CN221101227U - Aperture module and camera module having the same - Google Patents

Abstract

The present disclosure relates to an aperture module and a camera module including the same, the aperture module including: a base portion; a plurality of blades disposed on the base portion; and an aperture driving unit including a magnet unit configured to linearly reciprocate on the base portion and to drive the plurality of blades. The magnet unit includes a driving magnet having an odd number of polarized poles along a moving path of the magnet unit. The aperture module according to the present disclosure can precisely realize three diaphragm diameters.

Description

Aperture module and camera module having the same

Cross Reference to Related Applications

The present application claims the priority of korean patent application No. 10-2022-0187251 filed at 12 months 28 of 2022 and korean patent application No. 10-2023-0027958 filed at 3 months 2 of 2023, the entire disclosures of which are incorporated herein by reference for all purposes.

Technical Field

The present disclosure relates to a camera module having an aperture module.

Background

Recently, camera modules have been used in standard portable electronic devices such as smart phones, tablet PCs, and laptop computers. In the case of a general digital camera, a mechanical aperture is provided to change the amount of incident light therein according to an image photographing environment, but in the case of a camera module used in a small-sized product such as a portable electronic device, it may be difficult to separately provide the aperture due to structural characteristics and space limitations.

For example, the weight of the camera module may increase due to various portions for driving the diaphragm, and thus the autofocus function may deteriorate. Further, when the diaphragm is provided with a power connection unit such as a coil for driving the diaphragm, a problem may occur such as the power connection unit being photographed according to vertical movement of the lens during auto-focusing.

Furthermore, since it may be desirable that the aperture modules having various aperture diameters are located in a narrow space, a correct aperture diameter may be suppressed due to the position of the driving unit.

Disclosure of utility model

This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In one general aspect, an aperture module includes: a base portion; a plurality of blades disposed on the base portion; and an aperture driving unit including a magnet unit configured to linearly reciprocate on the base portion and to drive the plurality of blades. The magnet unit includes a driving magnet having an odd number of polarized poles along a moving path of the magnet unit.

An odd number of polarized poles may be three.

The plurality of vanes may be configured to form three different aperture sizes when combined.

The diaphragm module may further include a yoke disposed on the base portion and facing the driving magnet along a moving path of the magnet unit.

The magnet unit may be capable of being fixed to any one of three different positions on the moving path by an attractive force between the driving magnet and the yoke.

The yoke may have an expanded portion opposite to the driving magnet, the expanded portion having a height in the optical axis direction larger than that of the other portions of the yoke.

The expansion portion may be disposed in a middle portion of the moving path of the magnet unit.

The yokes may have holding portions facing the sides of the driving magnet on both ends, respectively, and/or a portion of the yokes may have a greater height in the optical axis direction than other portions of the yokes.

The camera module may include a housing having a lens module, and the aperture module described above coupled to the lens module.

In another general aspect, a camera module includes: a housing having a lens module; and a diaphragm module coupled to an upper portion of the lens module, the diaphragm module including a base portion, a plurality of blades provided on the base portion, and a diaphragm driving unit including a magnet unit configured to linearly reciprocate on the base portion and to drive the plurality of blades. The magnet unit includes: a driving magnet having an odd number of polarized poles along a moving path of the magnet unit; and a driving coil disposed along a moving path of the magnet unit to face the driving magnet.

An odd number of polarized poles may be three.

The driving coils may be two driving coils disposed simultaneously and opposite to the two poles of the driving magnet, respectively.

The yoke may be disposed on the base portion and face the driving magnet along a moving path of the magnet unit.

The magnet unit may be capable of being fixed to any one of three different positions on the moving path by an attractive force between the driving magnet and the yoke.

The yoke may have an expanded portion in which a portion opposite to the driving magnet is greater in height in the optical axis direction than other portions.

The expansion portion may be disposed between the two driving coils.

A position sensor configured to sense a position of the magnet unit may be provided in the housing.

In another general aspect, a camera module includes: a housing; a lens module accommodated in the housing; and an aperture module configured to form three different sized apertures using the plurality of blades. On a surface of the housing parallel to the optical axis direction, a first OIS driving coil is provided to drive the lens module in a first direction perpendicular to the optical axis direction, a second OIS driving coil is provided to drive the lens module in a second direction perpendicular to the optical axis direction and the first direction, an AF driving coil is provided to drive the lens module in the optical axis direction, and two diaphragm driving coils are provided to drive the plurality of blades, respectively.

Other features and aspects will become apparent from the following detailed description, the accompanying drawings, and the claims.

Drawings

Fig. 1 is a perspective view of an example of a camera module in accordance with one or more embodiments.

