KR20100109727A - Correction module for shaking of camera, camera module comprising the same and method of manufacturing the camera module - Google Patents

Abstract

PURPOSE: A camera shaking correction module, and a camera module including the same and a method for manufacturing the camera module are provided to mount a existing lens module which does not have shaking function by a cartridge method, thereby conveniently adding a shaking correction function. CONSTITUTION: A module moving object attachably and detachably accepts the lens module accepting lenses. The lenses form light showing an image of a subject to an image sensor. A first voice call motor driving parts(21,22) and a second voice call motor driving parts(31,32) vibrates the module moving body according to an X axis and Y axis. The first and the second voice coil motor driving part have a permanent magnet and a coil part. The X axis and the Y axis is parallel to two side which is perpendicular to photographing surface of the image sensor.

Description

Camera shake compensation module, camera module and camera module manufacturing method including the same {Correction Module for Shaking of Camera, Camera Module Comprising the Same and Method of Manufacturing the Camera Module}

The present invention relates to a camera shake correction module, a camera module having the same, and a method for manufacturing a camera module, and more particularly, to a shake correction module for further implementing a shake correction function in an existing camera module. It relates to a camera module manufacturing method.

Digital camera modules capture images using image sensors such as CCDs and CMOS instead of film. The camera module with an image sensor is employed in mobile devices capable of transmitting video and taking pictures, such as mobile phones, laptop computers, portable digital assistants (PDAs), cameras for inserting monitors, car rear view surveillance cameras for car bumpers, and interphone cameras. It is becoming.

In general, camera modules employed in portable electronic devices are becoming complex, multifunctional, miniaturized, and lightweight, and the lens assemblies of the camera module are also miniaturized due to the miniaturization and high precision of the lens used therein. In order to clearly capture a subject in the optical system of the camera module which is miniaturized as described above, a shake correction function is required.

For the shake correction function, a shake correction module which vibrates the image sensor unit or the lens unit in a predetermined direction is required. Since the shake compensation module must have a motor driving unit such as a step motor or a voice coil motor, the module volume is increased. Therefore, there is an urgent need for a shake correction module that can easily add shake correction without taking up a large volume.

The shake correction module, the camera module and the camera module manufacturing method according to the present invention can be equipped with a conventional lens module without a shake correction in a cartridge method to easily implement a shake correction function as well as to reduce the volume It aims to do it.

In order to solve the above problems, according to an aspect of the present invention, (i) a module movable body detachably accommodated therein the lens module for receiving the lenses to cause the light to represent the image of the subject to the image sensor, and ( ii) vibrating the module moving body along an X axis and a Y axis parallel to two orthogonal sides of the image plane of the image sensor, respectively, the first voice coil motor driving unit and the second voice coil motor having a permanent magnet and a coil unit, respectively; The permanent magnet unit is coupled to the module moving body, and the coil unit is shake correction that is spaced apart in the Z-axis direction perpendicular to the virtual horizontal plane made by the X-axis and Y-axis corresponding to the permanent magnet portion The module is disclosed.

The first voice coil motor driving unit includes a first A voice coil motor driving unit and a first B voice coil motor driving unit disposed to face each other on both sides of the module moving body in the X-axis direction, and the second voice coil motor driving unit Has a 2A voice coil motor driver and a 2B voice coil motor driver disposed to face each other on both sides of the module moving body in the Y-axis direction, wherein each voice coil motor driver is substantially along the Z-axis direction. And a permanent magnet, a PCB coil, and a yoke arranged to correspond.

The side end surface of the permanent magnet may have a shape in which both ends protrude.

The PCB coil is formed by interconnecting wiring patterns formed in a multilayer printed circuit board, and the PCB coil is disposed to correspond to each other between the periphery of the image sensor and the permanent magnet, and the yoke is the PCB coil and the image. The peripheral parts of the sensor may be disposed to correspond to each other.

The permanent magnet is magnetized and the coil arrangement direction of the coil part is determined so that the module moving body can be moved in a direction parallel to the virtual horizontal plane.

The apparatus may further include a vertical movement limiter configured to limit movement in the Z-axis direction so that the module movable body may be horizontally moved on the virtual horizontal plane.

Further comprising an upper holder and a lower holder for supporting the module moving body in which the photographing module is seated therein,

The vertical movement limiting part includes a plurality of upper balls interposed between the upper holder and the module moving body and a plurality of lower balls interposed between the lower holder and the module moving body.

