KR102652018B1 - Lens driving device, camera module and optical apparatus - Google Patents

Abstract

This embodiment includes: a housing; a bobbin positioned to be spaced apart from the housing; A first driving unit located on the bobbin; a second driving part located in the housing and facing the first driving part; An aperture unit located on the bobbin; and a support member coupled to the bobbin and the housing, wherein the support member is formed of a flexible circuit board.

Description

Lens driving device, camera module and optical apparatus}

This embodiment relates to lens driving devices, camera modules, and optical devices.

The content described below only provides background information for this embodiment and does not describe prior art.

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, there is a high need for camera functions using new actuators for camera modules. Accordingly, a new method of using variable aperture using an aperture actuator is emerging. Therefore, in order to drive the aperture actuator with auto focus (AF, Auto Focus), a technology is required to connect the aperture signal cable without interference.
(Patent Document 1) KR 10-2014-0058466 A

In order to solve the above-described problem, the present embodiment seeks to provide a lens driving device including a structure for connecting an iris signal connection line for autofocus driving an iris actuator (IRIS Actuator) without interference.

Additionally, it is intended to provide a camera module and optical device including the lens driving device.

The lens driving device according to this embodiment includes a housing; a bobbin positioned to be spaced apart from the housing; A first driving unit located on the bobbin; a second driving part located in the housing and facing the first driving part; An aperture unit located on the bobbin; and a support member coupled to the bobbin and the housing, wherein the support member may be formed of a flexible circuit board.

The support member may include a first coupling part coupled to the housing, a second coupling part coupled to the bobbin, and a connection part connecting the first coupling part and the second coupling part.

The housing includes a first side portion and a second side portion located opposite the first side portion, and the bobbin includes a first side portion facing the first side portion and a second side portion facing the second side portion. It includes two side parts, wherein the first coupling part is coupled to the first side part of the housing, and the second coupling part may be coupled to the second side part of the bobbin.

The connection portion includes a first extension portion extending from the first coupling portion toward the second coupling portion, a second extension portion bent from the first extension portion and extending toward the first coupling portion, and the second extension portion. It may include a third extension portion bent from the portion and extending to the second coupling portion.

The first coupling portion includes first and second connectors spaced apart from each other, and the connecting portion includes first and second connectors spaced apart from each other, and the first connector includes the first connector and the second connector. Two coupling parts are connected, and the second connector can connect the second coupling unit and the second coupling part.

The first coupling portion includes a body portion coupled to the upper surface of the lower plate of the housing, and a terminal portion bent downward and extending from the body portion, and the second coupling portion includes a body portion coupled to the lower surface of the bobbin. , and may include a mounting portion bent upward and extending from the body portion.

The aperture unit includes a third driving part, a fourth driving part opposing the third driving part, and first and second shutter parts interlocking with the third driving part, and the first and second shutter parts include the first and second shutter parts. By moving the 3-drive eastern part, they can move in opposite directions.

A sensor unit that detects the position of the third driving unit may be located in the mounting unit.

The lens driving device is electrically connected to the second driving unit and further includes a substrate positioned in the housing, the support member is electrically connected to the fourth driving unit, and the substrate is spaced apart from the support member. You can.

The lens driving device may further include a guide ball contacting the bobbin and the housing.

The camera module according to this embodiment includes a housing; a bobbin positioned to be spaced apart from the housing; A first driving unit located on the bobbin; a second driving part located in the housing and facing the first driving part; An aperture unit located on the bobbin; and a support member coupled to the bobbin and the housing, wherein the support member may be formed of a flexible circuit board.

The optical device according to this embodiment includes a housing; a bobbin positioned to be spaced apart from the housing; A first driving unit located on the bobbin; a second driving part located in the housing and facing the first driving part; An aperture unit located on the bobbin; and a support member coupled to the bobbin and the housing, wherein the support member may be formed of a flexible circuit board.

In this embodiment, the FPCB of the aperture actuator is designed in the form of a leaf spring, so that the interference effect of the aperture actuator with the FPCB can be minimized.

1 is a conceptual diagram of a camera module according to a first embodiment of the present invention.
FIG. 2 is an exploded perspective view illustrating the lens driving device shown in FIG. 1.
Figure 3 is a perspective view illustrating the aperture unit shown in Figure 1.
Figure 4 is an exploded perspective view for explaining the operation of the aperture unit according to Figure 3.
Figure 5 is a configuration diagram showing an aperture unit and related configuration according to the first embodiment of the present invention.
Figure 6 is a conceptual diagram of a camera module according to a second embodiment of the present invention.
7 to 9 are perspective views of a partial configuration of a lens driving device according to a third embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described through exemplary drawings. When assigning reference numerals to components in each drawing, identical components are indicated with the same reference numerals as much as possible, even if they are shown in different drawings. Additionally, when describing embodiments of the present invention, detailed descriptions of some components may be omitted.

Additionally, when describing components of embodiments of the present invention, terms such as first and second 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' or 'coupled' to another component, that component may be directly connected or coupled to that other component, but there is another component between that component and that other component. It should be understood that elements may be connected or combined.

The 'optical axis direction' used below is defined as the optical axis direction of the lens module when coupled to the lens driving device. Meanwhile, “optical axis direction” can be used interchangeably with vertical direction, z-axis direction, etc.

The 'auto focus function' used below focuses on the subject by adjusting the distance to the image sensor by moving the lens module in the optical axis direction according to the distance to the subject so that a clear image of the subject can be obtained on the image sensor. Defined as a function. Meanwhile, 'Auto Focus' can be used interchangeably with 'Auto Focus' and 'AF'.

Hereinafter, one of the 'driving magnet unit 220' and the 'driving coil unit 320' may be referred to as the 'first driving unit' and the other may be referred to as the 'second driving unit'.

