Camera module

Abstract

The camera module includes: a first lens barrel configured to receive one or more lens groups; a second lens barrel coupled to the first lens barrel and configured to support a front lens disposed on the object side of the one or more lens groups; an energy generation unit configured to contact the second lens barrel and configured to supply thermal energy to the second lens barrel; and a barrel bracket coupled to the first lens barrel and configured to house the energy generation unit.

Description

[0001] Cross - reference to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10 - 2021 - 0019049, filed on February 10, 2021, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical field

[0003] The following description relates to a camera module configured to significantly reduce the effects of external environmental changes. Background art

[0004] The resolution and field of view of a camera module can depend on the state of the front lens. For example, foreign substances (dust, frost, water droplets, etc.) attached to the front lens may damage the resolution of the camera module or narrow the actual viewing angle and field of view. Specifically, since the camera module exposed to the outside is prone to frosting, dew condensation, etc. on the front lens, the resolution of the camera module may deteriorate, and the field of view may be blocked due to foreign substances.

[0005] The above information is presented only as background information to aid in understanding the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above constitutes prior art with respect to the present disclosure. Summary of the invention

[0006] The Summary of the Invention section is intended to introduce, in a brief form, a selection of inventive concepts, which will be further described in the Detailed Description section below. The Summary of the Invention section is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to assist in determining the scope of the claimed subject matter.

[0007] In one general aspect, a camera module includes: a first lens barrel configured to receive one or more lens groups; a second lens barrel coupled to the first lens barrel and configured to support a front lens disposed on the object side of the one or more lens groups; an energy generation unit configured to contact the second lens barrel and configured to supply thermal energy to the second lens barrel; and a barrel bracket coupled to the first lens barrel and configured to accommodate the energy generation unit.

[0008] The second lens barrel may be formed of a material having a higher thermal conductivity than the thermal conductivity of the first lens barrel.

[0009] The second lens barrel may be formed of a material having a higher thermal conductivity than the thermal conductivity of the barrel bracket.

[0010] The camera module may further include a first airtight member disposed between the first lens barrel and the second lens barrel.

[0011] The camera module may further include a housing configured to be coupled to the lens barrel bracket.

[0012] The camera module may further include a cover member coupled to the second lens barrel and configured to press an edge of the front lens.

[0013] The camera module may further include a second airtight member disposed between the lens barrel bracket and the cover member.

[0014] The camera module may further include a gap maintaining member disposed between the one or more lens groups and the front lens.

[0015] In another general aspect, a camera module includes: a first lens barrel configured to accommodate one or more lens groups; a second lens barrel coupled to the first lens barrel and configured to support a protective glass disposed on an object side of the one or more lens groups; an energy generating unit configured to contact the second lens barrel and configured to supply thermal energy to the protective glass; and a lens barrel bracket coupled to the first lens barrel and configured to receive the energy generating unit.

[0016] The camera module may further include a first airtight member disposed on the first lens barrel and the second lens barrel.

[0017] The camera module may further include a cover member coupled to the second lens barrel and configured to press an edge of the protective glass.

[0018] The energy generating unit may include a heating member, a first electrode member disposed on one side of the heating member, and a second electrode member disposed on the other side of the heating member.

[0019] The camera module may further include a first substrate coupled to the lens barrel bracket and having an image sensor mounted thereon.

[0020] The camera module may further include a second substrate electrically connected to the energy generating unit and disposed at a distance from the first substrate.

[0021] In another general aspect, a camera module includes an energy generating unit, a front lens disposed on an optical axis, and a heat transfer member disposed between the energy generating unit and the front lens, wherein the heat transfer member is configured to supply thermal energy to the front lens.

[0022] The front lens may have a refractive power.

[0023] The camera module may further include a first lens barrel disposed toward an image side of the front lens and configured to accommodate one or more lens groups along the optical axis, wherein the heat transfer member may have a higher thermal conductivity than the first lens barrel.

[0024] The heat transfer member may include a second lens barrel coupled to the first lens barrel and configured to support the front lens.

[0025] The camera module may further include a lens barrel bracket that houses the first lens barrel, wherein the second lens barrel may be formed of a material having a higher thermal conductivity than that of the lens barrel bracket.

[0026] The camera module may further include a sealing structure disposed between the heat transfer member and the front lens.

[0027] Other features and aspects will become apparent in light of the appended claims, the drawings, and the following detailed description. Description of the Drawings

[0028] Figure 1 is an exploded perspective view of a camera module according to an example.

[0029] Figure 2 is a perspective view showing Figure 1 the camera module shown.

[0030] Figure 3 is Figure 2 a cross-sectional view of the camera module shown.

[0031] Figure 4 is a cross-sectional view showing the operating principle of a camera module according to an example.

[0032] Figure 5 is an exploded perspective view of a camera module according to another example.

[0033] Figure 6 is Figure 5 a combined perspective view of the camera module shown.

[0034] Figure 7 is Figure 6 a cross-sectional view of the camera module shown.

[0035] Figure 8 is a cross-sectional view showing the operating principle of a camera module according to another example.

[0036] Throughout the drawings and the detailed description, like reference numerals refer to like elements. For clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative dimensions, proportions, and depictions of elements in the drawings may be exaggerated. Detailed Description

[0037] Hereinafter, although examples of the present disclosure will be described in detail with reference to the drawings, it should be noted that the examples are not limited thereto.

[0038] The following specific embodiments are provided to assist the reader in obtaining a comprehensive understanding of the methods, apparatuses, and / or systems described in this application. However, various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described in this application will be apparent after understanding this disclosure. For example, the order of operations described in this application is merely exemplary and, except for operations that must occur in a specific order, is not limited to the order set forth in this application and can be changed, which will be apparent after understanding this disclosure. Additionally, descriptions of features known in the art may be omitted for greater clarity and conciseness.

[0039] The features described in this application may be implemented in different forms and should not be construed as limited to the examples described in this application. Rather, the examples described in this application are provided merely to illustrate some of the many possible ways of implementing the methods, apparatuses, and / or systems described in this application that will be apparent after understanding this disclosure.

[0040] It should be noted that in this application, the wording "may" is used with respect to an embodiment or example, such as with respect to what an embodiment or example may include or achieve, meaning that there is at least one embodiment or example in which such a feature is included or achieved, and not all embodiments and examples are so limited.

[0041] Throughout the specification, when an element such as a layer, region, or substrate is described as being "on," "connected to," or "coupled to" another element, the element may be directly "on," directly "connected to," or directly "coupled to" the other element, or there may be one or more other elements intervening between the element and the other element. Conversely, when an element is described as being "directly on," "directly connected to," or "directly coupled to" another element, there are no other elements intervening between the element and the other element.

[0042] As used in this application, the wording "and / or" includes any one of the associated listed items and any combination of any two or more of them; similarly, "at least one" includes any one of the associated listed items and any combination of any two or more of them.

[0043] Although terms such as "first", "second", and "third" may be used in this application to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, part, region, layer, or section from another. Thus, without departing from the teachings of the examples described in this application, the first component, first part, first region, first layer, or first section mentioned in these examples may also be referred to as the second component, second part, second region, second layer, or second section.

