Camera actuator and camera device including the same

Abstract

To provide a camera actuator applicable to an ultra-compact and high-resolution camera, and a camera device including the same.SOLUTION: A camera device comprises: a base; a first lens assy 1110 which is disposed in the base and includes a first lens group 100 and a first lens support unit 110 to which the first lens group is fixed; a second lens assy 1120 which is disposed in the base and includes a second lens group 200 and a second lens support unit 210 to which the second lens group is fixed; and a driving portion for moving the second lens assy. A first stopper member 213 and a second stopper member 214 are formed on the inner wall of the second lens support unit and spaced apart from each other by a distance D that is greater than the height H of the first lens assy along a movement direction of the second lens support unit, the first lens assy is accommodated between the first stopper member and the second stopper member in the second lens support unit, and the second lens assy moves alongside the first lens assy within the base.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a camera actuator and a camera device including the same. [Background technology]

[0002] A camera is a device that takes pictures or videos of objects and can be used in handheld devices, drones, and vehicles. The camera device is attached to the camera to capture images according to the user's movements in order to improve the quality of the images. Image Stabilization to correct or prevent image shake , IS) function, automatically adjusts the distance between the image sensor and the lens to align the lens focal length Auto Focusing (AF) function, zoom lens ( Zoom is a method of increasing or decreasing the magnification of a distant subject through a zoom lens. It may have a zooming function.

[0003] On the other hand, the camera module uses a zoom actuator for zooming function. The actuator is used to move the lens. Friction torque occurs during movement, and this friction torque reduces or consumes driving force. Technical problems such as increased power consumption or reduced control characteristics have arisen.

[0004] In particular, camera modules with multiple zoom lens groups To achieve the best optical performance, the alignment between the multiple lens groups is important. n) and multiple lens groups and the image sensor must be well aligned. The spherical center between the lens groups deviates from the optical axis due to decentering and lens tilt. The phenomenon of tilt, where the central axes of the lens group and the image sensor are misaligned If such a phenomenon occurs, the angle of view changes or the focus is lost, which has an adverse effect on image quality and resolution.

[0005] Also, when the camera device includes all of a zooming function, an AF function, and an OIS function there is also a problem in that the OIS magnet, the zooming magnet, and the AF magnet are arranged close to each other to cause magnetic field interference.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The technical problem to be solved by the present invention is to provide a camera actuator applicable to an ultra-slim, ultra-compact, and high-resolution camera and a camera device including the same.

[0007] The technical problem to be solved by the present invention is to provide a camera actuator that can perform zooming and AF skillfully while maintaining the alignment between lens groups and a camera device including the same.

Problems to be Solved by the Invention

[0008] The technical problem to be solved by the present invention is to provide an autofocusing function in a fixed-zoom optical system

Problems to be Solved by the Invention

[0009] The technical problem to be solved by the present invention is to provide a shake prevention function in a fixed-zoom optical system

Problems to be Solved by the Invention

[0010] The technical problem to be solved by the present invention is to provide a fixed-zoom optical system in which TTL is fixed

Means for Solving the Problems

Means for Solving the Problems

[0011] A camera device according to an embodiment of the present invention includes a base, a first lens group disposed within the base, and a first lens assembly including a first lens support unit to which the first lens group is fixed. , a second lens assembly disposed within the base, including a second lens group and a second lens support unit to which the second lens group is fixed, and a driving unit that moves the second lens assembly, wherein a first stopper member and a second stopper member are formed on an inner wall of the second lens support unit at intervals greater than a height of the first lens assembly along a moving direction of the second lens support unit, the first lens assembly is accommodated between the first stopper member and the second stopper member within the second lens support unit, and the second lens assembly moves together with the first lens assembly within the base. The driving unit includes a coil driving unit disposed on at least one of a first inner wall of the base and a second inner wall of the base facing the first inner wall, and a magnet driving unit disposed on the second lens support unit so as to face the coil driving unit, and the second lens assembly can move along the first inner wall and the second inner wall by an interaction between the coil driving unit and the magnet driving unit. The second lens assembly is moved within the base together with the first lens assembly.

[0012] The driving unit includes a coil driving unit disposed on at least one of a first inner wall of the base and a second inner wall of the base facing the first inner wall, and a magnet driving unit disposed on the second lens support unit so as to face the coil driving unit, and the second lens assembly can move along the first inner wall and the second inner wall by an interaction between the coil driving unit and the magnet driving unit. The second lens assembly is moved within the base together with the first lens assembly. The second lens assembly is moved within the base together with the first lens assembly. The second lens assembly can move along the first inner wall and the second inner wall by an interaction between the coil driving unit and the magnet driving unit.

[0013] a magnet disposed on the first lens assembly, and a first yoke and a second yoke fixed at a predetermined interval on one surface of the base disposed to face the magnet, and further includes a first yoke and a second yoke fixed at a predetermined interval on one surface of the base disposed to face the magnet, and depending on a position of the second lens assembly, the magnet and the first A gravitational force may act between the yokes or between the magnet and the second yoke.

[0014] In the first zooming mode, it moves along the first direction together with the second lens assembly A gravitational force acts between the magnet of the first lens assembly and the first yoke, and the second In the zooming mode, a gravitational force may act between the magnet of the first lens assembly that has moved along the second direction opposite to the first direction together with the second lens assembly and the second yoke. and the second yoke.

[0015] Due to the gravitational force acting between the magnet and the first yoke, the first lens assembly moves further along the first direction until it contacts the first stopper member, and due to the gravitational force acting between the magnet and the second yoke, the first lens assembly can move further along the second direction until it contacts the second stopper member. assembly can move further along the second direction until it contacts the second stopper member. and the second lens assembly can perform focusing in the state where the first lens assembly contacts the first stopper member or in the state where the first lens

[0016] assembly contacts the second stopper member. assembly contacts the second stopper member. and the second lens assembly can perform focusing.

[0017] A guide portion is disposed adjacent to at least one of the first inner wall and the second inner wall of the base, a groove portion corresponding to the guide portion is formed on the outer peripheral surface of the second lens support unit, and a ball can be disposed between the guide portion and the groove portion. A guide portion is disposed adjacent to at least one of the first inner wall and the second inner wall of the base, a groove portion corresponding to the guide portion is formed on the outer peripheral surface of the second lens support unit, and a ball can be disposed between the guide portion and the groove portion. and a ball can be disposed between the guide portion and the groove portion.

[0018] It further includes a guide pin fixed to the base so as to be parallel to the optical axis, and the second lens The lens support unit can move along the guide pin.

[0019] The optical system according to an embodiment of the present invention includes a first lens group and a second lens group that are sequentially arranged from the object side to the image side and include a plurality of lenses. The first lens group is fixed with respect to the image side, the second lens group is movable in the optical axis direction, and when moving from an infinite (infinity) focus to the shortest focus, the separation distance between the first lens group and the second lens group increases. The first lens group has a positive (+) refractive power, the second lens group has a negative (-) refractive power, the TTL (total track length) is fixed within a range smaller than 7 [mm], and the movement stroke of the second lens group when focusing (focusing) from the infinite focus to the shortest focus is within 0.02 mm.

[0020] The camera module according to an embodiment of the present invention includes a substrate; a sensor disposed on the upper part of the substrate; a housing disposed on the upper part of the substrate and including an internal space; a first lens assembly including at least one lens and coupled to the housing; a second lens assembly including at least one lens, housed in the internal space, and coupled to the housing; and a driving unit configured to move the second lens assembly along the optical axis direction or move the housing along a direction perpendicular to the optical axis. The driving unit includes a magnet coupled to the housing; a first coil disposed opposite to the magnet and coupled to at least one side of the second lens assembly; and a second coil disposed opposite to the magnet and coupled to one side of the housing.

Advantages of the Invention

[0021] According to an embodiment of the present invention, a camera adapter applicable to ultra-slim, ultra-compact and high-resolution cameras is provided. In particular, a plurality of lenses of the camera device may be provided. A camera that can realize zooming and AF functions while maintaining alignment between lens groups Also, according to embodiments of the present invention, the actuator can be provided with minimal control. Step zoom can be implemented using the signal.

[0022] According to the embodiment of the present invention, the AF function and the OIS function can be simultaneously fixed at the same time. Since all of the above can be realized, it is possible to provide advantages of miniaturization and light weight.

[0023] According to the embodiment of the present invention, only the second lens group is moved separately, so it is mounted on a drive system. This reduces the weight and current consumption. [Brief explanation of the drawings]

[0024]

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Mode for Carrying Out the Invention

[0060] The present invention can be modified in various ways and can have various embodiments. Specific embodiments will be illustrated and described in the drawings. However, this does not mean that the invention is limited to the specific embodiments. It is not intended to limit the scope of the present invention to any particular embodiment. It should be understood that the present invention includes all modifications, equivalents, or alternatives.

[0061] Although ordinal terms such as second, first, etc. may be used to describe various components, The components are not limited by the terms. The terms do not limit one component to another. For example, the term "component" is used only to distinguish it from other components without departing from the scope of the present invention. The second component may be named the first component, and similarly the first component may be named the second component. The term and / or may refer to a combination or combination of two or more associated listed items. Contains any of a number of related listed items.

[0062] A component is referred to as being "coupled" or "connected" to another component. When the component is connected to another component, it may be directly connected or connected to the other component. However, it should be understood that there may be other components in between. When an element is said to be "directly linked" or "directly connected" to another element It should be understood that there are no other components in between.

[0063] The terms used in this application are merely used to describe specific embodiments and are not to be construed as limiting the scope of the present invention. The singular expression "a," "the," or "the" is used unless the context clearly indicates otherwise. In this application, terms such as "include" or "have" are used in the specification. There exists a characteristic, number, step, operation, component, part, or a combination thereof which is intended to specify, and is to be understood as not precluding the possibility of the existence or addition of one or more other characteristics, numbers, steps, operations, components, parts, or combinations thereof such as those.

[0064] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the technical field to which the present invention belongs. Terms defined as in a commonly used dictionary are to be interpreted as having a meaning consistent with the meaning in the context of the relevant art, and are not to be interpreted in an idealized or overly formal sense unless explicitly defined in this application.

[0065] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, the same or corresponding components will be given the same reference numerals regardless of the reference signs, and redundant descriptions thereof will be omitted.

[0066] FIG. 1 is a perspective view showing an example of a camera device. FIG. 2a is a perspective view of the camera shown in FIG. 1 with the seal can removed, and FIG. 2b is a plan view of the camera shown in FIG. 2a.

[0067] Referring to FIG. 1, the camera device 1000 can include a single or a plurality of camera modules. For example, the camera device 1000 can include a first camera module 1000A and a second camera module 1000B. The first camera module 1000A and the second camera module 1000B can be covered by a predetermined seal can 1510. ​​​​​​​​​​​

[0068] Referring to both FIGS. 1, 2a and 2b, the first camera module 1000A can include a single or a plurality of actuators. For example, the first camera module 100 0A can include a first actuator 1100 and a second actuator 1200.