Hereinafter, one of the 'aperture magnet 410' and the 'aperture coil 420' may be referred to as the 'third driving unit' and the other may be referred to as the 'fourth driving unit'.

Hereinafter, one of the 'aperture sensor unit 700' and the 'AF sensor unit 800' may be referred to as the 'first sensor unit' and the other may be referred to as the 'second sensor unit'.

Below, the configuration of the optical device according to this embodiment will be described.

Optical devices according to this embodiment include mobile phones, mobile phones, smart phones, portable smart devices, digital cameras, laptop computers, digital broadcasting terminals, PDAs (Personal Digital Assistants), and PMPs (Portable Multimedia Players). ), navigation, etc., but is not limited to this and any device for taking videos or photos is possible.

The optical device according to this embodiment 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 module installed in the main body to capture images or photos. can do.

Below, the configuration of the camera module according to the first embodiment of the present invention will be described.

1 is a conceptual diagram of a camera module according to a first embodiment of the present invention.

Referring to Figure 1, the camera module according to the first embodiment of the present invention includes a lens driving device, a printed circuit board 10, an image sensor 20, an infrared cut-off filter 30, a lens module 40, and a control unit. It may include (50) and a power supply unit (60). In the camera module according to the first embodiment of the present invention, a lens driving device, a printed circuit board 10, an image sensor 20, an infrared cut-off filter 30, a lens module 40, a control unit 50, and power supply are applied. One or more of the parts 60 may be omitted.

The printed circuit board 10 may support the lens driving device. An image sensor 20 may be mounted on the printed circuit board 10. An image sensor 20 may be located inside the upper surface of the printed circuit board 10. A sensor holder (not shown) may be located outside the upper surface of the printed circuit board 10. A lens driving device is located on the upper side of the sensor holder. A lens driving device may be located outside the upper surface of the printed circuit board 10. The image sensor 20 may be located inside the upper surface of the printed circuit board 10. Through this structure, light passing through the lens module 40 accommodated inside the lens driving device can be irradiated to the image sensor 20 mounted on the printed circuit board 10. The printed circuit board 10 can supply power to the lens driving device. Meanwhile, a control unit 50 for controlling the lens driving device may be located on the printed circuit board 10.

The image sensor 20 may be mounted on the printed circuit board 10. The image sensor 20 may be positioned so that its optical axis coincides with that of the lens module 40. Through this, the image sensor 20 can acquire light that has passed through the lens module 40. The image sensor 20 can output the irradiated light as an image. The image sensor 20 may be, for example, a charge coupled device (CCD), a metal oxide semiconductor (MOS), a CPD, or a CID. However, the type of image sensor 20 is not limited to this.

The infrared filter 30 may block light in the infrared region from being incident on the image sensor 20. The infrared filter 30 may be located between the lens module 40 and the image sensor 20. The infrared filter 30 may be located on a holder member (not shown) that is provided separately from the base 500. However, the infrared filter 30 may be mounted in a through hole formed in the center of the base 500. The infrared filter 30 may be formed of, for example, a film material or a glass material. As an example, the infrared filter 30 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. The infrared filter 30 may be an infrared absorption filter or an infrared reflection filter.

The lens module 40 may include a lens and a lens barrel. The lens module 40 may include one or more lenses and a lens barrel (not shown) that accommodates the lenses. The lens accommodated in the lens barrel may be coupled to the bobbin 210. However, the lens barrel may be omitted and the lens may be directly coupled to the bobbin 210. The lens module 40 is coupled to the lens driving device and can move together with the lens driving device. The lens module 40 may be coupled to the inside of the lens driving device. The lens module 40 may be screwed to the lens driving device. The lens module 40 may be coupled to a lens driving device using an adhesive (not shown). Meanwhile, light passing through the lens module 40 may be irradiated to the image sensor 20.

The lens module 40 may include a first lens group 41 and/or a second lens group 42. The first lens group 41 may be accommodated in the first receiving portion 251 of the bobbin 210. The second lens group 42 may be accommodated in the second receiving portion 252 of the bobbin 210. The first lens group 41 and the second lens group 42 may be spaced apart. The first and second blades 430 and 440 of the aperture unit 400 may be located between the first lens group 41 and the second lens group 42. An aperture unit 400 may be located below the first lens group 41. An aperture unit 400 may be located on the second lens group 42.

The control unit 50 may be mounted on the printed circuit board 10. The control unit 50 may be located outside the lens driving device. However, the control unit 50 may be located inside the lens driving device. The control unit 50 can control the direction, intensity, and amplitude of the current supplied to each component of the lens driving device. The control unit 50 may control the lens driving device to perform the autofocus function of the camera module. Additionally, the control unit 50 may control the aperture unit 400 of the lens driving device. The control unit 50 can perform feedback control of the autofocus function. More specifically, the control unit 50 receives the position of the bobbin 210 detected by the AF sensor unit 800 and controls the power or current applied to the driving coil unit 320 to provide a more precise autofocus function. can do. In addition, the control unit 50 can control the aperture unit 400 more precisely in real time through the position information of the aperture magnet 410 of the aperture unit 400 detected by the aperture sensor unit 700.

The power applicator 60 may supply power to the aperture coil 420 of the aperture unit 400. The power applicator 60 may supply power to the aperture coil 420 under the control of the control unit 50 . In this embodiment, the power application unit 60 is described as a separate configuration from the control unit 50, but the power application unit 60 is built into the control unit 50 and may not be distinguished from the control unit 50.

Hereinafter, the configuration of the lens driving device according to the first embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is an exploded perspective view illustrating the lens driving device shown in FIG. 1, FIG. 3 is a perspective view illustrating the aperture unit shown in FIG. 1, and FIG. 4 is an exploded view illustrating the driving of the diaphragm unit shown in FIG. 3. It is a perspective view, and Figure 5 is a configuration diagram showing an aperture unit and related configuration according to the first embodiment of the present invention.

