KR20230163805A - Folded Module and Camera Module including the same - Google Patents

Abstract

A folded module according to an embodiment of the present invention includes a carrier disposed in the housing; a rotating holder equipped with a reflective member and disposed on the carrier; and a sensing unit including a sensing magnet disposed on the rotation holder and a position sensor mounted on the housing to face the sensing magnet, and a first ball member forming a first axis is disposed between the carrier and the rotation holder. The sensing magnet may be arranged so that the center of the sensing magnet is spaced apart from the first axis in at least one of a first axis direction and a second axis direction perpendicular to the first axis direction.

Description

Folded module and camera module including the same {Folded Module and Camera Module including the same}

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

Cameras are basically used in portable electronic devices such as smartphones, tablet PCs, and laptops, and cameras for mobile devices include auto focus (Auto Focus, AF), optical image stabilization (OIS), and zoom. Functions such as Zoom are being added.

Additionally, the camera module is equipped with an actuator that directly moves the lens module or indirectly moves the reflection module (or folded module) including the reflection member to compensate for shaking.

Meanwhile, in recent years, the demand for video shooting using mobile terminals has been rapidly increasing, but with conventional technology, it is difficult to precisely correct the shaking when continuous shaking occurs, such as during video shooting.

In particular, when the subject to be captured moves when shooting a video, there is an inconvenience in that the user has to move the mobile communication terminal directly to adjust the shooting direction of the camera module to the moving subject, and it is also difficult to capture an accurate video.

Accordingly, recent actuators can be configured not only to move the lens module or folded module in a direction intersecting the optical axis, but also to rotate the lens module or folded module using the direction intersecting the optical axis as the rotation axis.

However, in the case of a ball guide type actuator, when a collision occurs between camera module components due to external shock, dents may occur on the contact surface of the ball member, which interferes with the accurate position sensing of the actuator and prevents shaking compensation of the camera module. It causes deterioration of function.

The purpose of an embodiment of the present invention is to provide a folded module with improved shake compensation function and a camera module including the same.

A folded module according to an embodiment of the present invention includes a carrier disposed in the housing; a rotating holder equipped with a reflective member and disposed on the carrier; and a sensing unit including a sensing magnet disposed on the rotation holder and a position sensor mounted on the housing to face the sensing magnet, and a first ball member forming a first axis is disposed between the carrier and the rotation holder. The sensing magnet may be arranged so that the center of the sensing magnet is spaced apart from the first ball member in at least one of a first axis direction and a second axis direction perpendicular to the first axis direction.

The folded module and the camera module including the same according to an embodiment of the present invention may have improved shake correction functions.

1A and 1B are perspective views of a portable electronic device equipped with a camera module according to an embodiment of the present invention.
FIG. 2 is a reference diagram illustrating the shooting angles of a plurality of camera modules mounted in FIG. 1A and/or FIG. 1B.
FIG. 3 is a reference diagram illustrating a capture screen of a plurality of camera modules mounted in FIG. 1A and/or FIG. 1B.
Figure 4 is a perspective view of a camera module according to an embodiment of the present invention.
Figure 5 is an exploded perspective view of a camera module according to an embodiment of the present invention.
Figure 6 is a perspective view of the housing of a camera module according to an embodiment of the present invention.
Figure 7 is a perspective view of a folded module and a lens module combined in a housing of a camera module according to an embodiment of the present invention.
Figure 8 is a perspective view of a folded module of a camera module according to an embodiment of the present invention.
9 and 10 are detailed exploded perspective views of the camera module housing and the folded module according to an embodiment of the present invention.
Figure 11 is a side view of the folded module of the camera module according to an embodiment of the present invention viewed from the first axis direction (X-axis direction).
FIG. 12 is a cross-sectional view taken along line A-A' of FIG. 7, and FIG. 13 is a cross-sectional view taken along line B-B' of FIG. 7.
Figures 14a and 14b are diagrams illustrating positional deviation in the second axis (Y-axis) direction due to dents in the folded module according to an embodiment of the present invention.
Figure 15 is a cross-sectional view illustrating the relative rotation of the carrier with respect to the housing in the camera module according to an embodiment of the present invention.
Figure 16 is a cross-sectional view illustrating the relative rotation of the rotation holder with respect to the carrier in the camera module according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. However, the spirit of the present invention is not limited to the embodiments described below.

For example, a person skilled in the art who understands the spirit of the present invention may suggest other embodiments that are included within the scope of the spirit of the present invention through addition, change, or deletion of components, but this is also within the spirit of the present invention. It should be viewed as included within the scope.

In addition, terms including ordinal numbers such as “first”, “second”, etc. used in this specification may be used to describe various components, but the components are not limited by the terms, and the terms 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 named a second component, and similarly, the second component may also be named a first component.

FIGS. 1A and 1B are perspective views of a portable electronic device equipped with a camera module according to an embodiment of the present invention, and FIG. 2 is a reference illustrating the shooting angles of a plurality of camera modules mounted on FIGS. 1A and/or 1B. 3 is a reference diagram illustrating a capture screen of a plurality of camera modules mounted in FIGS. 1A and/or 1B.

Referring to FIGS. 1A and 1B, the camera module 1000 according to an embodiment of the present invention can be mounted on portable electronic devices 1 and 2.

1A and 1B show a smart phone as an example of the portable electronic devices 1 and 2, but the portable electronic devices 1 and 2 are not limited to this, and any portable electronic device such as a tablet PC or laptop can be classified as a specific product. Not limited.

As shown in FIGS. 1A and 1B, portable electronic devices 1 and 2 may be equipped with a plurality of camera modules to photograph a subject. As an example, the portable electronic devices 1 and 2 may be equipped with a first camera module 1000 and a second camera module 500.

Figure 1a shows an embodiment in which the first camera module 1000 and the second camera module 500 are sequentially mounted along the width direction (relatively short side direction) of the portable electronic device 1, and Figure 1b shows the first camera. An embodiment is shown in which the module 1000 and the second camera module 500 are sequentially mounted along the longitudinal direction (relatively long side direction) of the portable electronic device 2.

1A and 1B, when two camera modules 1000 and 500 are mounted on portable electronic devices 1 and 2, the entrances through which light enters each camera module 1000 and 500 are as close to each other as possible. It can be equipped to do so.

