Camera module

Abstract

To provide a camera module that effectively prevents camera shake.SOLUTION: A lens driving device comprises: a housing including a first housing and a second housing; a barrel disposed in the first housing; a first elastic member connecting the barrel and the first housing; a first coil disposed outside the barrel; a magnet that is disposed on an inner surface of a side wall of the first housing and faces the first coil; and a second coil disposed between the magnet and the second housing. The second coil faces an undersurface of the magnet. The second coil interacts with the magnet, and moves the first housing and the magnet so that the first housing moves relative to the second housing in a horizontal direction. The width of the magnet is smaller than the width of the second coil. A portion of the second coil is disposed between the side wall of the first housing and the second housing. The length of the magnet is greater than the length of the first coil.SELECTED DRAWING: Figure 7

Description

Technical Field

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[0001] The present invention relates to a camera module.

Background Art

[0002] Currently, camera modules are mounted in the production of mobile communication terminals, IT devices such as PDAs and MP3 players, automobiles, and endoscopes. As the technology of such camera modules develops from the existing 300,000 pixels (VGA level), it is developing towards high pixels. At the same time, miniaturization and thinning are being promoted according to the mounting object, and various additional functions such as auto focusing (AF) and optical zoom (OPTICAL ZOOM) are being realized at low manufacturing costs. are being changed to be possible.

[0003] In addition, the currently produced camera modules are made of image sensor modules produced by wire bonding method (COB; Chip On Board), flip chip method (COF; Chip Of Flexible), and chip scale package method (CSP; Chip Scale Pakage), and are mainly configured to be connected to the main board through electrical connection means such as printed circuit boards (PCBs) and flexible printed circuit boards (FPCBs). are configured in a form that is connected to the main board.

[0004] However, recently, similar to general passive components, a camera module that can be directly mounted on the main board has been demanded by users in order to simplify the manufacturing process and reduce the manufacturing cost.

[0005] Such camera modules mainly use image sensors such as CCDs and CMOSs as wires​​ Manufactured with the components attached to the substrate by yard bonding or flip-chip method. The image sensor collects light from objects to create an image of them inside and outside the camera module. The data is stored in the device's memory, and the stored data is converted into an electrical signal within the device. It is displayed as an image through a display medium such as an LCD or PC monitor. ru.

[0006] Conventional camera modules convert the video signal that enters through the lens into an electrical signal. A housing in which an image sensor is supported at the bottom, and the image of a subject is transmitted to the image sensor. By sequentially coupling a group of lenses that collect signals with a barrel in which the group of lenses is stacked inside, It is composed.

[0007] In this case, an image sensor consisting of a CCD or CMOS is placed in the lower part of the housing. A mounting board on which capacitors and resistors, which are electrical components used for driving the device, are attached. The FPCBs are electrically coupled.

[0008] Conventional camera modules configured in this way have a large number of rotations on the mounting board (FPCB). With the circuit components mounted, an anisotropic conductive film (ACF) is placed between the substrate and the image sensor. Insert an Anisotropic Conductive Film and apply heat and pressure to bond and secure it to conduct electricity. Then, an infrared blocking filter is attached to the opposite side.

[0009] Furthermore, the barrel and housing, which house a large number of lenses, are temporarily connected by screw connections. In this state, as mentioned above, the pre-assembled mounting board is attached separately to the bottom surface of the housing. It is fixed in place by an adhesive.

