KR102423689B1 - Apparatus for driving optical system with memory unit - Google Patents

Abstract

An optical system driving apparatus provided with a memory unit of the present invention includes a main frame provided with an optical system; a base frame for accommodating the main frame; a driving unit for moving the main frame in a first direction perpendicular to the optical axis with respect to the base frame; and a memory unit storing first reference position information, which is information on a position where the optical system is aligned in the first direction.

Description

Optical system driving device with memory unit {APPARATUS FOR DRIVING OPTICAL SYSTEM WITH MEMORY UNIT}

The present invention relates to an optical system driving device, and more particularly, to an optical system driving device in which the efficiency of OIS driving is improved by using information on a reference position of an optical system stored in a memory unit.

With the development of hardware technology and changes in the user environment, mobile terminals such as smartphones have various functions such as auto focus (AF) and optical image stabilization (OIS) in addition to basic functions for communication. and complex functions are integrated, and recently, a zoom lens in which a plurality of lens groups are aggregated is also attempted so that the focal length can be variously and variably adjusted.

In the case of a zoom lens, unlike a general lens, since a plurality of lenses or lens groups are arranged in an optical axis direction, which is a direction in which light is introduced, the zoom lens has a longer length in the optical axis longitudinal direction than a general lens. The light of the subject passing through the zoom lens flows into an imaging device such as a CCD (Charged-coupled Device) or CMOS (Complementary Metal-Oxide Semiconductor) like other lenses, and then is generated as image data through subsequent processing.

When the zoom lens is installed in the direction in which it stands upright from the main board of the mobile terminal like other general lenses, that is, in the thickness direction of the mobile terminal, a space equal to the height of the zoom lens (length in the optical axis direction) must be secured in the mobile terminal. Therefore, there is a problem in that it is difficult to optimize for the essential characteristics of device miniaturization and weight reduction that portable terminals are aiming for.

In order to solve this problem in the related art, as shown in FIG. 1 , a reflectometer driving device 500 equipped with a reflectometer 520 is installed in the thickness direction of the portable terminal, and the reflectometer 520 is moved (rotated) to A method of realizing handshake correction by reflecting light incident from the outside in the direction of a lens or an image pickup device (CCD, CMOS, etc.) installed in the longitudinal direction of the mobile terminal has been attempted.

In this method, the magnet 540 and the yoke 550 are provided in the movable body 510 in which the reflectometer 520 is installed and the yoke 550 is provided in the fixed body 530 in which the movable body 510 is accommodated. ), a method of flexibly moving the reflectometer 520 by utilizing the attractive force generated between them is also employed.

Position control of the reflectometer 520 is implemented in a way that moves (rotates) the reflectometer 520 in a direction to compensate for the movement (X-axis and Y-axis) generated by hand shake, so to increase the efficiency of position control, the reflection The default position of the system 520 is preferably set to a positive position in which the direction of light reflected from the reflectometer 520 and introduced into the lens corresponds to a direction perpendicular to the lens (optical axis).

However, the initial position of the reflectometer 520 may not be in the normal position as shown in FIG. 1 due to its own load or rotation or movement of the camera lens itself, and in particular, in the case of an embodiment using an attractive force by a yoke. Since the reflectometer is biased in a specific direction by the attractive force of the yoke, it may not be located in the normal position.

Of course, in order to solve this problem, it is possible to apply a method of measuring the actual initial position of the reflectometer that is not located in the correct position and reflecting the measured result to the hand-shake driving.

However, in the case of this method, a new process of inspecting or measuring the initial position of the reflectometer must be additionally performed, as well as all the numerous reflectometer driving devices, and the algorithm corresponding to each inclination is applied to each device. Since it has to be configured individually, there is a problem that the process efficiency is extremely reduced.

The present invention has been devised to solve the above-described problems in the background as described above, and by configuring a memory unit storing information on the initial position of the optical system to be additionally provided, the initial position of the optical system can be grasped more quickly and accurately, and through this An object of the present invention is to provide an optical system driving device capable of further simplifying and simplifying a process as well as implementing more precise image stabilization.

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

In order to achieve the above object, an optical system driving apparatus provided with a memory unit of the present invention includes a main frame having an optical system; a base frame for accommodating the main frame; a driving unit for moving the main frame in a first direction perpendicular to the optical axis with respect to the base frame; and a memory unit storing first reference position information that is information on a position where the optical system is aligned in the first direction.

In addition, the driving unit of the present invention includes a first driving magnet provided in the main frame; and a first coil mounted on the circuit board and configured to generate electromagnetic force in the first driving magnet to move the main frame in a first direction perpendicular to the optical axis with respect to the base frame.

In this case, the optical system driving apparatus provided with the memory unit of the present invention includes one or more first balls positioned between the base frame and the main frame; and a first yoke for generating attractive force to the first driving magnet.

According to an embodiment, the optical system of the present invention may be a reflectometer that reflects the light of the subject incident from the outside in the direction of the lens of the camera module.

In this case, the optical system driving apparatus provided with the memory unit of the present invention may further include a first Hall sensor for sensing the position of the reflector based on the first direction, and the first reference position information is When the direction of the light reflected from the reflectometer is parallel to the direction of the optical axis, it may be a sensing value output by the first Hall sensor.

In addition, the optical system driving device provided with the memory unit of the present invention is provided in the main frame spaced apart from the first driving magnet, and further includes a first sub-magnet having a surface facing the first hall sensor having two or more poles. may be included.

On the other hand, the main frame of the present invention is provided with the optical system, a support frame provided with a second driving magnet; and a middle frame provided with the first driving magnet, the optical system driving device provided with the memory unit of the present invention is mounted on the circuit board, and generates electromagnetic force in the second driving magnet to support the a second coil for moving a frame in a second direction perpendicular to the optical axis with respect to the middle frame; one or more second balls positioned between the support frame and the middle frame; and a second yoke for generating attractive force to the second driving magnet. In this case, the memory unit of the present invention is a second reference that is information about a position where the optical system is aligned in the second direction. Location information may be further stored.

