Camera module

Abstract

The camera module includes: a housing; a lens module disposed in the housing and movable in an optical axis direction; a reflection module disposed in front of the lens module and rotatable relative to the housing; a driving portion including a magnet disposed on the lens module and a coil disposed to face the magnet in a first axial direction perpendicular to the optical axis direction; and a plurality of ball supports disposed between the lens module and the housing, a traction magnet disposed on the lens module, and a traction yoke disposed on the housing, the traction magnet and the traction yoke facing each other in a second axial direction perpendicular to both the optical axis direction and the first axial direction, the plurality of ball supports including three ball supports, two of the three ball supports are disposed between one side of the lens module and the housing, the remaining one of the three ball supports is disposed between the other side of the lens module and the housing, and the traction magnet is disposed closer to the two ball supports than to the one ball support.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2019-0050936, filed on April 30, 2019, and Korean Patent Application No. 10-2019-0085338, filed on July 15, 2019, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference in their entirety for all purposes. Technical Field

[0003] The following description relates to a camera module. Background Art

[0004] In addition to being installed in smart phones, cameras have also been generally installed in portable electronic devices such as tablet personal computers (PCs), laptop computers, etc., and an auto focus (AF) function, an optical image stabilization (OIS) function, a zoom function, etc. have been added to cameras for mobile terminals.

[0005] However, for implementation of various functions, the structure of the camera module has become complicated and the size of the camera module has increased, resulting in an increase in the size of a portable electronic device in which the camera module is mounted.

[0006] Furthermore, when directly moving a lens or image sensor for optical image stabilization, the weight of the lens or image sensor itself, as well as the weight of other components to which it is attached, must be considered. This requires a higher level of driving force, which increases power consumption.

[0007] Furthermore, to implement AF and zoom functions, a certain distance must be maintained so that the lens can move along the optical axis. However, this configuration can be difficult to achieve due to the thinness of the camera module. Summary of the Invention

[0008] This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

[0009] A camera module has a simple configuration and a reduced size while implementing functions such as an auto focus (AF) function, a zoom function, an optical image stabilization (OIS) function, etc.

[0010] A camera module having a plurality of lens groups, wherein the plurality of lens groups can be easily aligned in an optical axis direction.

[0011] The zoom lens and the reflection module are provided with stoppers or buffers so as not to be separated from the optimal positions.

[0012] In order to maximize the performance of the zoom lens, it is intended to accurately measure the moving position of the zoom lens through a plurality of position detection sensors (such as Hall sensors).

[0013] In one general aspect, a camera module includes: a housing; a lens module disposed within an interior space of the housing so as to be movable in an optical axis direction and including at least one lens; a magnet disposed within the lens module; and position detection sensors configured to detect a position of the magnet. One or more of the position detection sensors are disposed to face a first polarity of the magnet, and one or more of the position detection sensors are disposed to face a second polarity of the magnet that is different from the first polarity.

[0014] The magnet may be a two-pole magnet magnetized to have an N pole, a neutral region, and an S pole, or may be a magnet in which separate magnets having an N pole and an S pole are arranged adjacent to each other.

[0015] Each of the position detection sensors may be disposed to face only the N pole or the S pole of the magnet.

[0016] The position detection sensors include a first position detection sensor disposed to face the N pole, a second position detection sensor disposed to face the S pole, and a third position detection sensor disposed to face an area between the N pole and the S pole.

[0017] The position detection sensors may be spaced apart from each other at equal intervals along the optical axis direction.

[0018] The camera module may include a coil provided in the housing and configured to face the magnet, and the position detection sensor may be provided inside a winding of the coil.

[0019] The position of the magnet can be calculated based on a position value obtained by summing all sensing values ​​of the position detection sensors.

[0020] The position value can be all different values ​​within the range of movement of the magnet.

[0021] In another general aspect, a camera module includes: a housing; a lens module disposed within an interior space of the housing so as to be movable in an optical axis direction, the lens module including at least one lens therein; a magnet disposed within the lens module and including at least one north pole and at least one south pole alternately arranged along the optical axis; and position detection sensors for detecting a position of the magnet. One or more of the position detection sensors are disposed so as to face a first pole of the magnet, and one or more of the position detection sensors are disposed so as to face a second pole of the magnet.

[0022] The magnet may be a three-pole magnet magnetized to have at least three polarities including at least one N pole and at least one S pole, or may be a magnet in which at least three separate magnets each having an N pole and an S pole are arranged adjacent to each other.

[0023] The first pole of the magnet may have the same polarity as the second pole of the magnet, and the number of position detection sensors disposed facing the first pole of the magnet may be the same as the number of position detection sensors disposed facing the second pole of the magnet.

[0024] The first pole of the magnet may have the same polarity as the second pole of the magnet, the magnet may include a third pole arranged between the first pole and the second pole along the optical axis direction, and the first pole and the second pole may be spaced apart from the third pole at an equal distance along the optical axis direction.

[0025] The position detection sensor may include at least four position detection sensors, including a first position detection sensor, a second position detection sensor, a third position detection sensor and a fourth position detection sensor, the first position detection sensor being arranged to face the first pole at its first end along the optical axis, the second position detection sensor being arranged to face the first pole at its second end along the optical axis, the third position detection sensor being arranged to face the second pole at its first end along the optical axis, and the fourth position detection sensor being arranged to face the second pole at its second end along the optical axis.

[0026] The position detection sensor may include a fifth position detection sensor disposed between the first and second position detection sensors along the optical axis direction and a sixth position detection sensor disposed between the third and fourth position detection sensors along the optical axis direction.

[0027] The position detection sensors may include a first group of position detection sensors and a second group of position detection sensors, wherein the first group of position detection sensors are spaced apart at equal intervals along the optical axis and are arranged to face the first pole, and the second group of position detection sensors are spaced apart at equal intervals along the optical axis and are arranged to face the second pole.

[0028] The camera module may include a first coil and a second coil, wherein the first coil is fixed to the housing and disposed in the housing to face a first pole of the magnet, and the second coil is fixed to the housing and disposed in the housing to face a second pole of the magnet. The first pole of the magnet may have the same polarity as the second pole of the magnet.

[0029] In another general aspect, a camera module includes: a housing; a lens module including at least one lens and configured to move within the housing along an optical axis; a magnet disposed in the lens module and including at least two magnetic poles alternately arranged along the optical axis; and a position detection sensor including at least one position detection sensor disposed to face a first pole of the magnet and at least one position detection sensor disposed to face a second pole of the magnet.

[0030] The first pole may have the same polarity as the second pole, the magnet may include a third pole having a polarity different from the first and second poles, and the third pole may be disposed between the first and second poles along the optical axis direction.

[0031] The first pole may have a polarity different from a polarity of the second pole.

[0032] The position detection sensor may include at least one position detection sensor provided in a neutral region between the first pole and the second pole along the optical axis direction.

[0033] Other features and aspects will be apparent from the following detailed description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a perspective view of a portable electronic device according to an example.

[0035] Figure 2 is a perspective view of a camera module according to an example.

[0036] Figure 3A and Figure 3B is a cross-sectional view of a camera module according to an example.

[0037] Figure 4 is an exploded perspective view of a camera module according to an example.

[0038] Figure 5 is an exploded perspective view of a housing of a camera module according to an example.

[0039] Figure 6A is a perspective view of a reflective module and a lens module coupled to a housing of a camera module according to an example.

[0040] Figure 6B is a perspective view of a reflective module and a lens module coupled to a housing of a camera module according to another example.

[0041] Figure 7 is a perspective view of a board with a driving coil and a sensor mounted thereon, the board being coupled to a housing of a camera module according to an example.

[0042] Figure 8A is an exploded perspective view of a rotating plate and a rotating holder in a camera module according to an example.

[0043] Figure 8B is an exploded perspective view of a rotating plate and a rotating holder in a camera module according to another example.

[0044] Figure 9A is an exploded perspective view of a housing and a rotation holder in a camera module according to an example.

[0045] Figure 9B is an exploded perspective view of a housing and a rotation holder in a camera module according to another example.

[0046] Figure 10 is an exploded perspective view of a housing and a lens barrel according to an example.

[0047] Figure 11 is a perspective view showing a buffer of a rotation holder and a stopper of a zoom lens installed according to an example.

[0048] Figure 12 Among them Figure 11 An exploded perspective view of the rotation holder's buffer and the zoom lens' stopper being disassembled.

[0049] Figure 13A is a perspective view illustrating another example of a zoom lens movement guide groove provided in a housing according to an example.

[0050] Figure 13B It shows where the Figure 13A Reference view of the shape of the zoom lens.

[0051] Figure 14 is a reference view illustrating an example of a structure in which a zoom lens according to an example is fixed at a predetermined position.

[0052] Figure 15 and Figure 16 is a reference view illustrating another example of a structure in which a zoom lens according to an example is accurately fixed at a predetermined position.

[0053] Figure 17A is a view illustrating a positional relationship between a magnet and four hall sensors provided in a lens barrel according to an example.

[0054] Figure 17B It is shown in Figure 17A Graph showing sensing values ​​of four Hall sensors according to movement of the lens barrel in the illustrated positional relationship.

[0055] Figure 18A and Figure 19A It is shown in Figure 17A The positional relationships shown are merely a view of another example with a modified number of Hall sensors.

[0056] Figure 18B and Figure 19B It is shown in Figure 18A and Figure 19A A graph showing sensing values ​​of the Hall sensor according to movement of the lens barrel in another exemplary positional relationship is shown.

[0057] Figure 20A is a view illustrating a positional relationship between a magnet and four hall sensors provided in a lens barrel according to another example.

[0058] Figure 20B It shows Figure 20A Graph showing sensing values ​​of four Hall sensors according to movement of the lens barrel in the illustrated positional relationship.

[0059] Figure 21A It is shown in Figure 20A The positional relationships shown are merely a view of another example with a modified number of Hall sensors.

[0060] Figure 21B It is shown in Figure 21A Graph showing sensing values ​​of six Hall sensors according to the movement of the lens barrel in the positional relationship shown.

[0061] Figure 22 is a perspective view of a main board and coils and components mounted thereon according to an example.

[0062] Figure 23 is a perspective view of a portable electronic device according to another example.

[0063] Throughout the drawings and detailed description, the same reference numerals denote the same elements. For clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative sizes, proportions, and descriptions of the elements in the drawings may be exaggerated. DETAILED DESCRIPTION

[0064] The following detailed description is provided to help the reader fully understand the methods, devices and / or systems described herein. However, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent to those of ordinary skill in the art. The order of operations described herein is merely an example and is not limited to the order of operations described herein, but can be changed except for operations that must occur in a specific order, which will be apparent to those of ordinary skill in the art. In addition, for the sake of clarity and brevity, descriptions of functions and structures well known to those of ordinary skill in the art may be omitted.

