KR20200047275A - Camera module - Google Patents

Abstract

According to one embodiment of the present invention, provided is a camera module, which comprises: a housing having an internal space; a reflecting module providing a reflecting member and including a flow holder movably supported on an inner wall of the housing to be provided in the inner space; and a lens module provided in the inner space and providing a plurality of lenses aligned in an optical axis direction so that light reflected by the reflective member is incident. The lens module includes a plurality of lens barrels provided by dividing the plurality of lenses, and the plurality of lens barrels can be moved linearly in the optical axis direction, respectively, while being supported by a ball bearing inside the housing. At least two of the plurality of lens barrels may share a guide groove which guides the movement of the ball bearing.

Description

Camera module

The present invention relates to a camera module.

Recently, cameras are basically adopted in portable electronic devices such as smartphones, tablet PCs, and laptops, and the cameras for mobile terminals are equipped with an autofocus function (AF), an image stabilization function (OIS), and a zoom function (Zoom). Is being added.

However, in order to implement various functions, the structure of the camera module is complicated, and the size is increased, so that the size of the portable electronic device on which the camera module is mounted also increases.

In addition, when directly moving the lens or image sensor for image stabilization, it is necessary to take into account both the weight of the lens or image sensor itself and the weight of other members to which the lens or image sensor is attached. , There is a problem that the power consumption is severe.

In addition, in order to implement the auto focus function (AF) and the zoom function (Zoom), a distance of a predetermined length or more must be secured to allow the lens to move in the direction of the optical axis. .

An object according to an embodiment of the present invention is to provide a camera module that is simple in structure and reduces in size while implementing functions such as auto focus adjustment, zoom, and image stabilization.

In addition, to implement a zoom function, even if a plurality of groups of lenses are provided, a camera module in which a plurality of groups of lenses can be easily aligned in an optical axis direction is provided.

A camera module according to an embodiment of the present invention includes a housing having an internal space; A reflection module having a reflection member and including a flow holder movably supported on an inner wall of the housing to be provided in the interior space; And a lens module provided in the interior space and having a plurality of lenses arranged in an optical axis direction so that light reflected by the reflective member is incident. The lens module includes a plurality of lenses divided by the plurality of lenses. It includes a lens barrel, the plurality of lens barrels can be linearly moved in the optical axis direction, respectively, while being supported by a ball bearing inside the housing, and at least two of the plurality of lens barrels move the ball bearings. You can share the guide home you are guiding.

The camera module according to an embodiment of the present invention has a simple structure and a size reduction while implementing functions such as auto focus adjustment, zoom, and image stabilization. In addition, power consumption can be minimized.

Furthermore, in the present invention, even if a plurality of lens groups are provided to implement the zoom function, alignment in the optical axis direction can be easily implemented.

1 is a perspective view of a portable electronic device according to an embodiment of the present invention,
2 is a perspective view of a camera module according to an embodiment of the present invention,
3A and 3B are cross-sectional views of a camera module according to an embodiment of the present invention,
4 is an exploded perspective view of a camera module according to an embodiment of the present invention,
5 is a perspective view of the housing of the camera module according to an embodiment of the present invention,
6A is a perspective view of a reflection module and a lens module coupled to a housing of a camera module according to an embodiment of the present invention,
6B is a perspective view of a reflective module and a lens module coupled to a housing of a camera module according to another embodiment of the present invention,
7 is a perspective view of a drive coil and a sensor mounted substrate coupled to a housing of a camera module according to an embodiment of the present invention,
8 is an exploded perspective view of the rotating plate and the rotating holder of the camera module according to an embodiment of the present invention,
9 is an exploded perspective view of the housing and the rotating holder in the camera module according to an embodiment of the present invention,
10 is an exploded perspective view of a housing and a lens barrel according to an embodiment of the present invention,
11 is a perspective view showing a main substrate and a coil and components mounted thereto according to an embodiment of the present invention,
12 is a perspective view of a portable electronic device according to another embodiment of the present invention.

Hereinafter, embodiments 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, one of ordinary skill in the art who understands the spirit of the present invention may propose other embodiments included within the scope of the spirit of the present invention through addition, change or deletion of components, etc. It will be said to be included within the scope.

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

Referring to FIG. 1, the portable electronic device 1 according to an embodiment of the present invention may be a portable electronic device such as a mobile communication terminal equipped with a camera module 1000, 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 an object.

In this embodiment, the camera module 1000 includes a plurality of lenses, and the optical axis (Z-axis) of the lens is in the thickness direction (Y-axis direction, front surface of the portable electronic device) of the portable electronic device 1. The direction perpendicular to the rear surface (or vice versa) may 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 is equipped with functions such as auto focusing (hereinafter referred to as AF), zoom, and image stabilizing (hereinafter referred to as OIS), the thickness of the portable electronic device 1 is increased. You can avoid it. Accordingly, thinning of the portable electronic device 1 is possible.

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

Since the camera module 1000 including AF, Zoom, and OIS functions needs to be provided with various parts, the size of the camera module is increased compared to the general camera module.

When the size of the camera module 1000 increases, it may be a problem in miniaturization of the portable electronic device 1 on which the camera module 1000 is mounted.

For example, the number of stacked lenses increases for the zoom function of the camera module, and when a plurality of stacked lenses are formed in the thickness direction of the portable electronic device, the thickness of the portable electronic device increases according to the number of stacked lenses. do. Accordingly, if the thickness of the portable electronic device is not increased, the number of laminated lenses cannot be sufficiently secured, and the zoom performance is weakened.

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

However, since the camera module 1000 according to an embodiment of the present invention is disposed such that the optical axes (Z-axis) of a plurality of lenses are perpendicular to the thickness direction of the portable electronic device 1, AF, Zoom, and OIS functions are provided. Even if the camera module 1000 is mounted, the portable electronic device 1 can be thinned.

