Camera device and optical device including same

Abstract

An embodiment comprises: a fixed unit; a movable unit including an image sensor; a coil for moving the movable unit about a first axis or a second axis perpendicular to the first axis; a position sensor for detecting the displacement of the movable unit; and a control unit for controlling a driving signal of the coil, wherein the position sensor comprises: a first sensor disposed in a first quadrant of a coordinate plane having an origin at the intersection of the first axis and the second axis; a second sensor disposed in a fourth quadrant of the coordinate plane; a third sensor disposed in a second quadrant of the coordinate plane; and a fourth sensor disposed in a third quadrant of the coordinate plane, a first distance between the first axis and each of the first to fourth sensors is different from a second distance between the second axis and each of the first to fourth sensors, and the control unit comprises a correction function for orthogonalizing the arrangement of the first sensor and the fourth sensor and the arrangement of the second sensor and the third sensor.

Description

Camera device and optical device including the same

[0001] The embodiment relates to a camera device and an optical device including the same.

[0002] A camera device is a device that captures a subject as a photograph or video, and is mounted on portable devices, drones, vehicles, etc. To improve image quality, the camera device may have image stabilization (IS) functions, such as Optical Image Stabilizer (OIS), and autofocus (AF) functions to correct or prevent image shaking caused by user movement.

[0003] The embodiment provides a camera device and an optical device including the same, wherein the processing load of the processing unit can be reduced because calibration is easy and simple.

[0004] A camera device according to an embodiment comprises: a fixed part; a moving part including an image sensor; a coil that moves the moving part around a first axis or a second axis perpendicular to the first axis; a position sensor that detects the displacement of the moving part; and a control part that controls a driving signal of the coil.

[0005] The above position sensor includes a first sensor positioned in the first quadrant of a coordinate plane where the intersection point of the first axis and the second axis is the origin, a second sensor positioned in the fourth quadrant of the coordinate plane, a third sensor positioned in the second quadrant of the coordinate plane, and a fourth sensor positioned in the third quadrant of the coordinate plane, wherein the first distance between the first axis and each of the first to fourth sensors is different from the second distance between the second axis and each of the first to fourth sensors, and the control unit includes a correction function for orthogonalizing the arrangement of the first sensor and the fourth sensor and the arrangement of the second sensor and the third sensor, wherein the correction function includes the first distance, the second distance, the sum of the first difference and the second difference, and a value obtained by subtracting the first difference from the second difference, wherein the first difference is the difference between the output of the first sensor and the output of the fourth sensor, and the second difference is the difference between the output of the second sensor and the output of the third sensor.

[0006] The above correction function includes mathematical formula 1, and

[0007]

[0008] k is a correction vector, a is the first distance, b is the second distance, DA1 is the first difference, and DA2 may be the second difference.

[0009] The above control unit calculates displacement values ​​corresponding to the outputs of the first to fourth sensors using mathematical formula 2, and

[0010]

[0011] SV is the above displacement value, ING1 is a(-DA1+DA2), and ING2 can be b(DA1+DA2).

[0012] The camera device comprises: a first magnet unit and a second magnet unit spaced apart in a direction parallel to the second axis on a first side of either the moving part or the fixed part; and a third magnet unit and a fourth magnet unit spaced apart in a direction parallel to the second axis on a second side of either the moving part or the fixed part, wherein the first sensor detects the first magnet unit, the second sensor detects the second magnet unit, the third sensor detects the third magnet unit, and the fourth sensor detects the fourth magnet unit.

[0013] The above coil may include first to fourth coil units corresponding to the first to fourth magnet units in a direction parallel to the first axis.

[0014] The above control unit can store a calibration value obtained using mathematical formulas 1 and 2 that correspond to the displacement of the moving unit.

[0015] The control unit can set a target value, compare the displacement value with the target value, and adjust or control the driving signals of the first to fourth coil units so that the displacement value converges to or matches the target value.

[0016] The camera device includes a rolling member disposed between the fixed part and the moving part, and the rolling member may include first and second balls disposed to overlap with the first axis; and third and fourth balls disposed to overlap with the second axis. The first distance may be smaller than the second distance. The first to fourth sensors are symmetrically arranged with respect to the first axis and the second axis, and a first straight line connecting the center of the first sensor and the center of the fourth sensor and a second straight line connecting the center of the second sensor and the center of the third sensor are not orthogonal.

[0017] In the embodiment, the linearity of the interrelationship between the output value of the OIS position sensor and the displacement of the OIS moving part can be improved, and calibration between the output value of the OIS position sensor and the displacement of the OIS moving part can be performed easily and simply.

[0018] In the embodiment, since calibration is easy and simple, the processing load of the processing unit (e.g., CPU) can be reduced and power consumption can be reduced.

[0019] FIG. 1 is a perspective view of a camera device according to an embodiment.

[0020] Figure 2 is an exploded perspective view of the camera device of Figure 1.

[0021] FIG. 3 is a perspective view of a camera device excluding the cover member.

[0022] FIG. 4 shows a stopper, bobbin, housing, magnets, circuit board, coil, and ball member.

[0023] Figure 5 shows a housing, an OIS magnet, a circuit board, a position sensor, and a coil.

[0024] FIG. 6 shows an image sensor part, a tilting guide part, a magnetic body, and an OIS ball member.

[0025] FIG. 7 is a lower perspective view of an image sensor part, a tilting guide part, a magnetic body, and an OIS ball member.

[0026] Figure 8 shows the base and the magnetic material.

[0027] Figure 9 shows a base, a circuit board, an OIS coil, a magnetic material, a position sensor, and a temperature sensor.

[0028] FIG. 10a is a cross-sectional view of the camera device in the AB direction of FIG. 3.

[0029] FIG. 10b is a cross-sectional view of the camera device in the CD direction of FIG. 3.

[0030] FIG. 10c is a cross-sectional view of the camera device in the EF direction of FIG. 3.

[0031] FIG. 10d is a cross-sectional view of a camera device including a lens module.

[0032] Figure 11 is a functional block diagram of the control unit.

[0033] FIG. 12a is intended to illustrate the first axis tilting of a camera device.

[0034] FIG. 12b is intended to illustrate the second axis tilting of the camera device.

[0035] FIG. 13 shows a tilting guide section, first and second coil units, first and second magnet units, and first and second sensors.

[0036] FIG. 14 shows the arrangement of the first to fourth sensors on a coordinate plane including the first axis and the second axis.

[0037] Figure 15a shows the trajectory of the reference point of the OIS moving part according to the tilt of the OIS moving part.

[0038] FIG. 15b shows the outputs of the first to fourth sensors corresponding to the trajectory of the reference point of the OIS moving part.

[0039] FIG. 16 shows a flowchart regarding a method for calibrating the correlation between the displacement of the OIS moving part and the outputs of the first to fourth sensors according to an embodiment.

[0040] FIG. 17 shows the calibration values ​​corresponding to the displacement of the OIS moving part and the code values ​​of the first to fourth sensors.

[0041] Figure 18a shows graphs of the first difference and the second difference, respectively, according to the displacement of the OIS moving part.

[0042] FIG. 18b is a graph showing the first difference and the second difference corresponding to the displacement of the OIS moving part on a coordinate plane.

[0043] FIG. 19a is a graph showing the first difference and the second difference corresponding to the displacement of the OIS moving part on a coordinate plane.

[0044] FIG. 19b is a graph showing the first and second component values ​​according to the displacement of the OIS moving part on a coordinate plane.

[0045] Figure 20 shows the calibration value according to the displacement of the OIS moving part.

[0046] FIG. 21 shows a feedback control method for an OIS moving part according to an embodiment.

[0047] FIG. 22a shows a perspective view of an optical device according to an embodiment.

[0048] FIG. 22b shows a perspective view of an optical device according to another embodiment.

[0049] FIG. 23 shows a configuration diagram of the optical device illustrated in FIG. 22a and FIG. 22b.

[0050] The following describes an embodiment of the present invention that can specifically realize the above objectives, with reference to the attached drawings.

[0051] In the description of the embodiments, where it is stated that an element is formed "on or under," the term "on or under" includes both cases where two elements are in direct contact with each other and cases where one or more other elements are positioned indirectly between the two elements. Furthermore, when expressed as "on or under," it may include the meaning of a downward direction as well as an upward direction relative to a single element.

[0052] Additionally, relational terms used below, such as “first” and “second,” “upper / superior / above,” and “lower / subordinate / below,” do not necessarily require or imply any physical or logical relationship or order between such entities or elements, and may be used solely to distinguish one entity or element from another. Furthermore, the same reference number indicates the same element through the description of the drawings.

[0053] Furthermore, terms such as "include," "constitute," or "have" as described above, unless specifically stated otherwise, imply that the relevant component may be inherent; therefore, they should be interpreted as allowing for the inclusion of additional components rather than excluding them. Additionally, terms such as "corresponding" as described above may include at least one of the meanings of "opposing" or "overlapping."

[0054] Hereinafter, a camera device according to an embodiment and an optical device including the same will be described as follows with reference to the attached drawings. For convenience of explanation, the camera device according to the embodiment is described using a Cartesian coordinate system (x, y, z), but may be described using other coordinate systems, and the embodiment is not limited thereto. In each drawing, the X-axis and the Y-axis may refer to directions perpendicular to the Z-axis, which is the direction of the optical axis (OA). In addition, the Z-axis direction, which is the direction of the optical axis (OA), may be defined as any one of the 'first direction', 'second direction', and 'third direction', the X-axis direction may be defined as any one of the 'first direction', 'second direction', and 'third direction', and the Y-axis direction may be defined as the other one among the 'first direction', 'second direction', and 'third direction'.

[0055] Additionally, the X-axis can be defined as either the "first axis" or the "second axis," the X-axis direction can be defined as either the "first axis direction" or the "second axis direction," the Y-axis can be defined as the other of the "first axis" and the "second axis," and the Y-axis direction can be defined as the other of the "first axis direction" and the "second axis direction."

[0056] Additionally, the optical axis (OA) may be the optical axis of the lens mounted on the lens barrel. Alternatively, the optical axis (OA) may be an axis perpendicular to the imaging area of ​​the image sensor and passing through the center of the imaging area. Also, the expression "terminal" below may be replaced with a pad, electrode, or conductive layer. Also, the circuit board below may be replaced with "board section," "board," or "printed circuit board." Below, "acquire" may be replaced with "calculate," "detect," or "generate."

