KR20210117124A - Reflection module and camera module including the same - Google Patents

Abstract

A camera module according to an embodiment of the present invention includes: a lens module having a plurality of lenses disposed along an optical axis; a housing accommodating the lens module; and a reflection module disposed in front of the lens module and including a reflection member for changing an optical path and a holder on which the reflection member is mounted. The reflection module is rotatably provided with a first axis and a second axis perpendicular to the optical axis as rotation axes. A first position sensor for detecting a change in the position of the reflection module with the first axis as a rotation axis and a second position sensor for detecting a change in the position of the reflection module with the second axis as a rotation axis are disposed in the housing. The sensitivity of the first position sensor and the sensitivity of the second position sensor can be different from each other.

Description

Reflection module and camera module including the same

The present invention relates to a reflection module and a camera module including the same.

Recently, a camera module is basically employed in portable electronic devices including smartphones. The thickness of portable electronic devices tends to be reduced in response to market demands, and accordingly, the camera module is also required to be miniaturized.

On the other hand, apart from the demand for miniaturization of the camera module, performance improvement of the camera module is also required. Accordingly, functions such as auto focus adjustment and shake correction are added to the camera module, so that there is a limit in reducing the size of the camera module.

That is, the camera module has a problem in that it is difficult to reduce its size despite the demand for miniaturization, and thus there is a limit in reducing the thickness of the portable electronic device.

Recently, in order to solve this problem, a camera module having a plurality of lenses arranged in a longitudinal direction or a width direction rather than a thickness direction of a portable electronic device and a reflective member for changing a path of light has been proposed.

Such a camera module has a structure for compensating for shake by rotating the reflective member, and depending on the rotation direction of the reflective member, light may be reflected at an angle greater than the reflection angle of light required for stabilizing the shake.

In this case, since shake correction performance is deteriorated, it is necessary to more precisely detect the position of the reflective member.

An object of the present invention is to provide a reflection module capable of precisely detecting the position of the reflection module and a camera module including the same.

A camera module according to an embodiment of the present invention includes a lens module having a plurality of lenses disposed along an optical axis; a housing accommodating the lens module; and a reflective module disposed in front of the lens module and including a reflective member for changing an optical path and a holder on which the reflective member is mounted, wherein the reflective module includes a first axis and a second axis perpendicular to the optical axis. It is rotatably provided with an axis as a rotation axis, and the housing has a first position sensor for detecting a change in the position of the reflective module with the first axis as a rotation axis and a position change of the reflection module with the second axis as the rotation axis. A second position sensor may be disposed, and the sensitivity of the first position sensor and the sensitivity of the second position sensor may be different from each other.

A reflective module according to an embodiment of the present invention includes a reflective member for changing a light path; a holder on which the reflective member is mounted; a housing accommodating the holder; a first driving unit including a first magnet disposed on the holder and a first coil facing the first magnet; and a second driving unit including a second magnet disposed on the holder and a second coil facing the second magnet, wherein the holder is rotatable with a first axis as a rotation axis by the first driving unit, The second driving unit is rotatable about a second axis perpendicular to the first axis as a rotation axis, and the housing includes a first position sensor facing the first magnet and a second position sensor facing the second magnet. and the sensitivity of the first position sensor and the sensitivity of the second position sensor may be different from each other.

The reflection module and the camera module including the same according to an embodiment of the present invention can precisely detect the position of the reflection module.

1 is a perspective view of a portable electronic device equipped with a camera module according to an embodiment of the present invention.
2 is a schematic perspective view of a camera module according to an embodiment of the present invention.
FIG. 3A is a cross-sectional view taken along line II′ of FIG. 2 .
FIG. 3B is a cross-sectional view taken along line II-II′ of FIG. 2 .
4 is a schematic exploded perspective view of a camera module according to an embodiment of the present invention.
5 is a plan view of a lens provided in a camera module according to an embodiment of the present invention.
6 is an exploded perspective view of a housing, a guide member, and a reflective module of a camera module according to an embodiment of the present invention.
7 is a perspective view of a first driving unit and a second driving unit of a camera module according to an embodiment of the present invention.
8A is a side view of the first magnet and the second magnet, and FIG. 8B is a side view of the first coil and the second coil.
9A to 9C are diagrams schematically illustrating a state in which the reflection module is rotated about a first axis (X axis) as a rotation axis.
10A to 10C are diagrams schematically illustrating a state in which the reflection module is rotated about the second axis (Y axis) as the rotation axis.
11 is a schematic exploded perspective view of a reflection module;
12 is a schematic front view of a reflection module.
13 is an exploded perspective view of a housing and a lens module of a camera module according to an embodiment of the present invention.
14 is a perspective view illustrating a state in which a case is removed from the camera module according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiment.

For example, those skilled in the art who understand the spirit of the present invention will be able to propose other embodiments included within the scope of the present invention through addition, change, or deletion of components, but this is also the spirit of the present invention. will be considered to be within the scope.

In addition, terms including an ordinal number such as "first", "second", etc. used herein may be used to describe various elements, but the elements are not limited by the terms, and the terms are It is used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

1 is a perspective view of a portable electronic device equipped with a camera module according to an embodiment of the present invention.

Referring to FIG. 1 , a camera module 1000 according to an embodiment of the present invention may be mounted on a portable electronic device 1 . The portable electronic device 1 may be a portable electronic device such as a mobile communication terminal, a smart phone, or a tablet PC.

As shown in FIG. 1 , the portable electronic device 1 is equipped with a camera module 1000 to photograph a subject.

In this embodiment, the camera module 1000 includes a plurality of lenses. The optical axis (Z axis) of the plurality of lenses is perpendicular to the thickness direction of the portable electronic device 1 (X-axis direction, the direction from the front surface to the rear surface of the portable electronic device or the opposite direction). direction can be directed.

For example, the optical axis (Z axis) of the plurality of lenses provided in the camera module 1000 may be formed in the width direction or the length direction of the portable electronic device 1 .

Therefore, even if the camera module 1000 has functions such as Auto Focusing (hereinafter referred to as AF), Optical Zoom (hereinafter referred to as Zoom), and Optical Image Stabilizing (hereinafter referred to as OIS), the portable electronic device 1 ) can be prevented from increasing. Accordingly, it is possible to reduce the thickness of the portable electronic device 1 .

The camera module 1000 according to an embodiment of the present invention may include at least one of AF, Zoom, and OIS functions.

Since the camera module 1000 having AF, Zoom, and OIS functions, etc. must be provided with various parts, the size of the camera module increases as compared to a general camera module.

If the size of the camera module 1000 is increased, there may be a problem in miniaturization of the portable electronic device 1 in which the camera module 1000 is mounted.

