KR102140582B1 - Apparatus for driving optical-reflector with multi-axial structure - Google Patents

Abstract

The multi-axis reflective system driving apparatus according to the present invention includes a support frame having a first grooved rail and a first driving magnet; A reflectometer installed on the support frame and reflecting light to the lens; A middle frame in which a first guide rail and a second groove rail corresponding to the first groove rail are formed, and a second driving magnet is provided; A base frame on which a second guide rail corresponding to the second groove rail is formed; A first coil generating electromagnetic force in the first driving magnet to move the support frame in a first direction perpendicular to the optical axis based on the middle frame; And a second coil generating electromagnetic force in the second driving magnet to move the middle frame in a second direction perpendicular to the first direction based on the base frame.

Description

Multi-axis reflective reflector driving device {APPARATUS FOR DRIVING OPTICAL-REFLECTOR WITH MULTI-AXIAL STRUCTURE}

The present invention relates to a reflectometer driving apparatus, and more particularly, to a multi-axis reflectometer driving apparatus for realizing image stabilization by driving a reflectometer that changes a path of light in a multi-axis direction.

In accordance with the development of hardware technology and changes in user environment, various and complex functions in addition to basic functions for communication are integrated in a portable terminal such as a smartphone (mobile terminal).

A typical example is a camera module that implements functions such as auto focus (AF) and image stabilization (OIS). Recently, voice recognition, fingerprint recognition, and iris recognition functions for authentication and security, etc. The back is also mounted on a portable terminal, and recently, it has been attempted to mount a zoom lens in which a plurality of lens groups are aggregated so that the focal length can be variably adjusted.

The zoom lens has a structure in which a plurality of lenses or groups of lenses are arranged in the direction of the optical axis, which is a direction in which light is introduced, unlike the general lens, so that the length is longer in the optical axis length direction than the general lens. The light of the object passing through the zoom lens is generated as image data through subsequent processing after flowing into an imaging device such as a charged-coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS) like other lenses.

When the zoom lens is installed in a direction in which the main lens of the portable terminal is installed (ie, perpendicular to the main substrate) like other general lenses, the mobile terminal has a space corresponding to the height of the zoom lens (length in the optical axis direction). Since it has to be, there is a problem that it is difficult to optimize the essential characteristics of device miniaturization and weight reduction that the mobile terminal aims at.

In order to solve this problem, there is a method of reducing the size of the optical system itself by adjusting the angle, size, spaced distance, focal length, etc. of the lens, but this method is a method of physically reducing the size of the zoom lens or the zoom lens barrel. In addition to the inherent limitations, there is a problem that the essential characteristics of the zoom lens may be deteriorated.

In addition, the conventionally applied image stabilization (OIS) method is a method of correcting and moving the lens or the lens module itself in two directions (X-axis, Y-axis direction) on a plane perpendicular to the optical axis direction (Z-axis). When is applied to the zoom lens as it is, it can be said that the space utilization is low due to the characteristics of the shape, structure, and function of the zoom lens, and it is difficult to secure the precision of driving while increasing the volume of the device.

In order to solve this problem, a method has been attempted to correct the shaking of the captured image based on a lens or an imaging device (CCD, CMOS, etc.) by axially coupling the reflectometer and rotating the reflectometer in a certain direction.

However, in the case of this method, the load of the reflector or the support body to which the reflectometer is coupled acts in a specific direction, and the force caused by this load acts in a different size according to the distance the reflectometer has rotated. Since the size of the driving power for moving and the movement of the reflecting system are not functionally proportional, the reflecting system does not move linearly in comparison with the size of the driving power, and thus has a problem that it is difficult to precisely control the image stabilization.

In addition, when the reflectometer does not move linearly, when sensing the movement of the reflector, that is, the magnet mounted on the reflector, using the Hall sensor, the change in the magnetic field generated by the magnet does not change linearly. Of course, the problem that the change amount is small and it is difficult to accurately sense the movement of the reflectometer should be considered.

In addition, when a magnet for driving each direction of the moving body is used in the same type, magnetic fields of each magnet or each driving coil influence each other, which may cause problems in precise driving in each direction.

The present invention has been devised to solve the above-mentioned problems in the above background, and the rotation of the ball and the reflector that dissimilarizes the magnet structure acting on each axial driving force and physically supports the reflector. It is an object of the present invention to provide a reflectometer driving device that enables the reflectometer to be precisely driven in all directions for hand shaking by applying a guided structure in a complex manner.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by embodiments of the present invention. In addition, the objects and advantages of the present invention can be realized by a combination of the configuration and the configuration shown in the claims.

The multi-axis reflector driving apparatus of the present invention for achieving the above object is a support frame having a first grooved rail and a first driving magnet; A reflectometer installed on the support frame and reflecting light to the lens; A middle frame in which a first guide rail and a second groove rail corresponding to the first groove rail are formed, and a second driving magnet is provided; A base frame on which a second guide rail corresponding to the second groove rail is formed; A first coil generating electromagnetic force in the first driving magnet to move the support frame in a first direction perpendicular to the optical axis based on the middle frame; And a second coil generating electromagnetic force in the second driving magnet to move the middle frame in a second direction perpendicular to the first direction based on the base frame.