According to an embodiment, the optical system of the present invention may be a reflector that reflects the light of the subject incident from the outside in the lens direction of the camera module. In this case, the optical system driving device provided with the memory unit of the present invention is It may be configured to further include a second Hall sensor for sensing the position of the reflector based on the direction, the second reference position information is when the direction of the light reflected from the reflector is parallel to the optical axis direction. It may be a sensing value output by the second Hall sensor.

In addition, the optical system driving device provided with the memory unit of the present invention is provided on the support frame spaced apart from the second driving magnet, and further includes a second sub-magnet having a surface facing the second hall sensor having two or more poles. may be included.

On the other hand, the memory unit of the present invention is preferably mounted on the circuit board in a form capable of interfacing with the outside.

An apparatus for setting reference information of an optical system driving apparatus according to the present invention comprises: a generator for outputting a test signal to the optical system driving apparatus; an optical system driving unit for moving the optical system provided inside the optical system driving device in a first direction or a second direction perpendicular to the optical axis; an input unit provided in the optical system driving device and receiving a sensed value from a Hall sensor sensing a position of the optical system based on the first direction or the second direction; a receiver for receiving an output signal output from the optical system; and a main controller configured to store the sensed value output by the Hall sensor in a memory unit provided inside the optical system driving device when the output signal received by the receiver corresponds to the reference alignment position.

According to an embodiment, the optical system provided inside the optical system driving device may be a reflector that reflects the light of a subject incident from the outside in the lens direction of the camera module. In this case, the generator and the receiver of the present invention are the optical system driving device It may be configured to be provided at a position perpendicular to each other based on the .

The optical system driving apparatus provided with the memory unit of the present invention can more quickly and accurately confirm the initial position of the optical system using information about the reference position of the optical system stored in the memory unit, and through this, the driving of the optical system can be more precisely implemented. .

In addition, according to the present invention, since the memory unit is mounted on the circuit board in a form capable of interfacing with the outside, information about the reference position stored in the memory unit can be conveniently used in the process of inspecting the performance of the optical system driving device, thereby further simplifying or simplifying the process itself. can be simplified.

Furthermore, according to another embodiment of the present invention, by configuring the polarity arrangement of the driving magnets to be different from each other to minimize the magnetic interference generated between the driving magnets, the OIS driving in the X-axis and Y-axis directions can be more independently and accurately Of course, OIS driving can be implemented more precisely by extending the magnetic force section detected by the sensor by using the positively magnetized magnet as a sensing magnet.

The reference information setting device of the optical system driving device according to the present invention is configured to easily measure the reference position of the optical system despite the complicated internal configuration of the optical system driving device, so that the reference position measurement processing can be implemented more efficiently.

The following drawings attached to the present specification 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 present invention to be described later, so that the present invention is described in these drawings It should not be construed as being limited only to the matters.
1 is a diagram schematically illustrating a bias phenomenon occurring in a conventional reflectometer driving device;
2 is an exploded view showing a detailed configuration of an optical system driving device according to a preferred embodiment of the present invention;
3 is a view showing a coupling relationship between the main frame and the base frame shown in FIG. 2;
4 is a view showing a coupling relationship between the support frame and the middle frame shown in FIG. 2;
5 is a view for explaining a process of setting reference position information in the Y-axis direction;
6 is a view for explaining a process of setting reference position information in the X-axis direction;
7 is a view showing various embodiments of the driving magnet and the sensing magnet of the present invention;
8 is a diagram schematically showing the configuration of a reference information setting apparatus according to a preferred embodiment of the present invention;
9 is a view showing a preferred embodiment of the present invention for adjusting the output signal received by the receiver to correspond to the reference alignment position by moving the optical system in the X-axis direction or the Y-axis direction.

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 conventional or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Therefore, the configuration shown in the embodiments and drawings described in the present specification is only the most preferred embodiment of the present invention and does not represent all the technical spirit of the present invention, so various equivalents that can replace them at the time of the present application It should be understood that there may be water and variations.

The optical system driving device (hereinafter referred to as 'driver') 100 of the present invention is configured to include a memory unit 260 in which information on the reference position of the optical system 110 is stored, thereby determining the reference position of the optical system 110 . It can be checked more quickly and accurately and corresponds to a device that can implement the driving of the optical system more precisely through this.

If it is a module or unit that moves or rotates according to the driving characteristics and whose driving is controlled by using position information that is the basis of movement or rotation, the lens provided in the camera device and the light of the subject incident from the outside are reflected by the lens of the camera module. Of course, it may correspond to the optical system 110 of the present invention without being limited to the name, including a reflective system such as a prism or mirror that reflects in the direction, a general lighting device, or a vehicle lighting device.

Hereinafter, the optical system 110 and the driving device 100 of the present invention will be described based on a reflector that reflects the light of a subject incident from the outside in the lens direction.

2 is an exploded view showing a detailed configuration of the driving device 100 according to a preferred embodiment of the present invention, and FIG. 3 is a coupling relationship between the main frame 125 and the base frame 140 shown in FIG. , and FIG. 5 is a view for explaining a process of setting reference position information in the Y-axis direction.

Hereinafter, with reference to FIGS. 2 and 3, a detailed configuration of the driving device 100 according to the present invention and an embodiment for implementing handshake correction in the Y-axis direction among two directions perpendicular to the optical axis will be described, referring to FIG. With reference to the reference position information in the Y-axis direction will be described in detail.

As shown in FIG. 2 , the driving device 100 of the present invention may include a main frame 125 , a base frame 140 , a driving unit 200 , and a memory unit 260 .

