KR20230074435A - Lens driving device, camera module and optical apparatus - Google Patents

Abstract

The present embodiment relates to a lens driving device that includes: a housing; a bobbin to which a lens module is coupled and positioned to be spaced apart from the housing; a first driving part located on the bobbin; a second driving part located in the housing and facing the first driving part; and an aperture unit coupled to the bobbin. The bobbin includes an aperture accommodating part that accommodates at least a portion of the aperture unit. Therefore, it is possible to prevent magnetic field interference between the aperture and an autofocus driving part.

Description

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

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

The contents described below provide background information on the present embodiment, but do not describe the prior art.

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

Among them, a typical example is a camera module that takes a picture or video of a subject. Recently, there is a need to implement a digital single lens reflex camera (IRIS) in the mobile market and the miniaturized camera market.

(Patent Document 1) KR 10-2011-0136990 A

In order to solve the above problems, the present embodiment intends to provide a lens driving device in which the diaphragm is integrally structured with the bobbin while magnetic field interference between the diaphragm and the autofocus driver is avoided.

In addition, it is intended to provide a camera module and an optical device including the lens driving device according to the present embodiment.

A lens driving device according to this embodiment includes a housing; a bobbin to which a lens module is coupled and positioned to be spaced apart from the housing; a first driving unit located on the bobbin; a second driving unit located in the housing and facing the first driving unit; and an diaphragm unit coupled to the bobbin, wherein the bobbin may include a diaphragm accommodating portion accommodating at least a portion of the diaphragm unit.

The diaphragm accommodating portion may be formed by recessing a portion of an upper surface of the bobbin downward.

The diaphragm accommodating portion may be formed by recessing a portion of one side surface of the bobbin into the other side.

The diaphragm unit may move integrally with the bobbin.

The bobbin includes a lens accommodating part formed inside the bobbin, wherein the lens accommodating part includes a first accommodating part accommodating the first lens group of the lens module and accommodating the second lens group of the lens module. A second accommodating part may be included, and the diaphragm accommodating part may be located between the first accommodating part and the second accommodating part.

The diaphragm unit includes a third driving unit, a fourth driving unit facing the third driving unit, and first and second blades interlocking with the third driving unit, the first and second blades comprising the first and second driving units. 3 The amount of light passing through the lens module can be adjusted by moving the driving unit.

The lens driving device may further include a support member coupled to the bobbin and the housing, and the support member may include a flexible first substrate.

The first substrate includes a first coupling portion coupled to the upper surface of the bottom plate of the housing, a second coupling portion coupled to the lower surface of the bobbin, and a connection portion connecting the first coupling portion and the second coupling portion. Including, the connecting portion may be bent at least twice.

The second coupling part may include a body part coupled to the bobbin, and a mounting part extending from the body part and bent upward, and a first sensor part for sensing the third driving part may be located in the mounting part.

The lens driving device is electrically connected to the second driving unit and further includes a second substrate positioned in the housing, the first substrate is electrically connected to the fourth driving unit, and the second substrate is It may be spaced apart from the first substrate.

The lens driving device may further include a second sensor unit disposed on the second substrate and sensing the first driving unit.

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

A lens driving device according to this embodiment includes a housing; an aperture unit positioned to be spaced apart from the housing; a first driving unit located in the diaphragm unit; a second driving unit located in the housing and facing the first driving unit; and a support member coupled to the housing and the diaphragm unit, and a lens module may be accommodated in the diaphragm unit.

The diaphragm unit may include a third driving unit, a fourth driving unit facing the third driving unit, and a third driving unit and a fourth driving unit that adjusts the amount of light passing through the lens module by interlocking with at least one of the third driving unit and the fourth driving unit. It may include 1 and 2 blades.

The diaphragm unit includes a first accommodating part accommodating the first lens group of the lens module and a second accommodating part accommodating the second lens group of the lens module, and the first and second blades are configured to It may be located between the first accommodating part and the second accommodating part.

The support member may include a flexible printed circuit board (FPCB).