For example, the camera module includes a plurality of lens groups for the zoom function. When the plurality of lens groups are arranged in the thickness direction of the portable electronic device, the thickness of the portable electronic device also increases according to the number of lens groups. . Accordingly, if the thickness of the portable electronic device is not increased, the number of lens groups cannot be sufficiently secured, and the zoom performance is weakened.

In addition, in order to implement AF, Zoom and OIS functions, it is necessary to install an actuator that moves a plurality of lens groups in the optical axis direction or in a direction perpendicular to the optical axis. When formed in the thickness direction, the actuator for moving the lens group must also be installed in the thickness direction of the portable electronic device. Accordingly, the thickness of the portable electronic device is increased.

However, in the camera module 1000 according to an embodiment of the present invention, since the optical axes (Z-axis) of the plurality of lenses are disposed perpendicular to the thickness direction (X-axis direction) of the portable electronic device 1, AF, Zoom and Even if the camera module 1000 having an OIS function is mounted, the portable electronic device 1 can be made thin.

2 is a schematic perspective view of a camera module according to an embodiment of the present invention, FIG. 3A is a cross-sectional view taken along II-I' of FIG. 2, and FIG. 3B is a cross-sectional view taken along II-II' of FIG.

4 is a schematic exploded perspective view of a camera module according to an embodiment of the present invention, and FIG. 5 is a plan view of a lens provided in the camera module according to an embodiment of the present invention.

2 to 4 , the camera module 1000 includes a housing 110 , a reflection module 300 , a lens module 400 , an image sensor module 500 , and a case 130 .

A reflection module 300 , a lens module 400 , and an image sensor module 500 are disposed inside the housing 110 from one side to the other side. The housing 110 has an internal space to accommodate the reflection module 300 , the lens module 400 , and the image sensor module 500 . However, the image sensor module 500 may be attached to the outside of the housing 110 .

2 to 4 show an embodiment in which the reflection module 300 , the lens module 400 and the image sensor module 500 are disposed inside the housing 110 . However, unlike the exemplary embodiment of FIGS. 2 to 4 , the reflective module 300 may be disposed outside the housing 110 , and in this case, the reflective module 300 may be disposed on the housing 110 so that the light transmitted from the reflective module 300 may pass therethrough. One side may be open. In addition, the reflective module 300 disposed outside the housing 110 may be accommodated in a separate housing.

The housing 110 may have a box shape with an open top.

The case 130 is coupled to the housing 110 so as to cover an upper portion of the housing 110 . The case 130 has an opening 131 through which light is incident. The light incident through the opening 131 of the case 130 is changed in a traveling direction by the reflection module 300 and is incident on the lens module 400 .

The reflection module 300 is configured to change the propagation direction of light. For example, the direction of the light incident into the housing 110 may be changed to be directed toward the lens module 400 through the reflection module 300 .

The reflective module 300 includes a reflective member 310 and a holder 330 on which the reflective member 310 is mounted.

The reflective member 310 is configured to change the traveling direction of light. For example, the reflective member 310 may be a mirror or a prism that reflects light.

The path of the light incident through the opening 131 of the case 130 is changed toward the lens module 400 by the reflection module 300 . For example, the path of the light incident in the thickness direction (X-axis direction) of the camera module 1000 is changed to approximately coincide with the optical axis direction (Z-axis direction) by the reflection module 300 .

On the other hand, when the reflective module 300 is disposed outside the housing 110 , the reflective module 300 may further include a separate housing accommodating the holder 330 , and applies a driving force to the reflective module 300 . The provided first driving unit 810 and the second driving unit 830 may be disposed in separate housings.

The lens module 400 includes a plurality of lenses through which the light whose traveling direction is changed by the reflective member 310 passes, and a lens barrel 410 for accommodating the plurality of lenses.

For convenience of explanation, only the lens L1 (hereinafter referred to as a first lens) disposed closest to the object side among the plurality of lenses is illustrated in FIG. 4 .

The image sensor module 500 includes an image sensor 510 and a printed circuit board 530 .

The image sensor 510 is connected to the printed circuit board 530 by a bonding wire.

Meanwhile, the image sensor module 500 may further include an infrared cut-off filter. The infrared cut filter may be attached to the housing. The infrared cut filter serves to block light in the infrared region among the light passing through the lens module 400 .

With respect to the lens module 400 , the reflection module 300 is disposed in front of the lens module 400 (the left side based on FIG. 2 ), and at the rear side of the lens module 400 (the right side based on FIG. 2 ) An image sensor module 500 is disposed.

At least one lens among the plurality of lenses has a non-circular planar shape. For example, the first lens L1 is non-circular when viewed in the optical axis direction (Z-axis direction). On the other hand, it is also possible for the plurality of lenses to all have a non-circular planar shape.

Referring to FIG. 5 , in a plane perpendicular to the optical axis (Z axis), the first lens L1 has a length in the first axis direction (X axis direction) perpendicular to the optical axis (Z axis) along the optical axis (Z axis). and a length in a second axial direction (Y-axis direction) that are both perpendicular to the first axial direction (X-axis direction).

For example, the first lens L1 has a major axis and a minor axis. A line segment connecting both sides of the first lens L1 in the first axis direction (X-axis direction) while passing through the optical axis (Z axis) is a short axis, and passing through the optical axis (Z axis) in the second axis direction (Y axis) direction), a line segment connecting both sides of the first lens L1 is a long axis. The major axis and the minor axis are perpendicular to each other, and the length of the major axis is longer than the length of the minor axis.

The first lens L1 includes an optical part 10 and a flange part 30 .

The optical unit 10 may be a portion in which the optical performance of the first lens L1 is exhibited. For example, light reflected from the subject may pass through the optical unit 10 and be refracted.

The optical unit 10 may have refractive power and may have an aspherical shape.

The flange part 30 may be configured to fix the first lens L1 to another configuration, for example, the lens barrel 410 or another lens.

The flange part 30 extends from the optical part 10 and may be integrally formed with the optical part 10 .

The optical part 10 is formed in a non-circular shape. For example, the optical unit 10 is non-circular when viewed in the optical axis direction (Z axis direction). Referring to FIG. 5 , in a plane perpendicular to the optical axis (Z axis), the optical unit 10 has a length in the first axis direction (X axis direction) perpendicular to the optical axis (Z axis) of the optical axis (Z axis) and It is shorter than the length in the second axial direction (Y-axis direction) both perpendicular to the first axial direction (X-axis direction).

The optic 10 includes a first edge 11 , a second edge 12 , a third edge 13 and a fourth edge 14 .

When viewed in the optical axis direction (Z-axis direction), the first edge 11 and the second edge 12 each have an arc shape.

The second edge 12 is provided on the opposite side of the first edge 11 . In addition, the first edge 11 and the second edge 12 are positioned to face each other based on the optical axis (Z axis).