In addition, one of the first or second driving magnets of the present invention may be configured to be made of a single pole, and the other may be formed of two or more poles.

Furthermore, the present invention is a sub-magnet positioned on the support frame spaced apart from the first driving magnet; And it may further include a Hall sensor positioned corresponding to the sub-magnet, in this case, the first driving magnet of the present invention is made of a single pole facing the first coil, the sub-magnet is the hole. It may be configured such that the surface facing the sensor is made of two or more poles.

According to an embodiment of the present invention, a sub-magnet positioned on the middle frame to be spaced apart from the second driving magnet; And a hall sensor positioned corresponding to the sub-magnet, in which case the second driving magnet of the present invention is formed of a single pole facing the second coil, and the sub-magnet is the hall sensor. It may be configured such that the surface facing the two or more poles.

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

Furthermore, the present invention is a first ball disposed between the first groove rail and the first guide rail; And it may further include a second ball disposed between the second groove rail and the second guide rail.

Further, 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.

Moreover, in the middle frame of the present invention, the first guide rail may be formed on the inner side, and the second groove part rail may be formed on the outer surface, and the first guide rail and the second groove part rail are perpendicular to each other. It is preferably formed in the direction.

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

According to an embodiment of the present invention, since driving in all directions for image stabilization is implemented in a reflectometer that injects light into the lens, a structure for image stabilization is coupled to a zoom lens or a zoom lens carrier having a relatively large size. It is not necessary to minimize the size of the device itself, as well as to further improve the space utilization of the device.

According to a preferred embodiment of the present invention, the rotational movement of the reflectometer changing the path of the light is physically supported and guided by the round shape guiding structure and the point contact structure by the ball, so that the reflectometer Not only can the physical rotational movement be implemented more flexibly, but also the movement of the reflectometer and the driving power for moving the reflectometer can be implemented in a proportional proportion to improve the driving precision of image stabilization, and the power for driving Can be minimized.

The present invention can independently implement the OIS in the X-axis and Y-axis directions by organically combining the structures that rotate and support the reflectometer, thereby providing an effect of correcting the camera shake by adaptively responding to the shake in any direction. can do.

In addition, according to another embodiment of the present invention, the polarization arrangement of the driving magnets is configured differently to minimize mutual magnetic forces generated between the driving magnets, thereby making the OIS driving in the X-axis and Y-axis directions more independent and It can be implemented accurately.

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

The following drawings attached to this specification are intended to illustrate preferred embodiments of the present invention, and serve to more effectively understand the technical spirit of the present invention together with the detailed description of the invention described below. It should not be interpreted as being limited to the matter.
1 is a view showing the overall appearance of the actuator to which the drive device of the present invention is applied,
Figure 2 is an exploded coupling diagram showing a detailed configuration of the driving apparatus according to an embodiment of the present invention,
3 is a view showing a coupling relationship between the support frame and the middle frame shown in FIG. 2,
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 the principle of 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 driving magnet of the present invention,
7 is a view showing the operating relationship of the X-axis direction OIS of the present invention implemented by moving the reflector (support frame) relative to the middle frame,
8 is a view showing an operating relationship of the Y-axis direction OIS of the present invention implemented by moving the reflectometer (middle frame) relative to the base frame.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to ordinary or lexical meanings, and the inventor appropriately explains the concept of terms to explain his or her invention in the best way. Based on the principle that it can be defined, it should be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

Therefore, the embodiments shown in the embodiments and the drawings described in this specification are only the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention, and various equivalents can be substituted at the time of this application. It should be understood that there may be water and variations.

1 is a view showing the overall shape of an actuator 1000 to which a multi-axis reflectometer driving device 100 (hereinafter referred to as a “driving device”) according to the present invention is applied.

The actuator 1000 illustrated in FIG. 1 is connected to the driving device 100 of the present invention and the driving device 100 for realizing OIS by moving the reflectometer 110 in both axial directions perpendicular to the optical axis. A zoom lens 11 or the like is mounted, and may include a lens driving module 12 that implements AF for the zoom lens 11 according to an embodiment.

The driving device 100 according to the present invention can be implemented as a single device, as well as a configuration of the actuator 1000 as shown in FIG. 1, coupled to the top of the lens driving module 12 and the like. Can be implemented.

The lens 11 may be a single lens, a zoom lens in which a plurality of lenses or a lens group or an optical member such as a prism or mirror may be included therein, and the vertical length when the lens 11 is formed of a zoom lens or a zoom lens barrel A shape extending in the direction (Z-axis direction) can be achieved.

In the present invention, the path of light is changed (refraction, reflection) through a reflectometer (110 of FIG. 2) provided in the driving apparatus 100 of the present invention without light of a subject or the like directly flowing into the lens 11. And the like) and then introduced into the lens 11.

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

In addition, although not shown in the drawing, an imaging device such as a CCD or CMOS that converts a light signal into an electrical signal may be provided below the lens 11 based on the optical axis direction, and block or transmit light signals in a specific band. Filters may also be provided.

