Light source module array

Abstract

To provide a light source module array capable of improving decorativeness.SOLUTION: A light source module array according to one embodiment of the present invention is an array body of a plurality of light source modules, each of which has one or more light-emitting elements, a lamp part that houses the light-emitting elements, and an optical lens that has a front surface part that is a light emission surface and a peripheral surface part and is attached to the lamp part, and the plurality of light source modules include a light source module whose front surface part is hexagonal when viewed from a first direction perpendicular to the front surface part.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a light source module array constituting a lighting device for use in, for example, a railway vehicle. [Background technology]

[0002] Known examples of lighting devices for railway vehicles include headlights and taillights that are equipped on railway vehicles. Headlights, referred to as front marker lights in relevant railway regulations, illuminate the front of the vehicle in the direction of travel at night, improving the driver's visibility and allowing the light to be confirmed from the front of the vehicle at night. Taillights, referred to as rear marker lights in relevant railway regulations, indicate the rear of the vehicle with light or reflection, thereby informing other vehicles traveling behind the vehicle of its presence.

[0003] Due to the differences in functions mentioned above, headlights and taillights differ in their main components, light distribution characteristics and light color. That is, headlights are required to have long-distance light distribution characteristics to illuminate the road ahead, and the light color is generally set to white. Meanwhile, taillights are sufficient to have short-distance light distribution characteristics that are visible from the outside, and the light color is set to red. Therefore, headlights and taillights are generally configured with separate lamps.

[0004] For example, Patent Document 1 describes a headlamp for a railway vehicle that has a headlamp with a plurality of LED power sources and a rectangular tail light. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2012-238484 A Summary of the Invention [Problem to be solved by the invention]

[0006] In recent years, there has been a demand for improved decorativeness of marker lights in lighting devices for railway vehicles. In other words, this type of lighting device is required to function not only as a marker light but also as a decorative light. However, the headlight described in Patent Document 1 is shaped to fit into a rectangular opening, making it difficult to enhance decorativeness.

[0007] In view of the above circumstances, an object of the present invention is to provide a light source module array that can improve decorativeness. [Means for solving the problem]

[0008] A light source module according to one aspect of the present invention is a light source module array which is an array of a plurality of light source modules each having one or more light emitting elements, a lamp part which houses the light emitting elements, and an optical lens which has a front part which is a light emitting surface and a peripheral part and is attached to the lamp part, The plurality of light source modules includes a light source module whose front surface is hexagonal when viewed from a first direction perpendicular to the front surface.

[0009] In the light source module array, the plurality of light source modules include a light source module whose front surface is hexagonal when viewed from the first direction. In other words, by making the lens shape of the plurality of light source modules hexagonal, it is possible to provide a design when arranging them.

[0010] The multiple light source modules may include one or more first light source modules arranged on a first plane parallel to the front portion, the front portion of which is hexagonal when viewed from the first direction, and one or more second light source modules arranged on a second plane parallel to the first plane and different from the first plane, adjacent to the first light source modules when viewed from the first direction, and the front portion of which is hexagonal.

[0011] the plurality of light source modules includes three or more of the first light source modules; At least one side of each of the plurality of first light source modules may face a mutually opposing side when viewed from the first direction.

[0012] The plurality of first light source modules may be arranged in an aligned manner along a direction perpendicular to opposing sides of the plurality of first light source modules.

[0013] The plurality of light source modules may be arranged in a staggered or honeycomb pattern when viewed from the first direction.

[0014] a base member for supporting the plurality of light source modules; The base member may have a stepped shape and have a first support surface that supports the first light source module and forms the first plane, and a second support surface that supports the second light source module and forms the second plane.

[0015] The light source module array may be a marker light for a rail vehicle.

[0016] the light incident surface portion has a condenser lens facing the first light emitting element, The optical lens may further have a lens body having a light incident surface portion into which light emitted from the one or more first light-emitting elements is incident, a first total reflection surface portion that totally reflects the light incident from the light incident surface portion toward the peripheral surface portion, and a second total reflection surface portion provided on the peripheral surface portion that raises the light totally reflected by the first total reflection surface portion toward the front surface portion. Effect of the Invention

[0017] According to the light source module array of the present invention, the plurality of light source modules include a light source module whose front portion is hexagonal when viewed from the first direction, so that the light source modules can be arranged with a sense of design. [Brief description of the drawings]