[0044] Spatial relative terms such as "above", "upper", "below", and "lower" may be used in this application for convenience of description to describe the relationship of one element to another as shown in the drawings. In addition to covering the orientations depicted in the drawings, these spatial relative terms are intended to also cover different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as "above" or "upper" relative to another element will be "below" or "lower" relative to that other element. Thus, depending on the spatial orientation of the device, the term "above" covers both the orientation of "above" and "below". The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used in this application should be interpreted accordingly.

[0045] The terms used in this application are only for describing various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the articles "a", "an", and "the" are intended to also include the plural forms. The terms "comprising", "including", and "having" specify the presence of the stated features, numbers, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, components, elements, and / or combinations thereof.

[0046] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Thus, the examples described in this application are not limited to the specific shapes shown in the drawings, but include shape variations that occur during manufacturing.

[0047] The features of the examples described in this application may be combined in various ways that will be apparent after obtaining an understanding of the disclosure. In addition, although the examples described in this application have various configurations, other configurations that will be apparent after obtaining an understanding of the disclosure are also possible.

[0048] The examples disclosed in this application provide a camera module configured to remove foreign matter, frost, etc. attached to the frontmost lens.

[0049] The camera module according to an example of the present disclosure can be installed on a device that is easily exposed to the external environment. For example, the camera module can be installed on a vehicle, a surveillance device for crime prevention, a surveillance device for security, etc. However, the scope of use of the camera module according to an example of the present disclosure is not limited to the above devices. For example, the camera module according to the example can be installed on a calling device in a common entrance of an apartment, a calling device in a building entrance, etc.

[0050] The camera module can be configured to convert an optical signal reflected from an object into an electrical signal. For example, the camera module can convert an optical signal incident through one or more lenses into an electrical signal through an image sensor. The resolution of the camera module can depend on the amount of light incident on the camera module. For example, if the amount of light incident on the camera module decreases or increases due to foreign matter attached to the cover glass or front lens of the camera module, the phase conversion through the image sensor cannot be smoothly performed.

[0051] In an example of the present disclosure, the camera module can be configured to remove foreign matter attached to the protective glass or front lens of the camera module by various types of energy. For example, the camera module according to the example can remove water droplets, frost, moisture, ice, etc. attached to, condensed, or accumulated on the protective glass or front lens by using thermal energy.

[0052] The camera module according to the example can include a lens barrel, an energy generation unit, and a barrel bracket. However, the configuration of the camera module is not limited to the lens barrel, the energy generation unit, and the barrel bracket.

[0053] The lens barrel can include a first lens barrel and a second lens barrel. However, the configuration of the lens barrel is not limited to the first lens barrel and the second lens barrel. For example, the lens barrel can further include a third lens barrel in addition to the first lens barrel and the second lens barrel. The lens barrel can be configured to receive a lens. For example, the first lens barrel can be configured to receive one or more lens groups, and the second lens barrel can be configured to support or receive a front lens disposed on the object side of the lens group.

[0054] The first lens barrel and the second lens barrel can be formed of different materials. For example, the second lens barrel can be formed of a material having a higher thermal conductivity than that of the first lens barrel. For example, the first lens barrel can be formed of a material such as plastic or resin, and the second lens barrel can be formed of a metal material or a material including a metal.

[0055] The energy generation unit may be configured to supply thermal energy to the lens barrel. For example, the energy generation unit may be configured to supply thermal energy to the second lens barrel. The energy generation unit may be configured to convert electrical energy into thermal energy. For example, the energy generation unit may include a positive temperature coefficient (PTC) heater. However, the form of the energy generation unit is not limited to the PTC heater.

[0056] The lens barrel bracket may be configured to be coupled to the lens barrel. For example, the lens barrel bracket may be coupled to the first lens barrel. The lens barrel bracket may be configured to receive the energy generation unit. For example, the lens barrel bracket may be configured to receive the energy generation unit therein while being coupled to the first lens barrel. The lens barrel bracket may be formed of a material different from that of the lens barrel. For example, the lens barrel bracket may be formed of a material having a lower thermal conductivity than that of the second lens barrel.

[0057] In addition to the above components, the camera module may further include other components. For example, the camera module may further include an airtight member, a housing cover member, etc.

[0058] Hereinafter, examples will be described in detail based on the drawings.

[0059] First, reference will be made to Figures 1 to 4 describe the camera module according to the example.

[0060] The camera module 10 according to the example includes a first lens barrel 100, a second lens barrel 200, an energy generation unit 300, and a lens barrel bracket 400. In addition, the camera module 10 may further include a cover member 500, an airtight member 600, a housing 700, and a substrate 900.

[0061] The first lens barrel 100 is configured to accommodate, for example, one or more lens groups LG (LG1, LG2) disposed along the optical axis "C". For example, the first lens barrel 100 may be configured to accommodate a first lens group LG1 including three lenses L2, L3, and L4 and a second lens group LG2 including three lenses L5, L6, and L7. However, the number of lens groups accommodated in the first lens barrel 100 is not limited to two. For example, the first lens barrel 100 may be configured to accommodate one lens group composed of four to six lenses. As another example, the first lens barrel 100 may be configured to accommodate a first lens group composed of two to four lenses and a second lens group composed of two to four lenses.

[0062] The first lens barrel 100 can be configured to maintain the lens group LG at a constant temperature. For example, the first lens barrel 100 can be formed of a material having a relatively low thermal conductivity so that external heat or cold air does not transfer to the lens group LG housed therein. The first lens barrel 100 can be configured to make the camera module 10 lightweight. For example, the first lens barrel 100 can be formed of a lightweight and impact-resistant material such as plastic. However, the material of the first lens barrel 100 is not limited to plastic.

[0063] The first lens barrel 100 can be configured to be rigidly coupled to an adjacent member. As an example, a first threaded portion 112 for coupling with the second lens barrel 200 can be formed on a part of the first lens barrel 100. As another example, a second threaded portion 114 for coupling with the lens barrel bracket 400 can be formed on another part of the first lens barrel 100. The first threaded portion 112 and the second threaded portion 114 can be formed on the outer peripheral surface of the first lens barrel 100, respectively. For example, the first threaded portion 112 can be formed on the upper outer peripheral surface of the first lens barrel 100, and the second threaded portion 114 can be formed on the lower outer peripheral surface of the first lens barrel 100. The first threaded portion 112 and the second threaded portion 114 can be configured to define coupling positions between the first lens barrel 100 and the second lens barrel 200 and the lens barrel bracket 400. For example, the first threaded portion 112 and the second threaded portion 114 can be formed to have different sizes. Specifically, the second lens barrel 200 can be restrictedly coupled to the first threaded portion 112 of the first lens barrel 100, and the lens barrel bracket 400 can be restrictedly connected to the second threaded portion 114 of the first lens barrel 100. Therefore, the first lens barrel 100 according to this example can significantly reduce the assembly failure phenomenon caused by the change in the coupling positions of the second lens barrel 200 and the lens barrel bracket 400.

