KR20160131367A - Lens driving unit, camera module and optical apparatus - Google Patents

Abstract

According to the present invention, a lens driving unit comprises: a first driving unit; a bobbin integrally moved with the first driving unit; a second driving unit placed to face the first driving unit and moving the first moving unit through interaction with the first driving unit; a sensor to detect motion of the bobbin with respect to the second driving unit; a soft sensor mounting unit combined with the sensor; a sensor mounting groove formed in the bobbing and receiving the sensor mounting unit; and a guide unit to make the sensor mounting unit maintain a shape corresponding to at least a part of the shape of the sensor mounting groove. Through the present invention, it can be prevented that a support member is pressed by a flexible substrate having a sensor for auto-focus feedback control mounted thereon.

Description

[0001] The present invention relates to a lens driving unit, a camera module,

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

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.

On the other hand, recently, a camera module having an auto focus (AF) function is used. Furthermore, a camera module using an AF feedback control is also used to provide a more precise autofocus function. In order to perform the above-mentioned autofocus feedback control, a sensor for sensing the movement of the bobbin moving integrally with the lens module is required. However, it is difficult to mount the sensor within a space constraint.

In particular, the structure for mounting the sensor has a problem in that a dynamic tilt or a static tilt is generated in the bobbin connected to the elastic member by pressing the elastic member connected to the sensor in order to supply power to the sensor .

In order to solve the above problem, it is desirable to provide a lens driving unit having a sensor fixing structure for autofocus feedback control.

More specifically, it is desirable to provide a lens driving unit that prevents a soft substrate on which a sensor is mounted from pressing the upper support member.

Also, there is a need to provide a camera module and an optical apparatus that prevent the occurrence of a tilt by using the lens driving unit to secure the performance of AF and OIS functions.

In order to solve the above problems, a lens driving unit according to an embodiment of the present invention includes: a first movable part; A bobbin moving integrally with the first movable part; A second movable part positioned to face the first movable part and moving the first movable part through interaction with the first movable part; A sensor for sensing movement of the bobbin relative to the second movable part; A flexible sensor mount to which the sensor is coupled; A sensor mounting groove formed on the bobbin and having the sensor mounting portion; And the guide mounting portion is provided to hold the shape corresponding to the shape of at least a part of the sensor mounting groove.

The guide portion includes a groove portion which is located in the sensor mounting groove and to which the sensor mounting portion is coupled, and the width of the groove portion may be smaller than the width of the sensor mounting portion.

The guide part may include a first coupling part located at one end of the sensor mounting part and a second coupling part located at the other end of the sensor mounting part and coupled with the first coupling part.

According to another aspect of the present invention, there is provided a lens driving unit comprising: a first movable part; A bobbin moving integrally with the first movable part; A second movable part positioned to face the first movable part and moving the first movable part through interaction with the first movable part; A sensor for sensing movement of the bobbin relative to the second movable part; A flexible sensor mount to which the sensor is coupled; And a sensor mounting groove formed on the bobbin, wherein the sensor mounting portion is located, and the width of the sensor mounting groove may be smaller than the width of the sensor mounting portion at least in part.

The sensor mounting portion may be interference fit with at least a part of the sensor mounting groove.

A housing in which the second movable part is located; And a support member for elastically connecting the bobbin and the housing, and a terminal portion electrically connected to the support member may be disposed on the sensor mounting portion.

The support member may include an outer portion coupled with the housing, an inner portion coupled with the bobbin, and a coupling portion coupled with the outer portion and the inner portion.

The inner side includes a groove, and the bobbin may include a protrusion inserted into the groove.

The sensor mounting portion includes a flexible circuit board on which the sensor is mounted. The flexible circuit board may be provided with four terminal portions for supplying power to the sensor and transmitting and receiving signals.

A housing in which the second movable part is located; And a lower supporting member for elastically connecting a lower portion of the bobbin and a lower portion of the housing. The lower supporting member may be separately provided to supply power to the first moving portion.

And an upper support member elastically connecting the upper portion of the bobbin and the upper portion of the housing, wherein the upper support member is divided into six pieces so as to be connected to the four terminal portions and the pair of lower support members, have.

A base positioned below the housing; And a side support member elastically connecting the base and the housing, wherein the side support member can be electrically connected to the upper support member.

The second movable part includes a magnet, and the sensor may include a hall sensor for sensing a magnetic force of the magnet.

According to another embodiment of the present invention, there is provided a lens driving unit comprising: a first movable part; A bobbin moving integrally with the first movable part; A second movable part positioned to face the first movable part and moving the first movable part through interaction with the first movable part; A sensor for sensing movement of the bobbin relative to the second movable part; And a flexible sensor mount coupled to the bobbin, wherein one end of the sensor mount is coupled to the other end of the sensor mount.

The sensor mounting part has a strip shape and has a first coupling part located at one end in the longitudinal direction of the strip-shaped sensor mounting part. And a second coupling hole located at the other end of the sensor mounting portion and having a shape corresponding to the first coupling hole.

Wherein the first engaging portion includes a first engaging projection located at one side outer end of the sensor mounting portion and a first engaging recess located inside the one side outer end of the sensor mounting portion, And a second coupling groove formed on an inner side of the other side end of the first coupling groove and adapted to receive the first coupling projection.

The sensor mounting portion may have a circular cross-section in a state where one end and the other end are engaged.