[0069] The first actuator 1100 can be electrically connected to the first group of circuit boards 1410, and the second actuator 1200 can be electrically connected to the second group of circuit boards 1420. Although not shown, the second group of circuit boards 1420 may be electrically connected to the first group of circuit boards 1410. The second camera module 1000B can be electrically connected to the third group of circuit boards 1430.

[0070] The first actuator 1100 can be a zoom actuator or an AF (Auto o Focus) actuator. For example, the first actuator 1100 supports one or a plurality of lenses and moves the lenses according to a control signal of a predetermined control unit to perform an auto focusing function or a zoom function.

[0071] The second actuator 1200 can be an OIS (Optical Image Stabili zer) actuator.

[0072] The second camera module 1000B can include a fixed focal length lens (not shown) disposed in a predetermined lens barrel. The fixed focal length lens (fixed focal length les) can be referred to as a "single focal length lens" or a "single lens".

[0073] ​​​​​ The second camera module 1000B is disposed in a predetermined housing (not shown) and can include an actuator (not shown) capable of driving a lens unit. The actuator can be a voice coil motor, a micro actuator, a silicon actuator, etc., and can be variously applied, such as electrostatic, thermal, bimorph, electrostatic force, etc., and is not limited thereto. Next, FIG. 3a is a perspective view of the first camera module shown in FIG. 2a, and FIG. 3b is a side cross-sectional view of the first camera module shown in FIG. 3a. Referring to FIG. 3a, the first camera module 1000A can include a first actuator 1100 having a zooming function and an AF function, and a second actuator 1200 having an OIS function disposed on one side of the first actuator 1100. Referring to FIG. 3b, the first actuator 1100 can include an optical system and a lens driving unit. For example, the first actuator 1100 can have at least one of a first lens assembly 1110, a second lens assembly 1120, a third lens assembly 1130, and a guide pin 50 disposed therein. Also, the first actuator 1100 can include a coil driving unit 1140 and a magnet driving unit 1160 to perform a high magnification zooming function. For example, the first lens assembly 1110 and the second lens assembly 1120 are moving lenses that move through the coil driving unit 1140, the magnet driving unit 1160, and the guide pin 50.

[0074] Next, FIG. 3a is a perspective view of the first camera module illustrated in FIG. 2a, and FIG. 3b is a side cross-sectional view of the first camera module illustrated in FIG. 3a. Referring to FIG. 3a, the first camera module 1000A includes a first actuator 1100 having a zooming function and an AF function, and a second actuator 1200 having an OIS function disposed on one side of the first actuator 1100.

[0075] Referring to FIG. 3a, the first camera module 1000A includes a first actuator 1100 having a zooming function and an AF function, and a second actuator 1200 having an OIS function disposed on one side of the first actuator 1100. Referring to FIG. 3b, the first actuator 1100 can include an optical system and a lens driving unit. For example, the first actuator 1100 can have at least one of a first lens assembly 1110, a second lens assembly 1120, a third lens assembly 1130, and a guide pin 50 disposed therein. Referring to FIG. 3b, the first actuator 1100 can include an optical system and a lens driving unit. For example, the first actuator 1100 can have at least one of a first lens assembly 1110, a second lens assembly 1120, a third lens assembly 1130, and a guide pin 50 disposed therein.

[0076] Referring to FIG. 3b, the first actuator 1100 can include an optical system and a lens driving unit. For example, the first actuator 1100 can have at least one of a first lens assembly 1110, a second lens assembly 1120, a third lens assembly 1130, and a guide pin 50 disposed therein. Also, the first actuator 1100 can include a coil driving unit 1140 and a magnet driving unit 1160 to perform a high magnification zooming function. For example, the first lens assembly 1110 and the second lens assembly 1120 are moving lenses that move through the coil driving unit 1140, the magnet driving unit 1160, and the guide pin 50. Referring to FIG. 3b, the first actuator 1100 can include an optical system and a lens driving unit. For example, the first actuator 1100 can have at least one of a first lens assembly 1110, a second lens assembly 1120, a third lens assembly 1130, and a guide pin 50 disposed therein. Referring to FIG. 3b, the first actuator 1100 can include an optical system and a lens driving unit. For example, the first actuator 1100 can have at least one of a first lens assembly 1110, a second lens assembly 1120, a third lens assembly 1130, and a guide pin 50 disposed therein.

[0077] Also, the first actuator 1100 can include a coil driving unit 1140 and a magnet driving unit 1160 to perform a high magnification zooming function. For example, the first lens assembly 1110 and the second lens assembly 1120 are moving lenses that move through the coil driving unit 1140, the magnet driving unit 1160, and the guide pin 50. Referring to FIG. 3b, the first actuator 1100 can include an optical system and a lens driving unit. For example, the first actuator 1100 can have at least one of a first lens assembly 1110, a second lens assembly 1120, a third lens assembly 1130, and a guide pin 50 disposed therein.

[0078] Referring to FIG. 3b, the first actuator 1100 can include an optical system and a lens driving unit. For example, the first actuator 1100 can have at least one of a first lens assembly 1110, a second lens assembly 1120, a third lens assembly 1130, and a guide pin 50 disposed therein. Referring to FIG. 3b, the first actuator 1100 can include an optical system and a lens driving unit. For example, the first actuator 1100 can have at least one of a first lens assembly 1110, a second lens assembly 1120, a third lens assembly 1130, and a guide pin 50 disposed therein. The third lens assembly 1130 may be a fixed lens. However, the present invention is not limited to this. For example, the third lens assembly 1130 may be configured to direct light to a specific position. The first lens assembly 1110 functions as a focusing lens. A variable magnification element ( On the other hand, the first lens assembly 1110 The distance to the subject or the image distance may change significantly, resulting in a large change in magnification. The first lens assembly 1110 plays an important role in changing the focal length or magnification of the optical system. On the other hand, the image point formed by the first lens assembly 1110, which is a magnification variable element, is Therefore, the second lens assembly 1120 is For example, the second lens assembly can perform position compensation for the image formed by the second lens assembly. 1120 is the actual image formed by the first lens assembly 1110, which is a variable magnification element. A compensator that performs the role of accurately focusing the image at the sensor 1190 position. ) functions can be performed.

[0079] For example, the first lens assembly 1110 and the second lens assembly 1120 are connected to the coil driver 1110. 140 and the magnet driving unit 1160 can be driven by an electromagnetic force generated by the interaction of the magnet driving unit 1160 and the magnetic driving unit 140.

[0080] A predetermined image sensor 1190 can be arranged perpendicular to the optical axis direction of the parallel light.

[0081] Next, the second actuator 1200 is connected to the shake correction unit 12 disposed in the housing. 20, may include a prism unit 1230 disposed on the shake correction unit 1220. It is possible. The shake correction unit 1220 includes a shaper member 1222 and a lens member 1224 and can include a magnet drive unit 72M and a coil drive unit 72C. Here, the lens member 1224 can be used in combination with a liquid lens, a fluid lens, a variable prism, etc., and the shape of the lens member 1224 is reversibly deformed by the pressure applied to the surface of the lens member 1224 and accordingly, the optical path passing through the lens member 1224 can be changed. For example, the lens member 1224 can include a fluid surrounded by an elastic membrane, and the shaper member 122 2 is coupled to, connected to, or in direct contact with the lens member 1224, and the movement of the shaper member 1222 applies pressure to the lens member 1224, and accordingly, the shape of the lens member 1224 is reversibly deformed and the optical path passing through the lens member 1224 can be changed. As will be described later , the movement of the shaper member 1222 can be generated by the interaction between the magnet drive unit 72M and the coil drive unit 72C .

[0082] In this way, OIS can be implemented by controlling the optical path passing through the lens member 1224, and accordingly, the occurrence of decent and tilt phenomena can be minimized, and the best optical characteristics can be achieved.

[0083] Figures 1 to 3 and the description related thereto are created for the purpose of explaining the overall structure and operating principle of the camera device according to an embodiment of the present invention, and thus the embodiments of the present invention are not limited to the detailed configurations illustrated in Figures 1 to 3.

[0084] Hereinafter, a first act for implementing a zooming function and an AF function according to an embodiment of the present invention Let's explain the actuator in more detail.

[0085] FIG. 4 is a perspective view of a first actuator according to an embodiment of the present invention, and FIG. 5 is a perspective view of the first actuator with the base and yoke removed, and FIG. 6 is a sectional view of FIG. 4, and FIG. 7 is a perspective view of the first actuator of FIG. 4 with the base and yoke illustrated, and FIG. 8 is an exploded perspective view of the first lens assembly and the second lens assembly of FIG. 5. Incidentally, according to FIG. 3b, the first actuator 1100 for implementing the zooming function and the AF function is illustrated as including the first lens assembly 1110, the second lens assembly 1120, and the third lens assembly 1130. However, since the embodiments of the present invention mainly relate to the structures of the first lens assembly 1110 and the second lens assembly 1120, which are moving lenses, the illustration and description of the third lens assembly 1130, which is a fixed lens, will be omitted hereinafter. Regarding the structure of the first lens assembly 1110 and the second lens assembly 1120, which are the moving lenses, the illustration and description of the third lens assembly 1130, which is a fixed lens, will be omitted hereinafter. Referring to FIGS. 4 to 8, the first actuator 1100 includes a base 20, a first lens assembly

[0086] 1110, a second lens assembly 1120, and a third lens assembly (not shown). The first lens assembly 1110 and the second lens assembly 1120 are disposed within the base 20. The first lens assembly 1110 includes a first lens group 100 and a first lens support unit 110. The first lens group 100 is accommodated within the first lens support unit 110 and can be fixed to the first

[0087] lens support unit 110. The second lens assembly 1120 includes a second lens group 200 and a second lens support unit 210. The second lens group 200 is supported by the second lens support unit 210. The first lens group 100 is accommodated within the first lens support unit 110 and can be fixed to the first lens support unit 110. The second lens assembly 1120 includes a second lens group 200 and a second lens support unit 210. The second lens group 200 is supported by the second It can be accommodated within the holding unit 210 and fixed to the second lens support unit 210.

