KR102634909B1 - A lens moving unit, and camera module and optical instrument including the same - Google Patents

Abstract

The embodiment includes a housing that supports a magnet, a first coil disposed on the outer peripheral surface, a bobbin that moves by interaction between the magnet and the first coil, an upper elastic member coupled to the bobbin and the housing, and one end of the upper side. It includes a support member connected to an elastic member, and a sensing coil that generates an induced voltage by interacting with the first coil, wherein the sensing coil is spaced apart from the magnet and at least a portion is located outside the support member. It is wound on the side of the housing so that the outside of the support member is opposite to the center of the housing with respect to the support member.

Description

Lens driving device, and camera module and optical device including the same {A LENS MOVING UNIT, AND CAMERA MODULE AND OPTICAL INSTRUMENT INCLUDING THE SAME}

Embodiments relate to a lens driving device and a camera module and optical device including the same.

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

Demand and production of electronic products such as smartphones and cell phones equipped with cameras are increasing. Cameras for mobile phones are trending towards higher resolution and miniaturization, and actuators are also becoming smaller, larger in diameter, and multi-functional accordingly. In order to implement a high-resolution mobile phone camera, additional functions such as improved mobile phone camera performance and auto focusing, improved shutter shake, and zoom function are required. For information related to the camera module, please refer to Patent Publication No. 10-2015-0008662 (publication date: January 23, 2015).

The embodiment provides a lens driving device that can implement a sensing coil with a preset resistance with a small number of windings and improve electromagnetic force by interaction with a magnet, and a camera module and optical device including the same.

A lens driving device according to an embodiment includes a housing supporting a magnet; A bobbin with a first coil disposed on the outer peripheral surface and moving by interaction between the magnet and the first coil; an upper elastic member coupled to the bobbin and the housing; a support member whose end is connected to the upper elastic member; and a sensing coil that generates an induced voltage by interacting with the first coil, wherein the sensing coil is spaced apart from the magnet and is wound on a side of the housing so that at least a portion is located outside the support member. , the outside of the support member is opposite to the center of the housing with respect to the support member.

The housing includes first sides where the magnet is disposed; and second sides on which the support member is disposed and connecting two adjacent first sides among the first sides.

The sensing coil includes first parts disposed on outer surfaces of the first sides; and a second part disposed on outer surfaces of the second sides, and the second part may be curved.

The sensing coil may be disposed on top of the outer surfaces of the first and second sides.

Each of the second parts of the sensing coil may be located outside the support member.

A seating groove is formed on the outer surfaces of the first and second sides of the housing, and the sensing coil may be wound around the seating groove.

The separation distance from the center of the housing to the support member may be smaller than the separation distance from the center of the housing to the second portion of the sensing coil.

The upper elastic member includes a plurality of divided upper elastic members, and each of the plurality of divided upper elastic members includes an inner frame coupled to the bobbin; an outer frame coupled to the housing; and a frame connector connecting the inner frame and the outer frame, wherein the sensing coil may not overlap the frame connector in a direction parallel to the optical axis.

The sensing coil may be located below the upper elastic member and above the magnet.

In the initial position, the sensing coil may not overlap the first coil in a direction perpendicular to the optical axis.

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

The housing has a through hole through which the support member passes in the second sides, and the seating groove includes a first groove provided in the first sides and a second groove provided in the second sides. The first distance is greater than the second distance, the first distance is the separation distance between the second groove and an imaginary straight line passing through the center of the housing and parallel to the optical axis, and the second distance is the distance between the imaginary straight line and the through hole. It may be the distance between the two.

A camera module according to an embodiment includes a lens barrel; A lens driving device according to an embodiment that moves 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 colors change by electrical signals; A camera module according to an embodiment that converts an image incident through a lens into an electrical signal; and a control unit that controls operations of the display module and the camera module.

In the embodiment, a sensing coil with a preset resistance can be implemented with a small number of windings, and electromagnetic force can be improved by interaction with a magnet.