[0065] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0066] In this document, it should be noted that the use of the term "may" with respect to an example or embodiment, for example with respect to what an example or embodiment may include or implement, means that there is at least one example or embodiment that includes or implements such features, but not all examples and embodiments are limited thereto.

[0067] Throughout the specification, when an element such as a layer, a region, or a substrate is described as being “on,” “connected to,” or “coupled to” another element, it may be directly “on,” directly “connected to,” or directly “coupled to” the other element, or one or more other elements may be intervening therebetween. Conversely, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, there may not be any other elements intervening therebetween.

[0068] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more of the associated listed items.

[0069] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Instead, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, without departing from the teachings of the examples described herein, a first member, first component, first region, first layer, or first portion mentioned in the examples may also be referred to as a second member, second component, second region, second layer, or second portion.

[0070] For ease of description, spatially relative terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. In addition to the orientation shown in the accompanying drawings, such spatially relative terms are intended to also include different orientations of the device in use or operation. For example, if the device in the accompanying drawings is flipped, an element described as being "above" or "upper" relative to another element will be "below" or "lower" relative to the other element. Therefore, the term "above" includes both above and below orientations, depending on the spatial orientation of the device. The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used in this article will be interpreted accordingly.

[0071] The terms used herein are for describing various examples only and are not intended to limit the present disclosure. The articles "a," "an," and "the" are intended to include plural forms as well, unless the context clearly indicates otherwise. The terms "include," "comprising," and "having" specify the presence of stated features, numbers, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, components, elements, and / or combinations thereof.

[0072] Due to manufacturing techniques and / or tolerances, the shapes shown in the drawings may vary. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shape that occur during manufacturing.

[0073] The features of the examples described herein can be combined in various ways, as will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have multiple configurations, other configurations are also possible, as will be apparent after understanding the disclosure of the present application.

[0074] Figure 1 is a perspective view of a portable electronic device according to an example.

[0075] refer to Figure 1 , the portable electronic device 1 according to an example may be a portable electronic device in which the camera module 1000 is installed, such as a mobile communication terminal, a smart phone, a tablet personal computer (PC), etc.

[0076] like Figure 1 As shown, the portable electronic device 1 may be provided with a camera module 1000 to capture an image of a subject.

[0077] In this example, the camera module 1000 may include multiple lenses, and the optical axis (Z-axis) of the lens may be set in a direction perpendicular to the thickness direction of the portable electronic device 1 (Y-axis direction, or the direction from the front surface of the portable electronic device to its rear surface, or the direction opposite to the direction from the front surface of the portable electronic device to its rear surface).

[0078] In an example, optical axes (Z axes) of the plurality of lenses provided in the camera module 1000 may be formed in a width direction or a length direction of the portable electronic device 1 .

[0079] Therefore, even when the camera module 1000 has an AF function, a zoom function, an OIS function, etc., the thickness of the portable electronic device 1 can be made not to increase. Therefore, the portable electronic device 1 can be made thinner.

[0080] The camera module 1000 according to an example may have an AF function, a zoom function, and an OIS function.

[0081] The camera module 1000 having the AF function, the zoom function, and the OIS function requires various components, resulting in an increase in size of the camera module 1000 compared to a conventional camera module.

[0082] The increased size of the camera module 1000 may cause problems regarding miniaturization of the portable electronic device 1 in which the camera module 1000 is mounted.

[0083] For example, camera modules are increasingly stacked with lenses for zoom functionality. When multiple lenses are stacked in the thickness direction of a portable electronic device, the thickness of the portable electronic device may increase depending on the number of stacked lenses. Consequently, it may be impossible to ensure a sufficient number of stacked lenses without increasing the thickness of the portable electronic device, resulting in a deterioration in zoom functionality.

[0084] Furthermore, to implement AF, zoom, and OIS functions, actuators are required to move the multiple lens groups in the direction of the optical axis or in a direction perpendicular thereto. If the optical axis (Z-axis) of the lens groups is aligned with the thickness of the portable electronic device, the actuators for moving the lens groups should also be installed in that direction. Consequently, the thickness of the portable electronic device may increase.

[0085] Since the optical axes (Z axes) of the multiple lenses are arranged perpendicular to the thickness direction of the portable electronic device 1, the portable electronic device 1 can be made thinner even when the camera module 1000 having AF, zoom and OIS functions is mounted.

[0086] Figure 2 is a perspective view of a camera module according to an example, Figure 3A and Figure 3Bis a cross-sectional view of a camera module according to an example, and Figure 4 is an exploded perspective view of a camera module according to an example.

[0087] refer to Figures 2 to 4 , the camera module 1000 may include a reflection module 1100 , a lens module 1200 , and an image sensor module 1300 provided in a housing 1010 .

[0088] The reflective module 1100 may be configured to change the direction of light movement. For example, the direction of light incident through the opening portion 1031 of the cover 1030 covering the upper portion of the camera module 1000 may be changed by the reflective module 1100 to a direction toward the lens module 1200. To this end, the reflective module 1100 may include a reflective member 1110 configured to reflect light.

[0089] For example, the path of light incident through the thickness direction (Y-axis direction) of the camera module 1000 can be changed by the reflection module 1100 so that the moving direction of the incident light can be substantially the same as the optical axis (Z-axis) direction.

[0090] The lens module 1200 may include a plurality of lenses through which light having its movement direction changed by the reflection module 1100 passes. The lens module 1200 may include at least three lens barrels 1210, 1220, and 1230. The AF function and the zoom function may be implemented based on the movement of the at least three lens barrels 1210, 1220, and 1230 in the optical axis (Z-axis) direction. In addition, in this example, any one of the at least three lens barrels 1210, 1220, and 1230, such as lens barrel 1230, may be fixed so that it does not move in the optical axis direction. The AF function and the zoom function may be implemented by the fixed lens barrel 1230 and the remaining two lens barrels 1210 and 1220.

[0091] The image sensor module 1300 may include an image sensor 1310 that converts light that has passed through a plurality of lenses into an electrical signal, and a printed circuit board 1320. The image sensor 1310 may be mounted on the printed circuit board 1320. In addition, the image sensor module 1300 may include an optical filter 1340 that filters incident light that has passed through the lens module 1200. The optical filter 1340 may be an infrared cutoff filter.

[0092] In the internal space of the housing 1010 , the reflection module 1100 may be disposed in front of the lens module 1200 (along the Z-axis direction), and the image sensor module 1300 may be disposed behind the lens module 1200 (along the Z-axis direction).

[0093] refer to Figures 2 to 22, the camera module 1000 may include a reflection module 1100 , a lens module 1200 , and an image sensor module 1300 , which may be disposed in a housing 1010 .

[0094] The reflection module 1100, the lens module 1200, and the image sensor module 1300 may be sequentially arranged from one side to the other in the housing 1010. The housing 1010 may be configured to have an internal space such that the reflection module 1100, the lens module 1200, and the image sensor module 1300 may all be embedded therein (the printed circuit board 1320 included in the image sensor module 1300 may be attached to the outside of the housing 1010).

[0095] For example, as shown in the drawings, the housing 1010 may be integrally provided so that the reflection module 1100 and the lens module 1200 may be embedded in its inner space. However, the configuration may not be limited thereto, and for example, separate housings in which the reflection module 1100 and the lens module 1200 are respectively embedded may be connected to each other.

[0096] The housing 1010 may be covered by the cover 1030 so that the internal space is not exposed.

[0097] The cover 1030 may include an opening portion 1031 so that light is incident through the opening portion 1031, and a moving direction of the light incident through the opening portion 1031 may be changed by the reflection module 1100, thereby causing the light to be incident on the lens module 1200. The cover 1030 may be integrally provided to cover the entire housing 1010, or divided and provided as separate components that respectively cover the reflection module 1100 and the lens module 1200.

[0098] The reflection module 1100 may include a reflection member 1110 that reflects light. In addition, light incident on the lens module 1200 may pass through a plurality of lens groups (at least three lens barrels 1210, 1220, and 1230), and then may be converted into an electrical signal by the image sensor 1310 and stored.

[0099] The housing 1010 may include a reflective module 1100 and a lens module 1200 in an internal space. The reflective module 1100 may be disposed at the front side of the internal space of the housing 1010, and the lens module 1200 may be disposed at the rear side of the internal space of the housing 1010. The spaces in which the lens modules 1200 may be disposed may be separated from each other by protruding walls 1009. The protruding walls 1009 may be configured to protrude from both sidewalls of the housing 1010 toward the internal space.

[0100] When the reflection module 1100 is provided on the front side, the rotation holder 1120 can be tightly attached to and supported on the inner wall surface of the housing 1010 by the attraction between the traction yoke 1153 provided on the inner wall surface of the housing 1010 and the traction magnet 1151 provided on the rotation holder 1120. Although not shown in the drawings, the housing 1010 may also be provided with a traction magnet, and the rotation holder 1120 may also be provided with a traction yoke. In the following, for the sake of convenience of explanation, the structure shown in the drawings will be described.

[0101] The first ball bearing 1131 , the rotation plate 1130 , and the second ball bearing 1133 may be disposed between the inner wall surface of the housing 1010 and the rotation holder 1120 .

[0102] As will be described in detail below, since the first ball bearings 1131 and the second ball bearings 1133 can be partially fitted into the guide grooves 1132, 1134, 1021, and 1121, thereby closely adhering thereto, a small space may be required between the rotation holder 1120 and the protruding wall 1009 when the rotation holder 1120 and the rotation plate 1130 are fitted into the interior space of the housing 1010. When the rotation holder 1120 is mounted on the housing 1010, the rotation holder 1120 can closely adhere to the inner wall surface of the housing 1010 by the attraction between the pull yoke 1153 and the pull magnet 1151, thereby allowing a relatively small space to be formed between the rotation holder 1120 and the third lens barrel 1230.

[0103] In this example, a buffer 1050 may be included, which may be assembled to the upper portion of the housing 1010 while supporting the rotating retainer 1120 (of course, even without the buffer 1050, it may be fixed by the attraction between the pulling magnet 1151 and the pulling yoke 1153).

[0104] The buffer member 1050 may include a frame 1051 fitted to the upper portion of the housing 1010, a locking portion 1055, and an extension portion 1052 extending downward (e.g., in the Y-axis direction) from the frame 1051. The extension portion 1052 may include a buffer material 1053 so as to protrude in the optical axis direction toward the rotation holder 1120. The buffer material 1053 may be provided so as to be fitted into a through hole provided in the extension portion 1052, and the buffer material 1053 may be any material as long as it is an elastic material, such as urethane, silicone resin, epoxy resin, polymer material, etc.

