Aperture module, camera device including same, and optical instrument

Abstract

An embodiment comprises: a base; a rotor disposed on the base and including a coupling part; a ball member positioned between the base and the rotor; a shape memory alloy member for rotating the rotor, the shape memory alloy including one end and the other end, which are coupled to the base, and a region connected to the coupling part of the rotor; and a blade part connected to the rotor and including an opening that changes in size according to the rotation of the rotor, wherein the coupling part of the rotor is positioned closer to the one end of the shape memory alloy member than the other end of the shape memory alloy member.

Description

Aperture module and camera device and optical device including the same

[0001] An embodiment relates to an aperture module, and a lens module and camera device including the same.

[0002] A camera device is a device that captures a subject as a photograph or video, and it is mounted on portable devices, drones, vehicles, and the like. To improve image quality, camera devices may be equipped with Image Stabilization (IS) functions, such as Optical Image Stabilizer (OIS), and Auto Focusing (AF) functions to correct or prevent image shake caused by user movement. Camera devices require a configuration capable of adjusting the amount of incident light to suit the surrounding or shooting environment.

[0003] An embodiment provides an aperture module capable of increasing the stroke range and reducing the length in the direction of the optical axis, and a camera device and an optical device including the same.

[0004] An aperture module according to an embodiment comprises: a base; a rotor disposed on the base and including a coupling portion; a ball member disposed between the base and the rotor; a shape memory alloy member that rotates the rotor, including a region connected to the coupling portion of the rotor and a region connected to the coupling portion of the rotor and a one end and a other end coupled to the base; and a blade portion connected to the rotor and including an opening whose size varies by the rotation of the rotor, wherein the coupling portion of the rotor is disposed closer to the one end of the shape memory alloy member than to the other end of the shape memory alloy member.

[0005] The one end and the other end of the shape memory alloy member are coupled to the upper surface of the base, and the coupling portion may be a projection protruding from the lower surface of the rotor.

[0006] The first length between the end of the shape memory alloy member and the region of the shape memory alloy member may be smaller than the second length between the other end of the shape memory alloy member and the region of the shape memory alloy member. The second length may be greater than or equal to 1.3 times the first length and less than or equal to 1.7 times the first length. The region of the shape memory alloy member may be located inside the end and the other end of the shape memory alloy member.

[0007] The coupling portion of the rotor may include a first coupling portion and a second coupling portion spaced apart from each other, and the shape memory alloy member may include a first shape memory alloy member comprising a first end portion and a second end portion coupled to the base, and a first region connected to the first coupling portion of the rotor; and a second shape memory alloy member comprising a third end portion and a fourth end portion coupled to the base, and a second region connected to the second coupling portion of the rotor.

[0008] The first length between the first end and the first region of the first shape memory alloy member may be smaller than the second length between the second end and the first region of the first shape memory alloy member. The third length between the third end and the second region of the second shape memory alloy member may be smaller than the fourth length between the fourth end and the second region of the second shape memory alloy member.

[0009] The first end and the third end are located on the same side with respect to the first straight line connecting the first joint and the second joint, and the second end and the fourth end may be located on opposite sides of the first end and the third end with respect to the first straight line.

[0010] The first end and the fourth end are located on the same side with respect to the first straight line connecting the first joint and the second joint, and the second end and the third end may be located on opposite sides of the first end and the fourth end with respect to the first straight line.

[0011] The second length may be greater than or equal to 1.3 times the first length and less than or equal to 1.7 times, and the fourth length may be greater than or equal to 1.3 times the third length and less than or equal to 1.7 times.

[0012] The aperture module may include a magnet disposed on the rotor; and a magnetic body disposed on the base and having an attractive force with the magnet.

[0013] The above magnet includes a first magnet unit and a second magnet unit located opposite each other with respect to the optical axis, and the magnetic body includes a first magnetic body facing the first magnet unit and a second magnetic body facing the second magnet unit, and when viewed from above, a straight line connecting the center of the first magnet unit and the center of the second magnet unit may not overlap with the first and second shape memory alloy members.

[0014] The ball member may be disposed in one region of the base located between the first end of the first shape memory alloy member and the third end of the second shape memory alloy member, and in another region of the base located between the second end of the first shape memory alloy member and the fourth end of the second shape memory alloy member.

[0015] In the embodiment, since both ends of the shape memory alloy member are fixed to the base and a portion of the shape memory alloy member is connected to the coupling part of the rotor, the stroke range of the rotor can be increased.

[0016] In the embodiment, since the blade portion is driven using a shape memory alloy member, a stroke for the aperture module can be implemented without a separate mechanism, and the number of parts of the aperture module can be reduced.

[0017] In the embodiment, the rotor and base are arranged vertically, and since a rolling member is placed between the rotor and the base, the assembly between the rotor and the base can be simple and simplified.

[0018] In addition, in the embodiment, since the shape memory alloy member is located between the rotor and the base, the size (or length) of the aperture module in the optical axis direction can be reduced.

[0019] Figure 1 is an exploded view of an aperture module according to an embodiment.

[0020] FIG. 2 is a lower perspective view of the cover member.

[0021] FIG. 3 is a perspective view of the blade section, support plate, rotor, and magnet.

[0022] FIG. 4 is a lower perspective view of the rotor and magnet.

[0023] FIG. 5 is an exploded perspective view of a base, a position sensor, a circuit board, and a magnetic material.

[0024] FIG. 6a is a combined diagram of a base, a circuit board, a cloud member, a shape memory alloy member, and a magnetic material.

[0025] Figure 6b shows the connection between the shape memory alloy member and the joint of the rotor.

[0026] Figure 7 shows a support plate placed on the rotor.

[0027] FIG. 8 is a perspective view of an aperture module with the cover member removed.

[0028] Figure 9 is a cross-sectional view of the aperture module in the AB direction of Figure 8.

[0029] FIG. 10 is a cross-sectional view of the aperture module in the CD direction of FIG. 8.

[0030] FIG. 11 is a cross-sectional view of the aperture module in the EF direction of FIG. 8.

[0031] FIG. 12 is intended to explain the operation of a shape memory alloy member that rotates a rotor.

[0032] FIG. 13 shows the first and second coupling portions of a rotor according to another embodiment.

[0033] FIG. 14 is a perspective view of a camera device according to an embodiment.

[0034] FIG. 15a shows a perspective view of an optical device according to an embodiment.

[0035] FIG. 15b shows a perspective view of an optical device according to another embodiment.

[0036] Figure 16 shows a configuration diagram of the optical device illustrated in Figures 15a and 15b.

[0037] The following describes an embodiment of the present invention that can specifically realize the above objectives, with reference to the attached drawings.

[0038] In the description of the embodiments, where it is stated that an element is formed "on or under," the term "on or under" includes both cases where two elements are in direct contact with each other and cases where one or more other elements are positioned indirectly between the two elements. Furthermore, when expressed as "on or under," it may include the meaning of a downward direction as well as an upward direction relative to a single element.

[0039] Additionally, relational terms used below, such as "first" and "second," "upper / upper / above," and "lower / lower / below," do not necessarily require or imply any physical or logical relationship or order between such entities or elements, and may be used solely to distinguish one entity or element from another. Furthermore, the same reference number indicates the same element through the description of the drawings.

[0040] Furthermore, terms such as "include," "constitute," or "have" as described above, unless specifically stated otherwise, imply that the relevant component may be inherent; therefore, they should be interpreted as allowing for the inclusion of additional components rather than excluding them. Additionally, terms such as "corresponding" as described above may include at least one of the meanings of "opposing" or "overlapping."

[0041] Hereinafter, an aperture module according to an embodiment, and a camera device and an optical device including the same, will be described as follows with reference to the attached drawings. For convenience of explanation, the camera device according to the embodiment is described using a Cartesian coordinate system (x, y, z), but may be described using other coordinate systems, and the embodiment is not limited thereto. In each drawing, the X-axis and the Y-axis may be axes in a direction perpendicular to the Z-axis, which is the optical axis direction (OA).