A camera module according to an embodiment of the present invention includes: a lens module; A first movable part; A bobbin to which the first movable part is coupled to an outer circumferential surface and the lens module is coupled to an inner circumferential surface; A second movable part positioned to face the first movable part and moving the first movable part through interaction with the first movable part; A sensor for sensing movement of the bobbin relative to the second movable part; A flexible sensor mounting portion on which the sensor is mounted, the flexible sensor mounting portion being located on the bobbin; And a sensor mounting groove formed on the bobbin and having the sensor mounting portion. The sensor mounting portion may include a guide portion configured to maintain a shape corresponding to at least part of the shape of the sensor mounting groove.

At least one of the first moving part and the second moving part includes a coil and a controller for applying power to the coil, and the controller controls the power supplied to the coil through the sensing value sensed by the sensor Can be controlled.

An optical apparatus according to an embodiment of the present invention includes a main body, a display unit disposed on one side of the main body to display information, and a camera module mounted on the main body to photograph an image or a photograph, A bobbin having a first movable part coupled to an outer circumferential surface thereof and a lens module coupled to an inner circumferential surface thereof; A second movable part positioned to face the first movable part and moving the first movable part through interaction with the first movable part; A sensor for sensing movement of the bobbin relative to the second movable part; A flexible sensor mounting portion on which the sensor is mounted, the flexible sensor mounting portion being located on the bobbin; And a sensor mounting groove formed on the bobbin and having the sensor mounting portion. The sensor mounting portion may include a guide portion configured to maintain a shape corresponding to at least part of the shape of the sensor mounting groove.

According to the present invention, it is possible to prevent the support member from being pressed by the flexible substrate on which the sensor for the autofocus feedback control is mounted.

That is, it is possible to prevent the dynamic tilt and the static tilt which are generated as the support member is pressed.

1 is a perspective view showing a lens driving unit according to an embodiment of the present invention.
2 is an exploded perspective view showing a lens driving unit according to an embodiment of the present invention.
3 is a plan view and a partial enlarged view showing a part of the configuration of a lens driving unit according to an embodiment of the present invention.
4 is a plan view showing a partial structure of a lens driving unit according to an embodiment of the present invention.
5 is a conceptual diagram showing a sensor mounting portion of a lens driving unit according to another embodiment of the present invention.
6 is a plan view showing a part of the structure of the lens driving unit according to the embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may 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", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

As used herein, the term "PCB" refers to a printed circuit board as an abbreviation of a printed circuit board. In the following description, "FPCB" refers to a flexible printed circuit board as an abbreviation of a flexible printed circuit board.

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

The optical apparatus according to an exemplary embodiment of the present invention 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) Portable Multimedia Player), navigation, and the like, but is not limited thereto, and any device for capturing images or photographs is possible.

An optical apparatus according to an embodiment of the present invention includes a main body (not shown), a display unit (not shown) disposed on one side of the main body to display information, (Not shown) having a module (not shown).

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

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

The lens module may include one or more lenses (not shown) and a lens barrel for accommodating the one or more lenses. However, one configuration of the lens module is not limited to the lens barrel, and any structure can be used as long as it can support one or more lenses. The lens module can be coupled to the lens driving unit 10 and move together with the lens driving unit 10. [ The lens module can be screwed with the lens driving unit 10 as an example. The lens module may be coupled to the inside of the lens driving unit 10 as an example. On the other hand, the light having passed through the lens module can be irradiated to the image sensor.

The infrared cutoff filter can block the light of the infrared region from entering the image sensor. The infrared cut filter may be located, for example, between the lens module and the image sensor. The infrared cut filter may be installed in a base 500 to be described later, and may be coupled to a holder member (not shown). The infrared filter may be mounted in a hollow hole 510 formed at the center of the base 500. The infrared filter may be formed of a film material or a glass material as one embodiment. On the other hand, the infrared ray filter may be formed by coating an infrared ray blocking coating material on a plate-shaped optical filter such as a cover glass for protecting an image pickup surface or a cover glass.

The printed circuit board can support the lens driving unit 10. [ An image sensor may be mounted on the printed circuit board. In more detail, the lens driving unit 10 is located outside the upper surface of the printed circuit board, and the image sensor may be positioned inside the upper surface of the printed circuit board. With this structure, the light passing through the lens module coupled to the inside of the lens driving unit 10 can be irradiated to the image sensor mounted on the printed circuit board. The printed circuit board can supply power to the lens driving unit 10. [ On the other hand, a control unit for controlling the lens driving unit 10 may be disposed on the printed circuit board.

The image sensor may be mounted on a printed circuit board. The image sensor may be positioned such that the optical axis and the lens module are aligned. Thereby, the image sensor can acquire light passing through the lens module. The image sensor can output the irradiated light as an image. The image sensor can be, for example, a charge coupled device (CCD), a metal oxide semiconductor (MOS), a CPD and a CID. However, the type of image sensor is not limited thereto.

The control unit may be mounted on a printed circuit board. On the other hand, the control unit may be located inside the lens driving unit 10. [ The control unit can control the direction, intensity, and amplitude of the current supplied to each of the components constituting the lens driving unit 10. [ The control unit controls the lens driving unit 10 to perform at least one of the autofocus function and the camera shake correction function of the camera module. That is, the control unit can control the lens driving unit 10 to move the lens module in the optical axis direction or tilt it in the direction perpendicular to the optical axis direction. Further, the control unit may perform feedback control of the autofocus function and the shake correction function.

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

2 is an exploded perspective view illustrating a lens driving unit according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of a lens driving unit according to an embodiment of the present invention FIG. 4 is a plan view showing a part of the configuration of the lens driving unit according to the embodiment of the present invention. FIG.