[0018] [Figure 1]1 is a schematic plan view of a lighting device according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is an overall view showing a light source module in a lighting device, where (A) is an oblique view, (B) is a front view seen from the Z-axis direction, (C) is a rear view, (D) is a plan view, and (E) is a right side view. [Diagram 3] FIG. 2 is an exploded perspective view of the light source module. [Figure 4] 1A is a front view, FIG. 1B is a right side view, and FIG. 1C is a right sectional view. [Diagram 5] FIG. 2 is a front view of the lamp body housing a light source. [Figure 6] FIG. 2 is a rear perspective view of a light source module in the lighting device. [Figure 7] 2A and 2B are cross-sectional views of the light source module, where (A) is a cross-sectional view taken along line A-A in FIG. 2B, and (B) is a cross-sectional view taken along line B-B in FIG. 2B. [Figure 8] FIG. 2 is an overall perspective view of a light source module array. [Figure 9] FIG. 2 is a partial perspective view of a light source module array. [Figure 10] FIG. 2 is a side view of a light source module array. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0020] 1 is a schematic plan view of an illumination device 100 according to a first embodiment of the present invention. In the figure, an X-axis, a Y-axis, and a Z-axis indicate three mutually orthogonal axial directions, and the Z-axis corresponds to the optical axis direction of the illumination device 100.

[0021] <First embodiment> [Overall configuration of lighting equipment] The lighting device 100 of this embodiment is configured as, for example, a front marker lamp or a rear marker lamp for a railway vehicle. The lighting devices 100 are attached to any position at the front of the leading vehicle or at the rear of the last vehicle, as a pair on the left and right with the optical axis direction (Z-axis direction) facing forward or backward. That is, FIG. 1 shows one of the pair of lighting devices.

[0022] As shown in FIG. 1, the lighting device 100 includes a plurality of light source modules 10 and a base member 20 that commonly supports the plurality of light source modules 10.

[0023] The light source modules 10 include a first light source module 11 for headlights, a second light source module 12 for headlights, and a light source module 14. The first light source module 11 for headlights and the second light source module 12 for headlights function as headlights, and in particular, the first light source module 11 for headlights is for high beams, and the second light source module for headlights is for low beams. The light source module 14 functions as a taillight.

[0024] In this embodiment, the three types of light source modules 11, 12, and 14 are used in multiple numbers, but the number and layout of the modules are not particularly limited. It is not limited to this, and each light source module may be used singly, or a single light source module may be combined with multiple light source modules. The multiple light source modules 10 are composed of three types of light source modules 11 to 12, and 14, but may be composed of two types of light source modules, for example, a light source module for a headlight and a light source module for a taillight, or two types of light source modules for low beam (headlight) and high beam (headlight). The multiple light source modules 10 may be composed of four or more types of light source modules.

[0025] The multiple light source modules 10 are attached on a base member 20 with their optical axes facing the Z-axis direction. The base member 20 is composed of a combination of a first base plate 21, a second base plate 22, and a third base plate 24. The first to third base plates 21, 22, and 24 are each composed of a folded and pressed product of a metal plate such as an aluminum alloy or stainless steel. The third base plate 24 that supports the light source modules 14 will be described later.

[0026] (Light source module) The light source module 14 will be described below. Fig. 2 is an overall view showing the light source module 14, where (A) is a perspective view, (B) is a front view seen from the Z-axis direction, (C) is a rear view, (D) is a plan view, and (E) is a right side view, and Fig. 3 is an exploded perspective view of the light source module 14. Fig. 4 is an overall view of the lamp body 61 of the light source module 14, where (A) is a front view, (B) is a right side view, and (C) is a right cross-sectional view. Fig. 5 is a front view of the lamp body 61 that houses the light source 43'. Fig. 6 is a rear perspective view of the light source module 14 in the lighting device 100.

[0027] The light source module 14 includes an optical lens 54, a lamp body 64 (lamp body component), and a light source 44 housed inside the lamp body 64 and having one or more first light emitting elements 441A.

[0028] <Optical lenses> The optical lens 54 is made of transparent glass or plastic material. The optical lens 54 has a lens body 540 having a roughly rectangular parallelepiped shape including a rectangular front surface portion 541 and a planar peripheral surface portion 542. The lens body 540 protrudes in the Z direction from one end of the lamp body 63 (61), and the front surface portion 541 and the peripheral surface portion 542 are each configured as a light emission surface that emits light from the light source 43' forward (in the Z-axis direction) and around it. The cross-sectional shape of the lens body 540 perpendicular to the Z-axis direction is hexagonal, and the shape of the front surface portion 541 as viewed from the Z-axis direction is also hexagonal. The front surface portion 541 has a structure surface 541A in which a plurality of fine pyramids or the like that diffuse the light emitted from the light source are arranged in the surface. A bottomed hole (cone) 543 recessed toward the lamp body 63 (61) is provided in the center of the front surface 541, and lens surfaces 544 are provided on the bottom 543A of the hole 543 and its surroundings (side surfaces) 543B, and it also functions as a light guiding section that guides light emitted from the light source 43' to the front surface 531 and peripheral surface 532.

[0029] The optical lens 54 further has an annular protrusion 545 that fits into an opening 613 provided at one end of the lamp body 63 (61). The annular protrusion 545 has a cylindrical shape and is integrally formed on the back surface of the lens body 540 on the opposite side to the front surface 541. The annular protrusion 545 has a cylindrical portion 546 that fits into the opening 613 of the lamp body 63 (61), and an annular groove portion 547 provided around the Z-axis direction (optical axis direction) along the outer circumferential surface of the cylindrical portion 546.