As shown in FIG. 2 , the light of the foreign subject flows into the driving device 100 of the present invention through the opening formed in the case 15 through the Z1 path, and the light introduced into the interior of the reflectometer of the present invention The path is changed (refraction or reflection, etc.) (Z path) by 110 and flows into the lens (not shown) located in the lower part (Z-axis reference) of the driving unit 200 of the present invention.

The reflectometer 110 for changing the path of light may be one selected from a mirror or a prism or a combination thereof, and may be implemented with various members that can change the light entering from the outside in the direction of the optical axis. can The mirror or prism is preferably implemented with a glass material in order to improve optical performance.

As described above, since the driving device 100 of the present invention is configured to refract the path of light by the reflectometer 110 to introduce light into the lens, the lens itself is not installed in the thickness direction of the portable terminal, but is installed in the longitudinal direction. Therefore, the thickness of the portable terminal is not increased, and thus the portable terminal can be optimized for miniaturization or slimming.

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

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

The reflectometer 110 is installed or provided on the main frame 125 that physically supports the reflectometer 110 as shown in FIG. 2 and the like, and the main frame 125 of the present invention has the reflectometer 110 installed therein. It is accommodated in the base frame 140 of the present invention in this state.

The main frame 125 of the present invention is accommodated in the base frame 140 of the present invention to enable movement or rotation in a clockwise or counterclockwise direction based on the YZ plane of FIG. 2 , and the main frame 125 moves As the rotational movement moves, the reflectometer 110 installed on the main frame 125 also performs its physical movement.

When the reflectometer 110 moves or rotates in the clockwise or counterclockwise direction based on the YZ plane, the light reflected from the reflectometer 110 is moved in the +Y direction or the -Y direction to the image pickup device or lens. will be hired

Therefore, hereinafter, in order to increase the convenience of understanding, the direction in which the main frame 125 moves or rotates is referred to as a direction in which the light of the subject moves with respect to the image pickup device or the lens. That is, a direction in which the main frame 125 moves in a clockwise or counterclockwise direction with respect to the YZ plane is referred to as a positive direction or a negative direction in the Y-axis direction (first direction).

The driving unit 200 of the present invention corresponds to a configuration that provides a driving force for moving the main frame 125 in the Y-axis direction (first direction) perpendicular to the optical axis with respect to the base frame 140 .

The configuration for providing the driving force to the main frame 125 can be applied in various ways, but in consideration of power consumption, low noise, space utilization, etc., the first coil 150-1 and the first coil 150-1 using electromagnetic force as a driving force as illustrated in the drawing It is preferably implemented with one driving magnet 210-1.

In order to drive the movement of the main frame 125, a first driving magnet 210-1 (refer to FIG. 3) is provided in the main frame 125, and the first driving magnet 210-1 generates electromagnetic force. The first coil 150 - 1 is disposed on the circuit board 10 coupled to the base frame 140 as illustrated in FIG. 2 .

As described above, when the first coil 150-1 and the first driving magnet 210-1 are used as a driving source for moving the main frame 125 in the Y-axis direction, power corresponding to the driving control signal is applied to the circuit board. When applied to the first coil 150-1 through (10), the first coil 150-1 generates an electromagnetic force in the first driving magnet 210-1, and by this electromagnetic force, the main frame 125 ) is moved in the Y-axis direction with respect to the base frame 140 .

According to the embodiment, as shown in FIG. 3 , one or more first balls 240 - 1 are disposed between the main frame 125 and the base frame 140 . Through the arrangement, the main frame 125 and the base frame 140 of the present invention can maintain a state spaced apart by a predetermined distance, and the main frame of the present invention can be maintained with a frictional force minimized by point-contact by the ball. The frame 125 can move in the Y-axis direction with respect to the base frame 140 .

As shown in FIG. 3 , the base frame 140 of the present invention may be provided with a first yoke 180 made of a magnetic metal material at a position facing the first driving magnet 210 - 1 . .

The first yoke 180 generates an attractive force with the first driving magnet 210 - 1 provided in the main frame 125 to pull the main frame 125 in the direction of the base frame 140 , so by this attractive force The main frame 125 is continuously in point-contact with the first ball 240 - 1 , and the main frame 125 is effectively prevented from being separated to the outside.

As described above, the main frame 125 of the present invention is configured to move or rotate in the Y-axis direction with respect to the base frame 140. For this purpose, the main frame 125 has the main frame 125 as shown in FIG. A first groove part rail 160-1 for guiding the movement of the frame 125 in the Y-axis direction may be formed.

Since hand-shake compensation is implemented by moving the light of the subject that flows into the image pickup device in a direction that compensates for the movement caused by hand shake, the light of the subject that flows in the optical axis (Z-axis) is moved relative to the image pickup device. The reflectometer 110, that is, the movement of the main frame 125 to which the reflectometer 110 is coupled is preferably configured to be a rotational movement.

For this, the first groove rail 160-1 formed on the main frame 125 is preferably configured to have an optimized curvature according to rotational movement in a rounded shape as shown in the drawing, and the main frame It is preferable to have a shape extending in the longitudinal direction of the Z-axis in order to guide the movement in the Y-axis direction of (125).

The base frame 140 of the present invention that physically supports the rotational movement of the main frame 125 is a first grooved rail at a position corresponding to the first grooved rail 160-1 as shown in FIG. 3 . The first guide rail 170-1 having a shape corresponding to 160-1, that is, a rounded shape and a shape extending in the longitudinal direction of the Z-axis may be formed.

The main frame 125 of the present invention rotates along a path corresponding to the first grooved rail 160-1 having a rounded shape or the first guide rail 170-1 having a corresponding shape as described above. will do

According to the embodiment, when the structure of the base frame 140 is disposed on the upper portion of the main frame 125 or implemented as a frame structure bent vertically, the first groove rail 160 - 1 is the upper portion of the main frame 125 . can be provided in

It is more preferable that the first groove rail 160-1 and the first guide rail 170-1 of the present invention are arranged in two rows in parallel to each other so that the shaking or gap of the main frame 125 can be minimized. desirable.

