Actuator for camera module and initial setting method of camera module

Abstract

An actuator for a camera module is provided. The actuator for a camera module according to an aspect of the present invention may comprise: a housing; an AF carrier accommodated in the housing; an OIS carrier including a guide surface protruding from a first side surface parallel to the optical axis in a first direction perpendicular thereto; a driving unit including magnets and driving coils corresponding to each other; and position detection sensors disposed at the driving coil side, wherein the guide surface is a horizontal surface the length of which parallel to the optical axis is shorter than the length perpendicular thereto.

Description

Actuator for camera module and initial setup method for camera module

[0001] The present invention relates to an actuator for a camera module and an initial setting method for a camera module.

[0002] Recently, portable electronic devices such as mobile phones have been equipped with built-in camera modules. These camera modules feature autofocus (AF) and optical image stabilization (OIS) functions.

[0003] A representative method for implementing AF or OIS functions is to install a magnet on a moving body (e.g., a carrier) and a coil on a fixed body (e.g., a housing or other carrier), thereby moving the moving body in the direction of the optical axis or in a direction perpendicular to the optical axis by utilizing the electromagnetic force generated between the coil and the magnet.

[0004] That is, the moving body can move in the desired direction through the rolling motion of the ball member while continuously maintaining an appropriate distance from the fixed body through the spherical ball member placed between the moving body and the fixed body.

[0005] For example, an OIS carrier for hand shake correction can correct shaking of the lens module caused by hand shake by moving in a direction perpendicular to the optical axis through the rolling movement of the ball member while being stacked on the AF carrier.

[0006] However, if the OIS carrier is stacked on the AF carrier so that it can move without direction restrictions with respect to the AF carrier, the OIS carrier may have a rotational component when moving in a straight line.

[0007] That is, the OIS carrier has a problem in that it cannot move in a straight line when moving in a straight line, but moves along a path similar to a straight line due to the rotational component.

[0008] Accordingly, there is a problem in that the initial setting work for compensating for shaking of the lens module mounted on the OIS carrier is performed inaccurately.

[0009] This ultimately causes the lens module shake compensation due to hand tremors to not be performed accurately.

[0010] The present invention is intended to solve the above problems, and the purpose of the present invention is to provide an actuator for a camera module and an initial setting method for a camera module that can accurately perform initial settings for correcting shake of a lens module even when an OIS carrier for correcting shake of a lens module is stacked on an AF carrier so that the carrier can move without direction restrictions.

[0011] The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0012] According to one aspect of the present invention, there is provided an actuator for a camera module, comprising: a housing; an AF carrier accommodated in the housing so as to be movable along an optical axis direction; an OIS carrier disposed on the AF carrier so as to be movable in a direction perpendicular to the optical axis and including a guide surface protruding in a first direction perpendicular to the optical axis from a first side parallel to the optical axis; a driving unit disposed between the OIS carrier and the housing and including a magnet and a driving coil corresponding to each other so as to provide a driving force for moving the OIS carrier; and three or more position detection sensors disposed on the driving coil side so as to detect movement of the magnets; wherein the position detection sensors include two first detection sensors disposed to face a second side parallel to the optical axis and perpendicular to the first side, and wherein the guide surface is formed as a horizontal plane in which a length formed in a direction parallel to the optical axis direction is shorter than a length formed in a direction perpendicular to the optical axis direction.

[0013] In addition, the guide surface may be formed as a horizontal plane that extends integrally along a second direction that is perpendicular to both the optical axis direction and the first direction while being located at the center of the first side.

[0014] In addition, the actuator for the camera module may further include a memory unit that stores linear position information of the OIS carrier, and the memory unit may store first position information of the OIS carrier in a second direction generated by moving the OIS carrier along a second direction that is perpendicular to both the optical axis direction and the first direction while the guide surface is in close contact with the housing or the AF carrier, second position information of the OIS carrier in the first direction generated by moving the OIS carrier along the first direction based on the first position information, and third position information of the OIS carrier in which the center of the OIS carrier coincides with the optical axis based on the first position information and the second position information.

[0015] In addition, the actuator for the camera module may further include a control unit for controlling the driving unit, and the control unit may control the position of the OIS carrier by comparing linear position information of the OIS carrier previously stored in the memory unit with real-time position information of the OIS carrier detected from the position detection sensor.

[0016] In addition, the magnet may include a first magnet disposed on the second side so as to face the two first detection sensors, a second magnet disposed on a third side that is parallel to the optical axis and perpendicular to the second side, and a third magnet disposed on the AF carrier so as to be parallel to the guide surface.

[0017] Additionally, the OIS carrier may be arranged so that the first side faces the inner side of the surface on which the third magnet is mounted in the AF carrier.

[0018] In addition, the guide surface may be formed to have a symmetrical shape along the second direction with respect to the center of the first side on the first side.

[0019] Additionally, the first side may include a first portion and a second portion that protrudes further in the first direction than the first portion, and the guide surface may be formed to be positioned in the second portion.

[0020] Additionally, the position detection sensor may be a Hall sensor.

[0021] Additionally, the position detection sensor may be formed integrally with the driving chip.

[0022] Meanwhile, according to another aspect of the present invention, there is provided an initial setting method for image stabilization of a camera module including an AF carrier, an OIS carrier arranged on the AF carrier so as to directly face one side of the AF carrier, and a housing accommodating the AF carrier and the OIS carrier, the initial setting method including a first step of moving the OIS carrier in a first direction perpendicular to an optical axis, so that the AF carrier or the housing and the OIS carrier are in close contact with each other, and linearly moving the OIS carrier along a second direction both perpendicular to the optical axis and the first direction, and generating first position information of the OIS carrier with respect to the second direction; a second step of linearly moving the OIS carrier along the first direction based on the first position information, and generating second position information of the OIS carrier with respect to the first direction; and a third step of generating third position information in which the center of the OIS carrier coincides with the optical axis based on the first position information and the second position information.

[0023] In addition, the OIS carrier may include a guide surface that protrudes in a first direction perpendicular to the optical axis from a first side parallel to the optical axis, and the guide surface may be formed as a horizontal plane whose length formed in a direction parallel to the optical axis is shorter than its length formed in a direction perpendicular to the optical axis, and the first step may be performed in a state where the guide surface is in close contact with one side of the AF carrier or one side of the housing.

[0024] Additionally, the guide surface may be formed as a horizontal surface extending integrally along the second direction while being located at the center of the first side.

[0025] In addition, the guide surface may be formed to have a symmetrical shape along the second direction with respect to the center of the first side on the first side.

[0026] In addition, the first step may be performed in a state where the rotation of the OIS carrier moving in a straight line along the second direction is suppressed, and in the first step, the rotation of the OIS carrier may be suppressed based on information obtained through two first detection sensors arranged to face a second side that is parallel to the optical axis and perpendicular to the first side.

[0027] In addition, the second step can be performed by moving the OIS carrier in a straight line along the first direction while the center of the OIS carrier is located at the center of the entire operating range of the OIS carrier in the second direction based on the first location information.

[0028] Additionally, the second location information can be generated through a second detection sensor arranged to face a third side that is parallel to the optical axis and perpendicular to the second side.

[0029] According to the above configuration, the actuator for a camera module according to the present invention can accurately perform an initial setting operation for shake correction by allowing the OIS carrier to move in a straight line while maintaining physical contact with a fixed body through a guide surface during the initial setting for correcting shake of the lens module.

[0030] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the composition of the invention described in the claims.

[0031] FIG. 1 is a drawing showing an actuator for a camera module according to one embodiment of the present invention.

[0032] Figure 2 is a drawing showing the main components separated from Figure 1.

[0033] Figure 3 is a drawing of Figure 2 viewed from below.

[0034] FIG. 4 is a drawing of an OIS carrier and an AF carrier extracted from an actuator for a camera module according to one embodiment of the present invention.

[0035] Figure 5 is a drawing of Figure 4 viewed from below.

[0036] FIG. 6 is a plan view showing an OIS carrier applied to an actuator for a camera module according to one embodiment of the present invention.

[0037] Figure 7 is a drawing of Figure 6 viewed from the front.

[0038] FIG. 8 is a drawing schematically showing the arrangement relationship between a guide surface and a position detection sensor in an actuator for a camera module according to one embodiment of the present invention.

[0039] Fig. 9 is a modified example of Fig. 8.

[0040] FIG. 10 is a block diagram schematically showing the connection relationship between an actuator for a camera module and a control unit according to one embodiment of the present invention.

[0041] Figure 11 is a flowchart showing an initial setting method for compensation of camera shake of a camera module according to one embodiment of the present invention.

[0042] Figure 12 is a schematic diagram showing the first step in Figure 11.

[0043] Figure 13 is a schematic diagram showing the second step in Figure 11.

[0044] Figure 14 is a schematic diagram showing the third step in Figure 11.

[0045] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts irrelevant to the description are omitted in the drawings, and the same reference numerals are assigned to identical or similar components throughout the specification.

[0046] The words and terms used in this specification and claims should not be construed as limited to their ordinary or dictionary meanings, but should be interpreted in a way that is consistent with the technical idea of ​​the present invention, in accordance with the principles by which the inventor can define terms and concepts in order to best explain his or her invention.

[0047] In addition, the optical axis used in the present specification and claims may mean an axis passing through the center or center point (O) of the OIS carrier while being parallel to the Z-axis in the drawing, the optical axis direction may mean a direction parallel to the Z-axis direction, and the direction perpendicular to the optical axis direction may mean a direction parallel to the X-axis or Y-axis in the drawing.

[0048] In addition, the center or center point (O) of the OIS carrier used in the present specification and claims may mean the center point of a mounting hole (133) formed with a predetermined area in the center of the carrier body (131) so that the lens module (10) can be mounted.

[0049] Additionally, the first direction used in the present specification and claims may mean a direction parallel to the Y-axis, the second direction may mean a direction parallel to the X-axis, and the thickness direction and height direction may mean a direction parallel to the Z-axis.

