KR102657604B1 - A lens moving unit, and camera module and optical instrument including the same - Google Patents

Abstract

The embodiment includes a housing, a bobbin disposed inside the housing and for mounting a lens, a first coil disposed in the bobbin and provided with a first driving signal, a magnet disposed in the housing, and a base disposed below the housing. , and a first circuit board disposed on the upper surface of the base, wherein the first circuit board includes a body disposed on the upper surface of the base, a terminal portion connected to the body and disposed on an outer surface of the base. , at least one connection terminal disposed on the front side of the terminal portion and electrically connected to the first coil, and at least one dummy terminal disposed on the back side of the terminal portion.

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 toward 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.

An embodiment provides a lens driving device capable of improving solderability of connection terminals of a circuit board, and a camera module and optical device including the same.

A lens driving device according to an embodiment includes a housing; a bobbin disposed inside the housing and for mounting a lens; a first coil disposed on the bobbin and provided with a first driving signal; A magnet disposed in the housing; a base disposed below the housing; and a first circuit board disposed on the upper surface of the base, wherein the first circuit board includes a body disposed on the upper surface of the base; a terminal portion connected to the body and disposed on an outer surface of the base; at least one connection terminal disposed on the front of the terminal unit and electrically connected to the first coil; and at least one dummy terminal disposed on the rear side of the terminal portion.

The at least one dummy terminal may overlap the at least one connection terminal in a direction perpendicular to the front surface of the terminal unit.

The first circuit board may include a plurality of connection terminals and a plurality of dummy terminals, and the plurality of dummy terminals may be spaced apart from each other.

The terminal portion of the first circuit board includes an insulating member; a first conductive layer disposed on the upper surface of the insulating member; a second conductive layer disposed on the lower surface of the insulating member; a first coating layer disposed on the first conductive layer; and a second coating layer disposed on the second conductive layer, wherein the at least one connection terminal is a region of the first conductive layer exposed from the first coating layer, and the at least one dummy terminal is the second coating layer. It may be a region of the second conductive layer exposed from the coating layer.

The at least one dummy terminal may be in contact with the bottom of the rear surface of the terminal unit.

The area of the dummy terminal may be smaller than the area of the connection terminal.

The length of the dummy terminal in the longitudinal direction of the terminal portion may be shorter than the length of the connection terminal in the longitudinal direction of the terminal portion.

The length of the dummy terminal in a direction perpendicular to the longitudinal direction of the terminal portion may be shorter than the length of the connection terminal in a direction perpendicular to the longitudinal direction of the terminal portion.

The base may include a groove facing the dummy terminal at the bottom of the outer surface.

The base may include a support portion supporting the terminal portion of the first circuit board on an outer surface, and the groove may be disposed at a lower end of the outer surface of the support portion.

The groove may be in the shape of a line formed at the bottom of the outer surface of the support portion.

The bottom of the groove may be located on the same plane as the top of the dummy terminal.

The lens driving device may further include a second coil disposed on the first circuit board and to which a first driving signal is applied.

Additionally, the lens driving device includes elastic members coupled to the bobbin and the housing; and support members connecting the elastic members and the first circuit board.

A virtual center line bisecting the connection terminal and a virtual second center line bisecting the dummy terminal may be aligned with each other in a direction perpendicular to the front surface of the terminal portion.

One end of the connection terminal may be in contact with the bottom of the front surface of the terminal portion.

Each of the plurality of dummy terminals may be arranged to correspond to one of the plurality of connection terminals.

A gap may exist between the at least one dummy terminal and an outer surface of the base.

The separation distance between the at least one dummy terminal and the outer surface of the base may be 70㎛ to 80㎛.

A camera module according to an embodiment includes a lens; the above-described lens driving device that moves the lens; an image sensor that converts an image incident through the lens driving device into an electrical signal; and a control unit providing the first driving signal to the first coil.

The camera module includes a second circuit board including at least one pad; And it may further include solder that attaches at least one connection terminal of the first circuit board and at least one pad of the second circuit board to each other.

The solder may be in contact with the at least one connection terminal and the at least one dummy terminal.

A portion of the solder may be located between the dummy terminal and the outer surface of the base.

The camera module further includes an adhesive member disposed between the outer surface of the base and the rear surface of the terminal portion of the circuit board, and the adhesive member may be located on a portion of the solder.

An optical device according to an embodiment includes a display module including a plurality of pixels whose colors change by electrical signals; The above-described camera module that converts the image incident through the lens into an electrical signal; and a control unit that controls the display module and the camera module.

The embodiment can improve solderability of connection terminals of a circuit board.

Figure 1 shows a perspective view of a lens driving device according to an embodiment.
FIG. 2 is an exploded perspective view of the lens driving device shown in FIG. 1.
Figure 3 shows a combined perspective view of the lens driving device of Figure 1 excluding the cover.
FIG. 4A is a first perspective view of the bobbin and first coil shown in FIG. 1.
FIG. 4B is a second perspective view of the bobbin and first coil shown in FIG. 1.
FIG. 5A is a first perspective view of the housing shown in FIG. 1.
FIG. 5B is a second perspective view of the housing shown in FIG. 1.
FIG. 6 shows a cross-sectional view in the AB direction of the lens driving device shown in FIG. 3.
FIG. 7 shows a combined perspective view of the upper elastic member, lower elastic member, support member, second coil, circuit board, and base of FIG. 2 .
Figure 8 shows an exploded perspective view of the second coil, circuit board, base, and first and second OIS position sensors.
Figure 9A shows a cross-sectional view of a lens driving device according to another embodiment.
Figure 9b shows a cross-sectional view of a lens driving device according to another embodiment.
Figure 10 shows a first bottom perspective view of a circuit board according to an embodiment.
FIG. 11 shows a second bottom perspective view of the circuit board shown in FIG. 10.
FIG. 12 shows a partially enlarged view of the terminal portion shown in FIG. 10.
FIG. 13 shows a cross-sectional view in the AB direction of the terminal portion shown in FIG. 10.
Figure 14 shows a bottom perspective view of the base according to an embodiment.
Figure 15 shows an enlarged portion of the base of Figure 14 combined with a circuit board.
Figure 16 shows an exploded perspective view of a camera module according to an embodiment.
Figure 17 shows solder disposed between the terminal portion of the lens driving device and the pad of the second holder of the camera module according to the embodiment.
FIG. 18 shows a block diagram of the image sensor shown in FIG. 17 according to an embodiment.
Figure 19 shows a perspective view of a portable terminal according to an embodiment.
FIG. 20 shows a configuration diagram of the portable terminal shown in FIG. 19.

Hereinafter, embodiments of the present invention that can specifically realize the above object will be described with reference to the attached drawings.

In the description of the embodiment, in the case where each element is described as being formed “on or under”, “on or under” means This includes both elements that are in direct contact with each other or one or more other elements that are formed (indirectly) between the two elements. Additionally, when expressed as "on or under", it can include not only the upward direction but also the downward direction based on one element.

