KR20230163090A - Lens driving device, camera module and optical apparatus - Google Patents

Abstract

A lens driving device according to an embodiment includes a housing; a driving magnet disposed in the housing; a bobbin disposed inside the housing and moving in the optical axis direction within the housing; and a driving coil disposed on the bobbin and facing the driving magnet, wherein the driving coil includes: a first coil disposed on the bobbin and opposing the driving magnet in a first direction perpendicular to the optical axis direction; and a second coil disposed on the bobbin together with the first coil and corresponding to the driving magnet in the first direction, wherein the first coil and the second coil are not directly electrically connected to each other.

Description

Lens driving device, camera module and optical device {LENS DRIVING DEVICE, CAMERA MODULE AND OPTICAL APPARATUS}

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

As various types of portable terminals become widespread and wireless Internet services become commercialized, consumer demands related to portable terminals are also diversifying, and various types of additional devices are being installed on portable terminals.

Among them, a representative one is a camera module that takes photos or videos of a subject. Meanwhile, recent camera modules are equipped with an autofocus function that automatically adjusts focus depending on the distance to the subject. In addition, a hand shake correction function that corrects the user's hand shake is also applied.

Additionally, as the adoption of high-pixel image sensors increases, the weight and size of the lens also increases. Accordingly, the driving force of the driving unit that moves the lens to the target position must also be increased.

The driving unit includes a coil. And the lens can move in the optical axis direction by the driving force provided by the coil.

However, there is a limit to the driving force provided by the coil, depending on the maximum current intensity that can be applied by the driver IC and the resistance that increases in proportion to the number of turns of the coil.

Accordingly, when the driving force of the lens is secured by increasing the number of turns of one coil, a problem occurs in which the driving force of the driving unit cannot be sufficiently secured due to the resistance of the coil. And when the driving force is not secured, there is a problem of not securing a sufficient amount of movement of the lens.

Accordingly, there is a need for a new lens driving device that can secure a sufficient amount of movement of the lens while improving the driving force of the lens.

(Patent Document 1) KR 10-1204161 B

Embodiments provide a lens driving device, a camera module, and an optical device that can improve the driving force of the driving unit.

Additionally, the embodiment provides a lens driving device, a camera module, and an optical device that can secure a sufficient amount of movement of the lens.

The technical problems to be solved in the embodiments are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

A lens driving device according to an embodiment includes a housing; a driving magnet disposed in the housing; a bobbin disposed inside the housing and moving in the optical axis direction within the housing; and a driving coil disposed on the bobbin and facing the driving magnet, wherein the driving coil includes: a first coil disposed on the bobbin and opposing the driving magnet in a first direction perpendicular to the optical axis direction; and a second coil disposed on the bobbin together with the first coil and corresponding to the driving magnet in the first direction, wherein the first coil and the second coil are not directly electrically connected to each other.

Additionally, a groove in which the first coil and the second coil are accommodated is formed on the outer peripheral surface of the bobbin.

Additionally, the groove includes a first groove in which the first coil is accommodated, and a second groove in which the second coil is accommodated, and is spaced apart from the first groove in the optical axis direction.

Additionally, the first coil is disposed on the outer peripheral surface of the bobbin, and the second coil is disposed on the outer peripheral surface of the first coil to overlap the first coil in the first direction.

Additionally, the first coil, the second coil, and the driving magnet are aligned in the first direction.

Additionally, each of the first coil and the second coil is arranged to overlap the outer peripheral surface of the bobbin in the optical axis direction.

Additionally, the driving magnet includes a first area overlapping the first coil in the first direction, a second area overlapping the second coil in the first direction, and the first area and the first area. Area 2 extends in the direction of the optical axis.

Additionally, the first coil includes a first lead line and a second lead line, the second coil includes a third lead line and a fourth lead line, and the first and second lead lines include the first lead line and the second lead line. It is not directly electrically connected to the 3rd and 4th lead lines.

Additionally, the first coil receives a first current from one of the first and second lead lines, the second coil receives a second current from one of the third and fourth lead lines, and the second coil receives a second current from one of the third and fourth lead lines. 1 Current is provided to the first coil without going through the second coil, and the second current is provided to the second coil without going through the first coil.

In addition, the lens driving device further includes a substrate disposed below the bobbin and electrically connected to the first coil and the second coil, wherein the substrate is connected to the first coil and generates the first current. It includes a first terminal that provides to the first coil, and a second terminal that is connected to the second coil and provides the second current to the second coil.

Additionally, the intensity of the first current is different from the intensity of the second current.

In addition, the lens driving device further includes a driving element disposed on the substrate, wherein the driving element determines the intensity of the first current to be applied to the first coil and the second current to be applied to the second coil. The intensity is calculated, and the first and second currents corresponding to the calculated intensity are supplied individually to the first coil and the second coil.

In addition, the driving coil further includes a third coil that is not electrically connected to the first and second coils, and the driving element supplies individual first to third currents to the first to third coils, respectively. , the bobbin is moved in the optical axis direction.

In addition, the driving coil further includes third and fourth coils that are not electrically connected to the first and second coils, and the driving element includes: a first driving element connected to the first and second coils; and a second driving element connected to the third and fourth coils, wherein the first driving element supplies individual first and second currents to the first and second coils, and the second driving element Individual third and fourth currents are supplied to the third and fourth coils, and the bobbin moves in the optical axis direction by a driving force corresponding to the first to fourth currents supplied to the first to fourth coils. .

The embodiment can increase the driving force for moving the lens module, and further secure the amount of movement of the lens module.

To this end, embodiments include a first coil and a second coil disposed together on a bobbin and receiving separate currents from each other. And in the embodiment, the lens module may be moved in response to a third driving force that is the sum of a first driving force corresponding to the current applied to the first coil and a second driving force corresponding to the current applied to the second coil. .

For example, in the comparative example, the lens module is moved using one coil or two or more coils electrically connected to each other. At this time, in order to secure the amount of movement of the lens module, the number of coil turns must increase, and the intensity of the current applied to the coil must accordingly increase. However, in the comparative example, as the number of coil turns increases, coil resistance increases, and thus the maximum current intensity that can be applied to the coil decreases. Therefore, in the comparative example, if the number of turns of the coil exceeds a certain limit, there is a problem in which the movement amount of the lens module cannot be secured.

In contrast, in the embodiment, the lens module is moved using a first coil and a second coil that are electrically separated from each other and receive individual currents. Accordingly, the embodiment can reduce the resistance of the first coil and the second coil, and thereby increase the maximum current intensity that can be applied to the first and second coils. As a result, the embodiment can secure a driving force that is more than twice that of the comparative example, and thus the amount of movement of the lens module can be increased.

1 is a perspective view of a camera module according to an embodiment.
Figure 2 is a cross-sectional view taken in the direction AA' of the camera module of Figure 1.
Figure 3 is an exploded perspective view of the camera module of Figure 1.
Figure 4 is an exploded perspective view of the lens driving device of Figure 3.
Figure 5 is a plan view of the driving unit according to the first embodiment.
Figure 6 is a diagram for explaining the relationship between the number of turns of a coil and the maximum current intensity of the coil.
Figure 7 is a diagram for explaining the relationship between the amount of movement of the lens module according to the number of turns of the coil.
Figure 8 is a diagram comparing the movement amount of the lens module of the embodiment and the movement amount of the lens module of the comparative example.
Figure 9 is a block diagram showing the configuration of a camera module according to an embodiment.
10 and 11 are flowcharts for step-by-step explaining an AF driving method of a camera module according to an embodiment.
Figure 12 shows a mobile terminal to which a camera module according to an embodiment is applied.
Figure 13 is a perspective view of a vehicle to which a camera module according to an embodiment is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

However, the technical idea of the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and as long as it is within the scope of the technical idea of the present invention, one or more of the components may be optionally used between the embodiments. It can be used by combining and replacing.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention, unless explicitly specifically defined and described, are generally understood by those skilled in the art to which the present invention pertains. It can be interpreted as meaning, and the meaning of commonly used terms, such as terms defined in a dictionary, can be interpreted by considering the contextual meaning of the related technology.

Additionally, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular may also include the plural unless specifically stated in the phrase, and when described as "at least one (or more than one) of A and B and C", it is combined with A, B, and C. It can contain one or more of all possible combinations.

Additionally, when describing the components of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and are not limited to the essence, sequence, or order of the component. And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also is connected to the other component. It may also include cases where other components are 'connected', 'coupled', or 'connected' by another component between them.

Additionally, when described as being formed or disposed "above" or "below" each component, "above" or "below" refers not only to cases where two components are in direct contact with each other, but also to one This also includes cases where another component described above is formed or placed between two components. In addition, when expressed as "top (above) or bottom (bottom)", it can include not only the upward direction but also the downward direction based on one component.

The optical axis direction used below can be defined as the optical axis direction of the lens coupled to the camera module, and the vertical direction can be defined as the direction perpendicular to the optical axis.

The 'optical axis direction' used below is defined as the optical axis direction of the lens module included in the camera module. Meanwhile, 'optical axis direction' can be used interchangeably with 'up/down direction', 'z-axis direction', etc.

Additionally, the 'autofocus function' used below is defined as a function that allows a clear image of a subject to be obtained on an image sensor. For example, the 'autofocus function' is defined as a function that automatically focuses on the subject by moving the lens module in the optical axis direction to adjust the distance to the image sensor according to the distance to the subject. Meanwhile, 'Auto Focus' can be used interchangeably with 'AF (Auto Focus)'.

