KR20220130660A - Lens driving device, camera module and optical apparatus - Google Patents

Abstract

A lens driving device of the present invention comprises: a bobbin which is movably positioned inside a housing; a supporting member which elastically connects the bobbin and the housing; and a sensor which senses the relative position of the bobbin and the housing. The supporting member includes: a first supporting member and a second supporting member positioned in a Y-axis direction and facing each other; and a third supporting member and a fourth supporting member positioned in an X-axis direction and facing each other. The sensor is positioned closest to the first supporting member among first to fourth supporting members, and the elastic modulus of the first supporting member and the second supporting member is smaller than that of the third supporting member and the fourth supporting member. The present invention can minimize oscillation which may happen during an auto-focus feedback control.

Description

Lens driving device, camera module and optical apparatus

An embodiment of the present invention relates to a lens driving device, a camera module, and an optical device.

As various types of portable terminals are widely distributed and wireless Internet services are commercialized, the needs of consumers related to portable terminals are also diversifying, so that various types of additional devices are being installed in portable terminals.

Among them, there is a camera module as a representative example that can take a photo or video of a subject, store the image data, and then edit and transmit it as needed.

Meanwhile, in recent years, a camera module having an auto focus function has been used, and auto focus feedback needs to be used for more precise auto focus control.

However, when autofocus feedback is applied to the conventional camera module, when an external force corresponding to the natural vibration frequency of the elastic member of the lens driving device is applied, a phenomenon in which the elastic member oscillates occurs, which is a problem.

In order to solve the above problem, an object of the present invention is to provide a lens driving device that minimizes oscillation that may occur during autofocus feedback control by changing the shape of the support member.

Another object of the present invention is to provide a camera module and an optical device including the lens driving device.

In order to solve the above problems, the lens driving device according to an embodiment of the present invention, a bobbin movably located inside the housing; a support member elastically connecting the bobbin and the housing; and a sensor sensing the relative positions of the bobbin and the housing, wherein the support member includes: a first support member and a second support member positioned in a y-axis direction and facing each other; and a third support member and a fourth support member positioned in the x-axis direction and facing each other, wherein the sensor is positioned closest to the first support member among the first to fourth support members, and the first support member The elastic modulus of the member and the second supporting member may be less than that of the third supporting member and the fourth supporting member.

An x-axis modulus of elasticity of the first support member and the second support member may be less than a y-axis modulus of elasticity of the third support member and the fourth support member.

The support member may include an upper support member connecting an upper portion of the housing and an upper portion of the bobbin; and a lower support member connecting a lower portion of the housing and a lower portion of the bobbin, wherein a support member positioned adjacent to the sensor among the upper support member and the lower support member includes the first to fourth support members may include

The first support member may include: a first support part positioned closer to the y-axis direction than to the x-axis direction; and a second support part positioned closer to the x-axis direction than the y-axis direction, wherein an elastic modulus of the first support part may be less than an elastic modulus of the second support part.

The second support member may include: a first support part positioned closer to the y-axis direction than to the x-axis direction; and a second support part positioned closer to the x-axis direction than the y-axis direction, wherein an elastic modulus of the first support part may be less than an elastic modulus of the second support part.

The thickness of the first support member and the second support member may be thinner than the thickness of the third support member and the fourth support member.

The width of the first support member and the second support member may be smaller than the width of the third support member and the fourth support member.

The lengths of the first support member and the second support member may be shorter than the lengths of the third support member and the fourth support member.

FPCB (Flexible Printed Circuit Board) receiving power from the outside; and a side support member supporting the housing with respect to the base and energizing the FPCB and the upper support member, wherein the sensor may receive power from the upper support member.

It further includes a connection member for energizing the upper support member and the lower support member, and the coil positioned on the outer circumferential surface of the bobbin may receive power from the lower support member.

The upper support member may include first to sixth upper support members, the first to fourth upper support members may be connected to the sensor, and the fifth to sixth upper support members may be connected to the lower support member. have.

* A camera module according to an embodiment of the present invention includes: a bobbin movably located inside the housing; a support member elastically connecting the bobbin and the housing; a sensor for sensing a relative position between the bobbin and the housing; and a control unit that applies a movement signal to the bobbin and is connected to the sensor to control feedback of movement of the bobbin, wherein the support member includes a first support member positioned in a first direction and facing the first support member; a second support member; and a third support member and a fourth support member positioned in a second direction perpendicular to the first direction and facing each other, wherein the sensor includes the first support member among the first to fourth support members. It is positioned closest to the member, and the elastic modulus in the second direction of the support member may be less than the elastic modulus in the first direction of the support member.