According to the embodiment, as illustrated in FIG. 3 in order to maintain the separation between the main frame 125 and the base frame 140 by an appropriate distance, the first ball 240 - 1 is the first grooved rail 160 -1) or it may be provided in a form in which a certain part is accommodated in the first guide rail 170-1.

On the other hand, as described above, the present invention stores information on the initial position of the reflectometer 110 in the memory unit 260 and uses this stored information to more quickly and accurately determine the initial position of the reflectometer 110 and Through this, it is configured to implement more precise image stabilization, as well as to further simplify and simplify the process.

To this end, in the memory unit 260 of the present invention, first reference position information, which is information on a position where the reflectometer 110 is aligned in the Y-axis direction (first direction), is stored in the memory unit 260, The first reference position information refers to information on the position or attitude of the reflector 110 that allows light to be reflected in a direction parallel to the direction of the optical axis.

According to an embodiment, the memory unit 260 of the present invention may be implemented in the form of a hardware chip such as a ROM (Read Only Memory) capable of reading written information, an EEPROM (Electrically Erasable Programmable Read Only Memory), etc. , it can also be implemented in an integrated form in the AF or OIS driving IC through SOC (System On Chip).

In addition, in order to allow easy access to the reference position information stored in the memory unit 260 in the process of inspecting the performance of the reflectometer driving device 100 or the reference position of the reflectometer 110, the memory of the present invention The unit 260 is preferably mounted on the circuit board 10 in a form capable of interfacing with the outside through the interfacing unit 11 formed on the circuit board 10 .

As described above, in the present invention, when the memory unit 260 is configured to be mounted on the circuit board 10 in a form capable of interfacing with the outside, the process of inspecting the performance of the driving device 100 mounted on the portable terminal or OIS driving Since the reference position information can be easily used in the system, not only can the process itself be simplified, but also the efficiency of OIS operation can be improved.

The memory unit 260 of the present invention may be provided in a direction facing the first driving magnet 210-1 as illustrated in FIGS. 2 and 3, as well as space utilization and arrangement relation with other components. It may be provided at various positions such as the side portion of the circuit board 10 in consideration of the like.

If it is possible to measure the position at which the reflectometer 110 is aligned in the first direction, the reference position information stored in the memory unit 260 of the present invention is measured using various position measuring means such as an optical sensor and a Hall sensor to be described later. Of course it could be.

According to the embodiment, the circuit board 10 has a first driving magnet 210-1 (reflectometer 110 provided in the main frame 125) with respect to the first direction using a hall effect. A first Hall sensor 250-1 (refer to FIG. 2) for detecting the position of may be provided.

When the first Hall sensor 250-1 detects the position of the first driving magnet 210-1, that is, the reflectometer 110, a driving driver (not shown) is appropriate for the position of the reflectometer 110. Feedback is controlled so that power of magnitude and direction is applied to the first coil 150-1.

Through this method, the handshake correction function in the first direction (Y-axis direction) can be precisely implemented by mutually feedback-controlling the correct position of the reflectometer 110 and the power application accordingly.

The first Hall sensor 250-1 may be implemented in a form independent of a driving driver (not shown) as shown in FIG. 2, but may be implemented in the form of a single chip or module together with a driving driver according to an embodiment. may be

Since the change in height (position) of the end portion is relatively greater than that of the center portion of the rotating moving body, the first Hall sensor 250 - 1 is installed in the main frame 125 , that is, the reflectometer 110 provided in the main frame 125 . ), the first hall sensor 250-1 of the present invention is preferably configured to detect the position of the end of the main frame 125 in order to more effectively detect the position.

To this end, the first sub-magnet 220 is provided at the end of the main frame 125, that is, at a position spaced apart from the first driving magnet 210-1, and the first hall sensor 250-1 is now 1 It may be configured to detect the position of the sub-magnet 220 .

In the case of an embodiment in which the position of the reflectometer 110 is sensed using the first Hall sensor 250-1 as described above, the first reference position information stored in the memory unit 260 of the present invention is the reflectometer 110 . The direction of the reflected light corresponds to the sensing value output by the first Hall sensor 250-1 at the position of the reflectometer 110 at which the direction is parallel to the optical axis direction.

A detailed description of the process of setting the first reference position information is shown in FIG. 5 . As shown in FIG. 5, the reflectometer 110 has an initial position rotationally moved in a clockwise direction based on the YZ plane (FIG. 5 (A)) or an initial position rotationally moved in a counterclockwise direction (FIG. 5 (C) )) can have.

When light is incident on the reflectometer 110 from the outside in such a state, the direction of the reflected light Zr and the optical axis direction are not parallel, so that the reflected light Zr is -Y at the center position P of the lens or image pickup device. It is incident at positions spaced apart by d1 in the direction (FIG. 5 (A)) or the +Y direction (FIG. 5 (C)).

As such, when the reflected light Zr is incident at a position deviating from the central position P, the reflected light Zr is reflected to the central position P by adjusting the position of the reflectometer 110 in the opposite direction to the initial position. The reference position of the system 110 is searched.

Specifically, when it is sensed that the reflected light Zr is incident at a position spaced apart by d1 in the -Y direction from the central position P (FIG. 5 (A)), the reflected light Zr is detected at the central position P (FIG. 5 (B)) move the reflectometer 110 counterclockwise.

When it is sensed that the reflected light Zr is incident at a position spaced apart by d1 in the +Y direction from the central position P (FIG. 5 (C)), until the reflected light Zr is detected at the central position P (FIG. 5 (B)) The reflectometer 110 is moved clockwise.

Through this process, when the direction of the reflected light Zr is parallel to the optical axis direction and the reflected light Zr is detected at the central position P, the reflectometer 110 position at this time is set as the reference position and output at the same time. The sensed value of the first Hall sensor 250 - 1 being used is stored in the memory unit 260 as first reference position information.

