Luminaire

Abstract

To provide a luminaire which is applicable to roads having different road shoulder widths and traffic lane widths.SOLUTION: A luminaire includes a casing, a window member, a light source module, a first reflection member and a second reflection member. The light source module includes a plurality of light emitting elements and a lens array. The plurality of light emitting elements is arrayed along a uniaxial direction inside the casing, and has an optical axis in the direction orthogonal to the uniaxial direction. The lens array includes a plurality of lens parts each of which has a lens surface that covers the plurality of light emitting elements individually and that further enhances the light distribution intensity in an oblique direction inclined by a predetermined angle to both sides in the uniaxial direction from the optical direction than the light distribution intensity in the optical axis direction. The first reflection member reflects the emission light from the light source module toward the window member at a first light distribution characteristic, and the second reflection member reflects the emission light from the light source module toward the window member at a second light distribution characteristic different from the first light distribution characteristic.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a lighting device used, for example, for highway lighting.

Background Art

[0002] As a lighting lamp installed on a highway or the like, generally, a method of illuminating a road from a high position using a pole is used. However, there are problems such as light leakage to the outside of the road in residential areas, installation costs, and high-altitude work. Therefore, in recent years, the development of a low-position lighting method in which lighting fixtures are installed at a low position of about 1 m from the road surface has been promoted.

[0003] As this type of low-position lighting device, for example, Patent Document 1 discloses a lighting device including a casing, a window member attached to the casing, and a base member installed inside the casing. The base member has a support plate portion having a support surface on which a plurality of light-emitting elements are mounted, a reflecting mirror portion integrally formed with the support plate portion for reflecting the emitted light from the plurality of light-emitting elements toward the window member, and a light-shielding plate portion integrally formed with the support plate portion for restricting the incidence of the emitted light from a predetermined direction to the window member.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in this type of lighting device, since the optimal light distribution varies depending on the shoulder width (or roadside strip width) and the lane width, there is a problem that it is necessary to prepare a plurality of types of lighting devices with different light distributions so as to be able to cope with the shoulder width and the like.

[0006] In view of the above circumstances, an object of the present invention is to provide a lighting device applicable to roads with different shoulder widths and lane widths.

Means for Solving the Problems

[0007] A lighting device according to one embodiment of the present invention includes a casing, a window member, a light source module, a first reflecting member, and a second reflecting member. The window member is attached to the casing. The light source module has a plurality of light emitting elements and a lens array. The plurality of light emitting elements are arranged along a uniaxial direction inside the casing and have optical axes in a direction orthogonal to the uniaxial direction. The lens array includes a plurality of lens portions each having a lens surface that individually covers the plurality of light emitting elements and enhances the light distribution intensity in an oblique direction inclined at a predetermined angle from the optical axis direction to both sides in the uniaxial direction rather than the light distribution intensity in the optical axis direction. The first reflecting member is disposed inside the casing and reflects a part of the light emitted from the light source module toward the window member with a first light distribution characteristic. The second reflecting member is disposed inside the casing and reflects another part of the light emitted from the light source module toward the window member with a second light distribution characteristic different from the first light distribution characteristic.

[0008] Since the above lighting device includes two reflecting members with different light distribution characteristics, it is applicable to roads with different shoulder widths and lane widths.

[0009] The first reflecting member may be configured to irradiate a reflection light to a region farther than the light reflected by the second reflecting member.

[0010] The light source module may further have a support plate portion that supports the plurality of light emitting elements and the lens array and is attached to the first reflecting member and the second reflecting member.

[0011] The casing may have a rear wall portion facing the window member, and the first reflecting member and the second reflecting member may each have a fixing plate portion fixed to the rear wall portion together with the support plate portion.

[0012] The first reflecting member and the second reflecting member may each have a reflecting surface with a curved surface shape having a uniform cross-sectional shape perpendicular to the uniaxial direction.

[0013] The casing may be installed with the uniaxial direction facing a direction parallel to the installation surface.

Effect of the Invention

[0014] According to the lighting device of the present invention, it is possible to provide a lighting device applicable to roads with different shoulder widths and lane widths.

