JP2016039039A - Lighting system and vehicle equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve appearance of a cabin by suppressing illuminance unevenness in an illumination system.SOLUTION: An illumination system 1 includes: a plurality of long illumination devices 1; and diffusion reflectors such as a ceiling W or a wall C for diffusing and reflecting the light emitted from the illumination devices 1. The diffusion reflector has: a curved surface 13 with a longitudinal direction of the illumination device 1 being an axis; and a groove 12 provided in the direction orthogonal to the longitudinal direction. The plurality of illumination devices 1 are arranged in a row-shape along the longitudinal direction so as to have separation parts 14 of a predetermined distance at positions for sandwiching the groove 12, and they irradiate at least one part region of the diffusion reflectors including the grooves 12 with light in an overlapping manner. With this configuration, by overlapping irradiation ranges of the illumination devices 1, drop in illuminance right under the separation parts 14 is prevented, illuminance unevenness is suppressed, and by radiating light from both sides of the grooves 12, the grooves 12 become inconspicuous, and appearance in a cabin can be improved.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an illumination system using a linear light source and a vehicle including the same.

  LEDs are attracting attention as light sources that can replace incandescent lamps and fluorescent lamps because they can emit light with high power and high luminance and have a long lifetime. As a lighting device using such an LED as a light source, a linear light-emitting device including a plurality of LEDs arranged in a row, a substrate on which the LEDs are mounted, and a long casing that houses them. Is known (see, for example, Patent Document 1). The light-emitting device as described above is frequently used for lighting, for example, passages and ceilings of vehicles such as airplanes and trains, wall surfaces on the window side, and the like.

JP2013-118169A

  However, in the linear light emitting device as described above, a power supply connector or the like is usually provided at the end in the longitudinal direction, and the LED is not provided up to the end of the device. Moreover, when arrange | positioning between the some light-emitting devices in a line form along a longitudinal direction, the separation part which considered installation is provided. Therefore, for example, when a plurality of light emitting devices are arranged, light is not sufficiently emitted from between the end portions of adjacent light emitting devices. As a result, illuminance unevenness occurs on the irradiated surface irradiated with light from the light emitting device. In particular, the inner walls and storage shelves of aircraft cabins are unitized by a plurality of panels, etc. with a predetermined length in the direction of travel of the aircraft. It looks prominent and looks bad in the cabin.

  On the other hand, in order to arrange a plurality of linear light emitting devices so as to be close to each other, it becomes difficult to accommodate the wiring around the connector, and the interval for attachment becomes narrow, resulting in poor workability. In addition, for example, when they are used in a vehicle such as an airplane or a train, adjacent light emitting devices may come into contact with each other due to vibration or the like to generate an abnormal noise, or a part of the device may be damaged.

  The present invention solves the above-described problem, and provides an illumination system that is mainly used for illumination of vehicles such as airplanes and trains, and that can suppress uneven illumination and improve the appearance of the cabin. With the goal.

  An illumination system according to the present invention includes a plurality of elongated linear light sources, and a diffuse reflector that diffusely reflects light emitted from the linear light source, and the diffuse reflector includes the linear light source. A position having a curved surface with the longitudinal direction as an axis and a groove provided in a direction orthogonal to the longitudinal direction, and the plurality of linear light sources sandwich the groove in a row along the longitudinal direction. It is arranged so as to have a separation portion of a predetermined distance, and at least a part of the diffuse reflector including the groove is irradiated with light overlappingly.

  In the illumination system, the linear light source is disposed to face the light emitting unit, a substrate on which the light emitting unit is mounted, and the light emitting unit, and controls light distribution of light emitted from the light emitting unit. An optical member, and the optical member has, at the end in the longitudinal direction of the linear light source, a reflection part that reflects light guided in the end direction in the normal direction of the substrate. Is preferred.

  In the illumination system, it is preferable that the optical member has a concave portion that is provided in a relative portion facing the light emitting portion and accommodates the light emitting portion, and an edge portion of the concave portion is in contact with the substrate. .

  The vehicle of the present invention includes the above-described lighting device.

  According to the present invention, by overlapping the irradiation range of the linear light source, it is possible to prevent a decrease in illuminance immediately below the separation portion of each linear light source, to suppress uneven illuminance, and to irradiate light from both sides of the groove. , Make the groove less noticeable and improve the appearance of the room.

