KR20180120894A - Apparatus for driving optical-reflector with multi-axial structure - Google Patents

Abstract

The present invention provides a reflectometer driving device which allows a reflectometer to be precisely driven in all directions for hand shaking. The reflectometer driving device with a multi-axial structure of the present invention comprises: a support frame in which a first groove part rail is formed and in which a first driving magnet is provided; the reflectometer installed in the support frame, and reflecting light to a lens; a middle frame forming a first guide rail corresponding to the first groove part rail and a second groove part rail, and having a second driving magnet; a base frame forming a second guide rail corresponding to the second groove part rail; a first coil moving the support frame in a first direction perpendicular to an optical axis based on the middle frame by generating an electromagnetic force in the first driving magnet; and a second coil moving the middle frame in a second direction perpendicular to the first direction based on the base frame by generating the electromagnetic force in the second driving magnet.

Description

TECHNICAL FIELD [0001] The present invention relates to a multi-

The present invention relates to a reflection-type driving apparatus, and more particularly, to a reflection-type driving apparatus of a multi-axis structure that implements a camera-shake correction by driving a reflection system for changing a light path in a multi-axis direction.

According to the development of hardware technology, user environment, etc., various and complex functions other than basic functions for communication are integrated in a portable terminal (mobile terminal) such as a smart phone.

Typical examples are camera modules implemented with functions such as autofocus (AF), optical image stabilization (OIS), and the like. In recent years, voice recognition, fingerprint recognition, iris recognition And the like are also mounted on a portable terminal. Recently, mounting of a zoom lens in which a plurality of lens groups are assembled is also attempted so that the focal length can be variably adjusted in various ways.

Unlike a general lens, a zoom lens has a structure in which a plurality of lenses or lens groups are arranged in a direction of an optical axis, in which light is introduced, and thus has a longer length in the optical axis direction than a general lens. Light of a subject passing through the zoom lens is introduced into an image pickup device such as a CCD (Charge-coupled Device) or CMOS (Complementary Metal-Oxide Semiconductor) like other lenses and is then generated as image data through subsequent processing.

When the zoom lens is installed in a direction perpendicular to the main board, that is, in a direction perpendicular to the main board of the portable terminal, such as another general lens, the portable terminal is provided with a space corresponding to the height of the zoom lens There is a problem in that it is difficult to optimize the essential characteristics of the miniaturization and weight reduction of the device which the portable terminal is aimed at.

In order to solve such a problem, there is a method of reducing the size of the optical system itself by adjusting the angle, size, spaced distance, focal distance, and the like of the lens, but this method is a method of physically reducing the size of the zoom lens or zoom lens barrel There is an inherent limitation, and there is a problem that the intrinsic characteristics of the zoom lens can be deteriorated.

In addition, the conventional OIS method is a method of correcting and moving the lens or the lens module itself in two directions (X-axis and Y-axis directions) on a plane perpendicular to the optical axis direction (Z-axis) When the zoom lens is directly applied to the zoom lens, the space utilization is low due to the shape, structure and function of the zoom lens, the volume of the device is increased, and the driving precision is difficult to secure.

In order to solve such a problem, a method has been attempted in which a reflection system is axially coupled and the reflection system is rotated in a predetermined direction so that the shake of the captured image is corrected on the basis of a lens or an image pickup element (CCD, CMOS, or the like).

However, in this method, the load of the support itself, to which the reflection system or the reflection system is coupled, acts not only in a specific direction, but also because the force due to this load acts as a differential magnitude depending on the distance traveled by the reflection system. There is a problem that it is difficult to precisely control the correction of the shaking motion because the magnitude of the driving power source for moving and the movement of the reflection system are not functionally proportional to each other.

In addition, when the reflection system does not move linearly, when the hall sensor is used to sense the motion of the magnet mounted on the reflection system, that is, the reflection system, the change in the magnetic field generated in the magnet is not linearly changed But also a problem that the amount of change is small and it is difficult to accurately sense the movement of the reflection system.

In addition, when the magnets for driving each direction of the moving body are used in the same kind, the magnetic fields of the magnets or the driving coils may interfere with each other, thereby causing a problem in precise driving in each direction.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems in the background, and it is an object of the present invention to provide a method and apparatus for controlling the rotation of a ball and a reflection system physically supporting a reflection system, differentiating a magnet structure, And to provide a reflecting system driving apparatus which can precisely drive a reflecting system in all directions for camera shake by applying a guiding structure in a complex manner.

Other objects and advantages of the present invention will become apparent from the following description, and it will be apparent from the description of the embodiments of the present invention. Further, the objects and advantages of the present invention can be realized by a combination of the constitution shown in the claims and the constitution thereof.

According to an aspect of the present invention, there is provided a reflection-type driving apparatus having a multi-axis structure, including: a support frame having a first groove formed therein and having a first driving magnet; A reflection system installed in the support frame and reflecting light to a lens; A middle frame having a first guide rail and a second groove bobbin corresponding to the first groove bobbin and having a second drive magnet; A base frame having a second guide rail corresponding to the second groove guide; A first coil generating an electromagnetic force in the first driving magnet to move the supporting frame in a first direction perpendicular to the optical axis with respect to the middle frame; And a second coil generating an electromagnetic force in the second driving magnet to move the middle frame in a second direction perpendicular to the first direction with respect to the base frame.

