KR101640565B1 - Camera module with optical image stabilization function - Google Patents

Camera module with optical image stabilization function Download PDF

Info

Publication number
KR101640565B1
KR101640565B1 KR1020150113955A KR20150113955A KR101640565B1 KR 101640565 B1 KR101640565 B1 KR 101640565B1 KR 1020150113955 A KR1020150113955 A KR 1020150113955A KR 20150113955 A KR20150113955 A KR 20150113955A KR 101640565 B1 KR101640565 B1 KR 101640565B1
Authority
KR
South Korea
Prior art keywords
guide
carrier
guide grooves
base
magnets
Prior art date
Application number
KR1020150113955A
Other languages
Korean (ko)
Inventor
임장호
최성욱
정준용
김재훈
오인규
강한울
Original Assignee
주식회사 엠씨넥스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 엠씨넥스 filed Critical 주식회사 엠씨넥스
Priority to KR1020150113955A priority Critical patent/KR101640565B1/en
Application granted granted Critical
Publication of KR101640565B1 publication Critical patent/KR101640565B1/en

Links

Images

Classifications

    • H04N5/2328—
    • H04N5/225—
    • H04N5/23251—
    • H04N5/23264—

Abstract

The present invention relates to a camera module which can implement its small size and light weight while providing an optical image stabilization function. A lower carrier is disposed on a base. An upper carrier is disposed on the lower carrier. An X-axis guide includes first guide balls which are arranged on the base, and first guide grooves which are formed on each of a top surface of the base and a bottom surface of the lower carrier so that the first guide balls are guided through horizontal movement in an X-axis direction. A Y-axis guide includes second guide balls which are arranged on the lower carrier, and second guide grooves which are formed on each of a top surface of the lower carrier and a bottom surface of the upper carrier so that the second guide balls are guided through horizontal movement in a Y-axis direction. A drive unit includes magnets which are fixed on the upper carrier, horizontal drive coils which are fixed on the base and horizontally move the lower carrier and the upper carrier through interaction with the magnets based on application of drive voltage, and yokes which are fixed on the based and receive force of attraction from the respective magnets. A lens unit is disposed through centers of the upper and lower carriers, and is supported by elastic force of upper and lower springs with respect to the upper carrier. A vertical drive coil is fixed on the lens unit and generates vertical driving force in a Z-axis direction through interaction with the magnets based on application of drive voltage.

Description

[0001] The present invention relates to a camera module having an image stabilization function,

The present invention relates to a camera module having a camera-shake correction function.

With the development of compact and lightweight technology for digital cameras, camera modules have been installed in mobile communication terminals such as smart phones. In recent years, the camera module has been increasingly employed as an image stabilizer in order to prevent degradation of resolution of a photographed image due to external vibration or user's hand shake as well as an auto focus function. As an example, an apparatus for performing an image stabilization function is an optical image stabilizer.

The optical image stabilizer corrects the image of the subject image formed on the image sensor so that the image of the subject is not shaken even if the camera module is shaken by detecting the camera shake of the user and changing the position of the optical lens or the image sensor.

On the other hand, the optical image stabilizer includes a driving mechanism for changing the position of the optical lens or the image sensor. As a result, when the camera module is incorporated in a mobile communication terminal or the like, the optical image stabilization device requires more space for mounting. Generally, mobile communication terminals are limited in space. Therefore, the optical image stabilization device of the camera module is required to be configured so as to realize miniaturization and lightweight in order to be easily adopted in a mobile communication terminal.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a camera module capable of realizing a reduction in size and weight while having a camera shake correction function.

According to an aspect of the present invention, a camera module having an image stabilization function includes a base, a lower carrier, an upper carrier, an X-axis guide, a Y-axis guide, a drive unit, For example. The lower carrier is disposed on the base. The upper carrier is disposed on the lower carrier. The X-axis guide includes first guide balls arranged on the base, and first guide grooves respectively formed on the upper surface of the base and the lower surface of the lower guide to guide the horizontal movement of the first guide balls along the X-axis direction. The Y-axis guide includes second guide balls arranged on the lower carrier, and second guide grooves formed on the upper surface of the lower carrier and the lower surface of the upper carrier, respectively, so as to guide the horizontal movement of the second guide balls along the Y- . The driving unit includes magnets fixed to the upper carrier, horizontal driving coils fixed to the base and horizontally moving the lower carrier and the upper carrier by interacting with the magnets according to application of a driving voltage, Lt; RTI ID = 0.0 > yokes < / RTI > The lens unit is arranged to pass through the center of each of the upper and lower carriers, and is supported by the upper and lower springs by elastic force against the upper carrier. The vertical driving coil is fixed to the lens unit and interacts with the magnets according to application of the driving voltage to generate a vertical driving force in the Z axis direction.

According to the present invention, it is possible to realize the miniaturization and weight reduction of the camera module while the camera shake correction function is provided. According to the present invention, the vertical driving coil mounted on the lens unit can stably receive the driving voltage from the printed circuit board on which the image sensor is mounted. According to the present invention, the lens unit can be horizontally driven while being structurally and stably supported at the time of camera-shake correction. According to the present invention, it may be advantageous to reduce the power consumption of the camera module.

