KR102500031B1 - A lens moving unit, and camera module and optical instrument including the same - Google Patents

Abstract

An embodiment includes a housing including a plurality of protrusions provided on an upper surface, a magnet disposed on the side of the housing, a first coil disposed on an outer circumferential surface, and a bobbin moving by interaction between the magnet and the first coil, an upper elastic member coupled to the bobbin and the housing, a sensing coil disposed on a side of the housing between the protrusions and the magnet, and generating an induced voltage by interaction with the first coil; At least a portion of the elastic member is disposed on the upper surface of the housing between the projections.

Description

Lens driving device, and camera module and optical device including the same

The embodiment relates to a lens driving device and a camera module and optical device including the same.

Since it is difficult to apply the technology of a voice coil motor (VCM) used in a conventional camera module to a camera module for ultra-small size and low power consumption, related research has been actively conducted.

BACKGROUND OF THE INVENTION Demand and production of electronic products such as smartphones and camera-equipped mobile phones are increasing. Cameras for mobile phones tend to be high-resolution and miniaturized, and accordingly, actuators are becoming miniaturized, large-diameter, and multi-functional. In order to implement a camera for a high-pixel mobile phone, additional functions such as performance improvement, auto focusing, shutter shake improvement, and zoom function of the mobile phone camera are required.

Embodiments provide a lens driving device that can sufficiently secure a separation distance between a sensing coil and a first coil and at the same time prevent spatial restrictions on installation of a housing of an upper elastic member, and a camera module and optical device including the same.

A lens driving device according to an embodiment includes a housing including a plurality of protrusions provided on an upper surface; a magnet disposed on a side of the housing; a bobbin having a first coil disposed on an outer circumferential surface and moving by interaction between the magnet and the first coil; an upper elastic member coupled to the bobbin and the housing; and a sensing coil disposed on a side of the housing between the protrusions and the magnet and generating an induced voltage by interaction with the first coil, wherein at least a portion of the upper elastic member is disposed between the protrusions. It is disposed on the upper surface of the housing.

Sides of the housing include first side portions on which the magnet is disposed; and second side portions connecting two adjacent first side portions among the first side portions, wherein the sensing coil is wound clockwise or counterclockwise with respect to an optical axis of the first and second side portions. It can be placed on the outer surface.

The plurality of protrusions may include a first protrusion provided on an upper surface of at least one of the first side parts; and a second protrusion provided on an upper surface of at least one of the second side parts, wherein at least a portion of the upper elastic member may be disposed on the upper surface of the housing between the first protrusion and the second protrusion. there is.

The upper elastic member may include an inner frame coupled to the bobbin; an outer frame coupled to an upper surface of the housing; and a frame connecting portion connecting the inner frame and the outer frame, and a portion of the outer frame may be disposed on an upper surface of the housing between the first protrusion and the second protrusion.

A connection portion between the outer frame and the frame connecting portion may be disposed on an upper surface of the housing between the first protrusion and the second protrusion.

A seating groove may be formed on outer surfaces of the first and second side parts of the housing, and the sensing coil may be disposed in the seating groove.

The sensing coil may be disposed at an upper end of an outer surface of the side portion of the housing to be spaced apart from the upper elastic member disposed on the upper surface of the housing.

The plurality of protrusions are disposed in a first area of the upper surface of the housing, at least a portion of the upper elastic member is disposed in a second area of the upper surface of the housing positioned between the plurality of protrusions, and the housing A second area of the upper surface of the housing may open to an outer surface of the side of the housing.

A sensing coil disposed in the housing may overlap each other in an optical axis direction with the plurality of protrusions.

The first protrusion may be arranged to align with the center of the top surface of at least one of the first side parts, and the second protrusion may be arranged to align with the center of the top surface of at least one of the second side parts.

The first protrusion may have a straight shape, and the second protrusion may have a curved shape.

A support member connected to an outer frame of the upper elastic member may be further included, and the support member may be positioned inside the sensing coil.

A lens driving device according to another embodiment includes a housing; a magnet disposed in the housing; A bobbin having a first coil disposed on an outer circumferential surface of the bobbin; an upper elastic member coupled to the bobbin and the housing; and a sensing coil disposed on a side of the housing and generating an induced voltage by interaction with the first coil, wherein the housing has at least one concave portion provided on an upper surface, and at least one of the upper elastic member A portion is disposed in at least one concave portion of the housing, and at least a portion of the upper elastic member disposed in the at least one concave portion is open from an upper surface of the housing.

The at least one concave portion may be open to an outer surface of the side portion of the housing, and at least a portion of the upper elastic member disposed in the at least one concave portion may be exposed to an outer surface of the side portion of the housing.

The upper elastic member may include an inner frame coupled to the bobbin; an outer frame coupled to an upper surface of the housing; and a frame connecting portion connecting the inner frame and the outer frame, and at least a portion of the outer frame may be disposed in the at least one concave portion.

The sensing coil may be spaced apart from the upper elastic member disposed in the concave portion.

The at least one concave portion may be provided on the same side as the side of the housing where the magnet is disposed.

The at least one concave portion may be provided adjacent to at least one side of an upper surface of the housing.

The at least one concave portion may include a bottom and a side surface, the sensing coil may be disposed below a bottom of the at least one concave portion, and at least a portion of the upper elastic member may be disposed to contact the bottom of the at least one concave portion. there is.

At least a portion of the outer frame disposed in the at least one concave portion may overlap the sensing coil in an optical axis direction.

A depth of a bottom of the at least one concave portion may be greater than or equal to a height of at least a portion of the upper elastic member disposed at the bottom of the concave portion.

An upper support protrusion coupled to at least a portion of the upper elastic member may be provided at a bottom of the at least one concave portion.

A lens driving device according to another embodiment includes a housing including a plurality of side parts; magnets disposed on a plurality of sides of the housing; a bobbin having a first coil disposed on an outer circumferential surface and moving by interaction between the magnet and the first coil; an upper elastic member coupled to the bobbin and the housing; sensing coils disposed on sides of the housing and generating an induced voltage by interacting with the first coil; and a second coil disposed to face the magnet and moving the housing by interaction with the magnet, wherein upper surfaces of the plurality of side parts of the housing include a first area and a second area, At least a portion of the upper elastic member is disposed in the second area, the first area has a structure that protrudes based on the second area, and the second area has a structure that is recessed based on the first area.

The second region may open to outer and inner surfaces of the side parts of the housing, respectively.

A camera module according to an embodiment includes a lens barrel; a lens driving device according to an embodiment for moving the lens barrel; and an image sensor that converts an image incident through the lens driving device into an electrical signal.

An optical device according to an embodiment includes a display module including a plurality of pixels whose color is changed by an electrical signal; A camera module according to an embodiment that converts an image incident through a lens into an electrical signal; and a control unit controlling operations of the display module and the camera module.

According to the embodiment, a sufficient separation distance between the sensing coil and the first coil may be sufficiently secured, and at the same time, spatial limitations of installation of the housing of the upper elastic member may be prevented.

1 shows an exploded perspective view of a lens driving device according to an embodiment.
FIG. 2 is a combined perspective view of the lens driving device excluding the cover member of FIG. 1 .
Figure 3 shows a perspective view of the bobbin shown in Figure 1;
FIG. 4 shows a first exploded perspective view of the housing and magnet shown in FIG. 1 .
FIG. 5 shows a second exploded perspective view of the housing and magnet shown in FIG. 1 .
FIG. 6 is a perspective view illustrating a combination of an upper elastic member, a lower elastic member, a base, a second coil, a support member, and a circuit board shown in FIG. 1;
FIG. 7 is an exploded perspective view of the second coil, the circuit board, and the base shown in FIG. 1 .
FIG. 8 is a side perspective view of the lens driving device shown in FIG. 2 .
FIG. 9 is a cross-sectional view taken along line I-I' of the lens driving device shown in FIG. 2. Referring to FIG.
FIG. 10 is a cross-sectional view taken along line II-II' of the lens driving device shown in FIG. 2 .
FIG. 11 is a top view illustrating the arrangement of sensing coils shown in FIG. 8 .
FIG. 12 shows a top view of the dotted line portion of FIG. 8 .
Figure 13 shows a side perspective view of the dotted line portion of Figure 8;
14 shows an exploded perspective view of a camera module according to an embodiment.
15 is a perspective view of a portable terminal according to an embodiment.
FIG. 16 shows a configuration diagram of the portable terminal shown in FIG. 15 .

Hereinafter, embodiments will be clearly revealed through the accompanying drawings and description of the embodiments. In the description of the embodiment, each layer (film), region, pattern or structure is “on” or “under” the substrate, each layer (film), region, pad or pattern. In the case where it is described as being formed in, "up / on" and "under / under" include both "directly" or "indirectly" formed through another layer. do. In addition, the criterion for the upper/upper or lower/lower of each layer will be described based on the drawings. Also, like reference numerals denote like elements throughout the description of the drawings.