In addition, relational terms such as “first” and “second”, “top/top/top” and “bottom/bottom/bottom” used below refer to any physical or logical relationship or order between such entities or elements. It does not necessarily require or imply, and may be used only to distinguish one entity or element from another entity or element. Additionally, the same reference numbers indicate the same elements throughout the description of the 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 to this. In each drawing, the x-axis and y-axis refer to directions perpendicular to the z-axis, which is the direction of the optical axis. The z-axis direction, which is the optical axis or a direction parallel to the optical axis, is called the 'first direction', and the x-axis direction is called the 'second direction'. ', and the y-axis direction can 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 the optical module composed of at least one lens in a first direction parallel to the optical axis, or moves the optical module in the first direction parallel to the optical axis. An image stabilization operation and/or an auto-focusing operation may be performed by moving about a surface formed by the second and third directions perpendicular to the .

FIG. 1 shows a perspective view of the lens driving device 100 according to an embodiment, FIG. 2 is an exploded perspective view of the lens driving device 100 shown in FIG. 1, and FIG. 3 shows the lens of FIG. 1 excluding the cover 300. A combined perspective view of the driving device 100 is shown.

1 to 3, the lens driving device 100 includes a cover member 300, a bobbin 110, a first coil 120, a magnet 130, a housing 140, and an upper elastic member 150. , a lower elastic member 160, a base 310, a plurality of support members 220, and a circuit board 250.

The lens driving device 100 may include a second coil 230 that interacts with the magnet 130 to correct hand shake. Additionally, the lens driving device 100 may further include a position sensor 240 for feedback OIS operation.

First, the cover member 300 will be described.

The cover member 300 accommodates other components 110, 120, 130, 140, 150, 160, and 250 in an accommodating space formed together with the base 210.

The cover member 300 may be in the shape of a box with an open lower part including a top part and side walls, and the lower part of the cover member 300 may be coupled to the upper part 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.

The bobbin 110 is disposed inside the housing 140 and can move in a first direction, for example, the Z-axis direction, by electromagnetic interaction between the first coil 120 and the magnet 130.

For example, when a drive signal, such as a drive current, is supplied to the first coil 120, the bobbin 110 may rise from its initial position, and when the supply of the drive signal is cut off, the bobbin 120 may fall, An auto-focusing function may be implemented.

Also, for example, when a forward driving current is applied, the bobbin 110 may move upward from the initial position, and when a reverse current is applied, the bobbin 110 may move downward from the initial position.

The bobbin 110 may have a hollow structure for mounting a lens or lens barrel. The shape of the hollow may be circular, oval, or polygonal, but is not limited thereto.

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

FIG. 4A is a first perspective view of the bobbin 110 and the first coil 120 shown in FIG. 1, and FIG. 4B is a second perspective view of the bobbin 110 and the first coil 120 shown in FIG. 1.

Referring to FIGS. 4A and 4B, the bobbin 110 has a first protrusion 111 protruding from the upper surface in a first direction, and a first protrusion 111 protruding from the outer peripheral surface of the bobbin 110 in the second and/or third directions. 2 may include a protrusion 112.

The first protrusion 111 of the bobbin 110 may include a guide portion 111a and a first stopper 1111b. The guide portion 111a of the bobbin 110 may serve to guide the installation position of the upper elastic member 150. For example, the guide portion 11a of the bobbin 110 may guide the first frame connection portion 153 of the upper elastic member 150.

The second protrusion 112 of the bobbin 110 may be formed to protrude from the outer peripheral surface 110b of the bobbin 110 in a second and/or third direction perpendicular to the first direction.

Additionally, a first upper support protrusion 113 that engages the through hole 151a of the first inner frame 151 of the upper elastic member 150 may be provided on the upper surface of the bobbin 110.

When the bobbin 110 moves in the first direction for the auto-focusing function, the first stopper 111b and the second protrusion 112 of the bobbin 110 prevent the bobbin 110 from moving beyond the specified range due to an external impact, etc. Even if it moves, it can prevent the upper surface of the bobbin 110 from directly colliding with the inside of the cover member 300.

The bobbin 110 may be provided on its lower surface with a first lower support protrusion 117 that is coupled to and fixed to the through hole 161a of the lower elastic member 160.

The bobbin 110 may be provided with a second stopper 116 protruding from the lower surface, and the second stopper 116 may be damaged by an external shock, etc. when the bobbin 110 moves in the first direction for the auto focusing function. Even if the bobbin 110 moves beyond the specified range, it can prevent the lower surface of the bobbin 110 from directly colliding with the base 210, the second coil 230, or the circuit board 250. there is.

The outer peripheral surface 110b of the bobbin 110 may include first side parts 110b-1 and second side parts 110b-2 located between the first side parts 110b-1.

The first sides 110b-1 of the bobbin 110 may correspond to or face the magnet 130. Each of the second sides 110b-2 of the bobbin 110 may be disposed between two adjacent first sides.

The outer peripheral surface of each of the first side parts 110b-1 of the bobbin 110 may be flat, and the outer peripheral surface of each of the second side parts 110b-2 may be curved, but the present invention is not limited thereto.

The bobbin 110 may be provided with at least one first coil groove (not shown) in which the first coil 120 is disposed or installed on the outer peripheral surface 110b. For example, grooves for the first coil may be provided on the first and second sides of the bobbin 110. The shape and number of grooves for the first coil may correspond to the shape and number of the first coils 120 disposed on the outer peripheral surface 110b of the bobbin 110. In another embodiment, the bobbin 110 may not have a groove for the first 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 110b of the bobbin 110 and is a driving coil that electromagnetically interacts with the magnet 130 disposed in the housing 140.

A driving signal (eg, driving current or voltage) may be applied to the first coil 120 to generate electromagnetic force by interaction with the magnet 130.

The driving signal applied to the first coil 120 may be an alternating current signal, for example, an alternating current. For example, the driving signal provided to the first coil 120 may be a sinusoidal 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 alternating current signal and a direct current signal. Applying an alternating current signal, for example, an alternating current, to the first coil 120 is to induce electromotive force or voltage in the second coil 172 through a mutual induction effect.

The AF movable unit may move in the first direction by 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 electromagnetic force caused by the interaction between the first coil 120 and the magnet 130, the movement of the AF movable unit in the first direction can be controlled, Due to this, an 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 or lower elastic members 150 and 160, and may be connected to the circuit through the upper or lower elastic members 150 and lower elastic members 150 and 160 and the support members 220. It may be electrically connected to the substrate 250.

The housing 140 accommodates the bobbin 110 on which the first coil 120 is disposed inside and supports the magnet 130.

FIG. 5A is a first perspective view of the housing 140 shown in FIG. 1, FIG. 5B is a second perspective view of the housing 140 shown in FIG. 1, and FIG. 6 is a lens driving device 100 shown in FIG. 3. Shows a cross-sectional view in the AB direction.

Referring to FIGS. 5A, 5B, and 6, the housing 140 may have an overall hollow column shape and may include a plurality of first sides 141 and second sides 142 forming a hollow body. You can.

For example, the housing 140 may include first sides 141 spaced apart from each other and second sides 142 spaced apart from each other. Each of the first sides 1141 of the housing 140 may be disposed or located between two adjacent second sides 142, connect the second sides 142 to each other, and have a predetermined depth. It may include the plane of .

A magnet 130 may be disposed or installed on the first sides 141 of the housing 140, and a support member 220 may be disposed on the second sides 141 of the housing 140.