In addition, one of the first and second driving magnets of the present invention may be composed of a single pole, and the other one may be composed of more than two poles.

Further, the present invention may be configured such that a sub magnet is disposed on the support frame so as to be spaced apart from the first drive magnet; And the Hall sensor corresponding to the sub-magnet. In this case, the first driving magnet of the present invention has a single-pole surface facing the first coil, and the sub- And the surface facing the sensor may be composed of two or more poles.

According to an embodiment of the present invention, there is provided a magnetic bearing device comprising: a sub magnet disposed on the middle frame so as to be spaced apart from the second drive magnet; And the Hall sensor corresponding to the sub-magnet. In this case, the second driving magnet of the present invention has a single-pole surface facing the second coil, and the sub- May be configured to be two or more poles.

Preferably, the first drive magnet of the present invention may be provided at left and right positions symmetrical with respect to the center of the support frame.

Further, the present invention may be configured such that a first ball is disposed between the first groove guide and the first guide rail; And a second ball disposed between the second groove guide and the second guide rail.

In addition, the middle frame of the present invention may further include a yoke in a direction facing the first driving magnet, and the base frame may further include a yoke in a direction facing the second driving magnet.

In the middle frame of the present invention, the first guide rail may be formed on the inner side and the second groove groove may be formed on the outer side, and the first guide rail and the second groove groove may be perpendicular Direction.

In addition, the first groove groove of the present invention may have a rounded shape, and the support frame may be configured to rotate along a path corresponding to the first groove groove or the first guide rail. The second grooved bore may have a rounded shape and the middle frame may be configured to rotate along a path corresponding to the second groove bore or the second guide rail.

According to an embodiment of the present invention, since the driving in all directions for correcting the shaking motion is implemented in the reflection system that emits light into the lens, a structure for compensating for the shaking motion is provided on the side of the zoom lens or zoom lens carrier having a relatively large size. The size of the apparatus itself can be minimized and the space utilization of the apparatus can be further improved.

According to a preferred embodiment of the present invention, the rotational movement of the reflecting system for changing the light path is physically supported and guided by the guiding structure of the rounded shape and the point contact structure by the ball, It is possible to more flexibly implement the physical rotation movement and to implement the driving power for moving the reflection system and the reflection system functionally proportional to improve the driving precision of the camera shake correction, Can be minimized.

The present invention can independently implement the OIS in the X axis direction and the Y axis direction by organically coupling the structures that rotationally move and support the reflection system, thereby providing an effect that the camera shake can be corrected by adaptively responding to the camera shake in any direction can do.

According to another embodiment of the present invention, the polarities of the driving magnets are different from each other to minimize the mutual magnetic force generated between the driving magnets, so that the OIS driving in the X and Y axis directions is more independent It can be implemented correctly.

Furthermore, according to another preferred embodiment of the present invention, the OIS driving can be implemented more precisely by expanding the magnetic force section sensed by the sensor using the positive magnet magnet as the sensing magnet.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the detailed description of the invention given below, serve to better understand the technical idea of the invention, And shall not be construed as limited to such matters.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an overall structure of an actuator to which a driving device of the present invention is applied;
2 is an exploded view showing a detailed configuration of a driving apparatus according to an embodiment of the present invention,
FIG. 3 is a view showing a coupling relationship between the support frame and the middle frame shown in FIG. 2;
FIG. 4 is a view showing a coupling relationship between the middle frame and the base frame shown in FIG. 2,
5 is a view showing a principle in which the hall sensor senses the magnetic force of the magnet according to the polarity arrangement of the magnet,
6 is a view showing various embodiments of the drive magnet according to the present invention,
Fig. 7 is a view showing an operating relationship of an OIS in the X axis direction of the present invention realized by moving a reflection system (support frame) on the basis of a middle frame;
Fig. 8 is a view showing the operating relationship of the Y-axis direction OIS of the present invention realized by moving the reflection system (middle frame) on the basis of the base frame.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

FIG. 1 is a view showing an overall configuration of an actuator 1000 to which a reflection-type driving apparatus 100 (hereinafter referred to as a driving apparatus) having a multi-axis structure according to the present invention is applied.

The actuator 1000 shown in FIG. 1 includes a driving device 100 of the present invention that implements OIS by moving the reflectometer 110 in both axial directions perpendicular to the optical axis, and a driving device 100 connected to the driving device 100 And a lens driving module 12 mounted with a zoom lens 11 and implementing AF on the zoom lens 11 according to an embodiment.

The driving device 100 according to the present invention may be implemented as a single device, or may be mounted on an upper portion of the lens driving module 12 as an example of the actuator 1000 as shown in FIG. 1 Can be implemented.

The lens 11 may be a zoom lens in which an optical member such as a plurality of lenses or lens groups or a prism, a mirror, etc. may be included as well as a single lens. When the lens 11 is formed of a zoom lens or a zoom lens barrel, Direction (Z-axis direction).

The light path of the object is changed (refraction, reflection, etc.) through the reflection system (110 of FIG. 2) provided in the driving apparatus 100 of the present invention without light of the object or the like directly entering the lens 11, Or the like), and is then introduced into the lens 11.

