Actuator and camera device including the same

Abstract

An embodiment includes: a lens barrel; a magnet disposed on the lens barrel; and a coil that moves the lens barrel in a first direction by interaction with the magnet, in which: the coil includes a first coil unit, a second coil unit, and a third coil unit arranged in the first direction; the magnet overlaps the first to third coil units in a second direction perpendicular to the first direction; and the length of the magnet in the first direction is smaller than the sum of the lengths of the first to third coil units in the first direction.

Description

Technical Field

[0001] Embodiments relate to an actuator and a camera device including the actuator. Background Art

[0002] The camera device is a device that takes a photo or video of a subject, and is installed in a portable device, a drone, a vehicle, etc. In order to improve the quality of an image, the camera device may have an image stabilization (IS) function that corrects or prevents image shaking caused by the movement of the user, such as an optical image stabilization (OIS) function, an auto focus (AF) function, and / or a zoom function. Summary of the invention

[0003]

Technical issues

[0004] Embodiments provide an actuator capable of ensuring a uniform and stable driving force for movement of a moving unit in an optical axis direction and capable of increasing a stroke range of the moving unit, and a camera apparatus including the same.

[0005]

Technical solution

[0006] An actuator according to one embodiment includes a lens barrel, a magnet disposed on the lens barrel, and a coil configured to move the lens barrel in a first direction by interacting with the magnet. The coil includes a first coil unit, a second coil unit, and a third coil unit disposed in the first direction. The magnet overlaps the first coil unit, the second coil unit, and the third coil unit in a second direction perpendicular to the first direction, and the length of the magnet in the first direction is less than the sum of the lengths of the first coil unit, the second coil unit, and the third coil unit in the first direction.

[0007] A length of the magnet in the first direction may be greater than a sum of lengths of two coil units of the first coil unit, the second coil unit, and the third coil unit in the first direction.

[0008] Signals with different phases may be supplied to the first coil unit, the second coil unit, and the third coil unit, respectively. Alternating current signals with different phases may be supplied to the first coil unit, the second coil unit, and the third coil unit, respectively. Signals with a phase difference of 120 degrees may be supplied to the first coil unit, the second coil unit, and the third coil unit, respectively. Alternating currents with a phase difference of 120 degrees may be supplied to the first coil unit, the second coil unit, and the third coil unit, respectively.

[0009] The magnet may include: a first magnet portion including an N pole and an S pole facing each other in the second direction; a second magnet portion including an N pole and an S pole facing each other in the second direction, and a partition wall disposed between the first magnet portion and the second magnet portion. The first magnet portion and the second magnet portion may be disposed in the first direction with the partition wall interposed therebetween.

[0010] The length of the first magnet portion in the first direction may be greater than the length of each of the first coil unit, the second coil unit, and the third coil unit in the first direction, and the length of the second magnet portion in the first direction is greater than the length of each of the first coil unit, the second coil unit, and the third coil unit in the first direction.

[0011] The length of the first magnet part in the first direction may be greater than the length of the first coil unit in the first direction. The length of the second magnet part in the first direction may be greater than the length of the first coil unit in the first direction.

[0012] Each of the first, second, and third coil units may have a ring shape including a cavity formed therein, and a length of the partition wall in the first direction may be greater than a length of the cavity in the first direction.

[0013] The first coil unit may have a ring shape including a cavity formed therein, and a length of the partition wall in the first direction may be greater than a length of the cavity in the first coil unit in the first direction.

[0014] The first magnet portion and the second magnet portion may have a first spacing therebetween, the first spacing being greater than a second spacing between two adjacent coil units among the first coil unit, the second coil unit, and the third coil unit. The first spacing may be a distance between a center of the first magnet portion and a center of the second magnet portion, and the second spacing may be a distance between a center of a cavity of one coil unit among the two adjacent coil units and a center of a cavity in the remaining coil unit among the two adjacent coil units.

[0015] The length of the magnet in the third direction may be smaller than the length of the magnet in the first direction, and the third direction may be perpendicular to each of the first direction and the second direction. The length of the magnet in the third direction may be smaller than the length of each of the first coil unit, the second coil unit, and the third coil unit in the third direction.

[0016] The actuator may include a first sensor disposed in a cavity of the first coil unit and a second sensor disposed in a cavity of the third coil unit.

[0017] An actuator according to another embodiment includes a first lens barrel, a first magnet disposed on the first lens barrel, and a first coil configured to move the first lens barrel in a first direction by interacting with the first magnet. The first coil includes six coil units disposed in the first direction. The first magnet includes: a first magnet portion including an N pole and an S pole, a second magnet portion including an S pole and an N pole, and a partition wall disposed between the first magnet portion and the second magnet portion. The length of the first magnet portion in the first direction may be greater than the length of each of the six coil units of the first coil in the first direction.

[0018] The length of the second magnet portion in the first direction may be greater than the length of each of the six coil units of the first coil in the first direction. The first magnet may overlap with three adjacent coil units of the six coil units of the first coil in a second direction perpendicular to the first direction. The length of the first magnet in the first direction may be greater than the sum of the lengths of two adjacent coil units of the six coil units. The length of the first magnet in the first direction may be less than the sum of the lengths of three adjacent coil units of the six coil units. Signals having a phase difference of 120 degrees from each other may be supplied to three adjacent coil units of the six coil units of the first coil, respectively.

[0019] Alternating currents having a phase difference of 120 degrees from each other may be supplied to three adjacent coil units among the six coil units of the first coil, respectively.

[0020] An actuator according to another embodiment may include a second lens barrel, a second magnet disposed on the second lens barrel, and a second coil configured to move the second lens barrel in a first direction by interacting with the second magnet. The second coil may include six coil units disposed in the first direction. The second magnet may include: a third magnet portion including an N pole and an S pole, a fourth magnet portion including an S pole and an N pole, and a partition wall disposed between the third magnet portion and the fourth magnet portion. The length of the third magnet portion in the first direction may be greater than the length of each of the six coil units of the second coil in the first direction.

[0021]

Beneficial effects

[0022] As is apparent from the above description, according to the present embodiment, the magnet and the three coil units to which the three-phase drive current is supplied have appropriate sizes and a setting relationship therebetween, so that the driving force in the optical axis direction does not vary much. Therefore, a uniform driving force in the optical axis direction can be obtained, and thus the accuracy of the zoom operation and the autofocus operation of the lens assembly can be improved.

[0023] In addition, in the embodiment, since the six coil units are sequentially disposed in the optical axis direction, the movable distance of the magnet can be increased, and accordingly, the stroke range of the lens assembly can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of an actuator according to an embodiment;

[0025] Figure 2 yes Figure 1 An exploded perspective view of the actuator shown in ;

[0026] Figure 3A is along Figure 1 A cross-sectional view taken along line AB in the actuator shown in ;

[0027] Figure 3B is along Figure 1 A cross-sectional view taken along line CD in the actuator shown in ;

[0028] Figure 4A is a first perspective view of the housing;

[0029] Figure 4B is a second perspective view of the housing;

[0030] Figure 5A is a first exploded perspective view of the lens unit and the driver;

[0031] Figure 5B is a second exploded perspective view of the lens unit and the driver;

[0032] Fig. 6A is a plan view of a first magnet, a coil unit of a first coil, and a position sensor;

[0033] Figure 6B is a schematic cross-sectional view of a coil unit of a first magnet and a first coil;

[0034] Figure 7 shows a driving signal supplied to the coil unit of the first coil;

[0035] Figure 8 shows first to third driving signals supplied to first to third coil units;

[0036] Fig. 9 shows electromagnetic forces between first to third coil units supplied with first to third driving signals and the first magnet;

[0037] Fig.10 shows magnetic forces generated from first to sixth coil units supplied with first to third driving signals and a magnetic force generated from a first magnet;

[0038] Fig.11 shows an arrangement of two coil units and magnets according to a comparative example;

[0039] Fig.12 Shown by Fig.11 The Lorentz force generated by the interaction between the coil unit and the magnet shown in;

[0040] Fig.13 is a schematic diagram of a camera device according to an embodiment;

[0041] Fig.14 is a perspective view of an optical instrument according to an embodiment; and

[0042] Fig.15 yes Fig.14 The configuration diagram of the optical instrument shown in FIG. DETAILED DESCRIPTION

[0043] Hereinafter, embodiments of the present disclosure that can specifically achieve the above-described objects will be described with reference to the accompanying drawings.

[0044] In the following description of the embodiments, it should be understood that when each element is referred to as being "on" or "under" another element, the element may be directly on or under another element, or may be indirectly formed so that one or more intermediate elements are present. In addition, when an element is referred to as being "on or under", "under an element" as well as "on an element" may be included based on the element.

[0045] In addition, the relative terms "first", "second", "upper / upper component / above" and "lower / lower component / below" are used herein only to distinguish between one object or element and another object or element, and do not necessarily require or involve any physical or logical relationship or order between these objects or elements. Where possible, the same reference numerals will be used to refer to the same parts throughout the drawings.

[0046] In addition, the terms "including", "comprising", and "having" described herein should be interpreted not to exclude other elements but also to include such other elements, because corresponding elements may be inherent unless otherwise mentioned. In addition, the term "corresponding to" described herein may encompass at least one of the meanings of "facing" and "overlapping".

[0047] Hereinafter, a camera device according to an embodiment and an optical instrument including the camera device will be described with reference to the accompanying drawings. For ease of description, a Cartesian coordinate system (x, y, z) will be used to describe the camera device according to the embodiment, but the embodiment is not limited thereto and other coordinate systems may be used for description. In the corresponding drawings, the X-axis and the Y-axis may be directions perpendicular to the Z-axis, and the Z-axis is the optical axis (OA) direction.

[0048] In addition, the Z-axis direction as the optical axis (OA) direction may be referred to as “any one of the first direction, the second direction, and the third direction”, the X-axis direction may be referred to as “the other of the first direction, the second direction, and the third direction”, and the Y-axis direction may be referred to as “the remaining one of the first direction, the second direction, and the third direction”. In addition, the Y-axis may be referred to as the “first axis”, and the Y-axis direction may be referred to as the “first axis direction”. The X-axis may be referred to as the “second axis”, and the X-axis direction may be referred to as the “second axis direction”. For example, the optical axis direction may be the direction of the optical axis (OA) of the lens unit 620 or a direction parallel to the optical axis.