[0105] The locking portion 1055 may be locked when assembled to the exterior of the housing 1010. The housing 1010 may be provided with an insertion slot 1019 (eg, see Figure 5), the frame 1051 and the extension portion 1052 are assembled into the insertion groove 1019. The insertion groove 1019 may include a first insertion groove 1019a provided along the inner side of the upper edge of the housing 1010, a second insertion groove 1019b extending downwardly from the other end of the first insertion groove 1019a perpendicular to the optical axis direction, and a third insertion groove 1019c provided at one end of the first insertion groove 1019a along the outer side of the housing 1010 (for example, see Figure 12 ).

[0106] Since the frame 1051 can be assembled into the first insertion groove 1019a, the locking portion 1055 provided at one end of the frame 1051 can be assembled to the outside of the housing 1010, and the extension portion 1052 provided at the other side end of the frame 1051 can be assembled into the second insertion groove 1019b, the frame 1051 can be firmly fixed so as not to move in the optical axis direction. In addition, an adhesive can be applied between the frame 1051 and the housing 1010 to further bond them to each other.

[0107] The buffer material 1053 may be provided so as to fit into a through hole provided in the extension portion 1052 (of course, the buffer material 1053 may be attached to one or both sides of the extension portion 1052 by bonding with an adhesive). The buffer material 1053 may be provided so as to protrude to both sides of the extension portion 1052. The buffer material 1053 may be used as a buffer for absorbing the impact of the rotating holder 1120 or a stopper for limiting the moving distance, and the third lens barrel 1230 may be fixed ( Figure 6B In this case, one side of the third lens barrel 1230 in the optical axis direction may be supported.

[0108] When the reflection module 1100 is not driven, the buffer 1050 can serve as a bracket supporting the rotating holder 1120, and when the reflection module 1100 is driven, the buffer 1050 can serve as a buffer or stopper to control the movement of the rotating holder 1120. A space can be provided between the buffer 1050 and the rotating holder 1120 so that the rotating holder 1120 rotates smoothly. Optionally, the buffer 1050 can be formed of an elastic material to allow the rotating holder 1120 to move smoothly while being supported by the buffer 1050 even when the buffer 1050 is in contact with the rotating holder 1120.

[0109] The housing 1010 may include a first driving portion 1140 and a second driving portion 1240 configured to respectively drive the reflection module 1100 and the lens module 1200. The first driving portion 1140 may include a plurality of coils 1141b, 1143b, and 1145b for driving the reflection module 1100, and the second driving portion 1240 may include a plurality of coils 1241b, 1243b, and 1245b for driving the lens module 1200, wherein the lens module 1200 may include a first lens barrel 1210, a second lens barrel 1220, and a third lens barrel 1230.

[0110] In addition, since multiple coils 1141b, 1143b, 1145b, 1241b, 1243b and 1245b can be set in the shell 1010 in a state where they are mounted on the main board 1070, the shell 1010 can be provided with multiple through holes 1010a, 1010b, 1010c, 1010d, 1010e, 1010f and 1010g, so that the multiple coils 1141b, 1143b, 1145b, 1241b, 1243b and 1245b can be exposed to the internal space of the shell 1010.

[0111] The main board 1070, on which the coils 1141b, 1143b, 1145b, 1241b, 1243b, and 1245b can be mounted, can be completely connected to each other to be provided as a single board, as shown in the accompanying drawings. In this case, a single terminal can be provided, making it easy to connect external power. The main board 1070 is not limited to this configuration and can also be provided as multiple boards by separating the board on which the coils for the reflector module 1100 are mounted and the board on which the coils for the lens module 1200 are mounted.

[0112] The reflective module 1100 can change the path of light incident through the opening portion 1031. When capturing still images or moving images, the still image may be blurred or the moving image may be shaky due to hand shaking or other user movement. In this case, the reflective module 1100 can stabilize the hand shaking or other user movement by moving the rotating holder 1120 on which the reflective member 1110 is mounted. For example, when shaking occurs due to hand shaking or other movement of the user when capturing still images or moving images, the rotating holder 1120 can be provided with a relative displacement corresponding to the shaking to compensate for the shaking.

[0113] The OIS function may be implemented by the movement of the rotating holder 1120 having a relatively low weight because it does not include a lens, etc., and thus the power consumption of the OIS function may be significantly reduced.

[0114] For example, for OIS function implementation, the moving direction of light can be changed by moving the rotating holder 1120 on which the reflective member 1110 is provided without moving the lens barrel or image sensor including multiple lenses, so that light on which OIS is performed can be incident to the lens module 1200.

[0115] The reflection module 1100 may include a rotation holder 1120 disposed to be supported by the housing 1010 , a reflection member 1110 mounted on the rotation holder 1120 , and a first driving part 1140 to move the rotation holder 1120 .

[0116] The reflective member 1110 may change the direction of light movement. For example, the reflective member 1110 may be a mirror or a prism that reflects light (for ease of explanation, the reflective member 1110 may be illustrated as a prism in the drawings).

[0117] The reflective member 1110 may be fixed to a rotation holder 1120. The rotation holder 1120 has a mounting surface 1122 on which the reflective member 1110 is mounted.

[0118] The mounting surface 1122 of the rotating holder 1120 may be an inclined surface to change the path of light. The mounting surface 1122 may be a surface inclined 30° to 60° relative to the optical axis (Z axis) of the multiple lenses. The inclined surface of the rotating holder 1120 may be directed toward the opening portion 1031 of the cover 1030, where light is incident.

[0119] The rotating holder 1120 on which the reflective member 1110 is mounted may be mounted to be movable within the interior space of the housing 1010. For example, the rotating holder 1120 may be mounted in the housing 1010 so as to be rotatable about a first axis (X axis) and a second axis (Y axis). The first axis (X axis) and the second axis (Y axis) may refer to axes perpendicular to the optical axis (Z axis) and may be perpendicular to each other.

[0120] The rotating holder 1120 can be supported in the housing 1010 by a first ball bearing 1131 aligned along a first axis (X axis) and a second ball bearing 1133 aligned along a second axis (Y axis), allowing the rotating holder 1120 to smoothly rotate about the first axis (X axis) and the second axis (Y axis). As an example, the figure shows two first ball bearings 1131 aligned along the first axis (X axis) and two second ball bearings 1133 aligned along the second axis (Y axis). As described below, the rotating holder 1120 can be rotated about the first axis (X axis) and the second axis (Y axis) by the first drive portion 1140.

[0121] In addition, the first ball support 1131 and the second ball support 1133 can be respectively arranged on the front surface and the rear surface of the rotating plate 1130 (or alternatively, the first ball support 1131 and the second ball support 1133 can be respectively arranged on the rear surface and the front surface of the rotating plate 1130; that is, the first ball support 1131 can be aligned along the second axis (Y axis), and the second ball support 1133 can be aligned along the first axis (X axis); for ease of explanation, the structure shown in the drawings will be described below). The rotating plate 1130 can be arranged between the rotating holder 1120 and the inner surface of the housing 1010.

[0122] The rotating retaining member 1120 can be supported in the housing 1010 by the rotating plate 1130 using the attraction between the traction magnet 1151 or traction yoke set on the rotating retaining member 1120 and the traction yoke 1153 or traction magnet set on the housing 1010 (the first ball support member 1131 and the second ball support member 1133 can also be set between the rotating retaining member 1120 and the housing 1010).

[0123] The guide grooves 1132 and 1134 may be provided on the front and rear surfaces of the rotating plate 1130 so that the first ball support 1131 and the second ball support 1133 are respectively inserted therein. The guide grooves 1132 and 1134 may include a first guide groove 1132 into which the first ball support 1131 is partially inserted and a second guide groove 1134 into which the second ball support 1133 is partially inserted.

[0124] The housing 1010 may be provided with a third guide groove 1021 into which the first ball bearing 1131 is partially inserted, and the rotation holder 1120 may be provided with a fourth guide groove 1121 into which the second ball bearing 1133 is partially inserted.

[0125] The above-mentioned first guide groove 1132, second guide groove 1134, third guide groove 1021 and fourth guide groove 1121 can be set to a hemispherical or polygonal (polygonal column or polyhedral pyramid) groove shape, so that the first ball support 1131 and the second ball support 1133 can easily rotate therein.

[0126] The first ball support 1131 and the second ball support 1133 may function as bearings while rolling or sliding in the first guide groove 1132 , the second guide groove 1134 , the third guide groove 1021 , and the fourth guide groove 1121 .

[0127] like Figure 8B and Figure 9BAs shown, the first ball bearing 1131 a and the second ball bearing 1133 a may be fixed to both surfaces of the rotating plate 1130 , respectively.

[0128] The configuration is not limited thereto, and the first ball bearing 1131a and the second ball bearing 1133a may have a structure in which they are fixedly provided in at least one of the housing 1010, the rotating plate 1130, and the rotating holder 1120. For example, the first ball bearing 1131a may be fixedly provided in the housing 1010 or on the rotating plate 1130, and the second ball bearing 1133a may be fixedly provided on the rotating plate 1130 or the rotating holder 1120. In this case, only the member facing the member in which the first ball bearing 1131a or the second ball bearing 1133b is fixedly provided may be provided with a guide groove, and the ball bearings may function as friction bearings by sliding rather than rotating.

[0129] Furthermore, the first ball bearing 1131 and the second ball bearing 1133 may be manufactured separately and then attached to any one of the housing 1010, the rotating plate 1130, and the rotating holder 1120. Alternatively, the first ball bearing 1131 and the second ball bearing 1133 may be integrally provided with the housing 1010, the rotating plate 1130, or the rotating holder 1120 when the housing 1010, the rotating plate 1130, or the rotating holder 1120 is manufactured.

[0130] The first driving portion 1140 generates a driving force so that the rotation holder 1120 can rotate about two axes.

[0131] As an example, the first driving part 1140 may include a plurality of magnets 1141 a , 1143 a , and 1145 a , and a plurality of coils 1141 b , 1143 b , and 1145 b arranged to face the plurality of magnets 1141 a , 1143 a , and 1145 a , respectively.

[0132] When power is supplied to the multiple coils 1141b, 1143b and 1145b, the rotating holder 1120 on which the magnets 1141a, 1143a and 1145a can be mounted can rotate around the first axis (X-axis) and the second axis (Y-axis) through the electromagnetic effect between the multiple magnets 1141a, 1143a and 1145a and the multiple coils 1141b, 1143b and 1145b.

[0133] A plurality of magnets 1141a, 1143a, and 1145a may be mounted on the rotating holder 1120. As an example, the magnet 1141a may be mounted on a lower surface of the rotating holder 1120, and the remaining magnets 1143a and 1145a may be mounted on side surfaces of the rotating holder 1120.

