Lighting unit and lighting device including same

Abstract

A lighting unit according to the present invention comprises: a substrate having a light source disposed on the front surface thereof; a lens disposed on the front surface of the substrate to totally reflect light of the light source; and an inner visor which has open front and rear ends to form a lens accommodation chamber into which the lens is inserted, and absorbs the light totally reflected by the lens. As side light of the lens may be absorbed by the inner visor, glare of light that is distributed to the outside may be prevented.

Description

Lighting unit and lighting device including same

[0001] The present invention relates to a lighting unit and a lighting device including the same, and more particularly, to a lighting unit used to illuminate a relatively wide area such as a sports stadium or a performance hall, and a lighting device including the same.

[0002]

[0003] Outdoor stadiums, such as baseball fields, soccer fields, and track and field stadiums, typically feature lighting towers. These towers require at least 800 watts of power to directly illuminate the field where the game is being played, leading to significant power consumption. To address this shortcoming, technologies utilizing LED lighting are being developed.

[0004] Korean Patent Publication No. 10-2132456 (July 9, 2020) (hereinafter referred to as “prior art”) discloses an “LED lighting device having a lens structure capable of efficient light distribution control,” which is an example of technologies using the LED lighting.

[0005] The above-mentioned conventional technology includes a lighting unit including a plurality of LEDs installed on the inside of a side of a housing, and a lens unit configured to allow light to pass through, installed on a plurality of LEDs arranged at a certain interval along a substrate of the lighting unit, and totally reflecting at least a portion of the light irradiated from the LEDs.

[0006] However, in the above-described prior art, when the light of the LED passes through the lens, some of the light spreads out laterally from the lens. Here, there was a problem in that the side light, which is the light that spreads out laterally from the lens, spreads around the main light that is distributed to the outside, causing glare.

[0007]

[0008] The technical problem of the present invention is to provide a lighting unit capable of preventing glare of light radiating to the outside by absorbing side light of a lens, and a lighting device including the same.

[0009] The technical problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0010]

[0011] To achieve the above object, a lighting unit according to the present invention comprises a substrate, a lens, and an inner visor. A light source is arranged on the front surface of the substrate. The lens is arranged on the front surface of the substrate and totally reflects light from the light source. The inner visor has openings at the front and rear ends to form a lens receiving chamber into which the lens is inserted. The inner visor absorbs light totally reflected by the lens.

[0012] The above substrate may be formed with at least a front surface that is black. The inner visor may be formed with at least an inner surface that is black.

[0013] The above substrate and the inner visor can be formed in a black color by anodizing the surface.

[0014] The rear end of the inner visor can be bonded to the substrate.

[0015] The above lens housing can be formed in a square shape.

[0016] The above inner visor can be composed of an upper part, a lower part, a left part, and a right part.

[0017] The upper part, the lower part, the left part, and the right part may have slits formed to be joined to each other.

[0018] At least one inner visor coupling portion may be protrudingly arranged on the front surface of the substrate. At least one plate-shaped coupling protrusion may be formed on the rear end of the inner visor. A slot into which the at least one plate-shaped coupling protrusion is inserted and coupled may be formed in the at least one inner visor coupling portion.

[0019] The lens may be composed of a base portion and a total reflection portion. The base portion may be formed in a plate shape. The total reflection portion may be formed to protrude on the rear surface of the base portion. An entrance groove may be formed on the rear surface of the total reflection portion, into which light from the light source is incident. An exit groove may be formed on the front surface of the base portion, opposite the entrance groove, through which light incident on the entrance groove is emitted. The outer surface of the base portion may be in contact with the inner surface of the lens accommodation chamber.

[0020] A lighting device according to the present invention comprises a heat-dissipating housing, a light distribution cover, and a lighting unit. The light distribution cover covers the open front surface of the heat-dissipating housing. The lighting unit is disposed within the heat-dissipating housing. The lighting unit comprises a substrate, a lens, and an inner visor. A light source is disposed on the front surface of the substrate. The lens is disposed on the front surface of the substrate and totally reflects light from the light source. The inner visor has front and rear ends that are open to form a lens receiving chamber into which the lens is inserted. The inner visor absorbs light totally reflected by the lens.

[0021] The inner visor may have a plurality of lens accommodation chambers formed in a grid shape.

[0022] Specific details of other embodiments are included in the detailed description and drawings.

[0023]

[0024] The lighting unit and lighting device including the same according to the present invention have an inner visor having a lens receiving chamber formed by openings at the front and rear ends and into which a lens is inserted, so that the inner visor absorbs light totally reflected by the lens, thereby having the effect of preventing glare from light radiating to the outside.