1 to 4, a lens driving unit 10 according to an embodiment of the present invention includes a cover member 100, a first mover 200, a second mover 300, a stator 400, A base 500, a support member 600, a sensing unit 700, and a sensor mounting groove 800. In the lens driving unit 10 according to an embodiment of the present invention, the cover member 100, the first mover 200, the second mover 300, the stator 400, the base 500, At least one of the member 600, the sensing unit 700, and the sensor mounting groove 800 may be omitted.

The cover member 100 can form an appearance of the lens driving unit 10. [ 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 include an upper surface 101 and side surfaces 102 extending downward from the outer side of the upper surface 101. On the other hand, the cover member 100 can be mounted on the upper portion of the base 500. The first mover 200, the second mover 300, the stator 400, and the support member 600 may be positioned in the inner space defined by the cover member 100 and the base 500. [ The cover member 100 may be mounted on the base 500 in close contact with a part or all of the side surface of the base 500 to be described later. With such a structure, the cover member 100 can protect the internal components from an external impact and have a function of preventing external contaminants from penetrating.

The cover member 100 may be formed of a metal material as an example. More specifically, the cover member 100 may be formed of a metal plate. In this case, the cover member 100 can block radio interference. That is, the cover member 100 can prevent the airflow generated from the outside of the lens driving unit 10 from flowing into 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 opening 110 formed in the upper surface 101 to expose the lens module. The opening 110 may be formed in a shape corresponding to the lens module. That is, light introduced through the opening 110 can pass through the lens module. On the other hand, light having passed through the lens module can be transmitted to the image sensor.

The first movable element 200 may include a bobbin 210 and a first movable part 220. The first movable element 200 can be coupled with a lens module which is a component of the camera module. That is, the lens module may be located inside the first mover 200. In other words, the outer peripheral surface of the lens module can be coupled to the inner peripheral surface of the first movable element 200. On the other hand, the first movable element 200 can flow integrally with the lens module through interaction with the second movable element 300. That is, the first movable element 200 can move the lens module.

The first movable element 200 may include a bobbin 210. The first movable part 200 may include a first movable part 220 coupled with the bobbin 210.

The bobbin 210 may be coupled to a lens module. More specifically, the outer circumferential surface of the lens module may be coupled to the inner circumferential surface of the bobbin 210. The first movable part 220 may be coupled to the bobbin 210. The lower portion of the bobbin 210 may be coupled to the lower support member 620 and the upper portion of the bobbin 210 may be coupled to the upper support member 610. The bobbin 210 may be located inside the housing 310. The bobbin 210 may flow relative to the housing 310.

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

The bobbin 210 may include a sensor mounting groove 800 to which the first sensor unit 710 is coupled. The sensor mounting groove 800 may be formed on the outer circumferential surface of the bobbin 210 in a shape corresponding to the first sensor unit 710. That is, the first sensor unit 710 may be coupled to the sensor mounting groove 800. The first sensor unit 710 coupled to the sensor mounting groove 800 moves integrally with the bobbin 210 and detects the movement of the bobbin 210 by sensing the second movable part 320 mounted on the housing 310 Sensing can be performed.

The bobbin 210 may include a first movable portion engaging portion 212 in which the first movable portion 220 is wound or mounted. The first movable part coupling part 212 may be formed integrally with the outer surface of the bobbin 210. [ The first movable part coupling part 212 may be continuously formed along the outer surface of the bobbin 210 or spaced apart from the bobbin 210 at predetermined intervals. The first movable part coupling part 212 may include a depression formed by recessing a part of the outer surface of the bobbin 210. The first movable part 220 may be positioned on the first movable part 212 and the first movable part 220 located on the first movable part 212 may be positioned on the lower side of the first movable part 212. [ As shown in Fig.

The bobbin 210 may include an upper engagement portion 213 coupled with the upper support member 610. The upper engagement portion 213 can be engaged with the inner side portion 612 of the upper support member 610. As an example, the upper coupling portion 213 provided as a projection may be inserted into the groove of the inner side portion 612 and coupled thereto. On the other hand, protrusions are provided on the upper support member 610, and grooves are provided on the bobbin 210 so that both are coupled. As shown in FIG. 2, the bobbin 210 may include a total of four upper coupling portions 213. Meanwhile, the bobbin 210 may include a lower coupling portion (not shown) coupled to the lower support member 620. The lower coupling portion formed at the lower portion of the bobbin 210 may be coupled to the inner side portion 622 of the lower support member 620. As an example, the lower coupling portion provided as a projection can be inserted into the groove of the inner side portion 622 and coupled thereto.

The first movable part 220 may be positioned opposite to the second movable part 320 of the second mover 300. The first movable part 220 can move the bobbin 210 with respect to the housing 310 through electromagnetic interaction with the second movable part 320. The first movable part 220 may include a coil. The coil may be wound on the outer surface of the bobbin 210 by being guided by the first movable part engaging part 212. In addition, the coil may be disposed on the outer surface of the bobbin 210 so that four coils are independently provided and two adjacent coils are formed at an angle of 90 DEG with respect to each other. When the first movable part 220 includes a coil, the power supplied to the coil may be supplied through the lower supporting member 620. [ At this time, the lower supporting member 620 may be provided as a pair for power supply to the coils. Meanwhile, the first movable part 220 may include a pair of lead wires (not shown) for power supply. In this case, each of the pair of outgoing lines of the first movable part 220 can be electrically coupled to each of the pair of lower side support members 620. On the other hand, when power is supplied to the coil, an electromagnetic field may be formed around the coil. In addition, the first movable part 220 may include a magnet. In this case, the second movable part 320 may be provided as a coil.