Hereinafter, with reference to the accompanying drawings, a lens driving device according to an embodiment will be described as follows. For convenience of description, the lens driving device according to the embodiment is described using a Cartesian coordinate system (x, y, z), but it may be described using another coordinate system, and the embodiment is not limited thereto. In each figure, the x-axis and the y-axis mean directions perpendicular to the z-axis, which is the optical axis direction, and the z-axis direction, which is the optical axis (OA) direction, is referred to as a 'first direction', and the x-axis direction is referred to as a 'second direction'. , and the y-axis direction may be referred to as a 'third direction'.

An 'image stabilization device' applied to a small camera module of a mobile device such as a smartphone or tablet PC prevents the outline of the captured image from being formed clearly due to vibration caused by the user's hand shake when capturing a still image. It may refer to a device configured to

Also, an 'auto focusing device' is a device that automatically focuses an image of a subject on an image sensor surface. Such an image stabilization device and auto focusing device may be configured in various ways. A lens driving device according to an embodiment moves an optical module composed of at least one lens in a first direction or a second direction perpendicular to the first direction. and may perform an image stabilization operation and/or an auto focusing operation by moving with respect to a surface formed by the third direction.

FIG. 1 is an exploded perspective view of the lens driving device 100 shown in FIG. 1 , and FIG. 2 is a combined perspective view of the lens driving device excluding the cover member 300 of FIG. 1 .

1 and 2, the lens driving device 100 includes a bobbin (bobbin, 110), a first coil 120, a magnet (magnet, 130), a housing 140, an upper elastic member 150, a lower side It includes an elastic member 160 and a sensing coil 170 .

In addition, the lens driving apparatus 100 may further include a support member 220 , a second coil 230 , an optical image stabilization (OIS) position sensor 240 , and a circuit board 250 .

Also, the lens driving device 100 may further include a base 210 and a cover member 300 .

First, the cover member 300 will be described.

The cover member 300 includes a bobbin 110, a first coil 120, a magnet 130, a housing 140, an upper elastic member 150, and a lower elastic member in an accommodation space formed together with the base 210. It accommodates the member 160, the sensing coil 170, the support member 220, the second coil 230, the OIS position sensor 240, and the circuit board 250.

The cover member 300 may have a box shape with an open bottom, an upper end and side walls, and a lower part of the cover member 300 may be coupled to an upper part of the base 210 . The upper end of the cover member 300 may have a polygonal shape, for example, a quadrangle or an octagon.

The cover member 300 may have a hollow at an upper end for exposing a lens (not shown) coupled to the bobbin 110 to external light. In addition, a window made of a light-transmitting material may be additionally provided in the hollow of the cover member 300 to prevent foreign matter such as dust or moisture from penetrating into the camera module.

The material of the cover member 300 may be a non-magnetic material such as SUS to prevent sticking to the magnet 130, but may be formed of a magnetic material to function as a yoke.

Next, the bobbin 110 will be described.

FIG. 3 shows a perspective view of the bobbin 110 shown in FIG. 1 .

Referring to FIG. 3 , the bobbin 110 is located inside the housing 140 and is movable in a first direction by electromagnetic interaction between the coil 120 and the magnet 130 .

Although not shown, the bobbin 110 may include a lens barrel (not shown) in which at least one lens is installed, and the lens barrel may be coupled to the inside of the bobbin 110 in various ways. .

The bobbin 110 may have a hollow for mounting a lens or lens barrel. The hollow shape of the bobbin 110 may match the shape of the lens or lens barrel to be mounted, and may be, for example, circular, elliptical, or polygonal, but is not limited thereto.

The bobbin 110 includes at least one upper support protrusion 113 disposed on the upper surface and coupled and fixed to the inner frame 151 of the upper elastic member 150, and disposed on the lower surface of the lower elastic member 160. At least one lower support protrusion (not shown) coupled to and fixed to the inner frame 161 may be provided.

The bobbin 110 may have an upper escape groove 112 provided in a region of an upper surface corresponding to or aligned with the frame connecting portion 153 of the upper elastic member 150 . In addition, the bobbin 110 may have a lower escape groove (not shown) in a region of the lower surface corresponding to or aligned with the connection portion 163 of the lower elastic member 160 . In addition, in the case of another embodiment, the connection part of the upper elastic member and the bobbin are designed not to interfere with each other, so that the upper escape groove and/or the lower escape groove of the bobbin may not be provided.

The bobbin 110 may have at least one groove (not shown) in which the first coil 120 is disposed on an outer circumferential surface. The first coil 120 may be disposed or seated in the groove, or may be directly wound or wound around the groove so as to rotate clockwise or counterclockwise with respect to the optical axis OA. The shape and number of grooves may correspond to the shape and number of coils disposed on the outer circumferential surface of the bobbin 110 . In another embodiment, the bobbin 110 may not have a seating groove for coils, and the first coil 120 may be directly wound or wound on the outer circumferential surface of the bobbin 110 and fixed.

Next, the first coil 120 will be described.

The first coil 120 is disposed on the outer circumferential surface of the bobbin 110 and may be a driving coil that electromagnetically interacts with the magnet 130 disposed on the housing 140 . A driving signal (eg, a driving current) may be applied to the first coil 120 to generate electromagnetic force by interaction between the first coil 120 and the magnet 130 .

According to Fleming's left hand rule, the auto focus (AF) movable unit may move in the first direction by the electromagnetic force generated by the interaction between the first coil 120 and the magnet 130 . By controlling the driving signal applied to the first coil 120 to adjust the strength and/or direction of the electromagnetic force, it is possible to control the movement of the AF movable unit in the first direction, thereby enabling an auto focusing function. can be performed

The AF movable unit may include the bobbin 110 elastically supported by the upper and lower elastic members 150 and 160 and components mounted on the bobbin 110 and moving together with the bobbin 110 . For example, the AF moving unit may include the bobbin 110 , the first coil 120 , and a lens (not shown) mounted on the bobbin 110 .

The first coil 120 may be wound around the optical axis OA to rotate clockwise or counterclockwise around the outer circumferential surface of the bobbin 110 . In another embodiment, the first coil 120 may be implemented in the form of a coil ring wound in a clockwise or counterclockwise direction around an axis perpendicular to the optical axis OA, and the number of coil rings is the number of magnets 130. It may be the same as, but is not limited thereto.

The first coil 120 may be electrically connected to at least one of the upper elastic member 150 and the lower elastic member 160 to receive a driving signal.

Next, the housing 140 will be described.

The housing 140 supports the magnet 130 and the sensing coil 170, and allows the bobbin 110 to move in the first direction by the electromagnetic force generated by the interaction between the first coil 120 and the magnet 130. The bobbin 110 can be accommodated inside.

4 shows a first exploded perspective view of the housing 140 and the magnet 130 shown in FIG. 1, and FIG. 5 shows a second exploded perspective view of the housing 140 and the magnet 130 shown in FIG.

Referring to FIGS. 4 and 5 , the housing 140 may have a hollow column shape as a whole and may include a plurality of side parts 141 and 142 forming a hollow shape. For example, the housing 140 may include a plurality of side parts 141 and 142 forming a polygonal (eg, quadrangular or octagonal) or circular hollow.

The housing 140 may include a top surface 401 and a side portion. The side of the housing 140 may include a plurality of side parts 141 and 142 , and upper surfaces of the side parts may form the upper surface 401 of the housing 140 .

For example, the housing 140 may include first side parts 141 spaced apart from each other and second side parts 142 spaced apart from each other.

For example, the length of each of the first side parts 141 of the housing 140 may be greater than the length of each of the second side parts 142 . For example, the first side parts 141 of the housing 140 may be portions corresponding to sides of the housing 140, and the second side parts 142 of the housing 140 may correspond to corners of the housing 140. may be a part of

A magnet 130 may be disposed or installed on the first side parts 141 of the housing 140 .

Each of the second side parts 142 of the housing 140 may be located between two adjacent first side parts, and the first side parts 141 may be connected to each other.

Support members 220 may be disposed on the second side parts 142 of the housing 140 .

For example, the support member 220 may be coupled to the outer frame 152 of the upper elastic member 150 by passing through the through hole 147 provided in the second side parts 142 . For example, the through hole 147 may pass through the second side portions 142 of the housing 142 and the upper surface of the housing 140 adjacent to the second side portions 142 .

The first side parts 141 of the housing 140 interconnect the second side parts 142 of the housing 140 and may include a flat surface having a certain depth. Each of the first side parts 141 of the housing 140 may have an area equal to or larger than that of the corresponding magnet 130 .

The housing 140 may include a magnet seating portion 141a for accommodating the magnet 130 and a sensing coil seating groove 141b for winding or accommodating the sensing coil 170 .

