KR101895965B1 - Camera module - Google Patents

Abstract

A camera module is disclosed. The camera module comprises: a housing; A lens barrel disposed within the housing, the lens barrel receiving a lens assembly comprising at least one lens; An elastic member fixed to the housing and the lens barrel; A driving unit for moving the lens barrel relative to the housing; And a sensor unit fixed to the housing.

Description

Camera module {CAMERA MODULE}

An embodiment relates to a camera module.

Currently, a camera module is mounted in the manufacture of automobiles and endoscopes including an IT device such as a mobile communication terminal, a PDA, and an MP3 player. Such a camera module is a 300,000 pixel (VGA class) And various kinds of additional functions such as autofocusing (AF) and optical zooming can be implemented at a low cost of production.

In addition, currently manufactured camera modules include an image sensor module manufactured by a wire bonding method (COB: Chip Of Board), a flip chip method (COF: Chip Of Flexible) and a chip scale package method (CSP And is connected to the main board through an electrical connection means such as a printed circuit board (PCB) or a flexible printed circuit board (FPCB).

In recent years, however, a camera module has been demanded from a user that can be directly mounted on a main board as in a general passive device, thereby simplifying a manufacturing process and reducing manufacturing cost.

Such a camera module is mainly manufactured by attaching an image sensor such as a CCD or a CMOS to a substrate by wire bonding or flip chip method. The image sensor collects an image of the object through the image sensor, And the stored data is converted into an electrical signal and displayed as an image through a display medium such as an LCD or a PC monitor in the apparatus.

The conventional camera module includes a housing in which an image sensor for converting an image signal received through a lens into an electrical signal is supported on a bottom surface, a lens group for collecting image signals of a subject to the image sensor, And a barrel.

At this time, a capacitor, which is an electrical component for driving an image sensor made of CCD or CMOS, and a mounting board (FPCB) having a chip component of the resistor are electrically coupled to the lower part of the housing.

In the conventional camera module thus configured, anisotropic conductive film (ACF: Anisotropic Conductive Film) is inserted between the substrate and the image sensor in a state that a plurality of circuit components are mounted on the mounting substrate (FPCB) Adhered and fixed, and an infrared cut filter portion is attached to the opposite surface.

In addition, in the state where the barrel and the housing in which a plurality of lens groups are incorporated are coupled by screwing, the pre-assembled mounting substrate is adhered and fixed to the bottom surface of the housing by a separate adhesive.

The focus adjustment is performed by setting a subject (resolution chart) to a predetermined distance in front of the barrel after the mounting substrate on which the image sensor is mounted and the housing coupled with the barrel are fixed to each other. The focus adjustment between the lens group and the image sensor is performed as the vertical transfer amount due to the rotation of the barrel threaded to the housing is adjusted.

The embodiment intends to provide a camera module that effectively prevents camera shake.

A camera module according to an exemplary embodiment includes a housing; A lens barrel disposed within the housing, the lens barrel receiving a lens assembly comprising at least one lens; An elastic member fixed to the housing and the lens barrel; A driving unit for moving the lens barrel relative to the housing; And a sensor unit fixed to the housing.

The camera module according to the embodiment can compensate for camera shake by driving the lens barrel with respect to the housing. That is, the driving unit relatively moves the lens barrel with respect to the housing to compensate for the shaking.

Particularly, in the camera module according to the embodiment, the lens assembly can cause the image sensor distortion to have a negative distortion. Accordingly, when the shake is corrected by the movement of the lens barrel, the error of the outer portion of the image can be minimized.

1 is a view showing a camera module according to an embodiment.
2 is a view showing an optical system including a lens assembly, an infrared cut filter unit, and a sensor unit.
FIG. 3 is a view showing an image formed on a sensor unit through a lens assembly. FIG.
4 is a diagram showing a distortion of an optical system including a lens assembly, an infrared cut filter portion and a sensor portion.
5 is a diagram showing the movement of the image caused by the hand shake and correction thereof.
6 is a view showing a camera module according to another embodiment.
7 is a view showing a camera module according to another embodiment.

In the description of the embodiments, it is to be understood that each lens, unit, section, hole, projection, groove or layer may be referred to as being "on" or "under" each lens, unit, Quot; on " and " under " include both being formed "directly" or "indirectly" . In addition, the upper or lower reference of each component is described with reference to the drawings. The size of each component in the drawings may be exaggerated for the sake of explanation and does not mean the size actually applied.