However, Figure 1 is a conceptual diagram and some configurations may be different from Figures 2 to 5. In this case, for some different configurations, the configuration shown in FIG. 1 can be understood as a modified example of the configuration shown in FIGS. 2 to 5.

The lens driving device according to the first embodiment of the present invention may include a bobbin 210, a driving magnet unit 220, and a guide ball 230. However, in the lens driving device according to the first embodiment of the present invention, one or more of the bobbin 210, the driving magnet portion 220, and the guide ball 230 may be omitted.

The bobbin 210 may be spaced apart from the housing 310. The bobbin 210 may be located inside the housing 310. A driving magnet unit 220 may be coupled to the bobbin 210. An aperture unit 400 may be coupled to the bobbin 210. The bobbin 210 may be formed integrally with the aperture unit 400. The bobbin 210 can move integrally with the aperture unit 400. The bobbin 210 may be located below the cover member 100. The bobbin 210 may be accommodated in the internal space of the cover member 100. The bobbin 210 may be combined with the lens module 40. The outer peripheral surface of the lens module 40 may be coupled to the inner peripheral surface of the bobbin 210. The bobbin 210 may be movably supported with respect to the base 500 . The bobbin 210 may move in the optical axis direction relative to the housing 310 .

The bobbin 210 may include an aperture accommodating part 240, a lens accommodating part 250, a first driving part coupling part (not shown), and a guide ball coupling part (not shown).

The bobbin 210 may include an aperture accommodating portion 240 that accommodates at least a portion of the aperture unit 400. The aperture accommodating portion 240 may accommodate at least a portion of the aperture unit 400. Through this structure, the bobbin 210 can move integrally with the aperture unit 400. The aperture receiving portion 240 may be formed by recessing a portion of one surface of the bobbin 210. The aperture receiving portion 240 may be formed by a portion of the upper surface of the bobbin 210 being depressed downward. The aperture receiving portion 240 may be formed by partially recessing one side of the bobbin 210 toward the other side. The aperture accommodating part 240 may be located between the first accommodating part 251 and the second accommodating part 252. Through this structure, the aperture unit 400 can be located between the first lens group 41 and the second lens group 42. In this case, the aperture unit 400 can move integrally with the first lens group 41 and the second lens group 42.

The bobbin 210 may include a lens receiving portion 250 formed inside the bobbin 210. The bobbin 210 may include a top and bottom open lens receiving portion 250 on the inside. The bobbin 210 may include a lens receiving portion 250 formed on the inside. A lens module 40 may be coupled to the lens accommodating portion 250. A screw thread having a shape corresponding to a screw thread formed on the outer circumferential surface of the lens module 40 may be formed on the inner peripheral surface of the lens accommodating portion 250. That is, the lens accommodating part 250 may be screwed to the lens module 40. An adhesive may be interposed between the lens module 40 and the bobbin 210. At this time, the adhesive may be an epoxy that is cured by ultraviolet rays (UV) or heat. That is, the lens module 40 and the bobbin 210 may be bonded using ultraviolet curing epoxy and/or heat curing epoxy.

The lens accommodating part 250 includes a first accommodating part 251 in which the first lens group 41 of the lens module 40 is accommodated, and a second accommodating part 251 in which the second lens group 42 of the lens module 40 is accommodated. It may include two receiving parts (252). An aperture accommodating part 240 may be located between the first accommodating part 251 and the second accommodating part 252.

The bobbin 210 may include a first driving part coupling part where the driving magnet part 220 is disposed. The first driving unit coupling portion may be formed on the outer surface of the bobbin 210. The first driving part coupling part may be formed by recessing a portion of the outer surface of the bobbin 210 to correspond to the shape of the driving magnet part 220. The first driving unit coupling portion may be formed on the outer surface of the bobbin 210. The first driving unit coupling portion may be formed only on one side of the bobbin 210. The first driving part coupling part may be formed by having one surface of the bobbin 210 recessed into a shape corresponding to the driving magnet part 220. The first driving unit coupling unit may accommodate at least a portion of the driving magnet unit 220.

The bobbin 210 may include a guide ball coupling portion coupled to the guide ball 230. The guide ball coupling portion may be coupled to the guide ball 230. The guide ball coupling portion may accommodate a portion of the guide ball 230. The guide ball coupling portion is formed to be round and can rotatably accommodate the guide ball 230. The guide ball coupling portion may be formed in a number corresponding to the guide ball 230. As an example, the guide ball coupling portion may be provided in four pieces to each accommodate four guide balls 230. The plurality of guide ball coupling units may be arranged to be spaced apart from each other.

The driving magnet unit 220 may be located in the bobbin 210. The driving magnet unit 220 may be coupled to the bobbin 210. Through this structure, the driving magnet portion 220 and the bobbin 210 can move as one body. The driving magnet unit 220 may face the driving coil unit 320. Through this structure, the driving magnet unit 220 can interact electromagnetically with the driving coil unit 320. The driving magnet unit 220 can move through electromagnetic interaction with the driving coil unit 320. As a variation, the driving magnet unit 220 and the driving coil unit 320 may be positioned interchangeably. That is, the driving magnet unit 220 may be located in the housing 310, and the driving coil unit 320 may be located in the bobbin 210.

The guide ball 230 may be located between the bobbin 210 and the housing 310. The guide ball 230 may be in contact with the bobbin 210 and the housing 310. Through this structure, the guide ball 230 can guide the movement of the bobbin 210 when the bobbin 210 moves relative to the housing 310. The guide ball 230 may guide the movement of the bobbin 210 in the vertical direction (z-axis direction). As an example, the guide balls 230 may be provided in a total of four, two on each side. However, it is not limited to this.

The lens driving device according to the first embodiment of the present invention may include a housing 310, a driving coil unit 320, and a substrate 330. However, in the lens driving device according to the first embodiment of the present invention, one or more of the housing 310, the driving coil unit 320, and the substrate 330 may be omitted.