[0042] In addition, the Z-axis direction, which is the optical axis direction, can be defined as 'any one of the first to third directions', the X-axis direction can be defined as 'another one of the first to third directions', and the Y-axis direction can be defined as 'the remaining one of the first to third directions'. For example, the first direction may be a direction perpendicular to the imaging area of ​​the image sensor.

[0043] Additionally, the X-axis (or Y-axis) may be referred to as the "first horizontal axis," and the direction of the X-axis (or Y-axis) may be defined as the "first horizontal direction." The Y-axis (or X-axis) may be defined as the "second horizontal axis," and the direction of the Y-axis (or X-axis) may be defined as the "second horizontal direction." For example, the optical axis direction may be the direction of the optical axis or a direction parallel to the optical axis. Also, for example, the optical axis may be the optical axis of a lens mounted on a lens barrel. Or, for example, the optical axis may be an axis perpendicular to the imaging area of ​​the image sensor and passing through the center of the imaging area. Additionally, the expression "terminal" below may be replaced with a pad, an electrode, or a conductive layer.

[0044] In addition, in the embodiment, regarding the connection between the protrusion and the hole for connecting two components to each other, one component may be a connecting protrusion (or connecting hole), and the other component may be a corresponding connecting hole (or connecting protrusion).

[0045] A camera device according to an embodiment may perform an image stabilization function and / or an auto-focusing function. The "image stabilization function" may be a function that moves the lens in a direction perpendicular to the optical axis or tilts the lens relative to the optical axis to cancel out vibrations (or movements) caused by the user's hand shake. Additionally, the "auto-focusing function" may be a function that automatically focuses on a subject by moving the lens in the direction of the optical axis according to the distance to the subject in order to obtain a clear image of the subject on the image sensor. Hereinafter, "camera device" may be replaced with "camera," "actuator," "camera module," "imaging device," or "photographer."

[0046] FIG. 1 is an exploded view of an aperture module (100) according to an embodiment. FIG. 2 is a lower perspective view of a cover member (300), FIG. 3 is a perspective view of a blade portion (150), a support plate (160), a rotor (110), and a magnet (130), FIG. 4 is a lower perspective view of the rotor (110) and the magnet (130), FIG. 5 is an exploded perspective view of a base (140), a position sensor (170), a circuit board (190), and a magnetic body (70), FIG. 6a is a combined view of the base (140), the circuit board (190), the rolling member (40), the shape memory alloy member (120), and the magnetic body (70), FIG. 6b shows the connection of the shape memory alloy member (120) and the connecting portion (38) of the rotor (110), FIG. 7 shows a support plate (160) placed on the rotor (110), and FIG. 8 shows an aperture with the cover member (300) removed. FIG. 9 is a cross-sectional view of the aperture module (100) in the AB direction of FIG. 8, FIG. 10 is a cross-sectional view of the aperture module (100) in the CD direction of FIG. 8, FIG. 11 is a cross-sectional view of the aperture module (100) in the EF direction of FIG. 8, and FIG. 12 is for explaining the operation of a shape memory alloy member (120) that rotates the rotor (110).

[0047] Referring to FIGS. 1 to 12, the aperture module (100) can adjust or change the amount of light incident on the camera device (200) or the amount of light incident. For example, the aperture module (100) may be placed on the lens module (400) of the camera device (200).

[0048] The aperture module (100) may include a base (140), a blade portion (150), a rotor (110), and a shape memory alloy member (120).

[0049] The aperture module (100) may include a fixed base (140), a movable rotor (110), a blade part (150) for controlling the amount of incident light, and a shape memory alloy member (120) for moving the rotor (110).

[0050] The shape memory alloy member (120) can connect the base (140) and the rotor (110) and move the blade portion (150). The aperture module (100) may have an incident hole (or opening) whose size changes in multiple stages or continuously depending on the position or displacement of the blade portion (150). Light can be incident through the incident hole (or opening).

[0051] The aperture module (100) may further include a position sensor (170) for detecting the displacement or position of the blade portion (150). The aperture module (100) may further include a rolling member (40) positioned between the base (140) and the rotor (110).

[0052] The rotor (110) may be placed on the base (140). For example, the rotor (100) may be spaced apart from the base (140). A rolling member (40) may support the rotor (110) with respect to the base (140). For example, the rolling member (40) may be placed between the lower part of the body (110A) of the rotor (110) and the upper part of the base (140).

[0053] At least a portion (or a first portion) of the blade portion (150) may be connected to or coupled to the base (140). At least another portion (or a second portion) of the blade portion (150) may be connected to or coupled to the rotor (110). The blade portion (150) may move or rotate as the rotor (110) moves or rotates.

[0054] The aperture module (100) may include a cover member (300) for accommodating a rotor (110). The cover member (300) may be placed on the rotor (110) and may be coupled to a base (140). Referring to FIG. 2, the cover member (300) may be in the form of a box with an open bottom. The cover member (300) may include a top plate (301) and a side plate (302). The side plate (302) may be connected to the top plate (301). The cover member (300) may include an opening (303) formed in the top plate (301). The opening (302) may be a hole or a hollow that penetrates the top plate (301) in a first direction (OA).

[0055] The cover member (300) may include a groove (305) formed on the lower surface of the top plate (301). The groove (305) may be a relief groove to avoid spatial interference with at least one of the drive shaft (51) of the rotor (110) and the fixed shaft (71) of the base (140), which will be described later. For example, the groove (305) may be in a recessed shape from the lower surface of the top plate (301). The groove (305) of the cover member (300) may include a groove (305A) that corresponds to, opposes, or overlaps with the fixed shaft (71) of the base (140) in a first direction. Additionally, the groove (305) of the cover member (300) may include a groove (305B) that corresponds to, opposes, or overlaps with the drive shaft (51) of the rotor (110) in a first direction.

[0056] At least a portion (e.g., the top) of the drive shaft (51) may be placed within the groove (305B). For example, at least a portion (e.g., the top) of the drive shaft (51) may overlap with the groove (305B) in a direction perpendicular to the first direction. For example, at least a portion (e.g., the top) of the drive shaft (51) may be spaced apart from the groove (305B). For example, the upper surface of the drive shaft (51) may be spaced apart from the bottom surface of the groove (305B). This is because the drive shaft (51) must move. The groove (305A) may include a plurality of grooves (58A to 58F) corresponding to a plurality of fixed axes (71A to 71F) of the base (140). The groove (305B) may include a plurality of grooves (59A to 59F) corresponding to a plurality of drive axes (51A to 51F) of the rotor (110).

[0057] The blade portion (150) may be disposed within the cover member (300). The blade portion (150) may include an opening (201) that corresponds to, opposes, or overlaps with an opening (303) of the cover member (300). The blade portion (150) may adjust the size of the opening (201) into which light is incident. The opening (201) of the blade portion (150) may correspond to, oppose, or overlap with an opening (205) of the support plate (160) in a first direction (OA).

[0058] The blade portion (150) may include a plurality of blades (150A to 150F). In FIG. 3, the number of blades may be 6, but in other embodiments, the number of blades may be 2 to 5, or 7 or more. For example, each of the plurality of blades (150A to 150F) may form an opening (301) by being arranged so that at least a portion of them overlap in a first direction. The blade portion (150) may include a plurality of layers, and each layer may include a plurality of blades. For example, each layer of the blade portion (150) may include a plurality of blades.

[0059] The blade portion (150) may include a first portion coupled to the base (140) and a second portion coupled to the rotor (110). For example, the blade portion (150) may be rotatable around the first portion of the blade portion (150) as an axis, and the second portion of the blade portion (150) may move or rotate in conjunction with the rotor (110). The blade portion (150) may include a hole (41) for coupling with the fixed shaft (71) of the base (140). The blade portion (150) may include a hole (3) for coupling with the drive shaft (51) of the rotor (110). With the hole (41) of the blade portion (150) fitted into the fixed shaft (71) of the base (140), the blade portion (150) may only be rotatable around the fixed shaft (71). With the drive shaft (51) inserted into the hole (3) of the blade portion (150), the hole (3) of the blade portion (150) may be extended in one direction so that the drive shaft (51) can move. For example, the hole (3) may be extended in a direction that intersects the rotational direction of the blade portion (150) centered on the fixed shaft (71). The hole (3) of the blade portion (150) may be formed to correspond to the path along which the drive shaft (51) of the rotor (110) moves.