1 is a perspective view of a camera module according to an embodiment of the present invention.
2 is a cross-sectional view taken along the line AA in Fig.
Fig. 3 is a perspective view of Fig. 1 with the cover removed. Fig.
FIG. 4 is an exploded perspective view of FIG. 3. FIG.
5 is an exploded perspective view for explaining the process of connecting the vertical driving coil to the contact pad of the base in FIG.
Fig. 6 is a perspective view showing a state in which the contact terminal is impregnated into the conductive grease on the contact pad in Fig. 5;
7 is a side cross-sectional view of Fig.
FIG. 8 is a plan view of FIG. 3; FIG.
9 is a bottom view of the connecting board.
10 is an exploded perspective view showing an X-axis guide between a base and a lower carrier;
11 is an exploded perspective view showing the Y-axis guide between the lower carrier and the upper carrier.
12 is a sectional view showing an example in which the first guide ball is accommodated in the first upper and lower guide grooves.
13 is a sectional view showing an example in which the second guide ball is accommodated in the second upper and lower guide grooves.
14 is a sectional view showing an example in which the first guide ball is accommodated in the first upper and lower guide grooves according to another example.
15 is a sectional view showing an example in which the second guide ball is accommodated in the second upper and lower guide grooves according to another example.
16 is a bottom view showing a state in which the yokes correspond to the magnets according to another example.
17 is a side view of Fig. 16. Fig.
Fig. 18 is a diagram for explaining an example of the action of the yoke in Fig.

The present invention will now be described in detail with reference to the accompanying drawings. Here, the same reference numerals are used for the same components, and a detailed description of known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

1 is a perspective view of a camera module according to an embodiment of the present invention. 2 is a cross-sectional view taken along the line A-A in Fig. Fig. 3 is a perspective view of Fig. 1 with the cover removed. Fig. FIG. 4 is an exploded perspective view of FIG. 3. FIG.

1 to 4, the camera module 100 includes a base 110, a lower carrier 120, an upper carrier 130, an X-axis guide 140, a Y-axis guide 150, A drive unit 160, a lens unit 170, and a vertical drive coil 180.

The base 110 may have a tetragonal perimeter. The base 110 may have an opening formed at the center thereof. When the lens unit 170 is disposed on the upper side of the base 110, the lower portion of the lens unit 170 is exposed through the central opening. When the image sensor 190 is disposed on the lower side of the base 110, light passing through the lens 171 of the lens unit 170 is transmitted to the image sensor 190 through the central opening of the base 110 .

The lower carrier 120 is disposed on the base 110. The lower carrier 120 may have a rectangular perimeter. The lower carrier 120 is disposed on the base 110 with the circumferential surfaces thereof aligned with the circumferential surfaces of the base 110, respectively. The lower carrier 120 may have a central hole penetrating up and down. The center hole of the lower carrier 120 is connected to the central opening of the base 110.

The upper carrier 130 is disposed on the lower carrier 120. The upper carrier 130 may have a rectangular perimeter. The upper carrier 130 is disposed on the lower carrier 120 with circumferential surfaces side by side with the circumferential surfaces of the lower carrier 120, respectively. The upper carrier 130 may have a central hole penetrating vertically. The central hole of the upper carrier (130) communicates with the central hole of the lower carrier (120). The upper carrier 130 can support the lens unit 170 while accommodating the lens unit 170 in the center hole.

The X-axis guide 140 guides the horizontal movement of the lower carrier 120 along the X-axis direction. When the perimeter of the lower carrier 120 is rectangular, the lower carrier 120 can be guided by the X-axis guide 140 with two sides facing each other aligned with the X-axis direction.

The Y-axis guide 150 guides the horizontal movement of the upper carrier 130 along the Y-axis direction. When the periphery of the upper carrier 130 is a quadrangle, the upper carrier 130 can be guided by the Y-axis guide 150 with two sides facing each other positioned in parallel with the Y-axis direction. Here, for convenience of explanation, one axis on the horizontal plane is referred to as the X axis, and the other axis orthogonal to the Y axis is referred to as the Y axis.

The upper carrier 130 is guided by the Y-axis guide 150 and moves in the Y-axis direction. When the lower carrier 120 is guided by the X-axis guide 140 and moves in the X-axis direction, the upper carrier 130 moves in the X-axis direction together with the lower carrier 120. Thus, the upper carrier 130 can move in the X and Y axes, thereby moving the lens unit 170 in the X and Y axes. Accordingly, the position of the lens unit 170 relative to the image sensor 180 can be changed so as to correct the shaking motion.

Referring to FIG. 10, the X-axis guide 140 includes first guide balls 141a, 141b and 141c and first guide grooves 142a, 142b, 142c, 143a, 143b and 143c.

The first guide grooves 142a, 142b, 142c, 143a, 143b, and 143c include first lower guide grooves 142a, 142b, and 142c and first upper guide grooves 143a, 143b, and 143c. The first lower guide grooves 142a, 142b and 142c are formed on the upper surface of the base 110 to guide the horizontal movement of the first guide balls 141a, 141b and 141c along the X axis direction. The first upper guide grooves 143a, 143b and 143c are formed on the lower surface of the lower carrier 120 to guide the horizontal movement of the first guide balls 141a, 141b and 141c along the X axis direction.

11, the Y-axis guide 150 includes second guide balls 151a, 151b, and 151c and second guide grooves 152a, 152b, 152c, 153a, 153b, and 153c. The second lower guide grooves 152a, 152b and 152c are formed on the upper surface of the lower carrier 120 to guide the horizontal movement of the second guide balls 151a, 151b and 151c along the Y axis direction. The second upper guide grooves 153a, 153b and 153c are formed on the lower surface of the upper carrier 130 to guide the horizontal movement of the second guide balls 151a, 151b and 151c along the Y axis direction. The first guide balls 141a, 141b, and 141c and the second guide balls 151a, 151b, and 151c are illustrated as being three, respectively, but may be two or four or more.

1 to 4, the driving unit 160 includes magnets 161a and 161b, horizontal driving coils 162a and 162b, and yokes 163a and 163b. The magnets 161a and 161b are fixed to the upper carrier 130. The horizontal driving coils 162a and 162b are fixed to the base 110. [ The horizontal driving coils 162a and 162b interact with the magnets 161a and 161b in accordance with application of driving voltage to move the lower carrier 120 and the upper carrier 130 horizontally. The yokes 163a and 163b are fixed to the base 110 and receive attraction force from the magnets 161a and 161b, respectively. The attraction force between the yokes 163a and 163b and the magnets 161a and 161b acts as a force for returning the magnets 161a and 161b to their original positions.