[0025] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0026]

[0027] Fig. 1 is a perspective view showing a lighting device according to an embodiment of the present invention;

[0028] Figure 2 is a drawing showing the state in which the light distribution cover is removed from Figure 1.

[0029] Fig. 3 is a drawing showing the lighting unit shown in Fig. 2;

[0030] Figure 4 is an exploded perspective view of Figure 3 and an enlarged view of a portion thereof;

[0031] Fig. 5 is a drawing showing a part of Fig. 3;

[0032] Fig. 6 is an exploded perspective view showing the inner visor illustrated in Fig. 5;

[0033] Fig. 7 is a drawing showing the substrate shown in Fig. 5 and an enlarged view of a part thereof;

[0034] Fig. 8 is a drawing showing the inner visor and substrate in Fig. 5, excluding the inner visor and substrate.

[0035] Figure 9 is a rear perspective view of Figure 8;

[0036] Fig. 10 is an exploded perspective view of Fig. 8;

[0037] Figure 11 is a rear perspective view of Figure 10;

[0038] Figure 12 is a side cross-sectional view of Figure 5.

[0039]

[0040] <Explanation of symbols>

[0041] 1: Lighting device

[0042] 10: Heat dissipation housing

[0043] 20: Backlight cover

[0044] 50: Lighting unit

[0045] 100: Light source

[0046] 200: Substrate

[0047] 250: Inner visor joint

[0048] 255: Slot

[0049] 300: Lens

[0050] 310: Bass section

[0051] 315: Home of the shoot

[0052] 320: Total reflection section

[0053] 325: Home page

[0054] 400: Inner Visor

[0055] 410: Lens chamber

[0056] 420: Top

[0057] 421, 422, 441, 442, 461, 462, 481, 482: Slits

[0058] 440: Lower part

[0059] 450: Plate-shaped joining projection

[0060] 460: Seat

[0061] 480: Upanbu

[0062]

[0063] Hereinafter, a lighting unit and a lighting device including the same according to an embodiment of the present invention will be described with reference to drawings.

[0064] When assigning reference numerals to components in each drawing, it should be noted that identical components are assigned the same numerals whenever possible, even if they appear on different drawings. Furthermore, when describing embodiments of the present invention, if a detailed description of a related known configuration or function is deemed to hinder understanding of the embodiments of the present invention, the detailed description will be omitted.

[0065] When describing components of embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by these terms. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined in this application.

[0066] Fig. 1 is a perspective view showing a lighting device according to an embodiment of the present invention, and Fig. 2 is a drawing showing a state in which the light distribution cover is removed from Fig. 1.

[0067] Hereinafter, in terms related to directions such as front, back, up, down, left, and right in the description, the front, back, up, down, left, and right directions refer to the front, back, up, down, left, and right directions indicated by arrows in FIGS. 1 and 2, and the lighting unit and lighting device including the same according to the embodiment of the present invention shine light outward through the front in the drawing, but when actually used, the direction in which light shines outward may be changed in various ways.

[0068] Referring to FIGS. 1 and 2, the lighting device (1) according to the embodiment of the present invention can be used to brightly illuminate a wide area such as a sports stadium or a performance hall.

[0069] A lighting device (1) according to an embodiment of the present invention may include a heat dissipation housing (10), a light distribution cover (20), a heat dissipation fin (30), a fixing bracket (40), and a lighting unit (50).

[0070] The heat dissipation housing (10) may be formed of a material that can easily dissipate internal heat to the outside. For example, the heat dissipation housing (10) may be formed of aluminum or an aluminum alloy having good thermal conductivity.

[0071] The heat dissipation housing (10), the light distribution cover (20), the heat dissipation fin (30), and the fixing bracket (40) can be combined with each other to form the external shape of the lighting device (1), and the lighting unit (50) can be placed in the internal space of the heat dissipation housing (10).

[0072] The heat dissipation housing (10) may have an open front, and the light distribution cover (20) may be coupled to the open front of the heat dissipation housing (10) to cover the open front of the heat dissipation housing (10).

[0073] The heat dissipation housing (10) can be formed in a roughly square cylinder shape with an open front, and the light distribution cover (20) can be formed in a roughly square plate shape that covers the open front of the heat dissipation housing (10).

[0074] The light distribution cover (20) may be formed of a transparent material capable of distributing light to the outside. For example, the light distribution cover (20) may be formed of transparent glass.

