Camera module

Abstract

A camera module includes a housing, a lens barrel disposed in the housing and movable in an optical axis direction, a reflection module disposed in front of the lens barrel and rotatable with respect to the housing, a driving part including a magnet disposed on the lens barrel and a coil disposed to face the magnet in a first axis direction perpendicular to the optical axis direction, and three ball supports disposed between the lens barrel and the housing, wherein a traction magnet is disposed on the lens barrel and a traction yoke facing the traction magnet is disposed on the housing, wherein the lens barrel includes one side surface and another side surface spaced apart in the first axis direction, and the magnet is disposed on one side surface of the lens barrel, and two ball supports of the three ball supports are disposed closer to one side surface than the other side surface.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to 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, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field

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

[0004] In addition to being installed in smartphones, cameras are also commonly installed in portable electronic devices such as tablet PCs and laptops, and features such as autofocus (AF), optical image stabilization (OIS), and zoom have been added to cameras used in mobile devices.

[0005] However, the structure of the camera module has become more complex and its size has increased to enable various functions, resulting in an increase in the size of portable electronic devices in which the camera module is installed.

[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 attached to it, must be considered. This requires a certain level of driving force, thus increasing power consumption.

[0007] Furthermore, to achieve both autofocus and zoom functions, a certain distance is required to allow the lens to move along the optical axis. However, due to the slim profile of the camera module, this configuration may be difficult to implement. Summary of the Invention

[0008] This summary is provided to present a simplified version of the selection of concepts further described in the detailed embodiments below. This summary is not intended to represent key or essential features of the claimed subject matter, nor is it intended to help determine the scope of the claimed subject matter.

[0009] A camera module with a simple configuration and reduced size, while realizing functions such as autofocus (AF), zoom, and optical image stabilization (OIS).

[0010] A camera module having multiple lens groups that can be easily aligned in the optical axis direction.

[0011] The zoom lens and the reflection module are provided with a stopper or a buffer to not be separated from the optimal position.

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

[0013] In one general aspect, a camera module includes a housing, a lens module disposed in an inner space of the housing to be movable in an optical axis direction and including at least one lens therein, a magnet disposed in the lens module, and a position detection sensor 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 different from the first polarity.

[0014] The magnet can be a two-pole magnet magnetized to have an N-pole, a neutral region, and an S-pole, or can 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 can 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 a region between the N-pole and the S-pole.

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

[0018] The camera module can include a coil disposed in the housing and configured to face the magnet, and the position detection sensor can be disposed 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 a movement range of the magnet.

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

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

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

[0024] The first pole of the magnet can have the same polarity as the second pole of the magnet, the magnet can include a third pole disposed between the first pole and the second pole along the optical axis direction, and the first pole and the second pole can be spaced apart from the third pole by equal distances along the optical axis direction.

[0025] The position detection sensors can include at least four position detection sensors including a first position detection sensor disposed to face a first end of the first pole along the optical axis direction, a second position detection sensor disposed to face a second end of the first pole along the optical axis direction, a third position detection sensor disposed to face a first end of the second pole along the optical axis direction, and a fourth position detection sensor disposed to face a second end of the second pole along the optical axis direction.

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

[0027] The position detection sensors can include a first group of position detection sensors spaced apart by equal intervals along the optical axis direction and disposed to face the first pole, and a second group of position detection sensors spaced apart by equal intervals along the optical axis direction and disposed to face the second pole.

[0028] The camera module can include a first coil fixed to the housing and disposed in the housing to face a first pole of the magnet, and a second coil fixed to the housing and disposed in the housing to face a second pole of the magnet. The first pole of the magnet can 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 in a direction of an optical axis within the housing, a magnet disposed in the lens module and including at least two magnetic poles alternately arranged in the direction of 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 can have the same polarity as the second pole, the magnet can include a third pole having a different polarity from the first and second poles, and the third pole can be disposed between the first and second poles in the direction of the optical axis.

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

[0032] The position detection sensor can include at least one position detection sensor disposed in a neutral region between the first and second poles in the direction of the optical axis.

[0033] Other features and aspects will become apparent from the following specific description, drawings and claims. BRIEF DESCRIPTION OF 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 reflection 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 reflection 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 on which a driving coil and a sensor are mounted according to an example, the board being coupled to a housing of a camera module.

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

[0043] Figure 8B is an exploded perspective view of a rotation plate and a rotation 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 stopper of a zoom lens and a buffer of a rotation holder mounted according to an example.

[0048] Figure 12 is an exploded perspective view in which the stopper of the zoom lens and the buffer of the rotation holder in Figure 11 are disassembled.

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

[0050] Figure 13B is a reference view showing a shape of a zoom lens in which Figure 13A is mounted.

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

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

[0054] Figure 17B is a view showing a position of a magnet in a lens barrel according to an example.Figure 17A A graph of sensed values of the four Hall sensors as a function of movement of the lens barrel in the positional relationship shown.

[0055] Figure 18A and Figure 19A is a view showing a positional relationship between the magnets and the four Hall sensors provided in the lens barrel according to another example. Figure 17A is a view showing another example of a positional relationship in which only a modified number of Hall sensors are provided.

[0056] Figure 18B and Figure 19B is a view showing a positional relationship between the magnets and the four Hall sensors provided in the lens barrel according to another example. Figure 18A and Figure 19A is a graph of sensed values of the Hall sensors as a function of movement of the lens barrel in the positional relationship shown in

[0057] Figure 20A is a view showing a positional relationship between the magnets and the four Hall sensors provided in the lens barrel according to another example.

[0058] Figure 20B is a view showing a positional relationship in which only a modified number of Hall sensors are provided. Figure 20A A graph of sensed values of the four Hall sensors as a function of movement of the lens barrel in the positional relationship shown.

[0059] Figure 21A is a view showing another example of a positional relationship in which only a modified number of Hall sensors are provided. Figure 20A

[0060] Figure 21B is a graph of sensed values of the six Hall sensors as a function of movement of the lens barrel in the positional relationship shown in Figure 21A

[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 specific embodiments, identical reference numerals designate identical elements. The drawings can not be to scale and the relative dimensions, proportions and descriptions of the elements in the drawings can be exaggerated for clarity, illustration and convenience. DETAILED DESCRIPTION

[0064] ​​The following detailed description is presented to enable any person skilled in the art to which the described methods, devices, and / or systems belong to make and use the same. Various changes, modifications, and equivalents, which follow in the spirit and scope of the described methods, devices, and / or systems, will be apparent to those skilled in the art from this detailed description. The order of the operations described herein is merely exemplary and is not limited to the order described herein, except where otherwise specifically noted. Furthermore, for the sake of brevity and clarity, descriptions of functions and constructions that are well known to those skilled in the art can be omitted.