[0088] According to an embodiment of the present invention, the first lens assembly 1110 is accommodated within the second lens support unit 210 of the second lens assembly 1120 . For this purpose, the second lens support unit 210 can include a region surrounding the edge of the second lens group 200 and a region for accommodating the first lens assembly 1110. Accordingly, when the second lens assembly 1120 moves, the first lens assembly 1110 can move together with the second lens assembly 1120 without a separate configuration for driving the first lens assembly 1110. The magnification can be adjusted according to the positions and intervals of the first lens group 100 within the first lens assembly 1110, the second lens group 200 within the second lens assembly 1120, a third lens group (not shown) within a third lens assembly (not shown), and an image sensor (not shown). When the second lens assembly 1120 moves, the first lens assembly 1110 can move together with the second lens assembly 1120 even without a separate configuration for driving the first lens assembly 1110. The magnification can be adjusted according to the positions and intervals of the first lens group 100 within the first lens assembly 1110, the second lens group 200 within the second lens assembly 1120, a third lens group (not shown) within a third lens assembly (not shown), and an image sensor (not shown). When the second lens assembly 1120 moves, the first lens assembly 1110 can move together with the second lens assembly 1120 even without a separate configuration for driving the first lens assembly 1110. The magnification can be adjusted according to the positions and intervals of the first lens group 100 within the first lens assembly 1110, the second lens group 200 within the second lens assembly 1120, a third lens group (not shown) within a third lens assembly (not shown), and an image sensor (not shown). When the second lens assembly 1120 moves, the first lens assembly 1110 can move together with the second lens assembly 1120 even without a separate configuration for driving the first lens assembly 1110. The magnification can be adjusted according to the positions and intervals of the first lens group 100 within the first lens assembly 1110, the second lens group 200 within the second lens assembly 1120, a third lens group (not shown) within a third lens assembly (not shown), and an image sensor (not shown). When the second lens assembly 1120 moves, the first lens assembly 1110 can move together with the second lens assembly 1120 even without a separate configuration for driving the first lens assembly 1110. The magnification can be adjusted according to the positions and intervals of the first lens group 100 within the first lens assembly 1110, the second lens group 200 within the second lens assembly 1120, a third lens group (not shown) within a third lens assembly (not shown), and an image sensor (not shown). When the second lens assembly 1120 moves, the first lens assembly 1110 can move together with the second lens assembly 1120 even without a separate configuration for driving the first lens assembly 1110. The magnification can be adjusted according to the positions and intervals of the first lens group 100 within the first lens assembly 1110, the second lens group 200 within the second lens assembly 1120, a third lens group (not shown) within a third lens assembly (not shown), and an image sensor (not shown). When the second lens assembly 1120 moves, the first lens assembly 1110 can move together with the second lens assembly 1120 even without a separate configuration for driving the first lens assembly 1110. The magnification can be adjusted according to the positions and intervals of the first lens group 100 within the first lens assembly 1110, the second lens group 200 within the second lens assembly 1120, a third lens group (not shown) within a third lens assembly (not shown), and an image sensor (not shown).

[0089] For the movement of the second lens assembly 1120, coil driving parts (not shown) are respectively arranged on the first inner wall 21 and the second inner wall 22 of the base 20, and magnet driving parts 1160 can be respectively arranged on the first outer wall 211 of the second lens support unit 210 facing the first inner wall 21 of the base 20 and the second outer wall 212 of the second lens support unit 210 facing the second inner wall 22 of the base 20. Due to the electromagnetic interaction between the coil driving part (not shown) and the magnet driving part 1160, the second lens support unit 210 can move along the first inner wall 21 and the second inner wall 22 of the base 20, and the first lens assembly 1110 accommodated within the second lens support unit 210 can move together with the second lens support unit 210. For the movement of the second lens assembly 1120, coil driving parts (not shown) are respectively arranged on the first inner wall 21 and the second inner wall 22 of the base 20, and magnet driving parts 1160 can be respectively arranged on the first outer wall 211 of the second lens support unit 210 facing the first inner wall 21 of the base 20 and the second outer wall 212 of the second lens support unit 210 facing the second inner wall 22 of the base 20. Due to the electromagnetic interaction between the coil driving part (not shown) and the magnet driving part 1160, the second lens support unit 210 can move along the first inner wall 21 and the second inner wall 22 of the base 20, and the first lens assembly 1110 accommodated within the second lens support unit 210 can move together with the second lens support unit 210. For the movement of the second lens assembly 1120, coil driving parts (not shown) are respectively arranged on the first inner wall 21 and the second inner wall 22 of the base 20, and magnet driving parts 1160 can be respectively arranged on the first outer wall 211 of the second lens support unit 210 facing the first inner wall 21 of the base 20 and the second outer wall 212 of the second lens support unit 210 facing the second inner wall 22 of the base 20. Due to the electromagnetic interaction between the coil driving part (not shown) and the magnet driving part 1160, the second lens support unit 210 can move along the first inner wall 21 and the second inner wall 22 of the base 20, and the first lens assembly 1110 accommodated within the second lens support unit 210 can move together with the second lens support unit 210. For the movement of the second lens assembly 1120, coil driving parts (not shown) are respectively arranged on the first inner wall 21 and the second inner wall 22 of the base 20, and magnet driving parts 1160 can be respectively arranged on the first outer wall 211 of the second lens support unit 210 facing the first inner wall 21 of the base 20 and the second outer wall 212 of the second lens support unit 210 facing the second inner wall 22 of the base 20. Due to the electromagnetic interaction between the coil driving part (not shown) and the magnet driving part 1160, the second lens support unit 210 can move along the first inner wall 21 and the second inner wall 22 of the base 20, and the first lens assembly 1110 accommodated within the second lens support unit 210 can move together with the second lens support unit 210. For the movement of the second lens assembly 1120, coil driving parts (not shown) are respectively arranged on the first inner wall 21 and the second inner wall 22 of the base 20, and magnet driving parts 1160 can be respectively arranged on the first outer wall 211 of the second lens support unit 210 facing the first inner wall 21 of the base 20 and the second outer wall 212 of the second lens support unit 210 facing the second inner wall 22 of the base 20. Due to the electromagnetic interaction between the coil driving part (not shown) and the magnet driving part 1160, the second lens support unit 210 can move along the first inner wall 21 and the second inner wall 22 of the base 20, and the first lens assembly 1110 accommodated within the second lens support unit 210 can move together with the second lens support unit 210. For the movement of the second lens assembly 1120, coil driving parts (not shown) are respectively arranged on the first inner wall 21 and the second inner wall 22 of the base 20, and magnet driving parts 1160 can be respectively arranged on the first outer wall 211 of the second lens support unit 210 facing the first inner wall 21 of the base 20 and the second outer wall 212 of the second lens support unit 210 facing the second inner wall 22 of the base 20. Due to the electromagnetic interaction between the coil driving part (not shown) and the magnet driving part 1160, the second lens support unit 210 can move along the first inner wall 21 and the second inner wall 22 of the base 20, and the first lens assembly 1110 accommodated within the second lens support unit 210 can move together with the second lens support unit 210. For the movement of the second lens assembly 1120, coil driving parts (not shown) are respectively arranged on the first inner wall 21 and the second inner wall 22 of the base 20, and magnet driving parts 1160 can be respectively arranged on the first outer wall 211 of the second lens support unit 210 facing the first inner wall 21 of the base 20 and the second outer wall 212 of the second lens support unit 210 facing the second inner wall 22 of the base 20. Due to the electromagnetic interaction between the coil driving part (not shown) and the magnet driving part 1160, the second lens support unit 210 can move along the first inner wall 21 and the second inner wall 22 of the base 20, and the first lens assembly 1110 accommodated within the second lens support unit 210 can move together with the second lens support unit 210. For the movement of the second lens assembly 1120, coil driving parts (not shown) are respectively arranged on the first inner wall 21 and the second inner wall 22 of the base 20, and magnet driving parts 1160 can be respectively arranged on the first outer wall 211 of the second lens support unit 210 facing the first inner wall 21 of the base 20 and the second outer wall 212 of the second lens support unit 210 facing the second inner wall 22 of the base 20. Due to the electromagnetic interaction between the coil driving part (not shown) and the magnet driving part 1160, the second lens support unit 210 can move along the first inner wall 21 and the second inner wall 22 of the base 20, and the first lens assembly 1110 accommodated within the second lens support unit 210 can move together with the second lens support unit 210. That is, the current flowing through the coil driver (not shown) can move with the Depending on the amount or direction of the flow, the magnet driving unit 1160 and the second lens support unit 21 The distance or direction of movement of the second lens support unit 210 may change. It moves along the base 20 using a guide pin, a guide ball, a guide rail, or the like as a medium. A detailed example of this is given below.

[0090] On the other hand, according to the embodiment of the present invention, the second lens assembly 1120 and the second lens assembly The first lens assembly 1110 accommodated in the second lens support unit 210 of the first lens assembly 1120 A sensor unit may further be arranged to sense the position of the sensor and control the movement. The sensor may include a magnet 1170 and a Hall sensor (not shown). The single magnet 1170 is fixed to the second lens support unit 210. It can move with the unit 210. Hall sensors (not shown) actuate the coils. For example, the Hall sensor may be disposed adjacent to a portion (not shown) of the base 20. The coil driving unit is disposed on the first inner wall 21 side and the coil driving unit is disposed on the second inner wall 22 side of the base 20. For example, the coil driver may be disposed adjacent to at least one of the coil drivers. The Hall sensor may be disposed on the inner circumference of the coil wound to form the coil drive. The sensor (not shown) senses the magnetic field of the sensing magnet 1170 and determines the sensor according to the strength of the magnetic field. The position of the sensing magnet 1170 can be sensed. 70 moves together with the second lens support unit 210, so the sensing magnet 117 The positions of the first lens assembly 1110 and the second lens assembly 1120 depend on the position of 0. It can be sensed, and a control signal for adjusting the magnification is generated based on this, and the voltage can be applied to a coil driving unit (not shown) by the control signal.

[0091] Thus, according to an embodiment of the present invention, the first lens assembly 1110 is housed within the second lens support unit 210 of the second lens assembly 1120 and moves together with the second lens support unit 210 as the second lens support unit 210 moves. According to this, since it is not necessary to separately control the movement of the first lens assembly 1110 and the second lens assembly 1120, the occurrence of decentering and tilt phenomena can be minimized, and the best optical characteristics can be achieved. Specifically, in order for the second lens support unit 210 to house the first lens assembly 1110, a first stopper member 213 and a second stopper member 214 may be formed on the inner wall of the second lens support unit 210, and the first stopper member 213 and the second stopper member 214 may be separated by a predetermined distance D, and the first lens assembly 1110 may be housed between the first stopper member 213 and the second stopper member 214. At this time, the distance D between the first stopper member 213 and the second stopper member 214 may be larger than the height H of the first lens assembly 1110. Also, the inner diameter of the second lens support unit 210 may be larger than the outer diameter of the first lens assembly 1110. According to this, although the first lens assembly 1110 moves together with the second lens assembly 1120, it can move between the first stopper member 213 and the second stopper member 214 of the second lens support unit 210.

[0092] More specifically, in order for the second lens support unit 210 to accommodate the first lens assembly 1110, a first stopper member 213 and a second stopper member 214 may be formed on the inner wall of the second lens support unit 210, and the first stopper member 213 and the second stopper member 214 may be separated by a predetermined distance D, and the first lens assembly 1110 may be housed between the first stopper member 213 and the second stopper member 214. At this time, the distance D between the first stopper member 213 and the second stopper member 214 may be larger than the height H of the first lens assembly 1110. Also, the inner diameter of the second lens support unit 210 may be larger than the outer diameter of the first lens assembly 1110. According to this, although the first lens assembly 1110 moves together with the second lens assembly 1120, it can move between the first stopper member 213 and the second stopper member 214 of the second lens support unit 210. ​​​​​​​​​​​​​

[0093] Meanwhile, at least one magnet 300 is further disposed in the first lens assembly 1110. and is placed on at least one surface of the base 20 that is arranged to face the magnet 300. At least two yokes 400 and 410 are further arranged at a predetermined interval and fixed. It can be done.