And, as shown in FIG. 2, the first camera module 1000 and the second camera module 500 may have different angles of view. For example, the first camera module 1000 may have a relatively narrow angle of view (e.g., a telephoto camera), and the second camera module 500 may have a relatively wide angle of view (e.g., a wide-angle camera). . Here, the camera module according to an embodiment of the present invention, which will be described later, may be the first camera module 1000.

Additionally, as an example, the first camera module 1000 may have a field of view (θ1) ranging from 9° to 35°, and the second camera module 500 may have a field of view (θ2) ranging from 60° to 120°. You can.

In this way, by designing the two camera modules 1000 and 500 mounted on the portable electronic devices 1 and 2 to have different angles of view, images of the subject can be captured at various depths.

Additionally, the portable electronic devices 1 and 2 shown in FIGS. 1A and 1B may be equipped with a Picture in Picture (PIP) function. As an example, the portable electronic devices 1 and 2 may display an image captured through the first camera module 1000 having a narrower angle of view within an image captured through the second camera module 500 having a wider angle of view. You can.

In other words, the subject of interest can be photographed with a narrow angle of view (this has the effect of enlarging the subject of interest) and displayed within the image captured with a wide angle of view.

At this time, since the subject of interest may move during video recording, the first camera module 1000, which has a relatively narrow angle of view, includes a reflective module (or folded module) that rotates to capture images following the movement of the subject of interest. can do.

In more detail, the light incident on the first camera module 1000 may be reflected by the reflective member of the reflection module and then change the light path to be incident on the lens module.

Additionally, the first camera module 1000 may rotate the reflection module to track the movement of the subject of interest. For example, the reflection module provided in the first camera module 1000 may be rotated based on the first axis (X-axis) and the second axis (Y-axis). Accordingly, the first camera module 1000 can correct shaking that may occur during shooting.

Here, the first axis (X-axis) refers to an axis perpendicular to the optical axis (Z-axis), and the second axis (Y-axis) refers to an axis perpendicular to both the optical axis (Z-axis) and the first axis (X-axis). The first axis (X-axis) and the second axis (Y-axis), which are the rotation axes of the reflection module of the first camera module 1000, may intersect the optical axis (Z-axis), and the first axis (X-axis) may intersect with the optical axis (Z-axis). axis) and the second axis (Y-axis) can meet at approximately one point.

Referring to FIG. 3, the second camera module 500, which has a relatively large angle of view, can photograph a subject in a relatively large area, and the first camera module 1000, which has a relatively small angle of view, can photograph a subject in a relatively small area. You can photograph a subject.

In particular, the first camera module 1000 can photograph the inner area of the wide imaging range (W) captured by the second camera module 500 in the tele imaging range (T1 to T9), and the tele imaging range (T1 to T9) ) can be displayed inside an image (video) captured with a wide imaging range (W). At this time, the tele imaging range (T1 to T9) captured by the first camera module 1000 overlaps part of the inner area and the outside of the wide imaging range (W), or captures the outer area of the wide imaging range (W). It is also possible to take pictures.

Meanwhile, the first camera module 1000 includes a reflection module that rotates about a first axis (X-axis) and a second axis (Y-axis) that intersect the optical axis (Z-axis), so the first camera module 1000 ) may be tilted to the image (video) captured by the second camera module 500 by changing the capturing angle by rotating the folded module.

Among the tele imaging ranges (T1 to T9) shown in FIG. 3, the angle of T1 to T3 or T7 to T9 is changed by rotation of the folded module.

In the case of images (videos) taken with T1 to T3 or T7 to T9 as the subject among the tele imaging range (T1 to T9) taken with the first camera module (1000), the second camera module (500) is used to implement the PIP function. ) You can rotate the captured image (video) so that it is aligned with the captured image (video).

Additionally, the camera modules 1000 and 500 and/or the portable electronic devices 1 and 2 may include a control unit to implement a PIP function or an image editing function.

Figure 4 is a perspective view of a camera module according to an embodiment of the present invention, Figure 5 is an exploded perspective view of a camera module according to an embodiment of the present invention, and Figure 6 is a housing of a camera module according to an embodiment of the present invention. is a perspective view, and Figure 7 is a perspective view of a folded module and a lens module combined with the housing of a camera module according to an embodiment of the present invention.

4 to 7, the camera module 1000 according to an embodiment of the present invention includes a housing 1010, a folded module (or reflection module) 1100 provided in the housing 1010, and a lens module ( 1200), and may include a cover (or shield can) 1030 that covers the housing 1010.

The housing 1010 may be made of a material that is easy to mold. For example, the housing 1010 may be made of plastic.

The housing 1010 may have an internal space in which optical elements are disposed. For example, in the internal space of the housing 1010, the folded module 1100 and the lens module 1200 may be arranged sequentially along the path of light, and although not shown in the drawing, at the rear of the lens module 200 An image sensor module (not shown) may be disposed.

That is, the folded module 1100, the lens module 1200, and the image sensor module (not shown) may be sequentially arranged in the housing 1010 along the path of light.

The inner space of the housing 1010 where the above optical elements are disposed may be surrounded by a cover 1030. In detail, the cover 1030 may be coupled to the housing 1010 in a form that covers the internal space of the housing 1010 while surrounding the side of the housing 1010. Accordingly, optical elements disposed in the inner space of the housing 1010 may not escape to the outside.

Additionally, the cover 1030 may be made of a metal material that has a function of shielding electromagnetic waves.

Accordingly, it is possible to prevent electromagnetic waves generated from the camera module 1000 according to an embodiment of the present invention from affecting other electronic components provided in the portable electronic devices 1 and 2, and on the contrary, the portable electronic devices ( It is possible to prevent electromagnetic waves generated from other electronic components provided in 1 and 2) from affecting the camera module 1000 according to an embodiment of the present invention.

Meanwhile, the cover 1030 may be disposed to face the outside of the portable electronic devices 1 and 2, and the housing 1010 may be disposed to face the inside of the portable electronic devices 1 and 2. Accordingly, the cover 1030 may include an opening 1031 through which light is incident.