The lens unit 170 is arranged to pass through the center of each of the upper and lower carriers 130 and 120. The lens unit 170 is supported by the lower spring 131 and the upper spring 136 with an elastic force against the upper carrier 130. When a vertical driving force is applied to the lens unit 170 in the optical axis direction, the upper and lower springs 136 and 131 are elastically deformed. When the vertical driving force applied to the lens unit 170 is released, the upper and lower springs 136 and 131 are elastically restored to return the lens unit 170 to its original position. Further, the lens unit 170 can move horizontally with the upper carrier 130 as the upper carrier 130 moves horizontally. The upper and lower springs 136 and 131 may be formed in the form of leaf springs.

The lower spring 131 includes an outer elastic part 131a fixed to the lower side of the upper carrier 130 and an inner elastic part 131b fixed to the lower side of the lens unit 170 from the inside of the outer elastic part 131a, And a plurality of intermediate elastic portions 131c connecting the outer elastic portion 131a and the inner elastic portion 131b between the outer elastic portion 131a and the inner elastic portion 131b. The upper spring 136 includes an outer elastic portion 136a fixed on the upper side of the upper carrier 130 and an inner elastic portion 136b fixed on the upper side of the lens unit 170 on the inner side of the outer elastic portion 136a, And a plurality of intermediate elastic portions 136c connecting the outer elastic portion 136a and the inner elastic portion 136b between the outer elastic portion 136a and the inner elastic portion 136b. The shapes of the upper and lower springs 136 and 131 are not limited to those shown in the drawings, but may be variously formed.

The lens unit 170 may include at least one lens 171 and a lens barrel 172. The lens 171 forms an optical image of the subject. The lens barrel 172 mounts the lens 171. The upper portion of the lens barrel 172 is opened to allow light to enter the lens 171. The lower portion of the lens barrel 172 is opened so that light having passed through the lens 171 can be transmitted to the image sensor 190 provided below the lens 171.

The image sensor 190 is disposed on the lower side of the lens unit 170 in correspondence with the center hole of the base 110. The image sensor 190 converts an optical image formed by the lens 171 into an electrical signal, and may be constituted by a CCD, a CMOS, or the like. The image sensor 190 may be mounted on a printed circuit board 196. The printed circuit board 196 may be fixed to the lower side of the base 110.

The vertical driving coil 180 is fixed to the lens unit 170. The vertical driving coil 180 can be wound on the bobbin. The bobbin on which the vertical driving coil 180 is wound can be fixed around the lens barrel 172. The vertical driving coils 180 interact with the magnets 161a and 161b according to application of a driving voltage to generate a vertical driving force in the Z axis direction.

When the vertical driving coil 180 is placed in the magnetic field of the magnets 161a and 161b and receives the driving voltage, the vertical driving coil 180 moves in the Z axis direction, that is, the optical axis direction by the Lorentz force. As the vertical driving coil 180 moves in the optical axis direction, the lens barrel 172 also moves in the optical axis direction. Thus, the position of the lens 171 supported on the lens barrel 172 can be varied with respect to the image sensor 190, so that the focus can be automatically adjusted. As described above, since the lens 171 is moved in the optical axis direction by using the magnets 161a and 161b of the drive unit 160 for camera-shake correction, the camera module 100 can be advantageously reduced in size and weight.

On the other hand, the vertical driving coil 180 can receive a driving voltage from the printed circuit board 196. 5 to 7, the vertical driving coil 180 may be electrically connected to the printed circuit board 196 via the lower spring 131 and the base 110. The control unit may apply a driving voltage to the vertical driving coil 180 through the printed circuit board 196. [

The lower spring 131 has conductivity. The lower spring 131 may be made of a conductive metal. The lower spring 131 may be divided into two parts. The divided portions of the lower spring 131 may be symmetrically formed in the same shape.

The divided portions of the lower spring 131 are electrically connected to the wiring terminals 181 of the vertical driving coil 180, respectively. The divided portions of the lower spring 131 may be respectively coupled to the wiring terminals 181 of the vertical driving coil 180 by soldering or the like. The divided portions of the lower spring 131 each include a contact terminal 132. [

The base 110 is formed on its upper surface with contact pads 117 which are in contact with the contact terminals 132, respectively. The contact pads 117 are electrically connected to the printed circuit board 196. For example, the base 110 may have a shape in which the connection board 116 is mounted on the base block 111. First lower guide grooves 142a, 142b and 142c may be formed on the upper surface of the base block 111. [ The base block 111 supports the connecting board 116.

The connection board 116 is circuitly connected to the printed circuit board 196. Contact pads 117 may be formed on the upper surface of the connecting board 116. [ The contact pads 117 may be electrically connected to the printed circuit board 196 by being connected to the circuit pattern of the connection board 116. [ Further, the connecting board 116 may be provided with horizontal driving coils 162a and 162b. The horizontal driving coils 162a and 162b may be connected to the circuit pattern of the connecting board 116 to receive a driving voltage from the printed circuit board 196. [

The contact terminals 132 are held in a conductive state by the conductive grease 118 applied to the contact pads 117. The conductive grease 118 exhibits a liquid state during movement, and has a characteristic of becoming semi-solid due to loss of fluidity when stopped. The conductive grease 118 may contain conductive material such as silver, gold, copper, and aluminum in the form of particles in the grease material to have conductivity.