Figure 1 shows an exploded perspective view of the lens driving device shown in Figure 1.
FIG. 2 shows 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 2.
FIG. 4 shows a first exploded perspective view of the housing and magnet shown in FIG. 1.
Figure 5 shows a second exploded perspective view of the housing and magnet shown in Figure 1.
FIG. 6 shows a perspective view of the upper elastic member, lower elastic member, base, support member, and circuit board shown in FIG. 1 combined.
FIG. 7 shows an exploded perspective view of the base, second coil, and circuit board shown in FIG. 1.
FIG. 8 shows a side perspective view of the lens driving device shown in FIG. 2.
FIG. 9A shows a cross-sectional view taken along line I-I' of the lens driving device shown in FIG. 2.
FIG. 9B shows a cross-sectional view taken along line II-II' of the lens driving device shown in FIG. 2.
Figure 10 shows a partial cross-sectional view taken along line II-II' to explain the relative position between the sensing coil and the support member according to the embodiment.
Figure 11 shows a partial cross-sectional view taken along line I-I' to explain the relative position between the sensing coil and the support member according to the embodiment.
FIG. 12 is a top view showing the arrangement of the sensing coil shown in (a) of FIG. 10.
FIG. 13 is a top view showing the arrangement of the sensing coil shown in FIG. 10(b).
Figure 14 shows an exploded perspective view of the camera module 200 according to an embodiment.
Figure 15 shows 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 descriptions 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, “on” and “under” include both being formed “directly” or “indirectly through another layer.” do. Additionally, the standards for top/top or bottom/bottom of each floor are explained based on the drawing. Additionally, the same reference numbers indicate the same elements throughout the description of the drawings.

Hereinafter, a lens driving device according to an embodiment will be described as follows with reference to the attached drawings. For convenience of explanation, the lens driving device according to the embodiment is described using a Cartesian coordinate system (x, y, z), but it can also be described using another coordinate system, and the embodiment is not limited thereto. In each drawing, the x-axis and y-axis refer to directions perpendicular to the z-axis, which is the optical axis direction. The z-axis direction, which is the optical axis direction, is called the 'first direction', the x-axis direction is called the 'second direction', and the y The axial direction may be referred to as the 'third direction'.

An 'image stabilization device' applied to small camera modules of mobile devices such as smartphones or tablet PCs is a device that prevents the outline of the captured image from being clearly formed due to vibration caused by the user's hand shaking when shooting still images. It may refer to a device configured to do so.

Additionally, an 'autofocusing device' is a device that automatically focuses an image of a subject onto the image sensor surface. Such image stabilization devices and auto-focusing devices can be configured in various ways. The lens driving device according to the embodiment moves an optical module composed of at least one lens in a first direction, or moves an optical module composed of at least one lens in a first direction, or moves a second optical module perpendicular to the first direction. And, by moving on a surface formed in a third direction, an image stabilization operation and/or an auto-focusing operation may be performed.

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

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

Additionally, the lens driving device 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. Additionally, 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 a receiving space formed together with the base 210. It accommodates member 160, sensing coil 170, support member 220, second coil 230, OIS position sensor 240, and circuit board 250.

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

The cover member 300 may have a hollow portion at the upper end that exposes a lens (not shown) coupled to the bobbin 110 to external light. Additionally, in order to prevent foreign substances such as dust or moisture from penetrating into the camera module, a window made of a light-transmissive material may be additionally provided in the hollow of the cover member 300.

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

Next, the bobbin 110 will be described.

Figure 3 shows a perspective view of the bobbin 110 shown in Figure 2.

Referring to FIG. 3, the bobbin 110 is located inside the housing 140 and can be moved in a first direction (e.g., Z-axis 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 hole for mounting a lens or lens barrel. The hollow shape of the bobbin 110 may match the shape of the lens or lens barrel on which it is mounted, and may be, for example, circular, oval, or polygonal, but is not limited thereto.

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

The bobbin 110 may be provided with an upper escape groove 112 provided in an area of the upper surface corresponding to or aligned with the frame connection portion 153 of the upper elastic member 150. Additionally, the bobbin 110 may be provided with a lower escape groove (not shown) in an area of the lower surface that corresponds to or is aligned with the connection portion 163 of the lower elastic member 150. Additionally, in another embodiment, the connection portion of the upper elastic member and the bobbin may be designed so as 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 the outer peripheral surface. The first coil 120 may be placed or seated in the groove, or may be directly wound around the groove to rotate clockwise or counterclockwise with respect to the optical axis. The shape and number of grooves may correspond to the shape and number of coils disposed on the outer peripheral surface of the bobbin 110. In another embodiment, the bobbin 110 may not be provided with a seating groove for the coil, and the first coil 120 may be wound and fixed directly on the outer peripheral surface of the bobbin 110.

Next, the first coil 120 will be described.

The first coil 120 is disposed on the outer peripheral surface of the bobbin 110 and may be a driving coil that electromagnetically interacts with the magnet 130 disposed in the housing 140. A driving signal (eg, 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.

The AF (Auto Focus) movable unit may move in the first direction by electromagnetic force resulting from the interaction between the first coil 120 and the magnet 130. By controlling the electromagnetic force by controlling the driving signal applied to the first coil 120, the movement of the AF movable unit in the first direction can be controlled, and thus the auto-focusing function can be performed.