4 is a view illustrating a coupling relationship between the support frame 120 and the middle frame 130 shown in FIG. 2 , and FIG. 6 is a view for explaining a process of setting reference position information in the X-axis direction.

Hereinafter, hand shake correction in the X-axis direction among the two directions perpendicular to the optical axis will be described with reference to FIGS. 2 and 4, and the process of setting reference position information in the X-axis direction with reference to FIG. 6 will be described in detail. .

The driving device 100 of the present invention may be configured to implement not only hand shake correction in the Y-axis direction but also hand shake correction in the X-axis direction perpendicular thereto.

As described above, the hand shake correction in the Y-axis direction is implemented by moving the main frame 125 corresponding to a relatively moving body in the Y-axis direction with respect to the base frame 140 corresponding to the relative fixed body. In this case, the first groove rail 160 - 1 described above with reference to FIG. 2 and the like is formed in the middle frame 130 of the main frame 125 .

The driving device 100 of the present invention physically dualizes the mainframe 125, uses one of the dual components as a relative moving body, and uses the other as a relative fixed body to implement handshake correction in the X-axis direction. do.

Specifically, the main frame 125 of the present invention is configured to include a middle frame 130 functioning as a relative fixed body and a support frame 120 functioning as a relative moving body, and the driving device 100 of the present invention is a middle frame. By moving or rotationally moving the support frame 120 in the X-axis direction with reference to 130 , hand-shake correction in the X-axis direction is implemented.

The reflectometer 110 of the present invention is installed on the support frame 120 that physically supports the reflectometer 110 as shown in FIG. 2 and the like, and the first driving magnet 210-1 of the present invention described above is It is provided in the middle frame 130 .

The support frame 120 of the present invention is installed in the middle frame 130 of the present invention to enable movement or rotation in a clockwise or counterclockwise direction based on the XY plane of FIG. 2 , and the support frame 120 moves As the rotation moves, the reflectometer 110 installed on the support frame 120 also performs its physical movement.

When the reflectometer 110 moves or rotates in the clockwise or counterclockwise direction based on the XY plane, the light reflected from the reflectometer 110 is deflected in the +X direction or the -X direction to be directed to the image pickup device or lens. will be hired

Therefore, in the following, in order to increase the convenience of understanding, the direction in which the support frame 120 moves or rotates is referred to as a direction in which the light of the subject moves with respect to the imaging device or the lens. That is, a direction in which the support frame 120 moves in a clockwise or counterclockwise direction with respect to the XY plane is referred to as a positive or negative direction in the X-axis direction (second direction).

In order to drive the rotational movement of the support frame 120, a second driving magnet 210-2 is provided in the middle frame 130, and a second coil that generates electromagnetic force in the second driving magnet 210-2 ( 150-2) is mounted on the circuit board 10 coupled to the base frame 140 as illustrated in FIG. 2 and the like.

The second driving magnet 210 - 2 and the second coil 150 - 2 may be provided in a single number, but a horizontal balance of the support frame 120 (refer to FIG. 2 ) is induced, and the second coil As shown in FIG. 2 , the second driving magnet 210-2 has a support frame 120 so that the driving force of the hand shake correction by 150-2 and the second driving magnet 210-2 can be more precisely implemented. ) are provided on the left and right sides, respectively, and are preferably provided at positions symmetrical to each other with respect to the center portion of the support frame 120 .

To correspond to this, a plurality of second coils 150 - 2 may also be provided to face each support frame 120 .

Since the support frame 120 of the present invention has a structure capable of independent rotational movement based on the middle frame 130 , even if the middle frame 130 is rotationally moved in the Y-axis direction with respect to the base frame 140 , the second second When electromagnetic force is generated in the coil 150 - 2 , the support frame 120 of the present invention can independently rotate in the X-axis direction.

According to the embodiment, the second ball 240-2 may be positioned between the support frame 120 and the middle frame 130 so that the movement in the X-axis direction of the support frame 120 can be implemented more flexibly and precisely. have.

In addition, the support frame 120 is constantly in point-contact with the second ball 240 - 2 by the attractive force generated between the second driving magnet 210 - 2 and the support frame 120 . ), a magnetic second yoke 190 may be provided in the middle frame 130 in order to effectively prevent it from being separated to the outside.

As shown in Fig. 4, the support frame 120 of the present invention may be provided with a second groove rail 150-2 to guide the movement of the support frame 120 itself in the X-axis direction more stably. In addition, the middle frame 130 may be provided with a second guide rail 170 - 2 having a shape corresponding to the second groove portion rail 150 - 2 .

The second groove rail 150-2 and the second guide rail 170-2 have a shape corresponding to each other, that is, a shape extending in the X-axis longitudinal direction, and are rounded so that the rotational movement of the support frame 120 is effectively supported. It is preferable to be configured to have a true shape or an optimized and mutually corresponding curvature.

According to the structure of the second grooved rail 150-2 and the second guide rail 170-2, the support frame 120 of the present invention is the second grooved rail 150-2 or the second guide. It rotates along a path corresponding to the rail 170 - 2 .

In order for the middle frame 130 to support the rotational movement of the support frame 120 and to independently implement rotational movement based on the base frame 140 at the same time as shown in FIG. 4 , the second guide rail Reference numeral 170-2 is preferably provided on a surface different from the surface on which the first driving magnet 210-1 of the middle frame 130 is provided.

From a corresponding point of view, the first groove part rail 160-1 guiding the rotational movement of the middle frame 130 with respect to the base frame 140 is also provided with the second guide rail 170-2. It is preferable to be provided on a surface different from the surface.

That is, as illustrated in the accompanying drawings, the second guide rail 170 - 2 is formed on one side of the middle frame 130 , and the first grooved rail 160 - 1 is the second guide rail 170 . It is preferable to form on the other side, which is an area where -2) is not provided.

