Auto focusing driving device, and camera module and optical device including same

Abstract

An embodiment comprises: a bobbin disposed in a housing; ball members disposed between the bobbin and the housing; a circuit board disposed in the housing; a magnet disposed on the bobbin and including a first magnet unit and a second magnet unit positioned opposite to each other; and a coil disposed on the circuit board and including a first coil unit facing the first magnet unit and a second coil unit facing the second magnet unit, wherein a first driving signal for driving the first coil unit is applied to the first coil unit, and a second driving signal for driving the second coil unit is applied to the second coil unit.

Description

Autofocusing driving device, and camera module and optical device including the same

[0001] The embodiment relates to an auto-focusing driving device and a camera module and optical device including the same.

[0002] Since it is difficult to apply the voice coil motor (VCM) technology used in conventional camera modules to ultra-small, low-power camera modules, active research has been conducted in this regard.

[0003] Demand and production of electronic products such as smartphones and camera-equipped mobile phones are increasing. Mobile phone cameras are trending toward higher resolution and miniaturization, and consequently, actuators are also becoming smaller, larger, and more multifunctional. To achieve higher resolution mobile phone cameras, improved camera performance and additional features such as autofocus, shutter shake reduction, and zooming are required.

[0004] The embodiment provides an autofocusing driving device capable of improving electromagnetic force for AF driving, and a camera device and optical device including the same.

[0005] An autofocusing driving device according to an embodiment comprises: a housing; a bobbin disposed within the housing; a ball member disposed between the bobbin and the housing; a circuit board disposed in the housing; a magnet disposed in the bobbin and including a first magnet unit and a second magnet unit positioned opposite to each other; and a coil disposed on the circuit board and including a first coil unit facing the first magnet unit and a second coil unit facing the second magnet unit, wherein a first driving signal for driving the first coil unit is applied to the first coil unit, and a second driving signal for driving the second coil unit is applied to the second coil unit.

[0006] The circuit board includes first and second pads electrically connected to the first coil unit and third and fourth pads electrically connected to the second coil unit, and the first driving signal can be applied to the first and second pads, and the second driving signal can be applied to the third and fourth pads.

[0007] The first coil unit and the second coil unit may not be connected to each other.

[0008] The first and second pads of the circuit board may not be electrically connected to the third and fourth pads.

[0009] The auto-focusing device may include a control unit that supplies the first driving signal and the second driving signal. The control unit may be disposed on the circuit board and electrically connected to the circuit board.

[0010] The auto-focusing device is disposed on the circuit board and includes a position sensor that detects displacement of the bobbin, and an output of the position sensor can be transmitted to the control unit. The circuit board includes first to fourth terminals electrically connected to the control unit, and the control unit may be a driver IC that performs data communication with a host through the first to fourth terminals.

[0011] The auto-focusing device is arranged on the circuit board and includes a position sensor for detecting displacement of the bobbin, the position sensor includes a first sensor for detecting a magnetic field of the first magnet unit and a second sensor for detecting a magnetic field of the second magnet unit, the first sensor can generate the first driving signal, and the second sensor can generate the second driving signal.

[0012] The first sensor can supply the first driving signal to the first pad and the second pad of the circuit board, and the second sensor can supply the second driving signal to the third pad and the fourth pad of the circuit board.

[0013] The circuit board includes first to fourth terminals, each of the first sensor and the second sensor includes first to fourth terminals, and each of the first to fourth terminals of each of the first sensor and the second sensor can be electrically connected to a corresponding one of the first to fourth terminals of the circuit board.

[0014] The circuit board includes first to fourth terminals, and the first sensor includes a first terminal electrically connected to a first pad of the circuit board; a second terminal electrically connected to a second pad of the circuit board; a third terminal electrically connected to the first terminal of the circuit board; a fourth terminal electrically connected to the second terminal of the circuit board; a fifth terminal electrically connected to the third terminal of the circuit board; and a sixth terminal electrically connected to the fourth terminal of the circuit board, and the first driving signal is output from the first terminal and the second terminal of the first sensor, and the first sensor can communicate data with a host through the first to fourth terminals of the circuit board.

[0015] The second sensor includes a first terminal electrically connected to a third pad of the circuit board; a second terminal electrically connected to a fourth pad of the circuit board; a third terminal electrically connected to the first terminal of the circuit board; a fourth terminal electrically connected to the second terminal of the circuit board; a fifth terminal electrically connected to the third terminal of the circuit board; and a sixth terminal electrically connected to the fourth terminal of the circuit board, and the second driving signal is output from the first terminal and the second terminal of the second sensor, and the second sensor can communicate data with the host through the first to fourth terminals of the circuit board.

[0016] The circuit board includes a first substrate disposed on a first side of the housing, a second substrate disposed on a second side of the housing opposite the first side, and a third substrate disposed on a third side of the housing between the first side and the second side and connecting the first substrate and the second substrate, and the first coil unit may be disposed on the first substrate, and the second coil unit may be disposed on the second substrate.

[0017] The first coil unit may be a ring-shaped coil wound around an axis perpendicular to the outer surface of the first side of the housing, and the second coil unit may be a ring-shaped coil wound around an axis perpendicular to the outer surface of the second side of the housing. At least a portion of the ball member may be disposed between the first magnet unit and the second magnet unit.

[0018] In an embodiment, the first coil unit and the second coil unit can be electrically connected to the circuit board through separate channels, and the resistance of the AF coil for AF driving can be lowered.

[0019] In an embodiment, the current flowing in the AF coil can be increased, thereby improving the electromagnetic force for driving the AF.

[0020] In the embodiment, the degree of freedom in the use of the current of the driving signal and the resistance of the channel can be increased in each channel.

[0021] In the embodiment, since the electromagnetic force is increased by the interaction between the magnet unit and the coil unit, a heavy and large-diameter lens module can be driven, and a camera device having a high resolution can be implemented.

[0022] Fig. 1 is a perspective view of an auto-focusing driving device according to an embodiment.

[0023] Fig. 2 is a perspective view of the auto-focusing driving device of Fig. 1 excluding the cover member.

[0024] Figure 3 is an exploded perspective view of the auto-focusing driving device.

[0025] Figure 4a is a first perspective view of the bobbin.

[0026] Figure 4b is a second perspective view of the bobbin.

[0027] Figure 4c is a perspective view of the bobbin, magnet, and cloud member.

[0028] Figure 4d is a perspective view of the bottom of the bobbin and magnet.

[0029] Figure 5a is a first perspective view of the housing.

[0030] Figure 5b is a second perspective view of the housing.

[0031] Figure 6a is an exploded perspective view of the housing, coil, position sensor, capacitor, control unit, and circuit board.

[0032] Figure 6b is a perspective view of the combined housing, coil, position sensor, capacitor, control unit, and circuit board of Figure 6a.

[0033] Fig. 7a is a cross-sectional view of the auto-focusing driving device in the AB direction of Fig. 2.

[0034] Fig. 7b is a cross-sectional view of the auto-focusing driving device in the CD direction of Fig. 2.

[0035] Fig. 7c is a cross-sectional view of the auto-focusing drive device in the EF direction of Fig. 2.

[0036] Fig. 7d is a cross-sectional view of the auto-focusing driving device in the GH direction of Fig. 2.

[0037] Figure 8 shows a circuit diagram of a circuit board, a control unit, a first coil unit, and a second coil unit.

[0038] FIG. 9 shows a circuit diagram of a circuit board, a control unit, a first coil unit, and a second coil unit according to another embodiment.

[0039] FIG. 10 shows a circuit diagram of a circuit board, a control unit, a first coil unit, and a second coil unit according to another embodiment.

[0040] Fig. 11 shows an exploded perspective view of a camera device according to an embodiment.

[0041] Fig. 12 shows a perspective view of an optical device according to an embodiment.

[0042] Figure 13 shows a configuration diagram of the optical device illustrated in Figure 12.

[0043]

[0044] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0045] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0046] In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0047] In addition, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention. In this specification, the singular may also include the plural unless specifically stated in the phrase, and when it is described as "A and / or at least one (or more) of B, C," it may include one or more of all combinations that can be combined with A, B, and C.

[0048] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and are not intended to limit the nature, order, or sequence of the components.

[0049] And, when it is described that a component is 'connected', 'joined' or 'connected' to another component, it can include not only cases where the component is directly connected, joined or connected to the other component, but also cases where the component is 'connected', 'joined' or 'connected' by another component between the component and the other component. Also, when it is described that it is formed or arranged "above or below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Also, when it is expressed as "above" or "below", it can include the meaning of the downward direction as well as the upward direction based on one component.

[0050] Hereinafter, the term “auto focusing driving device” may be replaced with a lens driving device, a lens driving unit, a VCM (Voice Coil Motor), an actuator, or a lens moving device.

[0051] Hereinafter, the term "coil" may be replaced with "coil unit," and the term "elastic member" may be replaced with "elastic unit" or "spring." In addition, in the following description, the term "terminal" may be replaced with "pad," "electrode," "conductive layer," or "bonding portion."

[0052] For convenience of explanation, the auto-focusing driving device according to the embodiment is described using the Cartesian coordinate system (x, y, z), but may be described using another coordinate system, and the embodiment is not limited thereto. In each drawing, the x-axis and the y-axis may mean a direction perpendicular to the z-axis, which is the optical axis direction. The optical axis direction may be a direction parallel to the optical axis. For example, the optical axis direction may be a direction passing through the optical axis and parallel to the optical axis. The z-axis direction, which is the optical axis direction, may be defined as 'any one of the first to third directions', the x-axis direction may be defined as 'another one of the first to third directions', and the y-axis direction may be defined as 'the other remaining one of the first to third directions'. The optical axis may be the optical axis of a lens module (or lens). In addition, the optical axis direction may be a direction perpendicular to an imaging area (or an active area) of an image sensor.