The housing 310 may be spaced apart from the bobbin 210. The housing 310 may be located outside the bobbin 210. A driving coil unit 320 may be coupled to the housing 310. Housing 310 may be coupled to base 500. The housing 310 may be coupled to one side of the base 500. The housing 310 is made of an insulating material, and may be made of an injection molded product considering productivity. As an example, the housing 310 may be a plate-shaped member coupled to one side of the base 500.

The housing 310 may include an inner space, a second drive unit coupling portion, and a guide ball coupling portion.

The housing 310 has an open upper side and can accommodate at least a portion of the bobbin 210 movably in the optical axis direction. The housing 310 may include an upper open inner space on the inside. The bobbin 210 may be movably disposed in the inner space. That is, the inner space may be provided in a shape corresponding to the bobbin 210. Additionally, the inner peripheral surface of the housing 310 forming the inner space may be positioned spaced apart from the outer peripheral surface of the bobbin 210. The inner space described above can be understood as a space formed by the side plates of the housing 310 and the base 500.

The housing 310 may be formed on a side surface in a shape corresponding to the driving coil unit 320 and may include a second driving unit coupling unit for accommodating the driving coil unit 320. The second driving part coupling part can accommodate the driving coil part 320. The driving coil unit 320 may be fixed to the second driving unit coupling part with an adhesive (not shown). Meanwhile, the second driving unit coupling portion may be located on the inner peripheral surface of the housing 310. In this case, there is an advantage in electromagnetic interaction between the driving coil unit 320 and the driving magnet unit 220 located inside the driving coil unit 320.

The housing 310 may include a guide ball coupling portion coupled to the guide ball 230. The guide ball coupling portion may be coupled to the guide ball 230. The guide ball coupling portion may accommodate a portion of the guide ball 230. The guide ball coupling portion is formed to be round and can rotatably accommodate the guide ball 230. The guide ball coupling portion may be formed in a number corresponding to the guide ball 230. As an example, the guide ball coupling portion may be provided in four pieces to each accommodate four guide balls 230. The plurality of guide ball coupling units may be arranged to be spaced apart from each other.

The driving coil unit 320 may be located in the housing 310. The driving coil unit 320 may face the driving magnet unit 220. Through this structure, when power is applied to the driving coil unit 320, the driving coil unit 320 and the driving magnet unit 220 can interact electromagnetically. That is, when power is applied to the driving coil unit 320, the driving magnet unit 220 can move. At this time, the driving magnet unit 220 may move integrally with the bobbin 210.

The substrate 330 may be electrically connected to the driving coil unit 320. The substrate 330 can supply power to the driving coil unit 320. The substrate 330 may be located in the housing 310 . The substrate 330 may include a terminal portion. The terminal portion may be located at the bottom of the substrate 330. The terminal portion may be electrically connected to the printed circuit board 10 by soldering.

The lens driving device according to the first embodiment of the present invention may include a cover member 100.

The cover member 100 can accommodate the bobbin 210 in its inner space. The cover member 100 may be coupled to the base 500. The cover member 100 can form the exterior of the lens driving device. 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 be formed of a metal material, as an example. In more detail, the cover member 100 may be made of a metal plate. In this case, the cover member 100 can block electromagnetic interference (EMI). Because of these features of the cover member 100, the cover member 100 may be referred to as an EMI shield can. The cover member 100 can block radio waves generated outside the lens driving device from flowing into the cover member 100. Additionally, the cover member 100 can 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 to this.

The cover member 100 may include a top plate and a side plate. The cover member 100 may include a side plate whose lower end is coupled to the base 500. The cover member 100 may include an upper plate located above the bobbin 210. The lower end of the side plate of the cover member 100 may be mounted on the base 500. The cover member 100 may be mounted on the base 500 with its inner surface in close contact with part or all of the side surface of the base 500. The cover member 100 can protect internal components from external impact and simultaneously prevent penetration of external contaminants. As a variation, the lower end of the side plate of the cover member 100 may be directly coupled to the printed circuit board 10 located below the base 500.

The cover member 100 may include an opening formed in the upper plate to expose the lens module 40. The opening may be provided in a shape corresponding to the lens module 40. The size of the opening may be larger than the diameter of the lens module 40 so that the lens module 40 can be assembled through the opening. Meanwhile, light introduced through the opening may pass through the lens module 40. At this time, the light passing through the lens module 40 may be acquired as an image by the image sensor 20.

The lens driving device according to the first embodiment of the present invention may include an aperture unit 400.

The aperture unit 400 may be coupled to the bobbin 210. The aperture unit 400 can move integrally with the bobbin 210. The aperture unit 400 may be located between the first lens group 41 and the second lens group 42.

The aperture unit 400 may include an aperture magnet 410. The aperture unit 400 may include an aperture coil 420 facing the aperture magnet 410. The aperture unit 400 may include first and second blades 430 and 440 that interact with the aperture magnet 410. The aperture unit 400 may include an aperture magnet 410 and a slider 450 that moves integrally. The aperture unit 400 may include a fixed shaft portion 460 that provides a center of rotation by fixing one side of the first and second blades 430 and 440 to the aperture housing 401. However, the configuration of the aperture unit 400 is not limited to this. The aperture unit 400 may be provided in any form that can adjust the amount of light passing through the aperture unit 400 according to the supply of power.

The aperture magnet 410 may be arranged to be movable. The aperture magnet 410 may face the aperture coil 420. Through this structure, the aperture magnet 410 can move when power is applied to the aperture coil 420. When the aperture magnet 410 moves, the slider 450 can also move together. When the slider 450 moves, the first and second blades 430 and 440 may rotate in opposite directions to each other around the fixed shaft portion 460. The position of the aperture magnet 410 can be detected by the aperture sensor unit 700.