The housing 140 may include a magnet seating portion 141a provided on the inner surface of the first side portions 141 to support or accommodate the magnets 130-1 to 130-4.

The first sides 141 of the housing 140 may be arranged parallel to the side plate of the cover member 300. A through hole 147a through which the support member 220 passes may be provided in the second sides 142 of the housing 140.

Additionally, in order to prevent direct collision with the inner surface of the cover member 300, a second stopper 144 may be provided on the upper surface of the housing 140.

The housing 140 has at least one second upper support protrusion 143 on the upper surface of the second side portions 142 for coupling to the through hole 152a of the first outer frame 152 of the upper elastic member 150. It may be provided with a second lower support protrusion 145 on the lower surface of the second side portions 142 for coupling and fixing the lower elastic member 160 to the through hole 162a of the second outer frame 162. can be provided.

The housing 140 has a groove 142a provided on the second side 142 not only to secure the path through which the support member 220 passes, but also to secure a space for filling silicon that can play a damping role. It can be provided. For example, the groove 142a of the housing 140 may be filled with damping silicon.

The housing 140 may be provided with a third stopper 149 protruding from the side of the first sides 141 in the second or third direction. The third stopper 149 is used to prevent the housing 140 from colliding with the inner surface of the side plate of the cover member 300 when it moves in the second and third directions.

In order to prevent the bottom surface of the housing 140 from colliding with the base 210, the second coil 230, and/or the circuit board 250, which will be described later, the housing 140 has a fourth stopper protruding from the bottom surface. (not shown) may be further provided.

The magnets 130-1 to 130-4 are accommodated inside the first sides 141 of the housing 140, but are not limited thereto. In another embodiment, the magnets 130-1 to 130-4 may be disposed outside the first sides 141 of the housing 140.

The magnet 130 may be disposed on the first sides 141 of the housing 140 to correspond to or be aligned with the first coil 120 in a direction perpendicular to the optical axis direction.

For example, the magnets 130-1 to 130-4 disposed in the housing 130 may overlap the first coil 120 in the second or third direction at the initial position of the bobbin 110. there is. Here, the initial position of the bobbin 110 is the initial position of the AF movable part without power applied to the first coil 120, or the upper and lower elastic members 150 and 160 are elastically deformed only by the weight of the AF movable part. Depending on the location, the AF movable part may be placed. The AF movable unit may include the bobbin 110 and components mounted on the bobbin 110.

In another embodiment, the magnet seating portion 141a is not provided on the first sides 141 of the housing 140, and the magnet 130 is located on the outside or inside of the first sides 141 of the housing 140. It may be placed in either one.

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

The magnet 130 may be a unipolar magnetized magnet or a bipolar magnetized magnet arranged so that the surface facing the first coil 120 is the S pole and the outer surface is the N pole. However, this is not limited, and it is also possible to configure it in the opposite way.

In the embodiment, the number of magnets 130 is 4, but the number is not limited thereto. The number of magnets 130 may be at least 2, and the surface of the magnet 130 facing the first coil 120 is flat. It may be formed as a curved surface, but it is not limited thereto.

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

The upper elastic member 150 and the lower elastic member 160 are coupled to the bobbin 110 and the housing 140 and can elastically support the bobbin 110.

FIG. 7 shows a perspective view of the upper elastic member 150, lower elastic member 160, support member 220, second coil 230, circuit board 250, and base 210 of FIG. 2 combined.

Referring to FIG. 7, the upper elastic member 150 and the lower elastic member 160 are coupled to the bobbin 110 and the housing 140 and elastically support the bobbin 110.

For example, the upper elastic member 150 may be coupled to the top, upper surface, or upper end of the bobbin 110 and the upper, upper surface, or upper end of the housing 140, and the lower elastic member 160 may be coupled to the bobbin 110. ) can be combined with the lower part, lower surface, or lower end of the housing 140.

At least one of the upper and lower elastic members 150 and 160 may be divided or separated into two or more.

For example, the upper elastic member 150 may include first to fourth upper elastic members 150-1 to 150-4 spaced apart from each other.

The upper elastic member 150 and the lower elastic member 160 may be implemented as leaf springs, but are not limited thereto, and may also be implemented as coil springs, suspension wires, etc.

Each of the first to fourth upper elastic members 150-1 to 150-4 is coupled to the top, upper surface, or top of the bobbin 110, the first inner frame 151, the upper part of the housing 140, It may include a first outer frame 152 coupled to the upper surface or the top, and a first frame connection portion 153 connecting the first inner frame 151 and the first outer frame 152.

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

The lower elastic member 160 includes a second inner frame 161 coupled to the lower part, lower surface, or bottom of the bobbin 110, and a second outer frame coupled to the lower part, lower surface, or lower end of the housing 140 ( 162), and a second frame connection portion 163 connecting the second inner frame 161 and the second outer frame 162.

Each of the first and second frame connection portions 153 and 163 of the upper and lower elastic members 150 and 160 may be bent or curved at least once to form a pattern of a certain shape. . The bobbin 110 may be elastically (or elastically) supported in an upward and/or downward motion in the first direction through a change in position and slight deformation of the first and second frame connectors 153 and 163.

For example, one end of the first coil 120 may be bonded to the first inner frame 151 of any one of the upper elastic members 150-1 to 150-4 (e.g., 150-1), and the first The other end of the coil 120 may be bonded to the first inner frame 151 of another one of the upper elastic members 150-1 to 150-4 (eg, 150-2).

For example, the first inner frame 151 of each of the first and second upper elastic members 150-1 to 150-2 has a first connection portion to which the first coil 120 is connected by soldering or a conductive adhesive member. It can be provided.

Each of the first to fourth upper elastic members 150-1 to 150-4 has a through hole 151a disposed on the first inner frame 151 and coupled to the first upper support protrusion 113 of the bobbin 110. , and a through hole 152a disposed on the first outer frame 152 and coupled to the second upper support protrusion 144 of the housing 140.

In addition, the lower elastic member 160 is disposed on the second inner frame 161, the through hole 161a coupled to the first lower support protrusion 117 of the bobbin 110, and the second outer frame 162. It may be provided with a through hole 162a coupled to the second lower support protrusion 147 of the housing 140.

In order to absorb and buffer the vibration of the bobbin 110, the lens driving device 100 includes a first damping member (not shown) disposed between each of the upper elastic members 150-1 to 150-4 and the housing 140. ) can be further provided.

For example, a first damping member (not shown) may be disposed in the space between the first frame connection portion 153 of each of the upper elastic members 150-1 to 150-4 and the housing 140.

Also, for example, the lens driving device 100 may further include a second damping member (not shown) disposed between the second frame connection portion 163 of the lower elastic member 160 and the housing 140.

Additionally, for example, a damping member (not shown) may be further disposed between the inner surface of the housing 140 and the outer peripheral surface of the bobbin 110.

By using the two electrically separated upper elastic members and the corresponding support members, the circuit board 250 and the first coil 120 can be electrically connected, and the first coil 120 can be connected from the circuit board 250 to the first coil 120. ) a driving signal may be provided. However, the embodiment is not limited thereto.