[0053] 'Auto-focusing' refers to automatically focusing an image of a subject on an image sensor surface. An auto-focusing driving device according to an embodiment can perform an auto-focusing operation by moving an optical module comprising at least one lens in a first direction.

[0054] FIG. 1 is a perspective view of an auto-focusing driving device (100) according to an embodiment, FIG. 2 is a perspective view of the auto-focusing driving device (100) of FIG. 1 excluding the cover member (300), FIG. 3 is an exploded perspective view of the auto-focusing driving device (100), FIG. 4a is a first perspective view of a bobbin (110), FIG. 4b is a second perspective view of the bobbin (110), FIG. 4c is a perspective view of a bobbin (110), a magnet (130B), and a cloud member (31, 32), FIG. 4d is a bottom perspective view of the bobbin (110) and the magnet (130A), FIG. 5a is a first perspective view of a housing (140), FIG. 5b is a second perspective view of the housing (140), and FIG. 6a is a perspective view of a housing (140), a coil (120), and a position FIG. 6A is a perspective view showing an exploded view of a sensor (170), a capacitor (195), a control unit (310), and a circuit board (190), and FIG. 6B is a perspective view showing a combination of a housing (140), a coil (120), a position sensor (170), a capacitor (195), a control unit (310), and a circuit board (190), and FIG. 7A is a cross-sectional view of an auto-focusing driving device (100) in the AB direction of FIG. 2, and FIG. 7B is a cross-sectional view of an auto-focusing driving device (100) in the CD direction of FIG. 2, and FIG. 7C is a cross-sectional view of an auto-focusing driving device (100) in the EF direction of FIG. 2, and FIG. 7D is a cross-sectional view of an auto-focusing driving device (100) in the GH direction of FIG. 2.

[0055] Referring to FIGS. 1 to 7d, the auto-focusing driving device (100) may include a bobbin (110), a magnet (130), a coil (120), a position sensor (170), and a control unit (310).

[0056] The auto-focusing driving device (100) may further include a cloud member (31, 32) disposed between the bobbin (110) and the housing (140). The auto-focusing driving device (100) may further include a circuit board (190) electrically connected to the position sensor (170). The auto-focusing driving device (100) may further include a yoke (90) for providing a supporting force for supporting the bobbin (110). The auto-focusing driving device (100) may further include a capacitor (195) electrically connected to the circuit board (190). The auto-focusing driving device (100) may further include a cover (410) for preventing the cloud member (31, 32) from coming off. In addition, the auto-focusing driving device (100) may further include a cover member (300) for accommodating the bobbin (110).

[0057] The bobbin (110) may be coupled with or mounted on a lens module (400). In another embodiment, instead of the lens module (400), an optical element or an optical module may be mounted or mounted on the bobbin (110). In another embodiment, instead of the lens module (400), a prism or a diffractive optical element (DOE) or an image sensor module may be mounted or mounted on the bobbin (110).

[0058] The bobbin (110) can be placed within the housing (140). The bobbin (110) can be moved in the direction of the optical axis. The bobbin (110) can be moved in the first direction by the electromagnetic interaction between the coil (120) and the magnet (130). The bobbin (110) can also be expressed as a “lens holder” or a lens carrier.

[0059] The bobbin (110) may have an opening (101) for mounting a lens or lens barrel. For example, the opening (101) of the bobbin (110) may be hollow or a through hole. The shape of the opening (101) may be circular, oval, or polygonal, but is not limited thereto. The bobbin (110) may include at least one first stopper (114) disposed on the upper surface. For example, the first stopper (114) may protrude from the upper surface of the bobbin (1110) in the optical axis direction or upward direction. The first stopper (114) may prevent the upper surface of the bobbin (110) from directly colliding with the inner surface of the upper plate (301) of the cover member (300). In addition, the bobbin (110) may also include at least one second stopper (214) formed on the lower surface. The second stopper (214) can protrude from the lower surface of the bobbin (110).

[0060] The bobbin (110) may include a plurality of sides. The sides of the bobbin (110) may correspond to or face the sides (141-1 to 141-4) of the housing (140). The bobbin (110) may include a mounting portion (112) for placing or mounting a magnet (130). The mounting portion (112) may be formed on at least one of the plurality of sides (or side surfaces, or outer surfaces) of the bobbin (110). The mounting portion (112) may be formed on two sides that are positioned opposite to each other among the plurality of sides. The mounting portion (112) may be in the form of a groove. The number of mounting portions may be equal to the number of magnet units included in the magnet (130).

[0061] The bobbin (110) may include a body (110A) in which an opening (101) for coupling with a lens module (400) is formed, and a protrusion (111) protruding from the body (11A). A mounting portion (112) may be formed on the protrusion (111) of the bobbin (110). A magnet (130) may be arranged on the protrusion (111) of the bobbin (110). In another embodiment, the protrusion (111) may be omitted, and the magnet (130) may be arranged on at least one of the sides of the bobbin (110).

[0062] The number of protrusions (111) may be the same as the number of magnet units included in the magnet (130). For example, the protrusions (111) may include a first protrusion (111A) arranged on a first side of the bobbin (110) and a second protrusion (111B) arranged on a second side of the bobbin (110) located opposite the first side of the bobbin (110).

[0063] The mounting portion (112) may include a first mounting portion (112A) disposed on a first protrusion (111A) of the bobbin (110) and a second mounting portion (112B) disposed on a second protrusion (111B) of the bobbin (110). The first magnet unit (130A) may be disposed on the first mounting portion (112A), and the second magnet unit (130B) may be disposed on the second mounting portion (112B). The mounting portions (112A, 112B) may be grooves that are recessed from the outer surface of the protrusion (111). An adhesive may be applied to the mounting portion (112), and the magnet units (130A, 130B) may be coupled to the mounting portion (112) by the adhesive. A path (112A) may be formed in the mounting portion (112) to facilitate the flow of the adhesive.

[0064] The bobbin (110) may include at least one protrusion (115) protruding from a side or lateral surface of the bobbin (110). The protrusion (115) may protrude in a direction perpendicular to the optical axis from an outer surface of the bobbin (110) (e.g., body (110A)). For example, the bobbin (110) may include at least one first protrusion (115A) protruding from a third side of the bobbin (110) and at least one second protrusion (115B) protruding from a fourth side located opposite the third side of the bobbin (110).

[0065] The bobbin (110) may include a groove (116) for arranging or seating the ball cover (410). The groove (116) may be formed on the upper surface of the bobbin (110). The groove (116) may be formed on the upper surface of the protrusion (111). In other embodiments, the groove (116) may be omitted.

[0066] Referring to FIGS. 4B and 4C, the bobbin (110) may include at least one groove (21) for arranging or receiving a cloud member (31, 32). The groove (21) may be alternatively expressed as a “receiving groove,” a “guide groove,” a guide portion, or a guide rail. At least a portion of the cloud member (31, 32) may be in contact with the groove (21). The groove (21) may be formed in a protrusion (111B) of the bobbin (110). For example, the groove (21) may be formed on a second side of the protrusion (111A) located opposite a first side of the protrusion (111A) on which the magnet unit (130A) is arranged. In another embodiment, the groove (21) may be formed on a first side of the protrusion (111A) on which the magnet unit (130A) is arranged.

[0067] For example, the groove (21) may include a first groove (21A) formed at one end of the first protrusion (111A) of the bobbin (110) and a second groove (21B) formed at the other end of the first protrusion (111B). The first groove (21A) may be arranged adjacent to one end of the first magnet unit (130A), and the second groove (21B) may be arranged adjacent to the other end of the first magnet unit (130B). The groove (21) may overlap the first magnet unit (130A) in a direction in which the first magnet unit (130A) and the second magnet unit (130B) face each other.

[0068] For example, the groove (21) may include an opening that opens to the upper surface of the bobbin (110). Also, for example, the lower portion of the groove (21) may include an opening that opens to the lower surface of the bobbin (110). In other embodiments, the groove (21) may not open to at least one of the upper surface or the lower surface of the bobbin (110).

[0069] For example, the groove (21) may be formed to extend in the direction of the optical axis. For example, the groove (21) may extend from the upper surface to the lower surface of the bobbin (110). In another embodiment, the groove (21) may extend in the direction of the optical axis so as to be formed between the upper surface and the lower surface of the bobbin (110). For example, the groove (21) may include two or more side surfaces. For example, when viewed from above, the shape of the groove (21) may be a 'V' or a 'U' shape. Alternatively, when viewed from above, the shape of the groove (21) may be a polygonal shape (e.g., a triangle, a square, a pentagon, etc.). Although FIG. 4b exemplifies two grooves, in another embodiment, the number of grooves (21) may be one or three or more.

[0070] The magnet (130) can be placed on the bobbin (110). The magnet (130) can be coupled to the bobbin (110). The magnet (130) can include a first magnet unit (130A) and a second magnet unit (130B) that are spaced apart from each other. The first magnet unit (130A) and the second magnet unit (130B) can be positioned opposite each other with the opening (101) of the bobbin (110) interposed therebetween. For example, the first magnet unit (130A) and the second magnet unit (130B) can be positioned opposite each other in the Y-axis direction. The magnet (130) can include two or more magnet units. In another embodiment, the magnet (130) can include one magnet unit (130A or 130B).