[0075] A plurality of heat dissipation fins (30) may be combined on the rear surface of the heat dissipation housing (10). The plurality of heat dissipation fins (30) may be formed in an approximately square plate shape. The plurality of heat dissipation fins (30) may be formed of a material that can easily dissipate heat from the heat dissipation housing (10) to the outside. For example, the plurality of heat dissipation fins (30) may be formed of aluminum or an aluminum alloy having good thermal conductivity. The plurality of heat dissipation fins (30) may be formed as conventional heat dissipation fins for increasing the contact area with the outside air, or may be formed as heat dissipation fins in which a refrigerant flows inside to exchange heat with the outside air.

[0076] A plurality of heat dissipation fins (30) form a sufficient contact area with the external air of the heat dissipation housing (10), so that the heat of the heat dissipation housing (10) can be quickly dissipated to the outside. The plurality of heat dissipation fins (30) can be formed to be long vertically, and can be arranged to face each other while being spaced apart from each other left and right.

[0077] A plurality of protective frames (60) may be installed on the rear side of the heat dissipation housing (10), and a plurality of heat dissipation fins (30) may be arranged in an internal space formed by the plurality of protective frames (60). The internal space formed by the plurality of protective frames (60) may be in communication with the exterior of the plurality of protective frames (60). The plurality of protective frames (60) may cover the upper side, lower side, left side, right side, and rear side of the plurality of heat dissipation fins (30) so as to be in communication with the exterior space, respectively.

[0078] The heat dissipation housing (10) can be rotatably coupled to the fixed bracket (40). The lower part of the heat dissipation housing (10) can be rotatably coupled to the upper part of the fixed bracket (40). The heat dissipation housing (10) can be rotatably coupled to the fixed bracket (40) through a horizontal axis that is arranged long from side to side, and can rotate about the horizontal axis as the center of rotation.

[0079] Here, the fixed bracket (40) can be connected to the upper end of a support, such as a pole, which is arranged long upward on the ground. A plurality of fastening parts (45) that are connected to the upper end of the support through a plurality of bolts can be formed to protrude horizontally at the lower end of the fixed bracket (40). A bolt fastening hole (46) can be formed to be open vertically in each of the plurality of fastening parts (45). Among the plurality of fastening parts (45), a pair of fastening parts (45) can be formed to protrude to the left at the lower left end of the fixed bracket (40), and a pair of fastening parts (45) can be formed to protrude to the right at the lower right end of the fixed bracket (40).

[0080] The operator can adjust the light distribution angle of the lighting device (1) according to the embodiment of the present invention by adjusting the rotation angle of the heat dissipation housing (10) with respect to the fixed bracket (40). That is, the operator can adjust the light distribution angle of the lighting device (1) according to the embodiment of the present invention by rotating the heat dissipation housing (10) about the horizontal axis as the rotation center.

[0081] The lighting unit (50) can be inserted and placed in the internal space of the heat dissipation housing (10). The specific structure of the lighting unit (50) will be described below.

[0082] FIG. 3 is a drawing showing the lighting unit shown in FIG. 2, FIG. 4 is an exploded perspective view of FIG. 3 and an enlarged view of a portion thereof, FIG. 5 is a drawing showing a portion of FIG. 3, FIG. 6 is an exploded perspective view showing the inner visor shown in FIG. 5, and FIG. 7 is a drawing showing the substrate shown in FIG. 5 and an enlarged view of a portion thereof.

[0083] Referring to FIGS. 3 to 7, the lighting unit (50) may include a light source (100), a substrate (200), a lens (300), and an inner visor (400).

[0084] The light source (100) can generate light using electrical energy. The light source (100) can generate light and shine it forward. The light source (100) can be formed by an LED (light emitting diode). The light source (100) can be formed by a plurality of light sources (100). The plurality of light sources (100) can be formed by arranging two light sources vertically and two light sources horizontally in a row per lens (300), thereby forming four light sources. In the present embodiment, the lenses (300) can be arranged vertically and horizontally in a row, thereby forming a total of 64, and the plurality of light sources (100) can be formed by arranging four light sources per each of the 64 lenses, thereby forming a total of 256.

[0085] The light source (100) may be mounted on the substrate (200) and placed on the front surface of the substrate (200). A circuit for supplying the electric energy to the light source (100) or controlling the light source (100) may be printed on the substrate (200). That is, the substrate (200) may be a printed circuit board (PCB). The substrate (200) is formed in a rectangular shape, but may also be formed in a shape other than a rectangular shape. The substrate (200) may be formed of a metal PCB, which is a metal material. For example, the substrate (200) may include an aluminum material.