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, that is, in the X-axis direction (first direction) and the Y-axis direction (second direction). Corresponds to the technology of implementing 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 configuration of the driving device 100 according to an embodiment of the present invention. 2, the driving apparatus 100 of the present invention includes a reflectometer 110, a support frame 120, a middle frame 130, a base frame 140, a first driving magnet 200, a first Including the guide rail 170-1, the first yoke 180, the circuit board 10, the first coils 150-1, 150-3, the second coil 150-2, and the case 15 Can be configured.

First, with reference to FIG. 2, the overall configuration and coupling relationship of the driving device 100 of the present invention will be described, and the detailed configuration of the driving device 100 of the present invention and the OIS driving relationship in each direction will be described later.

As illustrated in FIG. 2, the light of the alien subject flows into the driving apparatus 100 of the present invention through the opening formed in the case 15 through the Z1 path, and the light introduced therein is the reflectometer of the present invention. The path is changed by (110) (refraction or reflection, etc.) (Z path) and flows into the lens 11 side.

The reflector 110 for changing the path of light may be a mirror or a prism, or a combination thereof, and may be implemented as various members capable of changing the light coming from the outside in the optical axis direction. have. The mirror or prism is preferably made of a glass material to improve optical performance.

As shown in FIG. 2, the driving device 100 of the present invention can be configured to refract a path of light by the reflectometer 110 so that light enters the lens 11 side, and thus carries the lens 11 itself Since it can be installed in the longitudinal direction rather than in the thickness direction of the terminal, it can be optimized for miniaturization or slimness of the portable terminal without increasing the thickness of the portable terminal.

The reflectometer 110 of the present invention is installed in the direction of the opening direction of the case 15 through which the light flows from the driving device 100, that is, in the direction toward the Y-axis front, based on the example shown in FIG. 2.

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

The reflectometer 110 is installed in a support frame 120 that physically supports the reflectometer 110, as shown in FIG. 2 and the like. The support frame 120 of the present invention is a first driving magnet 200 is mounted, the first groove rail 160-1 for guiding rotational movement in the X-axis direction is formed. The configuration of these will be described in detail later.

In this way, the support frame 120 of the present invention that physically supports the reflectometer 110 is installed to be physically supported by the middle frame 130 as shown in FIG. 2 in a state where the reflectometer 110 is installed. .

The support frame 120 of the present invention is installed to be able to move or rotate in the X-axis direction, which is one of two directions perpendicular to the optical axis based on the middle frame 130, and the support frame 120 is As it moves or rotates, the reflectometer 110 installed on the support frame 120 also performs its physical movement.

On the other hand, the middle frame 130 of the present invention is a direction in which the support frame 120 rotates relative to the middle frame 130 among the two directions perpendicular to the optical axis based on the base frame 140 (X-axis direction) It is configured to move or rotate in the Y-axis direction, which is a direction forming a vertical axis.

In order to drive the rotational movement of the middle frame 130, a second driving magnet 210 (see FIG. 4) is provided in the middle frame 130 and a second coil generating electromagnetic force to the second driving magnet 210 ( 150-2) is disposed on the circuit board 10 that is coupled from the side of the base frame 140, as illustrated in FIG.

First coil (150-1, 150-3) of the present invention is a configuration that provides a driving force for moving the support frame 120 in the X-axis direction with respect to the middle frame 130, the driving force to the support frame 120 Various configurations are possible, but it is desirable to implement a coil using electromagnetic force as a driving force as illustrated in the drawings in consideration of power consumption, low noise, and space utilization.

As described above, when the first coils 150-1 and 150-3 serve as a driving source for moving the support frame 120 in the X-axis direction, the first coils 150-1 and 150- are provided in the support frame 120 of the present invention. 3) is provided with a first driving magnet 200 to receive the electromagnetic force generated.

In order to more effectively implement the X-axis direction movement of the support frame 120, as illustrated in the drawings, the first driving magnet 200 may be provided on both sides of the support frame 120, respectively, and the first coil ( 150-1, 150-3) In addition, it may be provided in plural to face each support frame 120, the first driving magnet 200 and the first coil (150-1, 150-3) according to the embodiment Silver may be provided only on one side.

The second coil 150-2 from a corresponding point of view also provides a driving force for moving the middle frame 130 in the Y-axis direction based on the base frame 140, in which case the middle frame 130 of the present invention ) Is provided with a second driving magnet 210 that receives 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 driving magnet 200 is installed on the support frame 120, and the first driving magnet 200 is provided to the support frame 120. The first coils 150-1 and 150-3 generating electromagnetic force may be disposed on the circuit board 10 coupled to the base frame 140 as shown in FIG. 2.

The first driving magnet 200 and the first coils 150-1 and 150-3 generate the reflectometer 110 for changing the light introduced from the outside to the lens side through the structure of the present invention shown in FIG. As the support frame 120 rotates in the X-axis direction by electromagnetic force, it rotates in the X-axis direction.

In addition, the reflectometer 110 of the present invention is the middle frame 130 as the middle frame 130 rotates in the Y-axis direction by the electromagnetic force generated by the second driving magnet 210 and the second coil 150-2 ( The support frame 120 mounted on 130 is rotated in the same direction, and accordingly rotated in the Y-axis direction.