[0050] In addition, the upper surface used in the present specification and claims may be a surface viewed from above with reference to FIG. 1, the lower surface may be a surface viewed from below with reference to FIG. 1, and the side and circumferential surfaces may mean a surface surrounding the Z axis with the Z axis as the center with reference to FIG. 1.

[0051] An actuator (100) for a camera module according to one embodiment of the present invention can implement both an auto focus adjustment (AF) function that automatically adjusts the focus of the lens module (10) when the lens module (10) is operated, and an optical image stabilization (OIS) function that corrects shaking of the lens module (10) caused by hand shaking of the user.

[0052] That is, the actuator (100) for the camera module according to one embodiment of the present invention can move the lens module (10) along the optical axis direction for autofocus adjustment, and can move the lens module (10) in a direction perpendicular to the optical axis for shake correction.

[0053] At this time, the actuator (100) for the camera module according to one embodiment of the present invention can accurately obtain the position information of the OIS carrier (130) without being affected by rotation even if there is no middle guide for guiding the movement of the OIS carrier (130) moving in a direction perpendicular to the optical axis between the OIS carrier (130) and the AF carrier (120) described later.

[0054] That is, the actuator (100) for a camera module according to one embodiment of the present invention can accurately obtain position information of the OIS carrier (130) for initial setting without being affected by rotation even when the OIS carrier (130) moves in a direction perpendicular to the optical axis while being stacked so that the OIS carrier (130) directly faces one surface of the AF carrier (120).

[0055] Through this, the actuator (100) for the camera module according to one embodiment of the present invention can accurately perform the initial setting of the OIS carrier (130) for the shake correction function.

[0056] To this end, an actuator (100) for a camera module according to one embodiment of the present invention may include a housing (110), an AF carrier (120), an OIS carrier (130), a driving unit, and a position detection sensor (150) as shown in FIGS. 1 to 3.

[0057] The housing (110) may be formed in a body shape having an internal space (111). For example, the housing (110) may be formed in a body shape having an internal space (111) with an open upper portion.

[0058] Accordingly, the housing (110) can accommodate the AF carrier (120) and the OIS carrier (130) in the internal space (111), and the AF carrier (120) and the OIS carrier (130) can move through the driving force provided by the driving unit while being accommodated in the internal space (111).

[0059] For example, the AF carrier (120) can move along the Z-axis direction, which is the optical axis direction, together with the OIS carrier (130) while being accommodated in the internal space (111), and the OIS carrier (130) can move along a direction perpendicular to the optical axis direction while being accommodated in the internal space (111).

[0060] To this end, the housing (110) may include a bottom plate (112) and a side wall (113) extending upward along the edge of the bottom plate (112) by a certain length, and the internal space (111) may be defined by the bottom plate (112) and the side wall (113).

[0061] Here, the OIS carrier (130) can be inserted into the internal space (111) while the lens module (10) is mounted, and the lens module (10) can include a plurality of lenses (not shown) for photographing a subject, and the lens module (10) can be mounted in the central portion of the OIS carrier (130).

[0062] In this case, a cover member (117) may be combined on one side of the housing (110) to prevent the OIS carrier (130) and AF carrier (120) accommodated in the internal space (111) from being separated to the outside.

[0063] For example, the cover member (117) may be coupled to the side wall (113) so as to cover the open upper portion of the internal space (111), and the cover member (117) may include a first opening (117a) formed through the central portion so that the lens module (10) may pass through.

[0064] Accordingly, when the cover member (117) is coupled to one side of the housing (110) while the OIS carrier (130) and the AF carrier (120) are inserted into the internal space (111), the lens module (10) can be exposed to the outside through the first opening (117a), and the OIS carrier (130) and the AF carrier (120) can be prevented from being separated from the internal space (111) to the outside through the cover member (117).

[0065] Here, the cover member (117) can perform the function of preventing the OIS carrier (130) and the AF carrier (120) from being separated from the internal space (111) to the outside, and can also perform the function of protecting the housing (110), the OIS carrier (130), and the AF carrier (120) from the external environment.

[0066] In addition, the cover member (117) may also perform the function of shielding electromagnetic waves.

[0067] For example, the cover member (117) may be made of a plastic material, but the cover member (117) may be made of a metal material and be grounded to the ground pad of the circuit board.

[0068] Through this, the cover member (117) can shield electromagnetic waves generated from electronic components.

[0069] Additionally, the housing (110) may include a second opening (114) formed to penetrate the floor plate (112) with a predetermined area.

[0070] Such a second opening (114) can serve as a passage for providing light incident through the lens module (10) to an image sensor (not shown), and the image sensor can detect light incident through the lens module (10) and convert it into an electric signal.

[0071] For example, the image sensor may be an imaging device such as a CCD or CMOS.

[0072] At this time, the housing (110) may include a plurality of placement holes (115) formed to penetrate the side wall (113).

[0073] For example, the side wall (113) may be a ring-shaped rectangular cross-section having four sides, and the placement hole (115) may be formed on three of the four sides constituting the side wall (113).

[0074] Here, the above-mentioned placement hole (115) may be formed to penetrate the side wall (113) with a predetermined area as shown in FIGS. 2 and 3, or may be formed to have one side open.

[0075] Such a placement hole (115) may be a space where the driving coils (142, 143, 144) constituting the driving unit are placed, and the driving coils (142, 143, 144) constituting the driving unit may directly face the corresponding magnets (145, 146, 147) through the plurality of placement holes (115).

[0076] Accordingly, while forming the driving unit, the corresponding driving coils (142, 143, 144) and magnets (145, 146, 147) can be arranged to directly face each other through the arrangement hole (115), and the corresponding magnets (145, 146, 147) and driving coils (142, 143, 144) facing each other through the arrangement hole (115) can generate electromagnetic force to move the AF carrier (120) and / or the OIS carrier (130) in a desired direction. A detailed description thereof will be provided later.

[0077] The above AF carrier (120) can be placed in the internal space (111) so as to be able to move along the optical axis direction while being accommodated in the internal space (111) as described above.

[0078] In this case, the OIS carrier (130) can be stacked on the AF carrier (120) so as to directly face the AF carrier (120) while the lens module (10) is mounted in the central portion, and can move along the Z-axis direction together with the AF carrier (120).

[0079] Accordingly, when the AF carrier (120) moves along the Z-axis direction, which is the optical axis direction, with respect to the housing (110) while being accommodated in the internal space (111), the OIS carrier (130) equipped with the lens module (10) can also move along the Z-axis direction together with the AF carrier (120).

[0080] Through this, the focus of the lens module (10) can be adjusted through movement of the AF carrier (120).

[0081] That is, the AF carrier (120) can implement the autofocus function of the lens module (10) by moving along the Z-axis direction, which is the optical axis direction, with respect to the housing (110), which is a fixed body, while being accommodated in the internal space (111).

[0082] In other words, in the relative relationship between the AF carrier (120) and the housing (110), the housing (110) may be a fixed body and the AF carrier (120) may be a movable body.

[0083] Such an AF carrier (120) can move along the Z-axis direction through electromagnetic force provided from the driving unit.

[0084] That is, the AF carrier (120) can move along the Z-axis direction through the electromagnetic force generated by the third magnet (147) and the third driving coil (144) corresponding to each other among the driving units.

[0085] In this case, the third magnet (147) can be mounted on one side of the AF carrier (120), the third drive coil (144) can be mounted on one side of a circuit board (141) arranged to surround the side wall (113) of the housing (110), and the third drive coil (144) can be arranged to face the third magnet (147) through the third arrangement hole (115c) among the plurality of arrangement holes (115).

[0086] To this end, the AF carrier (120) may include a base plate (121) having a roughly square shape and a plate-shaped mounting plate (122) extending upward from the edge of the base plate (121) to a certain height, and the third magnet (147) may be fixed to one surface of the mounting plate (122).

[0087] Accordingly, when the AF carrier (120) is inserted into the internal space (111), the third drive coil (144) can be arranged to directly face the third magnet (147) mounted on the mounting plate (122) through the third arrangement hole (115c), and the AF carrier (120) can move along the Z-axis direction through the electromagnetic force generated by the third drive coil (144) and the third magnet (147).

[0088] Here, the AF carrier (120) may include a plurality of restraining members (123) extending upward at a certain height on the four corners of the base plate (121).

[0089] A plurality of such restraint members (123) can be laminated on the base plate (121) together with the mounting plate (122) to limit the movement range of the OIS carrier (130) that moves in a direction perpendicular to the optical axis direction.

[0090] At this time, when power is applied to the third drive coil (144), the AF carrier (120) can move smoothly along the Z-axis direction with respect to the housing (110) through a plurality of first ball members (171).

[0091] Here, the plurality of first ball members (171) may be provided in a spherical shape so as to be capable of rolling motion. Such a plurality of first ball members (171) can smoothly move the AF carrier (120) in a desired direction through rolling motion while reducing the frictional force between the AF carrier (120) and the housing (110).

[0092] For example, the plurality of first ball members (171) can smoothly move the AF carrier (120) in a straight line along the Z-axis direction, which is the optical axis direction, while reducing the frictional force between the AF carrier (120) and the housing (110) when the AF carrier (120) is accommodated in the internal space (111).

[0093] To this end, the plurality of first ball members (171) may be arranged along the Z-axis direction while being positioned between one surface of the AF carrier (120) and one surface of the housing (110) facing each other.

[0094] In this case, as shown in FIGS. 2 to 5, the AF carrier (120) may include a first guide groove (124) that is formed inwardly from one side, and the housing (110) may include a second guide groove (116) that is formed inwardly on one side facing the first guide groove (124).

[0095] For example, the first guide groove (124) may be formed to be drawn inward from the outer surface of the mounting plate (122), and the second guide groove (116) may be formed to be drawn inward from the inner surface of the side wall (113) of the housing (110) that faces the mounting plate (122).