The support member may include an upper support member connecting an upper portion of the housing and an upper portion of the bobbin; and a lower support member connecting the lower portion of the housing and the lower portion of the bobbin, wherein one support member positioned adjacent to the sensor among the upper support member and the lower support member is more elastic than the other support member The coefficient can be large.

The first support member may include: a first support part disposed in the first direction; and a second support part disposed in the second direction, wherein a width of the first support part may be smaller than a width of the second support part.

An optical device according to an embodiment of the present invention includes a main body, a display unit disposed on one surface of the main body to display information, and a camera module installed in the main body to take images or photos, the camera module Silver, a bobbin movably located inside the housing; a support member elastically connecting the bobbin and the housing; and a sensor sensing a relative position between the bobbin and the housing, wherein the support member includes first and second support members positioned in a first direction and facing each other, and a second second orthogonal to the first direction. a third support member and a fourth support member positioned to face each other, wherein the sensor is positioned closest to the first support member among the first to fourth support members, and the support member includes: The elastic force with respect to the tilt in two directions may be less than the elastic force with respect to the tilt in the first direction.

Through the present invention, it is possible to minimize an oscillation phenomenon that may occur during autofocus feedback control.

1 is a perspective view of a lens driving device according to an embodiment of the present invention.
2 is an exploded perspective view of a lens driving device according to an embodiment of the present invention.
3 is a plan view illustrating some components of a lens driving device according to an embodiment of the present invention.
4 is a plan view of an upper support member of the lens driving device according to an embodiment of the present invention.
5 is a plan view of an upper support member of a lens driving device according to another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but between each component another component It will be understood that may also be "connected", "coupled" or "connected".

"PCB" used below is an abbreviation of Printed Circuit Board and means a printed circuit board. In addition, "FPCB" used below is an abbreviation of Flexible Printed Circuit Board and means a flexible printed circuit board.

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

An optical device according to an embodiment of the present invention is 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), a PMP (Personal Digital Assistant) Portable Multimedia Player), navigation, etc., but is not limited thereto, and any device for taking an image or photo is possible.

An optical device according to an embodiment of the present invention includes a main body (not shown), a display unit (not shown) disposed on one surface of the main body to display information, and a camera installed in the main body to take images or photos It may include a camera (not shown) having a module.

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

The camera module may further include a lens driving device 10 , a printed circuit board (not shown), and an image sensor (not shown).

The lens driving device 10 may be coupled to the upper side of the printed circuit board. Meanwhile, the image sensor may be mounted on the printed circuit board. That is, the printed circuit board may form the bottom surface of the camera module.

In addition, the camera module may further include an infrared cut filter (not shown). The infrared cut filter may block light in the infrared region from being incident on the image sensor. The infrared cut filter may be installed on the 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 in the center of the base 500 . In an embodiment, the infrared filter may be formed of a film material or a glass material. Meanwhile, the infrared filter may have a form in which an infrared blocking coating material or the like is disposed on a flat optical filter such as a cover glass for protecting an imaging surface or a cover glass.

In addition, the camera module may further include a lens module coupled to the lens driving device 10 . Through this structure, the light passing through the lens module mounted on the lens driving device 10 may be irradiated to the image sensor. The lens module may include one or more lenses (not shown) and a lens barrel accommodating the one or more lenses. However, one configuration of the lens module is not limited to the lens barrel, and any holder structure capable of supporting one or more lenses may be used.

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

1 is a perspective view of a lens driving apparatus according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a lens driving apparatus according to an embodiment of the present invention.

Referring to FIG. 1 , a lens driving device 10 according to an embodiment of the present invention includes a cover can 100 , a first mover 200 , a second mover 300 , a stator 400 , and a base ( 500 ), a support member 600 , and a sensor unit 700 . However, in the lens driving device 10 according to an embodiment of the present invention, the cover can 100 , the first mover 200 , the second mover 300 , the stator 400 , the base 500 and the support Any one or more of the members 600 may be omitted.

The cover can 100 may form the exterior of the lens driving device 10 . The cover can 100 may have a hexahedral shape with an open bottom as an embodiment, but is not limited thereto. Meanwhile, the cover can 100 may be mounted on 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 formed by the cover can 100 and the base 500 . Also, the cover can 100 may be mounted on the base 500 in close contact with some or all of the side surfaces of the base 500 to be described later. Through such a structure, the cover can 100 has a function of preventing the penetration of external contaminants while protecting the internal components from external impact.

The cover can 100 may be formed of a metal material as an embodiment. In this case, the cover can 100 may protect the components of the lens driving device 10 from external interference caused by a mobile phone or the like. However, the material of the cover can 100 is not limited thereto.

The cover can 100 may include an opening 110 formed on the upper surface to expose the lens module (not shown). That is, the light introduced through the opening 110 may be transmitted to the image sensor (not shown) through the lens module.