Since the support frame 120 of the present invention has a structure capable of independent rotational movement based on the middle frame 130, the middle frame 130 rotates in the Y-axis direction based on the base frame 140. When electromagnetic force is generated in the coils 150-1 and 150-3, the support frame 120 of the present invention can independently move in the X-axis direction.

Hereinafter, an operation relationship of the support frame 120 of the present invention to move or rotate will be described in detail with reference to the middle frame 130 with reference to FIG. 3.

As described above, the support frame 120 of the present invention is configured to move or rotate in the X-axis direction based on the middle frame 130. To this end, the support frame 120 has a middle as shown in FIG. A first groove rail 160-1 is provided to guide the rotational movement of its own X-axis direction based on the frame 130.

Image stabilization is implemented by moving the light of the subject flowing into the image pickup device in a direction that compensates for the movement caused by the camera shake, so reflection of the object flowing in the optical axis (Z-axis) direction is moved relative to the imaging element. The movement of the support frame 120 to which the system 110, that is, the reflectometer 110 is coupled, is preferably configured to be a rotational movement.

To this end, the first groove rail 160-1 formed in the support frame 120 has a shape extending in the longitudinal direction of the X axis as a round shape as shown in the drawing, and has an optimal curvature according to rotation movement. It is preferred to have it.

The middle frame 130 of the present invention accommodating the support frame 120 and physically supporting the support frame 120 to rotate is as shown in the drawing, the first groove of the support frame 120 A first guide rail 170-1 having a shape corresponding to the first groove portion rail 160-1 and a shape extending in the longitudinal direction as a rounded shape is formed at a position corresponding to the work 160-1. do.

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

When the middle frame 130 is disposed on the top of the support frame 120 or implemented in a vertically bent frame structure according to an embodiment, the first groove rail 160-1 is the top of the support frame 120 It may be provided in.

The first groove rail 160-1 and the first guide rail 170-1 of the present invention are arranged in two rows in a parallel direction, respectively, so that the shaking or the clearance of the support frame 120 can be minimized. Preferably, one cross-section is V-shaped, and the other cross-section can be configured to be U-shaped.

3, a plurality of first balls 240-1 are disposed between the first groove rail 160-1 and the first guide rail 170-1. Through the arrangement of 240-1), the support frame 120 and the middle frame 130 of the present invention can maintain a state spaced apart at regular intervals and are viewed with minimal friction by point-contact by the ball. The support frame 120 of the present invention may rotate in the X-axis direction based on the middle frame 130.

According to an embodiment, the first ball 240-1 is the first groove part rail 160-1 as illustrated in FIG. 3 in order to reduce the separation distance between the support frame 120 and the middle frame 130 as appropriate. Alternatively, a portion of the first guide rail 170-1 may be accommodated.

The support frame 120 of the present invention is provided with a first driving magnet 200, the first driving magnet 200 with the first coil (150-1, 150-3) disposed on the circuit board 10 In the relationship, the electromagnetic force is received, and the support frame 120 of the present invention is rotated based on the middle frame 130 using the electromagnetic force as a driving force.

The circuit board 10 uses a hall effect to determine the position of the first driving magnet 200 (reflectometer 110 mounted on the support frame 120 provided with the first driving magnet 200). A hall sensor 250-1 (see FIG. 2) for sensing may be provided. When the hall sensor 250-1 detects the position of the first driving magnet 200, the driving driver (not shown) is the first. The feedback control is performed such that power of an appropriate size 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 detects the position of the second driving magnet 210 as described below is also the same.

Through this method, the correct position of the reflectometer 110 and the power supply according to each other are controlled by mutual feedback, so that the camera shake correction function in the first direction (X-axis direction) can be accurately implemented. The driving driver (not shown) may be implemented in a form independent of the Hall sensors 250-1 and 250-2, but may also be implemented in the form of a single chip or module together with the Hall sensors 250-1 and 250-2. have.

Hereinafter, for convenience of explanation and understanding, the hall sensor is described as being 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 detecting the position of the first driving magnet 200 or the sub-magnet 220 for position sensing, which may be provided on the support frame 120 as described below, is used as the first hall sensor 250-1. It refers to the second driving magnet 210 or the hall sensor for detecting the position of the sub-magnet 230 for position sensing, which may be provided in the middle frame 130 as described below, the second hall sensor (250-2) It is referred to as.

On the other hand, the middle frame 130 of the present invention may be provided with a first yoke 180 made of a metal material having magnetism in a position facing the first driving magnet 200. The first yoke 180 generates a first driving magnet 200 and a manpower provided in the support frame 120 and pulls the support frame 120 toward the middle frame 130. 120) is in continuous point-contact with the first ball 240-1, and the support frame 120 can be effectively prevented from being detached.

The horizontal frame in the horizontal direction of the support frame 120 (refer to FIG. 3) is maintained and the image stabilization driving force by the first coils 150-1 and 150-3 and the first driving magnet 200 is more accurately implemented. 3, the first driving magnet 200 is provided at each of the left and right sides of the support frame 120, but is provided at positions symmetrical to each other based on the center portion of the support frame 120. desirable.