According to another embodiment, the roles of the plurality of upper elastic members 150 and the roles of the plurality of lower elastic members 160 may be interchanged. That is, the lower elastic member 160 may be separated into a plurality of lower elastic members, and the circuit board 250 and the first coil may be electrically connected using the two electrically separated lower elastic members.

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 positioned to correspond to the second sides 142 of the housing 140, and the bobbin 110 The bobbin 110 and the housing 140 may be supported so that the housing 140 can move in a direction perpendicular to the first direction.

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 .

In FIG. 7, one support member is disposed on each of the second sides of the housing 140, but the present invention is not limited thereto.

In another embodiment, two or more support members may be disposed on each of the second sides of the housing 140, and the upper elastic member 150 may be separated and spaced apart from each other on at least one of the second sides of the housing 140. It may include two or more upper elastic members. For example, two support members disposed on a second side of the housing 140 may be connected to a corresponding one of two separate upper elastic members disposed on a second side.

One end of each of the support members 220-1 to 220-4 may be bonded to the outer frame 152 of the upper elastic members 150-1 to 150-4 disposed on the corresponding second side. 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 attached to the upper elastic members 150-1 to 150-4. It can be directly connected to the connection portion 530 of the outer frame 153.

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 and the upper elastic members 150 - 1 to 150 - 4 may transmit a driving signal from the circuit board 250 to the first coil 120 .

The plurality of support members 220-1 to 220-4 may be formed as separate members from the upper elastic member 1150, and may be supported by elasticity, such as a leaf spring or coil. It can be implemented with springs (coil springs), suspension wires, etc. Additionally, in another embodiment, the support members 220-1 to 220-4 may be formed integrally with the upper elastic member 150.

Next, the base 210, the second coil 230, the position sensor 240, and the circuit board 250 will be described.

Figure 8 shows an exploded perspective view of the second coil 230, the circuit board 250, the base 210, and the first and second OIS position sensors 240a and 240b.

Referring to FIG. 8, the base 210 may be combined with the cover member 300 to form a space for receiving the bobbin 110 and the housing 140. 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. You can.

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 side plate of the cover member 300 may be coupled so as to make surface contact.

The step 211 of the base 210 and the end of the side plate of the cover member 300 may be glued or fixed with an adhesive or the like.

A support portion 255 may be formed on the surface of the base 210 facing the terminal portion 253 on which the terminal 251 of the circuit board 250 is formed. The support portion 255 of the base 210 may be formed without steps with a constant cross-section from the outer surface of the base 210, may be protruding relative to the lower surface of the base 210, and may be formed on the circuit board 250. The terminal portion 253 can be supported.

An edge of the base 210 may have a second 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 second groove 212.

Additionally, seating grooves 215-1 and 215-2 in which the position sensor 240 can be placed may be provided on the upper surface of the base 210. According to the embodiment, two seating grooves 215-1 and 215-2 may be provided on the upper surface of the base 210, and the position sensor 240 may be positioned in the seating grooves 215-2 of the base 210. 1, 215-2), the displacement of the housing 140 in the second and third directions can be detected. To this end, 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 angle formed by the virtual lines may be 90°, but is not limited thereto.

For example, each of the seating grooves 215-1 and 215-2 of the base 210 may be arranged to be aligned at or near the center of the second coil 230, but is not limited thereto. Alternatively, the center of the second coil 230 and the center of the position sensor 240 may be aligned, but are not limited to this.

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

The 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 OA (eg, X-axis or Y-axis).

The position sensor 240 includes two OIS (Optical Image Stabilizer) position sensors 240a and 240b arranged to cross or be perpendicular to each other in order to detect the displacement of the housing 140 in a direction perpendicular to the optical axis (OA). can do.

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 may be bent from the upper surface and may include a plurality of terminals 251 that receive electrical signals from the outside, or at least one terminal portion 253 in which pins are formed. The embodiment includes two terminal portions bent from opposing sides of the upper surfaces of the two circuit boards 250, but is not limited thereto.

In FIG. 8, the second coil 230 is implemented in a form provided on a circuit member 231 separate from the circuit board 250, but 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 circuit member 231 on which the second coil 230 is provided may include a through hole 230a through which the support member 220 passes.

The second coil 230 is disposed on the upper part of the circuit board 250 to face the magnet 130 disposed or fixed to the housing 140.

The second coil 230 may include a plurality of Optical Image Stabilization (OIS) coils 230-1 to 230-4 corresponding to a plurality of magnets 130-1 to 130-4.

Each of the plurality of OIS coils 230-1 to 230-4 may correspond to or be aligned with one of the plurality of magnets 130-1 to 130-4 in the first direction.

For example, the plurality of OIS coils 230-1 to 230-4 may be disposed corresponding to the four sides of the circuit board 250, but this is not limited.

A driving signal may be provided from the circuit board 250 to each of the plurality of OIS coils 230-1 to 230-4. At this time, the driving signal may be an alternating current signal (eg, alternating current) or a direct current signal. For example, the driving signal provided to the plurality of OIS coils 230-1 to 230-4 may be a sinusoidal signal or a pulse signal (eg, a pulse width modulation (PWM) signal). Alternatively, in another embodiment, the driving signal applied to the plurality of OIS coils 230-1 to 230-4 may include an alternating current signal and a direct current signal.

In FIG. 8, the second coil 230 includes, but is limited to, two OIS coils 230-3 and 230-4 for the second direction and two OIS coils 230-3 and 230-4 for the third direction. This does not mean that, in another embodiment, the second coil may include one or more OIS coils for the second direction and one or more OIS coils for the third direction.

Electromagnetic force may be generated by the interaction of the magnets 130-1 to 130-4 and the plurality of OIS coils 230-1 to 230-4 arranged to face each other, and the housing 140 uses this electromagnetic force. ) may be performed by moving in the second and/or third direction.

Each of the OIS position sensors 240a and 240b may be provided as a Hall sensor, and any sensor that can detect the magnetic field strength can be used. For example, each of the OIS position sensors 240a and 240b may be implemented in the form of a driver including a Hall sensor, or may be implemented as a standalone position detection sensor such as a Hall sensor.

A plurality of terminals 251 may be installed in the terminal portion 253 of the circuit board 250. For example, external power is applied through a plurality of terminals 251 installed on the terminal portion 253 of the circuit board 250, and the first and second coils 120 and 230, and the first and second OIS position sensors Driving signals or power may be supplied to the sensors 240a and 240b, and output signals output from the first and second OIS position sensors 240a and 240b may be output to the outside.

According to the embodiment, the circuit board 250 may be provided 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.

The circuit board 250 may include through holes 250a1 and 250a2 through which the support member 220 can pass. The support member 220 may be electrically connected to a circuit pattern or pad disposed on the lower surface of the circuit board 250 through the through holes 250a1 and 250a2 of the circuit board 250, such as through soldering.

Alternatively, in another embodiment, the circuit board 250 may not have the through holes 250a1 and 250a2, and the support member 220 may be electrically connected to the circuit pattern formed on the upper surface of the circuit board 250 through soldering, etc. It may be possible.

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 coupled to each other and fixed by heat fusion or may be fixed with an adhesive member such as epoxy.

