KR20200085208A - Apparatus and method of controlling actuator - Google Patents

Abstract

According to one embodiment of the present invention, an actuator control apparatus includes: an actuator changing an optical path of a lens; and a control part controlling the actuator. The actuator includes: first and second driving parts placed on a first side of a lens support member; and third and fourth driving parts placed on a second side of the lens support member. A first distance between the first and second driving parts is different from a second distance between the third and fourth driving parts. The first and fourth driving parts are located diagonally from each other. The control part applies a first current to the second and third driving parts, the control part applies a second current to the first and fourth driving parts, and an absolute value of the first current and an absolute value of the second current are different from each other when the lens is moved in a diagonal direction.

Description

Actuator control device and method{APPARATUS AND METHOD OF CONTROLLING ACTUATOR}

The present invention relates to a camera, and more particularly, to a camera actuator control device and a camera shake correction method thereof.

The camera is a device that photographs a subject as a photo or video, and may have an optical image stabilization (OIS) function or an auto focusing (AF) function in order to improve the image quality. The camera shake correction function may be performed by a method of moving the lens in a direction perpendicular to the optical axis, and the autofocusing function may be performed by a method of moving the lens in the direction of the optical axis.

To this end, the camera may include an actuator that moves the lens.

Generally, the actuator can be arranged on four sides or four corners, and the actuator outline can be square shaped. However, since the image sensor embedded in the camera has a 4:3 or 16:9 ratio, the actuator should be arranged in a square shape according to the long axis length of the image sensor. Accordingly, there is a problem that the size of the camera increases due to the actuator.

The technical problem to be achieved by the present invention is to provide a camera actuator control device and a camera shake correction method.

An actuator control apparatus according to an embodiment of the present invention includes an actuator for changing an optical path of a lens; And a control unit controlling the actuator, wherein the actuator includes a first driving unit and a second driving unit disposed on a first side of the lens support member, and a third driving unit and a fourth driving unit disposed on the second side of the lens support member. A first distance between the first driving part and the second driving part is different from the second distance between the first driving part and the third driving part, and the first driving part and the fourth driving part are diagonal to each other. Located in, the control unit applies a first current to the second driving unit and the third driving unit, the control unit applies a second current to the first driving unit and the fourth driving unit, and the lens moves in a diagonal direction. When the absolute value of the first current and the absolute value of the second current are different from each other.

An actuator control apparatus according to another embodiment of the present invention includes an actuator for changing the optical path of the lens; And a control unit controlling the actuator, wherein the actuator includes a first driving unit and a second driving unit disposed on a first side of the lens support member, and a third driving unit and a fourth driving unit disposed on the second side of the lens support member. A first distance between the first driving unit and the second driving unit is different from the second distance between the first driving unit and the third driving unit, and the control unit includes the second driving unit and the third driving unit. A first current is applied, and the controller applies a second current to the first driver and the fourth driver, and the current value of the first current and the current value of the second current are the first distance and the first It is determined using at least one of 2 distances and the tilting direction of the lens.

The first driving part and the fourth driving part are positioned diagonally to each other, and when the lens moves in the diagonal direction, the absolute value of the first current and the absolute value of the second current may be different from each other.

When the lens moves in the vertical direction, which is the direction of the first distance, or in the horizontal direction, which is the direction of the second distance, the absolute value of the first current and the absolute value of the second current may be the same.

The current value of the first current and the current value of the second current may vary depending on the tilting direction of the lens.

The distance between the third driving part and the fourth driving part may be the first distance, and the distance between the second driving part and the fourth driving part may be the second distance.

The first distance may be shorter than the second distance.

The first driving part and the fourth driving part may move in different directions.

The absolute value of the first current when the lens is tilted in the left-right direction may be greater than the absolute value of the first current when the lens is tilted in the vertical direction.

The actuator is an actuator for correcting the shaking of the lens, and the control unit can generate a signal for operating the actuator using a value sensed by a gyro sensor.

The actuator may be an actuator for adjusting the focal length of the lens.

The lens support member may be a shaper member that reversibly deforms the shape of the lens by pressing the lens.

The lens support member may be a lens barrel that accommodates the lens and moves together with the lens.

A camera shake correction method according to an embodiment of the present invention comprises the steps of sensing a tilting direction of a lens, generating a signal to control the movement of the lens according to the tilting direction of the lens, and of the lens according to the controlling signal. Compensating the tilting direction, and correcting the tilting direction is applied to the driving units based on the distance between the driving units moving the lens, the position of the driving units moving the lens and the sensed tilting direction of the lens. The current value of the current is determined and the current value of the applied current is different according to the tilting direction of the lens to be corrected.

When the tilting direction of the corrected lens is the vertical direction or the left and right directions, the absolute value of the current applied to the driving units is the same, and the absolute value of the current applied to the driving units when the tilting direction of the corrected lens is the vertical direction. The value is smaller than the absolute value of the current applied to the driving units when the tilting direction of the corrected lens is the left-right direction, and the value of the current applied to some of the driving units when the tilting direction of the corrected lens is diagonal. The absolute value may be different from the absolute value of the current applied to other parts.

Generating a signal for controlling the operation of the lens to correct the shaking of the lens comprises: generating a first control value for controlling the operation of the lens according to the degree of distortion of the optical axis of the lens, and moving the lens And generating a second control value correcting the first control value using the distance and the position between the driving units.

The driving parts include a first driving part and a second driving part arranged on a first side of the lens support member, and a third driving part and a fourth driving part arranged on the second side of the lens support member, wherein the first driving part and the The first distance between the second driving units is different from the second distance between the first driving unit and the third driving unit, and the first driving unit and the fourth driving unit are positioned diagonally to each other, and the second driving unit and the third driving unit When the first current is applied to the driving unit, the second current is applied to the first driving unit and the fourth driving unit, and when the lens moves in a diagonal direction, the absolute value of the first current and the absolute value of the second current are It can be different.

According to the embodiment of the present invention, a compact camera having an image stabilization function and an autofocusing function can be obtained. In particular, according to the embodiment of the present invention, it is possible to precisely correct the shaking in various directions in a plane perpendicular to the optical axis.