2 is a perspective view of a camera module according to an embodiment of the present invention, FIGS. 3A and 3B are cross-sectional views of a camera module according to an embodiment of the present invention, and FIG. 4 is a camera module according to an embodiment of the present invention Is an exploded perspective view of

2 to 4, the camera module 1000 according to an embodiment of the present invention includes a reflection module 1100, a lens module 1200, and an image sensor module 1300 provided in the housing 1010. do.

The reflection module 1100 is configured to change the traveling direction of light. For example, the light traveling through the opening 1031 of the cover 1030 covering the camera module 1000 from the top may be changed in a direction to be directed toward the lens module 1200 through the reflection module 1100. To this end, the reflective module 1100 may include a reflective member 1110 that reflects light.

For example, the light incident in the thickness direction (Y-axis direction) of the camera module 1000 is changed by the reflection module 1100 so that the path is substantially coincident with the optical axis (Z-axis) direction.

The lens module 1200 includes a plurality of lenses through which the light whose direction of travel has been changed by the reflection module 1100 passes. In addition, the lens module 1200 includes at least three lens barrels 1210, 1220, and 1230. Autofocus (AF) and zoom function (Zoom) may be implemented according to movement of at least three lens barrels (1210, 1220, 1230) in the optical axis direction (Z-axis).

The image sensor module 1300 includes an image sensor 1310 for converting light passing through a plurality of lenses into an electrical signal and a printed circuit board 1320 on which the image sensor 1310 is mounted. In addition, the image sensor module 1300 may include an optical filter 1340 that filters light incident through the lens module 1200. The optical filter 1340 may be an infrared cut filter.

In the interior space of the housing 1010, a reflection module 1100 is provided in front of the lens module 1200, and an image sensor module 1300 is provided in the rear of the lens module 1200.

2 to 10, the camera module 1000 according to an embodiment of the present invention includes a reflection module 1100, a lens module 1200 and an image sensor module 1300 provided in the housing 1010. do.

Inside the housing 1010, a reflection module 1100, a lens module 1200, and an image sensor module 1300 are sequentially provided from one side to the other. Of course, the housing 1010 is provided with an internal space so that the reflection module 1100, the lens module 1200 and the image sensor module 1300 are interpolated (here, the printed circuit board 1320 having the image sensor module 1300) ) May be attached to the outside of the housing 1010).

For example, as shown in the drawing, the housing 1010 may be integrally provided so that both the reflection module 1100 and the lens module 1200 are interpolated in the interior space. However, the present invention is not limited thereto. For example, a separate housing for interpolating the reflective module 1100 and the lens module 1200 may be interconnected.

 Then, the housing 1010 is covered by the cover 1030 so that the inner space is not visible.

The cover 1030 is provided with an opening 1031 so that light enters, and the light incident through the opening 1031 is changed by the reflection module 1100 to enter the lens module 1200. The cover 1030 may be integrally provided to cover the entire housing 1010, or may be provided as a separate member that covers the reflective module 1100 and the lens module 1200, respectively.

The reflection module 1100 includes a reflection member 1110 that reflects light. Then, the light incident on the lens module 1200 passes through a plurality of lens groups (at least three lens barrels 1210, 1220. 1230) and is converted into electrical signals by the image sensor 1310 and stored.

The housing 1010 includes a reflection module 1100 and a lens module 1200 in an interior space. Accordingly, the interior space of the housing 1010 may be distinguished from each other by the protrusion wall 1007 between the space where the reflection module 1100 is disposed and the space where the lens module 1200 is disposed. In addition, the reflection module 1100 may be provided on the front side based on the protruding wall 1007 and the lens module 1200 may be provided on the rear side. The protruding wall 1007 may be provided in a shape protruding from both sides from the side wall of the housing 1010 to the inner space.

In the case of the reflection module 1100 provided on the front side, the rotating holder 1120 by the attraction force of the pulling yoke 1153 provided on the inner wall surface of the housing 1010 and the pulling magnet 1151 provided on the rotating holder 1120 ) Is supported in close contact with the inner wall surface of the housing 1010. Here, although the illustration of the drawing is omitted, a pulling magnet may be provided in the housing 1010 and a pulling yoke may be provided in the rotating folder 1120, and the structure illustrated in the drawing will be described below for convenience of description.

A first ball bearing 1131, a rotating plate 1130, and a second ball bearing 1133 are provided between the inner wall surface of the housing 1010 and the rotation holder 1120.

In addition, as will be described below, the first ball bearing 1131 and the second ball bearing 1133 are in close contact with the guide grooves 1132, 1133, 1021, and 1121, so that the rotating holder 1120 and the rotating plate 1130 are housed ( When inserted into the interior space of 1010), some space is needed between the rotating holder 1120 and the protruding wall 1007, and after the rotating holder 1120 is mounted on the housing 1010, the pulling yoke and the pulling Since the rotating holder 1120 is in close contact with the inner wall surface of the housing 1010 by the attractive force of the magnet, a little space is left between the rotating holder 1120 and the protruding wall 1007.

Thus, in the present embodiment, while supporting the rotating holder 1120, a hook-shaped stopper 1050 fitted to the protruding wall 1007 may be provided (of course, even without the stopper 1050, the pulling magnet 1151 and the pulling ring) It can be fixed by manpower by the yoke 1153). The stopper 1050 may be provided in a hook shape, and the hook portion may be provided to face the rotation holder 1120 in a state that is hooked on the upper portion of the protruding wall 1007.

The stopper 1050 may serve as a bracket that supports the rotating holder 1120 when the reflective module 1100 is not driven, and additionally rotates the holder 1120 when the reflective module 1100 is driven. It can serve as a stopper 1050 to control the movement of. The stoppers 1050 may be respectively provided on the protruding walls 1007 protruding from both sides. Of course, a space may be provided between the stopper 1050 and the rotation holder 1120 to smoothly rotate the rotation holder 1120. Alternatively, the stopper 1050 may be provided with an elastic material so that the rotation holder 1120 can move smoothly while being supported by the stopper 1050.