The second coil 230 may be disposed on the upper side of the circuit board 250, and the first and second OIS position sensors 240a and 240b may be disposed on the lower side.

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 circuit board 250 may include at least one terminal surface 253 bent from the upper surface, and a plurality of terminals 251 provided on the terminal surface 253. For example, the circuit board 250 may have terminal surfaces provided on each of two opposing sides of the upper surface, but is not limited to this.

For example, the circuit board 250 may include terminals electrically connected to the second coils 230-1 to 230-4.

The circuit board 250 may be a flexible printed circuit board (FPCB), but is not limited thereto, and the terminals of the circuit board 1250 may be formed using a surface electrode method on the surface of the PCB or the base 210. It may be possible.

The circuit board 250 may include through holes 250a1 and 250a2 through which the support members 220-1 to 220-4 pass. The support members 220 - 1 to 220 - 4 may be electrically connected to a circuit pattern disposed on the bottom of the circuit board 250 through the holes 250a1 and 250a2 of the circuit board 250 through soldering, etc.

Additionally, in another embodiment, the circuit board 250 may not have the through holes 250a1 and 250a2, and the support members 220-1 to 220-4 may have a circuit pattern formed on the upper surface of the circuit board 250 or It can also be electrically connected to the pad through soldering, etc.

The circuit board 250 may further include a through hole 250b that is coupled to and fixed to the upper support protrusion 217 of the base 210 through heat fusion or an adhesive member.

The second coil 230 is disposed on the upper surface of the circuit board 250 in correspondence with or aligned with the magnet 130. The number of second coils 230 may be one or more and may be the same as the number of magnets 130, but is not limited thereto.

For example, the second coil 230 may include a plurality of OIS coils 230-1 to 230-4 formed in a separate substrate 231 from the circuit board 250, but is not limited thereto. , In another embodiment, the OIS coils 230-1 to 230-4 may be arranged to be spaced apart from each other on the circuit board 250 without a separate board.

The OIS coils 230-1 to 230-4 may be electrically connected to the circuit board 1250. A driving signal, for example, a driving current, may be provided to each of the OIS coils 230-1 to 230-4.

The housing 140 is moved in the second and/or third directions by electromagnetic force caused by the interaction of the magnets 130 arranged to face or align with each other and the OIS coils 230-1 to 230-4 provided with driving signals. It can move, and hand shake correction can be performed by controlling the movement of the housing 140.

One end of the support member 220 may be coupled to the upper elastic member 150 by soldering or a conductive adhesive member, and the other end of the support member 220 may be coupled to the circuit board 250 or/and the base 210. You can.

The lens driving device 100 according to the embodiment shown in FIGS. 1 to 8 may further include an AF position sensor and a sensing magnet for AF feedback operation.

FIG. 9A shows a cross-sectional view of a lens driving device 100-1 according to another embodiment.

Referring to FIG. 9A, the embodiment 100-1 may further include an AF position sensor 170 and a sensing magnet 180 in the lens driving device 100.

The sensing magnet 180 may be placed on the bobbin 110 and spaced apart from the first coil 120. For example, the sensing magnet 180 may be placed on the first coil 120.

The AF position sensor 170 may be disposed in the housing 140 in response to the sensing magnet 180. For example, the AF position sensor 170 may overlap with the sensing magnet in a direction perpendicular to the optical axis.

The AF position sensor 170 can detect the strength of the magnetic field of the sensing magnet 180 as the bobbin 110 moves and generate an output signal, for example, an output voltage, according to the detection result. The displacement of the bobbin 110 in the optical axis (OA) direction may be adjusted using the output signal of the AF position sensor 170.

The AF position sensor 170 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.

The AF position sensor 170 may be electrically connected to at least one of the upper elastic member 150 or the lower elastic member 160, may be electrically connected to the circuit board through support members, and is driven from the circuit board 250. A signal may be provided, and the output signal of the AF position sensor 170 may be transmitted to the circuit board.

FIG. 9B shows a cross-sectional view of a lens driving device 100-2 according to another embodiment.

Referring to FIG. 9B, the lens driving device 100-2 is a modified example of FIG. 9A in which the sensing magnet 180 is disposed in the housing 140 and the AF position sensor 170 is disposed in the bobbin 110. . For example, the sensing magnet 180 may be placed in the housing 140 to be spaced apart from the magnet 130-1, and the AF position sensor 170 may be placed in the bobbin 110 to be spaced apart from the first coil 120. It can be.

In another embodiment, the sensing magnet 190 of FIG. 9B may be omitted, and the AF position sensor 170 may output an output according to the result of detecting the strength of the magnetic field of the magnet 130 according to the movement of the bobbin 110. It can also generate signals.

FIG. 10 shows a first bottom perspective view of the circuit board 250 according to an embodiment, FIG. 11 shows a second bottom perspective view of the circuit board 250 shown in FIG. 10, and FIG. 12 shows the terminal portion shown in FIG. 10. 253 shows a partially enlarged view, and FIG. 13 shows a cross-sectional view in the AB direction of the terminal portion 253 shown in FIG. 10.

10 to 13, the circuit board 250 includes a body 250a having a hollow body 250a disposed on the upper surface of the base 210, and at least one terminal portion 253 bent to the side of the base 210. ), at least one connection terminal (251-1 to 251-n, a natural number where n>1) disposed on the front side (25-1) of the terminal portion 253, and on the back side (25-2) of the terminal portion 253. It includes at least one dummy terminal (259-1 to 259-n, a natural number with n>1) disposed.

The connection terminals 251-1 to 251-n may be electrically connected to the first and second coils 120 and 230 and the first and second OIS position sensors 240a and 240b. In the case of an embodiment with an AF position sensor, the connection terminals 251-1 to 251-n may be electrically connected to the AF position sensor 170 of FIGS. 9A and 9B.

The circuit board 250 includes an insulating member 601, a first conductive layer 602a disposed on the upper surface of the insulating member 601, a first coating layer 603a disposed on the first conductive layer 602a, and an insulating member. It may include a second conductive layer 602b disposed on the lower surface of 601 and a second coating layer 603a disposed below the second conductive layer 602b.

The first conductive layer 602a may be a patterned metal layer, for example, a Cu plating layer. For example, the first conductive layer 602a includes wires and pads electrically connected to the support members 220-1 to 220-6, the second coil 230, and the second position sensor 240. It may be in a patterned form.

The connection terminals 251-1 to 251-n of the circuit board 250 are regions of the first conductive layer 602a exposed from the first coating layer 602a, and the first conductive layer 602a is a support member. It may be a portion electrically connected to a corresponding one of the fields 220-1 to 220-6, the second coil 230, and the second position sensor 240.

The insulating member 601 may be made of resin, for example, polyimide, but is not limited thereto.

The second conductive layer 602b may be a metal layer patterned to correspond to the connection terminals 251-1 to 251-n, for example, a Cu layer.

The dummy terminals 259-1 to 259-n of the circuit board 250 are regions of the second conductive layer 602b exposed by the second coating layer 602a, and are spaced apart from each other and electrically isolated.

Additionally, the dummy terminals 259-1 to 259-n of the circuit board 250 may be arranged to be spaced apart from the connection terminals 251-1 to 251-n.