[0065] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the described examples are provided as example so that the 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, the use of the term “may” with respect to examples or implementations that can include or implement certain features, indicates that at least one example or implementation exists that includes or implements at least those features, and that not all examples or implementations need necessarily include or implement the opposite of those features.

[0067] Throughout this specification, when an element, such as a layer, region or substrate, is referred to as being “on” or “connected to” or “coupled to” another element, it can be directly on, directly connected to, or directly coupled to the other element, or one or more intervening elements can be present. In contrast, when an element is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another element, there are no intervening elements present.

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

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

[0070] For ease of description, spatially relative terms, such as "above", "upper", "below", and "lower", can be used herein for the purpose of illustrating one element's relationship to another element within the figures. Such spatially relative terms are based on the relative positions of the elements as shown in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as being "above" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Accordingly, the term "above" encompasses both an orientation of above and below, depending on the spatial orientation of the device. The device can be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0071] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has", "having" as used herein, are specifically intended to be construed as open-ended terms i.e., the inclusion of unspecified elements, components, integers, operations, steps, or the like.

[0072] The shapes shown in the drawings can vary due to manufacturing techniques and / or tolerances. Thus, the examples described herein are not limited to the specific shapes shown in the drawings, but include variations of the shapes that occur during manufacturing.

[0073] The features of the examples described herein can be combined in various ways as will be apparent after reading the disclosure. In addition, although examples described herein have a variety of configurations, other configurations are possible in which are apparent after reading the disclosure.

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

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

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

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

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

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

[0080] The camera module 1000 according to an example can 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 can cause a problem regarding miniaturization of the portable electronic device 1 in which the camera module 1000 is installed.

[0083] For example, the camera module has an increasing number of stacked lenses for a zoom function. When a plurality of lenses are stacked in a thickness direction of the portable electronic device, the thickness of the portable electronic device can increase depending on the number of stacked lenses. Accordingly, it can not be possible to secure a sufficient number of stacked lenses without increasing the thickness of the portable electronic device, thereby deteriorating the zoom function.

[0084] Further, in order to implement the AF function, the zoom function, and the OIS function, an actuator is required to move a plurality of lens groups in an optical axis direction or a direction perpendicular thereto. When the optical axes (Z-axes) of the lens groups are formed in a thickness direction of the portable electronic device, the actuator for moving the lens groups should also be installed in the thickness direction. Accordingly, the thickness of the portable electronic device can increase.

[0085] Since the optical axes (Z-axes) of the plurality of lenses are disposed perpendicular to the thickness direction of the portable electronic device 1, the portable electronic device 1 can be manufactured to be thinner even when the camera module 1000 having the AF function, the zoom function, and the OIS function is installed.

[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] Referring to Figures 2 to 4 , the camera module 1000 can include a reflection module 1100, a lens module 1200, and an image sensor module 1300 disposed in a housing 1010.

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

[0089] For example, a path of light incident through a 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 a direction of an optical axis (Z-axis).

[0090] The lens module 1200 can include a plurality of lenses through which light whose moving direction is changed by the reflection module 1100 passes. The lens module 1200 can include at least three lens barrels 1210, 1220, and 1230. AF functionality and zoom functionality can be implemented according to movement of the at least three lens barrels 1210, 1220, and 1230 in a direction of an optical axis (Z-axis). Further, in this example, any one of the at least three lens barrels 1210, 1220, and 1230, such as the lens barrel 1230, can be fixed so that it does not move in the optical axis direction. The AF functionality and the zoom functionality can be implemented by the fixed lens barrel 1230 and the remaining two lens barrels 1210 and 1220.

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

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

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

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

[0095] For example, as shown in the drawing, the housing 1010 can be integrally disposed so that the reflection module 1100 and the lens module 1200 can be embedded in the internal space thereof. However, this configuration can not be limited thereto, and, for example, separate housings in which the reflection module 1100 and the lens module 1200 are respectively embedded can be connected to each other.

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

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

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

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

[0100] In a case where the reflection module 1100 is disposed at the front side, the rotation holder 1120 can be closely adhered to and supported on the inner wall surface of the case 1010 by an attractive force between a traction yoke 1153 disposed on the inner wall surface of the case 1010 and a traction magnet 1151 disposed on the rotation holder 1120. Although not shown in the drawings, the case 1010 can also be provided with a traction magnet, and the rotation holder 1120 can also be provided with a traction yoke. Hereinafter, for convenience of explanation, the structure shown in the drawings will be described.

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

[0102] As will be described in detail below, since the first ball support 1131 and the second ball support 1133 can be partially fitted to the guide grooves 1132, 1134, 1021, and 1121, thereby being closely adhered thereto, when the rotation holder 1120 and the rotation plate 1130 are fitted to the inner space of the case 1010, a small space can be required between the rotation holder 1120 and the protruding wall 1009. When the rotation holder 1120 is mounted on the case 1010, the rotation holder 1120 can be closely adhered to the inner wall surface of the case 1010 by the attractive force between the traction yoke 1153 and the traction 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 can be included, which can be fitted to the upper portion of the case 1010 while supporting the rotation holder 1120 (of course, even without the buffer 1050, it can be fixed by the attractive force between the traction magnet 1151 and the traction yoke 1153).

[0104] The buffer 1050 can include a frame 1051 fitted to the upper portion of the case 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 can include a buffer material 1053 to protrude toward the rotation holder 1120 in the optical axis direction. The buffer material 1053 can be disposed to be fitted into a through-hole provided in the extension portion 1052, and the buffer material 1053 can be any material as long as it is an elastic material, such as urethane, silicone, epoxy, a polymer material, etc.

[0105] The locking portion 1055 can be locked when fitted to the outside of the case 1010. The case 1010 can be provided with an insertion groove 1019 (e.g., see Figure 5), the frame 1051 and the extension portion 1052 are fitted into the insertion groove 1019. The insertion groove 1019 can include a first insertion groove 1019a disposed along the inner side of the upper edge of the housing 1010, a second insertion groove 1019b extending downward perpendicularly to the optical axis direction from the other end of the first insertion groove 1019a, and a third insertion groove 1019c disposed along the outer side of the housing 1010 at one end of the first insertion groove 1019a (see FIG. 10B, for example). Figure 12

[0106] Since the frame 1051 can be fitted into the first insertion groove 1019a, the locking portion 1055 disposed at one end of the frame 1051 can be fitted to the outside of the housing 1010, and the extension portion 1052 disposed at the other side end of the frame 1051 can be fitted into the second insertion groove 1019b, so 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 adhere to each other.