[0049] The actuator according to the embodiment may perform an auto focus function and a zoom function. The auto focus function may be a function of automatically focusing on an object by moving the lens in the optical axis direction according to the distance from the object so that the image sensor obtains a clear image of the object. The zoom function may be a function of photographing an object by increasing or decreasing the magnification of a distant object through a zoom lens.

[0050] The camera device according to the embodiment may perform a hand shake compensation function, which may be a function of moving the lens in a direction perpendicular to the optical axis direction or tilting the lens relative to the optical axis to eliminate vibration (or movement) caused by hand shake of the user.

[0051] Hereinafter, the “actuator” may be alternatively referred to as a “lens moving device,” a “lens driving device,” or a “motor.” In addition, the “camera device” may be alternatively referred to as a “camera,” a “camera module,” an “image capturing device,” or a “photographing device.”

[0052] Figure 1 is a perspective view of an actuator 100 according to an embodiment, Figure 2 yes Figure 1 An exploded perspective view of the actuator 100 is shown in FIG. Figure 3A is along Figure 1 A cross-sectional view taken along line AB in the actuator 100 shown in FIG. Figure 3B is along Figure 1 A cross-sectional view taken along line CD of the actuator 100 shown in FIG. Figure 4A is a first perspective view of the housing 610, Figure 4B is a second perspective view of the housing 610, Figure 5A is a first exploded perspective view of the lens unit 620 and the driver 630, and Figure 5B 6 is a second exploded perspective view of the lens unit 620 and the driver 630. Figure 1 Omitted Figure 2 and Figure 5BAn illustration of covers 614 and 615 and yokes 48 and 49 is shown in FIG.

[0053] The actuator 100 may move the lens assemblies 622 and 624 in the optical axis direction, thereby performing an auto focus function and / or a zoom function, and may be alternatively referred to as a “first driver” or an “AF / zoom driver”.

[0054] Reference Figures 1 to 5B , the actuator 100 may include a lens unit 620 and a driver 630 configured to move the lens unit 620 in a first direction (eg, an optical axis direction or a Z-axis direction).

[0055] The actuator 100 may include a housing 610 that accommodates or supports a lens unit 620 and a driver 630. For example, the lens unit 620 may be disposed in the housing 610. The lens unit 620 may be a "moving unit" configured to be movable in a first direction relative to a fixed unit. For example, the fixed unit may include the housing 610 and at least one of the components coupled to the housing 610, such as the coil 120, the position sensor 170, the circuit board 190, the yokes 48 and 49, and the covers 614 and 615.

[0056] The lens unit 620 may alternatively be referred to as a “lens assembly.” For example, the lens unit 620 may include a plurality of lens assemblies.

[0057] like Figure 2 As shown in , lens unit 620 may include two lens components 622 and 624. In another embodiment, lens unit 630 may include three or more lens components. For example, lens component 622 and lens component 624 may be arranged to correspond to, face, or overlap each other in a first direction.

[0058] The actuator 100 may further include a lens assembly 640 disposed in front of the lens unit 620. For example, the lens assembly 640 may be disposed opposite to the lens assembly 624 relative to the lens assembly 622. For example, the lens assembly 640 may be a fixed lens assembly that is fixed in position rather than movable in the optical axis direction.

[0059] The lens assembly 640 may include a first lens array 642 (or a first lens group). For example, the lens assembly 640 may further include a lens barrel 641 coupled to the first lens array 642. In addition, the lens assembly 640 may further include a housing 643 coupled to the lens barrel 641. The housing 643 may be disposed in front of the housing 610. The housing 643 may be coupled to the housing 610.

[0060] Although the lens assembly 640 is described as being included in the actuator 100, the present disclosure is not limited thereto. In another embodiment, the lens assembly 640 may be implemented as a separate component rather than being included in the actuator 100. In yet another embodiment, the lens assembly 640 may be omitted.

[0061] In an embodiment, any one of lens assemblies 640, 622, and 624 may be referred to as a “first lens assembly,” another one of lens assemblies 640, 622, and 624 may be referred to as a “second lens assembly,” and the remaining one of lens assemblies 640, 622, and 624 may be referred to as a “third lens assembly.” For example, in an embodiment, first lens assembly 640 may be a fixed lens group, and each of second lens assembly 622 and third lens assembly 624 may include a moving lens group or lens groups.

[0062] For example, the first lens assembly 640 can be used as a focuser for imaging parallel light at a specific position. In addition, the second lens assembly 622 can be used as a converter for re-imaging the image formed by the first lens assembly 640 as a focuser at another position.

[0063] At the same time, since the distance to the object or the image distance changes significantly, the magnification can change significantly in the second lens assembly 622, and the second lens assembly 622 as a converter can play an important role in the change of the focal length or magnification of the optical system. At the same time, the image point formed by the second lens assembly 622 as a converter can be slightly different depending on the position.

[0064] In addition, the third lens assembly 624 can perform a position compensation function for the image formed by the converter. For example, the third lens assembly 624 can be used as a compensator, which performs the function of accurately forming an image point on the pixel of the image sensor 540, which is formed by the second lens assembly 622 as a converter.

[0065] For example, the second lens assembly 622 may be a zoom lens assembly that performs a zoom function, and the third lens assembly 624 may be a focus lens assembly that performs a focus function.

[0066] The housing 610 may alternatively be referred to as a "base," "holder," or "case."

[0067] The housing 610 may have a polyhedron (eg, a rectangular parallelepiped) shape in which a space is defined to accommodate or support the lens unit 620 and the driver 630 .

[0068] For example, the housing 610 may include a body 612 including an upper portion (or upper plate) 142A, a lower portion (or lower plate) 142B, and a plurality of side portions 141 - 1 to 141 - 4 disposed between the upper portion 142A and the lower portion 142B.

[0069] The side portions 141-1 to 141-4 may alternatively be referred to as “side panels” or “side walls.” For example, the first side portion 141-1 and the second side portion 141-2 may face each other or may be positioned opposite to each other in the second direction (e.g., the Y-axis direction), and the third side portion 141-3 and the fourth side portion 141-4 may face each other or may be positioned opposite to each other in the first direction.

[0070] A first opening (or first hole) 41A may be formed in the side portion 141 - 3 of the housing 610 to expose one end of the lens unit 620 , and a second opening (or second hole) 41B may be formed in the side portion 141 - 4 of the housing 610 to expose the other end of the lens unit 620 .

[0071] In addition, an opening (or third hole) 41C may be formed in the side portion 141-1 of the housing 610 so that the first coil 120A can be arranged or placed therein, and an opening (or fourth hole) 41D may be formed in the side portion 141-4 of the housing 610 so that the second coil 120B can be arranged or placed therein. Each of the openings 41C and 41D may be formed in a through-hole shape. In another embodiment, each of the openings 41C and 41D may be formed in a recessed shape. In an example, each of the openings 41C and 41D may include two or more openings. In another embodiment, the number of each of the openings 41C and 41D may be one.

[0072] In order to guide the movement of the lens unit 620 in the optical axis direction, the housing 610 may include at least one guide portion 43 formed on an inner surface thereof.

[0073] For example, at least one guide portion 43 may include at least one protrusion 44A to 44D formed on at least one of the upper portion 142A or the lower portion 142B of the housing 610. In addition, the guide portion 43 may include at least one groove 43A to 43D formed between at least one protrusion 44A to 44D and a side portion of the housing 610.

[0074] For example, the first protrusion 44A may be provided on the inner surface of the lower portion 142B of the housing 610, and the second protrusion 44B may be formed on the inner surface of the upper portion 142A of the housing 610 so as to correspond to, face, or overlap the first protrusion 44A in a third direction (e.g., the X-axis direction). The first protrusion 44A and the second protrusion 44B may be provided on the inner surface of the side portion 141-1 of the housing 610 so as to be spaced apart from each other at a predetermined interval.

[0075] For example, the first groove 43A may be formed in the inner surface of the lower portion 142B of the housing 610. The first groove 43A may be disposed adjacent to the lower portion of the inner surface of the side portion 141-1 of the housing 610. For example, the first groove 43A may be formed between the first protrusion 44A and the inner surface of the side portion 141-1 of the housing 610.

[0076] For example, the second groove 43B may be formed in the inner surface of the upper portion 142A of the housing 610. The second groove 43B may be disposed adjacent to the upper portion of the inner surface of the side portion 141-1 of the housing 610. For example, the second groove 43B may be formed between the second protrusion 44B and the inner surface of the side portion 141-1 of the housing 610.

[0077] For example, the third protrusion 44C may be provided on the inner surface of the lower portion 142B of the housing 610, and the fourth protrusion 44D may be formed on the inner surface of the upper portion 142A of the housing 610 so as to correspond to, face, or overlap the third protrusion 44C in a third direction (e.g., the X-axis direction). The third protrusion 44C and the fourth protrusion 44D may be provided on the inner surface of the side portion 141-2 of the housing 610 so as to be spaced apart from each other at a predetermined interval.

[0078] For example, the third groove 43C may be formed in the inner surface of the lower portion 142B of the housing 610. The third groove 43C may be disposed adjacent to the lower portion of the inner surface of the side portion 141-2 of the housing 610. For example, the third groove 43C may be formed between the third protrusion 44C and the inner surface of the side portion 141-2 of the housing 610.

[0079] For example, the fourth groove 43D may be formed in the inner surface of the upper portion 142A of the housing 610 .

[0080] For example, the fourth groove 43D may be disposed adjacent to an upper portion of the inner surface of the side portion 141-2 of the housing 610. For example, the fourth groove 43D may be formed between the fourth protrusion 44D and the inner surface of the side portion 141-2 of the housing 610.