The AF movable unit may include a 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 movable unit may include a bobbin 110, a first coil 120, and a lens (not shown) mounted on the bobbin 110.

The first coil 120 may be wound to surround the outer peripheral surface of the bobbin 110 to rotate clockwise or counterclockwise about the optical axis. In another embodiment, the first coil 120 may be implemented in the form of a coil ring wound clockwise or counterclockwise about an axis perpendicular to the optical axis, and the number of coil rings may be the same as the number of magnets 130. However, it is not limited to this.

The first coil 120 may be electrically connected to at least one of the upper elastic member 150 or 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 the bobbin 110 can move in the first direction by electromagnetic force generated by the interaction between the first coil 120 and the magnet 130. The bobbin 110 can be accommodated on the inside.

FIG. 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. 1.

Referring to FIGS. 4 and 5 , the housing 140 may have an overall hollow pillar shape. For example, the housing 140 may have a polygonal (eg, square or octagonal) or circular hollow shape.

Housing 140 may include a plurality of side portions 141 and 142. 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 width of each of the first sides 141 of the housing 140 may be greater than the width of each of the second sides 142.

A magnet 130 may be placed or installed on the first sides 141 of the housing 140.

Each of the second sides 142 of the housing 140 may be located between two adjacent first sides, and the first sides 141 may be connected to each other. A support member 220 may be disposed on the second sides 142 of the housing 140. For example, the support member 220 may pass through the through hole 147 provided in the second sides 142 and be coupled to the outer frame 152 of the upper elastic member 150.

The first sides 141 of the housing 140 connect the second sides 142 of the housing 140 to each other and may include a plane of a certain depth. Each of the first sides 141 of the housing 140 may have an area equal to or larger than the area of the corresponding magnet 130.

The housing 140 may be provided with 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 seating portion 141a may be provided at the inner bottom of at least one of the first sides 141 of the housing 140. For example, the magnet seating portion 141a may be provided at the inner bottom of each of the four first sides, and each of the magnets 130 may be inserted into and fixed to a corresponding one of the magnet seating portions 141a. .

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

The seating groove 141b for the sensing coil of the housing 140 may be formed in a recessed form from the outer side of at least one of the first sides 141 or the second sides 142 of the housing 140, Each of the first sides 141 and/or the second sides 142 may be formed from one end to the other end. For example, the seating groove 141b for the sensing coil of the housing 140 may be formed at the top of the outer surface of the first and second sides 141 and 142.

The depth of the seating groove 141b for the sensing coil may be greater than or equal to the thickness of the coiled sensing coil 170.

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

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

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

Additionally, in order to prevent direct collision with the inner surface of the cover member 300 shown in FIG. 1, a stopper 144 may be provided at the top or upper surface of the housing 140.

For example, the stopper 144 includes first stoppers 144a1 to 144a4 disposed on the top or upper surface of the first sides 141 of the housing 140, and first stoppers 144a1 to 144a4 disposed on the upper or upper surface of the second sides 142 of the housing 140. It may include two stoppers (144b1 to 144b4).

The first stoppers 144a1 to 144a4 may be arranged to be spaced apart from each other, and the second stoppers 144b1 to 144b4 may be arranged to be spaced apart from each other. Additionally, the first stoppers 144a1 to 144a4 and the second stoppers 144b1 to 144b4 may be arranged to be spaced apart from each other.

For example, the upper end of the seating groove 141b for the sensing coil may contact the lower ends of the first stoppers 144a1 to 144a4 and the second stoppers 144b1 to 144b4.

The seating groove 141b for the sensing coil may include a first groove 144-1 provided on the first sides 141 and a second groove 144-2 provided on the second sides 142. You can.

The second groove 144-2 of the sensing coil seating groove 141b may be located outside the through hole 147 through which the support member 220 passes.

For example, the second groove 144-2 of the seating groove 141b for the sensing coil may be located further than the through hole 147 based on an imaginary straight line that passes through the center of the hollow of the housing 140 and is parallel to the optical axis. .

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

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 top or upper surface.

The upper support protrusion 143 of the housing 140 may be formed on the upper surface of at least one of the first sides 141 or the second sides 142 of the housing 140. For example, the upper support protrusion 143 may be disposed at the top or upper surface of the first sides 141 between the first stoppers 144a1 to 144a4 and the second stoppers 144b1 to 144b4.

Additionally, the housing 140 may be provided on its lower surface with a lower support protrusion 145 that is coupled to and fixed to the outer frame 162 of the lower elastic member 160.