[0086] The lens (300) may be arranged on the front of the substrate (200). The lens (300) may distribute light generated from the light source (100) forward. That is, light generated from the light source (100) may pass through the lens (300). The lens (300) may be arranged in front of the light source (100). The lens (300) may be formed transparently. The lens (300) may totally reflect the light generated from the light source (100), and the main light of the light totally reflected by the lens (300) may be distributed to the outside through the light distribution cover (20).

[0087] Since the lens (300) is provided as a lens that totally reflects the light of the light source (100), there may be a problem that the light distributed to the outside through the light distribution cover (20) causes glare due to side light, which is light that spreads to the side of the lens (300). However, in the present embodiment, to solve the problem, an inner visor (400) that can absorb the side light of the lens (300) can be installed.

[0088] That is, the inner visor (400) may have an opening at the front and rear ends to form a lens receiving chamber (410) into which a lens (300) is inserted. The inner visor (400) may absorb light that is totally reflected by the lens (300). Therefore, the main light that is totally reflected by the lens (300) may be totally reflected by the light distribution cover (20) through the opened front end of the inner visor (400) and may be distributed to the outside of the light distribution cover (20), and the side light that is totally reflected by the lens (300) may be absorbed on the inner surface of the inner visor (400).

[0089] The lens accommodation chamber (410) may be formed with a plurality of lens accommodation chambers (410) that are the same number as the number of lenses (300). Lenses (300) may be inserted and arranged in each of the plurality of lens accommodation chambers (410). In the present embodiment, since the lenses (300) are formed in a square shape and are provided with a plurality of lenses (300) arranged in a row, a plurality of lens accommodation chambers (410) are formed in a grid shape in the inner visor (400). That is, in the present embodiment, the number of lens accommodation chambers (410) is formed by 8 arranged in a row vertically and 8 arranged left and right, resulting in a total of 64 lens accommodation chambers (410). However, the number of lenses (300) and the number of lens accommodation chambers (410) may be changed to various numbers depending on the size and purpose of the place where the lighting device (1) is installed, and the number of light sources (100) may also be changed accordingly.

[0090] In this way, the internal space of the inner visor (400) can be formed as a lens accommodation chamber (410) into which the lens (300) is inserted and placed. The inner visor (400) can be formed in a cylindrical shape so that the lens (300) can be inserted and placed in the lens accommodation chamber (410). In addition, the inner visor (400) can have openings at the front and rear ends so that the light of the light source (100) totally reflected by the lens (300) can be distributed to the outside through the light distribution cover (20). That is, the light of the light source (100) totally reflected by the lens (300) can be totally reflected to the light distribution cover (20) through the opened front end of the inner visor (400), and the side light of the lens (300) can be absorbed on the inner surface of the inner visor (400).

[0091] The inner visor (400) may be formed in a rectangular cylinder shape. That is, the internal space of the inner visor (400) may form a rectangular lens accommodation chamber (410). Specifically, the inner visor (400) may include an upper plate (420), a lower plate (440), a left plate (460), and a right plate (480). The upper plate (420), the lower plate (440), the left plate (460), and the right plate (480) may be formed in the same shape.

[0092] The upper part (420) and the lower part (440) may be arranged horizontally, and the seat part (420) and the right part (440) may be arranged vertically. The upper part (420) may be arranged spaced apart upwardly from the lower part (440), and the lower part (440) may be arranged spaced downwardly from the upper part (420). The seat part (460) may be arranged spaced apart to the left from the right part (480), and the right part (480) may be arranged spaced apart to the right from the seat part (460). The upper part (420) and the lower part (440) may be arranged to face each other vertically, and the seat part (460) and the right part (480) may be arranged to face each other left and right. The upper part (420), lower part (440), left part (460), and right part (480) can be combined with each other to form a square inner visor (400).

[0093] The upper part (420), lower part (440), left part (460), and right part (480) may have slits (421, 422, 441, 442, 461, 462, 481, 482) that are coupled to each other. The slits (421, 422, 441, 442, 461, 462, 481, 482) may include a pair of slits (421, 422) formed spaced apart from each other left and right in the upper plate (420), a pair of slits (441, 442) formed spaced apart from each other left and right in the lower plate (440), a pair of slits (461, 462) formed spaced apart from each other up and down in the left plate (460), and a pair of slits (481, 482) formed spaced apart from each other up and down in the right plate (480).

[0094] A pair of slits (421, 422) formed in the upper portion (420) may include a first slit (421) and a second slit (422) that are spaced apart from each other on the left and right. The first slit (421) may be positioned spaced apart to the left from the second slit (422), and the second slit (422) may be positioned spaced apart to the right from the first slit (421). The first slit (421) and the second slit (422) may be cut from the front end of the upper portion (420) to the rear.

