containing four parts. In clause 7,
The second coupling portion of the bobbin is disposed between virtual third and fourth straight lines connecting the optical axis to the second corner area and the fourth corner area of the housing, respectively. According to paragraph 1,
Each of the first and second protruding regions of the bobbin includes a portion disposed radially outward from the coupling portion of the bobbin. According to paragraph 3,
Base;
a circuit board disposed on the base;
a second coil disposed on the circuit board;
an upper support member connecting the upper part of the housing and the upper part of the bobbin; and
It includes a lateral support member electrically connecting the upper support member and the circuit board,
A lens driving device wherein the housing is disposed on the base. housing;
a bobbin disposed within the housing;
a coil disposed on the bobbin;
a magnet disposed to overlap the coil in a first direction perpendicular to the optical axis; and
Includes a support member coupled to the bobbin and the housing,
The support member includes an inner part coupled to the bobbin, an outer part coupled to the housing, and a connection part connected between the inner part and the outer part,
The bobbin includes first to third protruding areas overlapping the coil in the optical axis direction, a first space formed between the first protruding area and the second protruding area, and the second protruding area and the third protruding area. It includes a second separation space formed between the protruding areas,
The first to third protruding regions protrude from the lower surface of the bobbin in a direction toward the housing,
When viewed from the bottom of the bobbin,
The coil includes a first area exposed through the first separation space and a second area exposed through the second separation space,
The connection portion includes a first region that intersects the first region of the coil in the first space and a second region that overlaps the second region of the coil in the second space,
The bobbin includes a coupling portion coupled to the inner portion of the support member,
The housing includes a first corner area and a second corner area arranged on opposite sides of each other, and a third corner area and a fourth corner area arranged on opposite sides,
The coupling portion of the bobbin includes a first coupling portion disposed closest to the first corner region among the first to fourth corner regions of the housing, and a second coupling portion disposed closest to the second corner region, A third coupling portion disposed closest to the third corner area, and a fourth coupling portion disposed closest to the fourth corner region,
The support member includes a first support unit coupled to the first coupling portion of the bobbin and the third corner area of the housing, and a first support unit coupled to the fourth coupling portion of the bobbin and the first corner region of the housing. A second support unit, a third support unit coupled to the second coupling part of the bobbin and the fourth corner area of the housing, and a third support unit coupled to the third coupling part of the bobbin and the second corner area of the housing. It includes a fourth support unit that is coupled,
The coil includes a first part and a second part that appear to be spaced apart from each other by the bobbin when viewed from the bottom of the bobbin,
The first support unit is a lens driving device including a first part that overlaps the first part of the coil in the optical axis direction and a second part that overlaps the second part of the coil in the optical axis direction. According to clause 11,
The connection portion of the support member includes a first connection unit included in the first support unit,
The first connection unit of the first support unit is disposed between the first coupling portion of the bobbin and the third corner area of the housing. housing;
a bobbin disposed within the housing;
a first driving unit disposed on the bobbin;
a second driving unit disposed in the housing; and
Includes a support member coupled to the bobbin and the housing,
The support member includes an inner part coupled to the bobbin, an outer part coupled to the housing, and a connection part connected between the inner part and the outer part,
The bobbin includes a first protruding area and a second protruding area overlapping the first driving part in the optical axis direction, and a first separation space formed between the first protruding area and the second protruding area,
A portion of the connection portion overlaps the first space in the optical axis direction and overlaps to intersect a portion of the first driving portion,
The portion of the connecting portion does not overlap the second driving portion in a direction parallel to an imaginary straight line connecting two corners located diagonally of the housing,
The bobbin includes a coupling portion coupled to the inner portion of the support member,
The housing includes a first corner area and a second corner area arranged on opposite sides of each other, and a third corner area and a fourth corner area arranged on opposite sides,
The coupling portion of the bobbin includes a first coupling portion disposed closest to the first corner region among the first to fourth corner regions of the housing, and a second coupling portion disposed closest to the second corner region, A third coupling portion disposed closest to the third corner area, and a fourth coupling portion disposed closest to the fourth corner region,
The support member includes a first support unit coupled to the first coupling portion of the bobbin and the third corner area of the housing, and a first support unit coupled to the fourth coupling portion of the bobbin and the first corner region of the housing. A second support unit, a third support unit coupled to the second coupling part of the bobbin and the fourth corner area of the housing, and a third support unit coupled to the third coupling part of the bobbin and the second corner area of the housing. It includes a fourth support unit that is coupled,
The first driving unit includes a first part and a second part that appear to be spaced apart from each other by the bobbin when viewed from the bottom of the bobbin,
The first support unit is a lens including a first part that overlaps the first part of the first driving part in the optical axis direction and a second part that overlaps the second part of the first driving part in the optical axis direction. drive. printed circuit board;
an image sensor disposed on the printed circuit board;
The lens driving device of any one of claims 1 to 13 disposed on the printed circuit board; and
A camera module including a lens coupled to the bobbin of the lens driving device. main body;
The camera module of claim 14 disposed in the main body; and
An optical device including a display unit disposed on the main body and outputting images and photos captured by the camera module.