In addition, when the X-axis direction image stabilization driving ends, the first yoke described above can be more quickly and accurately supported so that the support frame 120, that is, the reflectometer 110 can return to the original position based on the middle frame 130. Preferably, 180 is disposed to face each of the first driving magnets 200 of the left and right sides, respectively.

4 is a diagram illustrating a middle frame 130, a base frame 140, and related configurations according to an embodiment of the present invention. Hereinafter, the middle frame 130 of the present invention will be described with reference to FIG. 140) will be described in detail the structure of the present invention to rotate and move in the Y-axis direction.

The middle frame 130 of the present invention is an object that physically supports the rotational movement in the X-axis direction of the support frame 120 as described above, and at the same time, when the base frame 140 is referenced, it rotates directly in the Y-axis direction. It also functions as a moving rotating body.

4, the middle frame 130 of the present invention is provided with a second driving magnet 210 receiving electromagnetic force generated from the second coil 150-2, and the Y of the middle frame 130 itself A second groove rail 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 accommodates the middle frame 130 and physically supports the middle frame 130 to rotate and move 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 rail 160-2.

The second coil 150-2 of the present invention is designed to move the middle frame 130 in the second direction (Y-axis direction) perpendicular to the first direction (X-axis direction) relative to the base frame 140. The electromagnetic force is generated in the two driving magnets 210, and the middle frame 130 of the present invention moves or rotates in the second direction (Y-axis direction) based on the base frame 140.

As described above, the second groove rails 160-2 provided in the middle frame 130 and the second guide rails 170-2 provided in the base frame 140 correspond to each other, that is, the Z axis. It has a shape extending in the longitudinal direction and is configured to have a rounded shape or an optimized and mutually correlated curvature so that the rotational movement of the middle frame 130 is effectively supported.

Due to the structure of the second groove part rail 160-2 and the second guide rail 170-2, the middle frame 130 of the present invention is the second groove part rail 160-2 or the second guide. It rotates along the path corresponding to the rail 170-2.

Multiple between the second groove rail 160-2 and the second guide rail 170-2 so that the middle frame 130 of the present invention can be more flexibly and precisely implemented by rotating in the Y-axis direction. Two second balls 240-2 are disposed.

By the second ball 240-2, the middle frame 130 of the present invention moves at a minimum frictional force and can maintain an appropriate separation distance from the base frame 140.

Like the first yoke 180 described above, the middle frame 130 so that the middle frame 130 does not deviate from the base frame 140 and the point contact with the second ball 240-2 can be effectively maintained. It is preferable that the second yoke 190 for pulling the second driving magnet 210 in the direction of the base frame 140 is provided.

The second driving magnet as shown in FIG. 4 and the like so that the middle frame 130 independently rotates relative to the base frame 140 while simultaneously supporting the rotational movement of the support frame 120 210 is preferably provided on a surface different from the surface provided with the first guide rail 170-1 in the middle frame 130.

From a corresponding point of view, the second groove rail 160-2 guiding the middle frame 130 to rotate and move relative to the base frame 140 is also provided with the first guide rail 170-1. It is preferably provided on a surface different from the surface. That is, as illustrated in the accompanying drawings, the first guide rail 170-1 is to be formed inside the middle frame 130, and the second groove rail 160-2 is the first guide rail 170 It is preferable to be formed on the outer surface, which is an area where -1) is not provided.

In addition, the first groove part rail 160-1 and the middle provided in the support frame 120 so that the X-axis movement of the support frame 120 and the Y-axis movement of the middle frame 130 can be independently implemented. The second groove part rails 160-2 provided in the frame 130 are preferably formed in directions perpendicular to each other.

Meanwhile, a second hole sensor 250-2 for 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 or the position of the reflectometer 110. .

The second hole sensor 250-2 is provided in the middle frame 130, that is, the middle frame 130 according to an embodiment because the change in height (position) of the end portion is relatively large rather than the center portion of the moving body that rotates and moves. In order to more effectively detect the position of the reflected reflector 110, it is preferable to configure to detect the position of the end of the middle frame 130.

To this end, the end of the middle frame 130, that is, the second driving magnet 210 is provided with a sub-magnet 230 at a position spaced apart, the second Hall sensor 250-2 is the sub-magnet 230 It is desirable to configure to detect the position of.

Hereinafter, for convenience of explanation and understanding, a description will be made of sub-magnets being 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 the first sub-magnet 220, and the sub-magnet provided in the middle frame 130 is referred to as the second sub-magnet 230.

As described above, the reflectometer 110 of the present invention reflects the incident light in the optical axis (Z-axis) direction, and the base frame 140 of the present invention is a two-axis reflector 110 perpendicular to the optical axis The reflectometer 110 is supported to be movable in the directions (X-axis and Y-axis).

As described above, the support frame 120 of the present invention supports the reflectometer 110 and is movably mounted on the base frame 140 in the uniaxial direction, and the middle frame 130 of the present invention is the base It is located between the frame 140 and the support frame 120 to support the reflectometer 110 to be movable in a direction perpendicular to the movement direction of the support frame 120.