The fourth edge 14 is provided on the opposite side of the third edge 13 . In addition, the third edge 13 and the fourth edge 14 are positioned to face each other based on the optical axis (Z axis).

The third edge 13 and the fourth edge 14 connect the first edge 11 and the second edge 12, respectively. The third edge 13 and the fourth edge 14 are symmetrical with respect to the optical axis (Z-axis), and may be formed parallel to each other.

When viewed in the optical axis direction (Z-axis direction), the first edge 11 and the second edge 12 have an arc shape, and the third edge 13 and the fourth edge 14 are generally Includes straight shapes.

The optical unit 10 has a major axis (a, major axis) and a minor axis (b, minor axis). The line segment connecting the third edge 13 and the fourth edge 14 with the shortest distance while passing the optical axis (Z axis) is the short axis (b), and passing through the optical axis (Z axis), the first edge 11 and A line segment connecting the second edge 12 and perpendicular to the minor axis b is the major axis a. The length of the major axis (a) is longer than the length of the minor axis (b).

The flange portion 30 extends along a periphery of a portion of the optical portion 10 in the second axial direction (Y-axis direction). At least a portion of the flange portion 30 is in contact with the inner surface of the lens barrel 410 .

The flange portion 30 includes a first flange portion 31 and a second flange portion 32 . A first flange portion 31 extends from a first edge 11 of the optic 10 , and a second flange portion 32 extends from a second edge 12 of the optic 10 .

The first edge 11 of the optical part 10 may refer to a portion adjacent to the first flange part 31 , and the second edge 12 of the optical part 10 may be connected to the second flange part 32 and the second edge part 12 of the optical part 10 . It may mean an adjacent part.

The third edge 13 of the optical part 10 may mean one side of the optical part 10 on which the flange part 30 is not formed, and the fourth edge 14 of the optical part 10 is a planar surface. It may mean the other side of the optical part 10 on which the branch 30 is not formed.

Meanwhile, referring to FIG. 4 , the first lens L1 is disposed such that one of the side surfaces facing the first axial direction (X-axis direction) faces the bottom surface of the housing 110, and the second axial direction (Y axial direction) are disposed to face the inner surface of the housing 110 , respectively.

That is, the first lens L1 is disposed so that side surfaces facing the first axial direction (X-axis direction) face the thickness direction (X-axis direction) of the housing 110, and the second axial direction (Y-axis direction) The facing sides are disposed to face the width direction (Y-axis direction) of the housing 110 .

The first axial direction (X-axis direction) is an axis formed in the thickness direction (X-axis direction) of the housing 110 , and the second axial direction (Y-axis direction) is the width direction (Y-axis direction) of the housing 110 . axis is formed.

Since the length of the first lens L1 in the first axial direction (X-axis direction) is shorter than the length in the second axial direction (Y-axis direction), the thickness of the housing 110 may be reduced.

6 is an exploded perspective view of a housing, a guide member, and a reflective module of a camera module according to an embodiment of the present invention, and FIG. 7 is a perspective view of a first driving unit and a second driving unit of the camera module according to an embodiment of the present invention. , FIG. 8A is a side view of the first magnet and the second magnet, and FIG. 8B is a side view of the first coil and the second coil.

9A to 9C are diagrams schematically illustrating a state in which the reflection module is rotated about a first axis (X axis) as a rotation axis,

10A to 10C are diagrams schematically illustrating a state in which the reflection module is rotated about the second axis (Y axis) as the rotation axis.

The reflection module 300 and the lens module 400 are disposed in the inner space of the housing 110 . The housing 110 is provided with a protruding wall 112 . For example, the protrusion wall 112 may have a shape protruding toward each other from both inner surfaces of the housing 110 .

The inner space of the housing 110 may be divided into a space in which the reflection module 300 is disposed and a space in which the lens module 400 is disposed by the protruding wall 112 . For example, the reflective module 300 is disposed at the front with respect to the protruding wall 112 , and the lens module 400 is disposed at the rear thereof.

The reflective module 300 is disposed in the inner space of the housing 110 and may be pulled toward the housing 110 . For example, the reflection module 300 may be pulled toward the inner surface of the housing 110 in the optical axis direction (Z axis direction).

To this end, a magnetic material is disposed in the housing 110 and the reflective module 300, respectively. At least one of the magnetic material disposed on the housing 110 and the reflective module 300 may be a magnet. For example, a pulling yoke 710 is disposed in the housing 110 , and a pulling magnet 730 is disposed in the reflective module 300 . The pulling yoke 710 and the pulling magnet 730 are disposed to face each other in the optical axis direction (Z axis direction). The pulling yoke 710 may be a magnetic material.

Accordingly, the pulling yoke 710 and the pulling magnet 730 generate attractive force in the optical axis direction (Z axis direction), and accordingly, the reflective module 300 may be pressed toward the housing 110 .

The mounting positions of the pulling yoke 710 and the pulling magnet 730 may be interchanged. In another embodiment, it is also possible that the pulling magnet 730 is mounted to each of the housing 110 and the reflective module 300 .

The guide member 200 is disposed in front of the reflection module 300 . The guide member 200 is disposed between the inner surface of the housing 110 and the reflective module 300 . For example, the guide member 200 is disposed between the inner surface of the housing 110 in which the pulling yoke 710 is disposed and the reflective module 300 in which the pulling magnet 730 is disposed.

The guide member 200 may have a plate shape, and may include a through hole 210 so that the pulling yoke 710 and the pulling magnet 730 directly face each other.

A protrusion 111 protruding in the optical axis direction (Z axis direction) is provided on the inner surface of the housing 110 , and the protrusion 111 is disposed in the through hole 210 of the guide member 200 (see FIG. 3A ). . The pulling yoke 710 may be disposed on the protrusion 111 .

Since the pulling yoke 710 and the pulling magnet 730 are disposed to directly face each other, it is possible to maximize the pulling force of the reflective module 300 . In addition, the camera module can be downsized in the optical axis direction (Z axis direction).

Since attractive force acts in the optical axis direction (Z-axis direction) between the pulling yoke 710 and the pulling magnet 730, the reflective module 300 and the guide member 200 move toward the housing 110 in the optical axis direction (Z). axial) can be pressed.

A first ball member B1 is disposed between the guide member 200 and the reflective module 300 , and a second ball member B2 is disposed between the housing 110 and the guide member 200 .

The first ball member B1 includes a plurality of ball members spaced apart along the first axis (X-axis), and the second ball member B2 includes a plurality of ball members spaced apart along the second axis (Y-axis). ball member.

The first ball member B1 is in contact with the guide member 200 and the reflection module 300 by the attractive force between the pulling yoke 710 and the pulling magnet 730, and the second ball member B2 is the housing 110 ) and the guide member 200 .