[0107] The buffer material 1053 can be disposed to be fitted into the through-hole provided in the extension portion 1052 (of course, the buffer material 1053 can be attached to one side or both sides of the extension portion 1052 by being adhered with an adhesive). The buffer material 1053 can be disposed to protrude to both sides of the extension portion 1052. The buffer material 1053 can function as a buffer for absorbing the impact of the rotation holder 1120 or a stopper for limiting the movement distance, and the third lens barrel 1230 can be fixed ( Figure 6B ) in this case. One side of the third lens barrel 1230 in the optical axis direction can be supported.

[0108] The buffer 1050 can function as a cradle supporting the rotation holder 1120 when the reflection module 1100 is not driven, and can function as a buffer or a stopper controlling the motion of the rotation holder 1120 when the reflection module 1100 is driven. A space can be provided between the buffer 1050 and the rotation holder 1120 so that the rotation holder 1120 is smoothly rotated. Alternatively, even when the buffer 1050 is in contact with the rotation holder 1120, the buffer 1050 can be formed of an elastic material to allow the rotation holder 1120 to be smoothly moved while being supported by the buffer 1050.

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

[0110] Further, since the plurality of coils 1141b, 1143b, 1145b, 1241b, 1243b, and 1245b can be disposed in the housing 1010 in a state in which they are mounted on the main board 1070, the housing 1010 can be provided with a plurality of through-holes 1010a, 1010b, 1010c, 1010d, 1010e, 1010f, and 1010g so that the plurality of coils 1141b, 1143b, 1145b, 1241b, 1243b, and 1245b can be exposed to the inner space of the housing 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 drawing. In this case, a single terminal can be provided, thereby making it easy to connect external power. The main board 1070 is not limited to this configuration, and can also be provided as a plurality of boards by separating a board on which coils for the reflection module 1100 are mounted from a board on which coils for the lens module 1200 are mounted.

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

[0113] The OIS function can be implemented through the movement of the rotation holder 1120 having a relatively low weight, since it does not include a lens or the like, and thus power consumption of the OIS function can be significantly reduced.

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

[0115] The reflection module 1100 can 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 that moves the rotation holder 1120.

[0116] The reflection member 1110 can change the moving direction of light. For example, the reflection member 1110 can be a mirror or a prism that reflects light (for convenience of explanation, the reflection member 1110 can be illustrated as a prism in the drawings).

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

[0118] The mounting surface 1122 of the rotation holder 1120 can be an inclined surface so that the path of light is changed. The mounting surface 1122 can be a surface inclined by 30° to 60° with respect to an optical axis (Z-axis) of the plurality of lenses. The inclined surface of the rotation holder 1120 can be directed toward an open portion 1031 of the cover 1030 on which light is incident.

[0119] The rotation holder 1120 on which the reflection member 1110 is mounted can be mounted to be movable in the internal space of the housing 1010. For example, the rotation holder 1120 can 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) can refer to axes perpendicular to the optical axis (Z-axis) and can be perpendicular to each other.

[0120] The rotation holder 1120 can be supported in the housing 1010 by a first ball support 1131 aligned along the first axis (X-axis) and a second ball support 1133 aligned along the second axis (Y-axis) so that the rotation holder 1120 is smoothly rotated about the first axis (X-axis) and the second axis (Y-axis). As an example, two first ball supports 1131 aligned along the first axis (X-axis) and two second ball supports 1133 aligned along the second axis (Y-axis) are illustrated in the drawings. As described below, the rotation holder 1120 can be rotated about the first axis (X-axis) and the second axis (Y-axis) by the first driving part 1140.

[0121] Further, the first ball support 1131 and the second ball support 1133 can be disposed on the front surface and the rear surface of the rotation plate 1130, respectively (or alternatively, the first ball support 1131 and the second ball support 1133 can be disposed on the rear surface and the front surface of the rotation plate 1130, respectively; 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 convenience of explanation, the structure shown in the drawing will be described below). The rotation plate 1130 can be disposed between the rotation holder 1120 and the inner surface of the housing 1010.

[0122] The rotation holder 1120 can be supported in the housing 1010 by an attractive force between the traction magnet 1151 or the traction yoke disposed on the rotation holder 1120 and the traction yoke 1153 or the traction magnet disposed on the housing 1010 through the rotation plate 1130 (the first ball support 1131 and the second ball support 1133 can also be disposed between the rotation holder 1120 and the housing 1010).

[0123] The guide grooves 1132 and 1134 can be disposed on the front surface and the rear surface of the rotation plate 1130 so that the first ball support 1131 and the second ball support 1133 are inserted, respectively. The guide grooves 1132 and 1134 can 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 can be provided with a third guide groove 1021 into which the first ball support 1131 is partially inserted, and the rotation holder 1120 can be provided with a fourth guide groove 1121 into which the second ball support 1133 is partially inserted.

[0125] The first guide groove 1132, the second guide groove 1134, the third guide groove 1021, and the fourth guide groove 1121 described above can be provided in a semispherical or polygonal (polyprism or poly 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 can 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] As Figure 8B and Figure 9BAs illustrated, the first ball support 1131a and the second ball support 1133a can be fixed to both surfaces of the rotation plate 1130, respectively.

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

[0129] Further, the first ball support 1131 and the second ball support 1133 can be separately manufactured and then attached to any one of the housing 1010, the rotation plate 1130, and the rotation holder 1120. Alternatively, the first ball support 1131 and the second ball support 1133 can be integrally disposed with the housing 1010, the rotation plate 1130, or the rotation holder 1120 when the housing 1010, the rotation plate 1130, or the rotation holder 1120 is manufactured.

[0130] The first driving part 1140 generates a driving force so that the rotation holder 1120 is rotatable about two axes.

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

[0132] When power is supplied to the plurality of coils 1141b, 1143b, and 1145b, the rotation holder 1120 on which the magnets 1141a, 1143a, and 1145a can be mounted can be rotated about a first axis (X-axis) and a second axis (Y-axis) by electromagnetic effects between the plurality of magnets 1141a, 1143a, and 1145a and the plurality of coils 1141b, 1143b, and 1145b.

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

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

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

[0136] When the rotation holder 1120 is rotated, a closed-loop control method involving sensing a position of the rotation holder 1120 and providing feedback can be used.