Brief Description of the Drawings

[0015]

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Embodiments for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0017] <First Embodiment> FIG. 1 is a perspective view of a lighting device 100 according to an embodiment of the present invention, FIG. 2(A) is its front view, FIG. 2(B) is its bottom view, FIG. 2(C) is its side view, and FIG. 3 is its exploded perspective view. In FIGS. 1 and 3, the X - axis, Y - axis, and Z - axis indicate three mutually orthogonal axial directions. The X - axis corresponds to the left - right direction (width direction), the Y - axis corresponds to the front - rear direction, and the Z - axis corresponds to the height direction.

[0018] The lighting device 100 of the present embodiment is configured as a low - position lighting lamp installed, for example, on a highway or the like. The lighting device 100 includes a device main body 10 and a pair of legs 81, 82 that support the device main body 10. The device main body 10 has a casing 110, built - in components such as an optical unit 20, a terminal block 31, and a power supply unit 32 described later installed inside the casing 110, and a window member 120 that covers the inside of the casing 110.

[0019] FIG. 4 is a schematic plan view showing an example of installation of the lighting device 100 on a road. In the figure, W1 is a parapet wall, W2 is a median strip, Tz1 is a first traffic lane, Tz2 is a second traffic lane, and Rs is a roadside strip. As shown in the figure, a plurality of lighting devices 100 are installed on the parapet wall W1 at a predetermined interval in the vehicle traveling direction with the window member 120 facing the median strip W2 side. The lighting device 100 irradiates the emitted light L from the light source unit 20 through the window member 120 in a direction orthogonal to the traffic lanes Tz1 and Tz2 toward the median strip W2. The installation height of the lighting device 100 with respect to the parapet wall W1 is not particularly limited, and for example, it is 1.2 m. The lighting device 100 may be installed not only on the parapet wall W1 but also on the median strip W2.

[0020] [Overall Configuration of Lighting Device] FIG. 5 is a cross-sectional view taken along line A-A in FIG. 2(A). Hereinafter, the overall configuration of the lighting device 100 will be described with reference to FIG. 5 as well.

[0021] (Casing) The casing 110 has a substantially rectangular parallelepiped shape that is elongated in a uniaxial direction (X-axis direction). The casing 110 has a three-part structure including a main block 111 extending in the X-axis direction and a pair of side blocks 131 and 132 attached to both ends of the main block 111 in the X-axis direction. The main block 111 and the pair of side blocks 131 and 132 are made of a metal material such as an aluminum alloy, for example.

[0022] The main block 111 is formed in a substantially U-shaped cross-section having an upper wall portion S1 and a bottom wall portion S2 that are each elongated in the X-axis direction and a rear wall portion S3 (see FIG. 5). The main block 111 is composed of a molded body having a uniform cross-section perpendicular to the X-axis direction, and in this embodiment, it is manufactured by an extrusion molding method.

[0023] On one hand, the window member 120 is made of a translucent material such as tempered glass or tempered plastic having a long side in the X-axis direction. The window member 120 is formed in a shape similar to the front shape (the shape viewed from the X-axis direction) of the casing 110. The window member 120 is attached to the front side of the casing 110 so as to face the back wall portion S3 in the X-axis direction.

[0024] In this embodiment, the window member 120 is rotatably attached to the casing 110. A plurality of hinge members 71 for supporting the upper long side portion of the window member 120 are attached to the upper wall portion S1 of the casing 110 (main block 111). As a result, the inside of the apparatus main body 10 can be opened by rotating the window member 120, so that the maintainability of built-in components such as the optical unit 20, the terminal block 31, and the power supply unit 32 installed inside the apparatus main body 10 is ensured.

[0025] Also, a plurality of stoppers 72 that can latch the lower long side portion of the window member 120 are attached to the bottom wall portion S3 of the casing 110 (main block 111). The stopper 72 is composed of a ring portion attached to the casing 110 side and a hook portion attached to the window member 120 side, and the ring portion and the hook portion are engaged with each other at the position where the window member 120 closes the casing 110. Thereby, the inadvertent rotation of the window member 120 is prevented.

[0026] As shown in FIG. 1, a window portion W for transmitting the light emitted from the optical unit 20 is formed in the window member 120. The window portion W is a rectangle elongated in the X-axis direction and is partially formed in a region facing the optical unit 20 in the Y-axis direction. The region other than the window portion W of the window member 120 is covered with a black light-shielding layer Wb formed on the inner surface side of the window member 120. The light-shielding layer Wb is for preventing the region other than the region corresponding to the optical unit 20 in the casing 110 from being visible from the outside, and can be omitted as necessary depending on the size of the casing 110 or the optical unit 20.