[0094] Here, the yokes 400 and 410 are made of a magnetic metal and are positioned at a predetermined distance from the magnet 300. When the second lens assembly 1 approaches within a certain distance, an attractive force acts on the magnet 300. The position of 120 determines the position of the magnet 300 and the first yoke 400 of the first lens assembly 1110. There is an attractive force between the magnet 300 of the first lens assembly 1110 and the second yoke 4. 10There can be attractive forces between them.

[0095] For this reason, the magnet 300 is fixed to the first inner wall surface 21 and the second inner wall surface 22 of the base 20. The third inner wall surface 23 may be disposed on the first lens assembly 1110. The first yoke 400 and the second yoke 410 are arranged on the third inner wall surface 23 so as to be spaced apart from each other. Similarly, the magnet 300 may be attached to the third inner wall surface 23 of the base 20. 4 may be further disposed on the first lens assembly 1110 so as to face the inner wall surface 24. The third yoke 410 and the fourth yoke 430 are spaced apart from each other on the fourth inner wall surface 24. At this time, the magnet 30 disposed so as to face the third inner wall surface 23 may be disposed in the same manner as the magnet 30. The magnets 300 arranged to face the fourth inner wall surface 24 are symmetrically arranged. The first yoke 400 and the third yoke 410 may be arranged symmetrically to each other. The second yoke 410 and the fourth yoke 430 can be arranged symmetrically with respect to each other.

[0096] To explain the structure and operating principle of the first actuator according to an embodiment of the present invention in more detail, FIG. 9 is a drawing showing the movement process of the actuator device according to an embodiment of the present invention in the telephoto mode, and FIG. 10 is a drawing showing the movement process of the actuator device according to an embodiment of the present invention in the wide-angle mode.

[0097] FIG. 9(a) is a side view when the second lens assembly 1120 moves in the first direction while holding the first lens assembly 1110 in the telephoto mode, FIG. 9(b) is a perspective view of FIG. 9(a), FIG. 9(c) is a top view of FIG. 9(b), FIG. 9(d) is a perspective view when the first lens assembly 1110 further moves in the first direction due to the gravitational force with the first yoke 400 in FIG. 9(b), and FIG. 9(e) is a part of the top view of FIG. 9(d). When a current is applied to a coil driving unit (not shown) so as to perform zooming in the telephoto mode, the magnet driving unit 1160 is fixed by the interaction between the coil driving unit (not shown) and the magnet driving unit 1160, and the second lens assembly 1120 moves a predetermined distance in the first direction. The position of the second lens assembly 1120 can be sensed by the interaction between the sensing magnet 1170 fixed to the second lens assembly 1120 and moving together with the second lens assembly 1120 and a hall sensor (not shown) arranged adjacent to the coil driving unit (not shown). That is, the hall sensor (not shown) senses the magnetic field of the sensing magnet 1170 to sense the position of the sensing magnet 1170, that is, the position of the second lens assembly 1120. ​​​​​​It is possible to sense the position. At this time, the first lens assembly 1110 moves in the first direction together with the second lens assembly 1120 while being locked to the second stopper - member 214. Along with this, a gravitational force acts between the magnet 300 on the first lens assembly 1110 and the first yoke 400, and due to the gravitational force acting between the magnet 300 and the first yoke 400, the first lens assembly 1110 can move further along the first direction until it contacts and is locked to the first stopper member 213. Along with this, the first actuator can be zoomed in the telephoto mode. For this purpose, the first lens assembly 1110 and the second lens support unit 210 are not connected through separate fastening means or adhesive members, but the first lens assembly 1110 can move freely between the first stopper member 213 and the second stopper member 214 of the second lens support unit 210.

[0098] On the other hand, with the first lens assembly 1110 fixed to the first stopper member 213, the second lens assembly 1120 moves finely in the first direction or the second direction, for example, within a distance of 0.6 mm to perform focusing. At this time, the position of the second lens assembly 1120 can be sensed by the interaction between the sensing magnet 1170 fixed to the second lens assembly 1120 and moving together with the second lens assembly 1120 and a hall sensor (not shown) arranged adjacent to a coil driving unit (not shown).

[0099] FIG. 10(a) is a side view when the second lens assembly 1120 moves in the second direction while holding the first lens assembly 1110 in the wide - angle mode, and FIG. 10(b) is FIG. 10(a) ​​​​​​​​​​​​​ is a perspective view, FIG. 10(c) is a part of the top view of FIG. 10(b), and FIG. 10(d) is FIG. 10(b) when the first lens assembly 1110 is further moved in the second direction by the attraction force with the second yoke 410 is a perspective view, and FIG. 10(e) is a part of the top view of FIG. 10(d). When a current is applied to a coil driving unit (not shown) so as to zoom in the wide-angle mode, due to the interaction between the coil driving unit (not shown) and the magnet driving unit 1160, the second lens assembly 1120 to which the magnet driving unit 1160 is fixed moves a predetermined distance in the second direction. The position of the second lens assembly 1120 can be sensed by the interaction between the sensing magnet 1170 fixed to the second lens assembly 1120 and moving together with the second lens assembly 1120 and a hall sensor (not shown) arranged adjacent to the coil driving unit (not shown). That is, the hall sensor (not shown) can sense the magnetic field of the sensing magnet 1170 to sense the position of the sensing magnet 1170, i.e., the position of the second lens assembly 1120. At this time, the first lens assembly 1110 moves in the second direction together with the second lens assembly 1120 while being locked to the first stopper member 213. Accordingly, an attraction force acts between the magnet 300 on the first lens assembly 1110 and the second yoke 410, and the first lens assembly 1110 further moves along the second direction until it contacts and is locked to the second stopper member 214 by the attraction force acting between the magnet 300 and the second yoke 410. Accordingly, the first actuator can be zoomed in the wide-angle mode.

[0100] On one hand, with the first lens assembly 1110 fixed to the second stopper member 214, the second lens assembly 1120 finely moves within a distance of 0.6 mm in the first direction or the second direction to perform focusing. At this time, the position of the second lens assembly 1120 can be sensed by the interaction between the sensing magnet 1170 fixed to the second lens assembly 1120 and moving together with the second lens assembly 1120 and a hall sensor (not shown) arranged adjacent to a coil driving unit (not shown).

[0101] Here, for the sake of convenience of explanation, only two zooming modes, namely the wide-angle mode and the telephoto mode, are taken as examples for explanation, but it is not limited thereto. According to an embodiment of the present invention, the magnification can be adjusted step by step in two or more zooming modes by the position of the yoke and the control of the driving unit.

[0102] FIG. 11(a) is a graph showing the interaction between the hall sensor and the sensing magnet applied to the first actuator according to an embodiment of the present invention, FIG. 11(b) is a graph showing the stroke of the first lens assembly applied to the first actuator according to an embodiment of the present invention, and FIG. 11(c) is a graph showing the stroke of the second lens assembly applied to the first actuator according to an embodiment of the present invention.

[0103] Referring to FIG. 11(a), the horizontal axis represents the digital code and the vertical axis represents the magnetic field. The magnetic field sensed by the hall sensor can vary depending on the position of the sensing magnet, and the hall sensor can generate or output a digital code based on the sensed magnetic field. Here The Hall sensor can sense the north and south poles separately. The sensor can include two Hall sensors. For example, in Figure 11(a), If Hall sensor 1 shows the relationship between the north pole and the digital code, Hall sensor 2 shows the relationship between the south pole and the digital code. Or Hall sensor 1 will show the relationship between the South pole and the digital code. If the Hall sensor 2 shows the relationship between the north pole and the digital code, then the Hall sensor 2 will show the relationship between the north pole and the digital code.

[0104] According to an embodiment of the present invention, both the Hall sensor 1 and the Hall sensor 2 have a high magnetic field. Section A where the Hall sensor outputs Only when the digital code to be transmitted is within section A, the first lens assembly 1110 or The second lens assembly 1120 can be controlled to move.

[0105] On the other hand, referring to FIG. 11(b), the horizontal axis is the control code and the vertical axis is the first lens assembly. Referring to FIG. 11(c), the horizontal axis represents the control code and the vertical axis represents the second lens stroke. Indicates the stroke of the assembly.

[0106] Referring to FIG. 11(b), a predetermined control code (e.g., about 400) activates the first lens assembly. It can be seen that the stroke of the lens, i.e., the magnification ratio, changes suddenly. When the specified control code (e.g., approx. 720) is used, the stroke of the second lens assembly will be abrupt. It can be seen that it changes to

[0107] By using this, a predetermined control code (e.g., about 400) is input to the coil driver (not shown). Input the zoom lens to move the first lens assembly 1110 and the second lens assembly 1120 together. After performing focusing, a predetermined control code (e.g., about 720) is input to finely move the second lens assembly -1120 to perform focusing.

[0108] On the other hand, as described above, the second lens assembly 1120 moves along the first inner wall 21 and the second inner wall 22 of the base 20 while holding the first lens assembly 1110. At this time, it can move through a guide pin, a guide ball, a guide rail, or the like.

[0109] FIG. 12 shows an example in which the second lens assembly according to an embodiment of the present invention moves along a guide pin.

[0110] Referring to FIG. 12, the guide pin 50 can be arranged to be parallel to the optical axis, and the end of the guide pin 50 can be fixed to the base 20 or a fixing member (e.g., the third lens assembly, etc.) in the first actuator. The guide pin 50 can be inserted through a guide hole 215 formed in the second lens support unit 210 of the second lens assembly 1120, and the second lens assembly can move along the guide pin 50.

[0111]

[0112] FIGS. 13 and 14 show an example in which the second lens assembly according to an embodiment of the present invention moves along a guide ball.

[0112] Referring to FIG. 13, a guide portion 25 is arranged adjacent to at least one of the first inner wall 21 and the second inner wall 22 of the base 20, and a recess 26 can be formed in the guide portion 25 along the optical axis. Although not shown, the guide portion 25 can be fixed to at least one of the first inner wall 21 and the second inner wall 22 of the base.

[0113] ​​​ Referring to FIG. 14, a groove portion 216 corresponding to the recesses 26 of the guide portion 25 may be formed on the outer peripheral surface of the second lens support unit 210. The second lens assembly 1120 can move by the balls 55 disposed between the recesses 26 of the guide portion 25 and the groove portion 216. Thus, when the guide portion 25 is further disposed between the first inner wall 21 and the second inner wall 22 of the base 20 and the outer peripheral surface of the second lens support unit 210, the frictional torque generated during the movement of the lens assembly is reduced to reduce the frictional resistance, thereby improving the driving force, reducing the power consumption, and improving the control characteristics during zooming. Along with this, during zooming, while minimizing the frictional torque, it is possible to prevent the occurrence of phenomena such as decentering of the lens, tilting of the lens, and misalignment of the central axes of the lens group and the image sensor, resulting in a composite technical effect of significantly improving the image quality and optical performance. Although not shown in the drawings, two guide portions 25 may be disposed adjacent to the first inner wall 21 and the second inner wall 22 so as to be symmetric with each other, and the groove portion 216 may be formed symmetrically on the outer peripheral surface of the second lens support unit 210 so as to face the first inner wall 21 and the second inner wall 22. Although not shown in the drawings, the guide portion 25 may be omitted, and the recess 26 may be formed directly on at least one of the first inner wall 21 and the second inner wall 22. Hereinafter, the detailed structure of the second actuator will be described more specifically.