In addition, the 'handshake correction function' used below is defined as a function that moves or tilts the lens module in a direction perpendicular to the optical axis to offset vibration (movement) generated in the image sensor by external force. Meanwhile, 'image stabilization' can be used interchangeably with 'OIS (Optical Image Stabilization)'.

Before explaining the embodiment of the present invention, the configuration of the optical device according to the embodiment will be described.

Optical devices include any of mobile phones, mobile phones, smart phones, portable smart devices, digital cameras, laptop computers, digital broadcasting terminals, PDAs (Personal Digital Assistants), PMPs (Portable Multimedia Players), and navigation devices. It can be. However, the type of optical device is not limited to this, and any device for taking videos or photos can be called an optical device.

The optical device may include a main body (not shown), a camera module, and a display unit (not shown). However, in the optical device, one or more of the main body, camera module, and display unit may be omitted or changed.

The body can form the appearance of the optical device. As an example, the main body may include a rectangular parallelepiped shape. As another example, the main body may be formed to be rounded at least in part. The main body can accommodate a camera module. A display unit may be disposed on one side of the main body. For example, a display unit and a camera module may be disposed on one side of the main body, and a camera module may be additionally disposed on the other side of the main body (a side located opposite the one side).

The camera module may be placed in the main body of the optical device. The camera module may be placed on one side of the main body. At least a portion of the camera module may be accommodated inside the main body. A plurality of camera modules may be provided. A plurality of camera modules may be disposed on one side of the main body and the other side of the main body, respectively. The camera module can capture images of a subject.

The display unit may be placed in the main body. The display unit may be placed on one side of the main body. That is, the display unit may be placed on the same side as the camera module. Alternatively, the display unit may be placed on the other side of the main body. The display unit may be placed on a side of the main body opposite to the side where the camera module is placed. The display unit can output images captured by the camera module.

FIG. 1 is a perspective view of a camera module according to an embodiment, FIG. 2 is a cross-sectional view in the A-A' direction of the camera module of FIG. 1, FIG. 3 is an exploded perspective view of the camera module of FIG. 1, and FIG. 4 is a lens of FIG. 3. It is an exploded perspective view of the driving device, and Figure 5 is a plan view of the driving part according to the first embodiment.

Hereinafter, the overall configuration of the camera module of the embodiment will be described with reference to FIGS. 1 to 5.

Prior to description of the embodiment, one of the first driving coil 222, the driving magnet 232, and the second driving coil 242 will be referred to as a 'first driving unit', and the other will be referred to as a 'second driving unit', The remaining one can be referred to as the 'third driving unit'. Meanwhile, the first driving coil 222 may be referred to as an 'AF coil', the second driving coil 242 may be referred to as an 'OIS coil', and the driving magnet 232 may be referred to as a 'common magnet'. You can. Meanwhile, the first driving coil 222, the driving magnet 232, and the second driving coil 242 may be arranged with their positions changed.

Additionally, the camera module of the embodiment may include a plurality of magnets. One of the plurality of magnets may include the driving magnet 232. Additionally, the camera module may include a sensing magnet 271 and a compensation magnet 272.

At this time, one of the driving magnet 232, the sensing magnet 271, and the compensation magnet 272 is called a 'first magnet', the other is called a 'second magnet', and the remaining one is called a 'third magnet'. It can be called '.

The camera module of the embodiment includes a lens module 100, a lens driving device 200, a driving substrate unit 300, a filter unit 400, and a connection unit 500.

The driving substrate unit 300 may include a second substrate 310, an image sensor 320, a second terminal unit 330, a first element 340, and a second element 350. The first element 340 may be a driver element, and the second element 350 may be a motion sensor. The driving substrate unit 300 may also be referred to as a ‘second substrate unit’.

Meanwhile, the camera module of the embodiment is said to include a lens module 100, a lens driving device 200, a driving substrate unit 300, a filter unit 400, and a connection unit 500, but any one or more of these is omitted. Or it may change.

The lens module 100 may include a lens 120 and a lens barrel 110. The lens module 100 may include at least one lens 120 and a lens barrel 110 that accommodates the lens 120. However, the configuration of the lens module 100 is not limited to the lens barrel 110. For example, one configuration of the lens module 100 may be any holder structure capable of supporting one or more lenses 120.

The lens module 100 may be coupled to the inside of the lens driving device 200.

The lens module 100 may be coupled to the bobbin 221 of the lens driving device 200. The lens module 100 may be moved together with the bobbin 221 of the lens driving device 200. For example, the lens module 100 may move integrally with the bobbin 221 of the lens driving device 200.

As an example, the lens module 100 may be coupled to the bobbin 221 by an adhesive (not shown). As another example, the lens module 100 may be screw-coupled with the bobbin 221. Meanwhile, light passing through the lens module 100 may be irradiated to the image sensor 320 of the driving substrate unit 300.

The filter unit 400 may block light in the infrared region from being incident on the image sensor 320. The filter unit 400 may include a base 410 and an infrared filter 420. Additionally, the filter unit 400 may include an adhesive member 430.

The infrared filter 420 may be disposed between the lens module 100 and the image sensor 320. The base 410 of the filter unit 400 may be disposed between the lens module 100 and the image sensor 320. And the infrared filter 420 may be mounted on the base 410. For example, the infrared filter 420 may be mounted in the through hole 411 of the base 410. The infrared filter 420 may be made of a film material or a glass material. The infrared filter 420 may be formed by coating an infrared blocking coating material on a flat optical filter, such as a cover glass for protecting an imaging surface. For example, the infrared filter 420 may be an infrared absorption filter that absorbs infrared rays. As another example, the infrared filter 420 may be an infrared reflection filter that reflects infrared rays. This filter unit 400 may be disposed on the driving substrate unit 300. Preferably, the filter unit 400 may be disposed on the second substrate 310 of the driving substrate unit 300.

Meanwhile, the lens driving device 200 may be disposed on the driving substrate unit 300 and the filter unit 400. Preferably, the lens driving device 200 may be disposed on the filter unit 400. As an example, the filter unit 400 includes an adhesive member 430 disposed on the upper surface of the base 410. And the holder 243 of the lens driving device 200 may be fixed on the filter unit 400 through the adhesive member 430. However, the embodiment is not limited to this.

Preferably, the driving substrate unit 300 may be disposed below the filter unit 400. And the lens driving device 200 may be disposed on top of the filter unit 400.

The filter unit 400 may be coupled to the driving substrate unit 300, and the lens driving device 200 may be coupled to the filter unit 400.

The driving substrate unit 300 includes a second substrate 310. An image sensor 320 may be disposed on the second substrate 310. The second substrate 310 may be electrically connected to the image sensor 320.

At this time, the filter unit 400 and the lens driving device 200 may accommodate the image sensor 320 inside. Through this structure, light passing through the lens module 100 coupled to the lens driving device 200 can be irradiated to the image sensor 320 mounted on the second substrate 310 of the driving substrate 300. there is. The second substrate 310 may supply power (eg, current) to the lens driving device 200.

Meanwhile, a first element 340, which is a control element for controlling the lens driving device 200, may be disposed on the second substrate 310, but is not limited thereto. For example, the first element 340 may be disposed on the first substrate 241 of the lens driving device 200 instead of the second substrate 310. Additionally, a second element 350, which is a motion sensor for determining control conditions of the lens driving device 200, may be disposed on the second substrate 310.

The image sensor 320 may be disposed on the second substrate 310 of the driving substrate unit 300. The image sensor 320 may be electrically connected to the second substrate 310. For example, the image sensor 320 may be coupled to the second substrate 310 using surface mounting technology (SMT). As another example, the image sensor 320 may be coupled to the second substrate 310 using flip chip technology. The image sensor 320 may be arranged so that its optical axis coincides with that of the lens module 100. That is, the optical axis of the image sensor 320 and the optical axis of the lens module 100 may be aligned. Through this, the image sensor 320 can acquire light that has passed through the lens module 100. The image sensor 320 can convert light irradiated to the effective image area into an electrical signal. The image sensor 320 may be one of a charge coupled device (CCD), a metal oxide semiconductor (MOS), a CPD, and a CID. However, the type of the image sensor 320 is not limited to this, and the image sensor 320 may include any configuration that can convert incident light into an electrical signal.

The first element 340 may be disposed on the second substrate 310 . For example, the first element 340 may be disposed outside the lens driving device 200 on the second substrate 310 . However, the embodiment is not limited to this, and the first element 340 may be disposed inside the lens driving device 200 on the second substrate 310.

The second substrate 310 may include a second terminal portion 330. The second terminal portion 330 may be disposed on the upper surface of the second substrate 310.

The second terminal portion 330 may be disposed around the image sensor 320 on the second substrate 310 . The second terminal portion 330 may include a plurality of second terminals. For example, the second terminal unit 330 may include a plurality of second terminals electrically connected to the first substrate 241 of the lens driving device 200.

For example, a plurality of first terminals (not shown) may be disposed on the first substrate 241. Additionally, the first terminals of the first substrate 241 and the plurality of second terminals of the second substrate 310 may be electrically connected through the connection portion 500. The connection part 500 may be solder, but is not limited thereto.

The plurality of first terminals and the plurality of second terminals may be connected to each other 1:1.