Fig. 2 is an exploded perspective view of an example of a camera module in accordance with one or more embodiments.

Fig. 3 is a partial perspective view of an example of a camera module in accordance with one or more embodiments.

Fig. 4 is an exploded perspective view of an example of an aperture module in accordance with one or more embodiments.

Fig. 5A to 5C are perspective views showing examples of a state in which the diaphragm module is driven to change the diameter of the inlet hole.

Fig. 6 and 7 are reference views illustrating a positional relationship between a yoke and a driving magnet according to one or more embodiments.

Throughout the drawings and detailed description, the same reference numerals will be understood to refer to the same or like elements, features and structures unless otherwise described or provided. The figures may not be to scale and the relative sizes, proportions, and depictions of elements in the figures may be exaggerated for clarity, illustration, and convenience.

Detailed Description

The following detailed description is provided to assist the reader in a comprehensive understanding of the methods, apparatus, and/or systems described herein. However, various alterations, modifications and equivalents of the methods, devices and/or systems described herein will be apparent after an understanding of the present disclosure. For example, the order within operations described herein and/or the order of operations described herein is merely an example and is not limited to the order set forth herein, but may be altered as will be apparent after an understanding of the disclosure, other than the order within operations that must occur in a particular order and/or the order of operations that must occur in a particular order. As another example, the order of operations and/or the order within operations may be performed in parallel, except for at least a portion of the order of operations that must occur in a sequence (e.g., a particular sequence) and/or at least a portion of the order within operations that must occur in a sequence (e.g., a particular sequence). Furthermore, descriptions of well-known features may be omitted for the sake of clarity and conciseness after understanding the present disclosure.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent upon reading the present disclosure. The use of the term "may" herein with respect to an example or embodiment (e.g., with respect to what the example or embodiment may include or implement) means that there is at least one example or embodiment that includes or implements such feature, as all examples or embodiments are not limited thereto.

In the entire specification, when a component or element is described as being "on", "connected to", "coupled to" or "coupled to" another component, element or layer, it may be directly (e.g., in contact with) on, directly connected to, directly coupled to or directly coupled to the other component, element or layer, or there may be one or more other components, elements, layers interposed therebetween. When a component or element is described as being "directly on," "directly connected to," or "directly coupled to" another component or element, there may be no other component or element intervening between them. Likewise, expressions such as "between …" and "immediately between …" and "adjacent to …" and "immediately adjacent to …" may also be interpreted as described in the foregoing.

Although terms such as "first," "second," and "third," or A, B, (a), (b), etc., may be used herein to describe various elements, components, regions, layers, or sections, these elements, components, regions, layers, or sections are not limited by these terms. Each of these terms is not intended to limit, for example, the nature, order, or sequence of the corresponding member, component, region, layer, or section, but is merely intended to distinguish the corresponding member, component, region, layer, or section from other members, components, regions, layers, or sections. Thus, a first member, first component, first region, first layer, or first portion referred to in the examples may also be referred to as a second member, second component, second region, second layer, or second portion without departing from the teachings of the examples described herein.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The articles "a," "an," and "the" are intended to also include the plural forms unless the context clearly indicates otherwise. As a non-limiting example, the terms "comprises" or "comprising," "including," and "having" or "having" specify the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, and/or groups thereof, or groups thereof. Furthermore, although an embodiment may describe the presence of a stated feature, quantity, operation, component, element, and/or combination thereof by way of example only, that "comprising" or "including," "including," and "having" or "having," other embodiments may exist that do not exist for one or more of the stated feature, quantity, operation, component, element, and/or combination thereof.

The shapes of the illustrations as a result of manufacturing techniques and/or tolerances, are to be expected to vary. Accordingly, examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shapes that occur during manufacture.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs in the context of this disclosure. Terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

An aspect of the present disclosure is to provide an aperture module capable of precisely realizing three aperture diameters by fixing a driving unit in a precise position to significantly reduce a weight increase due to the use of the aperture module, and a camera module including the same.

Fig. 1 is a perspective view of an example of a camera module in accordance with one or more embodiments. Fig. 2 is an exploded perspective view of an example of a camera module in accordance with one or more embodiments. Fig. 3 is a perspective view illustrating a portion (with a housing removed) of an example of a camera module in accordance with one or more embodiments.

Referring to fig. 1 to 3, a camera module 1000 according to one or more embodiments includes a lens module 200, a carrier 300, a guide portion 400, an aperture module 500, a housing 110, and an outer case 120.

The lens module 200 may include a lens barrel 210 having a plurality of lenses for photographing a subject and a holder 220 accommodating the lens barrel 210. A plurality of lenses are disposed inside the lens barrel 210 along the optical axis. The lens module 200 is accommodated in the carrier 300.