[0010] On the one hand, a housing in which a mounting substrate to which the image sensor is attached and a barrel are coupled After the adhesion and fixation of the housing, an object (resolution chart) is placed in front of the barrel at a certain distance for focusing Adjustment is to be made. However, the focus adjustment of the camera module is achieved by adjusting the vertical transfer amount caused by the rotation of the barrel screwed to the housing so that the focus adjustment between the lens group and the image sensor is made Summary of the Invention Problems to be Solved by the Invention

[0011] An object of the present invention is to provide a camera module that effectively prevents camera shake Means for Solving the Problems

[0012] A camera module according to an embodiment includes a housing, a lens barrel that houses a lens assembly including one or more lenses disposed within the housing, an elastic member fixed to the housing and the lens barrel, a driving unit that relatively moves the lens barrel with respect to the housing, and a sensor unit fixed to the housing Advantages of the Invention

[0013] The camera module according to the embodiment can drive the lens barrel with respect to the housing to compensate for shake. That is, the driving unit can relatively move the lens barrel with respect to the housing to compensate for shake

[0014] In particular, the camera module according to the embodiment can, by the lens assembly, connect to the sensor unit ​​​​​​The image to be projected can have negative distortion. By this, when the shake is corrected by the movement of the lens barrel, the error in the outer edge portion of the image can be minimized.

Brief Description of the Drawings

[0015] [Figure 1] FIG. showing a camera module according to an embodiment of the present invention. [Figure 2] FIG. showing an optical system including a lens assembly, an infrared cut filter section, and a sensor section. [Figure 3] FIG. showing that an image incident on the sensor section through the lens assembly is formed. [Figure 4] FIG. showing the distortion of an optical system including a lens assembly, an infrared cut filter section, and a sensor section. [Figure 5] FIG. showing the movement of an image due to camera shake and its correction. [Figure 6] FIG. showing a camera module according to another embodiment of the present invention. [Figure 7] FIG. showing a camera module according to still another embodiment of the present invention.

Modes for Carrying Out the Invention

[0016] In the description of the embodiments, when each lens, unit, part, hole, protrusion, groove, or layer, etc. is described as being formed “on” or “under” each lens, unit, part, hole, protrusion, groove, or layer, etc., “on” and “under” include all those formed “directly” or “indirectly” via other components. Also, the reference for the upper or lower part of each component is based on the drawings. ​​​​​​The following will be explained. The sizes of each component in the drawings may be exaggerated for illustrative purposes, and in reality... This does not indicate the applicable size.

[0017] Figure 1 shows a camera module according to an embodiment of the present invention. Figure 2 shows a lens This diagram shows the optical system including the gentian, infrared blocking filter section, and sensor section. This diagram shows how an image is formed when it enters the sensor through the lens assembly. Figure 4 shows the optical system including the lens assembly, infrared blocking filter section, and sensor section. This is a diagram showing distortion. Figure 5 is a diagram showing image movement due to camera shake and its correction. ru.

[0018] Referring to Figures 1 to 5, the camera module according to this embodiment has a lens barrel 100 Lens assembly 200, first elastic member 310, second elastic member 320, first housing 410, second housing 420, infrared blocking filter section 500, sensor section 600, circuit Includes a circuit board 800 and drive units 710, 720, 730, and 740.

[0019] The lens barrel 100 houses the lens assembly 200. The 100 may include a housing groove for accommodating the lens assembly 200. The receiving groove may have a shape corresponding to the lens assembly 200.

[0020] The lens barrel 100 can have a square tube or a cylindrical shape. The outer casing of the 100 barrel can be square or circular.

[0021] The lens barrel 100 is connected to the first housing 410. For more details, The lens barrel 100 is inserted into the first housing 410 through the first elastic member 310. They are connected. That is, the lens barrel 100 is connected to the first housing 410, the first bullet The fluid member 310 allows for connection in a fluid manner.

[0022] Furthermore, the lens barrel 100 includes a light-receiving groove that opens upward (towards the object). This is possible. The light-receiving groove exposes the lens assembly 200. Through the light-receiving groove Then, an image is incident on the lens assembly 200.

[0023] The lens assembly 200 is positioned within the lens barrel 100. The lens assembly 200 is positioned within the housing groove. 00 is inserted into the housing groove. The lens assembly 200 has a circular outer shape. It is possible. More specifically, the lens assembly 200 is circular when viewed from the top side. It can have a shape. In contrast, the lens assembly 200 is on the top side It can be seen as having a rectangle.