The housing 140 has a groove formed in the second side 142 not only to form a path through which the support member 220 passes, but also to secure a space for filling the gel-type silicone that can play a damping role. 142a) can be provided. That is, the groove 142a of the housing 140 may be filled with damping silicon.

The housing 140 may include at least one stopper 149 protruding from the outer surface of the first sides 141. The stopper 149 may protrude from the first sides 141 in a second or third direction to prevent the housing 140 from colliding with the cover member 300 when moving in the second and/or third direction. You can.

In order to prevent the bottom surface of the housing 140 from colliding with the base 210 and/or the circuit board 250, which will be described later, the housing 140 may further be provided with a stopper (not shown) protruding from the bottom surface. , By means of stoppers formed on the upper and lower surfaces of the housing 140, the housing 140 can be spaced downward from the base 210 and upward from the cover member 300, allowing the housing 140 to move along the optical axis without vertical interference. The direction height can be maintained. Accordingly, the housing 140 can perform a shifting operation in the second and third directions, which are forward, backward, left and right directions, in a plane perpendicular to the optical axis.

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

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

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

For example, the magnet 130 may be placed below the sensing coil 170. 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 in the initial position so as not to overlap each other in the optical axis direction, but are not limited to this.

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

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

The shape of the magnet 130 may be a shape corresponding to the first side 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 may be arranged so that the side facing the first coil 120 has an S pole, and the side opposite it has an N pole. However, this is not limited, and it is also possible to configure it in the opposite way.

At least two magnets 130 may be installed and may be arranged to face each other. For example, two pairs of magnets 130 facing each other so as to intersect may be disposed in the housing 140. At this time, the magnet 130 may have a substantially square shape, or alternatively, it may have a triangular or diamond shape.

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

Next, the upper elastic member 150, lower elastic member 160, and 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 and supports 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 and supports the lower part of the bobbin 110 and the lower part of the housing 140.

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

FIG. 6 shows a perspective view of the upper elastic member 150, lower elastic member 160, base 210, support member 220, and circuit board 250 shown in FIG. 1 combined.

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 separated 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 to achieve point symmetry on the x-y plane with respect to the center of the bobbin 110 or the housing 140. Here, point symmetry means symmetry in which the two shapes overlap each other when they are rotated 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.

The first to fourth upper elastic members 150-1 to 150-4 each have an inner frame 151 connected to the bobbin 110, an outer frame 152 and an inner frame 151 connected to the housing 140. ) and a frame connection portion 153 connecting the outer frame 152.

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 a through hole 151a coupled to the upper support protrusion 143 of the housing 140. A combined through hole 152a may be provided.

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

Additionally, the outer frames of the other two upper elastic members selected from 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 portion 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 another one of the first to fourth upper elastic members 150-1 to 150-4.

Additionally, 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 is connected to one end of the corresponding support members 220-1 to 220-4. You can.

The frame connection portion 153 may be bent at least once to form a pattern of a certain shape. The bobbin 110 may be elastically supported in an upward and/or downward motion in the first direction through a change in position and slight deformation of the frame connection portion 153.

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 portion 510 coupled to the housing 140 and the corresponding support member 220. It may include a second coupling portion 520 and a connecting portion 530 connecting the first coupling portion 510 and the second coupling portion 520.

The support members 220-1 to 220-4 may be directly bonded to the second coupling portion 520 of the outer frame 152 by soldering or a conductive adhesive member (eg, conductive epoxy).

The connection portion 530 may be straight or bent at least once, and the width of the connection portion 530 may be narrower than the width of the frame connection portion 153 of the upper elastic member 150. Since the width of the connection portion 530 is narrower than the width of the frame connection portion 153 of the upper elastic member 150, the connection portion 530 can be easily moved in the first direction, and as a result, the connection portion 530 is applied to the upper elastic member 150. The stress and the stress applied to the support member 220 can be distributed.

The lower elastic member 160 connects the inner frame 161 to the lower support protrusion of the bobbin 110, the outer frame 162 to the lower support protrusion of the housing 140, and the inner frame 161 and the outer frame. It may include a connection portion 163.

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

Next, the sensing coil 170 will be described.

