Lighting device

Abstract

A lighting device according to an embodiment of the present invention comprises: a housing in which an optical system is disposed; and a light source module irradiating light inside the housing, wherein the light source module extends outside of the housing and includes: a first panel unit having one side coupled to a first surface of the housing; a second panel unit having one side coupled to a second surface of the housing; and a third panel unit having one side coupled to a third surface of the housing, wherein the third surface is disposed to at least partially overlap the optical system in a first direction parallel to the optical axis of the optical system, and the first panel unit includes a 1-1 region disposed on the housing and a 1-2 region disposed outside the housing, the second panel unit includes a 2-1 region disposed on the housing and a 2-2 region disposed outside the housing, and the 1-1 region and the 2-1 region overlap each other in a third direction perpendicular to the first direction and a second direction, which is the direction from one of the first surface or the second surface toward the other.

Description

lighting device

[0001] The present invention relates to a lighting device.

[0002] Conventional multi-channel optical engine devices can output images such as those on projectors or displays by mixing red, green, and blue light to obtain white and bright color images. These multi-channel optical engine devices are frequently utilized in the aforementioned projectors, and are increasingly being applied in fields such as Augmented Reality (AR) and Virtual Reality (VR), which have seen significant development in recent years.

[0003] However, projectors used in the aforementioned fields are manufactured in ultra-compact sizes, and problems caused by high heat generation may occur due to the characteristics of the optical engine device that emits light. In particular, because they are manufactured in ultra-compact sizes, heat becomes concentrated in a small space, which can lead to various issues, such as device defects or a degradation in the quality of the transmitted image.

[0004] Even if various heat dissipation structures are applied to prevent this, the overall volume of the projector increases, making it unsuitable for the ultra-compact sizes required for VR and AR applications, and there are issues such as reduced heat dissipation performance due to the ultra-compact size.

[0005] The present invention is an invention devised to solve the problems of the aforementioned prior art, and aims to improve the heat dissipation performance of a lighting device.

[0006] The problems that the present invention aims to solve are not limited to those mentioned above, and other problems not mentioned herein will be clearly understood by those skilled in the art from the description below.

[0007] A lighting device according to an embodiment of the present invention for achieving the above-described purpose comprises a housing having an optical system disposed on its inner side and a light source module that irradiates light on the inner side of the housing, wherein the light source module includes a first panel part extending to the outer side of the housing and having one side coupled to a first surface of the housing, a second panel part having one side coupled to a second surface of the housing, and a third panel part having one side coupled to a third surface of the housing, wherein the third surface is disposed such that at least a portion overlaps with the optical system in a first direction parallel to the optical axis of the optical system, wherein the first panel part includes a first-1 area disposed on the housing and a first-2 area disposed on the outer side of the housing, and the second panel part includes a second-1 area disposed on the housing and a second-1 area disposed on the outer side of the housing, wherein the first-1 area and the second-1 area are in a third direction perpendicular to the first direction and a second direction toward the other from either the first surface or the second surface. It overlaps.

[0008] According to the present embodiment, the housing includes a fourth surface and a fifth surface disposed between the first surface and the second surface in the first direction, wherein the first-1 area and the second-1 area are disposed on the fourth surface, and the first panel part, the second panel part and the third panel part may not be disposed on the fifth surface.

[0009] According to the present embodiment, the first panel part may include a first board including a light source disposed on the housing, a first extension part extending from the first board, and a first coupling part disposed on the outside of the housing; the second panel part may include a second board including a light source disposed on the housing, a second extension part extending from the second board, and a second coupling part disposed on the outside of the housing; and the third panel part may include a third board including a light source disposed on the housing, a third extension part extending from the third board, and a third coupling part disposed on the outside of the housing.

[0010] According to the present embodiment, the first coupling part, the second coupling part, and the third coupling part can be coupled to each other on the outside of the housing.

[0011] According to the present embodiment, the third extension may include a third-1 region that overlaps a part of the first extension in the third direction and a third-2 region that overlaps a part of the second extension in the third direction.

[0012] According to the present embodiment, the first extension and the second extension may not overlap each other in the third direction.

[0013] According to the present embodiment, the third coupling part may include a 4-1 region coupled to the first coupling part and a 4-2 region coupled to the second coupling part.

[0014] According to the present embodiment, the first surface may include a first placement area coupled to the first board and a first recessed area that is recessed into the inside of the housing from the first placement area, and the second surface may include a second placement area coupled to the second board and a second recessed area that is recessed into the inside of the housing from the second placement area.

[0015] According to the present embodiment, the device further includes an extension portion disposed between the third surface and the third board in the third direction, wherein the extension portion may include a third placement area coupled to the third board and a third recessed area recessed into the interior of the housing from the third placement area.