1, the path of light coming from the outside world is Z1, and the path of the light that is refracted or reflected by the reflector 110 and enters the lens 11 is Z. In the following description, Z is referred to as an optical axis or optical axis direction.

Although not shown in the figure, an imaging device such as a CCD or a CMOS that converts a light signal into an electric signal may be provided below the lens 11 with respect to an optical axis direction, and may block or transmit a light signal of a specific band A filter may be provided together.

As described below, the present invention avoids the conventional OIS method of moving the lens itself in two directions perpendicular to the optical axis Z, namely, the X axis direction (first direction) and the Y axis direction (second direction) Corresponds to a technique of implementing an OIS for the first direction and the second direction in the reflectometer 110 that changes the path of light.

2 is an exploded view showing a detailed structure of a driving apparatus 100 according to an embodiment of the present invention. 2, the driving apparatus 100 of the present invention includes a reflector 110, a support frame 120, a middle frame 130, a base frame 140, a first drive magnet 200, The first yoke 180, the circuit board 10, the first coils 150-1 and 150-3, the second coil 150-2, and the case 15 Lt; / RTI >

First, referring to FIG. 2, the overall structure and coupling relationship of the driving apparatus 100 of the present invention will be described, and the detailed structure of the driving apparatus 100 of the present invention and the OIS driving relationship in each direction will be described later.

As shown in FIG. 2, the light of the foreign object is introduced into the driving apparatus 100 of the present invention through the openings formed in the case 15 through the Z1 path, (Refracted, reflected, or the like) (Z path) by the lens 110 and flows into the lens 11 side.

The reflector 110 that changes the path of light may be selected from a mirror or a prism, or a combination thereof, and may be implemented with various members capable of changing the light incident from the outside world in the direction of the optical axis have. The mirror or the prism is preferably made of glass to improve the optical performance.

As shown in FIG. 2, the driving apparatus 100 of the present invention can refract the path of light by the reflectometer 110 to allow light to enter the lens 11, It can be installed in the longitudinal direction without being installed in the thickness direction of the terminal, so that the thickness of the portable terminal is not increased and the portable terminal can be optimized for miniaturization or slimness.

 The reflector 110 of the present invention is installed in the opening direction of the case 15 into which the light is introduced in the driving device 100, that is, in the direction toward the front surface in the Y-axis direction on the basis of the example shown in FIG.

In the following description, the axis corresponding to the vertical axis direction of the lens 11, that is, the path corresponding to the light entering the lens 11 is defined as an optical axis (Z axis), and two axes on a plane perpendicular to the optical axis (Z axis) And the Y axis.

The reflector 110 is installed on the support frame 120 that physically supports the reflector 110 as shown in FIG. In the support frame 120 of the present invention, the first drive magnet 200 is mounted and a first groove bore 160-1 for guiding rotational movement in the X-axis direction is formed. The configuration for these will be described in detail subsequently.

The support frame 120 physically supporting the reflection system 110 is installed to be physically supported by the middle frame 130 as shown in FIG. 2 in a state where the reflection system 110 is installed .

The support frame 120 is installed to move or rotate in the X-axis direction, which is one of two directions perpendicular to the optical axis, with respect to the middle frame 130, and the support frame 120 The reflection system 110 installed on the support frame 120 also moves together with its physical movement.

In the meantime, the middle frame 130 of the present invention has a structure in which the support frame 120 is rotated in the direction (X-axis direction) with respect to the middle frame 130 among two directions perpendicular to the optical axis with respect to the base frame 140, Axis direction which is perpendicular to the Y-axis direction.

A second drive magnet 210 (see FIG. 4) is provided in the middle frame 130 and a second coil (not shown) for generating an electromagnetic force in the second drive magnet 210 for driving the rotation of the middle frame 130 150-2 are disposed on the circuit board 10 joined at the side of the base frame 140 as illustrated in Fig.

The first coils 150-1 and 150-3 of the present invention are configured to provide a driving force for moving the support frame 120 in the X-axis direction with respect to the middle frame 130, May be applied to various embodiments, but it is preferable that the coil is implemented by using electromagnetic force as a driving force as illustrated in the drawing in consideration of power consumption, low noise, space utilization, and the like.

When the first coils 150-1 and 150-3 are driving sources for moving the support frame 120 in the X-axis direction, the first coils 150-1 and 150- The first drive magnet 200 receiving the electromagnetic force generated by the first drive magnet 200 is provided.

In order to more effectively realize the movement of the support frame 120 in the X-axis direction, as illustrated in the drawings, the first drive magnets 200 may be provided on both sides of the support frame 120, respectively, 150-1 and 150-3 may be provided to face the support frames 120. The first drive magnets 200 and the first coils 150-1 and 150-3 may be disposed on the support frame 120, May be provided only on one side.

The second coil 150-2 in the corresponding viewpoint also provides a driving force for moving the middle frame 130 in the Y axis direction with respect to the base frame 140. In this case, Is provided with a second drive magnet 210 receiving an electromagnetic force generated by the second coil 150-2.

As described above, in order to configure the support frame 120 to move or rotate in the X-axis direction, a first drive magnet 200 is installed on the support frame 120, and the first drive magnet 200 The first coils 150-1 and 150-3 generating an electromagnetic force may be disposed on the circuit board 10 coupled to the base frame 140 as shown in FIG.