In addition, the housing 1010 is provided with a first driving unit 1140 and a second driving unit 1240 for driving the reflection module 1100 and the lens module 1200, respectively. The first driving unit 1140 includes a plurality of coils 1141b, 1143b, and 1145b for driving the reflection module 1100, and the second driving unit 1240 is provided with a plurality of lens modules 1200-1 Includes a plurality of coils (1241b, 1243b, 1245b) for driving-including the lens barrel 1210, the second lens barrel 1220 and the third lens barrel 1230.

Further, since the plurality of coils 1141b, 1143b, 1145b, 1241b, 1243b, and 1245b are provided in the housing 1010 while being mounted on the main substrate 1070, the housing 1010 includes a plurality of coils 1141b, 1143b, A plurality of through-holes 1010a, 1010b, 1010c, 1010d, 1010e, 1010f, 1010g) may be provided so that 1145b, 1241b, 1243b, and 1245b are exposed to the inner space of the housing 1010.

Here, the main substrate 1070 on which a plurality of coils 1141b, 1143b, 1145b, 1241b, 1243b, and 1245b are mounted may be integrally connected as shown in the drawing. In this case, since one terminal is provided, external power and signal connection may be easy. However, the present invention is not limited thereto, and the main substrate 1070 may be provided as a plurality of substrates by separating the substrate on which the coil for the reflection module 1100 is mounted and the substrate on which the coil for the lens module 1200 is mounted. It might be.

The reflection module 1100 may change a path of light incident through the opening 1031. When shooting an image or video, the image may be blurred or the video may shake due to the user's hand shake, etc.In this case, the reflection module 1100 moves the rotating holder 1120 equipped with the reflective member 1110 to correct the user's hand shake, etc. You can. For example, when a shake occurs when an image is taken or a video is recorded due to a user's hand shake or the like, the shake is compensated for by giving the rotation holder 1120 a relative displacement corresponding to the shake.

In addition, since this embodiment does not include a lens or the like, the OIS function is implemented by the movement of the relatively light weight rotary holder 1120, thereby minimizing power consumption.

That is, in the present embodiment, a rotating holder 1120 equipped with a reflective member 1110 without moving a lens barrel or an image sensor provided with a plurality of lenses in order to implement an optical image stabilizer (OIS) function By changing the moving direction of the light by moving, the light corrected for camera shake or the like is incident on the lens module 1200.

The reflection module 1100 includes a rotating holder 1020 provided to be supported on the housing 1010, a reflective member 1110 mounted on the rotating holder 1020, and a first driving unit 1140 moving the rotating holder 1120 It includes.

The reflective member 1110 may change a light traveling direction. For example, the reflective member 1110 may be a mirror or a prism that reflects light (for convenience of description, in the illustration of the drawings related to an embodiment, the reflective member 1110 is illustrated as a prism) ).

The reflective member 1110 is fixed to the rotating holder 1120. The rotating holder 1120 is provided with a mounting surface 1123 on which the reflective member 1110 is mounted.

The mounting surface 1123 of the rotation holder 1120 may be configured as an inclined surface so that a path of light is changed. For example, the mounting surface 1123 may be an inclined surface inclined by 30 to 60 degrees with respect to the optical axis (Z axis) of the plurality of lenses. Then, the inclined surface of the rotating holder 1120 may face the opening 1031 of the cover 1030 through which light is incident.

The rotating holder 1120 equipped with the reflective member 1110 is accommodated in the inner space of the housing 1010 so as to be movable. For example, the rotation holder 1120 may be accommodated in the housing 1010 to be rotatable relative to the first axis (X-axis) and the second axis (Y-axis). Here, the first axis (X-axis) and the second axis (Y-axis) may mean an axis perpendicular to the optical axis (Z-axis), and the first axis (X-axis) and the second axis (Y-axis) are mutually perpendicular It can be one axis.

The rotation holder 1120 has a first ball bearing 1131 and a second axis aligned along the first axis (X axis) to facilitate rotational movement based on the first axis (X axis) and the second axis (Y axis). It is supported by the housing 1010 by a second ball bearing 1133 aligned along the (Y-axis). In the illustration of the drawing, for example, two first ball bearings 1131 aligned along a first axis (X-axis) and two second ball bearings 1133 aligned along a second axis (Y-axis) are disclosed. In addition, the first driving unit 1140 described below may rotate on the basis of the first axis (X-axis) and the second axis (Y-axis).

Here, since one embodiment is provided with a ball bearing for each of the first axis (X axis) and the second axis (Y axis), the two first ball bearings 1131 aligned along the first axis (X axis) are Two second ball bearings 1133 that may be provided in a cylindrical shape extending along the first axis (X-axis) and aligned along the second axis (Y-axis) are cylinders extending along the second axis (Y-axis). It may be provided in a shape. In this case, the shapes of the guide grooves 1021, 1121, 1132, and 1134 may also be provided in a semi-cylindrical shape to correspond to the shapes of the first and second ball bearings.

In addition, the first ball bearing 1131 and the second ball bearing 1133 are provided on the front and rear surfaces of the rotating plate 1130, respectively (or the first ball bearing 1131 and the second ball bearing 1133 are opposite of the rotating plate 1130). It is also possible to be provided by changing the position on the back and front, that is, the first ball bearing 1131 may be aligned along the second axis (Y axis), the second ball bearing 1133, the first axis (X axis), Hereinafter, for convenience of description, described in the structure shown in the drawings), the rotating plate 1130 may be provided between the rotating holder 1120 and the inner surface of the housing 1010.