[0071] Each of the first and second magnet units (130A, 130B) may be a two-pole magnet having two different polarities and a naturally formed boundary between the different polarities. In another embodiment, each of the first and second magnet units (130A, 130B) may be a four-pole magnet to enhance the electromagnetic force. For example, each of the first and second magnet units (130A, 130B) may include a first magnet including a north pole and a south pole, a second magnet including a south pole and a north pole, and a partition wall disposed between the first magnet and the second magnet. In this case, the partition wall may include a substantially non-magnetic portion having a section with little polarity, may be filled with air or made of a non-magnetic material, and may be expressed as a "neutral zone."

[0072] The housing (140) can accommodate at least a portion of the bobbin (110) on the inside. The housing (140) can support at least one of the coil (120), the circuit board (190), and the yoke (90). The housing (140) can be coupled to the cover member (300).

[0073] The housing (140) may have an upper side that is open to accommodate the bobbin (110). The housing (140) may include a cavity for accommodating the bobbin (110). In addition, the housing (140) may include a hole (201) (or hollow) for exposing at least a portion of the lens module (400) mounted on the bobbin (110). The hole (201) may be located at the center or in the central region of the housing (140). The hole (201) may be a through hole that passes through the housing (140) in the direction of the optical axis. The hole (201) may pass through the lower part (142) of the housing (140).

[0074] The housing (140) may include a plurality of sides (141-1 to 141-4). The housing (140) may include a corner or corner portion (CA1 to CA4) positioned between two adjacent sides.

[0075] The first side (141-1) and the second side (141-2) of the housing (140) may be positioned opposite each other, and the third side (141-3) and the fourth side (141-4) of the housing (140) may be positioned opposite each other. The third side (141-3) and the fourth side (141-4) may be positioned between the first side (141-1) and the second side (141-2).

[0076] The first to fourth side portions (141-1 to 141-4) of the housing (140) may correspond to or face a plurality of side plates of the side plate (302) of the cover member (300) and may be arranged parallel to each other.

[0077] The housing (140) may include an opening or hole (141a) formed in the first side (141-1) (or the first side or the first outer surface) to place or accommodate the first coil unit (120A). The housing (140) may include an opening or hole (141b) formed in the second side (141-2) (or the second side or the second outer surface) to place or accommodate the second coil unit (120B). In another embodiment, the housing (140) may have a groove or recess instead of the hole (141a, 141b) for placing the coil (120). In another embodiment, the holes (141a, 141b) may be omitted.

[0078] The housing (140) may include a mounting groove (146) for placing or mounting the circuit board (190). For example, the mounting groove (146) may be formed on the outer surface of the first to third side portions (141A to 141C) of the housing (140). In other embodiments, the mounting groove (146) may be omitted. For example, the circuit board (190) may be coupled to the housing (140) by an adhesive. The adhesive may be applied within the mounting groove (146).

[0079] The housing (140) may include at least one protrusion (41) for coupling with the circuit board (190). For example, the housing (140) may include a plurality of protrusions (41a, 41b) arranged on the outer surface of the first side (141-1).

[0080] The housing (140) may include at least one groove (143) corresponding to or opposite to the projection (115) of the bobbin (110). The groove (143) may be formed on the inner surface of the housing (140). The groove (143) may also be expressed as a relief portion or a relief groove. The groove (143) may be formed to avoid spatial interference with the projection (115) of the bobbin (110). At least a portion of the projection (115) of the bobbin (110) may be positioned or inserted into the groove (143) of the housing (140).

[0081] The groove (143) of the housing (140) and the protrusion (115) of the bobbin (110) can serve to suppress the rotation of the bobbin (110) with respect to the optical axis. As the rotation of the bobbin (110) is suppressed, the tilt of the optical axis can be prevented, the impact of the bobbin (110) and the housing (140) due to external impact can be alleviated, the generation of foreign substances or particles caused by impact or collision can be reduced, and deformation or damage of the bobbin (110) or / and the housing (140) can be prevented. In addition, the protrusion (115) of the bobbin (110) can serve as a stopper in the direction perpendicular to the optical axis direction. The protrusion (115) of the bobbin (110) can also be expressed by terms such as “rotation suppression portion,” “stopper,” “catching protrusion,” “shock alleviation portion,” or “buffer portion.” In another embodiment, a groove may be formed in the bobbin (110) and a protrusion may be formed in the housing (140).

[0082] The home portion (143) may include a first home portion (143A) disposed on the third side (141-3) of the housing (140) and corresponding to the first projection (115A) of the bobbin (110), and a second home portion (143B) disposed on the fourth side (141-4) of the housing (140) and corresponding to the second projection (115B) of the bobbin (110).

[0083] The housing (140) may include a mounting portion (144) for placing or accommodating the control unit (310). The mounting portion (144) may be in the form of a groove or a hole. The mounting portion (144) may be formed on any one of the side portions (141-1 to 141-4) of the housing (140) (e.g., 141C). The housing (140) may include a groove (22) corresponding to or opposite to the groove (21) of the bobbin (110). The number of grooves (22) of the housing (140) may be the same as the number of grooves (21) of the bobbin (110). The housing (140) may include a protrusion (147) protruding from the inner surface of the side (141), and the groove (22) may be formed in the protrusion (147). For example, the groove (22) may be formed on the side surface of the protrusion (147). The description of the shape of the groove (21) of the bobbin (110) may be applied or applied to the groove (22) of the housing (140).

[0084] The protrusion (147) may include a first protrusion (147A) protruding from the inner surface of one of the third and fourth sides (141-3, 141-4) of the housing (140) and a second protrusion (147B) protruding from the inner surface of the other of the third and fourth sides (141-3, 141-4) of the housing (140). The groove (22) may include a first groove (22A) formed on the side surface of the first protrusion (147A) and a second groove (22B) formed on the side surface of the second protrusion (147B). In other embodiments, at least one of the groove (21) of the bobbin (110) and the groove (22) of the housing (140) may be omitted. The first protrusion (147A) and the second protrusion (147B) may be positioned closer to the first side (141-1) than to the second side (141-2) of the housing (140). For example, the first protrusion (147A) may be positioned adjacent to the first corner (CA1) of the housing (140), and the second protrusion (147B) may be positioned adjacent to the second corner (CA2) of the housing (140).

[0085] The housing (140) may include at least one stopper (145) formed on the upper part, upper surface, or top of the housing (140). The housing (140) may include at least one stopper (142A) arranged on the lower part (142) of the housing (140). The stopper (142A) may correspond to, face, or overlap with the second stopper (214) of the bobbin (110) in the optical axis direction. The stoppers (114, 214) of the bobbin (110) and the stoppers (142A, 145) of the housing (140) may be expressed as “boss” or “protrusion”.

[0086] The housing (140) may include at least one mounting portion (31) for placing the yoke (90). The mounting portion (31) may be placed on the inner surface of the side portions (141-1 to 141-4) of the housing (140). The mounting portion (31) may have a groove shape. For example, the mounting portion (31) may be formed on the inner surface of the first side portion (141-1) of the housing (140). The mounting portion (31) may include a first mounting portion (31A) positioned at one end of the first side portion (141-1) of the housing (140) and a second mounting portion (31B) positioned at the other end of the first side portion (141-1) of the housing (140). A first coil unit (120A) may be placed between the first mounting portion (31A) and the second mounting portion (31B). The first mounting portion (31A) may be positioned adjacent to one end of the first magnet unit (130A), and the second mounting portion (31B) may be positioned adjacent to the other end of the first magnet unit (130B). In other embodiments, the mounting portion (31) may be omitted.

[0087] The housing (140) may include a step (211) formed at the lower or lower end of the side portions (141-1 to 141-4). The step (211) may be formed at the lower or lower end of the outer surface of the side portions (141-1 to 141-4). The step (211) may contact the lower end of the side plate (302) of the cover member (1300) and guide assembly with the cover member (300). The step (211) of the housing (140) and the lower end of the side plate (302) of the cover member (300) may be fixed or sealed by an adhesive. The housing (140) may include at least one adhesive injection port (211A) formed at the step (211) and for injecting an adhesive.

[0088] The coil (120) may be placed in the housing (140). The coil (120) may be placed or coupled to the circuit board (190). The coil (120) may be electrically connected to the circuit board (190). The coil (120) may be placed to correspond to or face the magnet (130). For example, the coil (120) may be placed to face or overlap the magnet (130) in a direction perpendicular to the optical axis, for example, in the Y-axis direction. The coil (120) may be placed between the housing (140) and the side plate (302) of the cover member (300). The magnet (130) may be placed between the housing (140) and the side plate (302) of the cover member (300).

[0089] The coil (120) may include a first coil unit (120A) corresponding to or opposite the first magnet unit (130A) and a second coil unit (120B) corresponding to or opposite the second magnet unit (130B). The first coil unit (120A) may be disposed on a first side (141-1) of the housing (140), and the second coil unit (120B) may be disposed on a second side (141-2) of the housing (140).

[0090] For example, the coil (120) may be a driving AF (Auto Focus) coil that electromagnetically interacts with a magnet (130). An electromagnetic force may be generated by the interaction between the magnet (130) and the coil (120), and the bobbin (110) may be moved in the direction of the optical axis by this electromagnetic force.

[0091] The AF moving unit (or movable unit) can move in a first direction, for example, upward (+Z-axis direction) or downward (-Z-axis direction) by the electromagnetic force caused by the interaction between the coil (120) and the magnet (130). The AF moving unit (or movable unit) may include a bobbin (110) and a configuration that is mounted on the bobbin (110) and moves together with the bobbin (1110). For example, the AF moving unit may include a bobbin (110) and a magnet (130). In another embodiment, the AF moving unit may further include a lens module (400) coupled with the bobbin (110).