1 is a cross-sectional view of a camera according to an embodiment of the present invention.
2 is a perspective view showing a camera according to another embodiment of the present invention.
3A is a perspective view of the shield can removed from the camera illustrated in FIG. 2, and FIG. 3B is a plan view of the camera illustrated in FIG. 3A.
4A is a perspective view of the first camera module shown in FIG. 3A, and FIG. 4B is a side cross-sectional view of the first camera module shown in FIG. 4A.
FIG. 5A is a one-way perspective view of the second actuator in the camera of the embodiment shown in FIG. 2, and FIG. 5B is another perspective view of the second actuator in the camera module of the embodiment shown in FIG. 2.
6A is a perspective view of a second circuit board and a driver of the second actuator of FIG. 5A, FIG. 6B is a partially exploded perspective view of the second actuator of the embodiment shown in FIG. 5B, and FIG. 6C is a perspective view of the embodiment shown in FIG. 5B 2 is a perspective view of the second circuit board is removed from the actuator.
7 is a block diagram for camera shake correction according to an embodiment of the present invention.
8 is a flowchart illustrating a camera shake correction method according to an embodiment of the present invention.
9(a) shows the arrangement relationship of the actuator included in the camera according to an embodiment of the present invention, and FIG. 9(b) shows the motion tracking of the lens according to the arrangement relationship of FIG. 9(a).
10(a) shows the arrangement relationship of the actuator included in the camera according to another embodiment of the present invention, and FIG. 10(b) shows the motion tracking of the lens according to the arrangement relationship of FIG. 10(a).
FIG. 11 shows a two-channel control structure in the actuator illustrated in FIG. 9.
12 shows the principle for calculating the control value in the actuator illustrated in FIG. 9.
13 shows simulation results in the actuator illustrated in FIG. 9.
FIG. 14 shows a two-channel control structure in the actuator illustrated in FIG. 10.
15 to 16 show the principle for calculating the control value in the actuator illustrated in FIG. 10.
17 shows simulation results in the actuator illustrated in FIG. 10.
18 is a perspective view of an actuator for AF or Zoom according to another embodiment of the present invention.
19 is a perspective view of some components omitted from the actuator according to the embodiment illustrated in FIG. 18.
20 is an exploded perspective view of some components omitted from the actuator according to the embodiment illustrated in FIG. 18.
FIG. 21A is a perspective view of the first lens assembly 2110 in the actuator according to the embodiment illustrated in FIG. 20, and FIG. 21B is a perspective view of some components removed from the first lens assembly 2110 shown in FIG. 21A.
22 is a perspective view of a third lens assembly 2130 in the actuator according to the embodiment shown in FIG. 20.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical spirit of the present invention is not limited to some embodiments described, but may be implemented in various different forms, and within the technical spirit of the present invention, one or more of its components between embodiments may be selectively selected. It can be used by bonding and substitution.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention, unless explicitly defined and described, can be generally understood by those skilled in the art to which the present invention pertains. It can be interpreted as meaning, and commonly used terms, such as predefined terms, may interpret the meaning in consideration of the contextual meaning of the related technology.

In addition, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention.

In the present specification, a singular form may also include a plural form unless specifically stated in the phrase, and is combined with A, B, and C when described as "at least one (or more than one) of A and B, C". It can contain one or more of all possible combinations.

In addition, in describing components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used.

These terms are only for distinguishing the component from other components, and the term is not limited to the nature, order, or order of the component.

And, when a component is described as being'connected','coupled' or'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also to the component It may also include the case of'connected','coupled' or'connected' due to another component between the other components.

Further, when described as being formed or disposed in the "top (top) or bottom (bottom)" of each component, the top (top) or bottom (bottom) is one as well as when the two components are in direct contact with each other It also includes a case in which another component described above is formed or disposed between two components. In addition, when expressed as "up (up) or down (down)", it may include the meaning of the downward direction as well as the upward direction based on one component.

1 is a cross-sectional view of a camera according to an embodiment of the present invention.

Referring to FIG. 1, the camera 100 includes a housing 110, a lens unit 120, an image sensor 130, an actuator 140, and a control unit 150.

The housing 110 accommodates the lens unit 120, the image sensor 130, the actuator 140, and the control unit 150.

The lens unit 120 includes an IR (InfraRed) filter 122, a plurality of lenses 124 disposed on the IR filter 122, and a lens barrel 126 coupled with the plurality of lenses 124. . A space for accommodating at least a portion of the IR filter 122 and the plurality of lenses 124 may be provided inside the lens barrel 126. The lens barrel 126 may be rotationally combined with one or a plurality of lenses, but this is exemplary, and may be combined in other ways, such as a method using an adhesive (for example, an adhesive resin such as epoxy). .

The housing 110 may be coupled to the lens barrel 126 to support the lens barrel 126. The control unit 150 may be implemented as a printed circuit board or a drive IC, and an image sensor 130 may be mounted on the printed circuit board. The housing 110 and the lens barrel 126 may be glued through an adhesive, integrally formed, or fastened. Alternatively, a spring may be disposed between the housing 110 and the lens barrel 126. However, in Figure 1, the shape of the housing 110, the shape of the lens barrel 126, the coupling relationship between the housing 110 and the lens barrel 126, the number of lenses 124, the position of the IR filter 122, etc. It is exemplary and can be variously modified.

Meanwhile, the actuator 140 is disposed on the lens barrel 126 to move the lens 124. Here, the actuator 140 may be an actuator for autofocusing for adjusting the focal length of the lens 124 by moving the lens 124 in the optical axis direction. Alternatively, the actuator 140 may be an actuator for OIS for correcting the shaking of the lens 124 by moving the lens 124 in a direction perpendicular to the optical axis, that is, in a direction parallel to the surface on which the lens 124 is disposed. .

FIG. 2 is a perspective view showing a camera according to another embodiment of the present invention, FIG. 3A is a perspective view of a shield can removed from the camera shown in FIG. 2, and FIG. 3B is a plan view of the camera shown in FIG. 3A.

Referring to FIG. 2, the camera 1000 may include a single or multiple camera modules. For example, an embodiment may include a first camera module 1000A and a second camera module 1000B. The first camera module 1000A and the second camera module 1000B may be covered by a predetermined shield can 1510.

2, 3A, and 3B together, in an embodiment, the first camera module 1000A may include a single or multiple actuators. For example, the first camera module 1000A may include a first actuator 1100 and a second actuator 1200.

The first actuator 1100 may be electrically connected to the first group of circuit boards 1410, and the second actuator 1200 may be electrically connected to the second group of circuit boards 1420, and the second group of The circuit board 1420 may be electrically connected to the first group of circuit boards 1410, and the second camera module 1000B may be electrically connected to the third group of circuit boards 1430.

The first actuator 1100 may be a zoom actuator or an auto focus (AF) actuator. For example, the first actuator 1100 supports one or a plurality of lenses and moves the lens up and down according to a control signal of a predetermined control unit to perform an auto focusing function or a zoom function.

The second actuator 1200 may be an OIS (Optical Image Stabilizer) actuator.

The second camera module 1000B may include a fixed focal length les disposed in a predetermined tube (not shown). The fixed focal length lens may also be referred to as a “single focal length lens” or a “short lens”.

The second camera module 1000B is disposed in a predetermined housing (not shown), and may include an actuator (not shown) capable of driving the lens unit. The actuator may be a voice coil motor, a micro actuator, a silicon actuator, and the like, and may be applied in various ways such as an electrostatic method, a thermal method, a bimorph method, and an electrostatic force method, but is not limited thereto. The second camera module 1000B may be the camera 100 according to the embodiment of FIG. 1.

Next, FIG. 4A is a perspective view of the first camera module illustrated in FIG. 3A, and FIG. 4B is a side cross-sectional view of the first camera module illustrated in FIG. 4A.

Referring to FIG. 4A, the first camera module 1000A is disposed on one side of the first actuator 1100 having a zooming function or AF function, and a second actuator 1200 having an OIS function. It can contain.

Referring to FIG. 4B, the first actuator 1100 may include an optical system and a lens driver disposed on the base 20. For example, at least one of the first lens assembly 1110, the second lens assembly 1120, the third lens assembly 1130, and the guide pin 50 may be disposed on the base 20.