The magnet seat 141a may be provided at an inner lower end of at least one of the first side parts 141 of the housing 140 . For example, the magnet seating part 141a may be provided at the inner lower end of each of the first side parts 141, and each of the magnets 130 may be inserted into and fixed to a corresponding one of the magnet seating parts 141a. there is.

The magnet seating portion 141a of the housing 140 may be formed as a concave groove corresponding to the size of the magnet 130 . An opening may be formed on the bottom surface of the magnet seating portion 141a of the housing 140 facing the second coil 240, and the bottom surface of the magnet 130 fixed to the magnet seating portion 141a is the second coil 240. It may face the coil 230 .

The sensing coil seating groove 141b of the housing 140 may be formed in a shape recessed from an outer side of at least one of the first side parts 141 and the second side parts 142 of the housing 140, Each of the first side parts 141 and/or the second side parts 142 may be formed from one end to the other end. For example, the sensing coil seating groove 141b of the housing 140 may be provided on top of outer surfaces of the first and second side parts 141 and 142 .

For example, the sensing coil seating groove 141b of the housing 140 may be spaced apart from the upper surface 401 of the housing 140 and provided at the upper end of the outer surfaces of the first and second side parts 141 and 142 . It is not limited.

The depth of the sensing coil seating groove 141b may be greater than or equal to the thickness of the wound sensing coil 170 . For example, the sensing coil 170 disposed in the sensing coil seating groove 141b may not protrude from outer surfaces of the first and second side parts of the housing 140 . This is to prevent the sensing coil 170 disposed in the sensing coil seating groove 141b from escaping out of the sensing coil seating groove 141b.

The sensing coil seating groove 141b may be provided on the magnet seating portion 141a where the magnet 130 is seated. For example, the sensing coil seating groove 141b may not overlap the magnet seating portion 141a in a direction perpendicular to the optical axis OA, but is not limited thereto.

The first side portion 141 of the housing 140 may be disposed parallel to the side surface of the cover member 300 . Also, the area of the first side part 141 of the housing 140 may be larger than the area of the second side part 142 .

The second side portion 142 of the housing 140 may have a through hole 147 forming a path through which the support member 220 passes. For example, the housing 140 may include a through hole 147 passing through an upper portion of the second side portion 142 . The number of through holes 147 may be the same as the number of support members.

In addition, in order to prevent the sensing coil 170 disposed in the sensing coil seating groove 141b from being separated from the housing 140, the housing 140 includes a protrusion 144 protruding from the upper surface 401 in the first direction. can have The protrusion 144 is provided on the sensing coil seating groove 141b and can prevent the sensing coil 170 wound on the upper end of the side of the housing 140 from escaping out of the side of the housing 140 .

For example, the protrusion 144 of the housing 140 includes the first protrusions 144a1 to 144a4 disposed on the top or upper surface of the first side parts 141 and the top of the second side parts 142 of the housing 140. Alternatively, it may include second protrusions 144b1 to 144b4 disposed on the upper surface.

The first protrusions 144a1 to 144a4 may be disposed apart from each other, and the second protrusions 144b1 to 144b4 may be disposed apart from each other. Also, the first protrusions 144a1 to 144a4 and the second protrusions 144b1 to 144b4 may be spaced apart from each other.

For example, each of the first protrusions 144a1 to 144a4 may be arranged to be aligned with the center of the upper surface of the corresponding first side portions 141, and the second protrusions 144b1 to 144b4 may be aligned with the corresponding second side portions 144b1 to 144b4. (142) can be arranged to align with the center of the top surface.

For example, outer circumferential surfaces of the first protrusions 144a1 to 144a4 may be straight or linear in the longitudinal direction, and outer circumferential surfaces of the second protrusions 144b1 to 144b4 may be curved or curved in the longitudinal direction.

For example, the sensing coil seating groove 141b may be spaced apart from the lower ends of the first protrusions 144a1 to 144a4 and the lower ends of the second protrusions 144b1 to 144b4, but is not limited thereto.

In another embodiment, the sensing coil seating groove 141b may contact lower ends of the first protrusions 144a1 to 144a4 and lower ends of the second protrusions 144b1 to 144b4.

In order to prevent direct collision with the inner surface of the cover member 300 shown in FIG. 1 , stoppers 412a and 412b may be provided on the upper surface of the protrusion 144 of the housing 140 .

For example, the housing 140 includes a first stopper 412a protruding in a first direction from the top surface of each of the first protrusions 144a1 to 144a4 and a top surface of each of the second protrusions 144b1 to 144b4 in the first direction. A protruding second stopper 412b may be provided.

For example, the first stopper 412a may be provided to align with the center of the corresponding first protrusion, and may have a straight or line shape in the longitudinal direction, and the second stopper 412b may be positioned at the center of the corresponding second protrusion. It may be arranged to be aligned and may be curved or curved in the longitudinal direction.

At least one concave portion may be provided on an upper surface of the housing 140 positioned between the protrusions 144a1 to 144a4 and 144b1 to 144b4.

For example, upper surfaces of the side parts 141 and 142 of the housing 140 may include a first area S1 and a second area S2.

The protrusion 144 of the housing 140 may correspond to the first area S1 of the upper surface 401 of the housing 140, and the protrusion 144 may correspond to the first region S1 of the upper surface 401 of the housing 140. The second region S2, which is the remaining portion except for the first region S1, may be exposed.

In addition, the concave portion of the housing 140 may correspond to the second region S2 of the upper surface 401 of the housing 140, and the second region S2 of the upper surface 401 of the housing 140 may correspond to the housing 140. It may be open or exposed to the outer surface and/or the inner surface of the side (eg, 141) of 140.

For example, the first area S1 of the housing 140 may protrude based on the second area S2, and the second area S2 may have a structure depressed based on the first area S1. can And, the second region S2 may have a structure that is open to the outer and/or inner surfaces of the side parts 141 and 142 of the housing 140.

The sensing coil seating groove 141b may include first grooves 144-1 provided on the first side parts 141 and second grooves 144-2 provided on the second side parts 142. there is.

When one side of the housing 140 in the hollow direction of the through hole 147 is referred to as the inside and the opposite side is referred to as the outside, the second groove 144-2 of the sensing coil seating groove 141b is the support member. 220 may be located outside the through hole 147 passing therethrough.

For example, the second groove 144-2 of the sensing coil mounting groove 141b based on the optical axis OA or an imaginary straight line parallel to the optical axis OA passing through the center of the hollow of the housing 140 is a through hole 147 ) can be located further away.

For example, the first separation distance between an imaginary straight line that passes through the center of the hollow of the housing 140 and is parallel to the optical axis OA and the second groove 144-2 of the sensing coil mounting groove 141b is the hollow of the housing 140. It may be greater than the second separation distance between the through hole 147 and an imaginary straight line passing through the center of and parallel to the optical axis OA.

A part of the second side portion 142 of the housing 140 may be disposed between the second groove 144-2 and the through hole 147 so that the support member 220 and the sensing coil 170 are spaced apart from each other. there is.

A depression or a groove 402 may be provided on the side of the second groove 144 - 2 provided on the second side parts 142 .

The housing 140 may have at least one upper support protrusion 143 coupled to the outer frame 152 of the upper elastic member 150 on its upper end or upper surface.

The upper support protrusion 143 of the housing 140 may be formed on an upper surface of at least one of the first side parts 141 and the second side parts 142 of the housing 140 .

For example, the upper support protrusion 143 may be provided in the second area S2 of the upper surface 401 of the housing 140 positioned between the first protrusions 144a1 to 144a4 and the second protrusions 144b1 to 144b4. can

In addition, the housing 140 may have a lower support protrusion 145 coupled to and fixed to the outer frame 162 of the lower elastic member 160 on its lower surface.

In order to form a path through which the supporting member 220 passes, as well as to secure a space for filling the gel-type silicone that can act as a damper, the housing 140 has a groove formed on the second side portion 142 ( 142a) may be provided. For example, damping silicon may be filled in the recess 142a of the housing 140 .

In order to prevent the housing 140 from colliding with the cover member 300 when it moves in the second and/or third directions, the housing 140 is provided with a second or third portion from the outer surface of the first side parts 141. At least one stopper (not shown) protruding in a direction may be provided.

In order to prevent the bottom surface of the housing 140 from colliding with the base 210 and/or the circuit board 250 to be described later, the housing 140 may further include a stopper (not shown) protruding from the bottom surface. , The housing 140 may be spaced downward from the base 210 by the stopper formed on the upper surface 401 and the lower surface of the housing 140, and may be spaced apart from the cover member 300 upward and downward The height in the direction of the optical axis OA may be maintained without interference. Accordingly, the housing 140 may perform a shifting operation in the second and third directions, i.e., forward, backward, left and right directions, in a plane perpendicular to the optical axis OA.

Next, the magnets 130 (130-1 to 130-4) will be described.