Each of the plurality of first terminals and the plurality of second terminals may include a power terminal, a clock terminal, an OIS driving terminal, a Hall sensor terminal, and a ground terminal. For example, the second substrate 310 may be connected to the second driving coil 242 disposed on the first substrate 241. At this time, the second driving coil 242 includes a 2-1 driving coil (not shown) for driving in the x-axis direction and a 2-2 driving coil (not shown) for driving in the y-axis. can do. Additionally, the lens driving device 200 may include a first sensor unit (not shown) and a second sensor unit (not shown) for detecting the position of the housing 231 or the bobbin 221.

And each of the plurality of first terminals and the plurality of second terminals is a terminal connected to one end of the 2-1 driving coil, a terminal connected to the other end of the 2-1 driving coil, and a terminal connected to the 2-2 driving coil. A terminal connected to one end of the terminal, a terminal connected to the other end of the 2-2 driving coil, an SDA terminal for transmitting a data signal, an SCL terminal for transmitting a clock signal, a VDD terminal for transmitting VDD power, and VSS for transmitting VSS power. It may include terminals.

Furthermore, each of the plurality of first terminals and the plurality of second terminals includes a terminal connected to a first input terminal of the first sensor unit, a first output terminal (for example, a positive terminal) of the first sensor unit, and A terminal connected, a terminal connected to the second output terminal (e.g., negative terminal) of the first sensor unit, a terminal connected to the first input terminal of the second sensor unit, and a first output terminal of the second sensor unit ( For example, a terminal connected to a positive terminal), a terminal connected to a second output terminal (for example, a negative terminal) of the second sensor unit, and a common connection with the second input terminals of the first and second sensor units. It may include a terminal for connection, and a terminal for ground.

The second terminal portion 330 may be formed of a metal material with high electrical conductivity in order to transmit electrical signals. For example, the second terminal portion 330 is at least one selected from gold (Au), silver (Ag), platinum (Pt), titanium (Ti), tin (Sn), copper (Cu), and zinc (Zn). It can be formed from a metal material. For example, the second terminal portion 330 may be formed of copper (Cu), which has high electrical conductivity and is relatively inexpensive. The second terminal unit 330 is manufactured using typical printed circuit board manufacturing processes such as the additive process, subtractive process, MSAP (Modified Semi Additive Process), and SAP (Semi Additive Process) methods. It is possible to form

The first element 340 may also be called a ‘driving element’, a ‘control element’, or a ‘control unit’ that drives or controls the lens driving device 200.

The first element 340 can individually control the direction, intensity, and amplitude of the current supplied to the first driving coil 222 and the second driving coil 242 of the lens driving device 200. However, the intensity of the current supplied to the first driving coil 222 may be controlled by a Hall driver element (not shown).

The first element 340 may control the lens driving device 200 to perform one or more of the autofocus function and the camera shake correction function of the camera module. That is, the first element 340 can control the lens driving device 200 to move the lens module 100 in the optical axis direction, or in a direction perpendicular to the optical axis direction, or to tilt the lens module 100. Furthermore, the first element 340 may perform one or more of feedback control of the autofocus function and feedback control of the hand shake correction function.

For example, the first element 340 receives the position of the bobbin 221 or the housing 231 detected by a first sensor unit (not shown) and controls the current applied to the first driving coil 222. can do. Through this, the first element 340 can perform autofocus feedback control. In addition, the first element 340 may control the current applied to the second driving coil 242 by receiving the position of the bobbin 221 or the housing 231 detected by the second sensor unit (not shown). there is. Through this, the first element 340 can perform hand shake correction feedback control.

At this time, feedback control by the first element 340 occurs in real time, and thereby more precise autofocus and hand shake correction functions can be performed.

The second device 350 may be disposed on the second substrate 310 to be spaced apart from the first device 340 . The second element 350 may be a motion sensor. For example, the second element 350 may detect rotational angular velocity information resulting from movement of the camera module. The second element 350 may be implemented as a 2-axis or 3-axis gyro sensor, or an angular velocity sensor.

Additionally, the driving substrate unit 300 includes a connector 360. The connector 360 may be placed on the second substrate 310 . For example, the connector 360 may be electrically connected to the second board 310. The connector 360 may include a port that is electrically connected to an external device (eg, an optical device). The connector 360 may transmit the image signal obtained from the image sensor 320 to the optical device. Additionally, the connector 360 may transmit signals transmitted from the optical device to the first element 340 disposed on the second substrate 310.

Meanwhile, the lens driving device 200 includes a cover member 210, a first movable member 220, a second movable member 230, a stator 240, a first support member 250, and a second support member 260. ), and sensor units (not shown).

However, the lens driving device 200 includes a cover member 210, a first movable member 220, a second movable member 230, a stator 240, a first support member 250, and a second support member 260. ), and any one or more of the sensor units may be omitted or changed. In particular, the sensor units are configured for autofocus feedback control and image stabilization feedback control, and one or more of them may be omitted.

The cover member 210 may form the exterior of the lens driving device 200. The cover member 210 may have a hexahedral shape with an open bottom. However, the shape of the cover member 210 is not limited to this. Cover member 210 may be a non-magnetic material. If the cover member 210 is made of a magnetic material, the magnetic force of the cover member 210 may affect one or more of the driving magnet 232, the sensing magnet 271, and the compensation magnet 272. The cover member 210 may be formed of a metal material.

The cover member 210 may be made of a metal plate. In this case, the cover member 210 can block electro-magnetic interference (EMI). Accordingly, the cover member 210 may be referred to as an 'EMI shield-can'. The cover member 210 may block radio waves generated outside the lens driving device 200 from flowing into the cover member 210. Additionally, the cover member 210 may block radio waves generated inside the cover member 210 from being emitted to the outside of the cover member 210.

The cover member 210 may include an upper plate 211 and a side plate 212. The cover member 210 may include an upper plate 211 and a side plate 212 extending downward from the outer periphery of the upper plate 211. The cover member 210 may be coupled to the holder 243. A portion of the side plate 212 of the cover member 210 may be coupled to the holder 243.

The inner surface of the side plate 212 of the cover member 210 may be in direct contact with the outer surface of the holder 243. The inner surface of the side plate 212 of the cover member 210 may be coupled to the holder 243 with an adhesive (not shown).

The internal space formed by the cover member 210 and the holder 243 includes a first movable member 220, a second movable member 230, a stator 240, a first support member 250, and a second support member. (260) can be placed. Through this structure, the cover member 210 can protect internal components from external impact and simultaneously prevent penetration of external contaminants.

Cover member 210 may include an opening 213. The opening 213 may be formed in the upper plate 211 of the cover member 210. The opening 213 may expose the lens module 100 to the upper side. The opening 213 may be formed in a shape corresponding to the lens module 100. The size of the opening 213 may be larger than the diameter of the lens module 100 so that the lens module 100 can be assembled through the opening 213. Light introduced through the opening 213 may pass through the lens module 100. At this time, the light passing through the lens module 100 may be converted into an electrical signal in the image sensor and obtained as an image.

The first mover 220 may be combined with the lens module 100. The first mover 220 may accommodate the lens module 100 inside. The outer peripheral surface of the lens module 100 may be coupled to the inner peripheral surface of the first mover 220 . The first mover 220 may move through interaction with the second mover 230 and/or the stator 240. At this time, the first mover 220 can move integrally with the lens module 100. Meanwhile, the first mover 220 can move for the autofocus function. At this time, the first mover 220 may be referred to as an 'AF mover'. However, this is not limited to the first movable member 220 being a member that moves only for the autofocus function. The first mover 220 can also move for the hand shake correction function.

The first mover 220 may include a bobbin 221 and a first driving coil 222. However, in the first mover 220, one or more of the bobbin 221 and the first driving coil 222 may be omitted or changed. The first driving coil 222 may be an AF coil. The first driving coil 222 includes a plurality of AF coils. Specifically, the first driving coil 222 may include a first coil 222a and a second coil 222b. The first coil 222a may be referred to as a first AF coil. And the second coil 222b can be called a second AF coil.

The bobbin 221 may be placed inside the housing 231. The bobbin 221 may be placed in a through hole (not shown) of the housing 231.

The bobbin 221 may move in the optical axis direction with respect to the housing 231. The bobbin 221 may be placed in a through hole (not shown) of the housing 231 to move along the optical axis. The bobbin 221 may be combined with the lens module 100. The outer peripheral surface of the lens module 100 may be coupled to the inner peripheral surface of the bobbin 221. A first driving coil 222 may be coupled to the bobbin 221. A first driving coil 222 may be coupled to the outer peripheral surface of the bobbin 221. The lower part of the bobbin 221 may be coupled to the lower support member 252. The upper part of the bobbin 221 may be coupled to the upper support member 251. That is, the first coil 222a and the second coil 222b of the first drive coil 222 may be coupled to the outer peripheral surface of the bobbin 221.

The bobbin 221 may include a through hole (not shown). And the lens module 100 may be placed in the through hole of the bobbin 221. For example, the lens module 100 may be screwed into the through hole of the bobbin 221. Alternatively, the lens module 100 may be coupled to the through hole of the bobbin 221 with an adhesive.

A first driving coil 222 may be coupled to the bobbin 221. For this purpose, the bobbin 221 may include a groove (not shown) in which a portion of the outer peripheral surface is recessed inward. And the first driving coil 222 can be accommodated in the groove.

An upper support member 251 may be coupled to the upper surface of the bobbin 221. For this purpose, a coupling protrusion (not shown) to which the upper support member 251 is coupled may be formed on the upper side of the bobbin 221.