In addition, the rotating holder 1120 is rotated by the attraction of the pulling magnet 1151 provided in the rotating holder 1120 or the pulling yoke-and the pulling yoke 1153 provided in the housing 1010-or the pulling magnet-. 1130 may be supported on the housing 1010 (of course, the first ball bearing 1131 and the second ball bearing 1133 are also provided between the rotating holder 1120 and the housing 1010).

Guide grooves 1132 and 1134 may be provided on the front and rear surfaces of the rotating plate 1130 such that the first ball bearing 1131 and the second ball bearing 1133 are inserted, and the guide grooves 1132 and 1134 are the first ball bearings ( 1131) may include a first guide groove 1132 in which a part is inserted and a second guide groove 1134 in which a second ball bearing 1133 is partially inserted.

In addition, the housing 1010 may be provided with a third guide groove 1021 so that the first ball bearing 1131 is partially inserted, and a fourth guide groove such that the second ball bearing 1133 is partially inserted into the rotation holder 1120. 1112 may be provided.

The first guide groove 1132, the second guide groove 1134, the third guide groove 1021, and the fourth guide groove 1121 described above rotate the first ball bearing 1131 and the second ball bearing 1133 To facilitate this, it may be provided in a groove shape of a hemisphere or a polygon (polygonal column or polygonal horn).

The first ball bearing 1131 and the second ball bearing 1133 may move in the first guide groove 1132, the second guide groove 1134, the third guide groove 1021, and the fourth guide groove 1121, It can act as a bearing while sliding.

Meanwhile, the first ball bearing 1131 and the second ball bearing 1133 may be a structure that is fixed to at least one of the housing 1010, the rotating plate 1130, and the rotating holder 1120. For example, the first ball bearing 1131 may be fixed to the housing 1010 or the rotating plate 1130, and the second ball bearing 1133 may be fixed to the rotating plate 1130 or the rotating holder 1120.

In this case, the guide groove may be provided only on a member facing the first ball bearing 1131 or the second ball bearing 1133, and in this case, a friction bearing function by sliding rather than rotation of the ball bearing. Can be done.

Here, when the first ball bearing 1131 and the second ball bearing 1133 is a structure provided to be fixed to any one of the housing 1010, the rotating plate 1130 and the rotating holder 1120, the first ball bearing 1131 and the first ball bearing 1131 2 The ball bearing 1133 may be provided in a spherical shape, a hemispherical shape, a round protrusion shape, or the like.

In addition, the first ball bearing 1131 and the second ball bearing 1133 may be separately attached to any one of the housing 1010, the rotating plate 1130, and the rotating holder 1120. Alternatively, the first ball bearing 1131 and the second ball bearing 1133 may be integrally provided when manufacturing the housing 1010, the rotating plate 1130, and the rotating holder 1120.

The first driving unit 1140 generates a driving force so that the rotation holder 1120 is rotatable about two axes.

As an example, the first driving unit 1140 may include a plurality of magnets 1141a, 1143a, 1145a and a plurality of coils 1141b, 1143b, 1145b disposed to face the plurality of magnets 1141a, 1143a, 1145a. have.

When power is applied to the plurality of coils 1141b, 1143b, and 1145b, the plurality of magnets 1141a, due to electromagnetic influence between the plurality of magnets 1141a, 1143a, 1145a, and the plurality of coils 1141b, 1143b, 1145b, 1143a, 1145a) may be rotated on the rotation holder 1120 is mounted on the first axis (X axis) and the second axis (Y axis).

The plurality of magnets 1141a, 1143a, and 1145a are mounted on the rotation holder 1120. For example, some 1141a of the plurality of magnets 1141a, 1143a, and 1145a may be mounted on the lower surface of the rotating holder 1120, and the remaining 1143a, 1145a may be mounted on the side of the rotating holder 1120. .

The plurality of coils 1141b, 1143b, and 1145b are mounted on the housing 1010. For example, the plurality of coils 1141b, 1143b, and 1145b may be mounted to the housing 1010 through the main substrate 1070. That is, the plurality of coils 1141b, 1143b, and 1145b are provided on the main substrate 1070, and the main substrate 1070 is mounted on the housing 1010.

Here, in the drawing, the main substrate 1070 shows an example in which the coil for the reflection module 1100 and the coil for the lens module 1200 are all integrally mounted, but the main substrate 1070 is the reflection module 1100. The coil for the lens and the coil for the lens module 1200 may be separately provided with two or more substrates to be mounted respectively.

In this embodiment, when the rotation holder 1120 is rotated, a closed loop control method that senses and feedbacks the position of the rotation holder 1120 is used.

Therefore, position sensors 1141c and 1143c are required for closed loop control. The position sensors 1141c and 1143c may be hall sensors.

The position sensors 1141c and 1143c are disposed inside or outside each coil 1141b and 1143b, and the position sensors 1141c and 1143c may be mounted on the main substrate 1070 on which the coils 1141b and 1143b are mounted. have.

On the other hand, the main substrate 1070 may be provided with a gyro sensor (not shown) that detects a shaking factor such as a user's hand shake, and a driving circuit element providing a driving signal to a plurality of coils 1141b, 1143b, and 1145b ( Driver IC (not shown) may be provided.

When the rotating holder 1120 rotates based on the first axis (X axis), the rotating plate 1130 rotates while riding on the first ball bearing 1131 in which the ball bearings are arranged along the first axis (X axis). 1120 is rotated in a row (in this case, the rotation holder 1120 does not move relative to the rotating plate 1130).

In addition, when the rotation holder 1120 rotates with respect to the second axis (Y axis), the rotation holder 1120 rotates on the second ball bearing 1133 with the ball bearings arranged along the second axis (Y axis). (In this case, since the rotating plate 1130 does not rotate, the rotating holder 1120 moves relative to the rotating plate 1130).