The magnet 130 may be disposed on the housing 140 such that at least a portion of the magnet 130 overlaps the first coil 120 in a direction perpendicular to the optical axis OA. For example, the magnet 130 may be inserted or disposed in the seating portion 141a of the housing 140 .

The magnet 130 is disposed apart from the sensing coil 170 mounted on the housing 140, and a part of the housing 140 may be disposed between the sensing coil and the magnet 130.

The magnet 130 may be disposed below the sensing coil 170 .

For example, in order to reduce mutual interference between the magnet 130 and the sensing coil 170, the magnet 130 and the sensing coil 170 may be arranged so as not to overlap each other in the direction of the optical axis OA at the initial position, but it is limited thereto. It is not, and in another embodiment, both may be arranged to overlap each other.

For example, the sensing coil 170 may be disposed on outer surfaces of the first and second side parts 141 and 142 of the housing 140, and the magnet 130 may be disposed on the inside of the first side part 141 of the housing 140. Can be placed on the side.

In another embodiment, each of the magnets 130 may be disposed spaced apart from the sensing coil 170 on the outer surface of the first side portion 141 of the housing 140 .

The shape of the magnet 130 may be a shape corresponding to the first side portion 141 of the housing 140, for example, a rectangular parallelepiped shape, but is not limited thereto.

The magnet 130 may be composed of one body, and a surface facing the first coil 120 may be arranged to have an S pole and a surface opposite to the first coil 120 to have an N pole. However, it is not limited thereto, and a converse configuration is also possible.

At least two or more magnets 130 may be installed in the housing 140 and may be disposed to face each other. For example, the magnet 130 may have a substantially quadrangular plane, or may have a triangular or rhombus shape.

For example, the magnet 130 may be disposed on two first side parts facing each other among the first side parts 141 of the housing 140 .

Next, the upper elastic member 150, the lower elastic member 160, and the support member 220 will be described.

The upper elastic member 150 and the lower elastic member 160 support the bobbin 110 by elasticity. The upper elastic member 150 is connected to the upper part of the bobbin 110 and the upper part of the housing 140 to support the upper part of the bobbin 110 and the upper part of the housing 140 . The lower elastic member 160 is connected to the lower part of the bobbin 110 and the lower part of the housing 140 to support the lower part of the bobbin 110 and the lower part of the housing 140 .

At least a portion of the upper elastic member 150 may be disposed on the upper surface of the side parts 141 and 142 of the housing 140 between the protrusions 144a1 to 144a4 and 144b1 to 144ab. For example, at least a portion of the upper elastic member 150 may be disposed on the upper surface of the first side portion 141 of the housing 140 between the first protrusions 144a1 to 144a4 and the second protrusions 144b1 to 144b4. .

For example, a portion of the outer frame 152 of the upper elastic member 150 may be disposed on the upper surface of the first side portion 141 of the housing 140 between the first protrusion and the second protrusion.

The part 901 where the first coupling part 510 of the upper elastic member 150 and the frame connection part 153 are connected is the housing 140 between the first protrusions 144a1 to 144a4 and the second protrusions 144b1 to 144b4. It may be disposed on the upper surface of the first side portion 141 of ).

Also, at least a portion of the upper elastic member 150 may be disposed in at least one concave portion of the upper surface of the housing 140 . At least one concave portion of the housing 140 may be open to an outer surface or/and an inner surface of the side of the housing 140, and at least a portion of the upper elastic member 150 disposed in the at least one concave portion is disposed in the housing ( 140) may be exposed to the outer surface of the side.

Also, for example, at least one concave portion of the housing 140 may be provided on the same side as the side of the housing 140 where the magnet 130 is disposed, but is not limited thereto, and in another embodiment, the housing 140 At least one concave portion may be provided on a side different from the side of the housing 140 where the magnet 130 is disposed.

Also, at least one concave portion of the housing 140 may be provided adjacent to at least one side of an upper surface of the housing 140 .

At least a portion of the outer frame of the upper elastic member 150 may be disposed in at least one concave portion of the housing 140 . The sensing coil 170 may be disposed apart from the upper elastic member 150 disposed in the concave portion of the housing 140, and at least a portion of the outer frame of the upper elastic member 150 disposed in the at least one concave portion. may overlap with the sensing coil 170 in the optical axis direction.

For example, at least one concave portion of the housing 140 may include a bottom and a side surface, the sensing coil 170 may be disposed below the bottom of the concave portion of the housing 140, and at least one of the upper elastic member 150 may be disposed below the bottom of the concave portion. Some may be arranged so as to contact the bottom of the concave portion.

An upper support protrusion 143 coupled to an outer frame of the upper elastic member 150 may be provided at the bottom of at least one concave portion of the housing 140 .

To prevent separation of the upper elastic member 150, the depth of the bottom of at least one concave portion of the housing 140 may be greater than or equal to the height of at least a portion of the upper elastic member 150 disposed on the bottom of the concave portion. That is, based on the bottom of the concave portion of the housing 140, the height of the upper end or upper surface of the upper elastic member 150 disposed in the concave portion may be lower than or equal to the height of the upper end or upper surface of the protruding portion of the housing 140.

The support member 220 may movably support the housing 140 in a direction perpendicular to the optical axis OA with respect to the base 210, and at least one of the upper or lower elastic members 150 and 160 and the circuit board ( 250) can be electrically connected. For example, the support member 220 may electrically connect the upper elastic member 150 and the circuit board 250 .

FIG. 6 is a perspective view of the combination of the upper elastic member 150, the lower elastic member 160, the base 210, the support member 220, the second coil 230, and the circuit board 250 shown in FIG. indicate

Referring to FIG. 6 , the upper elastic member 150 may be divided into two or more.

For example, the upper elastic member 150 may include first to fourth upper elastic members 150-1 to 150-4 that are electrically isolated from each other and spaced apart from each other. For example, the separated first to fourth upper elastic members 150-1 to 150-4 may be arranged point-symmetrically on an x-y plane based on the center of the bobbin 110 or the housing 140. Here, point symmetry means symmetry in which two shapes overlap each other when two shapes are rotated by 180° based on one rotation center point.

Any one of the first to fourth upper elastic members 150-1 to 150-4 may be electrically connected to a corresponding one of the support members 220. For example, each of the first to fourth upper elastic members 150-1 to 150-4 may be directly connected to a corresponding one of the first to fourth support members 220-1 to 220-4.

Each of the first to fourth upper elastic members 150-1 to 150-4 includes an inner frame 151 connected to the bobbin 110, an outer frame 152 connected to the housing 140, and an inner frame 151 ) and a frame connection unit 153 connecting the outer frame 152 to each other.

For example, the inner frame 151 may be provided with a through hole 151a coupled to the upper support protrusion 113 of the bobbin 110, and the outer frame 152 may be provided with the upper support protrusion 143 of the housing 140. A coupled through hole 152a may be provided.

Two upper elastic members selected from among the first to fourth upper elastic members 150 - 1 to 150 - 4 may be connected to both ends of the first coil 120 . For example, inner frames of two upper elastic members selected from among the first to fourth upper elastic members 150-1 to 150-4 may be electrically connected to both ends of the first coil 120.

Also, two other upper elastic members selected from among the first to fourth upper elastic members 150 - 1 to 150 - 4 may be connected to both ends of the sensing coil 170 . For example, outer frames of the other two upper elastic members selected from among the first to fourth upper elastic members 150-1 to 150-4 may be electrically connected to both ends of the sensing coil 170.

For example, the line of sight of the sensing coil 170 is directly bonded to the outer frame of any one of the first to fourth upper elastic members 150-1 to 150-4 through soldering, and the vertical line of the sensing coil 170 The portion may be directly bonded to the outer frame of the other one of the first to fourth upper elastic members 150-1 to 150-4.

Also, the outer frame 152 of each of the first to fourth upper elastic members 150-1 to 150-4 may be connected to at least one of the support members 220-1 to 220-4. For example, each of the outer frames 152 of the first to fourth upper elastic members 150-1 to 150-4 may be connected to a corresponding one end of the supporting members 220-1 to 220-4. can

The frame connecting portion 153 of the upper elastic member 150 may be bent at least once to form a pattern having a predetermined shape. The bobbin 110 may be elastically supported in an upward and/or downward motion in the first direction through a positional change and fine deformation of the frame connection part 153 of the upper elastic member 150 .

The outer frame 152 of each of the first and fourth upper elastic members 150-1 to 150-4 is coupled to the first coupling part 510 coupled to the housing 140 and to the corresponding support member 220. It may include a second coupling portion 520, and a connection portion 530 connecting the first coupling portion 510 and the second coupling portion 520.

One ends of the support members 220-1 to 220-4 are directly attached to the second coupling part 520 of the outer frame 152 of the upper elastic member 150 by soldering or a conductive adhesive member (eg, conductive epoxy). can be bonded.