Also, the first actuator 1100 may include a coil driving unit 1140 and a magnet driving unit 1160 to perform a high magnification zooming function.

For example, the first lens assembly 1110 and the second lens assembly 1120 may be moving lenses that move through the coil driving unit 1140, the magnet driving unit 1160, and the guide pin 50, , The third lens assembly 1130 may be a fixed lens, but is not limited thereto.

For example, the first lens assembly 1110 and the second lens assembly 1120 may be driven by electromagnetic force by interaction of the coil driving unit 1140 and the magnet driving unit 1160, through which the actuator according to the embodiment And the camera module, to solve the problem of the lens decenter (tilt) occurs when zooming, the alignment (align) between a plurality of lens groups is well aligned to prevent the angle of view changes or out of focus, The image quality and resolution can be significantly improved.

Also, the first actuator 1100 may include a first group of circuit boards disposed outside the base 20 and an element unit 1150 including a gyro sensor.

Also, a predetermined image sensor unit 1190 may be disposed perpendicular to the optical axis direction of parallel light.

Next, the second actuator 1200 may include a housing 1210, a shake correction unit 1220 disposed in the housing 1210, and a prism unit 1230 disposed on the shake correction unit 1220. . The shake correction unit 1220 includes a shaper member 1222 and a lens member 1224, and may include a magnet driving unit 72M and a coil driving unit 72C. Here, the lens member 1224 may be mixed with a liquid lens, a fluid lens, a variable prism, and the like, and the shape of the lens member 1224 is reversibly deformed by pressure applied to the surface of the lens member 1224, and accordingly the lens The optical path through member 1224 may be changed. For example, the lens member 1224 may include a fluid surrounded by an elastic membrane, and the shaper member 1222 is coupled to, connected to, or in direct contact with the lens member 1224, and the shape of the shaper member 1222 is performed. A pressure is applied to the lens member 1224 by movement, and accordingly, the shape of the lens member 1224 is reversibly deformed, and an optical path passing through the lens member 1224 may be changed. As will be described later, the movement of the shaper member 1222 may occur by interaction between the magnet driving unit 72M and the coil driving unit 72C.

To this end, the second actuator 1200 may be electrically connected to the second group of circuit boards.

As described above, the OIS can be implemented through control of the optical path through the lens member 1224, thereby minimizing the occurrence of decent or tilt and providing the best optical characteristics.

On the other hand, when the OIS actuator and the AF or Zoom actuator are disposed according to an embodiment of the present invention, magnetic field interference with the AF or Zoom magnet during OIS driving can be prevented. Since the magnet driving part 72M of the second actuator 1200 is disposed separately from the first actuator 1100, magnetic field interference between the first actuator 1100 and the second actuator 1200 may be prevented.

Hereinafter, the detailed structure of the second actuator will be described in more detail.

FIG. 5A is a one-way perspective view of the second actuator in the camera of the embodiment shown in FIG. 2, and FIG. 5B is another perspective view of the second actuator in the camera module of the embodiment shown in FIG. 2. 6A is a perspective view of a second circuit board and a driver of the second actuator of FIG. 5A, FIG. 6B is a partially exploded perspective view of the second actuator of the embodiment shown in FIG. 5B, and FIG. 6C is an embodiment of the embodiment shown in FIG. 5B 2 is a perspective view of the second circuit board is removed from the actuator.

Referring to FIGS. 5A to 6C, by arranging the shake correction unit 1220 under the prism unit 1230, when the OIS is implemented, the size limitation of the lens in the lens assembly of the optical system can be solved to secure a sufficient light amount.

The second circuit board 1250 may be connected to a predetermined power supply unit (not shown) to apply power to the coil driving unit 72C. The second circuit board 1250 includes a circuit board having a wiring pattern that can be electrically connected, such as a rigid printed circuit board (Rigid PCB), a flexible printed circuit board (Flexible PCB), a flexible printed circuit board (Rigid Flexible PCB) can do.

The coil driving unit 72C may include a single or multiple unit coil driving units, and may include a plurality of coils. For example, the driving unit 72C may include a first unit coil driving unit 72C1, a second unit coil driving unit 72C2, a third unit coil driving unit 72C3, and a fourth unit coil driving unit (not shown). .

In addition, the driving unit 72C may further include a hall sensor (not shown) to recognize the position of the magnet driving unit 72M described later. For example, the first unit coil driver 72C1 may include a first Hall sensor (not shown), and the third unit coil driver 72C3 may include a second Hall sensor (not shown).

On the other hand, as described above, the shaper member 1222 is disposed on the lens member 1224, and the shape of the lens member 1224 may be changed according to the movement of the shaper member 1222. At this time, the magnet driving unit 72M is disposed on the shaper member 1222, and the coil driving unit 72C may be disposed on the housing 1210.

Referring to FIG. 6B, the housing 1210 has a predetermined opening 1212H through which light can pass through the housing body 1212, extends upwards of the housing body 1212, and the coil driver 72C is disposed. It is possible to include a housing side portion 1214P where the hole 1214H is formed.

For example, the housing 1210 extends to the upper side of the housing body 1212, and a hole (1214P1) and a driving unit 72C are disposed so that the hole 1214H1 is formed so that the coil driving unit 72C is disposed. 1214H2) may include a second housing side 1214P2.

According to the embodiment, the coil driver 72C is disposed on the housing side 1214P, the magnet driver 72M is disposed on the shaper member 1222, and the coil driver 72C according to the voltage applied to the coil driver 72C And the shaper member 1222 may be moved by the electromagnetic force between the magnet driving unit 72M. Accordingly, the shape of the lens member 1224 is reversibly deformed, and the optical path passing through the lens member 1224 is changed to implement OIS.

More specifically, the shaper member 1222 may include a shaper body having a hole through which light can pass, and a protrusion extending laterally from the shaper body. The lens member 1224 is disposed under the shaper body, and the magnet driving unit 72M may be disposed on the protrusion of the shaper member 1222. For example, a portion of the magnet driving unit 72M may be disposed on a protrusion disposed on one side of the shaper member 1222, and the other portion may be disposed on a protrusion disposed on the other side of the shaper member 1222. . At this time, the magnet driving unit 72M may be disposed to be coupled to the shaper member 1222. For example, a groove is formed on the protrusion of the shaper member 1222, and the magnet driving unit 72M may be fitted into the groove.

Meanwhile, the fixed prism 1232 may be a right-angle prism, and may be disposed inside the magnet driving unit 72M of the shake correction unit 1220. In addition, a predetermined prism cover 1234 is disposed above the fixed prism 1232 so that the fixed prism 1232 can be closely coupled with the housing 1210.

7 is a block diagram for camera shake correction according to an embodiment of the present invention, and FIG. 8 is a flowchart illustrating a camera shake correction method according to an embodiment of the present invention. Here, the camera 2100 may be the camera 100 of FIG. 1 or the camera 1000 of FIGS. 2 to 6.