The conductive grease 118 acts as follows. The contact terminals 132 of the lower spring 131 fixed to the upper carrier 130 are moved in the X and Y directions relative to the connecting substrate 116 Axis, and Y-axis. At this time, since the conductive grease 118 exhibits fluidity, the contact terminal 132 can move in the X axis and the Y axis while being partially impregnated with the conductive grease 118. Therefore, the contact terminal 132 can be kept energized with the contact pad 117. Therefore, the vertical driving coil 180 can stably receive the driving voltage from the printed circuit board 196. [ The application area of the conductive grease 118 may be set larger than the movable area of each contact terminal 132. [

Each of the contact pads 117 can be exposed through the connection groove 117a formed on the upper surface of the connection substrate 116. [ With the conductive grease 118 applied to the upper surface of the contact pad 117, the connection groove 117a can receive the conductive grease 118. [ Therefore, the conductive grease 118 can be kept applied to the upper surface of the contact pad 117 without flowing to the periphery of the contact pad 117 by the connection groove 117a.

The contact terminals 132 are elastically deformed to contact the contact pads 117. [ Therefore, the contact terminals 132 can be kept in constant contact with the contact pads 117 by the restoring force. The contact terminal 132 can be kept in contact with the contact pad 117 even if the contact terminal 132 moves in the X and Y axes with respect to the contact pad 117. [ The contact terminal 132 may extend downward from the lower spring 131 and then be bent upward. The contact terminal may have a hole 132a. The conductive grease 118 may be impregnated with the conductive grease 118 while the contact terminal 132 is applied to the upper surface of the contact pad 117. [ At this time, since the hole 132a of the contact terminal 132 receives the conductive grease 118, the area of the contact terminal 132 impregnated into the conductive grease 118 can be increased.

As another example, although not shown, the contact terminals 132 of the lower spring 131 can be soldered to the contact pads 117 of the connection board 116. [ In this case, the lower spring 131 may be formed so that it is not damaged even when the contact terminals 132 move in the X and Y axes.

Meanwhile, for example, the driving unit 160 may generate a first horizontal driving force in a first diagonal direction D1 inclined with respect to the X axis and the Y axis, and may generate a second horizontal driving force in a second diagonal direction D1 orthogonal to the first diagonal direction D1. It is possible to generate the second horizontal driving force in the diagonal direction D2. Here, the driving unit 160 simultaneously generates the first and second horizontal driving forces.

The first diagonal direction D1 can be set to be inclined at 45 degrees with respect to the X axis and Y axis respectively on the X-Y axis plane. Accordingly, the second diagonal direction D2 can also be set to be inclined at 45 degrees with respect to the X and Y axes on the X-Y axis plane, respectively. When the first and second diagonal directions D1 and D2 are inclined at 45 degrees with respect to the X and Y axes, the driving unit 160 generates the first and second horizontal driving forces with the same magnitude.

The magnets 161a and 161b may be formed of a pair of first magnets 161a and a pair of second magnets 161b. The first magnets 161a are fixed to the upper carrier 130 by being spaced apart from each other in the first diagonal direction D1. Each of the first magnets 161a is arranged with the N pole and the S pole along the first diagonal direction D1. The first magnets 161a may be arranged to face the same pole or face each other in the center hole of the upper carrier 130. [

And the second magnets 161b are fixed to the upper carrier 130 by being spaced apart from each other in the second diagonal direction D2. Each of the second magnets 161b is disposed along the second diagonal direction D2 with the N pole and the S pole. The second magnets 161b may be arranged to face the same pole or face each other in the center hole of the upper carrier 130. The second magnets 161b may have the same shape as the first magnets 161a. The shapes of the first and second magnets 161a and 161b are not limited to those shown in the drawings, but may be various shapes. The first and second magnets 161a and 161b may be fixed to the upper carrier 130 via a magnet yoke 164. The magnet yoke 164 may be made of a magnetic material. The magnet yoke 164 may be fixed to the upper ends of the first and second magnets 161a and 161b.

The horizontal driving coils 162a and 162b may include a pair of first horizontal driving coils 162a and a pair of second horizontal driving coils 162b. The first horizontal driving coils 162a are fixed to the base 110. [ The first horizontal driving coils 162a may be included in the connection board 116 and fixed to the base 110. [ The first horizontal driving coils 162a may be formed on the connecting board 116 in a concentrically wound pattern.

The first horizontal driving coils 162a are disposed so as to correspond to the first magnets 161a. The first horizontal driving coils 162a interact with the first magnets 161a according to application of a driving voltage to generate a first horizontal driving force.

The first horizontal driving force corresponds to the Lorentz force generated between the first horizontal driving coil 162a and the first magnet 161a. The direction and magnitude of the first horizontal driving force applied to the first magnet 161a are set according to the current direction and magnitude of the driving voltage applied to the first horizontal driving coil 162a. The direction of the first horizontal driving force by any one of the first horizontal driving coils 162a and the corresponding first magnet 161a is different from that of the other one of the first horizontal driving coils 162a and the corresponding one of the first horizontal driving coils 162a, 1 magnet 161a in the direction of the first horizontal driving force.

And the second horizontal driving coils 162b are fixed to the base 110. [ The second horizontal driving coils 162b may be included in the connecting board 116 and fixed to the base 110. [ And the second horizontal driving coils 162b may be formed on the connecting board 116 in a concentrically wound pattern. And the second horizontal driving coils 162b are disposed so as to correspond to the second magnets 161b. The second horizontal driving coils 162b interact with the second magnets 161b to generate a second horizontal driving force according to application of the driving voltage.

And the second horizontal driving force corresponds to the Lorentz force generated between the second horizontal driving coil 162b and the second magnet 161b. Here, the direction and magnitude of the second horizontal driving force applied to the second magnet 161b are set according to the current direction and magnitude of the driving voltage applied to the second horizontal driving coil 162b. The direction of the second horizontal driving force by any one of the second horizontal driving coils 162b and the corresponding second magnet 161b is different from that of the other one of the second horizontal driving coils 162b, 2 magnet 161b in the direction of the second horizontal driving force.

The first and second horizontal driving coils 162a and 162b are controlled so that a driving voltage is simultaneously applied. The first horizontal driving coils 162a may be connected in series with each other, and the second horizontal driving coils 162b may be connected in series with each other. The first horizontal driving coil 162a and the second horizontal driving coil 162b may be connected in parallel.