That is, when rotating about the first axis (X-axis), the first ball bearing 1131 acts, and when rotating about the second axis (Y-axis), the second ball bearing 1133 acts. As shown in the figure, when rotating about the first axis (X-axis), the second ball bearing 1133 aligned with respect to the second axis (Y-axis) cannot be moved while being fitted in the guide groove. This is because when the structure is rotated based on the second axis (Y-axis), the first ball bearing 1131 aligned with respect to the first axis (X-axis) cannot be moved while being fitted in the guide groove.

Light reflected from the reflection module 1100 may be incident on the lens module 1200. In addition, autofocus (AF) or zoom (Zoom) function may be implemented by moving the incident light in the optical axis direction (Z axis) of at least three lens barrels 1210, 1220, and 1230 provided in the lens module 1200. You can.

Referring to the embodiment illustrated in FIG. 6A, the two lens barrels 1210 and 1220 at the rear may be responsible for the zoom function, and the one lens barrel 1230 at the front may be responsible for the autofocus function. Furthermore, the three lens barrels 1210, 1220, and 1230 may be in charge of dividing or overlapping the zoom function and the autofocus function by various combinations.

Of course, it is possible to control various other deformations. For example, referring to the embodiment shown in FIG. 6B, the rear two lens barrels 1210 and 1220 are divided or overlapped, respectively, and are responsible for a zoom function or an autofocus function-for example, two lens barrels 1210, 1220) this combination is responsible for the zoom function, the rearmost lens barrel 1210 additionally takes care of the autofocus function, and one lens barrel 1230 in front of it is fixed to the housing 1010. Can be maintained. Further, although not shown, one of the three lens barrels 1210, 1220, and 1230 maintains a fixed state in the housing 1010, and the remaining two lens barrels are divided or overlapped, respectively, to zoom or autofocus. Can function. In this case, the lens barrel (for example, 1230) fixed to the housing 1010 does not require a driving magnet or a ball bearing interposed between the coil and the housing 1010 facing the driving magnet.

In addition, in the drawings related to the present embodiment, a space in which one lens barrel 1230 in the front and two lens barrels 1210 and 1220 in the rear is provided is a partitioned shape, but is not limited thereto, and three lens barrels 1210 , 1220, 1230) may be provided in the same space or may be provided in different compartments.

The plurality of stacked lens groups provided in the lens module 1200 may be divided into at least three lens barrels 1210, 1220, and 1230, respectively. In addition, even if the plurality of stacked lens groups is provided to be divided into at least three lens barrels 1210, 1220, and 1230, the optical axis is aligned with the Z axis, which is the direction in which light is emitted from the reflection module 1100.

The lens module 1200 includes a second driving unit 1240 to implement autofocus (AF) and zoom functions.

The lens module 1200 includes at least three lens barrels-a first lens barrel 1210, a second lens barrel 1220, and a third lens barrel movably provided in an interior space of the housing 1010 in the optical axis (Z axis) direction. Lens barrel 1230-is provided. In addition, the second driving unit 1240 moves the three lens barrels 1210, 1220, and 1230 in the optical axis (Z-axis) direction with respect to the housing 1010.

The first to third lens barrels 1210, 1220, and 1230 are configured to move in the direction of the optical axis (Z axis) in order to implement an autofocus (AF) or zoom function.

Accordingly, the second driving unit 1240 generates driving force such that the first to third lens barrels 1210, 1220, and 1230 are movable in the optical axis (Z-axis) direction, respectively. That is, the second driving unit 1240 individually moves the first to third lens barrels 1210, 1220, and 1230 in the direction of the optical axis (Z-axis) so that an autofocus (AF) or zoom function is implemented. .

The first to third lens modules 1210, 1220, and 1230 may be provided to be supported on the bottom surface of the housing 1010. For example, all of the first to third lens barrels 1210, 1220, and 1230 may be individually supported on the bottom surface of the housing 1010 through a ball bearing. Hereinafter, the first to third lens barrels 1210, 1220, and 1230 will be mainly described with reference to embodiments in which the bottom surfaces of the housing 1010 are supported by ball bearings, respectively.

For example, the second driving unit 1240 includes a plurality of magnets (1241a, 1243a, 1245a) and a plurality of coils (1241b, 1243b, 1245b) disposed to face the plurality of magnets (1241a, 1243a, 1245a).

When power is applied to the plurality of coils 1241b, 1243b, and 1245b, the plurality of magnets 1241a, due to electromagnetic influence between the plurality of magnets 1241a, 1243a, 1245a, and the plurality of coils 1241b, 1243b, 1245b, 1243a and 1245a) may be divided and mounted to the first to third lens barrels 1210, 1220, and 1230, respectively, to move in the optical axis (Z-axis) direction.

The plurality of magnets 1241a, 1243a, and 1245a are divided and mounted on the first to third lens barrels 1210, 1220, and 1230. For example, the first magnet 1241a is on the side of the first lens barrel 1210, the second magnet 1243a is on the side of the second lens barrel 1220, and the third magnet 1245a is the third lens barrel. It may be mounted on the side of (1210).

The plurality of coils 1241b, 1243b, and 1245b are mounted to the housing 1010 to face the plurality of magnets 1241a, 1243a, and 1245a, respectively. Here, since the plurality of magnets 1241a, 1243a, and 1245a provided in the first to third lens barrels 1210, 1220, and 1230 are each divided on both sides, a plurality of coils 1241b, 1243b, and 1245b are also provided, respectively. It may be provided to be divided on both side walls of the housing 1010 to face.

For example, the plurality of coils 1241b, 1243b, and 1245b are mounted on the main substrate 1070, and the main substrate 1070 may be mounted on the housing 1010.

In this embodiment, when the first to third lens barrels 1210, 1220, and 1230 are moved, a closed loop control method that detects and feedbacks the positions of the first to third lens barrels 1210, 1220, and 1230 is used. do. Therefore, position sensors 1241c, 1243c, and 1245c are required for closed-loop control. The position sensors 1241c, 1243c, and 1245c may be hall sensors.