[0057] The camera device according to the embodiment may perform either a hand image stabilization function or an auto-focusing function, or perform both a hand image stabilization function and an auto-focusing function. The "hand image stabilization function" may be a function that moves the lens in a direction perpendicular to the optical axis or tilts the lens relative to the optical axis to cancel out vibrations (or movements) caused by the user's hand shake. Additionally, the "auto-focusing function" may be a function that automatically focuses on a subject by moving the lens in the direction of the optical axis according to the distance to the subject in order to obtain a clear image of the subject on the image sensor. Hereinafter, "camera device" may be replaced with "camera," "actuator," "camera module," "imaging device," or "photographer."

[0058] FIG. 1 is a perspective view of a camera device (200) according to an embodiment, FIG. 2 is an exploded perspective view of the camera device (200) of FIG. 1, FIG. 3 is a perspective view of the camera device (200) excluding a cover member (300), FIG. 4 shows a stopper (20), a bobbin (110), a housing (140), magnets (40, 130), a circuit board (190), a coil (120), and a ball member (21), FIG. 5 shows a housing (140), an OIS magnet (40), a circuit board (190), a position sensor (170), and a coil (120), FIG. 6 shows an image sensor part (350), a tilting guide part (60), a magnetic body (31), and an OIS ball member (36), FIG. 7 shows an image sensor part (350), a tilting guide part (60), a magnetic body (31), and an OIS ball FIG. 8 is a lower perspective view of a member (36), FIG. 8 shows a base (210) and a magnetic body (32), FIG. 9 shows a base (210), a circuit board (250), an OIS coil (50), a magnetic body (32), a position sensor (24), and a temperature sensor (8), FIG. 10a is a cross-sectional view of a camera device (200) in the AB direction of FIG. 3, FIG. 10b is a cross-sectional view of a camera device (200) in the CD direction of FIG. 3, FIG. 10c is a cross-sectional view of a camera device (200) in the EF direction of FIG. 3, FIG. 10d is a cross-sectional view of a camera device (200) including a lens module (400), FIG. 11 is a functional block diagram of a control unit (830), FIG. 12a is for explaining the first axis tilting of the camera device (200), FIG. 12b is for explaining the second axis of the camera device (200). FIG. 13 is for explaining tilting and shows a tilting guide part (60), first and second coil units (40A, 40B), first and second magnet units (40A, 40B), and first and second sensors (24A, 24B).

[0059] Referring to FIGS. 1 to 13, the camera device (200) may include a fixed part (405), an OIS (Optical Image Stabilizer) moving part (500), and a support part (450). The OIS moving part (500) may be expressed as a "moving part," a shaking part, a "moving part," a "moving module," a "tilting part," or a "tilting module."

[0060] The fixed part (405) may be a fixed element. The fixed part (405) may not move in the direction of the optical axis. Alternatively, the fixed part (405) may not move or tilt in a direction perpendicular to the optical axis. Additionally, the fixed part (405) may include a configuration coupled to the fixed part (405).

[0061] The fixed part (405) may include a base (210). The fixed part (405) may include a cover member (300). For example, the fixed part (405) may include a configuration disposed on or coupled to the base (210) or the cover member (300). For example, the fixed part (405) may include at least one of a circuit board (250), a coil (50), and a magnetic body (32) disposed on the base (210). Additionally, the fixed part (405) may include an OIS position sensor (24). Additionally, the fixed part (405) may include a temperature sensor (8).

[0062] The OIS moving part (500) may move with respect to the fixed part (405) based on a first axis (601) that intersects the optical axis (or optical axis direction) or may be tilted based on the first axis (601). Additionally, the OIS moving part (500) may move with respect to the fixed part (405) based on a second axis (602) that intersects the optical axis (or optical axis direction) or may be tilted based on the second axis (602).

[0063] The first axis (601) and the second axis (602) may intersect each other. The first axis (601) may intersect the optical axis (or optical axis direction). The second axis (602) may intersect the optical axis (or optical axis direction) and the first axis (601). For example, the first axis (601) may be perpendicular to the optical axis direction, and the second axis (602) may be perpendicular to the optical axis direction and the first axis (601).

[0064] The OIS moving unit (500) may include a lens moving unit (100). The lens moving unit (100) may be expressed as a "lens moving device," "AF actuator," "autofocus device," or "autofocus module." The lens moving unit (100) may include an AF moving unit (e.g., a bobbin (110)) capable of moving in the direction of the optical axis.

[0065] Additionally, the OIS moving unit (500) may include an image sensor unit (350). The image sensor unit (350) may be positioned below the lens moving unit (100) in the direction of the optical axis. The image sensor unit (350) may include an "image sensor (810)". The image sensor unit (350) may include a control unit (830). The image sensor unit (350) may be coupled with the lens moving unit (100) and may be tilted or rotated by a preset angle with respect to the first axis (601) or the second axis (602) together with the lens moving unit (100).

[0066] The support member (450)(450) can support the OIS moving member with respect to the fixed member (405). The support member (450)(450) may include a tilting guide member (60) disposed between the OIS moving member (500) and the fixed member (405). The support member (450)(450) may include rolling members (36, 37) disposed between the OIS moving member (500) and the fixed member (405) respectively and the tilting guide member (60).

[0067] The lens moving part (100) may be disposed on the inner side of the cover member (300). The lens moving part (100) may include a housing (140) and a bobbin (110) movable in the direction of the optical axis.

[0068] The bobbin (110) may accommodate a lens or a lens barrel. The bobbin (110) may be placed within a cover member (300). The bobbin (110) may be placed spaced apart from the housing (140). The bobbin (110) may be placed within the housing (140). The bobbin (110) may be referred to as a "lens holder" or a "lens carrier." The bobbin (110) may include an opening (101) for coupling with a lens module (400). The bobbin (110) may be tilted with respect to a first axis (601) or a second axis (602) or rotated by a preset angle.

[0069] The bobbin (110) may include an opening (101) for coupling with the lens module (400). The lens module (400) may include at least one of a lens barrel and a lens array.

[0070] The bobbin (110) may include a lower portion (110A) and an upper portion (110B) positioned on the lower portion (110A). For example, the lower portion (110A) may have a polygonal shape, and the upper portion (110B) may have a cylindrical shape. The bobbin (110) may include a seating groove (112) for seating or positioning a magnet (130). The seating groove (112) may be formed on the outer surface of the lower portion (110A) of the bobbin (110). The bobbin (110) may include a plurality of sides.

[0071] The bobbin (110) may include at least one groove (114) for a ball member (21) to be placed therein. In any one of the sides of the bobbin (110), spaced-apart grooves (114A, 114B) may be formed. The grooves (114A, 114B) may be formed on both sides of the seating groove (112) of the bobbin (110). The groove (114) may be referred to as a "receiving groove" or a "guide groove." The bobbin (110) may include a groove (115) formed at a position corresponding to the buffer portion (25) of the stopper (20).

[0072] The camera device (200) may further include a yoke (135) disposed on the bobbin (110). The yoke (135) may be disposed within the seating groove (112) of the bobbin (110). The yoke (135) may be inserted into the bobbin (110). The yoke (135) may serve to suppress the leakage magnetic flux of the magnet (130) and improve the electromagnetic force between the magnet (130) and the coil (120).

[0073] The housing (140) may be disposed on the inner side of the cover member (300). The housing (140) may include an opening (201) corresponding to the opening (101) of the bobbin (110). The opening (201) may penetrate the housing (140) in the direction of the optical axis. The housing (140) may be referred to as a "holder."

[0074] The housing (140) may include a plurality of sides (41A to 41D). The plurality of sides (41A to 41D) of the housing (140) may correspond to or opposite to the sides of the bobbin (110). Each of the sides (41A to 41D) of the housing (140) may be arranged parallel to any one of the corresponding side plates (302) of the cover member (300).

[0075] Referring to FIG. 4, the first side (41A) and the second side (41B) may be located opposite each other in the first axis direction (e.g., the Y-axis direction). The third side (41C) and the fourth side (41D) may be located opposite each other in the second axis direction (e.g., the X-axis direction). The first axis direction may be a direction parallel to the first axis (601). The second axis direction may be a direction parallel to the second axis (602).

[0076] The housing (140) may be positioned below the bobbin (110) and may include a protrusion (45) that protrudes from at least one inner surface of a plurality of sides (41A to 41D) and overlaps with the bobbin (110) in the direction of the optical axis. The protrusion (45) may serve as a lower stopper to restrict the downward movement of the bobbin (110). The housing (140) may include a seating portion (147) for positioning the magnet units (40A to 40D) of the OIS magnet (40). Two seating portions (147) spaced apart from each other may be formed on each of the first side (41A) and the second side (41B) of the housing (140). The seating portion (147) may be a groove or a hole.

[0077] The housing (140) may include relief portions (15A to 15D) formed at positions corresponding to the extension portions (17A to 17D) of the tilting guide portion (60). For example, the relief portions (15A to 15D) may be formed on each side portion (41A to 41D) of the housing (140). The relief portions (15A to 15D) may be grooves with an open bottom so that the extension portions (17A to 17D) of the tilting guide portion (60) can be inserted. For example, the escape portion (15A) may be located between two magnet units (40A, 40B), the escape portion (15B) may be located between two other magnet units (40C, 40D), the escape portion (15C) may be formed in the center of the third side (41C) of the housing (140), and the escape portion (15D) may be formed in the center of the fourth side (41D) of the housing (140). For example, the escape portions (15A, 15B) may be aligned with or overlapped with the first axis (601), and the escape portions (15C, 15D) may be aligned with or overlapped with the second axis (602). A groove (47A) for placing or receiving a part of a ball member (B1) may be formed in the relief portion (15A) of the housing (140), and a groove (47B) for placing or receiving a part of a ball member (B2) may be formed in the relief portion (15B) of the housing (140).

[0078] The housing (140) may include a receiving portion (224) in which a portion of the ball member (21) for AF is placed or received. The receiving portion (224) may be expressed as a "receiving groove," "groove," or "guide groove." The receiving portion (224) may be a groove formed on the inner surface of the third side (41C) of the housing (140). The receiving portion (224) may include two grooves (224A, 224B) spaced apart from each other. The housing (140) may further include a reinforcing member or an insert member inserted inside to increase strength, and the reinforcing member may be formed of a metal material.

[0079] The lens moving part (100) may include a coil (120) and a magnet (130) for moving the bobbin (110) in the direction of the optical axis by electromagnetic interaction.