The first and second horizontal driving coils 162a and 162b may be connected in parallel to each other. The first and second horizontal driving coils 162a and 162b may be connected in parallel to each other. Can all be connected in parallel. The first and second horizontal driving coils 162a and 162b may be electrically connected to the printed circuit board 196.

A control unit (not shown) for controlling the camera module 100 may apply a driving voltage to the first and second horizontal driving coils 162a and 162b. The control unit may calculate the driving voltages applied to the first and second horizontal driving coils 162a and 162b according to the target position of the lens unit 170 by using an equation or a lookup table to control the first and second horizontal driving forces have.

The yokes 163a and 163b may be composed of a pair of first yokes 163a and a pair of second yokes 163b. The first yokes 163a are fixed to the base 110 and receive attraction force from the first magnets 161a. The first yokes 163a are fixed to the lower surface of the connecting board 116 and can be covered by the base block 111. [ The attractive force between the first yoke 163a and the first magnet 161a acts as a force for returning the first magnet 161a to its original position. Accordingly, when the first and second magnets 161a and 161b are applied with the first and second horizontal driving forces, the first magnet 161a can move stably by being attracted by the first yoke 163a. In addition, when the first and second magnets 161a and 161b are released from the first and second horizontal driving forces, the first magnet 161a can return to its original position by attraction with the first yoke 163a. The first yokes 163a may be disposed to face the lower ends of the first magnets 161a.

The second yokes 163b are fixed to the base 110 and receive attraction force from the second magnets 161b. The second yokes 163b are fixed to the lower surface of the connecting board 116 and can be covered by the base block 111. [ The attractive force between the second yoke 163b and the second magnet 161b acts as a force to return the second magnet 161b to its original position. The second yoke 163b functions in the same manner as the first yoke 163a. And the second yokes 163b may be disposed to face the lower ends of the second magnets 161b. The first and second yokes 163a and 163b are made of a magnetic material.

The driving unit 160 allows the lens unit 170 to move to the target position along the X-axis guide 140 and the Y-axis guide 150 by the first and second horizontal driving forces. 8, the first horizontal driving force is indicated by F1 and F2 in accordance with the driving direction, and the second horizontal driving force is indicated by F3 and F4 in accordance with the driving direction. Then, F1 to F4 are set to have the same size. In this case, the drive unit 160 can operate as follows.

When the driving unit 160 generates the first horizontal driving force F2 and generates the second horizontal driving force F3, the driving force based on the vector sum of F2 and F3 moves the lens unit 170 to the X coordinate on the + X axis . When the driving unit 160 generates the first horizontal driving force F1 and generates the second horizontal driving force F4, the driving force based on the vector sum of F1 and F4 moves the lens unit 170 to the X coordinate on the -X axis .

When the driving unit 160 generates the first horizontal driving force F1 and generates the second horizontal driving force F3, the driving force based on the vector sum of F1 and F3 moves the lens unit 170 to the Y coordinate on the + Y axis . When the driving unit 160 generates the first horizontal driving force F2 and generates the second horizontal driving force F4, the driving force based on the vector sum of F2 and F4 moves the lens unit 170 to the Y coordinate on the -Y axis .

Accordingly, the driving unit 160 can move the lens unit 170 to the X-axis coordinate of the target position and then to the Y-axis coordinate of the target position by controlling the driving direction and the magnitude of the first and second horizontal driving forces . As described above, when the lens unit 170 is moved to the X coordinate, the driving force based on the vector sum of the first and second horizontal driving forces acts on the lens unit 170, so that the driving force in the X- , The magnitude of each of the first and second horizontal driving forces becomes a value obtained by multiplying the driving force in the X-axis direction by cos 45 ㅀ, so that it can be set to a value of approximately 0.707 times.

Similarly, when the lens unit 170 is moved to the Y coordinate, the driving force based on the vector sum of the first and second horizontal driving forces acts on the lens unit 170, so that the driving force in the Y- The magnitude of each of the first and second horizontal driving forces can be set to a value which is approximately 0.707 times smaller than the driving force in the Y-axis direction. Therefore, as described later, the size of the drive unit 160 can be reduced by reducing the size of the first and second magnets 161a and 161b provided in the drive unit 160. [ Alternatively, by reducing the number of turns of the first and second horizontal driving coils 162a and 162b provided in the driving unit 160, the power consumption of the driving unit 160 can be reduced. As a result, miniaturization and weight reduction of the camera module 100 can be realized, or power consumption of the camera module 100 can be reduced.

As shown in FIG. 9, one of the first yokes 163a may be equipped with a first hall sensor 166a for sensing the position of the first magnet 161a by a Hall effect. One of the second yokes 163b may be equipped with a second hall sensor 166b for sensing the position of the second magnet 161b. The first and second Hall sensors 166a and 166b may be respectively disposed in the center holes of the first and second yokes 163a and 163b and fixed to the base 110. [ The first and second hall sensors 166a and 166b sense the positions of the first and second magnets 161a and 161b and provide the sensed positions to the control unit so that the X and Y coordinates of the lens unit 170 can be sensed by the control unit do. The first and second Hall sensors 166a and 166b may be electrically connected to the control unit through the printed circuit board 196. [

As another example, although not shown, the first magnets 161a may be spaced apart from each other in the X axis direction, and the second magnets 161b may be spaced apart in the Y axis direction. The first horizontal driving coils 162a are disposed so as to correspond to the first magnets 161a and generate a horizontal driving force in the X axis direction by interacting with the first magnets 161a according to application of a driving voltage have. The second horizontal driving coils 162b are disposed so as to correspond to the second magnets 161b and generate a horizontal driving force in the Y axis direction by interacting with the second magnets 161b in accordance with application of the driving voltage have. The lens unit 170 can be moved to the target position along the X-axis guide 140 and the Y-axis guide 150 by the horizontal driving force in the X-axis direction and the horizontal driving force in the Y-axis direction.