The lens module 200 is configured to be movable in the optical axis direction for auto-focusing. For example, the lens module 200 may be moved together with the carrier 300 in the optical axis direction by a focus adjustment unit.

The focus adjustment unit may include a magnet 710 generating a driving force in the direction of the optical axis and a coil 730 (e.g., an Auto Focus (AF) driving coil). Further, a position sensor 750 (e.g., a hall sensor) may be provided to sense the optical axis direction position of the lens module 200 (or the carrier 300).

The magnet 710 is mounted on the carrier 300. For example, the magnet 710 may be mounted on one side of the carrier 300.

The coil 730 and the position sensor 750 are mounted on the housing 110. For example, the coil 730 and the position sensor 750 may be fixed to the housing 110 to face the magnet 710. The coil 730 and the position sensor 750 may be disposed on the substrate 900, and the substrate 900 may be mounted on the housing 110.

The magnet 710 is a moving member mounted on the carrier 300, and moves in the optical axis direction together with the carrier 300. The coil 730 and the position sensor 750 are fixed members fixed to the housing 110.

When power is applied to the coil 730, the carrier 300 may be moved in the optical axis direction by electromagnetic influence between the magnet 710 and the coil 730. Further, the position sensor 750 may sense a position of the carrier 300 in the optical axis direction.

Since the lens module 200 is accommodated in the carrier 300, the lens module 200 is also moved together with the carrier 300 in the optical axis direction by the movement of the carrier 300.

The rolling member B is disposed between the carrier 300 and the housing 110 to reduce friction between the carrier 300 and the housing 110 when the carrier 300 moves. The rolling members B may be in the form of balls.

Rolling members B are provided on both sides of the magnet 710 (or coil 730).

The yoke may be mounted on the substrate 900. For example, a yoke may be provided to face the magnet 710 with the coil 730 interposed therebetween.

Between the yoke and the magnet 710, an attractive force acts in a direction perpendicular to the optical axis direction.

Accordingly, the rolling member B may be maintained in contact with the carrier 300 and the housing 110 by the attractive force between the yoke and the magnet 710.

In addition, the yoke also serves to focus the magnetic force of the magnet 710. Therefore, leakage of magnetic flux can be prevented from occurring.

For example, the yoke and the magnet 710 form a magnetic circuit.

On the other hand, in order to compensate for image shake caused by hand shake of a user or the like, the lens module 200 may move in a first direction perpendicular to the optical axis and in a second direction perpendicular to the optical axis and the first direction.

For example, when shake occurs due to hand shake of a user during image capturing, the shake correction unit compensates for the shake by providing the lens module 200 with a relative displacement corresponding to the shake.

The guide portion 400 is accommodated in the carrier 300 to be disposed in an upper portion thereof in the optical axis direction. Then, the supporter 220 is disposed on the upper portion of the guide portion 400. Further, the ball member C serving as a rolling bearing may be disposed between the carrier 300 and the guide portion 400 in the optical axis direction and between the guide portion 400 and the bracket 220 in the optical axis direction.

The guide portion 400 is configured to guide the lens module 200 when the lens module 200 moves in the first and second directions perpendicular to the optical axis.

For example, the lens module 200 moves relative to the guide portion 400 in a first direction, and the guide portion 400 and the lens module 200 may be configured to move together in a second direction within the carrier 300.

The shake correction unit includes a plurality of magnets 810a and 830a and a plurality of coils 810b and 830b (e.g., a first Optical Image Stabilization (OIS) driving coil and a second OIS driving coil) that generate driving forces for image stabilization. Further, a plurality of position sensors 810c and 830c (e.g., hall sensors) may be provided to sense positions of the lens module 200 in the first and second directions.

Among the plurality of magnets 810a and 830a and the plurality of coils 810b and 830b, a portion 810a of the magnets and a portion 810b of the coils are disposed to face each other in a first direction to generate a driving force in the first direction, and the remaining magnets 830a and the remaining coils 830b are disposed to face each other in a second direction to generate a driving force in the second direction.

The plurality of magnets 810a and 830a are mounted on the lens module 200, and the plurality of coils 810b and 830b and the plurality of position sensors 810c and 830c facing the plurality of magnets 810a and 830a are fixed to the housing 110. For example, a plurality of coils 810b and 830b and a plurality of position sensors 810c and 830c are disposed on the substrate 900, and the substrate 900 is mounted on the housing 110.

The plurality of magnets 810a and 830a are moving members that move in the first and second directions together with the lens module 200, and the plurality of coils 810b and 830b and the plurality of position sensors 810c and 830c are fixed members fixed to the housing 110.