1 is a view showing a camera module according to an embodiment. 2 is a view showing an optical system including a lens assembly, an infrared cut filter unit, and a sensor unit. FIG. 3 is a view showing an image formed on a sensor unit through a lens assembly. FIG. 4 is a diagram showing a distortion of an optical system including a lens assembly, an infrared cut filter portion and a sensor portion. 5 is a diagram showing the movement of the image caused by the hand shake and correction thereof.

1 to 5, a camera module according to an embodiment includes a lens barrel 100, a lens assembly 200, a first elastic member 310, a second elastic member 320, a first housing 410, A second housing 420, an IR cut filter unit 500, a sensor unit 600, a circuit board 800, and drivers 710, 720, 730 and 740.

The lens barrel 100 receives the lens assembly 200. The lens barrel 100 may include a receiving groove for receiving the lens assembly 200. The receiving groove may have a shape corresponding to the lens assembly 200.

The lens barrel 100 may have a rectangular tube shape or a cylindrical shape. That is, the outer periphery of the lens barrel 100 may have a rectangular shape or a circular shape.

The lens barrel 100 is connected to the first housing 410. More specifically, the lens barrel 100 is connected to the first housing 410 through the first elastic member 310. That is, the lens barrel 100 may be connected to the first housing 410 by the first elastic member 310 to be movable.

In addition, the lens barrel 100 may include a light entrance opening upward (on the object side). The light input groove exposes the lens assembly 200. An image is incident on the lens assembly 200 through the light-entering grooves.

The lens assembly 200 is disposed in the lens barrel 100. More specifically, the lens assembly 200 is disposed in the receiving groove. The lens assembly 200 is inserted into the receiving groove. The lens assembly 200 may have a circular outer shape. More specifically, the lens assembly 200 may have a circular shape when viewed from the top side. Alternatively, the lens assembly 200 may have a rectangular shape when viewed from the top side.

The lens assembly 200 includes a plurality of lenses 210, 220, 230, and 240. For example, the lens assembly 200 may include a first lens 210, a second lens 220, a third lens 230, and a fourth lens 240. The third lens 230, the second lens 220, and the first lens 210 may be sequentially stacked.

Also, a first spacer and a second spacer may be interposed between the lenses 210, 220, 230, and 240. The first spacer and the second spacer may separate the intervals between the lenses 210, 220, 230, and 240 from each other.

In the above description, the lens assembly 200 includes four lenses. However, the present invention is not limited thereto. That is, the lens assembly 200 may include one to three lenses or may include five or more lenses.

Referring to FIG. 2, the lens assembly 200, the IR cut filter unit 500, and the sensor unit 600 constitute an optical system.

The first lens 210, the second lens 220, the third lens 230, and the fourth lens 240 are sequentially arranged from the object side to the image side. In order to acquire an object image, light corresponding to the image information of the object is incident on the first lens 210, the second lens 220, the third lens 230, the fourth lens 240, 500, and is incident on the sensor unit 600.

The first lens 210 has a positive refractive power and the second lens 220 has a negative refractive power and the third lens 230 has a positive refractive power, , And the fourth lens 240 may have a negative refracting power. The first lens 210, the second lens 220, the third lens 230, and the fourth lens 240 may be formed of glass or plastic.

The object side surface R1 of the first lens 210 may be convex and the upper surface R2 of the first lens 210 may be convex or concave or planar. In addition, the object side surface R1 of the first lens 210 may be an aspherical surface or a spherical surface. The first lens 210 preferably has a convex shape in the vicinity of the optical axis.

The curvature of the upper surface R2 of the first lens 210 may satisfy the following equation (1).

Equation 1

0 < R &lt; 0.01

More specifically, the curvature of the upper surface R2 of the first lens 210 may satisfy the following equation (2).

Equation 7

0? R <0.001

More specifically, the curvature of the upper surface R2 of the first lens 210 may be zero.

That is, the upper surface R2 of the first lens 210 has a very small curvature. The upper surface R2 of the first lens 210 may include a plane. The upper surface R2 of the first lens 210 may be a flat surface or a surface that is nearly planar. Since the upper surface R2 of the first lens 210 is close to the plane, the tolerance of the small optical system according to the embodiment can be reduced.

