KR20170123048A - Lens driving device, camera module and optical apparatus - Google Patents

Abstract

According to an embodiment, a lens driving device comprises: a housing; a bobbin placed to be spaced from the housing; a first driving unit placed in the bobbin; a second driving unit placed in the housing, and opposite to the first driving unit; an iris unit placed in the bobbin; and a support member coupled to the bobbin and the housing. The support member is formed with a flexible circuit board. According to an embodiment, the lens driving device has a structure connecting an iris signal connection wire without interference.

Description

[0001] LENS DRIVING DEVICE, CAMERA MODULE, AND OPTICAL APPARATUS [0002]

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

The following description provides background information for the present embodiment and does not describe the prior art.

As the spread of various portable terminals is widely popularized and the wireless Internet service is commercialized, the demands of consumers related to portable terminals are diversified, and various kinds of additional devices are installed in portable terminals.

Among them, there is a camera module which photographs a subject as a photograph or a moving picture. In recent years, there is a high need for a camera function using a new actuator for a camera module. Accordingly, a method of using a variable diaphragm by using a diaphragm actuator is newly emerging. Therefore, there is a need for a technique for interfacing the iris signal line in order to drive the aperture actuator to autofocus (AF, Auto Focus).

In order to solve the above-mentioned problems, the present embodiment is to provide a lens driving apparatus including a structure for interposing a diaphragm signal connecting line for autofocus driving of an IRIS actuator without interference.

Also, a camera module and an optical apparatus including the lens driving apparatus are provided.

The lens driving apparatus according to the present embodiment includes: a housing; A bobbin disposed so as to be spaced apart from the housing; A first driver positioned in the bobbin; A second driver positioned in the housing and facing the first driver; A diaphragm unit disposed in 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 portion coupled to the housing, a second coupling portion coupled to the bobbin, and a coupling portion connecting the first coupling portion and the second coupling portion.

Wherein the housing includes a first side portion and a second side portion located on the side opposite to the first side portion, the bobbin includes a first side portion opposed to the first side portion, a second side portion opposed to the second side portion, The first engagement portion is coupled to the first side portion of the housing, and the second engagement portion is coupled to the second side portion of the bobbin.

Wherein the connecting portion includes a first extending portion extending from the first coupling portion to the second coupling portion, a second extending portion bent from the first extending portion and extending toward the first coupling portion, And a third extension portion bent from the first coupling portion and extending to the second coupling portion.

Wherein the first coupling portion includes first and second coupling bodies that are spaced apart from each other, the coupling portion includes first and second coupling bodies spaced from each other, the first coupling body includes a first coupling body and a second coupling body, 2 coupling portion, and the second coupling body may connect the second coupling body and the second coupling portion.

Wherein the first coupling portion includes a body portion coupled to an upper surface of the lower plate of the housing and a terminal portion extending downwardly from the body portion and the second coupling portion includes a body portion coupled to a lower surface of the bobbin, And a mounting portion extending upwardly from the body portion.

Wherein the diaphragm unit includes a third driving unit, a fourth driving unit opposed to the third driving unit, and first and second shutter units interlocked with the third driving unit, 3 can be moved in the opposite directions by the movement of the driving parts.

The mounting portion may include a sensor portion for sensing a position of the third driving portion.

The lens driving apparatus may further include a substrate electrically connected to the second driving unit and located in the housing, wherein the supporting member is electrically connected to the fourth driving unit, and the substrate is spaced apart from the supporting member .

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

The camera module according to the present embodiment includes: a housing; A bobbin disposed so as to be spaced apart from the housing; A first driver positioned in the bobbin; A second driver positioned in the housing and facing the first driver; A diaphragm unit disposed in 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 the present embodiment includes: a housing; A bobbin disposed so as to be spaced apart from the housing; A first driver positioned in the bobbin; A second driver positioned in the housing and facing the first driver; A diaphragm unit disposed in 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 diaphragm actuator is designed in the form of a leaf spring, so that the influence of the FPCB interference of the diaphragm actuator can be minimized.