[0024] The aforementioned lens assembly 200 includes a number of lenses 210, 220, 230, and 240. For example, the lens assembly 200 comprises a first lens 210, a second lens 220, and a third lens 210. It may include lens 230, and a fourth lens 240. The third lens 230, the The second lens 220 and the first lens 210 can be stacked in order.

[0025] Furthermore, a first spacer and a second spacer are placed between the lenses 210, 220, 230, and 240. A spacer can be interposed. The first spacer and the second spacer are the lenses 210 and 220 The intervals between 230 and 240 can be made to be wider apart.

[0026] As described above, the lens assembly 200 includes four lenses, but is not limited to this. It is not the case that the lens assembly 200 includes one to three lenses. , or may contain five or more lenses.

[0027] Referring to Figure 2, the lens assembly 200, the infrared blocking filter section 500, The sensor unit 600 also constitutes an optical system.

[0028] The first lens 210, the second lens 220, the third lens 230, and the fourth Lens 240 is arranged sequentially from the object side upwards. Light corresponding to the video information is transmitted through the first lens 210, the second lens 220, and the third lens 23. 0, passing through the fourth lens 240 and the infrared blocking filter section 500 to the sensor section It is injected at 600.

[0029] The first lens 210 has a positive (+) refractive power, and the second lens 220 has The third lens 230 has a negative (-) refractive power, and the fourth lens has a positive (+) refractive power. Lens 240 can have negative (-) refractive power. Also, the first lens 210, front The second lens 220, the third lens 230, and the fourth lens 240 are made of glass or It can be formed from plastic.

[0030] The object side surface (R1) of the first lens 210 has a convex shape, and the upper The side surface (R2) can be convex, concave, or flat. Also, the first lens 210 The side surface (R1) of the object may be aspherical or spherical. The first lens 210 is near the optical axis. A biconvex shape is preferred.

[0031] The curvature of the upper surface (R2) of the first lens 210 can satisfy the following <Equation 1>. ru.

[0032] <Number 1> 0 ≤ R < 0.01

[0033] More specifically, the curvature of the upper surface (R2) of the first lens 210 satisfies the following <Equation 7> It is possible.

[0034] <Number 7> 0 ≤ R < 0.001

[0035] More specifically, the curvature of the upper surface (R2) of the first lens 210 can be 0.

[0036] That is, the upper surface (R2) of the first lens 210 has a very small curvature. The upper surface (R2) of the lens 210 may include a flat surface. The surface (R2) can be a flat surface or a nearly flat curved surface. Upper side surface of the first lens 210 Since (R2) is close to a plane, the tolerance of the compact optical system according to the embodiment can be reduced.

[0037] The second lens 220 may have a meniscus shape. The side surface (R3) of object 0 has a concave shape, and the upper surface (R4) of the second lens 220 has a concave shape. This is possible. That is, the second lens 220 can have a biconcave shape. The object side (R3) and upper side (R4) of the second lens 220 can be spherical or aspherical. The second lens 220 is preferably a meniscus shape with the concave surface facing the object.

[0038] The third lens 230 has a convex upper surface near the optical axis and possesses positive power. The object-side surface of the third lens 230 may be concave, for example, near the optical axis. ru.

[0039] The object side (R5) of the third lens 230 has a concave shape, and the upper part of the third lens 230 The side surface (R6) may have a convex shape. Also, the side surface of the third lens 230 ( R5) and the upper surface (R6) can be spherical or aspherical.

[0040] The focal length of the third lens 230 can satisfy the following equation 2.

[0041] 0.5 <f3 / F<1.0

[0042] Here, f3 is the effective focal length of the third lens 230, and F is the small size according to the embodiment. This is the total focal length of the optical system.