[0064] The first lens barrel 100 can include a configuration for defining the coupling position of the second lens barrel 200. For example, a first stepped portion 122 for contacting the end of the second lens barrel 200 can be formed on the outer peripheral surface of the first lens barrel 100. The first stepped portion 122 can be configured not to interfere with the threaded engagement between the first lens barrel 100 and the second lens barrel 200. For example, the first stepped portion 122 can be formed between the first threaded portion 112 and the second threaded portion 114.

[0065] The second lens barrel 200 is configured to be coupled to the first lens barrel 100. For example, a threaded portion 212 that is fastened to the first threaded portion 112 may be formed on the inner circumferential surface of the second lens barrel 200. Accordingly, the second lens barrel 200 may be firmly coupled to the first lens barrel 100 by being fastened between the first threaded portion 112 and the threaded portion 212.

[0066] The second lens barrel 200 may be configured to accommodate one or more lenses. For example, the second lens barrel 200 may accommodate the front lens L1 in an inner space 202. The front lens L1 may be disposed on the object side of the lens group LG. The front lens L1 may be the lens that is disposed closest to the object side among the lenses constituting the camera module 10. Specifically, the front lens L1 may be disposed on the outermost side (in front of the camera module 10) among the lenses having a refractive power. The second lens barrel 200 may be configured to contact the front lens L1. For example, the second lens barrel 200 may contact a flange portion L1P of the front lens L1.

[0067] The second lens barrel 200 may be configured to absorb heat energy generated from the energy generating unit 300. For example, the second lens barrel 200 may be formed of a material having a relatively high specific heat to absorb a large amount of heat energy. The second lens barrel 200 may be configured to transfer the absorbed heat energy to the front lens L1. For example, the second lens barrel 200 may be formed of a material having a high thermal conductivity. Specifically, the second lens barrel 200 may be formed of a metal material. However, the material of the second lens barrel 200 is not limited to a metal. The second lens barrel 200 may have a higher thermal conductivity than adjacent members. For example, the second lens barrel 200 may be formed of a material having a higher thermal conductivity than the thermal conductivities of the first lens barrel 100 and the lens barrel bracket 400.

[0068] The second lens barrel 200 can be configured to contact the energy generating unit 300. Specifically, the second lens barrel 200 can be configured to contact the energy generating unit 300 in a state where the second lens barrel 200 is coupled to the first lens barrel 100. The second lens barrel 200 can include an extension portion 230 that extends downward (in the direction of the image sensor). The extension portion 230 can be configured to contact the energy generating unit 300. For example, when the second lens barrel 200 is coupled to the first lens barrel 100, the extension portion 230 can contact the energy generating unit 300. The second lens barrel 200 can be configured to contact the energy generating unit 300 more closely than the first lens barrel 100. For example, the distance from the inner surface 312 of the energy generating unit 300 to the outer peripheral surface of the extension portion 230 can be less than the distance from the inner surface 312 of the energy generating unit 300 to the outer peripheral surface of the first lens barrel 100. However, the distance from the inner surface 312 of the energy generating unit 300 to the outer peripheral surface of the extension portion 230 is not necessarily less than the distance from the inner surface 312 of the energy generating unit 300 to the outer peripheral surface of the first lens barrel 100. For example, the distance from the inner surface 312 of the energy generating unit 300 to the outer peripheral surface of the extension portion 230 can be substantially the same as the distance from the inner surface 312 of the energy generating unit 300 to the outer peripheral surface of the first lens barrel 100.

[0069] The energy generating unit 300 can be configured to generate thermal energy for heating an adjacent member. For example, the energy generating unit 300 can include a resistor configured to convert electrical energy into thermal energy. As another example, the energy generating unit 300 can be configured in the form of a PTC heater that is configured to dissipate heat at a constant temperature. As another example, the energy generating unit 300 can include a vibration device configured to generate thermal energy through vibration. However, the shape of the energy generating unit 300 is not limited to the types listed above.

[0070] The energy generating unit 300 according to this example can include a heating member 310, a first electrode member 320, and a second electrode member 330.

[0071] The heating member 310 can be configured to convert electrical energy into thermal energy. For example, the heating member 310 can be formed of a material such as ceramics having a high resistance. However, the material of the heating member 310 is not limited to ceramics. The heating member 310 can be formed in an annular shape with one side open. The heating member 310 can be configured to be elastically deformable. For example, the distance G between the two ends of the heating member 310 can be enlarged or reduced according to the elastic deformation of the heating member 310.

[0072] The heating member 310 can be configured to be in close contact with the second lens barrel 200. For example, the inner diameter Di of the heating member 310 can be substantially the same as the outer diameter Db2 of the extension 230 of the second lens barrel 200. However, the inner diameter Di of the heating member 310 does not have to be the same as the outer diameter Db2 of the extension 230 of the second lens barrel 200. For example, the inner diameter Di of the heating member 310 can be smaller than the outer diameter Db2 of the extension 230 of the second lens barrel 200. The inner diameter Di of the heating member 310 can be changed by elastic deformation of the heating member 310. For example, the inner diameter Di of the heating member 310 can be formed to be smaller than the outer diameter Db2 of the extension 230 of the second lens barrel 200. However, when the heating member 310 is coupled to the extension 230 of the second lens barrel 200, the inner diameter Di of the heating member 310 can be transformed into a size substantially the same as the outer diameter Db2 of the extension 230 by elastic deformation. As described above, since the elastically deformable heating member 310 can be in close contact with the second lens barrel 200, the thermal energy contained in the heating member 310 can be quickly transferred to the second lens barrel 200.

[0073] The first electrode member 320 and the second electrode member 330 can be configured to supply current to the heating member 310. For example, the first electrode member 320 and the second electrode member 330 are electrically connected to the power supply terminal 920 of the substrate 900 to supply the current supplied from the power supply terminal 920 to the heating member 310. The first electrode member 320 and the second electrode member 330 can be disposed on the heating member 310. For example, the first electrode member 320 can be disposed above the heating member 310, and the second electrode member 330 can be disposed below the heating member 310. However, the arrangement positions of the first electrode member 320 and the second electrode member 330 are not limited to above and below the heating member 310. For example, the first electrode member 320 and the second electrode member 330 can also be disposed on the inner circumferential surface and the outer circumferential surface of the heating member 310 within a range that does not interfere with the contact between the heating member 310 and the second lens barrel 200. The first electrode member 320 and the second electrode member 330 can be configured to be connected to the connection line 340 (see Figure 3 ). For example, the terminals 322 and 332 to be connected to the connection line 340 can be formed at one end of the first electrode member 320 and one end of the second electrode member 330. The terminals 322 and 332 can be formed to be bent toward one side. For example, the terminals 322 and 332 can be configured to be bent in the longitudinal direction of the camera module 10. However, the terminals 322 and 332 do not have to be configured in a bent shape.

[0074] The lens barrel holder 400 can be configured to accommodate the first lens barrel 100. For example, the first lens barrel 100 can be received in the internal space 402 of the lens barrel holder 400. The lens barrel holder 400 can be configured to be coupled to the first lens barrel 100. For example, a threaded portion 414 to be fastened to the second threaded portion 114 of the first lens barrel 100 can be formed in the internal space 402 of the lens barrel holder 400.