[0030] Furthermore, on the rear surface of the lens body 540, on the outer circumferential side of the annular protrusion 545, there is provided an annular abutment surface 548 parallel to the XY plane that abuts against the opening end 614, which is the one end of the lamp body 63 (61). An engagement recess 549 that engages with an engagement protrusion 615 (see FIG. 3) provided on the opening end 614 of the lamp body 63 (61) is provided in a part of the abutment surface 548 (see FIG. 2(D)). The engagement recess 549 is formed with a depth greater than the height of the engagement protrusion 615 from the opening end 614. A detailed description of the function of the optical lens as a light guiding section will be given later.

[0031] <Light body> The light body 61 is made of a metal material such as an aluminum alloy or stainless steel. The light body 61 is cylindrical with one end open and has a bottom, a bottom 611, a tubular portion 612, and an opening 613 (see FIG. 4). The annular projection 545 of the optical lens 54 fits into the opening 613, so that the abutment surface 548 of the optical lens 54 abuts against the open end 614. At this time, the optical lens 54 is positioned in its circumferential direction relative to the light body 61 by the engagement between the engagement projection 615 provided on the open end 614 and the engagement recess 549 provided on the abutment surface 548.

[0032] The lamp body 61 includes a plurality of fasteners S1 that are inserted from the cylindrical portion 612 toward the bottom of the groove portion 547 of the annular protrusion 545 in a direction perpendicular to the optical axis direction (Z-axis direction). The fasteners S1 are configured as fasteners that fix the annular protrusion 545 to the opening 613. The cylindrical portion 612 is provided with a plurality of insertion holes (screw holes) 616 through which the fasteners S1 penetrate. The fasteners S1 are inserted from the cylindrical portion 612 toward the bottom of the groove portion 611 in a direction perpendicular to the axial direction. The number and locations of the insertion holes 616 are not particularly limited, and may be provided in three or more locations at equal angular intervals, for example. This allows the annular protrusion 545 of the optical lens 54 to be stably held in the opening 613 of the lamp body 61.

[0033] The interior of the lamp body 61 forms a space for accommodating the light source 43'. The light source 43' is composed of a board unit having red LEDs 441A, 441B, which are a plurality of light-emitting elements, and a circuit board 442 supporting the red LEDs 441A, 441B. The circuit board 442 is roughly rectangular, and the red LEDs 441A, 441B are mounted at the center of the front side of the circuit board 442, and a connector part (not shown) for connecting to a power supply cable is mounted on the rear side of the circuit board 442. The inner peripheral surface of the cylindrical part 612 of the lamp body 61 is provided with a plurality of engagement parts 617 that engage with the peripheral edge of the circuit board 442 to position the light source 43' in the circumferential direction.

[0034] 5, in this embodiment, the engagement portions 617 are provided at three locations on the inner circumferential surface of the cylindrical portion 612 so as to engage with both ends of the upper side and the center of the lower side of the circuit board 442 of the light source 43'. However, the present invention is not limited to this, and the engagement portions 617 may be provided at positions to engage with the four corners of the circuit board 442.

[0035] The bottom 611 of the lamp body 61 is provided with a window 618 through which the connector parts of the light source 43' positioned by the engagement portion 617 pass, and the outer surface of the bottom 611 is provided with heat dissipation fins 619 for improving the heat dissipation properties of the light source 43'.

[0036] The bottom portion 611 and the cylindrical portion 612 of the light body 61 respectively have a first fixing portion 621 and a second fixing portion 622 connectable to the base member 20 (the third base plate 24).

[0037] The first fixing portion 621 is a screw insertion hole provided immediately below the window portion 618 in the bottom portion 611 as shown in FIG. 4(C), and is fixed by screws to the first support surface 241 to the sixth support surface 246 of the third base plate 24. In this case, an opening capable of accommodating the heat dissipation fin 619 of the light body 61 is provided in the third base plate 24, so that the back surface of the bottom portion 611 is in close contact with the third base plate 241. Also, as shown in FIG. 4(C), a positioning protrusion 620 may be provided on the outer surface of the bottom portion 611 to fit into a hole formed immediately above the opening of the third base plate 241. This allows the light body 61 to be stably fixed to the third base plate 24 perpendicular to the optical axis direction.

[0038] The second fixing portion 622 is a screw insertion hole provided in a part of the cylindrical portion 612 as shown in Fig. 4(C), and is screwed to a supporting side surface (not shown) provided along the Z-axis direction of the third base plate 24. In this case, the light body 61 can be fixed to the third base plate 24 parallel to the XY directions. A plurality of second fixing portions 622 may be provided. In this case, as shown in Fig. 4(C), the insertion hole 616 through which the fastener S1 for fixing the annular protrusion 545 of the third optical lens 54 to the opening 613 of the light body 61 is inserted may also be used as the second fixing portion 622.