[0043] More specifically, the focal length of the third lens 230 can satisfy the following <Equation 4>. Cut.

[0044] 0.6 <f3 / F<0.9

[0045] The fourth lens 240 may have a meniscus shape. The side surface (R7) of the object has a convex shape, and the upper surface (R8) of the fourth lens 240 has a concave shape. It can have. Also, the object side (R7) and upper side (R8) of the fourth lens 240 ) can be aspherical.

[0046] Furthermore, the fourth lens 240 is formed to include at least one aspherical inflection point. ru.

[0047] In this case, one or more aspherical inflection points are formed on the object side (R7) of the fourth lens 240. Furthermore, one or more aspherical inflection points (CP) are provided on the upper surface (R8) of the fourth lens 240. The aspherical inflection point formed on the fourth lens 240 enters the photodetector 70. The maximum emission angle of the main beam can be adjusted.

[0048] The focal length of the fourth lens 240 can satisfy the following equation 3.

[0049] -10 <f4 / F<-0.5

[0050] Here, f4 is the effective focal length of the fourth lens 240, and F is the small size according to the embodiment. This is the total focal length of the optical system.

[0051] More specifically, the focal length of the fourth lens 240 can satisfy the following <Equation 5>. Cut.

[0052] <Number 5> -1 <f4 / F<-0.5

[0053] The light-receiving element 70, which is the upper surface (R11), is a CCD (Charge Coupled Device) or C In the case of a MOS (Complementary Metal Oxide Semiconductor) sensor, light reaches each pixel. There is an angle at which sufficient light is secured, and if the angle is different, the amount of light is not secured, so the edges of the screen... The phenomenon of darkening (shading) appears.

[0054] Therefore, an aspherical inflection point is formed on the upper surface (R8) of the fourth lens 240, and the principal ray By adjusting the maximum emission angle, it is possible to prevent the phenomenon of the edges of the screen becoming darker. Cut.

[0055] The aforementioned optical system can satisfy the following <Equation 6>.

[0056] 1 <ttl / F<1.3

[0057] Here, ttl is the distance from the side surface to the upper surface of the object of the first lens 210, and F is This is the total effective focal length.

[0058] When the optical system is designed as described above, the optical system has negative distortion. This is possible. That is, as shown in Figures 3 and 4, the optical system has negative distortion. It can have.

[0059] For example, in the optical system, the field height is from 0F to 1.0F In this case, the distortion of the image from the sensor unit 600 may be between 0% and -2%.

[0060] More specifically, in the optical system described above, the field height is from 0.7F In the case of 1.0F, the distortion of the image from the sensor unit 600 is between 0% and -2%. Shut up.

[0061] In contrast, in the optical system, the field height is 0F to 1 In the case of 0F, the distortion of the image from the sensor unit 600 is -2% to -5%. Shut up.

[0062] More specifically, in the optical system described above, the field height is from 0.7F In the case of 1.0F, the distortion of the image of the sensor unit 600 is -2% to -5%. It may be possible.

[0063] The first elastic member 310 is disposed within the first housing 410. Member 310 is fixed to the first housing 410. Also, the first elastic member 310 The first lens 210 is fixed to the barrel 100. The first elastic member 310 is the The lens barrel 100 is fluidly fixed to the first housing 410.

[0064] The first elastic member 310 may include a spring or the like. More specifically, see the above. The first elastic member 310 may include a plate-type spring.

[0065] The first housing 410 houses the lens barrel 100. The 410 is connected to the lens barrel 100 through the first elastic member 310.

[0066] The first housing 410 can be made of plastic or metal. The 410 can have a square cylindrical shape.

[0067] The second housing 420 houses the first housing 410. That is, the first Housing 410 is located inside the second housing 420. 10 and the second housing 420 are connected to each other by the second elastic member 320. .

[0068] The first housing 410 is located inside the second housing 420, the second elastic member 320 This allows it to be fixed in a fluid state. That is, the first housing 410 is in a floating state, and the second It can be placed inside Housing 420.

