WO2012105314A1 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage Download PDF

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Publication number
WO2012105314A1
WO2012105314A1 PCT/JP2012/050893 JP2012050893W WO2012105314A1 WO 2012105314 A1 WO2012105314 A1 WO 2012105314A1 JP 2012050893 W JP2012050893 W JP 2012050893W WO 2012105314 A1 WO2012105314 A1 WO 2012105314A1
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WO
WIPO (PCT)
Prior art keywords
light
light source
illumination
incident
emitted
Prior art date
Application number
PCT/JP2012/050893
Other languages
English (en)
Japanese (ja)
Inventor
佳恵 清水
谷尻　靖
山口　宏
Original Assignee
コニカミノルタオプト株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by コニカミノルタオプト株式会社 filed Critical コニカミノルタオプト株式会社
Priority to JP2012555785A priority Critical patent/JP5768821B2/ja
Priority to CN2012800072314A priority patent/CN103348183A/zh
Publication of WO2012105314A1 publication Critical patent/WO2012105314A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/40—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of hollow light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type

Definitions

  • the present invention relates to an illuminating device, for example, an illuminating device that is disposed in a showcase or the like and is suitable for illuminating a product displayed in the showcase.
  • Fluorescent lamps have been widely used to illuminate products placed in showcases and displayed in showcases.
  • Fluorescent lamps are generally used as illumination by converting electric energy into visible radiation, infrared radiation, and ultraviolet radiation and emitting visible light.
  • heat loss occurs, there is a problem that not only the fluorescent lamp itself but also the displayed product is heated by the radiant heat from the fluorescent lamp, and the light source of the lighting device for the showcase is not necessarily preferable. That's not true.
  • LEDs Light Emitting Diodes
  • the blue LED chip was developed, a white LED light source that emits white light by combining the blue LED chip and a phosphor that is excited by light from the LED chip and emits excitation light of a predetermined wavelength, A white LED light source that synthesizes white light using three primary color LED chips of a blue LED chip, a green LED chip, and a red LED chip has been developed.
  • an LED illumination device provided with this white LED light source is used as the illumination device.
  • a lighting device for a display shelf such as a showcase
  • a showcase that already has LED lighting that illuminates the display room from above is already available. It has been proposed (see, for example, Patent Document 1).
  • the lighting device unit becomes larger or the thickness becomes thicker, which causes a problem of deterioration in design.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an illuminating device that has a desired light distribution characteristic and is capable of highly efficient illumination even with a compact configuration. .
  • the present invention provides a light source, an incident portion that receives light emitted from the light source, and a first light that branches and guides light incident on the incident portion in two different directions.
  • An illuminating device that includes a second optical path and first and second emitting portions that emit branched and guided light and has an illumination optical system having a T-shaped cross section, and simultaneously illuminates two different directions
  • the illumination optical system includes a first reflecting unit disposed in proximity to the incident unit and a second reflecting unit disposed to face the incident unit, the first and second emitting units.
  • Illumination light can be configured with a high-efficiency illumination device having desired directivity characteristics and light distribution characteristics. For example, by superimposing the directivity characteristics of two light beams, it is possible to realize an illuminating device that can efficiently illuminate only a necessary region even when a light source having a large divergence angle is used. Therefore, even if it is a compact structure, the illuminating device which has a desired light distribution characteristic and can perform highly efficient illumination can be obtained.
  • the present invention provides the illumination device having the above-described configuration, wherein the illumination optical system includes a third reflection unit that faces the second reflection unit, and the third reflection unit receives light from the second reflection unit and again receives the light. The light is reflected toward the second reflecting portion and then emitted from the emitting portion.
  • the illumination optical system includes a third reflection unit that faces the second reflection unit, and the third reflection unit receives light from the second reflection unit and again receives the light. The light is reflected toward the second reflecting portion and then emitted from the emitting portion.
  • the present invention is characterized in that the illumination device having the above-described configuration is provided with a light beam branching portion that branches light emitted from the light source into light directed to the first and second emission portions. According to this configuration, the illumination light emitted from the light source can be efficiently branched into illumination light for the first emission part and the second emission part having an optical path directed in substantially opposite directions.