Additionally, a lower support member 252 may be coupled to the lower surface of the bobbin 221.

The first driving coil 222 may be disposed on the bobbin 221. The first driving coil 222 may be disposed on the outer peripheral surface of the bobbin 221. The first driving coil 222 may be directly wound around the bobbin 221. The first driving coil 222 may be formed in a groove formed on the outer peripheral surface of the bobbin 221.

That is, the first coil 222a and the second coil 222b of the first driving coil 222 may be formed in a groove formed on the outer surface of the bobbin 221. At this time, the first coil 222a and the second coil 222b may be formed within one groove formed in the bobbin 221.

Alternatively, the outer peripheral surface of the bobbin 221 may include a plurality of grooves spaced apart in the optical axis direction. Additionally, the first coil 222a and the second coil 222b may each be inserted into the plurality of grooves.

The first driving coil 222 may face the driving magnet 232. In this case, when current is supplied to the first driving coil 222 and a magnetic field is formed around the first driving coil 222, electromagnetic interaction between the first driving coil 222 and the driving magnet 232 The first driving coil 222 may move with respect to the driving magnet 232. The first driving coil 222 may electromagnetically interact with the driving magnet 232. The first driving coil 222 may move the bobbin 221 in the optical axis direction with respect to the housing 231 through electromagnetic interaction with the driving magnet 232. The first driving coil 222 may include a plurality of coils spaced apart from each other. That is, the first driving coil 222 may include a first coil 222a and a second coil 222b that are not directly electrically connected to each other.

The first driving coil 222 may include a pair of lead lines for power supply. At this time, a pair of lead lines of the first driving coil 222 may be electrically connected to the upper support member 251. That is, the first driving coil 222 can receive power through the upper support member 251. As another example, a pair of lead lines of the first driving coil 222 may be electrically connected to the lower support member 252.

A detailed description of the first driving coil 222 is as follows.

The first driving coil 222 includes a first coil 222a and a second coil 222b.

And each of the first coil 222a and the second coil 222b may include a pair of lead lines.

For example, the first coil 222a may include a first lead line 222a1 and a second lead line 222a2. The first lead line 222a1 may be one end of the first coil 222a. And the second lead line 222a2 may be the other end opposite to the one end of the first coil 222a. However, the embodiment is not limited to this. For example, the first lead line 222a1 may be a separate wire connected to one end of the first coil 222a. Additionally, the second lead line 222a2 may be a separate wire connected to the other end of the first coil 222a.

Additionally, the second coil 222b may include a third lead line 222b1 and a fourth lead line 222b2. The third lead line 222b1 may be one end of the second coil 222b. Additionally, the fourth lead line 222b2 may be the other end of the second coil 222b opposite to the one end. However, the embodiment is not limited to this. For example, the third lead line 222b1 may be a separate wire connected to one end of the second coil 222b. Additionally, the fourth lead line 222b2 may be a separate wire connected to the other end of the second coil 222b.

At this time, the first coil 222a and the second coil 222b are not electrically connected to each other. That is, the first coil 222a and the second coil 222b are not directly electrically connected to each other. Through this, current can be supplied individually to the first coil 222a and the second coil 222b. At this time, the intensity and direction of the current applied to the first coil 222a and the second coil 222b may be the same, or alternatively, at least one of the intensity and direction may be different.

That is, the first lead line 222a1 and the second lead line 222a2 of the first coil 222a are the third lead line 222b1 and the fourth lead line 222b2 of the second coil 222b. not connected to each other For example, the first lead line 222a1 and the second lead line 222a2 of the first coil 222a, and the third lead line 222b1 and the fourth lead line (222b1) of the second coil 222b ( 222b2) may be individually connected to the port of the first element 340. For example, the first element 340 includes two first ports respectively connected to the first lead line 222a1 and the second lead line 222a2 of the first coil 222a. For example, the first element 340 includes two second ports respectively connected to the third lead line 222b1 and the fourth lead line 222b2 of the second coil 222b.

As a result, the first coil 222a and the second coil 222b can receive individual currents rather than common currents. For example, the first element 340 may supply individual currents to the first coil 222a and the second coil 222b through the first port and the second port.

In an embodiment, the lens module 100 may be moved in the optical axis direction through electromagnetic interaction between the first coil 222a and the driving magnet 232. Additionally, the embodiment may move the lens module 100 in the optical axis direction through electromagnetic interaction between the second coil 222b and the driving magnet 232. For example, the first coil 222a provides a first driving force to move the lens module 100. For example, the second coil 222b provides a second driving force to move the lens module 100. And in the embodiment, AF operation may be performed by moving the lens module 100 in the optical axis direction by the sum of the first driving force and the second driving force. However, the embodiment is not limited to this. For example, the first element 340 may supply current to only one of the first coil 222a and the second coil 222b. In this case, the lens module 100 can only move with the driving force provided by either the first coil 222a or the second coil 222b. At this time, the first coil 222a and the second coil 222b 2 The coil 222b may be arranged in a direction perpendicular to the optical axis in the bobbin 221. That is, the first coil 222a is disposed on the outer peripheral surface of the bobbin 221. Additionally, the second coil 222b may be arranged to surround the outer peripheral surface of the first coil 222a. In this case, the driving magnet 232 may include an area that commonly overlaps with the first coil 222a and the second coil 222b in a direction perpendicular to the optical axis. For example, the first coil 222a, the second coil 222b, and the driving magnet 232 may be aligned in a direction perpendicular to the optical axis.

However, the embodiment is not limited to this.

In the second embodiment, the first coil 222a and the second coil 222b may be arranged in the optical axis direction.

For example, the first coil 222a may be wound in a first area of the outer peripheral surface of the bobbin 221 in a horizontal direction perpendicular to the optical axis direction.

Additionally, the second coil 222b may be wound in a horizontal direction perpendicular to the optical axis direction in a second area of the outer peripheral surface of the bobbin 221 spaced apart from the first coil 222a. In this case, the driving magnet 232 may include a first area that overlaps the first coil 222a in a direction perpendicular to the optical axis. Additionally, the driving magnet 232 may include a second area that overlaps the second coil 222b in a direction perpendicular to the optical axis. And the first and second areas of the driving magnet 232 may be located in the optical axis direction.

To summarize, the first coil 222a, the second coil 222b, and the driving magnet 232 of the first embodiment may be arranged in a direction perpendicular to the optical axis.

Differently, the first coil 222a and the second coil 222b of the second embodiment may be arranged in the optical axis direction, and the driving magnet 232 is connected to the first coil 222a and the second coil 222b. Each may be arranged in a direction perpendicular to the optical axis direction.

To this end, the first coil 222a and the second coil 222b may have a structure in which the outer surface of an electrically conductive metal wire is coated with an insulating material or covered with an insulating layer.

The first coil 222a and the second coil 222b may be wound multiple times and arranged in a spiral shape. The spiral shape may mean that the windings overlap in a direction perpendicular to the optical axis (for example, horizontally or horizontally). The first coil 222a and the second coil 222b may be formed of Litz wire or enamel copper wire.

That is, referring to FIG. 5, the first coil 222a and the second coil 222b in the first embodiment may be arranged on the bobbin 221 in a direction perpendicular to the optical axis. For example, the first coil 222a may be wound and disposed on the outer peripheral surface of the bobbin 221 in a direction perpendicular to the optical axis. Additionally, the second coil 222b may be wound and disposed on the outer peripheral surface of the first coil 222a in a direction perpendicular to the optical axis.

A first current may be supplied to at least one of the first lead line 222a1 and the second lead line 222a2 of the first coil 222a. Additionally, a second current may be supplied to at least one of the third lead line 222b1 and the fourth lead line 222b2 of the second coil 222b.

Through this, the embodiment provides driving force that can secure the movement amount of the lens module 100.

At this time, when the first coil 222a and the second coil 222b are electrically connected to each other, the first current may be applied to the first coil 222a. And the second coil 222b can receive the first current from the first coil 222a. However, as will be explained below, as the number of turns (eg, number of turns) of the coil increases, the resistance of the coil increases. Accordingly, when the resistance increases, the intensity of current that can be applied to the coil decreases. That is, the maximum current intensity that can be applied to the coil is limited, and the maximum current intensity decreases in inverse proportion to the resistance of the coil. Accordingly, even if the number of turns of the coil is increased, the driving force generated by the coil does not increase due to the limitation of the maximum current intensity due to the increase in coil resistance.

Accordingly, in the embodiment, in order to minimize the resistance of the coil, the first driving coil 222 is separated into a first coil 222a and a second coil 222b. And in the embodiment, individual currents are supplied to the separated first coil 222a and the second coil 222b. Through this, in the embodiment, the lens is generated by the sum of the first driving force caused by the first current supplied to the first coil 222a and the second driving force caused by the second current supplied to the second coil 222b. Allows the module 100 to move.

Meanwhile, in the above description, it is said that the first drive coil 222 for AF driving of the lens module 100 includes a first coil 222a and a second coil 222b that are separated from each other, but it is not limited thereto.