The first movable member 200 may include a bobbin 210 and a first movable part 220 . The bobbin 210 of the first mover 200 may be combined 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 circumferential surface of the lens module may be coupled to the inner circumferential surface of the first mover 200 . Meanwhile, the first mover 200 may flow integrally with the lens module through interaction with the second mover 300 or the stator 400 . That is, the first mover 200 may move the lens module.

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

The bobbin 210 may be coupled to the lens module. In more detail, the outer peripheral surface of the lens module may be coupled to the inner peripheral surface of the bobbin 210 . Meanwhile, the first movable part 220 may be coupled to the bobbin 210 . In addition, 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 move relative to the housing 310 .

The bobbin 210 may include a first guide part 211 for guiding the winding or mounting of the first movable part 220 . The first guide part 211 may be integrally formed with the outer surface of the bobbin 210 . In addition, the first guide part 211 may be formed continuously along the outer surface of the bobbin 210 or may be formed to be spaced apart from each other by a predetermined interval.

The bobbin 210 may include a second guide part 212 for guiding the mounting of the first sensor part 710 . The second guide part 212 may be integrally formed with the outer surface of the bobbin 210 . In addition, the second guide part 212 may be provided in the form of a seating groove so that the sensor fixing part 711 of the first sensor part 710 can be inserted.

The bobbin 210 may include a coupling protrusion 213 coupled to the upper support member 610 . The coupling protrusion 213 may be inserted into and coupled to the first coupling groove 617 of the upper support member 610 . On the other hand, the protrusion is provided on the upper support member 610 and the groove is provided on the bobbin 210, so that both may be coupled. The bobbin 210 is provided with a total of four coupling protrusions 213 as shown in FIG. 2 as an embodiment, and each of the coupling protrusions 213 may be coupled to each of the upper support members 610 separately provided. . Meanwhile, the bobbin 210 may include a coupling protrusion (not shown) coupled to the lower support member 620 . The coupling protrusion formed on the lower portion of the bobbin 210 may be inserted into and coupled to the first coupling groove 627 of the lower support member 620 .

The first movable part 220 may be positioned to face the second movable part 320 of the second movable member 300 . The first movable part 220 may move the bobbin 210 with respect to the housing 310 through electromagnetic interaction with the second movable part 320 . The first movable unit 220 may include a coil. The coil may be guided by the first guide part 211 and wound on the outer surface of the bobbin 210 . In addition, the coil may be disposed on the outer surface of the bobbin 210 such that four coils are independently provided such that two adjacent coils form 90° with each other. When the first movable unit 220 includes a coil, power supplied to the coil may be supplied through the lower support member 620 . Meanwhile, when power is supplied to the coil, an electromagnetic field may be formed around the coil. Also, the first movable unit 220 may include a magnet. In this case, the second mover 320 may be provided as a coil.

The second mover 300 may be positioned outside the first mover 200 to face the first mover 200 .

The second mover 300 may include a housing 310 positioned outside the bobbin 210 . Also, the second movable member 300 may include a second movable part 320 positioned to face 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 can 100 forming the exterior of the lens driving device 10 . In addition, the housing 310 may be formed of an insulating material, and may be formed as an injection molding product in consideration of productivity. The housing 310 is a moving part for optical image stabilization (OIS) driving and may be disposed to be spaced apart from the cover can 100 by a predetermined distance.

The housing 310 has upper and lower sides open to accommodate the first mover 200 to be movable in the vertical direction. Also, the housing 310 may include a movable part accommodating part 311 formed on a side surface in a shape corresponding to the second movable part 320 to accommodate the second movable part 320 . That is, the movable part accommodating part 311 may receive and fix the second movable part 320 . Meanwhile, the movable part accommodating part 311 may be located on the inner circumferential surface or the outer circumferential surface of the housing 310 .

The housing 310 may include a stopper 312 that is formed to protrude upward and absorbs an impact by contacting the lower side of the upper surface of the cover can 100 in the event of an external impact. The stoppers 312 may be formed in plurality. The stoppers 312 may be respectively provided at the vertices of the quadrilateral as shown in FIG. 2 as an embodiment, but is not limited thereto. Meanwhile, the stopper 312 may be integrally formed with the housing 310 .

An upper support member 610 may be coupled to an upper portion of the housing 310 , and a lower support member 620 may be coupled to a lower portion of the housing 310 . The housing 310 may include a coupling protrusion 323 coupled to the upper support member 610 . The coupling protrusion 323 may be inserted into and coupled to the second coupling groove 618 of the upper support member 610 . Meanwhile, a protrusion is provided on the upper support member 610 and a groove is provided on the housing 310 so that both may be coupled. The housing 310 may be provided with a plurality of coupling protrusions 313 as shown in FIG. 2 as an embodiment. Meanwhile, the housing 310 may include a coupling protrusion (not shown) coupled to the lower support member 620 . The coupling protrusion formed on the lower portion of the housing 310 may be inserted into the second coupling groove 628 of the lower support member 620 to be coupled.