[0092] The coil (120) may have a closed loop shape. The coil (120) may be a winding coil. The coil (120) may include a ring shape having a hole or hollow. For example, the coil (120) may be a coil ring wound or wound clockwise or counterclockwise around an axis perpendicular to the optical axis. The first coil unit (120A) may have a ring shape wound around an axis perpendicular to the outer surface of the first side (141-1) of the housing (140). The second coil unit (120B) may have a ring shape wound around an axis perpendicular to the outer surface of the second side (141-2) of the housing (140).

[0093] The coil (120) may be coupled to a circuit board (190) disposed in a housing (140) or may be mounted on the circuit board (190). For example, the coil (120) may be disposed on a first surface of the circuit board (190). For example, the first surface of the circuit board (190) may be a surface facing the bobbin (110). For example, the coil (120) may be electrically connected to the circuit board (190) by solder or a conductive adhesive. For example, the coil (120) may be electrically connected to a terminal portion (80) of the circuit board (190).

[0094] A driving signal (e.g., a driving current or voltage) may be provided or applied to the coil (120) to generate an electromagnetic force by interaction with the magnet (130). The driving signal applied to the coil (120) may be a direct current signal, but in other embodiments, it may be an alternating current signal or may include a direct current signal and an alternating current signal.

[0095] By controlling the strength or / and polarity (e.g., direction of current flow) of the driving signal applied to the coil (120), and thereby adjusting the strength or / and direction of the electromagnetic force resulting from the interaction between the coil (120) and the first magnet (132), the movement of the AF moving part in the first direction can be controlled, thereby performing the auto-focusing function.

[0096] The first coil unit (120A) and the second coil unit (120B) are not connected to each other. For example, the first coil unit (120A) and the second coil unit (120B) may be spaced apart from each other. The first coil unit (120A) and the second coil unit (120B) may be electrically or conductively separated.

[0097] Each of the first coil unit (120A) and the second coil unit (120B) can be supplied with an independent configuration signal. The first coil unit (120A) can be supplied with a first driving signal, and the second coil unit (120B) can be supplied with a second driving signal.

[0098] For example, the coil (120) may not be placed on the third side (141-3) and the fourth side (141-4) of the housing (140). Also, the magnet (130) may not be placed on the side (or side surface) of the bobbin (110) corresponding to each of the third side (141-3) and the fourth side (141-4) of the housing (140).

[0099] In the embodiment of FIG. 2, the coil (120) includes two coil units (120A, 120B), but in other embodiments, the coil (120) may include three or more coil units. The three or more coil units may not be connected to each other. Two or more coil units may be arranged on at least one of the sides (141-1 to 141-4) of the housing (140). For example, two or more coil units may be arranged on the first side (141-1) of the housing (140), and two or more coil units may be arranged on the second side (141-2) of the housing (140). In this case, the coil units may not be connected in series with each other. An independent driving signal may be supplied to each of the coil units. Alternatively, the coil units may be connected in parallel with each other, and a single driving signal may be supplied to the parallel-connected coil units.

[0100] A circuit board (190) may be placed in a housing (140). The circuit board (190) may be coupled to the housing (140). The circuit board (190) may be coupled to a side of the housing (140) by an adhesive. The circuit board (190) may be coupled to at least one of the side portions (141-1 to 141-4) of the housing (140). The circuit board (190) may include at least one hole (42) for coupling with at least one protrusion (41) of the housing (140). For example, the hole (42) may include two or more holes (42A, 42B).

[0101] The circuit board (190) may include at least one folded portion. The circuit board (190) may include a first substrate (191), a second substrate (192), and a third substrate (193) connecting the first substrate (191) and the second substrate (192). The first substrate (191) may be disposed on a first side (141-1) of the housing (140). The second substrate (192) may be disposed on a second side (141-2) of the housing (140). The third substrate (193) may be disposed on a third side (141-3) of the housing (140). The first coil unit (120A) may be disposed on the first substrate (191), and the second coil unit (120B) may be disposed on the second substrate (192). The control unit (310) may be disposed on any one of the first to third substrates (191 to 193) (e.g., 193). For example, the circuit board (190) may be a printed circuit board or FPCB. In another embodiment, the control unit (310) may be disposed on a camera device (200) other than the auto-focusing driving device (100) or on an optical device (200A).

[0102] The circuit board (190) may include a terminal portion (80) for electrically connecting with an external device or external element. The terminal portion (80) may include a plurality of terminals (B1 to Bn, n being a natural number greater than 2). For example, the plurality of terminals (e.g., B1 to B7) may be arranged on a second surface of the circuit board (190). The second surface of the circuit board (190) may be an opposite surface of the first surface of the circuit board (190). For example, the plurality of terminals (e.g., B1 to B7) may be arranged in a row at the bottom of the second surface of the circuit board (190). In the embodiment, the circuit board (190) includes seven terminals (B1 to B7), but the number of terminals is not limited thereto.

[0103] The circuit board (190) may include a first pad (7A) connected to one end of the first coil unit (120A) and a second pad (7B) connected to the other end of the first coil unit (120A). One end of the first coil unit (120A) may be electrically connected to the first pad (7A) by solder or a conductive adhesive, and the other end of the first coil unit (120A) may be electrically connected to the second pad (7B) by solder or a conductive adhesive.

[0104] The circuit board (190) may include a third pad (8A) connected to one end of the second coil unit (120B) and a fourth pad (8B) connected to the other end of the second coil unit (120B). One end of the second coil unit (120B) may be electrically connected to the third pad (8A) by solder or a conductive adhesive, and the other end of the second coil unit (120B) may be electrically connected to the fourth pad (8B) by solder or a conductive adhesive.

[0105] A first driving signal for driving a first coil unit (120A) may be applied to the first and second pads (7A, 7B) of the circuit board (190). A second driving signal for driving a second coil unit (120B) may be applied to the third and fourth pads (8A, 8B) of the circuit board (190). For example, the first driving signal and the second driving signal may be independent signals. The first coil unit (120A) and the second coil unit (120B) may not be connected to each other. The first and second pads (7A, 7B) of the circuit board (190) may not be conductively or electrically connected to the third and fourth pads (8A, 8B). For example, the circuit board (190) may not include wiring or circuit patterns connecting the first and second pads (7A, 7B) and the third and fourth pads (8A, 8B) to each other.

[0106] The circuit board (190) may include circuit patterns, wiring, or / and pads electrically connected to the position sensor (170), capacitor (195), and pads (7A, 7B, 8A, 8B).

[0107] The position sensor (170) can detect the displacement or position of the bobbin (110) in the optical axis direction. The position sensor (170) can detect the magnetic field of the magnet (130). The position sensor (170) can detect the magnetic field of the first magnet unit (130A). The position sensor (170) can be arranged to correspond to, face, or overlap the first magnet unit (130A). The position sensor (170) can be arranged in the housing (140), which is a fixed part. The position sensor (170) can be arranged or mounted on the circuit board (190). For example, the position sensor (170) can be arranged on the first surface of the circuit board (190). The position sensor (170) can be electrically connected to the circuit board (190). For example, the position sensor (170) can be arranged or mounted on the first board (191). For example, the position sensor (170) may overlap at least a portion of the first magnet unit (130A) in the Y-axis direction. The position sensor (170) may be disposed between the side plate (302) of the cover member (300) and the first magnet unit (130A). The position sensor (170) may be disposed within the hollow portion of the coil (120). In another embodiment, the position sensor (170) may be disposed outside the hollow portion of the coil (120). For example, the position sensor (170) may be disposed within the hollow portion of the first coil unit (120A).

[0108] The position sensor (170) may be implemented as a Hall sensor alone. For example, the Hall sensor may be a magnetic sensing element for position detection. The position sensor (170), which is a Hall sensor, may include two input terminals for inputting power or driving signals and two output terminals for outputting output signals.

[0109] In another embodiment, the position sensor (170) may be a driver IC including a Hall sensor. The position sensor (170) in the form of a driver IC may transmit and receive data with a host using data communication using a protocol, for example, I2C communication. The position sensor (170) in the form of a driver IC may receive power signals (VDD, VSS) from the host, and may transmit and receive a clock signal (SCL) and a data signal (SDA) with the host. Here, the power signal (VSS) may be a ground voltage or 0 [V], and the power signal (VDD) may be a preset voltage for driving the driver IC, and may be a direct current voltage or / and an alternating current voltage. For example, the position sensor (170) in the form of a driver IC may include first to sixth terminals. The first and second terminals of the position sensor (170) may be for receiving a power signal, the third terminal may be for transmitting and receiving a clock signal, and the fourth terminal may be for transmitting and receiving a data signal. In addition, the fifth and sixth terminals of the position sensor (170) may be for supplying a driving signal to the coil (120). The driver IC type position sensor (170) may supply a driving signal to the coil (120) through a circuit board (190).

[0110] The capacitor (195) may be disposed or mounted on the circuit board (190). The capacitor (195) may be disposed on any one of the first to third substrates (191 to 193) of the circuit board (190). For example, the capacitor (195) may be disposed or mounted on the first substrate. The capacitor (195) may be disposed within the hollow portion of the coil (120). For example, the capacitor (195) may be disposed within the hollow portion of the first coil unit (120A). In another embodiment, the capacitor (195) may be located outside the hollow portion of the first coil unit (120A).

[0111] The capacitor (195) can be connected to two terminals of the position sensor (170) to which the power signal or the driving signal is supplied. For example, the capacitor (195) can be connected in series or in parallel to two terminals of the position sensor (190) to which the power signal or the driving signal is supplied. The capacitor (195) can act as a smoothing circuit that removes a ripple component or a high-frequency component included in a power signal supplied from the outside to the position sensor (170), thereby allowing a stable and constant power signal to be supplied to the position sensor (170).