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

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

[0139] The main board 1070 can be provided with a gyro sensor (not shown) that senses a shaking factor such as hand shaking or other user movement, and can 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 rotation holder 1120 is rotated about the first axis (X-axis), the rotation plate 1130 can be rotated about the first ball support 1131 disposed along the first axis (X-axis), which causes the rotation holder 1120 to also rotate (in this case, the rotation holder 1120 can not move relative to the rotation plate 1130).

[0141] Further, when the rotation holder 1120 is rotated about the second axis (Y-axis), the rotation holder 1120 is rotated about the second ball support 1133 disposed along the second axis (Y-axis) (in this case, the rotation plate 1130 can not rotate, and the rotation holder 1120 can thus move relative to the rotation plate 1130).

[0142] For example, when the rotation holder 1120 rotates around the first axis (X-axis), the first ball support 1131 can work, and when the rotation holder 1120 rotates around the second axis (Y-axis), the second ball support 1133 can work. This is because, as shown in the drawing, when the rotation holder 1120 rotates around the first axis (X-axis), the second ball support 1133 aligned along the second axis (Y-axis) cannot move with the fitting into the guide grooves 1134 and 1121, and when the rotation holder 1120 rotates around the second axis (Y-axis), the first ball support 1131 aligned along the first axis (X-axis) cannot move with the fitting into the guide grooves 1021 and 1132.

[0143] Light reflected on the reflection module 1100 can 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 can be implemented on the incident light.

[0144] Reference Figure 6A The two lens barrels 1210 and 1220 at the rear side can be responsible for the zoom function, and the lens barrel 1230 at 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. Reference Figure 6B For example, the two lens barrels 1210 and 1220 at the rear side individually or collectively perform the zoom function or the AF function, in which, for example, the two lens barrels 1210 and 1220 are combined to perform the zoom function, and the last lens barrel 1210 at the rear side can also be responsible for the AF function, and the lens barrel 1230 at the front side can remain fixed to the housing 1010. In addition, although not shown in the drawing, any one of the three lens barrels 1210, 1220, and 1230 can remain fixed to the housing 1010, and the remaining two lens barrels can individually or collectively be responsible for the zoom function or the AF function. In this case, the lens barrel (for example, the lens barrel 1230) fixed to the housing 1010 does not need to be disposed of the ball support or the like between the driving magnet or the coil facing the driving magnet and the housing 1010.

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

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

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

[0149] The lens module 1200 can include at least three lens barrels, a first lens barrel 1210, a second lens barrel 1220, and a third lens barrel 1230, in an inner space of the housing 1010, and can include a second driving part 1240 that moves the three lens barrels 1210, 1220, and 1230 in an optical axis (Z-axis) direction with respect to the housing 1010.

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

[0151] In this regard, the second driving part 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 part 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 can be configured to be supported on a bottom surface of the housing 1010. For example, the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 can be individually supported by ball support members 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 can be individually supported by the ball support members on the bottom surface of the housing 1010 will be mainly described.

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

[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 the magnets 1241a, 1243a, and 1245a can be mounted, respectively, can be moved in the optical axis (Z-axis) direction by electromagnetic effects between the magnets 1241a, 1243a, and 1245a and the coils 1241b, 1243b, and 1245b.

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

[0156] A plurality of coils 1241b, 1243b, and 1245b can 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 can be disposed on two 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 can be disposed on two side walls to face the plurality of magnets 1241a, 1243a, and 1245a.

[0157] For example, the main board 1070 can 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 can be used. Accordingly, the closed-loop control can require position detection sensors 1241c, 1243c, and 1245c. The position detection sensors 1241c, 1243c, and 1245c can be Hall sensors.

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

[0160] In the drawing, 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 the magnets can be disposed on either side. The coils and the magnets can have slightly increased sizes to enhance the driving force. In this case, a plurality of position detection sensors 1241c and 1243c can be provided for accurate position sensing. In the drawing, 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 in the optical axis direction to implement zooming, and thus a sufficient number of Hall sensors should be provided to sense the correct position.

[0161] The first lens barrel 1210 can be disposed in the housing 1010 so that it can move in the optical axis (Z-axis) direction. For example, a plurality of third ball bearings 1215 can 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 that guide 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 can be configured to roll in the optical axis (Z-axis) direction when a driving force that moves the first lens barrel 1210 in the optical axis (Z-axis) direction is generated. Accordingly, 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 in which the third ball bearings 1215 are accommodated can be formed on the lower surface of the first lens barrel 1210 and the bottom surface of the housing 1010 that faces the first lens barrel 1210, and some of the guide grooves can be elongated in the optical axis (Z-axis) direction.

[0165] The plurality of third ball bearings 1215 can be accommodated in the guide grooves 1214 and 1013, 1014 and can 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 can be elongated in the optical axis (Z-axis) direction. Furthermore, the cross-sections of the guide grooves 1214 and 1013, 1014 can 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, a traction yoke 1016 (for example, see Figure 10 ) can be installed on the bottom surface of the housing 1010 to face a traction magnet 1216 (for example, see Figure 10 ) installed on the lower surface of the first lens barrel 1210. The traction yoke 1016 can be formed of a magnetic material. The traction magnet can be installed on the bottom surface of the housing 1010, and the traction yoke can be installed on the lower surface of the first lens barrel 1210.

[0168] The coil 1241b driving the first lens barrel 1210 can be disposed on one side surface of the housing 1010. In this case, an electromagnetic force is applied to one side surface of the first lens barrel 1210, and thus the traction magnet 1216 and the traction yoke 1016 can be biased from the center of the housing 1010 toward one side surface in order to facilitate driving of the first lens barrel 1210. The first lens barrel 1210 can include a main body portion 1210a and a magnet mounting portion 1210b extending in the optical axis direction to the side surface of the second lens barrel 1220 in order to increase the size of the magnet 1241a to enhance the driving force. Further, 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 portion 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 driving the second lens barrel 1220 can be disposed on the other side surface, which can be the opposite side surface of the one side surface of the housing 1010 on which the coil 1241b can be disposed. In this case, since an electromagnetic force can be applied to the other side surface of the second lens barrel 1220, the traction magnet 1226 and the traction yoke 1017 (for example, see Figure 10 ) can be biased from the center of the housing 1010 toward the other side surface in order to facilitate driving of the second lens barrel 1220.