The folded module 1100 may be configured to change the direction of light incident through the opening 1031.

To this end, the folded module 1100 may include a reflective member 1155 that reflects light. As an example, the reflecting member 1155 may be a prism or mirror.

Light incident in the thickness direction (Y-axis direction) of the camera module 1000 may be changed by the folded module 1100 so that its path approximately matches the optical axis direction (Z-axis direction). For example, the direction of light incident through the opening 1031 of the cover 1030 shown in FIG. 4 may be changed from the folded module 1100 to the lens module 1200.

The lens module 1200 may include a plurality of lenses stacked in the optical axis direction (Z-axis direction) and at least one lens barrel on which the lenses are mounted. That is, a plurality of lenses may be mounted on one lens barrel or may be mounted separately on two or more lens barrels.

Light incident on the lens module 1200 through the folded module 1100 may pass through a plurality of lenses, and after passing through the plurality of lenses, it reaches the image sensor module (not shown) and is converted into an electrical signal and stored. It can be.

The image sensor module may include an image sensor that converts light passing through a plurality of lenses into an electrical signal and a printed circuit board on which the image sensor is mounted.

Although not shown in the drawing, the image sensor is arranged so that its imaging surface faces the lens module 1200, and the image formed on the imaging surface is converted into an electrical signal by the elements constituting the image sensor, and these electrical signals are converted into electrical signals through a connector ( It may be transmitted to the outside of the camera module 1000 through (not shown).

In addition, the camera module 1000 according to an embodiment of the present invention has a shake correction function as the folded module 1100 rotates in the first axis direction (X-axis direction) or the second axis direction (Y-axis direction). An automatic focus adjustment function or a zoom function may be implemented as at least one lens barrel included in the lens module 1200 moves in the optical axis direction (Z-axis direction).

In relation to the shake compensation function, the reflective member 1155 included in the folded module 1100 according to an embodiment of the present invention has a range of approximately ±10 degrees (total of 20 degrees) based on the first axis (X-axis). degrees) can be rotated, and can be rotated approximately ±25 degrees (total of 50 degrees) about the second axis (Y-axis). That is, the folded module 1100 according to an embodiment of the present invention can be configured to be rotatable in a fairly large range.

Considering this function, the width (or width) (A) of the space where the folded module 1100 is provided in the housing 1010 is longer than the width (B) of the space where the lens module 1200 is provided. It can be formed to have. Referring to FIG. 4, the width of the housing 1010 may refer to the length in the first axis direction (X-axis direction).

Referring again to FIGS. 5 to 7, a folded module 1100 is provided in the front of the lens module 1200 in the inner space of the housing 1010, and an image sensor module (not shown) is located behind the lens module 1200. This can be provided.

Additionally, at least one baffle 1300 may be provided between the lens module 1200 and the image sensor module. The baffle 1300 may be fitted into the housing 1010 and may be provided in the internal space of the housing 1010.

The baffle 1300 can reduce the flare phenomenon by blocking unnecessary light that may enter the image sensor. Specifically, in order to implement a telephoto camera, the focal length may be longer, and accordingly, the distance between the lens module 1200 and the image sensor may become longer.

The baffle 1300 may serve to reduce the size of the optical path to prevent excessive reflection when light passes through the internal space of the housing 1010.

Meanwhile, as shown in the drawing, the camera module 1000 according to an embodiment of the present invention may have an integrated structure in which the folded module 1100 and the lens module 1200 are arranged together in the inner space of the housing 1010.

The housing 1010 is formed to protrude from the inner wall of the housing 1010 toward the internal space and may include a protruding wall 1012 that partitions the space where the folded module 1100 and the lens module 1200 are disposed. there is. The folded module 1100 and the lens module 1200 may each be disposed in a space partitioned by the protruding wall 1012.

In this case, there is no need to separately align the optical axis (Z-axis), and since the folded module 1100 and lens module 1200 are placed in one housing 1010, the number of parts can be reduced and assembly can be convenient. there is.

However, in another embodiment, the camera module 1000 may have a structure in which a housing in which the folded module 1100 is arranged and a housing in which the lens module 1200 is arranged are connected to each other. That is, the folded module 1100 and the lens module 1200 may be placed in different housings.

According to one embodiment of the present invention, the camera module 1000 can implement a shake correction function and an autofocus function by moving the folded module 1100 or the lens module 1200.

Below, the automatic focus adjustment function of the camera module 1000 according to an embodiment of the present invention will first be described.

The automatic focus adjustment function of the camera module 1000 according to an embodiment of the present invention can be implemented by moving the lens module 1200. For example, the lens module 1200 may move relative to the housing 1010 in the optical axis direction (Z-axis direction), and accordingly the distance between the lens module 1200 and the image sensor may change to adjust focus. .

The camera module 1000 may include an automatic focus adjustment driver to move the lens module 1200 in the optical axis direction (Z-axis direction).

The autofocus control driving unit may include an autofocus magnet 1210 and an autofocus coil 1230. The auto focus adjustment magnet 1210 may be placed in the lens module 1200. As an example, the autofocus adjustment magnet 1210 may be disposed on at least one side of the lens module 1200.

The autofocus coil 1230 may be placed in the housing 1010 to face the autofocus magnet 1210. In more detail, the auto-focusing coil 1230 may be placed in the housing 1010 as the main board 1500 is coupled to the housing 1010 while being mounted on the main board 1500. At this time, the housing 1010 may include a through hole 1010c so that the automatic focus adjustment coil 1230 mounted on the main board 1500 is exposed to the internal space of the housing 1010.

In one embodiment of the present invention, the auto-focusing magnet 1210 is disposed in the lens module 1200 and thus may be a moving member, and the auto-focusing coil 1230 may be a fixed member because it is disposed in the housing 1010. However, on the contrary, an embodiment in which the autofocus adjustment magnet 1210 is a fixed member disposed in the housing 1010 and the autofocus coil 1230 is a moving member disposed in the lens module 1200 is also possible.

When current flows through the autofocus coil 1230, the autofocus control driver moves the lens module 1200 in the optical axis direction (Z-axis) by electromagnetic interaction between the autofocus coil 1230 and the autofocus magnet 1210. direction) can reciprocate.