The first coupling part 510 of the upper elastic member 150 has one end connected to the frame connection part 153 and has a through hole 152a coupled to the upper support protrusion 143 of the housing 140 .

The connecting portion 530 of the outer frame 152 of each of the first and fourth upper elastic members 150-1 to 150-4 may be straight or bent at least once, and the width of the connecting portion 530 may be It may be narrower than the width of the frame connecting portion 153 of the upper elastic member 150 .

Since the width of the connection part 530 is narrower than the width of the frame connection part 153 of the upper elastic member 150, the connection part 530 can be easily moved in the first direction, and thus the application to the upper elastic member 150 The stress applied to the support member 220 and the stress applied to the supporting member 220 may be dispersed.

For example, the second coupling part 520 of the upper elastic member 150 may have a through hole through which the support member 220 passes, but is not limited thereto.

The lower elastic member 160 includes an inner frame 161 coupled to the lower support projection of the bobbin 110, an outer frame 162 coupled to the lower support projection of the housing 140, and connecting the inner frame 161 and the outer frame. It may include a frame connection unit 163 to do.

In FIG. 6 , the lower elastic member 160 is not divided, but may be divided into two or more in other embodiments.

Next, the sensing coil 170 will be described.

The sensing coil 170 is disposed on the side of the housing 140, for example, on the side parts 141 and 142 of the housing 140. For example, the sensing coil 170 rotates clockwise or counterclockwise with respect to the optical axis OA, and the sensing coil seating groove 141b is provided on the first and second side parts 141 and 142 of the housing 140. can be directly wound on. For example, the sensing coil 170 may be directly wound around the housing 140 in a ring shape.

When the sensing coil is implemented in the form of a coil block and bonded to the top of the housing 140, manual work is required for mounting and bonding the sensing coil. In this case, it is not easy to implement the sensing coil in a block shape according to the shape of the top surface of the housing, and since the sensing coil is manually bonded to the housing, reliability of bonding between the sensing coil and the housing may deteriorate. In addition, since the sensing coil is disposed adjacent to the upper elastic member at the upper end of the housing, installation of the upper elastic member may be restricted, and bonding and soldering with the upper elastic member are not easy.

On the other hand, in the embodiment, since the sensing coil 170 is directly wound on the sensing coil seating groove 141b provided on the first and second side parts 141 and 142 of the housing 140, the sensing coil 170 is mounted on the housing 140. ), it is not necessary to manually attach or bond to the top of the sensing coil 170 and the housing 140 and between the sensing coil 170 and the upper elastic member 150, it is possible to prevent a decrease in bonding reliability.

In addition, since the sensing coil 170 is disposed under the upper elastic member 150, there is no spatial restriction in installing the upper elastic member 150 on the top of the housing 140.

In addition, each of the line-of-sight portion and vertical line portion of the sensing coil 170 is placed in contact with a region of the first sidewall 141 or the second sidewall 142 of the housing 140, and the upper elastic member is soldered. Because it is bonded to one area of the outer frame 152 of 150, the embodiment can easily perform a soldering operation.

The driving signal applied to the first coil 120 may be an AC signal (eg, AC current). For example, the AC signal may be a sine wave signal or a pulse signal (eg, a Pulse Width Modulation (PWM) signal). Alternatively, in another embodiment, the driving signal applied to the first coil 120 may include an AC signal (eg, AC current) and a DC signal (eg, DC current). Applying an AC signal to the first coil 120 is to generate an electromotive force or an induced voltage in the sensing coil 170 by mutual induction.

The first coil 120 may move along with the bobbin 110 in the first direction by the electromagnetic force generated by the electromagnetic interaction between the current flowing through the first coil 120 by the driving signal and the magnet 130 .

As the first coil 120 moves in the first direction, the separation distance between the first coil 120 and the sensing coil 170 changes, and as the separation distance changes, an induced voltage may be generated in the sensing coil 170. there is. For example, as the separation distance decreases, the induced voltage generated in the sensing coil 170 may increase, and conversely, as the separation distance increases, the induced voltage generated in the sensing coil 170 may decrease.

Based on the voltage induced in the sensing coil 170, the displacement of the first coil 120 and the bobbin 110 may be detected, and based on the detected displacement, the displacement of the bobbin 110 or a driving signal is feedback controlled. It can be.

The sensing coil 170 may be disposed under the upper elastic member 150 disposed on the upper surface of the housing 140 and may be disposed above the magnet 130 disposed in the housing 140 .

At least a portion of the sensing coil 170 disposed on the housing 140 may overlap the protrusion 144 of the housing 140 in the first direction, but is not limited thereto, and in other embodiments, the sensing coil 170 may not overlap with the protrusion 144 of the housing 140 in the first direction.

Next, the support member 220 will be described.

There may be a plurality of support members 220 , and the plurality of support members 220 - 1 to 220 - 4 may be disposed to correspond to the second side parts 142 of the housing 140 . For example, each of the plurality of support members 220-1 to 220-4 may be disposed adjacent to a corresponding one of the four second side parts 142, and one end of the support member 220 is It may be bonded to the outer frame 152 of the upper elastic member 150 disposed on the corresponding second side. Alternatively, in another embodiment, the support member 220 may be disposed on the first side portion 141 of the housing 140 in the form of a leaf spring.

The plurality of support members 220-1 to 220-4 may form a path for transmitting a driving signal from the circuit board 250 to the first coil 120, and may form an induced voltage output from the sensing coil 170. A path may be formed to transfer the to the circuit board 250 .

The plurality of support members 220-1 to 220-4 may be implemented as members that can be supported by elasticity, such as leaf springs, coil springs, and suspension wires. Also, in another embodiment, the support member 220 may be integrally formed with the upper elastic member.

The plurality of support members 220-1 to 220-4 may be spaced apart from the housing 140, and are not fixed to the housing 140, but are connected to the outer frame 153 of the upper elastic member 150 ( 530) can be directly connected.

Since the connecting portion 530 of the outer frame 153 of the upper elastic member 150 is spaced apart from the housing 140, it can be easily moved in the first direction.

Since the support members 220-1 to 220-4 according to the embodiment are directly connected to the connection part 530 that can be easily moved in the first direction, compared to a general support member fixed to the housing 140, the first direction, and thus the accuracy of hand shake correction can be improved. In particular, stress may be dispersed in response to a drop or impact, and thus, deformation and disconnection of the support members 220-1 to 220-4 may be suppressed.

The first to fourth upper elastic members 150-1 to 150-4 may be electrically connected to the circuit board 250 through the support members 220-1 to 220-4.

For example, both ends of the first coil 120 may be connected to the inner frame 151 of the first and second upper elastic members 150-1 and 150-2, and the first and second upper elastic members 150-1 and 150-2 may be connected to each other. 1 to 150-2) and support members 220-2 to 220-3 may be electrically connected to the circuit board 250.

Also, for example, both ends of the sensing coil 170 may be connected to the inner frame 151 of the third and fourth upper elastic members 150-3 and 150-4, and the third and fourth upper elastic members 150-3 and 150-4 may be connected to each other. 3 to 150-4) and support members 220-1 to 220-4 may be electrically connected to the circuit board 250.

Support members 220-1 to 220-4 may be positioned inside the ring-shaped sensing coil 170.

Next, the base 210, the circuit board 250, and the second coil 230 will be described.

The base 210 may have a hollow corresponding to the hollow of the bobbin 110 and/or the hollow of the housing 140, and may have a shape matching or corresponding to the cover member 300, for example, a rectangular shape. .

FIG. 7 is an exploded perspective view of the base 210, the second coil 230, and the circuit board 250 shown in FIG. 1 .

Referring to FIG. 7 , the base 210 may include a step 211 to which an adhesive may be applied when the cover member 300 is adhesively fixed. At this time, the step 211 may guide the cover member 300 coupled to the upper side, and an end of the cover member 300 may be coupled to surface contact.

A support portion 255 having a corresponding size may be formed on a surface of the base 210 facing the portion of the circuit board 250 where the terminal 251 is formed. The supporting portion 255 of the base 210 is formed in a predetermined cross-section from the outer surface of the base 210 without the step 211 to support the terminal surface 253 of the circuit board 250 .

A corner of the base 210 may have a groove 212 . When the edge of the cover member 300 has a protruding shape, the protruding portion of the cover member 300 may be engaged with the base 210 at the groove 212 .

In addition, seating grooves 215-1 and 215-2 in which the OIS position sensor 240 can be disposed may be provided on the upper surface of the base 210. According to the embodiment, the base 210 may be provided with two seating grooves 215-1 and 215-2, and the OIS position sensor 240 may be provided with the seating grooves 215-1 and 215-2 of the base 210. 215-2), it is possible to detect the degree of movement of the housing 140 in the second and third directions. To this end, imaginary lines connecting the centers of the seating grooves 215-1 and 215-2 of the base 210 and the center of the base 210 may cross each other, for example, the seating of the base 210. An angle formed by imaginary lines connecting the centers of the grooves 215-1 and 215-2 and the center of the base 210 may be 90°, but is not limited thereto.