The connection terminals 251-1 to 251-n of the terminal portion 253 of the lens driving device 100 are electrically connected to the pad of the camera module by soldering. However, since the insulating member 601 of the terminal portion 253 is not well coated with solder, the solderability between the connection terminals 251-1 to 251-n and the pad of the camera module is not good, resulting in a decrease in the bonding force between the two. This may worsen and connection failure may occur.

The dummy terminals 259-1 to 259-n may serve to improve the solderability of the connection terminals 251-1 to 251-n to prevent weakening of bonding force and connection defects.

The plurality of connection terminals 251-1 to 251-n may be arranged in a line on the front surface 25-1 of the terminal portion 253 in a direction parallel to the terminal portion 253, but are not limited thereto. For example, the plurality of connection terminals 251-1 to 251-n may be arranged in a row in the longitudinal direction 301 of the terminal portion 253.

In order to improve solderability with the camera module, one end of each of the plurality of connection terminals 251-1 to 251-n may contact one end of the front surface 25-1 of the terminal portion 253. For example, one end of the connection terminal may contact one end 601a of the insulating member 601 of the terminal portion 253.

Each of the plurality of dummy terminals 259-1 to 259-n is connected to a corresponding one of the plurality of connection terminals 251-1 to 251-n in a direction perpendicular to the front surface 25-1 of the terminal portion 253. It can be positioned to align with one.

For example, the virtual center line bisecting the connection terminal and the virtual second center line bisecting the dummy terminal may be aligned with or overlap each other in a direction perpendicular to the front surface 25-1 of the terminal portion 253.

For example, the plurality of dummy terminals 259-1 to 259-n may be arranged in a line on the back side 25-2 of the terminal portion 253 in a direction parallel to the terminal portion 253, but the present invention is not limited thereto. . For example, the plurality of dummy terminals 259-1 to 259-n may be arranged in a row in the longitudinal direction 301 of the terminal portion 253.

In order to improve the solderability of the connection terminals 251-1 to 251-n, at least a portion of the dummy terminals 259-1 to 259-n are connected in a direction perpendicular to the front surface 25-1 of the terminal portion 253. may overlap with the connection terminal.

In order to improve the solderability of the connection terminals 251-1 to 251-n, one end of each of the dummy terminals 259-1 to 259-n is connected to one end of the back side 25-2 of the terminal portion 253. You can access it. For example, one end of the dummy terminal may contact one end 601a of the insulating member 601 of the terminal portion 253.

The area of the dummy terminals 259-1 to 259-n may be smaller than the area of the connection terminals 251-1 to 251-n.

Since the connection terminals 251-1 to 251-n must be electrically connected by soldering, a certain area is required, but the dummy terminals 259-1 to 259-n improve solderability rather than electrical connection. Since it is for this purpose, it is not necessary to have the area of the connection terminal. Furthermore, if the area of the dummy terminals 259-1 to 259-n is larger than the area of the connection terminals 251-1 to 251-n, the terminal portion 253 As the thickness becomes thinner, the durability of the terminal portion 253 may be weakened.

Referring to FIG. 12, the length L2 of the dummy terminal (e.g., 259-3) in the longitudinal direction 301 of the terminal portion 253 is longer than the length (L1) of the corresponding connection terminal (e.g., 251-3). Short (L2<L1).

For example, the length L2 of the dummy terminal (eg, 259-3) may be 1/3 to 1/2 of the length L1 of the connection terminal 251-3. If L2 < L1/3, improvement in solderability of the connection terminal cannot be expected, and if L2 > L1/2, the durability of the terminal portion may be weakened and the terminal portion may be damaged.

10 and 11, the length (H2, see FIG. 11) of the dummy terminal (e.g., 259-1) in the direction perpendicular to the longitudinal direction 301 of the terminal portion 253 is the corresponding connection terminal ( 251-1) is shorter than the length (H1) (H2<H1). For example, the length (H1) of the connection terminal may be the largest value among the lengths from the top to the bottom.

For example, the length H2 of the dummy terminal (eg, 259-1) may be 1/4 to 1/3 of the length H1 of the connection terminal (eg, 251-1). If H2 < H1/4, improvement in solderability of the connection terminal cannot be expected, and if H2 > H1/3, the durability of the terminal portion 253 may be weakened and the terminal portion 253 may be damaged.

FIG. 14 shows a bottom perspective view of the base 210 according to an embodiment, and FIG. 15 shows a partially enlarged view of the base 210 of FIG. 14 combined with the circuit board 250.

Referring to FIGS. 14 and 15 , grooves 40-1 and 40-2 facing the dummy terminals 259-1 to 259-n may be provided at the bottom of the outer surface of the base 210.

For example, the grooves 40-1 and 40-2 may be provided at the bottom of the outer surface of the support portion 255 of the base 210.

Solder is permeated between the outer surface of the base 210 and the dummy terminals 259-1 to 259-n of the circuit board 250 by the grooves 40-1 and 40-2 of the base 210. Soldering can be facilitated because a space or gap can be secured.

For example, the separation distance D1 between the outer surface of the base 210 and the dummy terminals 259-1 to 259-n of the circuit board 250 may be 70 μm to 80 μm.

For example, the separation distance (D1, see FIG. 17) between the bottom of the groove 40-1 of the base and the dummy terminals 259-1 to 259-n of the circuit board 250 may be 70 μm to 80 μm. there is.

If the separation distance (D1) is less than 70㎛, sufficient space for the solder material to penetrate may not be secured, and solderability to the dummy terminal may deteriorate. In addition, if the separation distance (D2) exceeds 80㎛, the solder material may be separated from the outer surface of the base during soldering, and as a result, the solder material may not be supported by the outer surface of the base, which may result in poor solderability to the dummy terminal. there is.

For example, on the lower surface 210a of the base 210, the bottoms of the grooves 40-1 and 40-2 of the base 210 may be located on the same plane as the tops of the dummy terminals 259-1 to 259-n. However, it is not limited to this.

For example, the distance from the lower surface 210a of the base 210 to the bottom of the grooves 40-1 and 40-2 of the base 210 is the distance from the bottom to the top of the dummy terminals 259-1 to 259-n. It may be the same as This means that if the distance from the lower surface 210a of the base 210 to the bottom of the grooves 40-1 and 40-2 of the base 210 is too long, the support portion 255 of the base 210 may be damaged by the circuit board 9250. This is because the circuit board 250 may be bent because it cannot support.

The grooves 40-1 and 40-2 of the base 210 may have a single line shape disposed at the bottom of the outer surface of the support portion 255, but are not limited thereto.

In another embodiment, the base 210 may include a plurality of grooves spaced apart from each other, and the plurality of grooves may be provided at the bottom of the support portion 255 of the base 210 to correspond to one of the dummy terminals. and can be arranged in a row.

The lens driving device 100 according to the embodiment is provided with connection terminals and corresponding dummy terminals in the terminal portion 253 of the circuit board 250, thereby improving solderability when soldering to a camera module and preventing connection defects. You can.

Meanwhile, the lens driving device according to the above-described embodiment can be used in various fields, for example, camera modules or optical devices.

For example, the lens driving device 100 according to an 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, It may be included in an optical instrument for the purpose of recording and reproducing images by a lens, 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.