[0114]

[0115]

[0116]

[0117] FIG. 15 is a perspective view of the second actuator of the camera device shown in FIGS. 1 to 3. 16 is a perspective view of the second actuator of FIG. 15 from another direction. 15 is a perspective view of the second circuit board and the driving unit of the second actuator of FIG. 15, and FIG. 18 is a perspective view of the second circuit board and the driving unit of the second actuator of FIG. 19 is a partially exploded perspective view of the second actuator of FIG. 15; FIG. 1 is a perspective view with the circuit board removed.

[0118] 15 to 19, the shake correction unit 1230 is disposed below the prism unit 1230. By placing 220, the lens size can be adjusted by the optical lens assembly when OIS is implemented. This eliminates size restrictions and ensures sufficient light intensity.

[0119] The second circuit board 1250 is connected to a predetermined power supply (not shown) and drives the coil driver 72C. The second circuit board 1250 is a rigid printed circuit board. id PCB), Flexible Printed Circuit Board (Flexible PCB), Rigid F Rigid Flexible PCB and other electrically connected The circuit board may include a circuit board on which a wiring pattern may be formed.

[0120] The coil driver 72C may include a single or multiple unit coil drivers. For example, the driving unit 72C may include a first unit coil driving unit 72C1, a second unit coil driving unit 72C2, a A unit coil driving section 72C2, a third unit coil driving section 72C3, and a fourth unit coil driving section (not shown).

[0121] The driving unit 72C further includes a Hall sensor (not shown) to control the motor as will be described later. The position of the magnet drive unit 72M may be recognized. For example, the first unit coil drive unit 72C1 includes a first Hall sensor (not shown), and the third unit coil drive unit 72C3 may include a second Hall sensor (not shown).

[0122] On the other hand, as described above, the shaper member 1222 is disposed on the lens member 1224, and the shape of the lens member 1224 can be deformed by the movement of the shaper member 1222. At this time, the magnet drive unit 72M is disposed on the shaper member 1222, and the coil drive unit 72C can be disposed on the housing 1210. Referring to FIG. 18, the housing 1210 has a predetermined opening 1212H through which light can pass formed in the housing body 1212, and a housing side portion 1214P having a hole 1214H formed therein so that the coil drive unit 72C extends above the housing body 1212 and is disposed thereon. can be included.

[0123] For example, the housing 1210 may include a first housing side portion 1214P1 having a hole 1214H1 formed therein so that the coil drive unit 72C extends above the housing body 1212 and is disposed thereon, and a second housing side portion 1214P2 having a hole 1214H2 formed therein so that the coil drive unit 72C is disposed thereon. can be included.

[0124] According to the embodiment, the coil drive unit 72C is disposed on the housing side portion 1214P, the magnet drive unit 72M is disposed on the shaper member 1222, and the shaper member 1222 can move by the electromagnetic force between the coil drive unit 72C and the magnet drive unit 72M due to the voltage applied to the coil drive unit 72C. Accordingly, the shape of the lens member 1224 can be reversibly

[0125] deformed.​​​​​​​​​ The optical path passing through the lens member 1224 is changed by the deformation, and the OIS can be realized. Cut.

[0126] More specifically, the shaper member 1222 is a shell having holes through which light can pass. The lens may include a projection extending laterally from the lens body and the shaper body. The lens member 1224 is disposed under the shaper body, and the magnet driving unit 72M is disposed under the shaper body. For example, a part of the magnet driving unit 72M may be disposed on the protruding portion of the drive member 1222. The shaper 1222 is disposed on a protrusion disposed on one side of the shaper member 1222. The magnet drive element 1222 may be placed on a protrusion located on the other side of the magnet drive element 1222. The movable portion 72M may be arranged to be coupled to the shaper member 1222. For example, A groove is formed on the protruding portion of the bar member 1222, and the magnet driving unit 72M is inserted into the groove. It is possible.

[0127] On the other hand, the fixed prism 1232 may be a right-angle prism, and the image of the image stabilizer unit 1220 may be It can be disposed inside the magnet driving unit 72M. The prism cover 1234 is disposed so that the fixed prism 1232 is connected to the housing 1210. It can be tightly bound.

[0128] FIG. 20 shows an optical system according to a first embodiment of the present invention.

[0129] Referring to FIG. 20, the optical system according to the first embodiment of the present invention is A first lens group 2100 and a second lens group 2200 are sequentially arranged on the image side. Here, the lens group corresponds to the lens group described with reference to FIGS. obtain.

[0130] According to an embodiment of the present invention, the first lens group 2100 includes a plurality of lenses. The group 2100 is fixed relative to the image side. In this case, the first lens group 2100 may include at least two lenses. If the first lens group 2100 includes three or more lenses, the overall size of the optical system becomes large. According to an embodiment, the first lens group 2100 preferably includes two lenses. In this case, the first lens group 2100 may include a first lens and a second lens. do.

[0131] The first lens group 2100 can have a positive (+) refractive power. 0 has an effective focal length (EFL) in the range of more than 8 mm and less than 9 mm The first lens group 2100 is greater than 8 mm and smaller than 8.5 mm. The first lens group 2100 can have an effective focal length (EFL) in the range of 8 mm. ] and less than 8.1 [mm]. Preferably, the first lens group 2100 has an effective focal length of 8.0991 mm. It is possible.

[0132] The second lens group 2200 includes a plurality of lenses. If the second lens group 2200 includes three or more lenses, In this case, the size and weight of the second lens group 2200 increases, and the driving power required during movement increases. According to an embodiment, the second lens group 2200 preferably includes two lenses. The second lens group 2200 can include a third lens and a fourth lens.

[0133] The second lens group 2200 can include one filter. The filter is IR (infrared) The filter can be a rared filter. It can block light from near infrared rays, for example, light with a wavelength of 700 nm to 1100 nm. The image sensor 2400 is connected to the printed circuit board by a wire. Alternatively, the filters may be arranged in order from the object side to the image side, such as a filter for preventing foreign matter and a filter for preventing foreign matter. If the filter includes a filter for preventing foreign matter, the second lens group 2 When 200 moves, foreign particles may flow into the IR filter or image sensor 2400. This can prevent the intrusion of

[0134] The second lens group 2200 is movable in a direction parallel to the optical axis. The second lens group 2200 can move along the central axis of the lens. Accordingly, the second lens group 2200 can be adjusted for focusing. ) group can fulfill its role.

[0135] The second lens group 2200 can move from infinity to the shortest focus. When the second lens group 2200 moves from infinity to the shortest focus, it The separation between the first lens group 2200 and the second lens group 2200 can be increased. The second lens group 2200 can move from the closest focus to infinity. When moving, the separation between the first lens group 2100 and the second lens group 2200 may decrease.

[0136] In the optical system according to an embodiment of the present invention, the focus is adjusted by the movement of the second lens group 2200. It can be a fixed zoom optical system. Therefore, the magnification of the optical system does not have to increase or decrease due to the movement of the second lens group 2200.

[0137] According to an embodiment of the present invention, the movement stroke of the second lens group 2200 may be smaller than 0.02 [mm]. Here, the movement stroke may mean the distance that the lens group can move by the driving unit. Therefore, when the second lens group 2200 changes from the infinite focus to the shortest focus, it can move within a range smaller than 0.02 [mm]. Since the movement stroke of the second lens group 2200 is realized within 0.02 [mm], the driving unit for driving the second lens group 2200 can be miniaturized. Along with this, the camera module can be miniaturized, which is advantageous for mounting on a small electronic device such as a mobile terminal.

[0138] The second lens group 2200 can have a negative refractive power. The second lens group 2200 can have an effective focal length (EFL) in a range greater than -12 [mm] and less than -11 [mm]. The second lens group 2200 can have an effective focal length (EFL) in a range greater than -12 [mm] and less than -11.5 [mm]. Preferably, the second lens group 2200 can have an effective focal length of -11.4327 [mm].

[0139] The first lens group 2100 and the second lens group 2200 can move in a direction perpendicular to the optical axis. The first lens group 2100 and the second lens group 2200 can move in a direction horizontal to the image sensor 2400 plane. The first lens group 2100 and the second lens group 22 00 can move integrally when moving in a direction perpendicular to the optical axis. The first lens group 2100 and the second lens group 2200 can perform optical image stabilization (O ptical Image Stabilizer, OIS) while moving in a direction perpendicular to the optical axis.

[0140] According to an embodiment of the present invention, the optical system may have a TTL smaller than 7 [mm]. Here, TTL (Total Track Length) may mean the distance from the image sensor surface to the frontmost surface of the optical system. For example, TTL may mean the distance from the surface closest to the object side in the first lens group 2100 to the upper surface of the image sensor 2400 where light is incident. This may be interchangeably referred to as the overall length in this specification. The optical system according to an embodiment of the present invention has the second lens group 2200 disposed between the first lens group 2100 and the image sensor 2400 moving in the optical axis direction to focus, so the TTL is fixed. According to the embodiment, the optical system can have the TTL fixed within a range of 7 [mm].

[0141] According to an embodiment of the present invention, the plurality of lenses included in the first lens group 2100 and the second lens group 2200 may be lenses to which the D-cut technique is applied. The first lens group 2100 and the plurality of lenses included in the second lens group 2200 may be D-cut lenses in which a part of the upper side and the lower side are cut. At this time, for the plurality of lenses, the upper side and the lower side may have ribs and a part of the effective diameter may be cut, or only the ribs may be cut without cutting the effective diameter. According to one embodiment, the second lens group 2200 may include a lens in which the value obtained by dividing the major axis length of the effective diameter by the minor axis length of the effective diameter is 1. That is, the major axis length of the effective diameter and the minor axis length of the effective diameter are the same. For example, the third lens 2210, the fourth lens 2220, and the fourth lens In the case of 230, only the upper and lower ribs are cut, and the effective diameter does not need to be cut. In the case of circular lenses, the problem is that the lens volume increases depending on the vertical height. However, as in the embodiment of the present invention, D-cut is applied to the upper and lower parts of multiple lenses. By doing so, the vertical height can be reduced, which reduces the volume of the lens. can.

[0142] The present invention will now be described in more detail with reference to various embodiments.

[0143] FIG. 21 is a cross-sectional view of an optical system according to a first embodiment of the present invention at infinity. FIG. 22 is a cross-sectional view at an intermediate focus of the optical system according to the first embodiment of the present invention, and FIG. 23 1 is a cross-sectional view of an optical system according to a first embodiment of the present invention at the shortest focus.