1 is a conceptual diagram of a camera module according to a first embodiment of the present invention.
2 is an exploded perspective view illustrating the lens driving apparatus shown in FIG.
FIG. 3 is a perspective view illustrating the diaphragm unit shown in FIG. 1; FIG.
4 is an exploded perspective view illustrating the driving of the diaphragm unit according to FIG.
5 is a configuration diagram showing a diaphragm unit according to the first embodiment of the present invention and its associated configuration.
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 part of the configuration of the lens driving apparatus according to the third embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described with reference to exemplary drawings. In describing the components in the drawings, the same components are denoted by the same reference numerals whenever possible, even if they are displayed on other drawings. In describing the embodiments of the present invention, detailed description of some configurations may be omitted.

In describing the components of the embodiment of the present invention, the terms first and second can be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected" or "coupled" to another component, the component may be directly coupled or coupled to the other component, but another component It should be understood that the elements may be connected or coupled.

The 'optical axis direction' used below is defined as the optical axis direction of the lens module in a state of being coupled to the lens driving device. On the other hand, the " optical axis direction " can be used in combination with the up-and-down direction, the z-

The 'autofocus function' used below is to adjust the distance to the image sensor by moving the lens module in the direction of the optical axis according to the distance of the subject so that a clear image of the subject can be obtained with the image sensor, Function. On the other hand, 'Auto Focus' can be mixed 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 as a 'second driving unit'.

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

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

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

The optical apparatus according to the present embodiment may be applied to a mobile phone, a mobile phone, a smart phone, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants) ), Navigation, and the like, but is not limited thereto, and any device for capturing an image or a photograph is possible.

The optical apparatus according to the present 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 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.

1, a camera module according to a 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, (50) and a power applying unit (60). In the camera module according to the first embodiment of the present invention, the lens driving device, the printed circuit board 10, the image sensor 20, the infrared cut filter 30, the lens module 40, the control unit 50, One or more of the portions 60 may be omitted.

The printed circuit board 10 can support the lens driving device. The image sensor 20 can 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. On the upper side of the sensor holder, a lens driving device can be located. The lens driving device may be located outside the upper surface of the printed circuit board 10. [ The image sensor 20 can be positioned inside the upper surface of the printed circuit board 10. With this structure, light having passed 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 apparatus. On the other hand, a control unit 50 for controlling the lens driving device may be disposed on the printed circuit board 10.

The image sensor 20 can be mounted on the printed circuit board 10. The image sensor 20 may be positioned such that the optical axis of the lens module 40 is aligned with the optical axis. In this way, the image sensor 20 can acquire the 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, and a CID. However, the type of the image sensor 20 is not limited thereto.

The infrared ray filter 30 can block the light of 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 in 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 a central portion of the base 500. The infrared filter 30 may be formed of, for example, a film material or a glass material. The infrared filter 30 may be formed, for example, by coating an infrared ray blocking coating material on a flat optical filter such as a cover glass for protecting an image pickup surface and a cover glass. 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 receives 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 can be coupled to the inside of the lens driving device. The lens module 40 can be screwed with the lens driving device. The lens module 40 can be coupled to the lens driving device by an adhesive (not shown). On the other hand, the light having passed through the lens module 40 can 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 can be accommodated in the first accommodating portion 251 of the bobbin 210. The second lens group 42 can be accommodated in the second accommodating portion 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 diaphragm unit 400 may be positioned between the first lens group 41 and the second lens group 42. A diaphragm unit 400 may be positioned below the first lens group 41. The iris unit 400 may be disposed on the upper portion of the second lens group 42.

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

The power applying section 60 can supply power to the diaphragm coil 420 of the diaphragm unit 400. [ The power applying section 60 can supply power to the diaphragm coil 420 under the control of the control section 50. [ The power applying unit 60 may be incorporated in the control unit 50 and may not be distinguished from the control unit 50. The power application unit 60 may be a power supply unit,

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

FIG. 2 is an exploded perspective view of the lens driving apparatus shown in FIG. 1, FIG. 3 is a perspective view illustrating the diaphragm unit shown in FIG. 1, FIG. 4 is a cross- Fig. 5 is a configuration diagram showing a diaphragm unit according to the first embodiment of the present invention and related configurations. Fig.