On the other hand, in the present disclosure, a ball member C supporting the guide portion 400 and the lens module 200 is provided. The ball member C serves to guide the guide portion 400 and the lens module 200 during image stabilization.

The ball member C may be disposed between the carrier 300 and the guide portion 400, between the carrier 300 and the lens module 200, and between the guide portion 400 and the lens module 200.

When the driving force in the first direction is generated, the ball members C disposed between the carrier 300 and the guide portion 400 and between the carrier 300 and the lens module 200 roll in the first direction. Accordingly, the ball member C guides the movement of the guide portion 400 and the lens module 200 in the first direction.

Further, when the driving force in the second direction is generated, the ball members C disposed between the guide portion 400 and the lens module 200 and between the carrier 300 and the lens module 200 roll in the second direction. Accordingly, the ball member C guides the movement of the lens module 200 in the second direction.

The lens module 200 and the carrier 300 are accommodated in the case 110. For example, the case 110 has an open upper portion and a lower portion, and the lens module 200 and the carrier 300 are accommodated in an inner space of the case 110.

A printed circuit board on which the image sensor is mounted may be disposed in a lower portion of the housing 110.

The case 120 is coupled with the housing 110 to surround an outer surface of the housing 110 and serves to protect internal components of the camera module. In addition, the housing 120 may function as a shield against electromagnetic waves.

The housing 120 may shield electromagnetic waves so that the electromagnetic waves generated by the camera module do not affect other electronic components in the portable electronic device.

Further, since the portable electronic device is equipped with various electronic components in addition to the camera module, the housing 120 can shield electromagnetic waves so that electromagnetic waves generated from these electronic components do not affect the camera module.

The housing 120 is formed of a metal material and may be grounded to a ground pad provided on the printed circuit board, thereby shielding electromagnetic waves.

The aperture module 500 is a device configured to selectively change an incident amount of light incident on the lens module 200.

For example, the aperture module 500 may include a plurality (e.g., three) of inlet holes or apertures having different sizes. Depending on the shooting environment, light may be incident through one of three entrance holes or apertures.

Fig. 4 is an exploded perspective view of an example of an aperture module according to one or more embodiments, and fig. 5A-5C are plan views showing an example of an aperture module driven to change a diameter of an inlet aperture or an aperture.

In the diaphragm module 500, according to this example, at least two inlet holes or apertures having different sizes may be formed by overlapping at least two blades and combining through holes provided therein. In this example, as a non-limiting example, a structure in which three inlet holes or apertures are formed using two blades will be described for reference, but the present disclosure is not limited thereto. For example, an aperture module may be implemented in which three or more blades are used to form three different sizes of inlet holes or apertures.

The aperture module 500 is combined with the lens module 200 and is configured to selectively change an incident amount of light incident on the lens module 200.

Since a relatively small amount of light may be incident on the lens module 200 in a high illuminance environment and a relatively large amount of light may be incident on the lens module 200 in a low illuminance environment, image quality may be consistently maintained under various illumination conditions.

The aperture module 500 is coupled to the lens module 200 and is configured to be movable in the direction of the optical axis, the first direction, and the second direction together with the lens module 200. For example, by allowing the lens module 200 and the aperture module 500 to move together during auto-focusing and image stabilization, the distance therebetween does not change.

Referring to fig. 4, the diaphragm module 500 includes a base 510, a first blade (hereinafter also referred to as a "lower blade") 530, a second blade (hereinafter also referred to as an "upper blade") 540, and a diaphragm driving unit (including a magnet unit 520, the magnet unit 520 including a driving magnet 521a and a coil 521 b). Further, the aperture module 500 may include a cover 550 covering the base 510, the first blade 530, and the second blade 540 and having a through hole 551 through which light is incident.

The first vane 530 is provided with a first through hole 531, and the second vane 540 is provided with a second through hole 541. Further, since the first blade 530 and the second blade 540 slide while being in contact with each other, an antistatic treatment may be applied thereto to prevent triboelectricity from being generated.

Further, the first vane 530 is provided with a first guide hole 533 and a third guide hole 535, and the second vane 540 is provided with a second guide hole 543 and a fourth guide hole 545.

The first and second guide holes 533 and 543 may have a circular shape, and the third and fourth guide holes 535 and 545 may be inclined in one direction to have a long shape in one direction. Further, the inclination directions of the third guide hole 535 and the fourth guide hole 545 may be different (e.g., opposite to each other) based on the moving direction of the magnet unit 520.

The first and second blades 530 and 540 convert the linear motion of the magnet unit 520 into a rotational motion, and rotate based on the first protrusions 513 as rotational axes, respectively.