[0075] The lens barrel holder 400 can be configured to be able to remove and insert the connection line 340. For example, a hole 404 can be formed on one side of the lens barrel holder 400 to allow the removal and insertion of the connection line 340.

[0076] The lens barrel holder 400 can be configured to be coupled to the substrate 900. For example, the lens barrel holder 400 can be coupled to the substrate 900 through a plurality of leg members 406 extending downward. The lens barrel holder 400 can be configured in such a way that the distance from the end of the first lens barrel 100 to the substrate 900 or the image sensor 910 is sufficiently formed. For example, the leg members 406 of the lens barrel holder 400 can extend to have a significant length Lh such that the distance from the end of the first lens barrel 100 to the image sensor 910 is sufficiently formed.

[0077] The cover member 500 can be configured to be coupled to the second lens barrel 200. For example, the cover member 500 can be firmly coupled to the outer peripheral surface of the second lens barrel 200 by methods such as press fitting, screw fastening, etc.

[0078] The cover member 500 can be configured to prevent the front lens L1 from separating. For example, the cover member 500 can be coupled to the second lens barrel 200 while pressing the edge of the front lens L1. The cover member 500 can have an opening 510 that allows light to enter. The diameter EP of the opening 510 can have a predetermined large - small relationship with the size of the front lens L1. For example, the diameter EP of the opening 510 can be substantially equal to or larger than the effective diameter ED of the front lens L1. As another example, the diameter EP of the opening 510 can be smaller than the maximum diameter LD of the front lens L1 (including the maximum diameter of the flange portion L1P).

[0079] The cover member 500 can be configured to significantly reduce the penetration of external heat or cold air. For example, the cover member 500 can be formed of a material having a low thermal conductivity. The cover member 500 can be configured to significantly reduce the phenomenon of heat loss of the second lens barrel 200 to the outside. For example, the cover member 500 can be formed of a material that can retain warmth.

[0080] The airtight member 600 can be configured to prevent external air or foreign objects from invading or penetrating the camera module 10. For example, the airtight member 600 can be configured to prevent external air or foreign objects from invading through the connection part between members. The airtight member 600 can include a first airtight member 610, a second airtight member 620, and a third airtight member 630.

[0081] The first airtight member 610 can be disposed between the first lens barrel 100 and the second lens barrel 200. For example, as Figure 3 shown, the first airtight member 610 is disposed between the outer peripheral surface of the first lens barrel 100 and the inner peripheral surface of the second lens barrel 200 to prevent foreign objects from flowing in through the connection part between the first lens barrel 100 and the second lens barrel 200.

[0082] The second airtight member 620 can be disposed between the front lens L1 and the cover member 500. For example, the second airtight member 620 is disposed between the flange portion L1P of the front lens L1 and the cover member 500 to prevent foreign objects and external air from flowing in through the contact part or gap between the front lens L1 and the cover member 500.

[0083] The third airtight member 630 can be disposed between the lens barrel bracket 400 and the cover member 500. For example, the third airtight member 630 is disposed between the upper step portion 420 of the lens barrel bracket 400 and the lower extension portion 520 of the cover member 500 to prevent foreign objects and external air from flowing in through the gap between the lens barrel bracket 400 and the cover member 500.

[0084] The camera module 10 may further include a gap maintaining member 660 as needed. The gap maintaining member 660 can be disposed between the front lens L1 and the lens group LG to maintain a constant distance between the front lens L1 and the lens group LG. In addition, the gap maintaining member 660 can be configured to prevent or significantly reduce heat transfer between the front lens L1 and the lens group LG. For example, the gap maintaining member 660 can be formed of a material having a relatively low thermal conductivity.

[0085] The housing 700 can be configured to accommodate the first lens barrel 100, the second lens barrel 200, the energy generating unit 300, the lens barrel bracket 400, and the substrate 900 therein. For example, an internal space 702 capable of accommodating the above-mentioned members can be formed in the housing 700. The internal space 702 can be open to one side (upper side) of the housing 700.

[0086] The housing 700 can be configured to be coupled to the lens barrel bracket 400. For example, the housing 700 can be coupled to the flange 430 of the lens barrel bracket 400 by means of protrusions and grooves, bolts or screws, adhesives, etc. The housing 700 can include a configuration for enabling a connection between the substrate 900 or components mounted on the substrate 900 and an external device. For example, an inwardly opening connector 710 can be formed on one side of the housing 700.

[0087] The housing 700 can be configured to protect internal components from external impacts. For example, the housing 700 can be formed of a material having a predetermined strength and stiffness. The housing 700 can be configured to significantly reduce the performance degradation of the camera module 10 caused by external heat and cold air. For example, the housing 700 can be formed of a material having a low thermal conductivity to maintain a constant internal temperature.

[0088] The substrate 900 can provide a mounting space for various components required for the operation of the camera module 10. For example, an image sensor 910, power terminals 920, connection terminals 930, passive devices, etc. can be mounted on the substrate 900. The substrate 900 can be configured in multiple numbers. For example, the substrate 900 can include a first substrate 902 and a second substrate 904. However, the number of substrates 900 is not limited to two. For example, the number of substrates 900 can be one, or three or more.

[0089] The image sensor 910 is disposed on the first substrate 902 and is configured to convert an optical signal into an electrical signal. The power terminals 920 are electrically connected to the energy generation unit 300 and can supply the current required for the operation of the energy generation unit 300. The power terminals 920 can be disposed on the first substrate 902 or the second substrate 904. The connection terminals 930 are disposed on the second substrate 904 and can achieve an electrical connection between the camera module 10 and an external device.

[0090] The camera module 10 configured as described above can be configured in such a form that the sides and the bottom are sealed by the housing 700, and the top is sealed by the lens barrel bracket 400 and the cover member 500, as Figure 2 shown. However, the front lens L1 can be set to protrude slightly upward from the lens barrel bracket 400 to ensure a wide viewing angle. However, the front lens L1 does not have to protrude upward from the lens barrel bracket 400.

[0091] The camera module 10 can be configured to prevent the internal penetration of external air and foreign matters. For example, as described above, the second airtight member 620 and the third airtight member 630 are disposed on the coupling portions of the front lens L1 and the cover member 500 and the coupling portions of the lens barrel bracket 400 and the cover member 500 to prevent the intrusion and penetration of external air and foreign matters.

[0092] Reference will be made to Figure 3 andFigure 4 Describe the internal structure and usage example of the camera module 10.

[0093] The camera module 10 is configured to protect the main components from external impacts. For example, the first lens barrel 100, the second lens barrel 200, the energy generation unit 300, and the barrel bracket 400, which are the main components of the camera module 10, can be accommodated in the housing 700 to prevent direct external impacts.

[0094] The camera module 10 can be configured to facilitate assembly and disassembly. For example, the assembly of the camera module 10 can be performed by inserting the first lens barrel 100, the second lens barrel 200, the energy generation unit 300, the barrel bracket 400, etc. into the housing 700 in a loading manner in a predetermined order. Specifically, the substrate 900, the barrel bracket 400, the first lens barrel 100, the energy generation unit 300, the second lens barrel 200, the front lens L1, and the cover member 500 can be sequentially assembled inside the housing 700.