[0170] Further, the coil 1245b driving the third lens barrel 1230 can be disposed on both side surfaces or one side surface of the housing 1010. When the coil 1245b is disposed only on one side of the housing 1010, similar to the first lens barrel 1210 and the second lens barrel 1220, the traction magnet 1236 and the traction yoke 1018 (for example, see Figure 10) can be biased from the center of the housing 1010 toward one side surface in order to drive the third lens barrel 1230. However, this refers to a case in which the coils driving the lens barrels 1210, 1220, and 1230 can be disposed on only one of the one side surface and the other side surface. When the coils are disposed on both side surfaces, the traction magnets and the traction yoke can be disposed substantially at the center of the housing 1010.

[0171] The second lens barrel 1220 can be disposed in the housing 1010 so that it can move in the optical axis (Z-axis) direction. As an example, the second lens barrel 1220 can be disposed on the front side of the first lens barrel 1210 in parallel with the first lens barrel 1210 in the optical axis direction.

[0172] A plurality of fourth ball bearings 1225 can be disposed between the second lens barrel 1220 and the bottom surface of the housing 1010, and the second lens barrel 1220 can slide with respect to the housing 1010 by the fourth ball bearings 1225.

[0173] The plurality of fourth ball bearings 1225 can be configured to assist the sliding motion of the second lens barrel 1220 in the optical axis direction (Z-axis direction) when a driving force can be generated so that the second lens barrel 1220 moves in the optical axis direction (Z-axis direction).

[0174] A plurality of guide grooves 1224 and 1013, 1014 in which the fourth ball bearings 1225 are accommodated can 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 can be elongated in the optical axis direction (Z-axis direction).

[0175] The plurality of fourth ball bearings 1225 can be accommodated in the guide grooves 1224 and 1013, 1014, and can 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 can be elongated in the optical axis direction (Z-axis direction). In addition, the cross-section of the guide grooves 1224 and 1013, 1014 can be various shapes such as a circular shape, a polygonal shape, etc.

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

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

[0179] The third lens barrel 1230 can 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 can be disposed on the front side of the second lens barrel 1220 in parallel with the second lens barrel 1220 in the optical axis direction.

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

[0181] The plurality of fifth ball bearings 1235 can be configured to assist in the sliding motion 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 in which the fifth ball bearings 1235 are accommodated can 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 can be elongated in the optical axis (Z-axis) direction.

[0183] The plurality of fifth ball bearings 1235 can be accommodated in the guide grooves 1234 and 1015, and can 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 can be elongated in the optical axis (Z-axis) direction. In addition, the guide grooves 1234 and 1015 can have various shapes in cross-section, such as a circular shape, a polygonal shape, etc.

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

[0186] To this end, a traction yoke 1018 can be mounted on the bottom surface of the housing 1010 to face a traction magnet 1236 mounted on the third lens barrel 1230. The traction yoke 1018 can be a magnetic material. The traction magnet can be mounted on the bottom surface of the housing 1010, and the traction yoke can 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, fourth, and fifth ball bearings 1215, 1225, and 1235, respectively, can each have a long slot shape extending in the optical axis direction, or can be guide grooves in which at least two of the guide grooves can be connected to each other. In the case in which at least two of the guide grooves 1013, 1014, and 1015 can be interconnected guide grooves, the first, second, and third lens barrels 1210, 1220, and 1230 can be easily aligned in the optical axis direction.

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

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

[0190] The anti-separation protrusions are not limited to those provided in the first, second, and third lens barrels 1210, 1220, and 1230, and can be provided in the housing 1010 with the same principle.

[0191] Furthermore, with reference to Figure 13AIn the case of the housing 1010 according to another example of the disclosure, the first lens barrel 1210 and the second lens barrel 1220 can be moved by different guide grooves 1013a, 1013b, 1014a, and 1014b, respectively. For example, the housing 1010 can include a total of four first guide grooves 1013a and 1013b and second guide grooves 1014a and 1014b, which are separately disposed, respectively, and the first lens barrel 1210 can be supported by a third ball support 1215 fitted to the first guide grooves 1013a and 1013b, and the second lens barrel 1220 can be supported by a fourth ball support 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 direction, each of the extension portions 1219 and 1229 can be sufficiently moved in the optical axis direction without interference. Accordingly, zoom performance can be further improved.

[0193] The first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 according to this example can be sequentially disposed in the optical axis direction, and the first lens barrel 1210 and the second lens barrel 1220 can be respectively provided with coils 1241b and 1243b and magnets 1241a and 1243a. Further, as illustrated, the third lens barrel 1230 can be provided with a coil 1245b and a magnet 1245a at one side thereof. The magnets 1241a, 1243a, and 1245a provided in the first lens barrel 1210, the second lens barrel 1220, and the third lens barrel 1230 can be alternately disposed at 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 be moved in the optical axis direction to implement zoom or autofocus in one space divided by one or more protruding walls 1009, they can come into contact with each other. In this case, the optical axis direction position cannot be precisely controlled due to damage or excessive stroke.

[0195] Accordingly, in this example, a stopper 1060 can be provided to control the movement of the first lens barrel 1210 and the second lens barrel 1220, respectively. The stopper 1060 can include a first stopper 1061 that limits the movement distance of the first lens barrel 1210, and a second stopper 1062 that limits the movement distance of the second lens barrel 1220. The first stopper 1061 and the second stopper 1062 can be separately disposed, or can be an interconnected structure.

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

[0197] The first stopper 1061 can include a first frame 1061a, a first extension portion 1061b extending from the first frame 1061a in a direction perpendicular to the optical axis direction, and a first buffer material 1061c provided in the first extension portion 1061b. The first buffer material 1061c can be fitted into a hole provided in the first extension portion 1061b to protrude from both sides of the first extension portion 1061b, or can be fixed to both sides of the first extension portion 1061b by bonding using an adhesive. The first frame 1061a can be mounted on the side wall and the wall on the other end of the housing 1010 to cover the upper portion of the first lens barrel 1210 in which the extension portion 1219 is provided. The first extension portion 1061b and the first buffer material 1061c can be fitted between the side of the second lens barrel 1220 and the protruding wall 1009. For example, the housing 1010 can be provided with an insertion groove 1011 in which the first frame 1061a and the first extension portion 1061b are fitted. The insertion groove 1011 can 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 downward from one end of the first insertion groove 1011a perpendicular to the optical axis direction. The first frame 1061a can be mounted on the first insertion groove 1011a, and the first extension portion 1061b can be fitted to the second insertion groove 1011b. Of course, the first frame 1061a can 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, which can be a space secured to allow the first extension portion 1061b and the first buffer material 1061c to extend, can be provided in the upper portion of the extension portion 1229 of the second lens barrel 1220 for securing a space.