[0095] A pair of slits (441, 442) formed in the lower portion (440) may include a third slit (441) and a fourth slit (442) that are spaced apart from each other on the left and right. The third slit (441) may be positioned spaced apart to the left from the fourth slit (442), and the fourth slit (442) may be positioned spaced apart to the right from the third slit (441). The third slit (441) and the fourth slit (442) may be cut from the front end of the lower portion (440) to the rear.

[0096] A pair of slits (461, 462) formed in the seat portion (460) may include a fifth slit (461) and a sixth slit (462) that are spaced apart from each other vertically. The fifth slit (461) may be positioned spaced upward from the sixth slit (462), and the sixth slit (462) may be positioned spaced downward from the fifth slit (461). The fifth slit (461) and the sixth slit (462) may be cut forward from the rear end of the seat portion (460).

[0097] A pair of slits (481, 482) formed in the right plate (480) may include a seventh slit (481) and an eighth slit (482) that are spaced apart from each other vertically. The seventh slit (481) may be spaced upward from the eighth slit (482), and the eighth slit (482) may be spaced downward from the seventh slit (481). The seventh slit (481) and the eighth slit (482) may be cut forward from the rear end of the right plate (480).

[0098] The first slit (421) formed in the upper part (420) and the fifth slit (461) formed in the seat part (460) can be combined, the second slit (422) formed in the upper part (420) and the seventh slit (481) formed in the right part (480) can be combined, the third slit (441) formed in the lower part (440) and the sixth slit (462) formed in the seat part (460) can be combined, and the fourth slit (442) formed in the lower part (440) and the eighth slit (482) formed in the right part (480) can be combined.

[0099] In order to absorb light other than the daylight that the lens (300) totally reflects, the substrate (200) and the inner visor (400) may be formed in black. However, the substrate (200) does not have to be formed in black on its entire surface, and at least the front surface may be formed in black. In addition, the inner visor (400) does not have to be formed in black on its entire surface, and at least the inner side may be formed in black.

[0100] In this embodiment, the substrate (200) and the inner visor (400) may be formed of aluminum or an aluminum alloy, and the substrate (200) and the inner visor (400) may be formed in a black color by anodizing the surface. The substrate (200) may be formed in a black color by anodizing the entire surface, and the inner visor (400) may be formed in a black color by anodizing the entire surface.

[0101] The rear end of the inner visor (400) may be coupled to the substrate (200). At least one inner visor coupling portion (250) may be protrudingly arranged on the front side of the substrate (200), and at least one plate-shaped coupling protrusion (450) may be formed to protrude rearward on the rear end of the inner visor (400). A slot (255) into which at least one plate-shaped coupling protrusion (450) is inserted and coupled may be formed on at least one inner visor coupling portion (250).

[0102] In this embodiment, at least one plate-shaped engaging protrusion (450) may include a first plate-shaped engaging protrusion (451) formed to protrude rearwardly at the rear end central portion of the upper plate portion (420), a second plate-shaped engaging protrusion (452) formed to protrude rearwardly at the rear end central portion of the lower plate portion (440), a third plate-shaped engaging protrusion (453) formed to protrude rearwardly at the rear end central portion of the left plate portion (460), and a fourth plate-shaped engaging protrusion (454) formed to protrude rearwardly at the rear end central portion of the right plate portion (480). The first plate-shaped engaging protrusion (451), the second plate-shaped engaging protrusion (452), the third plate-shaped engaging protrusion (453), and the fourth plate-shaped engaging protrusion (454) may be formed to have the same shape.

[0103] In addition, at least one inner visor coupling portion (250) may include a first inner visor coupling portion (251), a second inner visor coupling portion (252), a third inner visor coupling portion (253), and a fourth inner visor coupling portion (254). The first inner visor coupling portion (251), the second inner visor coupling portion (252), the third inner visor coupling portion (253), and the fourth inner visor coupling portion (254) may be formed in the same shape. Slots (255) may be formed in each of the first inner visor coupling portion (251), the second inner visor coupling portion (252), the third inner visor coupling portion (253), and the fourth inner visor coupling portion (254).

[0104] The first plate-shaped coupling protrusion (451) of the upper part (420) can be inserted into and coupled to a slot (255) formed in the first inner visor coupling part (251), the second plate-shaped coupling protrusion (452) of the lower part (440) can be inserted into and coupled to a slot (255) formed in the second inner visor coupling part (252), the third plate-shaped coupling protrusion (453) of the left part (460) can be inserted into and coupled to a slot (255) formed in the third inner visor coupling part (253), and the fourth plate-shaped coupling protrusion (454) of the right part (480) can be inserted into and coupled to a slot (255) formed in the fourth inner visor coupling part (254).