The second mover 300 may be located outside the first mover 200 and opposed to the first mover 200. The second mover 300 can be supported by the base 500 to be movable in a lower direction. The second mover 300 may be located in the inner space of the cover member 100. [

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

The housing 310 may be formed in a shape corresponding to the inner surface of the cover member 100 forming the outer appearance of the lens driving unit 10. [ In addition, 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 disposed at a distance from the cover member 100 as a moving part for OIS (Optical Image Stabilization) driving. However, in the AF model, the housing 310 can be fixed on the base 500. In addition, in the AF model, the housing 310 may be omitted, and a magnet provided as the second movable part 320 may be fixed to the cover member 100. [

The upper and lower sides of the housing 310 are opened to accommodate the first mover 200 so as to be movable up and down. The housing 310 may include an inner space 311 which is vertically open on the inner side. The first mover 200 can be movably positioned in the inner space 311. That is, the inner space 311 may have a shape corresponding to that of the first mover 200. The outer circumferential surface of the inner space 311 may be spaced apart from the outer circumferential surface of the first mover 200.

The housing 310 may include a second movable part 312 coupled to the second movable part 320 to receive the second movable part 320. That is, the second movable part engaging part 312 can receive and fix the second movable part 320. The second movable portion 320 can be fixed to the second movable portion engagement portion 312 by an adhesive (not shown). Meanwhile, the second movable part coupling part 312 may be located on the inner peripheral surface of the housing 310. In this case, there is an advantage in favor of the electromagnetic interaction with the first movable part 220 located inside the second movable part 320. [ Further, the second movable part engaging part 312 may be in the form of, for example, an open bottom part. In this case, there is an advantage in favor of the electromagnetic interaction between the third movable part 420 and the second movable part 320 located below the second movable part 320. The second movable part engaging part 312 may be provided as four, for example. The second movable part 320 may be coupled to each of the four second movable part coupling parts 312.

An upper support member 610 may be coupled to the upper portion of the housing 310 and a lower support member 620 may be coupled to the lower portion of the housing 310. The housing 310 may include an upper engagement portion 313 coupled with the upper support member 610. The upper engagement portion 313 can be engaged with the outer side portion 611 of the upper support member 610. As an example, the upper coupling portion 313 provided as a projection can be inserted into the groove of the outer side portion 611 and coupled thereto. Meanwhile, protrusions may be provided on the upper support member 610, and grooves may be formed on the housing 310 so that both are coupled. Meanwhile, the housing 310 may include a lower coupling portion (not shown) coupled with the lower supporting member 620. The lower coupling portion formed at the lower portion of the housing 310 can be engaged with the outer portion 621 of the lower supporting member 620. [ As an example, the lower coupling portion provided as a projection can be inserted into the groove of the outer side portion 621 and coupled thereto.

The second movable portion 320 may be positioned opposite to the first movable portion 220 of the first movable element 200. [ The second movable part 320 can move the first movable part 220 through the electromagnetic interaction with the first movable part 220. The second movable portion 320 may include a magnet. The magnet may be fixed to the second movable part engaging part 312 of the housing 310. The second movable part 320 may be disposed in the housing 310 such that four magnets are independently provided as shown in FIG. 2, for example, so that two adjoining magnets are 90 ° apart from each other. That is, the second movable part 320 is equally spaced from the four side surfaces of the housing 310, so that the inner volume can be efficiently used. The second movable part 320 may be adhered to the housing 310 with an adhesive or the like, but is not limited thereto. Meanwhile, the first movable part 220 may include a magnet, and the second movable part 320 may include a coil.

The stator 400 may be positioned so as to face the lower side of the second mover 300. On the other hand, the stator 400 can move the second mover 300. In addition, the through holes 411 and 421 corresponding to the lens module may be located at the center of the stator 400. [

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

The circuit board 410 may include a flexible printed circuit board (FPCB) that is a flexible printed circuit board. The circuit board 410 may be positioned between the third movable portion 420 and the base 500. On the other hand, the circuit board 410 can supply power to the third movable unit 420. In addition, the circuit board 410 can supply power to the first sensor unit 710 through the side support member 630 and the upper side support member 610. The circuit board 410 can supply power to the first movable unit 220 through the side support member 630, the upper support member 610, the connecting member 640, and the lower support member 620. The circuit board 410 may have a through hole 411 through which light passing through the lens module is passed. In addition, the circuit board 410 may include a terminal portion 412 that is bent and exposed to the outside. The terminal portion 412 may be connected to an external power source, and power may be supplied to the circuit board 410 through the terminal portion 412.

The third movable portion 420 may include a coil. When power is applied to the coil of the third movable part 420, the housing 310, to which the second movable part 320 and the second movable part 320 are fixed, flows integrally due to interaction with the second movable part 320 . The third movable part 420 may be mounted on or electrically connected to the circuit board 410. Meanwhile, the third movable part 420 may include a through hole 421 through which the light of the lens module is passed. Considering the downsizing of the lens driving unit 10 (the height in the z-axis direction in the optical axis direction), the third movable part 420 is formed of an FP coil, which is a patterned coil, (Not shown).