Meanwhile, as shown in FIGS. 10 and 11, the first guide balls 141a, 141b, and 141c may be arranged on the base 110 in a triangular shape. The first guide balls 141a, 141b, and 141c may have the same shape. The first guide balls 141a, 141b, and 141c support the lower carrier 120 on the base 110 at three points. When the lower carrier 120 is supported at three points on the base 110, since the lower carrier 120 is more structurally stable than four points on the base 110, tilt and resonance occur Can be more advantageous to prevent. In addition, since the contact resistance of the first guide balls 141a, 141b, and 141c is reduced, the power consumption can be reduced.

The second guide balls 151a, 151b, and 151c may be arranged on the lower carrier 120 in a triangular shape. The second guide balls 151a, 151b, and 151c may have the same shape. The second guide balls 151a, 151b and 151c allow the upper carrier 130 to be supported on the lower carrier 120 at three points. If the upper carrier 130 is three-point supported on the lower carrier 120, the upper carrier 130 may be more structurally stable than four-point supported on the lower carrier 120, As described above.

The cover 101 may be formed to surround the upper edge of the upper carrier 130 and the peripheries of the upper and lower carriers 130 and 120 and be fixed on the base 110.

One of the first guide balls 141a, 141b and 141c is disposed at the center of one side of the base 110 along the X axis direction and the remaining first guide balls 141b and 141c And may be disposed at both corners of the opposite side of the base 110 along the X-axis direction.

The first guide ball 141a guiding the first guide ball 141a disposed at the center of one side of the base 110 among the first upper guide grooves 143a 143b 143c and the first lower guide grooves 142a 142b 142c, And the lower guide grooves 143a and 142a may be formed in a shape in which a portion facing the inner wall of the cover 101 is open. 12, the first guide ball 141a is in point contact with the inner wall of the cover 101 through the open portions of the first and second guide grooves 143a and 142a, and is driven in the X- Therefore, the structure of the first and second guide grooves 143a and 142a can be simplified.

One of the second guide balls 151a, 151b and 151c is disposed at the center of one side of the lower carrier 120 along the Y axis direction and the remaining second guide balls 151b, May be disposed at both corners of the opposite side of the lower carrier 120 along the Y-axis direction.

The second guide ball 151a disposed at the center of one side of the lower carrier 120 among the second upper guide grooves 153a, 153b, 153c and the second lower guide grooves 152a, 152b, The upper and lower guide grooves 153a and 152a may be formed in a shape in which the portion facing the inner wall of the cover 101 is open. 13, the second guide ball 151a is in point contact with the inner wall of the cover 101 through the open portions of the second upper and lower guide grooves 153a and 152a, and is driven in the Y-axis direction The structure of the second and upper guide grooves 153a and 152a can be simplified.

The first lower guide grooves 142a, 142b and 142c and the first upper guide grooves 143a, 143b and 143c may be formed so as to be in point contact with the first guide balls 141a, 141b and 141c have. The first lower guide grooves 142a, 142b, and 142c may be formed such that their bottom surfaces are horizontal. The first lower guide grooves 142a, 142b, and 142c may be formed such that the inner side surface along the X axis direction is inclined at an obtuse angle with respect to the bottom surface.

The first upper guide grooves 143a, 143b, 143c may be formed such that the bottom surfaces of the first upper guide grooves 143a, 143b, 143c are horizontal. The first upper guide grooves 143a, 143b, 143c may be formed such that the inner side surface along the X-axis direction is inclined at an obtuse angle with respect to the bottom surface. Accordingly, the first guide balls 141a, 141b, and 141c may be in point contact with the bottom and side surfaces of the first lower guide grooves 142a, 142b, and 142c and the first upper guide grooves 143a, 143b, and 143c.

The second lower guide grooves 152a, 152b and 152c and the second upper guide grooves 153a, 153b and 153c may be formed in point contact with the second guide balls 151a, 151b and 151c, respectively, have. The bottom surfaces of the second lower guide grooves 152a, 152b, and 152c may be formed to be horizontal. The second lower guide grooves 152a, 152b, and 152c may be formed such that the inner side surface along the Y axis direction is inclined at an obtuse angle with respect to the bottom surface.

The bottom surfaces of the second upper guide grooves 153a, 153b, and 153c may be horizontal. The inner side surfaces of the second upper guide grooves 153a, 153b, and 153c along the Y-axis direction may be inclined at an obtuse angle with respect to the bottom surface. Therefore, the second guide balls 151a, 151b, and 151c may be in point contact with the bottom and side surfaces of the second lower guide grooves 152a, 152b, and 152c and the second upper guide grooves 153a, 153b, and 153c.

The first lower guide grooves 142b and 142c that receive the first guide balls 141b and 141c disposed at both corners of the base 110 may have a closed perimeter. The first lower guide grooves 142b and 142c may be formed such that the outer side surface along the X axis direction is inclined at an obtuse angle with respect to the bottom surface. In this case, the first upper guide grooves 143b and 143c may be formed in an outer shape facing the inner wall of the cover 101.

The second upper guide grooves 153b and 153c, which accommodate the second guide balls 151b and 151c disposed at both corners of the lower carrier 120, have lateral sides in the Y axis direction, And the outer side portion of the side wall may be in the shape of a hollow. The outer side surfaces of the second upper guide grooves 153b and 153c along the Y axis direction may be inclined at an obtuse angle with respect to the bottom surface. In this case, the second lower guide grooves 152b and 152c are formed in a shape corresponding to the outer side surfaces of the second upper guide grooves 153b and 153c, and the second upper guide grooves 153b and 153c And the portion corresponding to the outer cut-out portion may be formed in a clogged form.