In addition, the second groove rail 150-2 and the middle provided in the support frame 120 so that the X-axis direction movement of the support frame 120 and the Y-axis direction movement of the middle frame 130 can be independently implemented. It is preferable that the first groove rails 160 - 1 provided in the frame 130 are formed in a direction perpendicular to each other.

In an embodiment in which the support frame 120 moves in the X-axis direction (second direction) with respect to the middle frame 130 , the reflectometer 110 is arranged in the second direction in the memory unit 260 of the present invention. The second reference position information, which is information about the , is stored.

Meanwhile, a second Hall sensor 250 - 2 sensing the position of the second driving magnet 210 - 2 in order to sense the X-axis direction position of the reflectometer 110 may be provided on the circuit board 10 . .

The second hall sensor 250-2 is the position of the second driving magnet 210-2, that is, the position of the support frame 120 provided with the second driving magnet 210-2, or the position of the reflectometer 110. detect the position

In the case of an embodiment in which the position of the reflectometer 110 is sensed using the second Hall sensor 250-2 as described above, the second reference position information stored in the memory unit 260 of the present invention is the reflectometer 110 . When the direction of the reflected light becomes parallel to the direction of the optical axis, it corresponds to the sensing value output by the second Hall sensor 250 - 2 .

A detailed description of the process of setting the second reference position information is shown in FIG. 6 . As shown in FIG. 6, the reflectometer 110 has an initial position rotationally moved in a clockwise direction based on the XZ plane (FIG. 6 (A)) or an initial position rotationally moved in a counterclockwise direction (FIG. 6 (C) )) can have.

In such a state, when light is incident on the reflectometer 110 from the outside, the direction of the reflected light Zr and the optical axis direction are not parallel, so that the reflected light Zr is moved from the center position P of the lens or image pickup device - It is incident at positions spaced apart by d1 in the X direction (FIG. 6 (A)) or the +X direction (FIG. 6 (C)).

As such, when the reflected light Zr is incident at a position deviating from the central position P, the reflected light Zr is reflected to the central position P by adjusting the position of the reflectometer 110 in the opposite direction to the initial position. The reference position of the system 110 is searched.

Specifically, when it is sensed that the reflected light Zr is incident at a position spaced apart by d1 in the -X direction from the central position P (FIG. 6 (A)), the reflected light Zr is detected at the central position P (FIG. 6 (B)) move the reflectometer 110 counterclockwise.

When it is sensed that the reflected light Zr is incident at a position spaced apart by d1 in the +X direction from the central position P (FIG. 6 (C)), until the reflected light Zr is detected at the central position P (FIG. 6 (B)) The reflectometer 110 is moved clockwise.

Through this process, when the direction of the reflected light Zr is parallel to the optical axis direction and the reflected light Zr is detected at the central position P, the reflectometer 110 position at this time is set as the reference position and output at the same time. The sensed value of the second Hall sensor 250 - 2 is stored as second reference position information in the memory unit 260 .

As described above, the driving device 100 of the present invention stores the reference position information of the reflectometer 110 in the memory unit 260 and uses it to check the reference position of the reflectometer 110 more quickly and accurately, In this way, it is possible to more precisely implement the image stabilization, so that it is possible to generate a higher quality image.

In the above, the embodiment of the present invention has been described based on an example in which the support frame 120 is rotated in the X-axis direction and the middle frame 130 (main frame 125) is rotated in the Y-axis direction. Therefore, if they are moved in a direction perpendicular to each other, the form of rotating the support frame 120 in the Y-axis direction and rotating the middle frame 130 (the main frame 125) in the X-axis direction is also possible.

7 is a view showing various embodiments of the driving magnets 250-1 and 250-2 and the sensing magnets 220 and 230 of the present invention. Hereinafter, the configuration of the driving magnets 250-1 and 250-2 and the sensing magnets 220 and 230 according to various embodiments of the present invention will be described in detail with reference to FIG. 7 .

Usually, the initial position is set when the distance between the magnet and the hall sensor is closest. In the case of a single-pole magnetized magnet, the largest magnetic force is detected at the initial position, and in the case of a two-pole (multipole) magnetized magnet, the initial position is caused by the diffusion of magnetic force. A magnetic force of “0” is sensed at the position.

When a moving object equipped with a magnet moves in a positive or negative direction based on the initial position, both negative and positive magnetic forces are detected in a multipolar magnet, whereas in a unipolar magnetized magnet, a negative magnetic force or Of the positive magnetic forces, only one magnetic force is sensed.

Therefore, it is possible to detect a larger change in magnetic force compared to the change in magnetic force detected by the multipolar magnet, which is detected by the hall sensor in the multipolar magnet.

As such, when the magnet sensed by the Hall sensor is implemented as a two-pole (multi-pole) magnetized magnet, if the magnetic force section detected by the Hall sensor is further expanded, the expanded section can be used for magnetic force sensing, thereby increasing the resolution of the Hall sensor. The directionality of the magnetic force (positive and negative directions) can be effectively reflected in the position detection, so that OIS driving can be implemented more precisely.

The present invention shown in FIG. 7 corresponds to an embodiment that can more effectively utilize a multi-pole magnetized magnet and minimize the magnetic field interference force that may be generated between the driving magnets.

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, consists of one pole (either N or S pole) is referred to as a unipolar magnetized magnet, and the A case in which the magnetic pole surface of the exposed magnet, that is, the magnetic pole surface of the magnet facing the Hall sensor, is made of a plurality of poles is referred to as a multipole magnetized magnet.

That is, the multi-pole magnetizing magnet means a magnet in which both the N pole and the S pole face the Hall sensor, and according to the embodiment, a magnet in which two or more N poles and two or more S poles are all disposed to face the Hall sensor includes

As described above, the main frame 125 of the present invention is provided with a first driving magnet 210-1 to generate a driving force for rotational movement in the Y-axis direction, and the support frame 120 of the present invention has the X-axis A second driving magnet 210 - 2 is provided to generate a driving force for directional rotational movement.