[0096] Here, each of the first guide groove (124) and the second guide groove (116) may be formed on the outer surface of the mounting plate (122) and the inner surface of the side wall (113) of the housing (110) facing the mounting plate (122) so as to extend a certain length along the Z-axis direction.

[0097] The first guide groove (124) and the second guide groove (116) can be arranged to face each other while the AF carrier (120) is accommodated in the internal space (111).

[0098] Accordingly, the plurality of first ball members (171) can be arranged along the Z-axis direction while being positioned between the first guide groove (124) and the second guide groove (116) facing each other.

[0099] Through this, when an electromagnetic force is generated between the third drive coil (144) and the third magnet (147), the AF carrier (120) can smoothly move along the Z-axis direction through the rolling motion of the plurality of first ball members (171) arranged between the first guide groove (124) and the second guide groove (116), and the OIS carrier (130) stacked on the AF carrier (120) can move along the Z-axis direction together with the AF carrier (120).

[0100] Due to this, the lens module (10) coupled to the OIS carrier (130) can also automatically adjust its focus by moving along the Z-axis direction.

[0101] Here, the plate-shaped yoke member (173) made of a metal material may be positioned to correspond to the third magnet (147). For example, the yoke member (173) may be positioned on the opposite side of the surface on which the third driving coil (144) is mounted on the circuit board (141) on which the third driving coil (144) is mounted, and may be fixed to the side of the housing (110) together with the circuit board (141).

[0102] When the yoke member (173) is positioned so that the first ball member (171) faces each other between the first guide groove (124) and the second guide groove (116), an attractive force can be generated with the third magnet (147).

[0103] Accordingly, the AF carrier (120) can move toward the side of the housing (110) by the attractive force generated between the third magnet (147) and the yoke member (173) while being accommodated in the internal space (111), and the first ball member (171) can maintain a state of contact with the first guide groove (124) and the second guide groove (116) while being positioned between the first guide groove (124) and the second guide groove (116) facing each other.

[0104] Through this, the AF carrier (120) is always kept in contact with the first ball member (171) through the attractive force generated between the third magnet (147) and the yoke member (173), so that when driving force is provided from the driving unit, the AF carrier (120) can move smoothly along the Z-axis direction through the rolling motion of the plurality of first ball members (171).

[0105] As described above, the OIS carrier (130) may have a lens module (10) mounted in the central portion, and may be stacked on the AF carrier (120) so as to be able to move in a direction perpendicular to the optical axis with respect to the AF carrier (120).

[0106] For example, the OIS carrier (130) can move along at least one of a first direction perpendicular to the optical axis (a direction parallel to the Y-axis direction) and a second direction (a direction parallel to the X-axis).

[0107] To this end, the OIS carrier (130) may be positioned in the internal space (111) together with the AF carrier (120) and may be stacked on the AF carrier (120).

[0108] In this case, the actuator (100) for the camera module according to one embodiment of the present invention may further include a stopper member (160) coupled to the upper side of the OIS carrier (130), and the stopper member (160) may be fastened to the AF carrier (120) disposed on the lower side of the OIS carrier (130) in a state in which the OIS carrier (130) is stacked on the AF carrier (120).

[0109] Accordingly, the stopper member (160) can prevent the OIS carrier (130) from being separated from the inside of the AF carrier (120).

[0110] In addition, the stopper member (160) may also serve to limit the upward movement of the AF carrier (120) and the OIS carrier (130) by having its upper surface come into contact with the inner surface of the cover member (117) when the OIS carrier (130) moves upward along the Z-axis direction together with the AF carrier (120).

[0111] Accordingly, as described above, when the AF carrier (120) moves along the Z-axis direction parallel to the optical axis, the OIS carrier (130) can move along the Z-axis direction together with the AF carrier (120).

[0112] In addition, the OIS carrier (130) can move along a direction perpendicular to the Z-axis direction with respect to the AF carrier (120), regardless of the movement of the AF carrier (120) along the Z-axis direction.

[0113] Accordingly, the lens module (10) can move along the Z-axis direction through movement of the AF carrier (120), and can move along a direction perpendicular to the optical axis through movement of the OIS carrier (130).

[0114] Through this, when the OIS carrier (130) moves along a direction perpendicular to the optical axis, the lens module (10) can be shake-compensated.

[0115] That is, the OIS carrier (130) can implement the shake correction function of the lens module (10) by moving in a direction perpendicular to the optical axis with respect to the AF carrier (120), which is a fixed body, while being accommodated in the internal space (111).

[0116] In other words, in the relative relationship between the OIS carrier (130) and the AF carrier (120), the AF carrier (120) may be a fixed body and the OIS carrier (130) may be a movable body.

[0117] Such an OIS carrier (130) can move in a direction perpendicular to the optical axis through electromagnetic force provided from the driving unit while the lens module (10) is mounted.

[0118] For example, the OIS carrier (130) can move along the X-axis direction, which is the second direction, through an electromagnetic force generated by the first magnet (145) and the first driving coil (142) corresponding to each other among the driving units, and the OIS carrier (130) can move along the Y-axis direction, which is the first direction, through an electromagnetic force generated by the second magnet (146) and the second driving coil (143) corresponding to each other among the driving units.

[0119] In this case, the first magnet (145) and the second magnet (146) can be mounted on one side of the OIS carrier (130), respectively, and the first driving coil (142) and the second driving coil (143) can be mounted on one side of the circuit board (141) arranged to surround the side wall (113) of the housing (110), respectively.

[0120] In addition, the first driving coil (142) may be positioned to correspond to the first magnet (145), and the second driving coil (143) may be positioned to correspond to the second magnet (146).

[0121] In addition, the OIS carrier (130) may include a mounting hole (133) formed with a predetermined area through the central portion of the carrier body (131) so that the lens module (10) can be mounted.

[0122] Accordingly, when the carrier body (131) is inserted into the internal space (111) in a state in which it is laminated on the base plate (121) of the AF carrier (120), the first drive coil (142) can be arranged to directly face the first magnet (145) mounted on the carrier body (131) through the first arrangement hole (115a), and the OIS carrier (130) can move along the X-axis direction through the electromagnetic force generated by the first drive coil (142) and the first magnet (145).

[0123] In addition, when the carrier body (131) is inserted into the internal space (111) in a state where it is laminated on the base plate (121) of the AF carrier (120), the second drive coil (143) can be arranged to directly face the second magnet (146) mounted on the carrier body (131) through the second arrangement hole (115b), and the OIS carrier (130) can move along the Y-axis direction through the electromagnetic force generated by the second drive coil (143) and the second magnet (146).

[0124] Here, the carrier body (131) may be provided in an approximately rectangular shape with four side surfaces (132), and the four side surfaces (132) may be a first side surface (132a), a second side surface (132b), a third side surface (132c), and a fourth side surface (132d) sequentially arranged along the circumferential direction of the carrier body (13) as shown in FIGS. 4 and 5.

[0125] In addition, each of the first side (132a), the second side (132b), the third side (132c), and the fourth side (132d) may be a surface parallel to the optical axis, and two adjacent sides may be arranged to form a 90 degree angle with each other.

[0126] In addition, the first side (132a) and the third side (132c) may be sides that form opposite sides and are perpendicular to the Y-axis, and the second side (132b) and the fourth side (132d) may be sides that form opposite sides and are perpendicular to the X-axis.

[0127] Accordingly, the second side (132b) may be a side that is parallel to the optical axis and perpendicular to the first side (132a), and the third side (132c) may be a side that is parallel to the optical axis and perpendicular to the second side (132b).

[0128] In this case, the first magnet (145) can be mounted on the carrier body (131) so as to be positioned on the second side (132b), the second magnet (146) can be mounted on the carrier body (131) so as to be positioned on the third side (132c), and the OIS carrier (130) can be stacked on the AF carrier (120) so that the first side (132a) faces the mounting plate (122) of the AF carrier (120).

[0129] At this time, when power is applied to the first drive coil (142) and / or the second drive coil (143) while the OIS carrier (130) is stacked on the AF carrier (120), the OIS carrier (130) can smoothly move along the Z-axis direction and the direction perpendicular to the AF carrier (120) through the plurality of second ball members (172).

[0130] Here, the plurality of second ball members (172) may be provided in a spherical shape so as to be capable of rolling motion. Such a plurality of second ball members (172) can smoothly move the OIS carrier (130) in a desired direction through rolling motion while reducing the frictional force between the OIS carrier (130) and the AF carrier (120).

[0131] To this end, the plurality of second ball members (172) may be positioned between one side of the OIS carrier (130) and one side of the AF carrier (120) facing each other.

[0132] For example, the plurality of second ball members (172) may be positioned between the lower surface of the carrier body (131) and the upper surface of the base plate (121) facing each other.

[0133] In this case, the OIS carrier (130) may include a third guide groove (134) that is formed inwardly along the Z-axis direction from the lower surface of the carrier body (131), and the base plate (121) may include a fourth guide groove (125) that is formed inwardly along the Z-axis direction from the upper surface facing the third guide groove (134).

[0134] Here, each of the third guide groove (134) and the fourth guide groove (125) may be formed to have a relatively larger diameter than the second ball member (172), and may be positioned to correspond to each other when the carrier body (131) is laminated on the upper portion of the base plate (121).

[0135] Accordingly, the plurality of second ball members (172) can be positioned between the corresponding third guide grooves (134) and the fourth guide grooves (125) and can be placed within a space formed by the third guide groove (134) and the fourth guide groove (125).

[0136] Through this, when an electromagnetic force is generated between the first drive coil (142) and the first magnet (145), the AF carrier (120) can smoothly move along the X-axis direction perpendicular to the optical axis with respect to the AF carrier (120) through the rolling motion of the plurality of second ball members (172).