The camera module 1000 according to an embodiment of the present invention uses a closed-loop control method that senses the position of the lens module 1200 and provides feedback when the lens module 1200 is moved. Accordingly, the auto focus control driver may include a position sensor 1250 that measures the position of the lens module 1200. As an example, the position sensor 1250 may be a Hall sensor.

Position sensor 1250 may be placed in housing 1010. As an example, the position sensor 1250 may be mounted on the main board 1500 together with the auto-focusing coil 1230 and placed in the housing 1010 as the main board 1500 is coupled to the housing 1010. there is. Additionally, the position sensor 1250 may be placed inside or outside the autofocusing coil 1230.

The position sensor 1250 can measure the position of the lens module 1200 in the optical axis direction while being fixedly disposed in the housing 1010. For example, the position sensor 1250 is operated by the auto-focusing magnet 1210 provided in the lens module 1200 as the lens module 1200 moves in the optical axis direction (Z-axis direction) with respect to the housing 1010. A change in the strength or direction of the magnetic field can be detected, and the position of the lens module 1200 in the optical axis direction (Z-axis direction) can be measured based on this change.

A plurality of ball members 1270 may be disposed between the lens module 1200 and the housing 1010. The plurality of ball members 1270 may be arranged to be spaced apart in the optical axis direction (Z-axis direction) and the first axis direction (X-axis direction).

The plurality of ball members 1270 maintain the gap between the lens module 1200 and the housing 1010 and guide the movement of the lens module 1200 in the optical axis direction (Z-axis direction) with respect to the housing 1010. You can.

In detail, the lens module 1200 and the housing 1010 include guide grooves 1275 and 1015-1 extending in the optical axis direction (Z-axis direction) on surfaces facing the second axis direction (Y-axis direction). can do. Additionally, the guide grooves 1275 and 1015-1 may have various cross-sectional shapes, such as a curved shape or a polygonal shape. The plurality of ball members 1270 may roll while accommodated in the guide grooves 1275 and 1015-1 to guide the movement of the lens module 1200 in the optical axis direction (Z-axis direction).

Although not shown in the drawing, a magnetic material may be disposed in at least the housing 1010 so that the plurality of ball members 1270 do not escape from the guide grooves 1275 and 1015-1. For example, a magnetic material may be disposed on the bottom of the housing 1010 to face the autofocusing magnet 1210 in the second axis direction (Y-axis direction).

Meanwhile, in relation to the automatic focus adjustment function of the camera module 1000 according to an embodiment of the present invention, the lens module 1200 has been described as moving in the optical axis direction (Z-axis direction) for convenience, but the lens module 1200 The direction of movement may not coincide with the optical axis direction (Z-axis direction). For example, the lens module 1200 may move approximately in the optical axis direction (Z-axis direction) or may move in a direction substantially parallel to the optical axis direction (Z-axis direction).

Next, the shake correction function of the camera module 1000 according to an embodiment of the present invention will be described.

Figure 8 is a perspective view of the folded module of the camera module according to an embodiment of the present invention, Figures 9 and 10 are detailed exploded perspective views of the housing of the camera module and the folded module according to an embodiment of the present invention, and Figure 11 is a side view of the folded module of the camera module according to an embodiment of the present invention as viewed from the first axis direction (X-axis direction).

FIG. 12 is a cross-sectional view taken along line A-A' of FIG. 7, FIG. 13 is a cross-sectional view taken along line B-B' of FIG. 7, and FIGS. 14a and 14b show a cross-sectional view of a folded module according to an embodiment of the present invention. It is a diagram showing the positional deviation in the second axis (Y-axis) direction, Figure 15 is a cross-sectional view illustrating the relative rotation of the carrier with respect to the housing in a camera module according to an embodiment of the present invention, and Figure 16 is a diagram showing the relative rotation of the carrier with respect to the housing in the camera module according to an embodiment of the present invention. This is a cross-sectional view illustrating the relative rotation of the rotation holder with respect to the carrier in the camera module according to an embodiment of the present invention.

The shake correction function of the camera module 1000 according to an embodiment of the present invention can be implemented by moving the folded module 1100. For example, the folded module module 1100 may be tilted in a predetermined range based on the first axis (X-axis) and the second axis (Y-axis) perpendicular to the optical axis with respect to the housing 1010, and accordingly Shaking can be corrected.

According to one embodiment of the present invention, the folded module 1100 may include a carrier 1120 and a rotation holder 1150 accommodated in the carrier 1120. Additionally, a reflective member 1155 may be mounted on the rotation holder 1150.

The reflecting member 1155 may be a prism or mirror as mentioned above.

The reflective member 1155 may rotate about the first axis (X-axis) and the second axis (Y-axis) while mounted on the rotation holder 1150. In detail, the rotation holder 1150 can rotate (pitching) about the first axis (X-axis) with respect to the carrier 1120, and the carrier 1120 can rotate about the second axis (Y-axis) with respect to the housing 1010. It can be rotated based on (Yawing).

The camera module 1000 according to an embodiment of the present invention uses first and second signals to rotate the reflective member 1155 based on the first axis direction (X-axis direction) and the second axis direction (Y-axis direction). It may include a shake compensation driver.

The first shake correction driver may include a first shake correction magnet 1110a and a first shake correction coil 1130a.

The first shake correction magnet 1110a may be placed on the rotation holder 1150. As an example, the first shake correction magnet 1110a may be disposed on one side of the rotation holder 1150. One side of the rotation holder 1150 on which the first shake correction magnet 1110a is disposed may be a side perpendicular to the optical axis direction (Z-axis direction).

Additionally, one side of the rotation holder 1150 on which the first shake correction magnet 1110a is disposed may have a rounded (or rounded) shape. One side of the rotation holder 1150 is the side opposite to the direction in which the reflection member 1155 is mounted, considering that the rotation holder 1150 is placed on the carrier 1120 that rotates about the second axis (Y-axis). It can have this round shape.

Accordingly, the first shake correction magnet 1110a disposed on one side of the rotation holder 1150 may also be provided in a round shape. For example, the first shake correction magnet 1110a may have an arc shape and may be provided to correspond to the arc shape centered on the rotation axis ball 1171b, which will be described later.