The sensing coil 170 is wound directly on the side of the housing 140, for example, on the sides 141 and 142 of the housing 140. For example, the sensing coil 170 is directly connected to the sensing coil seating groove 141b provided on the first and second sides 141 and 142 of the housing 140 to rotate clockwise or counterclockwise about the optical axis. Can be wound. 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 to seat and bond the sensing coil. In this case, it is not easy to implement the sensing coil in a block shape according to the top shape of the housing, and since the sensing coil is bonded to the housing by hand, the reliability of adhesion between the sensing coil and the housing may be reduced. Additionally, because the sensing coil is disposed adjacent to the upper elastic member at the top 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, the sensing coil 170 is directly wound on the sensing coil seating groove 141b provided on the first and second sides 141 and 142 of the housing 140, so the sensing coil 170 is placed in the housing ( Since manual work for seating or bonding to the top of the 140 is not required, it is possible to prevent deterioration in bonding reliability between the sensing coil 170 and the housing 140 and between the sensing coil 170 and the upper elastic member 150.

Additionally, since the sensing coil 170 is disposed below the upper elastic member 150, there are no spatial restrictions in installing the upper elastic member 150 on the top of the housing 140.

In addition, each of the line-of-sight portion and the vertical line portion of the sensing coil 170 is placed in contact with an area of the first side wall 141 or the second side wall 142 of the housing 140, and the upper elastic member is formed through soldering. Since 150 is bonded to one area of the outer frame 152, the embodiment can easily perform soldering work.

The driving signal applied to the first coil 120 may be an alternating current signal, for example, a sinusoidal signal, or a pulse signal (for example, a pulse width modulation (PWM) signal). Alternatively, in another embodiment, the driving signal applied to the first coil 120 may include an alternating current signal and a direct current signal. Applying an alternating current signal to the first coil 120 is to generate electromotive force or induced voltage in the sensing coil 170 through mutual induction.

The first coil 120 may move in the first direction together with the bobbin 110 by electromagnetic force resulting from electromagnetic interaction between the current flowing in the first coil 120 due to 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. 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 sensed, and the displacement or drive signal of the bobbin 110 may be used for feedback control based on the detected displacement. It can be.

The sensing coil 170 may be disposed below 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.

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 arranged to correspond to the second sides 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 sides 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 in the form of a leaf spring on the first side 141 of the housing 140.

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 the induced voltage output from the sensing coil 170 A path for transmitting to the circuit board 250 can be formed.

The plurality of support members 220-1 to 220-4 may be implemented as members capable of supporting elasticity, for example, leaf springs, coil springs, suspension wires, etc. Additionally, in another embodiment, the support member 220 may be formed integrally 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 connection 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 portion 530 that can be easily moved in the first direction, the first support members 220-1 to 220-4 according to the embodiment are compared to general support members fixed to the housing 140. You can move in any direction more easily, which can improve the accuracy of hand shake correction. In particular, stress can be distributed against dropping and impact, and thus deformation and disconnection of the support members 220-1 to 220-4 can be suppressed.

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

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

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

The support members 220-1 to 220-4 may be located 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 that matches or corresponds to the cover member 300, for example, a square shape. .

FIG. 7 shows 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 be provided with a step 211 on which adhesive can be applied when fixing the cover member 300 by adhesive. At this time, the step 211 may guide the cover member 300 coupled to the upper side, and the end of the cover member 300 may be coupled so as to make surface contact.

A support portion 255 of a corresponding size may be formed on the surface of the base 210 that faces the portion of the circuit board 250 where the terminals 251 are formed. The support portion 255 of the base 210 is formed with a constant cross-section from the outer surface of the base 210 without steps 211, and can support the terminal surface 253 of the circuit board 250.

An edge of the base 210 may have a groove 212. When the edge of the cover member 300 has a protruding shape, the protrusion of the cover member 300 may be fastened to the base 210 in the groove 212.

Additionally, seating grooves 215-1 and 215-2 in which the OIS position sensor 240 can be placed 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. By being placed in 215-2), the degree to which the housing 140 moves in the second and third directions can be detected. For this purpose, virtual 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 intersect each other. For example, the seating of the base 210 The angle formed by the virtual 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.

The second coil 230 may be placed at the top and the OIS position sensor 240 may be placed at the bottom of the circuit board 250.

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

The OIS position sensor 240 may include a first OIS position sensor 240a and a second OIS position sensor 240b arranged to be orthogonal to each other in order to detect the displacement of the housing 140 in a direction perpendicular to the optical axis. there is.

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. You can. The shape of the outer peripheral surface of the circuit board 250 may be consistent with or correspond to the upper surface of the base 210, for example, a square shape.

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

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

The second coil 230 may include a through hole 230a penetrating the circuit member 231. The support member 220 may be electrically connected to the circuit board 250 through the through hole 230a.

The second coil 230 is disposed on the upper part of the circuit board 250 to face the magnet 130 disposed in 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 only two, such as one for the second direction and one for the third direction, may be installed. It is possible, and more than 4 can be installed.