Receiving grooves in which the first ball member B1 is accommodated are provided on the surfaces of the guide member 200 and the reflective module 300 facing each other. For example, a first accommodating groove 335 and a second accommodating groove 230 are provided on a surface of the guide member 200 and the reflective module 300 facing each other in the optical axis direction (Z-axis direction), and the first ball The member B1 is disposed between the first accommodating groove 335 and the second accommodating groove 230 .

The first accommodating groove 335 and the second accommodating groove 230 include a plurality of accommodating grooves spaced apart from each other along the first axis (X-axis).

Receiving grooves in which the second ball member B2 is accommodated are provided on surfaces of the housing 110 and the guide member 200 facing each other. For example, a third accommodating groove 250 and a fourth accommodating groove 117 are provided on a surface of the housing 110 and the guide member 200 facing each other in the optical axis direction (Z-axis direction), and the second ball member (B2) is disposed between the third receiving groove 250 and the fourth receiving groove (117).

The third accommodating groove 250 and the fourth accommodating groove 117 each include a plurality of accommodating grooves spaced apart along the second axis (Y-axis).

The camera module 1000 according to an embodiment of the present invention may correct shake during photographing by rotating the reflection module 300 .

For example, when shake occurs during photographing, a relative displacement corresponding to the shake may be applied to the reflection module 300 to correct the shake.

The reflection module 300 may be rotated based on a first axis (X axis) and a second axis (Y axis). For example, the reflection module 300 may be rotated relative to the guide member 200 using the first axis (X axis) as a rotation axis. In addition, the reflection module 300 may be rotated relative to the housing 110 together with the guide member 200 using the second axis (Y axis) as a rotation axis.

A first ball member B1 is disposed between the guide member 200 and the reflection module 300, and the first ball member B1 includes a plurality of ball members disposed along a first axis (X-axis). . Accordingly, the reflection module 300 may be rotated about the first axis (X axis) as a rotation axis while being supported by the first ball member B1 (see FIGS. 9A to 9C ).

Since the first ball member B1 includes a plurality of ball members disposed along the first axis (X-axis), the reflective module 300 uses the first axis (X-axis) as a rotation axis to be attached to the guide member 200 . can be rotated relative to On the other hand, the reflective module 300 is limited in relative rotation with respect to the guide member 200 using the second axis (Y-axis) as a rotation axis.

A second ball member B2 is disposed between the housing 110 and the guide member 200 , and the second ball member B2 includes a plurality of ball members disposed along a second axis (Y-axis). Accordingly, the guide member 200 may be rotated using the second axis (Y axis) as a rotation axis while being supported by the second ball member B2 (see FIGS. 10A to 10C ).

Since the second ball member B2 includes a plurality of ball members disposed along the second axis (Y axis), the guide member 200 is rotated with respect to the housing 110 with the second axis (Y axis) as a rotation axis. It can be rotated relative. Meanwhile, relative rotation of the guide member 200 with respect to the housing 110 using the first axis (X axis) as a rotation axis is limited.

Here, since the reflective module 300 is restricted from being rotated relative to the guide member 200 with the second axis (Y-axis) as the rotation axis, the reflective module 300 is formed in the housing 110 together with the guide member 200 . The second axis (Y axis) may be relatively rotated with respect to the axis of rotation.

A driving unit may be provided to rotate the reflection module 300 . For example, the camera module 1000 according to an embodiment of the present invention includes a first driving unit 810 that rotates the reflection module 300 with a first axis (X axis) as a rotation axis and the reflection module 300 as a second axis. It may include a second driving unit 830 that rotates the axis (Y-axis) as a rotation axis (see FIGS. 4 and 7 ).

The first driving unit 810 includes a first magnet 811 and a first coil 813 .

The first magnet 811 is mounted on the reflection module 300 . For example, the first magnet 811 is disposed on a sidewall of the holder 330 .

The first coil 813 is disposed to face the first magnet 811 in a direction perpendicular to the optical axis direction (Z axis direction). For example, the housing 110 is provided with a through hole 113 in which the first coil 813 is disposed, and the first coil 813 is disposed in the through hole 113 to provide the first magnet 811 and the second coil 813 . They are arranged to face each other in the axial direction (Y-axis direction). The first coil 813 may be provided on the substrate 170 coupled to the housing 110 (refer to FIG. 4 ).

The first magnet 811 may include a plurality of magnets disposed on both sidewalls of the holder 330 , and the first coil 813 may also include a plurality of coils to correspond to the first magnet 811 . .

A surface of the first magnet 811 facing the first coil 813 may have a first polarity 811a and a second polarity 811b magnetized along the optical axis direction (Z-axis direction).

For example, on the surface of the first magnet 811 facing the first coil 813, the first polarity 811a, the neutral region 811c, and the second polarity 811b sequentially along the optical axis direction (Z-axis direction) ) may be provided. The first polarity 811a may have an N pole or an S pole, and the second polarity 811b may have a polarity opposite to the first polarity 811a (S pole or N pole). A neutral region 811c is provided between the first polarity 811a and the second polarity 811b.

The first magnet 811 and the first coil 813 generate a driving force in a direction perpendicular to a direction facing each other. For example, the first magnet 811 and the first coil 813 generate a driving force in the optical axis direction (Z axis direction).

Accordingly, by the driving force of the first magnet 811 and the first coil 813 , the reflection module 300 may be rotated using the first axis (X axis) as the rotation axis.

Both sidewalls of the holder 330 may protrude in the optical axis direction (Z-axis direction) to surround the guide member 200 (see FIGS. 4 and 6 ). The first magnet 811 may be disposed on both sidewalls of the protruding holder 330 to surround the guide member 200 .

Meanwhile, the neutral region 811c of the first magnet 811 may be positioned on the same line with the center of the first ball member B1 in the second axial direction (Y-axis direction). Alternatively, the neutral region 811c of the first magnet 811 may be located in front of the center of the first ball member B1 in the optical axis direction (Z-axis direction).

Therefore, it is possible to rotate the reflection module 300 even with a smaller driving force.

The second driving unit 830 includes a second magnet 831 and a second coil 833 .

The second magnet 831 is mounted on the reflection module 300 . For example, the second magnet 831 is disposed on a sidewall of the holder 330 .

The second coil 833 is disposed to face the second magnet 831 in a direction perpendicular to the optical axis direction (Z axis direction). For example, the housing 110 is provided with a through hole 113 in which the second coil 833 is disposed, and the second coil 833 is disposed in the through hole 113 to provide the second magnet 831 and the second magnet 831 . They are arranged to face each other in the axial direction (Y-axis direction). The second coil 833 may be provided on the substrate 170 coupled to the housing 110 (refer to FIG. 4 ).