[0069] The second housing 420 is fixed to the circuit board 800. 420 can be fastened to the circuit board 800. The second housing 420 is made of metal or It can be formed from plastic.

[0070] The second elastic member 320 is connected to the first housing 410 and the second housing 420. The second elastic member 320 connects the first housing 410 to the second housing. The second elastic member 320 is fixed to the ring 420 in a fluid manner. The second elastic member 320 includes a spring or the like. It is possible. More specifically, the second elastic member 320 may include a plate-type spring. can.

[0071] The infrared blocking filter section 500 is located inside the second housing 420. The infrared blocking filter unit 500 is fixed to the circuit board 800 and the second housing 42 It can be fixed to 0. The infrared blocking filter section 500 filters the incident infrared rays. The infrared blocking filter section 500 blocks excessive long-range infrared rays from flowing into the sensor section 600. It can block light of a specific wavelength.

[0072] The infrared blocking filter section 500 is made of optical glass with titanium oxide and silicon It can be formed by alternately depositing oxides. To block infrared rays, the titanium oxide The thickness of the kinase and the silicon oxide can be appropriately adjusted.

[0073] The sensor unit 600 is housed in the second housing 420. 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 the incoming image into an electrical signal.

[0074] The sensor unit 600 is fixed to the circuit board 800. The sensor unit 600 can be mounted on the circuit board 800. They are connected by energy.

[0075] The size of the imaging area of ​​the sensor unit 600 may be 2.5 mm × 4.0 mm. The horizontal and vertical sizes of the unit pixels of the sensor section 600 may be 2 μm or less.

[0076] The circuit board 800 can cover the bottom of the second housing 420. The substrate 800 is coupled to the second housing 420. The circuit board 800 is printed It may be a printed circuit board (PCB). The circuit board 800 is The circuit board 800 can be electrically connected to the sensor unit 600. A signal can be applied to drive 00. Also, the circuit board 800 is It can receive signals from the sensor unit 600.

[0077] The sensor unit 600 is mounted on the circuit board 800. More specifically, the sensor unit 600 is mounted on the circuit board 800. The sensor unit 600 can be fixed to the circuit board 800. That is, the sensor unit 600 is The circuit board 800 can be fixed to the second housing 420.

[0078] Furthermore, the circuit board 800 is electrically connected to the drive units 710, 720, 730, and 740. They can be connected. That is, the drive units 710, 720, 730, 7 Signals for driving 40 can be applied to the drive units 710, 720, 730, and 740.

[0079] The drive units 710, 720, 730, and 740 are connected to the first housing 410. The lens barrel 100 is driven. Also, the drive units 710, 720, 730, 740 This drives the first housing 410 relative to the second housing 420.

[0080] The drive units 710, 720, 730, and 740 move the lens barrel 100 and The first housing 410 can be moved. The drive units 710, 720, 7 30, 740 are the first drive unit 710, the second drive unit 720, the third drive unit 730, and the fourth drive unit. It may include a moving part 740. The drive parts 710, 720, 730, and 740 are in response to magnetic force. This allows the lens barrel 100 to move relative to the housing 400. In this case, the magnetic force is in a direction inclined with respect to the optical axis OA of the lens assembly 200. It can act upon.

[0081] The first drive unit 710 is attached to the lens barrel 100. 0 can be fixed to the lens barrel 100. The first drive unit 710 is the lens barrel It can be placed outside of the Ru100.

[0082] The first drive unit 710 may include a coil. The drive signal can be applied through the circuit board 800. The first drive unit 710 is electrically A magnetic field can be generated using aquatic signals.