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

The OIS position sensors 240a and 240b may be provided as Hall sensors, and any sensor that can detect magnetic field strength can 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 may be implemented solely as a position detection sensor such as a Hall sensor.

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 prepared as an FPCB, but this is not limited, and the terminals of the circuit board 250 may be formed directly on the surface of the base 210 using a surface electrode method, etc. do.

In another embodiment, the circuit board 250 may include a hole through which the support member 220 can penetrate. The support member 220 may be electrically connected to a corresponding circuit pattern that may be placed on the bottom of the circuit board 250 through a hole in the circuit board 250, such as by soldering.

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

The circuit board 250 may further include a through hole 250b coupled to the upper support protrusion 217 of the base 210. The upper support protrusion 217 and the through hole 250b of the base 210 may be fixed with an adhesive member such as epoxy.

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

Referring to FIGS. 8, 9A, and 9B, the sensing coil 170 has a seating groove 141b for the sensing coil provided on the first sides 141 and the second sides 142 of the housing 140. It is wound directly within.

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 unit without power being applied to the first coil 120, or the position at which the AF movable unit is placed as the upper and lower elastic members 150 and 160 are elastically deformed only by the weight of the AF movable unit. It can be. The AF movable unit may include the bobbin 110 and components mounted on the bobbin 110.

Additionally, in the initial position, the sensing coil 170 is positioned at a preset distance from the first coil 120 in the first direction, and may not overlap the first coil 120 in a direction perpendicular to the first direction. . Maintaining a preset distance between the first coil and the sensing coil 170 in the first direction is to ensure linearity of the induced voltage induced in the sensing coil 170 by the current of the first coil 120.

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

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

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

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 portions 170-2 of the sensing coil 170 may be located outside the support member 220. For example, each of the second parts 170-2 of the sensing coil 170 may be located 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 portions 170-2 of the sensing coil 170. smaller than the distance For example, the separation distance between one support member (e.g., 220-1) based on the center of the housing 140 is the second part of the sensing coil 170 corresponding to one support member (e.g., 220-1). It may be smaller than the separation distance of (170-2).

The sensing coil 170 does not overlap the frame connection portion 153 of each of the first to fourth upper elastic members 150-1 to 150-4 in the first direction.

Figure 10 shows a partial cross-sectional view taken along line II-II' to explain the relative position between the sensing coil 170 and the support member 220 according to the embodiment, and Figure 11 shows the sensing coil 170 and the support member 220 according to the embodiment. A partial cross-sectional view taken along line I-I' is shown to illustrate the relative positions between the support members 220.

Figures 10 and 11 (a) show a partial cross-sectional view of the lens driving device including the sensing coil 170 disposed inside the support member 220-1, and Figures 10 and 11 (b) show an implementation An example shows some cross-sectional views of different lens driving devices. Assume that the top of the housing 140 in Figures 10 and 11 (a) and the top of the housing 140 in Figures 10 and 11 (b) are aligned with the same reference line 101.

10 and 11, the sensing coil 170 is installed in the housing 140 so that the second portion 170-2 of the sensing coil 170 is located outside the support members 220-1 to 220-4. ), the embodiment may wind the sensing coil 170 on the top of the outer surface of the first and second sides 141 and 142 of the housing 140, and once on the housing 140. The length of the wound sensing coil 170 can be increased. As the length of the sensing coil 170 wound once increases, the number of turns of the housing 140 to implement the sensing coil 170 having a preset resistance value can be reduced. And as the number of turns of the sensing coil 170 decreases, the area of the housing 140 required for the sensing coil 170 can be reduced, and the area for placing the magnet 130 can be increased so that it can be mounted on the housing 140. The magnet size can be increased.

For example, the resistance value of the sensing coil is affected by temperature changes, and the sensing current may change due to this change in the resistance value of the sensing coil. Since the influence of sensing current due to such temperature changes can cause malfunction of AF drive, temperature compensation is necessary. Such temperature compensation can be easily performed by setting the resistance of the sensing coil to a preset resistance value (eg, 30Ω) or more. The embodiment may implement a preset resistance value to facilitate temperature compensation with a small number of turns.

Ultimately, by securing space in the housing 140 where the magnet 130 having a larger size can be placed, the embodiment can increase electromagnetic force due to interaction with the magnet 130.

While a magnet 130 having a first width L1 and a first height H1 can be placed in the housing 140 where the sensing coil 170 shown in (a) of FIG. 11 is disposed, in FIG. A magnet 130 having a second width (L2>L1) and a second height (H2>H1) may be placed in the housing 140 where the sensing coil 170 shown in (b) of 11 is disposed. .