[0039] As shown in FIG. 3, the light source module 14 further includes an annular elastic member 70 mounted between the annular protrusion 545 of the optical lens 54 and the light source 43', and a heat transfer sheet 80 disposed between the light source 43' and the bottom 611 of the lamp body 61.

[0040] The elastic member 70 is an annular elastic sheet having an outer diameter and an inner diameter substantially equal to the outer diameter and the inner diameter of the annular protrusion 545, and is sandwiched between the tip of the annular protrusion 545 and the light source 43' (circuit board 442). The elastic member 70 is in close contact with the periphery (four corners) of the circuit board 442 as shown in Fig. 5. This allows the light source 43' (circuit board 442) to be stably held inside the light body 61 when the optical lens 544 is attached to the light body 61.

[0041] The heat transfer sheet 80 is a circular sheet having almost the same shape as the inner surface of the bottom 611 of the lamp body 61. The heat transfer sheet 80 is made of a material having electrical insulation and thermal conductivity. As shown in FIG. 3, the heat transfer sheet 80 has an opening 81 through which the connector part of the light source 43' passes, and a number of notches 82 that accommodate a number of engagement parts 617 that position the light source 43' in its circumferential direction. This allows for good adhesion between the circuit board 442 and the bottom 611, thereby improving the heat dissipation of the light source 43'.

[0042] <Light source> As described above, the light source 43' is composed of a board unit having red LEDs 441A, 441B which are a plurality of light-emitting elements, and a circuit board 442 which supports the plurality of red LEDs 441A, 441B, as shown in Fig. 3. The circuit board 442 is roughly circular, and the red LEDs 441A, 441B are mounted on the front side of the circuit board 442, and a connector part which is connected to a power supply cable is mounted on the rear side of the circuit board 442. The peripheral portion of the circuit board 442 is provided with a plurality of notches 444 which engage with a plurality of engagement portions 617 provided on the inner peripheral surface of the cylindrical portion 612 of the lamp body 61.

[0043] [Light source module details] The above describes the light source module 14. The optical lens 54 of the light source module 14 will now be described in detail.

[0044] As described above, optical lens 54 has lens body 540 and annular protrusion 545. Lens body 540 has light incident surface 544a on which light emitted from first light emitting element 441A and second light emitting element 441B is incident, front surface 541 which is a light emitting surface as described above, peripheral surface 542, first total reflection surface 5441B which totally reflects at least a part of the light incident from light incident surface 544a toward peripheral surface 542, and second total reflection surface 5421 which is provided on peripheral surface 542 and causes the light totally reflected by first total reflection surface 5441B to rise toward front surface 541.

[0045] The light incident surface portion 544a is formed on the opposite side of the front surface portion 541 in the lens body 540, at a position facing the first light emitting element 441A and the second light emitting element 441B. The light incident surface portion 544a has a condenser lens 5451 provided at a position facing the first light emitting element 431A located at the center of the lens body 530 in the Z axis direction, a plurality of light incident opposing surfaces 5452B facing the second light emitting element 441B in the Z axis direction, and a light incident recess 5452B provided between the plurality of light incident opposing surfaces 5452A (in the circumferential direction as viewed from the Z axis direction) (see FIGS. 2(B) and (D)).

[0046] 2 and 3, in this embodiment, one first light-emitting element 441A is located at the center of lens body 540 when viewed from the Z-axis direction. One first light-emitting element 441A is provided to face condenser lens 5451. As shown in FIGS. 2 and 6, condenser lens 5451 is a convex lens that protrudes from light incident surface portion 544a toward first light-emitting element 441A. This makes it possible to condense light emitted from first light-emitting element 441A, as described later.

[0047] As shown in FIGS. 2 and 3, in this embodiment, eight second light emitting elements 441B are provided around the first light emitting element 441A as viewed from the Z-axis direction. As shown in FIG. 2, the eight second light emitting elements 441B are provided along the circumferential direction of a circle centered on the first light emitting element 441A and face the light incident surface facing portions 5452A. The eight second light emitting elements 441B are equally spaced from each other. As shown in FIGS. 2 and 6, the light incident facing portions 5452A are provided along the circumferential direction at equal intervals and inclined at a predetermined angle in the XY plane, and have a function of controlling the angle at which light emitted from the second light emitting element 441B is refracted. In other words, the light incident facing portions 5452A have a function of refracting the light emitted from the second light emitting element 441B.

[0048] 6 and 7, the light inclination surface portion 5452C is provided in an annular shape, and is shaped like a letter V (widened toward the center of the lens body 540) when viewed from the X-axis direction. The light inclination surface portion 5452C has a function of controlling the light emitted from the second light-emitting element 441B to illuminate the center of the lens body 530 (when viewed from the Z-axis direction) of the front surface portion 541 (for example, the left two in L1′ of FIG. 7(A)).