In the present invention, the support frame 120 and the middle frame 130 are perpendicular to each other through a structure in which the middle frame 130 is disposed between the support frame 120 and the base frame 140 to which the reflectometer 110 is coupled. It is possible to move independently in each direction, and through this, the reflectometer 110 is configured to rotate in the X-axis and Y-axis directions perpendicular to the optical axis, thereby realizing image stabilization.

Hereinafter, a driving magnet according to various embodiments of the present invention (first driving magnet 200, second driving magnet 210), a sensing magnet (first sub magnet 220, second sub) according to various embodiments of the present invention will be described with reference to FIG. 6. The configuration of the magnet 230) and the hall sensor (first hall sensor 250-1, second hall sensor 250-2) will be described in detail. Prior to this, referring to FIG. 5, the principle of the Hall sensor detecting the position of the magnet will be briefly described according to the polarity of the magnet.

5(a) is a graph showing a magnetic force range sensed by a Hall sensor when a Hall sensor senses a magnet using a single-pole magnet, and FIG. 5(b) shows a positive magnetization with a magnet sensed by the Hall sensor. When using a magnet, it is a graph showing the magnetic force range detected by the Hall sensor.

In the following description, a case in which the magnetic pole of the magnet exposed to the hall sensor, that is, the magnetic pole surface of the magnet facing the hall sensor is made of one pole (one of N-pole or S-pole) is referred to as a single-pole magnetized magnet. The case where the magnetic pole face of the exposed magnet, that is, the magnetic pole face of the magnet facing the hall sensor is made of a plurality of poles, is referred to as a multipole magnet.

That is, the multi-pole magnetization magnet means a magnet that is disposed so that both the N-pole and the S-pole face the hall sensor, and the magnet is disposed such that both two or more N-pole and two or more S-poles face the hall sensor according to the embodiment. It includes.

When the coil for generating electromagnetic force on the magnet is used as a reference, as described later, a magnet formed by a single pole having a surface facing the coil corresponds to the single-pole magnetized magnet described above, and a surface facing the coil is formed by a plurality of poles. The magnet made corresponds to the above-described multi-pole magnetization magnet.

5(a) and 5(b), Pr means the distance between the Hall sensor and the magnet at the initial position (default) where there is no magnet movement. 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 magnetized magnet, the largest magnetic force is sensed at the initial position, and in the case of a two-pole (multipole) magnetized magnet, the magnetic force is generated. The magnetic force of “0” is sensed at the initial position.

When the moving body equipped with the magnet moves in the positive direction (P2) or the negative direction (P1) based on the initial position (Pr), the amount of change in the magnetic force recognized by the Hall sensor is △G(|G2-G1|). do. In this case, as shown in FIG. 5(a), when the Hall sensor detects a single-pole magnet magnet, the amount of change in the magnetic force sensed by the Hall sensor is ΔGa, and as shown in FIG. ) When the Hall sensor detects the magnetization magnet, the amount of change in the magnetic force sensed by the Hall sensor is △Gb.

In this way, when the Hall sensor detects a change in magnetic force from a multi-pole magnetized magnet, even if the magnet moves at the same distance as shown in the figure (|P1-P2|), the amount of change of the magnetic force much larger than in the case of a single pole (Ga <Gb) can be detected.

In addition, when the Hall sensor detects a change in magnetic force from a multi-pole magnetized magnet, it is also possible to simultaneously sense positive magnetic force and negative magnetic force based on the magnetic force “0”.

When the magnet sensed by the hall sensor is implemented as a two-pole (multi-pole) magnetized magnet, the magnetic force section sensed by the hall sensor is further expanded, and the enlarged section can be used for magnetic force sensing, thereby increasing the resolution of the hall sensor. The directionality of the magnetic force (positive direction and negative direction) can be effectively reflected in the position detection, making OIS driving more precise.

The present invention illustrated in FIG. 6 corresponds to an embodiment in which a multi-pole magnetization magnet is more effectively utilized as described above and a magnetic field interference force that can be generated between the driving magnets is minimized.

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

As will be described later, one of the first driving magnet 200 or the second driving magnet 210 is made of a single pole in order to reduce the influence of each driving magnet on each other so that movement in each axial direction is made more independently. , The other is preferably made of two or more poles.

When referring to the coil that generates electromagnetic force in the magnet as a reference, one of the first driving magnet 200 or the second driving magnet 210 faces the coil corresponding to itself is made of a single pole, and the other one It is preferable that the surface facing the coil corresponding to itself is made of two or more poles.

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

In this case, the first hole sensor 250-1 may be configured to sense the position of the first driving magnet 200 provided in the support frame 120, but as described above, the unipolar magnetizer (single pole) In the case, since the efficiency of the position detection is low, as shown in FIG. 6(a), the first sub-magnet 220 having two or more poles facing the first hall sensor 250-1 on the support frame 120 It is preferable that the first driving magnet 200 is spaced apart and the first hall sensor 250-1 is configured to sense the position of the first sub magnet 220.