[0027] As described above, the main block 111 of the casing 110 is formed of a molded body having a uniform cross-sectional shape in the X-axis direction. The main block 111 has seven guide grooves G1 to G7 extending parallel to the X-axis direction. Specifically, the guide grooves G1, G2, and G3 are formed on the inner surface side of the rear wall portion S3, and the guide grooves G4 and G5 are formed on the outer surface side of the bottom wall portion S2. The guide groove G6 is formed at the front end of the upper wall portion S1, and the guide groove G7 is formed at the front end of the bottom wall portion S2.

[0028] Each of the guide grooves G1 to G7 is formed over the entire width direction (X-axis direction) of the main block 111. Among these, the guide grooves G1 to G5 have a return portion that forms an opening width larger than the groove width, and are formed so as to be engageable with the heads of screw members or bolt members (hereinafter also referred to as fastening tools) that fit into the respective guide grooves. The guide grooves G6 and G7 form a housing portion for the seal ring 140 interposed between the main block 111 and the window member 120.

[0029] The guide grooves G1 to G3 are provided at intervals in the height direction (Z-axis direction) of the rear wall portion S3 of the main block 111. The heads of a plurality of fastening tools F1 (see FIG. 5) for fixing the upper ends of the optical unit 20 and the terminal block 31 respectively engage with the guide groove G1 located at the uppermost stage. The heads of a plurality of fastening tools for fixing the power supply unit 32 that supplies power to the optical unit 20 engage with the guide groove G2 located at the center. The heads of the fastening tools for fixing the lower end of the terminal block 31 engage with the guide groove G3 located at the lowermost stage. Each of the above fastening tools fixes the optical unit 20, the terminal block 31, and the power supply unit 32 to the guide grooves G1 to G3 by screwing a nut member N1 (see FIG. 5) onto their shaft portions.

[0030] Note that the power supply unit 32 is disposed between the optical unit 20 and the terminal block 31. The terminal block 31 electrically connects between the power supply cable inserted into the casing 110 through the bush B attached to one side block 131 and the power supply unit 32.

[0031] The guide grooves G4 and G5 are provided at intervals in the front-rear direction (Y-axis direction) of the bottom wall portion S2 of the main block 111. In each of the guide grooves G4 and G5, the head of a fastener F2 (see FIG. 5) for fixing a pair of leg portions 81 and 82 for installing the apparatus main body 10 on the retaining wall W1 engages. Each fastener F2 fixes the pair of leg portions 81 and 82 to the guide grooves G4 and G5, respectively, by screwing a nut member 2 (see FIG. 5) onto its shaft portion. Note that the pair of leg portions 81 and 82 are respectively fixed by two fasteners F2 facing each other in the front-rear direction. The lighting device 100 is installed via these pair of leg portions 81 and 82 with its longitudinal direction (X-axis direction) oriented parallel to the installation surface.

[0032] The main block 111 further has four screw receivers H1 to H4 extending parallel to the X-axis direction. Specifically, the screw receivers H1 to H4 have a partial cylindrical shape having an axis in the X-axis direction. The partial cylindrical shape means a cylindrical shape with a part of the circumference missing.

[0033] The screw receiver H1 is formed directly above the guide groove G1 in the rear wall portion S3. The screw receiver H2 is formed on the front side of the upper wall portion S1. The screw receiver H3 is formed at the boundary between the bottom wall portion S2 and the rear wall portion S3. The screw receiver H4 is formed on the front side of the bottom wall portion S2. These screw receivers H1 to H4 are formed over the entire width direction (X-axis direction) of the main block 111 and function as screw holes into which a plurality of screw members P for fixing a pair of side blocks 131 and 132 to both ends in the X-axis direction of the main block 111 are screwed.

[0034] The pair of side blocks 131 and 132 form both side walls of the casing 110 facing each other in the X-axis direction. The pair of side blocks 131 and 132 are attached to both ends in the X-axis direction of the main block 111 and each have an opening 13P having a shape corresponding to the both ends. Each opening 13P of the side blocks 131 and 132 is typically fixed to both ends of the main block 111 via a seal ring. The seal rings may each be composed of separate parts or may be integrally formed with the seal ring 140.