For example, the first driving coil 222 may be divided into three or more pieces. For example, the first device 340 may be a 6-channel IC. In this case, the first driving coil 222 may be divided into three coils. In addition, the first element 340 may supply individual currents to each of the three coils based on the total driving force corresponding to the movement amount of the lens module 100. Additionally, the embodiment may control AF driving of the lens module 100 using a plurality of first elements 340. For example, the first element 340 may include a 1-1 element and a 1-2 element. Additionally, the 1-1 element and the 1-2 element may each be a 4-channel IC. In this case, the first driving coil 222 may be divided into four pieces. For example, the first driving coil 222 may include first to fourth coils. Also, among the first to fourth coils, the first and second coils may be connected to the 1-1 element. Also, the remaining third and fourth coils among the first to fourth coils may be connected to the first-second element. The 1-1 element may supply individual currents to the first and second coils. Additionally, the first and second elements may supply individual currents to the third and fourth coils. Accordingly, the lens module can move by the first to fourth driving forces supplied by the first to fourth coils, respectively.

Meanwhile, the number of channels of the first element 340 of the embodiment, the number of first elements used for AF driving, and the number of separated coils of the first driving coil 222 may further increase depending on the embodiment. , it may decrease differently.

At this time, when the first driving coil 222 includes three or more coils, the three or more coils may be aligned and disposed in the optical axis direction on the outer surface of the bobbin 221.

Alternatively, when the first driving coil 222 includes three or more coils, the three or more coils may be aligned and arranged on the outer surface of the bobbin 221 in a direction perpendicular to the optical axis.

Alternatively, when the first driving coil 222 includes three or more coils, at least two of the three or more coils are aligned on the outer surface of the bobbin 221 in a direction perpendicular to the optical axis direction. , at least one other coil may be aligned with the at least two coils on the outer surface of the bobbin 221 in the optical axis direction.

Hereinafter, the first element 340 will be described as consisting of one 4-channel IC, and the first driving coil 222 will include first and second coils 222a and 222b.

Through this, the embodiment improves the driving force by the first driving coil 222 and further ensures the movement amount of the lens module 100.

The second movable member 230 may accommodate at least a portion of the first movable member 220 inside. The second movable member 230 may move the first movable member 220 or may move together with the first movable member 220 . The second movable member 230 can move through interaction with the stator 240. The second movable member 230 can move for the hand shake correction function. At this time, the second mover 230 may be called an 'OIS mover'. The second movable member 230 may move integrally with the first movable member 220 when moving for the camera shake correction function.

The second mover 230 may include a housing 231 and a driving magnet 232. However, in the second mover 230, one or more of the housing 231 and the driving magnet 232 may be omitted or changed.

The housing 231 may be disposed outside the bobbin 221. The housing 231 may accommodate at least a portion of the bobbin 221 inside. For example, the housing 231 may have a hexahedral shape. The housing 231 may include four sides and four corner portions disposed between the four sides. A driving magnet 232 may be disposed in the housing 231. For example, a driving magnet 232 may be disposed on each of the four sides of the housing 231. As another example, a driving magnet 232 may be disposed at each of the four corners of the housing 231. At least a portion of the outer peripheral surface of the housing 231 may be formed in a shape corresponding to the inner peripheral surface of the cover member 210. In particular, the outer peripheral surface of the housing 231 may be formed in a shape corresponding to the inner peripheral surface of the side plate 212 of the cover member 210. The housing 231 may be formed of an insulating material. The housing 231 may be formed of a different material from the cover member 210.

An upper support member 251 may be coupled to the upper part of the housing 231. A lower support member 252 may be coupled to the lower part of the housing 231.

Additionally, a first sensor unit and/or a second sensor unit may be disposed in the housing 231.

For example, the first sensor unit 270 may include a sensing magnet 271, a compensation magnet 272, and a first Hall sensor (not shown).

The driving magnet 232 may be disposed in the housing 231. The driving magnet 232 may be disposed outside the first driving coil 222. The driving magnet 232 may face the first driving coil 222. The driving magnet 232 may electromagnetically interact with the first driving coil 222. For example, the driving coil 222 may electromagnetically interact with the first coil 222a and the second coil 222b of the first driving coil 222, respectively.

Additionally, the driving magnet 232 may be disposed above the second driving coil 242. The driving magnet 232 may face the second driving coil 242. The driving magnet 232 may electromagnetically interact with the second driving coil 242. The driving magnet 232 can be commonly used for the autofocus function and anti-shake function. However, the driving magnet 232 may include a plurality of magnets used separately for the autofocus function and the anti-shake function. For example, the driving magnet 232 may be placed on the side of the housing 231. At this time, the driving magnet 232 may be a flat magnet. The driving magnet 232 may have a flat plate shape. As another example, the driving magnet 232 may be disposed at a corner of the housing 231. At this time, the driving magnet 232 may be a corner magnet. The driving magnet 232 may have a hexahedral shape with an inner side wider than an outer side. The driving magnet 232 may include a plurality of magnets spaced apart from each other. The driving magnet 232 may include four magnets spaced apart from each other. At this time, the four magnets may be arranged in the housing 231 so that the two neighboring magnets form an angle of 90° to each other. That is, the driving magnets 232 may be disposed at equal intervals on the four sides of the housing 231.

The stator 240 may be disposed on the lower side of the housing 231. The stator 240 may be disposed below the second movable member 230 .

The stator 240 may face the second movable member 230 . The stator 240 may support the second movable member 230 movably. The stator 240 may move the second movable member 230. At this time, the first mover 220 may also move together with the second mover 230.

The stator 240 may include a first substrate 241, a second driving coil 242, and a holder 243. However, in the stator 240, one or more of the first substrate 241, the second driving coil 242, and the holder 243 may be omitted or changed. The stator 240 may also be referred to as a second substrate portion.

The first substrate 241 may supply power to the second driving coil 242. The first substrate 241 may be combined with the second driving coil 242. The first substrate 241 may be coupled to the base 410 of the filter unit 400 disposed below the holder 243. The first substrate 241 may be disposed on the lower surface of the second driving coil 242. The first substrate 241 may be placed on the upper surface of the holder 243. The first substrate 241 may be disposed between the second driving coil 242 and the holder 243.

The first substrate 241 may include a flexible printed circuit board (FPCB). The first substrate 241 may be bent in some parts.

For example, the first substrate 241 may include a first substrate area disposed on the holder 243. Additionally, the first substrate 241 may include a second substrate region (not shown) bent at at least one end of the first substrate region and extending downward. A first terminal portion (not shown) may be formed in the second substrate area of the first substrate 241. For example, the first terminal portion may be aligned with the second terminal portion of the second board.

An opening may be formed in the first substrate area of the first substrate 241. The opening may be aligned with the lens module 100 and the image sensor 320 along the optical axis. The opening may be formed in the center of the first substrate area of the first substrate 241. The opening may be formed to penetrate the first substrate area of the first substrate 241 . The opening may pass light that has passed through the lens module 100. The opening may be formed in a circular shape, but is not limited thereto.

At least one through hole (not shown) may be formed in the first substrate area of the first substrate 241. The through hole may be formed in a corner or corner of the first substrate area of the first substrate 241 . The through hole 241-12 may be a through hole through which the second support member 260 passes.

The first substrate 241 may be placed on the holder 243. The second driving coil 242 may be disposed on the first substrate 241 . The second driving coil 242 may be disposed on the top surface of the first substrate 241. The second driving coil 242 may be disposed below the driving magnet 232. The second driving coil 242 may be disposed between the driving magnet 232 and the holder 243. A second support member 260 may be coupled to the first substrate 241.

The second driving coil 242 may sequentially receive power through the second substrate 310 and the first substrate 241. The second driving coil 242 may face the driving magnet 232. In this case, when current is supplied to the second driving coil 242 and a magnetic field is formed around the second driving coil 242, electromagnetic interaction between the second driving coil 242 and the driving magnet 232 The driving magnet 232 may move with respect to the second driving coil 242. The second driving coil 242 may electromagnetically interact with the driving magnet 232. The second driving coil 242 may move the housing 231 and the bobbin 221 with respect to the holder 243 in a direction perpendicular to the optical axis through electromagnetic interaction with the driving magnet 232.

The first support member 250 may be coupled to the bobbin 221 and the housing 231. The first support member 250 may elastically support the bobbin 221. The first support member 250 may have elasticity at least in part. At this time, the first support member 250 may be referred to as a ‘first elastic member’. The first support member 250 may support the bobbin 221 movably. The first support member 250 may support the bobbin 221 so that it can move in the optical axis direction with respect to the housing 231. That is, the first support member 250 can support the bobbin 221 to drive AF. At this time, the first support member 250 may be called an ‘AF support member’. The first support member 250 may include an upper support member 251 and a lower support member 252. However, in the first support member 250, one or more of the upper support member 251 and the lower support member 252 may be omitted or changed.

The upper support member 251 may be disposed above the bobbin 221 and coupled to the bobbin 221 and the housing 231. The upper support member 251 may be coupled to the bobbin 221 and the housing 231. The upper support member 251 may be coupled to the upper part of the bobbin 221 and the upper part of the housing 231. The upper support member 251 can elastically support the bobbin 221. The upper support member 251 may have elasticity at least in part. In this case, the upper support member 251 may be referred to as an ‘upper elastic member’. The upper support member 251 may support the bobbin 221 movably. The upper support member 251 can support the bobbin 221 so that it can move in the optical axis direction with respect to the housing 231. The upper support member 251 may be formed of a leaf spring.