[0081] For example, grooves 42A and 42B may be formed in the inner surface of at least one of the side portions 141-1 and 141-2 of the housing 610 so that the rolling members B1 to B8 can be at least partially accommodated or disposed therein. For example, grooves (e.g., 42A and 42B) may be formed in the inner surface of at least one of the side portions 141-1 and 141-2 of the housing 610 adjacent to the first to fourth grooves 43A to 43D. Two grooves (e.g., 42A and 42B) may be formed in the inner surface of at least one of the side portions 141-1 and 141-2 of the housing 610 adjacent to the first to fourth grooves 43A to 43D. Figure 4A However, in another embodiment, the grooves may be formed so as to correspond to the first to fourth grooves 43A to 43D, respectively.

[0082] The support portion 29B of the lens assembly 622 may be disposed in the first groove 43A and the second groove 43B, and the first protrusion 44A and the second protrusion 44B may guide movement of the support portion 29B of the lens assembly 622 .

[0083] In addition, the support portion 39B of the lens assembly 624 may be disposed in the third groove 43C and the fourth groove 43D, and the third protrusion 44C and the fourth protrusion 44D may guide movement of the support portion 39B of the lens assembly 624 .

[0084] The first to fourth protrusions 44A to 44D and the first to fourth grooves 43A to 43D can ensure stable movement of the lens assemblies 622 and 624 and can prevent the support parts 29B and 39B from being separated from the grooves 43A to 43D or colliding with the lens unit 620 due to impact or the like.

[0085] The housing 610 may include an opening 621 formed in an upper portion 142A thereof to expose a portion of the lens unit 620. In addition, the housing 610 may further include a cover 614 to cover the opening 621. For example, the housing 610 may include an opening 622 formed in a lower portion thereof to expose another portion of the lens unit 620. In addition, the housing 610 may further include a cover 615 to cover the opening 622. In another embodiment, at least one of the openings 621 and 622 may not be formed, and the covers 614 and 615 may be omitted.

[0086] For example, the housing 610 can be formed by injection molding. For example, at least one groove 28 can be formed in the outer surface of the upper portion 142A of the housing 610 so as to correspond, face or overlap with the protrusions 44B and 44D. If the thickness of the injection molded product is large, it is difficult to form a product with a desired shape by the injection molding process. For this reason, a groove corresponding to the protrusion is formed. In addition, for example, at least one groove (not shown) can be formed in the outer surface of the lower portion 142B of the housing 610 so as to correspond, face or overlap with the protrusions 44A and 44C.

[0087] The lens unit 620 may include a second lens assembly 622 and a third lens assembly 624 that are spaced apart from each other.

[0088] Reference Figure 5A and Figure 5B , the second lens assembly 622 may include a first lens holder 29. In addition, the second lens assembly 622 may include a second lens array (or second lens group) 49, which is disposed on or coupled to the first lens holder 29. The lens holder may alternatively be referred to as a "bobbin". For example, the second lens array 49 may include a single lens or a plurality of lenses.

[0089] For example, the first lens holder 29 may include a first lens barrel 29A formed so that the second lens array 49 can be disposed thereon or coupled thereto. For example, the first lens barrel 29A may be moved in a first direction by interaction between the first magnet 130A and the first coil 120A.

[0090] In addition, the first lens holder 29 may include a first support portion 29B, which is connected or coupled to the first lens barrel 29A. For example, the first lens barrel 29A may have a barrel shape and may include an opening (or hole) 29C, and the second lens array 49 is coupled thereto through the opening (or hole) 29C.

[0091] The first side surface (or first surface) of the first support portion 29B may be connected or coupled to the first lens barrel 29A. The first support portion 29B may correspond to, face, or overlap the side portion 141-1 of the housing 610 in the second direction (e.g., the Y-axis direction). For example, the first support portion 29B may protrude from the front surface of the first lens barrel 29A in the first direction.

[0092] The first support portion 29B may include at least one first groove (or first guide groove) 13A and 13B to accommodate at least a portion of each of the rolling members B1 to B4. For example, at least one first groove 13A and 13B may be formed in the second side surface (or second surface) of the first support portion 29B. For example, the second side surface (or second surface) of the first support portion 29B may be a surface opposite to the first side surface (or first surface) of the first support portion 29B.

[0093] For example, at least one first groove 13A and 13B in the first supporting portion 29B may correspond to, face, or overlap with the side portion 141-1 of the housing 610. For example, at least one first groove 13A in the first supporting portion 29B may correspond to, face, or overlap with the groove 42A formed in the side portion 141-1 of the housing 610.

[0094] For example, at least one groove 13A may be formed at a lower side of the second side surface of the first supporting portion 29B, and at least one groove 13B may be formed at an upper side of the second side surface of the second supporting portion 29B.

[0095] The third lens assembly 624 may include a second lens holder 39. In addition, the third lens assembly 624 may include a third lens array (or a third lens group) 59, which is disposed on or coupled to the second lens holder 39. For example, the third lens array 59 may include a single lens or a plurality of lenses.

[0096] For example, the second lens holder 39 may include a second lens barrel 39A, which is formed so that the third lens array 59 can be disposed thereon or coupled thereto. For example, the second lens barrel 39A may be moved in the first direction by the interaction between the second magnet 130B and the second coil 120B.

[0097] In addition, the second lens holder 39 may include a second support portion 39B connected or coupled to the second lens barrel 39A. For example, the second lens barrel 39A may have a barrel shape and may include an opening (or hole) 39C, and the third lens array 59 is coupled thereto through the opening (or hole) 39C.

[0098] The first side surface (or first surface) of the second support portion 39B can be connected or coupled to the second lens barrel 39A. The second support portion 39B can correspond to, face or overlap with the side portion 141-2 of the housing 610 in a second direction (e.g., Y-axis direction). For example, the second support portion 39B can protrude from the rear surface of the second lens barrel 39A in the first direction. For example, the second support portion 39B can protrude in a direction opposite to the direction in which the first support portion 29B protrudes.

[0099] The second support portion 39B may include at least one second groove (or second guide groove) 13C and 13D to accommodate at least a portion of each of the rolling members B5 to B8. For example, at least one second groove 13C and 13D may be formed in the second side surface (or second surface) of the second support portion 39B. For example, the second side surface (or second surface) of the second support portion 39B may be a surface opposite to the first side surface (or first surface) of the second support portion 39B.

[0100] For example, at least one second groove 13C and 13D in the second supporting portion 39B may correspond to, face, or overlap with the side portion 141-2 of the housing 610. For example, at least one second groove 13D in the second supporting portion 39B may correspond to, face, or overlap with the groove 42B formed in the side portion 141-2 of the housing 610.

[0101] For example, at least one groove 13C may be formed at a lower side of the second side surface of the second supporting portion 39B, and at least one groove 13D may be formed at an upper side of the second side surface of the second supporting portion 39B.

[0102] The plurality of lenses included in each of the second lens array 49 and the third lens array 59 may be sequentially disposed or arranged in the first direction. For example, each of the second lens array 49 and the third lens array 59 may include various types of optical lenses. For example, each of the second lens array 49 and the third lens array 59 may include at least one of a front lens having positive power or a rear lens having negative power.

[0103] The distance between the second lens assembly 622 and the third lens assembly 624 in the optical axis direction may be changed by a driver 630 .

[0104] Each of the grooves 42A and 42B in the housing 610 and the grooves 13A to 13D in the first and second bearing portions may be formed so as to contact a corresponding one of the rolling members B1 to B8 at two or more points. For example, each of the grooves 42A and 42B in the housing 610 and the grooves 13A to 13D in the first and second bearing portions may have a polygonal (e.g., quadrilateral) shape, a V-shape, or a U-shape.

[0105] When the second lens assembly 622 and the third lens assembly 624 are moved, the occurrence of decentering or tilting thereof can be prevented by the protrusions 44A to 44D of the housing 610 and the grooves 42A and 42B in the housing 610 and / or by the grooves 13A or 13D in the first support portion 29B and the second support portion 39B. Therefore, the alignment between the plurality of lens arrays 49 and 59 can be properly maintained, thereby preventing the occurrence of changes in the field of view or defocusing. Therefore, the image quality or resolution of the camera device 100 can be greatly improved.

[0106] The actuator 100 may include rolling members B1 to B8 disposed between the housing 610 and the lens unit 620. The rolling members B1 to B8 may be in contact with the housing 610 and the lens unit 620. For example, the rolling members B1 to B8 may be disposed between the side portions 141-1 and 141-2 of the housing 610 and the support portions 29B and 39B of the lens unit 620. The rolling members B1 to B8 may be in contact with the side portions 141-1 and 141-2 of the housing 610 and the support portions 29B and 39B of the lens unit 620.

[0107] For example, rolling members B1 to B8 may be disposed between inner surfaces (or grooves 42A and 42B) of side portions 141-1 and 141-2 of housing 610 and grooves 13A to 13D in support portions 29B and 39B. Rolling members B1 to B8 may contact inner surfaces (or grooves 42A and 42B) of side portions 141-1 and 141-2 of housing 610 and grooves 13A to 13D in support portions 29B and 39B.

[0108] The rolling members B1 to B8 may alternatively be referred to as "ball members", "balls" or "ball bearings". For example, the rolling members B1 to B8 may include at least one ball. Each of the balls B1 to B8 may have a circular shape and may have a diameter sufficient to support the movement of the lens unit 620. In another embodiment, the rolling members may have a roller shape. For example, the rolling members B1 to B8 may be made of metal, plastic or resin.

[0109] The rolling members B1 to B8 may support the lens unit 620. When the lens unit 620 moves in the first direction, the rolling members B1 to B8 may roll between the lens unit 620 and the housing 610, thereby reducing friction between the lens unit 620 and the housing 610. That is, due to the rolling motion of the rolling members B1 to B8, the lens unit 620 may move in the first direction in a sliding manner along the guide portion 43 of the housing 610 in a state of contacting the rolling members B1 to B8.

[0110] For example, the rolling members may include first rolling members B1 to B4 and second rolling members B5 to B8. The first rolling members B1 to B4 may be disposed between the guide portion 43 of the housing 610 and the second lens assembly 622 (e.g., the first support portion 29B). The second rolling members B5 to B8 may be disposed between the guide portion 43 of the housing 610 and the third lens assembly 624 (e.g., the second support portion 39B).

[0111] Next, the driver 630 will be described.