  • the present invention is characterized in that, in the illumination device having the above-described configuration, the light beam branching portion is disposed at a position facing the light source of the second reflecting portion, and is configured by a substantially V-shaped convex reflecting surface. According to this configuration, the light that is emitted from the light source, incident from the incident portion, and directly reaches the second reflecting portion without being reflected by the first reflecting portion or the third reflecting portion is reflected by the V-shaped convex reflecting surface. The specific direction can be efficiently illuminated by reflecting the light toward the first emission part side and the second emission part side.
  • this invention is an illuminating device of the said structure,
  • the said illumination optical system is the 3rd surface which becomes the incident surface in which the light radiate
  • a light guide having a surface. According to this configuration, by disposing the light guide in the optical path, the illumination light can be controlled by refraction on each surface of the light guide, so that a higher performance and higher efficiency illumination device can be realized.
  • a light beam branching portion is formed by providing a refractive surface having a substantially V-shaped cross section at a position of the incident surface facing the light source.
  • the third surface is inclined by 1 to 30 degrees from a parallel position with respect to the second surface, and the distance between the second surface and the third surface increases as the distance from the light source increases. Is characterized by gradually narrowing. According to this configuration, the illumination light emitted from the emission surface can be obtained by giving the inclination of the third surface substantially parallel to the second surface and the thickness decreasing from the light source toward the tip of the emission surface. The light can be emitted at an angle along the second surface, and a wide area can be efficiently illuminated even if the width of the illumination optical system is narrow.
  • the third surface is inclined by 50 to 80 degrees from a parallel position with respect to the second surface, and the distance between the second surface and the third surface increases as the distance from the light source increases. Is characterized by narrowing. According to this configuration, by setting the inclination of the third surface to an angle close to the vertical direction of the second surface, the illumination light emitted from the emission surface can be illuminated with high efficiency in the direction close to the second surface. Can do.
  • the second reflecting portion may include a diffusing portion that reflects the incident light while diffusing the incident light in a predetermined angle range at a portion that reflects the reflected light toward the emitting portion. It is characterized by being. According to this configuration, since the light diffused in the predetermined angle range by the second reflecting portion is emitted from the emission surface, it is possible to emit illumination light with improved illuminance unevenness and color unevenness. In addition, since the diffusing unit is provided in a portion close to the emitting unit, the illumination light can be efficiently guided to the vicinity of the emitting unit.
  • the second surface includes a diffusing portion that reflects the incident light while diffusing the incident light in a predetermined angle range at a portion that reflects the reflected light toward the emission surface. It is characterized by that. According to this configuration, even if an illumination optical system including a light guide having a diffusing portion on the reflection surface is used, the light diffused in a predetermined angle range is emitted from the emission surface, so that uneven illuminance and uneven color are reduced. Improved illumination light can be emitted.
  • the present invention is characterized in that, in the illumination device configured as described above, the second reflecting portion is an inclined surface that reflects incident light while diffusing it in a predetermined angle range. According to this configuration, since the light distribution control angle can be expanded by inclining the second reflecting portion, an illuminating device that can efficiently illuminate a necessary region can be realized.
  • the illumination optical system includes a plurality of the light sources arranged in parallel in the longitudinal direction of the T-shaped section at a predetermined interval, and has a long emission portion along the longitudinal direction. It is a feature. According to this configuration, it is possible to illuminate widely in the longitudinal direction of the illumination optical system with high illuminance using a plurality of light sources. In addition, since it has an optical path that guides light while repeatedly reflecting, even if the arrangement pitch of multiple light sources arranged side by side is wide, it can reduce illumination unevenness in the longitudinal direction and illuminate uniformly. Therefore, the cost can be reduced.
  • the present invention is characterized in that the light source is a point light source in the illumination device having the above-described configuration.
  • the point light source here refers to a light source in which, for example, the size of the light emitting surface for emitting light in the horizontal direction is sufficiently small compared to the size of the illumination optical system. With this size, the specific direction can be efficiently illuminated.