[0083] The first drive unit 710 pulls the second drive unit 720 in a direction inclined with respect to the reference horizontal plane. A force or repulsive force can be applied. In this case, the first drive unit 710 is in the reference horizontal plane. A magnetic force is applied to the second drive unit 720 at an angle of approximately +20° to approximately +70°. More specifically, the first drive unit 710 is relative to the reference horizontal plane (R). By applying a magnetic force to the second drive unit 720 at an angle of approximately +30° to approximately +50°, can.

[0084] The second drive unit 720 is attached to the first housing 410. For more details, see the previous The second drive unit 720 can be fixed to the first housing 410. For more details, see the second The drive unit 720 can be fixed inside the first housing 410.

[0085] The second drive unit 720 includes a magnetic material. The second drive unit 720 has a plate shape. This is possible. In other words, the second drive unit 720 can be a plate-type magnet.

[0086] The first drive unit 710 and the second drive unit 720 are adjacent to each other. 10 and the second drive unit 720 can be separated by a very small distance. The first drive unit 710 The distance between the and the second drive unit 720 can be approximately 50 μm to approximately 1000 μm. The first drive unit 710 and the second drive unit 720 can face each other. This allows the A magnetic force can be generated between the first drive unit 710 and the second drive unit 720.

[0087] The first drive unit 710 and the second drive unit 720 are relative to the first housing 410. Then, the lens barrel 100 is moved relative to it. More specifically, the first drive unit 710 and The second drive unit 720 is connected to the first housing 410, and the lens assembly The lens barrel 100 can be moved relative to the optical axis direction of 200.

[0088] The third drive unit 730 is attached to the first housing 410. For more details, see the previous The third drive unit 730 can be fixed to the first housing 410. For more details, see the above. The drive unit 730 can be fixed to the outside of the first housing 410.

[0089] The third drive unit 730 includes a magnetic material. The third drive unit 730 has a plate shape. This is possible. In other words, the third drive unit 730 can be a plate-type magnet.

[0090] The fourth drive unit 740 is attached to the second housing 420. For more details, see the previous The fourth drive unit 740 is fixed to the second housing 420. It can be placed inside the second housing 420.

[0091] The fourth drive unit 740 may include a coil. The drive signal can be applied through the circuit board 800. The fourth drive unit 740 A magnetic field can be generated using electrical signals.

[0092] The third drive unit 730 and the fourth drive unit 740 are adjacent to each other. 30 and the fourth drive unit 740 can be separated by a very small distance. The third drive unit 73 The distance between the 0 and the fourth drive unit 740 can be approximately 50 μm to approximately 1000 μm. The third drive unit 730 and the fourth drive unit 740 can face each other. A magnetic force can be generated between the third drive unit 730 and the fourth drive unit 740.

[0093] The third drive unit 730 and the fourth drive unit 740 are relative to the second housing 420. Then, the first housing 410 is moved relative to it. More specifically, the third drive unit 730 And the fourth drive unit 740 moves the lens assembly relative to the second housing 420 The first housing 410 is moved relative to the optical axis of the 200 in a horizontal direction. can.

[0094] In the end, the drive units 710, 720, 730, and 740 drive the lens assembly 200 The sensor unit 600 moves relative to the optical axis and horizontally with respect to the optical axis. It can be made to happen.

[0095] For example, if the subject moves horizontally due to shaking, the third drive unit 730 and the The first housing 410 is tilted or horizontally by the fourth drive unit 740. It can be moved. This allows the lens assembly 200 and the sensor part to move. The horizontal relative positions within 600 can be adjusted to each other.

[0096] Furthermore, the first drive unit 710 and the second drive unit 720 drive the lens assembly 2 The focal length between 00 and the sensor unit 600 can be adjusted.

[0097] In particular, since the optical system has negative distortion, the image is affected by horizontal shaking. Movement is minimized, and the error of the corrections that follow can be reduced.

[0098] That is, as shown in Figure 5, the camera module according to this embodiment reacts to the sensor - When the image moves in section 600, the drive units 710, 720, 730, and 740 move the lens The barrel 100 is moved in the opposite direction to the image movement direction. For example, the drive unit 710 720, 730, and 740 move the lens barrel 100 horizontally or tilts. This process restores the image to its original position, correcting any movement caused by shaking.