[0112] The driver 630 can move the second lens assembly 622 in the first direction and can move the third lens assembly 624 in the first direction. For example, the driver 630 can move at least one lens group, such as the second lens group or the third lens group, in the first direction or the optical axis direction.

[0113] The driver 630 may include a magnet 130 disposed on the lens unit 620 and a coil 120 disposed in the housing 610. In another embodiment, the magnet may be disposed in the housing, and the coil may be disposed on the lens unit.

[0114] The coil 120 may include a first coil 120A disposed on the first side portion 141 - 1 of the housing 610 and a second coil 120B disposed on the second side portion 141 - 2 of the housing 610 .

[0115] The first coil 120A may include a plurality of coil units. For example, the plurality of coil units of the first coil 120A may be sequentially arranged or arranged in the first direction. For example, the plurality of coil units of the first coil 120A may be arranged or arranged to be spaced apart from each other at regular intervals. In another embodiment, the plurality of coil units of the first coil may be sequentially or continuously arranged or arranged to contact each other.

[0116] like Figure 5A and Figure 5B As shown in , the first coil 120A may include six coil units 31 to 36. In another embodiment, the first coil 120A may include three coil units 31 to 33. In yet another embodiment, the first coil may include four or more coil units.

[0117] The second coil 120B may include a plurality of coil units. For example, the plurality of coil units of the second coil 120B may be sequentially arranged or arranged in the first direction. For example, the plurality of coil units of the second coil 120B may be arranged or arranged to be spaced apart from each other at regular intervals. In another embodiment, the plurality of coil units of the second coil may be sequentially or continuously arranged or arranged to contact each other.

[0118] like Figure 5A and Figure 5B As shown in , the second coil 120B may include six coil units 41 to 46. In another embodiment, the second coil 120B may include three coil units 41 to 43. In yet another embodiment, the second coil may include four or more coil units.

[0119] For example, refer to Fig. 6A, each of the coil units of the first coil 120A and the second coil 120B may have a closed curve or annular shape in which a cavity (or hole) 201 is formed. For example, each of the coil units of the first coil 120A and the second coil 120B may be formed in the shape of a coil ring that is wound in a clockwise or counterclockwise direction relative to (or around) a third axis parallel to the second direction (e.g., the Y-axis direction). For example, the cavity or hole in each of the coil units of the first coil 120A may face the first magnet 130A in the second direction (e.g., the Y-axis direction). In addition, for example, the cavity or hole in each of the coil units of the second coil 120B may face the second magnet 130B in the second direction (e.g., the Y-axis direction).

[0120] A first drive signal (eg, a first current or a first voltage) may be applied to the first coil 120A, and a second drive signal (eg, a second current or a second voltage) may be applied to the second coil 120B.

[0121] The magnet 130 may include a first magnet 130A disposed on or coupled to the second lens assembly 622 and a second magnet 130B disposed on or coupled to the third lens assembly 624 .

[0122] For example, the first magnet 130A can be set on the first lens holder 29 of the second lens assembly 622 or coupled to the first lens holder 29 of the second lens assembly 622, and the second magnet 130B can be set on the second lens holder 39 of the third lens assembly 624 or coupled to the second lens holder 39 of the third lens assembly 624.

[0123] For example, the first magnet 130A may be disposed on or coupled to the first support portion 29B of the first lens holder 29. The second magnet 130B may be disposed on or coupled to the second support portion 39B of the second lens holder 39.

[0124] For example, each of the first magnet 130A and the second magnet 130B may be a dipole magnet including two N poles and two S poles. In another embodiment, each of the first magnet and the second magnet may be a monopole magnet including one N pole and one S pole.

[0125] For example, the first magnet 130A may correspond to, face, or overlap at least three of the coil units of the first coil 120A in the second direction (e.g., the Y-axis direction). In addition, for example, the second magnet 130B may correspond to, face, or overlap at least three of the coil units of the second coil 120B in the second direction (e.g., the Y-axis direction).

[0126] The second lens assembly 622 can be moved in the first direction by the electromagnetic force generated by the interaction between the first coil 120A and the first magnet 130A. In addition, the third lens assembly 624 can be moved in the first direction by the electromagnetic force generated by the interaction between the second coil 120B and the second magnet 130B.

[0127] The movement of each of the second lens assembly 622 and the third lens assembly 624 can be controlled by controlling the first driving signal and the second driving signal. When the movement of each of the second lens assembly 622 and the third lens assembly 624 is controlled, the position (or displacement) of each of the second lens assembly 622 and the third lens assembly 624 can be controlled, so that the zoom function and the auto focus function of the camera device 200 can be performed.

[0128] The driver 630 may further include a first yoke 19A provided on the first lens holder 29 and a second yoke 19B provided on the second lens holder 39. The first yoke 19A may increase the electromagnetic force generated by the interaction between the first magnet 130A and the first coil 120A, and the second yoke 19B may increase the electromagnetic force generated by the interaction between the second magnet 130B and the second coil 120B. Since the driving force for the movement of the lens unit 620 may be increased by the first yoke 19A and the second yoke 19B, the amount of power consumed for the auto focus or zoom function may be reduced.

[0129] For example, the first yoke 19A may be provided between the first magnet 130A and the first lens holder 29, and the second yoke 19B may be provided between the second magnet 130B and the second lens holder 39. For example, the first yoke 19A may be provided on the first supporting portion 29B, and the second yoke 19B may be provided on the second supporting portion 39B.

[0130] For example, the first yoke 19A may include a main body (or a first part) and an extension part (or a second part), wherein the main body faces the first magnet 130A in a second direction (for example, the Y-axis direction) and is coupled to the first lens holder 29, and the extension part extends from the main body and is disposed on one or more surfaces of the first magnet 130A.

[0131] The driver 630 may include a circuit board (or board) 190 conductively connected to the coil 120. For example, the circuit board 190 may be a printed circuit board.

[0132] The circuit board 190 may be disposed in the housing 610. The circuit board 190 may include a first board 192 disposed on or coupled to the first side portion 141-1 of the housing 610, and a second board 194 disposed on or coupled to the second side portion 141-2 of the housing 610.

[0133] The first coil 120A may be disposed or mounted on a first surface of the first plate 192. In this case, the first surface of the first plate 192 may be a surface facing the first side portion 141-1 of the housing 610 in the second direction (e.g., the Y-axis direction). The second coil 120B may be disposed or mounted on a first surface of the second plate 194. In this case, the first surface of the second plate 194 may be a surface facing the second side portion 141-2 of the housing 610 in the second direction (e.g., the Y-axis direction).

[0134] The first plate 192 may be conductively connected to the first coil 120A. In addition, the first plate 192 may include a plurality of terminals (not shown). For example, the plurality of terminals of the first plate 192 may be formed on a second surface of the first plate 192. For example, the second surface of the first plate 192 may be a surface opposite to the first surface of the first plate 192.

[0135] The second plate 194 may be conductively connected to the second coil 120B. For example, the second plate 194 may include a plurality of terminals (not shown). For example, the plurality of terminals of the second plate 194 may be formed on a second surface of the second plate 194. For example, the second surface of the second plate 194 may be a surface opposite to the first surface of the second plate 194.

[0136] The driver 630 may further include a third yoke 48 disposed on the second surface of the first plate 192 (see Figure 5A ) and a fourth yoke 49 disposed on the second surface of the second plate 194. The fourth yoke may have the same shape as the third yoke. The third yoke 48 and the fourth yoke 49 may increase the electromagnetic force generated by the interaction between the magnet 130 and the coil 120.

[0137] The driver 630 may include the position sensor 170 in order to perform feedback driving for precise zoom and AF operations.

[0138] The position sensor 170 may include a first position sensor 170A configured to detect a position or displacement of the second lens assembly 622 and a second position sensor 170B configured to detect a position or displacement of the third lens assembly 624 .

[0139] For example, the first position sensor 170A may be disposed or mounted on the first board 192 and may be conductively connected to the first board 192. The second position sensor 170B may be disposed or mounted on the second board 194 and may be conductively connected to the second board 194.

[0140] For example, the first position sensor 170A can be set on the first surface of the first plate 192, coupled to the first surface of the first plate 192, or installed on the first surface of the first plate 192, and the second position sensor 170B can be set on the first surface of the second plate 194, coupled to the first surface of the second plate 194, or installed on the first surface of the second plate 194.

[0141] The first position sensor 170A may include a first sensor 71A and a second sensor 71B. For example, the first sensor 71A and the second sensor 71B may be arranged to be spaced apart from each other in the first direction. For example, the first sensor 71A may be disposed in a cavity in one coil unit (e.g., 31) among the first coil unit 31 to the third coil unit 33. For example, the second sensor 71B may be disposed in a cavity in another coil unit (e.g., 33) among the first coil unit 31 to the third coil unit 33. In another embodiment, each of the two sensors 71A and 71B may be disposed in a corresponding one of two adjacent coil units among the first coil unit 31 to the third coil unit 33.

[0142] In addition, the first position sensor 170A may include a third sensor 71C and a fourth sensor 71D. For example, the third sensor 71C and the fourth sensor 71D may be arranged to be spaced apart from each other in the first direction. For example, the third sensor 71C may be disposed in a cavity in one coil unit (e.g., 34) of the fourth coil unit 34 to the sixth coil unit 36. For example, the fourth sensor 71D may be disposed in a cavity in another coil unit (e.g., 36) of the fourth coil unit 34 to the sixth coil unit 36. In another embodiment, each of the two sensors 71C and 71D may be disposed in a corresponding one of two adjacent coil units in the fourth coil unit 34 to the sixth coil unit 36.

[0143] The second position sensor 170B may include a first sensor 72A and a second sensor 72B. For example, the first sensor 72A and the second sensor 72B may be arranged to be spaced apart from each other in the first direction. For example, the first sensor 72A may be disposed in a cavity in one coil unit (e.g., 41) of the first coil unit 41 to the third coil unit 43. For example, the second sensor 72B may be disposed in a cavity in another coil unit (e.g., 43) of the first coil unit 41 to the third coil unit 43. In another embodiment, each of the two sensors 72A and 72B may be disposed in a corresponding one of two adjacent coil units in the first coil unit 41 to the third coil unit 43.