The second lens 220 may have a meniscus shape. The object side surface R3 of the second lens 220 is concave and the upper surface R4 of the second lens 220 is concave. That is, the second lens 220 may have a concave shape. In addition, the object side surface R3 and the upper surface R4 of the second lens 220 may be spherical or aspherical. The second lens 220 preferably has a meniscus shape with a concave surface toward the object side.

The third lens 230 has a convex surface on the image side in the vicinity of the optical axis, and has a positive power. The object-side surface of the third lens 230 may be, for example, a concave surface in the vicinity of the optical axis.

The object side surface R5 of the third lens 230 is concave and the upper surface R6 of the third lens 230 is convex. In addition, the object side surface R5 and the upper side surface R6 of the third lens 230 may be spherical or aspherical.

The focal length of the third lens 230 may satisfy the following equation (2).

Equation 2

0.5 < f3 / F < 1.0

Here, f3 is the effective focal length of the third lens 230, and F is the total focal length of the small optical system according to the embodiment.

More specifically, the focal length of the third lens 230 can satisfy the following equation (4).

Equation 4

0.6 < f3 / F < 0.9

The fourth lens 240 may have a meniscus shape. The object side surface R7 of the fourth lens 240 is convex and the upper surface R8 of the fourth lens 240 can be concave. In addition, the object side surface R7 and the upper surface R8 of the fourth lens 240 may be aspherical.

In addition, the fourth lens 240 is formed to include at least one aspherical surface inflection point.

At this time, one or more aspherical surface inflection points may be formed on the object side surface R7 of the fourth lens 240. [ At least one aspherical inflection point CP may be formed on the upper surface R8 of the fourth lens 240. [ The aspheric inflection point formed in the fourth lens 240 can adjust the maximum emission angle of the principal ray incident on the light receiving element 70.

The focal length of the fourth lens 240 may satisfy the following equation (3).

Equation 3

-10 < f4 / F < -0.5

Here, f4 is the effective focal length of the fourth lens 240, and F is the total focal length of the small optical system according to the embodiment.

More specifically, the focal length of the fourth lens 240 can satisfy the following equation (5).

Equation 5

-1 < f4 / F < -0.5

When the light receiving element 70 which is the image surface R11 is a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor, there is an angle at which the amount of light is secured in each pixel. The shading of the periphery of the screen appears.

Therefore, by forming an aspheric inflection point on the upper surface R8 of the fourth lens 240 to adjust the maximum emission angle of the principal ray, it is possible to prevent the peripheral portion of the screen from becoming dark.

The optical system can satisfy the following expression (6).

Equation 6

1 < ttl / F < 1.3

Here, ttl is the distance from the object-side surface to the image-side surface of the first lens 210, and F is the total effective focal length.

When the optical system is designed as described above, the optical system may have a negative distortion. That is, as shown in Figs. 3 and 4, the optical system may have a negative distortion.

For example, in the optical system, when the field height is 0F to 1.0F, the distortion of the image on the sensor unit 600 may be 0% to -2%.

More specifically, in the optical system, when the field height is 0.7 F to 1.0 F, the distortion of the image on the sensor unit 600 may be 0% to -2%.

Alternatively, in the optical system, when the field height is 0F to 1.0F, the distortion of the image on the sensor unit 600 may be -2% to -5%.

More specifically, in the optical system, when the field height is 0.7 F to 1.0 F, the distortion of the image on the sensor unit 600 may be -2% to -5%.

The first elastic member 310 is disposed in the first housing 410. The first elastic member 310 is fixed to the first housing 410. The first elastic member 310 is fixed to the barrel 100 of the first lens 210. The first elastic member 310 fixes the lens barrel 100 to the first housing 410 so as to be movable.

The first elastic member 310 may include a spring or the like. More specifically, the first elastic member 310 may include a plate spring.

The first housing 410 receives the lens barrel 100. The first housing 410 is connected to the lens barrel 100 through the first elastic member 310.

The first housing 410 may be formed of plastic or metal. The first housing 410 may have a rectangular tubular shape.

The second housing 420 receives the first housing 410. That is, the first housing 410 is disposed in the second housing 420. The first housing 410 and the second housing 420 are connected to each other by the second elastic member 320.

The first housing 410 is fixed in the second housing 420 to be movable by the second elastic member 320. That is, the first housing 410 may be disposed in the second housing 420 in a floating state.

The second housing 420 is fixed to the circuit board 800. The second housing 420 may be fastened to the circuit board 800. The second housing 420 may be formed of metal or plastic.