The position sensors 1241c, 1243c, and 1245c are disposed inside or outside the coils 1241b, 1243b, and 1245b, and the position sensors 1241c, 1243c, and the main board 1070 on which the coils 1241b, 1243b, and 1245b are mounted. 1245c) may be mounted.

Meanwhile, in the drawing, the first lens barrel 1210 and the second lens barrel 1220 are shown to be driven by a pair of coils and magnets, and in this case, a coil and a magnet may be provided on either side. At this time, the size of the coil and the magnet may be slightly increased to enhance driving force, and in this case, a plurality of position sensors 1241c and 1243c may be provided to accurately sense the position. In the drawing, three position sensors 1241c and 1243c are respectively provided inside the coils 1241b and 1243b for driving the first lens barrel 1210 and the second lens barrel 1220.

The first lens barrel 1210 is provided in the housing 1010 so as to be movable in the optical axis (Z axis) direction. For example, a plurality of third ball bearings 1215 are disposed between the first lens barrel 1210 and the bottom surface of the housing 1010.

The plurality of third ball bearings 1215 serve as bearings for guiding the movement of the first lens barrel 1210 in the process of implementing the autofocus (AF) and zoom functions.

The plurality of third ball bearings 1213 are configured to roll in the optical axis (Z axis) direction when a driving force for moving the first lens barrel 1210 in the optical axis (Z axis) direction occurs. Accordingly, the plurality of third ball bearings 1215 guide movement of the first lens barrel 1210 in the optical axis (Z-axis) direction.

On the bottom surface of the housing 1010 facing the first lens barrel 1210, a plurality of guide grooves 1214 and 1013 for receiving the third ball bearings 1215 are formed, some of which are optical axes (Z axis). It may be provided in a long direction.

The plurality of third ball bearings 1215 are accommodated in the guide grooves 1214 and 1013 and sandwiched between the first lens barrel 1210 and the housing 1010.

Some or all of the plurality of guide grooves 1213 and 1013 may be formed to be long in the optical axis (Z-axis) direction. In addition, the cross sections of the plurality of guide grooves 1214 and 1013 may have various shapes such as a round shape and a polygonal shape.

Here, the first lens barrel 1210 is pressed toward the bottom of the housing 1010 so that the plurality of third ball bearings 1215 maintain contact with the first lens barrel 1210 and the housing 1010. To this end, a pulling yoke 1016 may be mounted on the bottom surface of the housing 1010 so as to face the pulling magnet 1216 mounted on the lower surface of the first lens barrel 1210. The pulling yoke 1016 may be a magnetic body. Of course, a pulling magnet may be mounted on the bottom surface of the housing 1010, and a pulling yoke may be mounted on the lower surface of the first lens barrel 1210.

On the other hand, the coil 1241b for driving the first lens barrel 1210 is provided on one side of both sides of the housing 1010. In this case, since the electromagnetic force acts on one side of the first lens barrel 1210. 1 For ease of driving the lens barrel 1210, the pulling magnet 1216 and the pulling yoke 1016 may be provided biased toward one side from the center of the housing 1010. In addition, the first lens barrel 1210 may be provided to extend the portion of the magnet to increase the size of the magnet 1241a in order to increase the driving force to the side of the second lens barrel 1220 in the optical axis direction. Furthermore, the second lens barrel 1220 may also be provided to extend the side of the first lens barrel 1210 in the optical axis direction in order to increase the size of the magnet 1243a in order to improve driving force.

In addition, on the contrary, the coil 1243b driving the second lens barrel 1220 is provided on the other side opposite to one side of both sides of the housing 1010. In this case, the electromagnetic force is applied to the second lens barrel 1220. Since it acts on the side, the pulling magnet 1226 and the pulling yoke 1017 may be biased toward the other side from the center of the housing 1010 for easy driving of the second lens barrel 1220.

Furthermore, the coil 1245b driving the third lens barrel 1230 may also be provided on both sides or one side of the housing 1010, and when provided on only one side, the first and second lens barrels 1210 and 1220 In the same way, for ease of driving of the third lens barrel 1230, the pulling magnet 1236 and the pulling yoke 1017 may be biased toward one side from the center of the housing 1010. However, when the coils driving the lens barrels 1210, 1220, and 1230 are provided on only one of the one side and the other side, and when the coils are provided on both sides, the pulling magnet and the pulling yoke are approximately in the central portion. May be provided.

The second lens barrel 1220 is provided in the housing 1010 so as to be movable in the optical axis (Z axis) direction. For example, the second lens barrel 1220 may be disposed in parallel to the first lens barrel 1210 in the optical axis direction in front of the first lens barrel 1210.

A plurality of fourth ball bearings 1225 are provided between the second lens barrel 1220 and the bottom surface of the housing 1010, and the second lens barrel 1220 is provided to the housing 1010 by the fourth ball bearing 1225. It can slide or move about.

When the driving force is generated such that the second lens barrel 1220 moves in the optical axis (Z-axis) direction, the plurality of fourth ball bearings 1225 may be rolling or sliding in the optical axis (Z-axis) direction of the second lens barrel 1220. It is configured to assist.

A plurality of guide grooves 1224 and 1014 accommodating the fourth ball bearings 1250 are formed on the bottom surfaces of the second lens barrel 1220 and the housing 1010 facing each other, some of which are optical axes (Z-axis). ) Direction.

The plurality of fourth ball bearings 1225 are accommodated in the guide grooves 1224 and 1014 and sandwiched between the second lens barrel 1220 and the housing 1010.

Each of the plurality of guide grooves 1224 and 1014 may be formed to be long in the optical axis (Z-axis) direction. In addition, the cross sections of the plurality of guide grooves 1224 and 1014 may have various shapes such as a round shape and a polygonal shape.