The reflector 110 for changing the light incident from the outside world through the structure of the present invention shown in FIG. 2 to the lens side is formed by the first driving magnet 200 and the first coils 150-1 and 150-3 The support frame 120 is rotated in the X-axis direction as the support frame 120 is rotationally moved in the X-axis direction by the electromagnetic force.

The reflector 110 according to the present invention is configured such that as the middle frame 130 rotates in the Y axis direction due to the electromagnetic force generated by the second driving magnet 210 and the second coil 150-2, 130 are rotated in the same direction and are thereby rotated in the Y-axis direction.

Since the support frame 120 of the present invention has a structure capable of independently rotating movement with reference to the middle frame 130, even if the middle frame 130 rotates in the Y axis direction with respect to the base frame 140, When the electromagnetic force is generated in the coils 150-1 and 150-3, the support frame 120 of the present invention can rotate independently in the X-axis direction.

Hereinafter, with reference to FIG. 3, the operation of the support frame 120 according to the present invention will be described in detail with reference to the middle frame 130.

As described above, the support frame 120 of the present invention is configured to move or rotate in the X-axis direction with respect to the middle frame 130. For this purpose, And a first groove bore 160-1 guiding the X-axis rotational movement of the frame 130 to be guided.

Since the camera shake correction is implemented by moving the light of the subject that is introduced into the imaging device side in the direction compensating for the movement caused by the camera-shake, in order to move the light of the subject flowing in the optical axis direction (Z- It is preferable that the movement of the system 110, that is, the support frame 120 to which the reflector 110 is coupled, is configured to be rotationally moved.

To this end, the first groove bore 160-1 formed in the support frame 120 has a rounded shape as shown in the figure and extends in the longitudinal direction of the X-axis, and has an optimized curvature according to the rotation movement .

The middle frame 130 of the present invention, which physically supports the support frame 120 and rotatably supports the support frame 120, includes a first groove bore (not shown) of the support frame 120, A first guide rail 170-1 having a shape corresponding to the first groove blanket 160-1, that is, a rounded shape and extending in the longitudinal direction is formed at a position corresponding to the work 160-1 do.

The support frame 120 of the present invention is rotated and moved along a path corresponding to the first groove guide 160-1 having a rounded shape or the first guide rail 170-1 having a shape corresponding to the first groove guide 160-1, .

When the middle frame 130 is disposed on the upper portion of the support frame 120 or in a vertically folded frame structure according to the embodiment of the present invention, As shown in FIG.

It is preferable that the first groove bore 160-1 and the first guide rail 170-1 of the present invention are arranged in two rows in parallel with each other so that the shaking or clearance of the support frame 120 can be minimized And one cross section may be formed in a V shape and the other cross section may be formed in a U shape or the like.

As shown in FIG. 3, a plurality of first balls 240-1 are disposed between the first groove guide 160-1 and the first guide rail 170-1. The support frame 120 and the middle frame 130 of the present invention can maintain a state of being spaced apart from each other at a predetermined distance through the arrangement of the first and second contact portions 240-1 to 240-1, The supporting frame 120 according to the present invention can be rotated in the X-axis direction with respect to the middle frame 130.

The first ball 240-1 may have a first groove bore 160-1 as illustrated in Figure 3 to reduce the distance between the support frame 120 and the middle frame 130 as appropriate. Or a portion of the first guide rail 170-1 may be accommodated in the first guide rail 170-1.

The support frame 120 of the present invention is provided with a first drive magnet 200. The first drive magnet 200 includes first coils 150-1 and 150-3 disposed on the circuit board 10, And the support frame 120 of the present invention rotates about the middle frame 130 with the electromagnetic force as a driving force.

The position of the first driving magnet 200 (the reflecting system 110 mounted on the supporting frame 120 provided with the first driving magnet 200) is set in the circuit board 10 by a Hall effect The Hall sensor 250-1 detects the position of the first driving magnet 200. When the hall sensor 250-1 detects the position of the first driving magnet 200, the driving driver (not shown) Feedback control is performed so that a power source having an appropriate magnitude and direction corresponding to the position of the driving magnet 200 is applied to the first coils 150-1 and 150-3. The Hall sensor 250-2 (see FIG. 2) that senses the position of the second drive magnet 210 as described later is also the same.

Through this method, the correct position of the reflection system 110 and the corresponding power application are mutually feedback-controlled, so that the camera shake correction function in the first direction (X-axis direction) can be precisely implemented. The driving driver (not shown) may be implemented in a form independent of the hall sensors 250-1 and 250-2, but may be implemented in the form of one chip or module together with the Hall sensors 250-1 and 250-2 have.

Hereinafter, for the sake of explanation and understanding, the hall sensor is divided into a first hall sensor 250-1 and a second hall sensor 250-2 according to an object recognized by the hall sensor. That is, the Hall sensor for sensing the position of the first driving magnet 200 or the sub-magnet 220 for position sensing, which may be provided in the support frame 120, as will be described later, is connected to the first hall sensor 250-1 And a Hall sensor for sensing the position of the second driving magnet 210 or the position sensing sub-magnet 230 that may be provided in the middle frame 130 as described later is referred to as a second hall sensor 250-2. Quot;

Meanwhile, the middle frame 130 of the present invention may be provided with a first yoke 180 such as a metal having a magnetic property at a position facing the first driving magnet 200. The first yoke 180 generates the attraction force with the first driving magnet 200 provided on the support frame 120 and pulls the support frame 120 in the direction of the middle frame 130. Accordingly, 120 are continuously point-contacted with the first ball 240-1 and the support frame 120 can be effectively prevented from being deviated to the outside.