The lower support member 252 may be disposed below the bobbin 221 and coupled to the bobbin 221 and the housing 231. The lower support member 252 may be coupled to the bobbin 221 and the housing 231. The lower support member 252 may be coupled to the lower part of the bobbin 221 and the lower part of the housing 231. The lower support member 252 can elastically support the bobbin 221. The lower support member 252 may have elasticity at least in part. In this case, the lower support member 252 may be referred to as a ‘lower elastic member’. The lower support member 252 can movably support the bobbin 221. The lower support member 252 can support the bobbin 221 so that it can move in the optical axis direction with respect to the housing 231. The lower support member 252 may be formed of a leaf spring.

The second support member 260 may support the housing 231 movably. The second support member 260 may elastically support the housing 231. The second support member 260 may have elasticity at least in part. At this time, the second support member 260 may be referred to as a ‘second elastic member’. For example, the second support member 260 may support the housing 231 to be movable in a direction perpendicular to the optical axis with respect to the stator 240. At this time, the bobbin 221 can move integrally with the housing 231. As another example, the second support member 260 may tiltably support the housing 231 with respect to the stator 240. That is, the second support member 260 can support the housing 231 and the bobbin 221 to drive OIS. At this time, the second support member 260 may be referred to as an ‘OIS support member’. For example, the second support member 260 may be formed of wire. Additionally, the second support member 260 may be electrically connected to the first substrate 241. Through this, the second support member 260 can receive power from the first substrate 241 and transmit it. For example, the second support member 260 may electrically connect the first substrate 241 and the third substrate 280.

The first sensor unit 270 may be provided for autofocus feedback. The first sensor unit 270 may detect movement of the bobbin 221 in the optical axis direction. The first sensor unit 270 may detect the amount of movement of the bobbin 221 in the optical axis direction and provide the information to the first element 340 in real time. The first sensor unit 270 may include a first Hall sensor (not shown), a sensing magnet 271, and a compensation magnet 272.

Additionally, the camera module may further include a second sensor unit (not shown). The second sensor unit may include a second Hall sensor. The second sensor unit may be provided for image stabilization feedback. In this case, the second sensor unit may be referred to as an 'OIS feedback sensor'. The second sensor unit may detect movement of the housing 231. The second sensor unit may detect movement or tilt of the housing 231 and/or the bobbin 221 in a direction perpendicular to the optical axis. The second sensor unit can detect the driving magnet 232. The second sensor unit may detect the driving magnet 232 disposed in the housing 231. The second sensor unit can detect the position of the housing 231. The second sensor unit can detect the amount of movement of the housing 231 in a direction perpendicular to the optical axis.

The lens driving device 200 may further include a third substrate 280. The third substrate 280 may be electrically connected to the first substrate 241. For example, the third substrate 280 may be electrically connected to the first driving coil 222. The third substrate 280 may supply power to the first driving coil 222. At this time, the third substrate 280 may be electrically connected to at least one of the first support member 250 and the second support member 260. Accordingly, the power provided from the first substrate 241 to the third substrate 280 is supplied to the first driving coil 222 via at least one of the first support member 250 and the second support member 260. can be supplied.

Meanwhile, the filter unit 400 includes a base 410, an infrared filter 420, and an adhesive member 430.

The base 410 may be placed below the lens driving device 200.

The base 410 may include a through hole 411. The base 410 may have a seating portion 412 formed around the through hole 411.

Additionally, an adhesive member 430 may be disposed on the upper surface of the base 410. The adhesive member 430 may couple the lens driving device 200 to the base 410 . Preferably, the adhesive member 430 may couple the holder 243 of the lens driving device 200 to the base 410.

Additionally, adhesive may be applied to the seating portion 412 of the base 410. Through this, the infrared filter 420 can be placed on the seating portion 412 of the base 410. The seating portion 412 may be in the form of a recess, cavity, or hole recessed from the upper surface of the base 410, but is not limited thereto. For example, the seating portion 412 may be a protrusion protruding from the upper surface of the base 410.

The seating portion 412 of the base 410 may serve to prevent the lower end of the lens module 100 from contacting or colliding with the infrared filter 420.

At this time, the seating portion 412 may be formed along the side of the infrared filter 420. For example, the seating portion 412 may be formed to surround the side of the infrared filter 420.

The shape of the seating portion 412 viewed from above may match the shape of the infrared filter 420, but is not limited thereto. The shape of the seating portion 412 in another embodiment may be similar to or different from the shape of the infrared filter 420.

The base 410 may include a through hole 411. The through hole 411 allows light passing through the infrared filter 420 to be incident on the image sensor 320. The through hole 411 may pass through the center of the base 410. The area of the through hole 411 may be smaller than the area of the infrared filter 420.

The base 410 is disposed on the second substrate 310 of the driving substrate unit 300. Additionally, the base 410 can accommodate an infrared filter 420 therein. Additionally, the base 410 may support the lens driving device 200 located on the upper side.

Hereinafter, an AF driving method of the camera module of the embodiment will be described.

FIG. 6 is a diagram for explaining the relationship between the number of turns of the coil and the maximum current intensity of the coil, FIG. 7 is a diagram for explaining the relationship between the amount of movement of the lens module according to the number of turns of the coil, and FIG. 8 is a view showing a lens of an embodiment. This is a diagram comparing the movement amount of the module and the movement amount of the lens module in the comparative example.

Referring to Figures 6 to 8, the relationship between the number of coil turns, the maximum current intensity that can be applied to the coil, and the amount of movement of the lens module is described as follows.

First, the driving force (eg, driving force for AF driving) generated by the first driving coil 222 and the driving magnet 232 is expressed in Equation 1 below.

[Equation 1]

Driving power = current * number of coil turns * magnetic field

Coil resistance ∝Number of coil turns

In other words, the driving force is determined by the current intensity, number of coil turns, and magnetic field intensity. At this time, as the number of turns of the coil increases, the resistance value of the coil increases. As a result, the intensity of the current has a constant value, but when the resistance value of the coil increases and reaches a limit value, it decreases in inverse proportion to the resistance value.

The solid line graph in FIG. 6 shows the current intensity that can be applied to the coil according to the number of coil turns when using the first driving element whose maximum current intensity is not limited. And, the dotted line graph in FIG. 6 shows the current intensity that can be applied to the coil according to the number of coil turns of the second driving element (for example, an element whose maximum output current intensity is limited to 160 mA).

At this time, coil resistance increases according to the number of turns of the coil, and as a result, the maximum current intensity that can be applied to the coil decreases in inverse proportion to the number of turns of the coil.

For example, as shown in the solid line graph of FIG. 6, when using the first driving element, the maximum current intensity when the number of coil turns is 20 is about 280 mA.

However, as with the second driving element, the maximum current intensity is generally limited to 160mA. Accordingly, when using the second driving element as shown in the dotted line graph of FIG. 6, the maximum current intensity that can be applied to the coil until the number of coil turns is 40 is limited to 160 mA.

In other words, when using the first driving element and the number of turns of the coil is small, the maximum current intensity that can be applied to the coil decreases in inverse proportion to the number of turns of the coil.

Differently, when the second driving element is used and the number of turns of the coil is less than a certain number (for example, less than 42 turns), the maximum current intensity is limited to 160 mA. Also, when using the second driving element, when the number of turns of the coil exceeds the predetermined number of turns, the maximum current intensity decreases in inverse proportion to the number of coil turns, as shown in the solid line graph of FIG. 6.

Specifically, referring to FIG. 7 , in the comparative example, a sufficient amount of movement of the lens module 100 may not be secured due to the resistance of the coil.

The solid line graph in FIG. 7 shows the movement amount when using the first driving element, and the dotted line graph shows the movement amount when using the second driving element.

Referring to FIG. 7, when the number of turns of the coil is small (for example, 42 turns or less), the movement amount when using the first driving element may be larger than the movement amount when using the second driving element. . However, when the number of turns of the coil exceeds a certain limit, the maximum current intensity of the first and second driving elements is limited due to resistance depending on the number of turns of the coil. Accordingly, when the number of turns of the coil exceeds a certain limit, the movement amount when using the first driving element and the movement amount when using the second driving element become the same.

In conclusion, when the number of turns of the coil is increased to secure the amount of movement, the maximum current intensity that can be applied to the coil decreases due to the coil resistance that increases in proportion to the number of turns of the coil. Accordingly, when the number of turns of the coil is unconditionally increased, a sufficient amount of movement of the lens module 100 may not be secured.

Therefore, in the embodiment, the first driving coil 222 is separated from the first coil 222a and the second coil 222b, and the first coil 222a and the second coil 222b are connected to each other. Supply individual current. Through this, the embodiment minimizes the increase in resistance according to the number of turns of the coil and ensures a sufficient amount of movement of the lens module 100.

Specifically, referring to FIG. 8, the embodiment allows the first driving coil 222 to include a first coil 222a and a second coil 222b that are electrically separated from each other and receive individual driving currents. Through this, the embodiment ensures the movement amount of the lens module 100 while maximizing the driving force.

For example, assuming that the number of turns of the first coil 222a is 35, the number of turns of the second coil 222b is 35, and the maximum current intensity of the second driving element is limited to 160 mA,

In the embodiment, the maximum current intensity that can be applied to the first coil (222a) is 160 mA, and the maximum current intensity that can be applied to the second coil (222b) is also 160 mA. Accordingly, theoretically, the embodiment can provide driving force corresponding to 320mA.

On the other hand, when the first coil 222a and the second coil 222b are electrically connected to each other as in the comparative example, the first coil 222a and the second coil 222b each have 35 turns. However, as they are electrically connected to each other, it corresponds to having one coil with 75 turns. Accordingly, in the comparative example, the maximum current intensity that can be applied to the coil is limited to 100 mA. Accordingly, in the comparative example, when using the first and second coils connected to each other, a driving force corresponding to 100 mA can be provided.