Here, the second lens barrel 1220 is pressed toward the bottom surface of the housing 1010 so that the plurality of fourth ball bearings 1225 maintain contact with the second lens barrel 1220 and the housing 1010.

To this end, a pulling yoke 1017 may be mounted on the bottom surface of the housing 1010 so as to face the pulling magnet 1226 mounted on the second lens barrel 1220. The pulling yoke 1016 may be a magnetic body. Of course, a pulling magnet may be mounted on the bottom surface of the housing 1010, and a pulling yoke may be mounted on the lower surface of the second lens barrel 1220.

The first and second lens barrels 1210 and 1220 may have substantially the same length in the optical axis direction. In addition, the first and second lens barrels 1210 and 1220 have optical axes at the first and second lens mounting units 1210a and 1220a and the first and second lens mounting units 1210a and 1220a, respectively, provided with a lens array. It may include first and second extensions 1210b and 1220b extending in the direction.

In addition, the first and second lens barrels 1210 and 1220 may include first and second magnets 1241a and 1243a in the first and second extensions 1210b and 1220b.

The third lens barrel 1230 is provided in the housing 1010 to be movable in the optical axis (Z axis) direction. For example, the third lens barrel 1230 may be disposed in parallel with the second lens barrel 1220 in the optical axis direction in front of the second lens barrel 1220.

A plurality of fifth ball bearings 1235 is provided between the third lens barrel 1230 and the bottom surface of the housing 1010, and the third lens barrel 1230 is provided to the housing 1010 by the fifth ball bearing 1235. It can slide or move about.

The plurality of fifth ball bearings 1235 is a rolling motion or a sliding motion in the optical axis (Z axis) direction of the third lens barrel 1230 when the driving force is generated such that the third lens barrel 1230 moves in the optical axis (Z axis) direction. It is configured to assist.

A plurality of guide grooves 1234 and 1018 accommodating the fifth ball bearing 1235 are formed on the bottom surfaces of the third lens barrel 1230 and the housing 1010 facing each other, some of which are optical axes (Z-axis). ) Direction.

The plurality of fifth ball bearings 1235 are accommodated in the guide grooves 1234 and 1018 and sandwiched between the third lens barrel 1230 and the housing 1010.

Each of the plurality of guide grooves 1234 and 1015 may be elongated in the optical axis (Z axis) direction. In addition, the cross sections of the plurality of guide grooves 1234 and 1015 may have various shapes such as a round shape and a polygonal shape.

Here, the third lens barrel 1230 is pressed toward the bottom surface of the housing 1010 so that the plurality of fifth ball bearings 1235 maintain contact with the third lens barrel 1230 and the housing 1010.

To this end, a pulling yoke 1018 may be mounted on the bottom surface of the housing 1010 so as to face the pulling magnet 1236 mounted on the third lens barrel 1230. The pulling yoke 1018 may be a magnetic body. Of course, a pulling magnet may be mounted on the bottom surface of the housing 1010, and a pulling yoke may be mounted on the lower surface of the third lens barrel 1230.

On the other hand, the guide grooves 1016, 1017, and 1018 provided in the housing 1010 to guide the movement of the third to fifth ball bearings 1215, 1225, and 1235 are respectively elongated groove shapes extending in the optical axis direction, or at least double. The two may be interconnected guide grooves. When at least two of the three guide grooves 1016, 1017, and 1018 are connected to each other, the first to third lens barrels 1210, 1220, and 1230 can be easily aligned in the optical axis direction.

In the drawing, the guide grooves 1013 and 1014 provided in the movement paths of the first and second lens barrels 1210 and 1220 are provided as guide grooves connected to each other, and the third lens barrel 1230 is provided separately. Are presented as examples. Of course, the present invention is not limited thereto, and only the guide grooves 1014 and 1015 used for the movement of the second and third lens barrels 1210 and 1220 are connected to each other, or all guide grooves 1013, 1014, and 1015 are overall. It may be provided in a connected shape.

On the other hand, the first to third lens barrels 1210, 1220, and 1230 according to this sealing example are sequentially provided in the optical axis direction, and the first and second lens barrels 1210, 1220 are coils on one side or the other, respectively. 1241b, 1243b) and magnets 1241a and 1243a. Further, the third lens barrel 1230 may be provided with coils 1245b and magnets 1245a on both sides in the drawing.

However, the present invention is not limited thereto, and the coil 1245b and the magnet 1245a may be provided only on one side on which the driving units 1241b and 1241a of the first lens barrel 1210 are mounted. This is for disposing the driving units 1245b and 1245a provided in the third lens barrel 1230 as far as possible without being affected by the driving units 1243b and 1243a of the adjacent second lens barrel 1220.

11 is a perspective view showing a main substrate and a coil and components mounted thereto according to an embodiment of the present invention.

Referring to FIG. 11, the main substrate 1070 according to an embodiment of the present invention includes a coil 1141b, 1143b, 1145b for driving the reflection module 1100 of the first driving unit 1140, and a second driving unit ( A plurality of coils 1241b, 1243b, and 1245b for driving the lens module 1200 of 1240 may be mounted on the inner surface. In addition, parts 1078 of various passive elements, active elements, and the like, and a gyro sensor 1079 may be mounted on the outer surface. Accordingly, the main substrate 1070 may be a double-sided substrate.

Specifically, it includes a first side substrate 1071 and a second side substrate 1072, and a bottom substrate 1073 interconnecting the first side substrate 1071 and the second side substrate 1072, which are disposed substantially parallel. In addition, a terminal unit 1074 for external power and signal connection may be connected to any one of the first side substrate 1071, the second side substrate 1072, and the bottom substrate 1073.

The first side substrate 1071 includes a part of a plurality of coils (1143b in the figure, 1143b), a sensor 1143c, and a lens module 1200 of the first driver 1140 for driving the reflective module 1100. A part of the plurality of coils of the second driving unit 1240 for driving (1241b in the illustrated figure) and the sensor 1241c may be mounted.