[0060] For example, each of the plurality of blades (150A to 150F) may include a hole (41A to 41F) for coupling with a fixed shaft (71A to 71F) and a hole (3A to 3F) for coupling with a driving shaft (51A to 51F). The hole (3) of the blade portion (150) may be expressed as a "driving shaft hole," "coupling hole," "guide hole," "moving shaft hole," or a first hole (or a second hole). The hole (41) of the blade portion (150) may be expressed as a "rotating shaft hole," "coupling hole," "fixed shaft hole," or a second hole (or a first hole).

[0061] In the aperture module (100), the "moving part (or rotating part)" may be an element or component that moves or rotates relative to the fixed part. In the aperture module (100), the "fixed part" may be an element or component that does not move or rotate together with the moving part of the aperture module (100). In the aperture module (100), the "fixed part" may be a fixed element or component that moves the moving part or drives the blade part (150). The fixed part may be expressed as a "fixed body."

[0062] In the aperture module (100), the "moving part (or rotating part)" may include a rotor (110) and a blade part (150). Additionally, in the aperture module (100), the "moving part (or rotating part)" may include a component (e.g., a magnet (130)) coupled to the rotor (110). In the aperture module (100), the "moving part (or rotating part)" may include a drive shaft (51). Also, for example, in the aperture module (100), the "moving part (or rotating part)" may include a support plate (160).

[0063] In the aperture module (100), the fixed portion may include at least one of a base (140) and a cover member (300). In the aperture module (100), the fixed portion may include a configuration coupled to the base (140) or the cover member (300). In the aperture module (100), the fixed portion may include a circuit board (190). For example, in the aperture module (100), the fixed portion may further include a configuration coupled to the circuit board (190) (e.g., a position sensor (170), a magnetic body (70)).

[0064] The rotor (110) may be placed within the cover member (300). The rotor (110) may be placed below the blade portion (150). The rotor (110) may be rotatable by a preset angle. The rotor (110) may be connected to the blade portion (150), and the opening (201) of the blade portion (150) may be varied by the rotation of the rotor (110).

[0065] The rotor (110) may include an opening (401) that corresponds to or opposes the opening (201) of the blade portion (150), the opening (303) of the cover member (300), or the opening (205) of the support plate (160) in the first direction. The opening (401) may be a through hole or a hollow that penetrates the rotor (110) in the first direction. The rotor (110) may be expressed as a "rotating body," "driving body," "driving plate," "rotating plate," "rotating frame," "moving plate," "moving body," "rotating ring," "driving ring," or "driving frame." The rotor (110) may include a circular ring shape or a disc shape to facilitate rotation. For example, the rotor (110) may include a body (110A) having a circular ring shape or a disc shape.

[0066] The rotor (110) may include a support member (47) for supporting at least a portion of the rolling member (40). The support member (47) may protrude downward from the body (110A) of the rotor (110). The support member (47) may protrude downward from the body (110A) of the rotor (110) toward the base (140). The support member (47) may protrude downward from the lower surface of the body (110A). The support member (47) may be referred to as a "protrusion" or an "extension."

[0067] With respect to the optical axis (OA), the support member (47) may be located inside the outer surface or outer circumference of the rotor (110). The support member (47) may be located closer to the inner circumference (or inner side) of the rotor (110) than to the outer surface (or outer circumference) of the rotor (110). This is to ensure that the support member (47) is adjacent to or in contact with the rolling member (40).

[0068] The rotor (110) may include a plurality of support members (47A, 47B) corresponding to a plurality of ball members (B1 to B4). For example, the rotor (110) may include two support members (47A, 47B) located on opposite sides of the body (110A) with respect to the opening (401). The two support members (47A, 47B) may be located on opposite sides of each other in a second direction perpendicular to the first direction. In FIG. 4, the number of support members (47) is two, but in other embodiments, there may be three or more support members (47). At least a portion of the support members (47) may face or overlap with at least a portion of the rolling member (40) in a direction perpendicular to the first direction. At least a portion of the rolling member (40) may come into contact with the support members (47) of the rotor (110).

[0069] The rotor (110) may include a receiving portion (24) for receiving a magnet (130). The receiving portion (24) of the rotor (110) may be a "groove" or a "receiving groove." For example, the receiving portion (24) may be placed or formed in the support portion (47) of the rotor (110). In other embodiments, the receiving portion (24) may be omitted.

[0070] The magnet (130) can be placed on the rotor (110). The magnet (130) can be combined with the rotor (110). The magnet (130) can be placed within the receiving portion (24). For example, the magnet (130) can be combined with the receiving portion (24) by an adhesive.

[0071] The magnet (130) may include a plurality of magnet units spaced apart from each other. For example, the magnet (130) may include a first magnet unit (130A) and a second magnet unit (130B) spaced apart from each other. The first magnet unit (130A) and the second magnet unit (130B) may be located on opposite sides of the optical axis. In other embodiments, the number of magnet units may be one or three or more.

[0072] The rotor (110) may include a drive shaft (51) for rotating or moving the blade portion (150). The drive shaft (51) may be connected to or coupled with the blade portion (150). The drive shaft (51) may be described as a "moving shaft," "pillar portion," "protrusion," "moving boss," or "connecting shaft." For example, the drive shaft (51) may have a cylindrical shape or a rod shape.

[0073] The rotor (110) may include a plurality of drive shafts (51A to 51F) corresponding to a plurality of blades (150A to 150F). For example, the number of drive shafts (51) may be equal to the number of blades. The plurality of drive shafts (51A to 51F) may be spaced apart from each other. The drive shaft (51) may protrude or extend from the body (110A) of the rotor (110). For example, the drive shaft (51) may protrude or extend from the body (110A) in a direction toward the blade portion (150). The drive shaft (51) may be formed integrally with the body (110A). In another embodiment, the drive shaft (51) may be a structure coupled to the body (110A).

[0074] One end of the drive shaft (51) may be inserted into or fitted into the hole (3) (or drive shaft hole) of the blade portion (150A to 150F). One end of each of the plurality of drive shafts (51A to 51F) may be inserted into or fitted into any one of the corresponding holes (3A to 3F) of the blades (150A to 150F).

[0075] A support plate (160) may be placed between the blade portion (150) and the rotor (110). For example, the support plate (160) may be placed on the upper surface of the body (110A) of the rotor (110). The support plate (160) may serve to support at least a portion of the blade portion (150). The support plate (160) may support at least one of the blades (150A to 150F). The support plate (160) may be referred to as a "base sheet," "support sheet," or "spacer."

[0076] The support plate (160) may have a circular opening (205). The opening (205) may be a through hole. The support plate (160) may serve to make the shape of the opening of the aperture module (100) that receives light incident from the outside circular. The support plate (160) may include a relief portion (161A to 161F) to avoid spatial interference with the drive shaft (51) of the rotor (110).

[0077] It may include a plurality of relief portions (161A to 161F) corresponding to a plurality of drive shafts (51A to 51F). The relief portions (161A to 161F) may be holes penetrating the support plate (160) or grooves recessed from the outer surface of the support plate (160).

[0078] The base (140) may be located below the rotor (110). The base (140) may be located below the body (110A) of the rotor (110). The base (140) may accommodate at least a portion of the rotor (110). For example, the rotor (110) and the base (140) may be formed by an injection method using an injection mold. For example, the rotor (110) and the base (140) may be formed from an injection-molded material, such as plastic or resin.

[0079] The base (140) may include an internal space capable of accommodating at least a portion of the support portion (47) of the rotor (110). Additionally, the base (140) may accommodate at least a portion of the lens module (400) internally. For example, the lower or bottom portion of the lens module (400) may be placed within the base (140).

[0080] The base (140) may include an opening (501). The opening (501) may be a through hole or a hollow that penetrates the base (140) in a first direction. For example, the base (140) may be cylindrical in shape. The upper surface of the base (140) may face or overlap with the lower surface of the rotor (110) in a first direction.