The balance of the support frame 120 in the horizontal direction (refer to FIG. 3) is maintained and the camera shake correction driving force by the first coils 150-1 and 150-3 and the first driving magnet 200 is realized more precisely 3, the first driving magnet 200 is provided on each of the left and right sides of the support frame 120 and is provided at a position symmetrical to the center of the support frame 120 desirable.

When the X-axis camera-shake correction driving is terminated, the support frame 120, that is, the reflection system 110 can be returned to a predetermined position with respect to the middle frame 130, It is preferable that the first driving magnet 180 is arranged to face the left and right first driving magnets 200, respectively.

FIG. 4 illustrates a middle frame 130, a base frame 140, and related configurations according to an embodiment of the present invention. Referring to FIG. 4, the middle frame 130 of the present invention is referred to as a base frame 140 140 in the Y-axis direction will be described in detail.

The middle frame 130 of the present invention is an object physically supporting the rotational movement of the support frame 120 in the X-axis direction as described above. Simultaneously, when the base frame 140 is referred to as the reference, And also functions as a moving rotating body.

4, the middle frame 130 of the present invention includes a second driving magnet 210 receiving an electromagnetic force generated from the second coil 150-2, and the Y frame Y of the middle frame 130 itself A second groove bore 160-2 is formed in the middle frame 130 so that the axial rotational movement is guided.

The base frame 140 of the present invention receives the middle frame 130 and physically supports the rotation of the middle frame 130 in the Y axis direction so that the rotational movement of the middle frame 130 is effectively guided. The base frame 140 is provided with a second guide rail 170-2 having a shape corresponding to the second groove bore 160-2.

The second coil 150-2 of the present invention is configured such that the middle frame 130 moves in the second direction (Y axis direction) perpendicular to the first direction (X axis direction) with respect to the base frame 140 The middle frame 130 of the present invention moves or rotates in the second direction (Y axis direction) with respect to the base frame 140 by the electromagnetic force.

As described above, the second groove rail 160-2 provided in the middle frame 130 and the second guide rail 170-2 provided in the base frame 140 have mutually corresponding shapes, that is, Z axis And is configured to have a rounded shape or an optimized and mutually corresponding curvature so that the rotational movement of the middle frame 130 is effectively supported.

The middle frame 130 of the present invention may be formed by the structure of the second groove bore 160-2 and the second guide rail 170-2 in the same manner as the second groove bore 160-2 or the second guide rail 170-2. And is rotated along the path corresponding to the rail 170-2.

The second groove bore 160-2 and the second guide rail 170-2 are provided with a plurality of (two or more) guide rails 170-2 so that the middle frame 130 of the present invention can be more flexibly and precisely rotationally moved in the Y- Second balls 240-2 are disposed.

The second ball 240-2 moves the middle frame 130 of the present invention with minimized frictional force and maintains a proper distance from the base frame 140.

The middle frame 130 may be formed so as to effectively maintain the point contact with the second ball 240-2 without detaching the middle frame 130 from the base frame 140 as in the first yoke 180 described above. And a second yoke 190 for pulling the second driving magnet 210 of the first driving magnet 210 in the direction of the base frame 140.

In order that the middle frame 130 supports the rotation movement of the support frame 120 and the rotation movement of the middle frame 130 relative to the base frame 140 is realized independently, It is preferable that the first guide rail 210 is provided on a surface of the middle frame 130 which is different from the surface provided with the first guide rail 170-1.

 The second groove bore 160-2 guiding the rotation of the middle frame 130 relative to the base frame 140 is also provided with the first guide rail 170-1 It is preferable that it is provided on the other surface than the surface. That is, as illustrated in the accompanying drawings, the first guide rail 170-1 is formed on the inner side of the middle frame 130, and the second groove bore 160-2 is formed on the first guide rail 170 -1) is not formed on the outer surface of the substrate.

The first groove bore 160-1 provided in the support frame 120 and the second groove bore 160b provided in the support frame 120 may be formed so that the movement of the support frame 120 in the X-axis direction and the movement of the middle frame 130 in the Y- And the second groove bore 160-2 provided in the frame 130 may be formed in a direction perpendicular to each other.

A second Hall sensor 250-2 sensing the position of the second driving magnet 210 may be provided on the circuit board 10 to sense the position of the middle frame 130 in the Y-axis direction.

The second Hall sensor 250-2 senses the position of the second driving magnet 210, that is, the position of the middle frame 130 provided with the second driving magnet 210 and the position of the reflecting system 110 .

The second hall sensor 250-2 is provided on the middle frame 130, that is, on the middle frame 130 according to the embodiment, since the height (position) It is preferable to detect the position of the end of the middle frame 130 in order to sense the position of the reflector 110 more effectively.

