JP6238163B2 - Lighting device and lighting fixture - Google Patents

Description

  The present invention relates to a lighting device including a plurality of LEDs (light emitting diodes) and a lighting fixture using the same.

  Conventionally, as an illuminating device, the illuminating device 101 of the structure shown in FIG. 16 is proposed (patent document 1).

  The lighting device 101 includes a light source unit 102 having a light source 120, an optical lens 103 disposed on the light source unit 102, and a holding plate 104 that holds the light source unit 102 and the optical lens 103. The lighting device 101 can be used as a tunnel lighting device.

  In addition to the light source 120, the light source unit 102 includes a base member 121 on which the light source 120 is mounted and an attachment frame 122 to which the base member 121 is attached. In the light source 120, a plurality of LED chips (not shown) are arranged in a matrix, and the light emission surfaces of these LED chips are covered with a wavelength conversion member containing a phosphor. For example, a GaN blue LED chip that emits blue light is used as the LED chip. As the wavelength conversion member, for example, a translucent resin such as a silicone resin containing a YAG yellow phosphor is used.

  The optical lens 103 has an incident surface 131 on which light from the light source 120 is incident, and an output surface 132 that emits light incident on the incident surface 131. The exit surface 132 can diffuse and exit the light incident on the entrance surface 131.

  As shown in FIG. 17, the optical lens 103 is composed of a plurality of curves C1 and C2 having different curvature radii in the cross-sectional shape of the exit surface 132 in one plane including the normal line NL passing through the center of the entrance surface 131. It is formed so as to be asymmetric with respect to the normal line NL.

JP 2012-212047 A

  In the illumination device 101, since the light source 120 includes an LED chip and a wavelength conversion member, color unevenness may occur on the irradiated surface to which the light from the illumination device 101 is irradiated.

  This invention is made | formed in view of the said reason, The objective is to provide the illuminating device and lighting fixture which can suppress the color nonuniformity in a to-be-irradiated surface.

The illumination device of the present invention includes a plurality of LEDs and a lens array having a plurality of lenses. The lens array is disposed so that the plurality of lenses cover each of the plurality of LEDs. The plurality of lenses include a first lens surface on which light from each of the plurality of LEDs is incident, and a second lens surface on which light from each of the plurality of LEDs is emitted, and each of the plurality of LEDs from each of the plurality of LEDs. The light is diffused and emitted. The plurality of lenses have an asymmetric shape with respect to the optical axis of each of the plurality of lenses. A group of lenses arranged side by side in the first direction among the plurality of lenses have different shapes so that their optical axes intersect each other. In the lens array, the plurality of lenses are arranged in a two-dimensional array, and a group of lenses arranged in a second direction orthogonal to the first direction among the plurality of lenses has the same shape. Is formed.

  In the illumination device, it is preferable that the plurality of lenses have the first lens surface having a concave curved surface shape and the second lens surface having a convex curved surface shape.

  This illumination device preferably includes a mounting substrate on which the plurality of LEDs are mounted.

  In this lighting device, it is preferable to include a plurality of mounting boards on which the respective LEDs are mounted.

  The lighting fixture of this invention is equipped with the said illuminating device as an illumination light source, It is characterized by the above-mentioned.

  In the illumination device of the present invention, the plurality of lenses have an asymmetric shape with respect to the optical axis of each of the plurality of lenses, and a group of lenses arranged side by side in a first direction among the plurality of lenses. The shapes are different from each other so that their optical axes intersect each other. Thereby, in the illuminating device of this invention, it becomes possible to suppress the color nonuniformity in a to-be-irradiated surface.

  In the lighting fixture of this invention, since the said illuminating device is provided as an illumination light source, it becomes possible to suppress the color nonuniformity in a to-be-irradiated surface.