Based on the circuit board 250, the second coil 230 may be disposed on the upper side and the OIS position sensor 240 may be disposed on the lower side.

The OIS position sensor 240 may detect displacement of the housing 140 relative to the base 210 in a direction perpendicular to the optical axis OA (eg, the Z axis) (eg, the X axis or the Y axis). For example, the OIS position sensor 240 may detect a change in magnetic force of the magnet 130 according to the movement of the housing 140 and output a signal according to the detected result.

The OIS position sensor 240 includes a first OIS position sensor 240a and a second OIS position sensor 240b disposed to be orthogonal to each other in order to detect the displacement of the housing 140 in a direction perpendicular to the optical axis OA. can include

The circuit board 250 may be disposed on the upper surface of the base 210 and may have a hollow corresponding to the hollow of the bobbin 110, the hollow of the housing 140, or/and the hollow of the base 210. can The shape of the outer circumferential surface of the circuit board 250 may coincide with or correspond to the upper surface of the base 210 , for example, a rectangular shape.

The circuit board 250 may be bent from an upper surface and may include a plurality of terminals 251 receiving electrical signals from the outside or at least one terminal surface 253 on which pins are formed. .

7, the second coil 230 is implemented in a form provided on the circuit board 250 and a separate circuit member 231, but is not limited thereto, and in other embodiments, the second coil 230 has a ring shape. It may be implemented in the form of a coil block of , implemented in the form of an FP coil, or implemented in the form of a circuit pattern formed on the circuit board 250 .

A through hole 230a passing through the circuit member 231 in which the second coil 230 is formed may be provided. The support member 220 may be electrically connected to the circuit board 250 through the through hole 230a.

The second coil 230 is disposed above the circuit board 250 to face the magnet 130 disposed on the housing 140 .

A total of four second coils 230 may be installed on the four sides of the circuit board 250, but this is not limited, and it is also possible that only two coils, such as one for the second direction and one for the third direction, are installed. It is possible, and 4 or more may be installed.

Hand shake correction may be performed by moving the housing 140 in the second and/or third directions due to interaction between the magnets 130 and the second coil 230 disposed to face each other.

The OIS position sensors 240a and 240b may be provided as Hall sensors, and any sensors capable of detecting magnetic field strength may be used. For example, the OIS position sensors 240a and 240b may be implemented in the form of a driver including a Hall sensor or implemented as a single position detection sensor such as a Hall sensor.

The OIS position sensors 240a and 240b may detect displacement of the housing 140, and an OIS feedback operation may be performed using the detected displacement.

A plurality of terminals 251 may be installed on the terminal surface 253 of the circuit board 250 .

For example, external power is applied through a plurality of terminals 251 installed on the terminal surface 253 of the circuit board 250 to supply power to the first and second coils 120 and 230 and the OIS position sensor 240. It may be supplied, the induced voltage output from the sensing coil 170 may be provided and output to the outside, or the output signal output from the OIS position sensor 240 may be provided and output to the outside.

According to the embodiment, the circuit board 250 may be provided with FPCB, but is not limited thereto, and terminals of the circuit board 250 may be directly formed on the surface of the base 210 using a surface electrode method or the like. do.

The circuit board 250 may include through holes 250a1 and 250a2 through which the support member 220 may pass. The support member 220 may be electrically connected to a corresponding circuit pattern disposed on the bottom surface of the circuit board 250 through through-holes 250a1 and 250a2 of the circuit board 250 through soldering or the like.

Also, in another embodiment, the circuit board 250 may not have the through holes 250a1 and 250a2, and the support member 220 is electrically connected to a circuit pattern or pad formed on the upper surface of the circuit board 250 by soldering or the like. may be connected to

The circuit board 250 may further include a through hole 250b coupled to the upper support protrusion 217 of the base 210 .

FIG. 8 is a side perspective view of the lens driving device shown in FIG. 2, FIG. 9 is a cross-sectional view taken along line I-I' of the lens driving device shown in FIG. 2, and FIG. 10 is a lens driving device shown in FIG. 2. Shows the cut cross-sectional view of II-II' of

Referring to FIGS. 8 to 10 , the sensing coil 170 is directly wound in the sensing coil seating groove 141b provided on the first and second side surfaces 141 and 142 of the housing 140 .

In the initial position, the sensing coil 170 may not overlap the magnet 130 in a direction perpendicular to the first direction. This is to reduce mutual interference between the magnet 130 and the sensing coil 170 .

The initial position is the initial position of the AF movable part in a state in which power is not applied to the first coil 120, or a position where the AF movable part is placed as the upper and lower elastic members 150 and 160 are elastically deformed only by the weight of the AF movable part. can be The AF movable unit may include the bobbin 110 and components mounted on the bobbin 110 .

In addition, in the initial position, the sensing coil 170 may be spaced apart from the first coil 120 by a predetermined interval in the first direction, and may not overlap the first coil 120 in a direction perpendicular to the first direction. . Maintaining a predetermined distance between the first coil and the sensing coil 170 in the first direction is to secure the linearity of the induced voltage induced in the sensing coil 170 by the current of the first coil 120 .

At the initial position, the sensing coil 170 may overlap the magnet 130 in the first direction, but is not limited thereto, and in another embodiment, both may not overlap each other in the first direction.

The sensing coil 170 may be directly wound on the side of the housing 140 so that at least a portion thereof is positioned outside the support member 220 . For example, the outer side of the support member 220 may be opposite to the center of the hollow of the housing 140 based on the support member 220 .

The support member 220 may be positioned between the first coil 120 and the sensing coil 170 in a direction perpendicular to the optical axis OA.

The sensing coil 170 includes first parts 170 - 1 (see FIG. 8 ) disposed on outer surfaces of the first side parts 141 and second parts disposed on outer surfaces of the second side parts 142 . (170-2, see FIG. 8) may be included.

For example, each of the first parts 170-1 of the sensing coil 170 may have a straight shape, and each of the second parts 170-2 may have a curved shape.

The second parts 170 - 2 of the sensing coil 170 may be positioned outside the support member 220 . For example, each of the second parts 170-2 of the sensing coil 170 may be positioned outside a corresponding one of the support members 220-1 to 220-4.

The distance from the center of the housing 140 to each of the support members 220-1 to 220-4 is the distance from the center of the housing 140 to each of the second parts 170-2 of the sensing coil 170. less than the distance For example, the separation distance of any one support member (eg, 220-1) based on the center of the housing 140 is the second part of the sensing coil 170 corresponding to any one support member (eg, 220-1). It may be smaller than the separation distance of (170-2).

The sensing coil 170 does not overlap the frame connecting portion 153 of each of the first to fourth upper elastic members 150-1 to 150-4 in the first direction. For this reason, in the case of the same number of turns, the length of the sensing coil 170 can be increased.

At least a portion of the outer frame 152 of the upper elastic member 150 may be disposed in the second area S2 of the upper surface 401 of the housing 140 exposed by the protrusion 144 . Due to this, the sensing coil 170 may overlap the outer frame 152 of each of the first to fourth upper elastic members 150-1 to 150-4 in the first direction.

For example, at least a portion of the first coupling part 510 of the outer frame 152 of each of the first to fourth upper elastic members 150-1 to 150-4 overlaps the sensing coil 170 in the first direction. It can be.

For example, the portion 901 where the first coupling portion 510 of the first to fourth upper elastic members 150-1 to 150-4 and the frame connection portion 153 are connected is the sensing coil 170 in the first direction. ) and may overlap.

Since the outer frame 152 of the upper elastic member 150 may be disposed on the upper surface of the housing 140 to overlap the sensing coil 170 in the first direction, the upper elastic member 150 is attached to the housing 140. It is possible to improve the degree of freedom of the arrangement of the upper elastic member 150 without being subject to spatial restrictions.

Since the sensing coil 170 is directly wound on the side of the housing 140 so that the second part 170-2 of the sensing coil 170 is positioned outside the supporting members 220-1 to 220-4, In an embodiment, the sensing coil 170 may be wound on the top of the outer surface of the first and second side parts 141 and 142 of the housing 140, and the length of the sensing coil 170 wound once around the housing 140. can increase As the length of the sensing coil 170 wound once increases, the number of windings of the housing 140 to implement the sensing coil 170 having a predetermined resistance value may be reduced. Also, as the number of windings of the sensing coil 170 is reduced, the area of the housing 140 required for the sensing coil 170 can be reduced and the area for disposing the magnet 130 can be increased so as to be mounted on the housing 140. You can increase the size of the magnet that can do it.