Meanwhile, a back yoke 1157 may be further disposed between one side of the rotation holder 1150 and the first shake correction magnet 1110a to concentrate the magnetic flux. The back yoke 1157 may be provided in a shape corresponding to the first shake correction magnet 1110a and may be formed larger than the first shake correction magnet 1110a.

The first shake correction coil 1130a may be disposed in the housing 1010 to face the first shake correction magnet 1110a. For example, the first shake correction coil 1130a may be mounted on the main board 1500 and disposed in the housing 1010 as the main board 1500 is coupled to the housing 1010. At this time, the housing 1010 may include a through hole 1010a so that the first shake correction coil 1130a mounted on the main board 1500 is exposed to the internal space of the housing 1010.

Meanwhile, in one embodiment of the present invention, the main board 1500 may be an integrated board. That is, the main board 1500 includes an automatic focus control coil 1230 for driving the lens module 1200, first and second shake correction coils 1130a and 1130b for driving the folded module 1100, And the position sensors 1140a, 1140b, and 1250 can all be mounted.

Additionally, in one embodiment of the present invention, the main board 1500 may be a double-sided board. That is, the above-described components are mounted on the side facing the internal space of the housing 1010 of the main board 1500, and on the opposite side are various passive elements (not shown), active elements (not shown), and gyro sensors (not shown). ), etc. can be installed.

However, the shape of the main board 1500 is not limited to this, and an embodiment in which the components for driving the lens module 1200 and the components for driving the folded module 1100 are mounted separately on separate boards is also possible.

In one embodiment of the present invention, the first shake correction magnet 1110a is disposed in the rotation holder 1150 and thus is a moving member, and the first shake correction coil 1130a is disposed in the housing 1010, so it may be a fixed member. . However, on the contrary, an embodiment in which the first shake correction magnet 1110a becomes a fixed member disposed in the housing 1010 and the first shake correction coil 1130a becomes a moving member disposed in the rotating holder 1150 is also possible. do.

In one embodiment of the present invention, the first shake correction magnet 1110a may be magnetized to have an N pole and an S pole or an S pole and an N pole in the second axis direction (Y axis direction), and the N pole and the S pole. A neutral area may be provided in between. Additionally, the first shake correction coil 1130a may include a plurality of coils, for example, two coils.

When current flows through the first shake correction coil 1130a, the rotating holder 1150 moves relative to the carrier 1120 by electromagnetic interaction between the first shake correction coil 1130a and the first shake correction magnet 1110a. It can rotate based on the first axis (X axis).

The camera module 1000 according to an embodiment of the present invention uses a closed-loop control method that detects the position of the rotation holder 1150 and provides feedback when the rotation holder 1150 is rotated. Accordingly, the first shake correction driver may include a first position sensor 1140a that measures the position of the rotation holder 1150. As an example, the first position sensor 1140a may be a Hall sensor.

The first position sensor 1140a may be disposed in the housing 1010. As an example, the first position sensor 1140a is mounted on the main board 1500 together with the first shake correction coil 1130a and is attached to the housing 1010 as the main board 1500 is coupled to the housing 1010. can be placed. Additionally, the first position sensor 1140a may be placed inside or outside the first shake correction coil 1130a. As an example, the first position sensor 1140a may be placed between two first shake correction coils 1130a to face the first shake correction magnet 1110a.

The first position sensor 1140a can measure how much the rotation holder 1150 has rotated relative to the first axis (X-axis) while being fixedly disposed in the housing 1010. For example, the first position sensor 1140a may use a first shake correction magnet provided in the rotation holder 1150 as the rotation holder 1150 rotates about the first axis (X-axis) with respect to the carrier 1120. A change in the strength or direction of the magnetic field due to 1110a can be detected, and the position of the rotating holder 1150 in the second axis direction (Y-axis direction) can be measured based on this change.

A plurality of ball members (hereinafter, first ball members) 1170a may be disposed between the rotation holder 1150 and the carrier 1120. The first ball member 1170a may be spaced apart in the first axis direction (X-axis direction).

In detail, the carrier 1120 is provided with supports 1121 on both sides in the first axis direction (X-axis direction), and the rotation holder 1150 is provided on both sides of the carrier 1120 in the first axis direction (X-axis direction). A protrusion 1151 disposed on the support 1121 may be provided.

Additionally, the first ball member 1170a may be disposed between the support portion 1121 of the carrier 1120 and the protrusion 1151 of the rotation holder 1150. In detail, the support portion 1121 and the protrusion 1151 may include guide grooves 1151a and 1121a, respectively, on surfaces facing each other in the second axis direction (Y-axis direction). Accordingly, the guide grooves 1151a and 1121a may also be provided to be spaced apart in the first axis direction (X-axis direction).

The first ball member 1170a may include two ball members, and the two ball members may become the rotation axis of the rotation holder 1150 while accommodated in the guide grooves 1151a and 1121a. Since the first ball member 1170a must form a rotation axis, it can rotate in place in a fixed state without changing its position. To this end, the first ball member 1170a may be supported at three points in at least one of the guide grooves 1151a and 1121a.

Meanwhile, according to one embodiment of the present invention, the stopper 1160 is disposed to cover the support part 1121 while the protrusion 1151 of the rotation holder 1150 is placed on the support part 1121 of the carrier 1120. More may be provided. The stopper 1160 may have a slight gap from the protrusion 1151 so as not to interfere with the rotation of the rotation holder 1150 relative to the carrier 1120.

In addition, the stopper 1160 prevents the rotary holder 1150 from colliding with other members when rotating, and can also serve as a buffering member to absorb shock when colliding.

According to one embodiment of the present invention, the folded module 1100 may include a first pulling means. As an example, the rotation holder 1150 and the carrier 1120 each have magnetic materials 1153 and 1123 on surfaces facing each other in the second axis direction (Y-axis direction) so that the rotation holder 1150 is supported on the carrier 1120. It can be included.

Accordingly, an attractive force may act between the rotation holder 1150 and the carrier 1120 in the second axis direction (Y-axis direction), and the plurality of ball members 1170a are accommodated in the guide grooves 1151a and 1121a. It can maintain contact with the guide groove without breaking away.