[0016] According to the present embodiment, the extension part includes a first side and a second side spaced apart in the second direction, wherein a portion of the first board is disposed in the second direction on the first side and a portion of the second board is disposed in the second direction on the second side.

[0017] According to the present embodiment, an adhesive may be disposed between the first placement area and the first board, between the second placement area and the second board, between the third placement area and the third board, between the first side and the first board, and between the second side and the second board.

[0018] According to the present embodiment, a first heat dissipation member may be disposed on the outer surface of the first board in the second direction, a second heat dissipation member may be disposed on the outer surface of the second board in the second direction, and a third heat dissipation member may be disposed on the outer surface of the third board in the first direction.

[0019] According to the present embodiment, the housing includes a sixth surface disposed opposite to the third surface and the first direction, and a barrel portion disposed on the sixth surface, and the barrel portion may be disposed eccentrically at the center of the housing in the third direction.

[0020] A lighting device according to an embodiment of the present invention for solving the above problem may have the effect of improving the heat dissipation performance of the lighting device.

[0021] In addition, since a control unit is provided in the space formed by the difference in length, heat generated by the control unit can be efficiently released, and the lighting device can be miniaturized.

[0022] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims.

[0023] In addition, the effects of the present invention may be described in more detail in the detailed description of the present invention and are not necessarily limited to those presented above.

[0024] The summary described above, as well as the detailed description of the preferred embodiments of the present application described below, will be better understood when read in conjunction with the accompanying drawings.

[0025] Preferred embodiments are illustrated in the drawings for the purpose of illustrating the present invention.

[0026] However, it should be understood that the present application is not limited to the exact arrangement and means depicted.

[0027] FIG. 1 is a drawing illustrated for the general explanation of a lighting device according to an embodiment of the present invention;

[0028] FIG. 2 is a drawing illustrating a first panel portion of a lighting device according to an embodiment of the present invention;

[0029] FIG. 3 is a drawing illustrating a second panel section of a lighting device according to an embodiment of the present invention;

[0030] FIG. 4 is a drawing illustrating a third panel section of a lighting device according to an embodiment of the present invention;

[0031] FIG. 5 is a drawing illustrating the overlapping area of ​​the first panel section and the second panel section of a lighting device according to an embodiment of the present invention;

[0032] FIG. 6 is a drawing illustrating the first panel section, the third panel section, and the overlapping area of ​​the first panel section and the third panel section of a lighting device according to an embodiment of the present invention;

[0033] FIG. 7 is a drawing illustrating a first aspect of a lighting device according to an embodiment of the present invention;

[0034] FIG. 8 is a drawing illustrating a second side of a lighting device according to an embodiment of the present invention;

[0035] FIG. 9 is a drawing illustrating an extension of a lighting device according to an embodiment of the present invention;

[0036] FIG. 10 is a drawing illustrating the fifth surface and heat dissipation member of a lighting device according to an embodiment of the present invention; and

[0037] FIG. 11 is a drawing illustrated to explain the comparison between the center of the barrel portion and the center of the housing of a lighting device according to an embodiment of the present invention.

[0038] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. In describing the present invention, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions may obscure the essence of the present invention.

[0039] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0040] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to indicate the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0041] Furthermore, throughout the specification, when the term "connected" is used, it does not mean only that two or more components are directly connected, but may also mean that two or more components are indirectly connected through other components, that they are connected not only physically but also electrically, or that they are a single unit although referred to by different names depending on their location or function.

[0042] Furthermore, when described as being formed or placed on the “top or bottom” of each component, “top or bottom” includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as “top or bottom,” it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0043] Furthermore, when describing objects as "identical" or "similar" based on numerically or geometrically comparable properties such as length, inner diameter, diameter, or area, this may imply that there is a margin of error. For example, if it is stated that the lengths of components A and B are identical, it may be advisable to interpret this to mean that the length of B falls within the margin of error of the length of A. This takes into account the margin of error that occurs during the injection molding and manufacturing processes; since this is a matter that can occur physically and is self-evident, it is advisable to understand the description as "identical" or "similar" by considering the margin of error as described above. In this case, the margin of error may be within the range of -5% to +5% of the mentioned numerical value or shape, but this is merely an example of the margin of error and may not necessarily be limited to the stated range.

[0044] A preferred embodiment of the present invention, in which the objective of the present invention can be specifically realized, will be described below with reference to the attached FIGS. 1 to 13.

[0045] First, a lighting device according to an embodiment of the present invention may include a housing (1000), a light source module (2000), and a heat dissipation member (3000) as shown in FIG. 1.