The shake correction module according to an embodiment is (i) a housing surrounding at least a side of the module moving body, (ii) the module moving body is disposed on both sides in the X-axis direction, respectively, and if no external force is applied to the X A first pair of elastic members for applying an elastic force to the module moving body so that the module moving body is at the center of the housing in the axial direction, and (iii) the module moving body is disposed on both sides of the module moving body in the Y-axis direction, respectively, If not, may further include a second pair of elastic members for applying an elastic force to the module moving body in the Y-axis direction so that the module moving body is in the center of the housing.

According to another aspect of the present invention, (i) an image sensor for converting light representing an image of a subject into an electrical signal representing an image, and (ii) accepting lenses for condensing light representing an image of the subject to the image sensor. (Iii) a module movable body for detachably accommodating the lens module therein; and (iv) vibrating the module movable body along an X axis and a Y axis, respectively, parallel to two orthogonal sides of the imaging surface of the image sensor. And a first voice coil motor driver and a second voice coil motor driver each having a permanent magnet part and a coil part, (v) a movement in the Z-axis direction so that the module moving body can be horizontally moved on the virtual horizontal plane. (Vi) an upper holder and a lower holder for supporting the module moving body on which the lens module is seated, (vi) i) a housing surrounding at least a side surface of the module moving body, (viii) disposed on both sides of the module moving body in the X-axis direction, respectively, and the module moving body is moved in the X-axis direction if no external force is applied. A pair of first elastic members for applying an elastic force to the module moving body so as to be centered, and (ix) disposed on both sides of the module moving body in the Y-axis direction, respectively, and the module moving body in the Y-axis direction if no external force is applied Disclosed is a camera module including a second pair of elastic members for applying an elastic force to the module moving body so that the center of the housing is at the center of the housing.

The permanent magnet part may be coupled to the module moving body, and the coil part may be disposed to correspond to the permanent magnet part in a Z-axis direction perpendicular to a virtual horizontal plane formed by the X and Y axes.

According to another aspect of the invention, providing a shake correction module built-in image sensor; And inserting and inserting a lens module for coupling light representing an image of a subject to the image sensor into an interior of the shake correction module.

The shake correction module comprises (i) a module movable body for detachably accommodating the lens module therein, and (ii) the module movable body along an X axis and a Y axis parallel to two orthogonal sides of an image plane of the image sensor, respectively. And a first voice coil motor driving unit and a second voice coil motor driving unit each having a permanent magnet and a coil unit, wherein the permanent magnet unit is coupled to the module moving body, and the coil unit corresponds to the permanent magnet unit. The X-axis and the Y-axis is characterized in that spaced apart in the Z-axis direction perpendicular to the imaginary horizontal plane.

The shake correction module, the camera module, and the camera module manufacturing method according to the embodiment of the present invention can be easily corrected because the conventional lens module without the shake correction function can be mounted to the miniaturized shake correction module by a cartridge method. Additional features can be implemented and compact camera modules can be created. Therefore, you can get a clear picture despite the camera shake.

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

1 is an exploded perspective view of a shake correction module and a camera module according to an embodiment of the present invention.

Referring to the drawings, a camera module according to an embodiment includes an image sensor 13, a lens module 10, and a shake correction module.

The image sensor 13 receives the subject light and converts it into an electrical signal for an image. The image sensor 13 may be, for example, a CMOS sensor or a CCD sensor. The image sensor 13 may be mounted on the printed circuit board 12 and chip packaged.

The lens module 10 includes a plurality of lenses therein and a barrel for supporting and receiving the lenses therein. The lenses of the lens module 10 allow the subject light to form on the imaging surface of the image sensor 13. The lens module 10 may further include AF lenses for auto focusing (AF). In addition, the lens module 10 may further include zoom lenses for zooming. The housing 54 of the lens module is configured to be detachably attached to the module moving body 11 of the shake correction module to be described later.

The shake correction module according to an exemplary embodiment includes a module moving body 11, a first voice coil motor driver 21 and 22, a second voice coil motor driver 31 and 32, a holder 51 and 52, and a horizontal movement limiter. 61 and 62, the housing 54, the 1st elastic member pair 41 and 42, and the 2nd elastic member pair 43 and 44 are provided.