However, FIG. 1 is a conceptual diagram, and a configuration may be partially different from FIG. 2 to FIG. In this case, the configuration shown in Fig. 1 can be understood as a modification of the configuration shown in Figs. 2 to 5 with respect to some different configurations.

The lens driving apparatus 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 apparatus 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. To the bobbin 210, a drive magnet unit 220 may be coupled. To the bobbin 210, a diaphragm unit 400 may be coupled. The bobbin 210 may be formed integrally with the diaphragm unit 400. The bobbin 210 can move integrally with the diaphragm unit 400. The bobbin 210 may be positioned below the cover member 100. The bobbin 210 can be received in the inner space of the cover member 100. The bobbin 210 may be coupled to the lens module 40. The outer circumferential surface of the lens module 40 may be coupled to the inner circumferential surface of the bobbin 210. The bobbin 210 can be movably supported with respect to the base 500. The bobbin 210 can move in the direction of the optical axis relative to the housing 310.

The bobbin 210 may include a diaphragm receiving portion 240, a lens receiving portion 250, a first driving portion coupling portion (not shown), and a guide ball coupling portion (not shown).

The bobbin 210 may include an aperture stop 240 for receiving at least a portion of the aperture stop unit 400. The diaphragm accommodating portion 240 can accommodate at least a part of the diaphragm unit 400. With such a structure, the bobbin 210 can move integrally with the diaphragm unit 400. The diaphragm accommodating portion 240 may be formed by recessing a part of one surface of the bobbin 210. The aperture stop 240 may be formed such that a part of the upper surface of the bobbin 210 is depressed downward. The diaphragm housing part 240 may be formed such that a part of one side surface of the bobbin 210 is recessed toward the other side. The diaphragm accommodating portion 240 may be positioned between the first accommodating portion 251 and the second accommodating portion 252. Through such a structure, the diaphragm unit 400 can 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 having a vertically open type on the inner side. 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 thread having a shape corresponding to the thread formed on the outer circumferential surface of the lens module 40 may be formed on the inner circumferential surface of the lens accommodating portion 250. [ That is, the lens accommodating portion 250 can 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 ultraviolet (UV) or an epoxy which is cured by heat. That is, the lens module 40 and the bobbin 210 may be bonded by ultraviolet curing epoxy and / or thermosetting epoxy.

The lens accommodating portion 250 includes a first accommodating portion 251 accommodating the first lens group 41 of the lens module 40 and a second accommodating portion 252 accommodating the second lens group 42 of the lens module 40 2 accommodating portion 252, as shown in FIG. The diaphragm accommodating portion 240 can be positioned between the first accommodating portion 251 and the second accommodating portion 252.

The bobbin 210 may include a first driving portion coupling portion in which the driving magnet portion 220 is disposed. The first driving portion coupling portion may be formed on the outer surface of the bobbin 210. [ The first driving portion coupling portion may be formed such that a part of the outer surface of the bobbin 210 corresponds to the shape of the driving magnet portion 220. The first driving portion coupling portion may be formed on the outer surface of the bobbin 210. [ The first driving portion coupling portion may be formed on only one side of the bobbin 210. [ The first driving portion coupling portion may be formed by recessing one surface of the bobbin 210 in a shape corresponding to the driving magnet portion 220. The first driving portion engaging portion can receive at least a part of the driving magnet portion 220.

The bobbin 210 may include a guide ball coupling portion coupled with the guide ball 230. The guide ball engaging portion can be engaged with the guide ball 230. The guide ball engaging portion can receive a part of the guide ball 230. The guide ball engaging portion may be rounded to receive the guide ball 230 rotatably. The guide ball engaging 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 to accommodate the four guide balls 230, respectively. The plurality of guide ball engaging portions may be disposed apart from each other.