The second elastic member 320 is connected to the first housing 410 and the second housing 420. The second elastic member 320 fixes the first housing 410 to be movable in the second housing 420. The second elastic member 320 may include a spring or the like. More specifically, the second elastic member 320 may include a plate spring.

The infrared cut-off filter unit 500 is disposed in the second housing 420. The infrared cutoff filter unit 500 may be fixed to the circuit board 800 and fixed to the second housing 420. The infrared cut filter unit 500 filters incident infrared rays. The infrared cut-off filter unit 500 can block light of an excessively long wavelength entering the sensor unit 600.

The infrared cut-off filter unit 500 may be formed by alternately depositing titanium oxide and silicon oxide on an optical glass. In order to block the infrared rays, the thickness of the titanium oxide and the silicon oxide can be appropriately adjusted.

The sensor unit 600 is accommodated in the second housing 420. The sensor unit 600 includes a CCD image sensor or a CMOS image sensor. The sensor unit 600 further includes a circuit board 800 connected to the image sensor. The sensor unit 600 converts an incident image into an electrical signal.

The sensor unit 600 is fixed to the circuit board 800. The sensor unit 600 may be mounted on the circuit board 800. The sensor unit 600 is electrically connected to the circuit board 800.

The size of the sensing region of the sensor unit 600 may be 2.5 mm x 4.0 mm. In addition, the horizontal and vertical sizes of the unit pixel of the sensor unit 600 may be less than 2 탆.

The circuit board 800 may cover the bottom of the second housing 420. The circuit board 800 is coupled to the second housing 420. The circuit board 800 may be a printed circuit board (PCB) 800. The circuit board 800 may be electrically connected to the sensor unit 600. The circuit board 800 may apply a signal for driving the sensor unit 600. In addition, the circuit board 800 can receive a signal from the sensor unit 600. FIG.

The sensor unit 600 is mounted on the circuit board 800. More specifically, the sensor unit 600 may be fixed to the circuit board 800. That is, the sensor unit 600 may be fixed to the second housing 420 through the circuit board 800.

Also, the circuit board 800 may be electrically connected to the driving units 710, 720, 730, and 740. That is, signals for driving the driving units 710, 720, 730, and 740 may be applied to the driving units 710, 720, 730, and 740 through the circuit board 800.

The driving units 710, 720, 730, and 740 drive the lens barrel 100 with respect to the first housing 410. The driving units 710, 720, 730 and 740 drive the first housing 410 with respect to the second housing 420.

The driving units 710, 720, 730 and 740 can move the lens barrel 100 and the first housing 410 by a magnetic force. The driving units 710, 720, 730 and 740 may include a first driving unit 710, a second driving unit 720, a third driving unit 730 and a fourth driving unit 740. The driving units 710, 720, ... can move the lens barrel 100 relative to the housing 400 by a magnetic force. At this time, the magnetic force may act in a direction that tilts with respect to the optical axis OA of the lens assembly 200.

The first driving unit 710 is attached to the lens barrel 100. The first driving unit 710 may be fixed to the lens barrel 100. The first driving unit 710 may be disposed outside the lens barrel 100.

The first driving unit 710 may include a coil. The first driving unit 710 may receive a driving signal through the circuit board 800. The first driving unit 710 can generate a magnetic field by an electrical signal.

The first driving unit 710 may apply an attractive force or a repulsive force to the second driving unit 720 in a direction inclined with respect to the reference horizontal plane. At this time, the first driving unit 710 may apply a magnetic force to the second driving unit 720 at an angle of about + 20 ° to + 70 ° with respect to the reference horizontal plane. More specifically, the first driving unit 710 may apply a magnetic force to the second driving unit 720 at an angle of about + 30 ° to + 50 ° with respect to the reference horizontal plane R.

The second driving unit 720 is attached to the first housing 410. More specifically, the second driving unit 720 may be fixed to the first housing 410. More specifically, the second driving unit 720 may be fixed to the inside of the first housing 410.

The second driving unit 720 includes a magnetic body. The second driving unit 720 may have a plate shape. That is, the second driving unit 720 may be a plate-shaped magnet.

The first driving unit 710 and the second driving unit 720 are adjacent to each other. The first driving unit 710 and the second driving unit 720 may be spaced apart at very small intervals. The interval between the first driving unit 710 and the second driving unit 720 may be about 50 탆 to about 1000 탆. The first driving unit 710 and the second driving unit 720 may be opposed to each other. Accordingly, a magnetic force can be generated between the first driving unit 710 and the second driving unit 720.