[0105] FIG. 8 is a drawing showing the inner visor and substrate of FIG. 5, FIG. 9 is a rear perspective view of FIG. 8, FIG. 10 is an exploded perspective view of FIG. 8, FIG. 11 is a rear perspective view of FIG. 10, and FIG. 12 is a side cross-sectional view of FIG. 5.

[0106] Referring to FIGS. 8 to 12, the lens (300) may include a base portion (310) and a total reflection portion (320).

[0107] The base portion (310) may be formed in a plate shape. In the present embodiment, the base portion (310) is formed in a square plate shape, but may also be formed in a plate shape of a shape other than a square plate shape. The shape of the lens accommodation chamber (410) formed in the inner visor (400) may be formed in a shape corresponding to the shape of the base portion (310). That is, when the lens (300) is accommodated in the lens accommodation chamber (410), the outer circumferential surface of the base portion (310) may come into contact with the inner surface of the lens accommodation chamber (410).

[0108] The total reflection portion (320) may be formed to protrude from the rear surface of the base portion (310). The outer surface of the total reflection portion (320) may be formed as an outwardly convex curved surface. The total reflection portion (320) may be arranged in front of the corresponding light source (100). The total reflection portion (320) may be provided with a plurality of total reflection portions (320). The plurality of total reflection portions (320) may be arranged in an up-down, left-right, and right-hand direction (in a matrix). The plurality of total reflection portions (320) may correspond one-to-one with the plurality of light sources (100).

[0109] In this embodiment, since four light sources (100) are arranged per lens (300), the plurality of total reflection parts (320) are formed by four total reflection parts (320) corresponding one-to-one to the four light sources (100). However, the number of the plurality of total reflection parts (320) may be formed to be the same as the number of light sources (100) arranged per lens (300). For example, when at least one light source (100) is arranged per lens (300), the total reflection part (320) may be formed by at least one total reflection part (320).

[0110] An incident groove (325) may be formed on the rear side of the total reflection portion (320) into which light from a light source (100) is incident. An exit groove (315) may be formed on the front side of the base portion (310) opposite to the incident groove (325) into which light incident on the incident groove (325) is emitted.

[0111] The entrance groove (325) can be formed in a circular shape, and the exit groove (315) can be formed in an oval shape with a longitudinal diameter in the upper and lower directions.

[0112] The front surface of the entrance groove (325) may be formed as a curved surface that is convex toward the rear, and the rear surface of the exit groove (315) may be formed as a curved surface that is convex toward the rear. That is, a partition plate (not shown) that divides the entrance groove (325) and the exit groove (315) may be formed inside the lens (300). The partition plate may be arranged inside the total reflection section (320) among the base section (310) and the total reflection section (320). The partition plate may direct light incident on the entrance groove (325) straight to the exit groove (315). The front surface of the partition plate may be formed as a curved surface that is convex toward the rear, and the rear surface of the partition plate may be formed as a curved surface that is convex toward the rear. Here, the front surface of the partition plate, which is the rear surface of the exit groove (315), and the front surface of the entrance groove (325), which is the rear surface of the partition plate, may have different curvatures.

[0113] Light generated from a light source (100) can be transmitted to the front of the lens (300) through the exit groove (315) after being incident on the entrance groove (325) and passing through the lens (300).

[0114] Of course, the light from the light source (100) incident on the entrance groove (325) is not only distributed to the front of the lens (300) through the exit groove (315), but can also be distributed to the front of the lens (300) through a portion of the base portion (310) where the exit groove (315) is not formed.

[0115] In addition, light incident on the entrance groove (325) can be totally reflected at the outer surface of the total reflection part (320), which is the part where the medium of the light changes, and can be distributed to the front of the lens (300). That is, since the outer surface of the total reflection part (320) forms a boundary with the outside air, it becomes a part where the medium changes, and when light travels from a medium with a high refractive index to a medium with a low refractive index, if the incident angle is larger than the critical angle, the light incident on the entrance groove (325) can be totally reflected at a predetermined angle at the outer surface of the total reflection part (320) and distributed to the front of the lens (300).

[0116] The lens (300) can be mounted on the substrate (200). The lens (300) can be mounted on the substrate (200) and placed on the front surface of the substrate (200).