The second movable part 320 may be positioned to face the first movable part 220 of the first movable member 200 . The second movable part 320 may move the first movable part 220 through electromagnetic interaction with the first movable part 220 . The second movable unit 320 may include a magnet. The magnet may be fixed to the movable part receiving part 311 of the housing 310 . The magnet may be arranged in the housing 310 such that, as shown in FIG. 2 , as an embodiment, four magnets are independently provided so that two adjacent magnets form a 90° angle with each other. That is, the second movable part 320 is mounted at equal intervals on the four corners inside the housing 310 to promote efficient use of the internal volume. In addition, the second movable part 320 may be adhered to the housing 310 by an adhesive or the like, but is not limited thereto. Meanwhile, the first movable part 220 may include a magnet and the second movable part 320 may be provided as a coil.

The stator 400 may be positioned opposite to the lower side of the second mover 300 . Meanwhile, the stator 400 may move the second mover 300 . In addition, through holes 411 and 421 corresponding to the lens module may be positioned in the center of the stator 400 .

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

The third movable unit 410 may include a coil. In this case, when power is applied to the coil of the third movable part 410 , the housing 310 to which the second movable part 320 is fixed may flow by interaction with the second movable part 320 . The third movable unit 410 may be mounted on or electrically connected to the FPCB 420 . Meanwhile, the third movable unit 410 may have a through hole 411 in the center to pass the optical signal of the lens module. In addition, in consideration of the miniaturization of the lens driving device 10 (lowering the height in the z-axis direction, which is the optical axis direction), the third movable part 410 is formed of an FP coil, which is a patterned coil, so that the FPCB ( 420).

The FPCB 420 may be positioned between the third movable part 410 and the base 500 . Meanwhile, the FPCB 420 may supply power to the third movable unit 410 . In addition, the FPCB 420 may supply power to the first sensor unit 710 through the side support member 630 and the upper support member 610 . In addition, the FPCB 420 may supply power to the first movable unit 220 through the side support member 630 , the upper support member 610 , the connection member 640 , and the lower support member 620 .

The FPCB 420 may include a through hole 421 at a position corresponding to the through hole 411 of the second coil unit 410 . In addition, the FPCB 420 may include a terminal portion 422 that is bent and exposed to the outside. The terminal unit 422 may be connected to an external power source, through which power may be supplied to the FPCB 420 .

The base 500 may support the stator 400 . The base 500 may support the second mover 300 . A printed circuit board (not shown) may be positioned below the base 500 . The base 500 may include hollow holes 510 formed at positions corresponding to the through holes 411 and 421 of the stator 400 . The base 500 may perform a sensor holder function to protect an image sensor (not shown). On the other hand, the base 500 may be provided to position an infrared filter (Infrared Ray Filter) (not shown). That is, the infrared filter may be coupled to the hollow hole 510 of the base 500 .

The infrared filter may be mounted in a hollow hole 510 formed in the center of the base 500 . In an embodiment, the infrared filter may be formed of a film material or a glass material. Meanwhile, the infrared filter may have a form in which an infrared blocking coating material or the like is disposed on a flat optical filter such as a cover glass for protecting an imaging surface or a cover glass.

The base 500 may further include a foreign material collecting unit (not shown) for collecting foreign materials introduced into the cover can 100 as an embodiment. Meanwhile, the base 500 may further include a sensor seating groove (not shown) in which the second sensor unit 720 is seated.

The support member 600 may connect the first mover 200 and the second mover 300 . The support member 600 elastically connects the first mover 200 and the second mover 300 to allow the first mover 200 to move relative to the second mover 300 . can do. 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 a connection member 640 as shown in FIG. 2 as an embodiment.

The upper support member 610 may be connected to an upper portion of the first mover 200 and an upper portion of the second mover 300 . In more detail, 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 coupling protrusion 213 of the bobbin 210 is interpolated into the first coupling groove 617 of the upper support member 610, and the housing 310 is coupled to the second coupling groove 618 of the upper support member 610. The protrusion 313 may be interpolated.

The upper support member 610 may be provided in six pieces as an embodiment. That is, the upper support member 610 includes the first upper support member 611 , the second upper support member 612 , the third upper support member 613 , the fourth upper support member 614 , and the fifth upper support member It may include a member 615 and a sixth upper support member 616 . At this time, two of the six separation components of the upper support member 610 are used to apply power to the first movable unit 220 , and four are used to supply power to the first sensor unit 710 , and the control unit and the second unit. It may be used to input and output information between the first sensor units 710 .