[0081] The base (140) may include a fixed shaft (71) that is connected to or coupled with the blade portion (150). The fixed shaft (71) may be positioned on one side of the base (140) facing the blade portion (150) (e.g., the upper surface or top of the base (140)). The fixed shaft (71) may protrude from the upper surface of the base (140). The fixed shaft (71) may be referred to as a "rotation shaft," "column portion," "protrusion," "fixed boss," or "coupling shaft." For example, the fixed shaft (71) may have a cylindrical shape or a rod shape.

[0082] The fixed shaft (71) may be inserted into or fitted into the hole (41) of the blade portion (150). The fixed shaft (71) may be coupled with the hole (41) of the blade portion (150). For example, to facilitate rotation, a lubricant or grease may be placed within the fixed shaft (71) and the hole (41) of the blade portion (150).

[0083] The fixed shaft (71) may include a plurality of fixed shafts (71A to 71D) corresponding to a plurality of blades (150A to 150F). Each of the plurality of fixed shafts (71A to 71F) may include a plurality of fixed shafts (71A to 71F) that are coupled to or connected to any one of the corresponding holes (41A to 41F) of the plurality of blades (150A to 150F). For example, the number of fixed shafts (71) may be the same as the number of blades.

[0084] The rotor (110) may include a relief portion (61) to avoid spatial interference with the fixed axis (71). The relief portion (61) may be in the form of a through hole penetrating the body (110A) in a first direction. In another embodiment, the relief portion may be in the form of a groove formed in the body (110A) or a relief groove in which a part of the body (110A) is recessed. Or in another embodiment, the relief portion may be in the form of a chamfered part of the body (110A). In the first direction, the relief portion (61) may overlap with the fixed axis (71). The relief portion (61) may include a plurality of relief portions (61A to 61F) spaced apart from each other in a clockwise direction (or counterclockwise direction), in the circumferential direction of the rotor (110), or in the direction in which the rotor (110) rotates.

[0085] The lower surface of the rotor (110) and the upper surface of the base (140) can be spaced apart by the rolling member (40). Additionally, when the rotor (110) rotates, the lower surface (or lower part) of the rotor (110) and the upper surface (or upper part) of the base (140) may have a separation structure to avoid spatial interference with each other.

[0086] The base (140) may include a receiving portion (33) for receiving at least a portion of the cloud member (40). The receiving portion (33) may be in the form of a recessed groove from the upper surface of the base (140). The receiving portion (33) may be referred to as a "groove," "receiving groove," or "guide groove." The receiving portion (33) may include a bottom surface (22A) and a side (22B) (or "side wall"). The receiving portion (33) may include an opening (23) that is open toward the support portion (47) of the rotor (110).

[0087] At least a portion of the ball members (B1 to B4) disposed within the receiving portion (33) of the base (140) may protrude from the upper surface of the base (140). At least a portion of the ball members (B1 to B4) may protrude outside the receiving portion (33) of the base (140). As a result, the rotor (110) disposed on the ball members (B1 to B4) may be disposed spaced apart from the base (140), and the rotor (110) may be easily movable or rotatable.

[0088] The receiving portion (33) may include a plurality of receiving portions (33A to 33D) corresponding to a plurality of ball members (B1 to B4). For example, when viewed from above, the receiving portion (33) or the rolling member (40) may be located between two adjacent fixed axes of the base (140).

[0089] The rolling member (40) may come into contact with at least one of the bottom surface (22A) and side surface (22B) of the receiving portion (33), the lower surface of the rotor (110), and the support portion (47). For example, the rolling member (40) may come into contact with at least one of the bottom surface (22A) of the receiving portion (33) of the base (140), the side surface (22B) of the receiving portion (33), the lower surface of the rotor (110), and the outer surface (73) of the support portion (47) of the rotor (110). The outer surface of the support portion (47) may face the receiving portion (33) and may connect the lower surface of the support portion (47) with the lower surface of the rotor (110). The outer surface (73) of the support portion (47) may be an inclined surface. For example, the outer surface (73) of the support portion (47) may be a curved surface bent in the circumferential direction of the rotor (110). For example, the outer surface (73) of the support member (47) may be a convex curved surface in the direction from the inner surface of the support member (47) toward the outer surface (73) of the support member (47). As a result, the contact area of ​​the rotor (110) with the rolling member (40) may be increased, and the rotor (110) may be stably supported by the rolling member (40).

[0090] The support portion (47) may overlap with the receiving portion (33) in a direction perpendicular to the optical axis direction or in a direction perpendicular to the first direction. The outer surface (73) of the support portion (47) may overlap with the side surface (22B) of the receiving portion (33) in a direction perpendicular to the optical axis direction or in a direction perpendicular to the first direction. The support portion (47) of the rotor (110) may be located inside the receiving portion (33) of the base (140). For example, the optical axis or center (101) may be located closer to the support portion (47) of the rotor (110) than to the receiving portion (33) of the base (140). The outer surface of the base (140) may be located closer to the receiving portion (33) of the base (140) than to the support portion (47) of the rotor (110).

[0091] The shape memory alloy member (120) acts as a driving unit that drives the blade portion (150) or rotates or moves the rotor (110). That is, the rotor (110) and the blade portion (150) can be moved, rotated, or tilted by a preset angle due to the expansion or contraction of the shape memory alloy member (120). The rotor (110) can be rotated or tilted around an optical axis.

[0092] The shape memory alloy member (120) may include a shape memory alloy (SMA). A shape memory alloy is an alloy that returns to its original shape, which is stored at a specific temperature, even if it is deformed into a different shape. For example, the shape memory alloy member (120) may be a conductive member formed from a conductive material. For example, the shape memory alloy member (120) may be a conductive metal or a conductive alloy. The shape memory alloy member (120) may be a wire, but in other embodiments, the shape memory alloy member (120) may be in the form of a plate.

[0093] The shape memory alloy member (120) may include a region connected to one end and the other end and the connecting portion (38) of the rotor (110) that is connected to the base (140), and may rotate the rotor (110) within a preset angle range. The connecting portion (38) of the rotor (110) may be positioned closer to one end of the shape memory alloy member (120) than to the other end of the shape memory alloy member (120).

[0094] One end and the other end of the shape memory alloy member (120) can be coupled to the upper surface of the base (140), and the coupling portion (38) of the rotor (110) can protrude from the lower surface of the rotor (110). For example, the coupling portion (38) may be a projection protruding from the lower surface of the rotor (110).

[0095] The first length between one end of the shape memory alloy member (120) and the said region of the shape memory alloy member (120) may be smaller than the second length between the other end of the shape memory alloy member (120) and the said region of the shape memory alloy member (120). The said region of the shape memory alloy member (120) may be located inside the one end and the other end of the shape memory alloy member (120).

[0096] One end of the shape memory alloy member (120) is coupled to one region of the base (140), and the other end of the shape memory alloy member (120) is coupled to one region of the base (140), and a portion of the shape memory alloy member (120) located between the one end and the other end of the shape memory alloy member (120) can be connected to the rotor (110). The one end and the other end of the shape memory alloy member (120) can be coupled to the base (140) by a coupling member, such as a clamp.

[0097] The aperture module (100) may include a circuit board (190) electrically connected to a shape memory alloy member (120). The circuit board (190) may be placed on a base (140). The circuit board (190) may be coupled to the base (140) or fixed to the base (140). The circuit board (190) may be placed on or coupled to the outer surface (or outer side) of the base (140). The circuit board (190) may be a printed circuit board or a flexible printed circuit board. The shape memory alloy member (120) may be electrically connected to the circuit board (190) by solder or a conductive adhesive.

[0098] The shape memory alloy member (120) may include a first shape memory alloy member (120A) and a second shape memory alloy member (120B) that are spaced apart from each other. The first shape memory alloy member (120A) and the second shape memory alloy member (120B) may be located on opposite sides of the optical axis (OA). The rotor (110) may rotate counterclockwise (or clockwise) due to the expansion (or contraction) of the first shape memory alloy member (120A). Conversely, the rotor (110) may rotate clockwise (or counterclockwise) due to the expansion (or contraction) of the second shape memory alloy member (120B).