The base 500 can support the second mover 300. A printed circuit board may be positioned below the base 500. The base 500 may include a hollow hole 510 formed at a position corresponding to the lens coupling portion 211 of the bobbin 210. The base 500 may perform a sensor holder function to protect the image sensor. On the other hand, the base 500 may be provided with an infrared ray filter. An infrared ray filter may be coupled to the hollow hole 510 of the base 500.

The base 500 may include a foreign matter collecting unit 520 for collecting foreign matter introduced into the cover member 100 as an example. The foreign matter collecting unit 520 is disposed on the upper surface of the base 500 and can collect foreign substances on the inner space formed by the cover member 100 and the base 500 including the adhesive material. The base 500 may include a sensor mount 530 to which the second sensor 720 is coupled. That is, the second sensor 720 can be mounted on the sensor mounting portion 530. At this time, the second sensor 720 senses the horizontal movement of the housing 310 by sensing the second movable part 320 coupled to the housing 310. Two sensor mounting portions 530 may be provided as an example. The second sensor 720 may be located in each of the two sensor mounts 530. In this case, the second sensor 720 can be arranged to sense both the movement of the housing 310 in the x-axis direction and the y-axis direction.

The support member 600 can connect any two or more of the first mover 200, the second mover 300, and the base 500. The support member 600 may elastically connect any two or more of the first mover 200, the second mover 300 and the base 500 to allow relative flow between the respective components have. That is, the support member 600 may be provided as an elastic member. The support member 600 may include an upper support member 610, a lower support member 620, a side support member 630 and an energizing member 640 as shown in Fig. However, the energizing member 640 may be provided solely for energizing the upper side support member 610 and the lower side support member 620.

The upper support member 610 may include an outer portion 611, a medial portion 612, and a connection portion 613 as an example. The upper support member 610 includes an outer portion 611 coupled with the housing 310, a medial portion 612 coupled with the bobbin 210, and a connection portion 612 elastically connecting the outer portion 611 and the medial portion 612 613).

The upper support member 610 may be connected to the upper portion of the first mover 200 and the upper portion of the second mover 300. More specifically, the upper support member 610 may be coupled to the upper portion of the bobbin 210 and the upper portion of the housing 310. The upper support member 610 may include an outer portion 611 and a medial portion 612. The inner side portion 612 of the upper side support member 610 is engaged with the upper side coupling portion 213 of the bobbin 210 and the outer side portion 611 of the upper side support member 610 is coupled to the upper side coupling portion 313 of the housing 310, ≪ / RTI >

The upper support member 610 may be divided into six as one embodiment. At this time, two of the six upper support members 610 may be used to apply power to the first movable unit 220 by being energized with the lower support member 620. Each of the two upper side support members 610 may be electrically connected to each of the pair of lower side support members 620a and 620b through a conductive member 640. [ On the other hand, the remaining four of the six upper support members 610 can be used to supply power to the first sensor unit 710 and transmit / receive information or signals between the control unit and the first sensor unit 710 .

The lower support member 620 may include a pair of lower support members 620a and 620b as an example. That is, the lower support member 620 may include a first lower support member 620a and a second lower support member 620b. Each of the first lower support member 620a and the second lower support member 620b may be connected to each of a pair of outgoing lines of the first movable unit 220 provided as a coil to supply power. On the other hand, the pair of lower side support members 620 can be electrically connected to the circuit board. With such a structure, the pair of the lower support members 620 can supply the power supplied from the circuit board to the first movable unit 220.

The lower support member 620 may include an outer portion 621, a medial portion 622, and a connection portion 623 as an example. The lower support member 620 includes an outer side portion 621 coupled with the housing 310, an inner side portion 622 coupled with the bobbin 210, and a connecting portion 622 elastically connecting the outer side portion 621 and the inner side portion 622 623).

The lower support member 620 may be connected to a lower portion of the first mover 200 and a lower portion of the second mover 300. More specifically, the lower support member 620 may be coupled to the lower portion of the bobbin 210 and the lower portion of the housing 310. The lower support member 620 may include an outer portion 621 and a medial portion 622. The lower coupling portion of the bobbin 210 may be coupled to the inner side portion 622 of the lower support member 620 and the lower coupling portion of the housing 310 may be coupled to the outer side portion 621 of the lower side support member 620.

One end of the side support member 630 may be fixed to the stator 400 or the base 500 and the other end may be coupled to the upper support member 610 or the second mover 300. One side of the side support member 630 may be coupled to the base 500 and the other side may be coupled to the second mover 300 as an example. The side support member 630 elastically supports the second mover 300 so that the second mover 300 can be moved in a horizontal direction or tilted.

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

The side support member 630 may be coupled to the upper support member 610 as an example and may include a configuration for shock absorption. The shock absorbing structure may be provided on at least one of the side support member 630 and the upper side support member 610. [ The configuration for shock absorption may be a separate member such as a damper. Further, the configuration for absorbing the shock may be realized by changing the shape of any one of the side support member 630 and the upper side support member 610.

The energizing member 640 can electrically connect the upper side support member 610 and the lower side support member 620. The energizing member 640 may be separately provided from the side support member 630. [ A power source supplied to the upper side support member 610 through the energizing member 640 is supplied to the lower side support member 620 and power can be supplied to the first movable side 220 through the lower side support member 620. [

The sensor unit 700 can be used for at least one of autofocus feedback control and camera shake correction feedback control. That is, the sensor unit 700 can detect the position or movement of any one of the first mover 200 and the second mover 300. The sensor unit 700 may include a first sensor unit 710 and a second sensor 720 as an embodiment. The first sensor unit 710 senses the relative upward and downward movement of the bobbin 210 relative to the housing 310 to provide information for AF feedback. The second sensor 720 senses the horizontal movement or tilt of the second mover 300 and can provide information for OIS feedback.