[0144] In addition, the second position sensor 170B may include a third sensor 72C and a fourth sensor 72D. For example, the third sensor 72C and the fourth sensor 72D may be arranged to be spaced apart from each other in the first direction. For example, the third sensor 72C may be disposed in a cavity in one coil unit (e.g., 44) of the fourth coil unit 44 to the sixth coil unit 46. For example, the fourth sensor 72D may be disposed in a cavity in another coil unit (e.g., 46) of the fourth coil unit 44 to the sixth coil unit 46. In another embodiment, each of the two sensors 72C and 72D may be disposed in a corresponding one of two adjacent coil units in the fourth coil unit 44 to the sixth coil unit 46.

[0145] For example, each of the first sensor 71A to the fourth sensor 71D of the first position sensor 170A may be a Hall sensor or a tunnel magnetoresistance (TMR) sensor. In addition, each of the first sensor 72A to the fourth sensor 72D of the second position sensor 170B may be a Hall sensor or a TMR sensor. For example, the TMR sensor may be a TMR linear magnetic field sensor.

[0146] In another embodiment, at least one of the first to fourth sensors may be a driver IC including a Hall sensor.

[0147] For example, each of the first to fourth sensors 71A to 71D may include two input terminals to which a driving signal (or a driving current) is supplied and two output terminals for outputting an output signal (eg, an output voltage).

[0148] For example, two output terminals of the first sensor 71A and two input terminals of the second sensor 71B may be connected in parallel with each other. In addition, for example, two output terminals of the third sensor 71C and two input terminals of the fourth sensor 71D may be connected in parallel with each other.

[0149] For example, the output terminals of the first sensor 71A and the second sensor 71B connected in parallel and the output terminals of the third sensor 71C and the fourth sensor 71D connected in parallel may be connected in series with each other. That is, the output voltages of the first sensor 71A and the second sensor 71B connected in parallel may be added to the output voltages of the third sensor 71C and the fourth sensor 71D connected in parallel. The sum of the output voltages (or the final output voltage) may be used to detect the displacement or position of the first magnet 130A or the second lens assembly 622.

[0150] In another embodiment, each of the first to fourth sensors 71A to 71D can output an output signal (or output voltage), and one or more of the output signals output from the first to fourth sensors 71A to 71D can be used to detect the displacement or position of the first magnet 130A or the second lens assembly 622.

[0151] The description of the output signals from the first to fourth sensors 71A to 71D and the connection relationship between their output terminals may be equally or similarly applied to the first to fourth sensors 72A to 72D of the second position sensor 170B.

[0152] For example, within the travel range of the second lens assembly 622 (or the first lens holder 29) in the first direction, the first position sensor 170A may face or overlap the first magnet 130A in the second direction (eg, the Y-axis direction).

[0153] For example, within the travel range of the third lens assembly 624 (or the second lens holder 39) in the first direction, the second position sensor 170B can face the second magnet 130B or overlap with the second magnet 130B in the second direction (eg, the Y-axis direction).

[0154] The first position sensor 170A can detect the magnetic field strength of the first magnet 130A. For example, the first position sensor 170A can detect the movement of the first magnet 130A (or the second lens assembly 622) in the optical axis direction. For example, the final output voltage of the first position sensor 170A can be used to detect the displacement or position of the first magnet 130A or the second lens assembly 622. Alternatively, the displacement or position of the first magnet 130A or the second lens assembly 622 can be detected using one or more of the output signals output from the first sensor 71A to the fourth sensor 71D.

[0155] The second position sensor 170B can detect the magnetic field strength of the second magnet 130B. For example, the second position sensor 170B can detect the movement of the second magnet 130B (or the third lens assembly 624) in the optical axis direction. For example, the final output voltage of the second position sensor 170B can be used to detect the displacement or position of the second magnet 130B or the third lens assembly 624. Alternatively, the displacement or position of the second magnet 130B or the third lens assembly 624 can be detected using one or more of the output signals output from the first sensor 72A to the fourth sensor 72D.

[0156] like Figure 5A and Figure 5B As shown in FIG. 1 , each of the first position sensor 170A and the second position sensor 170B includes four sensors. However, in another embodiment, each of the first position sensor and the second position sensor may include one or more sensors.

[0157] Fig. 6A 1 is a plan view of the coil units 31 to 33 of the first coil 120A and the position sensors 71 (71A to 71D, Figure 6B is a schematic cross-sectional view of the first magnet 130A and the coil units 31 to 36 of the first coil 120A, Figure 7 1 shows the driving signals supplied to the coil units 31 to 33 of the first coil 120A, Figure 8 1 to 3 are shown the first to third driving signals supplied to the first to third coil units 31 to 33, Fig. 9 1 and 2 show electromagnetic forces between the first to third coil units 31 to 33 and the first magnet 130A, the first to third driving signals are supplied to the first to third coil units 31 to 33, and Fig.10 Magnetic forces generated from the first to sixth coil units 31 to 36 and magnetic forces generated from the first magnet 130A are shown, and the first to third driving signals are supplied to the first to sixth coil units 31 to 36 .

[0158] Reference Fig. 6A and Figure 6B , the first magnet 130A may be a bipolar magnetized magnet or a 4-pole magnet including two N poles and two S poles. For example, the first magnet 130A may include a first magnet portion 401, a second magnet portion 402, and a partition wall 403 disposed between the first magnet portion 401 and the second magnet portion 402. Here, the magnet portion may alternatively be referred to as a "magnet unit", and the partition wall 403 may alternatively be referred to as a "non-magnetic partition wall".

[0159] The first magnet portion 401 may include a first polarity region 41A and a second polarity region 41B. For example, the first polarity region 41A may be an S pole (or an N pole), and the second polarity region 41B may be an N pole (or an S pole). In addition, the first magnet portion 401 may include a first interface portion between the first polarity region 41A and the second polarity region 41B. The first interface portion may be a portion that is substantially non-magnetic and includes a region that has almost no polarity, and may be a portion that is naturally generated to form a magnet including one N pole and one S pole.

[0160] The second magnet portion 402 may include a third polarity region 42A and a fourth polarity region 42B. For example, the third polarity region 42A may be an N pole (or an S pole), and the fourth polarity region 42B may be an S pole (or an N pole). In addition, the second magnet portion 402 may include a second interface portion between the third polarity region 42A and the fourth polarity region 42B. The second interface portion may be a portion that is substantially non-magnetic and includes an area that has almost no polarity, and may be a portion that is naturally generated to form a magnet including one N pole and one S pole.

[0161] The partition wall 403 may be a portion that separates or isolates the first magnet portion 401 and the second magnet portion 402 from each other and has substantially no magnetism or almost no polarity. For example, the partition wall may be implemented as a non-magnetic material, a gap, or air. For example, the partition wall may be referred to as a "neutral region" or a "neutral section."

[0162] The partition wall 403 may be a portion artificially formed when the first magnet portion 401 and the second magnet portion 402 are magnetized. The width of the partition wall 403 may be greater than the width of the first interface portion (or the width of the second interface portion). Here, the width of the partition wall 403 may be its length in the direction from the first magnet portion 401 toward the second magnet portion 402. The width of the first interface portion (or the second interface portion) may be the length of the first interface portion in the direction from the N pole of each of the first magnet portion 401 and the second magnet portion 402 toward the S pole.

[0163] The first magnet portion 401 and the second magnet portion 402 may be arranged in the first direction with the partition wall 403 interposed therebetween. For example, the first magnet portion 401 and the second magnet portion 402 may be arranged to face each other in the first direction with the partition wall 403 interposed therebetween.

[0164] The first magnet portion 401 and the second magnet portion 402 can be arranged such that their opposite polarities face each other in the optical axis direction. For example, the first magnet portion 401 and the second magnet portion 402 can be arranged to face or overlap each other in the optical axis direction. Additionally, for example, the N pole and the S pole of each of the first magnet portion 401 and the second magnet portion 402 can be arranged to face or overlap each other in the second direction (e.g., the Y-axis direction).

[0165] For example, the N pole of the first magnet portion 401 can be arranged to be closer to the coil units 31 to 36 of the first coil 120A than the S pole of the first magnet portion 401, and the S pole of the second magnet portion 402 can be arranged to be closer to the coil units 31 to 36 of the first coil 120A than the N pole of the second magnet portion 402. However, in another embodiment, the positions of the N pole and the S pole can be interchanged.

[0166] In another embodiment, the first magnet portion and the second magnet portion of the first magnet can be arranged to face each other in the second direction (e.g., the Y-axis direction) or the third direction (e.g., the X-axis direction).

[0167] In another embodiment, the first magnet can be a two-pole magnet including one N pole and one S pole. For example, one N pole and one S pole of the first magnet can be arranged to face each other in the optical axis direction. In yet another embodiment, one N pole and one S pole of the first magnet can be arranged to face each other in the second direction (e.g., the Y-axis direction).

[0168] The description of the first magnet 130A can be applied equally or similarly to the second magnet 130B.

[0169] The first magnet 130A can overlap three adjacent coil units among the coil units 31 to 36 of the first coil 120A in the second direction (e.g., the Y-axis direction).

[0170] For example, the length L11 of the first magnet 130A in the first direction can be less than the total length L4 of three adjacent coil units (e.g., 31 to 33) in the first direction (L11 < L4). For example, the total length L4 can be a value obtained by adding the individual lengths L21, L22, and L23 of the three adjacent coil units in the optical axis direction and the spacing distance d1 between the coil units.

[0171] For example, "L11" can be less than the sum of the individual lengths of three adjacent coil units (e.g., 31 to 33) in the first direction.

[0172] For example, the length L11 of the first magnet 130A in the first direction may be greater than the total length in the first direction of two adjacent coil units among the plurality of coil units 31 to 36 (e.g., 31 and 32). For example, the total length in the first direction of two adjacent coil units (e.g., 31 and 32) may be a value obtained by adding the individual lengths of the two adjacent coil units in the optical axis direction and the spacing distance between the adjacent coil units. For example, "L11" may be greater than the sum of the individual lengths of two adjacent coil units (e.g., 31 and 32) in the first direction.

[0173] In another embodiment, the length L11 of the first magnet 130A in the first direction may be equal to the total length L4 in the first direction of three adjacent coil units (e.g., 31 to 33).