7 to 8, the sensor unit 2160 embedded in the camera 2100 detects at least one of a tilting direction and a tilting degree of the lens 2124 (S300). Here, the lens 2124 may be a lens 124 included in the camera 100 according to the embodiment of FIG. 1 or a lens included in the camera 1000 according to the embodiments of FIGS. 2 to 6. Here, the tilting of the lens 2124 may occur due to hand shaking or movement due to external vibration, and may be expressed as an amount in which the optical axis is distorted. The tilting direction of the lens 2124 may be a plane perpendicular to the optical axis, that is, a direction parallel to the surface on which the lens 2124 is disposed, and the degree of tilting of the lens 2124 is expressed as at least one of a tilting size and a tilting angle Can be. In order to detect at least one of the tilting direction and the tilting degree of the lens 2124, the sensor unit 2160 may include a gyro sensor, but is not limited thereto, and may sense or shake or move the camera 2100. Various sensors can be used.

Next, the control unit 2150 generates a signal for controlling the movement of the lens 2124 according to at least one of a tilting direction and a tilting degree of the lens 2124 sensed by the sensor unit 2160 (S310). In the present specification, the movement, movement, tilting, and operation of the lens 2124 may mean that the lens 124 directly moves together with the lens barrel 126 in the case of the camera 100 according to the embodiment of FIG. 1. , In the case of the camera 1000 according to the embodiment of FIGS. 2 to 6, it may mean that the shape of the lens member 1224 is reversibly deformed. Here, a signal for controlling the movement of the lens 2124 may be generated based on at least one of a movement direction, a movement angle, and a movement size that the lens 2124 must move to correct the tilting of the lens 2124. To this end, the control unit 2150 or the storage unit (not shown) connected to the control unit 2150 has a movement in which the lens 2124 should move to correct the tilting direction or tilting degree of the lens 2124 and the tilting of the lens 2124 The relationship between the direction, the motion angle and the motion size may be pre-matched and stored. The signal for controlling the movement of the lens 2124 may be expressed, for example, as a current value applied to the actuator 2140. Here, the actuator 2140 may be the actuator 140 according to the embodiment of FIG. 1 or the second actuator 1200 according to the embodiments of FIGS. 2 to 6. Then, the control unit 2150 may generate a first control value that controls the operation of the lens according to the degree to which the optical axis of the lens 2124 is distorted. Then, the control unit 2150 may generate a second control value that corrects the first control value by using a distance and a position between driving units that move the lens 2124.

Next, the actuator 2140 corrects the tilting direction of the lens 2124 according to a signal for controlling the movement of the lens 2124 generated in step S310 (S320). That is, the actuator 2140 moves the lens 2124 in at least one of a movement direction, a movement angle, and a movement size that the lens 2124 should move to correct the tilting of the lens 2124. Accordingly, the shaking of the camera 2100 can be optically corrected.

9(a) shows the arrangement relationship of the actuator included in the camera according to an embodiment of the present invention, and FIG. 9(b) shows the motion tracking of the lens according to the arrangement relationship of FIG. 9(a). 10(a) shows the arrangement relationship of the actuator included in the camera according to another embodiment of the present invention, and FIG. 10(b) shows the motion tracking of the lens according to the arrangement relationship of FIG. 10(a).

9(a), 9(b), 10(a) and 10(b), the lens 2124 is engaged with the lens support member 2126, and the lens support member 2126 and the actuator An actuator may be disposed between the outlines 2200. Here, the lens support member 2126 may be the lens barrel 126 of the camera 100 according to the embodiment of FIG. 1 or the shaper member 1222 of the camera 1000 according to the embodiments of FIGS. 2 to 6. Here, the actuator outline 2200 may be an inner surface of the housing 110 of the camera according to the embodiment of FIG. 1 or the housing 1210 of the second actuator 1200 according to the embodiments of FIGS. 2 to 6.

9(a), the actuator 400 includes a first driving unit 410, a second driving unit 420, a third driving unit 430, and a fourth driving unit 440, and the first driving unit 410 ) Is disposed on the first side of the lens support member 2126, the second drive unit 420 is disposed on the second side opposite to the first side of the lens support member 2126, and the third drive unit 430 is It is disposed on a third side between the first side and the second side of the lens support member 2126, and the fourth driving unit 440 may be disposed on a fourth side opposite the third side of the lens support member 2126. have. Accordingly, the first driving unit 410, the second driving unit 420, the third driving unit 430, and the fourth driving unit 440 of the actuator 400 may be arranged in a square shape.

Here, the first driving unit 410, the second driving unit 420, the third driving unit 430, and the fourth driving unit 440 are coils 412, 422, 432, 442, and magnets 414, 424, 434, respectively. 444). At this time, the coils 412, 422, 432, and 442 of each driving unit are disposed in the actuator outline 2200, and the magnets 414, 424, 434, and 444 of each driving unit are respectively coils 412, 422, of each driving unit. 432, 442) to be spaced apart a predetermined distance may be disposed on the side wall of the lens support member 2126.

Referring to FIG. 10(a), the actuator 500 includes a first driving unit 510, a second driving unit 520, a third driving unit 530, and a fourth driving unit 540, and the first driving unit 510 ) And the second driving part 520 are disposed on the first side of the lens support member 2126, and the third driving part 530 and the fourth driving part 540 face the first side of the lens support member 2126. It can be arranged on the second side. Here, the first side and the second side of the lens support member 2126 may be surfaces disposed in a short side direction of the rectangular shape image sensor 2130.

The first driving unit 510 and the fourth driving unit 540 may be arranged in diagonal directions with each other, and the second driving unit 520 and the third driving unit 530 may be arranged in diagonal directions with each other.

Accordingly, the first distance d1 between the first driving unit 510 and the second driving unit 520 is different from the second distance d2 between the first driving unit 510 and the third driving unit 530, and the first distance d2 is different. The first distance d1 between the driving unit 510 and the second driving unit 520 is the same as the first distance d1 between the third driving unit 530 and the fourth driving unit 540, and the first driving unit 510 The second distance d2 between the third driving units 530 may be the same as the second distance d2 between the second driving units 520 and the fourth driving units 540. In addition, the first distance d1, which is the distance between the first driving unit 510 and the second driving unit 520 and the distance between the third driving unit 530 and the fourth driving unit 540, is the first driving unit 510 and the third The distance between the driving units 530 and the distance between the second driving unit 520 and the fourth driving unit 540 may be shorter than the second distance d2.

For convenience of description, in this specification, the direction between the first driving unit 510 and the second driving unit 520 and the direction between the third driving unit 530 and the fourth driving unit 540 are referred to as vertical directions, and the first driving unit The direction between the 510 and the third driving unit 530 and the direction between the second driving unit 520 and the fourth driving unit 540 are called left and right directions, and the direction between the first driving unit 510 and the fourth driving unit 540 and The direction between the second driving unit 520 and the third driving unit 530 is called a diagonal direction.