[0080] The magnet (130) may be placed, coupled, or fixed to the bobbin (110). For example, the magnet (130) may be placed or coupled to any of the sides of the bobbin (110). The magnet (130) may be placed or coupled to any side of the bobbin (110) that corresponds to, opposes, or overlaps with the third side (41C) of the housing (130). For example, the magnet (130) may be placed within the seating groove (112) of the bobbin (110). The magnet (130) may be placed between the ball members (21A and 21B). The magnet (130) may be placed between the coil (120) and the yoke (135).

[0081] The magnet (130) may be a two-pole magnet having one N pole and one S pole, or a four-pole magnet having two N poles and two S poles. For example, the N pole and the S pole may face each other in the direction of the optical axis. One end and the other end of the magnet (130) located opposite each other in the direction of the first axis (e.g., the Y-axis direction) may protrude in a direction toward the magnetic body (70). This is to improve the attractive force between the magnetic body (70) and the magnet (130) to stably support the bobbin (110). In another embodiment, the surface of the magnet (130) facing the magnetic body (70) may be flat.

[0082] The coil (120) may be placed in the housing (140). The coil (120) may be placed in a direction perpendicular to the optical axis or in a second axis direction (e.g., X-axis direction) so as to correspond, oppose, or overlap with the magnet (130). The coil (120) may be placed on the third side (41C) of the housing (140). The coil (120) may overlap with one end or the other end of the magnet (130) in the first axis direction. In other embodiments, the coil (120) may not overlap with one end or the other end of the magnet (130) in the first axis direction.

[0083] The coil (120) may include a hollow or a hole. For example, the coil (120) may have a ring shape or a closed curve shape. The coil (120) may be a straight line perpendicular to the optical axis (OA) and perpendicular to the outer surface of the third side (41C) of the housing (140), or a ring shape wound around the second axis (602). For example, in a ring-shaped coil (120), the length of the coil (120) in the direction parallel to the first axis (601) may be greater than the length of the coil (120) in the direction of the optical axis.

[0084] The AF moving part (e.g., bobbin (110)) can move in the direction of the optical axis through the interaction between the coil (120) and the magnet (130). A driving signal may be applied to the coil (120) to generate an electromagnetic force through electromagnetic interaction with the magnet (130).

[0085] In another embodiment, the AF coil (120) may be placed in a moving part (e.g., a bobbin), and the AF magnet (130) may be placed in a fixed part (405) (e.g., a housing).

[0086] The lens moving part (100) may further include a circuit board (190) that is placed in or coupled to the housing (140). The circuit board (190) may be placed in or coupled to the third side (41C) of the housing (140). A coil (120) may be placed in or mounted on the circuit board (190). The coil (120) may be electrically connected to the circuit board (190). The circuit board (190) may include pads (6A, 6B) that are electrically connected to the coil (120) by conductive adhesive or solder. The coil (120) may be placed on the first surface of the circuit board (190) facing the magnet (130). Additionally, the circuit board (190) may include terminals (83) that are electrically connected to the image sensor part (350). Pads (6A, 6B) can be electrically connected to two corresponding terminals (83) of the circuit board (190).

[0087] For AF feedback driving, the lens moving unit (100) may further include a position sensor (170). The position sensor (170) can detect the position or displacement of the bobbin (110) in the direction of the optical axis. The position sensor (170) can be opposite to the magnet (130) and can detect the magnet (130). The position sensor (170) can be opposite to the magnet (130) and can detect the magnet (130). The position sensor (170) can be opposite to or overlap with the magnet (130) in the direction of the second axis (e.g., the X-axis direction).

[0088] In another embodiment, a sensing magnet facing a position sensor (170) may be placed on the bobbin (110) separately from the magnet (130), and the position sensor (170) may detect the displacement of the bobbin by detecting the sensing magnet or the magnetic field of the sensing magnet.

[0089] The position sensor (170) may be placed in the housing (140). The position sensor (170) may be placed on or coupled to the circuit board (190). The position sensor (170) may be electrically connected to the circuit board (190). For example, the position sensor (170) may be placed within the hollow of the coil (120). In another embodiment, the position sensor (170) may be located outside the hollow of the coil (120). The position sensor (170) may be placed on the first surface of the circuit board (190) facing the magnet (130).

[0090] The position sensor (170) may be a Hall sensor. In this case, the position sensor (170) may include two input terminals to which a driving signal is applied and two output terminals to which an output signal is output. A circuit board (800) or a control unit (830) may supply a driving signal to the two input terminals of the position sensor (170), and the output signal output from the two output terminals of the position sensor (170) may be transmitted to the circuit board (800) or the control unit (830). The two input terminals and two output terminals of the position sensor (170) may be electrically connected to four of the terminals (83) of the circuit board (190).

[0091] In another embodiment, the position sensor (170) may be implemented in the form of a driver IC including a Hall sensor. For example, if the position sensor (170) is a driver IC including a Hall sensor, the position sensor (170) may include first and second terminals to which power or driving signals are input, a third terminal for a clock signal, a fourth terminal for a data signal, and fifth and sixth terminals for supplying driving signals to the coil (120). In this case, the fifth and sixth terminals of the position sensor (170) may be electrically connected to two pads (6A, 6B) of the circuit board (190).

[0092] The camera device (200) may include at least one ball member (21) disposed between the bobbin (110) and the housing (140). The ball member (21) may be disposed between the groove (114) of the bobbin (110) and the receiving portion (224) of the housing (140).

[0093] The ball member (21) may be replaced with "rolling member," "ball," or "ball bearing." The ball member (21) may come into contact with the bobbin (110) and the housing (140), perform rolling or rotational motion between the bobbin (110) and the housing (140), and support the movement of the bobbin (110) in the direction of the optical axis. When the bobbin (110) moves in the direction of the optical axis, the ball member (21) may reduce friction between the bobbin (110) and the housing (140). For the rolling or rotation of the ball member (21), the bobbin (110) may come into contact with the ball member (21) and slide or slide in the direction of the optical axis. The ball member (21) may include a first ball member (21A) and a second ball member (21B). Each of the ball members (21A, 21B) may include a plurality of balls arranged in the direction of the optical axis.

[0094] The camera device (200) may include a magnet (130) and a magnetic body (70) with which an attractive force acts. An attractive force may act between the magnetic body (70) and the magnet (130) in a direction perpendicular to the optical axis (or in the direction of the second axis). The magnetic body (70) may be placed in or coupled to the housing (140). The magnetic body (70) may be placed in or coupled to the third side (41C) of the housing (140). The magnetic body (70) may be placed on the second surface of the circuit board (190). The second surface of the circuit board (190) may be the opposite side of the first surface of the circuit board (190). The magnetic body (70) may be inserted into the third side (41C) of the housing (140). In another embodiment, the magnetic body (70) may be placed in the base (210). Due to the attractive force between the magnetic body (70) and the magnet (130), the bobbin (110) and the housing (140) can press the ball member (21), and the bobbin (110) can be stably supported. The magnetic body (70) and the magnet (130) may be a "pressure unit" or a "pressure member."

[0095] The lens moving part (100) may include an upper stopper (20) positioned on the upper side of the bobbin (110) and the upper side of the housing (140). The upper stopper (20) may be coupled to the housing (140). The upper stopper (20) may include a body (20A) positioned on the upper side of the bobbin (110) and an extension part (20B) connected to the body (20A) and coupled to the side part (e.g., 41C, 41D) of the housing (140). The upper stopper (20) may include a hole (29) that corresponds to or faces the bobbin (100) and penetrates the body (20A). The extension part (29B) may be bent downward from the body (20A). A groove (43) for arranging an extension (20B) may be formed on the side (e.g., 41C, 41D) of the housing (140), and a projection (44) for coupling with the extension (20B) may be formed.

[0096] The upper stopper (20) may include at least one buffer (25) (or buffer) for cushioning impact. The buffer (25) may be placed in the body (20A). The buffer (25) may be formed of a shock-absorbing material, such as an elastomer. A hole may be formed in the body (20A), and a buffer material may be injected into the hole of the body (20A), and the buffer (25) may be formed to be placed on at least one of the upper and lower surfaces of the body (20A). The buffer (25) may be formed to overlap with the bobbin (110) (e.g., lower (110A)) in the direction of the optical axis. The buffer (25) may restrict the movement of the bobbin (110) in the upward direction.

[0097] The lens moving part (100) may include an OIS magnet (40). The OIS magnet (40) may be for hand shake correction. The OIS magnet (40) may be placed in or coupled to the housing (140). The OIS magnet (40) may include a first magnet unit (40A) and a second magnet unit (40B) placed on the first side (41A) of the housing (140), and a third magnet unit (40C) and a fourth magnet unit (40D) placed on the second side (41B) of the housing (140). The magnet (40) may not be placed on the third and fourth sides (41C, 41D) of the housing (140).

[0098] The first magnet unit (40A) and the second magnet unit (40B) may be spaced apart in the second axis direction, and the third magnet unit (40C) and the fourth magnet unit (40D) may be spaced apart in the second axis direction. The first magnet unit (40A) and the third magnet unit (40C) may face each other or overlap in the first axis direction, and the second magnet unit (40B) and the fourth magnet unit (40D) may face each other or overlap in the first axis direction.

[0099] The separation distance (D1) between the first magnet unit (40A) and the second magnet unit (40B) or the separation distance between the third magnet unit (40C) and the fourth magnet unit (40D) may be smaller than the separation distance (D2) between the first magnet unit (40A) and the third magnet unit (40C) and the separation distance (D2) between the second magnet unit (40B) and the fourth magnet unit (40D) (D1 <D2).

[0100] Each of the magnet units (40A to 40D) may include a first magnet part (9A) comprising one N pole and one S pole, a second magnet part (9B) comprising one S pole and one N pole, and a partition (9C) disposed between the first magnet part (9A) and the second magnet part (9B). The partition (9C) may be described as a "Neutral Zone" or "Neutral Region". The partition (9C) may be a non-magnetic material or air, etc. The first magnet part (9A) and the second magnet part (9B) may be located opposite each other in the direction of the optical axis with respect to the partition (9C). The first magnet part (9A) and the second magnet part (9B) may be arranged so that opposite polarities face each other. In another embodiment, each of the magnet units (40A to 40D) may be a two-pole magnet comprising one N pole and one S pole.

[0101] The image sensor unit (350) can be placed below the bobbin (110). The image sensor unit (350) can be placed below the housing (140). The image sensor unit (350) can be combined with the lens moving unit (100). The image sensor unit (350) can be combined with the housing (140).

[0102] The image sensor (810) may be positioned to face or overlap the opening (101) of the bobbin (110), the lens module (400), or / and a filter (not shown) in the direction of the optical axis. The image sensor (810) may include an imaging area for detecting light. Here, the imaging area may be expressed as an effective area, a light receiving area, or an active area. For example, the imaging area may include a plurality of pixels where an image is formed.