[0099] The aperture module (100) may further include a position sensor (170) for detecting displacement of the blade portion (150). The position sensor (170) may detect the magnetic field of the magnet (130). The position sensor (170) may detect the displacement or position of the drive shaft (51). Alternatively, the position sensor (170) may detect the displacement or position of the rotor (110).

[0100] The position sensor (170) may be placed on the base (140). Alternatively, the position sensor (170) may be coupled to the base (140) or fixed to the base (140). The position sensor (170) may be placed on or coupled to the circuit board (190). The position sensor (170) may be electrically connected to the circuit board (190). The base (140) may include a mounting portion (45) for placing the position sensor (170). For example, the mounting portion (45) may be in the form of a groove or a through hole. At least a portion of the position sensor (170) may face or overlap with the magnet (130) in a second direction perpendicular to the first direction.

[0101] The position sensor (170) may include a plurality of sensors spaced apart from each other. For example, the position sensor (170) may include a first sensor (170A) and a second sensor (170B) spaced apart from each other. In another embodiment, the number of sensors may be equal to the number of magnet units of the magnet (130). The number of sensors of the position sensor (170) may be two or more. The first sensor (170A) and the second sensor (170B) may be spaced apart from each other in a direction perpendicular to the optical axis. The first sensor (170A) may be positioned in a direction perpendicular to the optical axis and passing through the optical axis in a corresponding, opposite, or overlapping manner with the first magnet unit (130A), and the second sensor (170B) may be positioned in a direction perpendicular to the optical axis and passing through the optical axis in a corresponding, opposite, or overlapping manner with the second magnet unit (130B).

[0102] Each of the first sensor (170A) and the second sensor (170B) may be a Hall sensor. Each of the first sensor (170A) and the second sensor (170B) may include two input terminals into which a power or driving signal is input and two output terminals into which an output signal is output. The circuit board (190) may apply a driving signal to the input terminals of the first and second sensors (170A, 170B). The circuit board (190) may receive the output signals of the first and second sensors (170A, 170B). The circuit board (190) may receive the output signals of each of the first and second sensors (170A, 170B). In another embodiment, the output terminal of the first sensor (170A) and the output terminal of the second sensor (170B) may be connected in series, and the circuit board (190) may include terminals for receiving output signals output from the output terminals of the first and second sensors (170A, 170B) connected in series.

[0103] The circuit board (190) can supply a first driving signal to a first shape memory alloy member (120A) and a second driving signal to a second shape memory alloy member (120B). That is, the circuit board (190) may include a plurality of terminals for supplying the first driving signal and the second driving signals.

[0104] In another embodiment, each of the first and second sensors (170A, 170B) may be a driver IC including a Hall sensor. In this case, each of the first and second sensors (170A, 170B) may receive power from an external source and transmit and receive data with the external source using data communication, e.g., I2C communication. Each of the sensors in the form of a driver IC may include first and second terminals for receiving a power signal, a third terminal for transmitting and receiving a clock signal, a fourth terminal for transmitting and receiving a data signal, and fifth and sixth terminals for supplying a driving signal to the shape memory alloy member (120A, 120B).

[0105] When first and second driving signals are applied to the first and second shape memory alloy members (120A, 120B), the rotor (110) can rotate clockwise or counterclockwise around the optical axis. As the rotor (110) rotates, blades (150A to 150F) connected to the driving shaft (51) (or blades (150A to 150F) into which the driving shaft (51) is inserted) can rotate within a preset range around the fixed axis (71) of the base (140).

[0106] As the blades (150A to 150F) rotate, the size of the opening (201) of the blade portion (150) may be changed stepwise or continuously. For example, the opening (201) of the blade portion (150) may be adjusted or changed to have three or more different sizes. For example, the opening (201) of the blade portion (150) may be adjusted or changed to have ten or fewer different sizes. For example, the opening (201) of the blade portion (150) may be adjusted or changed to have three or more and seven or fewer different sizes.

[0107] A rolling member (40) may be positioned between the rotor (110) and the base (140). The rolling member (40) may perform rolling or sliding motion between the base (140) and the rotor (110), thereby reducing friction between the rotor (110) and the base (140), facilitating rotation or movement of the rotor (110), and reducing the driving current or power consumption required for rotation or movement of the rotor (110).

[0108] At least a portion of the rolling member (40) may be in contact with the base (140). Also, at least another portion of the rolling member (40) may be in contact with the rotor (110). The rolling member (40) may be referred to as a "ball," "ball member," or "ball bearing." For example, the rolling member (40) may be made of a metal, ceramic, plastic, or resin material. The rolling member (40) may have a circular shape and may have a diameter of a size sufficient to support rotation or movement of the rotor (110). For example, the rolling member (40) may include a plurality of ball members (B1 to B4) or a plurality of balls. In FIG. 6, the rolling member (40) includes four ball members (B1 to B4), but in other embodiments, there may be two or three, or five or more. At least a portion of the rolling member (40) may be placed within the receiving portion (33) of the base (140).

[0109] The aperture module (100) may include a magnetic body (70) placed on a base (140). The magnetic body (70) may have an attractive force with the magnet (130). The attractive force acting between the magnet (130) and the magnetic body (70) may be expressed as "holding force," "adsorption force," or "holding force."

[0110] The magnetic body (70) may be made of a material that adheres to a magnet. For example, the magnetic body (70) may be made of a metal material. Or, for example, the magnetic body (70) may be made of a metal material that has magnetic properties. Or, for example, the magnetic body (70) may be a magnet. The magnetic body (70) may also be referred to as a "yoke," "magnetic conductive member," "magnetic member," "magnetic plate," "magnetic plate," or "magnetic yoke."

[0111] The magnetic body (70) may be placed on the circuit board (190). For example, the magnetic body (170) may be coupled to the circuit board (190). The magnetic body (70) may be positioned perpendicular to the optical axis and may be positioned opposite or overlapping with the magnet (130) in a direction passing through the optical axis. The magnetic body (70) may include a plurality of magnetic bodies corresponding to a plurality of magnet units.

[0112] For example, the magnetic body (70) may include a first magnetic body (70A) facing or overlapping with the first magnet unit (130A) and a second magnetic body (70B) facing or overlapping with the second magnet unit (130B). The number of magnetic bodies may be the same as the number of magnet units.

[0113] Referring to FIG. 9, the rotor (110) and the base (140) can press the rolling member (40) by means of the attractive force (F1, F2) between the magnetic body (70) and the magnet (130). For example, the support portion (47) of the rotor (110) and the receiving portion (33) of the base (140) can press the rolling member (40) by means of the attractive force (F1, F2) between the magnetic body (70) and the magnet (130). Since the rotor (110) and the base (140) press the rolling member (40), the rotor (110) can be in close contact with the base (140), and the rotor (110) can be stably supported by the rolling member (40). The magnetic body (70) and the magnet (130) may be a "pressure unit" or a "pressure member." When the rotor (110) rotates or moves by this pressurizing unit, contact can be maintained between the rotor (110) and the rolling member (40) and between the rolling member (40) and the base (140). The rolling member (40) can stably support the rotor (110) with respect to the base (140) by means of the attractive force between the magnet (130) and the magnetic body (94).

[0114] Referring to FIGS. 4 and FIGS. 11, one end (8A) of the first shape memory alloy member (120A) can be coupled to a first region of the base (140) by a first clamp (4A). The other end (8B) of the second shape memory alloy member (120A) can be coupled to a second region of the base (140) by a second clamp (4B). One end (9A) of the second shape memory alloy member (120B) can be coupled to a third region of the base (140) by a third clamp (4C), and the other end (9B) of the second shape memory alloy member (120B) can be coupled to a fourth region of the base (140) by a fourth clamp (4D). For example, grooves (55) for coupling the first to fourth clamps (4A to 4D) can be formed in the first to fourth regions of the base (140). Additionally, the base (140) may include at least one projection (55A, 55B) for coupling with the first to fourth clamps (4A to 4D). At least one projection (55A, 55B) may be formed in the first to fourth regions of the base (140).