[0112] The cloud member (31, 32) may be placed between the AF moving part and the fixed part. The cloud member (31, 32) may be placed between the bobbin (110) and the housing (140). The cloud member (31, 32) may also be expressed by replacing it with a ball member, a “ball”, a “ball bearing”, or a “sliding member”.

[0113] Additionally, in other embodiments, the cloud member may be implemented as a surface contact bearing or roller capable of surface contact.

[0114] The cloud member (31, 32) can be in contact with the bobbin (110) and the housing (140) and can roll between the bobbin (110) and the housing (140). The bobbin (110) can slide by coming into contact with the cloud member (31, 32). The cloud member (31, 32) can support the movement of the bobbin (110) in the optical axis direction. When the bobbin (110) moves in the optical axis direction, the cloud member (31, 32) can reduce the friction between the bobbin (110) and the housing (140). For the rolling movement of the cloud member (31, 32), the bobbin (110) can be moved in a sliding manner in the optical axis direction by coming into contact with the cloud member (31, 32). The cloud member (931, 32) may be made of a metal material, a plastic material, or a resin material, but is not limited thereto.

[0115] The cloud member (31, 32) may have a circular shape and may have a diameter sufficient to support movement of the bobbin (110) in the optical axis direction. The cloud member (31, 32) may be placed between the first side (141-1) of the housing (140) and the side (or side surface or outer surface) of the bobbin (110) facing the first side.

[0116] The cloud member (31, 32) may include at least one ball member. For example, the cloud member (31, 32) may include a first ball member (31) and a second ball member (32). In other embodiments, the number of ball members may be one or three or more. The first ball member (31) may be arranged between the first groove (21A) of the bobbin (110) and the first groove (22A) of the housing (140). The second ball member (32) may be arranged between the second groove (22A) of the bobbin (110) and the second groove (22B) of the housing (140).

[0117] Each of the first and second ball members (31, 32) may include at least one ball. For example, each of the first and second ball members (31, 32) may include two or more balls (MB1, SB1, SB2, MB2). For example, each of the first and second ball members (31, 32) may include at least one main ball (MB1, MB2) and at least one space ball (SB1, SB2). The diameter of the main balls (MB1, MB2) may be larger than the diameter of the space balls (SB1, SB2). The main balls (MB1, MB2) may be arranged at the uppermost and lowermost sides in the optical axis direction, and the space balls (SB1, SB2) may be arranged between the main balls (MB1, MB2). In another embodiment, the main balls and the space balls may be arranged alternately. The arrangement of the main ball and space ball may be arranged in various forms. In another embodiment, the diameters of the balls included in each of the first and second ball members (31, 32) may be the same.

[0118] Referring to FIG. 7d, the first ball member (31) may be arranged adjacent to one end of the first magnet unit (130A), and the second ball member (32) may be arranged adjacent to the other end of the first magnet unit (130A). In the direction in which the first coil unit (120A) and the first magnet unit (130A) face each other, the first ball member (31) may overlap one end of the first magnet unit (130A). In the direction in which the first coil unit (120A) and the first magnet unit (130A) face each other, the second ball member (32) may overlap the other end of the second magnet unit (130A).

[0119] At least a portion of the cloud member (31, 32) may be positioned between the first magnet unit (130A) and the second magnet unit (130B). For example, at least a portion of the cloud member (31, 32) may overlap the first magnet unit (130A) in a direction in which the first magnet unit (130A) and the second magnet unit (130B) face each other. The cloud member (31, 32) may be positioned closer to the first magnet unit (130A) than to the second magnet unit (130B).

[0120] The ball cover (410) may be placed on the upper part, top part, or upper surface of the bobbin (110) to prevent the ball members (31, 32) from coming off the groove (21) of the bobbin (110). The ball cover (410) may also be expressed as a “cover,” “support,” or “departure prevention member.”

[0121] A part of the ball cover (410) may be placed on the first groove (21A) of the bobbin (110), and another part of the ball cover (410) may be placed on the second groove (21B) of the bobbin (110). The ball cover (410) may cover at least a part of the first groove (21A) and at least a part of the second groove (21B) of the bobbin (110). The ball cover (410) may overlap at least a part of the balls (MB1, SB1, SB, MB2) of the first ball member (31) in the optical axis direction. The ball cover (410) may overlap at least another part of the balls (MB1, SB1, SB, MB2) of the second ball member (32) in the optical axis direction.

[0122] The yoke (90) may be disposed on a fixed portion, for example, a housing (140). The yoke (90) may be disposed to correspond to, face, or overlap the first magnet unit (130A). For example, the yoke (90) may overlap the first magnet unit (130A) in a direction in which the first magnet unit (130A) and the first coil unit (120A) face each other. Between the yoke (90) and the first magnet unit (130A), a force may be applied to press the cloud members (31, 32) by the bobbin (110) and the housing (140). At this time, the pressing force may be defined as a “holding force” or “retention force.” The yoke (90) may be disposed spaced apart from the circuit board (190).

[0123] In the embodiment of FIG. 7d, a repulsive or pushing force may be applied between the yoke (90) and the first magnet unit (130A). This is because an area (e.g., a groove (21)) of the bobbin (110) that contacts the cloud member (31, 32) is positioned further away from the optical axis (OA) or the center of the bobbin (110) than an area (e.g., a groove (22)) of the housing (130) that contacts the cloud member (31, 32). For example, the yoke (90) may be a magnetic body. For example, the yoke (90) may be a magnet. The yoke (90) and the first magnet unit (130A) may be arranged so that their facing surfaces have the same polarity.

[0124] The yoke (90) may include a first yoke (90A) and a second yoke (90B) that are spaced apart from each other. The first yoke (90A) may be positioned on one side of the first coil unit (120A), and the second yoke (90B) may be positioned on the other side of the first coil unit (120A). The first yoke (90A) may overlap one end of the first magnet unit (130A), and the second yoke (90B) may overlap the other end of the first magnet unit (130A).

[0125] Each of the first and second yokes (90A, 90B) may include a first portion that overlaps the first magnet unit (130A) and a second portion that does not overlap the first magnet unit (130A). The area (or length) of the first portion may be greater than the area (or length) of the second portion. In another embodiment, the entire area of ​​each of the first and second yokes (90A, 90B) may overlap the first magnet unit (130A).

[0126] The yoke (90) may face or overlap the cloud member (31, 32) in such a direction that the first coil unit (120A) and the first magnet unit (130A) face each other. This is to increase the pressing force applied to the cloud member. The first yoke (90A) may face or overlap the first ball member (31). The second yoke (90B) may face or overlap the second ball member (32).

[0127] In another embodiment, a force of attraction or attraction may act between the yoke and the first magnet unit. In this case, a region of the bobbin in contact with the rolling element may be positioned closer to the optical axis (OA) or the center of the bobbin (110) than a region of the housing in contact with the rolling element. In this case, the yoke may be made of a metal material that is attracted to a magnet. Or, for example, the yoke may be made of a magnetic metal material. For example, the yoke may be a magnetic body. For example, the yoke may be a magnet, and the yoke and the first magnet unit may be arranged so that their facing surfaces have different polarities.

[0128] Since the cloud member (31, 32) is pressed by the bobbin (110) and the housing (140) through the interaction of the yoke (90) and the first magnet unit (130A), the yoke (90) and the first magnet unit (130A) may be a “pressure unit” or a “pressure member”. When the bobbin (110) moves in the optical axis direction by the pressurization unit, contact can be maintained between the bobbin (110) and the cloud member (31, 32), and between the housing (140) and the cloud member (31, 32).

[0129] The cover member (300) can accommodate the bobbin (110). The cover member (300) can be in the shape of a box with an open bottom and including an upper plate (301) and a side plate (302), and the side plate (302) of the cover member (300) can extend downward from the upper plate (301) of the cover member (300). The shape of the upper plate (301) of the cover member (300) can be a polygon, for example, a square or an octagon, and the cover member (300) can have an opening (303) in the upper plate (301) for exposing a lens or a lens module (400) to external light.

[0130] The terminal portion (80) of the circuit board (190) may include a terminal (B1) connected to the cover member (300). The terminal (B1) may be a ground terminal for anti-static electricity. The terminal (B1) may be an ESD (Electrostatic Discharge) terminal. The terminal portion (80) of the circuit board (190) may include test terminals (B2, B7) for testing AF driving. The test terminals (B2, B7) may be electrically connected to the coil (120). A driving signal may be supplied to the coil (120) through the test terminals (B2, B7). For example, each of the first coil unit (120A) and the second coil unit (120B) may be connected in parallel to the test terminals (B2, B7).

[0131] The control unit (310) can be electrically connected to the first coil unit (120A) and the second coil unit (120B). The control unit (310) can supply a first driving signal to the first coil unit (120A) and a second driving signal to the second coil unit (120B). The control unit (310) can be disposed on the circuit board (190). The control unit (310) can be electrically connected to the circuit board (190).

[0132] The control unit (310) may be electrically connected to the first to fourth pads (7A, 7B, 8A, 8B) of the circuit board (190). The control unit (310) may be electrically connected to the position sensor (170). The output of the position sensor (170) may be transmitted to or output from the control unit (310). The control unit (310) may use the output of the position sensor (170) to adjust or control the first driving signal supplied to the first coil unit (120A) and the second driving signal supplied to the second coil unit (120B). For example, the control unit (310) may be in the form of a driver IC.

[0133] Fig. 8 shows a circuit diagram of a circuit board (190), a control unit (310), a first coil unit (120A), and a second coil unit (120B). The position sensor (170) of Fig. 8 may include two input terminals and two output terminals. The control unit (310) may supply power or a driving signal to the input terminals of the position sensor (170).