[0095] The camera module 10 can be configured such that the relative positions are aligned by the tight connection between the components. For example, the position of the first lens barrel 100 in the housing 700 can be fixed by being connected to the barrel bracket 400. As another example, the position of the second lens barrel 200 can be fixed by being connected to the first lens barrel 100. As another example, the position of the energy generation unit 300 can be fixed by contacting the first lens barrel 100, the second lens barrel 200, and the barrel bracket 400. As another example, the position of the front lens L1 can be aligned and fixed by contacting and connecting to the second lens barrel 200 and the cover member 500.

[0096] As described above, in the camera module 10 according to this example, a separate (optical axis) alignment process can be omitted because the adjacent components are organized and combined and contact each other, and thus their relative positions are aligned and fixed.

[0097] The camera module 10 according to this example can be configured to remove frost, raindrops, etc. formed on the front lens L1. For example, the camera module 10 can keep the surface of the front lens L1 in a constant state through the energy generation unit 300, which will be described below with reference to Figure 4 as follows.

[0098] The energy generation unit 300 can generate heat at a constant temperature. For example, the energy generation unit 300 can generate heat at a temperature of 40 to 60 degrees Celsius (°C). However, the heating temperature of the energy generation unit 300 is not limited to 40 to 60 degrees Celsius. For example, the heating temperature of the energy generation unit 300 can also be adjusted to 60 degrees Celsius or higher (e.g., 100 degrees Celsius or higher).

[0099] The energy generation unit 300 can heat the adjacent components. For example, the heat of the energy generation unit 300 can be transferred to the adjacent first lens barrel 100, second lens barrel 200, and lens barrel bracket 400. However, not all of the heat of the energy generation unit 300 is transferred to the adjacent first lens barrel 100, second lens barrel 200, and lens barrel bracket 400. For example, the heat of the energy generation unit 300 can be rapidly and limitedly transferred to materials with high thermal conductivity. Specifically, the heat of the energy generation unit 300 can be transferred to the second lens barrel 200 with relatively high thermal conductivity, and can hardly be transferred to the first lens barrel 100 and lens barrel bracket 400 with relatively significantly low thermal conductivity.

[0100] The heat of the energy generation unit 300 can be transferred to the second lens barrel 200 through conduction and convection. Specifically, a large amount of heat of the energy generation unit 300 can be transferred through the contact surface or non-contact surface between the energy generation unit 300 and the second lens barrel 200.

[0101] The second lens barrel 200 can be heated by the heat of the energy generation unit 300. For example, the second lens barrel 200 can be substantially heated to 40 to 60 degrees Celsius, which is the heating temperature of the energy generation unit 300. The second lens barrel 200 heated to a predetermined temperature can transfer heat to adjacent components. For example, the second lens barrel 200 can transfer heat to the adjacent first lens barrel 100, front lens L1, and cover member 500. However, not all of the heat of the second lens barrel 200 is transferred to the adjacent first lens barrel 100, front lens L1, and cover member 500. For example, the second lens barrel 200 is limited to materials with high thermal conductivity, and heat can be rapidly transferred thereto. Specifically, the heat from the second lens barrel 200 hardly transfers to the first lens barrel 100 and cover member 500 with relatively low thermal conductivity, but can only be transferred to the front lens L1. The heat transferred to the front lens L1 can be used to evaporate or remove frost and raindrops formed on the surface of the front lens L1.

[0102] Since the camera module 10 configured as described above has a structure in which the relative positions are fixed through the tight coupling and contact between components, the phenomenon of deterioration of optical performance due to external shock can be reduced.

[0103] In addition, since the camera module 10 according to this example is configured to remove frost, raindrops, etc. formed on the surface of the front lens L1, the blurred vision, image distortion, etc. caused by frost, raindrops, etc. can be significantly reduced.

[0104] Next, reference will be made to Figures 5 to 8 Describe a camera module according to another example.

[0105] The camera module 12 according to the example includes a first lens barrel 100, a second lens barrel 200, an energy generation unit 300, and a lens barrel bracket 400. In addition, the camera module 12 may further include a cover member 500, an airtight member 600, a housing 700, a protective glass 800, and a substrate 900.

[0106] The first lens barrel 100 is configured to accommodate one or more lens groups LG. For example, the first lens barrel 100 may be configured to accommodate a lens group LG including, for example, six lenses L1, L2, L3, L4, L5, and L6 disposed along the optical axis "C". However, the number of lens groups accommodated in the first lens barrel 100 is not limited to one. For example, the first lens barrel 100 may also be configured to accommodate a first lens group including two to four lenses and a second lens group including two to four lenses.

[0107] The first lens barrel 100 may be configured to maintain the lens group LG at a constant temperature. For example, the first lens barrel 100 may be formed of a material having a low thermal conductivity such that external heat or cold air does not transfer to the lens group LG accommodated therein. The first lens barrel 100 may be configured to reduce the weight of the camera module 12. For example, the first lens barrel 100 may be formed of a lightweight and impact-resistant material such as plastic. However, the material of the first lens barrel 100 is not limited to plastic.

[0108] The first lens barrel 100 may be configured to be rigidly coupled to an adjacent member. As an example, a first threaded portion 112 for coupling with the second lens barrel 200 may be formed on a part of the first lens barrel 100. As another example, a second threaded portion 114 for coupling with the lens barrel bracket 400 may be formed on another part of the first lens barrel 100. The first threaded portion 112 and the second threaded portion 114 may be formed on the outer peripheral surface of the first lens barrel 100, respectively. For example, the first threaded portion 112 may be formed on the upper outer peripheral surface of the first lens barrel 100, and the second threaded portion 114 may be formed on the lower outer peripheral surface of the first lens barrel 100. The first threaded portion 112 and the second threaded portion 114 may be configured to define the coupling positions between the first lens barrel 100 and the second lens barrel 200 and the lens barrel bracket 400. For example, the first threaded portion 112 and the second threaded portion 114 may be formed to have different sizes. Specifically, the second lens barrel 200 is restrictedly coupled to the first threaded portion 112 of the first lens barrel 100, and the lens barrel bracket 400 is restrictedly coupled to the second threaded portion 114 of the first lens barrel 100. Accordingly, the first lens barrel 100 according to this example can significantly reduce the phenomenon of assembly failure due to changes in the coupling positions of the second lens barrel 200 and the lens barrel bracket 400.

[0109] The first lens barrel 100 may include a configuration for defining a coupling position of the second lens barrel 200. For example, a first stepped portion 122 for contacting an end portion of the second lens barrel 200 may be formed on an outer circumferential surface of the first lens barrel 100. The first stepped portion 122 may be configured not to interfere with the threaded engagement between the first lens barrel 100 and the second lens barrel 200. For example, the first stepped portion 122 may be formed between the first threaded portion 112 and the second threaded portion 114.