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

[0200] The second stopper 1062 can include a second frame 1062a, a second extension portion 1062b extending from the second frame 1062a in a direction perpendicular to the optical axis direction, and a second buffer material 1062c disposed in the second extension portion 1062b. The second buffer material 1062c can be fitted into a hole provided in the second extension portion 1062b to protrude from both sides of the second extension portion 1062b, or can be fixed on both sides of the second extension portion 1062b by bonding using an adhesive. The second frame 1062a can 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 in which the extension portion 1229 is provided. The second extension portion 1062b and the second buffer material 1062c can be fitted between the other side of the first lens barrel 1210 and the other inner wall of the housing 1010. For example, the housing 1010 can 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 can 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 direction. The second frame 1062a can be mounted on the first insertion groove 1012a, and the second extension portion 1062b can be fitted into the second insertion groove 1012b. Of course, the second frame 1062a can 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 securing a space, which can be a space secured to allow the second extension portion 1062b and the second buffer material 1062c to extend.

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

[0203] Referring to Figure 14 , a mechanism for guiding the position at which the third lens barrel 1230 is fixed to the housing 1010 is shown.

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

[0205] Accordingly, 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 is supported on one side by the bumper material 1053. Since the bumper material 1053 has an elastic force, the third lens barrel 1230 can be assembled in a slightly concave manner between the bumper material 1053 and the protruding wall 1009. Alternatively, the third lens barrel 1230 can be first assembled to the housing 1010, and then the bumper material 1053 of the bumper 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 the bottom of the housing 1010 so that they are bonded to each other.

[0206] Referring to Figure 15 and Figure 16 , another example of a mechanism in which one of the zoom lenses according to the examples is precisely fixed in a predetermined position is shown.

[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 can not be needed. This example discloses a mechanism in which the third lens barrel 1230 is precisely disposed in a predetermined position in the housing 1010 using a ball member. After the third lens barrel 1230 is disposed in the housing 1010, an adhesive can be injected between the third lens barrel 1230 and the side wall or the bottom of the housing 1010 so that they can be bonded to each other.

[0208] First, referring to Figure 15 , the third lens barrel 1230 can be mounted 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 in which the ball members are inserted can be provided in portions of the third lens barrel 1230 and the housing 1010 that face each other, and these guide grooves can be individually provided for each ball member.

[0209] A pair of guide grooves 1234 and 1015, respectively containing ball bearing members 1235, are disposed in the third lens barrel 1230 and the housing 1010. These guide grooves can be configured to have the same shape (the ball bearing members can make point contact with the guide grooves of the third lens barrel 1230 and the housing 1010). The three guide grooves disposed in the third lens barrel 1230 or the housing 1010 can respectively provide... Figure 15 The shapes shown in the enlarged views (①, ②, and ③) are as follows: First, ① can be a guide groove formed by cutting all the corners of a triangular pyramid shape, allowing the ball bearing 1235 to contact only the three surfaces of the drawing point, and constraining the third lens barrel 1230 in the optical axis (Z-axis), the X-axis perpendicular to the optical axis, and the Y-axis perpendicular to both the optical axis and the X-axis. ② can be a guide groove that appears to have a "V" shaped groove (in which case its bottom can be cut off), which extends in the optical axis direction, allowing the ball bearing 1235 to contact only the two surfaces of the drawing point, and constraining the third lens barrel 1230 in the X-axis and Y-axis directions. ③ can be a guide groove in the optical axis direction with a long and flat bottom, allowing the ball bearing 1235 to contact only one surface of the drawing point, and constraining the third lens barrel 1230 in the Y-axis direction. Therefore, since the X-axis, Y-axis and Z-axis directions of the third lens barrel 1230 can be constrained by conditions ①, ② and ③, the third lens barrel 1230 can be precisely positioned by simply placing the ball bearing member 1235 for inserting the third lens barrel 1230 into the guide grooves 1234 and 1015.

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

[0211] The pair of guide grooves 1234 and 1015, which are respectively inserted into the ball bearing member 1235 and are disposed in the third lens barrel 1230 and the housing 1010, can be arranged differently from each other, and the other two pairs can be arranged with the same shape. For example, in the next three pairs of guide grooves, ① can be a guide groove with a pair of sidewall protrusions P, one side of which should protrude and the other side should be inserted, so that the guide grooves have different shapes.

[0212] The three guide slots respectively set in the third lens barrel 1230 or the housing 1010 can be configured as follows:Figure 16 The shapes (①, ②, and ③) shown in the enlarged view of FIG. 10. First, ① can 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 can be cut) and a side wall protrusion P protruding from both sides, can allow the ball member 1235 to contact four surfaces of the drawing point on one of the guide grooves, and to contact only 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 can be a guide groove that looks long in the optical axis direction and has a "V"-shaped groove (in this case, the bottom thereof can be cut), can allow the ball member 1235 to contact only two surfaces of the drawing point, and can constrain the third lens barrel 1230 in the X-axis direction and the Y-axis direction, and ③ can be a guide groove in the optical axis direction having a long and flat bottom, can allow the ball member 1235 to contact only one surface of the drawing point, and can constrain the third lens barrel 1230 in the Y-axis direction. Therefore, since the X-axis direction, the Y-axis direction, and the 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 to precisely position the third lens barrel 1230 by simply placing the ball member 1235 for insertion into the third lens barrel 1230 into the guide grooves 1234 and 1015.

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

[0214] First, referring to Figure 17A The lens barrel moving in the optical axis (Z-axis) direction, e.g., 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 auto focus function, and can sense a position moved according to the distance as precisely as possible with the Hall sensor 1241c or 1243c.

[0215] Accordingly, in this example, a plurality of position detection sensors, for example, Hall sensors 1241c or 1243c, are provided to face the magnets 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, Hall sensors 1241c or 1243c) can be provided.

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

[0217] In this example, the magnets 1241a or 1243a can be provided to have N and S poles 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 magnets 1241a or 1243a can be two-pole magnets magnetized to have N and S poles in the optical axis direction (in this case, a "neutral region" can exist between the N and S poles). Alternatively, the magnets 1241a or 1243a can be magnetized to have one magnetic pole, respectively, so that two magnets having N and S poles can be arranged in sequence on the surface facing the coil 1241b or 1243b in the optical axis direction (in this case, the N and S poles can be in close contact, or can be spaced apart to have a "gap" between the N and S poles). In all examples, the term "gap region" can also be used as a term including "neutral region" and "gap".

[0218] The magnets 1241a or 1243a can be provided to face the coils 1241b or 1243b.