Here, the first driving unit 510, the second driving unit 520, the third driving unit 530 and the fourth driving unit 540 are coils 512, 522, 532, 542, and magnets 514, 524, 534, respectively. 544). Here, the coils 512, 522, 532, and 542 mean the coil driving unit 72C in the camera according to the embodiments of FIGS. 2 to 6, and the magnets 514, 524, 534, and 544 are implemented in FIGS. 2 to 6 In the camera according to the example, it may mean the magnet driving unit 72M. At this time, the magnet 514 of the first driving unit 510 and the magnet 524 of the second driving unit 520 are spaced apart from each other on the first side of the lens support member 2126, and the first driving unit 510 The coil 512 and the coil 522 of the second drive unit 520 are magnets 514 of the first drive unit 510 on one side of the actuator outline 2200 facing the first side of the lens support member 2126. ) And the magnets 524 of the second driving unit 520 may be arranged in pairs to be spaced apart at predetermined intervals. Similarly, the magnet 534 of the third driving unit 530 and the magnet 544 of the fourth driving unit 540 are spaced apart from each other on the second side of the lens support member 2126, and the third driving unit 530 The coil 532 and the coil 542 of the fourth driving unit 540 are magnets of the third driving unit 530 on one side of the actuator outline 2200 facing the second side of the lens support member 2126 ( 534) and the magnets 544 of the fourth driving unit 540 may be arranged in pairs to be spaced apart at predetermined intervals. Accordingly, the first driving unit 510, the second driving unit 520, the third driving unit 530, and the fourth driving unit 540 of the actuator 500 may be arranged in a rectangular shape.

10(a) and 10(b), when the image sensor 2130 has a rectangular shape in a ratio of 4:3 or 16:9, the driver is not disposed on the long side of the image sensor 2130 , It is not necessary to secure an additional space between the lens support unit 2126 and the actuator outline 2200, and accordingly, the camera can be implemented in a small size. In addition, as shown in FIG. 10( b), since the movement of the lens is limited to the periphery of the image sensor 2130, the accuracy of correction is increased, and power consumption of the actuator can be reduced.

For convenience, an actuator arranged as shown in FIG. 9(a) may be referred to as a symmetrical actuator, and an actuator arranged as shown in FIG. 10(a) may be referred to as an asymmetric actuator.

Hereinafter, a method of controlling an actuator according to an embodiment of the present invention will be described in detail. Hereinafter, the method for correcting the shaking will be described as an example, but the present invention is not limited thereto, and the control method of the actuator described herein may be applied to the same or similarly to autofocusing.

FIG. 11 shows a two-channel control structure in the actuator illustrated in FIG. 9, FIG. 12 shows a principle for calculating control values in the actuator illustrated in FIG. 9, and FIG. 13 simulates in the actuator illustrated in FIG. 9 Results are shown.

Referring to FIG. 11, as described above, the actuator 400 includes a first driving unit 410, a second driving unit 420, a third driving unit 430, and a fourth driving unit 440, and is disposed in the vertical direction. The third driving unit 430 and the fourth driving unit 440 facing each other form the first channel C1, and the first driving unit 410 and the second driving unit 420 facing each other are disposed in the left and right directions. It is assumed that 2 channels C2 are formed. The first current is applied to the coils 432 and 442 of the first channel C1, and the coils 432 and 442 of the first channel C1 are wound in opposite directions, so that the magnet 434 of the first channel C1 is wound. , 444) have opposite polarities, and a second current is applied to the coils 412 and 422 of the second channel C2, and the coils 412 and 422 of the second channel C2 are wound in opposite directions. The magnets 414 and 424 of the second channel C2 have opposite polarities.

Referring to FIG. 12, the first driving unit 410, the second driving unit 420, the third driving unit 430, and the fourth driving unit 440 are on the x and y axes of the actuator, and the third driving unit 430 ) And the first channel C1 between the fourth driver 440 and the second channel C2 between the first driver 410 and the second driver 420 are orthogonal to each other.

과 2ⅹ2 특성벡터

를 이용하면, 출력벡터

의 각도와 크기를 얻을 수 있으며, 특성벡터

는 하기 수학식 1과 같이 나타낼 수 있다. Where 2ⅹ1 input vector

And 2ⅹ2 characteristic vector

Using, the output vector

The angle and size of can be obtained and the characteristic vector

Can be represented as in Equation 1 below.

Here, a is a value indicating the distance between the driving units arranged in the first channel C1, and b is a value indicating the distance between the driving units arranged in the second channel C2. When the actuator 400 is arranged in a square shape as illustrated in FIG. 9, a and b may be the same.

인 것을 예로 들어 설명하면, 출력벡터

의 각도 및 크기는 하기 수학식 2 내지 3과 같이 나타낼 수 있다.

For example, output vector

The angle and size of can be expressed as Equations 2 to 3 below.

In a more specific embodiment, referring to Table 1 and FIG. 13, when the angle θ of the output vector is 0 and r, the magnitude of the output vector, is 1, the first current applied to the first channel C1 is 0, the second current applied to the second channel C2 is 1, and the first driver 410 and the second driver 420 of the second channel C2 may have opposite polarities. When the angle θ of the output vector is π/4 and the magnitude of the output vector r is 1, the first current applied to the first channel C1 is 0.7, and the second applied to the second channel C2. 2 The current is equal to 0.7, and the third driving part 430 and the fourth driving part 440 of the first channel C1 have opposite polarities, and the first driving part 410 and the second driving part of the second channel C2. The driving unit 420 may have opposite polarities. When the angle (θ) of the output vector is π/2 and the magnitude of the output vector r is 1, the first current applied to the first channel C1 is 1, and the second applied to the second channel C2. 2 The current is 0, and the third driver 430 and the fourth driver 440 of the first channel C1 may have opposite polarities. When the angle θ of the output vector is 3π/4 and the magnitude of the output vector r is 1, the first current applied to the first channel C1 is 0.7, and the second applied to the second channel C2. 2 The current is -0.7, and the third driving unit 430 and the fourth driving unit 440 of the first channel C1 have opposite polarities, and the first driving unit 410 and the second driving unit of the second channel C2 are 420 may have opposite polarity.

No. Angle (θ) R r/2 C1(*r) C2(*r) C1(*r) C2(*r) One 0 One 0 0.5 0 2 π/4 0.7 0.7 0.35 0.35 3 π/2 0 One 0 0.5 4 3π/4 -0.7 0.7 -0.35 0.35 5 π -One 0 -0.5 0 6 5π/4 -0.7 -0.7 -0.35 -0.35 7 3π/2 0 -One 0 -0.5 8 7π/4 0.7 -0.7 0.35 -0.35

FIG. 14 shows a two-channel control structure in the actuator illustrated in FIG. 9, FIGS. 15 to 16 show principles for calculating control values in the actuator illustrated in FIG. 10, and FIG. 17 illustrates the actuator illustrated in FIG. 10 The simulation results at.

Referring to FIG. 14, as described above, the actuator 500 includes a first driver 510, a second driver 520, a third driver 530, and a fourth driver 540, and the first driver ( The direction of the first distance indicating the distance between the 510 and the second driving unit 520 and the distance between the third driving unit 530 and the fourth driving unit 540 is referred to as a vertical direction, and the first driving unit 510 and the third driving unit The direction of the second distance indicating the distance between 530 and the distance between the second driving unit 520 and the fourth driving unit 540 is called a left-right direction, and the direction between the first driving unit 510 and the fourth driving unit 540 and The direction between the second driving unit 520 and the third driving unit 530 is called a diagonal direction.