[0035] On the front ends of the pair of side blocks 131 and 132, guide grooves G8 and G9 for accommodating the folded-back portions at both ends in the X-axis direction of the seal ring 140 are respectively provided (see Fig. 3). The guide grooves G8 and G9 are continuously connected to the guide grooves G6 and G7 provided in the main block 111. Thereby, the seal ring 140 can be stably held between the casing 110 and the window member 120.

[0036] The pair of side blocks 131 and 132 have a plurality of screw insertion holes M (see Fig. 3) formed at positions corresponding to the screw receiving portions H1 to H4 of the main block 111. The pair of side blocks 131 and 132 are fixed by a plurality of screw members P inserted through the screw insertion holes M.

[0037] The apparatus main body 10 further includes a plurality of plug members T embedded in the screw insertion holes M of the side blocks 131 and 132. The plug member T functions as a seal member for preventing moisture such as raindrops from entering the apparatus main body 10 through the screw insertion holes M.

[0038] (Optical unit) Subsequently, the details of the optical unit 20 will be described.

[0039] The optical unit 20 is an illumination light source emitted from the illumination device 100. The optical unit 20 has a light source module 21 and a reflection member 22 respectively installed inside the casing 110 as shown in Figs. 3 and 5.

[0040] The light source module 21 has an LED substrate 211 on which a plurality of light emitting elements 210 are mounted, a lens array 212 for distributing the emitted light from each light emitting element 210, and a support plate portion 215 for supporting the LED substrate 211 and the lens array 212. Fig. 6(A) is a plan view seen from the light emitting surface of the light source module 21, and Fig. 6(B) is a side view thereof.

[0041] The plurality of light-emitting elements 210 are typically semiconductor light-emitting elements such as LEDs (Light Emitting Diodes), and the emission color is typically white. In this embodiment, an LED component that forms white light by combining a blue LED and a yellow phosphor that is its complementary color is adopted, but of course, it is not limited to this.

[0042] The LED substrate 211 is a rectangular circuit board having a long side in the longitudinal direction (X-axis direction) of the casing 110, and a plurality of light-emitting elements 210 are mounted on its surface. At the central portion in the width direction of the LED substrate 211, a plurality of female screw members 214 that are screwed to a plurality of fasteners F3 inserted through the support plate portion 215 are embedded at predetermined intervals in the long side direction. Also, at one end portion in the long side direction of the LED substrate 211, a connector 213 for connection with a wiring cable (not shown) extending from the power supply unit 32 is mounted.

[0043] In this embodiment, a plurality (two in this example) of LED substrates 211 are mounted on the support plate portion 215 in alignment in the X-axis direction so as to correspond to the number of the reflecting members 22 (see FIG. 9).

[0044] Each light-emitting element 210 is arranged in a single row at a predetermined interval along the long side direction (X-axis direction) on the LED substrate 211, but may be arranged in multiple rows. Each light-emitting element 210 has an optical axis in the normal direction of the LED substrate 211, that is, in a direction orthogonal to the longitudinal direction (X-axis direction) of the casing 110. The LED substrate 211 is fixed to the support plate portion 215 using a plurality of fasteners F3 with the mounting surface of the light-emitting element 210 facing downward, that is, toward the reflecting surface 221 of the reflecting member 22.

[0045] The lens array 212 has a plurality of lens portions 212a that individually cover the plurality of light-emitting elements 210. The lens array 212 is fixed on the LED substrate 211 using a plurality of fasteners or an adhesive 2 or the like.

[0046] FIG. 7 is an enlarged side view of a main part showing the light distribution characteristics along the X-axis direction of the emitted light transmitted through the lens portion 212a.

[0047] Each lens unit 212a includes an incident-side lens surface 212a1 that houses the light-emitting element 210, and an exit-side lens surface 212a2 that enhances the light distribution intensity in an oblique direction that is inclined at a predetermined angle to both sides in the left-right direction (X-axis direction) from the optical axis direction rather than the light distribution intensity in the optical axis direction of the light-emitting element 210. In the present embodiment, the incident-side lens surface 212a1 has a concave shape with a substantially semi-circular cross-section, and the exit-side lens surface 212a2 has a convex shape provided on both sides in the left-right direction with the optical axis direction interposed therebetween. Note that the shapes of the incident-side lens surface 212a1 and the exit-side lens surface 212a2 are not particularly limited, and can be arbitrarily designed as long as the above-described light distribution characteristics can be obtained.