  • the present invention is characterized in that the point light source is an LED light source in the illumination device having the above configuration. According to this configuration, a highly efficient lighting device can be realized using an LED light source with high illuminance, low power consumption, and low heat generation.
  • the present invention is characterized in that, in the illumination device having the above configuration, the LED light source is disposed in a V-groove portion having a substantially V-shaped cross section formed on the incident surface. According to this structure, even if it uses LED light source with a big emission angle by arrange
  • the present invention is characterized in that, in the illumination device configured as described above, the light source is a light source including a light emitting surface extending in a direction perpendicular to the T-shaped cross section.
  • the light source is a light source including a light emitting surface extending in a direction perpendicular to the T-shaped cross section.
  • the present invention is characterized in that in the illumination device having the above-described configuration, the illumination device is mounted on a tip portion of a plate-like body and illuminates both sides of the plate-like body. According to this configuration, a compact illumination device that can efficiently illuminate specific directions on both sides of the plate-like body can be realized.
  • the present invention is characterized in that, in the illumination device having the above-described configuration, the plate-like body is a shelf board, and the top and bottom of the shelf board are illuminated simultaneously. According to this structure, it can attach to the front-end
  • the illumination optical system having a T-shaped cross section, the first light reflected by the first reflecting portion and the second reflecting portion and the second reflecting portion without passing through the first reflecting portion. Since the illumination light combined with the second light reflected by the light is emitted from the first and second emission parts, respectively, high-efficiency illumination having desired directivity characteristics and light distribution characteristics is possible. Become. Therefore, even if it is a compact structure, the illuminating device which has a desired light distribution characteristic and can perform highly efficient illumination can be obtained.
  • the light source is described as a point light source, but a light source other than the point light source, for example, a planar light source or a linear light source may be used.
  • 1A includes a point light source 2 and two optical paths that branch and guide light emitted from the point light source 2 in two different directions and have a T-shaped cross section.
  • the illumination optical system 10A is provided. Therefore, the illumination optical system 10A includes an incident portion 1Aa that receives light emitted from the point light source 2, and a first optical path that branches and guides the light incident on the incident portion 1Aa in two different directions.
  • the illumination optical system 10A includes a first reflecting portion 11A disposed close to the incident portion 1Aa, and a second reflecting portion 12A disposed opposite to the incident portion 1Aa.
  • the first reflecting portion 11A and the first reflecting portion 11A Illumination light in which the first light reflected by the second reflecting portion 12A and the second light reflected by the second reflecting portion 12A without passing through the first reflecting portion 11A are combined. It injects from two injection parts.
  • the first and second light beams are incident from the incident portion 1Aa, reflected at least once by the first reflecting portion 11A, and then reflected at least once by the second reflecting portion 12A.
  • Illumination light can be configured with a luminous flux having a high efficiency, and a highly efficient illumination device having desired directivity characteristics and light distribution characteristics can be realized.
  • the illuminating device that can efficiently illuminate only a necessary region even when the point light source 2 having a large divergence angle is used. Therefore, even if it is a compact structure, the illuminating device which has a desired light distribution characteristic and can perform highly efficient illumination can be obtained.
  • a third reflecting portion 13A is provided opposite to the second reflecting portion 12A, and the third reflecting portion 13A receives light from the second reflecting portion 12A and reflects it again toward the second reflecting portion 12A, and then exits.
  • the optical path length can be further increased, and the emitting part can be provided at a position where a desired part is illuminated. Therefore, it is possible to realize an illumination device that can efficiently illuminate a necessary area.
  • the point light source 2 is, for example, an LED light source, and is a white LED light source that emits white light by combining a blue LED chip and a phosphor that is excited by light from the LED chip and emits excitation light of a predetermined wavelength.
  • the illumination optical system 10A can be applied as an optical path of an illumination device that emits white light.
  • the size of the white LED light source for example, a size of about 0.6 mm ⁇ 1.2 mm is widely used.