The second driving unit 520 and the third driving unit 530 disposed in the diagonal direction form a first channel C1, and the first driving unit 510 and the fourth driving unit arranged in another diagonal direction face each other. 540) forms the second channel C2, and the first current applied to the first channel C1 controls the second driver 520 and the third driver 530, and is applied to the second channel C2. The second current to be controlled controls the first driver 510 and the fourth driver 540.

The first current is applied to the coils 522 and 532 of the first channel C1, the magnets 524 and 534 of the first channel C1 have opposite polarities, and the coils of the second channel C2 ( A second current is applied to 512 and 542, and the magnets 514 and 544 of the second channel C2 have opposite polarities. Accordingly, the first driving unit 510 and the fourth driving unit 540 may move in different directions, and the second driving unit 520 and the third driving unit 530 may move in different directions.

According to an embodiment of the present invention, the first distance d1 between the first driving unit 510 and the second driving unit 520 is the second distance d2 between the first driving unit 510 and the third driving unit 530. ), that is, the first channel C1 and the second channel C2 are not orthogonal to each other, and in the case of the actuator 500 arranged asymmetrically, applied to the first channel C1 arranged diagonally. The current value of the first current and the current value of the second current applied to the second channel C2 disposed in another diagonal direction are the first distance d1, the second distance d2, and the lens 2124. It is determined using the tilting direction.

Although the absolute value of the first current and the absolute value of the second current are the same when the lens 2124 moves in the vertical direction, which is the direction of the first distance d1, or the horizontal direction, which is the direction of the second distance d2, the lens ( When 2124) moves diagonally, the absolute value of the first current and the absolute value of the second current are different from each other.

Further, when the first distance d1 in the vertical direction is shorter than the second distance d2 in the left-right direction, the absolute value of the first current when the lens 2124 is tilted to a predetermined value in the left-right direction is the lens 2124 ) Is greater than the absolute value of the first current when tilted to the same predetermined value in the vertical direction, and the absolute value of the second current when the lens 2124 is tilted to the predetermined value in the horizontal direction is the lens 2124 vertically Greater than the absolute value of the second current when tilted to the same predetermined value in the direction.

On the other hand, as described above, the image stabilization may be performed by a method of compensating for a wrong amount of the optical axis of the lens 2124, and for this, optical image stabilization or electrical image stabilization may be performed. As shown in FIG. 14, in the case of an asymmetric actuator, when the first channel C1 and the second channel C2 are not orthogonal to each other, additional vector transformation is required.

Referring to FIG. 15(a), the degree of misalignment of the optical axis can be expressed by the size of an angle in the form of a spherical coordinate, which can be converted into a value of rectangular coordinates as shown in FIG. 15(b). Finally, as shown in FIG. 15(c), the first channel C1 and the second channel C2 are converted into an arrangement form, which can be controlled by the amount of current multiplied by the proportionality constant (a).

More specifically, referring to FIG. 16, the first driving unit 510 and the fourth driving unit 540 are in the diagonal direction, and the second driving unit 520 and the third driving unit 530 are in another diagonal direction, The first channel C1 between the second driver 520 and the third driver 530 is not orthogonal to the second channel C2 between the first driver 510 and the fourth driver 540.

과 2ⅹ2 특성벡터

를 이용하면, 출력벡터

의 각도와 크기를 얻을 수 있으며, 특성벡터

는 하기 수학식 4와 같이 나타낼 수 있다. Where 2ⅹ1 input vector

And 2ⅹ2 characteristic vector

Using, the output vector

The angle and size of can be obtained and the characteristic vector

Can be represented as in Equation 4 below.

Here, a is a value indicating the distance between the first driving unit 510 and the second driving unit 520, and b is a value indicating the distance between the first driving unit 510 and the third driving unit 530. Here, a will be described as an example that is smaller than b.

인 것을 예로 들어 설명하면, 출력벡터

의 각도 및 크기는 하기 수학식 5 내지 6과 같이 나타낼 수 있다.

For example, output vector

The angle and size of can be represented by the following equations 5 to 6.

As a more specific embodiment, referring to Table 2 and FIG. 17, when it is assumed that a=0.5, b=1, and r, the size of the output vector, is 1, if the angle θ of the output vector is 0, The absolute value of the first current applied to the first channel C1 is 1, the absolute value of the second current applied to the second channel C2 is 1, and the second driver 520 of the first channel C1 is ) And the third driving unit 530 have opposite polarities, and the first driving unit 510 and the fourth driving unit 540 of the second channel C2 may have opposite polarities. That is, it can be seen from this that when the lens 2124 moves in the left-right direction, the absolute value of the first current applied to the first channel and the absolute value of the second current applied to the second channel are the same.

Next, when the angle θ of the output vector is π/4, the absolute value of the first current applied to the first channel C1 is 1.05, and the absolute of the second current applied to the second channel C2. The values are different from each other as 0.35, and the second driving unit 520 and the third driving unit 530 of the first channel C1 have opposite polarities, and the first driving unit 510 of the second channel C2 is The fourth driving unit 540 may have opposite polarities. And, when the angle θ of the output vector is 3π/4, the absolute value of the first current applied to the first channel C1 is 0.35, and the absolute value of the second current applied to the second channel C2. Is different from each other as 1.05, and the second driving part 520 and the third driving part 530 of the first channel C1 have opposite polarities, and the first driving part 510 and the second driving part of the second channel C2. 4 The driving unit 540 may have opposite polarities. From this, it can be seen that when the lens 2124 moves diagonally, the absolute value of the first current applied to the first channel and the absolute value of the second current applied to the second channel are different.

Next, when the angle θ of the output vector is π/2, the absolute value of the first current applied to the first channel C1 is 0.5, and the absolute value of the second current applied to the second channel C2. Is 0.5, and the second driving part 520 and the third driving part 530 of the first channel C1 have opposite polarities, and the first driving part 510 and the fourth driving part of the second channel C2 ( 540) may have opposite polarities. That is, it can be seen from this that when the lens 2124 moves in the vertical direction, the absolute value of the first current applied to the first channel and the absolute value of the second current applied to the second channel are the same.

Further, when comparing the case where the angle (θ) of the output vector is 0 and π/2, the absolute value of the first current and the absolute value of the second current when the lens 2124 moves in the left and right directions are respectively lenses. It can be seen that 2124 is greater than the absolute value of the first current and the absolute value of the second current when moving in the vertical direction.

No. Angle (θ) r r/2 C1(*r) C2(*r) C1(*r) C2(*r) One 0 One One 0.5 0.5 2 π/4 1.05 0.35 0.525 0.175 3 π/2 0.5 -0.5 0.25 -0.25 4 3π/4 -0.35 -1.05 -0.175 -0.525 5 π -One -One -0.5 -0.5 6 5π/4 -1.05 -0.35 -0.525 -0.175 7 3π/2 -0.5 0.5 -0.25 0.25 8 7π/4 0.35 1.05 0.175 0.525

From this, the actuator control apparatus according to the embodiment of the present invention can miniaturize the camera and precisely move the lens in all directions on a plane perpendicular to the optical axis.