The first driving unit 710 and the second driving unit 720 relatively move the lens barrel 100 relative to the first housing 410. More specifically, the first driving unit 710 and the second driving unit 720 move the lens barrel 100 relative to the first housing 410 in the optical axis direction of the lens assembly 200 .

The third driving unit 730 is attached to the first housing 410. More specifically, the third driving unit 730 may be fixed to the first housing 410. More specifically, the third driving unit 730 may be fixed to the outer side of the first housing 410.

The third driving unit 730 includes a magnetic body. The third driving unit 730 may have a plate shape. That is, the third driving unit 730 may be a plate-shaped magnet.

The fourth driving unit 740 is attached to the second housing 420. More specifically, the fourth driving unit 740 is fixed to the second housing 420. The fourth driving unit 740 may be disposed inside the second housing 420.

The fourth driving unit 740 may include a coil. The fourth driving unit 740 may receive a driving signal through the circuit board 800. The fourth driving unit 740 can generate a magnetic field by an electrical signal.

The third driving unit 730 and the fourth driving unit 740 are adjacent to each other. The third driving unit 730 and the fourth driving unit 740 may be spaced apart at a very small interval. The distance between the third driving unit 730 and the fourth driving unit 740 may be about 50 탆 to about 1000 탆. The third driving unit 730 and the fourth driving unit 740 may be opposed to each other. Accordingly, a magnetic force can be generated between the third driving unit 730 and the fourth driving unit 740.

The third driving unit 730 and the fourth driving unit 740 relatively move the first housing 410 relative to the second housing 420. More specifically, the third driving unit 730 and the fourth driving unit 740 are coupled to the first housing 410 in a horizontal direction with respect to the optical axis of the lens assembly 200 with respect to the second housing 420, Can be moved relative to each other.

As a result, the driving units 710, 720, 730, and 740 can move the lens assembly 200 relative to the sensor unit 600 in a direction parallel to the optical axis and the optical axis.

The first housing 410 can be tilted or horizontally moved by the third driving unit 730 and the fourth driving unit 740 when the subject is moved in the horizontal direction by the shake . Accordingly, the horizontal relative positions between the lens assembly 200 and the sensor unit 600 can be adjusted to each other.

The focal length between the lens assembly 200 and the sensor unit 600 can be adjusted by the first driving unit 710 and the second driving unit 720.

In particular, since the optical system has a negative distortion, the movement of the image due to shaking in the horizontal direction is minimized, and the correction error can be reduced accordingly.

That is, as shown in FIG. 5, when the image is moved in the sensor unit 600 by the shake of the camera module according to the present embodiment, the driving units 710, 720, 730, (100) in the opposite direction to the direction of movement of the image. For example, the driving units 710, 720, 730, and 740 move the lens barrel 100 horizontally or tilted to return the movement of the image due to the shaking.

At this time, since the optical system has a negative distortion, an error of an image due to the movement of the lens barrel 100 can be minimized at an outer portion of the image.

That is, since the optical system of the camera module according to the present embodiment has a negative distortion, the farther away from the optical axis, the larger the distance that the image is moved in accordance with the shake can be prevented.

Particularly, the camera module according to the present embodiment can minimize image blurring in the outer portion of the imaging area and maximize the blurring correction effect.

6 is a view showing a camera module according to another embodiment. In the present embodiment, the camera module described above is referred to. That is, the description of the camera module in the previous embodiment can be essentially combined with the description of the present embodiment except for the changed portions.

Referring to FIG. 6, the first housing 410 of the camera module according to the present embodiment may be omitted. Further, the lens barrel 100 can be directly connected to the second housing 420 through the elastic member. At this time, the elastic member may connect the lens barrel 100 and the second housing 420 in a direction inclined with respect to the optical axis of the lens assembly 200.

A first driving unit 710 is attached to the lens barrel 100. The first driving unit 710 may include a magnetic body.

A fourth driving unit 740 is attached to the inside of the second housing 420. The fourth driving unit 740 may include a coil.

A fifth driving unit 750 is mounted on the circuit board 800. More specifically, the fifth driver 750 may be interposed between the first driver 710 and the circuit board 800. The fifth driving unit 750 may include a coil.

The fourth driving unit 740 and the fifth driving unit 750 may be electrically connected to the circuit board 800.