The first and second through holes 531 and 541 may have a shape in which a plurality of through holes (531 a, 531b, and 531 c) (541 a, 541b, and 541 c) having different diameters are connected to each other. In this example, forming three inlet holes or apertures will be described as an example. The first and second through holes 531 and 541 may have a shape in which relatively large-diameter through holes 531a and 541a, relatively small-diameter through holes 531b and 541b, and relatively medium-diameter through holes 531c and 541c are connected to each other. For example, the first through hole 531 may have a shape in which three holes are connected as a whole. The through holes 531a, 531b, 531c, 541a, 541b, and 541c may have a circular shape or a polygonal shape.

Further, the shapes of the first and second through holes 531 and 541 may be oriented differently (e.g., opposite to each other). For example, the first and second vanes 530 and 540 rotate about the first protrusion 513 as a central axis in a state in which the first protrusion 513 is fitted into the first and second guide holes 533 and 543, and in consideration of this, the first and second through holes 531 and 541 may have substantially symmetrical shapes in the circumferential direction.

The first blade 530 and the second blade 540 are coupled to the base part 510 such that portions thereof overlap each other in the optical axis direction, and are configured to be movable by diaphragm driving units, respectively. For example, the first blade 530 and the second blade 540 may be configured to rotate in opposite directions.

Further, portions of the first and second through holes 531 and 541 may be configured to overlap each other in the optical axis direction. Portions of the first and second through holes 531 and 541 may overlap each other in the optical axis direction to form an entrance hole through which light passes.

The first and second through holes 531 and 541 may partially overlap to form a plurality of inlet holes or apertures having different diameters. For example, portions of the first and second through holes 531 and 541 overlap to form relatively large-diameter inlet holes or apertures (see 531a and 541a in fig. 5A), relatively small-diameter inlet holes or apertures (see 531B and 541B in fig. 5B), and relatively medium-diameter inlet holes or apertures (see 531C and 541C in fig. 5C). For example, the inlet holes or apertures may have a circular shape or a polygonal shape according to the shapes of the first and second through holes 531 and 541.

Thus, light may be incident through one of the plurality of entrance holes or apertures according to the photographing environment.

On the other hand, in this example, the case where the size of the inlet hole is largest may be adjusted by the gap spacer 546. The gap spacer 546 is disposed adjacent to the blades 530 and 540 of the diaphragm module 500, and may have a through hole 546a having a size smaller than the largest inlet holes formed in the blades 530 and 540 and larger than the medium diameter inlet holes formed in the blades 530 and 540. Further, the center of the through hole 546a may be aligned with the inlet holes formed by the blades 530 and 540 in the optical axis direction.

For ease of description, the description will be made with reference to one or more embodiments in which the gap spacer 546 is disposed on the upper surface of the upper blade 540 that is closer to the object side, but the disclosure is not limited thereto. The gap spacer 546 may be disposed on an upper surface of the upper blade 540 closer to the object side, on a lower surface of the lower blade 530 closer to the image side, or in the middle (between the lower blade 530 and the upper blade 540).

Thus, the maximum inlet aperture realized by the aperture module 500 may be the size of the through-hole 546a of the gap spacer 546. The use of the gap spacer 546 to achieve an inlet hole having a maximum size is to cope with a case in which the shape of the inlet hole formed by overlapping the blades 530 and 540 does not maintain a desired shape due to a tolerance or the like.

Referring to fig. 5A, when the magnet unit 520 is positioned approximately in the middle of the movement guide portion 512 by the diaphragm driving unit, the first and second blades 530 and 540 rotate about the first protrusion 513 as an axis, and portions of the first and second through holes 531 and 541 may overlap each other to form inlet holes or apertures 531a and 541a having relative maximum diameters. On the other hand, in the present example, a gap spacer 546 having a through hole 546a smaller than the size of the largest inlet holes or apertures 531a and 541a formed by the first and second vanes 530 and 540 may be provided. In this case, the maximum inlet aperture may be realized by the through hole 546a of the gap spacer 546.

Referring to fig. 5B, when the magnet unit 520 is positioned on one side of the movement guide portion 512 by the diaphragm driving unit, the first and second blades 530 and 540 rotate about the first protrusion 513 as an axis, and portions of the first and second through holes 531 and 541 may overlap each other to form inlet holes or apertures 531B and 541B having relatively minimum diameters.

In addition, referring to fig. 5C, when the magnet unit 520 is located on the other side opposite to the one side of the movement guide portion 512 by the diaphragm driving unit, the first and second blades 530 and 540 rotate and move about the first protrusion 513 as an axis, and portions of the first and second through holes 531 and 541 may overlap with each other to form inlet and aperture holes or apertures 531C and 541C having opposite middle diameters.