[0144] Referring to FIGS. 21 to 23, the optical system is arranged from the object side to the image side. ) and includes a first lens group 2100 and a second lens group 2200 arranged in sequence. The lens group 2100 includes a first lens 2110 and a second lens 2120 arranged in order from the object side to the image side. 120, and the second lens group 2200 includes the third lens 22 10, a fourth lens 2220 and a filter 2300.

[0145] Here, the first lens 2110 includes a convex object-side surface 2112 and a concave image-side surface 2114. The second lens 2120 has a concave object-side surface 2122 and a concave image-side surface 2123. It may contain 4.

[0146] And the third lens 2210 can include a bulged object side surface 2212 and a recessed image side surface 2214. The fourth lens 2220 can include a bulged object side surface 2222 and a recessed image side surface 2 224.

[0147] In FIG. 2, when the distance between the first lens group 2100 and the second lens group 2200 is d1a and the distance between the second lens group 2200 and the sensor is d2a, the optical system can have an infinite focus. In FIG. 3, when the distance between the first lens group 2100 and the second lens group 2200 is d1b and the distance between the second lens group 2200 and the sensor is d2b, the optical system can have an intermediate focus. For example, the optical system can have a focus at a distance of 5 [m]. In FIG. 23, when the distance between the first lens group 2100 and the second lens group 2200 is d1c and the distance between the second lens group 2200 and the sensor is d2c, the optical system can have a shortest focus. For example, the optical system can have a focus at a distance of 1 [m].

[0148] When the optical system moves the second lens group 2200 from FIG. 21 through FIG. 22 to FIG. 23, the distance between the first lens group 2100 and the second lens group 2200 becomes farther, and the distance between the second lens group 2200 and the sensor decreases. Therefore, the relationships of d1a < d2b < d2c and d2a > d2b > d2c can be established.

[0149] FIG. 24 shows the longitudinal spherical aberration and astigmatic field for light with wavelengths of 435 nm, 486 nm, 546 nm, 587 nm, and 656 nm at the infinite focus of the optical system according to the first embodiment. (Longitudinal Sph The graph shows the measured curves and distortion. 25 is the intermediate focus of the optical system according to the first embodiment, and has wavelengths of 435 nm, 486 nm, 546 nm, and 58 Graphs measuring spherical aberration, astigmatism, and distortion for light with wavelengths of 7 nm and 656 nm. 26 shows the results of the first embodiment at the shortest focus of the optical system, which are 435 nm, 486 nm, and 54 Spherical aberration, astigmatism, and distortion for light with wavelengths of 6nm, 587nm, and 656nm This is a graph of the measurements.

[0150] Spherical aberration indicates the spherical aberration due to each wavelength, and astigmatism indicates the tangential aberration due to the height of the upper surface. Tangential plane and sagittal plane ) and the distortion aberration indicates the degree of distortion depending on the height of the upper surface. See Figures 24 to 26. This revealed that the spherical aberration was within -0.05mm to 0.05mm regardless of the wavelength. It was found that the astigmatism was within -0.25mm to 0.25mm regardless of the wavelength. This shows that the distortion is within 0 mm to 1 mm regardless of the wavelength.

[0151] FIG. 27 shows an optical system according to a second embodiment of the present invention.

[0152] Referring to FIG. 27, the optical system according to the embodiment of the present invention is (image) shows a first lens group 3100, a second lens group 3200, and a frame. The lens group includes a filter 3300. Here, the lens group is the same as the lens group described with reference to FIGS. It can correspond to a group of lenses.

[0153] According to an embodiment of the present invention, the first lens group 3100 includes one lens. 3100 is fixed with respect to the image side. That is, one lens can be fixed with respect to the image side. At this time, the first lens group 3100 can include at least one or more lenses. When the first lens group 3100 includes two or more lenses, the overall size of the optical system can become large. According to an embodiment, the first lens group 3100 preferably includes one lens. The first lens group 3100 can include a first lens. The first lens group 3100 can have a positive (+) refractive power.

[0154] The second lens group 3200 includes a plurality of lenses. The second lens group 3200 can include at least two four or more lenses. When the second lens group 3200 includes six or more lenses, the size and weight of the second lens group 3200 will increase, and the driving power during movement can become high. According to an embodiment, the second lens group 3200 preferably includes five lenses. The second lens group 3200 can include a second lens 3210, a third lens 3220, a fourth lens 3 230, a fifth lens 3240, and a sixth lens 3250.

[0155] The second lens group 3200 is movable in a direction horizontal to the optical axis. That is, a plurality of lenses are movable along the central axis of the lens. By moving the second lens group 3200, the focus can be adjusted. Accordingly, the second lens group 3200 can perform the role of a focusing group.

[0156] The second lens group 3200 can move from an infinite focus to the shortest focus. When the second lens group 3200 moves from the infinite focus to the shortest focus, it is with the first lens group 3100 The separation distance between the second lens group 3200 can be increased. The second lens group 3200 can move from the shortest focus to the infinity focus. During movement, the separation between the first lens group 3100 and the second lens group 3200 may decrease.

[0157] In the optical system according to the embodiment of the present invention, the focus is adjusted by moving the second lens group 3200. Therefore, the movement of the second lens group 3200 can change the zoom ratio of the optical system. The magnification may or may not increase or decrease.

[0158] According to an embodiment of the present invention, the movement stroke of the second lens group 3200 is 0.0104 [m m]. Here, the movement stroke is the distance that the lens group can move by the drive unit. Therefore, the second lens group 3200 changes from infinity to the shortest focus. When the second lens group 320 is rotated, it can move within a range of less than 0.0104 mm. Since the movement stroke is realized within 0.0104 [mm], the second lens group 320 The driving unit for driving the camera 0 can be miniaturized. This is advantageous for installation in small electronic devices such as mobile terminals. 00 can have a negative (-) refractive power.

[0159] The optical system can include a filter 3300. The filter 3300 is located in the sensor plane. In this embodiment of the present invention, the filter 3300 is fixed to the third level. The filter 3300 is an IR (infrared) filter. Accordingly, the filter 3300 filters out near-infrared light from entering the camera module. For example, it can block light with a wavelength of 700 nm to 1100 nm. The image sensor 3400 may be connected to a printed circuit board by a wire. The filters 3300 are filters for preventing foreign matter and filters arranged in order from the object side to the image side. If the filter 3300 includes a filter for preventing foreign matter, the second lens group 3 Foreign matter generated during the movement of 200 flows into the IR filter or image sensor 3400. This can prevent the intrusion of

[0160] The first lens group 3100, the second lens group 3200, and the filter 3300 are perpendicular to the optical axis. The first lens group 3100, the second lens group 3200 and the The filter 3300 can move in a direction parallel to the surface of the image sensor 3400. The lens group 3100, the second lens group 3200, and the filter 3300 are moved in a direction perpendicular to the optical axis. The first lens group 3100, the second lens group 3200, and the The filter 3300 moves in a direction perpendicular to the optical axis to provide optical image stabilization. It can perform optical image stabilizer (OIS).

[0161] According to an embodiment of the present invention, the optical system may have a TTL of less than 7 mm, where: TTL (Total Track Length) is the distance from the image sensor to the optical system. For example, TTL can refer to the distance to the eye plane. It may refer to the distance from the top surface of the image sensor 3400 to the top surface where light is incident. The optical system according to the embodiment of the present invention has a first lens group 3100 and an While the second lens group 3200 disposed between the image sensors 3400 moves in the optical axis direction To focus, the TTL is fixed. According to an embodiment, the optical system can have the TTL fixed within a range of 7 [mm]

[0162] According to an embodiment of the present invention, the plurality of lenses included in the first lens group 3100 and the second lens group 3200 May be lenses to which the D-cut technique is applied. The first lens group 3100 And the plurality of lenses included in the second lens group 3200 may be D-cut lenses in which a part of the upper side and the lower side are cut At this time, for the plurality of lenses, the upper side and the lower side may have ribs And a part of the effective diameter is cut or only the ribs are cut without cutting the effective diameter. According to one embodiment The second lens group 3200 may include a lens in which the value obtained by dividing the major axis length of the effective diameter by the minor axis length of the effective diameter is 1 That is, the major axis length and the minor axis length of the effective diameter may be the same For example, in the case of the third lens 3210, the fourth lens 3220, and the fourth lens 3 230, only the ribs on the upper side and the lower side are cut, and the effective diameter may not be cut . In the case of a circular type lens, there is a problem that the volume of the lens increases depending on the vertical height However, as in the embodiment of the present invention, by applying D-cut to the upper side and the lower side of the plurality of lenses The vertical height can be reduced, so the volume of the lens can be reduced

[0163] Hereinafter, various embodiments of the present invention will be described in more detail by taking examples

[0164] FIG. 28 is a cross-sectional view at infinity of the optical system according to the second embodiment of the present invention And FIG. 29 is a cross-sectional view at the shortest focus of the optical system according to the second embodiment of the present invention​​

[0165] Referring to FIGS. 28 and 29, the optical system includes a first lens group 3100 and a second lens group 3200 that are sequentially arranged from the object side to the image side (image). The first lens group 3100 includes a first lens 3110 that is sequentially arranged from the object side to the image side, and the second lens group 3200 includes a second lens 3210, a third lens 3220, a fourth lens 3230, a fifth lens 3240, and a sixth lens 3250 that are sequentially arranged from the object side to the image side. Here, the first lens 3110 can include a bulged object side surface 3112 and a bulged image side surface 3114. And the second lens 3210 can include a concave object side surface 3212 and a concave image side surface 3214. The third lens 3220 can include a bulged object side surface 3222 and a concave image side surface 3224. The fourth lens 3230 can include a concave object side surface 3232 and a bulged image side surface 3234. The fifth lens 3240 can include a concave object side surface 3242 and a concave image side surface 3244. The sixth lens 3250 can include a bulged object side surface 3252 and a bulged image side surface 3254.

[0166] When the distance between the first lens group 3100 and the second lens group 3200 is d1a in FIG. 28 and the distance between the second lens group 3200 and the sensor is d2a, the optical system can have an infinite focus. When the distance between the first lens group 3100 and the second lens group 3200 is d1b in FIG. 29 and the distance between the second lens group 3200 and the sensor is d2b, the optical system can have a shortest focus. For example, the optical system can have a focus at a distance of 1 [m].

[0167]

[0168] ​​​​​​​​​​​​​

[0169] When the second lens group 3200 is moved from FIG. 28 to FIG. 29, the optical system The distance between the lens group 3100 and the second lens group 3200 becomes greater, and The distance between the sensors decreases.<d2bおよびd2a> d2b relationship can be established.

[0170] FIG. 30 shows the wavelengths of 435 nm, 486 nm, 546 nm, and 586 nm at infinity for the optical system according to the second embodiment. Longitudinal Spherical Aberration for 587nm and 656nm wavelength light erical aberration, astigmatic field The graph shows the measured curves and distortion. 31 is the shortest focus of the optical system according to the second embodiment, and Graphs measuring spherical aberration, astigmatism, and distortion for light with wavelengths of 7 nm and 656 nm. It is Fu.