[0137] In addition, when an electromagnetic force is generated between the second drive coil (143) and the second magnet (146), the AF carrier (120) can smoothly move along the Y-axis direction perpendicular to the optical axis with respect to the AF carrier (120) through the rolling motion of the plurality of second ball members (172).

[0138] In addition, when an electromagnetic force is generated between the first drive coil (142) and the first magnet (145) and between the second drive coil (143) and the second magnet (146), the AF carrier (120) can smoothly move along a direction that is perpendicular to the optical axis and includes both an X-axis component and a Y-axis component with respect to the AF carrier (120) through the rolling motion of the plurality of second ball members (172).

[0139] Due to this, the lens module (10) coupled to the OIS carrier (130) can also correct shaking by moving along at least one of the X-axis direction and the Y-axis direction.

[0140] As described above, the above driving unit can provide driving force to move the AF carrier (120) and / or OIS carrier (130) placed in the internal space (111) by generating an electromagnetic force between the corresponding magnets and the driving coil.

[0141] That is, the driving unit can move the AF carrier (120) along the Z-axis direction, which is the optical axis direction, or move the OIS carrier (130) in a direction perpendicular to the optical axis through electromagnetic force.

[0142] Here, the overall operation of the driving unit can be controlled through a control signal provided from the control unit (190), and the control unit can be a known controller such as an MCU or AP.

[0143] Through this, when the AF carrier (120) and the OIS carrier (130) are accommodated in the internal space (111), and the AF carrier (120) moves along the Z-axis direction, which is the optical axis direction, the focus of the lens module (10) can be adjusted, and when the OIS carrier (130) moves along a direction perpendicular to the optical axis direction, the shake of the lens module (10) can be corrected.

[0144] To this end, the driving unit may include a plurality of magnets (145, 146, 147) mounted on the AF carrier (120) and the OIS carrier (130), and a plurality of driving coils (142, 143, 144) arranged along the circumferential direction of the housing (110) so as to generate electromagnetic force in the magnets (145, 146, 147).

[0145] For example, the magnets (145, 146, 147) may include a first magnet (145), a second magnet (146), and a third magnet (147), and the drive coils (142, 143, 144) may include a first drive coil (142), a second drive coil (143), and a third drive coil (144) so ​​as to correspond to the first magnet (145), the second magnet (146), and the third magnet (147), respectively.

[0146] Here, each of the first drive coil (142), the second drive coil (143), and the third drive coil (144) may be mounted on one side of a circuit board (141) as shown in FIGS. 2 and 3, and the circuit board (141) may be arranged to surround the side of the housing (110) with the first drive coil (142), the second drive coil (143), and the third drive coil (144) mounted on one side facing the side of the housing (110).

[0147] In addition, the AF carrier (120) may include a third opening (126) and a fourth opening (127) formed on the side so that the side of the carrier body (131) can face the inner surface of the housing (110) when the OIS carrier (130) is stacked.

[0148] That is, each of the third opening (126) and the fourth opening (127) can be formed in the AF carrier (120) so as to be positioned between two restraining members (123) to which the stopper member (160) is fastened.

[0149] In addition, the first magnet (145) can be mounted on the carrier body (131) so as to be positioned on the second side (132b), the second magnet (146) can be mounted on the carrier body (131) so as to be positioned on the third side (132c), and the third magnet (147) can be mounted on the mounting plate (122) of the AF carrier (120) so as to be parallel to the first side (132a).

[0150] Accordingly, the second magnet (146) can be arranged to form a 90-degree angle with respect to the center point (O) of the first magnet (145) and the carrier body (131), and the third magnet (147) can be arranged to form a 90-degree angle with respect to the center point (O) of the first magnet (145) and the carrier body (131), and can be mounted on the mounting plate (122) to be located on the opposite side of the second magnet (146).

[0151] In other words, the first magnet (145) can be fixed to the carrier body (131) so as to be positioned on a second side (132b) of the side of the carrier body (131) that is parallel to the Z-axis and perpendicular to the X-axis, the second magnet (146) can be fixed to the carrier body (131) so as to be positioned on a third side (132c) of the side of the carrier body (131) that is parallel to the Z-axis and perpendicular to the Y-axis, and the third magnet (147) can be fixed to the mounting plate (122) of the AF carrier (120) that is parallel to the Z-axis and perpendicular to the Y-axis.

[0152] Accordingly, the first drive coil (142) can be arranged to face the first magnet (145) mounted on the OIS carrier (130) through the first placement hole (115a) and the third opening (126), the second drive coil (143) can be arranged to face the second magnet (146) mounted on the OIS carrier (130) through the second placement hole (115b) and the fourth opening (127), and the third drive coil (144) can be arranged to face the third magnet (147) mounted on the AF carrier (120) through the third placement hole (115c).

[0153] Through this, when power is applied to the first drive coil (142), the OIS carrier (130) can move along the second direction, the X-axis direction, by the electromagnetic force generated between the first drive coil (142) and the first magnet (145).

[0154] In addition, when power is applied to the second drive coil (143), the OIS carrier (130) can move along the Y-axis direction, which is the first direction, by the electromagnetic force generated between the second drive coil (143) and the second magnet (146).

[0155] In addition, when power is applied to the third drive coil (144), the AF carrier (120) can move along the Z-axis direction, which is the optical axis direction, by the electromagnetic force generated between the third drive coil (144) and the third magnet (147).

[0156] Through this, when the AF carrier (120) moves along the Z-axis direction, which is the optical axis direction, in the internal space (111), the focus of the lens module (10) can be adjusted, and when the OIS carrier (130) moves along at least one of the X-axis direction and the Y-axis direction, which are perpendicular to the optical axis direction, the shake of the lens module (10) can be corrected.

[0157] The above position detection sensor (150) can detect the position of at least one of the AF carrier (120) and OIS carrier (130) moving in the internal space (111).

[0158] That is, the position detection sensor (150) can detect the position of at least one of the AF carrier (120) and the OIS carrier (130) by detecting the movement of the magnet (145, 146, 147) moving together with the AF carrier (120) and / or the OIS carrier (130).

[0159] For example, the position detection sensor (150) can detect the position of the OIS carrier (130) on the XY plane defined by the X-axis and Y-axis, which are each perpendicular to the Z-axis, by detecting the movement of the first magnet (145) and the second magnet (146) mounted on the carrier body (131).

[0160] In other words, the position detection sensor (150) can obtain information on the X-axis coordinate component and the Y-axis coordinate component of the OIS carrier (130) on the XY plane perpendicular to the optical axis through the position movement of the first magnet (145) and the second magnet (146) that move together with the OIS carrier (130) when the OIS carrier (130) moves.

[0161] Similarly, the position detection sensor (150) can detect the position of the OIS carrier (130) and the AF carrier (120) with respect to the Z-axis coordinate component by detecting the movement of the third magnet (147) fixed to the mounting plate (122) of the AF carrier (120).

[0162] Through this, the actuator (100) for the camera module according to one embodiment of the present invention can automatically adjust the focus of the lens module (10) or correct the shaking of the lens module (10) based on information detected through the position detection sensor (150).

[0163] For example, the position detection sensor (150) may be a known Hall sensor for detecting changes in magnetic force that occur when the magnet (145, 146, 147) moves.

[0164] A position detection sensor (150) like this may be provided separately and mounted on one side of the circuit board (141), or may be formed integrally with a driving chip for controlling the driving coil (142, 143, 144).

[0165] However, the type of the position detection sensor (150) is not limited thereto, and any of various known sensors can be applied as long as they can detect the position of the AF carrier (120) and / or OIS carrier (130) moving through the driving force provided from the driving coil (142, 143, 144).

[0166] Hereinafter, for convenience of explanation, the position detection sensor (150) is separately provided and mounted on one side of the circuit board (141).

[0167] At this time, the position detection sensor (150) can be positioned so as to correspond to each of the driving coils (142, 143, 144).

[0168] For example, when the drive coils (142, 143, 144) include a first drive coil (142), a second drive coil (143), and a third drive coil (144) as described above, the position detection sensor (150) may include a first detection sensor (151) arranged at a position corresponding to the first drive coil (142), a second detection sensor (152) arranged at a position corresponding to the second drive coil (143), and a third detection sensor (153) arranged at a position corresponding to the third drive coil (144).

[0169] That is, the first detection sensor (151) can be mounted on the circuit board (141) so as to be positioned on the first drive coil (142) side, the second detection sensor (152) can be mounted on the circuit board (141) so as to be positioned on the second drive coil (143) side, and the third detection sensor (153) can be mounted on the circuit board (141) so as to be positioned on the third drive coil (144) side.

[0170] Accordingly, the first detection sensor (151) may be positioned at a position facing the first magnet (145) mounted on the carrier body (131) of the OIS carrier (130), the second detection sensor (152) may be positioned at a position facing the second magnet (146) mounted on the carrier body (131) of the OIS carrier (130), and the third detection sensor (153) may be positioned at a position facing the third magnet (147) mounted on the mounting plate (122) of the AF carrier (120).

[0171] Through this, the first detection sensor (151) can detect the X-axis coordinate component of the OIS carrier (130) through the movement of the first magnet (145) moving along the X-axis direction together with the carrier body (131), the second detection sensor (152) can detect the Y-axis coordinate component of the OIS carrier (130) through the movement of the second magnet (146) moving along the Y-axis direction together with the carrier body (131), and the third detection sensor (153) can detect the Z-axis coordinate component of the AF carrier (120) and the OIS carrier (130) through the movement of the third magnet (147) moving along the Z-axis direction together with the AF carrier (120).

[0172] Accordingly, the actuator (100) for a camera module according to one embodiment of the present invention can determine the current positions of the AF carrier (120) and the OIS carrier (130) based on information obtained through the position detection sensor (150), thereby determining the current position of the lens module (10) mounted on the OIS carrier (130).