[0134] The plurality of coils 1141b, 1143b, and 1145b may be mounted on the housing 1010. As an example, the plurality of coils 1141b, 1143b, and 1145b may be mounted on the housing 1010 through the main board 1070. The plurality of coils 1141b, 1143b, and 1145b may be provided on the main board 1070, and the main board 1070 may be mounted on the housing 1010.

[0135] In the accompanying drawings, an example is shown in which the main board 1070 can be provided integrally so that the coil for the reflection module 1100 and the coil for the lens module 1200 can both be mounted thereon. The main board 1070 can be provided as at least two separate boards, and the coil for the reflection module 1100 and the coil for the lens module 1200 can be mounted on the boards respectively.

[0136] When rotating the rotating holder 1120 , a closed-loop control method may be used that involves sensing the position of the rotating holder 1120 and providing feedback.

[0137] Therefore, position detection sensors 1141c and 1143c may be required for closed-loop control. The position detection sensors 1141c and 1143c may be Hall sensors.

[0138] The position detection sensors 1141 c and 1143 c may be provided inside or outside the coils 1141 b and 1143 b , respectively, and may be mounted on the main board 1070 on which each of the coils 1141 b and 1143 b is mounted.

[0139] The main board 1070 may be provided with a gyro sensor (not shown) that senses jitter factors such as hand jitter or other user movements, and may be provided with a driver integrated circuit (IC; not shown) that provides driving signals to the plurality of coils 1141b, 1143b, and 1145b.

[0140] When the rotating holder 1120 rotates around the first axis (X-axis), the rotating plate 1130 can rotate around the first ball support 1131 arranged along the first axis (X-axis), which causes the rotating holder 1120 to also rotate (in this case, the rotating holder 1120 may not move relative to the rotating plate 1130).

[0141] In addition, when the rotating holder 1120 rotates around the second axis (Y axis), the rotating holder 1120 rotates around the second ball support 1133 arranged along the second axis (Y axis) (in this case, the rotating plate 1130 may not rotate, and the rotating holder 1120 can therefore move relative to the rotating plate 1130).

[0142] For example, when the rotating holder 1120 rotates around the first axis (X axis), the first ball bearing 1131 can operate, and when the rotating holder 1120 rotates around the second axis (Y axis), the second ball bearing 1133 can operate. This is because, as shown in the drawings, when the rotating holder 1120 rotates around the first axis (X axis), the second ball bearing 1133 aligned along the second axis (Y axis) cannot move while being fitted into the guide grooves 1134 and 1121, and when the rotating holder 1120 rotates around the second axis (Y axis), the first ball bearing 1131 aligned along the first axis (X axis) cannot move while being fitted into the guide grooves 1021 and 1132.

[0143] Light reflected on the reflection module 1100 may be incident on the lens module 1200. By moving at least three lens barrels 1210, 1220, and 1230 provided in the lens module 1200 in the optical axis direction (Z axis direction), an AF function or a zoom function may be implemented on the incident light.

[0144] refer to Figure 6A The two lens barrels 1210 and 1220 on the rear side can be responsible for the zoom function, and the lens barrel 1230 on the front side can be responsible for the AF function. In addition, the three lens barrels 1210, 1220 and 1230 can be responsible for the zoom function and the AF function in various combinations.

[0145] Various deformations can be additionally controlled. Figure 6B For example, the two rear lens barrels 1210 and 1220 perform a zoom function or an AF function individually or together, wherein, for example, the two lens barrels 1210 and 1220 are combined to perform a zoom function, and the rearmost lens barrel 1210 can also be responsible for the AF function, and the front lens barrel 1230 can remain fixed to the housing 1010. In addition, although not shown in the drawings, any one of the three lens barrels 1210, 1220, and 1230 can remain fixed to the housing 1010, while the remaining two lens barrels can be responsible for the zoom function or the AF function individually or together. In this case, the lens barrel fixed to the housing 1010 (e.g., lens barrel 1230) does not need to be placed between the drive magnet or the coil facing the drive magnet and the housing 1010. Ball bearings, etc.

[0146] The housing 1010 may be configured to include a space in which one front lens barrel 1230 and two rear lens barrels 1210 and 1220 may be separated by the protruding wall 1009, but may not be limited to this configuration. The three lens barrels 1210, 1220, and 1230 may be disposed in the same space or separated in separate spaces.

[0147] The plurality of stacked lens groups provided in the lens module 1200 may be respectively divided into at least three lens barrels 1210, 1220, and 1230. Even when the plurality of stacked lens groups are divided and provided in the at least three lens barrels 1210, 1220, and 1230, the optical axes may be aligned in the Z-axis direction (the direction in which light may be emitted from the reflection module 1100).

[0148] The lens module 1200 may include a second driving part 1240 to implement an AF function and a zoom function.

[0149] The lens module 1200 may include at least three lens barrels: a first lens barrel 1210, a second lens barrel 1220 and a third lens barrel 1230 in the internal space of the housing 1010, and may include a second driving part 1240, which moves the three lens barrels 1210, 1220 and 1230 in the optical axis (Z axis) direction relative to the housing 1010.

[0150] The first lens barrel 1210 , the second lens barrel 1220 , and the third lens barrel 1230 may be configured to move substantially in an optical axis (Z-axis) direction for a function AF or a zoom function.

[0151] In this regard, the second driving portion 1240 generates a driving force to move the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 in the optical axis (Z axis) direction. For example, the second driving portion 1240 implements an AF function or a zoom function by individually moving the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 in the optical axis (Z axis) direction.

[0152] The first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 may be configured to be supported on the bottom surface of the housing 1010. For example, the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 may be individually supported by ball bearings on the bottom surface of the housing 1010. Hereinafter, an example in which the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 may be individually supported by ball bearings on the bottom surface of the housing 1010 will be mainly described.

[0153] As an example, the second driving part 1240 may include a plurality of magnets 1241 a , 1243 a , and 1245 a , and a plurality of coils 1241 b , 1243 b , and 1245 b disposed to face the magnets 1241 a , 1243 a , and 1245 a , respectively.

[0154] When power is supplied to the coils 1241b, 1243b and 1245b, the first lens barrel 1210, the second lens barrel 1220 and the third lens barrel 1230, on which magnets 1241a, 1243a and 1245a may be mounted respectively, can move in the optical axis (Z-axis) direction through the electromagnetic effect between the magnets 1241a, 1243a and 1245a and the coils 1241b, 1243b and 1245b.

[0155] A plurality of magnets 1241a, 1243a, and 1245a may be respectively mounted on the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230. For example, the first magnet 1241a may be mounted on a side surface of the first lens barrel 1210, the second magnet 1243a may be mounted on a side surface of the second lens barrel 1220, and the third magnet 1245a may be mounted on a side surface of the third lens barrel 1230.

[0156] A plurality of coils 1241b, 1243b, and 1245b may be mounted on the housing 1010 to face the plurality of magnets 1241a, 1243a, and 1245a, respectively. Since the plurality of magnets 1241a, 1243a, and 1245a may be provided on both side surfaces of the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230, the plurality of coils 1241b, 1243b, and 1245b may be provided on both side walls to face the plurality of magnets 1241a, 1243a, and 1245a.

[0157] For example, the main board 1070 may be mounted on the housing 1010 with the plurality of coils 1241b, 1243b, and 1245b mounted thereon.

[0158] When moving the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230, a closed-loop control method involving sensing the positions of the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 and providing feedback may be used. Therefore, the closed-loop control may require position detection sensors 1241c, 1243c, and 1245c. The position detection sensors 1241c, 1243c, and 1245c may be Hall sensors.

[0159] The position detection sensors 1241 c , 1243 c , and 1245 c may be respectively disposed inside or outside the coils 1241 b , 1243 b , and 1245 b and may be mounted on the main board 1070 , wherein each of the coils 1241 b , 1243 b , and 1245 b may be mounted on the main board 1070 .

[0160] In the accompanying drawings, the first lens barrel 1210 and the second lens barrel 1220 can be driven by a pair of coils and magnets. In this case, the coils and magnets can be arranged on either side. The coils and magnets can have slightly increased sizes to enhance driving force. In this case, a plurality of position detection sensors 1241c and 1243c can be provided for accurate position sensing. In the accompanying drawings, four position detection sensors 1241c and 1243c can be provided inside each of the coils 1241b and 1243b that drive the first lens barrel 1210 and the second lens barrel 1220. This is because the first lens barrel 1210 and the second lens barrel 1220 can move a considerable distance along the optical axis direction to achieve zooming, and thus a sufficient number of Hall sensors should be provided to sense the correct position.

[0161] The first lens barrel 1210 may be disposed in the housing 1010 so as to be movable in the optical axis (Z axis) direction. For example, a plurality of third ball bearings 1215 may be disposed between the first lens barrel 1210 and the bottom surface of the housing 1010 .

[0162] The plurality of third ball bearings 1215 serve as bearings for guiding the movement of the first lens barrel 1210 in implementing the AF function and the zoom function.

[0163] The plurality of third ball bearings 1215 may be configured to roll in the optical axis (Z axis) direction when a driving force is generated to move the first lens barrel 1210 in the optical axis (Z axis) direction. Thus, the plurality of third ball bearings 1215 guide the movement of the first lens barrel 1210 in the optical axis (Z axis) direction.

[0164] A plurality of guide grooves 1214 and 1013, 1014 for accommodating the third ball support 1215 therein may be formed on the lower surface of the first lens barrel 1210 and on the bottom surface of the housing 1010 facing the first lens barrel 1210, and some of the guide grooves may extend in the optical axis (Z axis) direction.

[0165] A plurality of third ball bearings 1215 may be received in the guide grooves 1214 and 1013 , 1014 and may be inserted to fit between the first lens barrel 1210 and the housing 1010 .

[0166] Some or all of the guide grooves 1214 and 1013, 1014 may be elongated in the optical axis (Z-axis) direction. In addition, the cross-sections of the guide grooves 1214 and 1013, 1014 may have various shapes, such as a circular shape and a polygonal shape.

[0167] In this case, the first lens barrel 1210 can be pressed toward the bottom of the housing 1010 so that the plurality of third ball bearings 1215 can remain in contact with the first lens barrel 1210 and the housing 1010. To this end, the pulling yoke 1016 (see, for example, Figure 10 ) is mounted on the bottom surface of the housing 1010 to face the pulling magnet 1216 mounted on the lower surface of the first lens barrel 1210 (see, for example, Figure 10 The pulling yoke 1016 may be formed of a magnetic material. The pulling magnet may be mounted on the bottom surface of the housing 1010 , and the pulling yoke may be mounted on the lower surface of the first lens barrel 1210 .