The lens module 10 is detachably inserted into the module moving body 11. That is, the conventional lens module 10, for example, the conventional AF camera lens module 10 without a shake correction function can be mounted in the cartridge moving body 11 inside the module. Thereby, the AF camera lens module 10 vibrates in a predetermined direction by the action of the shake correction module to be described later, and consequently has a shake correction function. The module moving body 11 may have a rectangular shape as a whole.

In the upper portion of the corner of the module moving body 11, for example, four corners, an upper ball seating portion 11a is formed, on which balls 61 acting as vertical movement limiting portions are seated. The lower ball seating part 11b in which the balls 62 which operate similarly as a vertical movement limiting part is seated is formed in the lower part.

The first voice coil motor driving units 21 and 22 serve to move the module moving body 11 in the X-axis direction (for example, one of two sides orthogonal to the image plane of the image sensor 13). The second voice coil motor driving units 31 and 32 serve to move the module moving body 11 in the Y-axis direction (for example, the direction of the other side of two orthogonal sides of the imaging surface of the image sensor 13).

The first voice coil motor driver 21, 22 includes a first A voice coil motor driver 21 and a first B voice coil motor driver 22 disposed on both sides of the module moving body 11 in the X-axis direction. , Each has permanent magnets 21a and 22a and coil portions 21b, 21c, 22b and 22c. Similarly, the second voice coil motor driving units 31 and 32 are each of the second A voice coil motor driving unit 31 and the second B voice coil motor driving unit 32 disposed on both sides of the module moving body 11 in the Y-axis direction. ), Each having permanent magnets 31a and 32a and coil portions 31b, 31c, 32b and 32c.

Each permanent magnet 21a, 22a, 31a, 32a is coupled to the inner wall of the module moving body 11. The side cross-sections of the permanent magnets 21a, 22a, 31a, and 32a have both ends protruding outward. That is, the side cross-sectional shape of the permanent magnets 21a, 22a, 31a, and 32a has a 'c' shape as a whole and is embedded in the inner wall of the module moving body 11. This increases the ease of mounting the permanent magnets 21a, 22a, 31a, and 32a on the inner wall of the module movable body 11, does not increase the volume of the module movable body 11, and increases the size of the magnetic field by increasing the permanent magnet surface area. Can be increased.

The coil portion includes PCB coils 21b, 22b, 31b, 32b and yoke 21c, 22c, 31c, 32c. The PCB coils 21b, 22b, 31b, and 32b are formed by being connected to each other so that the wiring patterns formed in the multilayer printed circuit board may form a coil as a whole. The PCB coils 21b, 22b, 31b, and 32b are all formed at four locations corresponding to the permanent magnets, and each coil is configured to be powered independently of each other. Referring to FIG. 3, the PCB coils 21b, 22b, 31b and 32b are mutually disposed between the periphery of the image sensor 13 and the permanent magnets 21a, 22a, 31a and 32a in the height direction (Z-axis direction). Although arranged correspondingly, as a kind of printed circuit board, it is very thin and does not increase the size of the shake correction module in the height direction much. It also does not increase the size of the shake correction module in the X-axis or Y-axis direction. Therefore, it contributes to the miniaturization of the shake correction module.

Referring to FIG. 3, the yoke assemblies 21c, 22c, 31c, and 32c correspond to each other between the PCB coils 21b, 22b, 31b, and 32b and the periphery of the image sensor 13 in the Z-axis direction. Is placed. That is, the PCB coils 21b, 22b, 31b, and 32b are disposed to correspond to each other. The yokes 21c, 22c, 31c, and 32c serve to agglomerate the magnetic field generated when current flows through the coil.

PCB coils 21b, 22b, 31b, and 32b and yokes 21c, 22c, 31c, and 32c are assembled to be fixedly coupled to the lower holder 51, while permanent magnets 21a, 22a, 31a, and 32a are disposed therein. The module moving body 11 to be installed is assembled so as to be movable in the horizontal direction between the upper holder 52 and the lower holder 51 on a plane made by the X and Y axes.

The voice coil motor driving unit having such a configuration has a magnetic field formed around the coils 21b, 22b, 31b, and 32b when power is applied to the coil, so that the coil portion acts as a kind of electromagnet, thereby providing the coil portion and the permanent magnet 21a. The module moving body 11 can be moved in the X-axis and Y-axis directions together with the permanent magnet by the interaction between the 22a, 31a, and 32a. The permanent magnets 21a, 22a, 31a and 32a are magnetized so that the repulsive force and attraction between the permanent magnets 21a, 22a, 31a and 32a and the coil portion act in the horizontal direction, and the coil arrangement direction of the coil portion is also determined.