Figure 16 shows an exploded perspective view of the camera module 200 according to an embodiment.

Referring to FIG. 16, the camera module 200 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, It may include an image sensor 810, a motion sensor 820, a first control unit 830, and a connector 840.

A lens barrel 400 may be mounted on the bobbin 110 of the lens driving device 100. In another embodiment, the lens may be mounted directly on the bobbin 110.

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 above-described adhesive role, 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 in a specific frequency band from light passing through the lens or 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, a first control unit, etc. 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 may 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.

For example, the second holder 800 may include pads or terminals to which connection terminals provided on the terminal portion 253 of the circuit board 250 of the lens driving device 100 are bonded by soldering.

FIG. 17 shows solder 609 disposed between the terminal portion 253 of the lens driving device 100 and the pad 801 of the second holder 800 of the camera module 200 according to an embodiment.

Referring to FIG. 17, during the soldering process between the terminal portion 253 of the circuit board 250 of the lens driving device 100 and the pad 801 of the second holder 800 of the camera module 200, solder is used. may be well buried in the dummy terminal (eg, 259-6) and the corresponding connection terminal (eg, 251-6). That is, the solder 609 can contact both the dummy terminal (eg, 259-6) and the corresponding connection terminal (eg, 251-6).

Additionally, a portion of the solder 609 may be located between the dummy terminal (eg, 259-6) and the outer surface of the base 210.

For example, a portion of the solder 609 may be located within the grooves 40-1 and 40-2 of the base 210 and may contact the bottom and/or sidewalls of the grooves 40-1 and 40-2. .

As a result, the viscous soldering material easily remains between the end of the insulating member 601 and the pad 801, thereby improving the solderability between the connection terminal and the pad and preventing poor connection and weakening of the bonding force. can do.

The camera module 200 may further include an adhesive member 13 disposed between the lower surface of the circuit board and the base 210. For example, the adhesive member 13 may be made of a resin material such as epoxy, but is not limited thereto.

For example, the adhesive member 13 includes a first adhesive member 13a disposed between the back of the terminal portion 253 of the circuit board 250 and the outer surface of the base 210, the lower surface of the circuit board 250, and the base. It may include a second adhesive member 13a disposed between the upper surfaces of 210 .

For example, the first adhesive member 13 may be located on a portion of the solder 609 located within the grooves 40-1 and 40-2 of the base 210.

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 may be electrically connected to the first control unit 830 through circuit patterns or wires 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 motion sensor 820 may be configured separately from the first control unit 830, but is not limited thereto, and may be configured to be included in the first control unit 830 in another embodiment.

The first control unit 830 is mounted on the second holder 800 and includes the first coil 120 and the second coil 230 of the lens driving device 100, and the OIS position sensors 240a and 240b. Can be electrically connected.

For example, the second holder 800 may be electrically connected to the circuit board 250 of the lens driving device 100, and the first control unit 830 mounted on the second holder 800 may be connected to the circuit board 250. It may be electrically connected to the first coil 120, the second coil 230, and the OIS position sensors 240a and 240b through the terminals 251.

The first control unit 830 may include an AF driver, an OIS driver, first and second drivers, first and second amplifiers, and a servo control unit.

The AF driver provides a first driving signal that drives the first coil 120.

The OIS driver provides a second driving signal to drive the OIS coils 230-1 to 230-4.

The first driver provides a fourth driving signal for driving the first OIS position sensor 240a, and the second driver provides a fifth driving signal for driving the second OIS position sensor 240b.

The first amplifier amplifies the output signal of the first OIS position sensor 240a and outputs an amplified signal according to the amplification result, and the second amplifier unit amplifies the output signal of the second OIS position sensor 240b and amplifies it. Outputs an amplified signal according to the result.

The servo control unit outputs a second control signal for controlling the OIS driver based on the amplification signals of the first and second amplifier units and the rotational angular velocity information provided from the motion sensor 820, and performs an OIS feedback operation. can do.

In the case of a lens driving device including an AF position sensor, the first control unit 830 includes a third driver that provides a third driving signal for driving the AF position sensor 170, and the first position sensor 170. It may further include a third amplifier that amplifies the output signal and outputs an amplified signal different from the amplified result. Additionally, the servo control unit outputs a first control signal for controlling the AF driver based on the amplified signal of the third amplifier and the rotational angular velocity information provided from the motion sensor 820, and may perform an AF feedback operation.

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

FIG. 18 shows a block diagram of the image sensor 810 shown in FIG. 17 according to an embodiment.

Referring to FIG. 18, the image sensor 810 includes a sensing control unit 905, a pixel array 910, and an analog-digital converting block 920.

The sensing control unit 905 provides control signals (e.g., reset signal (RX), transmission signal (TX), selection signal (SX)) for controlling transistors included in the pixel array 120, and an analog-to-digital conversion block. Control signals (Sc) for controlling (130) are output.

The pixel array unit 910 includes a plurality of unit pixels (P11 to Pnm, natural numbers where n, m>1), and the plurality of unit pixels (P11 to Pnm) are a matrix consisting of rows and columns. ) can be arranged to have a shape. Each of the unit pixels (P11 to Pnm) may be a photoelectric conversion element that detects light and converts it into an electrical signal.

The pixel array 120 may include sensing lines connected to output terminals of unit pixels (P11 to Pnm).

For example, each of the unit pixels (P11 to Pnm) may include a photodiode, a transfer transistor, a reset transistor, a drive transistor, and a select transistor. It is not limited to this. The number of transistors included in a unit pixel is not limited to four, but may be three or five.

A photodiode can absorb light and generate charge by the absorbed light.

The transfer transistor may transmit charges generated by the photodiode to a sensing node (eg, a floating diffusion region) in response to the transmission signal TX. The reset transistor may reset the unit pixel in response to the reset signal RX. The drive transistor can be controlled in response to the voltage of the sense node, can be implemented as a source follower, and can act as a buffer. The select transistor can be controlled by the selection signal (SE) and output the detection signal (Va) to the output terminal of the unit pixel.

The analog-digital conversion block 920 samples the detection signal Va, which is an analog signal output from the pixel array unit 905, and converts the sampled detection signal into a digital signal Ds. The analog-to-digital conversion block 920 may perform correlated double sampling (CDS) to remove fixed pattern noise unique to a pixel.

The above-described sensing control unit 905 and analog-to-digital conversion block 920 may be implemented separately from the first control unit 830, but are not limited thereto. The sensing control unit 905, the analog-to-digital conversion block 920, and The first control unit 830 may be implemented as one control unit.

FIG. 19 shows a perspective view of a portable terminal 200A according to an embodiment, and FIG. 20 shows a configuration diagram of the portable terminal 200A shown in FIG. 19.

19 and 20, 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. 19 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 include the camera module 200 according to the embodiment shown in FIG. 16.

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

Additionally, the control unit 780 may include a display control unit 781 that generates display control signals for driving the display unit 751, and a camera control unit 782 that generates camera control signals for driving the camera 721. You can.

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.

Meanwhile, the lens driving device according to the above-described embodiment can be used in various fields, for example, camera modules or optical devices.