[0168] The coil 1241b that drives the first lens barrel 1210 can be disposed on one side surface of the housing 1010. In this case, electromagnetic force acts on one side surface of the first lens barrel 1210, and thus the pull magnet 1216 and the pull yoke 1016 can be offset from the center of the housing 1010 toward one side surface to facilitate driving the first lens barrel 1210. The first lens barrel 1210 can include a main body 1210a and a magnet mounting portion 1210b extending in the optical axis direction to the side surface of the second lens barrel 1220, so that the size of the magnet 1241a can be increased to enhance the driving force. In addition, in order to increase the size of the magnet 1243a to enhance the driving force, the second lens barrel 1220 can include a main body 1220a and a magnet mounting portion 1220b extending in the optical axis direction to the side surface of the first lens barrel 1210.

[0169] The coil 1243b that drives the second lens barrel 1220 may be provided on the other side surface, which may be the opposite side surface of the housing 1010 to the one side surface on which the coil 1241b may be provided. In this case, since electromagnetic force may be applied to the other side surface of the second lens barrel 1220, the pulling magnet 1226 and the pulling yoke 1017 (for example, see Figure 10 ) can be offset from the center of the housing 1010 toward the other side surface to facilitate driving the second lens barrel 1220.

[0170] In addition, the coil 1245b that drives the third lens barrel 1230 can be provided on both side surfaces or one side surface of the housing 1010. When the coil 1245b is provided on only one side of the housing 1010, similarly to the first lens barrel 1210 and the second lens barrel 1220, the pulling magnet 1236 and the pulling yoke 1018 (for example, see Figure 10) can be offset from the center of the housing 1010 toward one side surface to facilitate driving the third lens barrel 1230. However, this refers to a case where the coils driving the lens barrels 1210, 1220, and 1230 can be provided on only one of the one side surface and the other side surface. When the coils are provided on both side surfaces, the pulling magnet and the pulling yoke can be provided approximately at the center of the housing 1010.

[0171] The second lens barrel 1220 may be disposed in the housing 1010 so as to be movable in the optical axis (Z axis) direction. As an example, the second lens barrel 1220 may be disposed in front of the first lens barrel 1210 so as to be parallel to the first lens barrel 1210 in the optical axis direction.

[0172] A plurality of fourth ball bearings 1225 may be disposed between the second lens barrel 1220 and the bottom surface of the housing 1010 , and the second lens barrel 1220 may slide relative to the housing 1010 through the fourth ball bearings 1225 .

[0173] The plurality of fourth ball bearings 1225 may be configured to assist the sliding movement of the second lens barrel 1220 in the optical axis direction (Z axis direction) when a driving force may be generated to move the second lens barrel 1220 in the optical axis (Z axis) direction.

[0174] A plurality of guide grooves 1224 and 1013 , 1014 in which the fourth ball bearings 1225 are accommodated may be formed on the lower surface of the second lens barrel 1220 and the bottom surface of the housing 1010 , and some of the guide grooves may be elongated in the optical axis (Z axis) direction.

[0175] The plurality of fourth ball bearings 1225 may be received in the guide grooves 1224 and 1013 , 1014 and may be inserted to fit between the second lens barrel 1220 and the housing 1010 .

[0176] Each of the plurality of guide grooves 1224 and 1013, 1014 may be elongated in the optical axis (Z axis) direction. In addition, the cross-section of the guide grooves 1224 and 1013, 1014 may be various shapes, such as a circular shape, a polygonal shape, and the like.

[0177] The second lens barrel 1220 may be pressed toward the bottom surface of the housing 1010 so that the fourth ball bearing 1225 may maintain contact with the second lens barrel 1220 and the housing 1010 .

[0178] To this end, a pulling yoke 1017 may be mounted on the bottom surface of the housing 1010 to face the pulling magnet 1226 mounted on the second lens barrel 1220. The pulling yoke 1017 may be made of a magnetic material. The pulling magnet may be mounted on the bottom surface of the housing 1010, and the pulling yoke may be mounted on the lower surface of the second lens barrel 1220.

[0179] The third lens barrel 1230 may be disposed in the housing 1010 so as to be movable in the optical axis (Z axis) direction. As an example, the third lens barrel 1230 may be disposed in front of the second lens barrel 1220 so as to be parallel to the second lens barrel 1220 in the optical axis direction.

[0180] A plurality of fifth ball bearings 1235 may be disposed between the third lens barrel 1230 and the bottom surface of the housing 1010 , and the third lens barrel 1230 may slide relative to the housing 1010 through the fifth ball bearings 1235 .

[0181] The plurality of fifth ball bearings 1235 may be configured to assist the sliding movement of the third lens barrel 1230 in the optical axis direction (Z axis direction) when a driving force is generated, so that the third lens barrel 1230 moves in the optical axis (Z axis) direction.

[0182] A plurality of guide grooves 1234 and 1015 accommodating the fifth ball support 1235 may be formed on the lower surface of the third lens barrel 1230 and the bottom surface of the housing 1010, and some of the guide grooves 1234 and 1015 may be elongated in the optical axis (Z-axis) direction.

[0183] A plurality of fifth ball bearings 1235 may be received in the guide grooves 1234 and 1015 and may be inserted to fit between the third lens barrel 1230 and the housing 1010 .

[0184] Each of the plurality of guide grooves 1234 and 1015 may be elongated in the optical axis (Z axis) direction. In addition, the cross-sections of the guide grooves 1234 and 1015 may have various shapes, such as a circular shape, a polygonal shape, and the like.

[0185] In this case, the third lens barrel 1230 may be pressed toward the bottom surface of the housing 1010 so that the fifth ball bearing 1235 may maintain contact with the third lens barrel 1230 and the housing 1010 .

[0186] To this end, a pulling yoke 1018 may be mounted on the bottom surface of the housing 1010 to face the pulling magnet 1236 mounted on the third lens barrel 1230. The pulling yoke 1018 may be made of a magnetic material. The pulling magnet may be mounted on the bottom surface of the housing 1010, and the pulling yoke may be mounted on the lower surface of the third lens barrel 1230.

[0187] The guide grooves 1013, 1014, and 1015 provided in the housing 1010 to guide the movement of the third ball bearing 1215, the fourth ball bearing 1225, and the fifth ball bearing 1235 can each have a long groove shape extending in the optical axis direction, or can be guide grooves in which at least two guide grooves can be interconnected. In the case where at least two of the guide grooves 1013, 1014, and 1015 can be interconnected guide grooves, the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 can be easily aligned in the optical axis direction.

[0188] An example may be shown in which the guide grooves 1013 and 1014 provided in the movement paths of the first lens barrel 1210 and the second lens barrel 1220 may be provided as a single guide groove, in which the guide grooves 1013 and 1014 may be connected to each other, and the third lens barrel 1230 may be provided separately. Although not limited thereto, the guide grooves may be provided in a form in which only the guide grooves 1014 and 1015 for moving the second lens barrel 1220 and the third lens barrel 1230 may be connected to each other, or in which all the guide grooves 1013, 1014, and 1015 may be connected.

[0189] At least some of the guide grooves 1214, 1224, and 1234 of the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 may protrude toward the bottom of the housing 1010 on both sides of the optical axis. Therefore, separation prevention protrusions 1213, 1223, and 1233 may be provided to prevent separation of the ball bearings 1215, 1225, and 1235. The separation prevention protrusions 1213, 1223, and 1233 may be provided to correspond to the shapes of the guide grooves 1013, 1014, and 1015 provided in the housing 1010. When the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 move in the optical axis direction, the separation prevention protrusions 1213, 1223, and 1233 may be provided to have a space that does not contact the bottoms of the guide grooves 1013, 1014, and 1015.

[0190] The separation prevention protrusions are not limited to those provided in the first lens barrel 1210 , the second lens barrel 1220 , and the third lens barrel 1230 , and may be provided in the housing 1010 in the same principle.

[0191] In addition, reference Figure 13AIn a housing 1010 according to another example of the present disclosure, a first lens barrel 1210 and a second lens barrel 1220 can be moved through different guide grooves 1013a, 1013b, 1014a, and 1014b, respectively. For example, the housing 1010 may include four first guide grooves 1013a and 1013b and four second guide grooves 1014a and 1014b, respectively, and the first lens barrel 1210 may be supported by a third ball bearing 1215 fitted to the first guide grooves 1013a and 1013b, and the second lens barrel 1220 may be supported by a fourth ball bearing 1225 fitted to the second guide grooves 1014a and 1014b.

[0192] In this case, since the first lens barrel 1210 and the second lens barrel 1220 can be slightly staggered in a direction perpendicular to the optical axis, each of the extensions 1219 and 1229 can move fully in the optical axis direction without interference. Therefore, the zoom performance can be further improved.

[0193] According to this example, the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 can be arranged sequentially in the optical axis direction, and the first lens barrel 1210 and the second lens barrel 1220 can be provided with coils 1241b and 1243b and magnets 1241a and 1243a, respectively. In addition, as shown, the third lens barrel 1230 can be provided with a coil 1245b and a magnet 1245a on one side thereof. The magnets 1241a, 1243a, and 1245a arranged in the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 can be arranged alternately on one side and the other side in a zigzag manner to minimize mutual electromagnetic effects.

[0194] Since the first lens barrel 1210 and the second lens barrel 1220 according to this example can move in the optical axis direction to achieve zooming or autofocusing in a space separated by one or more protruding walls 1009, they may contact each other. In this case, the optical axis direction position cannot be accurately controlled due to damage or excessive stroke.

[0195] Therefore, in this example, a stopper 1060 may be provided to separately control the movement of the first lens barrel 1210 and the second lens barrel 1220. The stopper 1060 may include a first stopper 1061 that limits the moving distance of the first lens barrel 1210, and a second stopper 1062 that limits the moving distance of the second lens barrel 1220. The first stopper 1061 and the second stopper 1062 may be provided separately, or may be interconnected structures.

[0196] The stopper 1060 may include a first stopper 1061 and a second stopper 1062. A first frame 1061a and a second frame 1062a, which will be described below, may be integrally connected or may be separately provided. The first frame 1061a and the second frame 1062a may have buffer materials 1061d and 1062d in portions facing the first lens barrel 1210 and the second lens barrel 1220 to absorb the impact of the first lens barrel 1210 and the second lens barrel 1220 moving upward.