The first sensor unit 710 may be located in the first mover 200. More specifically, the first sensor unit 710 may be located on the bobbin 210. [ The first sensor unit 710 may be inserted into and fixed to the sensor mounting groove 800 formed on the outer circumferential surface of the bobbin 210. The first sensor unit 710 may include a first sensor 711, a sensor mounting portion 712, and a terminal portion 713 as an embodiment.

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

The first sensor 711 may be fixed to the sensor mounting portion 712. The sensor mounting portion 712 may be provided in a strip shape as shown in FIG. 2 as an embodiment. At least a part of the sensor mounting portion 712 may have a shape corresponding to the sensor mounting groove 800 of the bobbin 210 and may be inserted into the sensor mounting groove 800. The sensor mounting portion 712 may be an FPCB as an embodiment. That is, the sensor mounting portion 712 may be flexible and may be bent to correspond to the shape of the sensor mounting groove 800. The sensor mounting portion 712 may have a terminal portion 713 formed thereon.

The terminal portion 713 is supplied with power and can supply power to the first sensor 711 through the sensor mounting portion 712. Also, the terminal portion 713 may receive a control command for the first sensor 711 or may transmit a sensed value from the first sensor 711. [ Four terminal portions 713 are provided as one embodiment and may be electrically connected to the upper side support member 610. In this case, the two terminal portions 713 are used for receiving power from the upper support member 610, and the remaining two terminal portions 713 can be used for transmitting and receiving information or signals.

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

The lens driving unit 10 according to an embodiment of the present invention includes a first movable unit 220, a bobbin 210 that moves integrally with the first movable unit 220, and a second movable unit 220 that faces the first movable unit 220 A second movable part 320 which moves the first movable part 220 through interaction with the first movable part 220 and a second sensor 320 which senses the movement of the bobbin 210 relative to the second movable part 320, A flexible sensor mounting portion 712 to which the first sensor 711 is coupled and a sensor mounting groove 800 formed on the bobbin 210 and to which the sensor mounting portion 712 is mounted. Meanwhile, the lens driving unit 10 according to an embodiment of the present invention may further include a guide portion such that the sensor mounting portion 712 maintains a shape corresponding to the shape of at least a part of the sensor mounting groove 800.

The guide portion may include a groove portion 811 which is located in the sensor mounting groove 800 and to which the sensor mounting portion 712 is coupled. As an example, the width W1 of the groove 811 may be smaller than the width W2 of the sensor mounting portion 712, as shown in Fig. In other words, the width W1 of at least a part of the sensor mounting groove 800 may be smaller than the width W2 of the sensor mounting portion 712. [ That is, the sensor mounting portion 712 can be interference fit with at least a part of the sensor mounting groove 800. At this time, the width W1 of the groove portion 811 may be smaller than the width W2 of the sensor mounting portion 712 by 0 mm to 0.05 mm.

The inner side portion 612 of the upper support member 610 includes a groove, and the bobbin 210 may include a protrusion inserted into the groove. That is, the upper coupling portion 213 may include projections. At this time, the end surface of the inner side portion 612 can be interfaced with the terminal portion 713 formed on the sensor mounting portion 712. On the other hand, the terminal end of the inner side portion 612 and the terminal portion 713 can be coupled by soldering.

The sensor mounting portion 712 may include a flexible circuit board on which the first sensor 710 is mounted. Four terminal portions 713 for supplying power to the first sensor 710 and transmitting and receiving signals may be located on the flexible circuit board. Two of the terminal portions 713 are used for supplying power to the first sensor 710 and the remaining two terminal portions 713 can be used for signal communication between the first sensor 710 and the control portion.

The upper support member 610 may be divided into six pieces so as to be connected to the four terminal portions 713 of the first sensor unit 710 and the pair of lower support members 620a and 620b. At this time, the side support members 610 may be connected to each of the upper support members 610 separated and provided by being divided into six or more. With this structure, the power supplied from the outside to the side support member 610 can be supplied to the first sensor 710. Also, the first sensor 710 and the control unit can transmit and receive signals.

Hereinafter, the configuration of a camera module according to another embodiment of the present invention will be described with reference to the drawings.

5 is a conceptual diagram showing a sensor mounting portion of a lens driving unit according to another embodiment of the present invention.

The lens driving unit 10 according to another embodiment of the present invention includes a cover member 100, a first mover 200, a second mover 300, a stator 400, a base 500, 600, a sensing unit 700, and a sensor mounting groove 800. However, the lens driving unit 10 according to another embodiment of the present invention corresponds to the lens driving unit 10 according to an embodiment of the present invention except for the sensor mounting portion 712, so that the above description can be applied analogously .

The sensor mounting portion 712 of the lens driving unit 10 according to another embodiment of the present invention includes a first fitting portion 714 positioned at one end of the sensor mounting portion 712 as a guide portion, And a second coupling hole 715 at the other end and coupled with the first coupling hole 714. That is, one end and the other end of the sensor mounting portion 712 can be coupled. On the other hand, the sensor mounting portion 712 may have a band shape. At this time, the sensor mounting portion 712 includes a first fitting portion 714 located at one end in the longitudinal direction of the sensor mounting portion 712 and a second fitting portion 714 located at the other end of the sensor mounting portion 712, And a second engaging hole 715 having a shape corresponding to that of the first engaging portion 715. [ The sensor mounting portion 712 may have a length L, a height H, and a width W as shown in FIG. At this time, the width W of the sensor mounting portion 712 may be larger than the width W1 of the groove portion 811 shown in Fig. The height H of the sensor mounting portion 712 can correspond to the depth of the sensor mounting groove 800. [ The length L of the sensor mounting portion 712 may be smaller than the circumferential length of the sensor mounting groove 800. Accordingly, the sensor mounting portion 712 can be inserted into the sensor mounting groove 800 in a state where both ends of the sensor mounting portion 712 are engaged.