[0115] The rotor (110) may include a connecting portion (38) connected to a portion of the shape memory alloy member (120). The connecting portion (38) may be disposed on the lower surface of the rotor (110). The connecting portion (38) may protrude downward from the lower surface of the rotor (110). The connecting portion (38) may be described as a "support," "protrusion," or "protrusion." The portion of the shape memory alloy member (120) connected to the connecting portion (38) (10A, 10B) may be a portion located between one end (8A, 9A) of the shape memory alloy member (120) connected to one portion of the base (140) and the other end (8B, 9B) of the shape memory alloy member (120) connected to another portion of the base (140). A portion of the shape memory alloy member (120) connected to the joint (38) (10A, 10B) may be spaced apart from one end (8A, 9A) and the other end (8B, 9B) of the shape memory alloy member (120). At this time, the portion of the portion (10A, 10B) may be referred to as a "connection area" or a "joining area."

[0116] The coupling portion (38) may include a first coupling portion (38A) connected to a first region (10A) of a first shape memory alloy member (120A) and a second coupling portion (38B) connected to a second region (10B) of a second shape memory alloy member (120B). The first coupling portion (38A) and the second coupling portion (38B) may be spaced apart from each other.

[0117] Referring to FIG. 6b, the first coupling portion (38A) may include a first groove (27A) for seating or positioning a first region (10A) of the first shape memory alloy member (120A). The first groove (27A) may be formed on the outer surface of the first coupling portion (38A). The second coupling portion (38B) may include a second groove (27B) for seating or positioning a second region (10B) of the second shape memory alloy member (120B). The second groove (27B) may be formed on the outer surface of the second coupling portion (38B). For example, the first groove (27A) and the second groove (27B) may be formed to face each other. In other embodiments, the first groove (27A) and the second groove (27B) may be omitted.

[0118] The first coupling part (38A) and the second coupling part (38B) may not be positioned perpendicular to the optical axis (OA) and on a straight line passing through the optical axis. The first coupling part (38A) and the second coupling part (38B) may be positioned asymmetrically with respect to the optical axis (OA) or the center (101).

[0119] The first shape memory alloy member (120A) may include a first end (8A) and a second end (8B) that are coupled to the base (140). For example, the first end (8A) may be coupled to a first region of the base (140) by a first clamp (4A), and the second end (8B) may be coupled to a second region of the base (140) by a second clamp (4B).

[0120] The second shape memory alloy member (120B) may include a third end (9A) and a fourth end (9B) that are coupled to the base (140). For example, the third end (9A) may be coupled to a third region of the base (140) by means of a third clamp (4C), and the fourth end (9B) may be coupled to a fourth region of the base (140) by means of a fourth clamp (4D).

[0121] The first connecting portion (38A) may be located closer to the first end (8A) of the first shape memory alloy member (120A) than to the second end (8B) of the first shape memory alloy member (120A). The first connecting portion (38A) may be located closer to the first clamp (4A) than to the second clamp (4B).

[0122] The second connecting portion (38B) may be located closer to the third end (9A) of the second shape memory alloy member (120B) than to the fourth end (9B) of the second shape memory alloy member (120B). The second connecting portion (38B) may be located closer to the third clamp (4C) than to the fourth clamp (4D).

[0123] The straight line (601) connecting the first joint (38A) and the second joint (38B) may be located between the center (101) and the straight line (602) connecting the first end (8A) of the first shape memory alloy member (120A) and the third end (9A) of the second shape memory alloy member (120B). For example, the straight line (601) may be a straight line connecting the center of the first joint (38A) and the center of the second joint (38B). The center (101) may be the center of an opening, where the opening may be the opening (401) of the rotor (110). In another embodiment, the opening may be the opening (501) of the base (140), the opening (205) of the support plate (160), or the opening (303) of the cover member (300). The first coupling part (38A) and the second coupling part (38B) of the rotor (110) can be positioned closer to the straight line (602) than to the straight line (603).

[0124] The first end (8A) of the first shape memory alloy member (120A) and the third end (9A) of the second shape memory alloy member (120B) may be located on the same side (e.g., the upper side) with respect to the straight line (601). The second end (8B) of the first shape memory alloy member (120A) and the fourth end (9B) of the second shape memory alloy member (120B) may be located on the same side (e.g., the lower side) with respect to the straight line (601). The second end (8B) of the first shape memory alloy member (120A) and the fourth end (9B) of the second shape memory alloy member (120B) may be located on opposite sides of the first end (8A) and the third end (9A) with respect to the straight line (601).

[0125] The straight line (601) may be located closer to the straight line (602) than to the straight line (603) connecting the second end (8B) of the first shape memory alloy member (120A) and the fourth end (9B) of the second shape memory alloy member (120B).

[0126] Referring to FIG. 12, a first driving signal may be applied to a first shape memory alloy member (120A), and the first shape memory alloy member (120A) may expand or contract. A second driving signal may be applied to a second shape memory alloy member (120B), and the second shape memory alloy member (120B) may contract or expand.

[0127] For example, when the first shape memory alloy member (120A) contracts and the second shape memory alloy member (120B) expands, the rotor (110) can rotate counterclockwise by a preset angle. When the first shape memory alloy member (120A) expands and the second shape memory alloy member (120B) contracts, the rotor (110) can rotate clockwise by a preset angle.

[0128] The length between one end of the shape memory alloy member (120) and a portion of the shape memory alloy member (120) (10A, 10B) may differ from the second length (L2) between the other end of the shape memory alloy member (120) and a portion of the shape memory alloy member (120) (10A, 10B).

[0129] The first length (L1) between the first end (8A) of the first shape memory alloy member (120A) and the first region (10A) of the first shape memory alloy member (120A) may be smaller than the second length (L2) between the second end (8B) of the first shape memory alloy member (120A) and the first region (10A) of the first shape memory alloy member (120A). <L2). 로터(110)의 스트로크 범위(901) 내에서 제1 길이(L1)와 제2 길이(L2)는 변화할 수 있다. 로터(110)의 스트로크 범위(901) 내에서 제1 길이(L1)는 제2 길이(L2)보다 작을 수 있다.

[0130] Additionally, the third length (L3) between the third end (9A) of the second shape memory alloy member (120B) and the second region (10B) of the second shape memory alloy member (120B) may be smaller than the fourth length (L4) between the fourth end (9B) of the second shape memory alloy member (120B) and the second region (10B) of the second shape memory alloy member (120B). Within the stroke range (901) of the rotor (110), the third length (L3) may be smaller than the fourth length (L4).

[0131] Within the stroke range of the rotor (110), the second length (L2) may be greater than or equal to 1.3 times the first length (L1) and less than or equal to 1.7 times. Also, within the stroke range of the rotor (110), the fourth length (L4) may be greater than or equal to 1.3 times the third length (L3) and less than or equal to 1.7 times.

[0132] If the second length (L2) (or the fourth length (L4)) is less than 1.3 times the first length (L1) (or the third length (L3)), the difference between the first length (L1) (or the third length (L3)) and the second length (L2) (or the fourth length (L4)) is small, so the driving force for rotating the rotor (110) becomes too small, and as a result, the power consumption for rotating the rotor (110) may increase.

[0133] If the second length (L2) (or the fourth length (L4)) exceeds 1.7 times the first length (L1) (or the third length (L3)), the force received by the region of the first shape memory alloy member (120A) (or the second shape memory alloy member (120B)) corresponding to the first length (L1) (or the third length (L3)) increases too much, and a break in the first shape memory alloy member (120A) may occur.

[0134] Referring to FIG. 11, when viewed from above or in the direction of the optical axis, the cloud member (40) may include ball members (B1, B2) disposed in a region of the base (140) located between the first end (8A) of the first shape memory alloy member (120A) and the third end (9A) of the second shape memory alloy member (120B).

[0135] Additionally, when viewed from above or in the direction of the optical axis, the cloud member (40) may include ball members (B3, B4) disposed in different regions of the base (140) located between the second end (8B) of the first shape memory alloy member (120A) and the fourth end (9B) of the second shape memory alloy member (120B).