The second shake correction driver may include a second shake correction magnet 1110b and a second shake correction coil 1130b.

The second shake correction magnet 1110b may be disposed on the carrier 1120. As an example, the second shake correction magnet 1110b is located on one side of the carrier 1120 perpendicular to one side of the rotating holder 1150 on which the first shake correction magnet 1110a is disposed, that is, on the bottom surface of the carrier 1120. can be placed.

The second shake correction magnet 1110b may be provided in a round shape in consideration of the rotational movement of the carrier 1120. As an example, the second shake correction magnet 1110b may be provided in the shape of a partially cut donut.

Meanwhile, a back yoke 1127 may be further disposed between one surface of the carrier 1120 and the second shake correction magnet 1110b to concentrate the magnetic flux. The back yoke 1127 may be provided in a shape corresponding to the second shake correction magnet 1110b, and may be formed larger than the second shake correction magnet 1110b.

The second shake correction coil 1130b may be disposed in the housing 1010 to face the second shake correction magnet 1110b. For example, the second shake correction coil 1130b may be mounted on the main board 1500 and disposed in the housing 1010 as the main board 1500 is coupled to the housing 1010. At this time, the housing 1010 may include a through hole 1010b so that the second shake correction coil 1130b mounted on the main board 1500 is exposed to the internal space of the housing 1010.

In one embodiment of the present invention, the second shake correction magnet 1110b is disposed on the carrier 1120 and thus may be a moving member, and the second shake correction coil 1130b may be a fixed member because it is disposed on the housing 1010. However, on the contrary, an embodiment in which the second shake correction magnet 1110b is a fixed member disposed in the housing 1010 and the second shake correction coil 1130b is a moving member disposed in the carrier 1120 is also possible. .

In one embodiment of the present invention, the second shake correction magnet 1110b may be magnetized to have N pole, S pole, N pole or S pole, N pole, and S pole along the rotation direction, and the N pole and S pole. A neutral area may be provided in between. That is, the second shake correction magnet 1110b can be magnetized with three poles.

In addition, the second shake correction coil 1130b may include a plurality of coils, for example, two coils, and each coil is connected to the middle S or N pole and the left and right poles of the second shake correction magnet 1110b. It can be placed to face the N or S pole at the right end at the same time.

When a current flows through the second shake correction coil 1130b, the carrier 1120 is held against the housing 1010 by electromagnetic interaction between the second shake correction coil 1130b and the second shake correction magnet 1110b. It can rotate based on two axes (Y axis). At this time, the rotation holder 1150 disposed on the carrier 1120 may rotate with the carrier 1120 about the second axis (Y-axis) with respect to the housing 1010.

The camera module 1000 according to an embodiment of the present invention uses a closed-loop control method that detects the position of the carrier 1120 and provides feedback when the carrier 1120 is rotated. Accordingly, the second shake correction driver may include a second position sensor 1140b that measures the position of the carrier 1120. As an example, the second position sensor 1140b may be a tunnel magnetoresistance angle sensor (TMR angle sensor). Accordingly, the sensing value of the second position sensor 1140b may not be affected by the distance between the second shake correction magnet 1110b and the second position sensor 1140b.

The second position sensor 1140b may be disposed in the housing 1010. As an example, the second position sensor 1140b is mounted on the main board 1500 together with the second shake correction coil 1130b and is attached to the housing 1010 as the main board 1500 is coupled to the housing 1010. can be placed. Additionally, the second position sensor 1140b may be disposed inside or outside the second shake correction coil 1130b. For example, the second position sensor 1140b may be disposed inside the second shake correction coil 1130b to face the second shake correction magnet 1110b.

The second position sensor 1140b can measure how much the carrier 1120 rotates about the second axis (Y-axis) while being fixedly disposed in the housing 1010. For example, the second position sensor 1140b is a second shake correction magnet 1110b provided in the carrier 1120 as the carrier 1120 rotates about the second axis (Y-axis) with respect to the housing 1010. ) can detect a change in the strength or direction of the magnetic field, and based on this change, the position of the carrier 1120 in the first axis direction (X-axis direction) can be measured.

Meanwhile, according to an embodiment of the present invention, a plurality of second position sensors 1140b may be provided in consideration of the relatively large rotation range of the carrier 1120. For example, two second position sensors 1140b may be provided. Additionally, the second position sensor 1140b may be placed close to the rotation axis ball 1171b, which will be described later. Accordingly, the position of the carrier 1120 can be detected more accurately.

A plurality of ball members (hereinafter, second ball members) 1170b may be disposed between the carrier 1120 and the housing 1010. The second ball member 1170b may include at least three ball members.

The rotation axis ball 1171b and the guide ball 1172b may be arranged in a triangular shape, and the second shake correction magnet 1110b may be arranged between the second ball members 1170b. Furthermore, the center of gravity or geometric center of the second shake correction magnet 1110b may exist inside the triangle formed by the second ball member 1170b, and accordingly, the second shake correction magnet 1110b and the pulling yoke (to be described later) When the carrier 1120 is in close contact with the housing 1010 due to the attractive force of 1112, it may not be tilted to one side.

The rotation axis ball 1171b forms the second axis (Y-axis), which is the rotation axis around which the carrier 1120 rotates with respect to the housing 1010, and the guide ball 1172b can help facilitate the rotation of the carrier 1120. . At this time, the second axis (Y-axis) may be perpendicular to the plane on which the second ball member 1170b is disposed.

The rotation axis ball 1171b may be provided as a single ball member and may become the rotation axis of the carrier 1120 when accommodated in the guide grooves 1121b and 1015-2. Since the rotation axis ball 1171b must form a rotation axis, it can rotate in place in a fixed state without changing its position. To this end, the rotation axis ball 1171b may be supported at three points in at least one of the guide grooves 1121b and 1015-2.

There may be a plurality of guide balls 1172b, and they may be provided to roll in a location other than the rotation axis. The guide ball 1172b can guide the movement of the carrier 1120 by rolling while accommodated in the guide grooves 1121c and 1015-3. To this end, the guide grooves 1121c and 1015-3 in which the guide ball 1172b is accommodated may be provided in a form extending along the rotation direction of the carrier 1120. Alternatively, the guide grooves (1121c, 1015-3) may be provided in a straight line approximately along the rotation direction of the carrier 1120, and in this case, the guide ball (1172b) is located in one of the guide grooves (1121c, 1015-3). can be supported by 1 point.