[0174] For example, the length L11 of the first magnet 130A in the first direction may be less than the value obtained by adding the individual lengths of three adjacent coil units in the first direction (e.g., L21, L22, and L23). In another embodiment, the length L11 of the first magnet 130A in the first direction may be equal to the value obtained by adding the individual lengths of three adjacent coil units in the first direction (e.g., L21, L22, and L23).

[0175] The length L11 of the first magnet 130A in the first direction may be greater than the sum of the individual lengths of two of the three adjacent coil units in the first direction.

[0176] For example, the length L11 of the first magnet 130A in the first direction may be greater than the length L12 of the first magnet 130A in the third direction (e.g., the X-axis direction) (L11 > L12).

[0177] For example, the length L12 of the first magnet 130A in the third direction (e.g., the X-axis direction) may be less than the length L31 of the coil unit of the first coil 120A in the third direction (e.g., the X-axis direction) (L12 < L31). In another embodiment, the length L12 of the first magnet 130A in the third direction (e.g., the X-axis direction) may be equal to or greater than the length L31 of the coil unit of the first coil 120A in the third direction (e.g., the X-axis direction).

[0178] For example, the coil units 31 to 36 of the first coil 120A may have the same shape. In addition, for example, the coil units 31 to 36 of the first coil 120A may have the same number of windings (or turns). For example, the individual lengths L21, L22, and L23 of the coil units 31 to 36 of the first coil 120A in the first direction may be the same. In addition, for example, the length H2 of the coil units 31 to 33 of the first coil 120A in the second direction (e.g., Y-axis direction) may be the same. In another embodiment, the number of turns, the length in the first direction, or the length in the second direction of at least one coil unit of the coil units of the first coil may be different from the number of turns, the length in the first direction, or the length in the second direction of other coil units of the first coil.

[0179] For example, the length L31 of each coil unit in the coil units of the first coil 120A in the third direction (e.g., the X-axis direction) may be greater than its length L21 in the first direction (L31>L21). In another embodiment, the length of each coil unit in the coil units in the third direction (e.g., the X-axis direction) may be equal to or less than its length in the first direction.

[0180] For example, a length L2 of a polarity region of the first magnet 130A in the first direction may be greater than a length L21, L22 or L23 (L2>L21, L2>L22 or L2>L23) of a coil unit (e.g., 31) of the first coil 120A in the first direction.

[0181] For example, the length L2 of the first magnet portion 401 in the first direction may be greater than the length L21, L22, or L23 of the coil unit (e.g., 31) of the first coil 120A in the first direction. For example, the length L2 of the first magnet portion 401 in the first direction may be greater than the length L21, L22, or L23 of each of the coil units (e.g., 31 to 36) of the first coil 120A in the first direction.

[0182] In addition, for example, the length L2 of the second magnet portion 402 in the first direction may be greater than the length L21, L22, or L23 of the coil unit (e.g., 31) of the first coil 120A in the first direction. For example, the length L2 of the second magnet portion 402 in the first direction may be greater than the length L21, L22, or L23 of each of the coil units (e.g., 31 to 36) of the first coil 120A in the first direction.

[0183] For example, the length H1 of the first magnet 130A in the second direction (e.g., the Y-axis direction) can be less than the length H2 of the coil unit of the first coil 120A in the second direction (H1 < H2). In another embodiment, the length H1 of the first magnet 130A in the second direction (e.g., the Y-axis direction) can be equal to or greater than the length H2 of the coil unit of the first coil 120A in the second direction (e.g., the Y-axis direction).

[0184] For example, the length L3 of the partition wall 403 of the first magnet 130A in the first direction can be less than the length L5 of the cavity 201 in the coil unit of the first coil 120A in the first direction. In another embodiment, the length L3 of the partition wall 403 in the first direction can be equal to or greater than the length L5 of the cavity 201 in the coil unit of the first coil 120A in the first direction.

[0185] For example, the length L3 of the partition wall 403 in the first direction can be greater than the spacing distance d1 between two adjacent coil units. In another embodiment, the length L3 of the partition wall 403 in the first direction can be equal to or less than the spacing distance d1 between two adjacent coil units.

[0186] For example, the first spacing P1 between the first magnet portion 401 and the second magnet portion 402 can be greater than the second spacing P2 between two adjacent coil units (P1 > P2). For example, the first spacing P1 can be the distance between the center of the first magnet portion 401 and the center of the second magnet portion 402. Additionally, the second spacing P2 can be the distance between the center of the cavity 201 in one coil unit of two adjacent coil units and the center of the cavity 210 in the other coil unit of two adjacent coil units. In another embodiment, the first spacing can be equal to or less than the second spacing.

[0187] For example, referring to Fig. 6A and Figure 6B , the sensors 71A and 71B of the first position sensor 170A can be disposed in the cavities of the first coil unit 31 and the third coil unit 33 among three adjacent coil units 31 to 33.

[0188] Referring to Figure 6B, the range in which the first magnet 130A and the coil units 31 to 36 can overlap each other in the second direction (e.g., the Y-axis direction) can be set to the travel range 801 of the first magnet 130A. In the case where the sensor is arranged in the cavity in the second coil unit 32, in the case where the first magnet 130A is positioned close to one side of the travel range, the sensor overlaps with the partition wall 403 of the first magnet 130A in the second direction (e.g., the Y-axis direction), which may degrade the linearity of the output of the sensor, thereby degrading the position detection performance of the first position sensor. This problem may also occur when the first magnet 130A is positioned close to the other side of the travel range. For this reason, sensors 71C and 71D can be arranged in the cavities in the fourth coil unit 34 and the sixth coil unit 36 ​​among the multiple coil units 31 to 36.

[0189] For example, the distance D11 between the first sensor 71A and the second sensor 71B in the first direction may be different from the distance D12 between the second sensor 71B and the third sensor 71C in the first direction.

[0190] For example, "D11" may be greater than "D12". Each of "D11" and "D12" may be the spacing distance between the two sensors or the distance between the centers of the two sensors. Since "D12" is set to be smaller than "D11", in the case where the first magnet 130A is positioned near one end of a series of six coil units, the second sensor 71B may be positioned near the center of the first magnet portion 401 of the first magnet 130A. Therefore, the sensitivity of the second sensor 71B may be improved, and the linearity of the output of the second sensor 71B may be improved.

[0191] Reference Fig. 6A , each of the coil units 31 to 36 may include a first straight portion 3a, a second straight portion 3b, a first curved portion 3c, and a second curved portion 3d. For example, the first straight portion 3a and the second straight portion 3b may face each other or may be positioned relative to each other in a first direction (e.g., Z-axis direction). For example, the first curved portion 3c and the second curved portion 3d may face each other or may be positioned relative to each other in a third direction (e.g., X-axis direction).

[0192] For example, the first curved portion 3c may interconnect one side of the first straight portion 3a with one side of the second straight portion 3b, and the second curved portion 3d may interconnect the other side of the first straight portion 3a with the other side of the second straight portion 3b.

[0193] Reference Figure 6B, for example, the first sensor 71A may be disposed close to the second coil unit 32, or disposed on the right side relative to the center or central axis of the cavity 201 in the first coil unit 31. For example, the first sensor 71A may be positioned closer to the first straight line portion 3a of the first coil unit 31 than the second straight line portion 3b of the first coil unit 31. For example, the second coil unit 32 may be positioned closer to the first straight line portion 3a of the first coil unit 31 than the second straight line portion 3b of the first coil unit 31.

[0194] For example, the second sensor 71B may be disposed close to the second coil unit 32 relative to the center of the cavity 201 in the third coil unit 33. For example, the second sensor 71B may be disposed closer to the second coil unit 32 than the fourth coil unit 34.

[0195] For example, the second sensor 71B may be positioned closer to the second straight portion 3b of the third coil unit 33 than the first straight portion 3a of the third coil unit 33. For example, the second coil unit 32 may be positioned closer to the second straight portion 3b of the third coil unit 33 than the first straight portion 3a of the third coil unit 33.

[0196] For example, the third sensor 71C may be disposed close to the fifth coil unit 35 with respect to the center of the cavity 201 in the fourth coil unit 34. For example, the third sensor 71C may be disposed closer to the fifth coil unit 35 than the third coil unit 33.

[0197] For example, the third sensor 71C may be positioned closer to the first straight line portion 3a of the fourth coil unit 34 than the second straight line portion 3b of the fourth coil unit 34. For example, the fifth coil unit 35 may be positioned closer to the first straight line portion 3a of the fourth coil unit 34 than the second straight line portion 3b of the fourth coil unit 34.

[0198] For example, the fourth sensor 71D may be disposed near the fifth coil unit 35 relative to the center of the cavity 201 in the sixth coil unit 36. For example, the fourth sensor 71D may be positioned closer to the second straight line portion 3b of the sixth coil unit 36 ​​than the first straight line portion 3a of the sixth coil unit 36. For example, the fifth coil unit 35 may be positioned closer to the second straight line portion 3b of the sixth coil unit 36 ​​than the first straight line portion 3a of the sixth coil unit 36.

[0199] For example, the distance between the third sensor 71C and the fourth sensor 71D in the first direction may be equal to the distance D11 between the first sensor 71A and the second sensor 71B in the first direction.

[0200] In another embodiment, each of the first to fourth sensors 71A to 71D may be disposed at the center or middle of the cavity 201 in a corresponding coil unit among the coil units 31 to 36 .

[0201] A camera device according to another embodiment may include a sensor disposed in a cavity in each of the six coils.

[0202] like Fig. 6A and Figure 6B As shown in , the sensor is disposed in the cavity in the corresponding coil unit. However, in another embodiment, the sensor may be disposed outside the cavity in the corresponding coil unit. Even if the sensor is disposed outside the cavity in the corresponding coil unit, at least a portion of the sensor may overlap with at least a portion of the first magnet 130A in the second direction (e.g., the Y-axis direction) within the travel range of the first magnet 130A in the first direction.