To this end, the sub magnet 230 is provided at an end of the middle frame 130, that is, at a position spaced apart from the second driving magnet 210, and the second hall sensor 250-2 is provided to the sub magnet 230, It is preferable to detect the position of the sensor.

Hereinafter, for convenience of explanation and understanding, the sub-magnet is divided into a first sub-magnet 220 and a second sub-magnet 230 according to an object provided with the sub-magnet. That is, the sub-magnet provided in the support frame 120 is referred to as a first sub-magnet 220, and the sub-magnet provided in the middle frame 130 is referred to as a second sub-magnet 230.

As described above, the reflector 110 of the present invention reflects incident light in the direction of an optical axis (Z-axis), and the base frame 140 of the present invention has a structure in which the reflector 110 is divided into two axes And supports the reflection system 110 so as to be movable in the direction (X-axis and Y-axis).

The support frame 120 of the present invention supports the reflector 110 and is movably mounted on the base frame 140 in a uniaxial direction as described above. And is positioned between the frame 140 and the support frame 120 to support the reflector 110 so as to be movable in a direction perpendicular to the movement direction of the support frame 120. [

The supporting frame 120 and the middle frame 130 are disposed perpendicular to each other through a structure in which the middle frame 130 is disposed between the supporting frame 120 and the base frame 140 to which the reflector 110 is coupled, Direction, and the reflection system 110 is configured to rotate in the X-axis and Y-axis directions perpendicular to the optical axis, thereby realizing the camera shake correction.

Hereinafter, a driving magnet (first driving magnet 200, second driving magnet 210), a sensing magnet (a first sub magnet 220, a second sub magnet 220, and a second sub magnet 200) according to various embodiments of the present invention will be described with reference to FIG. The magnet 230, and the Hall sensors (the first hall sensor 250-1 and the second hall sensor 250-2) will be described in detail. 5, the principle that the hall sensor senses the position of the magnet will be briefly described according to the polarity arrangement of the magnet.

5 (a) is a graph showing a range of magnetic force sensed by the hall sensor when a single-pole magnet is used as a magnet for sensing the hall sensor. FIG. 5 (b) A graph showing a magnetic force range sensed by the hall sensor when a magnet is used.

In the following description, the case where the magnetic pole of the magnet exposed to the Hall sensor, that is, the magnetic pole face of the magnet facing the hall sensor is formed of one pole (one of N poles or S poles) is referred to as a unipolar magnet, The case where the pole face of the magnet to be exposed, that is, the pole face of the magnet facing the hall sensor is composed of a plurality of poles, is referred to as a multipolar magnet.

In other words, the multipolar magnet refers to a magnet arranged so that both the N pole and the S pole face the Hall sensor. According to the embodiment, the magnet having two or more N poles and two or more S poles arranged so as to face the hall sensor .

When a coil for generating an electromagnetic force is referred to as a magnet as described later, a magnet having a single pole face facing the coil corresponds to the above-described unipolar magnet, and the face facing the coil has a plurality of poles The resulting magnet corresponds to the above-described multipolar magnet.

5 (a) and 5 (b), Pr denotes the distance between the Hall sensor and the magnet at an initial position (default) in which there is no movement of the magnet. Normally, when the distance between the magnet and the Hall sensor is closest, the initial position is set. In the case of a single-pole magnet, the largest magnetic force is sensed at the initial position. In the case of a bipolar (multipolar) magnet, The magnetic force of "0" is sensed at the initial position.

The amount of change in the magnetic force recognized by the hall sensor when the moving body having the magnet moves in the positive direction (P2) or the negative direction (P1) with reference to the initial position Pr is ΔG (| G2-G1 |) do. In this case, when the Hall sensor detects the monopole magnet as shown in FIG. 5 (a), the amount of change of the magnetic force sensed by the Hall sensor becomes? Ga, and as shown in FIG. 5 (b) ) When the hall sensor detects the magnet magnet, the change amount of the magnetic force sensed by the Hall sensor becomes? Gb.

When the Hall sensor senses a change in the magnetic force from the multipolar magnet, even if the magnet moves (| P1-P2 |) at the same distance as shown in the figure, ≪ Gb > can be detected.

In addition, when the Hall sensor senses a change in the magnetic force from the multipolar magnet, it is possible to simultaneously sense the positive magnetic force and the negative magnetic force based on the magnetic force " 0 ".

When the magnet to be sensed by the hall sensor is implemented as a two-pole (multi-pole) magnet magnet, the magnetic force section sensed by the hall sensor is further enlarged and the enlarged section can be used for magnetic force sensing, It is possible to effectively reflect the directionality (positive direction and negative direction) of the magnetic force to the position sensing, thereby realizing OIS drive more precisely.

The present invention shown in Fig. 6 corresponds to the embodiment in which the multipolar magnet is utilized more effectively and the magnetic field interference force that can be generated between the drive magnets can be minimized as described above.

As described above, the support frame 120 of the present invention is provided with the first drive magnet 200 for generating the driving force for the X-axis direction rotational movement, and the middle frame 130 is provided with the Y- A second drive magnet 210 is provided to generate a driving force.

One of the first driving magnet 200 and the second driving magnet 210 is formed of a single pole so as to reduce the influence of each of the driving magnets on each other and to make each axial movement more independent as described later , And the other one is preferably composed of two or more poles.