[0134] Referring to FIG. 8, the control unit (310) may include terminals (4A, 4B) electrically connected to the output terminals of the position sensor (170). The output signal (HV1) of the position sensor (170) may be input to the terminals (4A, 4B) of the control unit (310).

[0135] The control unit (310) may include terminals (2A to 2D) for data communication (e.g., I2C communication) with an external device or host. The external device or host may be the control unit (830) of the camera module (200) or the control unit (780) of the optical device (200A). The terminals (2A to 2D) of the control unit (310) may be electrically connected to the terminals (B3 to B6) of the circuit board (190).

[0136] The control unit (310) can perform data communication (e.g., I2C) with the host through terminals (B3 to B6) of the circuit board (190). For example, the terminal (B3) of the circuit board (190) may be for transmitting and receiving data (SDA), the terminal (B4) may be for transmitting and receiving a clock signal (SCL), and the terminals (B5, B6) may be for receiving power signals (VDD, VSS). A driving signal (VDD, VSS) for driving the control unit (310) may be supplied from the host through the terminals (B3, B4) of the circuit board (190). The data (SDA) may include control signals for controlling the control unit (310).

[0137] The control unit (310) may include terminals (3A, 3B) from which a first driving signal (ID1) for driving the first coil unit (120A) is output. For example, the terminal (3A) of the control unit (310) may be electrically connected to a first pad (7A) of the circuit board (190), and the terminal (3B) of the control unit (310) may be electrically connected to a second pad (7B) of the circuit board (190). The control unit (310) may supply the first driving signal (ID1) to the first coil unit (120A) through the first and second pads (7A, 7B) of the circuit board (190).

[0138] The control unit (310) may include terminals (3C, 3D) from which a second driving signal (ID2) for driving the second coil unit (120B) is output. For example, the terminal (3C) of the control unit (310) may be electrically connected to the third pad (8A) of the circuit board (190), and the terminal (3D) of the control unit (310) may be electrically connected to the fourth pad (8B) of the circuit board (190). The control unit (310) may supply the second driving signal (ID2) to the second coil unit (120B) through the third and fourth pads (8A, 8B) of the circuit board (190).

[0139] The control unit (310) can convert the output signal (HV1) of the position sensor (170) into analog-to-digital and generate a code value (or “digital value”), and generate driving signals (ID1, ID2) for driving the first and second coil units (120A, 120B) based on the result of comparing the code value with the target value. The control unit (310) can store an algorithm, program, or function for generating the driving signals (ID1, ID2) using the code value.

[0140] The control unit (310) may include an analog-to-digital converter that converts the output signal (HV1) of the position sensor (170) into analog-to-digital and generates a code value (or “digital value”). The control unit (310) may include a digital processor that generates a control signal for driving the first and second coil units (120A, 120B) based on a result of comparing the code value with a target value. The control unit (310) may include a driver (or amplifier) ​​that generates a first driving signal (ID1) and a second driving signal (ID2) based on the control signal. The target value may be a reference code value regarding the output of the position sensor (170) corresponding to a target position or point of the AF moving unit. At this time, the reference code value may be preset through calibration regarding the correlation between the position of the AF moving unit and the output of the position sensor (170). The reference code value may be stored in the control unit (310) or may be stored in a separate memory.

[0141] In Fig. 8, the control unit (310) can generate a first driving signal (ID1) and a second driving signal (ID2) using an output signal (HV1) of one position sensor (170). The first driving signal (ID1) and the second driving signal (ID2) may be independent signals. The control unit (310) can generate a first driving signal (ID1) using the output signal (HV1) of the position sensor (170) and supply the first driving signal (ID1) to the first coil unit (120A) through two terminals (3A, 3B), and can generate a second driving signal using the output signal (HV1) and supply the second driving signal (ID2) to the second coil unit (120B) through the other two terminals (3C, 3D).

[0142] In another embodiment, the first driving signal (ID1) and the second driving signal (ID2) may be the same signal. That is, the control unit (310) may supply the same driving signal to the first coil unit (120A) through two terminals (3A, 3B) and may supply the same driving signal to the second coil unit (120B) through the other two terminals (3C, 3D).

[0143] In another embodiment, the control unit (310) may generate a driving signal (ID1=ID2) using the output signal (HV1) of the position sensor (170), and may supply the generated driving signal to the first coil unit (120A) and the second coil unit (120B) through a single terminal. For example, in another embodiment, the terminals (3C, 3D) of the control unit (310) may be omitted, the terminals (8A, 8B) of the circuit board (190) may be electrically connected to the terminals (3A, 3B) of the control unit (310), and both ends of the first coil unit (120A) and both ends of the second coil unit (120B) may be connected in parallel to the terminals (3A, 3B) of the control unit (310). In another embodiment, the first and second pads (7A, 7B) and the third and fourth pads (8A, 8B) of the circuit board (190) may be connected in parallel to each other. The first and second pads (7A, 7B) and the third and fourth pads (8A, 8B) may be connected in parallel to the pads (3A, 3B) of the control unit (310). The driving signal (ID1) output from the terminals (3A, 3B) of the control unit (310) may be supplied to the first and second pads (7A, 7B) of the circuit board (190) and may be supplied to the third and fourth pads (8A, 8B) of the circuit board (190).

[0144] FIG. 9 shows a circuit diagram of a circuit board (190), a control unit (310), a first coil unit (120A), and a second coil unit (120B) according to another embodiment.

[0145] The embodiment of FIG. 9 may further include a position sensor (180). In the embodiment of FIG. 9, the position sensor (170) is defined as a “first position sensor” and the position sensor (180) is defined as a “second position sensor.” The description of the position sensor (170) of FIG. 8 applies or is analogically applied to the first position sensor (170) of FIG. 9. The second position sensor (180) may be a Hall sensor. The second position sensor may include two input terminals and two output terminals that output an output signal (HV2).

[0146] The control unit (310) can supply power or a driving signal to the input terminals of the second position sensor (180). The second position sensor (180) can detect the magnetic field of the second magnet unit (130B) and output an output signal (HV2) through the output terminals. The second position sensor (180) can be arranged to correspond to, face, or overlap with the first magnet unit (130A). The description of the first position sensor (170) can be applied to or analogized with the second position sensor (180).

[0147] The control unit (310) may include terminals (4C, 4D) electrically connected to the output terminals of the second position sensor (180). The output signal (HV2) of the second position sensor (180) may be input to the terminals (4C, 4D) of the control unit (310). The second position sensor (180) may be disposed on a circuit board (190) and may be electrically connected to the circuit board (190). The second position sensor (180) may be disposed on a second substrate (192). The second position sensor (180) may be disposed within the hollow portion of the second coil unit (120B). In another embodiment, the second position sensor (180) may be disposed outside the hollow portion of the second coil unit (120B).

[0148] The control unit (310) can generate a first driving signal (ID1) using the output signal (HV1) of the first position sensor (170). The control unit (310) can generate a second driving signal (ID2) using the output signal (HV2) of the second position sensor (180).

[0149] The control unit (310) can convert the output signal (HV1) into analog-to-digital and generate a first code value (or “first digital value”), and can convert the output signal (HV2) into analog-to-digital and generate a second code value (or “second digital value”). The control unit (310) can generate a first driving signal (ID1) for driving the first coil unit (120A) using the first code value, and can generate a second driving signal (ID2) for driving the second coil unit (120B) using the second code value. The control unit (310) can store an algorithm, a program, or a function for generating driving signals (ID1, ID2) for driving the first and second coil units (120A, 120B) using the first code value and the second code value.

[0150] In another embodiment, the control unit (310) may generate a first driving signal (ID1) using the first code value and the second code value, and may generate a second driving signal (ID1) using the first code value and the second code value.

[0151] In another embodiment, the control unit (310) can generate a driving signal to drive the first and second coil units (120A, 120B) through output signals (HV1, HV2), supply the generated driving signal to the first coil unit (120A) through terminals (3A, 3B), and supply the generated driving signal to the second coil unit (120A) through terminals (3C, 3D).

[0152] Since the embodiment of FIG. 9 uses two position sensors, compared to the embodiment of FIG. 8, it is possible to correct or compensate for imbalance in the posture of the bobbin or misalignment of the bobbin during AF operation, and improve the performance of AF feedback operation.

[0153] FIG. 10 shows a circuit diagram of a circuit board (190), a control unit (310), a first coil unit (120A), and a second coil unit (120B) according to another embodiment.

[0154] In FIG. 10, each of the first position sensor (170A) and the second position sensor (180A) may be a driver IC including a Hall sensor. The first position sensor (170A) may include a first Hall sensor and a first driver, and the second position sensor (180A) may include a second Hall sensor and a second driver. At this time, the first Hall sensor may detect the magnetic field of the first magnet unit (130A) and output a first output signal. The first driver may generate a first driving signal for driving the first coil unit (120A) using the first output signal of the first Hall sensor (ID1). In addition, the second Hall sensor may detect the magnetic field of the second magnet unit (130B) and output a second output signal. The second driver may generate a second driving signal for driving the second coil unit (120B) using the second output signal of the second Hall sensor (ID2).

[0155] The description of the control unit (310) in FIG. 9 generating the first driving signal (ID1) using the output signal (HV1) of the first position sensor (170) can be applied to or analogized to the first driver in FIG. 10. In addition, the description of the control unit (310) in FIG. 9 generating the second driving signal (ID2) using the output signal (HV2) of the second position sensor (180) can be applied to or analogized to the second driver in FIG. 10.

[0156] For example, using data communication using a protocol, for example, I2C communication, each of the first driver and the second driver can receive a clock signal (SCL), a data signal (SDA), and a power or power signal (VCC, GND) from the host (700). For example, the host (700) may be a control unit (830) of a camera device (200) or a control unit (780) of an optical device (200A).