[0173] Through this, the actuator (100) for the camera module according to one embodiment of the present invention can adjust the focus or compensate for shaking of the lens module (10) by adjusting the position of the lens module (10) based on information obtained through the position detection sensor (150).

[0174] At this time, the actuator (100) for the camera module according to one embodiment of the present invention can accurately perform the initial setting of the camera module to correct the shaking of the lens module (10) even if the OIS carrier (130) stacked on the AF carrier (120) moves without direction restriction on the XY plane perpendicular to the Z-axis, which is the optical axis, through the rolling movement of the second ball member (172).

[0175] That is, the actuator (100) for a camera module according to one embodiment of the present invention can accurately perform the initial setting of the camera module for compensating for the shake of the lens module (10) by allowing the position detection sensor (150) to obtain linear position information with the rotational component excluded during the initial setting of the camera module for compensating for the shake of the lens module (10).

[0176] Here, the actuator (100) for a camera module according to one embodiment of the present invention may further include a memory unit (180) for storing linear position information of the OIS carrier (130), and the linear position information of the OIS carrier (130) detected through the position detection sensor (150) may be stored in the memory unit (180).

[0177] For example, the memory unit (180) may store first position information of the OIS carrier (130) in a second direction generated by moving the OIS carrier along a second direction that is perpendicular to both the optical axis direction and the first direction, second position information of the OIS carrier (130) in the first direction generated by moving the OIS carrier (130) along the first direction based on the first position information, and third position information of the OIS carrier (130) in which the center (O) of the OIS carrier (130) coincides with the optical axis based on the first position information and the second position information.

[0178] In this case, the first position information may be information generated when the guide surface (135) described later is in close contact with the housing (110) or the AF carrier (120), and the control unit (190) may perform the initial settings of the camera module and the focus adjustment function and shake correction function of the lens module (10) in real time during actual operation based on the linear position information of the OIS carrier (130) stored in the memory unit (180).

[0179] That is, the control unit (190) can perform initial settings of the camera module using the linear position information of the OIS carrier stored in the memory unit (180).

[0180] In addition, the control unit (190) can compare the linear position information of the OIS carrier stored in the memory unit (180) during the initial setup of the camera module with the real-time position information of the OIS carrier (130) detected through the position detection sensor (150) to control the position of the OIS carrier (130) during actual operation.

[0181] To this end, the actuator (100) for a camera module according to one embodiment of the present invention may include a guide surface (135) for initial setting of the camera module, and the position detection sensor (150) may be provided in a plurality of three or more so as to obtain information for suppressing rotation of the OIS carrier (130) moving in a direction perpendicular to the optical axis.

[0182] In this case, the guide surface (135) may be formed as a horizontal surface having a predetermined area on a side parallel to the optical axis, and the guide surface (135) may be formed as a protruding surface that protrudes in a first direction perpendicular to the optical axis from the side parallel to the optical axis.

[0183] In addition, the guide surface (135) may be formed as a horizontal surface whose length formed in a direction parallel to the optical axis direction is shorter than the length formed in a direction perpendicular to the optical axis direction.

[0184] In addition, at least two position detection sensors (for example, 151) among the plurality of position detection sensors (150) may be arranged to face a side that is parallel to the optical axis and perpendicular to the guide surface (135).

[0185] That is, the at least two position detection sensors (for example, 151) may be arranged to face a surface that forms a 90-degree angle with the guide surface (135) based on the center point (O) of the OIS carrier (130).

[0186] As a specific example, as shown in FIGS. 6 to 8, the guide surface (135) may be formed as a horizontal surface having a predetermined area on the first side surface (132a) of the carrier body (131) that is parallel to the optical axis, and the guide surface (135) may be formed as a protruding surface that protrudes in a first direction perpendicular to the optical axis from the first side surface (132a).

[0187] In addition, the guide surface (135) may be formed as a horizontal plane in which a length formed in a direction parallel to the optical axis direction is shorter than a length formed in a direction perpendicular to the optical axis direction. That is, the guide surface (135) may be formed as a horizontal plane in which a length in a direction parallel to the Z axis is shorter than a length in a direction parallel to the X axis.

[0188] At this time, when initially setting the camera module to compensate for the shaking of the lens module (10), the guide surface (135) can move along a direction perpendicular to the optical axis while maintaining a state of being in close contact with one side of the AF carrier (120) or one side of the housing (110) that face each other.

[0189] That is, the OIS carrier (130) can move along the X-axis direction while maintaining the guide surface (135) in close contact with one surface of the AF carrier (120) or one surface of the housing (110) at a predetermined area during the initial setup of the camera module to correct the shaking of the lens module (10).

[0190] For example, the OIS carrier (130) can move along the X-axis direction while maintaining the guide surface (135) in contact with one surface of the mounting plate (122) of the AF carrier (120) at a predetermined area during the initial setting to correct the shaking of the lens module (10).

[0191] Accordingly, the guide surface (135) can serve as a path that physically guides the linear movement of the OIS carrier (130) along the X-axis direction during the initial setting of the OIS carrier (130) to correct the shaking of the lens module (10).

[0192] That is, the guide surface (135) can serve as a reference surface that physically guides the direction of movement of the OIS carrier (130) so that the OIS carrier (130) can move in a straight line while maintaining parallel to the X-axis along the second direction during the initial setup of the camera module to correct the shaking of the lens module (10).

[0193] In the present invention, the state in which the guide surface (135) is in close contact with one side of the AF carrier (120) or one side of the housing (110) may have some processing errors, but at least half or more of the area may be in contact with the facing one side of the AF carrier (120) or one side of the housing (110). For example, when the guide surface (135) is in close contact with one side of the AF carrier (120) or one side of the housing (110), an area of ​​80% or more of the total area of ​​the guide surface (135) may be in contact with the facing one side of the AF carrier (120) or one side of the housing (110).

[0194] Meanwhile, the plurality of position detection sensors (150) may include two first detection sensors (151), and the two first detection sensors (151) may be mounted on one surface of a circuit board (141) that is arranged to face a second side (132b) that is perpendicular to the first side (132a) on which the guide surface (135) is formed.

[0195] Accordingly, the two first detection sensors (151) can be arranged to face the second side (132b) that is parallel to the optical axis and perpendicular to the guide surface (135).

[0196] That is, the two first detection sensors (151) can be arranged to face the surface forming a 90-degree angle with respect to the center point (O) of the OIS carrier (130) and the guide surface (135).

[0197] In this case, each of the first drive coil (142) and the first magnet (145) may be provided in two pieces so as to correspond to the two first detection sensors (151), and the two first magnets (145) may be mounted on the second side (132b) so as to face the two first detection sensors (151).

[0198] In addition, the two first drive coils (142) can be mounted on one side of a circuit board (141) that is arranged to face the second side (132b) perpendicular to the first side (132a) on which the guide surface (135) is formed, similar to the two first detection sensors (151).

[0199] That is, one side of the circuit board (141) on which the two first detection sensors (151) and the two first driving coils (142) are all mounted can be arranged to face the second side (132b) that is parallel to the optical axis and perpendicular to the first side (132a).

[0200] In other words, one side of the circuit board (141) on which the two first detection sensors (151) and the two first driving coils (142) are all mounted can form a surface that forms a 90-degree angle with the first side surface (132a) on which the guide surface (135) is formed based on the center point (O) of the OIS carrier (130).

[0201] Accordingly, the two first detection sensors (151) can be mounted on one surface of the circuit board (141) so as to be matched one-to-one with the two first driving coils (142) and the two first magnets (145), and the two first detection sensors (151) and the two first driving coils (142) can be arranged to face the second side (132b) that is parallel to the optical axis and perpendicular to the first side (132a).

[0202] In this case, each of the two first detection sensors (151) can detect the Hall value by the two first magnets (145) that are matched one-to-one with each other in the OIS carrier (130) moving in a straight line along the X-axis direction.

[0203] Through this, the actuator (100) for the camera module according to one embodiment of the present invention can generate position information of the OIS carrier (130) in the X-axis direction based on the Hall value measured through the two first detection sensors (151), and the position information of the OIS carrier (130) in the X-axis direction obtained through the two first detection sensors (151) can be stored in the memory unit (190).

[0204] For example, when the OIS carrier (130) is moved along the X-axis direction while maintaining a state of being in close contact with one surface of the mounting plate (122) of the AF carrier (120) by a predetermined area through the guide surface (135) during the initial setting for compensating for the shaking of the lens module (10) as described above, the two first detection sensors (151) can generate first position information of the OIS carrier (130) with respect to the X-axis direction.

[0205] Accordingly, the two first detection sensors (151) can generate first position information of the OIS carrier (130) that moves in a straight line along the X-axis direction while maintaining the X-axis perpendicular to the optical axis without rotation through the guide surface (135).

[0206] Through this, the actuator (100) for the camera module according to one embodiment of the present invention can obtain first position information of the OIS carrier (130) to suppress rotation of the OIS carrier (130) so that the OIS carrier (130) can move in a straight line along the X-axis direction while maintaining parallel to the X-axis without rotation based on information detected through the two first detection sensors (151), and the first position information can be stored in the memory unit (180) as described above.

[0207] Accordingly, the two first detection sensors (151) can perform a role of obtaining coordinate components for the X-axis direction of the OIS carrier (130) and information for suppressing rotation of the OIS carrier (130) so that the OIS carrier (130) can move in a straight line in a direction parallel to the X-axis direction, which is the second direction.

[0208] Through this, the control unit (190) can control the initial settings of the camera module as well as the position of the OIS carrier (130) during actual operation using the first location information stored in the memory unit (180).

[0209] For example, in an actuator (100) for a camera module according to one embodiment of the present invention, the control unit (190) can drive the two first drive coils (142) so that the difference in Hall values ​​measured by the two first detection sensors (151) is maintained based on the first position information.

[0210] Through this, the control unit (190) can move the OIS carrier (130) in a straight line along the X-axis direction while maintaining a state parallel to the X-axis.