The aperture coil 420 may face the aperture magnet 410. The lens driving device may include a component for supplying power to the aperture coil 420. The aperture coil 420 may be electrically connected to the support member 600 as shown in FIG. 9 . Alternatively, the aperture coil 420 may be electrically connected to the substrate 330 as shown in FIG. 7 . When power is supplied, the aperture coil 420 generates a magnetic field and can move the aperture magnet 410 through electromagnetic interaction with the aperture magnet 410. The aperture coil 420 may be located on the rod 421. As an example, the rod 421 may be located on both sides of the aperture magnet 410.

When the aperture magnet 410 moves, the first and second blades 430 and 440 move to adjust the amount of light passing through the aperture unit 400. At this time, the first and second blades 430 and 440 can control the amount of light passing through the aperture unit 400 by adjusting the size of the through hole through which the light passes. The first and second blades 430 and 440 may move in opposite directions as the aperture magnet 410 moves. The first and second blades 430 and 440 can adjust the amount of light passing through the lens module 40 by moving the aperture magnet 410. In more detail, when power is supplied to the aperture coil 420, the area around the rod 421 becomes an electromagnet to move the aperture magnet 410, the slider 450 moves integrally with the aperture magnet 410, and the slider 450 ) As the movement occurs, the first and second blades 430 and 440 rotate and move in opposite directions to each other around the fixed shaft portion 460. Through this, the first and second blades 430 and 440 can adjust the amount of light passing through the through hole 402 formed in the aperture housing 401. The first and second blades 430 and 440 can completely open the through hole 402 and close the through hole 402 in stages. Above, it has been described that the first and second blades 430 and 440 are controlled integrally by the aperture magnet 410, but the present invention is not limited thereto. The first and second blades 430 and 440 can be controlled individually.

Above, the bobbin 210 and the aperture unit 400 have been described as separate components, but the bobbin 210 may be omitted and the lens module 40 may be directly coupled to the aperture unit 400. In other words, the lens module 40 can be accommodated in the aperture unit 400.

The lens driving device according to the first embodiment of the present invention may include a base 500.

The base 500 can accommodate the bobbin 210 therein. The base 500 may be combined with the cover member 100. A housing 310 may be coupled to one side of the base 500. The base 500 may be placed on the printed circuit board 10 . The base 500 may be fixed to the printed circuit board 10 with an active alignment adhesive 70. That is, the base 500 can be fixed to the printed circuit board 10 through an active alignment process. At this time, the active alignment process is a process for aligning the optical axes of the lens module 40 fixed to the lens driving device and the image sensor 20 of the printed circuit board 10, and the active alignment adhesive 70 is exposed to ultraviolet rays. It can be pre-cured by (UV, ultraviolet rays) and main-cured by heat. That is, with the optical axes of the lens module 40 and the image sensor 20 aligned, the base 500 is pre-cured on the printed circuit board 10, and the camera module in this state is cured in an oven to complete assembly. can do. Alternatively, the base 500 may be coupled to the housing 310 using an active alignment adhesive 70. The base 500 may be located below the bobbin 210. Base 500 may be located below the housing 310. A printed circuit board 10 may be located on the lower side of the base 500. The base 500 may perform a sensor holder function to protect the image sensor 20 mounted on the printed circuit board 10. An infrared filter 30 may be mounted on the base 500.

The lens driving device according to the first embodiment of the present invention may include an aperture sensor unit 700.

The aperture sensor unit 700 can detect the position of the aperture magnet 410. The aperture sensor unit 700 may be a Hall sensor, as an example. The aperture sensor unit 700 can detect the strength of the magnetic field of the aperture magnet 410. The aperture sensor unit 700 may be connected to the support member 600. Information about the aperture magnet 410 detected by the aperture sensor unit 700 may be transmitted to the control unit 50.

The lens driving device according to the first embodiment of the present invention may include an AF sensor unit 800.

The AF sensor unit 800 can be used for autofocus feedback. The AF sensor unit 800 can detect the position of the driving magnet unit 220 located in the bobbin 210. The AF sensor unit 800 may be located on the substrate 330 disposed in the housing 310. The AF sensor unit 800 may be located in the space between the closed curved driving coil units 320. The AF sensor unit 800 may include a Hall sensor as an example. At this time, the Hall sensor can detect the position of the driving magnet unit 220 by sensing the magnetic field of the driving magnet unit 220.

Below, the configuration of the camera module according to the second embodiment of the present invention will be described.

Figure 6 is a conceptual diagram of a camera module according to a second embodiment of the present invention.

Referring to FIG. 6, the camera module according to the second embodiment of the present invention includes a lens driving device, a printed circuit board 10, an image sensor 20, an infrared cut-off filter 30, a lens module 40, and It may include a control unit 50. However, in the camera module according to the second embodiment of the present invention, among the lens driving device, printed circuit board 10, image sensor 20, infrared cut-off filter 30, lens module 40, and control unit 50 One or more may be omitted. Meanwhile, the lens driving device, printed circuit board 10, image sensor 20, infrared cut-off filter 30, lens module 40, and control unit 50 of the camera module according to the second embodiment of the present invention. Regarding this, the description in the first embodiment of the present invention can be applied by analogy. Below, the camera module according to the second embodiment of the present invention will be described focusing on the differences from the first embodiment of the present invention.

In the second embodiment, the cover member 100 may be coupled to the housing 310. This is different from the first embodiment, where the cover member 100 is coupled to the printed circuit board 10. However, it is not limited to the first and second embodiments. The cover member 100 may be coupled to the base 500.

In the second embodiment, a support member 600 may be provided. The support member 600 of the second embodiment can replace the guide ball 230 of the first embodiment. The support member 600 may support the bobbin 210 movably. Meanwhile, the support member 600 will be described in detail below with reference to FIGS. 7 to 9.