The drive magnet part 220 may be located on the bobbin 210. The driving magnet unit 220 may be coupled to the bobbin 210. [ Through such a structure, the drive magnet unit 220 and the bobbin 210 can move integrally. The drive magnet section 220 can be opposed to the drive coil section 320. With this structure, the driving magnet unit 220 can perform an electromagnetic interaction with the driving coil unit 320. The drive magnet section 220 can move through electromagnetic interaction with the drive coil section 320. The drive magnet unit 220 and the drive coil unit 320 can be located in mutually different places as a modification. 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 positioned between the bobbin 210 and the housing 310. The guide ball 230 may be in contact with the bobbin 210 and the housing 310. With 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 can guide 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 one side. However, the present invention is not limited thereto.

The lens driving apparatus according to the first embodiment of the present invention may include a housing 310, a driving coil part 320, and a substrate 330. However, in the lens driving apparatus according to the first embodiment of the present invention, at least one of the housing 310, the driving coil part 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. The driving coil part 320 may be coupled to the housing 310. The housing 310 may be coupled to the base 500. The housing 310 can 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 molded article in consideration of productivity. The housing 310 may be, for example, a plate-shaped member coupled to one side of the base 500.

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

The housing 310 is opened at the upper side to accommodate at least a part of the bobbin 210 movably in the optical axis direction. The housing 310 may include an upwardly open inner space on the inner side. 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. 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 can be understood as a space formed by the housing 310 and the side plates of the base 500.

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

The housing 310 may include a guide ball engaging portion coupled with the guide ball 230. The guide ball engaging portion can be engaged with the guide ball 230. The guide ball engaging portion can receive a part of the guide ball 230. The guide ball engaging portion may be rounded to receive the guide ball 230 rotatably. The guide ball engaging 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 to accommodate the four guide balls 230, respectively. The plurality of guide ball engaging portions may be disposed apart from each other.

The driving coil part 320 may be located in the housing 310. The driving coil portion 320 can be opposed to the driving magnet portion 220. With this structure, when the power is applied to the driving coil part 320, the driving coil part 320 and the driving magnet part 220 can perform an electromagnetic interaction. That is, when power is applied to the driving coil part 320, the driving magnet part 220 can move. At this time, the drive magnet unit 220 can move integrally with the bobbin 210.

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

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

The cover member 100 can receive the bobbin 210 in the inner space. The cover member 100 can be engaged with the base 500. The cover member 100 can form the appearance of the lens driving device. The cover member 100 may be in the form of a hexahedron having an open bottom. However, the present invention is not limited thereto.

The cover member 100 may be formed of, for example, a metal material. More specifically, the cover member 100 may be formed of a metal plate. In this case, the cover member 100 may block electromagnetic interference (EMI). Because of this feature of the cover member 100, the cover member 100 can be referred to as an EMI shield can. The cover member 100 can prevent the airflow generated from the outside of the lens driving apparatus from flowing into the inside of the cover member 100. [ In addition, the cover member 100 can prevent the 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 whose lower end is engaged with the base 500. The cover member 100 may include an upper plate positioned on the upper side of the bobbin 210. The lower end of the side plate of the cover member 100 can be mounted on the base 500. The cover member 100 may be mounted on the base 500 in such a manner that its inner surface is in close contact with a part or all of the side surface of the base 500. The cover member 100 protects the internal components from external impact and can prevent the penetration of external contaminants. Alternatively, 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. On the other hand, the light introduced through the opening can pass through the lens module 40. At this time, the light having passed through the lens module 40 can be acquired as an image from the image sensor 20.

The lens driving apparatus according to the first embodiment of the present invention may include a 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 diaphragm unit 400 may be positioned between the first lens group 41 and the second lens group 42.

The diaphragm unit 400 may include a diaphragm magnet 410. The diaphragm unit 400 may include a diaphragm coil 420 facing the diaphragm magnet 410. The diaphragm unit 400 may include first and second blades 430 and 440 interlocked with the diaphragm magnet 410. The diaphragm unit 400 may include a slider 450 that moves integrally with the diaphragm magnet 410. The diaphragm unit 400 may include a fixed shaft portion 460 that fixes one side of the first and second blades 430 and 440 to the diaphragm housing 401 to provide a rotation center. However, the configuration of the diaphragm 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 diaphragm magnet 410 can be movably arranged. The diaphragm magnet 410 can be opposed to the diaphragm coil 420. With this structure, the diaphragm magnet 410 can move when the diaphragm coil 420 is energized. When the diaphragm magnet 410 moves, the slider 450 can move together. When the slider 450 is moved, the first and second blades 430 and 440 can be rotated in opposite directions about the fixed shaft 460. The position of the diaphragm magnet 410 can be sensed by the diaphragm sensor unit 700.