[0136] When viewed from above, the straight line connecting the center of the first magnet unit (130A) and the center of the second magnet unit (130B) may not overlap with the first and second shape memory alloy members (120A, 120B).

[0137] Additionally, when viewed from above or in the direction of the optical axis, the first magnet unit (120A) and the first magnetic body (70A) may be located between the first end (8A) of the first shape memory alloy member (120A) and the third end (9A) of the second shape memory alloy member (120B). For example, when viewed from above or in the direction of the optical axis, the straight line connecting the first magnet unit (120A) and the first magnetic body (70A) may be located between the two ball members (B1, B2). As a result, the force with which the rotor (110) and the base (140) press against the ball members (B1, B2) can be enhanced by the attractive force between the first magnet unit (120A) and the first magnetic body (70A), and the rotor (110) can be stably supported.

[0138] Additionally, when viewed from above or in the direction of the optical axis, the second magnet unit (120B) and the second magnetic body (70B) may be located between the other end (8B) of the first shape memory alloy member (120A) and the other end (9B) of the second shape memory alloy member (120B). For example, when viewed from above or in the direction of the optical axis, the straight line connecting the second magnet unit (120B) and the second magnetic body (70B) may be located between the other two ball members (B3, B4). As a result, the force with which the rotor (110) and the base (140) press against the ball members (B3, B4) can be enhanced by the attractive force between the second magnet unit (120B) and the second magnetic body (70B), and the rotor (110) can be stably supported.

[0139] Since the longitudinal displacement of the shape memory alloy member is small, approximately 1% to 2% of its length, a mechanism (or component) may be provided separately from the shape memory alloy to secure a practical stroke range of the actuator. Although the stroke range of the actuator can be increased by utilizing the bending of the mechanism, this separate mechanism may increase the thickness of the actuator and degrade reliability, and continuous control of the stroke is difficult because the degree of bending varies from component to component.

[0140] In the embodiment, both ends (8A and 8B, 9A and 9B) of the shape memory alloy member (120) are fixed to a base (140) which is a fixed part, and some regions (10A, 10B) of the shape memory alloy member (120) are connected to the coupling part (38) of the rotor (110), so the stroke range (901) of the rotor (110) can be increased.

[0141] The driving of the shape memory alloy member (120) can be expressed by the equation of an ellipse, where one end (8A, 9A) and the other end (8B, 9B) of the shape memory alloy member (120) may correspond to two foci of the ellipse, and the coupling portion (38) of the rotor (110) may be positioned on the ellipse by the movement (or rotation) of the rotor (110). The ellipse may become larger or smaller depending on the contraction or expansion of the shape memory alloy member (120). The stroke range of the rotor (110) may be increased by the movement of the coupling portion (38) of the rotor (110).

[0142] In the embodiment, the blade portion (150) is driven using a shape memory alloy member (120), so a stroke for the aperture module can be implemented without a separate mechanism, and the number of parts of the aperture module can be reduced.

[0143] In the embodiment, the rotor (110) and the base (140) are arranged vertically, and a rolling member (40) is arranged between the rotor (110) and the base (140), so the assembly between the rotor (110) and the base (140) can be simple and simplified. As the assembly is simple and simplified in this way, the structure of the rotor (110) and the base (140) can be simplified, and as a result, the assembly deviation can be reduced.

[0144] In addition, in the embodiment, the shape memory alloy member (120) is positioned between the rotor (110) and the base (140), so the size (or length) of the aperture module in the optical axis direction can be reduced.

[0145] In addition, when compared to an aperture module using a magnet and a coil for moving the brace part, in the embodiment, a shape memory alloy member (120) is used, so the size of the aperture module can be reduced.

[0146] In the embodiment, both ends (8A and 8B, 9A and 9B) of the shape memory alloy member (120) are fixed to a base (140) which is a fixed part, and some regions (10A, 10B) of the shape memory alloy member (120) are connected to the coupling part (38) of the rotor (110), so the stress or change in stress of the shape memory alloy member (120) can be reduced, and the reliability and stability of driving the aperture module can be improved.

[0147] FIG. 13 shows the first and second coupling portions (38A, 38C) of a rotor (110-1) according to another embodiment.

[0148] Referring to FIG. 13, the second coupling portion (38C) of the rotor (110-1) may be located closer to the fourth end (9B) of the second shape memory alloy member (120B) than to the third end (9A) of the second shape memory alloy member (120B). The second coupling portion (38C) may be located closer to the fourth clamp (4D) than to the third clamp (4C). The second coupling portion (38C) of the rotor (110-1) may be located closer to the straight line (603) than to the straight line (602).

[0149] Also, in FIG. 13, the third length (L31) between the third end (9A) of the second shape memory alloy member (120B) and the second region (10B) of the second shape memory alloy member (120B) may be greater than the fourth length (L41) between the fourth end (9B) of the second shape memory alloy member (120B) and the second region (10B) of the second shape memory alloy member (120B) (L31 > L41). Within the stroke range (901) of the rotor (110), the third length (L31) may be greater than the fourth length (L41). Within the stroke range of the rotor (110), the third length (L31) may be greater than or equal to 1.3 times the fourth length (L41) and less than or equal to 1.7 times the fourth length (L41).

[0150] In FIG. 13, the first coupling part (38A) of the rotor (110) may be located on one side of the straight line (604), and the second coupling part (38C) of the rotor (110) may be located on the other side of the straight line (604). At this time, the straight line (604) may be a straight line perpendicular to the optical axis, passing through the center (101), and parallel to the straight line (602, or 603).

[0151] In FIG. 13, the first shape memory alloy member (120A) and the second shape memory alloy member (120B) can be contracted simultaneously, and the rotor (110) can be rotated counterclockwise. Additionally, the first shape memory alloy member (120A) and the second shape memory alloy member (120B) can be expanded simultaneously, and the rotor (110) can be rotated clockwise.

[0152] FIGS. 1 to 13 illustrate two shaped alloy members (120A, 120B) and two corresponding joints of the rotor (38A and 38B, or 38A and 38C), but in other embodiments, either of the two shaped alloy members (120A, 120B) and either of the two joints of the rotor (110) (38A and 38B, or 38A and 38C) may be omitted.

[0153] FIG. 14 is a perspective view of a camera device (200) according to an embodiment.

[0154] Referring to FIG. 14, the camera device (200) may include an aperture module (100) and a lens module (400). The camera device (200) may include a lens driving device (1000) that moves the lens module (400). Additionally, the camera device (200) may include an image sensor (810) facing the lens module (400) in a first direction. Light passing through the aperture module (100) and the lens module (400) may be incident on the image sensor (810).

[0155] The lens driving device (1000) can perform an auto-focusing operation. For example, the lens driving device (1000) may include an "auto-focusing unit" for performing an auto-focusing operation. The auto-focusing unit can move the lens module (10) in the direction of the optical axis.

[0156] The lens driving device (1000) may include an OIS (Optical Image Stabilization) unit that performs an OIS operation for hand shake correction. The OIS unit may move the lens module (400) in a direction perpendicular to the optical axis.

[0157] The image sensor (810) can perform the function of converting light that has passed through the lens module (400) into image data. For example, the image sensor (810) can convert light into an analog signal through a pixel array including a plurality of pixels and generate image data by synthesizing a digital signal corresponding to the analog signal.

[0158] The camera device (200) may further include a filter (610) positioned between the lens module (400) and the image sensor (810). The filter (610) may serve to block light of a specific frequency band from passing through the lens module (400) from entering the image sensor (810). For example, the filter (610) may be an infrared blocking filter, but is not limited thereto.

[0159] The camera device (200) may further include a circuit board (800) electrically connected to an image sensor (810). The circuit board (800) may be placed below the image sensor (810). The circuit board (800) may be placed below the lens driving device (1000). The circuit board (800) may be a printed circuit board. The circuit board (800) may include a connector (840) for electrical connection with the outside.