[0046] Although the configuration, function, and arrangement will be described in more detail through the following description, the first direction, second direction, and third direction will be described before describing the lighting device according to the embodiment of the present invention. The first direction is a direction parallel to the optical axis of the optical system placed within the housing (1000), and may refer to a direction from the upper side to the lower side and a direction from the lower side to the upper side with respect to FIG. 1. In addition, the second direction is perpendicular to the first direction and may refer to a direction from the first board (2110) toward the second board (2210) or from the second board (2210) toward the first board (2110), and may refer to a direction from the lower left to the upper right and a direction from the upper right to the lower left with respect to FIG. 1. The third direction is perpendicular to the first and second directions and may mean a direction toward the fourth surface (1400) from the fifth surface (1500) or toward the fifth surface (1500) from the fourth surface (1400), and may mean a direction toward the upper left to the lower right and a direction toward the lower right to the upper left with respect to FIG. 1. The first, second, and third directions described above can be more clearly understood through the directions indicated in each drawing.

[0047] Based on the above description, an illumination device according to an embodiment of the present invention is described as follows: a housing (1000) forms an exterior, an optical system is disposed on the inside, and a barrel portion (B) may be disposed on the upper surface of the housing (1000), more specifically on the sixth surface (1600) of the housing (1000). Here, the optical system may include a lens for a first light source (2111) of a first panel portion (2100) to be described later, a lens for a second light source (2211) of a second panel portion (2200), a lens for a third light source (2311) of a third panel portion (2300), and a prism that changes the optical path of the first light of the first light source (2111), the second light of the second light source (2211), and the third light of the third light source (2311) along the optical axis. However, this is merely one example of a lighting device according to an embodiment of the present invention and should not be interpreted as being limited to what is stated.

[0048] At this time, the housing (1000) may have at least one of the length in the first direction, the length in the second direction, and the length in the third direction, and the housing (1000) according to an embodiment of the present invention may have a different length in the third direction. More specifically, the length in the third direction is formed to be relatively longer, and the optical system disposed inside the housing (1000) may be disposed biased to one side from the center (HC) of the housing (1000). This will be explained in more detail through the drawings to be described later.

[0049] Meanwhile, the light source module (2000) can irradiate light toward the inside of the housing (1000). At this time, the light source module (2000) may include a first panel part (2100) with one side coupled to a first surface (1100) of the housing (1000), a second panel part (2200) with one side coupled to a second surface (1200) of the housing (1000), and a third panel part (2300) with one side coupled to a third surface (1300) of the housing (1000).

[0050] Additionally, the heat dissipation member (3000) may include a first heat dissipation member (3100) disposed on the outer surface of the first board (2110) of the first panel part (2100) in the second direction, a second heat dissipation member (3200) disposed on the outer surface of the second board (2210) of the second panel part (2200) in the second direction, and a second heat dissipation member (3200) disposed on the outer surface of the third board (2310) of the third panel part (2300) in the first direction.

[0051] At this time, each of the above-described components will be explained in more detail through the drawings to be described later.

[0052] First, to explain the first panel section (2100) according to an embodiment of the present invention, refer to FIG. 2. As shown in FIG. 2, the first panel section (2100) may include a first board (2110) disposed on a first surface (1100), a first extension section (2120) extending from the first board (2110), and a first coupling section (2130) disposed at the end of the first extension section (2120).

[0053] Here, the first extension portion (2120) may include a first-1 region (2121) that is partially disposed on the first surface (1100) and is disposed on the fourth surface (1400), and a first-2 region (2122) that extends from the first-1 region (2121) to the outside of the housing (1000). That is, the first-1 region (2121) is disposed on the housing (1000), and the first-2 region (2122) may be disposed on the outside of the housing (1000). In addition, the first coupling portion (2130) is disposed in the first-2 region (2122), and accordingly, the first coupling portion (2130) may be disposed on the outside of the housing (1000).

[0054] Additionally, the first-2 region (2122) extends in the first direction from the first-1 region (2121) with reference to FIG. 2. Since it extends outward from the housing (1000) in the first direction parallel to the optical axis, it may not overlap with the housing (1000) in the second or third direction. Furthermore, the first-2 region (2122) extends in the first direction from the first-1 region (2121) and may extend in the second direction from the region adjacent to the second surface (1200). This prevents it from overlapping with the second extension part (2220) of the second panel part (2200) to be described later, thereby allowing heat generated between them to be easily discharged to the outside. That is, since the first extension part (2120) has a first-2 region (2122) that extends outward, excluding a portion that is placed in the first-1 region (2121) and the first surface (1100), even if it has a very small size, it does not wrap around the entire housing (1000), so heat dissipation performance can be effectively improved.

[0055] Additionally, the first board (2110) may be fixed to the first surface (1100) through an adhesive (E), wherein the adhesive (E) may be epoxy, but is not necessarily limited to that mentioned.