The diaphragm coil 420 can be opposed to the diaphragm magnet 410. The lens driving device may include a configuration for supplying power to the diaphragm coil 420. [ The diaphragm coil 420 may be electrically connected to the support member 600 as shown in Fig. Alternatively, the diaphragm coil 420 may be electrically connected to the substrate 330 as shown in Fig. The diaphragm coil 420 generates a magnetic field when power is supplied, and can move the diaphragm magnet 410 through an electromagnetic interaction with the diaphragm magnet 410. The diaphragm coil 420 may be located on the rod 421. [ The rod 421 may be positioned on both sides of the diaphragm magnet 410 as an example.

When the diaphragm magnet 410 moves, the first and second blades 430 and 440 move to adjust the amount of light passing through the diaphragm unit 400. At this time, the first and second blades 430 and 440 can 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 can move in opposite directions due to the movement of the diaphragm magnet 410. The first and second blades 430 and 440 can control the amount of light passing through the lens module 40 by the movement of the diaphragm 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 slider 450 moves integrally with the diaphragm magnet 410, The first and second blades 430 and 440 rotate in opposite directions with respect to the fixed shaft portion 460. 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 can completely open the through hole 402 and can close the through hole 402 step by step. As described above, the first and second blades 430 and 440 are integrally controlled by the diaphragm magnet 410, but the present invention is not limited thereto. The first and second blades 430 and 440 may be individually controlled.

Although the bobbin 210 and the diaphragm unit 400 are described as being separate from each other, the bobbin 210 may be omitted and the lens module 40 may be directly coupled to the diaphragm unit 400. In other words, the lens module 40 can be accommodated in the aperture unit 400.

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

The base 500 can receive the bobbin 210 therein. The base 500 can be engaged with the cover member 100. The 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 can be fixed to the printed circuit board 10 by the adhesive 70 for active aligning. That is, the base 500 can be fixed to the printed circuit board 10 through the active alignment process. At this time, the active alignment process is a process for aligning the optical axis of the lens module 40 fixed to the lens driving device and the image sensor 20 of the printed-circuit board 10, and the adhesive 70 for active- (UV, ultraviolet rays) and can be finally cured by heat. That is, when the optical axis of the lens module 40 and the image sensor 20 are aligned, the base 500 is temporarily attached to the printed circuit board 10, and the camera module in this state is cured can do. Alternatively, the base 500 may be joined to the housing 310 by an adhesive 70 for active aligning. The base 500 may be positioned below the bobbin 210. The base 500 may be positioned below the housing 310. The 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 apparatus according to the first embodiment of the present invention may include a diaphragm sensor unit 700.

The iris sensor unit 700 can sense the position of the diaphragm magnet 410. The iris sensor unit 700 may be, for example, a hall sensor. The iris sensor unit 700 can sense the intensity of the magnetic field of the diaphragm magnet 410. The iris sensor unit 700 can be energized with the support member 600. Information about the diaphragm magnet 410 sensed by the diaphragm sensor unit 700 may be transmitted to the controller 50. [

The lens driving apparatus 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 autofocus feedback. The AF sensor unit 800 can sense the position of the drive magnet unit 220 located on the bobbin 210. [ The AF sensor unit 800 may be disposed on the substrate 330 disposed in the housing 310. The AF sensor unit 800 may be located in a space between the closed curve type driving coil unit 320. The AF sensor unit 800 may include a Hall sensor as an example. At this time, the hall sensor senses the magnetic field of the driving magnet unit 220 and sense the position 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.