For example, a resistance value of a sensing coil is affected by a temperature change, and sensing current may change due to a change in the resistance value of the sensing coil. Since the influence of the sensing current due to such a temperature change may cause malfunction of AF driving, temperature compensation is required. Such temperature compensation can be easily performed by setting the resistance of the sensing coil to be greater than or equal to a predetermined resistance value (eg, 30 Ω). The embodiment may implement a sufficient resistance value to facilitate temperature compensation with a small number of turns.

After all, by securing the space of the housing 140 in which the larger magnet 130 can be placed, the embodiment can increase the electromagnetic force due to interaction with the magnet 130.

FIG. 11 is a top view illustrating the arrangement of the sensing coil 170 shown in FIG. 8 .

Referring to FIG. 11 , since the sensing coil 170 is wound around the housing 140 such that the curved portion 302 of the sensing coil 170 is positioned outside the support member 220-1, the curved portion of the sensing coil 170 is positioned outside the supporting member 220-1. Compared to the case of being located inside the support member 220-1, the length of one turn of the sensing coil 170 can be improved.

As described above, in the embodiment, since the sensing coil 170 is directly wound on the outer surfaces of the first and second side parts 141 and 142 of the housing 140, the sensing coil 170 and the housing 140 or the sensing coil Deterioration in bonding reliability between the 170 and the upper elastic member 150 can be prevented.

In addition, since the sensing coil 170 is disposed below the upper elastic member 150 and spaced apart from the upper elastic member 150, the embodiment has a spatial restriction in installing the upper elastic member 150 on the top of the housing 140. do not receive

In addition, since the sensing coil 170 is disposed outside the support member 220, the length of the outermost circumference of the sensing coil 170 can be maximally increased, and the sensing coil 170 having a predetermined resistance with a small winding can be realized, and the electromagnetic force for AF or OIS driving can be increased by increasing the size of the magnet 130 that can be disposed on the housing 140.

FIG. 12 shows a top view of the dotted line part 11 of FIG. 8, and FIG. 13 shows a side perspective view of the dotted line part 11 of FIG.

In order to secure the linearity of the induced voltage induced in the sensing coil 170 by the current of the first coil 120, the separation distance between the first coil 120 and the sensing coil 170 in the first direction is equal to or greater than a predetermined distance. You must secure enough.

The sensing coil 170 according to the embodiment is disposed on the upper end of the side parts 141 and 142 of the housing 140 adjacent to the upper surface 401 of the housing 140, thereby sensing the first coil 120 in the first direction. A separation distance between the coils 170 may be secured by a predetermined distance or more.

When the sensing coil 170 is disposed on top of the side parts 141 and 142 of the housing 140, the sensing coil 170 may be separated from the housing 140 in an upward direction. The protrusion 144 of the housing 140 of the embodiment may serve to prevent the sensing coil 170 disposed at the upper end of the side of the housing 140 from escaping in an upward direction.

However, unlike the embodiment, when the protrusion 144 of the housing 140 is disposed on the entire edge of the upper surface of the housing 140 corresponding to or aligned with the sensing coil 140 disposed on the housing 140, the housing The space in which the upper elastic member 150 disposed on the upper surface of 140 is installed may be limited. Therefore, in the embodiment, the second area S2 of the upper surface 401 of the housing 140 is exposed by the protrusion 144, and the second area S2 of the upper surface 401 of the housing 140 is exposed. By disposing the outer frame 152 of the upper elastic member 150, it is possible to prevent a spatial restriction in installation of the upper elastic member 150.

However, in order to prevent interference or contact between the upper elastic member 150 and the sensing coil 170, a portion 501 of the side of the housing 140 may be disposed between the upper elastic member 150 and the sensing coil 170. there is.

In this case, the distance d1 between the lower surface of the upper elastic member 150 and the upper surface of the sensing coil 170 may be 0.05 mm to 1 mm. When d1 is less than 0.05 mm, interference or contact between the upper elastic member 150 and the sensing coil 170 may occur. For example, the distance d1 between the lower surface of the upper elastic member 150 and the upper surface of the sensing coil 170 may range from 0.05 mm to 0.1 mm. When d1 exceeds 1 mm, the linearity of the induced voltage of the sensing coil 170 may not be secured because a separation distance between the first coil 120 and the sensing coil 170 may not be sufficiently secured in the first direction.

14 shows an exploded perspective view of the camera module 200 according to the embodiment.

Referring to FIG. 14 , the camera module includes a lens barrel 400, a lens driving device 100, an adhesive member 710, a filter 610, a first holder 600, a second holder 800, an image sensor ( 810), a motion sensor 820, a controller 830, and a connector 840.

A lens barrel 400 may be mounted on the bobbin 110 of the lens driving device 100 .

The first holder 600 may be disposed under the base 210 of the lens driving device 100 . The filter 610 is mounted on the first holder 600, and the first holder 600 may have a protrusion 500 on which the filter 610 is seated.

The adhesive member 710 may couple or attach the base 210 of the lens driving device 100 to the first holder 600 . The adhesive member 710 may serve to prevent foreign matter from entering the lens driving device 100 in addition to the above-described adhesive function.

For example, the adhesive member 710 may be an epoxy, a thermosetting adhesive, or an ultraviolet curable adhesive.

The filter 610 may serve to block light of a specific frequency band from light passing through the lens barrel 400 from being incident to the image sensor 810 . The filter 610 may be an infrared cut filter, but is not limited thereto. In this case, the filter 610 may be disposed parallel to the x-y plane.

A hollow may be formed in a portion of the first holder 600 where the filter 610 is mounted so that light passing through the filter 610 may be incident to the image sensor 810 .

The second holder 800 may be disposed below the first holder 600 , and the image sensor 810 may be mounted on the second holder 600 . The image sensor 810 is a part where light passing through the filter 610 is incident and an image including the light is formed.

The second holder 800 may be equipped with various circuits, elements, controllers, etc. to convert an image formed on the image sensor 810 into an electrical signal and transmit it to an external device.

The second holder 800 may be implemented as a circuit board on which an image sensor may be mounted, a circuit pattern may be formed, and various elements may be coupled.

The image sensor 810 may receive an image included in light incident through the lens driving device 100 and convert the received image into an electrical signal.

The filter 610 and the image sensor 810 may be spaced apart from each other so as to face each other in the first direction.

The motion sensor 820 is mounted on the second holder 800 and may be electrically connected to the controller 830 through a circuit pattern provided on the second holder 800 .

The motion sensor 820 outputs rotational angular velocity information caused by the movement of the camera module 200 . The motion sensor 820 may be implemented as a 2-axis or 3-axis gyro sensor or an angular velocity sensor.

The controller 820 may be mounted on the second holder 800 and electrically connected to the second position sensor 240 and the second coil 230 of the lens driving device 100 . For example, the second holder 800 may be electrically connected to the circuit board 250 of the lens driving device 100, and the controller 820 mounted on the second holder 800 is controlled through the circuit board 250. It may be electrically connected to the 2 position sensor 240 and the second coil 230 .

The control unit 830 generates a driving signal capable of performing hand shake correction on the OIS movable unit of the lens driving apparatus 100 based on feedback signals provided from the second position sensor 240 of the lens driving apparatus 100. can be printed out.

The connector 840 is electrically connected to the second holder 800 and may include a port to be electrically connected to an external device.

In addition, the lens driving device 100 according to the embodiment forms an image of an object in space using reflection, refraction, absorption, interference, diffraction, etc., which are characteristics of light, and aims to increase the visual acuity of the eye, or It may be included in an optical instrument for the purpose of recording and reproducing images by means of optical measurement, propagation or transmission of images, etc. For example, an optical device according to an embodiment may include a smart phone and a portable terminal equipped with a camera.

15 is a perspective view of a portable terminal 200A according to an embodiment, and FIG. 16 is a configuration diagram of the portable terminal shown in FIG. 15 .

15 and 16, a portable terminal (200A, hereinafter referred to as a “terminal”) includes a body 850, a wireless communication unit 710, an A/V input unit 720, a sensing unit 740, an input/output unit, It may include an output unit 750, a memory unit 760, an interface unit 770, a control unit 780, and a power supply unit 790.

The body 850 shown in FIG. 15 has a bar shape, but is not limited thereto, and is a slide type, folder type, or swing type in which two or more sub-bodies are coupled to be relatively movable. , and may have various structures such as a swivel type.

The body 850 may include a case (casing, housing, cover, etc.) constituting an external appearance. For example, the body 850 may be divided into a front case 851 and a rear case 852 . Various electronic components of the terminal may be embedded in the space formed between the front case 851 and the rear case 852 .

The wireless communication unit 710 may include one or more modules enabling wireless communication between the terminal 200A and a wireless communication system or between the terminal 200A and a network in which the terminal 200A is located. For example, the wireless communication unit 710 may include a broadcast reception module 711, a mobile communication module 712, a wireless Internet module 713, a short-distance communication module 714, and a location information module 715. there is.