The diaphragm driving unit includes a magnet unit 520 provided on the base portion 510 to be movable in a direction perpendicular to the optical axis direction, and a coil 521b (e.g., a diaphragm driving coil) fixed to the housing 110 to face the magnet unit 520. The driving magnet 521a driving the diaphragm may be polarized with three poles, and the two driving coils 521b may be disposed to face the two poles of the driving magnet 521a simultaneously. For example, when the driving magnet 521a is sequentially magnetized to NSN poles, the NS pole on the left side may face the driving coil disposed on the left side, and the SN pole on the right side may face the driving coil disposed on the right side.

The coil 521b is disposed on the substrate 900, and the substrate 900 is fixed to the housing 110. The substrate 900 may be electrically connected to a printed circuit board attached to the bottom of the camera module 1000.

Further, in this example, when the magnet unit 520 linearly moves, a closed-loop control method in which the position of the magnet unit 520 is sensed and fed back may be used. Thus, the position sensor 521c may be provided for closed loop control. The position sensor 521c may be installed adjacent to the center or side of the coil 521b to face the driving magnet 521a. The position sensor 521c may be mounted on the substrate 900, and may be a hall sensor.

The magnet unit 520 is a moving member that moves together with the base portion 510 in the optical axis direction, the first direction, and the second direction, and the coil 521b is a fixed member fixed to the housing 110.

Since the coil 521b provides a driving force to the diaphragm module 500 and is disposed outside the diaphragm module 500 (e.g., in the housing 110 of the camera module 1000), the weight of the diaphragm module 500 may be reduced.

In detail, since the coil 521b providing the driving force to the diaphragm module 500 is provided as a fixed member, the coil 521b does not move during the auto-focusing or image stabilizing operation, and thus, an increase in weight of the lens module 200 due to the adoption of the diaphragm module 500 can be significantly reduced.

Further, since the coil 521b that supplies driving force to the diaphragm module 500 is provided in the housing 110 as a fixed member and is electrically connected to the printed circuit board, the coil 521b of the diaphragm driving unit is not affected even in the case where the lens module 200 and the diaphragm module 500 move during auto-focusing and image stabilization.

Therefore, deterioration of the autofocus function can be prevented.

The base part 510 is provided with a movement guide part 512 on which the magnet unit 520 is provided. The movement guide portion 512 may protrude from the base portion 510 in the optical axis direction. The movement guide portion 512 may be provided in a square frame shape so that the magnet unit 520 may be easily positioned.

The magnet unit 520 includes a driving magnet 521a disposed to face the coil 521b and a magnet holder 522 to which the driving magnet 521a is attached. The driving magnet 521a is disposed to face the coil 521b in a direction perpendicular to the optical axis direction.

As shown, the driving magnet 521a may be magnetized with three poles along the moving path of the magnet unit 520. For example, as shown in fig. 4, the driving magnet 521a may be sequentially magnetized into an N-pole, an S-pole, and an N-pole. Of course, although not shown, the driving magnet 521a may be magnetized to S-pole, N-pole, and S-pole. Further, although illustration is omitted, the magnet unit 520 may be provided with two separate magnets having N and S poles, respectively.

Further, the two coils 521b may be disposed to face the driving magnet 521a, for example, to face each other. As shown in fig. 5A, 5B, and 5C, two coils 521B may be disposed to face the N and S poles on one side of the driving magnet 521a and the S and N poles on the other side of the driving magnet 521a, respectively. In this case, of the three magnetic poles magnetized, the middle magnetic pole is disposed to face the two coils. Further, for example, when the magnet unit 520 is provided with two separate magnets, the coils may be respectively opposed to the two separate magnets.

The magnet unit 520 is disposed on the movement guiding portion 512 of the base 510. Further, the lever member 516 supporting the magnet unit 520 may be provided on the base part 510 such that the magnet unit 520 may easily slide. Further, an insertion groove 525 may be provided in the magnet unit 520 such that the lever member 516 is inserted therein.

The rod member 516 may have a round bar or plate shape that facilitates sliding, and the insertion groove 525 is provided in a cylindrical shape having a smaller diameter than that of the rod member 516 to allow line contact with the rod member 516 to reduce friction, or may be provided in a polygonal shape, although not shown.

Further, when only the lever member 516 is in contact with the magnet unit 520, since the fixing of the magnet unit 520 is unstable and may be inclined, the supporting portion may be additionally provided on a portion spaced apart from the lever member 516. For example, the guide vane 517 may be disposed on an end of the moving guide portion 512 substantially in parallel with the lever member 516.