[0157] The first position sensor (170A) can detect the magnetic field of the first magnet unit (130A), and the second position sensor (180A) can detect the magnetic field of the second magnet unit (130B). The first position sensor (170A) can generate a first driving signal for driving the first coil unit (120A) using the result of detecting the magnetic field of the first magnet unit (130A). The second position sensor (180A) can generate a second driving signal for driving the second coil unit (120B) using the result of detecting the magnetic field of the second magnet unit (130B).

[0158] The first position sensor (170A) may include terminals (P1, P2) for inputting power signals (VDD, VSS), a terminal (P3) for transmitting and receiving data, and a terminal (P4) for transmitting and receiving a clock signal (SCL). The terminals (P1 to P4) of the first position sensor (170A) may be electrically connected to terminals (B3 to B6) of a circuit board (190). The circuit board (190) may include first wires (or circuit patterns) that connect the terminals (P1 to P4) of the first position sensor (170A) and the terminals (B3 to B6) of the circuit board (190) to each other.

[0159] Additionally, the first position sensor (170A) may include terminals (P5, P6) for supplying a first drive signal (ID1) to the first coil unit (120A). The first drive signal (ID1) may be output from the terminals (P5, P6) of the first position sensor (170A).

[0160] A terminal (P5) of a first position sensor (170A) can be electrically connected to a first pad (7A) of a circuit board (190), and a terminal (P6) of the first position sensor (170A) can be electrically connected to a second pad (7B) of the circuit board (190). The first position sensor (170A) can supply a first driving signal to the first and second pads (7A, 7B) of the circuit board (190).

[0161] The second position sensor (180A) may include terminals (Q1, Q2) for inputting power signals (VDD, VSS), a terminal (Q3) for transmitting and receiving data, and a terminal (Q4) for transmitting and receiving a clock signal (SCL). The terminals (Q1 to Q4) of the second position sensor (180A) may be electrically connected to terminals (B3 to B6) of a circuit board (190). The circuit board (190) may include second wires (or circuit patterns) that connect the terminals (Q1 to Q4) of the second position sensor (180A) and the terminals (B3 to B6) of the circuit board (190) to each other. For example, each of the second wires may be electrically or conductively connected to a corresponding one of the first wires.

[0162] Additionally, the second position sensor (180A) may include terminals (Q5, Q6) for supplying a second drive signal (ID2) to the second coil unit (120B). The second drive signal (ID2) may be output from the terminals (Q5, Q6) of the second position sensor (180A).

[0163] A terminal (Q5) of the second position sensor (180A) can be electrically connected to a third pad (8A) of a circuit board (190), and a terminal (Q6) of the second position sensor (180A) can be electrically connected to a fourth pad (8B) of the circuit board (190). The second position sensor (180A) can supply a second driving signal to the third and fourth pads (8A, 8B) of the circuit board (190).

[0164] Each of the first position sensor (170A) and the second position sensor (180A) can perform data communication with the host (700) using terminals (B3, B4, B5, B6) of the circuit board (190).

[0165] Data of the first position sensor (170A) and data of the second position sensor (180A) can be transmitted and received in a time-division manner through terminals (B3, B4) of the circuit board (190). In data communication between the host (700) and the first and second position sensors (170A, 180A), the host (700) may correspond to a master, the first position sensor (170A) may correspond to a first slave, and the second position sensor (180A) may correspond to a second slave. Different addresses or identification codes may be assigned to the first and second position sensors (170A, 180A). Data can be transmitted and received in a time-division manner between each of the first and second position sensors (170A, 180A) and the host (700) through a single line (e.g., a line connected to terminal (B3)).

[0166] The first driving signal (ID1) generated from the first position sensor (170A) and the second driving signal (ID2) generated from the second position sensor (170B) may be independent signals. The host (700) may transmit commands to the first position sensor (170A) and the second position sensor (180A) to control or adjust the first driving signal (ID1) of the first position sensor (170A) and the second driving signal (ID2) of the second position sensor (170B). For example, the host (700) may time-divisionally control the first driving signal (ID1) output from the first position sensor (170A) and the second driving signal (ID2) output from the second position sensor (180A).

[0167] In a comparative example (hereinafter referred to as “first comparative example”) in which one coil unit and one magnet unit are used for AF driving, a driver IC supplies a driving signal to the coil unit through one channel. If the size of the image sensor increases and the weight of the lens module increases for high resolution, the electromagnetic force of the first comparative example may be insufficient. In the first comparative example, the sizes of the magnet and the coil may increase to supplement the insufficient electromagnetic force, thereby increasing the size of the auto-focusing driving device, which may restrict the freedom of design for the arrangement of other configurations.

[0168] In a comparative example (hereinafter referred to as “second comparative example”) in which two coil units connected in series with two magnet units are used for AF driving, a driving signal can be supplied to the coil units through one channel. In comparative example 2, since two coil units are connected in series, the resistance of the AF coil may increase, thereby reducing the electromagnetic force between the magnet unit and the coil units.

[0169] In the embodiment, the first coil unit (120A) and the second coil unit (120B) are not connected in series, and compared to the second comparative example, the resistance of the first coil unit (120A) (or the second coil unit (120B)) does not increase.

[0170] In an embodiment, a first driving signal may be supplied to a first coil unit (120A) and a second driving signal may be supplied to a second coil unit (120B) via two channels. In this case, one of the two channels may be the first and second pads (7A, 7B) of the circuit board (190), and the other of the two channels may be the third and fourth pads (8A, 8B) of the circuit board (190). The meaning of a channel may mean a passage or path through which a driving signal is supplied.

[0171] In the embodiment, the first coil unit (120A) and the second coil unit (120B) are not connected to each other by the wiring or circuit pattern of the circuit board (190). The first coil unit (120A) and the second coil unit (120B) may be electrically connected to the circuit board (190) through separate channels. That is, in the embodiment, the resistance of the AF coil for AF driving may be lowered, and the current flowing in the AF coil may be increased, so that the electromagnetic force for AF driving may be improved.

[0172] In the embodiment, the degree of freedom in the use of the current of the driving signal and the resistance of the channel can be increased in each channel, and the driving force (or Lorentz force) by the interaction between the magnet unit and the coil unit can be increased.

[0173] In the embodiment, since the electromagnetic force (or Lorentz force) is increased by the interaction between the magnet unit and the coil unit, a heavy, large-diameter lens module can be driven, and a camera device having a high resolution can be implemented.

[0174] In FIGS. 1 to 10, the first coil unit (120A) includes a first coil body in a ring shape, and a first driving signal is supplied to the first coil body, and the second coil unit (120B) includes a second coil body in a ring shape, and a second driving signal is supplied to the second coil body. However, in other embodiments, the first coil unit (120A) may include two or more first coil bodies, and the second coil unit (120B) may include two or more second coil bodies. Each of the first coil bodies may be ring-shaped, and the first coil bodies may overlap each other in a direction in which the first coil unit and the second coil unit face each other. Each of the second coil bodies may be ring-shaped, and the second coil bodies may overlap each other in a direction in which the first coil unit and the second coil unit face each other. The driver IC (310) of FIGS. 8 and 9 can supply first driving signals to the first coil bodies, and the driver IC (310) can supply second driving signals to the second coil bodies.

[0175] At this time, the driver IC (310) may include two terminals connected to each of the first coil bodies, and may supply a first driving signal to each of the first coil bodies through the two terminals. In addition, the circuit board (190) may include a plurality of pads to be connected to the two terminals of the driver IC. One end of each of the first coil bodies may be connected to one of two corresponding pads among the plurality of pads of the circuit board (190), and the other end of each of the first coil bodies may be connected to the other of the two corresponding pads among the plurality of pads of the circuit board (190).

[0176] In addition, the driver IC (310) may include two other terminals connected to each of the second coil bodies, and may supply a second driving signal to each of the second coil bodies through the other two terminals. In addition, the circuit board (190) may include another plurality of pads for connecting to the other two terminals of the driver IC. One end of each of the second coil bodies may be connected to one of two corresponding pads among the other plurality of pads of the circuit board (190), and the other end of each of the second coil bodies may be connected to the other of the two corresponding pads among the other plurality of pads of the circuit board (190).

[0177] Additionally, the first position sensor (170A) of FIG. 10 can supply a first driving signal to each of two or more first coil bodies, and the second position sensor (180A) can supply a second driving signal to each of two or more second coil bodies.

[0178] Meanwhile, the auto-focusing driving device according to the above-described embodiment can be used in various fields, for example, a camera module, a camera, a camera device, or an optical device.

[0179] For example, the auto-focusing driving device (100) according to the embodiment may be included in an optical instrument that forms an image of an object in space by using the characteristics of light such as reflection, refraction, absorption, interference, and diffraction, and aims to increase the visual acuity of the eye, or to record and reproduce an image using a lens, or to optically measure, propagate or transmit an image, etc. For example, the optical instrument according to the embodiment may be a cell phone, a mobile phone, a smart phone, a mobile device, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), a navigation system, etc., but is not limited thereto, and any device for taking a video or a photo may be used.

[0180] Fig. 11 shows an exploded perspective view of a camera device (200) according to an embodiment.

[0181] Referring to FIG. 11, the camera device (200) may include a lens module (400), an auto-focusing driving device (100), a circuit board (800), and an image sensor (810).

[0182] The camera device (200) may further include a filter (610) positioned between the lens module (400) and the image sensor (810). For example, the filter (610) may be placed or mounted on the housing (140). For example, a mounting groove may be provided on the lower surface of the housing (140) for mounting or mounting the filter (610). In another embodiment, the camera device (200) may include a sensor base (not shown) positioned between the housing (140) and the circuit board (800) for mounting the filter. In this case, the sensor base may include a mounting portion for mounting the filter (610). The housing (140) may be coupled, attached, or fixed to the upper surface of the circuit board (800) by an adhesive member (not shown).