From a corresponding point of view, the middle frame 130 may additionally be provided with a sensing magnet for position sensing only, but since the second driving magnet 210 itself is implemented as a multi-pole (2-pole), the second hall sensor 250-2 ) Can be configured to detect the position of the second driving magnet 210 itself.

However, even in this case, a sensing magnet (second sub-magnet 250-2) composed of two or more poles to fully utilize that the movement range of the end is larger is greater than that of the second driving magnet 210 at the end of the middle frame 130. ) And the second hole sensor 250-2 may be configured to detect the position of the second sub magnet 250-2.

Contrary to the case described above according to the embodiment, as shown in FIG. 6(b), the first driving magnet 200 has a surface facing the first coil (one or more of 150-1 and 150-3). It may be configured to be made of two or more poles, and the second driving magnet 210 may be configured such that the surface facing the second coil 150-2 is made of a single pole.

In this case, the second hole sensor 250-2 may be configured to sense the position of the second driving magnet 210 provided in the middle frame 130, but as described above, the unipolar magnetizer (single pole) In the case, since the efficiency of the position detection is low, as shown in FIG. 6(b), the second sub-magnet consisting of two or more poles facing the second hole sensor 250-2 at the end of the middle frame 130 ( It is preferable that the second driving magnet 210 is provided at a distance from the second driving magnet 210 and the second hall sensor 250-2 is configured to sense the position of the second sub magnet 230.

From a corresponding point of view, the supporting frame 120 may additionally be provided with a sensing magnet for position sensing only, but since the first driving magnet 200 itself is implemented as a multi-pole (2-pole), the first hall sensor 250-1 ) Can be configured to detect the position of the first driving magnet 200 itself.

However, even in this case, a sensing magnet (first sub-magnet 250-1) made of two or more poles is used at the end of the support frame 120 to fully utilize that the end-of-movement range is larger. ), and the first hall sensor 250-1 may be configured to detect the position of the first sub magnet 250-1.

When a plurality of driving magnets are configured to have different polarity arrangements, as compared with the case where the driving magnets have the same polarity arrangement, the influence of the magnetic field generated by each of the driving magnets on the other driving magnets can be reduced. Therefore, it is possible to more accurately and independently implement control for each direction of movement or rotational movement by each driving magnet.

Further, by configuring a plurality of driving magnets to have different polarity arrangements and simultaneously providing a sensing magnet composed of two or more poles in a moving body provided with a single-pole magnetized driving magnet, control of movement or rotational movement is further provided. It is possible to implement OIS more precisely through independent and accurate realization and accurate position detection of the hall sensor.

7 is a view showing the operating relationship of the X-axis direction OIS of the present invention implemented by the rotational movement of the support frame 120, Figure 8 is Y of the present invention implemented by the rotational movement of the middle frame 130 It is a diagram showing the operating relationship of the axial OIS.

First, referring to FIG. 7, a process in which image stabilization in the X-axis direction is implemented as the reflector 110 of the present invention, that is, the support frame 120 on which the reflector 110 is installed rotates, is rotated.

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

In the middle view of FIG. 7, the reflector 110, the support frame 120, and the middle frame 130 at a reference position where image stabilization is not performed are illustrated.

After the extraneous light enters the Z1 path, the path is changed by the reflectometer 110 of the present invention as shown in the center figure of FIG. 7 and flows into the lens 210 in the optical axis direction (Z-axis direction). .

When the external X-axis shaking due to hand shaking is transmitted, the driving driver (not shown) of the present invention is the position of the reflectometer 110 (specifically, the first driving magnet 200 mounted on the support frame 120) or The power of the appropriate size and direction to correct the X-axis direction position through the feedback control by the first Hall sensor 250-1 sensing the 1 sub-magnet 220 is the first coil 150-1, 150- It is controlled to be applied to 3).

When the electromagnetic force is generated between the first coils 150-1 and 150-3 and the first driving magnet 200 through the feedback control, the supporting frame 120, that is, the supporting frame 120 is used as the driving force. ), the reflector 110 mounted in the rotational movement is corrected by the movement of the hand.

When the electromagnetic force generated by the first coils 150-1 and 150-3 rotates the support frame 120 equipped with the reflector 110 clockwise as shown in the left figure of FIG. 7, the incoming light reflects Since the shift (d1) is generated to the left by the rotational movement of (110), correction in the X-axis direction (left direction of the X-axis based on FIG. 7) is performed from the viewpoint of an imaging device such as a lens or CCD.

From a corresponding point of view, when the electromagnetic force generated by the first coils 150-1 and 150-3 rotates the reflectometer 110 counterclockwise as shown in the right figure of FIG. 7, the incoming light is shifted to the right ( Since d2) is generated, a correction movement in the X-axis direction (the right direction of the X-axis in Fig. 7) is made from the viewpoint of an imaging device such as a lens or CCD.

As described above, the present invention implements the image stabilization in a specific direction by rotating the reflectometer 110, and further, the first groove rail 160-1 and the first groove rail 160-1 having a curvature of the rotation movement of the reflectometer 110. It is configured to be guided while being physically supported by the guide rail 170-1 and the first ball 240-1, so that driving control can be more precisely performed, and driving with a minimized power is also possible.