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 may include a control unit 50. In the camera module according to the second embodiment of the present invention, the lens driving device, the printed circuit board 10, the image sensor 20, the infrared cut filter 30, the lens module 40, Any one or more can be omitted. In the lens driving apparatus, the printed circuit board 10, the image sensor 20, the infrared cut filter 30, the lens module 40, and the control unit 50 of the camera module according to the second embodiment of the present invention, The description in the first embodiment of the present invention can be applied in analogy. Hereinafter, the camera module according to the second embodiment of the present invention will be described focusing on differences from the first embodiment of the present invention.

In the second embodiment, the cover member 100 can be coupled to the housing 310. In the first embodiment, the cover member 100 is coupled to the printed circuit board 10. However, the present invention 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 can movably support the bobbin 210. [ On the other hand, the support member 600 will be described in detail below with reference to FIGS. 7 to 9. FIG.

In the second embodiment, the lower surface of the housing 310 can be extended 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 can be adhered to each other with an adhesive.

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

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

The lens driving apparatus according to the third embodiment of the present invention includes a cover member 100, a bobbin 210, a driving magnet unit 220, a guide ball 230, a housing 310, a driving coil unit 320, A substrate 330, a diaphragm unit 400, and a diaphragm sensor unit 700. In the lens driving apparatus according to the third embodiment of the present invention, the cover member 100, the bobbin 210, the driving magnet unit 220, the guide ball 230, the housing 310, the driving coil unit 320 , The substrate 330, the iris unit 400, and the iris sensor unit 700 may be omitted. The cover member 100, the bobbin 210, the driving magnet unit 220, the guide ball 230, the housing 310, the driving coil unit 320, and the driving coil unit 320 of the lens driving apparatus according to the third exemplary embodiment of the present invention, The substrate 330, the iris unit 400, and the iris sensor unit 700 can be applied to the description of the first embodiment of the present invention. Hereinafter, the lens driving apparatus according to the third embodiment of the present invention will be described focusing on 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 that faces the first side portion 311 of the housing 310 and a second side portion 212 that faces 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. The drive magnet portion 220 may be located on the first side 211 of the bobbin 210. [ On the first side 211 of the bobbin 210, a guide ball 230 may be positioned. The drive magnet part 220 may be located inside the guide ball 230. The diaphragm magnet 410 of the diaphragm unit 400 may be positioned on the second side 212 of the bobbin 210. [ With this structure, the diaphragm sensor 410 located on the second side portion 312 side of the housing 310 can sense the diaphragm magnet 410. However, the diaphragm magnet 410 may not be exposed to the outside of the bobbin 210.

The bobbin 210 may include a support member coupling portion that is coupled to the support member 600. [ The engaging portion can be engaged with the second engaging portion 620 of the support member 600. As an example, the protrusion (not shown) of the support member coupling portion may be inserted into the groove or hole (not shown) of the second coupling portion 620 of the support member 600 and coupled. At this time, the projections of the support member coupling portion are thermally fused in a state of being inserted into the holes of the second engagement portion 620, so that the support member 600 can be fixed.

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 surface portion 311 may be located on the opposite side of the first side surface portion 311. The first side portion 311 may face the first side portion 211 of the bobbin 210. The second side portion 312 may be opposed to the second side 212 of the bobbin 210.

The housing 310 may include a lower plate 313 and a side plate 314. The lower plate 313 can engage with the support member 600. The lower plate 313 can selectively support the bobbin 210 from below. 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 can function as a lower stopper of the bobbin 210. [ The side plate 314 may 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, a side plate 314 to which the substrate 330 of the plurality of side plates 314 of the housing 310 is coupled may be coupled to the lower plate 313 and the other side plate 314 in a removable manner. At this time, the attachment and detachment can be achieved by sliding coupling. With this structure, the assembly of the substrate 330 with respect to the housing 310 can be facilitated.