For example, even if the total number of coil turns of the first driving coil in the embodiment and the comparative example are the same, the embodiment may separate the first driving coil into a plurality of coils to reduce its resistance value. Accordingly, even if the total number of coil turns of the first driving coil is the same, the movement amount of the lens module 100 in the embodiment may increase by more than twice compared to the movement amount of the lens module in the comparative example. The increase in the amount of movement may correspond to an increase in the driving force provided by the first driving coil 222.

For example, in the comparative example, AF is driven using one driving coil having 40 turns or two driving coils having 20 turns electrically connected to each other. In contrast, in the embodiment, the AF is driven by allowing two coils with 20 turns to be electrically separated from each other and receive individual currents. Accordingly, the embodiment can approximately double the amount of movement of the lens module 100 depending on the number of coil turns compared to the comparative example.

Hereinafter, the AF driving operation of the camera module according to the embodiment will be described.

FIG. 9 is a block diagram showing the configuration of a camera module according to an embodiment, and FIGS. 10 and 11 are flowcharts for step-by-step explaining an AF driving method of a camera module according to an embodiment.

Referring to FIG. 9, the camera module of the embodiment includes an image sensor 10, an image signal processing unit 20, a display unit 30, a sensor unit 40, a first driving coil 50, a storage unit 60, and Includes a control unit 70.

As described above, the image sensor 10 processes the optical image of the subject captured through the lens. To this end, the image sensor 10 may process image information acquired through the lens. Additionally, the image sensor 10 may convert the processed image information into electrical data and output it.

The image sensor 10 has a plurality of photodetectors integrated into each pixel, and converts image information of the subject into electrical data and outputs it. The image sensor 10 accumulates the amount of input light and outputs the image captured by the lens according to the accumulated amount of light in accordance with the vertical synchronization signal. At this time, image acquisition is performed by the image sensor 10, which converts light reflected from the subject into an electrical signal. Meanwhile, a color filter is required to obtain a color image using the image sensor 10, and for example, a CFA (Color Filter Array) filter may be employed. CFA passes only light representing one color per pixel, has a regularly arranged structure, and has various forms depending on the arrangement structure.

The image signal processing unit 20 processes images output through the image sensor 10 on a frame-by-frame basis. At this time, the image signal processing unit 20 may also be referred to as an Image Signal Processor (ISP).

At this time, the image signal processing unit 20 may include a lens shading compensation unit (not shown). The lens shading compensation unit is a block for compensating for the lens shading phenomenon that appears differently in the amount of light in the center and edge areas of the image. It receives the lens shading setting value from the control unit 70, which will be described later, and adjusts the color of the center and edge areas of the image. Compensate.

Furthermore, the lens shading compensator may receive shading variables set differently depending on the type of lighting, and process lens shading of the image according to the received variables. Accordingly, the lens shading compensator may perform lens shading processing by applying a different degree of shading depending on the type of lighting. Meanwhile, the lens shading compensation unit receives shading variables set differently according to the automatic exposure weight applied to a specific area of the image to prevent saturation occurring in the image, and adjusts lens shading of the image according to the received variable. You can also process it. More specifically, the lens shading compensation unit compensates for brightness changes that occur in the edge area of the image signal as automatic exposure weight is applied to the center area of the image signal. That is, when saturation of the image signal occurs due to lighting, the intensity of light decreases from the center to the outside in a concentric circle shape, and the lens shading compensation unit amplifies the edge signal of the image signal to compensate for the brightness compared to the center. do.

Meanwhile, the image signal processor 20 can measure the clarity of the image acquired through the image sensor 10. That is, the image signal processor 20 may measure the sharpness of the image acquired through the image sensor 10 in order to check the focus accuracy of the image. The sharpness can be measured for each image acquired according to the position of the focus lens.

The display unit 30 displays captured images under the control of the control unit 70, which will be described later, and displays a settings screen required when taking a photo or a screen for selecting an action by the user.

The sensor unit 40 can detect the position of the lens module 100. And the sensor unit 40 may output position information for determining the current to be applied to the first driving coil 50. The sensor unit 40 may be a Hall sensor, but is not limited thereto.

The first driving coil 50 moves the lens module 100. The first driving coil 50 corresponds to the first driving coil 222 described in the lens driving device.

Accordingly, the first driving coil 50 includes a first coil 51 and a second coil 52.

The storage unit 60 stores data necessary for the camera module to operate. In particular, the storage unit 60 may store location information of the lens module 100 according to the distance to the subject. For example, the storage unit 60 may store information about the focusing position for focusing the subject. The information about the focusing position may be position information of the lens module 100 for accurately focusing the subject. And the focusing position may change depending on the distance to the subject. Accordingly, the storage unit 60 can store data corresponding to the position of the lens module 100 according to the distance.

At this time, the first driving coil 50 of the embodiment includes a first coil 51 and a second coil 52.

And in the embodiment, the intensity of current applied to the first coil 51 and the second coil 52 is adjusted to move the lens module 100 to the target position. Accordingly, the storage unit 60 may include position data corresponding to the first coil 51 and position data corresponding to the second coil 52. For example, the storage unit 60 may store calibration data corresponding to the first coil 51 and calibration data corresponding to the second coil 52, respectively.

The control unit 70 controls the overall operation of the camera module.

The operation of the control unit 70 will be explained in conjunction with FIGS. 10 and 11.

In particular, the control unit 70 is connected to the sensor unit 40. Then, the control unit 70 receives the location information of the lens module 100 obtained through the sensor unit 40 (S100). Through this, the control unit 70 determines the movement amount to move the position of the lens module 100 to the target position (S110). At this time, the movement amount may be a driving force corresponding to the current intensity to be applied to the first coil 51 and the second coil 52, respectively.

To this end, the control unit 70 may include a first port (not shown) connected to the first coil 51 and a second port (not shown) connected to the second coil 52. The first port and the second port may each be comprised of a plurality. For example, the control unit 70 includes two first ports connected to one end and the other end of the first coil 51, respectively. Additionally, the control unit 70 includes two second ports connected to one end and the other end of the second coil 52, respectively. Specifically, the control unit 70 may be a 4-channel IC.

In addition, the control unit 70 provides current information to be applied to the first coil 51 connected to the first port in response to the driving force generated from the first driving coil 50 and the second coil 52 connected to the second port. ) Obtain current information to be applied (S120). The current information may include current intensity and current direction.

And, the control unit 70 may supply current to the first coil 51 and the second coil 52, respectively, based on the obtained current information.

At this time, the process of obtaining current information (eg, current intensity) to be applied to the first coil 51 and the second coil 52 will be described in more detail.

The control unit 70 is configured to generate a portion of the driving force (for example, 1/n of the total driving force, where n is greater than 1) of the total driving force required to move the lens module 100 to the target position. Calculate the current intensity of the first coil 51 (S200). At this time, the control unit 70 extracts the calibration data of the first coil 51 stored in the storage unit 60 (S210), and uses the extracted calibration data to determine the current intensity of the first coil 51. It can be calculated.

Next, the control unit 70 uses the remaining part of the driving force (for example, 1/m of the total driving force, where (1/n)+(1) among the total driving force required to move the lens module 100 to the target position. Calculate the current intensity of the second coil 52 to generate /m)=1)) (S220). At this time, the control unit 70 extracts the calibration data of the second coil 52 stored in the storage unit 60 (S230), and uses the extracted calibration data to determine the current intensity of the second coil 52. It can be calculated.

Additionally, the control unit 70 may supply current corresponding to the calculated current intensity to the first coil 51 and the second coil 52, respectively (S240).

At this time, the control unit 70 may cause half of the total driving force to be generated from each of the first coil 51 and the second coil 52. For example, when the total driving force is expressed as '10', the control unit 70 divides the total driving force in half to form the first coil 51 and the second coil 52. It is possible to generate a driving force corresponding to 1/2 of the total driving force. For example, the control unit 70 generates a driving force of '5', which is 1/2 of the total driving force, in the first coil 51, and generates a driving force of '5', which is 1/2 of the total driving force, in the second coil 52. 'The driving force can be generated.

Alternatively, the control unit 70 may cause different driving forces to be generated in the first coil 51 and the second coil 52.

For example, the control unit 70 may cause the first driving force that can be generated at the maximum in the first coil 51 among the total driving force to be generated in the first coil 51. The first driving force may be greater than 1/2 of the total driving force, but is not limited thereto. The first driving force may be determined by the maximum current intensity of the control unit 70, but is not limited thereto.

Additionally, the control unit 70 may cause the second coil 52 to generate a second driving force remaining by subtracting the first driving force from the total driving force.

Additionally, the control unit 70 may cause the first coil 51 to generate a first driving force corresponding to a portion of the driving force (for example, 1/2 or 2/3) of the total driving force. Additionally, the control unit 70 may obtain position information of the lens module 100 moving by the first driving force. Thereafter, the control unit 70 may cause a second driving force corresponding to the remaining part of the driving force to be generated in the second coil 52 based on the acquired position information. Through this, the control unit 70 of the embodiment can perform AF feedback control.

Differently, the control unit 70 can cause the first and second driving forces corresponding to the total driving force to be generated in the first coil 51 and the second coil 52 through open loop control without feedback control. .