For example, the lens driving device 100 according to an 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, It may be included in an optical instrument for the purpose of recording and reproducing images by a lens, 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.

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: first magnet 140: housing
150: upper elastic member 160: lower elastic member
170: first position sensor 180: sensor substrate
190: second magnet 200: camera module
210: base 220: support member
230: second coil 240: second position sensor
250: circuit board 251-1 to 251-n: connection terminal
259-1 to 259-n: Dummy terminal 300: Cover member.

Claims (29)

housing;
a bobbin disposed inside the housing;
a first coil disposed on the bobbin;
A magnet disposed in the housing;
a base disposed below the housing; and
It includes a first circuit board disposed on the upper surface of the base,
The first circuit board is,
a body disposed on the upper surface of the base;
a terminal portion connected to the body and disposed on an outer surface of the base;
at least one connection terminal disposed on the front of the terminal unit and electrically connected to the first coil; and
It includes at least one dummy terminal disposed on the back of the terminal portion,
The terminal portion of the first circuit board,
absence of insulation;
a first conductive layer disposed on the upper surface of the insulating member;
a second conductive layer disposed on the lower surface of the insulating member;
a first coating layer disposed on the first conductive layer; and
It includes a second coating layer disposed on the second conductive layer,
The at least one connection terminal is a region of the first conductive layer exposed from the first coating layer, and the at least one dummy terminal is a region of the second conductive layer exposed from the second coating layer. According to paragraph 1,
The lens driving device wherein the at least one dummy terminal overlaps the at least one connection terminal in a direction perpendicular to the front surface of the terminal unit. According to paragraph 1,
The first circuit board may include a plurality of connection terminals and a plurality of dummy terminals, and the plurality of dummy terminals are spaced apart from each other. According to paragraph 1,
A first driving signal is supplied to the first coil,
A lens driving device in which the bobbin moves in the optical axis direction due to interaction between the first coil and the magnet. According to paragraph 1,
The at least one dummy terminal is in contact with the bottom of the back of the terminal unit. According to paragraph 1,
A lens driving device in which the area of the dummy terminal is smaller than the area of the connection terminal. According to paragraph 1,
A lens driving device wherein the length of the dummy terminal in the longitudinal direction of the terminal portion is shorter than the length of the connection terminal in the longitudinal direction of the terminal portion. According to paragraph 1,
A lens driving device wherein a length of the dummy terminal in a direction perpendicular to the longitudinal direction of the terminal portion is shorter than a length of the connection terminal in a direction perpendicular to the longitudinal direction of the terminal portion. According to paragraph 1,
The base is a lens driving device including a groove facing the dummy terminal at the bottom of the outer surface. According to clause 9,
The base includes a support portion supporting the terminal portion of the first circuit board on an outer surface, and the groove is disposed at a lower end of the outer surface of the support portion. According to clause 9,
The groove is a lens driving device in the shape of a line formed at the bottom of the outer surface of the support. According to clause 9,
A lens driving device wherein the bottom of the groove is located on the same plane as the top of the dummy terminal. According to paragraph 1,
It includes a second coil disposed on the first circuit board and to which a second driving signal is applied,
A lens driving device in which the housing is moved by interaction between the second coil and the magnet. According to clause 12,
Elastic members coupled to the bobbin and the housing; and
A lens driving device further comprising support members connecting the elastic members and the first circuit board. According to paragraph 1,
A lens driving device in which a virtual first center line bisecting the connection terminal and a virtual second center line bisecting the dummy terminal overlap each other in a direction perpendicular to the front surface of the terminal portion. According to clause 5,
A lens driving device wherein one end of the connection terminal is in contact with a lower end of the front surface of the terminal portion. According to paragraph 3,
Each of the plurality of dummy terminals is disposed to correspond to one of the plurality of connection terminals. According to paragraph 1,
A lens driving device wherein a gap exists between the at least one dummy terminal and an outer surface of the base. According to clause 18,
A lens driving device wherein the separation distance between the at least one dummy terminal and the outer surface of the base is 70㎛ to 80㎛. housing;
a bobbin disposed inside the housing;
a first coil disposed on the bobbin;
A magnet disposed in the housing;
a base disposed below the housing; and
It includes a first circuit board disposed on the upper surface of the base,
The first circuit board is,
a body disposed on the upper surface of the base;
a terminal portion connected to the body and disposed on an outer surface of the base;
at least one connection terminal disposed on the front of the terminal unit and electrically connected to the first coil; and
At least one dummy terminal disposed on the back of the terminal unit,
A lens driving device wherein the length of the dummy terminal in the longitudinal direction of the terminal portion is shorter than the length of the connection terminal in the longitudinal direction of the terminal portion. housing;
a bobbin disposed inside the housing;
a first coil disposed on the bobbin;
A magnet disposed in the housing;
a base disposed below the housing; and
It includes a first circuit board disposed on the upper surface of the base,
The first circuit board is,
a body disposed on the upper surface of the base;
a terminal portion connected to the body and disposed on an outer surface of the base;
at least one connection terminal disposed on the front of the terminal unit and electrically connected to the first coil; and
At least one dummy terminal disposed on the back of the terminal unit,
A lens driving device wherein a length of the dummy terminal in a direction perpendicular to the longitudinal direction of the terminal portion is shorter than a length of the connection terminal in a direction perpendicular to the longitudinal direction of the terminal portion. housing;
a bobbin disposed inside the housing;
a first coil disposed on the bobbin;
A magnet disposed in the housing;
a base disposed below the housing; and
It includes a first circuit board disposed on the upper surface of the base,
The first circuit board is,
a body disposed on the upper surface of the base;
a terminal portion connected to the body and disposed on an outer surface of the base;
at least one connection terminal disposed on the front of the terminal unit and electrically connected to the first coil; and
At least one dummy terminal disposed on the back of the terminal unit,
The base is a lens driving device including a groove facing the at least one dummy terminal at a bottom of an outer surface. housing;
a bobbin disposed inside the housing;
a first coil disposed on the bobbin;
A magnet disposed in the housing;
a base disposed below the housing; and
It includes a first circuit board disposed on the upper surface of the base,
The first circuit board is,
a body disposed on the upper surface of the base;
a terminal portion connected to the body and disposed on an outer surface of the base;
at least one connection terminal disposed on the front of the terminal unit and electrically connected to the first coil; and
At least one dummy terminal disposed on the back of the terminal unit,
A lens driving device in which a virtual first center line bisecting the connection terminal and a virtual second center line bisecting the dummy terminal overlap each other in a direction perpendicular to the front surface of the terminal portion. lens;
a lens driving device according to any one of claims 1 to 23 that moves the lens; and
A camera module containing an image sensor. According to clause 24,
a second circuit board including at least one pad; and
The camera module further includes solder that attaches at least one connection terminal of the first circuit board and at least one pad of the second circuit board to each other. According to clause 25,
The solder is in contact with the at least one connection terminal and the at least one dummy terminal. According to clause 25,
A portion of the solder is located between the dummy terminal and the outer surface of the base. According to clause 27,
Further comprising an adhesive member disposed between the outer surface of the base and the back side of the terminal portion of the circuit board,
The adhesive member is a camera module located on a portion of the solder. An optical device comprising the camera module according to claim 24.

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