Referring to the coil for generating an electromagnetic force in the magnet, one of the first driving magnet 200 and the second driving magnet 210 has a single pole facing the coil corresponding to the first driving magnet 200 or the second driving magnet 210, It is preferable that the surface facing the coil corresponding to itself is formed of two or more poles.

 Specifically, in one embodiment, as shown in FIG. 6A, the first driving magnet 200 is configured such that the surfaces facing the first coils 150-1 and 150-3 are formed as a single pole, The second drive magnet 210 may be configured such that the surface facing the second coil 150-2 has two or more poles.

In this case, the first hall sensor 250-1 may be configured to detect the position of the first driving magnet 200 provided on the support frame 120, but as described above, Since the efficiency of position sensing is low, the first sub magnet 220 having two or more faces facing the first Hall sensor 250-1 on the support frame 120 as shown in FIG. 6 (a) And the first Hall sensor 250-1 may be configured to detect the position of the first sub magnet 220. The first Hall sensor 250-1 may be disposed at a position spaced apart from the first driving magnet 200. [

The second driving magnet 210 itself is implemented as a multi-pole (two poles), so that the second hall sensor 250-2 May sense the position of the second driving magnet 210 itself.

In this case, a sensing magnet (second sub magnet 250-2) having two or more poles is disposed at the end of the middle frame 130 in order to sufficiently utilize that the moving range of the end is larger than that of the second driving magnet 210 And the second hall sensor 250-2 may be configured to detect the position of the second sub magnet 250-2.

As shown in FIG. 6 (b), in contrast to the case described above according to the embodiment, the first driving magnet 200 has a surface facing one of the first coils 150-1 and 150-3 And the second driving magnet 210 may be configured to have a single pole facing the second coil 150-2.

In this case, the second hall sensor 250-2 may be configured to sense the position of the second driving magnet 210 provided in the middle frame 130. However, as described above, The efficiency of position sensing is low. Therefore, as shown in FIG. 6 (b), the second sub-magnet 130 having a surface facing the second hall sensor 250-2 having two or more poles 230 may be spaced apart from the second driving magnet 210 and the second hall sensor 250-2 may sense the position of the second sub magnet 230. [

The supporting frame 120 may additionally include a sensing magnet for position sensing only. However, since the first driving magnet 200 itself is implemented as a multipole (two poles), the first hall sensor 250-1 May sense the position of the first driving magnet 200 itself.

In this case, a sensing magnet (first sub-magnet 250-1) having two or more poles is disposed at the end of the support frame 120 in order to sufficiently utilize that the movement range of the end is larger than that of the first drive magnet 200 And the first hall sensor 250-1 may sense the position of the first sub magnet 250-1.

When the plurality of drive magnets are configured to have different polarity arrangements in this way, when the drive magnets have the same polarity arrangement, the influence of the magnetic field generated by each drive magnet on the other drive magnets can be reduced So that the control for the respective directions of movement or rotation movement by the respective drive magnets can be realized more independently and accurately.

Further, the plurality of driving magnets are configured to have different polarity arrangements, and at the same time, the moving body provided with the driving magnet of the unipolar magnetization type is additionally provided with a sensing magnet having two or more poles, It is possible to implement the OIS drive more precisely by detecting the accurate position of the hall sensor while implementing it independently and accurately.

FIG. 7 is a view showing the operation of the OIS in the X-axis direction according to the present invention, which is realized by the rotational movement of the support frame 120. FIG. Fig. 5 is a diagram showing the operating relationship of the axial OIS.

First, a description will be made of a process in which camera shake correction in the X-axis direction is implemented as the supporting frame 120 provided with the reflecting system 110 of the present invention, that is, the reflecting system 110, is rotated with reference to FIG.

As described above, when power of a proper size and direction is applied to the first coils 150-1 and 150-3, the first driving magnet 200 receives the electromagnetic force, and the first driving magnet 200 is installed The support frame 120 is moved. Since the support frame 120 is guided by the shape of the first groove guide 160-1 or the first guide rail 170-1, the movement of the support frame 120 is rotationally moved.

7, the reference numeral 110, the support frame 120, and the middle frame 130 at which the camera-shake correction is not performed are shown.

The light of the extraneous light is introduced into the Z1 path, and then the path of the extraneous light is changed by the reflection system 110 of the present invention as shown in the center of FIG. 7, and is introduced into the lens 210 in the optical axis direction (Z axis direction) .

The driving driver (not shown) of the present invention can detect the position of the reflecting system 110 (specifically, the position of the first driving magnet 200 mounted on the supporting frame 120 or the first driving magnet 200 mounted on the supporting frame 120) 1 sub-magnet 220), the first coil 150-1, 150-2, 150-3, 150-4, 150-2, 150-3, 150-4, 3).

When an electromagnetic force is generated between the first coils 150-1 and 150-3 and the first driving magnet 200 through the feedback control, the electromagnetic force generated as a driving force is transmitted to the support frame 120, that is, the support frame 120 The rotation of the reflection system 110 is corrected, and the movement due to the camera-shake is corrected.