The lens barrel 100 may be driven in a horizontal direction perpendicular to the optical axis by a magnetic force between the first driving unit 710 and the fourth driving unit 740. The lens barrel 100 may be driven in the optical axis direction by a magnetic force between the first driving unit 710 and the fifth driving unit 750.

That is, the lens barrel 100 can be driven in the horizontal direction by the first driving unit 710 and the fourth driving unit 740. In addition, the lens barrel 100 can be driven in the optical axis direction by the first driving unit 710 and the fifth driving unit 750.

The camera module according to the present embodiment has a simple structure and can perform shake correction and automatic focus adjustment.

7 is a view showing a camera module according to another embodiment. In the present embodiment, the camera modules described above are referred to. That is, the description of the camera modules in the foregoing embodiment can be essentially combined with the description of the present embodiment except for the changed portions.

Referring to FIG. 7, in the camera module according to the present embodiment, the third driving unit 730 may be omitted, and the fourth driving unit 740 may be adjacent to the second driving unit 720. More specifically, the fourth driving unit 740 may be interposed between the second driving unit 720 and the circuit board 800.
In an embodiment, the second driving unit 720 may be a magnet. For example, the magnet may be in the form of a plate (see paragraph [0092]). Accordingly, the magnet may include a lower surface, an upper surface, and side surfaces.
The first driving unit 710 may include a first coil (see paragraph). Also, the first coil as the first driving unit 710 and the magnet as the second driving unit 720 may be opposed to each other (see paragraph). Accordingly, the side surfaces of the magnet, which is the second driving portion 720, may include a first side facing the first coil, which is the first driving portion 719, and a second side disposed opposite the first side, The upper surface of the magnet may overlap the upper wall of the first housing 410 in the vertical direction.
In an embodiment, the fourth driver 740 may include a second coil (see paragraph). Also, in the embodiment, the first coil as the first driving unit 710 and the second coil as the fourth driving unit 740 may share the magnets of the second driving unit 720 with each other (see paragraph) .
Thus, in an embodiment, the first coil may face the first side of the magnet in the horizontal direction. The second coil may face the lower surface of the magnet in the vertical direction so that the first coil and the second coil share the magnet.
In an embodiment, the first side of the magnet may meet both the lower surface of the magnet and the upper surface of the magnet (see paragraph).
In an embodiment, the second housing 420 may be secured to the circuit board 800 (see paragraph). The second coil, which is the fourth driving unit 740, may be interposed between the magnet, which is the second driving unit 720, and the circuit board 800 (see paragraph).
Accordingly, the second coil may be disposed between the magnet and the second housing 420 in the vertical direction, and the second coil may be disposed lower than the bottom surface of the barrel 100.
The first driving unit 710 and the second driving unit 720 may be opposed to each other and a magnetic force may be generated between the first coil as the first driving unit 710 and the magnet as the second driving unit 720 (See paragraph [0093]).
At this time, in the vertical direction, the vertical width of the first side of the magnet may be larger than the vertical width of the area of the first coil disposed in the barrel 100 facing the first side of the magnet .
7, the first housing 410 may be driven by the magnetic force between the magnet that is the second driving unit 720 and the second coil that is the fourth driving unit 740 (see the paragraph ).
In this case, in the horizontal direction, a horizontal width between the first side of the magnet and the second side of the magnet is larger than a horizontal width of the second coil disposed on the second housing (420) May be smaller than the horizontal width of the region.
As described above, the horizontal width between the first side and the second side of the magnet, which is the second driving unit 720, is the horizontal width of the area of the second coil which is the fourth driving unit 740 facing the lower surface of the magnet Lt; / RTI &gt; Accordingly, the horizontal width of the area of the second coil, which is the fourth driving unit 740, may be larger than the horizontal width between the first side and the second side of the magnet, which is the second driving unit 720.
For example, the upper surface of the second coil, which is the fourth driving unit 740, may include a first portion, a second portion, and a third portion arranged in a horizontal direction. At this time, the first portion of the second coil may overlap with the side wall of the first housing 410 in the vertical direction. In addition, the second portion of the second coil may overlap the lower surface of the magnet in the vertical direction. The third portion of the second coil may overlap the upper wall of the first housing 410 in the vertical direction and may not overlap with the magnet.
7, in the embodiment, the center of the first coil, which is the first driving unit 710 in the vertical direction, is positioned at the initial position of the barrel 100 before the driving signal is applied, Can be positioned lower than the center of the magnet, which is the second driving unit 720.