The second magnet 831 may include a plurality of magnets disposed on both sidewalls of the holder 330 , and the second coil 833 may also include a plurality of coils to correspond to the second magnet 831 . .

The surface of the second magnet 831 facing the second coil 833 may have a first polarity 831a and a second polarity 831b magnetized along a direction perpendicular to the optical axis direction (Z-axis direction). have.

For example, on the surface of the second magnet 831 facing the second coil 833, the first polarity 831a, the neutral region 831c, and the second polarity are sequentially in the first axial direction (X-axis direction). (831b) may be provided. The first polarity 831a may have an N pole or an S pole, and the second polarity 831b may have a polarity opposite to the first polarity 831a (S pole or N pole). A neutral region 831c is provided between the first polarity 831a and the second polarity 831b.

The second magnet 831 and the second coil 833 generate a driving force in a direction perpendicular to a direction facing each other. For example, the second magnet 831 and the second coil 833 generate a driving force in the first axial direction (X-axis direction).

Accordingly, by the driving force of the second magnet 831 and the second coil 833 , the reflection module 300 may be rotated together with the guide member 200 using the second axis (Y axis) as the rotation axis.

The second magnet 831 is disposed behind the first magnet 811 in the optical axis direction (Z-axis direction). For example, the second magnet 831 is disposed closer to the lens module 400 than the first magnet 811 .

The separation distance in the optical axis direction (Z-axis direction) between the center of the second ball member B2 and the neutral region 831c of the second magnet 831 is the center of the second ball member B2 and the first magnet ( 811) is greater than the separation distance in the optical axis direction (Z-axis direction) between the neutral regions 811c.

Therefore, it is possible to rotate the reflection module 300 even with a smaller driving force.

Meanwhile, the first driving unit 810 and the second driving unit 830 generate driving force in a direction perpendicular to each other.

The reflection module 300 may be rotated about a first axis (X axis) as a rotation axis (see FIGS. 9A, 9B and 9C ), and the reflection module 300 and the guide member 200 have a second axis (Y axis). may be rotated together as a rotation axis (see FIGS. 10A, 10B and 10C). For example, the reflection module 300 may be rotated left and right using a first axis (X axis) as a rotation axis, and may be rotated up and down using a second axis (Y axis) as a rotation axis.

Here, referring to FIGS. 4 and 9A to 10C , the camera module 1000 according to an embodiment of the present invention may include a stopper 150 fitted to the protruding wall 112 of the housing 110 . .

The stopper 150 may be provided in the shape of a hook so that the hook portion may be disposed in a state in which it is caught on the upper portion of the protruding wall 112 .

The stopper 150 may limit the rotation range of the reflection module 300 .

Meanwhile, a buffer member 160 may be attached to the stopper 150 . The buffer member 160 may be made of a material having an elastic force. Accordingly, when the reflective module 300 collides with the stopper 150 , shock and noise can be reduced.

Meanwhile, referring to FIGS. 7 and 8A , the length of the first magnet 811 in the optical axis direction (Z axis direction) is shorter than the length of the second magnet 831 in the optical axis direction (Z axis direction). In addition, the length of the first magnet 811 in the first axial direction (X-axis direction) is longer than the length of the second magnet 831 in the first axial direction (X-axis direction).

For example, the first polarity 811a, the neutral region 811c, and the second polarity 811b of the first magnet 811 are elongated in the first axial direction (X-axis direction), and The first polarity 831a, the neutral region 831c, and the second polarity 831b are elongated in the optical axis direction (Z-axis direction).

7 and 8B , the length of the first coil 813 in the optical axis direction (Z axis direction) is shorter than the length of the second coil 833 in the optical axis direction (Z axis direction). In addition, the length of the first coil 813 in the first axial direction (X-axis direction) is longer than the length of the second coil 833 in the first axial direction (X-axis direction).

For example, the first coil 813 has a shape having a length in the first axial direction (X-axis direction), and the second coil 833 has a shape having a length in the optical axis direction (Z-axis direction).

The camera module 1000 according to an embodiment of the present invention uses a closed-loop control method for detecting and feeding back the position of the reflection module 300 .

Accordingly, the first position sensor 815 and the second position sensor 835 are provided to detect the position of the reflection module 300 .

The first position sensor 815 may be disposed in the housing 110 , and may be disposed to face the first magnet 811 . The second position sensor 835 may be disposed in the housing 110 , and may be disposed to face the second magnet 831 .

The types of the first position sensor 815 and the second position sensor 835 may be different from each other. For example, the first position sensor 815 may be a Hall sensor, and the second position sensor 835 may be a TMR (tunnel magnetoresistance) sensor.

The first position sensor 815 may be disposed outside the first coil 813 . For example, the first position sensor 815 may be disposed above the first coil 813 in the first axial direction (X-axis direction).

The first position sensor 815 may be disposed to face the neutral region 811c of the first magnet 811 . On the other hand, the first position sensor 815 faces the neutral region 811c of the first magnet 811 , and part of the first polarity 811a and part of the second polarity 811b of the first magnet 811 . It can also be arranged to face each other.

The second position sensor 835 may be disposed outside the second coil 833 . For example, the second position sensor 835 may be disposed in front of the second coil 833 in the optical axis direction (Z-axis direction). The second position sensor 835 may be disposed between the first coil 813 and the second coil 833 .

The second position sensor 835 may be disposed to face the neutral region 831c of the second magnet 831 . On the other hand, the second position sensor 835 faces the neutral region 831c of the second magnet 831 , and part of the first polarity 831a and part of the second polarity 831b of the second magnet 831 . It can also be arranged to face each other.

The first position sensor 815 detects the position of the reflection module 300 when the reflection module 300 is rotated about the first axis (X axis) as a rotation axis, and the second position sensor 835 is the reflection module ( When the second axis (Y axis) is rotated as the rotation axis, the position of the reflection module 300 is sensed.

Here, the sensitivity of the first position sensor 815 and the sensitivity of the second position sensor 835 are different from each other. For example, the sensitivity of the second position sensor 835 is greater than the sensitivity of the first position sensor 815 .

When the reflective module 300 is rotated about the first axis (X-axis) as the rotation axis, the inclination angle of the reflective surface 312 of the reflective member 310 does not change, but the reflective module 300 moves along the second axis (Y). axis) as the rotation axis, the inclination angle of the reflective surface 312 of the reflective member 310 is changed.

That is, when the reflection module 300 is rotated about the second axis (Y axis) as a rotation axis, the reflection angle of light becomes larger. Accordingly, when the sensitivity of the first position sensor 815 and the sensitivity of the second position sensor 835 are the same, it is difficult to detect the exact position of the reflection module 300 .

Therefore, the camera module 1000 according to an embodiment of the present invention can detect the exact position of the reflection module 300 by making the sensitivity of the second position sensor 835 greater than the sensitivity of the first position sensor 815 . Accordingly, the shake compensation performance can be improved.