The lens driving device may include a substrate electrically connected to the second driving unit and located in the housing; a first sensor unit located on the flexible printed circuit board and sensing at least one of the third driving unit and the fourth driving unit; and a second sensor unit located on the substrate and sensing the first driving unit.

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

The camera module according to the present embodiment includes a housing; a bobbin to which a lens module is coupled and positioned to be spaced apart from the housing; a first driving unit located on the bobbin; a second driving unit located in the housing and facing the first driving unit; and an diaphragm unit coupled to the bobbin, wherein the bobbin may include a diaphragm accommodating portion accommodating at least a portion of the diaphragm unit.

The optical device according to the present embodiment includes a housing; a bobbin to which a lens module is coupled and positioned to be spaced apart from the housing; a first driving unit located on the bobbin; a second driving unit located in the housing and facing the first driving unit; and an diaphragm unit coupled to the bobbin, wherein the bobbin may include a diaphragm accommodating portion accommodating at least a portion of the diaphragm unit.

Through this embodiment, it is possible to implement a DSLR camera-level diaphragm in a miniaturized lens driving device.

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 embodying the lens driving device shown in FIG. 1 .
FIG. 3 is a perspective view embodying the diaphragm unit shown in FIG. 1 .
4 is an exploded perspective view for explaining driving of the iris unit according to FIG. 3 .
5 is a configuration diagram showing an diaphragm unit and related components according to a first embodiment of the present invention.
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 some components 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. In describing the reference numerals for the components of each drawing, the same numerals indicate the same components as much as possible, even if they are displayed on different drawings. In addition, in describing the embodiments of the present invention, detailed descriptions of some components may be omitted.

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

The 'optical axis direction' used below is defined as the optical axis direction of the lens module coupled to the lens driving device. On the other hand, the “optical axis direction” may be used interchangeably with a vertical direction, a z-axis direction, and the like.

The 'auto focus function' used below is to adjust the distance to the image sensor by moving the lens module in the optical axis direction according to the distance of the subject so that a clear image of the subject can be obtained from the image sensor. Focusing on the subject defined as a function. Meanwhile, 'auto focus' may 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 a 'first driving unit' and the other may be referred to as a 'second driving unit'.

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

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

Hereinafter, one of the 'substrate 330' and the 'support member 600' may be referred to as a 'first substrate' and the other may be referred to as a 'second substrate'.

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

The optical device according to the present embodiment includes a mobile phone, a mobile phone, a smart phone, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), and a portable multimedia player (PMP). ), navigation, etc., but is not limited thereto, and any device for capturing images or photos is possible.

The optical device according to the present embodiment includes a main body (not shown), a display unit (not shown) disposed on one surface of the main body to display information, and a camera module installed on the main body to take an image or a picture. can do.

Hereinafter, 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 FIG. 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 filter 30, a lens module 40, and a control unit. (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 filter 30, a lens module 40, a controller 50, and power supply Any 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 positioned 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 may be positioned above 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 may be irradiated to the image sensor 20 mounted on the printed circuit board 10 . The printed circuit board 10 may supply power to the lens driving device. Meanwhile, a controller 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 such that an optical axis coincides with the lens module 40 . Through this, the image sensor 20 may obtain light passing through the lens module 40 . The image sensor 20 may output irradiated light as an image. The image sensor 20 may be, for example, a charge coupled device (CCD), a metal oxide semi-conductor (MOS), a CPD, and a CID. However, the type of image sensor 20 is not limited thereto.

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 positioned between the lens module 40 and the image sensor 20 . The infrared filter 30 may be located on a holder member (not shown) 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. For 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 or 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) accommodating the lenses. A 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 may 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 the lens driving device by 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 accommodating part 251 of the bobbin 210 . The second lens group 42 may be accommodated in the second accommodating part 252 of the bobbin 210 . The first lens group 41 and the second lens group 42 may be spaced apart from each other. The first and second blades 430 and 440 of the iris unit 400 may be positioned between the first lens group 41 and the second lens group 42 . An iris unit 400 may be positioned below the first lens group 41 . An aperture unit 400 may be positioned above the second lens group 42 .