[0048] The support plate portion 215 is formed of a molded body of a metal material such as an aluminum alloy having a uniform cross-sectional shape in the X-axis direction, and as shown in FIG. 5, has an inclined surface portion 215a that supports the LED substrate 211 and a vertical surface portion 215b that is fixed to the rear wall portion S3 of the casing 110. The inclined surface portion 215a extends so as to be inclined downward at a predetermined angle from the rear wall portion S3 side toward the window member 120, and the LED substrate 211 is attached to the lower surface side thereof. Thereby, it is possible to prevent the light source module 21 from being directly visible from the front of the lighting device 100, and it is possible to suppress the glare of the light when the vehicle occupant views the lighting device 100.

[0049] The reflecting member 22 functions as a reflector that supports the light source module 21 and has a reflecting surface 221 that reflects the light emitted from the light source module 21 toward the window member 120. In the optical unit 20 of the present embodiment, the reflecting member 22 has a first reflecting member 22A and a second reflecting member 22B.

[0050] FIG. 8 is a perspective view of the optical unit 20 viewed from the front direction, and FIG. 9 is a side view of the optical unit 20 viewed from the X-axis direction.

[0051] The first reflecting member 22A and the second reflecting member 22B are arranged adjacent to each other in the longitudinal direction (X-axis direction) of the casing 110. The first reflecting member 22A and the second reflecting member 22B extend in the width direction (X-axis direction) of the casing 110 and are formed of a molded body of a metal material such as an aluminum alloy having a uniform cross-sectional shape in the X-axis direction. In this embodiment, they are manufactured by an extrusion molding method.

[0052] The reflecting members 22A and 22B each have reflecting surfaces 221A and 221B that reflect the light emitted from the light source module 21 toward the window member 120 (window portion W). Both the reflecting surfaces 221A and 221B are formed as curved surfaces that are convex toward the back wall portion S3 having a uniform cross-sectional shape perpendicular to the longitudinal direction (X-axis direction) of the casing 110 (curved surface shape).

[0053] In the following description, the light source module 21 that emits illumination light toward the reflecting surface 221A of the first reflecting member 22A is also referred to as the first light source module 21A, and the light source module 21 that emits illumination light toward the reflecting surface 221B of the second reflecting member 22B is also referred to as the second light source module.

[0054] The reflecting surfaces 221A and 221B are subjected to surface treatments such as vapor deposition of a metal film, mirror finishing, or attachment of a metal foil or white PET (polyethylene terephthalate) to enhance the light reflectivity. Note that the other surfaces of the reflecting members 22A and 22B other than the reflecting surfaces 221A and 221B are colored black (for example, anodized treatment) to prevent the reflection of stray light inside the casing 110.

[0055] The reflecting members 22A and 22B further include a fixing plate portion 222, a reference surface portion 223, and a foot plate portion 224.

[0056] The fixing plate portion 222 is fixed to the back wall portion S3 of the casing 110 together with the support plate portion 215 of the light source module 21. The fixing plate portion 222 is fixed together with the support plate portion 215 by a fastener F1 so as to be sandwiched between the vertical surface portion 215b of the support plate portion 215 and the guide groove G1 of the back wall portion S3.

[0057] The reference surface portion 223 positions the light source module 21 by coming into contact with the support plate portion 215 of the light source module 21, and secures the target inclination of the LED substrate 211 and the relative distance with respect to the reflecting surface portions 221A and 221B. The reference surface portions 223 of the reflecting members 22A and 22B are formed so as to belong to the same plane.

[0058] The foot plate portion 224 is a flat plate portion provided so as to project from the back side of the reflecting members 22A and 22B toward the back wall portion S3 of the casing 110. The tip of the foot plate portion 224 is in contact with the inner surface of the back wall portion S3 (see FIG. 5), and thereby, the fixed posture of the reflecting members 22A and 22B (optical unit 20) within the casing 110 is maintained.

[0059] FIG. 10 is a ray tracing diagram of the illumination light L (reflected light by the first reflecting member) in the optical unit 20. As shown in the figure, the light emitted from the light source module 21 is reflected by the reflecting member 22 (second reflecting member 22A) toward the front direction of the illumination device 100, and is transmitted through the window member 120 and irradiated to the outside.