The second side substrate 1072 includes a part of a plurality of coils of the first driving unit 1140 for driving the reflection module 1100 (1145b in the drawing), and a second driving unit for driving the lens module 1200 Some of the plurality of coils 1240 (1243b, 1245b in the illustrated figure) and the sensors 1243c, 1245c may be mounted.

A coil 1141b for driving the reflection module 1100 of the first driving unit 1140 and a sensor 1141c sensing the position of the reflection module 1100 may be mounted on the bottom substrate 1073.

In the drawing, the parts 1078 of various passive elements, active elements, and the like, and the gyro sensor 1079 are mounted on the first side substrate 1071, but these are shown on the second side substrate 1072. It may be mounted, or may be mounted by being appropriately divided into the first side substrate 1071 and the second side substrate 1072.

In addition, a plurality of coils 1141b, 1143b, 1145b, 1241b, 1243b, 1245b mounted on the first side substrate 1071, the second side substrate 1072, and the bottom substrate 1073 and the position sensing sensors 1141c, 1143c , 1241c, 1243c, 1245c) may be variously distributed and mounted on each substrate according to the design of the camera module.

12 is a perspective view of a portable electronic device according to another embodiment of the present invention.

12, the portable electronic device 2 according to another embodiment of the present invention may be a portable electronic device such as a mobile communication terminal equipped with a plurality of camera modules 500 and 1000, a smart phone, and a tablet PC. have.

In this embodiment, a plurality of camera modules 500 and 1000 may be mounted on the portable electronic device 2.

At least one camera module among the plurality of camera modules 500 and 1000 may be the camera module 1000 according to an embodiment of the present invention described with reference to FIGS. 2 to 10.

That is, in the case of a portable electronic device having a dual camera module, at least one of the two camera modules may be provided as the camera module 1000 according to an embodiment of the present invention.

Through such an embodiment, the camera module according to an embodiment of the present invention and a portable electronic device including the same may implement a function such as auto focus adjustment, zoom, and image stabilization, while having a simple structure and a reduced size. In addition, power consumption can be minimized.

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 to this, and various modifications or changes can be made within the spirit and scope of the present invention. It will be apparent to those skilled in the art, and thus, such changes or modifications are found to fall within the scope of the appended claims.

1, 2: Portable electronic devices
1000: camera module
1010: housing
1100: reflective module
1110: reflective member
1120: rotating holder
1140: first driving unit
1200: lens module
1210: first lens barrel
1220: second lens barrel
1230: third lens barrel
1240: second driving unit
1300: image sensor module

Claims (15)

A housing having an internal space;
A reflection module having a reflection member and including a flow holder movably supported on an inner wall of the housing to be provided in the interior space; And
Included in the interior space, a lens module having a plurality of lenses arranged in the optical axis direction so that the reflected light is incident on the reflective member; includes,
The lens module includes a plurality of lens barrels provided by dividing the plurality of lenses, and the plurality of lens barrels are linearly movable in the optical axis direction, respectively, while being supported by ball bearings inside the housing.
At least two of the plurality of lens barrels are camera modules that share a guide groove for guiding the movement of the ball bearing. According to claim 1,
The guide groove is a camera module provided on the side parallel to the optical axis in the housing. According to claim 1,
At least two lens barrels sharing the guide groove among the plurality of lens barrels implement a zoom function, and any one of them implements an automatic focus adjustment (AF) function. According to claim 1,
At least two lens barrels that share the guide groove among the plurality of lens barrels implement a zoom function, and another lens barrel implements an automatic focus adjustment (AF) function. The method of claim 4
Of the plurality of lens barrels, one lens barrel that implements an automatic focus adjustment (AF) function is provided as a camera module. According to claim 1, The plurality of lens barrel,
A camera module that is a first lens barrel and a second lens barrel sharing the guide groove. The method of claim 6,
A camera module including a plurality of first and second ball bearings between the housing and the first and second lens barrels. The method of claim 7,
The first and second lens barrels are camera modules having first and second magnets that react with coils provided in the housing. According to claim 1,
The ball bearing is provided between the bottom surface of the housing and the plurality of lens barrels,
A camera module provided with a pulling yoke or a pulling magnet on the bottom surface of the housing and the lower surfaces of the plurality of lens barrels, respectively. The method of claim 9,
At least some of the plurality of lens barrels are provided with a driving magnet on only one side,
The pulling yoke or the pulling magnet is a camera module that is biased toward one side where the driving magnet is provided based on the center of the housing. According to claim 1,
At least two lens barrels that share the guide groove among the plurality of lens barrels are provided with the same length in the optical axis direction, a camera module. The method of claim 11,
At least two lens barrels sharing the guide groove among the plurality of lens barrels each include a lens mounting portion and an extension portion extending in the optical axis direction. The method of claim 12,
A camera module in which the driving magnet is disposed in the extension. A housing having an internal space;
A reflection module having a reflection member and including a flow holder movably supported on an inner wall of the housing to be provided in the interior space; And
Included in the interior space, a lens module having a plurality of lenses arranged in the optical axis direction so that the reflected light is incident on the reflective member; includes,
The lens module includes a plurality of lens barrels provided by dividing the plurality of lenses, and the plurality of lens barrels are respectively linearly moved in the optical axis direction by a driving magnet and a driving coil provided in the housing and the lens barrel, respectively. Possible,
A pulling yoke or a pulling magnet is selectively provided on the bottom surface of the housing and the lower surfaces of the plurality of lens barrels, respectively.
The pulling yoke or the pulling magnet is a camera module that is biased toward one side with respect to the center of the housing. The method of claim 14,
At least a part of the plurality of lens barrels, the camera module having a driving magnet on only one side.

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