Meanwhile, as described above, when the control unit 70 is a 6-channel IC, the first driving coil 50 may include first to third coils. In addition, the control unit 70 may cause first to third driving forces corresponding to the total driving force (for example, 1/3 of the total driving force) to be generated from the first to third coils, respectively.

Additionally, the control unit 70 may include first and second sub-controllers of a 4-channel IC. And, the first driving coil 50 may include first to fourth coils. Additionally, the first sub-control unit may be connected to the first and second coils, and the second sub-control unit may be connected to the third and fourth coils. And, in the embodiment, first to fourth driving forces corresponding to the total driving force (for example, 1/4 of the total driving force) may be generated from the first to fourth coils, respectively.

Figure 12 shows a mobile terminal to which a camera module according to an embodiment is applied.

As shown in FIG. 12, the mobile terminal 1500 of the embodiment may include a camera module 1000, a flash module 1530, and an autofocus device 1510 provided at the rear. The mobile terminal 1500 of the embodiment may further include a second camera module 1100.

The camera module 1000 may include an image capturing function and an autofocus function. For example, the camera module 1000 may include an autofocus function using an image. The camera module 1000 may be the camera module shown in FIG. 1.

The camera module 1000 processes image frames of still or moving images obtained by an image sensor in shooting mode or video call mode. The processed image frame can be displayed on a certain display unit and stored in memory. A camera (not shown) may also be placed on the front of the mobile terminal body.

For example, the camera module 1000 may include a first camera module and a second camera module, and the first camera module may enable OIS implementation along with AF or zoom functions.

The flash module 1530 may include a light-emitting element therein that emits light. The flash module 1530 can be operated by operating a camera of a mobile terminal or by user control.

The autofocus device 1510 may include one of the packages of surface light-emitting laser devices as a light emitting unit.

The autofocus device 1510 may include an autofocus function using a laser. The autofocus device 1510 can be mainly used in conditions where the autofocus function using the image of the camera module 1000 is deteriorated, for example, in close proximity of 10 m or less or in dark environments. The autofocus device 1510 may include a light emitting unit including a vertical cavity surface emitting laser (VCSEL) semiconductor device, and a light receiving unit such as a photo diode that converts light energy into electrical energy.

Figure 13 is a perspective view of a vehicle to which a camera module according to an embodiment is applied.

For example, Figure 13 is an exterior view of a vehicle equipped with a vehicle driving assistance device to which a camera module is applied according to an embodiment.

Referring to FIG. 13, the vehicle 700 of the embodiment may be provided with wheels 13FL and 13FR that rotate by a power source and a predetermined sensor. The sensor may be a camera sensor 2000, but is not limited thereto.

The camera 2000 may be a camera sensor to which the camera module 1000 according to the embodiment is applied.

The vehicle 700 of the embodiment may acquire image information through a camera sensor 2000 that captures a front image or surrounding image, determines the lane identification situation using the image information, and generates a virtual lane upon identification. can do.

For example, the camera sensor 2000 may acquire a front image by photographing the front of the vehicle 700, and a processor (not shown) may acquire image information by analyzing objects included in the front image.

For example, if the image captured by the camera sensor 2000 includes objects such as lanes, adjacent vehicles, obstacles, and median strips, curbs, and street trees corresponding to indirect road markings, the processor detects these objects. This can be included in the video information.

At this time, the processor can further supplement the image information by obtaining distance information to the object detected through the camera sensor 2000. Image information may be information about an object captured in an image.

This camera sensor 2000 may include an image sensor and an image processing module. The camera sensor 2000 can process still images or moving images obtained by an image sensor (eg, CMOS or CCD). The image processing module can process still images or moving images obtained through an image sensor, extract necessary information, and transmit the extracted information to the processor.

At this time, the camera sensor 2000 may include a stereo camera to improve the measurement accuracy of the object and secure more information such as the distance between the vehicle 700 and the object, but is not limited thereto.

The vehicle 700 of the embodiment may provide advanced driver assistance systems (ADAS).

For example, advanced driver assistance systems (ADAS) include Autonomous Emergency Braking (AEB), which slows or stops on its own without the driver having to apply the brakes in the event of a collision; Lane Keep Assist System (LKAS), which automatically maintains the distance from the car in front while driving at a preset speed, and Advanced Smart Cruise Control (ASCC), which automatically maintains the distance from the car in front while driving at a preset speed, reducing the risk of blind spot collisions. There is a rear collision avoidance support system (ABSD: Active Blind Spot Detection) that detects and helps safe lane changes, and an Around View Monitor (AVM) system that visually shows the situation around the vehicle.

In these advanced driver assistance systems (ADAS), camera modules function as core components along with radar, and the proportion of camera modules being applied is gradually expanding.

For example, in the case of the automatic emergency braking system (AEB), the vehicle's front camera sensor and radar sensor can detect vehicles or pedestrians ahead and automatically apply emergency braking when the driver does not control the vehicle. Alternatively, in the case of the driving steering assistance system (LKAS), a camera sensor can be used to detect whether the driver leaves the lane without using turn signals and automatically steer the steering wheel to maintain the lane. Additionally, the Around View Monitoring System (AVM) can visually show the situation around the vehicle through camera sensors placed on all sides of the vehicle.

The features, structures, effects, etc. described in the embodiments above are included in at least one embodiment 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 interpreted as being included in the scope of the embodiments.

Although the above description focuses on the embodiment, this is only an example and does not limit the embodiment, and those skilled in the art will understand that there are various options not exemplified above without departing from the essential characteristics of the present embodiment. You will see that variations and applications of branches are possible. For example, each component specifically shown in the examples can be modified and implemented. And these variations and differences related to application should be interpreted as being included in the scope of the embodiments set forth in the appended claims.

Claims (16)

housing;
a driving magnet disposed in the housing;
a bobbin disposed inside the housing and moving in the optical axis direction within the housing; and
It is disposed on the bobbin and includes a driving coil facing the driving magnet,
The driving coil is,
a first coil disposed on the bobbin and facing the driving magnet in a first direction perpendicular to the optical axis; and
a second coil disposed on the bobbin together with the first coil and corresponding to the driving magnet in the first direction;
The first coil and the second coil are not directly electrically connected to each other,
Lens driving device. According to paragraph 1,
On the outer peripheral surface of the bobbin,
A groove is formed in which the first coil and the second coil are accommodated,
Lens driving device. According to paragraph 2,
The groove is,
a first groove in which the first coil is accommodated, and
Comprising a second groove spaced apart from the first groove in the optical axis direction and receiving the second coil,
Lens driving device. According to claim 1 or 2,
The first coil is disposed on the outer peripheral surface of the bobbin,
The second coil is disposed on the outer peripheral surface of the first coil to overlap the first coil in the first direction,
Lens driving device. According to paragraph 4,
The first coil, the second coil, and the driving magnet are aligned in the first direction,
Lens driving device. According to paragraph 1,
Each of the first coil and the second coil is arranged to overlap the outer peripheral surface of the bobbin in the optical axis direction,
Lens driving device. According to clause 6,
The driving magnet is,
A first area overlapping the first coil in the first direction,
It includes a second area overlapping the second coil in the first direction,
The first area and the second area extend in the optical axis direction,
Lens driving device. According to paragraph 1,
The first coil includes a first lead line and a second lead line,
The second coil includes a third lead line and a fourth lead line,
The first and second lead lines are not directly electrically connected to the third and fourth lead lines,
Lens driving device. According to clause 8,
The first coil receives a first current from one of the first and second lead lines,
The second coil receives a second current from one of the third and fourth lead lines,
The first current is provided to the first coil without passing through the second coil,
The second current is provided to the second coil without passing through the first coil,
Lens driving device. According to clause 9,
Further comprising a substrate disposed below the bobbin and electrically connected to the first coil and the second coil,
The substrate is,
a first terminal connected to the first coil and providing the first current to the first coil;
Comprising a second terminal connected to the second coil and providing the second current to the second coil,
Lens driving device. According to clause 9,
The intensity of the first current is different from the intensity of the second current,
Lens driving device. According to clause 10,
Further comprising a driving element disposed on the substrate,
The driving element is,
Calculate the intensity of the first current to be applied to the first coil and the intensity of the second current to be applied to the second coil,
So that the first and second currents corresponding to the calculated intensity are individually supplied to the first coil and the second coil,
Lens driving device. According to clause 12,
The driving coil further includes a third coil that is not electrically connected to the first and second coils,
The driving element supplies individual first to third currents to the first to third coils, thereby moving the bobbin in the optical axis direction.
Lens driving device. According to clause 10,
The driving coil further includes third and fourth coils that are not electrically connected to the first and second coils,
The driving element is,
a first driving element connected to the first and second coils; and
It includes a second driving element connected to the third and fourth coils,
The first driving element supplies individual first and second currents to the first and second coils,
The second driving element supplies individual third and fourth currents to the third and fourth coils,
The bobbin moves in the optical axis direction by a driving force corresponding to the first to fourth currents supplied to the first to fourth coils,
Lens driving device. image sensor;
An image sensor board on which the image sensor is mounted;
a lens driving device disposed on the image sensor substrate and according to any one of claims 1 to 14; and
A lens module coupled to the bobbin of the lens driving device and moving with the bobbin.
Camera module. main body,
a camera module according to claim 15 that is disposed in the main body and captures an image of a subject; and
A display unit disposed on the main body and outputting an image captured by the camera module,
Optical equipment.

Images