Accordingly, the first housing 410 can be relatively moved by the repulsive force or attraction force between the second driving unit 720 and the fourth driving unit 740. More specifically, the lens barrel 100 is driven by a repulsive force or attraction force between the first driving unit 710 and the second driving unit 720, and the first housing 410 is driven by the second driving unit 720 and the second driving unit 720, And the fourth driving unit 740, as shown in FIG. That is, the first driving unit 710 and the fourth driving unit 740 may share the second driving unit 720 with each other.

Accordingly, the camera module according to the present embodiment can omit the third driver 730, reduce the number of required components, and have a simple structure.

In addition, the features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects and the like illustrated in the embodiments can be combined and modified by other persons skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (22)

A housing including a first housing and a second housing disposed under the first housing;
A barrel disposed within said first housing;
A first elastic member connecting the barrel and the first housing such that the barrel is relatively moved in a direction perpendicular to the first housing;
A first coil disposed on an outer surface of the barrel;
A magnet disposed on an inner surface of the side wall of the first housing and acting with the first coil to relatively move the barrel and the first coil in the vertical direction with respect to the first housing;
A second coil operative with the magnet to move the first housing and the magnet so that the barrel is moved in a horizontal direction relative to the second housing;
/ RTI &gt;
Wherein the first housing includes a top wall and the vertically extending sidewalls from the top wall,
The magnet includes a lower surface, an upper surface, and side surfaces,
Said side surfaces of said magnet including a first side facing said first coil and a second side disposed opposite said first side,
The upper surface of the magnet overlaps with the upper wall of the first housing in the vertical direction,
Wherein the first coil faces the first side face of the magnet in the horizontal direction and the first coil and the second coil share the magnet and the second coil faces the lower face of the magnet in the vertical direction In the face,
Wherein the first side of the magnet meets both the lower surface of the magnet and the upper surface of the magnet,
The second coil is disposed between the magnet and the second housing in the vertical direction and the second coil is disposed lower than the bottom surface of the barrel,
The vertical width of the first side of the magnet is larger than the vertical width of the area of the first coil disposed in the barrel facing the first side of the magnet,
Wherein a horizontal width between the first side of the magnet and the second side of the magnet in the horizontal direction is greater than a horizontal width of a region of the second coil disposed on the second housing facing the lower surface of the magnet Lt; / RTI &gt; The method according to claim 1,
The magnet has a plate shape,
Wherein the first coil is fixed to the outer surface of the barrel,
The second housing supports the second coil,
And the second coil overlaps the magnet in the vertical direction. The method according to claim 1,
Wherein the first coil and the magnet are used to perform a focus function,
By the operation of the focus function, the barrel and the first coil are relatively moved in the vertical direction with respect to the upper wall of the first housing
Wherein the magnet and the second coil are used to perform a shake compensation function,
By the operation of the shake compensation function, the first housing and the magnet are relatively moved with respect to the second housing in the horizontal direction,
The second side of the magnet is coupled to the inner side of the side wall of the first housing,
Wherein the magnet and the first coil are disposed below the upper wall of the first housing. The method according to claim 1,
And the second coil is fixed to the second housing. The method according to claim 1,
And a second elastic member coupled to the first housing and coupled to the second housing. 6. The method of claim 5,
Wherein a coupling region between the second elastic member and the first housing is provided in an upper region of the first housing and is positioned higher than the upper face of the magnet. The method according to claim 1,
The second housing including an opening disposed below the barrel in the vertical direction,
Light incident from a subject is transmitted through the barrel and the opening,
The magnet facing and facing the second housing in the vertical direction,
And the first side surface of the magnet is perpendicular to the lower surface of the magnet. The method according to claim 1,
Wherein the first coil and the magnet are spaced apart by 50 mu m to 1000 mu m in the horizontal direction,
And the second coil and the magnet are spaced apart by 50 占 퐉 to 1000 占 퐉 in the vertical direction. The method according to claim 1,
And the region of the first coil is positioned between the upper surface of the magnet and the lower surface of the magnet when viewed in the horizontal direction. The method according to claim 1,
And the lower surface of the magnet is positioned between both ends of the region of the second coil when viewed in the vertical direction. The method according to claim 1,
Wherein the center of the first coil in the vertical direction is positioned lower than the center of the magnet in the vertical direction at an initial position of the barrel before the drive signal is applied. The method according to claim 1,