[0056] Meanwhile, referring to FIG. 3 to explain the second panel section (2200) according to an embodiment of the present invention, as shown in FIG. 3, the second panel section (2200) may include a second board (2210) disposed on a second surface (1200), a second extension section (2220) extending from the second board (2210), and a second coupling section (2230) disposed at the end of the second extension section (2220). At this time, the second surface (1200) may refer to a surface of the housing (1000) disposed opposite to the first surface (1100) in the second direction. That is, the first surface (1100) and the second surface (1200) are surfaces facing each other in the second direction, and accordingly, the first board (2110) and the second board (2210) may be disposed facing each other in the second direction.

[0057] Here, the second extension portion (2220) may include a second-1 area (2221) that is partially disposed on the second surface (1200) and is disposed on the fourth surface (1400), and a second-2 area (2222) that extends from the second-1 area (2221) to the outside of the housing (1000). That is, the second-1 area (2221) is disposed on the housing (1000), and the second-2 area (2222) may be disposed on the outside of the housing (1000). In addition, the second coupling portion (2230) is disposed in the second-2 area (2222), and accordingly, the second coupling portion (2230) may be disposed on the outside of the housing (1000).

[0058] Additionally, the second-2 region (2222) extends in the first direction from the second-1 region (2221) with reference to FIG. 3, and since it extends outward from the housing (1000) in the first direction parallel to the optical axis, it may not overlap with the housing (1000) in the second or third direction. Furthermore, the second-2 region (2222) extends from the second-1 region (2221) in the first direction and may extend in the second direction from the region adjacent to the first surface (1100).

[0059] As described above, this allows the first-2 region (2122) of the first extension part (2120) and the second-2 region (2222) of the second extension part (2220) to be easily discharged to the outside by ensuring that they do not overlap in the third direction. That is, since the second-2 region (2222) of the second extension part (2220) extends outward, excluding the second-1 region (2221) and a portion placed on the second surface (1200), it does not enclose the entire housing (1000) even if it has a very small size, thereby effectively improving heat dissipation performance.

[0060] Additionally, the second board (2210) may be fixed to the second surface (1200) through an adhesive (E), wherein the adhesive (E) may be epoxy, but is not necessarily limited to that mentioned.

[0061] At this time, referring to FIGS. 2 and 3, to explain in detail the comparison between the first-2 region (2122) and the second-2 region (2222), the first-1 region (2121) and the second-1 region (2221) overlap each other in the third direction, and the first-2 region (2122) extends from the first-1 region (2121) to the outside of the housing (1000) in the first direction, extending from the lower part of the first-1 region (2121) adjacent to the second surface (1200), and the second-2 region (2222) extends from the second-1 region (2221) to the outside of the housing (1000) in the first direction, extending from the lower part of the second-1 region (2221) adjacent to the first surface (1100), so that the first-2 region (2122) and the second-2 region (2222) overlap each other in the third direction. It may not overlap.

[0062] Here, if the lower portion of the 1-1 area (2121) is defined as a 1-1 section where the 1-2 area (2122) is not formed and a 1-2 section where the 1-2 area (2122) is formed, and the lower portion of the 2-1 area (2221) is defined as a 2-1 section where the 2-2 area (2222) is not formed and a 2-2 section where the 2-2 area (2222) is formed, then the 1-1 section overlaps with the 2-2 section in the third direction, and the 1-2 section overlaps with the 2-1 section in the third direction. That is, the 1 extension portion (2120) and the 2 extension portion (2220) are arranged to overlap in the third direction only on the 4th surface (1400), and may not overlap each other in the third direction on the outside of the housing (1000).

[0063] Meanwhile, before describing the third panel section (2300) according to the embodiment of the present invention, the extension section (1700) according to the embodiment of the present invention will be described first. As shown in FIG. 4, the extension section (1700) may be placed on the third surface (1300) which is positioned opposite to the first direction on the sixth surface (1600) of the housing (1000) where the barrel section (B) is placed, and the third panel section (2300) may be fixed to the extension section (1700). Here, the extension section (1700) is placed to secure an area for the adhesive (E) for the first board (2110) and the second board (2210) to be combined, and this will be explained in more detail through the drawings to be described later.

[0064] Here, the third panel section (2300) may include a third board (2310) disposed on the third surface (1300) or alternatively on the extension section (1700), a third extension section (2320) extending from the third board (2310), and a third coupling section (2330) disposed at the end of the third extension section (2320). Although it has been described that the third board (2310) is disposed on the third surface (1300), more specifically, it is disposed on the extension section (1700). The placement of the third board (2310) on the third surface (1300) is merely another example of a lighting device according to an embodiment of the present invention, and it is preferable to interpret the placement on the extension section (1700) and the placement on the third surface (1300) as respective embodiments of the present invention, and it may not be desirable to understand them as different inventions. Accordingly, the third board (2310) can be fixed to the extension (1700) with an adhesive (E), wherein the adhesive (E) may be epoxy, but is not necessarily limited to that mentioned.