The first position sensor 815 may have a sensitivity of less than 1.0 mV/mT. The second position sensor 835 may have a sensitivity of 1.0 mV/mT or more. Alternatively, the second position sensor 835 may have a sensitivity of 2.0 mV/mT or more.

The sensitivity of the position sensor can be measured at room temperature (eg, 25°C) with an input voltage of 3V.

11 is a schematic exploded perspective view of the reflection module, and FIG. 12 is a schematic front view of the reflection module.

11 and 12 , the reflective module 300 includes a reflective member 310 and a holder 330 on which the reflective member 310 is mounted.

The reflective member 310 is configured to change the traveling direction of light. In the present embodiment, the reflective member 310 may be a prism, but may also be provided as a mirror.

The reflective member 310 may have a shape in which a rectangular parallelepiped or a cube is diagonally bisected, and includes an incident surface 311 , a reflective surface 312 , and an exit surface 313 . The reflective member 310 includes three square-shaped surfaces and two triangular-shaped surfaces. For example, the incident surface 311 , the reflective surface 312 , and the exit surface 313 of the reflective member 310 have a rectangular shape, respectively, and both sides 314 and 315 of the reflective member 310 have a substantially triangular shape.

Since the edge at which the incident surface 311 and the exit surface 313 are connected is sharp, there is a risk of being damaged by impact. When the edge at which the incident surface 311 and the exit surface 313 are connected is damaged by impact, a flare phenomenon may be induced due to unintentional reflection of light.

Accordingly, a chamfer may be provided at an edge where the incident surface 311 and the exit surface 313 of the reflective member 310 are connected to prevent the reflective member 310 from being damaged by impact.

For example, the chamfer is formed to have a predetermined angle with respect to the incident surface 311 and the exit surface 313 . An angle between the chamfer and the incident surface 311 and an angle between the chamfer and the exit surface 313 may be an obtuse angle.

Light blocking layers 371 and 372 may be provided on the emission surface 313 . For example, the light blocking layers 371 and 372 may be provided on a portion adjacent to the incident surface 311 of the exit surface 313 and/or on a portion adjacent to the reflective surface 312 of the exit surface 313 .

For example, the light blocking layers 371 and 372 may be provided on the upper edge and/or the lower edge of the emission surface 313 .

The light blocking layers 371 and 372 may be formed by attaching a light blocking film to the emission surface 313 or painting a light blocking material.

Not all light passing through the emission surface 313 is used for image formation, and a flare phenomenon may occur due to light not used for image formation. Accordingly, unnecessary light can be blocked by providing the light blocking layers 371 and 372 on the emission surface 313 .

Even if unnecessary light is blocked through the light blocking layers 371 and 372 , light may be reflected from the edges of the light blocking layers 371 and 372 , and in this case, a flare phenomenon may still occur.

Accordingly, in the present embodiment, the edges of the light blocking layers 371 and 372 may have a curved shape. For example, the edges of the light blocking layers 371 and 372 may have a wave pattern shape. Accordingly, even when light is reflected on the edges of the light blocking layers 371 and 372 , the reflected light can be scattered, thereby preventing a flare phenomenon.

The holder 330 includes a first sidewall 331 and a second sidewall 332 surrounding both sides of the reflective member 310 . The first sidewall 331 is disposed to surround one side 314 of the reflective member 310 , and the second sidewall 332 is disposed to surround the other side 315 of the reflective member 310 .

In addition, the holder 330 has a mounting surface 333 on which the reflective member 310 is mounted. The mounting surface 333 is disposed between the first sidewall 331 and the second sidewall 332 , and the mounting surface 333 may be an inclined surface.

For example, the mounting surface 333 may be an inclined surface inclined by approximately 45° with respect to the optical axis (Z axis) of the plurality of lenses. The reflective surface 312 of the reflective member 310 is coupled to the mounting surface 333 of the holder 330 .

Meanwhile, light passing through the incident surface 311 is reflected by the reflective surface 312 and passes through the exit surface 313 .

However, when light passing through the incident surface 311 is reflected from a portion other than the reflection surface 312 (eg, the side surfaces 314 and 315 of the reflection member 310 ), a flare phenomenon may be induced.

In addition, since not all of the light reflected from the reflective surface 312 is used for image formation, even if the light is reflected from the reflective surface 312 , the light not used for image formation may cause a flare phenomenon.

The camera module 1000 according to an embodiment of the present invention allows the holder 330 to cover a part of the emitting surface 313 of the reflective member 310, thereby preventing the flare phenomenon from occurring due to unnecessary light. have.

The holder 330 includes a cover portion configured to cover a portion of the emission surface 313 of the reflective member 310 .

The cover part includes a first cover part 340 and a second cover part 350 .

The first cover part 340 extends from the first sidewall 331 in a direction perpendicular to the optical axis (Z-axis) (for example, in the second axial direction (Y-axis direction)), and the second cover part 350 includes It extends from the second sidewall 332 in a direction perpendicular to the optical axis (Z-axis) (eg, in the second axial direction (Y-axis direction)). For example, the first cover part 340 and the second cover part 350 are arranged to extend toward each other.

Each of the first cover part 340 and the second cover part 350 covers a portion of the emission surface 313 of the reflective member 310 .

For example, the first cover part 340 may be disposed to surround a portion connected to one side 314 of the reflective member 310 among the exit surfaces 313 of the reflective member 310 , and the second cover part Reference numeral 350 may be disposed to surround a portion of the emitting surface 313 of the reflective member 310 connected to the other side 315 of the reflective member 310 .

Each of the first cover part 340 and the second cover part 350 may have a shape in which an area covering the emission surface 313 of the reflective member 310 increases toward the bottom surface of the housing 110 .

The first cover part 340 and the second cover part 350 have surfaces 341 and 351 facing each other. Surfaces 341 and 351 on which the first cover part 340 and the second cover part 350 face each other may be curved surfaces, respectively.

Surfaces 341 and 351 on which the first cover part 340 and the second cover part 350 face each other may be provided with concave-convex portions or a light blocking layer to scatter light. For example, the uneven portion may be a rough surface formed by corrosion treatment, and the light-shielding layer may be formed by attaching a light-shielding film or painting a light-shielding paint to a surface on which the first cover portion 340 and the second cover portion 350 face each other. can

Unnecessary light may be blocked by the first cover part 340 and the second cover part 350 , and the surfaces 341 and 351 on which the first cover part 340 and the second cover part 350 face each other. Since light can be scattered by the concavo-convex portion provided in the , it is possible to suppress the flare phenomenon.