[0183] The lens module (400) may include a lens and / or a lens barrel, and may be mounted or coupled to a bobbin (110) of an auto-focusing driving device (100). For example, the lens module (400) may include one or more lenses and a lens barrel that accommodates the lenses. However, the configuration of the lens module (400) is not limited to a lens barrel, and any holder structure capable of supporting one or more lenses may be used. The lens module (400) may be coupled to the auto-focusing driving device (100) and may move together with the auto-focusing driving device (100). For example, the lens module (400) may be screw-coupled to the bobbin (110), as an example. The lens module (400) may be coupled to the bobbin (110) by an adhesive (not shown), as an example. Meanwhile, light passing through the lens module (400) may pass through the filter (610) and be irradiated to the image sensor (810). In another embodiment, the camera device (200) may include an optical element, an optical module, a prism, a diffractive optical element (DOE), or an image sensor module instead of the lens module (400).

[0184] The filter (610) may serve to block light of a specific frequency band from passing through the lens barrel (400) from entering the image sensor (810). For example, the filter (610) may be an infrared blocking filter, but is not limited thereto.

[0185] The circuit board (800) may be placed at the bottom of the auto-focusing driving device (100), and the image sensor (810) may be placed or mounted on the circuit board (800). The image sensor (810) may receive an image included in light incident through the lens module (400) and convert the received image into an electrical signal.

[0186] The circuit board (800) may be electrically connected to the circuit board (190) of the auto-focusing driving device (100). For example, the circuit board (800) may include terminals (801) that are electrically connected to the terminals (B1 to B7) of the circuit board (190) of the auto-focusing driving device (100). The image sensor (810) may face or overlap the lens module (400) in the optical axis direction. The image sensor (810) may output the irradiated light as an image. The image sensor (810) may be, for example, a CCD (charge coupled device), a MOS (metal oxide semiconductor), a CPD, and a CID. However, the type of the image sensor is not limited thereto. The image sensor (810) may be spaced apart from the filter (610) so as to face the filter (610) in the optical axis direction.

[0187] The camera device (200) may further include a motion sensor (820). The motion sensor (820) may be placed on the circuit board (800) and electrically connected to the circuit board (800). The motion sensor (820) outputs rotational angular velocity information due to the movement of the camera module (200). The motion sensor (820) may be implemented as a two-axis, three-axis, or five-axis gyro sensor, or an angular velocity sensor.

[0188] The camera device (200) may further include a control unit (830) disposed on the circuit board (800). The control unit (830) may be electrically connected to the circuit board (800). The control unit (830) may be electrically connected to the motion sensor (820). The camera device (200) may include a connector (840) that is electrically connected to the circuit board (800) and includes a port for electrically connecting to an external device. The connector (840) may be a part of the circuit board (800).

[0189] Fig. 12 shows a perspective view of an optical device (200A) according to an embodiment, and Fig. 13 shows a configuration diagram of the optical device (200A) shown in Fig. 12.

[0190] Referring to FIGS. 12 and 13, the optical device (200A) may include a body (850), a wireless communication unit (710), an A / V input unit (720), a sensing unit (740), an input / output unit (750), a memory unit (760), an interface unit (770), a control unit (780), and a power supply unit (790).

[0191] The body (850) illustrated in FIG. 12 is in the form of a bar, but is not limited thereto, and may have various structures such as a slide type, folder type, swing type, or swivel type in which two or more sub-bodies are connected to enable relative movement.

[0192] The body (850) may include a case (casing, housing, cover, etc.) that forms the exterior. For example, the body (850) may be divided into a front case (851) and a rear case (852). Various electronic components of the terminal may be built into the space formed between the front case (851) and the rear case (852).

[0193] The wireless communication unit (710) may be configured to include one or more modules that enable wireless communication between the optical device (200A) and a wireless communication system or between the optical device (200A) and a network in which the optical device (200A) is located. For example, the wireless communication unit (710) may be configured to include a broadcast reception module (711), a mobile communication module (712), a wireless Internet module (713), a short-range communication module (714), and a location information module (715).

[0194] The A / V (Audio / Video) input unit (720) is for inputting audio signals or video signals and may include a camera (721) and a microphone (722), etc.

[0195] The camera (721) may include a camera device (200) according to an embodiment.

[0196] The sensing unit (740) can detect the current state of the optical device (200A), such as the open / close state of the optical device (200A), the position of the optical device (200A), the presence or absence of user contact, the orientation of the optical device (200A), acceleration / deceleration of the optical device (200A), and generate a sensing signal to control the operation of the optical device (200A). For example, if the optical device (200A) is in the form of a slide phone, it can sense whether the slide phone is open or closed. In addition, it is responsible for sensing functions related to whether power is supplied to the power supply unit (790), whether the interface unit (770) is connected to an external device, and the like.

[0197] The input / output unit (750) is for generating input or output related to visual, auditory, or tactile senses. The input / output unit (750) can generate input data for controlling the operation of the optical device (200A) and can also display information processed in the optical device (200A).

[0198] The input / output unit (750) may include a key pad unit (730), a display module (751), an audio output module (752), and a touch screen panel (753). The key pad unit (730) may generate input data through key pad input.

[0199] The display module (751) may include a plurality of pixels whose colors change according to an electrical signal. For example, the display module (751) may include at least one of a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, and a 3D display.

[0200] The audio output module (752) can output audio data received from the wireless communication unit (710) in a call signal reception mode, call mode, recording mode, voice recognition mode, or broadcast reception mode, or can output audio data stored in the memory unit (760).

[0201] The touch screen panel (753) can convert a change in electrostatic capacity caused by a user's touch on a specific area of ​​the touch screen into an electrical input signal.

[0202] The memory unit (760) may store programs for processing and controlling the control unit (780), and may temporarily store input / output data (e.g., phone book, messages, audio, still images, photographs, videos, etc.). For example, the memory unit (760) may store images captured by the camera (721), such as photographs or videos.

[0203] The interface unit (770) serves as a passage connecting to an external device connected to the optical device (200A). The interface unit (770) receives data from the external device, supplies power, and transmits it to each component inside the optical device (200A), or allows data inside the optical device (200A) to be transmitted to the external device. For example, the interface 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 equipped with an identification module, an audio I / O (Input / Output) port, a video I / O (Input / Output) port, and an earphone port.

[0204] The control unit (controller, 780) can control the overall operation of the optical device (200A). For example, the control unit (780) can perform related control and processing for voice calls, data communications, video calls, etc.

[0205] The control unit (780) may be equipped with a multimedia module (781) for multimedia playback. The multimedia module (781) may be implemented within the control unit (780) or may be implemented separately from the control unit (780).

[0206] The control unit (780) can perform pattern recognition processing to recognize handwriting input or drawing input performed on the touch screen as characters and images, respectively.

[0207] The power supply unit (790) can supply power required for the operation of each component by receiving external power or internal power under the control of the control unit (780).

[0208] The features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention, and are not necessarily limited to just one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment can be combined or modified in other embodiments by those skilled in the art to which the embodiments pertain. Therefore, the contents related to such combinations and modifications should be construed as being included within the scope of the present invention.

[0209] The embodiment can be used in an autofocusing driving device, a camera device, and an optical device that can improve electromagnetic force for AF driving.

Claims

1. Housing; A bobbin disposed within the housing; A ball member disposed between the bobbin and the housing; A circuit board disposed in the above housing; A magnet including a first magnet unit and a second magnet unit arranged on the bobbin and positioned opposite to each other; and A coil is disposed on the circuit board and includes a first coil unit facing the first magnet unit and a second coil unit facing the second magnet unit, An auto-focusing driving device in which a first driving signal for driving the first coil unit is applied to the first coil unit, and a second driving signal for driving the second coil unit is applied to the second coil unit.

2. In paragraph 1, The circuit board includes first and second pads electrically connected to the first coil unit and third and fourth pads electrically connected to the second coil unit, An auto-focusing driving device wherein the first driving signal is applied to the first and second pads, and the second driving signal is applied to the third and fourth pads.

3. In paragraph 1, An auto-focusing driving device in which the first coil unit and the second coil unit are not connected to each other.

4. In paragraph 1, An auto-focusing driving device wherein the first and second pads of the circuit board are not electrically connected to the third and fourth pads.

5. In paragraph 1, An auto-focusing driving device comprising a control unit that supplies the first driving signal and the second driving signal.

6. In paragraph 5, An auto-focusing driving device in which the control unit is disposed on the circuit board and electrically connected to the circuit board.

7. In paragraph 5, A position sensor is disposed on the circuit board and detects displacement of the bobbin, An auto-focusing driving device in which the output of the above position sensor is transmitted to the above control unit.

8. In paragraph 2, The circuit board includes first to fourth terminals electrically connected to the control unit, The above control unit is an auto-focusing driving device which is a driver IC that performs data communication with the host through the first to fourth terminals.

9. In paragraph 2, A position sensor is disposed on the circuit board and includes a position sensor for detecting displacement of the bobbin, The position sensor includes a first sensor that detects the magnetic field of the first magnet unit and a second sensor that detects the magnetic field of the second magnet unit, The first sensor generates the first driving signal, The second sensor is an auto-focusing driving device that generates the second driving signal.

10. In paragraph 9, An auto-focusing driving device in which the first sensor supplies the first driving signal to the first pad and the second pad of the circuit board, and the second sensor supplies the second driving signal to the third pad and the fourth pad of the circuit board.

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