[0060] In the present embodiment, since the reflecting surfaces 221 of the reflecting members 22A and 22B are formed in a curved shape, almost all of the light emitted from the light source module 21 can be reflected in the front direction, and thereby, the light utilization efficiency can be increased. Further, since the reflecting surfaces 221A and 221B are formed in a curved shape, the light emitted from the light source module 21 can be irradiated to a predetermined irradiation range over a predetermined angle range in the vertical direction (height direction) of the illumination device 100.

[0061] Further, in the present embodiment, since the light source module 21 includes the lens array 212 that emits the light emitted from each light emitting element 210 in an oblique direction with a higher light distribution intensity than the optical axis direction thereof, the illuminance in the left - right direction (width direction) of the illumination device 100 along the longitudinal direction of the casing 110 increases. Thereby, the installation interval of the illumination device 100 can be increased.

[0062] FIG. 11(A) is an illuminance distribution diagram in the left-right direction of the lighting device 100. For comparison, FIG. 11(B) shows an illuminance distribution diagram when the lens array 212 is omitted from this lighting device 100. As shown in FIG. 11(A), according to this embodiment, it can be seen that the irradiation range of light in the left-right direction is greatly expanded compared to the case without a lens array (FIG. 11(B)). Thereby, the interval D (see FIG. 4) between the lighting devices 100 installed on the road along the vehicle traveling direction can be expanded, and the number of installed lamps can be reduced.

[0063] In addition, due to the installation of the lens array 212, light emitted from both ends in the width direction of the lighting device 100 is irradiated onto the road surface (especially the road surface near the lighting device 100) as light with a yellowish tint due to the color separation action of the lens array 212, which may cause color unevenness of the illumination light on the road surface. To solve this, in this embodiment, as shown in FIG. 5, uneven portions 221a are locally provided in a part of the region on the fixed plate portion 222 side of the reflecting surface 221. The uneven portions 221a are formed by convex surfaces having a partial spherical shape extending in the left-right direction (X-axis direction) of the casing 110.

[0064] The uneven portions 221a are provided at positions where light emitted from both ends of the light source module 21 reaches, and as shown in FIG. 10, the light incident on the uneven surface 221a is raised and reflected in the front direction. Thereby, the emitted light (light with a yellowish tint) separated in color at both ends of the lens array 212 is reflected forward (in the front direction), so that the occurrence of color unevenness on the road surface near the lighting device 100 is suppressed.

[0065] Both the first reflecting member 22A and the second reflecting member 22B have the same configuration, but the light reflection characteristics (light distribution characteristics) are different from each other on the reflecting surfaces 221A and 221B. In this embodiment, the first reflecting member 22A is configured as a reflecting member for a narrow road shoulder having a first light distribution characteristic with a relatively narrow width of the road shoulder (or roadside strip; the same applies hereinafter), for example, 0.5 m. On the other hand, the second reflecting member 22B is configured as a reflecting member for a wide road shoulder having a second light distribution characteristic with a relatively wide width of the road shoulder, for example, 2 m.

[0066] More specifically, in the present embodiment, as shown in FIG. 10, the reflection surface 221A of the first reflection member 22A is designed such that the incident angle of the light emitted from the light source module 21 with respect to the reflection surface 221A of the first reflection member 22A (the incident angle with respect to the normal direction of the reflection surfaces 221A and 221B) is larger than that of the reflection surface 221B of the second reflection member 22B, and the curvatures of both reflection surfaces 221A and 221B are designed accordingly.

[0067] As a result, the first reflection member 22A reflects the light emitted from the light source module 21 toward the window member 120 at a larger reflection angle than the second reflection member 22B, and the second reflection member 22B reflects the light emitted from the light source module 21 toward the window member 120 at a smaller reflection angle than the first reflection member 22A. As a result, the light reflected by the second reflection member 22B is irradiated onto a region farther away than the light reflected by the first reflection member 22A. Thus, the lighting device 100 of the present embodiment is configured to irradiate combined light of the reflected light by the first reflection member 22A and the second reflection member having different reflection characteristics from each other.

[0068] The light source module 21 is divided into a first light source module 21A and a second light source module 22B so as to correspond to the first reflection member 22A and the second reflection member 22B. Each of the light source modules 21A and 21B has the same configuration and is positioned via the reference surface portion 223 of each reflection member 22A and 22B adjacent to each other in the width direction (X-axis direction) of the casing 110 (see FIG. 12). Since each reference surface portion 223 is formed so as to belong to the same plane, the light source modules 21A and 21B are also arranged on the same plane.