[0110] The second lens barrel 200 is configured to be coupled to the first lens barrel 100. For example, a threaded portion 212 fastened to the first threaded portion 112 may be formed on an inner circumferential surface of the second lens barrel 200. Accordingly, the second lens barrel 200 may be firmly coupled to the first lens barrel 100 by fastening between the first threaded portion 112 and the threaded portion 212.

[0111] The second lens barrel 200 may be configured to accommodate the protective glass 800. For example, the second lens barrel 200 may accommodate the protective glass 800 in the internal space 202. The protective glass 800 may be disposed on the object side of the lens group LG. The protective glass 800 may be disposed closest to the object side in the camera module 12. The protective glass 800 may be configured not to affect the optical performance of the camera module 12. For example, the protective glass 800 may not have a refractive power.

[0112] The second lens barrel 200 may be configured to contact the protective glass 800. For example, the second lens barrel 200 may contact an edge of the protective glass 800.

[0113] The second lens barrel 200 may be configured to absorb heat energy generated from the energy generating unit 300. For example, the second lens barrel 200 may be formed of a material having a relatively high specific heat to absorb a large amount of heat energy. The second lens barrel 200 may be configured to transfer the absorbed heat energy to the protective glass 800. For example, the second lens barrel 200 may be formed of a material having a high thermal conductivity. Specifically, the second lens barrel 200 may be formed of a metal material. However, the material of the second lens barrel 200 is not limited to a metal. The second lens barrel 200 may have a higher thermal conductivity than that of adjacent elements. For example, the second lens barrel 200 may be formed of a material having a higher thermal conductivity than that of the first lens barrel 100 and the lens barrel bracket 400.

[0114] The second lens barrel 200 can be configured to contact the energy generating unit 300. Specifically, the second lens barrel 200 can be configured to contact the energy generating unit 300 in a state where the second lens barrel 200 is coupled to the first lens barrel 100. The second lens barrel 200 can include an extension portion 230 that extends downward (in the direction of the image sensor). The extension portion 230 can be configured to contact the energy generating unit 300. For example, when the second lens barrel 200 is coupled to the first lens barrel 100, the extension portion 230 can contact the energy generating unit 300. The second lens barrel 200 can be configured to contact the energy generating unit 300 more closely than the first lens barrel 100. For example, the distance from the inner surface 312 of the energy generating unit 300 to the outer peripheral surface of the extension portion 230 can be less than the distance from the inner surface 312 of the energy generating unit 300 to the outer peripheral surface of the first lens barrel 100. However, the distance from the inner surface 312 of the energy generating unit 300 to the outer peripheral surface of the extension portion 230 does not have to be less than the distance from the inner surface 312 of the energy generating unit 300 to the outer peripheral surface of the first lens barrel 100. For example, the distance from the inner surface 312 of the energy generating unit 300 to the outer peripheral surface of the extension portion 230 can be substantially the same as the distance from the inner surface 312 of the energy generating unit 300 to the outer peripheral surface of the first lens barrel 100.

[0115] The energy generating unit 300 can be configured to generate thermal energy for heating an adjacent member. For example, the energy generating unit 300 can include a resistor configured to convert electrical energy into thermal energy. As another example, the energy generating unit 300 can be configured in the form of a PTC heater that is configured to dissipate heat at a constant temperature. As another example, the energy generating unit 300 can include a vibration device configured to generate thermal energy by vibration. However, the shape of the energy generating unit 300 is not limited to the types listed above.

[0116] The energy generating unit 300 according to this example can include a heating member 310, a first electrode member 320, and a second electrode member 330.

[0117] The heating member 310 can be configured to convert electrical energy into thermal energy. For example, the heating member 310 can be formed of a material such as ceramics having a high resistance. However, the material of the heating member 310 is not limited to ceramics. The heating member 310 can be formed in an annular shape with one side open. The heating member 310 can be configured to be elastically deformable. For example, the distance G between the two ends of the heating member 310 can be enlarged or reduced according to the elastic deformation of the heating member 310.

[0118] The heating member 310 can be configured to be in close contact with the second lens barrel 200. For example, the inner diameter Di of the heating member 310 can be substantially the same as the outer diameter Db2 of the extension portion 230 of the second lens barrel 200. However, the inner diameter Di of the heating member 310 does not have to be the same as the outer diameter Db2 of the extension portion 230 of the second lens barrel 200. For example, the inner diameter Di of the heating member 310 can be smaller than the outer diameter Db2 of the extension portion 230 of the second lens barrel 200. The inner diameter Di of the heating member 310 can be changed by elastic deformation of the heating member 310. For example, the inner diameter Di of the heating member 310 is smaller than the outer diameter Db2 of the extension portion 230 of the second lens barrel 200. However, when the heating member 310 is coupled to the extension portion 230 of the second lens barrel 200, the inner diameter Di of the heating member 310 can be elastically deformed to have substantially the same dimension as the outer diameter Db2 of the extension portion 230. As described above, since the elastically deformable heating member 310 can be in close contact with the second lens barrel 200, the thermal energy contained in the heating member 310 can be quickly transferred to the second lens barrel 200.

[0119] The first electrode member 320 and the second electrode member 330 can be configured to supply current to the heating member 310. For example, the first electrode member 320 and the second electrode member 330 are electrically connected to the power supply terminal 920 of the substrate 900 to supply the current supplied from the power supply terminal 920 to the heating member 310. The first electrode member 320 and the second electrode member 330 can be disposed on the heating member 310. For example, the first electrode member 320 can be disposed above the heating member 310, and the second electrode member 330 can be disposed below the heating member 310. However, the arrangement positions of the first electrode member 320 and the second electrode member 330 are not limited to above and below the heating member 310. For example, the first electrode member 320 and the second electrode member 330 can also be disposed on the inner peripheral surface and the outer peripheral surface of the heating member 310 within a range that does not interfere with the contact between the heating member 310 and the second lens barrel 200. The first electrode member 320 and the second electrode member 330 can be configured to be connected to the connection wire 340 (see Figure 3 ). For example, the terminals 322 and 332 to be connected to the connection wire 340 can be formed at one end of the first electrode member 320 and one end of the second electrode member 330. The terminals 322 and 332 can be formed to be bent toward one side. For example, the terminals 322 and 332 can be configured to be bent in the longitudinal direction of the camera module 12. However, the terminals 322 and 332 do not have to be configured in a bent shape.

[0120] The lens barrel holder 400 can be configured to accommodate the first lens barrel 100. For example, the first lens barrel 100 can be accommodated in the internal space 402 of the lens barrel holder 400. The lens barrel holder 400 can be configured to be coupled to the first lens barrel 100. For example, a threaded portion 414 for fastening to the second threaded portion 114 of the first lens barrel 100 can be formed in the internal space 402 of the lens barrel holder 400.

[0121] The lens barrel holder 400 can be configured to be able to take out and insert the connection line 340. For example, a hole 404 can be formed on one side of the lens barrel holder 400 to allow the connection line 340 to be drawn out and inserted therein.

[0122] The lens barrel holder 400 can be configured to be coupled to the substrate 900. For example, the lens barrel holder 400 can be coupled to the substrate 900 through a plurality of leg members 406 extending downward. The lens barrel holder 400 can be configured such that the distance from the end of the first lens barrel 100 to the substrate 900 or the image sensor 910 is sufficiently formed. For example, the leg members 406 of the lens barrel holder 400 can extend in such a way as to have a significant length Lh such that the distance from the end of the first lens barrel 100 to the image sensor 910 is sufficiently formed.