FIG. 1 is a partially cutaway schematic cross-sectional view of the illumination device of the embodiment. FIG. 2 is a schematic front view, partly broken, of the lighting device according to the embodiment. FIG. 3 is a schematic front view of a main part of the illumination device of the embodiment. FIG. 4 is a schematic front view of a lens array in the illumination device of the embodiment. FIG. 5 is a schematic right side view of the lens array in the illumination device of the embodiment. FIG. 6 is a schematic rear view of the lens array in the illumination device of the embodiment. FIG. 7 is a schematic perspective view of a lens array in the illumination device of the embodiment. FIG. 8 is a schematic perspective view of the lens in the middle of the group of lenses arranged side by side in the first direction in the illumination device of the embodiment, as viewed from the first lens surface side. FIG. 9 is a schematic perspective view of the middle lens in the group of lenses arranged side by side in the first direction in the illumination device of the embodiment, as viewed from the second lens surface side. FIG. 10 is a schematic cross-sectional view along the second direction regarding the middle lens in the group of lenses arranged side by side in the first direction in the illumination device of the embodiment. FIG. 11 is a schematic cross-sectional view along the first direction regarding the middle lens in the group of lenses arranged side by side in the first direction in the illumination device of the embodiment. FIG. 12A shows an illuminated surface irradiated with light from the illumination device of the comparative example. FIG. 12B shows an irradiated surface irradiated with light from the illumination device of the embodiment. FIG. 13 is an explanatory diagram of a principle that uneven color is suppressed by the illumination device of the embodiment. Fig.14 (a) is a schematic front view of the lighting fixture provided with the illuminating device of embodiment. FIG.14 (b) is a schematic bottom view of the lighting fixture provided with the illuminating device of embodiment. FIG.14 (c) is a schematic left view of the lighting fixture provided with the illuminating device of embodiment. FIG. 15 is a circuit block diagram of the lighting fixture in the embodiment. FIG. 16 is a side sectional view of a conventional illumination device. FIG. 17 is a side view of an optical lens in a conventional illumination device.

  Below, the illuminating device 1 of this embodiment is demonstrated based on FIGS.

  The illumination device 1 includes a plurality of LEDs 2 and a lens array 4 having a plurality of lenses 3. The lens array 4 is disposed so that the plurality of lenses 3 cover each of the plurality of LEDs 2. The plurality of lenses 3 includes a first lens surface 31 on which light from each of the plurality of LEDs 2 is incident and a second lens surface 32 on which light from each of the plurality of LEDs 2 is emitted, and light from each of the plurality of LEDs 2. Is diffused and emitted. The plurality of lenses 3 have an asymmetric shape with respect to the optical axis L1 of each of the plurality of lenses 3. A group of lenses 3 arranged in the first direction among the plurality of lenses 3 have different shapes so that their optical axes L1 intersect each other. Therefore, the illumination device 1 can suppress color unevenness on the irradiated surface. The illumination device 1 can control the light distribution by the lens array 4 and can suppress uneven color on the irradiated surface. Therefore, the illumination device 1 can reduce variations in light distribution characteristics and variations in color unevenness on the irradiated surface as compared with the case where each of the plurality of lenses 3 is an individual component.

  In the plurality of lenses 3, the first lens surface 31 on which light from each of the plurality of LEDs 2 is incident has a concave curved surface shape, and the second lens surface 32 on which light from each of the plurality of LEDs 2 emits has a convex curved surface shape. Thereby, the illuminating device 1 can efficiently cause the light from each of the plurality of LEDs 2 to enter each of the plurality of lenses 3, and the efficiency of the light source configured by the illuminating device 1 can be improved. . The efficiency of the light source is a value obtained by dividing the total luminous flux of the light source by the energy consumption per unit time.

  In the illuminating device 1, the lens array 4 includes a plurality of lenses 3 arranged in a two-dimensional array, and the lenses 3 arranged side by side in a second direction orthogonal to the first direction among the plurality of lenses 3. The group is preferably formed in the same shape. Thereby, the illuminating device 1 can expand the surface to be irradiated in a direction parallel to the second direction, and can suppress color unevenness on the surface to be irradiated.

  Each component of the illuminating device 1 is demonstrated in detail below.