[0197] The first stopper 1061 may include a first frame 1061a, a first extension 1061b extending from the first frame 1061a in a direction perpendicular to the optical axis, and a first buffer material 1061c disposed within the first extension 1061b. The first buffer material 1061c may be fitted into a hole disposed in the first extension 1061b so as to protrude from both sides of the first extension 1061b, or may be secured to both sides of the first extension 1061b by bonding with an adhesive. The first frame 1061a may be mounted to the sidewall and wall at the other end of the housing 1010 to cover the upper portion of the first lens barrel 1210 in which the extension 1219 is disposed. The first extension 1061b and the first buffer material 1061c may be mounted between one side of the second lens barrel 1220 and the protruding wall 1009. For example, the housing 1010 may be provided with an insertion groove 1011, into which the first frame 1061a and the first extension portion 1061b are assembled. The insertion groove 1011 may include a first insertion groove 1011a provided along the inner side of the upper edge of the housing 1010, and a second insertion groove 1011b extending downwardly from one end of the first insertion groove 1011a perpendicular to the optical axis. The first frame 1061a may be mounted on the first insertion groove 1011a, and the first extension portion 1061b may be assembled to the second insertion groove 1011b. Of course, the first frame 1061a may also be fixed to the housing 1010 by bonding with an adhesive.

[0198] Since the first extension portion 1061b and the first buffer material 1061c extend from the upper portion to the lower portion of the extension portion 1229 of the second lens barrel 1220, a second space portion 1221 can be provided in the upper portion of the extension portion 1229 of the second lens barrel 1220 for ensuring space, and the second space portion 1221 can be a space ensured to allow the first extension portion 1061b and the first buffer material 1061c to extend.

[0199] Therefore, the first lens barrel 1210 can be controlled to move only between the other end of the housing 1010 and the first buffer material 1061 c fitted to the rear portion of the protruding wall 1009 .

[0200] The second stopper 1062 may include a second frame 1062a, a second extension 1062b extending from the second frame 1062a in a direction perpendicular to the optical axis, and a second buffer material 1062c disposed within the second extension 1062b. The second buffer material 1062c may be fitted into a hole provided in the second extension 1062b, protruding from both sides of the second extension 1062b, or may be secured to both sides of the second extension 1062b by adhesive bonding. The second frame 1062a may be mounted on the upper portion of the housing 1010 and the protruding wall 1009 to cover the upper portion of the side of the second lens barrel 1220 where the extension 1229 is provided. The second extension 1062b and the second buffer material 1062c may be mounted between the other side of the first lens barrel 1210 and the other inner wall of the housing 1010. For example, the housing 1010 may be provided with an insertion groove 1012 into which the second frame 1062a and the second extension portion 1062b are fitted. The insertion groove 1012 may include a first insertion groove 1012a provided along the inner side of the upper edge of the housing 1010, and a second insertion groove 1012b extending downward from one end of the first insertion groove 1012a in a direction perpendicular to the optical axis. The second frame 1062a may be mounted on the first insertion groove 1012a, and the second extension portion 1062b may be fitted into the second insertion groove 1012b. Of course, the second frame 1062a may also be fixed to the housing 1010 by bonding with an adhesive.

[0201] Since the second extension portion 1062b and the second buffer material 1062c extend downward from the upper portion of the extension portion 1219 of the first lens barrel 1210, a first space portion 1211 can be provided in the upper portion of the extension portion 1219 of the first lens barrel 1210 for ensuring space, and the first space portion 1211 can be a space ensured to allow the second extension portion 1062b and the second buffer material 1062c to extend.

[0202] Therefore, the second lens barrel 1220 can be controlled to move only between the protruding wall 1009 and the second buffer material 1062 c fitted to the front portion of the other end of the housing 1010 .

[0203] refer to Figure 14 , showing a mechanism for guiding the third lens barrel 1230 to be fixed to a position of the housing 1010.

[0204] For example, the housing 1010 of the camera module 1000 may be provided with a buffer 1050 for buffering the rotation of the holder 1120, and a buffer material 1053 may be provided in an extension portion 1052 of the buffer 1050 to protrude in both directions of the optical axis. A protruding wall 1009 may be included that protrudes into the internal space and separates the space in which the first lens barrel 1210 and the second lens barrel 1220 are provided and the space in which the third lens barrel 1230 is provided.

[0205] Therefore, the third lens barrel 1230 can be assembled to the housing 1010 so that the protruding wall 1009 serves as an assembly reference surface and one side is supported by the buffer material 1053. Since the buffer material 1053 has elastic force, the third lens barrel 1230 can be assembled between the buffer material 1053 and the protruding wall 1009 in a slightly concave manner. Alternatively, the third lens barrel 1230 can be assembled to the housing 1010 first, and then the buffer material 1053 of the buffer member 1050 can be inserted to press the third lens barrel 1230. An adhesive can be injected between the third lens barrel 1230 and the side wall or bottom of the housing 1010 so that they are bonded to each other.

[0206] refer to Figure 15 and Figure 16 , shows another example of a mechanism in which one of the zoom lenses according to the example is accurately fixed in a predetermined position.

[0207] In this example, since the third lens barrel 1230 is fixed to the housing 1010, in principle, a bearing required to move the third lens barrel 1230 may not be required. This example discloses a mechanism in which a ball member is used to accurately position the third lens barrel 1230 in a predetermined position in the housing 1010. After the third lens barrel 1230 is set in the housing 1010, an adhesive can be injected between the third lens barrel 1230 and the side wall or bottom of the housing 1010 so that they can be bonded to each other.

[0208] First, refer to Figure 15 , the third lens barrel 1230 may be installed with at least three ball members 1235 between the third lens barrel 1230 and the bottom of the housing 1010. Guide grooves 1234 and 1015 into which the ball members are inserted may be provided in portions of the third lens barrel 1230 and the housing 1010 facing each other, and these guide grooves may be provided individually for each ball member.

[0209] The pair of guide grooves 1234 and 1015 provided in the third lens barrel 1230 and the housing 1010, into which the ball members 1235 are respectively inserted, can be provided with the same shape as each other (the ball members can be in point contact with the third lens barrel 1230 and the guide grooves of the housing 1010), and the three guide grooves provided in the third lens barrel 1230 or the housing 1010 can be provided as Figure 15 First, ① may be a guide groove formed by cutting all corners of a triangular pyramid shape, which may allow the ball member 1235 to contact only three surfaces of the drawing point and may constrain the third lens barrel 1230 in the optical axis (Z-axis) direction, the X-axis direction perpendicular to the optical axis direction, and the Y-axis direction perpendicular to the optical axis direction and the X-axis direction, ② may be a guide groove that appears to have a "V"-shaped groove (in this case, its bottom may be cut), which is elongated in the optical axis direction, which may allow the ball member 1235 to contact only two surfaces of the drawing point and may constrain the third lens barrel 1230 in the X-axis direction and the Y-axis direction, and ③ may be a guide groove in the optical axis direction with a long and flat bottom, which may allow the ball member 1235 to contact only one surface of the drawing point and may constrain the third lens barrel 1230 in the Y-axis direction. Therefore, since the X-axis direction, Y-axis direction and Z-axis direction of the third lens barrel 1230 can be constrained by the conditions of ①, ② and ③, the third lens barrel 1230 can be inserted into the housing 1010 by simply placing the ball member 1235 for inserting the third lens barrel 1230 into the guide grooves 1234 and 1015 to accurately position the third lens barrel 1230.

[0210] Next, refer to Figure 16 , the third lens barrel 1230 may be installed with at least three ball members 1235 between the third lens barrel 1230 and the bottom of the housing 1010. Guide grooves 1234 and 1015 into which the ball members are inserted may be provided at portions of the third lens barrel 1230 and the housing 1010 facing each other, and these guide grooves 1234 and 1015 may be provided individually for each ball member.

[0211] The pair of guide grooves 1234 and 1015 provided in the third lens barrel 1230 and the housing 1010, into which the ball members 1235 are respectively inserted, may be configured differently from each other, and the other two pairs may be configured in the same shape. For example, among the following three pairs of guide grooves, ① may be a guide groove having a pair of sidewall protrusions P, one side of which should be protruding and the other side of which should be inserted, so that the guide grooves have different shapes.

[0212] The three guide grooves respectively provided in the third lens barrel 1230 or the housing 1010 may be provided as Figure 16 First, ① may have a shape in which one of the third lens barrel 1230 or the housing 1010 includes a V-shaped groove (in this case, the bottom thereof may be cut) and sidewall protrusions P protruding from both sides, which may allow the ball member 1235 to contact the four surfaces of the plotted point on one of the guide grooves and only contact the two side walls of the V-shaped groove on the other guide groove, thereby constraining the third lens barrel 1230 in the optical axis (Z-axis) direction, the X-axis direction perpendicular to the optical axis direction, and the Y-axis direction perpendicular to the optical axis direction and the X-axis direction. ② may be a guide groove that appears to be long in the optical axis direction and has a "V"-shaped groove (in this case, its bottom may be cut), which may allow the ball member 1235 to contact only two surfaces of the plotted point and may constrain the third lens barrel 1230 in the X-axis direction and the Y-axis direction, and ③ may be a guide groove in the optical axis direction with a long and flat bottom, which may allow the ball member 1235 to contact only one surface of the plotted point and may constrain the third lens barrel 1230 in the Y-axis direction. Therefore, since the X-axis direction, Y-axis direction, and Z-axis direction of the third lens barrel 1230 can be constrained by the conditions of ①, ②, and ③, the third lens barrel 1230 can be inserted into the housing 1010 by simply placing the ball member 1235 for inserting the third lens barrel 1230 into the guide grooves 1234 and 1015 to accurately position the third lens barrel 1230.

[0213] Figures 17A to 21B is a view illustrating a positional relationship between a magnet and four hall sensors provided in a lens barrel according to an example, and is a graph illustrating sensing values ​​of the four hall sensors according to movement of the lens barrel in the positional relationship. Figures 17A to 21B Included are graphs showing individual sensing values ​​and the sum of all sensing values ​​of the Hall sensors according to the movement of the optical axis of the lens barrel depending on the arrangement of the Hall sensors in various examples, wherein the Hall sensors are disposed facing the lens barrel (e.g., the first lens barrel or the second lens barrel) that moves in the optical axis (Z-axis) direction

[0214] First, refer to Figure 17A , a lens barrel that moves in the optical axis (Z-axis) direction, for example, the first lens barrel 1210 or the second lens barrel 1220, can move a considerable distance in the optical axis direction to perform a zoom function or an autofocus function, and the position according to the distance movement can be sensed as accurately as possible using the Hall sensor 1241c or 1243c.

[0215] Therefore, in this example, a plurality of position detection sensors, for example, the Hall sensor 1241c or 1243c, are provided to face the magnet 1241a or 1243a provided in the first lens barrel 1210 or the second lens barrel 1220. More specifically, a group including four position detection sensors (for example, the Hall sensor 1241c or 1243c) may be provided.