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 . In more detail, the lower support member 620 may be coupled to the lower portion of the bobbin 210 and the lower portion of the housing 310 . A lower coupling protrusion (not shown) of the bobbin 210 is interpolated into the first coupling groove 627 of the lower support member 620, and the second coupling groove 628 of the lower support member 620 has a housing 310. A lateral support member 630 coupled to may be interpolated.

The lower support member 620 may be provided separately in two as an embodiment. At this time, the lower support member 620 separated into two may be electrically energized with two of the six separated components of the upper support member 610 through the connection member 640 . In this case, the lower support member 620 may be connected to the first movable unit 220 to supply power.

The side support member 630 may have one end fixed to the stator 400 or the base 500 and the other end coupled to the upper support member 610 or the second mover 300 . The lateral support member 630 elastically supports the second movable member 300 so that the second movable member 300 can move or tilt in a horizontal direction. The lateral support member 630 is coupled to the upper support member 610 as an example and may include a configuration for absorbing shock. The configuration for absorbing the shock may be provided on any one or more of the side support member 630 and the upper support member 610 . The configuration for absorbing the shock may be a separate member such as a damper. In addition, 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 support member 610 . The side support members 630 may be provided in the same number as the upper support members 610 as an embodiment. That is, the side support members 630 may be connected to each of the six upper support members 610 provided in total. In this case, the side support member 630 may supply power supplied from the stator 400 to each of the upper support members 610 . The number of the lateral support members 630 may be determined in consideration of symmetry as an embodiment. As an embodiment, as shown in FIG. 2 , a total of eight side support members 630 may be provided at each corner of the housing 310 .

The connecting member 640 may connect the upper support member 610 and the lower support member 620 to conduct electricity. The connection member 640 may be provided separately from the side support member 630 . Since power is also supplied to the lower support member 620 through the connection member 640 , power can be supplied to the first movable unit 220 through the lower support member 620 .

The sensor unit 700 may be used for auto focus (AF) feedback and/or optical image stabilization (OIS) feedback. That is, the sensor unit 700 may detect the position and/or movement of the first mover 200 and/or the second mover 300 . The sensor unit 700 may include a first sensor unit 710 and a second sensor unit 720 as an embodiment.

The first sensor unit 710 may be located on the first mover 200 . In more detail, the first sensor unit 710 may be located on the bobbin 210 . The first sensor unit 710 may be inserted into and fixed to the second guide unit 212 formed on the outer circumferential surface of the bobbin 210 . The first sensor unit 710 may include a sensor fixing unit 711 , a sensor 712 , and a terminal 713 as an embodiment. The sensor fixing unit 711 may be provided in a band shape as shown in FIG. 2 as an embodiment. At least a portion of the sensor fixing part 711 may be provided in a shape corresponding to the second guide part 212 of the bobbin 210 and be inserted into the second guide part 212 . The sensor fixing unit 711 may be an FPCB as an embodiment. That is, the sensor fixing part 711 may be provided to be flexible and positioned to surround the outer circumferential surface of the bobbin 210 . A sensor 712 may be fixed to the sensor fixing unit 711 . The sensor 712 may detect a movement or position of the bobbin 210 . The sensor 712 may be a Hall sensor as an example. The sensor 712 may sense a relative position between the bobbin 210 and the housing 310 by sensing a magnetic force generated from the second movable unit 320 . A terminal 713 may be formed in the sensor fixing part 711 . The terminal 713 may receive power and supply power to the sensor 712 through the sensor fixing unit 711 . Also, the terminal 713 may receive a control command for the sensor 712 or transmit a value sensed from the sensor 712 . As an embodiment, four terminals 713 may be provided. Meanwhile, the terminal 713 may conduct electricity with the upper support member 610 . In this case, the two terminals 713 may be used to receive power, and the remaining two terminals 713 may be used to transmit and receive information. The first sensor unit 710 may provide information for AF feedback by sensing the relative vertical flow of the bobbin 210 with respect to the housing 310 .

The second sensor unit 720 may be located on the stator 400 . The second sensor unit 720 may be located on an upper surface or a lower surface of the FPCB 420 of the stator 400 . The second sensor unit 720 may be located in a sensor seating groove (not shown) formed in the base 500 as an embodiment. The second sensor unit 720 may include a Hall sensor as an embodiment. In this case, the relative flow of the second mover 300 with respect to the stator 400 may be sensed by sensing the magnetic field of the second mover 320 of the second mover 300 . That is, the second sensor unit 720 may provide information for OIS feedback by detecting horizontal movement or tilt of the second mover 300 .