[0171] Spherical aberration indicates the spherical aberration due to each wavelength, and astigmatism indicates the tangential aberration due to the height of the upper surface. Tangential plane and sagittal plane ) and the distortion aberration indicates the degree of distortion depending on the height of the upper surface. For reference, the spherical aberration is within -0.04mm to 0.08mm regardless of the wavelength. It can be seen that the astigmatism is within -0.25mm to 0.25mm regardless of the wavelength. It can be seen that the distortion is within the range of -0.2mm to 2mm regardless of the wavelength.

[0172] Hereinafter, a camera module 400 according to an embodiment of the present invention will be described with reference to FIGS. 32 and 33. The camera module described below is based on the configuration of the camera shown in FIGS. 9.

[0173] 32 is a diagram illustrating a camera module according to an embodiment of the present invention. 3 is a diagram illustrating a camera module according to another embodiment of the present invention.

[0174] 32 and 33, a camera module 4000 according to an embodiment of the present invention , a substrate 4100, a sensor 4200, a housing 4300, a first lens assembly 4400, The camera module may include a second lens assembly 4500 and a driving unit 4600. The ball 4000 can include a plurality of balls 4700 and covers 4800. Ball 4700 can include a first ball 4710 and a second ball 4720 .

[0175] The sensor 4200 may be disposed on the substrate 4100. The substrate 4100 may be The housing 4300 may be disposed on the substrate 4100. The substrate 4100 may be structurally coupled to a housing 4300. A cover 480 may be provided on the substrate 4100. 0 may be disposed. The substrate 4100 may be structurally coupled to the cover 4800.

[0176] A circuit pattern may be arranged on the substrate 4100. Accordingly, the substrate 4100 is The substrate 4100 may be a F-PCB, a PCB, or a substrate that can be connected to a circuit. The substrate 4100 may be a substrate 4100. The circuit pattern disposed on the substrate 4100 may be a sensor 4200. An external power source can be electrically connected to drive the sensor 4200. The arranged circuit pattern electrically connects the driving unit 4600 and the control element that controls the driving unit 4600. In addition to the above examples, the circuit pattern disposed on the substrate 4100 can be connected to can electrically couple the various elements of the camera module 4000.

[0177] The sensor 4200 can be an image sensor. The sensor 4200 is mounted on top of the substrate 4100. The sensor 4200 can be arranged between the first lens assembly 4400 and the second lens assembly 4400. The sensor 4200 can be disposed on the optical axis of the first lens assembly 4400 and the second lens assembly 4500. 2. Performs the function of converting light that passes through the lens assembly 4500 into image data can be done.

[0178] The housing 4300 may be disposed on top of the substrate 4100. The housing 4300 may include an internal It may contain spaces.

[0179] The housing 4300 includes a body portion 4310, a moving portion 4320, and a fixed portion 4330. This can be done.

[0180] The body part 4310 can be coupled to the first lens assembly 4400. The body part 4310 is The body 4310 may be movable along a direction perpendicular to the upper surface of the sensor 4200. It may be movable in a horizontal direction.

[0181] The moving part 4320 can be coupled to the second lens assembly 4500. The moving part 4320 can be coupled to the second holder of the lens assembly 4500. The moving part 4320 moves in the optical axis direction. Therefore, the moving part 4320 moves the second lens assembly 4500 in the optical axis direction. can be moved to

[0182] The moving part 4320 may be coupled to the body part 4310. The first ball 4710 may be disposed between the moving part 4320 and the optical axis. The first ball 4710 can be supported so as to be movable in the direction. The ball 4710 may be rotatably accommodated in the moving part 4320. At this time, the moving part 4320 The first ball 4710 may include a groove that can accommodate the first ball 4710. The first ball 10 can be movably accommodated in the body 4310. At this time, the body 4310 is The moving part 4320 or the body part 4310 may include a groove for receiving the moving part 4320 or the body part 4310. The recessed groove may be configured to accommodate, but is not limited to, one first ball 4710. No. The ball may be spherical.

[0183] The fixing portion 4330 may be fixed to the upper surface of the substrate 4100. The fixing portion 4330 may be a body portion. The fixing portion 4330 may include a support surface that supports the body portion 4310. The support surface can be a surface perpendicular to the optical axis. The body part 4310 may be placed on the support surface of the fixing part 4330. A second ball 4720 may be disposed between the fixing portion 4330 and the body portion 4310. The roller 4720 can support the body 4310 so that it can move in a direction perpendicular to the optical axis. That is, the second ball 4720 moves along the support surface of the body portion 4310 of the fixed portion 4330. The second ball 4720 may be configured in plural. 720 can be rotatably accommodated in the fixed part 4330. At this time, the fixed part 4330 is In another embodiment, the second ball 4720 may include a groove for receiving the second ball 4720. The body portion 4310 can be movably accommodated in the second ball 4720. The grooves included in the fixing part 4330 or the body part 4310 may include a groove that can accommodate the fixing part 4330. It may be configured to accommodate, but is not limited to, one second ball 4720. The balls may be spherical.

[0184] The first lens assembly 4400 may include a lens and a first holder for accommodating the lens. The second lens assembly 4500 includes a lens and a second holder that accommodates the lens. The first lens assembly 4400 and the second lens assembly 4500 are as described above. This may correspond to the first lens group and the second lens group described with reference to the drawings. A detailed explanation will be omitted.

[0185] The drive unit 4600 can move the second lens assembly 4500 along the optical axis direction. The driving unit 4600 moves the moving unit 4320 contained in the housing 4300 along the optical axis direction. The driving unit 4600 can be moved by the moving unit 4300 included in the housing 4300. 20 along the optical axis direction to move the second lens assembly 4500. It is possible.

[0186] The drive unit 4600 can move the housing 4300 in a direction perpendicular to the optical axis. The driving unit 4600 rotates the body 4310 contained in the housing 4300 in a direction perpendicular to the optical axis. The driving unit 4600 is a cylinder included in the housing 4300. By moving the body part 4310 along a direction perpendicular to the optical axis, the first lens assembly 4 400 and the second lens assembly 4500 can be moved.

[0187] The drive unit 4600 can include a magnet 4610, a first coil 4620, and a second coil 4630. It can be included.

[0188] The magnet 4610 can be coupled to the housing 4300. The magnet 4610 can be arranged in the hou ding 4300. The magnet 4610 can be arranged in the body part 43 of the housing 43 10. The magnet 4610 can be coupled to the housing 4300 and move integrally therewith. The magnet 4610 can be coupled to the body part 4310 of the housing 4300 and move integrally therewith. The magnet 4610 can be arranged opposite to the first coil 4620. The magnet 4610 can face the first coil 4620. The magnet 46 10 can be arranged spaced apart from the first coil 4620. The magnet 4610 can be arranged opposite to the second coil 4 630. The magnet 4610 can face the second coil 4630. The magnet 4610 can be arranged spaced apart from the second coil 4630.

[0189] The magnet 4610 can be composed of one or more. According to one embodiment, as shown in FIG. 33 The magnet 4610 can be composed of one. One magnet 4610 can be arranged opposite to the corresponding first coil 4620 and second coil 4630. In this case, The first coil 4620 and the second coil 4630 can also be composed of one each. According to another embodiment As shown in FIG. 32, the magnet 4610 can be composed of two. Two The magnets 4610 may be arranged facing each other with the optical axis as the reference. The first coil 4620 and the second coil 4630 may also each be configured with two coils. The net 4610 corresponds to one first coil 4620 and one second coil 4630. Alternatively, the magnets 4610 may be configured in three or more pieces.

[0190] The magnet 4610 may be fixed to the housing 4300 by adhesive. The magnet 4610 can be coupled to the housing 4300 through various fastening methods.

[0191] The first coil 4620 may be coupled to at least one side of the second lens assembly 4500 . The first coil 4620 may be disposed on the outer surface of the second lens assembly 4500. The second lens assembly 4620 can be placed in a second holder included in the second lens assembly 4500. The lens 4620 may be disposed on the outer surface of the second holder included in the second lens assembly 4500. The first coil 4620 may be disposed opposite the magnet 4610. 0 can be disposed on the second lens assembly 4500 facing the magnet 4610.

[0192] The first coil 4620 is a pattern coil (pattern coil) on the outer surface of the second lens assembly 4500. The first coil 4620 can be formed by a second lens assembly 450. Fine pattern coil (fine pattern coil) formed integrally on the outer surface of When a current is applied to the first coil 4620, the first coil 4620 becomes a magnet. According to an embodiment, the first coil 4620 can be in electromagnetic interaction with the first coil 4610. When a current is applied to the first coil 4620, the second lens assembly 4500 coupled to the first coil 4620 can move along the optical axis away from the sensor 4200, i.e. The camera module 4000 applies a current to the first coil 4620 to perform AF. The first coil 4620 can perform the function of an AF coil. can be done.

[0193] The first coil 4620 may be one or more. As mentioned above, the first coil 4620 can be configured as one coil. According to another embodiment, as shown in FIG. The first coil 4620 may be configured with two coils. The two first coils 4620 are arranged with the optical axis as the reference. Alternatively, the first coil 4620 may be configured with three or more first coils. That's fine.

[0194] The second coil 4630 may be coupled to at least one side of the housing 4300. The second coil 4630 may be disposed on the fixed portion 4330 of the housing 4300. The second coil 4630 may be disposed opposite the magnet 4610. The fixing portion 4330 of the housing 4300 may be disposed opposite to the fixing portion 4330 of the housing 4300.

[0195] The second coil 4630 is a pattern coil (pat The second coil 4630 may be formed of a fixed tern coil. A fine pattern coil (fine pattern coil) formed integrally with the part 4330 When a current is applied to the second coil 4630, the second coil 4630 becomes a magnet. It can interact electromagnetically with the net 4610. According to the embodiment, when a current is applied to the second coil 463 0, the magnet 46 that interacts electromagnetically with the second coil 4630 10 can be moved. Since the magnet 4610 is coupled to the body portion 43 of the housing 4300 10, the body portion 4310 of the housing 4300 can be moved through the electromagnetic interaction between the second coil 4630 and the magnet 4610. The body portion 4310 of the housing 43 00 is coupled to the first lens assembly 4400 and is coupled to the second lens assembly 4500 through the moving portion 4320 So, the electromagnetic interaction between the second coil 4630 and the mag net 4610 can move the first lens assembly 4400 and the second lens assembly 4 500 in a direction perpendicular to the optical axis. Through this, the camera module 4000 can perform the OIS (optical image stabilization) function. The second coil 4630 can perform the function of the coil for O IS. The second coil 4630 can be composed of one or more. According to one embodiment, as shown in FIG. 33

[0196] The second coil 4630 can be composed of one. One second coil 4630 can be arranged at the fixed portion 4330 of the hau zing 4300. According to another embodiment, as shown in FIG. 32 The first coil 4620 can be composed of two. Two second coils 4630 can be arranged at the fixed portion 4330 of the housing 4300 facing each other with respect to the optical axis. So In addition, the second coil 4630 may be composed of three or more. The cover 4800 can be arranged on the upper part of the housing 4300. The cover 4800 is a lens

[0197] ​An opening is provided so that a part of the housing 4300 to which the assembly is connected can be exposed. The opening of the cover 4800 is provided to be separated from a part of the housing 4300. For example, a direct contact with the part of the housing 4300 exposed through the opening can be used. The diameter of the opening may be larger than the diameter of the housing 4300 in the direction perpendicular to the optical axis. This is to provide space for movement.