The base portion 510 is provided with a first protrusion 513 penetrating both the first guide hole 533 of the first vane 530 and the second guide hole 543 of the second vane 540. The first and second blades 530 and 540 rotate about the first protrusion 513.

The magnet holder 522 is provided with a second protrusion 523 penetrating the first and second blades 530 and 540.

The second protrusion 523 may be configured to pass through the third guide hole 535 of the first vane 530 and the fourth guide hole 545 of the second vane 540.

On the other hand, the third guide hole 535 and the fourth guide hole 545 may be inclined and formed long with respect to the moving direction of the magnet unit 520. The inclined directions of the third guide hole 535 and the fourth guide hole 545 may be inclined in opposite directions based on the moving direction of the magnet unit 520.

Accordingly, when the magnet unit 520 moves along one axis, the second protrusion 523 may move within the third guide hole 535 and the fourth guide hole 545, and as the second protrusion 523 moves, the first and second blades 530 and 540 may move toward the magnet unit 520 or away from the magnet unit 520 (see fig. 5A to 5C).

The holding yoke 515 may be disposed in the movement guide portion 512 to face the driving magnet 521a. The holding yoke 515 may provide a holding force such that the driving magnet 521a is supported by the movement guiding portion 512. The holding yoke 515 may be disposed such that the entire area thereof faces the driving magnet 521a, and may be disposed to face both end portions of the driving magnet 521a.

The magnet unit 520 may slide while being held in close contact with the movement guide part 512 due to attractive force between the holding yoke 515 and the driving magnet 521 a.

Further, according to the present example, the magnet unit 520 may be moved in a direction perpendicular to the optical axis direction, and as the magnet unit 520 moves, the first and second blades 530 and 540 rotate to change the sizes of the inlet holes in three stages (large, medium, and small). Therefore, when the magnet unit 520 is moved from one end of the movement guide portion 512 to the other end of the movement guide portion 512 in a direction perpendicular to the direction of the optical axis, the size of the inlet hole or aperture is changed into three types: large, medium and small. In this state, a state in which the magnet unit 520 is fixed to any one of the three positions of the both end portions and the intermediate portion of the movement guide portion 512 can be maintained.

In this way, when the magnet unit 520 moves in the direction perpendicular to the optical axis direction along the movement guide portion 512, the holding yoke 515 can hold the magnet unit 520 fixed in any one of three positions by the attractive force with the driving magnet 521 a. For example, even if no power is applied to the coil 521b, in a state in which the position of the magnet unit 520 is fixed by the attractive force with the holding yoke 515, a state in which an inlet hole of any one of a large size, a medium size, and a small size is formed may be held.

For example, as shown in fig. 4, according to one or more embodiments, the aperture module 500 may include a yoke 515 on the base 510. In more detail, the yoke 515 may be disposed to face the driving magnet 521a in the movement guide portion 512 extending in the optical axis direction on the base portion 510.

In this case, when the magnet unit 520 moves along the movement guide portion 512 in a direction perpendicular to the optical axis direction, the yoke 515 may keep the magnet unit 520 fixed at any one of three positions by attraction with the driving magnet 521 a. For example, even if no power is applied to the coil 521b, in a state in which the position of the magnet unit 520 is fixed by the attractive force with the yoke 515, a state in which an inlet hole of any one of a large size, a medium size, and a small size is formed can be maintained.

As shown in fig. 6, in one or more embodiments, the yoke 515 may be provided with one expansion portion 515a having a width wider than other portions of the yoke 515 in the optical axis direction to be opposite to the rear surface of the driving magnet 521a, thereby fixing the magnet unit 520 to any one of three positions by attraction with the driving magnet 521 a. The expansion portion 515a may be disposed to face between the two driving coils 521 b.

Further, two first holding portions 515b and 515c may be provided to extend from the extension portion 515a to both sides and fixed to the base portion 510 (the movement guide portion 512) of the diaphragm module 500 to face both side surfaces of the driving magnet 521a, respectively. Further, two first holding portions 515b and 515c may be fixed to the movement guiding portion 512.

Alternatively, as shown in fig. 7, in one or more embodiments, the yoke 518 may be provided with one expansion portion 518a having a width wider than other portions of the yoke 518 in the optical axis direction to be opposite to the rear surface of the driving magnet 521a, thereby fixing the magnet unit 520 to any one of three positions by attraction with the driving magnet 521 a. The expansion portion 518a may be disposed to face between the two driving coils 521 b.

Further, two second holding portions 518b and 518c extending from the extension portion 518a to both sides and then extending in the optical axis direction may be provided. Further, two second holding portions 518b and 518c may be fixed to the movement guiding portion 512.