[0099] In this case, since the optical system has negative distortion, the outer portion of the image is affected by the lens The error in the image following the movement of Zuberell 100 can be minimized.

[0100] In other words, the optical system of the camera module according to this embodiment has negative distortion. Therefore, the further away from the optical axis, the greater the distance the image moves due to shaking, and this is to prevent that from happening. can.

[0101] In particular, the camera module according to this embodiment minimizes image shaking in the outer portion of the imaging area. This allows for maximizing the effect of image stabilization.

[0102] Figure 6 shows a camera module according to another embodiment of the present invention. This refers to the camera module described above. That is, the camera module in the previous embodiment The explanation in response can be essentially combined with the explanation for this embodiment, except for the modified parts.

[0103] Referring to Figure 6, the camera module according to this embodiment eliminates the first housing 410. It can be omitted. Also, the second housing 420 is directly connected to the lens barrel 100 through an elastic member. They may be connected. In this case, the elastic member is tilted with respect to the optical axis of the lens assembly 200. The lens barrel 100 and the second housing 420 are connected in an oblique direction. It is possible.

[0104] Furthermore, the first drive unit 710 is attached to the lens barrel 100. 10 can contain magnetic material.

[0105] Furthermore, the fourth drive unit 740 is attached to the inside of the second housing 420. The drive unit 740 may include a coil.

[0106] Furthermore, a fifth drive unit 750 is attached to the circuit board 800. For more details, see the above. The fifth drive unit 750 can be interposed between the first drive unit 710 and the circuit board 800. The fifth drive unit 750 may include a coil.

[0107] Furthermore, the fourth drive unit 740 and the fifth drive unit 750 supply electrical power to the circuit board 800. They can be connected to each other.

[0108] The lens barrel 100 is connected to the magnetic field between the first drive unit 710 and the fourth drive unit 740. It can be driven horizontally perpendicular to the optical axis by energy. Also, the lens barrel 100 The magnetic force between the first drive unit 710 and the fifth drive unit 750 drives the optical axis in the direction of the optical axis. It can move.

[0109] That is, the lens barrel 100 is connected to the first drive unit 710 and the fourth drive unit 740. It can be driven more in the horizontal direction. Also, the first drive unit 710 and the fifth drive unit 750 This allows the lens barrel 100 to be driven in the direction of the optical axis.

[0110] The camera module according to this embodiment has a simple structure and performs image stabilization and autofocus adjustment. It is possible.

[0111] Figure 7 shows a camera module according to yet another embodiment of the present invention. The camera module described above will be used as a reference. That is, the camera module in the previous embodiment. The explanation for this can be essentially combined with the explanation for this embodiment, except for the modified parts. .

[0112] Referring to Figure 7, in the camera module according to this embodiment, the third drive unit 730 is omitted. Therefore, the fourth drive unit 740 can be adjacent to the second drive unit 720. For more details, see the previous The fourth drive unit 740 can be interposed between the second drive unit 720 and the circuit board 800.

[0113] As a result, the first housing 410 is located between the second drive unit 720 and the fourth drive unit 740. It can move relative to another due to repulsive or attractive forces. More specifically, the lens barrel 100 is the first drive Driven by a repulsive or attractive force between part 710 and the second drive unit 720, the first housing The 410 can be driven by the magnetic force between the second drive unit 720 and the fourth drive unit 740. That is, the first drive unit 710 and the fourth drive unit 740 drive the second drive unit 720 They can share with each other.

[0114] As a result, the camera module according to this embodiment omits the third drive unit 730 and does not require It is possible to reduce the number of essential parts and have a simple structure.