The upper surface of the second coil includes a first portion, a second portion, and a third portion arranged in a horizontal direction,
The first portion of the second coil facing and overlapping the sidewall of the first housing in the vertical direction,
Said second portion of said second coil facing and overlapping said lower surface of said magnet in said vertical direction,
Wherein the third portion of the second coil overlaps with the top wall of the first housing in the vertical direction and does not overlap with the magnet. The method according to claim 1,
Wherein at least a portion of the second coil faces the first housing in the vertical direction and overlaps the first housing. A housing including a first housing and a second housing disposed under the first housing;
A barrel disposed within the housing;
A first elastic member fixed to the barrel and the first housing such that the barrel is relatively moved in a direction perpendicular to the first housing;
A first driving unit for relatively moving the barrel relative to the housing;
A second driving unit for relatively moving the first housing relative to the second housing;
Lt; / RTI &gt;
Wherein the first housing includes a top surface and a side surface extending in the vertical direction from the top surface,
Wherein the first driving unit includes a first coil and a magnet, and the second driving unit includes a second coil and the magnet,
The magnet includes a lower surface, an upper surface, and side surfaces,
Said side surfaces of said magnet including a first side facing said first coil and a second side disposed opposite said first side,
The upper surface of the magnet overlaps with the upper surface of the first housing in the vertical direction,
Wherein the first coil faces the first side of the magnet in the horizontal direction, the first coil and the second coil share the magnet,
Wherein the first side of the magnet meets both the lower surface of the magnet and the upper surface of the magnet,
The second coil is disposed between the magnet and the second housing in the vertical direction and the second coil is disposed lower than the bottom surface of the barrel,
The vertical width of the first side of the magnet is larger than the vertical width of the area of the first coil disposed in the barrel facing the first side of the magnet,
Wherein a horizontal width between the first side of the magnet and the second side of the magnet in the horizontal direction is greater than a horizontal width of a region of the second coil disposed on the second housing facing the lower surface of the magnet Lt; / RTI &gt; 15. The method of claim 14,
The second housing supports the second coil,
The second coil overlaps the magnet in the vertical direction,
And the second side of the magnet is coupled to an inner surface of the side surface of the first housing. A housing including a first housing and a second housing disposed under the first housing;
A barrel disposed within said first housing;
A first elastic member connecting the barrel and the first housing such that the barrel is relatively moved in a direction perpendicular to the first housing;
A first coil disposed on an outer surface of the barrel;
A magnet disposed on an inner surface of the side wall of the first housing and acting with the first coil to relatively move the barrel and the first coil in the vertical direction with respect to the first housing;
A second coil operative with the magnet to move the first housing and the magnet so that the barrel is moved in a horizontal direction relative to the second housing;
A lens assembly disposed within the barrel;
An image sensor disposed below the second housing;
Lt; / RTI &gt;
Wherein the first housing includes a top wall and the vertically extending sidewalls from the top wall,
The magnet includes a lower surface, an upper surface, and side surfaces,
Said side surfaces of said magnet including a first side facing said first coil and a second side disposed opposite said first side,
The upper surface of the magnet overlaps with the upper wall of the first housing in the vertical direction,
Wherein the first coil faces the first side face of the magnet in the horizontal direction and the first coil and the second coil share the magnet and the second coil faces the lower face of the magnet in the vertical direction In the face,
Wherein the first side of the magnet meets both the lower surface of the magnet and the upper surface of the magnet,
The second coil is disposed between the magnet and the second housing in the vertical direction and the second coil is disposed lower than the bottom surface of the barrel,
The vertical width of the first side of the magnet is larger than the vertical width of the area of the first coil disposed in the barrel facing the first side of the magnet,
Wherein a horizontal width between the first side of the magnet and the second side of the magnet in the horizontal direction is greater than a horizontal width of a region of the second coil disposed on the second housing facing the lower surface of the magnet A smaller lens driving device,
. 17. The method of claim 16,
Wherein the lens assembly includes four lenses,
Of the four lenses, the fourth lens positioned fourth from the object side has a meniscus shape,
And the fourth lens has an aspheric inflection point. 17. The method of claim 16,
The distance between the second coil and the image sensor is kept constant under the operation of the shake compensation function,
Wherein a width of a unit cell of the image sensor is 2 占 퐉 or less or a length of the unit cell is 2 占 퐉 or less. An information communication apparatus comprising a camera module according to any one of claims 16 to 18. delete delete delete

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