The controller 50 may be mounted on the printed circuit board 10 . The controller 50 may be located outside the lens driving device. However, the controller 50 may be located inside the lens driving device. The control unit 50 may control the direction, strength, and amplitude of the current supplied to each component constituting the lens driving device. The controller 50 may perform an auto focus function of the camera module by controlling the lens driving device. Also, the controller 50 may control the iris unit 400 of the lens driving device. The controller 50 may perform feedback control of the auto focus function. In more detail, the control unit 50 receives the position of the bobbin 210 detected by the AF sensor unit 800 and controls 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 may more accurately control the iris unit 400 in real time through positional information of the iris magnet 410 of the iris unit 400 sensed by the iris sensor unit 700 .

The power supply unit 60 may supply power to the diaphragm coil 420 of the diaphragm unit 400 . The power supply unit 60 may supply power to the iris coil 420 under the control of the control unit 50 . Although the power application unit 60 has been described as a separate configuration from the control unit 50 in this embodiment, 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 in which the lens driving device shown in FIG. 1 is embodied, FIG. 3 is a perspective view in which the diaphragm unit shown in FIG. 1 is embodied, and FIG. 4 is an exploded view illustrating driving of the diaphragm unit shown in FIG. A perspective view, and FIG. 5 is a configuration diagram showing the diaphragm unit and related components according to the first embodiment of the present invention.

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

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, at least one of the bobbin 210, the driving magnet unit 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 . The driving magnet part 220 may be coupled to the bobbin 210 . An aperture unit 400 may be coupled to the bobbin 210 . The bobbin 210 may be integrally formed with the iris unit 400 . The bobbin 210 can move integrally with the diaphragm unit 400 . The bobbin 210 may be located below the cover member 100 . The bobbin 210 may be accommodated in the inner space of the cover member 100 . The bobbin 210 may be coupled to the lens module 40 . An outer circumferential surface of the lens module 40 may be coupled to an inner circumferential surface of the bobbin 210 . The bobbin 210 may be movably supported with respect to the base 500 . The bobbin 210 may move in an optical axis direction relative to the housing 310 .

The bobbin 210 may include a stop 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 diaphragm accommodating portion 240 accommodating at least a portion of the diaphragm unit 400 . The diaphragm accommodating portion 240 may accommodate at least a portion of the diaphragm unit 400 . Through this structure, the bobbin 210 can move integrally with the iris unit 400 . The aperture accommodating portion 240 may be formed by recessing a portion of one surface of the bobbin 210 . The aperture accommodating portion 240 may be formed by recessing a portion of the upper surface of the bobbin 210 downward. The aperture accommodating portion 240 may be formed by recessing a portion of one side surface of the bobbin 210 toward the other side. The diaphragm 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 may be positioned between the first lens group 41 and the second lens group 42 . In this case, the diaphragm unit 400 can move integrally with the first lens group 41 and the second lens group 42 .

The bobbin 210 may include a lens accommodating portion 250 formed inside the bobbin 210 . The bobbin 210 may include a lens accommodating part 250 of an upper and lower open type on the inside. The bobbin 210 may include a lens accommodating portion 250 formed inside. The lens module 40 may be coupled to the lens accommodating part 250 . A screw thread having a shape corresponding to a screw thread formed on an outer circumferential surface of the lens module 40 may be formed on an inner circumferential surface of the lens accommodating unit 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 cured by ultraviolet (UV) or heat. That is, the lens module 40 and the bobbin 210 may be bonded by UV curing epoxy and/or heat curing epoxy.