The housing 310 may include a support member engaging portion that engages with the support member 600. As an example, the support member engaging portion may include the engaging projection 315. The engaging projection 315 can be inserted into the groove or hole (not shown) of the first engaging portion 610 of the support member 600 and can be engaged. At this time, the coupling protrusion 315 is thermally fused in a state of being inserted into the hole of the first coupling portion 610 to fix the support member 600. The engaging projections 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 apparatus according to the third embodiment may include a support member 600. [

As a comparative example, if the FPCB of the diaphragm actuator is folded in the U shape and disposed on the side of the diaphragm actuator, the strength of the FPCB varies depending on the degree of bending of the spring strength with respect to the FPCB.

The supporting member 600 is a flexible printed circuit board (FPCB) of a diaphragm actuator (which may include a diaphragm magnet 410 and a diaphragm coil 420 in this embodiment) for generating a driving force in the diaphragm unit 400 It may be designed as a plate spring type. With this structure, in this embodiment, the influence of interference of the FPCB of the diaphragm actuator can be reduced as compared with 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, the present invention is not limited thereto. The support member 600 may have elasticity at least in part. The support member 600 may be an elastic member such as a leaf spring as a modification. The support member 600 may be electrically connected to the diaphragm coil 420. The support member 600 can supply a power supplied from the outside through the terminal portion 614 to the diaphragm coil 420. Alternatively, the support member 600 may transmit sensed information to the iris sensor unit 700 through the terminal unit 614. [

The support member 600 may include a first engagement portion 610 coupled to the housing 310. The support member 600 may include a second engagement portion 620 coupled to the bobbin 210. The supporting member 600 may include a connecting portion 630 connecting the first engaging portion 610 and the second engaging 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 engaging portion 610 may be engaged with the engaging projection 315 of the housing 310.

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

The first coupling portion 610 may include a body portion 613 coupled to an upper surface of the lower plate 313 of the housing 310. The body portion 613 can be coupled to the coupling protrusion 315 of the housing 310. [ At least a part 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 engaging portion 610 may include a terminal portion 614 that extends from the body portion 613 downwardly. The terminal portion 614 can be electrically connected to the printed circuit board 10. The terminal portion 614 and the printed circuit board 10 can be coupled by soldering.

The second coupling portion 620 may include a body portion 621 coupled to the bobbin 210 and a mounting portion 622 extending from the body portion 621 and 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 212 of the bobbin 210. That is, the second engaging portion 620 may be located opposite the first engaging portion 610. In other words, the second engaging portion 620 and the first engaging portion 610 may be located apart from each other along the side of the housing 310.

The second coupling portion 620 may include a body portion 623 coupled to a lower surface of the bobbin 210. The body portion 623 can be coupled to the projection of the bobbin 210. At least a part 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 extends upward from the body portion 623. The iris sensor unit 700 may be positioned on the mounting portion 624. At least a part of the mounting portion 624 may be in surface contact with the side surface of the bobbin 210. [ The iris sensor unit 700 may be located in the mounting portion 624 of the second engaging portion 620 of the supporting member 600. [

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

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

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

First, the autofocus function of the camera module according to the present embodiment will be described with reference to the first embodiment. When the power is supplied to the driving coil part 320, the driving magnet part 220 moves relative to the driving coil part 320 by electromagnetic interaction between the driving coil part 320 and the driving magnet part 220 . At this time, the bobbin 210 coupled with the drive magnet unit 220 moves integrally with the drive magnet unit 220. That is, the bobbin 210, to which the lens module 40 is coupled, moves in the optical axis direction (vertical direction, vertical direction) with respect to the housing 310. This movement of the bobbin 210 results in moving the lens module 40 closer to the image sensor 20 or moving away from the image sensor 20. Thus, in this embodiment, power is supplied to the driving coil part 320, As shown in FIG.

On the other hand, in the camera module according to the first embodiment of the present invention, autofocus feedback can be applied for more precise realization of the autofocus function. The AF sensor unit 800 disposed in the housing 310 and provided as a hall sensor senses 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 detects the amount of movement of the bobbin 210 in the z-axis direction or the real-time position of the bobbin 210 And transmits the sensed value to the control unit 50. The control unit 50 determines whether to perform additional movement to the bobbin 210 through the received sensing value. Since the above process is performed 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 the autofocus feedback.