[0160] The camera device (200) may further include a sensor base (600) for mounting or placing a filter (610). The sensor base (600) may be placed between the lens driving device (1000) and the circuit board (800). The filter (610) may be placed on the sensor base (600). Alternatively, the filter (610) may be coupled to the sensor base (600) or fixed to the sensor base (600). The sensor base (600) may be coupled to the circuit board (800). In another embodiment, the sensor base (600) may be omitted, and the filter (610) may be placed on the lens driving device (1000) or coupled to the lens driving device (1000).

[0161] In addition, the camera device (200) according to the embodiment may be included in an optical instrument that aims to increase the visual acuity of the eye by using light characteristics such as reflection, refraction, absorption, interference, and diffraction to form an image of an object in space, or to record and reproduce an image by a lens, or to perform optical measurement, propagation or transmission of an image, etc. For example, the optical instrument according to the embodiment may be a mobile device, mobile phone, smartphone, portable smart device, digital camera, laptop computer, digital broadcasting terminal, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), navigation, etc., but is not limited thereto, and any device for taking images or photos is possible.

[0162] FIG. 15a shows a perspective view of an optical device (200A) according to an embodiment, FIG. 15b shows a perspective view of an optical device (200X) according to another embodiment, and FIG. 16 shows a configuration diagram of the optical device (200A) shown in FIG. 15a and FIG. 15b.

[0163] For example, the embodiment of FIG. 15a may include a front camera in which the lens module (10) of the camera device (200) is positioned to face the front of the body (850), and the embodiment of FIG. 15b may include a rear camera in which the lens module (10) of the camera device (200) is positioned to face the rear of the body (850) of the optical device (200A). FIG. 15b illustrates an example in which two rear cameras are positioned, but in other embodiments, one or three or more rear cameras may be positioned. In other embodiments, the camera device (200) may be used for both the front camera and the rear camera.

[0164] Referring to FIG. 15a, FIG. 15b, and FIG. 16, the optical device (200A) may include a body (850), a wireless communication unit (710), an A / V input unit (720), a sensing unit (740), an input / output unit (750), a memory unit (760), an interface unit (770), a control unit (780), and a power supply unit (790).

[0165] The body (850) is in the form of a bar, but is not limited thereto, and can be of various structures such as a slide type, folder type, swing type, swivel type in which two or more sub-bodies are combined to move relative to each other.

[0166] The wireless communication unit (710) may be configured to include one or more modules that enable wireless communication between the optical device (200A) and the wireless communication system or between the optical device (200A) and the network where the optical device (200A) is located. For example, the wireless communication unit (710) may be configured to include a broadcast reception module (711), a mobile communication module (712), a wireless internet module (713), a short-range communication module (714), and a location information module (715).

[0167] The A / V (Audio / Video) input section (720) is for inputting audio or video signals and may include a camera (721) and a microphone (722), etc.

[0168] The camera (721) may include a camera device (200) according to an embodiment.

[0169] The sensing unit (740) can generate a sensing signal to control the operation of the optical device (200A) by detecting the current state of the optical device (200A), such as the open / closed state of the optical device (200A), the position of the optical device (200A), whether there is user contact, the orientation of the optical device (200A), and the acceleration / deceleration of the optical device (200A). For example, if the optical device (200A) is in the form of a slide phone, it can sense whether the slide phone is open or closed. In addition, it is responsible for sensing functions related to whether power is supplied by the power supply unit (790) and whether an external device is connected to the interface unit (770).

[0170] The input / output unit (750) is intended to generate input or output related to sight, hearing, or touch. The input / output unit (750) can generate input data for controlling the operation of the optical device (200A) and can also display information processed by the optical device (200A).

[0171] The input / output unit (750) may include a keypad unit (730), a display module (751), an audio output module (752), and a touch screen panel (753). The keypad unit (730) may generate input data by keypad input.

[0172] The display module (751) may include a plurality of pixels whose color changes according to an electrical signal. For example, the display module (751) may include at least one of a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, and a 3D display.

[0173] The sound output module (752) can output audio data received from the wireless communication unit (710) in call signal reception, call mode, recording mode, voice recognition mode, or broadcast reception mode, or output audio data stored in the memory unit (760).

[0174] The touch screen panel (753) can convert a change in capacitance caused by a user's touch on a specific area of ​​the touch screen into an electrical input signal.

[0175] The memory unit (760) may store a program for processing and controlling the control unit (780), and may temporarily store input / output data (e.g., phone book, message, audio, still image, photo, video, etc.). For example, the memory unit (760) may store an image captured by the camera (721), such as a photo or video.

[0176] The interface section (770) serves as a passage connecting to an external device connected to the optical device (200A). The interface section (770) receives data from the external device, supplies power to transmit it to each component inside the optical device (200A), or allows data inside the optical device (200A) to be transmitted to the external device. For example, the interface section (770) may include a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device equipped with an identification module, an audio I / O (Input / Output) port, a video I / O (Input / Output) port, and an earphone port.

[0177] The controller (780) can control the overall operation of the optical device (200A). For example, the controller (780) can perform related control and processing for voice calls, data communication, video calls, etc.

[0178] The control unit (780) may be equipped with a multimedia module (781) for multimedia playback. The multimedia module (781) may be implemented within the control unit (780) or may be implemented separately from the control unit (780).

[0179] The control unit (780) can perform pattern recognition processing to recognize handwriting input or drawing input performed on the touchscreen as characters and images, respectively.

[0180] The power supply unit (790) can receive external power or internal power under the control of the control unit (780) and supply power necessary for the operation of each component.

[0181] The features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment may be combined or modified and implemented in other embodiments by a person skilled in the art to which the embodiments belong. Therefore, details regarding such combinations and modifications should be interpreted as being included within the scope of the present invention.

[0182] The modes for carrying out the invention have been sufficiently described in the aforementioned "best mode for carrying out the invention."

[0183] The present invention relates to a lens module and a camera device, and can be used in a camera device and an optical device capable of increasing the stroke range and reducing the length in the direction of the optical axis.

Claims

1. Bass; A rotor disposed on the above base and including a coupling portion; A ball member disposed between the base and the rotor; A shape memory alloy member that rotates the rotor, comprising one end and the other end coupled to the base and a region connected to the coupling portion of the rotor; and It includes a blade portion connected to the rotor and having an opening whose size varies by the rotation of the rotor, and The coupling portion of the rotor is an aperture module positioned closer to the one end of the shape memory alloy member than to the other end of the shape memory alloy member.

2. In Paragraph 1, The one end and the other end of the shape memory alloy member are coupled to the upper surface of the base, and the coupling portion is an aperture module that is a projection protruding from the lower surface of the rotor.

3. In Paragraph 1, An aperture module in which the first length between the end of the shape memory alloy member and the region of the shape memory alloy member is smaller than the second length between the other end of the shape memory alloy member and the region of the shape memory alloy member.

4. In Paragraph 3, The above second length is greater than or equal to 1.3 times the above first length and less than or equal to 1.7 times the above aperture module.

5. In Paragraph 1, The region of the shape memory alloy member is an aperture module located inside the one end and the other end of the shape memory alloy member.

6. In Paragraph 1, The coupling portion of the above rotor includes a first coupling portion and a second coupling portion spaced apart from each other, and The above shape memory alloy member is, A first shape memory alloy member comprising a first end and a second end coupled to the base, and a first region connected to the first coupling portion of the rotor; and An aperture module comprising a second shape memory alloy member including a third end and a fourth end coupled to the base, and a second region connected to the second coupling portion of the rotor.

7. In Paragraph 6, An aperture module in which the first length between the first end and the first region of the first shape memory alloy member is smaller than the second length between the second end and the first region of the first shape memory alloy member.

8. In Paragraph 7, An aperture module in which the third length between the third end and the second region of the second shape memory alloy member is smaller than the fourth length between the fourth end and the second region of the second shape memory alloy member.

9. In Paragraph 8, The first end and the third end are located on the same side with respect to the first straight line connecting the first joint and the second joint, and The second end and the fourth end are aperture modules located opposite the first end and the third end with respect to the first straight line.

10. In Paragraph 8, The first end and the fourth end are located on the same side with respect to the first straight line connecting the first joint and the second joint, and The second end and the third end are aperture modules located opposite the first end and the fourth end with respect to the first straight line.

Images