[0216] In this example, the magnet may be a magnet for driving the lens barrel, or may be provided separately from the lens barrel for position sensing regardless of driving. Hereinafter, even in a position sensing structure of a lens barrel according to another example, the magnet may be a magnet for driving the lens barrel, or may be provided separately from the lens barrel for position sensing regardless of driving.

[0217] In this example, magnet 1241a or 1243a can be arranged to have an N pole and an S pole in a direction parallel to the optical axis (which is the direction of movement of first lens barrel 1210 or second lens barrel 1220). For example, magnet 1241a or 1243a can be a two-pole magnet magnetized to have an N pole and an S pole in the direction of the optical axis (in this case, a "neutral region" can exist between the N pole and the S pole). Alternatively, magnet 1241a or 1243a can be magnetized to have one magnetic pole, respectively, so that two magnets with an N pole and an S pole can be arranged sequentially on the surface facing coil 1241b or 1243b in the direction of the optical axis (in this case, the N pole and the S pole can be in close contact, or can be spaced apart to have a "space" between the N pole and the S pole). In all examples, the term "space region" can also be used as a term that includes both "neutral region" and "space."

[0218] The magnet 1241a or 1243a may be disposed to face the coil 1241b or 1243b.

[0219] In this case, in a non-driven state in which power is not applied to the coil 1241b or 1243b, Hall sensors (Hall 1, Hall 2, Hall 3, and Hall 4) 1241c or 1243c facing the north and south poles of the magnet 1241a or 1243a, respectively, may be provided, and the four Hall sensors may be arranged side by side in the direction of movement of the magnet 1241a or 1243a within the coiled portion of the coil 1241b or 1243b. The four Hall sensors may be spaced the same distance apart, or the Hall sensors (Hall 1 to Hall 4) arranged on the north and south poles of the magnet relative to the neutral region of the magnet may be symmetrically provided.

[0220] In this way, when the magnet 1241a or 1243a and the four Hall sensors 1241c or 1243c are arranged and the magnet 1241a or 1243a moves in two directions (+ or - direction) at the corresponding position, the four Hall sensors (Hall 1 to Hall 4) can have corresponding sensing values ​​according to the position of the magnet, as shown in FIG. Figure 17B As shown. In addition, it can be seen that when these values ​​are summed (Hall 1 + Hall 2 + Hall 3 + Hall 4), the total Hall sensing value (Hall signal) can increase or decrease roughly proportional to the movement of the magnet. In addition, the total Hall sensing value added within the movement range of the magnet can have different values. For example, it can be seen that Figure 17B The value of the "Hall Signal" in has different values ​​in the range of -2mm to 2mm.

[0221] Therefore, it may be difficult to sense the position of a magnet based on movement over relatively long distances using one or a relatively small number of Hall sensors, but it can be seen that when multiple (e.g., four) Hall sensors are used, the position can be sensed more accurately even though the magnet may travel a relatively long distance.

[0222] refer to Figure 18A and Figure 19A , showing that in Figure 17A Other examples in which only the number of Hall sensors is changed in the positional relationship shown. Figure 18B and Figure 19B , it can be seen that the sensing signal (Hall signal) (wherein the signal of the Hall sensor is sensed and the value is thus summed) can increase or decrease approximately in proportion to the movement of the magnet.

[0223] In this case, in a non-driven state where no power is applied to the coil 1241b or 1243b, the magnet 1241a or 1243a and the coil 1241b or 1243b can face each other in a direction facing their respective centers, and the magnet 1241a or 1243a can be set to have substantially the same distance between the N pole and the S pole in the direction of the optical axis.

[0224] exist Figure 18A and Figure 19A In other examples, the Hall sensor 1241c or 1243c may be provided inside the coil 1241b or 1243b, and the number of the Hall sensors may be different from Figure 17A Number of Hall sensors shown.

[0225] For example, a plurality of position detection sensors (Hall sensors) 1241c or 1243c may be provided so as to face the magnet 1241a or 1243a provided in a lens barrel (e.g., the first lens barrel 1210 or the second lens barrel 1220) that can move in the optical axis direction. For example, a set of three position detection sensors ( Figure 18A ) or five position detection sensors ( Figure 19A ) is a position detection sensor 1241c or 1243c composed of a coil 1241b or 1243b. In another example, the magnet 1241a or 1243a can be arranged to have an N pole and an S pole in a direction parallel to the optical axis (which is the moving direction of the first lens barrel 1210 or the second lens barrel 1220). For example, the magnet 1241a or 1243a can be a two-pole magnet magnetized to have an N pole and an S pole in the optical axis direction (in this case, a "neutral region" can be present between the N pole and the S pole). Alternatively, the magnet 1241a or 1243a can be magnetized to have one magnetic pole, respectively, so that the two magnets with an N pole and an S pole can be arranged in sequence on the surface facing the coil 1241b or 1243b in the optical axis direction (in this case, the N pole and the S pole can be in close contact, or can be spaced apart to have a "gap" between the N pole and the S pole).

[0226] The magnet 1241a or 1243a may face one coil 1241b or 1243b. In this case, position detection sensors (Hall sensors) may be provided facing the N pole, S pole, and neutral region (or "gap") of the magnet 1241a or 1243a, respectively.

[0227] For example, Figure 18A The example shown may include three position detection sensors (Hall sensors, Hall 1 to Hall 3) 1241c or 1243c, and the three Hall sensors may be arranged side by side in the direction of movement of the magnet 1241a or 1243a inside the coiled portion of the coil 1241b or 1243b. The three Hall sensors may be spaced apart at the same distance. Optionally, the Hall sensors (Hall 1 to Hall 3) may be arranged to face the N pole, neutral region (or "gap"), and S pole of the magnet, respectively.

[0228] Figure 19AThe example shown in can include five position detection sensors (Hall sensors, Hall 1 to Hall 5) 1241c or 1243c, and the five Hall sensors can be arranged side by side inside the coiled portion of the coil 1241b or 1243b in the moving direction of the magnet 1241a or 1243a. The five Hall sensors can be spaced apart at the same distance. For example, in a non-driving state where no power is applied to the coil 1241b or 1243b, the Hall sensors (Hall 1 to Hall 5) can be set to face the N pole, the neutral area (or "gap") and the S pole of the magnet, respectively. For example, two Hall sensors facing the N pole (Hall 1 and Hall 2), one Hall sensor facing the neutral area (or "gap") (Hall 3), and two Hall sensors facing the S pole (Hall 4 and Hall 5) can be set.

[0229] In this way, when the magnet 1241a or 1243a and three or five Hall sensors 1241c or 1243c are arranged and the magnet 1241a or 1243a moves in two directions (+ or - directions) at the corresponding position, the three or five Hall sensors can have corresponding sensing values ​​according to the position of the magnet, such as Figure 18B (three Hall sensors) or Figure 19B (Five Hall sensors) are shown. It can be seen that when these values ​​are summed (Hall 1 + Hall 2 + Hall 3, or Hall 1 + Hall 2 + Hall 3 + Hall 4 + Hall 5), the total Hall sensing value (Hall signal) can increase or decrease roughly in proportion to the movement of the magnet.

[0230] The total Hall sensing value accumulated within the moving range of the magnet can have different values. For example, it can be seen that Figure 18B and Figure 19B The value of the "Hall Signal" in has different values ​​in the range of -2mm to 2mm.

[0231] Therefore, it may be difficult to sense the position of a magnet according to a relatively long distance movement using one Hall sensor, but it can be seen that when an even number of Hall sensors (e.g. Figure 17A ) or an odd number (e.g. Figure 18A and Figure 19A ) When two or more Hall sensors are used, the position can be sensed more accurately even though the magnet can travel a relatively long distance. In this case, in a non-driven state where no power is applied to the coil 1241b or 1243b, the magnet 1241a or 1243a and the coil 1241b or 1243b can face each other in a direction facing their respective centers, and the magnet 1241a or 1243a can be arranged so that the distance between the north pole and the south pole is substantially the same in the optical axis direction.

[0232] Next, refer to Figure 20A or Figure 21A , a lens barrel that moves in the optical axis direction (for example, the first lens barrel 1210 or the second lens barrel 1220) can move a considerable distance in the optical axis direction to perform a zoom function or an autofocus function, and the position detection sensor (Hall sensor) 1241c or 1243c can be used to sense the position according to the distance movement as accurately as possible.

[0233] Therefore, in this example, a plurality of Hall sensors 1241 c or 1243 c , for example, a Hall sensor consisting of four or six Hall sensors as a group, is provided to face the magnet 1241 a or 1243 a provided in the first lens barrel 1210 or the second lens barrel 1220 .

[0234] The magnet in this example may be a magnet for driving the lens barrel, or may be provided separately from the lens barrel for position sensing.

[0235] In this example, the magnet 1241a or 1243a can be configured to have north and south poles alternately arranged in a direction parallel to the optical axis (which is the direction of movement of the first lens barrel 1210 or the second lens barrel 1220). For example, the magnet can be configured to have at least three magnetic poles (north pole, south pole, and north pole) or to have magnetic poles (south pole, north pole, and south pole) in the direction of the optical axis. For example, the magnet 1241a or 1243a can be a three-pole magnet magnetized to have at least three polarities (including north and south poles) in the direction of the optical axis (in this case, a "neutral region" can exist between the north and south poles). Optionally, magnet 1241a or 1243a can be magnetized to have one magnetic pole respectively, so that at least three magnets having N poles and S poles can be arranged sequentially in the optical axis direction on the surface facing coil 1241b or 1243b (in this case, the N pole and S pole can be in close contact, or can be spaced apart to have a "gap" between the N pole and the S pole).

[0236] The magnet 1241a or 1243a can be arranged to face the coil 1241b or 1243b, and the coil 1241b or 1243b can be arranged to be a group of two coils (for example, there can be at least two coils facing the magnet). In this case, the two coils 1241b or 1243b can be arranged to face the center of the magnetic pole magnetized to the same polarity on both sides.

[0237] Two or three Hall sensors (Hall 1 to Hall 4 or Hall 1 to Hall 6) 1241c or 1243c may be provided, which are respectively provided to face two N poles or S poles on both sides of the magnet 1241a or 1243a.

[0238] For example, Figure 20AAs shown, in a non-driven state where no power is applied to coil 1241b or 1243b, when four Hall sensors (Hall 1 to Hall 4) are set, a total of four Hall sensors can be arranged to face the magnet, and two Hall sensors are set at each of the two N poles set on both sides, wherein an S pole is inserted between the two N poles, and the two Hall sensors are respectively set at the left and right ends of the corresponding N pole.