[0203] Reference Figure 7 and Figure 8 , the first drive signal I1 can be supplied to any one (e.g., 31) of the three adjacent coil units (e.g., 31 to 33) of the first coil 120A, the second drive signal I2 can be supplied to another (e.g., 32) of the three adjacent coil units (e.g., 31 to 33) of the first coil 120A, and the third drive signal I3 can be supplied to the remaining coil unit 33 of the three adjacent coil units (e.g., 31 to 33) of the first coil 120A.

[0204] The first to third driving signals I1 to I3 may be signals having different phases.

[0205] For example, AC signals having different phases may be supplied to the first to third coil units 31 to 33, respectively. For example, alternating currents having a phase difference of 120 degrees from each other may be supplied to the first to third coil units 31 to 33, respectively.

[0206] The first drive signal I1 to the third drive signal I3 may be signals having a predetermined phase difference with each other. For example, the predetermined phase difference may be 120 degrees. For example, the first drive signal may be a U-phase drive current, the second drive signal may be a V-phase drive current, and the third drive signal may be a W-phase drive current.

[0207] For example, a three-phase drive signal can be supplied to three adjacent coil units (e.g., 31 to 33). For example, the drive signal can be an alternating current. In another embodiment, the drive signal can be an alternating voltage. For example, the first to third drive signals can be three-phase sinusoidal signals. For example, the sinusoidal signal can be a sine wave signal or a cosine wave signal.

[0208] In another embodiment, the first to third drive signals may be pulse width modulation (PWM) signals. Alternatively, for example, each of the first to third drive signals may be a sinusoidal PWM signal.

[0209] Reference Fig. 6A and Fig. 9 For example, the direction of the current of the driving signals I1 to I3 flowing through the first coil unit 31 to the third coil unit 33 can be clockwise (or counterclockwise) in a segment with a positive (+) current value, and can be counterclockwise (or clockwise) in a segment with a negative (-) current value.

[0210] In addition, the fourth drive signal I4 can be supplied to any one coil unit (e.g., 34) of the remaining three adjacent coil units (e.g., 34 to 36) of the first coil 120A, the fifth drive signal I5 can be supplied to another coil unit (e.g., 35) of the three coil units (e.g., 34 to 36) of the first coil 120A, and the sixth drive signal I6 can be supplied to the remaining coil unit 36 ​​of the three adjacent coil units (e.g., 34 to 36) of the first coil 120A.

[0211] The three-phase drive current may be supplied as the fourth drive signal I4 to the sixth drive signal I6, and the above description of the first drive signal I1 to the third drive signal I3 may be applied equally or similarly to the fourth drive signal I4 to the sixth drive signal I6. For example, the fourth drive signal I4 may be the same as the first drive signal I1, the fifth drive signal I5 may be the same as the second drive signal I2, and the sixth drive signal I6 may be the same as the third drive signal I3.

[0212] Reference Fig. 9 ,exist Fig. 9 When the three-phase drive currents I1 to I3 shown in are supplied to the first coil unit 31 to the third coil unit 33, a first drive force (or first force) Fz can be generated in the first direction by interaction with the first magnet 130A, and a second drive force (or second force) Fy can be generated in the second direction (e.g., the Y-axis direction). In addition, the drive force Fx or the force in the third direction (e.g., the X-axis direction) may not be generated.

[0213] When the three-phase drive currents I1 to I3 are supplied to the first to third coil units 31 to 33, a magnetic field is formed in the coil units 31 to 33, and the first magnet 130A is positioned so that the magnetic field formed in the coil units 31 to 33 is synchronized with the first magnet 130A. Since the drive currents I1 to I3 are AC signals with different phases, the magnetic fields of the coil units 31 to 33 vary. That is, the position where the magnetic field strength of the coil units 31 to 33 is the strongest can vary, and the first magnet 130A can move in synchronization with the position change.

[0214] Reference Fig.10 , the waveform 301 indicates the sum of the magnetic field strengths generated by the first coil unit 31 to the third coil unit 33 when the three-phase driving currents I1 to I3 are supplied to the first coil unit 31 to the third coil unit 33. The waveform 301 may be the sum of the magnetic field strengths generated by the first coil unit 31 to the third coil unit 33 when the first magnet 130A is positioned at a certain point within the travel range.

[0215] As the current values ​​of the driving currents I1 to I3 vary, the waveform 301 also varies. For example, as the current values ​​of the driving currents I1 to I3 vary, the waveform 301 may shift in a first direction (306A). Fig.10 The waveform 302 shown in the figure indicates the strength of the magnetic field of the first magnet 130A, and the waveform 301 and the waveform 302 may match each other or may be synchronized with each other. As the waveform 301 shifts in the first direction (306A), the waveform 302 may shift in the first direction (306B) synchronously with the waveform 301.

[0216] When a straight line 601 passing through the center of a series of three coil units 31 to 33 and parallel to the second direction (e.g., the Y-axis direction) is aligned with the center of the first magnet 130A, a distance L31 in the first direction between the end 33A1 or 33A2 of the first magnet 130A and the end 33B1 or 33B2 of the series of three coil units 31 to 33 may be half the length of the partition wall 403 of the first magnet 130A in the first direction. This configuration is made to synchronize the waveform 301 and the waveform 302 with each other.

[0217] For example, the center of a series of three coil units 31 to 33 may be the center of the cavity 201 in the second coil unit 32 disposed between the first coil unit 31 and the third coil unit 33 .

[0218] For example, the center of the first magnet 130A may be the center of the partition wall 403 .

[0219] The first magnet 130A can be moved in the first direction by the first driving force Fz. Fig. 9As shown in , the first driving force Fz slightly varies over the entire stroke range (0 to 9 mm) of the first magnet 130A. Since the waveform 301 and the waveform 302 are synchronized with each other, the first driving force Fz does not vary much, so that a uniform first driving force can be obtained.

[0220] Fig.11 shows an arrangement of two coil units 20A and 20B and a magnet 25 according to a comparative example, and Fig.12 Shown by Fig.11 The Lorentz force is generated by the interaction between the coil units 20A and 20B shown in FIG. 2 and the magnet 25. Currents (eg, direct currents) having opposite directions to each other may be supplied to the two coil units 20A and 20B.

[0221] Fig.11 The case shown in (a) may be a case where the center of the magnet 25 is positioned between the two coil units 20A and 20B or close to the center of a series of two coil units 20A and 20B. That is, Fig.11 The situation shown in (a) may be that the magnet 25 is positioned in the middle of the travel range of the magnet 25 ( Fig.12 The case of St1[mm]).

[0222] Fig.11 The case shown in (b) may be a case where the magnet 25 is located close to the end of one coil unit 20B of the two coil units 20A and 20B. Fig.11 The situation shown in (b) may be that the magnet 25 is positioned at one end of the travel range of the magnet 25 ( Fig.12 The situation of trip 1 or trip 2).

[0223] exist Fig.11 In (a), the region 501 in which the actual force is generated may include a portion of the magnet 25, a portion of the first coil unit 20A, and a portion of the second coil unit 20B. Fig.11 In (a), the force generated by the magnet 25 and the first coil unit 20A and the force generated by the magnet 25 and the second coil unit 20B can be combined into a larger force, so that the driving force can be maximized.

[0224] exist Fig.11In (b), the regions 502 and 503 in which the actual force is generated may include a portion of the magnet 25, a portion of the second coil unit 20B, another portion of the magnet 25, and another portion of the second coil unit 20B. Since the direction of the current in a portion of the second coil unit 20B and the direction of the current in another portion of the second coil unit 20B are opposite to each other, the force generated by a portion of the magnet 25 and the portion 502 of the second coil unit 20B and the force generated by the magnet 25 and the other portion 503 of the second coil unit 20B can offset each other, thereby reducing the driving force.

[0225] Reference Fig.12 , there is a large difference between the Lorentz force LF1 generated when the magnet 25 is positioned in the middle of the stroke range (St1 [mm]) and the Lorentz force LF2 generated when the magnet 25 is positioned at one end of the stroke range (e.g., stroke 1 or stroke 2). That is, since the force generated between the magnet 25 and the coil units 20A and 20B at one end of the stroke range (e.g., stroke 1 or stroke 2) is small, the stability and reliability of the movement control of the mobile unit in the first direction may be reduced.

[0226] In an embodiment, the movement of the second lens group 622 can be controlled with a constant or uniform driving force within the travel range of the first magnet 130A or within the travel range of the second lens assembly 622.

[0227] Reference Fig. 9 In an embodiment, there is a very small difference in magnitude between the first driving force Fz generated by the first magnet 130A and the coil units 31 to 33 at the center St2 of the stroke range of the first magnet 130A and the first driving force Fz generated at one end of the stroke range, stroke 1 or stroke 2. Therefore, in an embodiment, a uniform driving force for the movement of the second lens assembly 622 in the optical axis direction can be obtained, and the control accuracy of the movement of the second lens group 622 in the optical axis direction can be improved.

[0228] As shown in Figures 6 to Fig. 9 As described, according to the embodiment, the first magnet 130A and the three coil units 31 to 33 supplied with the three-phase drive currents I1 to I3 have an appropriate size and setting relationship, so that the first drive force Fz does not change much. Therefore, a uniform first drive force can be obtained, and therefore, the accuracy of the zoom operation of the second lens assembly 622 can be improved.

[0229] In addition, in the embodiment, since the six coil units 31 to 36 are sequentially arranged in the first direction, the movable distance of the first magnet 130A can be increased, and thus, the stroke range of the second lens assembly 622 for the zoom operation can be increased.

[0230] The description of the first coil 120A and the first magnet 130A can be applied to the second coil 120B and the second magnet 130B in the same or similar manner. Therefore, in an embodiment, the movement of the third lens assembly 624 can be controlled with a constant or uniform driving force within the travel range of the second magnet 130B or the travel range of the third lens assembly 624. In an embodiment, there is a very small size difference between the first driving force Fz generated by the second magnet 130B and the coil units 41 to 43 at the center of the travel range of the second magnet 130B and the first driving force Fz generated at any one of the two ends of the travel range. Therefore, in an embodiment, a uniform driving force for the movement of the third lens assembly 624 in the optical axis direction can be obtained, and the control accuracy of the movement of the third lens assembly 624 in the optical axis direction can be improved.