As will be described later, one of the first driving magnets 210-1 or the second driving magnets 210-2 is single It is preferable that the pole consists of two or more poles.

When described with reference to the coil generating electromagnetic force in the magnet, one of the first driving magnet 210 - 1 or the second driving magnet 210 - 2 has a surface facing the coil corresponding to itself as a single pole. and the other one preferably has two or more poles on the surface facing the coil corresponding to itself.

Specifically, in one embodiment, as shown in FIG. 7 (a), the second driving magnet 210-2 is configured such that a surface facing the second coil 150-2 is made of a single pole, and the first driving magnet 210-2 is configured as a single pole. The magnet 210-1 may be configured such that a surface facing the first coil 150-1 has two or more poles.

In this case, the second hall sensor 250-2 may be configured to detect the position of the second driving magnet 210-2 provided in the support frame 120, but as described above, unipolar magnetization (single pole) ), since the efficiency of position sensing is low, as shown in FIG. 7 (a), the second sub-magnet ( It is preferable to configure the 230 to be provided to be spaced apart from the second driving magnet 210 - 2 and the second hall sensor 250 - 2 to detect the position of the second sub-magnet 230 .

From a corresponding point of view, the middle frame 130 , that is, the main frame 125 may additionally include a sensing magnet for only position sensing, but since the second driving magnet 210 itself is implemented as a multi-pole (two-pole), the first It is preferable to configure the hall sensor 250-1 to detect the position of the first driving magnet 210-1 itself.

However, even in this case, in order to fully utilize the larger movement range of the end, a sensing magnet (first sub-magnet 220) made of two or more poles is installed at the end of the main frame 125 with a first driving magnet 210- It goes without saying that it is provided to be spaced apart from 1) and configured so that the first hall sensor 250 - 1 detects the position of the second sub-magnet 230 .

Contrary to the case described above according to the embodiment, as shown in FIG. 7(b) , the second driving magnet 210-2 has two or more poles on the surface facing the second coil 150-2. and the first driving magnet 210-1 may be configured such that a surface facing the first coil 150-1 is made of a single pole.

In this case, the first hall sensor 250-1 may be configured to detect the position of the first driving magnet 210-1 provided in the main frame 125, but as described above, unipolar magnetization (single pole) ), since the efficiency of position sensing is low, as shown in FIG. Preferably, the magnet 220 is provided to be spaced apart from the first driving magnet 210-1, and the first hall sensor 250-1 is configured to detect the position of the second sub-magnet 230.

From a corresponding point of view, the support frame 120 may additionally include a sensing magnet for only position sensing, but since the second driving magnet 210-2 itself is implemented as a multi-pole (two-pole), the second hall sensor 250 -2) is preferably configured to detect the position of the second driving magnet 210-2 itself.

However, even in this case, in order to fully utilize the larger movement range of the end, a sensing magnet (second sub-magnet 230) made of two or more poles is installed at the end of the support frame 120 with a second driving magnet 210- 2) and the second hall sensor 250-2 may be configured to detect the position of the first sub-magnet 220, of course.

In this way, when the plurality of driving magnets 250-1 and 250-2 are configured to have different polarity arrangements, in contrast to the case where the driving magnets 250-1 and 250-2 have the same type of polarity arrangement, It is possible to reduce the influence of the magnetic field generated by a specific driving magnet on other driving magnets, so that the control of movement or rotation in each direction by each driving magnet can be implemented more independently and accurately.

Furthermore, by configuring the plurality of driving magnets 250-1 and 250-2 to have different polarity arrangements, and at the same time by additionally providing a sensing magnet consisting of two or more poles in a moving body provided with a single-pole magnetized driving magnet. The control of movement or rotation movement can be implemented more independently and accurately, and at the same time, OIS driving can be implemented more precisely through accurate position detection of the Hall sensor.

8 is a diagram schematically illustrating the configuration of a reference information setting device (hereinafter referred to as a 'setting device') 300 of the optical system driving device 100 according to a preferred embodiment of the present invention, and FIG. It is a view showing a preferred embodiment of the present invention for adjusting the output signal received by the receiver 340 to correspond to the reference alignment position by moving the system 110 in the X-axis direction or the Y-axis direction.

Hereinafter, with reference to FIGS. 8 and 9 , the setting device 300 of the present invention for measuring the reference position information of the optical system driving device and storing it in the memory unit 260 provided in the driving device 100 will be described. do.

As shown in FIG. 8 , the setting device 300 of the present invention may include a generator 310 , an optical system driver 320 , an input unit 330 , a receiver 340 , and a main controller 350 . .

First, after the driving device 100 , which is the measurement target of the reference position information, is located in the jig means 20 , the generator 310 of the present invention outputs a test signal to the driving device 100 .

If it can be used in the process of inspecting the position of the optical system 110 provided in the driving device 100, the test signal may be formed in various forms, such as a light signal such as visible light, a laser, or an image including a sample pattern. .

The test signal incident to the optical system 110 is output from the optical system 110 in various forms, such as being refracted, reflected, or passed through the optical system 110 .

For example, when the optical system 110 is implemented as a lens, the test signal incident to the optical system 110 is refracted in the optical system 110 or passed through the optical system 110 according to the shape or angle of the lens. .

When the optical system 110 is implemented as a reflection system such as a mirror or a prism, the test signal incident to the optical system 110 is output in a form reflected by the optical system 110 according to the position or posture of the reflection system.

An output signal that is a test signal output from the optical system 110 is received or incident on the receiver 340 of the present invention. If the output signal can be received, the receiver 340 of the present invention may be implemented in various forms such as a camera and a light receiving sensor.

According to the embodiment, the receiver 340 of the present invention may represent a reference alignment position (O) as illustrated in FIG. 9 . With this reference alignment position O as a target point, the reference position of the optical system 110 can be measured through the control of the optical system driver 320 as will be described later.