[0211] In this way, the actuator (100) for a camera module according to one embodiment of the present invention can accurately obtain position information with the rotational component excluded by moving in a straight line in a direction parallel to the X-axis direction by electromagnetic control through the two first detection sensors (151) while the OIS carrier (130) moves in a straight line so as to maintain the straight line parallel to the X-axis by physical contact through the guide surface (135) during the initial setting for compensating for the shaking of the lens module (10).

[0212] That is, the actuator (100) for a camera module according to one embodiment of the present invention has the guide surface (135) and two first detection sensors (151) arranged at positions forming a 90-degree angle with respect to the center point (O) of the OIS carrier (130) to guide the linear movement of the OIS carrier (130) along the X-axis direction, thereby enabling the linear movement of the OIS carrier (130) to be guided through physical contact and electromagnetic control.

[0213] Accordingly, the actuator (100) for a camera module according to one embodiment of the present invention can accurately perform initial settings for correcting the shaking of the lens module (10) even if the OIS carrier (130) stacked on the AF carrier (120) moves without direction restriction on the XY plane perpendicular to the Z-axis, which is the optical axis, through the rolling motion of the second ball member (172).

[0214] Although the drawing and description illustrate and describe that the guide surface (135) is formed on the first side (132a), the present invention is not limited thereto, and the guide surface (135) may be formed to be positioned on the fourth side (132d) of the carrier body (131). That is, the guide surface (135) may be formed to be positioned on a side of the carrier body (131) on which the first magnet (145) and the second magnet (146) are not mounted.

[0215] In this case, the two first detection sensors (151) may be mounted on one side of the circuit board (141) that is positioned facing the first side (132a) or the third side (132c) of the carrier body (131) so that the two first detection sensors (151) may be positioned parallel to the optical axis and opposite the side perpendicular to the fourth side (132d), and the arrangement positions of the second detection sensor (152) and the third detection sensor (153) may be appropriately changed depending on the positions of the two first detection sensors (151).

[0216] In addition, the second magnets (146) and the second driving coils (143) positioned at corresponding positions so as to move the OIS carrier (130) among the driving units along the Y-axis may be provided with two second magnets (146) and two second driving coils (143) positioned at corresponding positions as shown in FIGS. 6 and 8, but each of the second magnets (146) and the second driving coils (143) may be provided with one second magnet (146) and one second driving coil (143) positioned at corresponding positions as shown in FIG. 9.

[0217] In this case, the second detection sensor (152) may be provided as one regardless of the number of the second magnets (146) and the second driving coils (143), and when two second magnets (146) and two second driving coils (143) are arranged at positions corresponding to each other, the second detection sensor (152) may be arranged to be located on the inside of one of the two second driving coils (143).

[0218] Meanwhile, the guide surface (135) may be formed as a horizontal surface having a predetermined area as described above, and may be formed as a protruding surface that protrudes in a direction perpendicular to the optical axis from the side of the carrier body (131).

[0219] That is, the guide surface (135) may be formed as a horizontal plane parallel to the Z-axis, which is the optical axis, while facing and being in close contact with one side of the housing (110) or one side of the AF carrier (120), and may be formed to protrude from the side of the carrier body (131) to one side of the housing (110) or one side of the AF carrier (120).

[0220] At this time, the guide surface (135) may be formed as a horizontal surface that extends integrally along a direction perpendicular to both the optical axis direction and the protrusion direction while being located at the center of the side of the carrier body (131) where the guide surface (135) is formed.

[0221] In other words, the guide surface (135) may be formed as a single horizontal plane that is not interrupted along the direction of movement of the OIS carrier (130) that moves in a straight line so that the guide surface (135) is maintained in close contact with the housing (110) or the AF carrier (120) while having an area that includes the central portion of the side where the guide surface (135) is formed among the carrier body (131).

[0222] In addition, the guide surface (135) can be formed to have a shape that is symmetrical left and right based on an imaginary center line parallel to the Z axis on the side of the carrier body (131) where the guide surface (135) is formed.

[0223] For example, the guide surface (135) may be formed as a horizontal surface that extends integrally along a second direction that is perpendicular to both the optical axis direction and the first direction while being located at the center of the first side surface (132a).

[0224] In addition, the guide surface (135) may be formed as a horizontal plane having a symmetrical shape along the X-axis direction, which is the second direction, based on the central portion of the first side surface (132a) on the first side surface (132a).

[0225] In addition, the guide surface (135) may be formed as a horizontal surface having a length in the direction parallel to the Z axis that is shorter than the length in the direction parallel to the X axis, as described above.

[0226] Accordingly, when the OIS carrier (130) is initially set to compensate for the shaking of the lens module (10), when the guide surface (135) is moved toward the AF carrier or the housing (110) so that it comes close to one side of the AF carrier (120) or one side of the housing (110), the guide surface (135) can come into surface contact with one side of the AF carrier (120) or one side of the housing (110).

[0227] In addition, when the guide surface (135) is in close contact with one side of the AF carrier (120) or one side of the housing (110) that is facing the guide surface (135), the guide surface (135) can be in close contact with one side of the AF carrier (120) or one side of the housing (110) over a wider area.

[0228] In addition, since the guide surface (135) is formed as a single horizontal plane that extends integrally without being interrupted along the second direction that is perpendicular to both the optical axis direction and the first direction while being positioned at the center of the first side surface (132a), when the guide surface (135) is in close contact with one side of the AF carrier (120) or one side of the housing (110) that it faces, the guide surface (135) can always maintain a state in which it is in close contact with one side of the AF carrier (120) or one side of the housing (110) over a predetermined area.

[0229] Through this, when the camera module is initially set up to compensate for the shaking of the lens module (10), the OIS carrier (130) can move along the X-axis direction while always maintaining a state of physical contact with one side of the AF carrier (120) or one side of the housing (110) through the guide surface (135), so that the guide surface (135) can smoothly perform the role of a reference surface that physically guides the movement direction of the OIS carrier (130) so that the OIS carrier (130) can move in a straight line while maintaining parallel to the X-axis along the second direction.

[0230] Due to this, the actuator (100) for the camera module according to one embodiment of the present invention can accurately perform initial settings for correcting the shaking of the lens module (10) using the guide surface (135).

[0231] For example, when the OIS carrier (130) moves in the first direction so that the guide surface (135) is in close contact with the inner surface of the mounting plate (122) of the AF carrier (120) during the initial setup of the camera module to compensate for the shaking of the lens module (10), the guide surface (135) can be in close contact with the inner surface of the mounting plate (122) over a wider area, and the guide surface (135) can always maintain a state in which it is in close contact with the inner surface of the mounting plate of the AF carrier (120) over a predetermined area.

[0232] Through this, when the camera module is initially set up to compensate for the shaking of the lens module (10), the OIS carrier (130) can always be physically kept in close contact with the inner surface of the mounting plate (122) of the AF carrier (120) through the guide surface (135) and can move along the X-axis direction, so the OIS carrier (130) can move in a straight line along the X-axis direction while maintaining parallel to the X-axis.

[0233] Accordingly, the actuator (100) for the camera module according to one embodiment of the present invention can accurately generate position information for the X-axis direction of the OIS carrier (130) using the guide surface (135), thereby enabling the initial setting for correcting the shaking of the lens module (10) to be accurately performed.

[0234] At this time, the guide surface (135) may be provided to protrude further outward than other parts on the side of the carrier body (131).

[0235] For example, when the guide surface (135) is formed on the first side (132a) of the carrier body (131), the first side (132a) may include a first portion (132a-1) and a second portion (132a-2) that protrudes further outward along the Y-axis direction than the first portion (132a-1), as shown in FIGS. 6 and 7.

[0236] In this case, the second portion (132a-2) may have an area including the central portion of the first side (132a), and the guide surface (135) may be formed to be positioned in the second portion (132a-2).

[0237] Accordingly, when the guide surface (135) is brought into close contact with one side of the AF carrier (120) or one side of the housing (110) facing the guide surface (135) during the initial setup of the camera module to compensate for the shaking of the lens module (10), the first side (132a) may not come into contact with one side of the AF carrier (120) or one side of the housing (110) except for the guide surface (135) while the guide surface (135) comes into close contact with one side of the AF carrier (120) or one side of the housing (110).

[0238] Through this, when the camera module is initially set up to compensate for the shaking of the lens module (10), the OIS carrier (130) can move in a straight line in a direction perpendicular to the optical axis while maintaining a state of being in close contact with one surface of the AF carrier (120) or one surface of the housing (110) that only the guide surface (135) faces, so that the OIS carrier (130) can be guided to move in a straight line only through the guide surface (135).

[0239] Due to this, the actuator (100) for the camera module according to one embodiment of the present invention can accurately perform the initial setting for correcting the shaking of the lens module (10) using the guide surface (135).

[0240]

[0241] Meanwhile, as described above, when the actuator (100) for a camera module according to one embodiment of the present invention includes a guide surface (135), the initial setting of the camera module for correcting the shaking of the lens module (10) can be performed using the guide surface (135).

[0242] That is, the initial setting method of a camera module using an actuator (100) for a camera module according to one embodiment of the present invention may include a first step (S1), a second step (S2), and a third step (S3) as illustrated in FIG. 11.

[0243] The above first step (S1) may be a step of moving the OIS carrier (130) in a first direction perpendicular to the optical axis, and while the OIS carrier (130) is in close contact with the AF carrier (120) or the housing (110), moving the OIS carrier (130) in a straight line along a first direction perpendicular to both the optical axis and the first direction, and generating first position information of the OIS carrier (130) with respect to the second direction.

[0244] In this case, the guide surface (135) may be formed as a horizontal surface having a predetermined area on the first side (132a) of the carrier body (131) of the OIS carrier (130) as described above.