The lens accommodating part 250 includes a first accommodating part 251 accommodating the first lens group 41 of the lens module 40 and a second accommodating part 251 accommodating the second lens group 42 of the lens module 40. Two accommodating parts 252 may be included. A stop accommodating part 240 may be positioned 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 part may be formed on an outer surface of the bobbin 210 . A part of the outer surface of the first driving part coupling part may be formed by being depressed to correspond to the shape of the driving magnet part 220 . The first driving part coupling part may be formed on an outer surface of the bobbin 210 . The first driving part coupling part may be formed only on one surface of the bobbin 210 . The first driving part coupling part may be formed by recessing one surface of the bobbin 210 in 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 part coupled to the guide ball 230 . The guide ball coupling part may be coupled with the guide ball 230 . The guide ball coupling part may accommodate a part of the guide ball 230 . The guide ball coupling part is formed to be round and can accommodate the guide ball 230 rotatably. The guide ball coupling part 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 to accommodate each of the four guide balls 230 . A plurality of guide ball coupling parts may be disposed spaced apart from each other.

The driving magnet part 220 may be located on the bobbin 210 . The driving magnet part 220 may be coupled to the bobbin 210 . Through this structure, the driving magnet part 220 and the bobbin 210 can move integrally. The driving magnet part 220 may face the driving coil part 320 . Through such a structure, the driving magnet unit 220 may interact with the driving coil unit 320 electromagnetically. The driving magnet unit 220 may move through electromagnetic interaction with the driving coil unit 320 . As a modified example, the driving magnet unit 220 and the driving coil unit 320 may be positioned interchangeably. That is, the driving magnet part 220 may be located in the housing 310 and the driving coil part 320 may be located in the bobbin 210 .

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

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, at least one 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 . The housing 310 may be coupled to the base 500 . The housing 310 may be coupled to one side of the base 500. The housing 310 is formed of an insulating material and may be formed as an injection molding product in consideration of productivity. The housing 310 may be a plate-shaped member coupled to one side of the base 500 as an example.

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

The upper side of the housing 310 is open to 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 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 . In addition, the inner circumferential surface of the housing 310 forming the inner space may be spaced apart from the outer circumferential surface of the bobbin 210 . The inner space described above may be understood as a space formed by the side plates of the housing 310 and the base 500 .

The housing 310 may include a second driving unit coupling portion formed on a side surface corresponding to the driving coil unit 320 and accommodating the driving coil unit 320 . The second driving unit coupler may accommodate the driving coil unit 320 . The driving coil unit 320 may be fixed to the second driving unit coupling unit by an adhesive (not shown). Meanwhile, the second driving unit coupling part may be located on the inner circumferential 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 part coupled to the guide ball 230 . The guide ball coupling part may be coupled with the guide ball 230 . The guide ball coupling part may accommodate a part of the guide ball 230 . The guide ball coupling part is formed to be round and can accommodate the guide ball 230 rotatably. The guide ball coupling part 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 to accommodate each of the four guide balls 230 . A plurality of guide ball coupling parts may be disposed 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 such a structure, when power is applied to the drive coil unit 320, the drive coil unit 320 and the drive magnet unit 220 may interact electromagnetically. That is, when power is applied to the driving coil unit 320, the driving magnet unit 220 may move. At this time, the driving magnet part 220 may move integrally with the bobbin 210 .

The substrate 330 may be electrically connected to the driving coil unit 320 . The substrate 330 may 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 unit may be located at the bottom of the board 330 . The terminal unit 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 may accommodate the bobbin 210 in the inner space. The cover member 100 may be coupled to the base 500 . The cover member 100 may 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 thereto.

The cover member 100 may be formed of a metal material as an example. More specifically, the cover member 100 may be provided with a metal plate material. In this case, the cover member 100 may block electromagnetic interference (EMI). Due to such characteristics of the cover member 100, the cover member 100 may be referred to as an EMI shield can. The cover member 100 may block radio waves generated outside the lens driving device from being introduced into the cover member 100 . In addition, the cover member 100 may block radio waves generated inside the cover member 100 from being emitted to the outside of the cover member 100 . However, the material of the cover member 100 is not limited thereto.

The cover member 100 may include an upper plate and a side plate. The cover member 100 may include a side plate having a lower end coupled to the base 500 . The cover member 100 may include a top plate positioned above the bobbin 210 . The lower end of the side plate of the cover member 100 may be mounted on the base 500 . The inner surface of the cover member 100 may be mounted on the base 500 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 at the same time prevent penetration of external contaminants. As a modified example, the lower end of the side plate of the cover member 100 may be directly coupled to the printed circuit board 10 positioned below the base 500 .