FIG. 12 is a top view showing the arrangement of the sensing coil 170 shown in (a) of FIG. 10, and FIG. 13 is a top view showing the arrangement of the sensing coil 170 shown in (b) of FIG. 10.

12 and 13, because the curvature (R2) of the curved portion 302 of the sensing coil 170 according to the embodiment is smaller than the curvature (R1) of the curved portion 301 of the sensing coil 170, The length of one turn of the sensing coil 170 is greater than the length of one turn of the sensing coil 170.

As described above, in the embodiment, the sensing coil 170 is wound directly on the outer surface of the first and second sides 141 and 142 of the housing 140, so the sensing coil 170 and the housing 140 or the sensing coil Deterioration of 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 space limitations in installing the upper elastic member 150 at the top of the housing 140. I don't receive it.

In addition, because the sensing coil 170 is disposed outside the support member 220, the length of the outermost circumference of the sensing coil 170 can be maximized, and the sensing coil 170 has a preset resistance with a small number of turns. can be implemented, and the electromagnetic force for AF or OIS driving can be increased by increasing the size of the magnet 130 that can be placed in the housing 140.

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

Referring to FIG. 14, the camera module includes a lens barrel 400, a lens driving device 100, an adhesive member 612, a filter 610, a first holder 600, a second holder 800, and an image sensor ( 810), a motion sensor 820, a control unit 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 placed below 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 612 may couple or attach the base 210 of the lens driving device 100 to the first holder 600. In addition to the adhesive role described above, the adhesive member 612 may also serve to prevent foreign substances from entering the lens driving device 100.

For example, the adhesive member 612 may be epoxy, thermosetting adhesive, ultraviolet curing adhesive, etc.

The filter 610 may serve to block light of a specific frequency band from light passing through the lens barrel 400 from entering the image sensor 810. The filter 610 may be an infrared blocking filter, but is not limited thereto. At this time, the filter 610 may be arranged 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 can enter the image sensor 810.

The second holder 800 is 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 site where light passing through the filter 610 is incident and an image included in the light is formed.

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

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

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 arranged to be spaced apart from each other in the first direction.

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

The motion sensor 820 outputs rotational angular velocity information resulting from 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 control unit 820 is mounted on the second holder 800 and may be 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 control unit 820 mounted on the second holder 800 may be connected to the circuit board 250 through the circuit board 250. 2 It may be electrically connected to the position sensor 240 and the second coil 230.

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

The connector 840 is electrically connected to the second holder 800 and may have a port for electrical connection to an external device.

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

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

15 and 16, the portable terminal (200A, hereinafter referred to as “terminal”) includes a body 850, a wireless communication unit 710, an A/V input unit 720, a sensing unit 740, and an input/output unit 720. 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 to this, and may be a slide type, folder type, or swing type in which two or more sub-bodies are coupled to enable relative movement. It may have various structures such as , swirl type, etc.

The body 850 may include a case (casing, housing, cover, etc.) that forms the exterior. 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 built into the space formed between the front case 851 and the rear case 852.

The wireless communication unit 710 may be configured to include one or more modules that enable wireless communication between the terminal 200A and a wireless communication system or between the terminal 200A and the network where the terminal 200A is located. For example, the wireless communication unit 710 may be configured to include a broadcast reception module 711, a mobile communication module 712, a wireless Internet module 713, a short-range communication module 714, and a location information module 715. there is.

The A/V (Audio/Video) input unit 720 is for inputting audio or video signals 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 monitors the current state of the terminal 200A, such as the open/closed state of the terminal 200A, the location of the terminal 200A, presence or absence of user contact, the direction of the terminal 200A, acceleration/deceleration of the terminal 200A, etc. It is possible to detect and generate a sensing signal to control the operation of the terminal 200A. For example, if the terminal 200A is in the form of a slide phone, it can sense whether the slide phone is opened or closed. In addition, it is responsible for sensing functions related to whether the power supply unit 790 supplies power and whether the interface unit 770 is connected to an external device.

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

The input/output unit 750 may include a key pad unit 730, a display module 751, a sound output module 752, and a touch screen panel 753. The key pad unit 730 can generate input data through key pad 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, or a three-dimensional display. It may include at least one display (3D display).

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

The touch screen panel 753 can convert the change in capacitance that occurs due to the 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 controlling the control unit 780 and stores input/output data (e.g., phone book, messages, audio, still images, photos, videos, etc.). It can be stored temporarily. For example, the memory unit 760 may store images captured by the camera 721, such as photos or videos.