In the second embodiment, the lower surface of the housing 310 may extend beyond the width of the base 500. At this time, the lower surface of the housing 310 and the upper surface of the base 500 may be adhered to each other using an adhesive.

Below, the configuration of the lens driving device according to the third embodiment of the present invention will be described.

7 to 9 are perspective views of a partial configuration of a lens driving device according to a third embodiment of the present invention.

The lens driving device according to the third embodiment of the present invention includes a cover member 100, a bobbin 210, a driving magnet part 220, a guide ball 230, a housing 310, a driving coil part 320, It may include a substrate 330, an aperture unit 400, and an aperture sensor unit 700. However, in the lens driving device according to the third embodiment of the present invention, the cover member 100, the bobbin 210, the driving magnet part 220, the guide ball 230, the housing 310, and the driving coil part 320. ), the substrate 330, the aperture unit 400, and the aperture sensor unit 700 may be omitted. Meanwhile, the cover member 100, bobbin 210, driving magnet part 220, guide ball 230, housing 310, and driving coil part 320 of the lens driving device according to the third embodiment of the present invention , the description in the first embodiment of the present invention can be applied by analogy to the substrate 330, the aperture unit 400, and the aperture sensor unit 700. Hereinafter, the lens driving device according to the third embodiment of the present invention will be described focusing on the differences from the first embodiment of the present invention.

In the third embodiment, the bobbin 210 may be formed in a rectangular parallelepiped shape. The bobbin 210 includes a first side portion 211 facing the first side portion 311 of the housing 310 and a second side portion 212 facing the second side portion 312 of the housing 310. can do. That is, the second side 212 may be located opposite the first side 211. A driving magnet unit 220 may be located on the first side 211 of the bobbin 210. A guide ball 230 may be located on the first side 211 of the bobbin 210. The driving magnet unit 220 may be located inside the guide ball 230. The aperture magnet 410 of the aperture unit 400 may be located on the second side 212 of the bobbin 210. Through this structure, the aperture sensor unit 700 located on the second side portion 312 of the housing 310 can sense the aperture magnet 410. However, the aperture magnet 410 may not be exposed to the outside of the bobbin 210.

The bobbin 210 may include a support member coupling portion coupled to the support member 600. The coupling portion may be coupled to the second coupling portion 620 of the support member 600. As an example, a protrusion (not shown) of the support member coupling portion may be inserted into and coupled to a groove or hole (not shown) of the second coupling portion 620 of the support member 600. At this time, the protrusion of the support member coupling portion can be heat-sealed while inserted into the hole of the second coupling portion 620 to fix the support member 600.

The housing 310 may include a first side portion 311 and a second side portion 312 located opposite the first side portion 311. The second side portion 311 may be located opposite the first side portion 311. The first side portion 311 may face the first side portion 211 of the bobbin 210. The second side portion 312 may face the second side portion 212 of the bobbin 210.

The housing 310 may include a lower plate 313 and a side plate 314. The lower plate 313 may be combined with the support member 600. The lower plate 313 can optionally support the bobbin 210 from the lower side. That is, when the bobbin 210 is lowered as much as possible, the lower surface of the bobbin 210 can be supported by the lower plate 313 of the housing 313. In other words, the lower plate 313 may function as a lower stopper of the bobbin 210. The side plate 314 may be formed to extend upward from the lower plate 313. The height of the side plate 314 may be higher than the height of the bobbin 210. Some of the side plates 314 of the housing 310 may be coupled in a detachable manner. As an example, among the plurality of side plates 314 of the housing 310, the side plate 314 to which the substrate 330 is coupled may be coupled to the lower plate 313 and the other side plate 314 in a detachable manner. At this time, the attachment and detachment method may be sliding coupling. Through this structure, assembly of the substrate 330 to the housing 310 can be facilitated.

The housing 310 may include a support member coupling portion coupled to the support member 600. As an example, the support member coupling portion may include a coupling protrusion 315. The coupling protrusion 315 may be inserted into and coupled to a groove or hole (not shown) of the first coupling portion 610 of the support member 600. At this time, the coupling protrusion 315 may be heat-sealed while inserted into the hole of the first coupling portion 610 to fix the support member 600. The coupling protrusion 315 may be formed on the upper surface of the lower plate 313 of the housing 310.

The substrate 330 may be coupled to the inner surface of the side plate 314 of the housing 310. The substrate 330 may be spaced apart from the support member 600. That is, the substrate 330 may not be electrically connected to the support member 600.

The lens driving device according to the third embodiment may include a support member 600.

As a comparative example, if the FPCB of the aperture actuator is folded into a 'U' shape and placed on the side of the aperture actuator, the spring strength for the FPCB is very high and the strength of the FPCB varies depending on the degree of bending, making control difficult.

The support member 600 includes an FPCB (Flexible Printed Circuit Board) of an aperture actuator (in this embodiment, may include an aperture magnet 410 and an aperture coil 420) that generates a driving force in the aperture unit 400. It may be designed in the form of a leaf spring. Through this structure, the interference influence of the FPCB of the aperture actuator can be reduced in this embodiment compared to the comparative example.

The support member 600 may be coupled to the bobbin 210. The support member 600 may be coupled to the housing 310. The support member 600 may be coupled to the bobbin 210 and the housing 310. The support member 600 may be formed of a flexible circuit board. At this time, the support member 600 may be referred to as a ‘circuit board.’ However, it is not limited to this. The support member 600 may have elasticity at least in part. As a modified example, the support member 600 may be an elastic member such as a leaf spring. The support member 600 may be electrically connected to the aperture coil 420. The support member 600 may supply external power to the aperture coil 420 through the terminal portion 614. Alternatively, the support member 600 may transmit the sensed information to the aperture sensor unit 700 through the terminal unit 614.