The cover member 100 may include an opening formed on the top plate to expose the lens module 40 . The opening may have a shape corresponding to that of 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 the diaphragm unit 400 .

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

The aperture unit 400 may include an aperture magnet 410 . The diaphragm unit 400 may include an diaphragm coil 420 facing the diaphragm magnet 410 . The iris unit 400 may include first and second blades 430 and 440 interlocking with the iris magnet 410 . The aperture unit 400 may include a slider 450 that moves integrally with the aperture magnet 410 . The iris unit 400 may include a fixed shaft portion 460 that fixes one side of the first and second blades 430 and 440 to the iris housing 401 to provide a rotational center. However, the configuration of the iris unit 400 is not limited thereto. The iris unit 400 may be provided in any form capable of adjusting the amount of light passing through the iris unit 400 according to the supply of power.

The aperture magnet 410 may be movably disposed. The aperture magnet 410 may face the aperture coil 420 . Through this structure, the aperture magnet 410 may move when power is applied to the aperture coil 420 . When the aperture magnet 410 moves, the slider 450 may also move together. When the slider 450 moves, the first and second blades 430 and 440 can rotate and move in opposite directions around the fixed shaft portion 460 . The position of the aperture magnet 410 may 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 diaphragm 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 may generate a magnetic field and move the aperture magnet 410 through electromagnetic interaction with the aperture magnet 410 . The aperture coil 420 may be positioned on the rod 421 . The rods 421 may be respectively located on both sides of the aperture magnet 410 as an example.

When the iris magnet 410 moves, the first and second blades 430 and 440 move to adjust the amount of light passing through the iris unit 400 . In this case, the first and second blades 430 and 440 may adjust the amount of light passing through the iris 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 by the movement of the aperture magnet 410 . The first and second blades 430 and 440 may adjust the amount of light passing through the lens module 40 by moving the aperture magnet 410 . More specifically, when power is supplied to the diaphragm coil 420, the periphery of the rod 421 becomes an electromagnet to move the diaphragm magnet 410, the diaphragm magnet 410 and the slider 450 move integrally, and the slider 450 ) According to the movement, the first and second blades 430 and 440 rotate around the fixed shaft portion 460 in opposite directions to each other. 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 diaphragm housing 401 . The first and second blades 430 and 440 may completely open the through hole 402 and may close the through hole 402 step by step. In the above, it has been described that the first and second blades 430 and 440 are integrally controlled by the aperture magnet 410, but is not limited thereto. The first and second blades 430 and 440 may be individually controlled.

Although the bobbin 210 and the aperture unit 400 have been described as separate configurations, 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 may be accommodated in the iris unit 400 .

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

The base 500 may 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 disposed on the printed circuit board 10 . The base 500 may be fixed to the printed circuit board 10 by the adhesive 70 for active alignment. That is, the base 500 may 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 axis of the image sensor 20 of the printed circuit board 10 and the lens module 40 fixed to the lens driving device, and the adhesive 70 for active alignment is applied to the UV light. (UV, ultraviolet rays) and can be hardened by heat. That is, with the lens module 40 and the optical axis of the image sensor 20 aligned, the base 500 is temporarily cured on the printed circuit board 10, and the camera module in this state is cured in an oven to complete the assembly can do. Alternatively, the base 500 may be coupled to the housing 310 by an active alignment adhesive 70 . The base 500 may be located below the bobbin 210 . The base 500 may be located on the lower side of the housing 310 . A printed circuit board 10 may be positioned below 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 may detect the position of the aperture magnet 410 . The aperture sensor unit 700 may be, for example, a hall sensor. The diaphragm sensor unit 700 may sense the strength of the magnetic field of the diaphragm magnet 410 . The iris sensor unit 700 may be electrically connected to the support member 600 . Information about the aperture magnet 410 sensed by the aperture sensor unit 700 may be transmitted to the controller 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 may be used for auto focus feedback. The AF sensor unit 800 may detect the position of the driving magnet unit 220 located on the bobbin 210 . The AF sensor unit 800 may be located on the substrate 330 disposed on the housing 310 . The AF sensor unit 800 may be located in a space between the closed curve drive coil units 320 . The AF sensor unit 800 may include a hall sensor as an example. In this case, the hall sensor may detect the position of the driving magnet unit 220 by sensing the magnetic field of the driving magnet unit 220 .