According to one embodiment of the present invention, a pulling yoke 1112 may be provided on the bottom surface of the housing 1010. The pulling yoke 1112 is arranged to face the second shake correction magnet 1110b provided in the carrier 1120 so that an attractive force can be applied in the second axis direction (Y-axis direction), and accordingly, the carrier 1120 is attached to the housing. It can be supported in close contact with the bottom surface of (1010). In addition, the second ball member 1170b can maintain contact with the guide grooves 1121b and 1015-2 without being separated from the state accommodated in the guide grooves 1121b and 1015-2.

In relation to the shake correction function of the camera module 1000 according to an embodiment of the present invention, for convenience, the folded module 1100 is assumed to rotate based on the first axis (X-axis) and the second axis (Y-axis). As described, the rotation direction of the folded module 1100 may not coincide with the first axis (X-axis) and/or the second axis (Y-axis). For example, the folded module 1100 rotates approximately about the first axis (X-axis) or the second axis (Y-axis), or is substantially aligned with the first axis (X-axis) or the second axis (Y-axis). It can rotate about a parallel axis.

According to one embodiment of the present invention, it may include a sensing unit that detects the position of the folded module 1100 in the second axis direction (Y-axis direction).

According to an embodiment of the present invention, the shake correction function of the camera module 1000 is implemented by rotational driving using the first axis (X-axis) and the second axis (Y-axis) of the folded module 1100 as rotation axes. It can be. In other words, the folded module 1100 may be configured to rotate using the first axis (X-axis) and the second axis (Y-axis) as rotation axes.

The first axis (X-axis) and the second axis (Y-axis), which are the rotation axes of the folded module 1100, may be formed by ball members.

In detail, the rotation holder 1150 is configured to rotate relative to the carrier 1120 about a first axis (X-axis), and the first axis (X-axis) may be formed by the first ball member 1170a. there is. The first ball member 1170a may be composed of two ball members spaced apart in the first axis (X-axis) direction, and the two ball members may be disposed between the rotation holder 1150 and the carrier 1120. there is.

The rotation holder 1150 and the carrier 1120 may be provided with guide grooves 1151a and 1121a for receiving the first ball member 1170a on surfaces facing each other in the second axis direction (Y-axis direction). The rotation holder 1150 may be supported on the carrier 1120 in the second axis direction (Y-axis direction) by the first ball member 1170a.

In addition, the carrier 1120 is configured to rotate relative to the housing 1010 about a second axis (Y-axis), and the second axis (Y-axis) is the second ball member 1170b, specifically, the rotation axis ball. It can be formed by (1171b). The rotation axis ball 1171b may be provided as one piece and may be disposed between the carrier 1120 and the housing 1010.

The carrier 1120 and the housing 1010 may be provided with guide grooves 1121b and 1015-2 for accommodating the rotation axis ball 1171b on surfaces facing each other in the second axis direction (Y-axis direction).

Additionally, another second ball member 1170b, specifically, a guide ball 1172b that guides the rotation of the carrier 1120, may be disposed between the carrier 1120 and the housing 1010. The carrier 1120 and the housing 1010 may be provided with guide grooves 1121c and 1015-3 for accommodating the guide ball 1172b on surfaces facing each other in the second axis direction (Y-axis direction). That is, the carrier 1120 may be supported on the housing 1010 in the second axis direction (Y-axis direction) by the second ball member 1170b.

Meanwhile, when an external shock due to a fall, etc. is applied to the camera module 1000, a collision between components may occur. At this time, in the case of a guide groove, a dent may occur due to a difference in hardness from the ball member accommodated in the guide groove.

According to one embodiment of the present invention, the rotation holder 1150 is supported in the second axis direction (Y-axis direction) on the carrier 1120 by the first ball member 1170a, and the carrier 1120 is supported by the second ball member 1170a. Since it is supported in the second axis direction (Y-axis direction) by the housing 1010 by the member 1170b, the position of the folded module 1100 in the second axis direction (Y-axis direction) may be distorted due to the occurrence of dents. .

For example, referring to FIGS. 14A and 14B, the center of the first shake correction magnet 1110a and the center of the first position sensor 1140a, which were arranged side by side in the optical axis (Z-axis) direction according to the occurrence of the dent, are It may be shifted in the two-axis direction (Y-axis direction), and the distance between the second shake correction magnet 1110b and the second position sensor 1140b may be reduced.

In this way, when shaking correction is performed without correction while the initial position of the folded module 1100 is wrong, a difference occurs in the amount of movement of the reflective member 1155, and proper correction cannot be performed.

According to one embodiment of the present invention, the camera module 1000 and/or the folded module 1100 may include a sensing unit to solve the above-described problem.

The sensing unit may include a sensing magnet 1180 and a position sensor 1185 to detect the initial position of the folded module 1100 in the second axis direction (Y-axis direction). The position sensor 1185 can detect the initial position of the sensing magnet 1180 by detecting a change in the strength or direction of the magnetic field.

The sensing magnet 1180 may be placed on one surface of the rotating holder 1150. The sensing magnet 1180 may be disposed on a side different from the side on which the first shake correction magnet 1110a is disposed, in detail, on the protrusion 1151 of the rotation holder 1150.

Additionally, the sensing magnet 1180 may be magnetized to have an N pole and an S pole or an S pole and an N pole in the second axis direction (Y-axis direction), and a neutral area may be provided between the N pole and the S pole. .

Position sensor 1185 may be disposed in housing 1010. As an example, the position sensor 1185 may be mounted on the main board 1500 and placed in the housing 1010 as the main board 1500 is coupled to the housing 1010. Additionally, the position sensor 1185 may be a Hall sensor.

The position sensor 1185 may be placed to face the sensing magnet 1180. For example, the position sensor 1185 may be placed to face the neutral area of the sensing magnet 1180.

According to an embodiment of the present invention, the sensing unit can detect the position of the folded module 1100 in the second axis direction (Y-axis direction) by the ball dent. To this end, the sensing magnet 1180 may be placed on a rotating holder 1150 that has a displacement in the second axis direction (Y-axis direction).