[0065] As described above, the third board (2310) according to an embodiment of the present invention is positioned on the extension portion (1700) and is positioned to face the third surface (1300) with the extension portion (1700) in between. The third extension portion (2320) may extend from the third board (2310), with a portion positioned on the extension portion (1700) and a portion extending to the outside of the housing (1000) in the first direction. Additionally, the third coupling portion (2330) may be positioned at the end of the third extension portion (2320) and positioned to the outside of the housing (1000). Here, the third extension (2320) may include a third-1 region (2321) that overlaps with the first extension (2120) in the third direction, more specifically with the first-2 region (2122), and a third-2 region (2322) that overlaps with the second extension (2220) in the third direction, more specifically with the second-2 region (2222).

[0066] At this time, the third coupling part (2330) may include a third-1 coupling part (2331) coupled to the first coupling part (2130) and a third-2 coupling part (2333) coupled to the second coupling part (2230). Alternatively, the third coupling part (2330) may include a fourth-1 region (2332) where the third-1 coupling part (2331) and the first coupling part (2130) are coupled, and a fourth-2 region (2334) where the third-2 coupling part (2333) and the second coupling part (2230) are coupled.

[0067] That is, the 4-1 area (2332) is an area where the 3-1 coupling part (2331) is positioned and coupled with the 1 coupling part (2130), and the 4-2 area (2334) may be an area where the 3-2 coupling part (2333) is positioned and coupled with the 2 coupling part (2230). This will be explained in more detail through the drawings to be described later.

[0068] Meanwhile, as illustrated in FIG. 4, a recessed space (1410) that is recessed inward in the third direction is formed in the fourth surface (1400), and a pair may be arranged with one wall portion (1420) in between in the second direction. This has the function of rapidly releasing heat generated as the first-1 region (2121) and the second-1 region (2221) overlap on the fourth surface (1400) to the outside, thereby ensuring high heat dissipation performance.

[0069] However, to prevent the rigidity of the first surface (1100) and the second surface (1200) from decreasing as a pair of recessed spaces (1410) are arranged with a wall portion (1420) in between in the second direction, a reinforcing member may be placed within the aforementioned recessed space (1410). This is an example of a lighting device according to an embodiment of the present invention and is not limited to what has been mentioned; however, as described, since heat dissipation performance can be improved as a pair of recessed spaces (1410) are arranged with a wall portion (1420) in between in the second direction, it may be preferable to form a recessed space (1410) on the fourth surface (1400).

[0070] In addition, in the description of the lighting device according to the embodiment of the present invention, the fourth surface (1400) refers to a surface where the wall portion (1420) placed on both sides of the recessed space comes into contact with the first-1 area (2121) or the second-1 area (2221). In the description to be described later, it may be preferable to interpret the fourth surface (1400) as the part where the wall portion (1420) comes into contact with the first-1 area (2121) or the second-1 area (2221) as described above.

[0071] Meanwhile, as illustrated in FIG. 5, the first-1 area (2121) and the second-1 area (2221) are arranged to overlap in the third direction on the fourth surface (1400) of the housing (1000). In the description of the lighting device according to the embodiment of the present invention, the second-1 area (2221) is shown as being placed relatively further outward than the first-1 area (2121), but the first-1 area (2121) may be placed further inward and the second-1 area (2221) may be placed further outward, and the arrangement may not necessarily be limited to what is depicted.

[0072] As such, the first-1 region (2121) and the second-1 region (2221) are arranged overlappingly on the fourth surface (1400), the first-2 region (2122) and the second-2 region (2222) extend along the first direction to the outside of the housing (1000), and it is easy to secure space for the first coupling part (2130) and the second coupling part (2230) to be coupled to the third coupling part (2330), thereby minimizing the overall volume.

[0073] To explain in detail, in the case of a micro lighting device in which the first coupling part (2130), the second coupling part (2230), and the third coupling part (2330) are generally arranged adjacent to the housing (1000), the extension part is arranged in a manner that surrounds the housing (1000), so heat generated in the housing (1000) is transferred to the extension part, and it is difficult to secure a space for the heat to escape to the outside, so there may be a disadvantage that the heat dissipation performance is significantly reduced.

[0074] In contrast, the lighting device according to the embodiment of the present invention has the advantage of securing higher heat dissipation performance because, in the fourth surface (1400), only the first-1 area (2121) and the second-1 area (2221) overlap each other, and the first-2 area (2122) and the second-2 area (2222) are located outside the housing (1000), and the first board (2110), the second board (2210), and the third board (2310) are arranged to be exposed to the outside, so the housing (1000) is not enclosed by the first extension part (2120), the second extension part (2220), and the third extension part (2320). This will be further explained through the drawings to be described later.