[0069] FIG. 12(A) shows an example of the illuminance distribution of the light reflected by the first reflection member 22A, and FIG. 12(B) shows an example of the illuminance distribution of the light reflected by the second reflection member 22B. Further, FIG. 13 is an illuminance distribution diagram of the combined light of the reflected light by the first reflection member 22A and the reflected light by the second reflection member 22B.

[0070] As described above, according to this embodiment, a single lighting device 200 can be applied to different uses for narrow road shoulders and wide road shoulders. Further, by mounting the reflecting members 22A and 22B having different light distribution characteristics, there is an advantage that the illuminance of the first traffic lane Tz1 and the second traffic lane Tz2 can be made uniform. Furthermore, according to this embodiment, by applying it to the lighting of the curved area of the road, for example, there is an advantage that the lighting light can be emitted over a wider range on the exit side of the curve.

[0071] As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made.

[0072] For example, in the above embodiment, the lighting device 100 is configured as a low-position lighting device for a lane such as a highway. However, the present invention is not limited to this, and the present invention is also applicable as a lighting device for advertisements, exhibits, and the like.

[0073] Further, in the above embodiment, the lighting device 100 including the two reflecting members 22A and 22B having different reflection characteristics (light distribution characteristics) has been described. However, the number of reflecting members is not limited to two, and may be three or more. Furthermore, the arrangement direction of each of the reflecting members 22A and 22B is not limited to the case where it is in the longitudinal direction (X-axis direction) of the casing 110, and may be arranged in the height direction (Z-axis direction) of the casing 110. In this case, the light source modules 21A and 21B are also arranged in the above height direction.

[0074] Furthermore, in the above embodiment, the reflecting surfaces of the respective reflecting members are installed with different curvatures (or inclinations). However, the present invention is not limited to this, and as long as different light distribution characteristics can be obtained, such as forming one of the reflecting surfaces as a flat surface or forming it with materials having different reflectivities, the difference in the configuration of these reflecting surfaces is not particularly limited.

Description of Reference Numerals

[0075] 10... Device main body 20, 220... Optical unit 21, 21A, 21B... Light source module 22, 22A, 22B... Reflecting member 81, 82… Foot portion 100, 200… Lighting device 110… Casing 120… Window member 210… Light emitting element 211… LED substrate 212… Lens array 215… Support plate portion 221, 221A, 221B… Reflective surface 222… Fixed plate portion S3… Rear wall portion

Claims

1. A casing, a window member attached to the casing, a plurality of light-emitting elements arranged along a uniaxial direction inside the casing and having optical axes in a direction orthogonal to the uniaxial direction, and a lens array having a plurality of lens portions including lens surfaces that individually cover the plurality of light-emitting elements and enhance the light distribution intensity in an oblique direction inclined by a predetermined angle from the optical axis direction to both sides in the uniaxial direction rather than the light distribution intensity in the optical axis direction, a first reflecting member disposed inside the casing and reflecting a part of the light emitted from the light source module toward the window member with a first light distribution characteristic, a second reflecting member disposed inside the casing and reflecting another part of the light emitted from the light source module toward the window member with a second light distribution characteristic different from the first light distribution characteristic A lighting device comprising the same.

2. The lighting device according to Claim 1, wherein the first reflecting member is disposed adjacent to the second reflecting member in the uniaxial direction A lighting device.

3. The lighting device according to Claim 1, wherein the first reflecting member irradiates a reflection light to a region farther than the light reflected by the second reflecting member A lighting device.

4. The lighting device according to Claim 3, wherein the light source module further has a support plate portion that supports the plurality of light-emitting elements and the lens array and is attached to the first reflecting member and the second reflecting member A lighting device.

5. The lighting device according to Claim 1, wherein the casing has a back wall portion facing the window member, and the first reflecting member and the second reflecting member each have a fixing plate portion fixed to the back wall portion together with the support plate portion A lighting device.

6. The lighting device according to Claim 1, wherein the first reflecting member and the second reflecting member each have a reflecting surface having a curved surface shape with a uniform cross-sectional shape perpendicular to the uniaxial direction A lighting device.

7. The lighting device according to any one of Claims 1 to 6, wherein the casing is installed with the uniaxial direction facing a direction parallel to the installation surface A lighting device.

Images