  The lighting device 1 can be used, for example, as an illumination light source of a lighting fixture (hereinafter referred to as “tunnel lighting fixture”) that is attached to a wall surface in a tunnel and used for basic lighting. According to JIS Z9116-1990, basic illumination is defined as “illumination that ensures substantially uniform brightness over the entire length of the tunnel in order to ensure the visibility of the driver of the car in the tunnel during the day and night”.

  The LED 2 is configured by a white LED including an LED chip 21 and a wavelength conversion unit 22.

  The LED chip 21 having a chip size of 0.3 mm □ (0.3 mm × 0.3 mm), 0.45 mm □ (0.45 mm × 0.45 mm), 1 mm □ (1 mm × 1 mm), or the like is used. Can do. Further, the planar shape of the LED chip 21 is not limited to a square shape, and may be, for example, a rectangular shape. When the planar shape is a rectangular shape, for example, a LED chip 21 having a chip size of 0.5 mm × 0.24 mm can be used. The LED 2 may include a package 23 that houses the LED chip 21. In the LED 2, one LED chip 21 is accommodated in one package 23, but a plurality of LED chips 21 may be accommodated in one package 23.

  The LED chip 21 can be configured by, for example, a blue LED chip that emits blue light. As the blue LED chip, for example, a gallium nitride blue LED chip can be adopted. The LED chip 21 is not limited to a blue LED chip, and may be, for example, a purple LED chip that emits purple light, an ultraviolet LED chip that emits ultraviolet light, or the like.

  LED2 has the shape of the wavelength conversion part 22 as a layered shape. The shape of the wavelength conversion unit 22 is not limited to a layer shape, and for example, a hemispherical shape, a semi-elliptical spherical shape, a dome shape, a rectangular parallelepiped shape, a flat plate shape, or the like can be adopted.

  The wavelength conversion unit 22 is preferably formed of a mixture of a translucent material that transmits visible light and a wavelength conversion material, and covers the LED chip 21.

  As the translucent material, a silicone resin is used. However, the present invention is not limited to this. For example, an epoxy resin, an acrylic resin, glass, an organic / inorganic hybrid material, or the like can be used. In the LED 2, the wavelength conversion unit 22 can also serve as a sealing unit that seals the LED chip 21.

The wavelength conversion material preferably contains a yellow phosphor. As the yellow phosphor, for example, a Ce ³⁺ activated YAG (Yttrium Aluminum Garnet) phosphor, Eu ²⁺ activated oxynitride phosphor, or the like can be employed. Examples of the Ce ³⁺ activated YAG phosphor include Y ₃ Al ₅ O ₁₂ : Ce ³⁺ . Examples of Eu ²⁺ activated oxynitride phosphors include SrSi ₂ O ₂ N ₂ : Eu ²⁺ .

The wavelength conversion material may contain, for example, a red phosphor in addition to the yellow phosphor. In short, the wavelength conversion material may include a yellow phosphor and a red phosphor. As the red phosphor, for example, Eu ²⁺ activated nitride phosphor can be employed. Examples of the Eu ²⁺ activated nitride phosphor include (Sr, Ca) AlSiN ₃ : Eu ²⁺ and CaAlSiN ₃ : Eu ²⁺ .

  When the LED chip 21 is an ultraviolet LED chip or a purple LED chip, the LED 2 may be configured such that the wavelength conversion material includes, for example, a blue phosphor, a green phosphor, and a red phosphor.

  The LED 2 is a color mixture of light emitted from the LED chip 21 and emitted from the wavelength conversion unit 22 without being wavelength-converted by the wavelength conversion unit 22, and light emitted from the wavelength conversion unit 22 after being wavelength-converted by the wavelength conversion material. As shown in FIG.

  The LED 2 includes a first electrode and a second electrode. In the LED 2, one of the first electrode and the second electrode is an anode electrode, and the other is a cathode electrode. The LED 2 in FIG. 1 is a surface-mounted white LED, and a first electrode and a second electrode are provided on the surface of the package 23 opposite to the mounting surface of the LED chip 21.

  The illumination device 1 preferably includes a mounting substrate 5 on which a plurality of LEDs 2 are mounted. Thereby, the illuminating device 1 can improve the relative positional accuracy of each LED 2 and each lens 3.

  The mounting substrate 5 is a substrate on which a plurality of LEDs 2 are mounted. “Mounting” is a concept including arranging and mechanically connecting the LEDs 2 and electrically connecting them.

  The mounting substrate 5 has an elongated rectangular plate shape, and a plurality of LEDs 2 are arranged in a two-dimensional array of i rows and j columns (i = 3, j = 14 in the example of FIG. 3). The plurality of LEDs 2 are arranged in a two-dimensional array of i rows and j columns with the direction parallel to the longitudinal direction of the mounting substrate 5 as the row direction and the direction parallel to the short direction of the mounting substrate 5 as the column direction. In the example of FIG. 3, the number of LEDs 2 mounted on the mounting substrate 5 is 42. The number of LEDs 2 mounted on the mounting substrate 5 is an example, and is not particularly limited. In the plurality of LEDs 2 arranged in a two-dimensional array, the column direction is a direction parallel to the first direction described above, and the row direction is a direction parallel to the second direction described above. The second lens surface 32 of the lens 3 is formed such that the length in the first direction is longer than the length in the second direction. The first lens surface 31 of the lens 3 is formed so that the length in the first direction is shorter than the length in the second direction.

  In the illumination device 1, it is preferable that i LEDs 2 arranged in the column direction are arranged at equal intervals. Moreover, as for the illuminating device 1, it is preferable that j piece LED2 located in a line direction is arrange | positioned at equal intervals. The illuminating device 1 is different in the interval between the two LEDs 2 adjacent in the column direction (first interval) and the interval between the two LEDs 2 adjacent in the row direction (second interval). Is set longer than the second interval. Thereby, the illuminating device 1 has the space | interval (3rd space | interval) of the 2nd lens surfaces 32 of the two lenses 3 adjacent in a 1st direction, and the 2nd lens surface 32 of the two lenses 3 adjacent in a 2nd direction. It is possible to make the interval (fourth interval) the same.

  The mounting substrate 5 includes a support 6 and a wiring portion (not shown) supported by the support 6 and electrically connected to the plurality of LEDs 2. The lighting device 1 may have a configuration in which a plurality of LEDs 2 are connected in series, may have a configuration connected in parallel, or may have a configuration connected in series and parallel. It is preferable that the power supply first connector 10 (see FIGS. 2 and 3) is mounted on the mounting substrate 5. The first connector 10 is electrically connected and mechanically connected to a second connector (not shown) to which an electric wire for supplying power to the lighting device 1 is connected.

  The support 6 has a function of supporting the wiring part. The support 6 preferably has a function as a heat sink for efficiently transferring the heat generated by each LED 2 to the outside. The support 6 is preferably formed of a material having high thermal conductivity from the viewpoint of improving heat dissipation.

  For this reason, it is preferable to form the support body 6 by the resin substrate whose heat conductivity is 1 W / m * K or more, for example. Examples of the material of such a resin substrate include glass cloth / glass nonwoven fabric base epoxy resin formed so as to have a thermal conductivity of 1 W / m · K or more. That is, as the material of the resin substrate, for example, CEM-3 (Composite epoxy material-3) formed so as to have a thermal conductivity of 1 W / m · K or more can be employed. In this case, as the mounting substrate 5, for example, R-1787 (product number) of high thermal conductivity glass composite substrate material “ECOOL (registered trademark)” manufactured by Panasonic Corporation can be used.

The support 6 is not limited to a resin substrate, and may be formed of, for example, an aluminum nitride substrate, a sapphire substrate, a silicon carbide substrate, or the like. Further, the support 6 may have a configuration in which an electrical insulating layer is formed on the surface of a silicon substrate, or a configuration in which an electrical insulating layer made of an appropriate material is formed on the surface of a metal plate. The material of the metal plate is preferably a metal having high thermal conductivity. As the material of the metal plate, for example, copper, aluminum, silver, iron, aluminum alloy, phosphor bronze, copper alloy, nickel alloy, Kovar, or the like can be adopted. For example, SiO ₂ or Si ₃ N ₄ can be used as the material of the electrical insulating layer formed on the surface of the silicon substrate.

  As for the mounting substrate 5, the support body 6 is formed in flat form. The mounting substrate 5 is not limited to the shape of the support 6 in a flat plate shape, and may be one in which, for example, a concave portion that accommodates each LED 2 is formed on one surface.

  The outer peripheral shape of the support 6 is rectangular. The outer peripheral shape of the support 6 is not limited to a rectangular shape, and may be, for example, a polygonal shape other than a rectangular shape, a circular shape, or the like.

  The lens array 4 includes a base portion 41 whose outer peripheral shape is formed in a rectangular shape. In the base portion 41, the lens 3 is formed at each part corresponding to each lens 3. In the lens array 4, a plurality of lenses 3 are arranged in a two-dimensional array of 3 rows and 14 columns, with the longitudinal direction of the base portion 41 as the row direction and the short direction as the column direction. Therefore, the lens array 4 includes 42 lenses 3. The number of lenses 3 in the lens array 4 is not particularly limited, and it is sufficient that at least the same number of lenses 3 as the number of LEDs 2 is provided. Thereby, the lens array 4 can control the light distribution of the light emitted from each LED 2 by each lens 3. In each lens 3, the first lens surface 31 has a concave curved surface shape and the second lens surface 32 has a convex curved surface shape, but both the first lens surface 31 and the second lens surface 32 are aspherical surfaces. The second lens surface 32 is preferably an aspherical surface whose curvature changes continuously. Thereby, the illuminating device 1 can suppress the uneven brightness on the irradiated surface.

  As a material of the lens array 4, a material having a high transmittance for visible light is preferable. The material of the lens array 4 is preferably a material with high moldability. For this reason, the lens array 4 is constituted by a molded product of acrylic resin. The material of the lens array 4 is not limited to acrylic resin, and for example, polycarbonate resin, glass, or the like may be employed.

  In the lighting device 1, the mounting substrate 5 is attached to the attachment plate 9 by a plurality of first screws 8 (see FIG. 2). Here, the mounting substrate 5 has a plurality of first holes 52 (see FIG. 3) through which the first screws 8 are inserted. The mounting plate 9 has a plurality of first through holes (not shown) through which the first screws 8 are inserted. In the lighting device 1, the first screw 8 is inserted into the first hole 52 of the mounting substrate 5 and the first through hole of the mounting plate 9, and the screw portion of the first screw 8 is fitted to the first nut (not shown). By mounting, the mounting substrate 5 is attached to the attachment plate 9.

  In the illumination device 1, the lens array 4 is attached to the attachment plate 9 by a plurality of second screws 7 (see FIG. 2). The lens array 4 is provided with two fixing pieces 42 protruding from two side surfaces along the longitudinal direction of the base portion 41, and a cutout portion 42 a through which the second screw 7 is passed is formed in each fixing piece 42. Has been. Here, the mounting substrate 5 has a plurality of second holes 51 (see FIG. 3) through which the second screws 7 are inserted. The number of the fixing pieces 42 is not particularly limited. The mounting plate 9 is formed with a plurality of second through holes (not shown) through which the respective second screws 7 are inserted. The illuminating device 1 passes the second screw 7 through the notch portion 42a of the lens array 4, the second hole 51 of the mounting substrate 5, and the second through hole of the mounting plate 9, and the screw portion of the second screw 7 is a second nut. The lens array 4 is attached to the mounting substrate 5 and the attachment plate 9 by fitting with each other (not shown). The lens array 4 may be fixed only to the mounting substrate 5.

  In the illuminating device 1, the optical axis L1 of each lens 3 is obliquely inclined (inclined) with respect to the normal L0 set at the center point of the light extraction surface 2a of each LED2. In other words, the illuminating device 1 includes, in each pair of the lens 3 and the LED 2 that are associated in a one-to-one relationship, a normal L0 that is set at the center point of the optical axis L1 of the lens 3 and the light extraction surface 2a of the LED 2, Are non-parallel. Further, in the lens array 4, in the group of lenses 3 arranged in the first direction, the optical axes L1 of the lenses 3 are not parallel to each other. The light extraction surface 2 a of the LED 2 is the surface 22 a of the wavelength conversion unit 22.

FIG. 1 is a schematic cross-sectional view corresponding to one plane including the optical axis L1 of each lens 3 in a group of lenses 3 arranged in the first direction. A group of lenses 3 arranged side by side in the first direction have different shapes so that their optical axes L1 intersect at one point on the irradiated surface side of the illumination device 1. In the group of lenses 3 arranged in the first direction, the shapes of the first lens surfaces 31 are different from each other , and the shapes of the second lens surfaces 32 are different from each other (see FIG. 4).

In FIG. 1, the inclination angle (first inclination angle) of the optical axis L1 in the counterclockwise direction with respect to the optical axis L1 of the middle lens 3 among the three lenses 3 is defined as + θ, and the clockwise direction. The inclination angle (second inclination angle) of the optical axis L1 is shown as -θ. 0 ° means that the lens 3 is not inclined with respect to the optical axis L1 of the middle lens 3. The lens array 4 is formed by tilting the optical axis L1 of the lens 3 on the left side of FIG. 1 by −θ with respect to the optical axis L1 of the middle lens 3 among the lenses 3 in the group of lenses 3 arranged in the first direction, and moving the right side. The optical axis L1 of the lens 3 is inclined by + θ with respect to the optical axis L1 of the middle lens 3. Thereby, the illuminating device 1 can suppress uneven color on the irradiated surface. FIG. 12A shows the result of a simulation of the color of the irradiated surface irradiated with light from the illumination device of the comparative example. FIG.12 (b) shows the result of having simulated about the color of the to-be-irradiated surface irradiated with the light from the illuminating device 1 of embodiment. The illumination device of the comparative example is different from the illumination device 1 of the embodiment only in that all the lenses 3 have the same shape. In the simulation, the LED chip 21 of the LED 2 is a blue LED chip having an emission peak wavelength of 450 nm, the translucent material of the wavelength conversion unit 22 is a silicone resin, and the wavelength conversion material is yellow made of Y ₃ Al ₅ O ₁₂ : Ce ^3+. A phosphor was used. As a result of the simulation, it was confirmed that in the lighting device 1 of the present embodiment, the uneven color of the irradiated surface is suppressed as compared with the lighting device of the comparative example. In addition, in the illuminating device 1 of this embodiment, + θ is set to + 8 ° and −θ is set to −8 °. However, these numerical values are examples and are not particularly limited.

  The principle of suppressing color unevenness on the irradiated surface will be described with reference to the estimation mechanism diagram of FIG. Note that the lighting device 1 of the present embodiment is within the scope of the present invention even if the estimation mechanism is different.

  FIG. 13 shows three lenses 3 having different shapes on the left side of each of the upper, middle, and lower stages, and each lens 3 emits from each lens 3 to the right side of each lens 3 and irradiates the irradiated surface. The in-plane distribution of the color in the illumination range E0 of the emitted light is typically described. In addition, the alternate long and short dash line drawn along the vertical direction on the right side of FIG. 13 is for showing the relative positional relationship of the irradiated surface by each of the three lenses 3. In FIG. 13, it is assumed that each lens 3 is arranged such that the left side of the lens 3 is the upper side and the right side is the lower side. In FIG. 13, the middle lens 3 forms an illumination range E0 on the side closer to the illumination range E0 of the upper lens 3, and the lower lens in FIG. 13 is farther than the illumination range E0 of the upper lens 3. It shows that the illumination range E0 is formed on the side. Each illumination range E0 is divided into a region E1 that is blue with white and a region E2 that is white with yellow. FIG. 13 is based on the premise that the light from the LED 2 having the same specification is incident on each lens 3.

  The inventors of the present application estimated that the uneven color on the irradiated surface is suppressed by superimposing the light emitted from the three lenses 3 having different shapes as shown in FIG.

  The illumination device 1 has a lens array 4 such that the light distribution angle (second light distribution angle) in the cross section along the second direction is larger than the light distribution angle (first light distribution angle) in the cross section along the first direction. The shape and arrangement of each lens 3 in FIG. Thereby, the illuminating device 1 can implement | achieve a more preferable light distribution characteristic, when using as an illumination light source of the lighting fixture for tunnels. The lighting device 1 has the first light distribution angle set to 30 ° and the second light distribution angle set to 120 °, but is not limited to these values. The lighting device 1 is not limited to a tunnel lighting fixture, and may be applied as an illumination light source such as a road lighting fixture, a street lighting fixture, an indoor lighting fixture, and a facility lighting fixture.

  Below, the lighting fixture 70 provided with the illuminating device 1 as an illumination light source is demonstrated based on FIG. The lighting fixture 70 is a tunnel lighting fixture that is attached to a wall surface (side wall) in a tunnel and used for basic lighting. The lighting device 1 uses white LEDs having a light source color of neutral white and a correlated color temperature of 5000K as the LEDs 2. The light source color of LED is defined by JIS Z9112: 2012, for example. In JIS Z9112: 2012, the light source colors of LEDs are classified into five types of daylight color, daylight white, white, warm white, and light bulb color according to chromaticity in the XYZ color system. In JIS Z9112: 2012, the range of correlated white color temperature of daytime white is defined as 4600K-5500K.

  The lighting fixture 70 includes a fixture main body 71 formed in a rectangular box shape with one side open, the lighting device 1 housed in the fixture main body 71, a power supply device 78, and predetermined power from the power supply device 78 to the lighting device 1. And a control unit 73 for controlling the power supply device 78 so as to be supplied. The power supply device 78 includes a first circuit module in which a plurality of circuit components for configuring a power supply circuit are mounted on a first printed wiring board, and a first case that houses the first circuit module. In the first circuit module, a power circuit is formed by a plurality of circuit components for constituting the power circuit and the first printed wiring board. The power supply circuit is an AC-DC converter that converts an AC voltage from an external AC power source into a predetermined DC voltage and outputs the same. The control unit 73 includes a second circuit module in which a plurality of circuit components for configuring a control circuit are mounted on a second printed wiring board, and a second case that houses the second circuit module. In the control unit 73, a control circuit is formed by a plurality of circuit components for constituting the control circuit and the second printed wiring board.

  The lighting fixture 70 has a terminal block 76 housed in the fixture main body 71, and is configured such that the power supply device 78 and the control unit 73 can be electrically connected to an AC power source via the terminal block 76. The instrument main body 71 is provided with a connecting portion 77 to which a power cable from an AC power source is connected.

  The lighting fixture 70 includes a transparent cover 79 that closes the opening of the fixture main body 71, and the cover 79 is attached so as to close the opening of the fixture main body 71. The shape of the cover 79 is a rectangular plate shape. The lighting fixture 70 includes a packing 81 interposed between the inner side surface of the opening in the fixture body 71 and the outer side surface of the cover 79. The packing 81 is formed in a rectangular frame shape. The packing 81 has a rubber property, and is formed so as to be elastically deformed and contact over the entire outer surface of the cover 79. In the lighting fixture 70, one end of the cover 79 in the short direction is attached to the fixture main body 71 by a hinge 74. Thereby, the lighting fixture 70 is attached to the fixture main body 71 so that the cover 79 can rotate between the 1st position which closes the opening part of the fixture main body 71, and the 2nd position which open | releases an opening part. In short, the lighting fixture 70 is configured so that the opening of the fixture main body 71 can be opened and closed by the cover 79.

  In addition, the lighting fixture 70 includes a latch 75 for holding the cover 79 in a first position where the opening of the fixture main body 71 is closed. The lighting fixture 70 has a hinge 74 attached to one side of two sides along the longitudinal direction of the fixture main body 71 and a latch 75 attached to the other side. Therefore, the latch 75 is configured so that one end of the latch 75 can press the other end of the cover 79 attached to the hinge 74. The lighting fixture 70 includes two hinges 74 and two latches 75, but the number thereof may be one or three or more.

  In the lighting fixture 70, two mounting brackets 72 are fixed to the back surface of the fixture body 71 (the lower surface in FIG. 14B). Each mounting bracket 72 is formed in an elongated rectangular shape. Each mounting bracket 72 is longer than the length of the instrument body 71 in the short direction. Each mounting bracket 72 has long holes 72a formed at both ends in the longitudinal direction. The long hole 72 a is formed so that the major axis direction coincides with the width direction of the mounting bracket 72. Since the lighting fixture 70 includes the mounting bracket 72, the lighting fixture 70 can be fixed to the wall surface in the tunnel with a third screw (not shown).

  The material of the instrument body 71 is preferably a material with high corrosion resistance, and stainless steel is preferable. As the stainless steel employed as the material of the instrument main body 71, for example, austenitic stainless steel is preferable, and SUS304 (18Cr-8Ni) and the like can be exemplified. The mounting bracket 72 can be formed of, for example, a steel plate. The cover 79 can be formed of tempered glass, for example. The packing 81 can be formed of, for example, silicone rubber. The material of the hinge 74 and the latch 75 is preferably a material having high corrosion resistance, and is preferably stainless steel. As the stainless steel employed as the material of the instrument main body 71, for example, austenitic stainless steel is preferable, and examples thereof include SUS316 (16Cr-10Ni-2.5Mo).

  The lighting fixture 70 has a jet-proof structure in order to suppress deterioration of optical characteristics and electrical characteristics due to smoke, water, antifreezing agents, and the like in the tunnel.

  In the lighting device 1 described above, the three lenses 3 are arranged in the first direction. However, the number of the lenses 3 arranged in the first direction is not limited to three, and may be two or four or more.

  Moreover, although the illuminating device 1 is provided with the mounting board | substrate 5 with which several LED2 was mounted, it is not restricted to this, As a structure provided with the several mounting board | substrate (not shown) in which each LED2 was mounted, respectively. Good.

  Each figure explained in the above-mentioned embodiment etc. is typical, and the ratio of each size and thickness of each component does not necessarily reflect the actual size ratio. In addition, the materials, numerical values, and the like described in the embodiments and the like are merely preferable examples and are not limited thereto. Furthermore, the present invention can be appropriately modified in configuration without departing from the scope of its technical idea.

1 Lighting device 2 LED
3 Lens 4 Lens Array 5 Mounting Board 31 First Lens Surface 32 Second Lens Surface 70 Lighting Equipment L1 Optical Axis

Claims (5)

A plurality of LEDs, and a lens array having a plurality of lenses,
The lens array is arranged such that the plurality of lenses cover each of the plurality of LEDs,
The plurality of lenses include a first lens surface on which light from each of the plurality of LEDs is incident, and a second lens surface on which light from each of the plurality of LEDs is emitted, and each of the plurality of LEDs from each of the plurality of LEDs. Configured to diffuse and emit light,
The plurality of lenses have asymmetric shapes with respect to the optical axes of the plurality of lenses,
A group of lenses that are arranged in the first direction among the plurality of lenses, Ri Ah with different mutual shape such that optical axes intersect,
In the lens array, the plurality of lenses are arranged in a two-dimensional array, and a group of lenses arranged in a second direction orthogonal to the first direction among the plurality of lenses has the same shape. Formed in the
A lighting device characterized by that. In the plurality of lenses, the first lens surface has a concave curved surface shape, and the second lens surface has a convex curved surface shape,
The lighting device according to claim 1. A mounting board on which the plurality of LEDs are mounted;
The lighting device according to claim 1 or 2. A plurality of mounting boards on which each of the LEDs is mounted;
The lighting device according to claim 1 or 2. The illumination device according to any one of claims 1 to 4 is provided as an illumination light source.
A lighting apparatus characterized by that.