The first coupling hole 714 may include a first coupling protrusion 717 located at one side outer end of the sensor mounting portion 712 and a first coupling groove 716 located inside the one outer side end . The second coupling hole 715 includes a second coupling protrusion 719 located at the other end of the sensor mounting portion 712 and a second coupling groove 718 located inside the other end of the sensor mounting portion 712 . The first engaging protrusion 717 and the second engaging protrusion 719 may protrude from a virtual center line C of the sensor mounting portion 712 in the longitudinal direction. The first engaging groove 716 and the second engaging groove 718 may be recessed from a virtual center line C of the sensor mounting portion 712 in the longitudinal direction. Through such a structure, the first coupling hole 714 and the second coupling hole 715 can be coupled. On the other hand, the sensor mounting portion 712 thus combined may have a circular cross section as shown in Fig. 5 (b).

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

6 is a plan view showing a part of the structure of the lens driving unit according to the embodiment of the present invention.

First, an autofocus function of a camera module according to an embodiment of the present invention will be described. When power is supplied to the first mover 220, the first mover 220 and the second mover 320, which are provided as a magnet, are moved by the electromagnetic interaction between the first mover 220 and the second mover, (320). ≪ / RTI > At this time, the bobbin 210 to which the first mover 220 is coupled moves integrally with the first mover 220. That is, the bobbin 210 coupled to the inner side of the lens module moves up and down with respect to the housing 310. Such movement of the bobbin 210 results in moving the lens module closer to the image sensor or moving away from the image sensor, so focus adjustment to the subject is performed.

On the other hand, autofocus feedback can be applied for more precise realization of the autofocus function of the camera module according to an embodiment of the present invention. The first sensor 711 mounted on the bobbin 210 and provided as a hall sensor senses the magnetic field of the second movable part 320 provided as a magnet fixed to the housing 310. Meanwhile, when the bobbin 210 moves relative to the housing 310, the amount of the magnetic field sensed by the first sensor 711 changes. The first sensor 711 senses the movement amount or position of the bobbin 210 in the z-axis direction in this manner and transmits the detection value to the control unit. The control unit determines whether to perform an additional movement with respect to the bobbin 210 through the received sensing value. Since such a process is generated in real time, the autofocus function of the camera module according to an embodiment of the present invention can be performed more precisely through autofocus feedback.

The camera shake correction function of the camera module according to an embodiment of the present invention will be described. When power is supplied to the third mover 420, the second mover 320 is moved by the electromagnetic interaction of the third mover 420 and the second mover 320 provided as a magnet, (420). ≪ / RTI > At this time, the housing 310 to which the second mover 320 is coupled moves integrally with the second mover 320. That is, the housing 310 is moved in the horizontal direction with respect to the base 500. At this time, the tilting of the housing 310 with respect to the base 500 may be induced. This movement of the housing 310 is a result of the lens module moving in a direction parallel to the direction in which the image sensor is placed with respect to the image sensor, so that the camera shake correction function is performed.

Meanwhile, camera shake correction feedback may be applied for more precise realization of the camera shake correction function of the camera module according to an embodiment of the present invention. A pair of second sensors 720 mounted on the base 500 and equipped with hall sensors sense the magnetic field of the second movable part 320 provided as a magnet fixed to the housing 310. On the other hand, when the housing 310 performs relative movement with respect to the base 500, the amount of the magnetic field sensed by the second sensor 720 changes. The pair of second sensors 720 senses the movement amount or the position of the housing 310 in the horizontal direction (x-axis, y-axis direction) in this way and transmits the detection value to the control unit. The control unit determines whether to perform the additional movement to the housing 310 through the received sensing value. Since the above process is performed in real time, the camera shake correction function of the camera module according to one embodiment of the present invention can be performed more precisely through the camera shake correction feedback.

In the camera module according to the embodiment of the present invention, the sensor mounting portion 712 can be held in a shape corresponding to the shape of at least a part of the sensor mounting groove 800 through the guide portion. If there is no guide portion, the terminal portion 713 pushes the inner side portion 612 of the upper side support member 610 as shown by A in FIG. In this case, a force to rotate is applied to the upper support member 610 with reference to the protrusion of the upper coupling portion 213 of the bobbin 210 connected to the inner side portion 612. Such a force generates a dynamic tilt or a static tilt with respect to the bobbin 210. However, in the camera module according to another embodiment of the present invention, such a phenomenon is prevented by the guide portion. That is, in the camera module according to the embodiment of the present invention, since the occurrence of tilting is suppressed, more accurate autofocus function and camera shake correction function can be provided.