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

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 filter 30, a lens module 40, and A controller 50 may be included. However, in the camera module according to the second embodiment of the present invention, among the lens driving device, the printed circuit board 10, the image sensor 20, the infrared cut filter 30, the lens module 40, and the controller 50 Any one or more may be omitted. Meanwhile, the lens driving device of the camera module according to the second embodiment of the present invention, the printed circuit board 10, the image sensor 20, the infrared cut filter 30, the lens module 40, and the control unit 50 For this, the description in the first embodiment of the present invention can be inferred. Hereinafter, differences between the camera module according to the second embodiment of the present invention and the first embodiment of the present invention will be mainly described.

In the second embodiment, the cover member 100 may be coupled to the housing 310. This is different from the case where the cover member 100 is coupled to the printed circuit board 10 in the first embodiment. 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 with reference to FIGS. 7 to 9 below.

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 bonded by an adhesive.

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

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

A lens driving device according to a 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 diaphragm unit 400, and the diaphragm sensor unit 700 may be omitted. Meanwhile, 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 of the lens driving device according to the third embodiment of the present invention , the substrate 330, the diaphragm unit 400, and the diaphragm sensor unit 700 may be inferred from the description in the first embodiment of the present invention. Hereinafter, differences between the lens driving device according to the third embodiment of the present invention and the first embodiment will be mainly described.

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 portion 212 may be located on the opposite side of the first side portion 211 . The driving magnet part 220 may be located on the first side part 211 of the bobbin 210 . A guide ball 230 may be positioned on the first side portion 211 of the bobbin 210 . The driving magnet part 220 may be located inside the guide ball 230 . The iris magnet 410 of the iris unit 400 may be positioned on the second side part 212 of the bobbin 210 . Through this structure, the iris sensor unit 700 positioned on the side of the second side part 312 of the housing 310 may sense the iris 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, the protrusion (not shown) of the support member coupling part may be inserted into and coupled to a groove or hole (not shown) of the second coupling part 620 of the support member 600 . At this time, the protrusion of the support member coupling portion may be heat-sealed while being 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 positioned opposite the first side portion 311 . The second side part 311 may be located on the opposite side of the first side part 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 coupled to the support member 600 . The lower plate 313 may optionally support the bobbin 210 from the lower side. That is, when the bobbin 210 descends as much as possible, the lower surface of the bobbin 210 may 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 that of the bobbin 210 . Some of the side plates 314 of the housing 310 may be detachably coupled. As an example, the side plate 314 to which the substrate 330 is coupled among the plurality of side plates 314 of the housing 310 may be coupled to the lower plate 313 and the other side plate 314 in a detachable manner. At this time, the detachable method may be by sliding coupling. Through such a structure, assembly of the substrate 330 to the housing 310 may 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 part 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 fix the support member 600 by being heat-sealed while being inserted into the hole of the first coupling portion 610 . The coupling protrusion 315 may be formed on an upper surface of the lower plate 313 of the housing 310 .

The substrate 330 may be coupled to an 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, when the FPCB of the aperture actuator is folded in a 'U' shape and placed on the side of the aperture actuator, the spring strength of the FPCB is very high and the strength of the FPCB varies depending on the degree of bending, making it difficult to control.

The support member 600 includes a flexible printed circuit board (FPCB) of an aperture actuator (in this embodiment, an aperture magnet 410 and an aperture coil 420 may be included) generating a driving force in the aperture unit 400. It may be designed in the form of a leaf spring. Through this structure, in this embodiment, the interference effect of the FPCB of the aperture actuator can be reduced 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. However, it is not limited thereto. The support member 600 may have elasticity in at least a part. The support member 600 may be an elastic member such as a leaf spring as a modified example. The support member 600 may be electrically connected to the iris coil 420 . The support member 600 may supply power supplied from the outside through the terminal unit 614 to the iris coil 420 . Alternatively, the support member 600 may transfer sensed information to the iris sensor unit 700 through the terminal unit 614 .