[0049] 2 and 6, the light incident recesses 5452B provided between the multiple light incident opposing surfaces 5452A are formed to be recessed from the light incident surface portion 544a toward the front surface portion 541. The light incident recesses 5452B are provided at equal intervals along the circumferential direction and have the function of collecting light emitted from the second light emitting element 441B.

[0050] Of course, the number and arrangement of the first light emitting element 441A and the second light emitting element 441B are not limited to this, and may be variously configured. For example, the number of second light emitting elements 441B may be four instead of eight around the first light emitting element 441A provided at the center.

[0051] Light L1, which is a part of light emitted from first light-emitting element 441A provided at the center of circuit board 442, passes through lens body 540 and bottom 543A of hole 543 via second condenser lens 5451 facing first light-emitting element 441A (see FIG. 7). Here, light L1 is light that is emitted from first light-emitting element 441A along the Z-axis direction, travels straight in the Z-axis direction perpendicular to bottom 533A, and passes through lens body 530.

[0052] Also, light L1' emitted from second light-emitting element 441B provided around first light-emitting element 441A is incident on light incident surface portion 544a (light incident facing surface 5452A and light incident recessed portion 5452B) and passes through lens body 540. At this time, light L1' is diffused by structure surface 541A. That is, light L1, L1' emitted from second light-emitting element 441B as viewed from the Z-axis direction is emitted from the center and its periphery of lens body 540. Also, light L1, L1' emitted from second light-emitting element 441B is not totally reflected by first total reflection surface portion 544A and second total reflection surface portion 5421 as described later.

[0053] Also, light L2, which is a part of the light emitted from first light emitting element 441A, travels straight along a direction inclined at a predetermined angle from the Z-axis direction, is collected by second collecting lens 5451, and travels in a direction parallel to the Z-axis direction (toward first total reflection surface portion 544A) as shown in FIG. 7(B). Next, light L2 is totally reflected by first total reflection surface portion 544A to peripheral surface portion 542 of lens body 540, and the totally reflected light L2 is totally reflected by second total reflection surface portion 5421 provided on peripheral surface portion 542 toward front surface portion 541. The light L1' incident on hole portion 543 and light L2 have different angles of incidence on first total reflection surface portion 544A. That is, light L2 is totally reflected by controlling the angle of incidence on first total reflection surface portion 544A by second collecting lens 5451.

[0054] First total reflection surface portion 544A will be described. First total reflection surface portion 544A is provided at the center of lens body 540 when viewed from the Z-axis direction, and is formed on side surface 543B of hole portion (cone portion) 543 having an approximately conical shape (more specifically, a stepped shape) whose inner diameter becomes smaller as it approaches light incident surface portion 544a from front surface portion 541. Specifically, first total reflection surface portion 544A has a stepped shape in which first total reflection surfaces 5441A and straight portions 5442A are alternately arranged along the Z-axis direction.

[0055] 7, first total reflection surface 5441A has a plurality of inclined surfaces inclined toward the center of lens body 540, and the inner diameters of first total reflection surfaces 5441A (inner diameters of hole portions 543 including first total reflection surfaces 5441A) of first total reflection surfaces 5441A become smaller toward light incident surface portion 544a from front surface portion 541. In addition, the inclination angles of first total reflection surfaces 5341A may be different from one another or may be the same.

[0056] 7, straight line portion 5442A is a side surface extending from a lower end of first total reflection surface 5441A along the Z-axis direction to light incident surface portion 544a. That is, first total reflection surface 5441A and straight line portion 5442A form a stepped shape. In this embodiment, there are multiple straight line portions 5442A, and the inner diameter of straight line portion 5442A (the inner diameter of hole portion 543 including straight line portion 5442A) becomes smaller from front surface portion 541 toward light incident surface portion 544a.

[0057] That is, as described above, by forming first total reflection surface portion 544A, which totally reflects light L2 emitted from first light emitting element 441A, in a stepped shape, it is possible to suppress the radial spread of first total reflection surface 5441A. This makes it possible to increase front surface portion 541 (structure surface 541A) (light emitting area), which is the light emitting surface.

[0058] Next, second total reflection surface portion 5421 will be described. Second total reflection surface portion 5421 is provided on inclined surface 542A narrowing from front surface portion 541 of peripheral surface portion 542 toward light incident surface portion 544a when viewed from the X-axis direction or the Y-axis direction. As shown in Fig. 13(B) , inclined surface 542A is inclined from front surface portion 541 toward light incident surface portion 544a, and totally reflects light L2 emitted from first light emitting element 441A so as to rise toward front surface portion 541.