[0219] In this case, in a non-driving state in which no power is applied to the coils 1241b or 1243b, the Hall sensors (Hall 1, Hall 2, Hall 3, and Hall 4) 1241c or 1243c facing the N and S poles of the magnets 1241a or 1243a, respectively, can be provided, and the four Hall sensors can be arranged side by side in the moving direction of the magnets 1241a or 1243a within the coiled portion of the coil 1241b or 1243b. The four Hall sensors can be spaced apart at the same distance, or the Hall sensors (Hall 1 to Hall 4) arranged on the N and S poles of the magnet with respect to the neutral region of the magnet can be provided symmetrically.

[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 respective positions, the four Hall sensors (Hall 1 to Hall 4) can have respective sensing values according to the position of the magnet, as shown in Figure 17B . Further, 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 approximately in proportion to the movement of the magnet. Further, the total Hall sensing value added over the range of movement of the magnet can have different values. For example, it can be seen that the value of the "Hall signal" in Figure 17B has different values in the range of -2 mm to 2 mm.

[0221] Therefore, it can be difficult to sense the position of a magnet according to a relatively long distance movement with one or a relatively small number of Hall sensors, but it can be seen that when a plurality (for example, four) of Hall sensors are used, the position can be more accurately sensed although the magnet can travel a relatively long distance.

[0222] Referring to Figure 18A and Figure 19A , other examples are shown in which only the number of Hall sensors is changed in the positional relationship shown in Figure 17A . Referring to Figure 18B and Figure 19B , it can be seen that the sensing of the sensing signal (Hall signal) in which the signals of the Hall sensors are sensed and the values are summed therefrom can increase or decrease approximately in proportion to the movement of the magnet.

[0223] 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 disposed to have substantially the same distance of N and S poles in the optical axis direction.

[0224] In other examples of Figure 18A and Figure 19A , the Hall sensors 1241c or 1243c can be disposed inside the coil 1241b or 1243b, and the number of Hall sensors can be different from the number of Hall sensors shown in Figure 17A .

[0225] For example, a plurality of position detection sensors (Hall sensors) 1241c or 1243c can be provided to face a 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 position detection sensor 1241c or 1243c composed of a set of three position detection sensors ( Figure 18A ) or five position detection sensors ( Figure 19A ) can be provided. In another example, the magnet 1241a or 1243a can be provided to have N and S poles 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 N and S poles in the optical axis direction (in this case, there can be a "neutral region" between the N and S poles). Alternatively, the magnet 1241a or 1243a can be magnetized to have one magnetic pole, respectively, so that two magnets having N and S poles can be arranged in the optical axis direction on the surface facing the coil 1241b or 1243b in order (in this case, the N and S poles can be in close contact, or can be spaced apart to have a "gap" between the N and S poles).

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

[0227] For example, Figure 18A The illustrated example can include three position detection sensors (Hall sensors, Hall 1 to Hall 3) 1241c or 1243c, and the three 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 three Hall sensors can be spaced apart at the same distance. Alternatively, the Hall sensors (Hall 1 to Hall 3) can be provided to face the N pole, the neutral region (or "gap"), and the S pole of the magnet, respectively.

[0228] Figure 19AThe example shown in FIG. 12A 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-driven state in which no power is applied to the coil 1241b or 1243b, the Hall sensors (Hall 1 to Hall 5) can be disposed to face the N pole, the neutral region (or "gap"), and the S pole of the magnet, respectively. For example, two Hall sensors (Hall 1 and Hall 2) facing the N pole, one Hall sensor (Hall 3) facing the neutral region (or "gap"), and two Hall sensors (Hall 4 and Hall 5) facing the S pole can be provided.

[0229] In this way, when the magnet 1241a or 1243a and the three or five Hall sensors 1241c or 1243c are arranged and the magnet 1241a or 1243a moves in two directions (+ or - direction) at the respective positions, the three or five Hall sensors can have respective sensing values according to the position of the magnet, as shown in Figure 18B (three Hall sensors) or Figure 19B (five Hall sensors). As can be seen, 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 approximately in proportion to the movement of the magnet.

[0230] The total Hall sensing value summed over the moving range of the magnet can have different values. For example, as can be seen, Figure 18B and Figure 19B the values of "Hall signal" in the range of -2 mm to 2 mm have different values.

[0231] Therefore, it can be difficult to sense the position of the magnet according to the relatively long distance movement with one Hall sensor, but as can be seen, when two or more Hall sensors are used in an even number (for example, Figure 17A ) or an odd number (for example, Figure 18A and Figure 19A ), it is possible to more accurately sense the position although the magnet can travel a relatively long distance. 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 the direction facing their respective centers, and the magnet 1241a or 1243a can be disposed to have substantially the same distance of the N pole and the S pole in the optical axis direction.

[0232] Next, referring to FIG. 13, a method of sensing the position of a magnet 1341a or 1343a using a coil 1341b or 1343b and a plurality of Hall sensors 1341c or 1343c will be described.Figure 20A or Figure 21A A lens barrel (e.g., the first lens barrel 1210 or the second lens barrel 1220) that moves in the optical axis direction can move a considerable distance in the optical axis direction to perform a zoom function or an auto focus function, and the position moved according to the distance can be sensed as precisely as possible with a position detection sensor (a Hall sensor) 1241c or 1243c.

[0233] Therefore, in this example, a plurality of Hall sensors 1241c or 1243c, e.g., Hall sensors consisting of four or six Hall sensors as a group, are provided to face magnets 1241a or 1243a disposed in the first lens barrel 1210 or the second lens barrel 1220.

[0234] The magnets in this example can be magnets for driving the lens barrel, or can be disposed separately from the lens barrel for position sensing.

[0235] In this example, the magnets 1241a or 1243a can be disposed to have N poles and S poles alternately arranged 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 magnets can be disposed to have at least magnetic poles (N pole, S pole, and N pole) or to have magnetic poles (S pole, N pole, and S pole) in the optical axis direction. For example, the magnets 1241a or 1243a can be three-pole magnets magnetized to have at least three polarities (including N pole and S pole) in the optical axis direction (in this case, there can be a "neutral region" between the N pole and the S pole). Alternatively, the magnets 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 sequentially arranged in the optical axis direction on a surface facing the coil 1241b or 1243b (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).

[0236] The magnets 1241a or 1243a can be disposed to face the coil 1241b or 1243b, which is disposed as a group consisting of two coils (for example, the coil facing the magnet can be at least two). In this case, the two coils 1241b or 1243b can be disposed 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 can be provided, which are disposed to face two N poles or S poles on both sides of the magnet 1241a or 1243a, respectively.