In this specification, the actuator is mainly described in an embodiment in which the optical path of the lens is changed, but is not limited thereto, and the actuator according to the embodiment of the present invention is arranged to move the image sensor to move the image sensor. Thereby, an autofocusing function or a shake correction function may be performed.

The actuator control apparatus and method according to an embodiment of the present invention can be applied not only to a general RGB camera, but also to an IR camera or a TOF camera for extracting depth information.

On the other hand, in the above, the camera module including the actuator for OIS and the actuator for AF or Zoom is mainly described. In particular, in FIGS. 4A and 4B, the lens assembly of the first actuator 1100 having a zooming function or AF function is guided. The pin type guided by the pin is described as an example, but is not limited thereto. The actuator having the zooming function or AF function may be a ball type guided by a ball.

18 is a perspective view of an actuator for AF or Zoom according to another embodiment of the present invention, FIG. 19 is a perspective view in which some components are omitted in the actuator according to the embodiment shown in FIG. 18, and FIG. 20 is shown in FIG. 18 It is an exploded perspective view in which some components are omitted in the actuator according to the embodiment.

Referring to FIG. 18, the actuator 2100 according to an embodiment includes a base 2020, a circuit board 2040 disposed outside the base 2020, a driving unit 2142, and a third lens assembly 2130. can do.

19 is a perspective view in which the base 2020 and the circuit board 2040 are omitted in FIG. 18, and referring to FIG. 19, the actuator 2100 according to the embodiment includes a first guide part 2210 and a second guide part ( 2220 ), a first lens assembly 2110, a second lens assembly 2120, a driving unit 2141, and a driving unit 2142.

The driving unit 2141 and the driving unit 2142 may include coils or magnets.

For example, when the driving unit 2141 and the driving unit 2142 include a coil, the driving unit 2141 may include a first coil unit 2141b and a first yoke 2141a, and the driving unit 2142 may The second coil part 2142b and the second yoke 2142a may be included.

Alternatively, on the contrary, the driving unit 2141 and the driving unit 2142 may include a magnet.

In the xyz axis direction shown in FIG. 20, the z-axis means an optical axis direction or a parallel direction thereof, the xz plane represents the ground, and the x-axis represents a direction perpendicular to the z-axis in the ground (xz plane), , y-axis may mean a direction perpendicular to the ground.

Referring to FIG. 20, the actuator 2100 according to the embodiment includes a base 2020, a first guide portion 2210, a second guide portion 2220, a first lens assembly 2110, and a second lens assembly 2120 ), and a third lens assembly 2130.

For example, the actuator 2100 according to the embodiment includes a base 2020, a first guide portion 2210 disposed on one side of the base 2020, and a second guide portion disposed on the other side of the base 2020. 2220, a first lens assembly 2110 corresponding to the first guide part 2210, a second lens assembly 2120 corresponding to the second guide part 2220, and a first guide part 2210 And a first ball 2117 disposed between the first lens assembly 2110 (see FIG. 21A) and a second ball disposed between the second guide portion 2220 and the second lens assembly 2120 (not shown) It may include.

Also, the embodiment may include a third lens assembly 2130 disposed in front of the first lens assembly 2110 in the optical axis direction.

19 and 20, an embodiment includes a first guide portion 2210 disposed adjacent to a first side wall of the base 2020 and a second guide disposed adjacent to a second side wall of the base 2020. A portion 2220 may be included.

The first guide part 2210 may be disposed between the first lens assembly 2110 and the first sidewall of the base 2020.

The second guide part 2220 may be disposed between the second lens assembly 2120 and the second side wall of the base 2020. The first sidewall and the second sidewall of the base 2020 may be disposed to face each other.

According to an embodiment, as the lens assembly is driven while the first guide portion 2210 and the second guide portion 2220, which are precisely numerically controlled in the base 2020, are coupled, reduce frictional torque to reduce frictional resistance. By doing so, there are technical effects such as improvement in driving force during reduction, reduction in power consumption, and improvement in control characteristics.

Accordingly, according to the embodiment, while zooming (zooming), while minimizing the friction torque while preventing the decenter (decent) of the lens, or the lens tilt (tilt), the center axis of the lens group and the image sensor is not aligned to prevent the occurrence of image quality However, there is a complex technical effect that can significantly improve the resolution.

Particularly, according to the present embodiment, the injection direction is adopted by not separately arranging the guide rail on the base itself, and separately adopting the first guide part 2210 and the second guide part 2220 which are formed and assembled separately from the base 2020. There is a special technical effect that can prevent the occurrence of a gradient.

In the embodiment, the first guide portion 2210 and the second guide portion 2220 may be shorter than the base 2020 by being injected through the X-axis, and in this case, the first guide portion 2210 and the second guide portion When the rail is disposed at (2220), it is possible to minimize the occurrence of a gradient during injection, and there is a technical effect that the possibility that the straight line of the rail is twisted is low.

More specifically, FIG. 21A is a perspective view of the first lens assembly 2110 in the actuator according to the embodiment shown in FIG. 20, and FIG. 21B is partially removed from the first lens assembly 2110 shown in FIG. 21A It is a perspective view.

Referring briefly to FIG. 20, the embodiment includes a first lens assembly 2110 moving along the first guide portion 2210 and a second lens assembly 2120 moving along the second guide portion 2220. can do.

Referring back to FIG. 21A, the first lens assembly 2110 may include a first lens barrel 2112a in which the first lens 2113 is disposed and a first drive unit housing 2112b in which the driving unit 2116 is disposed. have. The first lens barrel 2112a and the first driving unit housing 2112b may be a first housing, and the first housing may be a barrel or barrel shape. The driving unit 2116 may be a magnet driving unit, but is not limited thereto, and in some cases, a coil may be disposed.

In addition, the second lens assembly 2120 may include a second lens barrel (not shown) in which a second lens (not shown) is disposed, and a second driver housing (not shown) in which a driving unit (not shown) is disposed. The second lens barrel (not shown) and the second driving unit housing (not shown) may be a second housing, and the second housing may be a barrel or a barrel shape. The driving unit may be a magnet driving unit, but is not limited thereto, and a coil may be arranged in some cases.

The driving unit 2116 may correspond to the two first rails 2212.

Embodiments can be driven using a single or multiple balls. For example, the embodiment may be disposed between the first ball 2117 and the second guide portion 2220 and the second lens assembly 2120 disposed between the first guide portion 2210 and the first lens assembly 2110. It may include a second ball (not shown) disposed.

For example, in the embodiment, the first ball 2117 is disposed on the upper side of the first driving unit housing 2112b, or a single or a plurality of first-first balls 2117a and the lower side of the first driving unit housing 2112b. It may include a single or a plurality of 1-2 ball (2117b).

In the embodiment, the first-first ball 2117a among the first balls 2117 moves along the first-first rail 2212a, which is one of the first rails 2212, and is the first of the first balls 2117. The -2 ball 2117b may move along the 1-2 rail 2212b, which is another one of the first rail 2212.

According to an embodiment, the first guide assembly includes the first-first rail and the first-second rail, so that the first-first rail and the first-second rail guide the first lens assembly 2110 so that the first lens assembly When the 2110 is moved, there is a technical effect to increase the accuracy of the second lens assembly 2110 and the optical axis alignment.