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 200: first movable member
300: second movable element 400: stator
500: base 600: support member
700: Sensor part 800: Sensor mounting groove

Claims (20)

A first movable part;
A bobbin moving integrally with the first movable part;
A second movable part positioned to face the first movable part and moving the first movable part through interaction with the first movable part;
A sensor for sensing movement of the bobbin relative to the second movable part;
A flexible sensor mount to which the sensor is coupled;
A sensor mounting groove formed on the bobbin and having the sensor mounting portion; And
Wherein the sensor mounting portion includes a guide portion configured to maintain a shape corresponding to a shape of at least a part of the sensor mounting groove.
The method according to claim 1,
Wherein the guide portion includes a groove portion that is located in the sensor mounting groove and to which the sensor mounting portion is coupled,
And the width of the groove portion is smaller than the width of the sensor mounting portion.
The method according to claim 1,
Wherein the guide portion includes a first engaging portion located at one end of the sensor mounting portion and a second engaging portion located at the other end of the sensor mounting portion and engaged with the first engaging portion.
A first movable part;
A bobbin moving integrally with the first movable part;
A second movable part positioned to face the first movable part and moving the first movable part through interaction with the first movable part;
A sensor for sensing movement of the bobbin relative to the second movable part;
A flexible sensor mount to which the sensor is coupled; And
And a sensor mounting groove formed on the bobbin and on which the sensor mount is located,
Wherein a width of the sensor mounting groove is smaller than a width of the sensor mounting portion at least in part.
5. The method of claim 4,
Wherein the sensor mounting portion is press-fit-engaged with at least a part of the sensor mounting groove.
5. The method of claim 4,
A housing in which the second movable part is located; And
And a support member elastically connecting the bobbin and the housing,
Wherein the sensor mounting portion is provided with a terminal portion electrically connected to the support member.
The method according to claim 6,
Wherein the supporting member includes an outer portion coupled with the housing, an inner portion coupled with the bobbin, and a coupling portion coupled with the outer portion and the inner portion.
8. The method of claim 7,
Wherein the inner side includes a groove, and the bobbin includes a projection inserted into the groove.
5. The method of claim 4,
Wherein the sensor mounting portion includes a flexible circuit board on which the sensor is mounted,
Wherein the flexible circuit board is provided with four terminal portions for supplying power to the sensor and for transmitting and receiving signals.
10. The method of claim 9,
A housing in which the second movable part is located; And
And a lower support member elastically connecting the lower portion of the bobbin and the lower portion of the housing,
And the lower support member is provided to be separated into a pair so as to supply power to the first movable unit.
11. The method of claim 10,
And an upper support member elastically connecting the upper portion of the bobbin and the upper portion of the housing,
Wherein the upper support member is divided into six to be connected to the four terminal portions and the pair of lower support members, respectively.
12. The method of claim 11,
A base positioned below the housing; And
And a side support member elastically connecting the base and the housing,
And the side support member is electrically connected to the upper support member.
5. The method of claim 4,
The second movable portion includes a magnet,
Wherein the sensor includes a hall sensor for sensing a magnetic force of the magnet.
A first movable part;
A bobbin moving integrally with the first movable part;
A second movable part positioned to face the first movable part and moving the first movable part through interaction with the first movable part;
A sensor for sensing movement of the bobbin relative to the second movable part; And
Wherein the sensor is coupled and includes a flexible sensor mount positioned on the bobbin,
And one end of the sensor mounting portion is engaged with the other end of the sensor mounting portion.
15. The method of claim 14,
The sensor mounting portion has a strip shape,
A first coupling part located at one end in the longitudinal direction of the strip-shaped sensor mounting part; And
And a second engaging portion located at the other end of the sensor mounting portion and having a shape corresponding to the first engaging portion.
16. The method of claim 15,
The first coupling hole may include a first coupling protrusion located at one outer end of the sensor mounting portion and a first coupling groove located inside the one outer end,
The second coupling hole may include a second coupling protrusion that is located at the other end of the sensor mounting portion and is inserted into the first coupling groove and a second coupling protrusion located inside the other end of the second coupling groove and receiving the first coupling protrusion, And a lens driving unit.
15. The method of claim 14,
Wherein the sensor mounting portion has a circular cross section in a state where one end and the other end are engaged with each other.
A lens module;
A first movable part;
A bobbin to which the first movable part is coupled to an outer circumferential surface and the lens module is coupled to an inner circumferential surface;
A second movable part positioned to face the first movable part and moving the first movable part through interaction with the first movable part;
A sensor for sensing movement of the bobbin relative to the second movable part;
A flexible sensor mounting portion on which the sensor is mounted, the flexible sensor mounting portion being located on the bobbin; And
And a sensor mounting groove formed on the bobbin and on which the sensor mount is located,
Wherein the sensor mounting portion includes a guide portion configured to maintain a shape corresponding to a shape of at least a part of the sensor mounting groove.
19. The method of claim 18,
At least one of the first movable part and the second movable part includes a coil,
And a control unit for applying power to the coil,
Wherein the control unit controls power applied to the coil through a sensing value sensed by the sensor.
A display unit disposed on one side of the main body to display information; and a camera module mounted on the main body and configured to photograph an image or a photograph,
The camera module includes:
A bobbin to which the first movable part is coupled to the outer circumferential surface and the lens module is coupled to the inner circumferential surface;
A second movable part positioned to face the first movable part and moving the first movable part through interaction with the first movable part;
A sensor for sensing movement of the bobbin relative to the second movable part;
A flexible sensor mounting portion on which the sensor is mounted, the flexible sensor mounting portion being located on the bobbin; And
And a sensor mounting groove formed on the bobbin and on which the sensor mount is located,
Wherein the sensor mounting portion includes a guide portion configured to maintain a shape corresponding to a shape of at least a part of the sensor mounting groove.

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