[0117] The lens (300) can be mounted on the substrate (200) via a spacer (500). Here, the spacer (500) can function to slightly space the lens (300) forward from the front surface of the substrate (200). As shown in FIG. 12, when the lens (300) is mounted on the substrate (200) via the spacer (500), the light source (100) positioned on the front surface of the substrate (200) can be positioned outside the entrance groove (325, see FIGS. 9 and 11) formed in the total reflection portion (320) of the lens (300).

[0118] A mounting portion (330) may be formed to protrude rearward on the rear surface of the base portion (310) of the lens (300), and the mounting portion (330) may be mounted to the substrate (200) via a spacer (500).

[0119] Of course, the mounting portion (330) may be mounted directly on the substrate (200) without the spacer (500). However, when the mounting portion (330) is mounted on the substrate (200) via the spacer (500), the front-to-rear distance between the light source (100) and the lens (300) can be easily adjusted, thereby easily adjusting the light distribution range of the light distributed in front of the lens (300). In order to easily adjust the front-to-rear distance between the light source (100) and the lens (300), the spacer (500) may include a plurality of spacers having different front-to-rear widths, and the mounting portion (330) of the lens (300) may be mounted on the substrate (200) using one of the plurality of spacers.

[0120] The mounting portion (330) may be formed to protrude rearwardly from the center of the rear surface of the base portion (310). The mounting portion (330) may be formed at the center of the rear surface of the base portion (310) formed by a plurality of total reflection portions (320). That is, the mounting portion (330) may be positioned between the plurality of total reflection portions (320). However, the position of the mounting portion (330) may vary among the rear surfaces of the base portion (310) depending on the number of total reflection portions (320).

[0121] An insertion projection (332) may be formed on the rear surface of the mounting portion (330), and an insertion groove (502) into which the insertion projection (332) is inserted may be formed on the front surface of the spacer (500). When the insertion projection (332) is inserted into the insertion groove (502), the rear surface of the mounting portion (330) may be in contact with the front surface of the spacer (500), and the outer surface of the insertion projection (332) may be in contact with the inner surface of the insertion groove (502).

[0122] When the insertion projection (332) is inserted into the insertion groove (502), in order to prevent the mounting portion (330) from rotating in the circumferential direction with respect to the spacer (500), the outer peripheral shape of the insertion projection (332) and the inner peripheral shape of the insertion groove (502) are formed to have the same shape, but it is preferable that they are formed to have a polygonal shape rather than a circle.

[0123] A fastening groove (316) and a first fastening hole (336) may be formed in the lens (300). The fastening groove (316) and the first fastening hole (336) may be connected front to back. The fastening groove (316) may be positioned in front of the first fastening hole (336), and the first fastening hole (336) may be positioned in the rear of the fastening groove (316).

[0124] The fastening groove (316) may extend from the front of the base portion (310) to the inside of the mounting portion (330). The first fastening hole (336) may extend from the rear of the fastening groove (316) to the rear of the insertion protrusion (332). The first fastening hole (336) may be formed to have a smaller diameter than the fastening groove (316).

[0125] A second fastening hole (506) may be formed in the spacer (500). The insertion groove (502) and the second fastening hole (506) may be connected front to back. The insertion groove (502) may be positioned in front of the second fastening hole (506), and the second fastening hole (506) may be positioned in the rear of the insertion groove (502).

[0126] The second fastening hole (506) may extend from the rear side of the insertion groove (502) to the rear side of the spacer (500). The second fastening hole (506) may be formed to have the same diameter as the first fastening hole (336) formed in the mounting portion (330). The second fastening hole (506) may be formed to have a diameter smaller than the minimum diameter of the insertion groove (502). When the insertion protrusion (332) of the mounting portion (330) is inserted into the insertion groove (502) of the spacer (500), the second fastening hole (506) may be in communication with the first fastening hole (336).

[0127] A fastening groove (206, see FIG. 7) may be formed on the front surface of the substrate (200). The fastening groove (206) may be formed as a fastening hole penetrating the front and rear surfaces of the substrate (200). The fastening groove (206) may have the same diameter as the second fastening hole (506) formed in the spacer (500). That is, the first fastening hole (336) formed in the mounting portion (330), the second fastening hole (506) formed in the spacer (500), and the fastening groove (206) formed on the front surface of the substrate (200) may have the same diameter. When the insertion projection (332) of the mounting portion (330) is inserted into the insertion groove (502) of the spacer (500) and the spacer (500) is mounted on the substrate (200), the first fastening hole (336), the second fastening hole (506), and the fastening groove (206) can be connected to each other.