[0103] The image sensor unit (350) may include a circuit board (817) electrically connected to the image sensor (810). The circuit board (817) may include a connector (not shown) for electrical connection with the outside. Additionally, terminals (83) of the circuit board (190) of the lens moving unit (100) may be electrically connected to the circuit board (817) of the image sensor unit (350).

[0104] The image sensor unit (350) may include a sensor base (270) disposed below the housing (140). The sensor base (270) may be disposed within the cover member (300). The sensor base (270) may be disposed inside the base (210). The sensor base (270) may be coupled with the housing (140). A circuit board (817) may be disposed on the sensor base (270) or coupled with the sensor base (270). An image sensor (810) may be disposed on the circuit board (817). The circuit board (817) may be disposed on the upper surface of the sensor base (270). The circuit board (817) may be coupled with the sensor base (270).

[0105] The sensor base (270) may be referred to as a "holder." Additionally, the housing (140) may be referred to as a "first housing" (or "first holder"), and the sensor base (270) may be referred to as a "second housing" (or "second holder"). Furthermore, the housing (140) and the sensor base (270) may not be distinguished and may be referred to by a single term, such as "housing," "holder," or "sensor base." In another embodiment, the sensor base (270) and the housing (140) may be formed integrally. The sensor base (270) may be spaced apart from the ball member (36).

[0106] The image sensor unit (350) may include a filter (not shown) facing or overlapping with the image sensor (817) in the direction of the optical axis. The filter may be placed in the housing (140) or coupled with the housing (140). For example, the filter may be coupled to the lower part of the housing (140) or the lower surface of the housing (140). For example, the filter may be an infrared blocking filter.

[0107] The sensor base (270) may include a groove for at least a portion of the first rolling member (36) to be placed therein. In this case, the groove may be formed on the lower surface of the sensor base (270).

[0108] The OIS moving part (500) may include a magnetic body (31) that is placed on or coupled to an image sensor part (350), for example, a sensor base (270).

[0109] The base (210) may include a cavity for accommodating the OIS moving part (500). At least a portion of the base (210) may be disposed within the cover member (300). The base (210) may include a plurality of sides (71A to 71D) corresponding to the sides (41A to 41D) of the housing (140). The plurality of sides (41A to 41D) of the housing (140) may be replaced with "sides of the OIS moving part (500)," and the sides (71A to 71D) of the base (210) may be replaced with "sides of the fixed part (405)."

[0110] The base (210) may include a lower portion (214) (or lower plate) located below the sides (71A to 71D). The lower portion (214) of the base (210) may be connected to the lower side of the sides (71A to 71D) of the base (210). For example, the lower portion (214) of the base (210) may be referred to as a "bottom portion," "bottom surface," or "body." For example, the sides (71A to 71D) may extend upward from the lower portion (214) or protrude. Each of the first to fourth sides (71A to 71D) of the base (210) may be arranged parallel to any one of the corresponding side plates (302) of the cover member (300).

[0111] The base (210) may include a seating portion (73) for placing or receiving a coil (50). The seating portion (73) may be in the form of a through hole penetrating the side of the base (210). In another embodiment, the seating portion (73) may be in the form of a groove recessed from the side of the base (210). The seating portion (73) may include first and second seating portions (73A, 73B) formed spaced apart from each other on the first side (71A) of the base (210), and third and fourth seating portions (73C, 73D) formed spaced apart from each other on the second side (71B) of the base (210).

[0112] The base (210) may include a receiving portion (217) for receiving a magnetic body (32). The receiving portion (217) may be placed or formed in the lower portion (214) of the base (210). The receiving portion (217) may be a groove formed in the lower portion (214) of the base (210).

[0113] The base (210) may include escape portions (26A to 26D) for avoiding spatial interference with the extension portions (17A to 17D) of the tilting guide portion (60). The escape portions (26A to 26D) may be formed on the first to fourth sides (71A to 71D) of the base (210). The escape portions (26A to 26D) may be in the form of grooves formed on the sides (e.g., 71A, 71B), or in the form of holes or openings penetrating the sides (e.g., 71C).

[0114] The base (210) may include grooves (75A, 75B) for accommodating at least a portion of the ball members (B3, B4) or receiving at least a portion of the second rolling member (37). The grooves (75A, 75B) may be located in the center of the side (71C, 71D) of the base (210). The grooves (75A, 75B) may be located lower than the upper surface of the side (71C, 71D) of the base (210) and higher than the upper surface of the lower (214) of the base (210). The grooves (75A, 75B) may be located opposite each other in the second axis direction. The base (210) may include a first protrusion (44A) located below the third relief portion (26C) and protruding from the upper surface of the lower portion (214) of the base (210), and a second protrusion (44B) located below the fourth relief portion (26D) and protruding from the upper surface of the lower portion (214) of the base (210). A groove (75A) may be formed on the upper surface of the first protrusion (44A), and a groove (75B) may be formed on the upper surface of the second protrusion (44B).

[0115] The base (210) may further include a reinforcing member (215) inserted inside to reinforce strength, and the reinforcing member (215) may be made of metal. The reinforcing member (215) may also be represented as an insert member. A portion of the reinforcing member (215) may be exposed from the upper surface of the lower part (214) of the base (210) (or the bottom surface of the receiving portion (217)), and a magnetic body (32) may be attached to the exposed portion of the reinforcing member (215).

[0116] The coil (50) may be placed on the base (210) to correspond to or face the OIS magnet (40). The coil (50) may tilt the OIS moving part (500) with respect to the first axis (601) or the second axis (602) or rotate it by a preset angle through interaction with the OIS magnet (40) placed on the OIS moving part (500).

[0117] The coil (50) may include a plurality of coil units (50A to 50D) that correspond to, oppose, or overlap with a plurality of magnet units (40A to 40D). The coil (50) may include a first coil unit (50A) and a second coil unit (50B) disposed on the first side (71A) of the base (210), and a third coil unit (50C) and a fourth coil unit (50D) disposed on the second side (71B) of the base (210). Each of the coil units (50A to 50D) may correspond to, oppose, or overlap with any one of the corresponding magnet units (40A to 40B) in the first axis direction (e.g., the Y-axis direction). The coil (50) may not be disposed on the third and fourth sides (71C, 71D) of the base (210).

[0118] Each of the coil units (50A to 50D) may include a hollow (4A to 4D) or a hole. Each of the coil units (50A to 50D) may have a ring shape or a closed curve shape. The hollow (4A to 4D) of each of the coil units (50A to 50D) may face or overlap with any one of the corresponding magnet units (40A to 40D) in the first axial direction.

[0119] Each of the first and second coil units (50A, 50B) may be in the shape of a ring wound with respect to an axis (or first axis (601)) perpendicular to the outer surface of the first side (71A) of the base (210), and each of the third and fourth coil units (50C, 50D) may be in the shape of a ring wound with respect to an axis (or first axis (601)) perpendicular to the outer surface of the second side (71B) of the base (210).

[0120] In another embodiment, the positions of the OIS coil (50) and the OIS magnet (40) may be reversed. That is, the first and second magnet units of the OIS magnet may be placed on the first side (41A or 71A) of either the OIS moving part (500) (e.g., housing (140)) or the fixed part (405) (e.g., base (210)), and the third and fourth magnet units may be placed on the second side (41B or 71B) of either the moving part (e.g., housing (140)) or the fixed part (405) (e.g., base (210)).

[0121] Additionally, the first and second coil units of the OIS coil may be placed on the remaining first side (41A or 71A) of the moving part (e.g., housing (140)) and the fixed part (405) (e.g., base (210)), and the third and fourth coil units may be placed on the remaining second side (41B or 71B) of the moving part (e.g., housing (140)) and the fixed part (405) (e.g., base (210)). At this time, the first axis (601) may intersect with the first side (41A or 71A) of either the moving part (e.g., housing (140)) and the fixed part (405) (e.g., base (210)). For example, the first axis (601) may be perpendicular to the first side (41A, 71A). Additionally, the second axis (602) may intersect the first axis (601). For example, the first axis (601) and the second axis (601) may be perpendicular.

[0122] The camera device (200) may include a circuit board (250) that is placed or coupled to a fixed part (405) (e.g., a base (210)). The circuit board (250) may be placed or coupled to at least one of the sides (71A to 71D) of the base (210). The circuit board (250) may include a first board (250A) placed on the first side (71A) of the base (210), a second board (250B) placed on the second side (71B) of the base (210), and a third board (250C) placed on the third side (71C) of the base (210). The circuit board (250) may include terminals (251) for electrical connection with the outside. The third substrate (250C) may include a hole (255) to avoid spatial interference with the first protrusion (44A) of the base (210).

[0123] Each of the first and second coil units (50A, 50B) may be placed on or coupled to the first substrate (250A) of the circuit board (250) and may be electrically connected to the first substrate (250). Each of the third and fourth coil units (50C, 50D) may be placed on or coupled to the second substrate (250B) of the circuit board (250) and may be electrically connected to the second substrate (250B).

[0124] For OIS feedback driving, the camera device (200) may include an OIS position sensor (24) placed in a fixed part (405). The OIS position sensor (24) can detect displacement or angular displacement of the OIS moving part (500) due to tilting or rotation of the OIS moving part (500).

[0125] The OIS position sensor (24) may include a first sensor (24A) corresponding to, opposite to, or overlapping with the first magnet unit (50A) in the first axis direction, a second sensor (24B) corresponding to, opposite to, or overlapping with the second magnet unit (50B) in the first axis direction, a third sensor (24C) corresponding to, opposite to, or overlapping with the third magnet unit (50C) in the first axis direction, and a fourth sensor (24D) corresponding to, opposite to, or overlapping with the fourth magnet unit (50D) in the first axis direction.

[0126] The first and second sensors (24A, 24B) may be placed on the first side (71A) of the base (210) and may be spaced apart from each other in the second axis direction (X-axis direction). The first and second sensors (24A, 24B) may be placed on the first substrate (250A) and may be electrically connected to the first substrate (250A). The third and fourth sensors (24C, 24D) may be placed on the second side (71B) of the base (210) and may be spaced apart from each other in the second axis direction (X-axis direction). The third and fourth sensors (24C, 24D) may be placed on the second substrate (250B) and may be electrically connected to the second substrate (250B).