When the optical system 110 is out of the reference position or the alignment position, the output signal is sensed at a point (Px, Py) spaced apart from the reference alignment position (O) of the receiver 340 as illustrated in FIG. 9 (A). do.

In this state, the optical system driver 320 of the present invention applies power to the coil provided in the driving device 100 to move the optical system 110 in a first direction (Y-axis direction) or a second direction perpendicular to the optical axis. By moving (X-axis direction), the position of the output signal sensed at the point (Px, Py) is moved to the reference alignment position (O) direction.

On the other hand, the input unit 330 of the present invention receives a sensed value from the Hall sensor provided in the driving device 100, and as described above, the optical system 110 is moved in the first direction or the second direction by the control of the optical system driving unit 320. As the Hall sensor moves in two directions, the Hall sensor also senses the position of the optical system 110 in both the first direction or the second direction, so that the input unit 330 has a sensed value for the first direction and a sensed value for the second direction. will be input

As the process of the optical system driver 320 moving the position of the output signal in the reference alignment position (O) direction is repeatedly performed, the output signal is gradually moved to the reference alignment position (O) point of the receiver 340, Finally, the receiver 340 moves to a position corresponding to the reference alignment position (O).

When the output signal is moved to a position corresponding to the reference alignment position (O) or recognized at a position corresponding to the reference alignment position (O), this means that the optical system 110 has moved to the reference position, so the main controller of the present invention Reference numeral 350 stores the Hall sensor sensed value at the time in the memory unit 260 provided in the driving device 100 .

In this way, the setting device 300 of the present invention is an optical system 110 provided in the driving device 100 together with various other configurations through simple processing of receiving a signal output from the generator 310 in the receiver 340 . Since it is configured to measure the reference position information of , it is possible to further improve the efficiency of measurement processing.

Depending on the embodiment, the generator 310 and the receiver 340 of the present invention may be arranged to configure various positional relationships. That is, the positional relationship between the generator 310 and the receiver 340 may be changed to correspond to the purpose of the test and various parameters of the test object, such as the purpose of the test object, internal design, and characteristics.

For example, when the driving device 100 provided with the reflectometer 110 is a test target, the reflectometer 110 reflects the test signal from the reference position in a direction perpendicular thereto, so the generator 310 of the present invention. and the receiver 340 are preferably provided at positions perpendicular to each other with respect to the driving device 100 .

As described above, the setting device 300 of the present invention is configured to be able to change the positions of the generator 310 and the receiver 340 to correspond to various parameters of the test target and the purpose of the test, so that it can be applied more universally.

In the above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto and will be described below with the technical idea of the present invention by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims.

In the above description of the present invention, modifiers such as first, second, sub, etc. are only instrumental terms used to relatively distinguish between components, so to indicate a specific order, priority, etc. It should be construed as not a term used for

The accompanying drawings for the purpose of explaining the present invention and illustrating examples thereof may be shown in a somewhat exaggerated form in order to emphasize or highlight the technical contents of the present invention, but the above-described contents and matters shown in the drawings, etc. It should be construed as apparent that various types of modification application examples may be possible at the level of those skilled in the art in consideration of this.

100: optical system driving device
110: optical system 120: support frame
125: main frame 130: middle frame
140: base frame 150-1: first coil
150-2: second coil 160-1: first groove rail
160-2: second groove rail 170-1: first guide rail
170-2: second guide rail 180: first yoke
190: second yoke 200: driving unit
210-1: first driving magnet 210-2: second driving magnet
220: first sub-magnet 230: second sub-magnet
250-1: first hall sensor 250-2: second hall sensor
260: memory unit 300: reference information setting device
310: generator 320: optical system driving unit
330: input unit 340: receiver
350: main control unit

Claims (8)

a main frame provided with a reflectometer that reflects the light of the subject incident from the outside in the direction of the lens of the camera module;
a base frame for accommodating the main frame;
a driving unit for rotationally moving the main frame in a first direction perpendicular to the optical axis based on the base frame; and
a first Hall sensor for sensing a position of the reflectometer with respect to the first direction; and
As information on the position at which the reflectometer is aligned in the first direction, first reference position information, which is a sensing value output by the first Hall sensor when the direction of light reflected by the reflectometer becomes parallel to the optical axis direction, is a stored memory unit;
and the driving unit sets a reference initial position in the first direction of the reflectometer by using the first reference position information. According to claim 1, wherein the driving unit,
a first driving magnet provided in the main frame; and
A memory unit mounted on a circuit board and comprising a first coil that generates electromagnetic force in the first driving magnet to move the main frame in a first direction perpendicular to the optical axis with respect to the base frame. optical system drive. delete delete 3. The method of claim 2,
Optical system driving apparatus with a memory unit, characterized in that it is provided on the main frame spaced apart from the first driving magnet, and further comprises a first sub-magnet having a surface facing the first hall sensor having two or more poles. . The method of claim 2, wherein the mainframe comprises:
a support frame on which the reflectometer is installed and provided with a second driving magnet; and
Including a middle frame provided with the first driving magnet,
A second coil mounted on the circuit board and generating an electromagnetic force to the second driving magnet to move the support frame in a second direction perpendicular to the optical axis with respect to the middle frame,
The memory unit further stores second reference position information, which is information on a position where the reflector is aligned in the second direction. 7. The method of claim 6,
Further comprising a second Hall sensor for sensing the position of the reflectometer based on the second direction,
The second reference location information,
The optical system driving apparatus with a memory unit, characterized in that the sensing value output by the second Hall sensor when the direction of the light reflected by the reflector becomes parallel to the optical axis direction. 8. The method of claim 7,
Optical system driving apparatus with a memory unit, characterized in that it is provided on the support frame spaced apart from the second driving magnet, and further comprises a second sub-magnet having a surface facing the second hall sensor having two or more poles. .

Images