14, one of the first lower guide grooves 142a 'is formed to have a V-shaped cross section on the upper surface of the base 110', and the first lower guide groove 142a ' The corresponding first upper guide groove 143a 'may be formed to have a V-shaped cross section on the lower surface of the lower carrier 120'. Accordingly, the lower portion of the first guide ball 141a is in contact with the first lower guide groove 142a 'at two points, and the upper portion of the first guide ball 141a is in contact with the first upper guide groove 143a' . The remaining first and second guide grooves may also be formed to have a V-shaped cross section.

15, one of the second lower guide grooves 152a 'is formed to have a V-shaped cross section on the upper surface of the lower carrier 120', and the second lower guide grooves 152a ' The corresponding second upper guide groove 153a 'may be formed to have a V-shaped cross section on the lower surface of the upper carrier 130'. Accordingly, the lower portion of the second guide ball 151a is in contact with the second lower guide groove 152a 'at two points, and the upper portion of the second guide ball 151a is in a state of two-point contact with the second upper guide groove 153a' . And the remaining second phase and lower guide grooves may be formed to have a V-shaped cross section.

On the other hand, as shown in Figs. 16 and 17, each of the magnets 161a and 161b has an inner portion near the lens unit 170 and an outer portion far from the lens unit 170 having N poles, Are arranged to have the S-pole. Here, the yokes 163a 'and 163b' may be arranged to correspond to the N poles of the magnets 161a and 161b.

Therefore, as shown in FIG. 18, the magnetic force lines are generated from the N poles of the magnets 161a and 161b to enter the S pole, and the corresponding horizontal driving coils 162a and 162b ) Can be increased. As a result, the horizontal driving force generated by the action between the magnets 161a and 161b and the horizontal driving coils 162a and 162b can be increased.

For example, each of the first magnets 161a may have an N-pole at the inner portion and an S-pole at the outer portion. Each of the second magnets 161b may have an N pole at the inner side and an S pole at the outer side. The first yoke 163a 'is disposed corresponding to each N pole of the first magnets 161a. The first yoke 163a 'has a plate shape and can be fixed to the lower surface of the connecting board 116 while facing the N pole region of the lower surface of the first magnet 161a. And the second yoke 163b 'is disposed corresponding to each N pole of the second magnets 161b. The second yoke 163b 'is formed in a plate shape and can be fixed to the lower surface of the connecting board 116 while facing the N pole region of the lower surface of the second magnet 161b.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation and that those skilled in the art will recognize that various modifications and equivalent arrangements may be made therein. It will be possible. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

110 .. Base 116 .. Connection board
117 .. Contact pad 118 .. Conductive grease
120. Lower carrier 130. Upper carrier
131 .. lower spring 132 .. contact terminal
136. Upper spring 140..X axis guide
141a, 141b, 141c. The first guide ball 150, Y axis guide
151a, 151b, 151c. Second guide ball 160. Drive unit
161a .. first magnet 161b .. second magnet
162a .. First horizontal driving coil 162b .. Second horizontal driving coil
163a, 163a '.. First yoke 163b, 163b' .. Second yoke
170 .. Lens unit 180 .. Coils for vertical driving

Claims (6)

Base;
A lower carrier disposed on the base;
An upper carrier disposed on the lower carrier;
An X-axis guide having first guide balls arranged on the base, and first guide grooves formed on an upper surface of the base and a lower surface of the lower guide to guide horizontal movement of the first guide balls along the X- ;
And second guide grooves formed on the upper surface of the lower carrier and the lower surface of the upper carrier to guide the horizontal movement of the second guide balls along the Y axis direction, Axis guide;
A horizontal driving coils fixed to the base and cooperating with the magnets to horizontally move the lower carrier and the upper carrier according to application of a driving voltage, A drive unit having yokes for respectively receiving attraction force from the magnets;
A lens unit arranged to penetrate through the center of each of the upper and lower carriers and supported by elastic force against the upper carrier by upper and lower springs; And
And a vertical driving coil fixed to the lens unit and interacting with the magnets in accordance with application of a driving voltage to generate a vertical driving force in a Z axis direction,
Wherein the lower spring has a conductive shape and is divided into two parts, the division parts being electrically connected to wiring terminals of the vertical driving coil, respectively, and each having a contact terminal;
Wherein the base is formed with contact pads on the upper surface thereof, the contact pads being in contact with the contact terminals, respectively;
Wherein the contact terminals are partially impregnated with a conductive grease applied to the contact pads so as to maintain the contact pads in a state of being conductive with the contact pads even when the contact pads are moved in the X- and Y- A camera module having an image stabilization function. delete The method according to claim 1,
The contact terminals are elastically deformed to contact the contact pads;
Wherein the coating region of the conductive grease is larger than the movable region of the contact terminals. The method according to claim 1,
The first guide grooves include first lower guide grooves formed on the upper surface of the base to have a V-shaped section, and first upper guide grooves formed on the lower surface of the lower carrier to have a V-shaped section;
The second guide grooves include second lower guide grooves formed on the upper surface of the lower carrier to have a V-shaped cross section, and second upper guide grooves formed on the lower surface of the upper carrier to have a V-shaped cross section. Camera module with compensation function. The method according to claim 1,
Wherein the first guide grooves include first lower guide grooves formed on an upper surface of the base and first upper guide grooves formed on a lower surface of the lower carrier, The first guide ball is formed in point contact with the first guide ball;
Wherein the second guide grooves include second lower guide grooves formed on an upper surface of the lower carrier and second upper guide grooves formed on a lower surface of the upper carrier, And the second guide ball is in point contact with the second guide ball. The method according to claim 1,
Wherein each of the magnets is arranged so that one of an inner portion near the lens unit and an outer portion far from the lens unit has an N pole and the other has an S pole,
And the yoke is disposed to correspond to the N pole of each of the magnets.
KR1020150113955A 2015-08-12 2015-08-12 Camera module with optical image stabilization function KR101640565B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150113955A KR101640565B1 (en) 2015-08-12 2015-08-12 Camera module with optical image stabilization function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150113955A KR101640565B1 (en) 2015-08-12 2015-08-12 Camera module with optical image stabilization function