[0127] For example, the first sensor (24A) may be placed inside the hollow (4A) of the first coil unit (50A), the second sensor (24B) may be placed inside the hollow (4B) of the second coil unit (50B), the third sensor (24C) may be placed inside the hollow (4C) of the third coil unit (50C), and the fourth sensor (24D) may be placed inside the hollow (4D) of the fourth coil unit (50D). In another embodiment, each sensor (24A to 24D) may be located outside the hollow (4A to 4D) of each coil unit (50A to 50D).

[0128] The first sensor (24A) can detect the first magnet unit (40A), and the second sensor (24B) can detect the second magnet unit (40B). The third sensor (24C) can detect the third magnet unit (40C), and the fourth sensor (24D) can detect the fourth magnet unit (40D). Each of the first to fourth sensors (24A, 24B, 24C, 24D) may be a Hall sensor. Each of the first to fourth sensors (24A, 24B, 24C, 24D) may include first and second input terminals for receiving power or driving signals and first and second output terminals for outputting output signals.

[0129] The camera device (200) may include a control unit (830) for controlling the driving of the coil (50). The control unit (830) may be electrically connected to the circuit board (250). Although not shown in FIG. 2, the control unit (830) may be placed on the circuit board (250). In another embodiment, the control unit (780) of the optical device (200A) may perform the role of the control unit (830).

[0130] Referring to FIG. 11, the control unit (830) can supply power or a driving signal to each of the first and fourth sensors (24A to 24D). The control unit (830) can receive outputs (or output signals) of the first to fourth sensors (24A, 24B, 24C, 24D). The control unit (830) may include a driving unit (510) that supplies a driving signal to each of the first to fourth coil units (50A to 50D).

[0131] The control unit (830) can calculate the difference (or sum) of the output signals of the first and fourth sensors (24A, 24D) corresponding to the first and fourth magnet units (40A, 40D) that do not overlap each other in the first axis direction. Additionally, the control unit (830) can calculate the difference (or sum) of the output signals of the second and third sensors (24B, 24C) corresponding to the second and third magnet units (40B, 40C) that do not overlap each other in the first axis direction. The control unit (830) may include an analog-to-digital converter (530) that receives the output signals of each of the first to fourth sensors (24A to 24D) and outputs a data value (or code value) based on the result of converting the received output signals from analog to digital.

[0132] The camera device (200) may include temperature sensors (8A to 8D) disposed on a circuit board (250) and electrically connected to the circuit board (250). Each of the temperature sensors (8A to 8D) may be disposed adjacent to any one of the corresponding sensors (24A to 24D). For example, each of the temperature sensors (8A to 8D) may be disposed inside any one of the corresponding hollows (4A to 4D) of the coil units (50A to 50D). Each of the temperature sensors (8A to 8D) may measure the temperature around the temperature sensor. Information regarding the temperature measured by the temperature sensors (8A to 8D) may be used to compensate for the influence of the output of each of the first to fourth sensors (41A to 41D) due to temperature changes. The control unit (830) can compensate the output value (or data value regarding the output) of each of the first to fourth sensors (24A to 24D) using the temperature measured by the temperature sensors (8A to 8D) and the temperature compensation algorithm (or compensation formula). The temperature compensation algorithm or compensation formula may be stored in the control unit (830) or in a separate memory. The control unit (830) can control the driving signal of the first to fourth coil units (50A to 50D) using the outputs of the first to fourth sensors (24A to 24D).

[0133] The cover member (300) can form a receiving space together with the base (210), and an OIS moving part (500) can be disposed within the receiving space. The cover member (300) may include a top plate (301) and a side plate (302) connected to the top plate (301). The bottom of the side plate (302) of the cover member (300) may be coupled to the base (210). A through hole (303) may be formed in the top plate (302) of the cover member (300) to expose the lens module (400) to external light. An opening (304) may be formed in the side plate (302) of the cover member (300) to expose the terminal (251) of the circuit board (250).

[0134] The support member (450) may be positioned between the fixed member (405) and the OIS moving member (500). The support member (450) may support the OIS moving member (500) with respect to the fixed member (405). The support member (450) may be positioned between the sensor base (270) and the base (210), and may support the image sensor member (350) with respect to the base (210). The support member (450) may include a tilting guide member (60) positioned between the sensor base (270) and the base (210).

[0135] The tilting guide section (60) may be expressed as a "moving plate," "tilt carrier," "mover," "mover plate," "drive plate," "moving plate," "drive plate," "plate," "rotating plate," "tilting plate," "moving plate," or "support plate." The tilting guide section (60) can serve to guide the tilt of the OIS moving section (500).

[0136] The tilting guide portion (60) may include a body (61) positioned between the sensor base (270) and the lower portion (214) of the base (210), and a plurality of extension portions (17A to 17D) connected to the body (61). The body (61) may be in the form of a plate. To avoid spatial interference with the magnetic body (31), the tilting guide portion (60) may include a hole (60A) that corresponds to, opposes, or overlaps with the magnetic body (31) (or magnetic body (32)) in the direction of the optical axis. The hole (60A) may be a through hole penetrating the body (61).

[0137] The tilting guide portion (60) may include at least one of an injection molded part and a metal member. The tilting guide portion (60) may include a plastic, resin, or ceramic material. The tilting guide portion (60) may include a metal material, for example, SUS material. For example, the tilting guide portion (60) may be an injection molded part with a metal member inserted therein. Also, the tilting guide portion (60) may be a non-magnetic material. In another embodiment, the tilting guide portion (60) may be a magnetic material. For example, each of the extension portions (17A to 17D) may include an injection molded part and a metal member. Each end of the extension portions (17A to 17D) may be formed as an injection molded part, and a groove may be formed at each end of the extension portions (17A to 17D) for placing at least a portion of the ball members (B1 to B4).

[0138] The first and second extensions (17A, 17B) may be located opposite each other in the first axis direction with respect to the body (61), and the third and fourth extensions (17C, 17D) may be located opposite each other in the second axis direction with respect to the body (61). Each of the extensions (17A to 17D) may extend upward.

[0139] The first extension part (17A) may include a first part (1A) connected to the first side of the body (61) and a second part (1B) extending upward from the first part (1A). The second extension part (17B) may include a third part (1C) connected to the second side of the body (61) and extending in a second horizontal direction, and a fourth part (1D) extending upward from the third part (1C). The first side and the second side of the body (61) may be located opposite each other in the first axis direction. The first part (1A) and the third part (1C) may extend in the first axis direction and may extend in opposite directions. A groove may be formed on the upper surface of each of the first part (1A) of the first extension part (17A) and the fourth part (1D) of the second extension part (17B) for the first rolling member (36: B1, B2) to be placed therein.

[0140] The third extension (17C) may include a fifth part (2A) connected to the third side of the body (61), a sixth part (2B) extending upward from the fifth part (2A), and a seventh part (2C) extending from the sixth part (2B). The fourth extension (17D) may include an eighth part (2D) connected to the fourth side of the body (61), a ninth part (2E) extending upward from the eighth part (2D), and a tenth part (2F) extending from the ninth part (2E). The third side and the fourth side of the body (61) may be located opposite each other in the second axis direction. The fifth part (2A) and the eighth part (2D) may extend in the second axis direction and may extend in opposite directions. The seventh part (2C) may be extended in the same direction as the fifth part (2A), and the tenth part (2F) may be extended in the same direction as the eighth part (2D), and the seventh part (2C) and the tenth part (2F) may be extended in opposite directions. A groove may be formed on the lower surface of the seventh part (2C) of the third extension part (17C) and the tenth part (2F) of the fourth extension part (17D) for the second rolling member (37: B3, B4) to be placed therein.

[0141] The support member (450) may include a first rolling member (36) disposed between the tilting guide member (60) and the housing (140) and a second rolling member (37) disposed between the tilting guide member (60) and the base (210). The first rolling member (36) may include a first ball member (B1) disposed on the first side (41A) of the housing (140) and a second ball member (B2) disposed on the second side (41B) of the housing (140). The second rolling member (37) may include a third ball member (B3) disposed on the third side (71C) of the base (210) and a fourth ball member (B4) disposed on the fourth side (71D) of the base (210). For example, the first ball member (B1) may be positioned in the center of the first side (41A) of the housing (140), and the second ball member (B2) may be positioned in the center of the second side (41B) of the housing (140). The third ball member (B3) may be positioned in the center of the third side (71C) of the base (210), and the fourth ball member (B4) may be positioned in the center of the fourth side (71D) of the base (210).

[0142] The first ball member (B1) may be positioned between the first side (41A) of the housing (140) and the first extension (17A) of the tilting guide part (60). The first ball member (B1) may be positioned between the groove (47A) of the housing (140) and the second part (1B) of the first extension (17A) of the tilting guide part (60). The second ball member (B2) may be positioned between the second side (41B) of the housing (140) and the second extension (17B) of the tilting guide part (60). The second ball member (B2) may be positioned between the groove (47B) of the housing (140) and the fourth part (1D) of the second extension (17B) of the tilting guide part (60).

[0143] The third ball member (B3) may be positioned between the third extension (17C) of the tilting guide part (60) and the third side (71C) of the base (210). The third ball member (B3) may be positioned between the seventh part (2C) of the third extension (17C) of the tilting guide part (60) and the first protrusion (44A) of the base (210). The fourth ball member (B4) may be positioned between the fourth extension (17C) of the tilting guide part (60) and the fourth side (71D) of the base (210). The fourth ball member (B4) may be positioned between the tenth part (2F) of the fourth extension (17D) of the tilting guide part (60) and the second protrusion (44B) of the base (210). In another embodiment, instead of the ball members (B1 to B4), a projection (or hemispherical projection) may be formed at each end of the extensions (17A to 17D) of the tilting guide member (60).

[0144] To reduce friction and reduce power consumption, a lubricant may be disposed in at least one of the grooves (47A, 47B) of the housing (140), the grooves (75A, 75B) of the base (210), and the grooves formed at the ends of the extensions (17A to 17D) of the tilting guide portion (60). The ball members (B1 to B4) may be members that perform rolling motion or sliding motion. In the embodiment, the first and second rolling members (36, 37) each exemplify two ball members, but in other embodiments, the number of the first and second rolling members each may be one or three or more.

[0145] The body (61) of the tilting guide portion (60) can be positioned below the image sensor (810). The upper portions (17A to 17D) of the tilting guide portion (60) can be positioned higher than the image sensor (810). As a result, the ball members (B1 to B4) can be positioned higher than the image sensor (810).