Meanwhile, the cover part further includes a third cover part 360 . The third cover part 360 may be disposed to cover a part of the emission surface 313 of the reflective member 310 . For example, the third cover part 360 may be disposed to surround a portion connected to the reflective surface 312 of the reflective member 310 among the exit surfaces 313 of the reflective member 310 .

The third cover part 360 is configured to connect the first cover part 340 and the second cover part 350 , and is perpendicular to the optical axis (Z axis) from the end of the mounting surface 333 of the holder 330 . It may extend in a direction (eg, a first axial direction (X-axis direction)).

The third cover part 360 includes a plurality of protrusions 361 . The plurality of protrusions 361 may be arranged to be connected to each other to form a wave pattern shape. A light blocking layer may be provided on the plurality of protrusions 361 . The light blocking layer may be formed by attaching a light blocking film to the plurality of protrusions 361 or painting a light blocking paint.

Unnecessary light may be blocked by the third cover unit 360 , and light may be scattered by the plurality of protrusions 361 of the third cover unit 360 , thereby suppressing a flare phenomenon.

In the camera module according to an embodiment of the present invention, by forming a light-shielding structure on the upper, lower, left, and right edges of the emission surface 313 of the reflective member 310 , it is possible to prevent flare caused by unnecessary light.

13 is an exploded perspective view of a housing and a lens module of a camera module according to an embodiment of the present invention.

4 and 13 , the reflection module 300 and the lens module 400 are disposed in the inner space of the housing 110 . Based on the protruding wall 112 of the housing 110, the reflective module 300 is disposed in the front, and the lens module 400 is disposed in the rear.

The lens module 400 may be moved in the optical axis direction (Z-axis direction) for focus adjustment. A third ball member B3 is disposed between the lens module 400 and the housing 110, and the lens module 400 is guided by the third ball member B3 to be moved in the optical axis direction (Z-axis direction). can

A first guide groove 411 and a second guide groove 119 are provided on a surface of the lens module 400 and the housing 110 facing each other in the first axial direction (X-axis direction). The first guide groove 411 and the second guide groove 119 have a shape having a length in the optical axis direction (Z axis direction).

The third ball member B3 is disposed between the first guide groove 411 and the second guide groove 119 , and is capable of rolling along the first guide groove 411 and the second guide groove 119 .

Accordingly, when a driving force is generated in the optical axis direction (Z-axis direction), the lens module 400 may be guided by the third ball member B3 to move in the optical axis direction (Z-axis direction).

A third driving unit 900 may be provided to move the lens module 400 in the optical axis direction (Z axis direction) (see FIG. 4 ).

The third driving unit 900 includes a third magnet 910 and a third coil 930 .

The third magnet 910 is mounted on the lens module 400 . For example, the third magnet 910 is disposed on the side of the lens module 400 .

The third coil 930 is disposed to face the third magnet 910 in a direction perpendicular to the optical axis direction (Z axis direction). For example, the housing 110 is provided with a through hole 115 in which the third coil 930 is disposed, and the third coil 930 is disposed in the through hole 115 to provide a third magnet 910 and a second They are arranged to face each other in the axial direction (Y-axis direction). The third coil 930 may be provided on the substrate 170 coupled to the housing 110 .

The third magnet 910 may include a plurality of magnets disposed on both sides of the lens module 400 , and the third coil 930 may also include a plurality of coils to correspond to the third magnet 910 . have.

A surface of the third magnet 910 facing the third coil 930 may have a first polarity 911 and a second polarity 913 magnetized along the optical axis direction (Z axis direction).

For example, on the surface of the third magnet 910 facing the third coil 930 , the first polarity 911 , the neutral region 915 , and the second polarity 913 sequentially along the optical axis direction (Z axis direction) ) may be provided. The first polarity 911 may have an N pole or an S pole, and the second polarity 913 may have a polarity opposite to the first polarity 911 (S pole or N pole). A neutral region 915 is provided between the first polarity 911 and the second polarity 913 .

The third magnet 910 and the third coil 930 generate a driving force in a direction perpendicular to a direction facing each other. For example, the third magnet 910 and the third coil 930 generate a driving force in the optical axis direction (Z axis direction).

Accordingly, by the driving force of the third magnet 910 and the third coil 930 , the lens module 400 may be moved in the optical axis direction (Z axis direction).

The camera module 1000 according to an embodiment of the present invention uses a closed-loop control method for detecting and feeding back the position of the lens module 400 .

Accordingly, the third position sensor 950 is provided to detect the position of the lens module 400 .

The third position sensor 950 may be disposed in a hollow formed in the center of the third coil 930 . The third position sensor 950 may be a Hall sensor.

The third position sensor 950 may be disposed to face the neutral region 915 of the third magnet 910 . On the other hand, the third position sensor 950 faces the neutral region 915 of the third magnet 910 , and part of the first polarity 911 and part of the second polarity 913 of the third magnet 910 . It can also be arranged to face each other.

14 is a perspective view illustrating a state in which a case is removed from the camera module according to an embodiment of the present invention.

The camera module 1000 according to an embodiment of the present invention includes a reflection module 300 , a lens module 400 , and an image sensor module 500 . The reflection module 300 , the lens module 400 , and the image sensor module 500 are disposed along the optical axis direction (Z axis direction).

Accordingly, the light whose traveling direction is changed by the reflection module 300 passes through the lens module 400 and is incident on the image sensor 510 .

If the light is unintentionally reflected before being incident on the image sensor 510 , there is a fear that a flare phenomenon may occur due to this.

For example, before the light passing through the lens module 400 reaches the image sensor 510 , the bottom surface of the housing 110 or the inner surface of the case 130 (the surface facing the bottom surface of the housing 110 ) If it hits and is reflected, a flare phenomenon may occur.

That is, a flare phenomenon may occur due to internal reflection occurring in a space between the lens module 400 and the image sensor 510 .

The camera module 1000 according to an embodiment of the present invention includes a light blocking unit 600 to prevent a flare phenomenon due to unintentional reflection of light.

The light blocking unit 600 may be disposed in a space between the lens module 400 and the image sensor module 500 .

Accordingly, even when unintentional light reflection occurs, the light blocking unit 600 can prevent the diffusely reflected light from being incident on the image sensor 510 , thereby suppressing the flare phenomenon.

The light blocking unit 600 may include at least one light blocking plate. In this embodiment, the light blocking unit 600 includes two light blocking plates.

The light blocking unit 600 may include a first light blocking plate 610 and a second light blocking plate 630 . The first light blocking plate 610 and the second light blocking plate 630 are disposed along the optical axis direction (Z axis direction).

The first light blocking plate 610 and the second light blocking plate 630 each have an opening-shaped window through which light passes so that the light passing through the lens module 400 can be incident on the image sensor 510 .

Light used for image formation may pass through a window and be incident on the image sensor 510 , and light that may cause a flare phenomenon may be blocked by the first light blocking plate 610 and the second light blocking plate 630 . have.