The holder has an upper holder 52 and a lower holder 51. The image sensor 13, the PCB coils 21b, 22b, 31b and 32b and the yokes 21c, 22c, 31c and 32c are fixedly coupled to the lower holder 51. Then, the module moving body 11 in which the lens module 10 is accommodated therein is disposed to move in the horizontal direction on the lower holder 51. The upper holder 52 is coupled to the lower holder 51 from the upper direction of the module moving body 11. Therefore, the module moving body 11 is disposed to be moved in the horizontal direction between the upper holder 52 and the lower holder 51.

The upper ball 61 is seated on the upper ball seating part 11a of the module moving body 11, and the lower ball 62 is seated on the lower ball seating part 11b, respectively. Referring to FIG. 3, since the upper ball 61 and the lower ball 62 are configured to enable rolling motion within the seating portions 11a and 11b, the upper balls 61 may have the upper holder 52 and the module moving body 11. The lower balls 62 smoothly move in the horizontal direction of the module moving body 11 while reducing the coefficient of friction between the upper surface of the lower surface and the lower coefficient of friction between the lower holder 51 and the lower surface of the module moving body 11. . Therefore, even if the driving force of the first and second voice coil motor drive unit is small, there is an effect that the movement in the X-axis and Y-axis direction is smooth. In addition, the module mobile body 11 moves in the horizontal direction by the rolling motion of the balls 61 and 62 in the holders 51 and 52, so that the module mobile body 11 moves in the vertical direction (Z-axis direction). There is no room for it. That is, the upper balls 61 and the lower balls 62 operate as vertical movement limiters. Therefore, unlike the conventional voice coil motor driving method, even if an external force is applied, movement in the Z-axis direction does not occur, and as a result, the possibility of adversely affecting the picture quality due to vibration can be excluded.

The housing 54 surrounds all of the module moving body 11, the upper holder 52, and the lower holder 51, and an incidence opening is formed so that the subject light is incident on the imaging surface of the image sensor 13.

The first elastic member pairs 41 and 42 are disposed on both outer sides of the module movable body 11 in the X-axis direction, and the second elastic member pairs 43 and 44 are disposed of the module movable body 11 in the Y-axis direction. It is arranged on both sides. The first pair of elastic members 41, 42 basically provides a restoring force for the module moving body 11 to be centered in the center in the X-axis direction. The second pair of elastic members 43, 44 basically provides a restoring force for the module moving body 11 to be centered in the center in the Y-axis direction. When no power is applied to the first and second voice coil motor driving units, the center of the lens module 10 is always the image sensor by the first elastic member pairs 41 and 42 and the second elastic member pairs 43 and 44. (13) It is possible to prevent the deterioration of the picture quality by centering the imaging surface.

In addition, the restoring force of the first elastic member pairs 41 and 42 and the second elastic member pairs 43 and 44 is such that only the driving force of the motor is such that the camera shake due to the hand shake occurs quickly to reach several tens of Hz per second. Even in an environment in which it is difficult to produce a vibration corresponding to, it is possible to more easily generate an artificial vibration applied to the camera module.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

The invention can be used in the industry of manufacturing and using camera modules.

1 is an exploded perspective view of a shake correction module and a camera module according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of a module moving body of the shake correction module illustrated in FIG. 1, a first voice coil motor driver and a second voice coil motor driver driving the same;

3 is a partial cross-sectional view of the camera module shown in FIG.

Brief description of symbols for the main parts of the drawings

10: Lens Module 11: Module Moving Object

12: printed circuit board 13: image sensor

21, 22: first voice coil motor drive unit 21a, 22a, 31a, 32a: permanent magnet

21b, 22b, 31b, 32b: PCB coils 21c, 22c, 31c, 32c: yoke

31, 32: 2nd voice coil motor drive part 41, 42: 1st elastic member pair

43, 44: second elastic member pair 51: lower holder

52: upper holder 54: housing

Claims (12)