Meanwhile, according to an embodiment of the present invention, the center of the sensing magnet 1180 is oriented in the first axis direction (X) with respect to the first axis (X axis) formed by the first ball member 1170a. They may be arranged to be spaced apart in at least one of the axis direction) and the second axis direction (Y-axis direction).

For example, the center of the sensing magnet 1180 may be placed on the first axis (X-axis). In this case, the sensing magnet 1180 may be disposed outside the first ball member 1170a.

As another example, the center of the sensing magnet 1180 may be arranged to be spaced apart from the first axis (X-axis) in the second axis direction (Y-axis direction). In this case, the center of the sensing magnet 1180 may be disposed above or below the first ball member 1170a with respect to the first ball member 1170a. And, as another example, the center of the sensing magnet 1180 may be placed on a plane extending in the second axis direction (Y-axis direction) perpendicular to the first axis (X-axis). In the above examples, a straight line passing through the center of the sensing magnet 1180 in the second axis direction (Y-axis direction) may intersect the first axis (X-axis) at one point.

That is, the sensing magnet 1180 is arranged so that the center of the sensing magnet 1180 lies on the first axis (X-axis), or the center of the sensing magnet 1180 intersects the first axis (X-axis). It can be arranged to lie on a plane extending in the axial direction (Y-axis direction).

Accordingly, the sensing unit is not affected by changes in the position of the folded module 1100 in the second axis direction (Y-axis direction) due to other factors, and detects the second axis direction (Y-axis direction) of the folded module 1100 due to the ball dent. Y-axis direction) initial position deviation can be sensed.

Meanwhile, according to one embodiment of the present invention, when compensating for shake, the position of the first axis direction (X-axis direction) of the folded module 1100 is set to 0 degrees (deg), and then the folded module ( 1100) position in the second axis direction (Y-axis direction) may be detected.

Detection of the second-axis direction (Y-axis direction) position of the folded module 1100 by the sensing unit can be accomplished by detecting the relative positions of the sensing magnet 1180 and the position sensor 1185. At this time, the amount of change in the sensing value of the sensing unit can be used as a position correction value in the second axis direction (Y-axis direction) of the folded module 1100.

Table 1 shows the position sensing value by the sensing unit when a dent occurs, and Table 2 shows the position sensing value by the sensing unit when a dent occurs after the above-described position correction. According to Tables 1 and 2, when the amount of change in the position sensing value of the sensing unit is used as the position correction value in the second axis direction (Y-axis direction) of the folded module 1100, there is almost no change in the sensing value due to the ball dent. Therefore, even if a ball dent occurs, constant correction is possible.

OIS Y_rot Dent Y_0㎛ Dent Y_40㎛ Dent Y_80㎛ -8 113 107 100 -4 58 49 40 0 -10 -19 -29 4 -75 -83 -90 8 -122 -126 -130

OIS Y_rot Dent Y_0㎛ Dent Y_40㎛ Dent Y_80㎛ -8 113 116 119 -4 58 58 59 0 -10 -10 -10 4 -75 -74 -71 8 -122 -117 -111

As described above, the camera module 1000 according to an embodiment of the present invention can precisely sense the position of the folded module 1100 in the second axis direction (Y-axis direction) due to ball dent and prevent shaking. The shake correction function can be improved by using the position change detected during correction as the position correction value.

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

1000: Camera module
1010: housing
1030: Cover
1100: Folded module
1120: Carrier
1150: Rotating holder
1170a: first ball member
1170b: second ball member
1180: Sensing magnet
1185: Position sensor
1200: Lens module

Claims (10)

A carrier disposed in the housing;
a rotating holder equipped with a reflective member and disposed on the carrier; and
A sensing unit including a sensing magnet disposed on the rotating holder and a position sensor mounted on the housing to face the sensing magnet,
A first ball member forming a first axis is disposed between the carrier and the rotating holder,
The sensing magnet is a folded module arranged so that the center of the sensing magnet is spaced apart from the first ball member in at least one of a first axis direction and a second axis direction perpendicular to the first axis direction. According to paragraph 1,
The rotating holder is supported on the carrier by the first ball member in a second axis direction perpendicular to the first axis direction. According to paragraph 2,
A second ball member forming a second axis perpendicular to the first axis is disposed between the housing and the carrier,
The carrier is supported on the housing in the second axis direction by the second ball member. According to paragraph 1,
It includes a first shake correction magnet disposed in the rotation holder, a first shake correction coil and a first position sensor disposed in the housing to face the first shake correction magnet, and the rotation holder relative to the carrier. A first shake correction driving unit that rotates one axis as a rotation axis; and
It includes a second shake correction magnet disposed in the carrier, a second shake correction coil and a second position sensor disposed in the housing to face the second shake correction magnet, and the carrier is positioned on the first axis with respect to the housing. A folded module comprising a second shake correction driving unit that rotates using a second axis perpendicular to the axis as a rotation axis. According to paragraph 4,
A folded module, wherein the sensing magnet and the first shake correction magnet are disposed on different sides of the rotation holder. According to paragraph 4,
The second position sensor is a tunnel magnetoresistance angle sensor, a folded module. A rotating holder on which a reflective member is mounted and configured to rotate around a first axis as a rotation axis;
a carrier on which the rotation holder is disposed and configured to rotate around a second axis perpendicular to the first axis as a rotation axis;
a housing in which the carrier is placed; and
It includes a sensing magnet disposed on the rotation holder and a position sensor mounted on the housing to face the sensing magnet,
A folded module, wherein at least one of the first axis and the second axis passes through the reflective member. In clause 7,
The sensing magnet is arranged so that a straight line passing through the center of the sensing magnet in the direction of the second axis meets the first axis at a certain point. In clause 7,
a first ball member disposed between the rotation holder and a surface of the carrier facing in a second axis direction to form the first axis; and
It includes a second ball member disposed between the carrier and a surface of the housing facing in the second axis direction to form the second axis,
A folded module in which an adhesive force acts between the rotation holder and the carrier, and between the carrier and the housing in the second axis direction. A camera module comprising a folded module according to any one of claims 1 to 9.