[0075] Meanwhile, to explain the third panel section (2300) in more detail, refer to FIG. 6. As shown in FIG. 6, the first-2 area (2122) extending outward in the first direction from the lower end of the first-1 area (2121) adjacent to the second surface (1200) of the first extension section (2120) and the second-2 area (2222) extending outward in the first direction from the lower end of the second-1 area (2221) adjacent to the first surface (1100) of the second extension section (2220) can be arranged so as not to overlap each other in the third direction.

[0076] However, the third extension part (2320) has a portion that overlaps with the first-2 area (2122) in the third direction and a portion that overlaps with the second-2 area (2222) in the third direction, and as described above, the area that overlaps with the first-2 area (2122) in the third direction is the third-1 area (2321), and the area that overlaps with the second-2 area (2222) in the third direction may be the third-2 area (2322).

[0077] At this time, in the case of a relatively soft material, for example, an FPCB, the position of the assembly in which the first coupling part (2130), the second coupling part (2230) and the third coupling part (2330) are coupled can be freely adjusted, so there may be an advantage in that both convenience of placement and heat dissipation performance can be secured.

[0078] In addition, as described above, the 3-1 coupling part (2331) is placed in the 4-1 area (2332), the 1 coupling part (2130) is also placed in the 4-1 area (2332), the 3-2 coupling part (2333) is placed in the 4-2 area (2334), and the 2 coupling part (2230) can also be placed in the 4-2 area (2334). In this way, the first coupling part (2130) and the second coupling part (2230) have a technical feature in which the aforementioned first-2 region (2122) and second-2 region (2222) do not overlap in the third direction, and the fourth-1 region (2332) and fourth-2 region (2334) are arranged separately in the third coupling part (2330), thereby ensuring convenience of assembly as the first coupling part (2130) and the second coupling part (2230) are arranged separately in the second direction.

[0079] Meanwhile, to explain the first surface (1100), second surface (1200), and extension part (1700) on which the first board (2110), second board (2210), and third board (2310) of the lighting device according to an embodiment of the present invention are arranged, reference may be made to FIGS. 7 to 9.

[0080] First, to explain the first board (2110) and the first surface (1100), refer to FIG. 7. As shown in FIG. 7, the first board (2110) is placed on the first surface (1100). The first surface (1100) includes a first placement area (1110) where the first board (2110) is placed, and a first recessed area (1120) that is stepped in a second direction from the first placement area (1110). An adhesive (E) may be placed between the first placement area (1110) and the first board (2110) in the second direction. A first light source (2111) and a part of the first extension (2120) are placed in the first recessed area (1120), and the first light source (2111) may be fixed to the first board (2110).

[0081] Additionally, the first board (2110) has a length in the third direction that is longer than the length in the first direction, and the housing (1000) for the placement of the first board (2110) may have a length in the third direction that is longer than the length in the first direction as described above. However, depending on the placement of the first light source (2111) of the first board (2110), there is an area of ​​the first board (2110) that does not overlap with the first surface (1100) in the second direction. In such cases, if the first light irradiated from the first light source (2111) is not fixed to the first surface (1100), the first light may be subject to external interference or a separate external light may be introduced into the optical system. Therefore, to secure the placement space for the first board (2110), at least a part of the extension (1700) may overlap with the first board (2110) in the second direction.

[0082] Specifically, at least a portion of the first board (2110) is disposed on the first side (1730) facing the first surface (1100) in the second direction, and a first overlapping area (1731) that overlaps with the first board (2110) in the second direction may be formed. At this time, an adhesive (E) may be disposed between the first overlapping area (1731) and the first board (2110) in the second direction as described above. That is, the adhesive (E) may be disposed between the first board (2110) and the first placement area (1110) in the second direction and between the first board (2110) and the first overlapping area (1731) in the second direction, respectively.

[0083] Meanwhile, referring to FIG. 8 to explain the second board (2210) and the second surface (1200), as shown in FIG. 8, the second board (2210) is placed on the second surface (1200), and the second surface (1200) includes a second placement area (1210) where the second board (2210) is placed, and a second recessed area (1220) that is stepped in the second direction from the second placement area (1210), and an adhesive (E) may be placed between the second placement area (1210) and the second board (2210) in the second direction. A second light source (2211) and a part of the second extension (2220) are placed in the second recessed area (1220), and the second light source (2211) may be fixed to the second board (2210).

[0084] Additionally, the second board (2210) has a length in the third direction that is longer than the length in the first direction, and the housing (1000) for the second board (2210) to be placed may have a length in the third direction that is longer than the length in the first direction as described above. However, depending on the placement of the second light source (2211) of the second board (2210), there is a region of the second board (2210) that does not overlap with the second surface (1200) in the second direction. In such cases, if it cannot be fixed to the second surface (1200), the second light irradiated from the second light source (2211) may be subject to external interference or a separate external light may be introduced into the optical system. Therefore, in order to secure the placement space for the second board (2210), at least a part of the extension (1700) may overlap with the second board (2210) in the second direction.