A module movable body configured to removably receive a lens module configured to accommodate lenses for condensing light representing an image of a subject to an image sensor; And A first voice coil motor driving unit and a second voice coil motor driving unit oscillating the module moving body along an X axis and a Y axis parallel to two orthogonal sides of the image plane of the image sensor, respectively, the permanent magnet and the coil unit; Including; The permanent magnet part is coupled to the module moving body, wherein the coil part is disposed to be spaced apart in the Z axis direction perpendicular to the virtual horizontal plane made by the X axis and the Y axis corresponding to the permanent magnet part. According to claim 1, The first voice coil motor driving unit includes a first A voice coil motor driving unit and a first B voice coil motor driving unit disposed to face each other on both sides of the module moving body in the X-axis direction, and the second voice coil motor driving unit 2A voice coil motor driving unit and 2B voice coil motor driving unit disposed to face each other on both sides of the module moving body in the Y-axis direction, Each voice coil motor driver includes a permanent magnet, a PCB coil, and a yoke disposed substantially corresponding along the Z-axis direction. The method of claim 2, The side end surface of the permanent magnet is a shake correction module having a shape in which both ends protrude. The method of claim 2, The PCB coil is formed by interconnecting wiring patterns formed in a multilayer printed circuit board, and the PCB coil is disposed to correspond to each other between the periphery of the image sensor and the permanent magnet, and the yoke is the PCB coil and the image. Image stabilizer module disposed to correspond to each other between the periphery of the sensor. The method of claim 2, And the permanent magnet is magnetized and the coil arrangement direction of the coil part is determined so that the moving module body can be moved in a direction parallel to the virtual horizontal plane. According to claim 1, And a vertical movement limiting unit for limiting movement in the Z-axis direction so that the module movable body can be horizontally moved on the virtual horizontal plane. The method according to claim 6, Further comprising an upper holder and a lower holder for supporting the module moving body on which the photographing module is seated therein, The vertical movement limiting part includes a plurality of upper balls interposed between the upper holder and the module moving body and a plurality of lower balls interposed between the lower holder and the module moving body. According to claim 1, A housing surrounding at least a side of the module moving body; A pair of first elastic members disposed on both sides of the module moving body in the X-axis direction and applying elastic force to the module moving body so that the module moving body is at the center of the housing in the X-axis direction when no external force is applied; And A pair of second elastic members disposed on both sides of the module moving body in the Y-axis direction and applying an elastic force to the module moving body so that the module moving body is at the center of the housing in the Y-axis direction when no external force is applied; Image stabilization module further including. An image sensor for converting light representing an image of a subject into an electrical signal representing an image; A lens module accommodating lenses for condensing light representing the image of the subject to the image sensor; A module moving body accommodating the lens module therein in a detachable manner; A first voice coil motor driving unit and a second voice coil motor each oscillating the module moving body along an X axis and a Y axis parallel to two orthogonal sides of an image plane of the image sensor, respectively, the permanent magnet part and the coil part; A drive unit; A vertical movement limiter configured to limit movement in the Z-axis direction so that the module movable body may be horizontally moved on the virtual horizontal plane; An upper holder and a lower holder for supporting the module moving body in which the lens module is mounted; A housing surrounding at least a side of the module moving body; A pair of first elastic members disposed on both sides of the module moving body in the X-axis direction and applying elastic force to the module moving body so that the module moving body is at the center of the housing in the X-axis direction when no external force is applied; And A pair of second elastic members disposed on both sides of the module moving body in the Y-axis direction and applying elastic force to the module moving body so that the module moving body is at the center of the housing in the Y-axis direction when no external force is applied; Camera module comprising a. The method of claim 9, The permanent magnet unit is coupled to the module moving body, the coil unit camera module disposed corresponding to the permanent magnet portion in the Z-axis direction perpendicular to the virtual horizontal plane made by the X-axis and Y-axis. Providing a shake correction module with an image sensor embedded therein; And And inserting and inserting a lens module for coupling light representing an image of a subject to the image sensor into the image stabilizer module. The shake correction module, A module moving body accommodating the lens module therein in a detachable manner; And A first voice coil motor driving unit and a second voice coil motor driving unit oscillating the module moving body along an X axis and a Y axis parallel to two orthogonal sides of the image plane of the image sensor, respectively, the permanent magnet and the coil unit; Including; The permanent magnet part is coupled to the module moving body, wherein the coil part is disposed spaced apart in the Z axis direction perpendicular to the virtual horizontal plane made by the X axis and the Y axis corresponding to the permanent magnet part.

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