[0231] From Figure 6 to Fig. 9 As can be seen from the above description, according to the embodiment, the second magnet 130B and the three coil units 41 to 43 supplied with the three-phase drive current have an appropriate size and setting relationship, so that the first drive force Fz does not change much. Therefore, a uniform first drive force can be obtained, and therefore, the accuracy of the focusing operation of the third lens assembly 624 can be improved.

[0232] In addition, in an embodiment, since the six coil units 41 to 46 of the second coil 120B are sequentially arranged in the first direction, the movable distance of the second magnet 130B can be increased, and thus, the travel range of the third lens assembly 624 for focusing operation can be increased.

[0233] Fig.13 is a schematic diagram of a camera apparatus 200 according to an embodiment.

[0234] Reference Fig.13 , the camera device 200 may include the actuator 100 and the image sensor 810 according to the embodiment.

[0235] The image sensor 810 may receive and detect light that has passed through the lens unit 620, and may convert the detected light into an electrical signal. For example, the image sensor 810 may include an imaging area for detecting light. Here, the imaging area may alternatively be referred to as an "effective area", "light receiving area", or "active area". For example, the imaging area may include a plurality of pixels on which an image is formed.

[0236] The image sensor 810 may be positioned behind the third lens assembly 624. For example, the image sensor 810 may be disposed to face the third lens array 59 of the third lens assembly 624 in the first direction.

[0237] The camera apparatus 200 may further include an optical filter 560 disposed between the image sensor and the lens unit 620 so as to face the image sensor in the first direction.

[0238] The filter 560 can be used to prevent light in a specific frequency band that has passed through the lens unit 620 from being introduced into the image sensor 810. The filter 560 can be, for example, an infrared cut filter, but the present invention is not limited thereto. For example, the filter 560 can be arranged parallel to the xy plane perpendicular to the first direction.

[0239] The camera device 200 may further include a circuit board 800 on which an image sensor 810 is disposed or mounted. The image sensor 810 may be conductively connected to the circuit board 800.

[0240] The camera apparatus 200 may further include an actuator 310 for OIS driving.

[0241] The actuator 310 may be disposed in front of the actuator 100. The actuator 310 may change the optical path. For example, the actuator 310 may include an optical component configured to change the optical path. The optical component may include a reflector capable of changing the direction of travel of light. For example, the optical component may be a prism configured to reflect light, but the present disclosure is not limited thereto. In another embodiment, the optical component may be a reflector. The optical component may change the optical path of the incident light into an optical axis parallel to the central axis Z of the lens unit 620 to convert the incident light into parallel light, and the parallel light may reach the image sensor 810 via the first lens assembly 640, the second lens assembly 622, and the third lens assembly 624.

[0242] For example, the actuator 310 may move the optical member to perform an optical image stabilization (OIS) operation for hand shake compensation. For example, the actuator 310 may rotate the optical member relative to the X-axis or the Y-axis and may move the image formed on the image sensor 810 in the X-axis direction or the Y-axis direction. The actuator 310 may include a coil and a magnet to move the optical member.

[0243] In addition, for the purpose of forming an image of an object existing in space using reflection, refraction, absorption, interference, and diffraction as characteristics of light, for the purpose of improving visibility, for the purpose of recording and reproducing an image using a lens, or for the purpose of optical measurement or image propagation or transmission, the camera device 200 according to the embodiment may be included in an optical instrument. For example, the optical instrument according to the embodiment may be a cellular phone, a mobile phone, a smart phone, a portable smart device, a digital camera, a laptop computer, a digital broadcast terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, etc., but is not limited thereto, and may also be any device for capturing an image or a picture.

[0244] Fig.14 is a perspective view of an optical instrument 200A according to an embodiment, and Fig.15 yes Fig.14 A configuration diagram of an optical instrument 200A shown in FIG.

[0245] Reference Fig.14 and Fig.15 The optical instrument 200A (hereinafter referred to as a “portable terminal”) may include a main 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 controller 780 and a power supply 790.

[0246] Fig.14 The body 850 shown in the figure may have a bar shape, but is not limited thereto, and may be any of various types, for example, such as a sliding type, a folding type, a swing type, or a rotating type, in which two or more sub-bodies are coupled to be movable relative to each other.

[0247] The body 850 may include a shell (housing, housing, cover, etc.) defining its appearance. In an example, the body 850 may be divided into a front shell 851 and a rear shell 852. Various electronic components of the terminal may be installed in a space defined between the front shell 851 and the rear shell 852.

[0248] The wireless communication unit 710 may include one or more modules that enable wireless communication between the terminal 200A and a wireless communication system or between the terminal 200A and a network in which the terminal 200A is located. In an example, the wireless communication unit 710 may include a broadcast receiving module 711, a mobile communication module 712, a wireless Internet module 713, a near field communication module 714, and a location information module 715.

[0249] The audio / video (A / V) input unit 720 is used to input an audio signal or a video signal, and may include a camera 721 and a microphone 722 .

[0250] The camera 721 may include the camera device 200 according to an embodiment.

[0251] The sensing unit 740 can sense the current state of the terminal 200A, for example, the open or closed state of the terminal 200A, the position of the terminal 200A, whether there is a user touch, the orientation of the terminal 200A, or the acceleration / deceleration of the terminal 200A, and can generate a sensing signal to control the operation of the terminal 200A. For example, in the case where the terminal 200A is a sliding type phone, it can be detected whether the sliding type phone is opened or closed. In addition, the sensor is used to sense whether power is supplied from the power supply 790, or whether the interface unit 770 is coupled to an external device.

[0252] The input / output unit 750 is used to generate visual, auditory or tactile input or output. The input / output unit 750 may generate input data for controlling the operation of the terminal 200A, and may display information processed in the terminal 200A.

[0253] The input / output unit 750 may include a keyboard unit 730, a display module 751, a sound output module 752, and a touch screen panel 753. The keyboard unit 730 may generate input data in response to an input to the keyboard.

[0254] The display module 751 may include a plurality of pixels whose colors vary in response to an electrical signal. In an 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, or a 3D display.

[0255] The sound output module 752 may output audio data received from the wireless communication unit 710 in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, or a broadcast reception mode, or may output audio data stored in the memory unit 760 .

[0256] The touch screen panel 753 may convert a capacitance variation caused by a user's touch on a specific area of ​​the touch screen into an electric input signal.

[0257] The memory unit 760 may store programs for processing and controlling of the controller 780, and may temporarily store input / output data (e.g., phonebook, messages, audio, still images, pictures, and moving images). For example, the memory unit 760 may store images captured by the camera 721, such as pictures or moving images.

[0258] The interface unit 770 is used as a connection channel between the terminal 200A and an external device. The interface unit 770 can receive data or power from the external device, and can send the data or power to the corresponding components in the terminal 200A, or can send the data in the terminal 200A to the external device. For example, the interface unit 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 with an identification module, an audio input / output (I / O) port, a video input / output port, and a headset port.

[0259] The controller 780 may control the overall operation of the terminal 200A. For example, the controller 780 may perform control and processing related to voice calls, data communications, and video calls.

[0260] The controller 780 may include a multimedia module 781 for multimedia playback. The multimedia module 781 may be provided in the controller 780 or may be provided separately from the controller 780.

[0261] The controller 780 may perform a pattern recognition process by which a writing or drawing input to the touch screen is perceived as characters or images.

[0262] The power supply 790 may provide power required to operate various components upon receiving external power or internal power under the control of the controller 780 .

[0263] The features, structures, effects, etc. described above in the embodiments are included in at least one embodiment of the present disclosure, but are not necessarily limited to one embodiment. In addition, the features, structures, effects, etc. illustrated in the corresponding embodiments can be combined with other embodiments or modified by those skilled in the art. Therefore, the content related to such combinations and modifications should be interpreted as falling within the scope of the present disclosure.

[0264] [Industrial Applicability]

[0265] The embodiments are applicable to an actuator and a camera device that can ensure a uniform and stable driving force for movement of a moving unit in an optical axis direction and can increase the stroke range of the moving unit and the camera device.

Claims

1. An actuator, include: Lens barrel; a magnet disposed on the lens barrel; as well as a coil configured to move the lens barrel in a first direction by interacting with the magnet, The coil includes a first coil unit, a second coil unit and a third coil unit arranged in the first direction, wherein the magnet overlaps the first coil unit, the second coil unit, and the third coil unit in a second direction perpendicular to the first direction, and The length of the magnet in the first direction is smaller than the sum of the lengths of the first coil unit, the second coil unit and the third coil unit in the first direction.

2. The actuator according to claim 1, in, A length of the magnet in the first direction is greater than a sum of lengths of two coil units among the first coil unit, the second coil unit, and the third coil unit in the first direction.

3. The actuator according to claim 1, in, Signals having different phases are supplied to the first coil unit, the second coil unit, and the third coil unit, respectively.

4. The actuator according to claim 1, in, AC signals having different phases are supplied to the first coil unit, the second coil unit, and the third coil unit, respectively.

5. The actuator according to claim 1, in, Signals having a phase difference of 120 degrees from each other are supplied to the first coil unit, the second coil unit, and the third coil unit, respectively.

6. The actuator according to claim 1, in, Alternating currents having a phase difference of 120 degrees from each other are supplied to the first coil unit, the second coil unit, and the third coil unit, respectively.

7. The actuator according to claim 1, in, The magnet includes: a first magnet portion including an N pole and an S pole facing each other in the second direction; a second magnet portion including an S pole and an N pole facing each other in the second direction; and a partition wall provided between the first magnet portion and the second magnet portion, and Wherein, the first magnet portion and the second magnet portion are arranged in the first direction, with the partition wall interposed therebetween.

8. The actuator according to claim 7, in, The length of the first magnet portion in the first direction is greater than the length of each of the first coil unit, the second coil unit, and the third coil unit in the first direction, and The length of the second magnet portion in the first direction is greater than the length of each of the first coil unit, the second coil unit and the third coil unit in the first direction.

9. The actuator according to claim 7, in, A length of the first magnet portion in the first direction is greater than a length of the first coil unit in the first direction.

10. The actuator according to claim 7, in, A length of the second magnet portion in the first direction is greater than a length of the first coil unit in the first direction.

Images