Since it is difficult to accurately predict the light diffusely reflected inside the housing 110 , when the light blocking unit 600 is configured with only one light blocking plate, it may not be sufficient to block unnecessary light.

Since the light blocking unit 600 of the camera module 1000 according to an embodiment of the present invention includes a plurality of light blocking plates, the flare phenomenon can be more effectively suppressed than when one light blocking plate is provided.

Meanwhile, referring to FIG. 3A , the inner wall of the window of the first light blocking plate 610 and the inner wall of the window of the second light blocking plate 630 each include an inclined surface.

For example, the inner wall of the window of the first light blocking plate 610 and the inner wall of the window of the second light blocking plate 630 include inclined surfaces having the same inclination direction.

The inner wall of the window of the first light blocking plate 610 and the inner wall of the window of the second light blocking plate 630 may include inclined surfaces such that the size of the window is expanded along the traveling direction of light, respectively.

For example, the size of one side of the window of the first light blocking plate 610 may be smaller than the size of the other side.

In addition, the size of one side of the window of the second light blocking plate 630 may be smaller than the size of the other side.

Here, one side is a side facing the lens module 400 , and the other side is a side facing the image sensor module 500 .

The size of the other side of the window of the first light blocking plate 610 may be larger than the size of the one side of the window of the second light blocking plate 630 .

Meanwhile, even when light is reflected from the surface of the first light blocking plate 610 and/or the surface of the second light blocking plate 630 and is incident on the image sensor 510 , a flare phenomenon may be induced.

Accordingly, concavo-convex portions may be provided on the surface of the first light blocking plate 610 and the surface of the second light blocking plate 630 to scatter light, respectively.

The surface of the first light blocking plate 610 and the surface of the second light blocking plate 630 may be roughened by the uneven portions. For example, the surface of the first light blocking plate 610 and the surface of the second light blocking plate 630 may be rougher than the surface of the housing 110 .

For example, the surface of the first light blocking plate 610 and the surface of the second light blocking plate 630 may be corroded to be rough.

A light blocking layer may be provided on the surface of the first light blocking plate 610 and the surface of the second light blocking plate 630 to block unnecessary light, respectively. For example, the surface of the first light blocking plate 610 and the surface of the second light blocking plate 630 may have a lower reflectance than the surface of the housing 110 . The light blocking layer may be black.

In the above, the configuration and features of the present invention have been described based on the embodiments according to the present invention, but the present invention is not limited thereto, and it is understood that various changes or modifications can be made within the spirit and scope of the present invention. It is intended that such changes or modifications will be apparent to those skilled in the art, and therefore fall within the scope of the appended claims.

1: Portable Electronic Devices
110: housing
130: case
200: guide member
300: reflection module
400: lens module
500: image sensor module
600: light blocking unit
1000: camera module

Claims (16)

a lens module having a plurality of lenses disposed along an optical axis;
a housing accommodating the lens module; and
and a reflection module disposed in front of the lens module and including a reflective member for changing an optical path and a holder on which the reflective member is mounted;
The reflection module is rotatably provided with a first axis and a second axis perpendicular to the optical axis as rotation axes,
A first position sensor for detecting a change in the position of the reflective module with the first axis as a rotational axis and a second position sensor for detecting a position change of the reflective module with the second axis as a rotational axis are disposed in the housing,
The sensitivity of the first position sensor and the sensitivity of the second position sensor are different from each other.
According to claim 1,
The first axis is an axis formed in a thickness direction of the housing, and the second axis is an axis formed in a width direction of the housing,
The sensitivity of the second position sensor is greater than the sensitivity of the first position sensor camera module.
3. The method of claim 2,
The first position sensor has a sensitivity of less than 1.0 mV/mT, and the second position sensor has a sensitivity of 1.0 mV/mT or more.
3. The method of claim 2,
The first position sensor has a sensitivity of less than 1.0 mV/mT, and the second position sensor has a sensitivity of 2.0 mV/mT or more.
According to claim 1,
The first axis is an axis formed in a thickness direction of the housing, and the second axis is an axis formed in a width direction of the housing,
The first position sensor is a Hall sensor, and the second position sensor is a tunnel magnetoresistance (TMR) sensor.
According to claim 1,
a first driving unit for rotating the reflective module using the first axis as a rotation axis; and
A second driving unit for rotating the reflection module using the second axis as a rotation axis;
The first driving unit includes a first magnet disposed on the reflective module and a first coil facing the first magnet,
The second driving unit is a camera module including a second magnet disposed on the reflective module and a second coil facing the second magnet.
7. The method of claim 6,
The first magnet has a shape having a length along the first axis,
A surface of the first magnet facing the first coil has a first polarity, a neutral region, and a second polarity along the optical axis.
8. The method of claim 7,
The first position sensor is a camera module disposed to face the neutral region of the first magnet.
7. The method of claim 6,
The second magnet has a shape having a length along the optical axis,
A surface of the second magnet facing the second coil has a first polarity, a neutral region, and a second polarity along the first axis.
10. The method of claim 9,
The second position sensor is a camera module disposed to face the neutral region of the second magnet.
7. The method of claim 6,
The first magnet and the second magnet are respectively disposed on the sidewall of the holder,
The second magnet is a camera module disposed closer to the lens module than the first magnet.
7. The method of claim 6,
The first driving unit generates a driving force in the direction of the optical axis,
The second driving unit is a camera module for generating a driving force in the direction of the first axis.
According to claim 1,
a guide member disposed between the housing and the reflective module;
a first ball member disposed between the reflection module and the guide member and including a plurality of ball members disposed along the first axis; and
A second ball member disposed between the housing and the guide member, the second ball member including a plurality of ball members disposed along the second axis;
Both sidewalls of the holder protrude along the optical axis to surround the guide member.
a reflective member for changing the light path;
a holder on which the reflective member is mounted;
a housing accommodating the holder;
a first driving unit including a first magnet disposed on the holder and a first coil facing the first magnet; and
a second driving unit including a second magnet disposed on the holder and a second coil facing the second magnet; and
The holder is rotatable about a first axis as a rotation axis by the first driving unit, and is rotatable with a second axis perpendicular to the first axis as a rotation axis by the second driving unit,
A first position sensor facing the first magnet and a second position sensor facing the second magnet are disposed in the housing,
The sensitivity of the first position sensor and the sensitivity of the second position sensor are different from each other.
15. The method of claim 14,
The holder rotates left and right about the first axis as a rotation axis, and rotates up and down with the second axis as a rotation axis,
The sensitivity of the second position sensor is greater than the sensitivity of the first position sensor.
16. The method of claim 15,
The first position sensor is a Hall sensor, and the second position sensor is a tunnel magnetoresistance (TMR) sensor.

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