[0059] As a result, the light source module 14 can easily illuminate the peripheral portion S of the front portion 541, which is the edge of the lens, with only the first light emitting element 441A. In other words, since the first light emitting element 441A and the second light emitting element 441B, which are light sources, are not provided directly below the peripheral portion S when viewed from the Z-axis direction, it has been difficult to illuminate the peripheral portion S. In contrast, according to this embodiment, the first total reflection surface portion 544A and the second total reflection surface portion 5421 can totally reflect the emitted light L2 to illuminate the peripheral portion S. In addition, the appearance (design) of the front portion 541, which is the light emission surface, can be improved (because if there is a part (peripheral portion S) that is not illuminated, it looks bad).

[0060] Furthermore, in the light source module 14, the lens body 540 has a hexagonal shape (as viewed from the Z-axis direction). This makes the distance from the first light-emitting element 441A provided at the center to the edge of the lens (peripheral portion S) shorter than in a quadrangle, so that the peripheral portion S can be illuminated more.

[0061] In addition, in the case of this embodiment, the entire lens (such as the periphery) can be illuminated more than in the conventional light source module. Also, compared to the conventional light source module, the number of light emitting elements is smaller, and the entire lens can be illuminated while increasing the central luminous intensity.

[0062] In the present embodiment, the inside of the hole 543 is an air space, but the present invention is not limited to this, and the hole 543 may be filled with a low refractive index material (for example, fluoride (magnesium fluoride (refractive index: about 1.38), calcium fluoride (refractive index: about 1.40))). This makes it possible to reduce the difference in refractive index with the lens body 540 (increase the critical angle), thereby making it possible to suppress the occurrence of total reflection of the light L1 emitted from the second light emitting element 441B provided at the center.

[0063] Furthermore, in the light source module 14, light (light emitted from the first light emitting element 441A or the second light emitting element 441B) leaks out from the peripheral surface portion 542. This allows the light source module 14 to emit light three-dimensionally, improving the design.

[0064] [Light source module array 14'] Here, the arrangement of the light source module array 14' will be described as above. Fig. 8 is an overall perspective view of the light source module array 14', and Fig. 9 is a partial perspective view of the light source module array 14'. Fig. 10 is a side view of the light source module array 14'. In this embodiment, the light source module array 14' is used as a marker lamp (tail lamp) for a railway vehicle.

[0065] The light source module array 14' is an arrangement of a plurality of light source modules 14, each of which has a first light-emitting element 441A and a second light-emitting element 441B, a lamp part 61 that houses the first light-emitting element 441A and the second light-emitting element 441B, and an optical lens 54 having a front surface 541 which is a light emission surface and a peripheral surface 541 and is attached to the lamp part 61.

[0066] In this embodiment, the plurality of light source modules 14 includes a first light source module 14A, a second light source module 14B, a third light source module 14C, a fourth light source module 14D, a fifth light source module 14E, and a sixth light source module 14F. Here, in this embodiment, the front surface portions 541 of the plurality of light source modules are all hexagonal in shape when viewed from the Z-axis direction, but of course, this is not limited thereto, and it is sufficient that at least one of the front surface portions 541 is hexagonal.

[0067] The first light source module 14A is one light source module in this embodiment, and is provided on a first plane S1 that is parallel to the XY plane parallel to the front surface portion 541. The second light source module 14B has a second light source module 141B and a second light source module 142B in this embodiment. Both second light source modules 14B are parallel to the XY plane, and are provided on a second plane S2 (negative side of the Z axis) that is different from the first plane S1 in the Z axis direction, and are adjacent to the first light source module 14A when viewed from the Z axis direction.

[0068] In this embodiment, the third light source module 14C includes a third 1 light source module 141C, a third 2 light source module 142C, and a third 3 light source module 143C. All three third light source modules 14C are parallel to the XY plane, are provided on a third plane S3 (on the negative side of the Z axis from the second plane S2) that is different from the first plane S1 and the second plane S2 in the Z axis direction, and are adjacent to the second light source module 14B when viewed from the Z axis direction.

[0069] Similarly, the fourth light source module 14D has a fourth 1-light source module 141D, a fourth 2-light source module 142D, and a fourth 3-light source module 143D. All three of the fourth light source modules 14D are parallel to the XY plane, and are provided on a fourth plane S4 (on the negative side of the Z axis from the third plane S3) that is different from the first plane S1, the second plane S2, and the third plane S3 in the Z axis direction, and are adjacent to the third light source module 14C when viewed from the Z axis direction.

[0070] Similarly, the fifth light source module 14E has a fifth first light source module 141E and a fifth second light source module 142E. Both fifth light source modules 14E are parallel to the XY plane, and are provided on a fifth plane S5 (on the negative side of the Z axis from the fourth plane S4) that is different from the first plane S1 to the fourth plane S4 in the Z axis direction, and are adjacent to the fourth light source module 14D when viewed from the Z axis direction.

[0071] The sixth light source module 14F includes one light source module in this embodiment. The sixth light source module 14F is parallel to the XY plane, is disposed on a sixth plane S6 (on the negative side of the Z axis from the fifth plane S5) that is different from the first plane S1 to the fifth plane S5 in the Z axis direction, and is adjacent to the fifth light source module 14E when viewed from the Z axis direction.

[0072] The light source module array 14' further includes a third base plate 24 which is a base member. The third base plate 24 supports the above-mentioned multiple light source modules 14. The third base plate 24 has a first support surface 241 which forms a first plane S1 and supports the first light source module 14A, a second support surface 242 which forms a second plane S2 and supports the second light source module 14B, a third support surface 243 which forms a third plane S3 and supports the third light source module 14C, a fourth support surface 244 which forms a fourth plane S4 and supports the fourth light source module 14D, a fifth support surface 245 which forms a fifth plane S5 and supports the fifth light source module 14E, and a sixth support surface 246 which forms a sixth plane S6 and supports the sixth light source module 14F, and each of these support surfaces 241 to 246 is provided at a position parallel to the XY plane and shifted by a predetermined distance in the Z-axis direction. That is, the third base plate 24 has a stepped shape in this embodiment.

[0073] That is, in this embodiment, the light source module 14 is attached to the base member 20 via the third base plate 24, and the base member 20 is attached to the vehicle body (not shown). This not only improves workability compared to the case where the light source module 14 is directly attached to the vehicle body, but also improves the freedom of design.

[0074] Here, the arrangement of the light source module array 14' will be described with reference to Fig. 9. As shown in Fig. 9, a second light source module 14B and a third light source module 14C will be used for the description.

[0075] In the second light source module 14B, the second light source module 141B and the second light source module 142B face each other at their sides when viewed from the Z-axis direction. More specifically, the second light source module 141B has six sides, and one of the sides, a first side 1411B, faces one of the six sides of the second light source module 142B, a first side 1421B.

[0076] The second light source modules 14B are aligned along a direction perpendicular to one of the opposing sides, that is, along a direction L perpendicular to a first side 1411B of the second light source module 141B and a first side 1421B of the second light source module 142B and parallel to the XY plane.

[0077] In addition, in the third light source module 14C, the third-first light source module 141C and the third-second light source module 142C face each other at their sides when viewed from the Z-axis direction. In addition, the third-second light source module 142C and the third-third light source module 143C face each other at their sides when viewed from the Z-axis direction. More specifically, the third-first light source module 141C has six sides, and a first side 1411C, which is one of the six sides of the third-second light source module 142C, faces a first side 1421C, which is one of the six sides of the third-second light source module 142C. In addition, a fourth side 1424C, which faces the first side 1421C among the six sides of the third-second light source module 142C, faces a first side 1431C, which is one of the six sides of the third-third light source module 142C.

[0078] The third light source modules 14C are aligned along a direction perpendicular to one of the opposing sides. That is, the third light source modules 14C are aligned along a direction L perpendicular to the first side 1411C of the third light source module 141C and the first side 1421C of the third light source module 142C, the fourth side 1424C of the third light source module 142C and the first side 1431C of the third light source module 143C, and parallel to the XY plane.

[0079] The second light source module 141B further has a second side 1412B and a third side 1413B, which are two adjacent sides of the six sides, the third light source module 141C further has a second side 1412C, and the third light source module 142C further has a second side 1422C. When viewed from the Z-axis direction, the second side 1412B of the second light source module 141B and the second side 1422C of the third light source module 142C face each other, and the third side 1413B of the second light source module 141B and the second side 1412C of the third light source module 141C face each other.

[0080] The second light source module 142B further has a second side 1422B and a third side 1423B, which are two adjacent sides among the six sides, the third light source module 142C further has a third side 1423C, and the third light source module 143C further has a second side 1432C. When viewed from the Z-axis direction, the second side 1422B of the second light source module 142B faces the third side 1423C of the third light source module 142C, and the third side 1423B of the second light source module 143B faces the second side 1432C of the third light source module 143C.

[0081] In this embodiment, the arrangement relationship between the second light source module 14B and the third light source module 14C has been described, but of course, this is not limited to this, and the first light source module 14A and the second light source module 14B, the third light source module 14C and the fourth light source module 14D, etc. are also arranged as described above.

[0082] The light source module array 14' is arranged in a staggered or honeycomb pattern when viewed from the Z-axis direction. Here, the staggered pattern means that the light source modules are arranged alternately from one end side to the other end side in the arrangement direction of the multiple light source modules 14. In other words, for example, the second light source module 14B and the third light source module 14C are arranged in a staggered pattern. The honeycomb pattern is a structure in which regular hexagons are arranged, and in this embodiment, the light source module array 14' is also arranged in a honeycomb pattern.

[0083] 10, when the light source module array 14' is viewed from a direction perpendicular to the Z-axis direction, at least a part of the peripheral surface 542 of each light source module 14 provided at a different height position in the Z-axis direction is visible (exposed). In this embodiment, for example, the peripheral surface of the first light source module 141A, the peripheral surface of the second light source module 142B, and the peripheral surface of the third light source module 143C are each provided so as to be visible when viewed from the Y-axis direction. Of course, the same is true for the peripheral surface of the second light source module 141B, the peripheral surface of the third light source module 142C, and the peripheral surface of the fourth light source module 143D.

[0084] As described above, in this embodiment, the front portion of the light source module 14 is hexagonal, so the arrangement can have a more design-oriented feel than a square shape. That is, for example, in the case of this embodiment, the arrangement can be made to follow a curved surface, and the design can be more oriented (that is, the arrangement can be made smoother than the conventional square shape, and the resolution appears to be improved).

[0085] In addition, since the peripheral surface portion 542 is a light-emitting surface, it can be shifted in the Z-axis direction and arranged three-dimensionally as in this embodiment (since the peripheral surface portion is also a light-emitting surface, it appears to emit light three-dimensionally). In addition, since the front portion of the light source module 14 is hexagonal, it is easy to obtain affinity with the first headlight light source module 11 and the second headlight light source module 12, which have circular lens shapes, and it is easy to arrange it as the lighting device 100.

[0086] In addition, in this embodiment, the light source module array 14' is arranged in a staggered or honeycomb configuration, so that the light emitted from each of the light source modules 14 appears to be concentrated. This improves the visibility of the emitted light and also improves the design (a concentrated appearance is more attractive than a sparse appearance).

[0087] Furthermore, the arrangement of the light source module array 14' is not limited to the example of the present embodiment described above. For example, the light source modules 14 of the light source module array 14' are not limited to being all hexagonal, and square-shaped light source modules may also be arranged.

[0088] Furthermore, the arrangement is not limited to a three-dimensional arrangement (arrangement shifted in the Z-axis direction) and may be a planar arrangement in which the light source modules 14 are arranged on the same plane. In the present embodiment, the second light source module 14B to the fifth light source module 14E are linearly arranged along the direction L, but the arrangement is not limited to this and the light source modules may be arranged on the same plane in a V-, X-, or Y-shape when viewed from the Z-axis direction.

[0089] In this embodiment, the light emitting element is red, but of course, the light emitting element may be other colors. In addition, in this embodiment, the light source module array 14' is for a tail light, but the light emitting element may be for a head light, etc. [Explanation of symbols]

[0090] 10…Light source module 11...First headlamp light source module 12...Second headlamp light source module 14…Light source module 20...Base member 21…First base plate 22…Second base plate 24…Third base plate 43'...Light source 54...Optical lens 63...Third light body 100…Lighting equipment 441A, 441B...Light emitting element 442...Circuit board 540…Lens body 541...Front part 542...peripheral part 544…Lens section 545…Ring protrusion 548…Abutment surface 549...Engagement recess 611…Bottom 612...Cylindrical part 613…Opening 615…Engagement protrusion 617…Engagement part 621...First fixed part 622…Second fixed part

Claims

1. A light source module array is an array of a plurality of light source modules, each of which has one or more light emitting elements, a lighting body part that houses the light emitting elements, and an optical lens that has a front surface and a peripheral surface that are light emitting surfaces and is attached to the lighting body part, The plurality of light source modules include a light source module whose front surface is hexagonal when viewed from a first direction perpendicular to the front surface. Light source module array.

2. 2. The light source module array of claim 1, The plurality of light source modules include one or more first light source modules provided on a first plane parallel to the front surface, the front surface of which is hexagonal when viewed from the first direction, and one or more second light source modules provided on a second plane parallel to the first plane and different from the first plane, adjacent to the first light source module when viewed from the first direction, and the front surface of which is hexagonal. Light source module array.

3. 3. The light source module array of claim 2, the plurality of light source modules include three or more of the first light source modules, The plurality of first light source modules are arranged such that at least one side of each of the plurality of first light source modules faces each other when viewed from the first direction. Light source module array.

4. 4. The light source module array of claim 3, The plurality of first light source modules are arranged in an aligned manner along a direction perpendicular to opposing sides of the plurality of first light source modules. Light source module array.

5. 2. The light source module array of claim 1, The plurality of light source modules are arranged in a staggered or honeycomb pattern when viewed from the first direction. Light source module array.

6. 3. The light source module array of claim 2, a base member for supporting the plurality of light source modules; The base member has a stepped shape and includes a first support surface that supports the first light source module and forms the first plane, and a second support surface that supports the second light source module and forms the second plane. Light source module array.

7. 2. The light source module array of claim 1, The light source module array is a marker light for a railway vehicle. Light source module array.

8. 2. The light source module array of claim 1, The optical lens further includes a lens body having a light incident surface portion on which light emitted from the one or more first light-emitting elements is incident, a first total reflection surface portion that totally reflects the light incident from the light incident surface portion toward the peripheral surface portion, and a second total reflection surface portion that is provided on the peripheral surface portion and causes the light totally reflected by the first total reflection surface portion to rise up to the front surface portion. Light source module array.

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