[0115] The features, structures, and effects described above in the embodiments are at least one embodiment of the present invention. The forms are included and are not necessarily limited to just one embodiment. Features, structures, effects, etc., exemplified in the embodiments are intended for use by persons with ordinary skill in the art to which the embodiments belong. Therefore, this can be combined or modified to be implemented in other embodiments as well. Content related to such combinations and transformations should be interpreted as being within the scope of the present invention. .

[0116] The present invention has been described above based on preferred embodiments, but this is merely an example, and the present invention This does not limit the scope of the invention. Within the scope that does not deviate from the essential characteristics of the present invention, various modifications and applications are possible. It is clear to competitors that it is possible to use it. For example, as specifically shown in the embodiment Each component can be modified and implemented, and the differences related to such modifications and applications are also This should be interpreted as falling within the scope of the present invention as defined in the claims.

Claims

1. The second housing and A movable part comprising a first housing disposed on the second housing, a lens barrel disposed within the first housing, a first coil disposed around the lens barrel, a magnet coupled to the first housing and facing the first coil in a first direction, and a first elastic member coupled to the upper part of the lens barrel and the upper part of the first housing, A second coil is positioned on the second housing and faces the magnet in a second direction perpendicular to the first direction, A second elastic member connecting the second housing and the movable part, Includes, The first coil and the second coil share the magnet, The first housing includes an upper wall and a side wall extending downward from the upper wall, In the second direction, the upper surface of the magnet faces the upper wall of the first housing, and the lower surface of the magnet faces the upper surface of the second coil. The second elastic member overlaps with the second housing in the second direction, The second elastic member overlaps the side wall of the first housing in the first direction, The upper wall of the first housing includes a first portion that overlaps with the magnet in the second direction, and a second portion that is inward from the first portion and does not overlap with the magnet in the second direction. The space between the magnet and the second coil is an open space. The second housing includes a first bottom portion in which the second coil is arranged, and a second bottom portion positioned lower than the first bottom portion. Lens drive mechanism.

2. The lens driving device according to claim 1, wherein the first coil is positioned closer to the lower surface of the magnet than to the upper surface.

3. The lens drive device according to claim 1 or 2, wherein the second elastic member connects the second housing and the movable part along the first direction.

4. The lens drive device according to claim 1 or 2, wherein the first housing surrounds the lens barrel.

5. The magnet includes a first side surface, a second side surface, and a lower surface extending between the first side surface and the second side surface. The first side surface of the magnet is coupled to the side wall of the first housing. The second side surface of the magnet faces the first coil in the first direction, The lens driving device according to claim 1, wherein the lower surface of the magnet overlaps with the second coil in the second direction.

6. The lens driving device according to claim 5, wherein in the second direction, the width of the lower surface of the magnet is smaller than the width of the second coil.

7. The lens driving device according to claim 5, wherein in the first direction, the width of the second side surface of the magnet is greater than the width of the first coil.

8. The lens drive device according to claim 1, wherein in the second direction, the upper wall of the first housing overlaps with the second coil.

9. The lens driving device according to claim 1, wherein the second coil includes a first portion that overlaps with the side wall of the first housing in the second direction, a second portion that overlaps with the magnet in the second direction, and a third portion that overlaps with the upper wall of the first housing in the second direction.

10. The lens driving device according to claim 1, wherein the second housing overlaps with the upper wall and the side wall of the first housing in the second direction.

11. The lens drive device according to claim 1, wherein the first coil is positioned between the side wall of the first housing and the lens barrel in the first direction.

12. The lens driving device according to claim 5, wherein the second coil is disposed between the lower surface of the magnet and the upper surface of the second housing.

13. A circuit board located beneath the second housing, An image sensor unit arranged on the circuit board, It further includes, The lens driving device according to claim 1, wherein the second housing accommodates the image sensor unit.

14. The second housing is fixed to the circuit board, The lens driving device according to claim 13, wherein the circuit board is electrically connected to the first coil and the second coil.

Images