The interface unit 770 serves as a passage connecting external devices connected to the terminal 200A. The interface unit 770 receives data from an external device, 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 includes a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port for connecting a device equipped with an identification module, and audio I/O (Input/ Output) port, video I/O (Input/Output) port, and earphone port.

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

The control unit 780 may be equipped with a multimedia module 781 for multimedia playback. The multimedia module 781 may be implemented within the control unit 180 or may be implemented separately from the control unit 780.

The control unit 780 can perform pattern recognition processing to recognize handwriting or drawing input on the touch screen as text and images, respectively.

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

The 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 and implemented in other embodiments by a person with ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications 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 (15)

housing;
a bobbin disposed within the housing;
a magnet disposed on a first side of the housing;
a first coil disposed on the bobbin and moving the bobbin in the optical axis direction by interacting with the magnet;
an upper elastic member coupled to the bobbin and the housing;
a support member disposed on a second side of the housing, one end of which is connected to the upper elastic member; and
A sensing coil disposed in the housing and generating an induced voltage by interacting with the first coil,
The sensing coil includes a first part disposed on an outer surface of the first side of the housing and a second part disposed on an outer surface of the second side of the housing. According to paragraph 1,
The first side includes a plurality of first sides,
The second side is disposed between two adjacent first sides among the plurality of first sides,
The sensing coil is a lens driving device disposed on outer surfaces of the first and second sides. According to paragraph 1,
The lens driving device wherein the second portion of the sensing coil is curved. According to paragraph 1,
The sensing coil is disposed on top of the outer surfaces of the first and second sides of the housing. According to paragraph 1,
The second portion of the sensing coil is located outside the support member,
A lens driving device in which an outside of the support member is opposite to the center of the housing with respect to the support member. According to paragraph 1,
Seating grooves are formed on outer surfaces of the first and second sides of the housing,
A lens driving device wherein the sensing coil is disposed in the seating groove. According to paragraph 1,
A lens driving device wherein the separation distance from the center of the housing to the support member is smaller than the separation distance from the center of the housing to the second portion of the sensing coil. According to paragraph 1,
The upper elastic member includes a plurality of divided upper elastic members,
Each of the plurality of divided upper elastic members,
an inner frame coupled to the bobbin;
an outer frame coupled to the housing; and
It includes a frame connector connecting the inner frame and the outer frame,
A lens driving device in which the sensing coil does not overlap the frame connection portion in a direction parallel to the optical axis. According to paragraph 1,
The sensing coil is spaced apart from the magnet,
The sensing coil is located below the upper elastic member and above the magnet. According to paragraph 1,
A lens driving device in which, at the initial position of the bobbin, the sensing coil does not overlap the first coil in a direction perpendicular to the optical axis. According to paragraph 1,
The support member is a lens driving device positioned between the first coil and the sensing coil in a direction perpendicular to the optical axis. According to clause 6,
The housing includes a hole through which the support member passes through the second side of the housing,
The seating groove includes a first groove provided on the first side of the housing, and a second groove provided on the second side of the housing,
The first distance is greater than the second distance,
The first distance is a separation distance between the second groove and an imaginary straight line passing through the center of the housing and parallel to the optical axis, and the second distance is a separation distance between the imaginary straight line and the through hole. According to paragraph 1,
a second coil that moves the housing by interaction with the magnet; and
A lens driving device including a circuit board electrically connected to the support member. A housing including a first side and a second side;
a bobbin disposed within the housing;
a magnet disposed on the first side of the housing;
a first coil disposed on the bobbin and moving the bobbin in the optical axis direction by interacting with the magnet;
an upper elastic member coupled to the bobbin and the housing;
a support member disposed on the second side of the housing, one end of which is connected to the upper elastic member; and
A sensing coil disposed in the housing and generating an induced voltage by interacting with the first coil,
Seating grooves are formed on outer surfaces of the first and second sides of the housing,
A lens driving device wherein the sensing coil is disposed in the seating groove of the housing. housing;
a bobbin disposed within the housing;
A magnet disposed in the housing;
a first coil disposed on the bobbin and moving the bobbin in the optical axis direction by interacting with the magnet;
an upper elastic member coupled to the bobbin and the housing;
a support member whose end is connected to the upper elastic member; and
A sensing coil disposed in the housing and generating an induced voltage by interacting with the first coil,
The housing includes a groove formed on an outer surface of the housing to place the sensing coil, and a through hole for a portion of the support member to pass through,
The first distance is greater than the second distance,
The first distance is the separation distance between the groove of the housing and an imaginary straight line passing through the center of the housing and parallel to the optical axis, and the second distance is the separation distance between the imaginary straight line and the aperture of the housing. Device.

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