[0245] Here, in the first step (S1), the first location information of the OIS carrier (130) in the second direction can be generated through the two first detection sensors (151), and the two first detection sensors (151) can be arranged to be perpendicular to the first side (132a) of the carrier body (131) as described above and to face the second side (132b) on which the two first magnets (145) are mounted.

[0246] Accordingly, the two first detection sensors (151) can detect the X-axis coordinate component of the OIS carrier (130) through the movement of the two first magnets (145) moving along the X-axis direction, which is the second direction, together with the carrier body (131).

[0247] Here, the first location information obtained through the two first detection sensors (151) can be stored in the memory unit (180) as described above.

[0248] In addition, the control unit (190) can control the initial settings of the camera module as well as the position of the OIS carrier (130) during actual operation using the first location information stored in the memory unit (180).

[0249] For example, the control unit (190) can drive the two first drive coils (142) so that the difference in Hall values ​​measured by the two first detection sensors (151) is maintained based on the first location information.

[0250] Through this, the control unit (190) can move the OIS carrier (130) in a straight line along the X-axis direction while maintaining a state parallel to the X-axis.

[0251] At this time, the first step (S1) can be performed in a state where the guide surface (135) is in close contact with one surface of the AF carrier (120) or one surface of the housing (110) facing it, as illustrated in FIG. 12.

[0252] In addition, the first step (S1) can be performed in a state where the rotation of the OIS carrier (130) moving in a straight line in a direction parallel to the second direction, the X-axis direction, is suppressed.

[0253] In this case, the OIS carrier (130) moving along the X-axis direction in the first step (S1) can be suppressed from rotating based on information obtained through the two first detection sensors (151).

[0254] That is, the two first detection sensors (151) can be arranged so as to be perpendicular to the guide surface (135) as described above and to face the second side (132b) on which the two first magnets (145) are mounted.

[0255] Accordingly, in the first step (S1), the two first detection sensors (151) can detect the position of the OIS carrier (130) moving along the X-axis direction and obtain information for suppressing the rotation of the OIS carrier (130) moving in a straight line parallel to the X-axis.

[0256] For example, in the first step (S1), the OIS carrier (130) can move in a straight line along the X-axis direction while the guide surface (135) is in close contact with the inner surface of the mounting plate (122) of the AF carrier (120) by moving the OIS carrier (130) in a first direction perpendicular to the optical axis, and the guide surface (135) and the inner surface of the mounting plate (122) can maintain a close contact with each other during the process in which the OIS carrier (130) moves along the X-axis direction.

[0257] Additionally, in the first step (S1), the OIS carrier (130) can move in a straight line along the X-axis direction while rotation is suppressed based on information obtained through the two first detection sensors (151).

[0258] Here, each of the two first detection sensors (151) can detect the position of the OIS carrier (130) with respect to the X-axis by detecting the Hall value by the two first magnets (145) that are matched one-to-one with each other in the OIS carrier (130) moving in a straight line along the X-axis direction through the guide surface (135).

[0259] In addition, the control unit (190) can drive the two first drive coils (142) to maintain the difference between the Hall values ​​measured by each of the two first detection sensors (151) based on the Hall values ​​measured by the two first detection sensors (151).

[0260] Through this, in the first step (S1), the OIS carrier (130) can be moved in a straight line in a direction parallel to the X-axis direction while the guide surface (135) and the mounting plate (122) are kept in physical contact with each other in a state where rotation is suppressed by electromagnetic control through the two first detection sensors (151).

[0261] Due to this, in the first step (S1), the two first detection sensors (151) can detect the exact position of the OIS carrier (130) moving along a direction parallel to the X-axis with the rotational component of the OIS carrier (130) excluded.

[0262] Accordingly, even if the OIS carrier (130) stacked on the AF carrier (120) moves without direction limitation on the XY plane perpendicular to the Z-axis, which is the optical axis, through the rolling motion of the second ball member (172), the two first detection sensors (151) can generate accurate first position information of the OIS carrier (130) moving in a direction parallel to the X-axis with the rotational component of the OIS carrier (130) excluded.

[0263] In the drawings and description, it is illustrated and described that the OIS carrier (130) moves along the X-axis direction while the guide surface (135) is in close contact with the inner surface of the mounting plate (122) of the AF carrier (120) in the first step (S1), but the present invention is not limited thereto.

[0264] That is, when the guide surface (135) is formed on the fourth side surface (132d) of the carrier body (131), in the first step (S1), the OIS carrier (130) can move in a straight line along the Y-axis direction while the guide surface (135) is in close contact with one surface of the AF carrier (120).

[0265] In this case, the two first detection sensors (151) can be arranged to face the first side (132a) or the third side (132c) which is perpendicular to the fourth side (132d) on which the guide surface (135) is formed, and the OIS carrier (130) can move in a straight line along the Y-axis direction while rotation is suppressed based on the information obtained through the two first detection sensors (151).

[0266] The second step (S2) may be a step of moving the OIS carrier (130) in a straight line along the first direction based on the first location information obtained in the first step (S1) and generating second location information of the OIS carrier (130) for the first direction.

[0267] That is, the second step (S2) can be performed by moving the OIS carrier (130) in a straight line along the first direction while the center of the OIS carrier (130) is located at the center of the entire operating range of the OIS carrier (130) in the second direction based on the first location information obtained through the first step (S1), as illustrated in FIG. 13.

[0268] Through this, the second step (S2) can generate second location information of the OIS carrier (130) in the first direction.

[0269] Here, in the second step (S2), the second location information of the OIS carrier (130) in the first direction can be generated through the second detection sensor (152), and the second detection sensor (152) can be arranged to be perpendicular to the second side (132b) of the carrier body (131) as described above and to face the third side (132c) on which the second magnet (146) is mounted.

[0270] Through this, the second detection sensor (152) can detect the Y-axis coordinate component of the OIS carrier (130) through the movement of the second magnet (146) moving along the Y-axis direction, which is the first direction, together with the carrier body (131).

[0271] Additionally, the second location information obtained through the second detection sensor (152) can be stored in the memory unit (180) in the same manner as the first location information described above.

[0272] Accordingly, the control unit (190) can control the initial settings of the camera module as well as the position of the OIS carrier (130) during actual operation using the second location information stored in the memory unit (180).

[0273] At this time, the second step (S2) can be performed in a state where the rotation of the OIS carrier (130) moving in a straight line along the first direction is suppressed, similar to the first step (S1).

[0274] That is, in the second step (S2), the OIS carrier (130) moving along the Y-axis direction, which is the first direction, can be suppressed from rotating based on the first position information acquired through the two first detection sensors (151).

[0275] Specifically, when the OIS carrier (130) moves in a straight line along the Y-axis direction, which is the first direction, while the center of the OIS carrier (130) is located at the center position of the entire movable range of the OIS carrier (130) in the second direction, each of the two first detection sensors (151) can detect the position of the OIS carrier (130) with respect to the X-axis by detecting the Hall value by the two first magnets (145) that are matched one-to-one with each other.

[0276] In this case, the control unit (190) can drive the two first drive coils (142) so that the difference between the Hall values ​​measured by the two first detection sensors (151) is maintained based on the Hall values ​​measured by the two first detection sensors (151).

[0277] Through this, in the second step (S2), the OIS carrier (130) can be moved in a straight line along the Y-axis direction, which is the first direction, while rotation is suppressed by electromagnetic control through the two first detection sensors (151).

[0278] Due to this, in the second step (S2), the second detection sensor (152) can detect the exact position of the OIS carrier (130) moving along the Y-axis direction with the rotational component of the OIS carrier (130) excluded.

[0279] Accordingly, even if the OIS carrier (130) stacked on the AF carrier (120) moves without direction limitation on the XY plane perpendicular to the Z-axis, which is the optical axis, through the rolling motion of the second ball member (172), the two first detection sensors (151) can generate accurate first position information of the OIS carrier (130) moving in a direction parallel to the X-axis with the rotational component of the OIS carrier (130) excluded.

[0280] Accordingly, even if the OIS carrier (130) stacked on the AF carrier (120) moves without direction limitation on the XY plane perpendicular to the Z-axis, which is the optical axis, through the rolling motion of the second ball member (172), the second detection sensor (152) can generate accurate second position information of the OIS carrier (130) moving in a direction parallel to the Y-axis with the rotational component of the OIS carrier (130) excluded.

[0281] In the drawings and description, the second step (S2) is illustrated and described as being performed through a process in which the OIS carrier (130) moves in a straight line along the Y-axis direction, which is the first direction, while the center of the OIS carrier (130) is located at the center of the entire movable range of the OIS carrier (130) in the second direction based on the primary position information acquired through the first step (S1). However, the present invention is not limited thereto.

[0282] That is, the second step (S2) may be performed similarly to the first step (S1) by moving the OIS carrier (130) in a straight line along the Y-axis direction while maintaining one side of the OIS carrier (130) in close contact with one side of the AF carrier (120) or one side of the housing (110).

[0283] In this case, the OIS carrier (130) may further include a separate guide surface (not shown) formed on one side of the AF carrier (120) or one side that is in close contact with one side of the housing (110) so as to perform the same function as the guide surface (135) described above.

[0284] In addition, the second detection sensor (152) may be provided with two detection sensors arranged to face each other on a side perpendicular to the separate guide surface, and the two second detection sensors may obtain information for suppressing rotation of the OIS carrier (130) moving along the Y-axis direction similarly to the two first detection sensors (151) described above.

[0285] Through this, the second step (S2) can generate the second position information of the OIS carrier (130) in the Y-axis direction in the same manner as the first step (S1) described above.

[0286] The above third step (S3) may be a step of generating third location information in which the center of the OIS carrier (130) matches the optical axis based on the first location information and the second location information.

[0287] That is, the third step (S3) may be a step of moving the OIS carrier (130) in a straight line along the X-axis direction, which is the second direction, and regenerating the position information of the OIS carrier (130) with respect to the X-axis direction.