The support member 600 may include a first coupling portion 610 coupled to the housing 310. The support member 600 may include a second coupling portion 620 coupled to the bobbin 210. The support member 600 may include a connection portion 630 connecting the first coupling portion 610 and the second coupling portion 620.

The first coupling portion 610 may be coupled to the housing 310. The first coupling portion 610 may be coupled to the first side portion 311 of the housing 310. The first coupling portion 610 may be coupled to the upper surface of the lower plate 313 of the housing 310. The first coupling portion 610 may be coupled to the coupling protrusion 315 of the housing 310.

The first coupling portion 610 may include first and second coupling units 611 and 612 that are spaced apart from each other. A terminal portion 614 may be formed in each of the first and second combinations 611 and 612. Through this structure, a greater number of conductive lines can be exposed to the outside. A substrate 330 may be located between the first and second combinations 611 and 612. As an example, three terminals spaced apart from each other may be formed in each of the first and second combinations 611 and 612. That is, the first coupling portion 610 may include a total of six terminals spaced apart from each other. At this time, two terminals can be used to supply power to the aperture coil 420, and the remaining four terminals can be used to supply power to the aperture sensor unit 700 and transmit and receive information.

The first coupling portion 610 may include a body portion 613 coupled to the upper surface of the lower plate 313 of the housing 310. The body portion 613 may be coupled to the coupling protrusion 315 of the housing 310. At least a portion of the body portion 613 may be in surface contact with the upper surface of the lower plate 313 of the housing 310. The first coupling portion 610 may include a terminal portion 614 that is bent and extended downward from the body portion 613. The terminal portion 614 may be electrically connected to the printed circuit board 10. The terminal portion 614 and the printed circuit board 10 may be joined by soldering.

The second coupling portion 620 may include a body portion 621 coupled to the bobbin 210 and a mounting portion 622 that extends from the body portion 621 and is bent upward.

The second coupling portion 620 may be coupled to the bobbin 210. The second coupling portion 620 may be coupled to the second side portion 212 of the bobbin 210. That is, the second coupling portion 620 may be located opposite the first coupling portion 610. In other words, the second coupling portion 620 and the first coupling portion 610 may be positioned spaced apart along the side of the housing 310.

The second coupling portion 620 may include a body portion 623 coupled to the lower surface of the bobbin 210. The body portion 623 may be coupled to the protrusion of the bobbin 210. At least a portion of the body portion 623 may be in surface contact with the lower surface of the bobbin 210. The second coupling portion 620 may include a mounting portion 624 that is bent and extends upward from the body portion 623. The aperture sensor unit 700 may be located in the mounting unit 624. At least a portion of the mounting unit 624 may be in surface contact with the side of the bobbin 210. The aperture sensor unit 700 may be located on the mounting portion 624 of the second coupling portion 620 of the support member 600.

The connection portion 630 may connect the first coupling portion 610 and the second coupling portion 620. The connection part 630 may be a part that elastically deforms as the bobbin 210 moves. That is, the connection portion 630 may have elasticity. The connection portion 630 may be bent at least twice. The connection portion 630 may extend in a rounded manner at least in part. The connection portion 630 may include a first extension portion 633 extending from the first coupling portion 610 toward the second coupling portion 620 . The connection portion 630 may include a second extension portion 634 that is bent from the first extension portion 633 and extends toward the first coupling portion 610 . The connection portion 630 may include a third extension portion 635 that is bent from the second extension portion 634 and extends to the second coupling portion 620. At this time, the first extension part 633, the second extension part 634, and the third extension part 635 may overlap in most sections in the longitudinal direction. In this case, since the length of the connection part 630 is maximized, there is an advantage that the width of the connection part 630 can be designed to be wide. That is, a plurality of conductive lines spaced apart from each other can be formed through the connection portion 630. As an example, a total of six conductive lines may be formed through the connection portion 630.

The connection portion 630 may include first and second connection bodies 631 and 632 that are spaced apart from each other. The first connector 631 may connect the first coupling member 611 and the second coupling unit 620. The second connector 632 may connect the second assembly 622 and the second coupling portion 620. As an example, three conductive lines spaced apart from each other may be formed in each of the first assembly 631 and the second assembly 632. That is, the connection portion 630 may include a total of six conductive lines spaced apart from each other. At this time, two conductive lines may be electrically connected to the aperture coil 420 and the remaining four conductive lines may be connected to the aperture sensor unit 700.

Below, the operation of the camera module according to this embodiment will be described.

First, the autofocus function of the camera module according to this embodiment will be described through the first embodiment. When power is supplied to the driving coil unit 320, the driving magnet unit 220 moves relative to the driving coil unit 320 due to electromagnetic interaction between the driving coil unit 320 and the driving magnet unit 220. It will be performed. At this time, the bobbin 210 to which the driving magnet unit 220 is coupled moves integrally with the driving magnet unit 220. That is, the bobbin 210 to which the lens module 40 is coupled inside moves in the optical axis direction (vertically, vertically) with respect to the housing 310. Since this movement of the bobbin 210 results in the lens module 40 moving closer to or moving away from the image sensor 20, in this embodiment, power is supplied to the driving coil unit 320 to control the subject. You can perform focus adjustment.

Meanwhile, in the camera module according to the first embodiment of the present invention, autofocus feedback can be applied to more precisely realize the autofocus function. The AF sensor unit 800 disposed in the housing 310 and equipped with a Hall sensor detects the magnetic field of the driving magnet unit 220 fixed to the bobbin 210. Therefore, when the bobbin 210 moves relative to the housing 310, the AF sensor unit 800 determines the movement amount of the bobbin 210 in the z-axis direction or the real-time position of the bobbin 210 through the above-mentioned method. is detected and the detected value is transmitted to the control unit 50. The control unit 50 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 the first embodiment of the present invention can be performed more precisely through autofocus feedback.