In addition, in the camera module according to the present embodiment, the diaphragm can be driven. The diaphragm magnet 410 is moved relative to the diaphragm coil 420 by the electromagnetic interaction between the diaphragm coil 420 and the diaphragm magnet 410 when power is supplied to the diaphragm coil 420. [ At this time, the first and second blades 430 and 440 interlocking with the diaphragm magnet 410 move in mutually opposite directions to adjust the size of the through hole through which the light passes. That is, in this embodiment, the amount of light (diameter of light) to be supplied to the lens module 40 can be adjusted by supplying power to the diaphragm coil 420.

Further, in the camera module according to the present embodiment, feedback control for the diaphragm drive may be applied. The feedback control function for the diaphragm driving of the camera module according to the present embodiment will be described with reference to the third embodiment. The diaphragm sensor unit 700 disposed on the support member 600 senses the position of the diaphragm magnet 410 and the position of the diaphragm magnet 410 sensed by the diaphragm sensor unit 700 is transmitted to the controller 50. The controller determines whether to perform the additional movement of the first and second blades 430 and 440 of the iris unit 400 based on the received sensing values. Since this process occurs in real time, more precise aperture driving can be performed in this embodiment.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, 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 construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

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

Claims (12)

housing;
A bobbin disposed so as to be spaced apart from the housing;
A first driver positioned in the bobbin;
A second driver positioned in the housing and facing the first driver;
A diaphragm unit disposed in the bobbin; And
And a support member coupled to the bobbin and the housing,
Wherein the support member is formed of a flexible circuit board.
The method according to claim 1,
Wherein the supporting member includes a first engaging portion coupled to the housing, a second engaging portion engaged with the bobbin, and a connecting portion connecting the first engaging portion and the second engaging portion.
3. The method of claim 2,
The housing includes a first side portion and a second side portion located opposite the first side portion,
Wherein the bobbin includes a first side portion facing the first side portion and a second side portion opposite to the second side portion,
Wherein the first engagement portion is coupled to the first side portion of the housing and the second engagement portion is coupled to the second side portion of the bobbin.
The method of claim 3,
Wherein the connecting portion includes a first extending portion extending from the first coupling portion to the second coupling portion, a second extending portion bent from the first extending portion and extending toward the first coupling portion, And a third extending portion bent from the first coupling portion and extending to the second coupling portion.
3. The method of claim 2,
Wherein the first engaging portion includes first and second engaging portions which are spaced apart from each other,
Wherein the connecting portion includes first and second connecting members spaced from each other,
Wherein the first coupling member connects the first coupling member and the second coupling member, and the second coupling member connects the second coupling member and the second coupling member.
3. The method of claim 2,
Wherein the first engaging portion includes a body portion coupled to an upper surface of a lower plate of the housing and a terminal portion extending downwardly from the body portion,
Wherein the second coupling portion includes a body coupled to a lower surface of the bobbin and a mounting portion extending upwardly from the body.
The method according to claim 6,
The diaphragm unit includes a third driving unit, a fourth driving unit facing the third driving unit, and first and second shutter units interlocked with the third driving unit,
Wherein the first and second shutter portions move in mutually opposite directions due to the movement of the third driving portion.
8. The method of claim 7,
And a sensor unit for sensing a position of the third driving unit is disposed in the mounting unit.
8. The method of claim 7,
And a substrate electrically connected to the second driver and located in the housing,
The supporting member is electrically connected to the fourth driving unit,
And the substrate is spaced apart from the support member.
The method according to claim 1,
And a guide ball contacting the bobbin and the housing.
housing;
A bobbin disposed so as to be spaced apart from the housing;
A first driver positioned in the bobbin;
A second driver positioned in the housing and facing the first driver;
A diaphragm unit disposed in the bobbin; And
And a support member coupled to the bobbin and the housing,
Wherein the supporting member is formed of a flexible circuit board.
housing;
A bobbin disposed so as to be spaced apart from the housing;
A first driver positioned in the bobbin;
A second driver positioned in the housing and facing the first driver;
A diaphragm unit disposed in the bobbin; And
And a support member coupled to the bobbin and the housing,
Wherein the support member is formed of a flexible circuit board.

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