[0123] The cover member 500 can be configured to be coupled to the second lens barrel 200. For example, the cover member 500 can be firmly coupled to the outer peripheral surface of the second lens barrel 200 by methods such as press fitting and screw fastening.

[0124] The cover member 500 can be configured to prevent the protective glass 800 from separating. For example, the cover member 500 can be coupled to the second lens barrel 200 while pressing the edge of the protective glass 800. The cover member 500 can have an opening 510 that allows light to enter. The diameter EP of the opening 510 can have a predetermined size relationship with the size of the protective glass 800. For example, the diameter EP of the opening 510 can be smaller than the diameter GD of the protective glass 800.

[0125] The cover member 500 can be configured to significantly reduce the penetration of external heat or cold air. For example, the cover member 500 can be formed of a material having a low thermal conductivity. The cover member 500 can be configured to significantly reduce the phenomenon of heat loss of the second lens barrel 200 to the outside. For example, the cover member 500 can be formed of a material that can keep warm.

[0126] The airtight member 600 can be configured to prevent external air or foreign objects from invading or penetrating the camera module 12. For example, the airtight member 600 can be configured to prevent external air or foreign objects from invading through the connection portion between members. The airtight member 600 can include a first airtight member 610, a second airtight member 620, and a third airtight member 630.

[0127] The first airtight member 610 may be disposed between the first lens barrel 100 and the second lens barrel 200. For example, as Figure 3 shown, the first airtight member 610 is disposed between the outer peripheral surface of the first lens barrel 100 and the inner peripheral surface of the second lens barrel 200 to prevent foreign matter from flowing in through the connection portion between the first lens barrel 100 and the second lens barrel 200.

[0128] The second airtight member 620 may be disposed between the protective glass 800 and the cover member 500. For example, the second airtight member 620 is disposed between the protective glass 800 and the cover member 500 to prevent foreign matter and external air from flowing in through the contact portion or gap between the protective glass 800 and the cover member 500.

[0129] The third airtight member 630 may be disposed between the lens barrel bracket 400 and the cover member 500. For example, the third airtight member 630 is disposed between the upper stepped portion 420 of the lens barrel bracket 400 and the lower extension portion 520 of the cover member 500 to prevent foreign matter and external air from flowing in through the contact portion or gap between the lens barrel bracket 400 and the cover member 500.

[0130] The camera module 12 may further include a gap maintaining member 660 as needed. The gap maintaining member 660 may be disposed between the protective glass 800 and the lens group LG to maintain a constant distance between the protective glass 800 and the lens group LG. In addition, the gap maintaining member 660 may be configured to prevent or significantly reduce heat transfer between the protective glass 800 and the lens group LG. For example, the gap maintaining member 660 may be formed of a material having low thermal conductivity.

[0131] The housing 700 may be configured to accommodate the first lens barrel 100, the second lens barrel 200, the energy generating unit 300, the lens barrel bracket 400, and the substrate 900 therein. For example, an internal space 702 capable of accommodating the above components may be formed in the housing 700. The internal space 702 may be open to one side (upper side) of the housing 700.

[0132] The housing 700 may be configured to be coupled to the lens barrel bracket 400. For example, the housing 700 may be coupled to the flange 430 of the lens barrel bracket 400 through protrusions and grooves, bolts or screws, adhesives, etc. The housing 700 may include a configuration for enabling connection between the substrate 900 or components mounted on the substrate 900 and an external device. For example, a connector 710 opening inward may be formed on one side of the housing 700.

[0133] The housing 700 can be configured to protect internal components from external impacts. For example, the housing 700 can be formed of a material having a predetermined strength and stiffness. The housing 700 can be configured to significantly reduce the phenomenon that the performance of the camera module 12 deteriorates due to external hot and cold air. For example, the housing 700 can be formed of a material having a low thermal conductivity to maintain a constant internal temperature.

[0134] The substrate 900 can provide an installation space for various components required for the operation of the camera module 12. For example, the image sensor 910, the power terminal 920, the connection terminal 930, passive devices, etc. can be mounted on the substrate 900. The substrate 900 can be configured in multiple. For example, the substrate 900 can include a first substrate 902 and a second substrate 904. However, the number of substrates 900 is not limited to two. For example, the substrate 900 can also include one substrate, or three or more substrates.

[0135] The image sensor 910 is disposed on the first substrate 902 and is configured to convert an optical signal into an electrical signal. The power terminal 920 is electrically connected to the energy generation unit 300 and can supply the current required for the operation of the energy generation unit 300. The power terminal 920 can be provided on the first substrate 902 or the second substrate 904. The connection terminal 930 is provided on the second substrate 904 and can achieve an electrical connection between the camera module 12 and an external device.

[0136] The camera module 12 configured as above is configured in such a form that the sides and the bottom are sealed by the housing 700, and the top is sealed by the lens barrel bracket 400 and the cover member 500, as Figure 6 shown.

[0137] The camera module 12 can be configured to prevent the internal penetration of external air and foreign matters. For example, as described above, the joint portions of the protective glass 800 and the cover member 500 and the joint portions of the lens barrel bracket 400 and the cover member 500 can be provided with a second airtight member 620 and a third airtight member 630 provided thereon to prevent the intrusion and penetration of external air and foreign matters.

[0138] Reference will be made to Figure 7 and Figure 8 to describe the internal structure and usage examples of the camera module 12.

[0139] The camera module 12 is configured to protect the main components from external impacts. The main components of the camera module 12, such as the first lens barrel 100 and the second lens barrel 200, the energy generation unit 300, and the lens barrel bracket 400, can be accommodated in the housing 700 to prevent direct external impacts.

[0140] The camera module 12 can be configured to facilitate assembly and disassembly. For example, the assembly of the camera module 12 can be performed by inserting the first lens barrel 100, the second lens barrel 200, the energy generation unit 300, the barrel bracket 400, etc. into the housing 700 in a loading manner in a predetermined order. Specifically, the substrate 900, the barrel bracket 400, the first lens barrel 100, the energy generation unit 300, the second lens barrel 200, the protective glass 800, and the cover member 500 can be assembled in sequence inside the housing 700.

[0141] The camera module 12 can be configured such that the components are organizedly coupled to each other and their relative positions can be aligned. For example, the position of the first lens barrel 100 in the housing 700 can be fixed by coupling to the barrel bracket 400. As another example, the position of the second lens barrel 200 can be fixed by coupling to the first lens barrel 100. As another example, the position of the energy generation unit 300 can be fixed by contacting the first lens barrel 100, the second lens barrel 200, and the barrel bracket 400. As another example, the position of the protective glass 800 can be fixed by contacting and coupling to the second lens barrel 200 and the cover member 500.

[0142] As described above, in the camera module 12 according to this example, a separate (optical axis) alignment process can be omitted because the adjacent components are organizedly combined and contact each other to align and fix their relative positions.