[0146] Since the ball members (B1 to B4) are positioned higher than the image sensor (810), the ball members (B1 to B4) can be positioned close to the lens module (400). The drive shafts (601, 602) for tilting the OIS moving part (500) can be positioned higher than the image sensor (810) and close to the lens module (400). As a result, when the OIS operation is not performed, the degree of tilting of the lens module (400) can be reduced. If the tilting of the camera device (200) is large, the aesthetics may be poor. In the embodiment, the drive shafts (601, 602) can be positioned adjacent to the lens module (400) through the extensions (17A to 17D) of the tilting guide part (60), thereby improving the aesthetics of the optical device (200A) equipped with the camera device (200).

[0147] At least a portion of the body (61) of the tilting guide portion (60) may overlap with the image sensor (810) in the optical axis direction. At least a portion of the body (61) of the tilting guide portion (60) may overlap with the lens module (400) (e.g., lens) in the optical axis direction. At least a portion of the opening (60A) of the tilting guide portion (60) may overlap with the image sensor (810) in the optical axis direction. At least a portion of the opening (60A) of the tilting guide portion (60) may overlap with the lens module (400) in the optical axis direction. The ball members (B1 to B4) may not overlap with the image sensor (810) or the lens module (400) in the optical axis direction.

[0148] The support member (450) may include a magnetic body (31) that is placed on or coupled to the OIS moving member (500) (e.g., sensor base (270)) and a magnetic body (32) that is placed on or coupled to the fixed member (405) (e.g., base (210)). The magnetic body (31) and the magnetic body (32) may be replaced with "magnet," "yoke," "holding magnet," "preload plate," or "preload magnet."

[0149] The magnetic body (31) may face or overlap with the opening (60A) of the tilting guide part (60) in the direction of the optical axis. The magnetic body (31) may not overlap with the tilting guide part (60) in the direction of the optical axis. The magnetic body (32) may be placed below the magnetic body (31). The magnetic body (32) may overlap with the magnetic body (31) in the direction of the optical axis. The magnetic body (32) may overlap with the opening (60A) of the tilting guide part (60) in the direction of the optical axis. The magnetic body (32) may not overlap with the tilting guide part (60) in the direction of the optical axis. The magnetic body (32) may not overlap with the tilting guide part (60) in a direction perpendicular to the optical axis. In another embodiment, the magnetic body (32) may overlap with the tilting guide part (60) in a direction perpendicular to the optical axis.

[0150] An attractive force may be applied in the direction of the optical axis (or the first direction) between the magnetic body (32) and the magnetic body (31). For example, the magnetic body (32) may be a magnet, and the magnetic body (31) may be a metal plate attached to the magnet. In another embodiment, the magnetic body (31) may be a magnet, and the magnetic body (32) may be a metal plate attached to the magnet. Due to the attractive force between the magnetic body (32) and the magnetic body (31), the sensor base (270) and the base (210) may press the tilting guide part (60), and the tilting guide part (60) and the ball members (B1 to B4) may be in close contact with the sensor base (270), the housing (140), and the base (210). Due to the attractive force between the magnetic body (32) and the magnetic body (31), the tilting guide part (60) and the ball members (B1 to B4) can stably support the OIS moving part (500) with respect to the fixed part (405), and stable OIS operation can be performed.

[0151] Referring to FIG. 10a, the body (61) of the tilting guide part (60) may be formed such that the slope is lowered from the first side (or second side) of the body (61) toward the third side (or fourth side) of the body (61). That is, the third and fourth sides of the body (61) may be positioned lower than the first and second sides of the body (61). This is to avoid spatial interference between the OIS moving part (500) and the body (61) of the tilting guide part (60) when the OIS moving part (500) is tilted about the first axis (601).

[0152] For hand shake correction, the OIS drive unit can tilt the OIS moving unit (500) based on the first axis (601) or the second axis (602) or rotate it within a preset angle range. The OIS drive unit may include a magnet (40) and a coil (50). The OIS drive unit may include an OIS position sensor (24). The drive unit of the camera device (200) may include an AF drive unit and an OIS drive unit.

[0153] Referring to FIG. 12a and FIG. 12b, a driving signal may be supplied to each of the coil units (50A, 50B), and a first electromagnetic force (F1) may be generated by the interaction between the first magnet unit (40A) and the first coil unit (50A), a second electromagnetic force (F2) may be generated by the interaction between the second magnet unit (40B) and the second coil unit (50B), a third electromagnetic force (F3) may be generated by the interaction between the third magnet unit (40C) and the third coil unit (50C), and a fourth electromagnetic force (F4) may be generated by the interaction between the fourth magnet unit (40D) and the fourth coil unit (50D).

[0154] In FIG. 12a, the OIS moving part (500) can be tilted or rotated within a preset angle range around the first axis (601) (or ball members (B1, B2)). In FIG. 12b, the OIS moving part (500) can be tilted or rotated within a preset angle range around the second axis (602) (or ball members (B3, B4)).

[0155] In the embodiment, when performing hand shake correction or shake correction, the lens module (400) and the image sensor (810) may be simultaneously tilted along the first axis (or X-axis) or the second axis (or Y-axis) by the same direction and the same angle. The first axis tilt is tilting the OIS moving part (500) based on the first axis (601), and the second axis tilt is tilting the OIS moving part (500) based on the second axis (602).

[0156] The first axis (601) may be a straight line perpendicular to the optical axis and passing through the first and second ball members (B1, B2). The first axis (601) may pass through the optical axis (or center (603)). The center (603) may be the center of the OIS moving part (500) and may be a point through which the optical axis (OA) passes. Alternatively, the center (603) may be the center of the opening of the bobbin (110) or the center of the lens module (400). Alternatively, the center (603) may coincide with or be aligned with the center of the imaging area of ​​the image sensor (810). In a coordinate plane including the first axis (601) and the second axis (602), the center (603) may correspond to the origin (0, 0).

[0157] The first axis (601) may be a straight line connecting the center of the first ball member (B1) and the center of the second ball member (B2). The second axis (602) may be a straight line perpendicular to the optical axis and passing through the third and fourth ball members (B3, B4). The second axis (602) may intersect the first axis (601). For example, the first axis (601) and the second axis (602) may be perpendicular to each other. The direction of the first axis may be a direction parallel to the first axis (601), and the direction of the second axis may be a direction parallel to the second axis (602).

[0158] Referring to FIG. 13, each of the sensors (24A to 24D) may be positioned to overlap or align with the center (5A to 5D). For example, the center (52A to 52C) of each of the sensors (24A to 24D) may be positioned to overlap or align with the center (5A to 5D). The center (5A to 5D) may be the center of the magnet unit (40A to 40D). Or, in another embodiment, the center (5A to 5D) may be the center of the hollow (4A to 4D) of the coil unit (50A to 50D). The distance from the center (52A to 52D) of each sensor (24A to 24D) to the first axis (601) may be the same as the distance from the center (5A to 5D) to the first axis (601).

[0159] In another embodiment, each of the sensors (24A to 24D) may be positioned so as to be offset from the first axis (601) with respect to the center (5A to 5D). In another embodiment, each sensor (24A to 24D) may be positioned between the first axis (601) and a straight line passing through the center (5A to 5D) and perpendicular to the optical axis. The center (52A to 52D) of each sensor (24A to 24D) may be positioned so as to be offset from the first axis (601) with respect to a straight line passing through the center (5A to 5D) and perpendicular to the optical axis. When viewed in the direction of the optical axis or from above, each sensor (24A to 24D) may not overlap with a straight line passing through the center (5A to 5D) and perpendicular to the optical axis.

[0160] The distance (M1) between the magnet units (40A to 40D) and the first axis (601) is smaller than the distance (M2) between the magnet units (40A to 40D) and the second axis (601). <M2). 또한 실시 예에서는 각 센서(24A 내지 24D)와 제1축(601) 간의 거리(L1)가 각 센서(24A 내지 24D)와 제2축(602) 간의 거리보다 작다(L1<L2).

[0161] Referring to FIG. 13, in a coordinate plane where the first axis (601) is the Y-axis, the second axis (602) is the X-axis, and the center (603) is the origin, OIS coil units and OIS magnet units corresponding to each other are arranged in each quadrant of the coordinate plane. Additionally, the first and second ball members (B1, B2) may overlap with the first axis (601) or be aligned with the first axis (601), and the third and fourth ball members (B2, B4) may overlap with the second axis (602) or be aligned with the second axis (602).

[0162] Driving signals can be supplied to all four coil units (50A to 50D), and the OIS moving part (500) can be tilted by utilizing all four electromagnetic forces (F1 to F4). Accordingly, in the embodiment, the driving force for tilting the OIS moving part (500) can be increased, the heavy lens module (400) can be tilted, and the resolution of the image sensor (810) can be improved.

[0163] FIG. 14 shows the arrangement of first to fourth sensors (24A to 23D) on a coordinate plane including a first axis (601) and a second axis (602), FIG. 15a shows the trajectory of a reference point (P) of the OIS moving unit (500) according to the tilt of the OIS moving unit (500), and FIG. 15b shows the outputs of the first to fourth sensors (24A to 24D) corresponding to the trajectory of the reference point (P) of the OIS moving unit (500). The reference point (P) may be any part (or point) of the OIS moving unit (500). In this case, the angle (θ) from the positive direction of the z-axis to the straight line formed by the origin and the point (P) may be 5 degrees. φ may be the angle from the positive direction of the x-axis to the straight line formed by the origin (O) and any point (P) projected onto the xy-plane. φ can be greater than or equal to 0 degrees and less than or equal to 360 degrees. The graph in FIG. 14b may be the output value of the first to fourth sensors (24A to 24D) when the OIS moving part (500) is tilted so that the angle (φ) of the reference point (P) increases by a preset value (e.g., 10 degrees).

[0164] Referring to FIG. 14, the first sensor (24A) may be placed in the first quadrant of a coordinate plane where the intersection of the first axis (601) and the second axis (602) is the origin. The second sensor (24B) may be placed in the fourth quadrant of the coordinate plane. The third sensor (24C) may be placed in the second quadrant of the coordinate plane. The fourth sensor (24D) may be placed in the third quadrant of the coordinate plane.

[0165] The distance between each sensor (24A to 24D) and the first axis (601) may be a first distance (a), and the distance between each sensor (24A to 24D) and the second axis (602) may be a second distance (b). For example, the first distance (a) may be smaller than the second distance (b). In another embodiment, the first distance may be larger than the second distance. The first distance (a) and the second distance (b) may not be the same.

[0166] The first to fourth sensors (24A to 24D) may be symmetrically arranged with respect to the first axis (601). Additionally, the first to fourth sensors (24A to 24D) may be symmetrically arranged with respect to the second axis (602).