[0128] The mounting portion (330) of the lens (300), the spacer (500), and the substrate (200) can be fastened to each other through a fastening member (600) made of a bolt or a screw. When the fastening member (600) fastens the mounting portion (330), the spacer (500), and the substrate (200), the head of the fastening member (600) can be placed in the fastening groove (316) of the lens (300), and the stem portion of the fastening member (600) passes through the first fastening hole (336) and the second fastening hole (506) and is fastened to the fastening groove (206) of the substrate (200), whereby the mounting portion (300) of the lens (300) can be fastened to the substrate (200) through the spacer (500). However, in the case where the fastening groove (206) of the substrate (200) is formed as a fastening hole that passes through the front and back, the end of the stem portion of the fastening member (600) may be protruded on the rear surface of the substrate (200), and the end of the stem portion of the fastening member (600) may be tapped or a nut may be fastened.

[0129] A plurality of assembly position alignment protrusions (505) may be formed around the second fastening hole (506) on the rear side of the spacer (500), and a plurality of assembly position alignment holes (205, see Fig. 7) may be formed on the substrate (200), into which a plurality of assembly position alignment protrusions (505) are each inserted around the fastening groove (206, see Fig. 7). The plurality of assembly position alignment holes (205) may be formed to be open to the front and rear of the substrate (200).

[0130] By inserting a plurality of assembly position alignment protrusions (505) into each of a plurality of assembly position alignment holes (205), the position at which the spacer (500) is assembled to the substrate (200) can be aligned, and when the spacer (500) is assembled to the substrate (200), the spacer (500) can be prevented from rotating in the circumferential direction.

[0131] In this embodiment, three assembly position alignment protrusions (505) are formed and three assembly position alignment holes (205) are formed. However, at least two assembly position alignment protrusions (505) may be formed and at least two assembly position alignment holes (205) may be formed.

[0132]

[0133] As described above, the lighting unit (50) according to the present invention and the lighting device (1) including the same have an inner visor (400) having a lens receiving chamber (410) formed with front and rear ends opened so that a lens (300) is inserted therein, and since the inner visor (400) absorbs light totally reflected by the lens (300), it can prevent glare from light radiating to the outside.

[0134]

[0135] Those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering the technical concept or essential characteristics thereof. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims that follow rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

[0136]

[0137] The present invention provides a lighting unit capable of preventing glare from light radiating to the outside by absorbing side light of a lens, and a lighting device including the same.

Claims

1. A substrate with a light source placed on the front; A lens arranged on the front surface of the substrate to totally reflect light from the light source; A lighting unit comprising an inner visor having an opening at the front and rear ends to form a lens receiving chamber into which the lens is inserted, and absorbing light totally reflected by the lens.

2. In claim 1, The above substrate is formed with at least the front surface being black, The inner visor is a lighting unit formed at least on the inner side in black.

3. In claim 2, A lighting unit in which the above substrate and the inner visor are formed in a black color by anodizing the surface.

4. In claim 1, The rear end of the inner visor is a lighting unit coupled to the substrate.

5. In claim 1, The above lens housing is a lighting unit formed in a square shape.

6. In claim 5, The above inner visor is a lighting unit including an upper part, a lower part, a left part, and a right part.

7. In claim 6, A lighting unit in which slits that are connected to each other are formed in the upper part, the lower part, the left part, and the right part.

8. In claim 4, At least one inner visor joint is protrudedly arranged on the front surface of the above substrate, At least one plate-shaped joining projection is formed at the rear end of the inner visor, A lighting unit in which at least one inner visor coupling portion has a slot formed into which at least one plate-shaped coupling protrusion is inserted and coupled.

9. In claim 1, The above lens, The base of the plate; and Includes a total reflection portion protrudingly formed on the rear surface of the base portion; An incident groove is formed on the rear surface of the above-mentioned total reflection section, into which light from the light source is incident. On the front side of the base portion opposite the above-mentioned entrance groove, an exit groove is formed through which light incident on the entrance groove is emitted. A lighting unit in which the outer surface of the above base part comes into contact with the inner surface of the above lens receiving chamber.

10. Heat dissipation housing; A light distribution cover covering the open front of the above heat dissipation housing; and A lighting unit disposed within the heat dissipation housing; The above lighting unit, A substrate with a light source placed on the front; A lens arranged on the front surface of the substrate to totally reflect light from the light source; A lighting device comprising an inner visor having an opening at the front and rear ends to form a lens receiving chamber into which the lens is inserted, and absorbing light totally reflected by the lens.

11. In claim 10, A lighting device in which the inner visor has a plurality of lens accommodation chambers formed in a grid shape.

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