[0288] For example, the third step (S3) can move the OIS carrier (130) in a straight line along the X-axis direction, similar to the first step (S1), while the center of the OIS carrier (130) is located at the center of the entire movable range of the OIS carrier (130) in the Y-axis direction based on the information obtained through the first step (S1) and the second step (S2), as illustrated in FIG. 14.

[0289] Accordingly, the third step (S3) can be performed in a state in which, unlike the first step (S1), the guide surface (135) of the OIS carrier (130) is not in close contact with one side of the AF carrier (120) or one side of the housing (110), and the OIS carrier (130) moves in a straight line along the X-axis direction perpendicular to the Y-axis direction while passing the center position of the entire range of motion of the OIS carrier (130) in the Y-axis direction.

[0290] In this case, the OIS carrier (130) moving in a straight line along the X-axis direction in the third step (S3) can be suppressed from rotating based on information obtained through the two first detection sensors (151) as in the first step (S1).

[0291] Accordingly, the position information of the OIS carrier (130) obtained through the two first detection sensors (151) in the third step (S3) is information obtained in the process of the OIS carrier (130) moving along the X-axis direction perpendicular to the Y-axis direction while passing the center position of the entire movable range of the OIS carrier (130) in the Y-axis direction, so that the position information of the OIS carrier (130) in the X-axis direction for correcting the shaking of the lens module (10) can be obtained more accurately.

[0292] In other words, the position information of the OIS carrier (130) acquired through the two first detection sensors (151) in the first step (S1) is information acquired while the OIS carrier (130) is in close contact with one side of the AF carrier (120) or one side of the housing (110), so there may be a deviation from the position information acquired in the process of the OIS carrier (130) moving along the X-axis direction, which is perpendicular to the Y-axis direction, while passing the center position of the entire movable range of the OIS carrier (130) in the Y-axis direction.

[0293] However, in the present invention, the position information of the OIS carrier (130) in the X-axis direction is re-corrected based on information obtained in the process of the OIS carrier (130) moving along the X-axis direction perpendicular to the Y-axis direction while passing the center position of the entire operating range of the OIS carrier (130) in the Y-axis direction through the third step (S3), thereby allowing the position information of the OIS carrier (130) to be more accurately obtained.

[0294] That is, in the present invention, the third position information in which the center of the OIS carrier (130) coincides with the optical axis can be accurately set through the third step (S3).

[0295] Through this, the initial setting method of the camera module according to one embodiment of the present invention can accurately obtain the position information of the OIS carrier (130) for correcting the shaking of the lens module (10) even if the OIS carrier (130) stacked on the AF carrier (120) moves without direction restriction on the XY plane perpendicular to the Z-axis, which is the optical axis, through the rolling movement of the second ball member (172).

[0296] Meanwhile, the initial setting method of the camera module according to one embodiment of the present invention may further include a focus correction step of generating position information of the OIS carrier (130) in the Z-axis direction by linearly moving the OIS carrier (130) together with the AF carrier (120) along the Z-axis direction.

[0297] This focus correction step may be a step for automatically adjusting the focus through movement of the AF carrier (120) during initial setup.

[0298] That is, the focus correction step can generate position information of the OIS carrier (130) in the Z-axis direction based on the position information of the AF carrier (120) and the OIS carrier (130).

[0299] Here, in the focus correction step, the position information of the OIS carrier (130) in the Z-axis direction can be obtained through the third detection sensor (153), and the third detection sensor (153) can be placed at a position facing the third magnet (147) mounted on the mounting plate (122) of the AF carrier (120) as described above.

[0300] Through this, the third detection sensor (153) can detect the Z-axis coordinate component of the OIS carrier (130) through the movement of the third magnet (147) moving along the Z-axis direction together with the AF carrier (120).

[0301] Accordingly, the focus correction step can generate position information of the OIS carrier (130) for the autofocus function by detecting the Z-axis coordinate component of the OIS carrier (130) by moving along the Z-axis direction, which is the optical axis, through the cloud movement of the first ball member (171) of the OIS carrier (130) stacked on the AF carrier (120).

[0302] This focus correction step may be performed after the third step (S3) is completed, or may be performed before the first step (S1).

[0303] Although the embodiments of the present invention have been described, the spirit of the present invention is not limited to the embodiments presented in this specification, and those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same spirit, but this will also be considered to fall within the spirit of the present invention.

Claims

1. Housing; An AF carrier accommodated within the housing so as to be movable along the optical axis; An OIS carrier arranged on the AF carrier so as to be movable in a direction perpendicular to the optical axis, and including a guide surface protruding in a first direction perpendicular to the optical axis from a first side parallel to the optical axis; A driving unit including a magnet and a driving coil that are arranged between the OIS carrier and the housing and correspond to each other so as to provide a driving force for moving the OIS carrier; and It includes a position detection sensor, which is provided in number of three or more and is arranged on the driving coil side so as to detect the movement of the magnet; The above position detection sensor includes two first detection sensors arranged to face the second side that is perpendicular to the first side and parallel to the optical axis, An actuator for a camera module in which the above guide surface is formed as a horizontal plane whose length formed in a direction parallel to the optical axis direction is shorter than the length formed in a direction perpendicular to the optical axis direction.

2. In paragraph 1, An actuator for a camera module, wherein the guide surface is formed as a horizontal plane extending integrally along a second direction that is perpendicular to both the optical axis direction and the first direction while being located at the center of the first side.

3. In paragraph 1, The actuator for the above camera module further includes a memory unit that stores linear position information of the OIS carrier, The above memory section, First position information of the OIS carrier for the second direction generated by moving the OIS carrier along the second direction perpendicular to both the optical axis direction and the first direction while the guide surface is in close contact with the housing or the AF carrier, Second location information of the OIS carrier for the first direction generated by moving the OIS carrier along the first direction based on the first location information, An actuator for a camera module that stores third location information of the OIS carrier, the center of which coincides with the optical axis, based on the first location information and the second location information.

4. In paragraph 3, The actuator for the above camera module further includes a control unit for controlling the driving unit, An actuator for a camera module, wherein the control unit compares the linear position information of the OIS carrier previously stored in the memory unit with the real-time position information of the OIS carrier detected from the position detection sensor to control the position of the OIS carrier.

5. In paragraph 1, The above magnet, A first magnet arranged on the second side so as to face the two first detection sensors, A second magnet arranged on a third side that is parallel to the optical axis and perpendicular to the second side, An actuator for a camera module including a third magnet arranged on the AF carrier so as to be parallel to the guide surface.

6. In paragraph 5, The above OIS carrier is an actuator for a camera module, wherein the first side faces the inner side of the surface on which the third magnet is mounted in the AF carrier.

7. In paragraph 2, An actuator for a camera module in which the guide surface is formed to have a symmetrical shape along the second direction with respect to the center of the first side on the first side.

8. In paragraph 1, The first side includes a first portion and a second portion that protrudes further in the first direction than the first portion, An actuator for a camera module in which the above guide surface is formed to be positioned in the second part.

9. In paragraph 1, The AF carrier moves along the optical axis direction with respect to the housing through the rolling motion of a plurality of first ball members arranged along the optical axis direction between one surface of the AF carrier and one surface of the housing facing each other, An actuator for a camera module that moves along a direction perpendicular to the optical axis with respect to the AF carrier through the rolling motion of a plurality of second ball members arranged between one side of the OIS carrier and one side of the AF carrier facing each other.

10. In paragraph 1, The above position detection sensor is an actuator for a camera module that is a Hall sensor.

11. In paragraph 1, The above position detection sensor is an actuator for a camera module formed integrally with a driving chip.

12. An initial setting method for image stabilization of a camera module including an AF carrier, an OIS carrier positioned on the AF carrier so as to directly face one side of the AF carrier, and a housing that accommodates the AF carrier and the OIS carrier, A first step of moving the OIS carrier in a first direction perpendicular to the optical axis, and moving the OIS carrier in a straight line along a second direction perpendicular to both the optical axis and the first direction while the AF carrier or housing and the OIS carrier are in close contact with each other, and generating first position information of the OIS carrier with respect to the second direction; and A second step of moving the OIS carrier in a straight line along the first direction based on the first location information and generating second location information of the OIS carrier for the first direction; and An initial setting method for image stabilization of a camera module, comprising: a third step of generating third position information in which the center of the OIS carrier coincides with the optical axis based on the first position information and the second position information; 13. In paragraph 12, The above OIS carrier includes a guide surface that protrudes in a first direction perpendicular to the optical axis from a first side parallel to the optical axis, The above guide surface is formed as a horizontal plane whose length formed in a direction parallel to the optical axis is shorter than the length formed in a direction perpendicular to the optical axis. The above first step is, An initial setting method for camera module shake correction performed while the above guide surface is in close contact with one side of the AF carrier or one side of the housing.

14. In paragraph 13, An initial setting method for compensating for camera shake in a camera module, wherein the guide surface is formed as a horizontal plane extending integrally along the second direction while being located at the center of the first side.

15. In paragraph 14, An initial setting method for compensating for hand shake of a camera module, wherein the guide surface is formed to have a symmetrical shape along the second direction with respect to the center of the first side on the first side.

16. In paragraph 12, The above first step is, It is performed in a state where the rotation of the OIS carrier moving in a straight line along the second direction is suppressed, An initial setting method for compensation of hand shake of a camera module in which rotation is suppressed based on information obtained through two first detection sensors arranged so as to face a second side that is perpendicular to the first side and parallel to the optical axis in the first step.

17. In paragraph 12, The second step above is, An initial setting method for camera module shake correction, which is performed by moving the OIS carrier in a straight line along the first direction while the center of the OIS carrier is located at the center of the entire range of motion of the OIS carrier in the second direction based on the first location information.

18. In paragraph 16, An initial setting method for camera shake correction of a camera module, wherein the second position information is generated through a second detection sensor arranged to face a third side that is parallel to the optical axis and perpendicular to the second side.

Images