[0167] Referring to FIG. 15b, when the angle (φ) is between 15 and 45 degrees, the output of the first sensor (24A) and the output of the fourth sensor (24D) are linear, the sensitivity of the sensor is high, the influence of disturbances or errors is low, and it is suitable for OIS feedback control. On the other hand, the output of the second sensor (24B) and the output of the third sensor (24C) are saturated, so the sensitivity of the sensor is low and it may be vulnerable to disturbances or errors, making it difficult to provide feedback control for the OIS moving part (500).

[0168] FIG. 16 shows a flowchart regarding a method for calibrating the correlation between the displacement of the OIS moving part (500) and the outputs of the first to fourth sensors (24A to 24D) according to an embodiment.

[0169] Referring to FIG. 16, output values ​​of the first to fourth sensors (24A to 24D) for the displacement of the OIS moving part (500) are obtained (S110).

[0170] The displacement of the OIS moving part (500) may be the trajectory of the reference point (P) of the OIS moving part (500), as described in FIG. 15a. In FIG. 15a, the angle (θ) is exemplified as 5 degrees, but in other embodiments, (θ) may be 1 degree or more and 10 degrees or less. In yet another embodiment, (θ) may be 0 degrees or more and less than 1 degree.

[0171] Additionally, in FIG. 15a, the preset value for the angle (φ) is 10 degrees, but in other embodiments, the preset value may be 1 to 30 degrees. For example, the output values ​​of the first to fourth sensors (24A to 24D) may be code values ​​or digital values. In other embodiments, the output value of each sensor (24A to 24D) may be the voltage value of each sensor.

[0172] Next, the difference (DA1) (or sum) between the output of the third sensor (24C) and the output of the second sensor (24B) is calculated (S120). Hereinafter, DA1 is defined as "first difference" (or "first sum").

[0173] Next, the difference (DA2) (or sum) between the output of the first sensor (24A) and the output of the fourth sensor (24D) is calculated (S130). Hereinafter, DA2 is defined as "second difference" (or "second sum").

[0174] In steps S120 and S130, the first difference and the second difference may be code values ​​or digital values. In another embodiment, in steps S120 and S130, the first difference and the second difference may be differences in output voltage.

[0175] Next, the arrangement of the first sensor (24A) and the fourth sensor (24D) and the arrangement of the second sensor (24B) and the third sensor (24C) are orthogonalized using a correction function. At this time, the correction function may include a first distance (a), a second distance (b), the sum of the first difference (DA1) and the second difference (DA2) (DA1 + DA2), and the value obtained by subtracting the first difference (DA1) from the second difference (DA2) (-DA1 + DA2). For example, the correction function may include Equation 1. Using Equation 1, the first component value (ING1) and the second component value (ING2) can be obtained (S140).

[0176] Equation 1 may be a "correction function," "correction vector," or "correction parameter" for increasing linearity by adjusting the direction (slope) of the input vector. Equation 1 may be for orthogonal vector transformation to match or align the arrangement of the first sensor (24A) and the fourth sensor (24D) (e.g., the first line (604)) and the arrangement of the second sensor (24B) and the third sensor (24C) (e.g., the second line (605)) with the drive shafts (601, 602).

[0177] The first to fourth sensors (24A to 24D) are symmetrically arranged with respect to the first axis (601) and the second axis (602), respectively, but when the OIS moving part (500) moves with respect to the driving axis (601, 602), the values ​​received by the first to fourth sensors (24A to 24D) are not orthogonal in terms of signals. That is, the first to fourth sensors (24A to 24D) are arranged non-orthogonally so as not to coincide with or align with the driving axis (601, 602). Equation 1 is for scale correction according to a specific direction to restore to an orthogonal coordinate system that coincides with or aligns with the driving axis (601, 602). k may represent the degree to which correction is required in a tilted coordinate system.

[0178] [Mathematical Formula 1]

[0179]

[0180] a may be the distance from the center (603) to each sensor (24A to 24D) in the direction of the second axis. a may be the first distance. Or a may be the distance from the first axis (601) to each sensor (24A to 23D) in the direction of the second axis. Or a may be the distance from the first axis (601) to the center of each sensor (24A to 23D) in the direction of the second axis. For example, the distances from the first axis (601) to the sensors (24A to 24D) in the direction of the second axis may be equal to each other. k may be for orthogonal change.

[0181] b may be the distance from the center (603) to each sensor (24A to 24D) in the direction of the first axis. b may be the second distance. Or b may be the distance from the second axis (602) to each sensor (24A to 23D) in the direction of the first axis. Or b may be the distance from the second axis (602) to the center of each sensor (24A to 23D) in the direction of the first axis. For example, the distances from the second axis (602) to the sensors (24A to 24D) in the direction of the first axis may be equal to each other.

[0182] In the embodiment, the coordinates of the first to fourth sensors (24A to 24D) do not coincide with or align with the drive shaft (601, 602), so the coordinates of the drive shaft and the values ​​received by the first to fourth sensors (24A to 24D) are not orthogonal.

[0183] In addition, the arrangement of the first to fourth sensors (24A to 24D) is not orthogonal to each other. That is, the first straight line (604) connecting the center of the first sensor (24A) and the center of the fourth sensor (24D) and the second straight line (605) connecting the center of the second sensor (24B) and the third sensor (24C) are not orthogonal to each other. When the first straight line (604) and the second straight line (605) are defined as control axes for controlling the displacement of the OIS moving part (500), the control axes are not orthogonal to each other. For example, the "center of the sensor" may be the spatial center of the sensor or the center of the surface of the sensor facing the magnet unit (40A to 40D).

[0184] In the embodiment, to facilitate control by OIS feedback drive and to increase reliability, the first difference (DA1) and the second difference (DA2) are processed using "Equation 1" to obtain the effect of the control axes being orthogonal, and the first component value (ING1) and the second component value (ING2) are obtained according to the processed result.

[0185] Next, the arctangent value (SV) of the first component value (ING1) and the second component value (ING2) is obtained (S150). A single calibration value (SV) regarding the output values ​​of the first to fourth sensors (24A to 24D) can be obtained using Equation 2. Since the first component value (ING1) and the second component value (ING2) are sine or cosine functions of the curve, the arctangent value (SV) of the first component value (ING1) and the second component value (ING2) is used for linearization in the embodiment.

[0186] [Mathematical Formula 2]

[0187] SV = arctan2(ING1, ING2)

[0188] Next, the acquired arctangent value (SV) is stored as a calibration value regarding the output of the OIS position sensor (24) for the displacement of the OIS moving part (500) (S160). Additionally, the code value (or digital value) of the output of the first to fourth sensors (24A to 24D) corresponding to the acquired arctangent value (SV) may be stored. The arctangent value (SV) may be stored as a code value or a digital value. The arctangent value (SV) and the code value of the output of each of the first to fourth sensors (24A to 24D) corresponding to the acquired arctangent value (SV) may be stored in the control unit (830) or in a memory provided separately from the control unit (830). At this time, the code value may be an analog-to-digital converted value of the output of each of the first to fourth sensors (24A to 24D).

[0189] FIG. 17 shows the calibration value (SV) corresponding to the displacement of the OIS moving part (500) and the code values ​​of the first to fourth sensors (24A to 24B). Referring to FIG. 17, the calibration value (SV) and the code values ​​of the first to fourth sensors (24A to 24B) may be stored in the control unit (830) or memory as a mathematical formula or algorithm. Alternatively, the calibration value (SV) and the code values ​​of the first to fourth sensors (24A to 24B) may be stored in the form of a lookup table.

[0190] FIG. 18a shows graphs of the first difference (DA1) and the second difference (DA2) according to the displacement of the OIS moving part (500), and FIG. 18b shows graphs of the first difference (DA1) and the second difference (DA2) corresponding to the displacement of the OIS moving part (500) displayed on a coordinate plane.

[0191] Referring to FIG. 18a, the graphs of the first difference (DA1) and the second difference (DA2) show improved linearity compared to the graphs of the outputs of each of the sensors (24A to 24D) in FIG. 15b, but there are still non-linear sections.

[0192] Referring to FIG. 18b, the coordinates (DA1, DA2) for the displacement (e.g., φ=0 degrees, 10 degrees, 20 degrees,.....350 degrees) of the OIS moving part (500) appear in the shape of an ellipse. This is because, as shown in FIG. 14, the first straight line (604) connecting the center of the first sensor (24A) and the center of the fourth sensor (24D) and the second straight line (605) connecting the center of the second sensor (24B) and the center of the third sensor (24C) are not orthogonal to each other. In other words, this is because the first to fourth sensors (24A, 24B) are not aligned with the first axis (601) and the second axis (602), which are the driving axes.

[0193] FIG. 19a is a graph showing the first difference (DA1) and the second difference (DA2) corresponding to the displacement of the OIS moving part (500) on a coordinate plane, and FIG. 19b is a graph showing the first component value (ING1) and the second component value (ING2) according to the displacement of the OIS moving part (500) on a coordinate plane. FIG. 18a and FIG. 18b show graphs when the angle (θ) is 1 degree, 2 degrees, 3 degrees, 4 degrees, and 5 degrees. In FIG. 19a, the coordinate values ​​are in the shape of an ellipse, and in FIG. 19b, the coordinate values ​​are in the shape of a circle.

[0194] FIG. 20 shows the calibration value (SV) according to the displacement of the OIS moving part (500).

[0195] g11 represents the calibration result according to the comparison example, and g12 represents the calibration result different from the example. g11 represents the value of arctan2(DA1, DA2). g11 represents the calibration result without applying orthogonal vector transformation.

[0196] Referring to FIG. 20, a non-linear section exists in g11. The sensors (24A to 24D) are not aligned with or overlapped with the drive axes (601, 602), are offset from the drive axes (601, 602), and the control axes (604, 605) are not orthogonal to each other. In this case, even if the displacement (or trajectory) of the OIS moving part (500) becomes circular, the coordinates (DA1, DA2) for the displacement of the OIS moving part (500) (e.g., φ=0 degrees, 10 degrees, 20 degrees, ... 350 degrees) appear in an elliptical shape, as described in FIG. 18b and FIG. 19a. In this elliptical shape, the linearity of the calibration value according to the displacement of the OIS moving part (500) deteriorates, making control complex or impossible.

[0197] In the embodiment, to eliminate this nonlinearity, a first component value (ING1) and a second component value (ING2) are calculated through steps S140 and S150 so that the control axes (604, 605) have the effect of being orthogonal to each other, and the arctangent value (SV) of the first and second component values ​​(ING1, ING2) can be set as a calibration value, and in g12, there is almost no nonlinear section and linearity can be improved. As a result, in the embodiment, control by OIS feedback drive can be facilitated and the reliability of OIS feedback drive can be increased.