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

[0239] Further, when six Hall sensors (Hall 1 to Hall 6) are provided, as shown in Figure 21A each of the two N-poles provided on both sides, with an S-pole interposed between the two N-poles, the three Hall sensors being provided at the left end, the center and the right end of the corresponding N-pole, respectively, i.e. three Hall sensors are provided for each pole, 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 can be arranged in groups of the same polarity at different positions facing the magnet 1241a or 1243a at equal intervals. For example, as shown in Figure 20A or Figure 21A The arrangement of the Hall sensors inside the coils 1241b or 1243b provided on the left and right sides can be substantially the same.

[0241] In this way, when the magnet 1241a or 1243a and the four or six Hall sensors 1241c or 1243c are arranged and the magnet 1241a or 1243a moves in two directions (+ or - direction) at the corresponding positions, the four or six Hall sensors can have corresponding sensing values according to the position of the magnet, as shown in Figure 20B or Figure 21B Further, it can be seen that when these values are partially summed and subtracted, for example, the total sum of the sensing values of all Hall sensors facing any polarity of the magnet 1241a or 1243a is subtracted from the total sum of the sensing values of all Hall sensors facing another 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 approximately in proportion to the movement of the magnet. Further, the total Hall sensing value summed within the movement range of the magnet can have different values. For example, it can be seen that Figure 20B and Figure 21B the values of "Hall signal" in and have different values in the range of -2 to 2 mm.

[0242] Accordingly, it can be difficult to sense the position of the magnet according to 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 more precisely sensed although the magnet can travel a relatively long distance. Of course, the number of Hall sensors is not limited thereto, and is applicable when two or more Hall sensors are arranged apart to face the same polarity in two sides of the three-pole magnet. In this case, in a non-driving state in which no electric 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 disposed such that at least two N-poles (or S-poles) facing the Hall sensors are substantially the same distance in the direction of the optical axis.

[0243] Figure 22 is a perspective view of a main board on which coils and components are mounted according to an example.

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

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

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

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

[0248] The coil 1141b for driving the first driving portion 1140 of the reflection module 1100 and the sensor 1141c for sensing the position of the reflection module 1100 can be mounted on the bottom plate 1073.

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

[0250] Further, the plurality of coils 1141b, 1143b, 1145b, 1241b, 1243b, and 1245b and the position detection sensors 1141c, 1143c, 1241c, 1243c, and 1245c that can be mounted on the first side plate 1071, the second side plate 1072, and the bottom plate 1073 can be differently separated and mounted 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] Referring to Figure 23 , the portable electronic device 2 can be a portable electronic device, such as a mobile communication terminal, a smart phone, a tablet PC, etc., on which a plurality of camera modules 500 and 1000 are mounted.

[0253] The plurality of camera modules 500 and 1000 can be mounted in the portable electronic device 2.

[0254] At least one of the plurality of camera modules 500 and 1000 can be the camera module 1000 according to the various examples described with reference to Figures 2 to 16

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

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

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

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

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

[0260] Further, in order to maximize the performance of the zoom lens, the movement position of the zoom lens can be accurately measured through a plurality of Hall sensors.

[0261] While the disclosure includes specific examples, it will be apparent to one of ordinary skill in the art that various changes in form and details can be made without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered merely illustrative, and not restrictive, in nature. Descriptions of features or aspects in each example are considered to apply to similar features or aspects in other examples. Suitable results can be obtained if the described techniques are performed in a different order, and / or if components in the described systems, architectures, devices, or circuits are combined in a different manner, or substituted for other components or their equivalents. Accordingly, the scope of the disclosure is not limited to the specific embodiments described, but only by the claims and their equivalents. All changes that come within the meaning of the claims and their equivalents are intended to be embraced by the claims.

Claims

1. Camera module, including: case; A lens barrel is disposed within the housing and is movable along the optical axis. A reflection module is disposed in front of the lens barrel and is rotatably supported relative to the housing; The driving section includes a magnet disposed on the lens barrel and a coil disposed facing the magnet in a first axial direction perpendicular to the optical axis. Three ball support members are disposed between the lens barrel and the housing. The lens barrel is provided with a traction magnet, and the housing is provided with a traction yoke facing the traction magnet. The lens barrel includes a side surface and a side surface spaced apart in the first axial direction, and the magnet is disposed on the side surface of the lens barrel. Compared to being closer to the other side surface, two of the three ball bearings are positioned closer to the first side surface.

2. The camera module according to claim 1, wherein, Compared to being closer to one side surface, the remaining ball support of the three ball supports is positioned closer to the other side surface.

3. The camera module according to claim 2, wherein, The traction magnet is positioned closer to both ball supports than to one ball support.

4. The camera module according to claim 1, wherein, The two ball bearings are disposed in the space between one side surface of the lens barrel and the traction magnet.

5. The camera module according to claim 1, wherein, The two ball bearings are spaced apart in the direction of the optical axis.

6. The camera module according to claim 1, wherein, The traction magnet and the traction yoke face each other in a second axial direction perpendicular to both the optical axis and the first axial direction.

7. The camera module according to claim 1, wherein, Multiple guide grooves are formed on the lower surface of the lens barrel, in which the three ball support members are disposed. The lens barrel includes an extension portion extending along the optical axis, and Some of the plurality of guide grooves extend to the lower surface of the extension portion.

8. The camera module according to claim 7, wherein, One of the two ball bearings is disposed between the lower surface of the extension and the housing.

9. The camera module according to claim 1, wherein, The housing has a through hole, and The magnet and the coil face each other directly through the through hole.

10. The camera module according to claim 1, wherein, One surface of the magnet facing the coil is magnetized to have an N pole, a neutral region, and an S pole along the optical axis.

11. The camera module according to claim 1, wherein, The position sensor is located inside the coil.

12. The camera module according to claim 1, further comprising a plurality of magnets disposed on the reflective module and a plurality of coils facing the plurality of magnets. in, The housing also includes multiple through holes, and The plurality of magnets and the plurality of coils face each other directly through the plurality of through holes.

13. The camera module according to claim 12, wherein, One of the plurality of magnets is disposed on the bottom surface of the reflective module, and Two of the plurality of magnets are disposed on one side surface and the other side surface of the reflective module.

14. The camera module according to claim 12, wherein, The position sensor is located within the plurality of coils.

15. The camera module according to claim 12, wherein, The motherboard is mounted on the casing, and The coil and the plurality of coils are disposed on the mainboard.

16. The camera module according to claim 1, wherein, A ball support is provided between the reflection module and the housing.

17. The camera module according to claim 1, wherein, An elastic buffer is disposed between the reflection module and the lens barrel.

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