An audio/video (A/V) input unit 720 is for inputting an audio signal or a video signal, and may include a camera 721 and a microphone 722.

The camera 721 may be the camera 200 including the lens driving device 100 according to the embodiment shown in FIG. 14 .

The sensing unit 740 detects the current state of the terminal 200A, such as the open/closed state of the terminal 200A, the location of the terminal 200A, whether or not there is a user contact, the direction of the terminal 200A, and the acceleration/deceleration of the terminal 200A. By sensing, a sensing signal for controlling the operation of the terminal 200A may be generated. For example, when the terminal 200A is in the form of a slide phone, whether the slide phone is opened or closed may be sensed. In addition, it is responsible for sensing functions related to whether or not the power supply unit 790 supplies power and whether or not the interface unit 770 is connected to an external device.

The input/output unit 750 is for generating input or output related to sight, hearing, or touch. The input/output unit 750 may generate input data for controlling the operation of the terminal 200A, and may also display information processed by the terminal 200A.

The input/output unit 750 may include a keypad unit 730, a display module 751, a sound output module 752, and a touch screen panel 753. The keypad unit 730 may generate input data by keypad input.

The display module 751 may include a plurality of pixels whose colors change according to electrical signals. For example, the display module 751 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, a 3D At least one of 3D displays may be included.

The audio output module 752 outputs audio data received from the wireless communication unit 710 in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, or a broadcast reception mode, or stored in the memory unit 760. Audio data can be output.

The touch screen panel 753 may convert a change in capacitance caused by a user's touch to a specific area of the touch screen into an electrical input signal.

The memory unit 760 may store programs for processing and control of the control unit 780, and may store input/output data (eg, phone book, messages, audio, still images, photos, videos, etc.) can be temporarily stored. For example, the memory unit 760 may store an image captured by the camera 721, for example, a photo or video.

The interface unit 770 serves as a passage through which an external device connected to the terminal 200A is connected. The interface unit 770 receives data from an external device or receives power and transmits it to each component inside the terminal 200A, or transmits data inside the terminal 200A to an external device. For example, the interface unit 770 may include a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port connecting a device having an identification module, an audio I/O (Input/ Output) port, video I/O (Input/Output) port, and earphone port.

The controller 780 may control overall operations of the terminal 200A. For example, the controller 780 may perform related control and processing for voice calls, data communications, video calls, and the like. The controller 780 may include the panel controller 144 of the touch screen panel driving unit shown in FIG. 1 or may perform the function of the panel controller 144 .

The controller 780 may include a multimedia module 781 for playing multimedia. The multimedia module 781 may be implemented within the control unit 180 or may be implemented separately from the control unit 780.

The controller 780 may perform a pattern recognition process capable of recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 790 may receive external power or internal power under the control of the control unit 780 to supply power necessary for the operation of each component.

Features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified with respect to other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to these combinations and variations should be construed as being included in the scope of the present invention.

110: bobbin 120: first coil
130: magnet 140: housing
150: upper elastic member 160: lower elastic member
170: sensing coil 210: base
220: support member 230: second coil
240: second position sensor 250: circuit board 300: cover member.

Claims (26)

A housing including a plurality of protrusions provided on an upper surface;
a bobbin disposed within the housing;
a magnet disposed on a side of the housing;
a first coil disposed on the bobbin and moving the bobbin by interaction with the magnet;
an upper elastic member coupled to the bobbin and the housing; and
A sensing coil disposed on the side of the housing between the protrusions and the magnet and generating an induced voltage by interaction with the first coil,
At least a portion of the upper elastic member is disposed on the upper surface of the housing between the protrusions,
The upper elastic member includes an inner frame coupled to the bobbin, an outer frame coupled to the upper surface of the housing, and a frame connecting portion connecting the inner frame and the outer frame,
The sensing coil overlaps the outer frame in the optical axis direction. The method of claim 1, wherein the side of the housing,
first side parts on which the magnet is disposed; and
And second side parts connecting two adjacent first side parts among the first side parts to each other,
The sensing coil is disposed on outer surfaces of the first and second side parts to be wound in a clockwise or counterclockwise direction with respect to an optical axis. The method of claim 2, wherein the plurality of protrusions,
a first protrusion provided on an upper surface of at least one of the first side parts; and
And a second protrusion provided on an upper surface of at least one of the second side parts,
At least a portion of the upper elastic member is disposed on the upper surface of the housing between the first protrusion and the second protrusion. According to claim 1,
The lens driving device of claim 1, wherein the sensing coil does not overlap with the frame connecting portion in the optical axis direction. According to claim 1,
A connection portion between the outer frame and the frame connecting portion overlaps the sensing coil in the optical axis direction. According to claim 2,
Seating grooves are formed on outer surfaces of the first and second side parts of the housing,
The sensing coil is a lens driving device disposed in the seating groove. According to claim 1,
The sensing coil is disposed on an upper end of an outer surface of the side portion of the housing to be spaced apart from the upper elastic member disposed on the upper surface of the housing. According to claim 1,
The plurality of protrusions are disposed in a first region of the upper surface of the housing,
At least a portion of the upper elastic member is disposed in a second area of the upper surface of the housing located between the plurality of protrusions,
The second area is open to an outer surface of the side portion of the housing. According to claim 8,
The sensing coil overlaps with each other in the optical axis direction with the plurality of protrusions. According to claim 3,
The first protrusion is arranged to be aligned with the center of the upper surface of at least one of the first side parts,
The second protrusion is arranged to be aligned with the center of the upper surface of at least one of the second side parts. According to claim 3,
The lens driving device of claim 1 , wherein the first protrusion has a straight shape and the second protrusion has a curved shape. According to claim 1,
Further comprising a support member connected to the outer frame of the upper elastic member,
The support member is a lens driving device located inside the sensing coil. housing;
a magnet disposed in the housing;
a bobbin disposed within the housing;
a first coil disposed on the bobbin;
an upper elastic member coupled to the bobbin and the housing; and
A sensing coil disposed on a side of the housing and generating an induced voltage by interacting with the first coil;
The upper elastic member includes an inner frame coupled to the bobbin, an outer frame coupled to the upper surface of the housing, and a frame connecting portion connecting the inner frame and the outer frame,
At least one concave portion is provided on the upper surface of the housing,
At least a portion of the upper elastic member is disposed in the at least one concave portion of the housing, and the sensing coil overlaps the outer frame in an optical axis direction. According to claim 13,
The at least one concave portion is open to an outer surface of the side portion of the housing, and the at least part of the upper elastic member is exposed to an outer surface of the side portion of the housing. According to claim 13,
At least a portion of the outer frame is disposed in the at least one concave portion. According to claim 13,
The sensing coil is disposed spaced apart from the outer frame lens driving device. According to claim 13,
The at least one concave portion is provided on the side of the housing where the magnet is disposed. According to claim 13,
The at least one concave portion is provided adjacent to at least one side of the upper surface of the housing. According to claim 13,
The at least one concave portion includes a bottom and a side surface,
The sensing coil is disposed under the bottom of the at least one concave portion, and the at least part of the upper elastic member is disposed to contact the bottom of the at least one concave portion. According to claim 13,
The lens driving device of claim 1, wherein the sensing coil does not overlap with the frame connecting portion in the optical axis direction. According to claim 13,
A connection portion between the outer frame and the frame connecting portion overlaps the sensing coil in the optical axis direction. According to claim 19,
the housing,
and an upper support protrusion disposed on the bottom of the at least one concave portion and engaged with at least a portion of the upper elastic member. a housing including a plurality of side parts;
magnets disposed on a plurality of sides of the housing;
a bobbin disposed within the housing;
a first coil disposed on the bobbin and moving the bobbin by interaction with the magnet;
an upper elastic member coupled to the bobbin and the housing;
sensing coils disposed on the plurality of side parts of the housing and generating an induced voltage by interacting with the first coil; and
A second coil disposed facing the magnet and moving the housing by interaction with the magnet,
An upper surface of the plurality of side parts of the housing includes a first area and a second area, at least a part of the upper elastic member is disposed in the second area, and the first area is based on the second area. It is a protruding structure, and the second area is a structure that is depressed based on the first area,
The upper elastic member includes an inner frame coupled to the bobbin, an outer frame coupled to the upper surface of the housing, and a frame connecting portion connecting the inner frame and the outer frame, and the sensing coil is directed toward the optical axis. A lens drive unit overlapping the outer frame. According to claim 23,
The second area is open to outer and inner surfaces of the side portions of the housing, respectively. lens barrel;
a lens driving device according to any one of claims 1 to 24 for moving the lens barrel; and
A camera module including an image sensor that converts an image incident through the lens driving device into an electrical signal. a display module including a plurality of pixels whose colors change according to electrical signals;
A camera module according to claim 25 for converting an image incident through a lens into an electrical signal; and
An optical device comprising a control unit controlling operations of the display module and the camera module.

Images