The support member 600 may include a first coupling part 610 coupled to the housing 310 . The support member 600 may include a second coupling part 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 coupler 610 may be coupled to the housing 310 . The first coupling part 610 may be coupled to the first side part 311 of the housing 310 . The first coupling part 610 may be coupled to the upper surface of the lower plate 313 of the housing 310 . The first coupling part 610 may be coupled with the coupling protrusion 315 of the housing 310 .

The first coupling part 610 may include first and second coupling bodies 611 and 612 spaced apart from each other. A terminal portion 614 may be formed on each of the first and second assemblies 611 and 612 . Through this structure, a larger number of conductive lines can be exposed to the outside. A substrate 330 may be positioned between the first and second assemblies 611 and 612 . As an example, three terminals spaced apart from each other may be formed in each of the first and second assemblies 611 and 612 . That is, the first coupler 610 may include a total of six terminals spaced apart from each other. In this case, two terminals may be used to supply power to the aperture coil 420, and the remaining four terminals may be used to supply power to the aperture sensor unit 700 and transmit/receive information.

The first coupling part 610 may include a body part 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 come into surface contact with the upper surface of the lower plate 313 of the housing 310 . The first coupling part 610 may include a terminal part 614 that is bent downward from the body part 613 and extends. The terminal unit 614 may be electrically connected to the printed circuit board 10 . Connection between the terminal unit 614 and the printed circuit board 10 may be performed by soldering.

The second coupling part 620 may include a body part 621 coupled to the bobbin 210 and a mounting part 622 extending from the body part 621 and bending upward.

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

The second coupling part 620 may include a body part 621 coupled to the lower surface of the bobbin 210 . The body part 621 may be coupled to the protrusion of the bobbin 210 . At least a portion of the body portion 621 may be in surface contact with the lower surface of the bobbin 210 . The second coupling part 620 may include a mounting part 622 that is bent upward and extended from the body part 621 . An aperture sensor unit 700 may be positioned in the mounting unit 622 . At least a portion of the mounting unit 622 may be in surface contact with the side surface of the bobbin 210 . The aperture sensor unit 700 may be located in the mounting unit 622 of the second coupling unit 620 of the support member 600 . The mounting unit 622 may be disposed parallel to the optical axis as shown in FIG. 9 .

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

The connecting portion 630 may include first and second connecting bodies 631 and 632 spaced apart from each other. The first coupling body 631 may connect the first coupling body 611 and the second coupling portion 620 . The second coupling body 632 may connect the second coupling body 612 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 unit 630 may include a total of six conductive lines spaced apart from each other. In this case, 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 .

Hereinafter, the operation of the camera module according to the present embodiment will be described.

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

Meanwhile, in the camera module according to the first embodiment of the present invention, auto focus feedback may be applied to more precisely realize the auto focus function. The AF sensor unit 800 disposed in the housing 310 and provided as a hall sensor detects a magnetic field of the driving magnet unit 220 fixed to the bobbin 210 . Therefore, when the bobbin 210 performs a relative movement with respect to the housing 310, the AF sensor unit 800 moves the bobbin 210 in the z-axis direction or the real-time position of the bobbin 210 through the aforementioned method. is sensed and the detected value is transmitted to the control unit 50. The control unit 50 determines whether or not to additionally move the bobbin 210 through the received sensing value. Since this process occurs in real time, the auto focus function of the camera module according to the first embodiment of the present invention can be performed more precisely through auto focus feedback.

Also, in the camera module according to the present embodiment, the diaphragm may be driven. When power is supplied to the aperture coil 420, the aperture magnet 410 moves with respect 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 interlocking with the iris magnet 410 move in opposite directions to adjust the size of the through hole through which light passes. That is, in this embodiment, power is supplied to the aperture coil 420 to adjust the amount of light (diameter of light) introduced into the lens module 40 .