Meanwhile, hereinafter, the support member of the camera module according to an embodiment of the present invention will be described in more detail with reference to FIGS. 3 to 4 .

3 is a plan view illustrating some components of a lens driving device according to an embodiment of the present invention, and FIG. 4 is a plan view of an upper support member of the lens driving device according to an embodiment of the present invention. Although the upper support member is illustrated in FIG. 4 as an example, the following description may be analogously applied to the lower support member. Accordingly, a support member collectively referred to as an upper support member and a lower support member may be used for the description of FIG. 4 .

Referring to FIG. 3 , the upper support member 610 of the lens driving device 10 according to an embodiment of the present invention is coupled to the upper portion of the housing 310 and the upper portion of the bobbin 210 . The upper support member 610 elastically supports the housing 310 and the bobbin 210 to allow the bobbin 210 to move relative to the housing 310 . The upper support member 610 may include a first coupling groove 617 and a second coupling groove 618 . The first coupling groove 617 may be coupled to the coupling protrusion 213 of the bobbin 210 . The second coupling groove 618 may be coupled to the coupling protrusion 313 of the housing 320 .

Meanwhile, the upper support member 610 may include a damper application unit 619 . The damper application unit 619 may be provided in a shape corresponding to the damper guide 314 of the housing 310 . The damper applicator 619 may accommodate the damper guide 314 provided in a semi-circular shape as an embodiment, at least a portion of which protrudes in a cylindrical shape. A damper (not shown) may be applied between the damper application unit 619 and the damper guide 314 . The damper applied between the damper application unit 619 and the damper guide 314 may change the frequency characteristic of the upper support member 610 . That is, the damper may be applied to minimize the resonance phenomenon of the support member 600 . In addition, a damper (not shown) may be additionally applied in addition to between the upper support member 610 and the housing 310 . The damper may be applied between the housing 310 and the base 500 as an embodiment.

Referring to FIG. 4 , the upper support member 610 of the lens driving device 10 according to an embodiment of the present invention is positioned in a virtual y-axis direction and faces a first support member 611 and a second support member The member 612 may include a third support member 613 and a fourth support member 614 positioned in the virtual x-axis direction and facing each other. That is, the support member 610 includes the first support member 611 and the second support member 612 opposite to each other in the first direction, and a third opposing third direction and positioned in a second direction orthogonal to the first direction. It may include a support member 613 and a fourth support member 614 . Accordingly, the first support member 611 and the second support member 612 may be positioned to be perpendicular to the third support member 613 and the fourth support member 614 .

Meanwhile, the sensor 712 for sensing the relative positions of the bobbin 210 and the housing 310 may be located closest to the first support member 611 among the first to fourth support members 611 , 612 , 613 , and 164 . In this case, the elastic modulus of the first supporting member 611 and the second supporting member 612 may be smaller than the elastic modulus of the third supporting member 613 and the fourth supporting member 614 . In more detail, the thickness of the first support member 611 and the second support member 612 may be thinner than the thickness of the third support member 613 and the fourth support member 614 . In this case, the thickness means the length in the vertical direction. On the other hand, the width of the first support member 611 and the second support member 612 (see D2 in Fig. 4), the width of the third support member 613 and the fourth support member 614 (D1 in Fig. 4) see) may be thinner. In this case, the width means a length in the horizontal direction. In addition, the lengths of the first support member 611 and the second support member 612 may be shorter than the lengths of the third support member 613 and the fourth support member 614 . That is, the elastic modulus of the support member 600 provided as an elastic member may be adjusted through thickness, width, length, shape, and the like.

In addition, the y-axis modulus of elasticity of the first support member 611 and the second support member 612 may be smaller than the x-axis modulus of elasticity of the third support member 613 and the fourth support member 614 . Also, the elastic modulus in the second direction of the support member 610 may be described as being greater than the elastic modulus in the first direction. In this case, the amount of tilt in the y-axis direction (see A of FIG. 4 ) may be smaller than the amount of tilt in the x-axis direction (see B of FIG. 4 ). That is, the tilt amount A sensed through the sensor 712 may be reduced. As described above, when the tilt amount A sensed through the sensor 712 is reduced, the possibility of oscillation is also reduced. This will be described in detail below with reference to FIGS. 5 to 7 .