8 shows that the support frame 120 accommodated in the middle frame 130 is rotated by the rotation of the middle frame 130 based on the base frame 140, and the reflectometer 110 mounted on the support frame 120 is rotated. Shows the operating relationship in which the Y-axis image stabilization is achieved by the rotational movement.

The middle view of FIG. 8 shows a reference state in which the image stabilization in the Y-axis direction is not performed.

When the electromagnetic force generated by the second coil 150-2 rotates the middle frame 130 clockwise as shown in the left figure of FIG. 8, the reflector 110 also rotates and moves in the same direction. Since the shift d1 is generated to the left, a correction in the Y-axis direction (left direction as shown in FIG. 8) is performed from the viewpoint of an imaging device such as a lens or CCD.

From the corresponding point of view, when the electromagnetic force generated in the second coil 150-2 rotates the middle frame 130 counterclockwise as shown in the right figure of FIG. 8, the introduced light generates a shift (d2) to the right. From the viewpoint of an imaging element such as a lens or CCD, a correction movement in the Y-axis direction (the right direction in Fig. 8) is made.

In the above, the embodiment of the present invention has been described based on an example in which the support frame 120 rotates in the X-axis direction and the middle frame 130 rotates in the Y-axis direction, but moves in a direction perpendicular to each other according to the embodiment. If so, 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.

Although the present invention has been described above by way of limited examples and drawings, the present invention is not limited by this and will be described below and the technical idea of the present invention by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the equal scope of the claims.

In the above description of the present invention, since the modifiers such as first, second, and sub are only terms of a tool concept used to relatively distinguish components between each other, they indicate a specific order, priority, and the like. It should be interpreted that it is not a term used for this purpose.

The accompanying drawings and the like may be shown in a somewhat exaggerated form for emphasizing or emphasizing the technical contents of the present invention, for the illustration of the description of the present invention and examples thereof. In view of this, it should be interpreted that it is obvious that various types of modification examples may be possible at the level of those skilled in the art.

100: reflectometer driving device
110: reflectometer 120: support frame
130: middle frame 140: base frame
150-1, 150-3: 1st coil 150-2: 2nd coil
160-1: First groove rail 160-2: Second groove rail
170-1: 1st guide rail 170-2: 2nd guide rail
180: first yoke 190: second yoke
200: first driving magnet 210: second driving 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 having a first groove rail and a first driving magnet;
A reflectometer installed on the support frame and reflecting light to the lens;
A middle frame in which a first guide rail and a second groove rail corresponding to the first groove rail are formed, and a second driving magnet is provided;
A base frame on which a second guide rail corresponding to the second groove rail is formed;
A first coil generating electromagnetic force in the first driving magnet to move the support frame in a first direction perpendicular to the optical axis based on the middle frame; And
And a second coil for generating electromagnetic force in the second driving magnet to move the middle frame in a second direction perpendicular to the first direction based on the base frame. . According to claim 1,
One of the first or second driving magnet is made of a single pole, the other one is a multi-axis reflectometer drive device, characterized in that made of two or more poles. According to claim 2,
A sub-magnet positioned spaced apart from the first driving magnet on the support frame; And
Further comprising a Hall sensor positioned corresponding to the sub-magnet,
The first driving magnet is a multi-axis reflectometer drive device, characterized in that the surface facing the first coil is made of a single pole, and the sub-magnet is made of two or more poles facing the hall sensor. According to claim 2,
A sub magnet positioned on the middle frame to be spaced apart from the second driving magnet; And
Further comprising a Hall sensor positioned corresponding to the sub-magnet,
The second driving magnet is a multi-axis reflectometer drive device, characterized in that the surface facing the second coil is made of a single pole, and the sub-magnet is made of two or more poles facing the hall sensor. The method of claim 1, wherein the first driving magnet,
A multi-axis reflectometer drive device, characterized in that it is provided at left and right positions, respectively, which are symmetrical with respect to the center portion of the support frame. According to claim 1,
A first ball disposed between the first groove rail and the first guide rail; And
And a second ball disposed between the second groove rail and the second guide rail. The method of claim 1, wherein the middle frame,
And a yoke in a direction facing the first driving magnet. According to claim 1, The base frame,
And a yoke in a direction facing the second driving magnet. The method of claim 1, wherein the middle frame,
The first guide rail is formed on the inner side and the second groove part rail is formed on the outer surface of the multi-axis reflectometer drive device. 10. The method of claim 9, The first guide rail and the second groove rail,
Reflectometer driving apparatus of a multi-axis structure, characterized in that formed in a direction perpendicular to each other. According to claim 1, The first groove rail,
It has a rounded shape,
The support frame is a multi-axis reflectometer drive device characterized in that the rotational movement along a path corresponding to the first groove rail or the first guide rail. According to claim 1, The second groove rail,
It has a rounded shape,
The middle frame is a multi-axis reflectometer driving device, characterized in that it rotates along a path corresponding to the second groove part rail or the second guide rail.

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