[0239] In addition, when six Hall sensors (Hall 1 to Hall 6) are provided, as shown in FIG. Figure 21A As shown, three Hall sensors are provided at each of the two N poles provided on both sides, and an S pole is inserted between the two N poles, wherein the three Hall sensors are respectively provided at the left end, center and right end of the corresponding N pole, that is, three Hall sensors are provided for each pole, and a total of six Hall sensors can be arranged.

[0240] The Hall sensors (Hall 1 to Hall 4 or Hall 1 to Hall 6) 1241c or 1243c may be arranged in groups of the same polarity at different positions facing the magnet 1241a or 1243a at equal intervals. Figure 20A or Figure 21A As shown, the arrangement of the Hall sensors provided inside the coils 1241b or 1243b on the left and right sides may be substantially the same.

[0241] In this way, when the magnet 1241a or 1243a and four or six Hall sensors 1241c or 1243c are arranged and the magnet 1241a or 1243a moves in two directions (+ or - directions) at the corresponding position, the four or six Hall sensors can have corresponding sensing values ​​according to the position of the magnet, such as Figure 20B or Figure 21B As shown. In addition, it can be seen that when these values ​​are partially summed and subtracted, for example, the sum of the sensing values ​​of all Hall sensors facing the other polarity of the magnet 1241a or 1243a is subtracted from the sum of the sensing values ​​of all Hall sensors facing either polarity of the magnet 1241a or 1243a, for example, {(Hall 1 + Hall 2) - (Hall 3 + Hall 4), or (Hall 1 + Hall 2 + Hall 3) - (Hall 4 + Hall 5 + Hall 6)), the total Hall sensing value (Hall signal) can increase or decrease roughly in proportion to the movement of the magnet. In addition, the total Hall sensing value summed within the moving range of the magnet can have different values. For example, it can be seen that Figure 20B and Figure 21B The value of the "Hall Signal" in has different values ​​in the range of -2 to 2 mm.

[0242] Therefore, it may be difficult to sense the position of the magnet based on a relatively long distance movement using one Hall sensor, but it can be seen that when four or six Hall sensors are used, the position can be sensed more accurately even though the magnet may travel a relatively long distance. Of course, the number of Hall sensors is not limited to this, and it is applicable when two or more Hall sensors are arranged separately to face the same polarity on both sides of a three-pole magnet. In this case, in a non-driven state in which no power is applied to the coil 1241b or 1243b, the magnet 1241a or 1243a and the coil 1241b or 1243b can face each other in a direction facing their respective centers, and the magnet 1241a or 1243a can be arranged so that the distance between at least two N poles (or S poles) facing the Hall sensor in the optical axis direction is substantially the same.

[0243] Figure 22 is a perspective view of a main board according to an example, with coils and components mounted thereon.

[0244] refer to Figure 22 According to an example, the coils 1141b, 1143b, and 1145b of the first driving portion 1140 for driving the reflection module 1100 and the plurality of coils 1241b, 1243b, and 1245b of the second driving portion 1240 for driving the lens module 1200 may be mounted on the inner surface of the mainboard 1070. In addition, components 1178 such as passive components, active components, and the like, a gyro sensor 1079, and the like may be mounted on the outer surface of the mainboard 1070. Therefore, the mainboard 1070 may be double-sided.

[0245] Specifically, the main board 1070 may include a first side plate 1071 and a second side plate 1072 disposed substantially parallel to each other, and a bottom plate 1073 connecting the first side plate 1071 and the second side plate 1072. A terminal portion 1074 for external power and signal connection may be connected to any one of the first side plate 1071, the second side plate 1072, and the bottom plate 1073.

[0246] Some of the multiple coils (for example, the coil 1143b shown) and the sensor 1143c of the first driving part 1140 for driving the reflection module 1100, and some of the multiple coils (for example, the coils 1241b and 1245b shown) and the sensors 1241c and 1245c of the second driving part 1240 for driving the lens module 1200 can be mounted on the first side panel 1071.

[0247] Some of the multiple coils of the first driving part 1140 for driving the reflection module 1100 (for example, the coil 1145b shown), some of the multiple coils of the second driving part 1240 for driving the lens module 1200 (for example, the coil 1243b shown), and the sensor 1243c can be mounted on the second side panel 1072.

[0248] A coil 1141 b of the first driving part 1140 for driving the reflection module 1100 and a sensor 1141 c for sensing a position of the reflection module 1100 may be mounted on the bottom plate 1073 .

[0249] Although the first side plate 1071 is shown in the drawings as having components 1178 such as various passive elements and active elements, a gyro sensor 1079, etc. mounted thereon, the components 1178, the gyro sensor 1079, etc. may be mounted on the second side plate 1072, or may be appropriately separated and mounted on the first side plate 1071 and the second side plate 1072.

[0250] In addition, multiple coils 1141b, 1143b, 1145b, 1241b, 1243b and 1245b and position detection sensors 1141c, 1143c, 1241c, 1243c and 1245c that can be installed on the first side plate 1071, the second side plate 1072 and the bottom plate 1073 can be separated and installed differently on each plate according to the design of the camera module.

[0251] Figure 23 is a perspective view of a portable electronic device according to another example.

[0252] refer to Figure 23 The portable electronic device 2 may be a portable electronic device equipped with a plurality of camera modules 500 and 1000, such as a mobile communication terminal, a smart phone, a tablet PC, etc.

[0253] A plurality of camera modules 500 and 1000 may be installed in the portable electronic device 2 .

[0254] At least one of the plurality of camera modules 500 and 1000 may be a Figures 2 to 16 Various examples of the camera module 1000 are described.

[0255] For example, in the case of a portable electronic device including a dual camera module, at least one of the two camera modules may be provided as the camera module 1000 according to various examples.

[0256] Through this example, a camera module and a portable electronic device including the same can have a simple structure and a reduced size while implementing functions such as an AF function, a zoom function, an OIS function, etc. In addition, power consumption can be minimized.

[0257] The camera module may have a simple structure and a reduced size while implementing functions such as an AF function, a zoom function, an OIS function, etc.

[0258] Furthermore, various examples allow easy alignment in the optical axis direction even when a plurality of lens groups are provided.

[0259] Furthermore, a stopper or a buffer may be provided so that neither the zoom lens nor the reflection module is separated from the optimal position.

[0260] Furthermore, in order to maximize the performance of the zoom lens, the movement position of the zoom lens can be accurately measured by multiple Hall sensors.

[0261] Although this disclosure includes specific examples, it will be apparent to those skilled in the art that various changes in form and detail can be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered in a descriptive sense only and not for purposes of limitation. The description of features or aspects in each example is considered to be applicable to similar features or aspects in other examples. Suitable results can also be obtained if the described techniques are performed in a different order, and / or if the components in the described systems, architectures, devices or circuits are combined in a different manner, and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of the disclosure is not limited by the specific embodiments, but by the claims and their equivalents, and all changes within the scope of the claims and their equivalents are to be construed as included in the disclosure.

Claims

1. Camera module, including: case; a lens module, disposed in the housing and movable in the optical axis direction; a reflection module, disposed in front of the lens module and rotatable relative to the housing; a driving part comprising a magnet provided on the lens module and a coil provided to face the magnet in a first axis direction perpendicular to the optical axis direction; as well as A plurality of ball bearings are provided between the lens module and the housing, Wherein, a pulling magnet is provided on the lens module, and a pulling yoke is provided on the housing. wherein the pulling magnet and the pulling yoke face each other in a second axis direction perpendicular to both the optical axis direction and the first axis direction, wherein the plurality of ball bearings include three ball bearings, Two of the three ball bearings are disposed between one side of the lens module and the housing. The remaining one of the three ball bearings is disposed between the other side of the lens module and the housing, and The pulling magnet is arranged closer to the two ball bearings than to the one ball bearing.

2. The camera module according to claim 1, wherein: The two ball bearings of the three ball bearings are provided on one side of the lens module based on the optical axis of the lens module, and The remaining one of the three ball bearings is disposed on the other side of the lens module based on the optical axis of the lens module.

3. The camera module according to claim 2, wherein: The two ball bearings are spaced apart in the optical axis direction.

4. The camera module according to claim 3, wherein: A plurality of guide grooves are respectively provided on the bottom surface of the lens module and the inner surface of the housing, The bottom surface of the lens module and the inner surface of the housing face each other in the second axis direction, and The plurality of ball bearings are disposed in the plurality of guide grooves.

5. The camera module according to claim 4, wherein: The lens module includes an extending portion that protrudes and extends further than other portions of the lens module in the optical axis direction, and At least some of the plurality of guide grooves are provided on the extending portion.

6. The camera module according to claim 1, wherein: The pulling magnet is provided on a bottom surface of the lens module facing the housing in the second axis direction.

7. The camera module according to claim 6, wherein: The lens module includes one side surface and another side surface connected to the bottom surface, and The pulling magnet is disposed closer to the one side surface than to the other side surface.

8. The camera module according to claim 7, wherein: The magnet is provided on the one side surface of the lens module.

9. The camera module according to claim 8, wherein: The plurality of ball bearings is three in number, and The two ball bearings of the plurality of ball bearings are disposed in a space between the pulling magnet and the magnet.

10. The camera module according to claim 1, wherein The magnet is positioned closer to the two ball bearings than to the one ball bearing.

11. The camera module according to claim 1, wherein: The magnet is provided on one side surface of the lens module, The housing has a through hole, and The magnet and the coil directly face each other through the through-hole.

12. The camera module according to claim 11, wherein: The magnet has an N pole, a neutral region, and an S pole along the optical axis.

13. The camera module according to claim 11, wherein: A position sensor is disposed within the coil.

14. The camera module according to claim 11, further comprising a plurality of magnets provided on the reflection module and a plurality of coils facing the plurality of magnets, in, The housing further comprises a plurality of through holes, and The plurality of magnets and the plurality of coils directly face each other through the plurality of through holes.

15. The camera module according to claim 14, wherein: One of the plurality of magnets is disposed on a bottom surface of the reflection module, and Two magnets among the plurality of magnets are disposed on one side surface and another side surface of the reflection module.

16. The camera module according to claim 14, wherein: A position sensor is disposed within the plurality of coils.

17. The camera module according to claim 14, wherein: The mainboard is arranged on the housing, and The coil and the plurality of coils are disposed on the main board.

18. The camera module according to claim 1, wherein: A ball bearing is provided between the reflective module and the housing.

19. The camera module according to claim 1, wherein: The elastic buffer is arranged between the reflection module and the lens module.

20. The camera module according to claim 1, wherein The lens module has one surface facing the housing in the second axis direction, A plurality of guide grooves in which the plurality of ball bearings are disposed are formed on the one surface of the lens module, The lens module includes an extending portion extending in the optical axis direction, and At least one guide groove of the plurality of guide grooves extends to the extending portion.

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