The support member 600 includes an upper support member 610 connecting the upper portion of the housing 310 and the upper portion of the bobbin 210 , and a lower support member connecting the lower portion of the housing 310 and the lower portion of the bobbin 210 . 620 may be included. In this case, the sensor 712 for sensing the relative positions of the bobbin 210 and the housing 310 may be located adjacent to either the upper support member 610 or the lower support member 620 . In this case, the upper support member 610 or the lower support member 620 adjacent to the sensor 712 may have a greater elastic modulus than the other support member. That is, when the sensor 712 is located close to the upper support member 610 , the elastic modulus of the upper support member 610 may be greater than the elastic modulus of the lower support member 620 . In addition, when the sensor 712 is located close to the lower support member 620 , the elastic modulus of the lower support member 620 may be greater than the elastic modulus of the upper support member 610 .

Hereinafter, a support member of a lens driving apparatus according to another embodiment of the present invention will be described in detail with reference to FIG. 5 .

5 is a plan view of an upper support member of a lens driving device according to another embodiment of the present invention.

With respect to the upper support member 610 of the lens driving device 10 according to another embodiment of the present invention, the description of the upper support member 610 of the lens driving device 10 according to an embodiment of the present invention is described above. analogy can be applied. Hereinafter, differences between another embodiment and one embodiment of the present invention will be mainly described.

Referring to FIG. 5 , the upper support member 610 of the lens driving device 10 according to another embodiment of the present invention is positioned in a virtual y-axis direction and faces a first support member 611 and a second support member The member 612 may include a third support member 613 and a fourth support member 614 positioned in the virtual x-axis direction and facing each other. That is, the support member 610 includes the first support member 611 and the second support member 612 opposite to each other in the first direction, and a third opposing third direction and positioned in a second direction orthogonal to the first direction. It may include a support member 613 and a fourth support member 614 .

The first support member 611 may include a first support part 611a positioned closer to the y-axis direction than the x-axis direction, and a second support part 611b positioned closer to the x-axis direction than the y-axis direction. . In addition, the first support member 611 may include a first support part 611a positioned closer to the first direction than the second direction, and a second support part 611b positioned closer to the second direction than the first direction. can In this case, the elastic modulus of the first support part 611a may be less than that of the second support part 611b. In more detail, the width of the first support part 611a (see D3 of FIG. 5 ) may be narrower than the width of the second support part 611b (see D4 of FIG. 5 ). Of course, the elastic modulus of the first support part 611a and the second support part 611b may be changed through thickness, length, and shape rather than width. In this case, as described in the previous embodiment, the amount of tilt in the y-axis direction (refer to A of FIG. 5 ) may be smaller than the amount of tilt in the x-axis direction (refer to B of FIG. 5 ). That is, the tilt amount A sensed through the sensor 712 may be reduced. As described above, when the tilt amount A sensed through the sensor 712 is reduced, the possibility of oscillation is also reduced.

On the other hand, unlike the previous embodiment, when the elastic modulus of the first support part 611a is less than the elastic modulus of the second support part 611b, the tilt amount A in the y-axis direction is further reduced compared to the previous embodiment. There are advantages that can be

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

The lens driving device 10 according to an embodiment of the present invention may receive external power from the terminal portion 422 of the FPCB 420 exposed to the outside of the cover can 100 . On the other hand, the power supplied to the FPCB 420 may be supplied to the coil, which is the third mover 410 energized with the FPCB 420 . In this case, the first mover 200 and the second mover 300 move or tilt in the horizontal direction due to electromagnetic interaction between the coil as the third mover 410 and the magnet as the second mover 320 . Therefore, an image stabilization (OIS) function may be performed. At this time, the housing 320 is elastically supported by the lateral support member 630 with respect to the base 600 or the FPCB 420 .

In addition, the power supplied to the FPCB 420 may be supplied to the upper support member 610 through the side support member 630 . At least six side support members 630 supply power to each of the first to sixth upper support members 611, 612, 613, 614, 615, and 616 spaced apart from each other. The first to fourth upper support members 611 , 612 , 613 , and 614 are connected to the terminal 713 of the first sensor unit 710 to supply power to the sensor 712 and transmit and receive information. Meanwhile, the fifth upper support member 615 and the sixth support member 616 conduct electricity with the lower support member 620 through the connecting member 640 . In this case, the lower support member 620 may include a first lower support member 621 and a second lower support member 622 that are provided to be spaced apart from each other. In this case, the fifth upper support member 615 may be connected to the first lower support member 621 , and the sixth upper support member 616 may be connected to the second lower support member 622 . Meanwhile, the first lower support member 621 and the second lower support member 622 may supply power to the coil that is the first movable unit 220 . As such, when power is supplied to the coil, which is the first movable part 220 , the first movable part 200 causes the second movable part 300 due to electromagnetic interaction generated between the magnet and the second movable part 320 . The auto focus (AF) function is performed by moving in the vertical direction (vertical direction).