[0143] The camera module 12 according to this example can be configured to remove frost, raindrops, etc. formed on the protective glass 800. For example, the camera module 12 can keep the surface of the protective glass 800 in a constant state through the energy generation unit 300, which will be described below with reference to Figure 8 is described.

[0144] The energy generation unit 300 can generate heat at a constant temperature. For example, the energy generation unit 300 can generate heat at a temperature of 40 to 60 degrees Celsius. However, the heating temperature of the energy generation unit 300 is not limited to 40 to 60 degrees Celsius. For example, the heating temperature of the energy generation unit 300 can be adjusted to 60 degrees Celsius or higher (e.g., 100 degrees Celsius or higher).

[0145] The energy generation unit 300 can heat adjacent components. For example, the heat of the energy generation unit 300 can be transferred to the adjacent first lens barrel 100, second lens barrel 200, and lens barrel bracket 400. However, the heat of the energy generation unit 300 does not transfer to all of the adjacent first lens barrel 100, second lens barrel 200, and lens barrel bracket 400. For example, the energy generation unit 300 is limited to materials with high thermal conductivity, and heat can be quickly transferred thereto. Specifically, the heat of the energy generation unit 300 can be transferred to the second lens barrel 200 with relatively high thermal conductivity, and hardly transferred to the first lens barrel 100 and lens barrel bracket 400 with relatively significantly low thermal conductivity.

[0146] The heat of the energy generation unit 300 can be transferred to the second lens barrel 200 by conduction and convection. Specifically, a large amount of heat of the energy generation unit 300 can be transferred through the contact surface or non-contact surface between the energy generation unit 300 and the second lens barrel 200.

[0147] The second lens barrel 200 can be heated by the heat of the energy generation unit 300. For example, the second lens barrel 200 can be heated to 40 to 60 degrees Celsius, which is basically the heating temperature of the energy generation unit 300. The second lens barrel 200 heated to a predetermined temperature can transfer heat to adjacent components. For example, the second lens barrel 200 can transfer heat to the adjacent first lens barrel 100, protective glass 800, and cover member 500. However, the heat of the second lens barrel 200 does not transfer to all of the adjacent first lens barrel 100, protective glass 800, and cover member 500. For example, the heat of the second lens barrel 200 can be limitedly and quickly transferred to materials with high thermal conductivity. Specifically, the heat of the second lens barrel 200 is hardly transferred to the first lens barrel 100 and cover member 500 with relatively low thermal conductivity, and can only be transferred to the protective glass 800. The heat transferred to the protective glass 800 can be used to evaporate or remove frost, raindrops, etc. formed on the surface of the protective glass 800.

[0148] Since the camera module 12 configured as described above can remove frost, raindrops, etc. formed on the surface of the protective glass 800, visual obstacles and image distortion caused by frost, raindrops, etc. can be significantly reduced.

[0149] As described above, phenomena such as resolution deterioration caused by foreign matters and field-of-view obstacles caused by foreign matters can be prevented.

[0150] Although specific examples have been shown and described above, it will be apparent after obtaining an understanding of the present disclosure that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described in this application should be understood only in a descriptive sense and not for the purpose of limitation. The description of a feature or aspect in each example should be understood as applicable to similar features or aspects in other examples. Appropriate results can still be achieved if the described techniques are performed in a different order, and / or if the components in the described system, architecture, device, or circuit are combined in a different manner and / or replaced or supplemented by other components or their equivalents. Accordingly, the scope of the present disclosure is not limited by the specific embodiments, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in the present disclosure.

Claims

1. The camera module includes: A first lens barrel configured to receive one or more lens groups; A second lens barrel coupled to the first lens barrel and configured to support a front lens disposed on an object side of the one or more lens groups; An energy generation unit configured to contact the second lens barrel and configured to supply thermal energy to the second lens barrel; A barrel bracket coupled to the first lens barrel and configured to accommodate the energy generation unit; And A cover member configured to be coupled to an outer circumferential surface of the second lens barrel; Wherein, the second lens barrel is formed of a material having a higher thermal conductivity than that of the first lens barrel and is configured to contact the energy generation unit more closely than the first lens barrel.

2. The camera module according to claim 1, wherein, The second lens barrel is formed of a material having a higher thermal conductivity than that of the barrel bracket.

3. The camera module according to claim 1, further comprising a first airtight member disposed between the first lens barrel and the second lens barrel.

4. The camera module according to claim 1, further comprising a housing configured to be coupled to the barrel bracket.

5. In the camera module according to claim 4, the cover member is configured to press an edge of the front lens.

6. The camera module according to claim 5, further comprising a second airtight member disposed between the barrel bracket and the cover member.

7. The camera module according to claim 1, further comprising a gap maintaining member disposed between the one or more lens groups and the front lens.

8. The camera module includes: A first lens barrel configured to accommodate one or more lens groups; A second lens barrel coupled to the first lens barrel and configured to support a protective glass disposed on an object side of the one or more lens groups; An energy generation unit configured to contact the second lens barrel and configured to supply thermal energy to the protective glass; A barrel bracket coupled to the first lens barrel and configured to receive the energy generation unit; And A cover member configured to be coupled to an outer circumferential surface of the second lens barrel; Wherein, the second lens barrel is formed of a material having a higher thermal conductivity than that of the first lens barrel and is configured to contact the energy generation unit more closely than the first lens barrel.

9. The camera module according to claim 8, further comprising a first airtight member disposed on the first lens barrel and the second lens barrel.

10. In the camera module according to claim 8, the cover member is configured to press an edge of the protective glass.

11. The camera module according to claim 10, further comprising a second airtight member disposed between the barrel bracket and the cover member.

12. The camera module according to claim 8, wherein, The energy generation unit includes: A heating member; A first electrode member disposed on one side of the heating member; and A second electrode member disposed on the other side of the heating member.

13. The camera module according to claim 8, further comprising a first substrate coupled to the barrel bracket and having an image sensor mounted thereon.

14. The camera module according to claim 13 further includes a second substrate, which is electrically connected to the energy generation unit and is arranged at a certain distance from the first substrate.

15. A camera module, comprising: An energy generation unit; A front lens disposed on the optical axis; A heat transfer member disposed between the energy generation unit and the front lens; A cover member pressing against the edge of the front lens to prevent the front lens from separating, and A first lens barrel, which is disposed toward the image side of the front lens and is configured to accommodate one or more lens groups along the optical axis, wherein the heat transfer member is configured to supply heat energy to the front lens, wherein the heat transfer member has a higher thermal conductivity than the first lens barrel and is configured to contact the energy generation unit more closely than the first lens barrel.

16. The camera module according to claim 15, wherein, The front lens has a refractive power.

17. The camera module according to claim 15, wherein, The heat transfer member includes a second lens barrel coupled to the first lens barrel and is configured to support the front lens.

18. The camera module according to claim 17 further includes a lens barrel bracket for accommodating the first lens barrel, Among them, wherein the second lens barrel is formed of a material having a thermal conductivity higher than that of the lens barrel bracket.

19. The camera module according to claim 15 further includes a sealing structure disposed between the heat transfer member and the front lens.

Images