[0198] FIG. 21 shows a feedback control method of the OIS moving part (500) according to an embodiment.

[0199] Referring to FIG. 21, the control unit (830) receives or sets a target value corresponding to the target position of the OIS moving unit (500) (S210). At this time, the target position may be the position of the OIS moving unit (500) to be moved. The target value may be a calibration value (SV) corresponding to the target position. For example, referring to FIG. 17, when the target position of the OIS moving unit (500) is θ 5 degrees and φ 10 degrees, the target value may be SV2. The target value may be a code value or a digital value.

[0200] Next, the control unit (830) receives the output of the first sensor (24A), the output of the second sensor (24B), the output of the third sensor (24C), and the output of the fourth sensor (24D), and obtains a displacement value using an algorithm (S220). The control unit (830) can store the algorithm.

[0201] The algorithm may include a step of calculating a first difference between the output of the received first sensor (24A) and the output of the fourth sensor (24D), and a second difference between the output of the received second sensor (24B) and the output of the third sensor (24C).

[0202] The algorithm may include a correction function for orthogonal vectorization. In this case, the correction function may be applied as described in step S140. That is, the algorithm may include a step of calculating a first component value (ING1) and a second component value (ING2) using Equation 1 of S140.

[0203] The algorithm may include a step of obtaining a displacement value using Equation 2 of S150. In this case, the displacement value may be "SV" of Equation 2.

[0204] For example, the control unit (830) may receive the output of each of the first to fourth sensors (24A to 24D) and convert the received output from analog to digital to generate a code value (or digital value) corresponding to the output of each sensor. For example, the first difference, the second difference, the first component value (ING1), the second component value (ING2), and the displacement value may be code values ​​or digital values.

[0205] Next, the control unit (830) adjusts or controls the driving signals supplied to the OIS coil units (50A to 50D) using the target value and the displacement value (S230).

[0206] For example, the control unit (830) can compare the displacement value and the target value, and adjust or control the driving signals of the first to fourth coil units (50A to 50D) so that the displacement value converges to or matches the target value.

[0207] In the embodiment, the linearity of the mutual relationship between the displacement of the OIS moving part (500) and the outputs of the first to fourth sensors (24A to 24D) can be improved, and as a result, the ease of driving the OIS feedback can be improved and the reliability can be improved.

[0208] In addition, the camera device (200) according to the embodiment may be included in an optical instrument that aims to increase the visual acuity of the eye by using light characteristics such as reflection, refraction, absorption, interference, and diffraction to form an image of an object in space, or to record and reproduce an image by a lens, or to perform optical measurement, propagation or transmission of an image, etc. For example, the optical instrument according to the embodiment may be a mobile phone, a smartphone, 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, or a vehicle camera device, but is not limited thereto, and any device for taking images or photos is possible.

[0209] FIG. 22a shows a perspective view of an optical device (200A) according to an embodiment, FIG. 22b shows a perspective view of an optical device (200X) according to another embodiment, and FIG. 23 shows a configuration diagram of the optical device (200A) shown in FIG. 22a and FIG. 22b.

[0210] The camera device (200) included in the embodiment of FIG. 22a may be a front camera device in which the lens module (400) is positioned to face the front of the body (850). The camera device (200) included in the embodiment of FIG. 22b may be a rear camera device in which the lens module (400) is positioned to face the rear of the body (850) of the optical device (200A). FIG. 22b illustrates an example in which two rear camera devices are positioned, but in other embodiments, one or more rear camera devices may be positioned. In other embodiments, the camera device (200) may be used for both the front camera device and the rear camera device.

[0211] Referring to FIGS. 22a, 22b, and 23, 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).

[0212] The body (850) is in the form of a bar, but is not limited thereto, and can be of various structures such as a slide type, folder type, swing type, swivel type in which two or more sub-bodies are combined to move relative to each other.

[0213] The wireless communication unit (710) may be configured to include one or more modules that enable wireless communication between the optical device (200A) and the wireless communication system or between the optical device (200A) and the network where the optical device (200A) is located. For example, the wireless communication unit (710) may be configured to include a broadcast reception module (711), a mobile communication module (712), a wireless internet module (713), a short-range communication module (714), and a location information module (715).

[0214] The A / V (Audio / Video) input unit (720) is for inputting an audio signal or a video signal and may include a camera (721) and a microphone (722), etc. The camera (721) may include a camera device (200) according to the embodiment.

[0215] The sensing unit (740) can generate a sensing signal to control the operation of the optical device (200A) by detecting the current state of the optical device (200A), such as the open / closed state of the optical device (200A), the position of the optical device (200A), whether there is user contact, the orientation of the optical device (200A), and the acceleration / deceleration of the optical device (200A). For example, if the optical device (200A) is in the form of a slide phone, it can sense whether the slide phone is open or closed. In addition, it is responsible for sensing functions related to whether power is supplied by the power supply unit (790) and whether an external device is connected to the interface unit (770).

[0216] The input / output unit (750) is intended to generate input or output related to sight, hearing, or touch. The input / output unit (750) can generate input data for controlling the operation of the optical device (200A) and can also display information processed by the optical device (200A).

[0217] The input / output unit (750) may include a keypad unit (730), a display module (751), an audio output module (752), and a touch screen panel (753). The keypad unit (730) may generate input data by keypad input.

[0218] The display module (751) may include a plurality of pixels whose color changes according to an electrical signal. For example, the display module (751) may include at least one of a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, and a 3D display.

[0219] The sound output module (752) can output audio data received from the wireless communication unit (710) in call signal reception, call mode, recording mode, voice recognition mode, or broadcast reception mode, or output audio data stored in the memory unit (760).

[0220] The touch screen panel (753) can convert a change in capacitance caused by a user's touch on a specific area of ​​the touch screen into an electrical input signal.

[0221] The memory unit (760) may store a program for processing and controlling the control unit (780), and may temporarily store input / output data (e.g., phone book, message, audio, still image, photo, video, etc.). For example, the memory unit (760) may store an image captured by the camera (721), such as a photo or video.

[0222] The interface section (770) serves as a passage connecting to an external device connected to the optical device (200A). The interface section (770) receives data from the external device, supplies power to transmit it to each component inside the optical device (200A), or allows data inside the optical device (200A) to be transmitted to the external device. For example, the interface section (770) may include a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device equipped with an identification module, an audio I / O (Input / Output) port, a video I / O (Input / Output) port, and an earphone port.

[0223] A controller (780) can control the overall operation of an optical device (200A). For example, the controller (780) can perform related control and processing for voice calls, data communication, video calls, etc. The controller (780) may be equipped with a multimedia module (781) for multimedia playback. The multimedia module (781) may be implemented within the controller (780) or may be implemented separately from the controller (780). The controller (780) can perform pattern recognition processing to recognize handwriting input or drawing input performed on a touchscreen as characters and images, respectively.

[0224] The power supply unit (790) can receive external power or internal power under the control of the control unit (780) and supply power necessary for the operation of each component.

[0225] The features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment may be combined or modified and implemented in other embodiments by a person skilled in the art to which the embodiments belong. Therefore, details regarding such combinations and modifications should be interpreted as being included within the scope of the present invention.

[0226] The embodiment can be used in camera devices and optical devices where the processing load of the processing unit can be reduced because calibration is easy and simple.

Claims

1. Fixed part; A moving part including an image sensor; A coil that moves the moving part around a first axis or a second axis perpendicular to the first axis; A position sensor for detecting the displacement of the above-mentioned moving part; and It includes a control unit that controls the driving signal of the above coil, and The above position sensor includes a first sensor positioned in the first quadrant of a coordinate plane where the intersection point of the first axis and the second axis is the origin, a second sensor positioned in the fourth quadrant of the coordinate plane, a third sensor positioned in the second quadrant of the coordinate plane, and a fourth sensor positioned in the third quadrant of the coordinate plane. The first distance between the first axis and each of the first to fourth sensors is different from the second distance between the second axis and each of the first to fourth sensors, and The control unit includes a correction function for orthogonalizing the arrangement of the first sensor and the fourth sensor and the arrangement of the second sensor and the third sensor, and A camera device in which the above correction function includes the first distance, the second distance, the sum of the first difference and the second difference, and the value obtained by subtracting the first difference from the second difference, wherein the first difference is the difference between the output of the first sensor and the output of the fourth sensor, and the second difference is the difference between the output of the second sensor and the output of the third sensor.

2. In Paragraph 1, The above correction function includes mathematical formula 1, and [Mathematical Formula 1] A camera device in which k is a correction vector, a is the first distance, b is the second distance, DA1 is the first difference, and DA2 is the second difference.

3. In Paragraph 2, The above control unit calculates displacement values ​​corresponding to the outputs of the first to fourth sensors using mathematical formula 2, and [Mathematical Formula 2] SV= arctan2(ING1, ING2), A camera device in which SV is the above displacement value, ING1 is a(-DA1+DA2), and ING2 is b(DA1+DA2).

4. In Paragraph 1, A first magnet unit and a second magnet unit spaced apart in a direction parallel to the second axis on the first side of either the moving part or the fixed part; and It includes a third magnet unit and a fourth magnet unit spaced apart in a direction parallel to the second axis on the second side of either of the moving part and the fixed part, and A camera device in which the first sensor detects the first magnet unit, the second sensor detects the second magnet unit, the third sensor detects the third magnet unit, and the fourth sensor detects the fourth magnet unit.

5. In Paragraph 4, A camera device comprising first to fourth coil units corresponding to the first to fourth magnet units in a direction parallel to the first axis.

6. In Paragraph 5, The above control unit is a camera device that stores a calibration value obtained using mathematical formula 1 and mathematical formula 2, corresponding to the displacement of the moving part.

7. In Paragraph 6, A camera device in which the above-described control unit sets a target value, compares the displacement value with the target value, and adjusts or controls the driving signals of the first to fourth coil units so that the displacement value converges to or matches the target value.

8. In Paragraph 1, It includes a rolling member disposed between the fixed part and the moving part, and The above cloud member is, First and second balls arranged to overlap with the first axis; and A camera device comprising third and fourth balls arranged to overlap with the second axis.

9. In Paragraph 1, A camera device in which the first distance is smaller than the second distance.

10. In Paragraph 1, The first to fourth sensors are symmetrically arranged with respect to the first axis and the second axis, and A camera device in which the first straight line connecting the center of the first sensor and the center of the fourth sensor and the second straight line connecting the center of the second sensor and the center of the third sensor are not orthogonal.

Images