Referring to FIG. 21B, in an embodiment, the first lens assembly 2110 may include a first assembly groove 2112b1 in which the first ball 2117 is disposed. The second lens assembly 2120 may include a second assembly groove (not shown) in which the second ball is disposed.

A plurality of first assembly grooves 2112b1 of the first lens assembly 2110 may be provided. At this time, a distance between two first assembly grooves 2112b1 among the plurality of first assembly grooves 2112b1 based on the optical axis direction may be longer than the thickness of the first lens barrel 2112a.

In an embodiment, the first assembly groove 2112b1 of the first lens assembly 2110 may be V-shaped. Also, the second assembly groove (not shown) of the second lens assembly 2120 may have a V shape. The first assembly groove 2112b1 of the first lens assembly 2110 may have a U shape or a shape in contact with the first ball 2117 at two or three points in addition to the V shape. The second assembly groove (not shown) of the second lens assembly 2120 may have a U-shape or a shape in contact with the second ball at two or three points in addition to the V-shape.

20 and 21A, in an embodiment, the first guide portion 2210, the first ball 2117, and the first assembly groove 2112b1 are disposed on an imaginary straight line from the first side wall to the second side wall. Can be. The first guide portion 2210, the first ball 2117, and the first assembly groove 2112b1 may be disposed between the first sidewall and the second sidewall.

Next, FIG. 22 is a perspective view of the third lens assembly 2130 in the actuator according to the embodiment shown in FIG. 20.

Referring to FIG. 22, in an embodiment, the third lens assembly 2130 may include a third housing 2021, a third barrel 2131, and a third lens 2133.

In an embodiment, the third lens assembly 2130 is provided with a barrel recess 2021r on the top of the third barrel 2131 to uniformly match the thickness of the third barrel 2131 of the third lens assembly 2130. In addition, there is a complex technical effect that can increase the accuracy of numerical management by reducing the amount of injection.

Also, according to an embodiment, the third lens assembly 2130 may include a housing rib 2021a and a housing recess 2021b in the third housing 2021.

In an embodiment, the third lens assembly 2130 is provided with a housing recess 2021b in the third housing 2021 to reduce the amount of injection material, thereby increasing the accuracy of numerical management and at the same time, housing ribs in the third housing 2021 ( 2021a), there is a complex technical effect that can secure the strength.

The embodiments have been mainly described above, but this is merely an example, and is not intended to limit the present invention. Those of ordinary skill in the art to which the present invention pertains are not exemplified above, without departing from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be implemented by modification. And differences related to these modifications and applications should be construed as being included in the scope of the invention defined in the appended claims.

Claims (17)

An actuator that changes the optical path of the lens; And
It includes a control unit for controlling the actuator,
The actuator includes a first driving part and a second driving part arranged on a first side of the lens support member, and a third driving part and a fourth driving part arranged on the second side of the lens support member,
The first distance between the first driving part and the second driving part is different from the second distance between the first driving part and the third driving part,
The first driving part and the fourth driving part are positioned diagonally to each other,
The control unit applies a first current to the second driving unit and the third driving unit,
The control unit applies a second current to the first driver and the fourth driver,
An actuator control device having different absolute values of the first current and absolute values of the second current when the lens moves in a diagonal direction. An actuator that changes the optical path of the lens; And
It includes a control unit for controlling the actuator,
The actuator includes a first driving part and a second driving part arranged on a first side of the lens support member, and a third driving part and a fourth driving part arranged on the second side of the lens support member,
The first distance between the first driving part and the second driving part is different from the second distance between the first driving part and the third driving part,
The control unit applies a first current to the second driving unit and the third driving unit,
The control unit applies a second current to the first driver and the fourth driver,
The current control value of the first current and the current value of the second current are determined using at least one of the first distance, the second distance, and the tilting direction of the lens. According to claim 2,
The first driving part and the fourth driving part are positioned diagonally to each other,
An actuator control device having different absolute values of the first current and absolute values of the second current when the lens moves in a diagonal direction. The method of claim 1 or 3,
The actuator control device having the same absolute value of the first current and the absolute value of the second current when the lens moves in the vertical direction, which is the direction of the first distance, or the horizontal direction, which is the direction of the second distance. The method according to claim 1 or 2,
An actuator control device in which the current value of the first current and the current value of the second current vary depending on the tilting direction of the lens. The method according to claim 1 or 2,
The distance between the third driving part and the fourth driving part is the first distance,
The distance between the second driving part and the fourth driving part is the second distance, the actuator control device. The method according to claim 1 or 2,
The first distance is shorter than the second actuator actuator control device. The method according to claim 1 or 2,
The first driving part and the fourth driving part are actuator control devices moving in different directions. According to claim 4,
The absolute control value of the first current when the lens is tilted in the left-right direction is greater than the absolute value of the first current when the lens is tilted in the vertical direction. According to claim 1,
The actuator is an actuator for correcting the shaking of the lens,
The control unit is an actuator control device that generates a signal for operating the actuator using the value detected by the gyro sensor. According to claim 1,
The actuator is an actuator control device that is an actuator for adjusting the focal length of the lens. The method according to claim 1 or 2,
The lens support member is an actuator control device that is a shaper member that reversibly deforms the shape of the lens by pressing the lens. The method according to claim 1 or 2,
The lens support member accommodates the lens and is an actuator control device that is a lens barrel that moves together with the lens. Detecting the tilting direction of the lens,
Generating a signal for controlling the movement of the lens according to the tilting direction of the lens,
Compensating the tilting direction of the lens according to the control signal,
The step of correcting the tilting direction determines a current value of a current applied to the driving units based on a distance between driving units moving the lens, a position of driving units moving the lens, and a sensed tilting direction of the lens,
A camera shake correction method in which the current value of the applied current differs depending on the tilting direction of the corrected lens. The method of claim 14,
When the tilting direction of the corrected lens is a vertical direction or a horizontal direction, the absolute value of the current applied to the driving units is the same,
The absolute value of the current applied to the driving units when the tilting direction of the corrected lens is the vertical direction is smaller than the absolute value of the current applied to the driving units when the tilting direction of the corrected lens is the left-right direction,
When the tilting direction of the lens to be corrected is a diagonal direction, the absolute value of the current applied to some of the driving parts is different from the absolute value of the current applied to the other part and the camera shake correction method of the camera. The method of claim 14,
The step of generating a signal for controlling the operation of the lens to correct the shaking of the lens,
Generating a first control value for controlling the operation of the lens according to the degree of distortion of the optical axis of the lens, And
Generating a second control value correcting the first control value using a distance and a position between driving units moving the lens
Camera shake correction method comprising a. The method of claim 14,
The driving parts include a first driving part and a second driving part arranged on the first side of the lens support member, and a third driving part and a fourth driving part arranged on the second side of the lens support member,
The first distance between the first driving part and the second driving part is different from the second distance between the first driving part and the third driving part,
The first driving part and the fourth driving part are positioned diagonally to each other,
A first current is applied to the second driver and the third driver,
A second current is applied to the first driver and the fourth driver,
A camera shake correction method in which the absolute value of the first current and the absolute value of the second current are different when the lens moves in a diagonal direction.

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