Further, according to another example, two third holding portions 518d and 518e extending perpendicularly to the rear surface of the driving magnet 521a from the two second holding portions 518b and 518c, respectively, may also be provided. Further, two second holding portions 518b and 518c or third holding portions 518d and 518e may be fixed to the movement guiding portion 512.

As set forth above, in the camera module according to one or more embodiments, even when the aperture module is installed, the weight increase of the driving unit may be significantly reduced, and thus the performance of the auto focus and image stabilization functions may be maintained.

Furthermore, an aperture module according to one or more embodiments may accurately achieve three diaphragm diameters.

While this disclosure includes particular examples, it will be apparent, after an understanding of the disclosure, that various changes in form and details may be made therein without departing from the spirit and scope of the claims and their equivalents. The examples described herein should be considered in descriptive sense only and not for purposes of limitation. The description of features or aspects in each example should be considered to be applicable to similar features or aspects in other examples. Suitable results may also be obtained if the described techniques are performed in a different order and/or if components in the described systems, architectures, devices or circuits are combined in a different manner and/or are replaced or supplemented by other components or their equivalents.

Accordingly, the scope of the present disclosure includes the claims and their equivalents, i.e., all changes within the scope of the claims and their equivalents are to be construed as being included in the present disclosure, in addition to the above and all accompanying disclosure.

Claims (18)

1. An aperture module, the aperture module comprising:

A base portion;

a plurality of blades disposed on the base portion; and

An aperture driving unit including a magnet unit configured to linearly reciprocate on the base portion and drive the plurality of blades,

Wherein the magnet unit comprises a drive magnet having an odd number of polarized poles along a movement path of the magnet unit.

2. The aperture module of claim 1 wherein the odd number of polarizing poles is three.

3. The aperture module of claim 1, wherein the plurality of blades are configured to form three different aperture sizes when combined.

4. The diaphragm module of claim 1, further comprising a yoke disposed on the base portion and configured to face the driving magnet along the moving path of the magnet unit.

5. The aperture module according to claim 4, wherein the magnet unit is fixable to any one of three different positions on the movement path by an attractive force between the driving magnet and the yoke.

6. The aperture module as recited in claim 5, wherein the yoke has an expanded portion opposed to the driving magnet, the expanded portion having a height in the optical axis direction larger than that of the other portions of the yoke.

7. The diaphragm module of claim 6, wherein the expansion portion is provided in a middle portion of the moving path of the magnet unit.

8. The diaphragm module according to claim 6, wherein the yokes have holding portions facing sides of the driving magnet on both ends, respectively, and/or have a greater height in the optical axis direction than other portions of the yokes.

9. A camera module comprising a housing having a lens module, and the aperture module of claim 1 coupled to the lens module.

10. A camera module, the camera module comprising:

a housing having a lens module; and

A diaphragm module coupled to an upper portion of the lens module, the diaphragm module including a base portion, a plurality of blades provided on the base portion, and a diaphragm driving unit including a magnet unit configured to linearly reciprocate on the base portion and drive the plurality of blades,

Wherein the magnet unit includes:

A driving magnet having an odd number of polarized poles along a moving path of the magnet unit; and

A driving coil disposed along the moving path of the magnet unit to face the driving magnet.

11. The camera module of claim 10, wherein the odd number of polarized poles is three.

12. The camera module of claim 10, wherein the driving coil is two driving coils disposed simultaneously and opposite to two poles of the driving magnet, respectively.

13. The camera module according to claim 11, further comprising a yoke provided on the base portion and facing the driving magnet along the moving path of the magnet unit.

14. The camera module of claim 13, wherein the magnet unit is fixable to any one of three different positions on the movement path by an attractive force between the driving magnet and the yoke.

15. The camera module according to claim 13, wherein the yoke has an extended portion in which a height of a portion opposite to the driving magnet in the optical axis direction is larger than that of the other portions.

16. The camera module of claim 15, wherein the drive coil is two drive coils, and the extension portion is disposed between the two drive coils.

17. The camera module of claim 10, wherein a position sensor configured to sense a position of the magnet unit is provided in the housing.

18. A camera module, the camera module comprising:

A housing;

A lens module accommodated in the housing; and

An aperture module configured to form three apertures of different sizes using a plurality of blades,

Wherein on a surface of the housing parallel to an optical axis direction, a first optical image stabilization driving coil is provided to drive the lens module in a first direction perpendicular to the optical axis direction, a second optical image stabilization driving coil is provided to drive the lens module in a second direction perpendicular to the optical axis direction and the first direction, an autofocus driving coil is provided to drive the lens module in the optical axis direction, and two diaphragm driving coils are provided to drive the plurality of blades, respectively.