1 is a cross-sectional view of an aircraft provided with an illumination system according to an embodiment of the present invention. The perspective view of the linear illuminating device used for the said illumination system. The perspective view of the said illuminating device. Sectional drawing in the transversal direction of the said illuminating device. Sectional drawing of the edge part in the longitudinal direction of the said illuminating device. 1 is an enlarged cross-sectional view of a part of an aircraft provided with an illumination system. The front view by the side of the wall surface of the aircraft provided with the said illumination system.

  An illumination system according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the illumination system 10 of the present embodiment includes a long linear light source (hereinafter referred to as the illumination device 1) and a diffuse reflector (ceiling C) that diffusely reflects light emitted from the illumination device 1. And wall surface W). For example, the lighting device 1 is attached to the upper end portion and the side end portion of the storage shelf OB along the passenger passage P in the cabin CA of the aircraft AP, and mainly illuminates the ceiling C and the wall surface W (the lighting device 1). The light emitted from is indicated by a dashed arrow). The ceiling C and the wall surface W are configured to have diffuse reflectivity when the surface is painted white and subjected to fine unevenness (texture) treatment, and functions as a diffuse reflector.

  As shown in FIG. 2, the ceiling C and the wall surface W are unitized by a plurality of panels 11C and 11W with a predetermined length in the traveling direction of the aircraft AP. Each panel 11C, 11W is curved so as to follow the fuselage shape of the aircraft AP. Moreover, the connection part of the several panels 11C and 11W is the groove | channel 12 which became depressed rather than the panel surface. That is, the ceiling C and the wall surface W (diffuse reflector) have a curved surface 13 with the longitudinal direction of the lighting device 1 as an axis, and a groove 12 provided in a direction orthogonal to the longitudinal direction. Moreover, the some illuminating device 1 is arrange | positioned so that it may have the separation | spacing part 14 of predetermined distance in a line form along the longitudinal direction. The storage shelf OB is similar to the ceiling C and the wall surface W.

  As shown in FIG. 3, the illumination device 1 includes a light source unit 2, an optical member (lens 3) provided to face the light source unit 2, and a housing 4 that holds the lens 3 and accommodates the light source unit 2. And comprising. The lighting device 1 also includes a power feeding connector 5 provided at an end portion in the longitudinal direction thereof and connected to an external power source (not shown) or another lighting device 1.

  The light source unit 2 includes a plurality of light source units 6 (light emitting units) arranged in a line. Each of the light source units 6 includes a plurality of LEDs 7 that emit light of different colors as light sources. In the illustrated example, a red LED 7R that emits red light, a green LED 7G that emits green light, and a blue LED 7B that emits blue light. And white LED 7W that emits white light. In each light source unit 6, these LEDs 7 are arranged in a line in the order of LED 7R, LED 7G, LED 7B, and LED 7W. LED7R, LED7G, LED7B, and LED7W are each connected to the circuit part 22 (refer FIG. 3 mentioned later), and light control is controlled mutually independently. Thereby, the light source unit 6 can emit light of various color temperatures.

  The lens 3 controls the light distribution of the light emitted from the light source unit 2. The lens 3 is formed in a long shape that collectively covers the light source unit 2 in a plan view, and is made of a light-transmitting material such as polycarbonate resin or acrylic resin.

  The casing 4 includes a long frame body 41 having a rectangular shape in cross section, a pair of flat side walls 42 that seals both ends in the longitudinal direction of the frame body 41, and a part of one surface of the frame body 41 in the longitudinal direction. And an opening 43 provided over the entire area. The light source unit 2 is accommodated in the housing 4 so as to face the opening 43, and the lens 3 is held by the housing 4 so as to close the opening 43. The frame body 41 and the side wall 42 are made of a material having excellent rigidity and heat dissipation, such as aluminum, copper, iron, PBT (polybutylene terephthalate) resin, polycarbonate resin, ceramic, or a translucent material. When the side wall 42 is made of a translucent material, light can be emitted also from both ends in the longitudinal direction of the lighting device 1.

  As shown in FIG. 4, the light source unit 2 includes a wiring board 21 on which the LED 7 is mounted, a circuit unit 22 that controls power feeding to the LED 7, and an insulating sheet 23 that insulates the wiring board 21 and the housing 4. Also have. The wiring board 21 has the LED 7 mounted on one surface thereof so that the optical axis Ax of the LED 7 is orthogonal to the wiring board 21. The circuit unit 22 is disposed adjacent to the LED 7 on the LED mounting surface of the wiring board 21. The LED mounting surface of the wiring board 21 is subjected to high reflection processing such as white coating. The insulating sheet 23 is disposed between the surface of the wiring substrate 21 opposite to the LED mounting surface and the housing 4.

  The lens 3 is constituted by a condensing lens that distributes light emitted from the LED 7 substantially parallel to the optical axis Ax direction, and a pair of engagements used for engagement with the housing 4 at both ends in the short direction. There are joint portions 31 and 32. The lens 3 includes a relative portion 33 opposed to the wiring substrate 21, a concave portion 34 provided on the relative portion 33 to which light emitted from the LED 7 is incident, and light emitted at a wide angle with respect to the optical axis Ax. It further has a total reflection surface 35 that reflects and an emission surface 36 that emits light.

  The engaging portions 31 and 32 are provided along a side extending in the longitudinal direction of the lens 3 (a direction from the front side to the back side in FIG. 4), and are formed in a hook shape extending in a direction perpendicular to the optical axis Ax. ing. The edge (the illustrated relative portion 33) of the concave portion 34 is in contact with the wiring board 21. Therefore, the light emitted from the LED 7 is effectively attenuated from the concave portion 34 to the lens 3 without being attenuated in the illumination device 1 as compared with, for example, a case where there is a gap between the lens 3 and the wiring board 21. As a result, the light utilization efficiency is improved.

  The frame body 41 includes a first frame body 44 provided so as to cover the circuit unit 22 and a second frame body 45 that holds the light source unit 2. The first frame body 44 has a holding portion 46 that engages with the engaging portion 31 and is used to hold the lens 3. The holding portion 46 is formed in a substantially C shape that is open so as to sandwich the engaging portion 31 in the cross section in the short direction of the lighting device 1.

  The holding portion 46 is bonded to the engaging portion 31 with the adhesive 8. Note that a light-transmitting material is used for the holding portion 46 and the adhesive 8, and the refractive indexes of the materials constituting the first frame body 44, the adhesive 8, and the engaging portion 31 are substantially the same as each other, or the first You may comprise so that the frame 44, the adhesive agent 8, and the engaging part 31 may become small in order. In this way, the light guided to the engaging portion 31 can be guided to the holding portion 46 and emitted to the outside. Moreover, since the total reflection of the light between the 1st frame 44 and the adhesive agent 8 and between the adhesive agent 8 and the engaging part 31 is suppressed, the light which LED7 emitted | emitted efficiently goes out of an apparatus. It can be taken out.

  The second frame 45 has a holding portion 47 that engages with the engaging portion 32. The holding portion 47 is formed in the same manner as the holding portion 46, and the engaging portions 31, 32 are slid into the holding portions 46, 47, so that the lens 3 is slid onto the frame body 41 along the longitudinal direction thereof. Is done. Thereby, the lens 3 can be easily attached to the frame body 41 and the LED 7 at a predetermined position. The second frame 45 is made of, for example, a material having excellent rigidity and heat dissipation, such as aluminum, and dissipates heat generated in the LED 7 and the circuit unit 22 to the outside through the wiring substrate 21 and the insulating sheet 23. . When the LED 7 is turned on in the illumination device 1 configured as described above, most of the light emitted from the LED 7 is refracted by the lens 3 in the direction of the optical axis Ax and irradiated to the outside.

  As shown in FIG. 5, the lens 3 reflects the light guided from the LED 6 toward the end of the lighting device 1 in the longitudinal direction, in the normal direction (optical axis Ax) of the wiring board 21. A reflection part 37 is provided. Although the connector 5 is provided at the end of the lighting device 1 and the LED 6 is not provided, the light guided in the longitudinal direction of the lens 3 is reflected by the reflecting portion 37, whereby the lighting device 1. Light can also be emitted from the end of the. In addition, this makes it possible to widen the light distribution in the cross section in the longitudinal direction of the illuminating device 1, and when a plurality of the illuminating devices 1 are arranged so as to have the separation portions 14 (see also FIG. 2) The separation portion 14 can also be irradiated with light.

  As described above, the lens 3 is a condensing lens that mainly collects light in the optical axis direction Ax, and the light distribution in the short-side cross section of the illumination device 1 is within a predetermined angular range. Here, as shown in FIG. 6, the curved surface 13 of the ceiling C, the wall surface W, and the surface of the storage shelf (diffuse reflector) has a circumferential edge that is ½ of the central luminous intensity of the lighting device 1 and the irradiation device. 1, that is, along the outer edge of the 1/2 beam angle of the illumination device 1. If it carries out like this, the wide range, such as the ceiling C and the wall surface W, can be illuminated efficiently.

  In the illumination system 10 of the present embodiment, as shown in FIG. 7, the plurality of illumination devices 1 are arranged in a line along the longitudinal direction so as to have the separation portions 14 at positions where the grooves 12 are sandwiched. At least a part of the area LA of the wall surface W (panel 11W: diffuse reflector) including the groove 12 is irradiated with light in an overlapping manner. The separation portion 14 is appropriately set according to the distance from the diffuse reflector such as the ceiling C and the wall surface W. For example, if the shortest distance between the lighting device 1 and the wall W on which it is provided is 20 mm, it is 30 mm, preferably 15 mm, and if the shortest distance is 40 mm, it is 40 mm, preferably 20 mm.

  Thus, even when the plurality of lighting devices 1 are arranged so as to have the separation portion 14, the illumination range of the lighting device 1 is overlapped to prevent a decrease in illuminance immediately below the separation portion 14, and uneven illuminance. Can be suppressed. Moreover, by irradiating light from both sides of the groove 12, the groove 12 can be made inconspicuous, and the appearance in the cabin can be improved.

  In addition, the illuminating device according to the present invention is not limited to the above embodiment, and various modifications can be made. For example, the illumination device may further include a diffusion member that diffuses the light emitted from the lens 3. Further, a diffusion material may be added to the constituent material of the lens 3 or the dimples may be integrally formed to diffuse the lens 3. The lens 3 may be a thin Fresnel lens. In this case, since the lens 3 can be thinned, the light emitting device can be thinned. Moreover, the light source which comprises a light source part is not limited to LED, For example, a straight tube | pipe type fluorescent lamp may be sufficient. Further, the vehicle on which the lighting device is installed is not limited to an aircraft, and may be a train or a bus, for example.

1 Illumination device (linear light source)
10 Illumination system 11C, 11W Panel (diffuse reflector)
12 groove 13 curved surface 21 wiring board (board)
3 Optical members (lenses)
33 Relative part 34 Concave part 37 Reflecting part 6 Light source unit (light emitting part)
AP Aircraft (vehicle)
Ax Optical axis C Ceiling (diffuse reflector)
W wall (diffuse reflector)

Claims (4)

An illumination system comprising a plurality of elongated linear light sources, and a diffuse reflector that diffusely reflects light emitted from the linear light sources,
The diffuse reflector has a curved surface with the longitudinal direction of the linear light source as an axis, and a groove provided in a direction orthogonal to the longitudinal direction,
The plurality of linear light sources are arranged in rows along the longitudinal direction so as to have a separation portion of a predetermined distance at a position sandwiching the groove, and at least in a region of the diffuse reflector including the groove An illumination system characterized by overlapping light irradiation. The linear light source includes a light emitting unit, a substrate on which the light emitting unit is mounted, and an optical member that is disposed so as to face the light emitting unit and controls light distribution of light emitted from the light emitting unit. Have
2. The optical member according to claim 1, wherein the optical member has a reflection portion that reflects light guided in the end direction in a normal direction of the substrate at an end portion in a longitudinal direction of the linear light source. The lighting system described. The optical member has a concave portion that is provided in a relative portion facing the light emitting portion and accommodates the light emitting portion,
The illumination system according to claim 2, wherein an edge portion of the concave portion is in contact with the substrate.   A vehicle comprising the illumination system according to any one of claims 1 to 3.

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