7, when the electromagnetic force generated from the first coils 150-1 and 150-3 rotates the support frame 120 mounted with the reflection system 110 in the clockwise direction, (Left direction of the reference X-axis in Fig. 7) from the viewpoint of an image pickup element such as a lens or a CCD because a shift d1 is generated to the left by the rotational movement of the lens 110. [

7, when the electromagnetic force generated in the first coils 150-1 and 150-3 rotates the reflection system 110 in the counterclockwise direction, the incident light is shifted to the right ( d2), the correction movement in the X-axis direction (the rightward direction of the reference X-axis in Fig. 7) is performed from the viewpoint of the imaging element such as a lens or a CCD.

As described above, the present invention realizes camera shake correction in a specific direction by rotationally moving the reflection system 110, and moreover, the rotation movement of the reflection system 110 is divided into a first groove bobbin 160-1 having a curvature, And is guided while being physically supported by the guide rails 170-1 and the first ball 240-1. Therefore, the driving control can be more precisely performed, and the driving can be performed with a minimized power supply.

8 shows a state in which the support frame 120 received in the middle frame 130 rotates and moves while the middle frame 130 is rotated with respect to the base frame 140 and the reflector 110 mounted on the support frame 120, Axis direction camera-shake correction.

The middle diagram in Fig. 8 shows a reference state in which the camera-shake correction in the Y-axis direction is not performed.

8, when the electromagnetic force generated in the second coil 150-2 rotates the middle frame 130 in the clockwise direction, the reflectometer 110 rotates in the same direction, (Reference left direction in FIG. 8) is performed from the viewpoint of an imaging element such as a lens or a CCD, since a deviation d1 occurs to the left.

8, when the electromagnetic force generated in the second coil 150-2 rotates the middle frame 130 in the counterclockwise direction, the introduced light generates a deviation d2 to the right The correction movement in the Y-axis direction (the reference right direction in FIG. 8) is performed from the viewpoint of the imaging element such as a lens or a CCD.

Although the embodiment of the present invention has been described above with reference to the case where the support frame 120 rotates in the X axis direction and the middle frame 130 rotates in the Y axis direction, Needless to say, the support frame 120 may be rotated in the Y-axis direction and the middle frame 130 may be rotated in the X-axis direction.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

In the above description of the present invention, a modifier such as first, second, sub, etc. is merely a term of a tool concept used for relatively separating constituent elements of each other. Therefore, It is to be interpreted that it is not a term used for.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It should be understood that various modifications may be made in the ordinary skill in the art.

100: Reflector driving device
110: Reflectometer 120: Support frame
130: middle frame 140: base frame
150-1, 150-3: first coil 150-2: second coil
160-1: First groove groove 160-2: Second groove groove
170-1: first guide rail 170-2: second guide rail
180: first yoke 190: second yoke
200: first drive magnet 210: second drive magnet
220: first sub-magnet 230: second sub-magnet
240-1: first ball 240-2: second ball
250-1: first hall sensor 250-2: second hall sensor

Claims (12)

A support frame formed with a first groove bore and provided with a first drive magnet;
A reflection system installed in the support frame and reflecting light to a lens;
A middle frame having a first guide rail and a second groove bobbin corresponding to the first groove bobbin and having a second drive magnet;
A base frame having a second guide rail corresponding to the second groove guide;
A first coil generating an electromagnetic force in the first driving magnet to move the supporting frame in a first direction perpendicular to the optical axis with respect to the middle frame; And
And a second coil for generating an electromagnetic force in the second driving magnet to move the middle frame in a second direction perpendicular to the first direction with respect to the base frame. . The method according to claim 1,
Wherein one of the first and second driving magnets is composed of a single pole, and the other one of the first and second driving magnets comprises two or more poles. 3. The method of claim 2,
A sub magnet disposed on the support frame so as to be spaced apart from the first drive magnet; And
Further comprising a Hall sensor positioned corresponding to the sub-magnet,
Wherein the first driving magnet has a single pole facing the first coil, and the sub magnet has two or more poles facing the hall sensor. 3. The method of claim 2,
A sub magnet disposed on the middle frame so as to be spaced apart from the second driving magnet; And
Further comprising a Hall sensor positioned corresponding to the sub-magnet,
Wherein the surface of the second driving magnet facing the second coil is a single pole, and the sub-magnet has two or more poles facing the hall sensor. The drive magnet according to claim 1,
Wherein the support frame is provided at left and right positions symmetrical with respect to the center of the support frame. The method according to claim 1,
A first ball disposed between the first groove guide and the first guide rail; And
And a second ball disposed between the second groove guide and the second guide rail. The apparatus of claim 1,
Further comprising a yoke in a direction facing the first drive magnet. [2] The apparatus of claim 1,
Further comprising a yoke in a direction facing the second drive magnet. The apparatus of claim 1,
Wherein the first guide rail is formed on the inner side and the second groove is formed on the outer side. 10. The apparatus according to claim 9, wherein the first guide rail and the second groove bobbin comprise:
Axis direction, and are formed in a direction perpendicular to each other. 2. The apparatus according to claim 1, wherein the first groove-
Round shape,
Wherein the support frame rotates along a path corresponding to the first groove guide or the first guide rail. The apparatus according to claim 1, wherein the second groove-
Round shape,
Wherein the middle frame rotates along a path corresponding to the second groove or the second guide rail.

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