Meanwhile, when the first mover 200 performs an autofocus (AF) function while moving up and down with respect to the second mover 300 as described above, the first sensor unit provided in the first mover 200 . 710 may sense a position of the first mover 200 or a relative movement of the first mover 200 with respect to the second mover 300 . The value sensed by the first sensor unit 710 is processed by a control unit (not shown) and used for auto focus feedback. In the related art, when an impact corresponding to the secondary resonant frequency of the support member 600 is applied in a state in which the autofocus feedback is applied as described above, the support member 600 oscillates. However, in the lens driving device according to an embodiment of the present invention, even when an impact is applied to the support member 600 as described above, the tilt amount sensed by the first sensor unit 710 is reduced to reduce the possibility of an oscillation phenomenon. it will be minimized

In the above, even though it has been described that all components constituting the embodiment of the present invention operate by being combined or combined into one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, terms such as "include", "compose" or "have" described above mean that the corresponding component may be inherent unless otherwise stated, so excluding other components Rather, it should be construed as being able to further include other components. All terms including technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: cover can
200: first operator
300: second operator
400: stator
500: base
600: support member
700: sensor unit

Claims (14)

housing;
a bobbin disposed within the housing;
a coil disposed on the bobbin;
a sensor unit coupled to the bobbin;
a magnet disposed on the housing; and
and an upper support member connecting the housing and the bobbin,
The upper support member includes a first upper support member having a first area, a second upper support member having a second area disposed in a diagonal direction from the first area, and a third upper support member having a third area; ; a sixth upper side support member having a sixth area disposed closer to the second area than to the fourth area;
The fifth upper-side support member is spaced apart from the first upper-side support member, and the sixth upper-side support member is spaced apart from the second upper-side support member.
According to claim 1,
The housing includes a first corner area, a second corner area located in a diagonal direction to the first corner area, a third corner area, and a fourth corner area located in a diagonal direction to the third corner area,
The first area and the fifth area are disposed in the first corner area, and the second area and the sixth area are disposed in the second corner area.
3. The method of claim 2,
The first upper-side support member is spaced apart from the third upper-side support member, and the second upper-side support member is spaced apart from the fourth upper-side support member.
According to claim 1,
and a lower support member connecting a lower portion of the housing and a lower portion of the bobbin.
5. The method of claim 4,
a circuit board disposed under the housing;
and a lateral support member electrically connecting the upper support member and the circuit board.
6. The method of claim 5,
The lateral support member includes a first support member coupled to the first area, a second support member coupled to the second area, a third support member coupled to the third area, and a fourth support member coupled to the fourth area A lens driving device comprising a support member, a fifth support member coupled to the fifth area, and a sixth support member coupled to the sixth area.
7. The method of claim 6,
The lower support member includes a first lower support member and a second lower support member spaced apart from the first lower support member,
The first lower support member is electrically connected to one of the first to sixth upper support members, and the second lower support member is electrically connected to the other one of the first to the sixth upper support members. Device.
Base;
a housing disposed on the base;
a bobbin disposed within the housing;
a first coil disposed on the bobbin;
a sensor unit coupled to the bobbin;
a magnet disposed on the housing;
an upper elastic member connecting the housing and the bobbin;
a circuit board disposed between the base and the housing; and
and a lateral support member coupled to at least one of the base and the circuit board and the upper elastic member and including a plurality of support members,
The upper elastic member includes a first upper elastic member having a first region, a second upper elastic member having a second region disposed in a diagonal direction from the first region, and a third upper elastic member having a third region; , a fourth upper elastic member having a fourth region disposed in a diagonal direction from the third region, and a fifth upper elastic member having a fifth region disposed closer to the first region than the third region; a sixth upper elastic member having a sixth region disposed adjacent to the second region than the fourth region;
The first upper elastic member is a lens driving device spaced apart from the fifth upper elastic member.
9. The method of claim 8,
The housing includes a first corner area, a second corner area located in a diagonal direction to the first corner area, a third corner area, and a fourth corner area located in a diagonal direction to the third corner area,
The first area and the fifth area are disposed in a first edge area of the housing, and the second area and the sixth area are disposed in the second edge area.
9. The method of claim 8,
Two of the plurality of upper support members are respectively coupled to the first region and the second region.
9. The method of claim 8,
The second upper elastic member is a lens driving device spaced apart from the sixth upper elastic member.
9. The method of claim 8,
At least one of the plurality of support members is electrically connected to the upper elastic member and the first coil.
9. The method of claim 8,
It includes a sensor unit for detecting the position of the bobbin,
At least one of the plurality of support members is a lens driving device electrically connected to the upper elastic member and the sensor unit.
printed circuit board;
an image sensor disposed on the printed circuit board;
The lens driving device of any one of claims 1 to 13 disposed on the printed circuit board; and
A camera module including a lens coupled to the bobbin of the lens driving device.

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