Publications (1)

Publication Number Publication Date
KR101640565B1 true KR101640565B1 (en) 2016-07-18

Family

ID=56679838

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150113955A KR101640565B1 (en) 2015-08-12 2015-08-12 Camera module with optical image stabilization function

Country Status (1)

Country Link
KR (1) KR101640565B1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180024145A (en) * 2016-08-29 2018-03-08 주식회사 엠씨넥스 Camera module
WO2019004583A1 (en) * 2017-06-30 2019-01-03 (주)알비케이이엠디 Mobile terminal camera module
WO2019066530A1 (en) * 2017-09-29 2019-04-04 엘지이노텍 주식회사 Lens driving apparatus, camera module and optical device
CN110677567A (en) * 2019-09-30 2020-01-10 维沃移动通信有限公司 Camera module and electronic equipment
KR20200005436A (en) 2018-07-05 2020-01-15 주식회사 엠씨넥스 Camera module with optical image stabilization feature
KR20200070704A (en) 2018-12-10 2020-06-18 주식회사 엠씨넥스 Camera with shake correction function
KR20200116402A (en) 2019-04-01 2020-10-12 삼성전기주식회사 Camera Module
WO2022000552A1 (en) * 2020-06-30 2022-01-06 诚瑞光学(常州)股份有限公司 Lens driving device
US11513308B2 (en) 2019-04-01 2022-11-29 Samsung Electro-Mechanics Co., Ltd. Camera module
US11555978B2 (en) 2018-07-05 2023-01-17 Mcnex Co., Ltd. Camera module with optical image stabilization function

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140064055A (en) * 2012-11-19 2014-05-28 삼성전기주식회사 Camera module
KR20150042681A (en) * 2013-10-11 2015-04-21 삼성전기주식회사 Camera module and portable electronic device including the same
KR20150083053A (en) * 2015-06-23 2015-07-16 자화전자(주) Camera lens module

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140064055A (en) * 2012-11-19 2014-05-28 삼성전기주식회사 Camera module
KR20150042681A (en) * 2013-10-11 2015-04-21 삼성전기주식회사 Camera module and portable electronic device including the same
KR20150083053A (en) * 2015-06-23 2015-07-16 자화전자(주) Camera lens module

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180024145A (en) * 2016-08-29 2018-03-08 주식회사 엠씨넥스 Camera module
KR102588578B1 (en) * 2016-08-29 2023-10-12 주식회사 엠씨넥스 Camera module
WO2019004583A1 (en) * 2017-06-30 2019-01-03 (주)알비케이이엠디 Mobile terminal camera module
WO2019066530A1 (en) * 2017-09-29 2019-04-04 엘지이노텍 주식회사 Lens driving apparatus, camera module and optical device
CN111183384A (en) * 2017-09-29 2020-05-19 Lg伊诺特有限公司 Lens driving device, camera module, and optical apparatus
US11762215B2 (en) 2017-09-29 2023-09-19 Lg Innotek Co., Ltd. Lens driving apparatus, camera module and optical device
KR20200005436A (en) 2018-07-05 2020-01-15 주식회사 엠씨넥스 Camera module with optical image stabilization feature
US11555978B2 (en) 2018-07-05 2023-01-17 Mcnex Co., Ltd. Camera module with optical image stabilization function
KR20200070704A (en) 2018-12-10 2020-06-18 주식회사 엠씨넥스 Camera with shake correction function
US11513308B2 (en) 2019-04-01 2022-11-29 Samsung Electro-Mechanics Co., Ltd. Camera module
KR20220068213A (en) 2019-04-01 2022-05-25 삼성전기주식회사 Camera Module
KR20210084404A (en) 2019-04-01 2021-07-07 삼성전기주식회사 Camera Module
KR20200116402A (en) 2019-04-01 2020-10-12 삼성전기주식회사 Camera Module
WO2021063246A1 (en) * 2019-09-30 2021-04-08 维沃移动通信有限公司 Photographing module and electronic device
CN110677567A (en) * 2019-09-30 2020-01-10 维沃移动通信有限公司 Camera module and electronic equipment
WO2022000552A1 (en) * 2020-06-30 2022-01-06 诚瑞光学(常州)股份有限公司 Lens driving device

Similar Documents

Publication Publication Date Title
KR101640565B1 (en) Camera module with optical image stabilization function
KR101682178B1 (en) Camera module with optical image stabilization function
CN106101494B (en) Lens moving device, and camera module and optical apparatus including the same
KR102588578B1 (en) Camera module
US8681227B2 (en) Photography device having anti-shake function
US9377632B2 (en) Lens driving device with 3D elastic support structure
KR101825731B1 (en) Camera lens module with structure for optical image stabilization
US20190041662A1 (en) Optical image stabilization mechanism
KR20180099512A (en) Ois camera module favorable to dual camera arrangement and dual camera system including the ois camera modules
US20160054578A1 (en) Lens actuator
US10564516B2 (en) Iris module and camera module including the same
KR20160089557A (en) Combined plate spring and camera lens module capable of optical image stabilization with the same
TW201518800A (en) Camera module and portable electronic device including the same
KR20140112694A (en) Lens actuator
KR101730268B1 (en) Camera module
JP2017156775A (en) Anti-shake device
US20210297596A1 (en) Lens driving device, camera module, and camera-mounted apparatus
KR101696172B1 (en) Optical Image Stabilizer device and Camera module containing the same
KR101823326B1 (en) Actuator for ois
US10701248B2 (en) Iris module and camera module including the same
CN109073851B (en) Lens driving device, and camera module and optical device including the same
KR102069631B1 (en) Camera module
KR20160102803A (en) Optical Image Stabilizer device and Camera module containing the same
CN112068382A (en) Anti-shake motor
JP2015143722A (en) lens actuator

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant