JP6331814B2 - Lighting device - Google Patents

Description

  The present invention relates to an illumination device using a light source unit in which a light source such as an LED and a reflector are combined.

  In recent years, a light source unit in which a light source such as an LED and a reflector of the LED are combined is known. As this type of light source unit, for example, a light source unit in which a support provided with an LED for irradiating light on the reflection surface is attached to the front surface of the reflection surface having a reflection surface (see, for example, Patent Document 1). .

Japanese Patent No. 4457920

In a light source unit that combines a light source and a reflector, light distribution control is performed on the light emitted from the light source using the reflector. There has been a demand to illuminate a wide irradiation area using such a light source unit.
This invention is made | formed in view of the situation mentioned above, and provides the illuminating device which can illuminate the irradiation area of a desired range using the light source unit which combined the light source and the reflector. With the goal.

In order to achieve the above-described object, the illumination device of the present invention is configured such that the light emitting portion of the light emitting element faces the concave reflecting surface of the reflector, and the light from the light emitting portion is collected on the reflecting surface and reflected by the reflecting surface. A plurality of light source units for emitting light from the front are provided, and a plurality of light source units are arranged side by side to form a pair of light source unit arrays, and the pair of light source units in each light source unit array is connected to each light source. Each light emitting element is moved away from the focal position of the reflecting surface in a direction away from the center C of the unit array along the horizontal direction of the light source units , or in a direction approaching the center C along the horizontal direction of the light source units. Each light source unit array is connected with a predetermined angle.

Further, the present invention is characterized in that the light source unit array is formed by arranging the plurality of light source units on a flat substrate.
Further, the present invention is characterized in that the reflection surface includes a plurality of reflection surface portions having different curvatures, and each reflection surface portion is connected by a step portion so that the curvature decreases as the distance from the light emitting element increases. To do.

In addition, the present invention includes a single support provided on the front surface of the plurality of reflectors, the light emitting elements facing each reflective surface of the plurality of reflectors, and the support is made of a heat conductive material. And a conductive member that is formed of a material having conductivity and thermal conductivity and that electrically and thermally connects the light emitting element, and the reflector is a conductive material that extends from the support. It has the groove | channel extended from the front surface of the said reflector to the back surface which lets a body pass.
Further, the present invention is characterized in that a light source unit in which the light emitting element is disposed at a focal position of the reflecting surface is disposed between a pair of light source units in the light source unit array.

  According to the present invention, a plurality of light source units are arranged side by side to form a pair of light source unit arrays, and the pair of light source units in each light source unit array is separated from the center of each light source unit array, or Since each light emitting element is shifted in the direction approaching the center and each light source unit array is connected with a predetermined angle, a wide irradiation area can be illuminated. Thereby, the irradiation area of a desired range can be illuminated at a predetermined irradiation distance by adjusting the shift amount of each light emitting element and the angle between the light source unit arrays.

It is a perspective view which shows the illuminating device of embodiment of this invention from the front side. It is a perspective view which shows an illuminating device from the back side. It is a top view of an illuminating device. It is a disassembled perspective view which shows a light source unit arrangement | sequence. It is a disassembled perspective view which shows a light source unit. It is a figure which shows the board | substrate for circuits, (A) is a reverse view of a support part, (B) is sectional drawing of the support part which attached the light source and the conductor. It is a longitudinal cross-sectional view which shows a light source unit. It is a figure which shows the characteristic of a reflective surface typically. It is a figure which shows typically the radiation characteristic of a light source unit, (A) is sectional drawing which shows the light source unit without optical axis shifting, (B) and (C) is sectional drawing which shows the light source unit with optical axis shifting. is there. It is sectional drawing which shows the structure of a pair of light source unit. It is XX sectional drawing of FIG. It is XI-XI sectional drawing of FIG. It is a figure which shows an irradiation area, (A) shows the irradiation area of a pair of light source unit and light source unit arrangement | sequence, (B) is a figure which shows the irradiation area of a pair of light source unit arrangement | sequence. It is a figure which shows the structure of the light source unit arrangement | sequence of the modification 1 of this invention, (A) is sectional drawing of a light source unit arrangement | sequence, (B) is a figure which shows an irradiation area. It is a perspective view which shows the illuminating device of the modification 2 of this invention from the front side. It is a perspective view which shows an illuminating device from the back side. It is a figure which shows an irradiation area.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing the lighting device 1 of the embodiment from the front side, FIG. 2 is a perspective view showing the lighting device 1 from the back side, and FIG. 3 is a plan view of the lighting device 1. The illumination device 1 is a device for illuminating a predetermined irradiation area at a predetermined irradiation distance. In the following description, front and rear and front and back correspond to the radiation direction of the light source unit, and in this embodiment, the radiation direction is described as the front or the front.

  The lighting device 1 of the present embodiment is a device that is installed, for example, above a road and illuminates a predetermined irradiation area (for example, 8 m × 2 m) at a predetermined irradiation distance (for example, 19 m). As shown in FIG. 1, the lighting device 1 includes a plurality (24 in the present embodiment) of light source units 10. A plurality of (in this embodiment, 12) light source units 10 are arranged on the horizontal and flat substrate 2 to form a light source unit array 50. The lighting device 1 includes a pair of light source unit arrays 50. Although not shown, the substrate 2 is provided with a heat dissipation pad on the front side and a wiring circuit for each light source unit 10 electrically and thermally connected to the heat dissipation pad on the back side. The board | substrate 2 comprises the copper foil on both surfaces of the board | plate materials which consist of insulating materials, such as resin, has the thermal radiation pad and wiring circuit which have heat dissipation, and comprises the thermal radiation part of the illuminating device 1. FIG. A connector 5 for connecting to a control board such as a power supply board is provided on the back surface of the board 2.

  The lighting device 1 includes at least a pair of light source unit arrays 50 supported by the large support body 6. The large support 6 is formed in a V shape in plan view, and will be described later in detail. The light source unit arrays 50 are connected to each other with a predetermined angle. The large support body 6 includes a base 8 and is configured to be erected by the base 8. As shown in FIG. 3, the lighting device 1 may be configured to be housed in a box-shaped housing 200.

As shown in FIG. 4, the light source unit array 50 includes a support 13 that supports the LED 11 that is a light emitting element, and a plurality of reflectors 12. In this embodiment, a single support 13 covers a plurality of reflectors 12 (six in this embodiment). The support 13 is formed of a plate material made of a metal material having a high thermal conductivity such as an aluminum alloy. The support 13 includes a frame-shaped support frame 13 </ b> A that covers the six reflectors 12. The support 13 is provided with support portions 130 at positions corresponding to the respective reflectors 12. Each support portion 130 supports an LED 11 that is a light emitting element in which a light emitting surface 11A (light emitting portion) is opposed to each reflector 12. A circuit pattern 15 to be described later for supplying power to the LED 11 is provided on the back surface of each support portion 130. That is, the support 13 is configured as an LED substrate of the light source unit array 50.
In this embodiment, since several LED11 was attached to the support body 13 of 1 sheet, the temperature of each support part 130 can be kept substantially uniform. As a result, the lifetime of several LED11 provided in the support body 13 can be made substantially uniform. In addition, it is good also considering the group of the several light source unit 10 covered with the one support body 13 as the replacement | exchange unit at the time of the maintenance of the illuminating device 1. FIG. In addition, in this embodiment, although it was set as the structure which covers the some reflector 12 with the one support body 13, although illustration is abbreviate | omitted, even if the support body 13 is arrange | positioned at each reflector 12, it is not shown. Good.

  As illustrated in FIG. 5, the light source unit 10 includes an LED 11 that is an example of a light emitting element supported by a support portion 130, and a reflector 12 that is disposed to face the light emitting surface 11 </ b> A of the LED 11. The LED 11 is a high-power LED with a lens that is configured by storing a large number of LED elements as an example of a light-emitting element in one package or lamp. The light source unit 10 may be configured to use a light emitting element such as an organic EL as a light source in addition to the LED element.

  The support portion 130 is provided with an opening 18 having a circular shape in plan view and a frame-like support frame 130 </ b> A surrounding the opening 18. The support portion 130 includes a substantially disc-shaped attachment portion 13B disposed at the center O of the opening 18, two arm portions 13C extending from the support frame 130A toward the attachment portion 13B, and the outside of the opening 18. And a support fixing portion 13D extending in the radial direction. The support member 130 is integrally formed with a support frame 130A, an attachment portion 13B, an arm portion 13C, and a support fixing portion 13D, for example, by die-molding a plate material forming the support member 13. The The two arm portions 13C are arranged on the same straight line. Support body fixing | fixed part 13D is provided in 130 A of support frames on the extension line | wire of the arm part 13C.

  The LED 11 is fixed to the attachment portion 13 </ b> B on the back surface of the support portion 130. Further, as shown in FIG. 6A, a circuit pattern 15 is provided on the back surface of the support portion 130, and external power is supplied to the LED 11 through the circuit pattern 15. The circuit pattern 15 includes an anode electrode (anode) 15A disposed on one arm portion 13C, a cathode electrode (cathode) 15B disposed on the other arm portion 13C, and a thermal land 15C disposed on the mounting portion 13B. It is equipped with. An insulating layer 16 is provided between the arm portion 13 </ b> C and the circuit pattern 15.

  As shown in FIG. 6B, conductors 17 extending on the back surface of the reflector 12 are respectively provided on the back surfaces of the pair of support body fixing portions 13 </ b> D facing the support portion 130. The conductor 17 is formed into a rod-like body from a metal material having high thermal conductivity such as an aluminum alloy, copper, or brass. The conductor 17 includes a main body portion 17A formed in a substantially cylindrical shape, and a flange portion 17B provided on the end surface of the main body portion 17A and fixed to the back surface of the support fixing portion 13D. The conductor 17 is fixed to the support fixing portion 13D by brazing, soldering, press-fitting, caulking, screwing, or the like. Of the pair of conductors 17, one conductor 17 is connected to the anode electrode 15A, and the other conductor 17 is connected to the cathode electrode 15B. These conductors 17 and 17 constitute a wiring of the LED 11 that supplies power to the LED 11 through the circuit pattern 15.

As shown in FIG. 7, the support 130 is fixed to the upper surface 12 </ b> A of the reflector 12 with the back surface in surface contact with the light emitting surface 11 </ b> A of the LED 11 facing the back surface.
The reflector 12 can be formed by resin molding using an insulating material such as a resin material, and is formed in a box shape having a rectangular shape in plan view as shown in FIG. The reflector 12 is not limited to a configuration formed using an insulating material such as a resin material, and may be formed of a metal material, for example. The reflector 12 is provided with a reflecting surface 14 formed with a concave upper surface 12A. The reflective surface 14 is formed by applying a reflective material to a recess formed in the upper surface 12A of the reflector 12. According to this configuration, the light source unit 10 can be reduced in weight by forming the reflector 12 using a resin or the like, and heat transfer from the support 13 to the reflector 12 can be suppressed. And thermal effects can be suppressed.
The reflecting surface 14 is disposed to face the light emitting surface 11 </ b> A of the LED 11. This concave reflecting surface 14 is formed on a rotating paraboloid that reflects incident light from a light source disposed at the focal point F in parallel light. The reflection surface 14 is formed with a radiation opening 14 </ b> A that emits incident light from a light source in a shape corresponding to the opening 18 of the support portion 130, and is disposed at a corresponding position.

  The reflector 12 includes a groove 21 through which the conductors 17 and 17 are passed through the reflector fixing portion 12B corresponding to the conductors 17 and 17. The groove 21 is formed from the upper surface 12 </ b> A (front surface) to the rear surface (back surface) of the reflector 12, and is open to the side of the reflector 12. The conductor 17 is configured such that the lower end (tip) protrudes behind the reflector 12 through the groove 21. Thereby, the conductor 17 can be wired from the back side of the support 13 to the back side of the light source unit 10 via the groove 21 without protruding in the radiation direction of the light source unit 10. Therefore, the influence on the radiated light of the light source unit 10 by wiring can be prevented. Further, since the conductor 17 is passed through the groove 21 in which the side of the reflector 12 is opened, the heat transferred to the conductor 17 can be dissipated from the side of the conductor 17, and the light source unit 10 The heat dissipation can be further improved.

  A convex portion 22 is provided on the upper surface 12A of the reflector 12 along the edge of the radiation opening 14A of the reflecting surface 14. Two protrusions 22 are provided on a diagonal line shifted by approximately 90 degrees from the position where the groove 21 is provided. A concave portion 23 is formed in the support body 13 at a position corresponding to the convex portion 22 (see FIG. 6), and the convex portion 22 of the reflector 12 is fitted into the concave portion 23 of the support body 13. A plurality of reflectors 12 are positioned relative to each other.

At the lower end of the conductor 17, as shown in FIG. 7, a screw hole 26 with a thread formed therein is formed. The conductor 17 is fixed to the back surface of the support fixing portion 13 </ b> D of the support 13 and penetrates through the groove 21 of the reflector 12.
A conductive hole 25 is formed in the substrate 2 at a position corresponding to the screw hole 26.
In the support 13, the screw S 2 inserted from the rear side into the conduction hole 25 of the substrate 2 is screwed into the screw hole 26 of the conductor 17 with the reflector 12 sandwiched between the support 13 and the substrate 2. In combination, the reflector 12 is fixed to the substrate 2 integrally. The screw S2 is formed from a metal material having high thermal conductivity such as an aluminum alloy.

  According to these structures, since the support body 13 was formed from the metal material which has high thermal conductivity, it can be radiated from the front surface of the support body 13. In addition, a conductor 17 formed of a metal material having high thermal conductivity is provided on the back side of the support 13, the conductor 17 is brought into contact with a heat radiation pad (not shown) of the substrate 2, and the substrate 2 is connected to the back of the support 13. The heat of the LED 11 can be transferred to the heat dissipation pad. In addition, the screw S2 formed of a metal material having high thermal conductivity can be screwed to the conductor 17 and brought into contact with the heat dissipation pad of the substrate 2. The screw 2 can also be used to contact the substrate 2 from the back surface of the support 13. The heat of the LED 11 can be transferred to the heat dissipation pad. Thereby, since the heat generation of the LED 11 can be radiated from both the front surface and the rear surface of the support 13, even when the output of the LED 11 is large, the heat of the LED 11 can be radiated efficiently. In addition, although illustration is abbreviate | omitted, since the thermal radiation pad of the board | substrate 2 is thermally connected to the wiring circuit of the back surface of the board | substrate 2, the heat | fever of a thermal radiation pad can be radiated from a wiring circuit.

  As shown in FIG. 7, the reflecting surface 14 includes reflecting surface portions 14X and 14Y. Each of the reflecting surface portions 14X and 14Y is a rotating paraboloid that reflects light from a point light source arranged at the focal point F as light substantially parallel to the central axis N. The reflecting surface portion 14X and the reflecting surface portion 14Y are parabolic surfaces having different curvatures, and are configured such that the curvature decreases as the distance from the LED 11 to the central axis N of the reflecting surface increases. That is, in this embodiment, the curvature x2 of the reflection surface portion 14Y that is far from the LED 11 on the central axis N of the reflection surface is smaller than the curvature x1 of the reflection surface portion 14X (see FIG. 8). The reflective surface portion 14X and the reflective surface portion 14Y are connected by a step portion 14Z. The height of the stepped portion 14Z can be appropriately set depending on the reflection efficiency of the reflecting surface 14 and the processing conditions. The light from the LED 11 incident on the stepped portion 14Z is repeatedly reflected within the reflecting surface 14 and is emitted from the radiation opening 14A.

  FIG. 8 is a diagram schematically showing the characteristics of the reflecting surface 14. As shown in FIG. 8, the light emitting surface 11A of the LED 11 has an area. The light L from the LED 11 radiated from the focal point F is reflected by the reflecting surface 14 and becomes parallel light substantially parallel to the central axis N of the reflecting surface 14. However, the light L ′ from the LED 11 emitted from the periphery of the focal point F does not become parallel light substantially parallel to the central axis N of the reflecting surface 14 when reflected by the reflecting surface 14. Thereby, the light source image by the light from LED11 projected on the irradiation surface of predetermined distance from the illuminating device 1 is projected on an irradiation surface with predetermined magnification. In particular, the light L from the LED 11 reflected at the back of the reflecting surface 14 (near the apex of the paraboloid) is projected onto the irradiation surface at a large magnification. In the present embodiment, by providing the reflecting surface 14 with reflecting surface portions 14X and 14Y, the distance between the LED 11 and the back of the reflecting surface 14 (near the apex of the paraboloid) can be taken. It is possible to reduce the light source image of the light reflected at the back of the. As described above, even when the light emitting surface 11A has an area, the reflecting surface 14 includes the reflecting surface portions 14X and 14Y, so that the LED 11 can be spaced from the back of the reflecting surface 14. The luminous flux from the LED 11 can be stored in a predetermined range. Thereby, the light emitted from the LED 11 arranged at the focal point F is reflected as the light L substantially parallel to the central axis N of the reflecting surface 14. Moreover, although the reflective surface 14 is composed of a plurality of reflective surface portions 14X and 14Y, the height (depth) of the reflective surface 14 is larger than when the reflective surface 14 is composed of a single reflective surface portion. The radiation aperture can be reduced. Therefore, in the illuminating device 1 in which the plurality of light source units 10 are arranged side by side, the units can be densely arranged, and the output can be increased without increasing the size of the device.

  As shown in FIG. 9, the LED 11 is arranged such that the optical axis K is parallel to the central axis N of the reflecting surface 14. When the LED 11 is arranged at the focal point F, as shown in FIG. 9A, the light emitted from the LED 11 is reflected as the light L substantially parallel to the central axis N of the reflector 12, and the support 13 Is radiated forward from the opening 18 between the arm portions 13C. In the light source unit 10, the LED 11 may be arranged at a position shifted in a plane perpendicular to the central axis N from the focal point F. The light source unit 10 is configured so that not only light emitted at the focal point F but also light emitted at a position deviated from the focal point F is incident on the reflecting surface 14, and the LED 11 is within the range of the light emitting surface 11 </ b> A. It can be arranged at a position shifted from the focal point F so that the focal point F is located inside.

  When the LED 11 is arranged with the optical axis K of the LED 11 shifted from the central axis N, the light L emitted from the LED 11 is reflected on the central axis of the reflecting surface 14 as shown in FIGS. 9 (A) and 9 (B). The light does not become parallel to N, and is emitted from the opening 18 in a diagonally forward direction with respect to the central axis N. The angle of the light L emitted from the opening 18 with respect to the central axis N of the reflecting surface 14 changes according to the shift amount between the central axis N and the optical axis K of the LED. As the reflection characteristic of the reflection surface 14, the angle of the light L with respect to the central axis N increases as the shift amount of the optical axis K of the LED 11 from the central axis N increases.

  FIG. 10 shows the configuration of the pair of light source units 10, and FIG. 11 shows the configuration of the light source unit array 50. Although the light source unit array 50 is configured by arranging 12 light source units 10 in the present embodiment, it is sufficient that at least a pair of light source units 10 arranged side by side is provided. The pair of light source units 10 are arranged such that the optical axis K of the LED 11 is shifted from the center axis N of the reflecting surface 14 in a direction away from the center C of the light source unit array 50. The pair of light source units 10 may be arranged such that the optical axis K of the LED 11 is shifted in a direction approaching the center C of the light source unit array 50 with respect to the central axis N of the reflecting surface 14. Thus, the light source unit 10 in which the optical axis K of the LED 11 is shifted in the direction away from the center C of the light source unit array 50 or the direction approaching the center C with respect to the central axis N of the reflecting surface 14 is paired. By arranging, the irradiation area can be expanded and the wide range can be irradiated by crossing the light L emitted from each LED11.

  As shown in FIG. 11, the light source unit array 50 includes a pair of light source units 10 in which the optical axis K of the LED 11 is shifted in a direction away from the center C of the light source unit array 50 with respect to the central axis N of the reflecting surface 14. A pair of light source units 10 in which the optical axis K of the LED 11 is shifted in the direction approaching the center C of the light source unit array 50 with respect to the central axis N of the reflecting surface 14 may be arranged side by side. . By increasing the number of light source units 10 arranged in the light source unit array 50, the irradiation intensity can be increased without changing the irradiation range.

FIG. 12 is a diagram illustrating a connection configuration of a pair of light source unit arrays 50. As shown in FIG. 12, each light source unit array 50 is connected with a predetermined angle α. The angle α is appropriately set according to the irradiation distance and the irradiation range. In the present embodiment, the large support 6 is formed in advance in a substantially V shape in plan view having a predetermined angle α. However, the present invention is not limited to this, and the lighting device 1 adjusts the angle α to a desired angle. It is good also as a structure which has a possible mechanism.
FIG. 13 is a diagram illustrating an irradiation area of the light source unit array 50. FIG. 13A shows an irradiation area of the pair of light source units 10 shown in FIG. 10 and the light source unit array 50 shown in FIG. As shown in FIG. 13A, in a pair of light source units 10 and a light source unit array 50 in which two pairs of light source units 10 are arrayed, an irradiation area in substantially the same range is illuminated (this embodiment). Then, an irradiation area of approximately 4 m × 2 m). FIG. 13B shows an irradiation area of the lighting device 1 in which a pair of light source unit arrays 50 are connected with a predetermined angle. As shown in FIG. 13B, a wide range of irradiation areas can be obtained by connecting the light source unit arrays 50 with a predetermined angle (in this embodiment, an irradiation area of approximately 8 m × 2 m). ). In this way, by connecting the light source unit arrays 50 with a predetermined angle, a wide irradiation area can be obtained without increasing the size of the apparatus.

  As described above, according to the embodiment to which the present invention is applied, the light emitting surface 11A of the LED 11 is opposed to the concave reflecting surface 14 of the reflector 12, and the light from the light emitting surface 11A is collected on the reflecting surface 14, A plurality of light source units 10 for emitting light reflected by the reflecting surface 14 from the front surface are provided, and a plurality of light source units 10 are arranged side by side to form a pair of light source unit arrays 50. The LED 11 is formed in a direction away from the center of each light source unit array 50 or in a direction approaching the center by shifting each LED 11 from the focal point F position of the reflecting surface 14, and each light source unit array 50 is formed. They are connected at a predetermined angle α. According to this configuration, the LED 11 of each light source unit 10 is arranged such that the optical axis K is shifted from the central axis N of the reflecting surface 14, so that the irradiation area of light from each LED 11 can be expanded. In addition, a pair of light source units 10 in which the optical axis K of the LED 11 is shifted from the central axis N of the reflecting surface 14 are arranged side by side to form a pair of light source unit arrays 50, and each light source unit array 50 is arranged at a predetermined angle α. Therefore, it is possible to illuminate a wide irradiation area without increasing the size of the illumination device 1. Therefore, by adjusting the shift amount of the optical axis K of each LED 11 and the angle α between the light source unit arrays 50, it is possible to illuminate an irradiation area in a desired range at a predetermined irradiation distance.

  Further, according to the embodiment to which the present invention is applied, the light source unit array 50 is formed by arranging a plurality of light source units 10 on the flat substrate 2. According to this configuration, the irradiation intensity of the illumination device 1 can be easily changed by changing the number of the light source units 10 attached to the substrate 2.

  In addition, according to the embodiment to which the present invention is applied, the reflection surface 14 includes a plurality of reflection surface portions 14X and 14Y having different curvatures, and the curvature decreases as the reflection surface portions 14X and 14Y move away from the LED 11. I was connected to. According to this configuration, although the height (depth) of the reflecting surface 14 is increased as compared with the case where the reflecting surface 14 is configured by a single reflecting surface portion, the radiation aperture can be reduced. Therefore, in the illuminating device 1 in which the plurality of light source units 10 are arranged side by side, the units can be densely arranged, and the output can be increased without increasing the size of the device. In addition, by providing the reflecting surface portions 14X and 14Y on the reflecting surface 14, even if the light emitting surface 11A has an area, the distance between the LED 11 and the back of the reflecting surface 14 can be taken. The luminous flux from the LED 11 can be stored in a predetermined range. Therefore, the light source image of the LED 11 does not become too large even in the far irradiation area of the illumination device 1, and the light flux from the LED 11 can be stored in the desired irradiation area, and the irradiation intensity can be controlled in the irradiation area. Therefore, as in the present embodiment, a wide band-shaped irradiation area of 8 m × 2 m, which is 19 m away from the lighting device 1, can be formed, and light can be controlled appropriately.

  In addition, according to the embodiment to which the present invention is applied, a single support 13 is provided on the front surface of the plurality of reflectors 12, and the LEDs 11 are arranged to face each reflection surface 14 of the plurality of reflectors 12. 13 is formed of a thermally conductive material, and a conductive body 17 is formed on the support body 13 with a material having electrical conductivity and thermal conductivity, and performs electrical and thermal connection of the LED 11. A groove 21 extending from the front surface to the back surface of the reflector 12 through which the conductor 17 extending from the support 13 passes is provided. According to this configuration, the heat generated by the LED 11 can be radiated from both the front surface and the rear surface of the support 13. Further, by attaching a plurality of LEDs 11 to one support body 13, the temperature of each support portion 130 provided at a position corresponding to each reflector 12 can be kept substantially uniform. As a result, the lifetime of several LED11 provided in the support body 13 can be made substantially uniform.

<Modification 1>
In the embodiment described above, a pair of light source units 10 formed by shifting the optical axis K of the LED 11 from the central axis N of the reflecting surface 14 are arranged side by side to constitute the light source unit array 50. FIG. 14 is a diagram illustrating a light source unit array 50 according to the first modification. The light source unit array 50 may include three light source units 10 as shown in FIG. A light source unit array 50 including three light source units 10 includes a pair of light source units 10 in which the optical axis K of the LED 11 is shifted from the central axis N of the reflecting surface 14 in a direction away from the center C of the light source unit array 50. . Further, in the light source unit array 50 including the three light source units 10, the light source unit 10 in which the optical axis K of the LED 11 is aligned with the central axis N of the reflecting surface 14 includes a pair of light axes K shifted from each other. Arranged between the light source units 10. The light source unit array 50 including the three light source units 10 includes a pair of light source units 10 in which the optical axis K of the LED 11 is shifted from the center axis N of the reflecting surface 14 in a direction approaching the center C of the light source unit array 50. May be provided. FIG. 14B is a diagram illustrating an irradiation area of the light source unit array 50 including the three light source units 10. When the light source unit array 50 is configured by combining the light source unit 10 with the optical axis K shifted and the light source unit 10 with the optical axis K aligned with the central axis N, only the light source unit 10 with the optical axis K shifted is used. It is desirable to adjust in the direction in which the shift amount of the optical axis K is larger than when the light source unit array 50 is configured. As a result, the light source unit array 50 is configured by arranging the light source unit 10 with the optical axis K aligned with the central axis N between the pair of light source units 10 with the optical axis K shifted, and the irradiation intensity within the irradiation area. And a wide irradiation area can be obtained (in this embodiment, an irradiation area of approximately 8 m × 2 m).

  As described above, according to the embodiment to which the present invention is applied, the LED 11 is disposed between the pair of light source units 10 in which the optical axis K of the LED 11 is shifted from the central axis N of the reflecting surface 14 in the light source unit array 50. The light source unit 10 is arranged at the position of the focal point F of the reflecting surface 14 and the optical axis K of the LED 11 is aligned with the central axis N of the reflecting surface 14. According to this configuration, the three light source units 10 can be arranged side by side to expand the range of the irradiation area in the horizontal direction, and a wide irradiation area can be obtained without increasing the size of the apparatus.

<Modification 2>
In the illuminating device 1 according to the above-described embodiment, a pair of light source unit arrays 50 are arranged side by side, and the light source unit arrays 50 are connected with a predetermined angle to obtain a wide irradiation area. FIG. 15 is a perspective view illustrating the lighting device 100 according to the second modification from the front side, and FIG. 16 is a perspective view illustrating the lighting device 100 according to the second modification from the back side. In the illumination device 100 of this modified example, an illumination device capable of obtaining a wider irradiation area by using two sets of light source modules 150 including a pair of light source unit arrays 50 connected with a predetermined angle α. provide. In the description of this modification, the same components as those in the above-described embodiment are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

  As shown in FIGS. 15 and 16, the illumination device 100 includes two sets of light source modules 150 including a pair of light source unit arrays 50, and the light source modules 150 are connected to each other with a predetermined angle β. The illumination device 100 includes a large support 106 that supports the four light source unit arrays 50. The large support 106 is formed in a V-shape in a plan view and a V-shape in a side view, and connects the light source unit arrays 50 arranged side by side with a predetermined angle α, and is arranged vertically. Each light source module 150 is connected with a predetermined angle β.

  FIG. 17 is a diagram illustrating an irradiation area of the illumination device 100. As shown in FIG. 17, the lighting device 100 can illuminate the road width direction W in a wide range, and can also illuminate the road direction G in a wide range (8 m × 4 m in this embodiment). The illumination device 100 includes a pair of light sources in which each light source unit array 50 is formed by shifting the LEDs 11 in the direction away from the lateral center C of the light source unit array 50 in the lateral direction or the approaching direction. Although provided with the unit 10, it is not limited to this. For example, the illuminating device may include a pair of light source units 10 formed by shifting the LEDs 11 in the direction away from or approaching the optical axis K from the longitudinal center of the light source unit array 50 in the longitudinal direction. By appropriately setting the direction in which the optical axis K of each light source unit 10 is shifted, the angle at which each light source unit array 50 is connected, and / or the angle at which each light source module 150 is connected, desired illumination can be performed with one illumination device. A range can be obtained.

  The above-described embodiment is merely an example of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1,100 Illumination device 2 Board | substrate 10 Light source unit 11 LED (light emitting element)
11A Light emitting surface (light emitting part)
DESCRIPTION OF SYMBOLS 12 Reflector 13 Support 14X Reflective surface part 14Y Reflective surface part 17 Conductor 21 Groove 50 Light source unit arrangement 130 Support part 150 Light source module C Center F Focus K Optical axis L Light N Center axis

Claims (5)

The light emitting unit of the light emitting element is opposed to the concave reflecting surface of the reflector, the light from the light emitting unit is collected on the reflecting surface, and a plurality of light source units that emit light reflected from the reflecting surface from the front are provided.
A plurality of light source units are arranged side by side to form a pair of light source unit arrays, and the pair of light source units in each light source unit array is arranged from the center C of each light source unit array along the horizontal direction of the light source units. away Te, or in a direction approaching along the side-by-side direction of the light source unit to the center C, formed by shifting the respective light emitting elements from the focal point of the reflecting surface,
Each light source unit array is connected with a predetermined angle,
A lighting device characterized by that.   The lighting device according to claim 1, wherein the light source unit array is formed by arranging a plurality of light source units on a flat substrate. The reflective surface includes a plurality of reflective surface portions having different curvatures from each other,
3. The lighting device according to claim 1, wherein each of the reflection surface portions is connected by a step portion so that the curvature decreases as the distance from the light emitting element increases. Provided on the front surface of the plurality of reflectors, comprising one support body that disposes the light emitting element on each reflecting surface of the plurality of reflectors,
The support is formed of a heat conductive material, and the support is formed of a material having conductivity and heat conductivity, and a conductor for electrically and thermally connecting the light emitting element is provided.
The lighting device according to any one of claims 1 to 3, wherein the reflector has a groove extending from the front surface to the back surface of the reflector through which the conductor extending from the support is passed.   5. The illumination device according to claim 1, wherein a light source unit in which the light emitting element is disposed at a focal position of the reflecting surface is disposed between a pair of light source units in the light source unit array. .