[0085] Specifically, at least a portion of the second board (2210) is disposed on the second side (1740) facing the second surface (1200) in the second direction, and a second overlapping area (1741) that overlaps with the second board (2210) in the second direction may be formed. At this time, an adhesive (E) may be disposed between the second overlapping area (1741) and the second board (2210) in the second direction as described above. That is, the adhesive (E) may be disposed between the second board (2210) and the second placement area (1210) in the second direction, and between the second board (2210) and the second overlapping area (1741) in the second direction, respectively.

[0086] Meanwhile, referring to FIG. 9 to explain the third board (2310) and the extension part (1700), as illustrated in FIG. 9, the third board (2310) is placed on the extension part (1700), and the extension part (1700) includes a third placement area (1710) where the third board (2310) is placed, and a third recessed area (1720) that is stepped in the first direction from the third placement area (1710), and an adhesive (E) may be placed between the third placement area (1710) and the third board (2310) in the first direction. A third light source (2311) and a part of the third extension part (2320) are placed in the third recessed area (1720), and the third light source (2311) may be fixed to the third board (2310).

[0087] Unlike the previous case where the first surface (1100) and the second surface (1200) utilized the first side (1730) and the second side (1740) of the extension part (1700) to secure the placement area of ​​the first board (2110) and the second board (2210), the third board (2310) is placed only on the extension part (1700) and can overlap with the extension part (1700) in the first direction. Additionally, although not illustrated, the extension part (1700) includes a hole penetrating toward the third surface (1300), and the hole is arranged to overlap with the third board (2310) in the first direction, and the third light source (2311), the hole, the optical system inside the housing (1000), and the barrel part (B) can be arranged in the first direction.

[0088] That is, the first board (2110) and the second board (2210) are each placed on the first surface (1100) and the second surface (1200), respectively, and are placed in a direction perpendicular to the optical axis of the optical system, while the third board (2310) can be placed to face the optical system in a first direction parallel to the optical axis.

[0089] Meanwhile, to summarize and explain the optical display device according to an embodiment of the present invention, refer to FIG. 10. As shown in FIG. 10, a first board (2110) is fixed to a first surface (1100) by an adhesive (E), and a first heat dissipation member (4100) is disposed on the outer side of the first board (2110), so that the heat of the first board (2110) can be rapidly discharged to the outside, thereby significantly improving the heat dissipation performance. In addition, a second board (2210) is fixed to a second surface (1200) by an adhesive (E), and a second heat dissipation member (4200) is disposed on the outer side of the second board (2210), so that the heat of the second board (2210) can be rapidly discharged to the outside, thereby significantly improving the heat dissipation performance.

[0090] Meanwhile, an extension part (1700) is disposed on the third surface (1300), and a third board (2310) is disposed on the extension part (1700), and the third board (2310) can be fixed to the extension part (1700) through an adhesive (E). In addition, a third heat dissipation member (4300) is disposed on the outer side of the third board (2310) to significantly improve heat dissipation performance.

[0091] Meanwhile, since the first light source (2111), the second light source (2211), and the third light source (2311) irradiate light toward the optical system, high heat generation is generated, which can be transferred to the first board (2110), the second board (2210), and the third board (2310), respectively. Accordingly, it may be preferable that the area of ​​the first board (2110) is larger than the area of ​​the first light source (2111), the area of ​​the second board (2210) is larger than the area of ​​the second light source (2211), and the area of ​​the third board (2310) is larger than the area of ​​the third light source (2311). In addition, since the first extension part (2120), the second extension part (2220), and the third extension part (2320) are not disposed on the outer surface facing the outside of the housing (1000) of each of the first board (2110), the second board (2210), and the third board (2310), heat dissipation performance through the first board (2110), the second board (2210), and the third board (2310) can be secured more effectively.

[0092] However, the first extension part (2120), the second extension part (2220), and the third extension part (2320) may not be placed on the fifth surface (1500) opposite to the fourth surface (1400) where the first-1 area (2121) and the second-1 area (2221) overlap in the third direction.

[0093] Referring to FIG. 11 to more clearly explain the arrangement of the first extension (2120), second extension (2220), and third extension (2320) in the fourth surface (1400) and fifth surface (1500) described above, as shown in FIG. 11, the housing (1000) is formed to be long in the third direction, and the barrel portion (B) and the optical system may be arranged eccentrically with respect to the center (HC) of the housing (1000).

[0094] Specifically, the center (HC) of the housing (1000) in the third direction may be positioned at a different location from the center (BC) of the barrel section (B), the center of the optical system, or the optical axis, and it may be preferable for the barrel section (B) to be positioned eccentrically adjacent to the fifth surface (1500).