Additionally, an aperture may be driven in the camera module according to this embodiment. When power is supplied to the aperture coil 420, the aperture magnet 410 moves relative to the aperture coil 420 due to electromagnetic interaction between the aperture coil 420 and the aperture magnet 410. At this time, the first and second blades 430 and 440 linked to the aperture magnet 410 move in opposite directions to adjust the size of the through hole through which light passes. That is, in this embodiment, the amount of light (diameter of light) flowing into the lens module 40 can be adjusted by supplying power to the aperture coil 420.

Furthermore, feedback control for aperture driving may be applied to the camera module according to this embodiment. The feedback control function for driving the aperture of the camera module according to this embodiment will be explained through the third embodiment. The aperture sensor unit 700 disposed on the support member 600 detects the position of the aperture magnet 410, and the position of the aperture magnet 410 detected by the aperture sensor unit 700 is transmitted to the control unit 50. The control unit determines whether to perform additional movement of the first and second blades 430 and 440 of the aperture unit 400 based on the received detection value. Since this process occurs in real time, more precise aperture driving can be performed in this embodiment.

In the above, just because 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 thus 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 should not be interpreted in an idealized or overly formal sense unless explicitly defined in the present invention.

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 are for illustrative purposes, 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 member 210: bobbin
220: Driving magnet part 310: Housing
320: Driving coil unit 400: Aperture unit
500: Base 600: Support member
700: Aperture sensor unit 800: AF sensor unit

Claims (20)

printed circuit board;
An image sensor disposed on the printed circuit board;
a base disposed on the printed circuit board;
a bobbin disposed on the base;
A lens module coupled to the bobbin;
a driving magnet disposed on the bobbin;
a driving coil facing the driving magnet;
First and second blades that control the amount of light incident on the lens module;
an aperture magnet and an aperture coil that move the first and second blades;
a circuit board electrically connected to the aperture coil; and
Including an aperture sensor that detects the aperture magnet,
The circuit board includes a mounting portion on which the aperture sensor is disposed, and a terminal portion coupled to the printed circuit board,
A camera module wherein the terminal portion of the circuit board is disposed on an opposite side of the mounting portion of the circuit board with respect to the lens module. According to paragraph 1,
A camera module wherein the mounting portion of the circuit board is arranged parallel to an optical axis. According to paragraph 1,
A camera module wherein the terminal portion of the circuit board is disposed parallel to an optical axis. According to paragraph 1,
The aperture sensor is a camera module positioned higher than the terminal portion of the circuit board. According to paragraph 1,
When current is applied to the aperture coil, the aperture magnet moves together with the first and second blades. According to paragraph 1,
When current is applied to the driving coil, the lens module moves together with the first and second blades. According to paragraph 1,
The lens module is a camera module including a plurality of lenses disposed between the first and second blades and the image sensor. According to paragraph 1,
A camera module wherein the mounting portion of the circuit board overlaps the bobbin in a direction perpendicular to the optical axis. According to paragraph 1,
It includes a cover member including a top plate and a side plate,
The side plate of the cover member is a camera module disposed on the base. According to paragraph 1,
A camera module including a guide ball disposed between the base and the bobbin. According to paragraph 1,
Includes a housing disposed between the base and the bobbin,
The circuit board includes a first coupling part coupled to the housing, a second coupling part coupled to the bobbin, and a connecting part connecting the first coupling part and the second coupling part,
The first coupling portion includes a body portion disposed on the upper surface of the lower plate of the housing, and a terminal portion bent and extended downward from the body portion,
The second coupling portion includes a body portion coupled to the lower surface of the bobbin,
A camera module wherein the mounting portion of the circuit board is bent upward and extends from the body portion of the circuit board. According to clause 11,
The housing includes a first side portion and a second side portion disposed opposite to the first side portion,
The bobbin includes a first side portion disposed at a position corresponding to the first side portion of the housing, and a second side portion disposed at a position corresponding to the second side portion of the housing,
The first coupling portion of the circuit board is coupled to the first side portion of the housing,
The second coupling portion of the circuit board is coupled to the second side of the bobbin. According to clause 11,
The connection portion of the circuit board includes a first extension portion extending from the first coupling portion toward the second coupling portion, a second extension portion bent from the first extension portion and extending toward the first coupling portion, and A camera module including a third extension portion bent from the second extension portion and extending to the second coupling portion. According to clause 11,
The first coupling portion of the circuit board includes a first coupling body and a second coupling body that are spaced apart from each other,
The connection portion of the circuit board includes a first connection body and a second connection body that are spaced apart from each other,
The first connector connects the first connector and the second connector,
The second connector is a camera module that connects the second coupling unit to the second coupling unit. According to paragraph 1,
It includes a substrate electrically connected to the driving coil,
The board is a camera module spaced apart from the circuit board. printed circuit board;
a base disposed on the printed circuit board;
a bobbin disposed on the base;
A lens module coupled to the bobbin;
a driving magnet disposed on the bobbin;
a driving coil facing the driving magnet;
An aperture housing coupled to the lens module;
First and second blades disposed on the aperture housing;
an aperture magnet and an aperture coil that move the first and second blades;
a circuit board electrically connected to the aperture coil; and
Including an aperture sensor that detects the aperture magnet,
The circuit board includes a mounting portion on which the aperture sensor is disposed, and a terminal portion coupled to the printed circuit board,
A camera module wherein the terminal portion of the circuit board is disposed on an opposite side of the mounting portion of the circuit board with respect to the lens module. According to clause 16,
A camera module wherein the mounting portion of the circuit board is arranged parallel to an optical axis. According to clause 16,
A camera module wherein the terminal portion of the circuit board is disposed parallel to an optical axis. According to clause 16,
A camera module wherein the mounting portion of the circuit board is disposed higher than the terminal portion of the circuit board. main body;
a display unit disposed on the main body; and
An optical device including the camera module of any one of claims 1 to 19, which is disposed in the main body and takes images or photos.

Images