[0198] The cover 4800 may include a metal material. The cover 4800 may include a ferrite plate (fe The cover 4800 can be made of a ferrite plate. The cover 4800 can be made of a ferrite plate. It can block external electromagnetic waves from entering the interior.

[0199] Therefore, the cover 4800 is called a "shielded can." However, the material of the cover 4800 is not limited to this. The cover 4800 may include a plastic material. The cover 4800 does not perform an electromagnetic wave shielding function.

[0200] FIG. 34 is a diagram illustrating the operation of a driving unit according to an embodiment of the present invention.

[0201] Referring to FIG. 34, a camera module 4000 according to an embodiment of the present invention includes a substrate 4100. , a sensor 4200, a first lens assembly 4400, and a second lens assembly 4500. It can be done.

[0202] As shown in FIG. 34(a), the driving unit 4600 includes a first coil 4620 and a magnet. The second lens assembly 4500 is moved in the direction of the optical axis through electromagnetic interaction with the lens 4610. It can do this. Through this, the camera module 4000 can perform the AF function. Even if the second lens assembly 4500 moves in the optical axis direction by performing the AF function, the first lens assembly 4400 does not move along the optical axis direction. The first lens assembly 4400 is fixed at a predetermined distance from the sensor 4200 (and the substrate 4100). When performing the AF function , since the first lens assembly 4400 is fixed, the TTL of the camera module 4000 can be fixed. On the other hand, a collision prevention member can be arranged between the first lens assembly 4400 and the second lens assembly 4500. The collision prevention member can prevent the second lens assembly 450 0 from colliding with the first lens assembly 4400 and damaging the lens while moving along the optical axis direction during the AF function. It can also prevent the first lens assembly 4400 and the second lens assembly 4500 from colliding due to an external impact and damaging the lens except during the AF function.

[0203] As shown in FIG. 34(b), the drive unit 4600 can move the body portion 4310 of the housing 4300 in a direction perpendicular to the optical axis through the electromagnetic interaction between the second coil 4630 and the magnet 4610. Since the first lens assembly 4400 and the second lens assembly 4500 are coupled to the body portion 4310, the electromagnetic interaction between the second coil 4630 and the magnet 4610 can move the first lens assembly 4400 and the second lens assembly 45 00 together along a direction perpendicular to the optical axis. Through this, the camera module 4000 can perform the OIS function.

[0204] FIG. 35 is a drawing for explaining the operation of the drive unit according to another embodiment of the present invention.

[0205] Referring to FIG. 35, the camera module 4000 according to an embodiment of the present invention includes a substrate 4100 , a sensor 4200, a first lens assembly 4400, a second lens assembly 4500, and a third lens assembly 4550. Here, the third lens assembly 4550 can be a filter.

[0206] As shown in FIG. 35(a), the driving unit 4600 moves the second lens assembly 4500 in the optical axis direction through the electromagnetic interaction between the first coil 4620 and the magnet 4610. Through this, the camera module 4000 can perform an AF function. Even if the second lens assembly 4500 moves in the optical axis direction due to the performance of the AF function, the first lens assembly 4400 and the third lens assembly do not move along the optical axis direction. The first lens assembly 4400 and the third lens assembly 4550 are fixed at a predetermined distance from the sensor 4200 (and the substrate 4100). When the AF function is performed, since the first lens assembly 44 00 is fixed, the TTL of the camera module 4000 can be fixed. On the other hand, a collision prevention member can be disposed between the first lens assembly 4400 and the second lens assembly 4500, and between the second lens assembly 4500 and the third lens assembly 4550. The collision prevention member can prevent the second lens assembly 4500 from colliding with the first lens assembly 4400 and the third lens assembly 4550 and damaging the lens while the second lens assembly 4500 moves along the optical axis direction during the AF function. Even when there is no AF function, the first lens assembly 4400 and the third lens assembly 4550 and the second lens assembly 4500 can be prevented from colliding due to an external impact. This can prevent the lens from being damaged. When there is no AF function, the first lens assembly 4400 and the third lens assembly 4550 and the second lens assembly 4500 may collide due to an external impact. This can prevent the lens from being damaged. This can prevent the lens from being damaged.

[0207] As shown in FIG. 35(b), the driving unit 4600 includes a second coil 4630 and a magnet. The body 4310 of the housing 4300 is perpendicular to the optical axis through electromagnetic interaction with the light source 4610. The body part 4310 is provided with a first lens assembly 4400, a second lens assembly 4400, and a third lens assembly 4400. The second lens assembly 4500 and the third lens assembly 4550 are combined, The electromagnetic interaction between the coil 4630 and the magnet 4610 is The second lens assembly 4500 and the third lens assembly 4550 are integrally mounted perpendicular to the optical axis. This allows the camera module 4000 to move along the OIS Able to perform functions.

[0208] FIG. 36 is a diagram illustrating the structure of a housing according to an embodiment of the present invention. 7 is a view for explaining the structure of a housing according to another embodiment of the present invention.

[0209] The housing 4300 shown in FIGS. 36 and 37 has a body portion 4 of the housing 4300. 310. According to one embodiment, as shown in FIG. 36, the housing 430 The body portion 4310 of the housing 4300 may be integrally formed. The unit 4310 is connected to the first lens assembly 4400 and the second lens assembly 4500. The second lens assembly 4500 can be coupled to a moving part 4320 through a driving part 4600. The housing 4300 has a body 4310 integrally formed with the optical axis. It can be moved.

[0210] According to another embodiment, as shown in FIG. 37, the body 431 of the housing 4300 0 may be composed of a first body portion 4311 and a second body portion 4312. First body portion 4311 The second body portion 4312 can be coupled to the first lens assembly 4400. The second lens assembly 4500 can be coupled to a moving part 4320 which is coupled to the second lens assembly 4500. The driving unit 4600 moves along the optical axis in the internal storage space of the second body unit 4312. The first body portion 4311 and the second body portion 4312 can be configured separately. The first body part 4310 and the second body part 4310 may be configured to be structurally connectable. Collision prevention member to prevent collision between lens assembly 4400 and second lens assembly 4500 It may be integrally formed with the portion of the second body 4312 that is to be coupled to the first body 4311 .

[0211] The above description has been given mainly on the examples, but these are merely examples and do not limit the present invention. However, a person having ordinary skill in the art to which the present invention pertains will be able to easily understand the essential characteristics of this embodiment. It is understood that various modifications and applications not exemplified above are possible without departing from the scope of the present invention. For example, each component specifically shown in the embodiment can be modified and implemented. and the differences relating to such modifications and applications are defined in the appended claims. These and other aspects of the present invention should be construed as being included within the scope of the present invention.

Claims

1. A base, a first lens assembly disposed within the base and including a first lens group and a first lens support unit to which the first lens group is fixed, a second lens assembly disposed within the base and including a second lens group and a second lens support unit to which the second lens group is fixed, and a driving unit configured to move the second lens assembly, wherein a first stopper member and a second stopper member are formed on an inner wall of the second lens support unit at intervals greater than a height of the first lens assembly along a moving direction of the second lens support unit, the first lens assembly is accommodated between the first stopper member and the second stopper member within the second lens support unit, and the second lens assembly moves together with the first lens assembly within the base, a camera device.

2. The driving unit includes a coil driving unit disposed on at least one of a first inner wall of the base and a second inner wall of the base facing the first inner wall, and a magnet driving unit disposed on the second lens support unit to face the coil driving unit, wherein the second lens assembly moves along the first inner wall and the second inner wall due to an interaction between the coil driving unit and the magnet driving unit, the camera device according to Claim 1.

3. The camera device further includes a magnet disposed on the first lens assembly, and a first yoke and a second yoke fixed at a predetermined interval on one surface of the base disposed to face the magnet, wherein an attractive force acts between the magnet and the first yoke or between the magnet and the second yoke depending on a position of the second lens assembly, the camera device according to Claim 2.

4. In a first zooming mode, an attractive force acts between the magnet of the first lens assembly that has moved together with the second lens assembly along a first direction and the first yoke, and in a second zooming mode, an attractive force acts between the magnet of the first lens assembly that has moved together with the second lens assembly along a second direction opposite to the first direction and the second yoke, the camera device according to Claim 3.

5. The first lens assembly is ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The first lens assembly moves along the first direction until it contacts the first stopper member. It further moves, and the first lens assembly is attracted by the gravitational force acting between the magnet and the second yoke. The first lens assembly moves along the second direction until it contacts the second stopper member. The camera device according to claim 4, wherein the first lens assembly further moves. **Claim 6** The second lens assembly performs focusing in a state where the first lens assembly contacts the first stopper member or in a state where the first lens assembly contacts the second stopper member. The camera device according to claim 5. **Claim 7** A guide portion is disposed so as to be adjacent to at least one of the first inner wall and the second inner wall of the base. A groove portion corresponding to the guide portion is formed on the outer peripheral surface of the second lens support unit. A ball is disposed between the guide portion and the groove portion. The camera device according to claim 1. **Claim 8** The camera device according to claim 1, further including a guide pin fixed to the base so as to be parallel to the optical axis, and the second lens support unit moves along the guide pin. **Claim 9** Including a first lens group and a second lens group that are sequentially arranged from the object side to the image side and include a plurality of lenses. The first lens group is fixed with respect to the image side. The second lens group is movable in the optical axis direction. When moving from an infinite focus to a shortest focus, the separation distance between the first lens group and the second lens group increases. The first lens group has a positive refractive power. The second lens group has a negative refractive power. The TTL (total track length) is fixed in a range smaller than 7 [mm]. The movement stroke of the second lens group when focusing from the infinite focus to the shortest focus is within 0.02 mm. The optical system. **Claim 10** A substrate; A sensor disposed on the upper portion of the substrate; A housing disposed on the upper portion of the substrate and including an internal space; A first lens assembly including at least one lens and coupled to the housing; A second lens assembly including at least one lens, housed in the internal space, and coupled to the housing; and A driving unit that moves the second lens assembly along the optical axis direction or moves the housing along a direction perpendicular to the optical axis. The driving unit [[ID=;]]is ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ A magnet coupled to the housing; A first coil disposed opposite the magnet and coupled to at least one side of the second lens assembly; and A second coil disposed opposite the magnet and coupled to one side of the housing; A camera module comprising ​ ​

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