[0095] To explain based on this arrangement, heat generated from the first light source (2111), the second light source (2211), and the third light source (2311) has a certain effect on the internal optical system, and the lighting device according to the embodiment of the present invention can more easily dissipate heat generated by the first light, the second light, and the third light of the first light source (2111), the second light source (2211), and the third light source (2311) by being arranged so that the fifth surface (1500) is exposed to the outside. In addition, since the fourth surface (1400) is positioned relatively further away from the optical system in the third direction than the fifth surface (1500), the effect of heat generated in the first-1 region (2121) and the second-1 region (2221) being transferred to the optical system can be reduced, and conversely, the certain heat generated by the optical system being transferred to the first-1 region (2121) and the second-1 region (2221) can also be prevented, thereby ensuring high heat dissipation performance.

[0096] That is, the portion where the first-1 region (2121) and the second-1 region (2221) overlap in the third direction is positioned relatively apart from the optical system in the third direction, and the optical system can be positioned closer to the fifth surface (1500) than to the fourth surface (1400) in the third direction.

[0097] According to the configuration and function of the lighting device according to the embodiment of the present invention described above, there may be an advantage in that high heat dissipation performance can be secured by minimizing the area in which the first extension part (2120), the second extension part (2220), and the third extension part (2320) surround the housing (1000), while also minimizing the area in which the first panel part (2100), the second panel part (2200), and the third panel part (2300) overlap toward the outside of the housing (1000), thereby facilitating heat dissipation to the outside.

[0098] We have examined preferred embodiments according to the invention, and it is obvious to those skilled in the art that, in addition to the embodiments described above, the invention may be embodied in other specific forms without departing from the spirit or scope thereof.

[0099] Therefore, the embodiments described above should be regarded as exemplary rather than limiting, and accordingly, the present invention is not limited to the description above but may be modified within the scope of the appended claims and their equivalents.

Claims

1. A housing in which an optical system is disposed on the inner side; and It includes a light source module that irradiates light into the inner side of the above housing, and The light source module includes a first panel part extending to the outside of the housing and having one side coupled to a first surface of the housing, a second panel part having one side coupled to a second surface of the housing, and a third panel part having one side coupled to a third surface of the housing. The third surface is positioned such that it overlaps at least a portion with the optical system in a first direction parallel to the optical axis of the optical system, and The first panel portion includes a first-1 region disposed on the housing and a first-2 region disposed on the outside of the housing, and The second panel portion includes a second-1 region disposed on the housing and a second-1 region disposed on the outside of the housing. A lighting device in which the above-mentioned first-1 region and the above-mentioned second-1 region overlap in a third direction perpendicular to the second direction directed toward the other from either the first direction and the first surface or the second surface.

2. In Paragraph 1, The above housing includes a fourth surface and a fifth surface disposed between the first surface and the second surface in the first direction, and The first-1 region and the second-1 region are disposed on the fourth surface, and A lighting device in which the first panel section, the second panel section, and the third panel section are not arranged on the fifth side.

3. In Paragraph 1, The first panel portion comprises a first board including a light source disposed on the housing, a first extension portion extending from the first board, and a first coupling portion disposed on the outside of the housing. The second panel portion comprises a second board including a light source disposed on the housing, a second extension portion extending from the second board, and a second coupling portion disposed on the outside of the housing. The lighting device comprising a third panel portion including a third board including a light source disposed on the housing, a third extension portion extending from the third board, and a third coupling portion disposed on the outside of the housing.

4. In Paragraph 3, A lighting device in which the first coupling part, the second coupling part, and the third coupling part are coupled to each other on the outside of the housing.

5. In Paragraph 4, A lighting device comprising a third extension portion that overlaps a portion of the first extension portion in the third direction and a third-2 portion that overlaps a portion of the second extension portion in the third direction.

6. In Paragraph 5, A lighting device in which the first extension and the second extension do not overlap each other in the third direction.

7. In Paragraph 3, The first surface includes a first placement area coupled to the first board and a first recessed area recessed into the inside of the housing from the first placement area, and The lighting device comprising the second surface, a second placement area coupled to the second board, and a second recessed area recessed into the inside of the housing from the second placement area.

8. In Paragraph 7, It further includes an extension portion disposed between the third surface and the third board in the aforementioned third direction, and The above extension is a lighting device comprising a third placement area coupled to the third board and a third recessed area recessed into the inside of the housing in the third placement area.

9. In Paragraph 8, It includes a first side and a second side spaced apart in the second direction of the extension portion, The first side is positioned such that a part of the first board is arranged in the second direction, and The above second side is a lighting device in which a part of the second board is positioned in the above second direction.

10. In Paragraph 3, A first heat dissipation member is disposed on the outer surface of the first board in the above second direction, and A second heat dissipation member is disposed on the outer surface of the second board in the above second direction, and A lighting device in which a third heat dissipation member is disposed on the outer surface of the third board in the first direction.

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