Furthermore, in the camera module according to the present embodiment, feedback control for driving the diaphragm may be applied. The feedback control function for driving the diaphragm of the camera module according to the present embodiment will be described through the third embodiment. The iris sensor unit 700 disposed on the support member 600 detects the position of the iris magnet 410 and transmits the position of the iris magnet 410 sensed by the iris sensor unit 700 to the control unit 50 . The control unit determines whether or not to additionally move the first and second blades 430 and 440 of the iris unit 400 based on the received detection value. Since this process occurs in real time, more precise driving of the diaphragm can be performed in the present embodiment.

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

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

100: cover member 210: bobbin
220: driving magnet part 310: housing
320: drive coil unit 400: aperture unit
500: base 600: support member
700: aperture sensor unit 800: AF sensor unit

Claims (20)

housing;
a bobbin disposed within the housing;
a lens module coupled to the bobbin;
a drive magnet disposed on the bobbin;
a drive coil interacting with the drive magnet;
first and second blades disposed on the lens module;
an aperture magnet for moving the first and second blades;
an aperture coil interacting with the aperture magnet;
a first substrate electrically connected to the aperture coil; and
An aperture sensor detecting the aperture magnet;
The aperture sensor is disposed between the bobbin and the first substrate in a direction perpendicular to an optical axis. According to claim 1,
The first substrate includes a mounting portion in which the aperture sensor is disposed,
The aperture sensor is disposed between the bobbin and the mounting part in the direction perpendicular to the optical axis. According to claim 1,
The first substrate includes a mounting portion in which the aperture sensor is disposed,
The mounting unit is a camera module disposed parallel to the optical axis. According to claim 1,
The first and second blades are camera modules that move together with the lens module. According to claim 1,
The diaphragm sensor does not overlap with the diaphragm magnet in a direction parallel to the optical axis. According to claim 1,
The diaphragm sensor does not overlap with the diaphragm coil in a direction parallel to the optical axis. According to claim 1,
printed circuit board; and
An image sensor disposed on the printed circuit board;
The lens module includes a first lens disposed between the first and second blades and the image sensor. According to claim 7,
The first lens is a camera module including a plurality of lenses. According to claim 1,
A camera module in which the amount of light passing through the lens module is controlled by an interaction between the diaphragm magnet and the diaphragm coil. According to claim 1,
Including an AF sensor for sensing the driving magnet,
The AF sensor is disposed in the driving coil camera module. According to claim 10,
The AF sensor is disposed in a space within a closed curve shape of the driving coil. According to claim 2,
The mounting portion of the first substrate overlaps the bobbin in the direction perpendicular to the optical axis. According to claim 1,
The camera module wherein the first substrate includes a flexible circuit board. According to claim 1,
Including a cover member including a top plate and a side plate,
The aperture sensor is disposed within the cover member. According to claim 1,
A camera module including a guide ball disposed between the housing and the bobbin. According to claim 15,
The guide ball camera module guides the movement of the bobbin in the optical axis direction. According to claim 1,
The lens module includes a lens barrel and a plurality of lenses disposed in the lens barrel,
The first and second blades are disposed on the lens barrel camera module. housing;
a bobbin disposed within the housing;
a lens module coupled to the bobbin;
a drive magnet disposed on the bobbin;
a drive coil facing the drive magnet;
first and second blades disposed on the lens module;
an aperture magnet and an aperture coil for moving the first and second blades;
FPCB electrically connected to the aperture coil; and
An aperture sensor detecting the aperture magnet;
When a current is applied to the driving coil, the lens module and the first and second blades move together;
The aperture sensor is disposed between the bobbin and the FPCB in a direction perpendicular to an optical axis. main body;
a display disposed on the main body; and
An optical device comprising the camera module of any one of claims 1 to 18 disposed on the main body. housing;
a bobbin disposed within the housing;
a lens module coupled to the bobbin;
a drive magnet disposed on the bobbin; and
A camera module including a driving coil interacting with the driving magnet.

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