  • the first light reflected by the second reflecting portion 12A without passing through the first reflecting portion 11A is indicated by a solid line in the drawing from the first emitting portion 1Ad.
  • the second light emitted in the arrow DAa direction (optical path A) and reflected by the first reflecting portion 11A and the second reflecting portion 12A is emitted from the first emitting portion 1Ad in the arrow DBa direction indicated by the broken line in the drawing. (Optical path B).
  • the optical path B includes the first reflecting portion 11A that functions only in the optical path B in addition to the optical path common to the optical path A. Therefore, by controlling the inclination and length of the first reflecting portion 11A, the directivity at the emitting portion is set. Characteristics and light distribution characteristics can be controlled independently of the optical path A.
  • the light beam passing through the optical path A and the light beam passing through the optical path B are overlapped by controlling to emit in substantially the same direction as in the optical path A and the optical path B emitted from the first emitting unit 1Ad shown in the figure.
  • the intensity of the illumination light can be increased and the desired direction can be efficiently illuminated.
  • an illumination optical system capable of efficiently illuminating a desired direction can be configured.
  • the illuminating device 1B of 2nd embodiment is demonstrated using FIG.
  • This illuminating device 1B is also configured to include a point light source 2 and an illumination optical system 10B having a substantially T-shaped cross section, and an incident portion 1Ba that receives light emitted from the point light source 2 and the incident light.
  • a first optical path 1Bb and a second optical path 1Bc for branching and guiding the light incident on the part 1Ba in two different directions; a first exit part 1Bd for emitting the branched and guided light;
  • the first reflecting portion 11B is inclined so that the light path A and the light path B are emitted in different directions, and lighting having two different light distribution centers of gravity from one point light source is enabled. It is an example.
  • the light distribution angle of the illumination light emitted from the emission unit can be controlled by inclining the first upper reflection surface 11Ba and the first lower reflection surface 11Bb. For example, it is possible to change the light distribution angle by inclining so that the distance between them becomes narrower as the distance from the light source increases.
  • the first light reflected by the second reflecting portion 12B without passing through the first reflecting portion 11B is solid line in the figure from the first emitting portion 1Bd.
  • the second light emitted in the direction of the arrow DAb indicated by (optical path Ab) and reflected by the first reflecting portion 11B and the second reflecting portion 12B is emitted from the first emitting portion 1Bd in the direction of the arrow DBb indicated by the broken line in the figure. (Optical path Bb).
  • the illuminating device 1B which branches and guides the light inject
  • the inclination of the first reflecting portion 11B that reflects the light emitted from the point light source 2 and the second reflecting portion 12B that is provided in a close position surrounding the point light source 2 arranged in the incident portion It is possible to control the light distribution characteristics by changing the inclination of the emitting portion which changes depending on the length of the third reflecting portion 13B and the length of the third reflecting portion 13B.
  • the illumination device that guides the light emitted from the point light source 2 to two different exit surfaces via the optical path having a T-shaped cross section has been described above. It is also possible to form using Next, an illumination device having an illumination optical system provided with a light guide will be described.
  • FIG. 3 shows an illuminating device 1C according to a third embodiment using the light guide 3C.
  • the light guide 3C has at least an incident surface on which light emitted from the point light source is incident, a second surface serving as a reflecting portion, and a third surface serving as an emitting portion.
  • the light guide 3C is preferably applied to, for example, an illuminating device that is attached to the tip of a shelf and illuminates the top and bottom of the shelf at the same time, and splits the light emitted from one point light source 2 in two different directions. And guiding it. In this way, since the products displayed on the shelf are illuminated from two directions, upper and lower, it is difficult to produce a shadow, and the object surface can be illuminated uniformly.
  • a light guide 3C includes an incident portion 31C, a first light guide portion 32C (corresponding to a first optical path), and a second light guide portion 33C (corresponding to a second optical path).
  • the cross section is T-shaped, which is emitted in the direction, and is made of, for example, a translucent member (PMMA: acrylic) having a refractive index of about 1.5. Therefore, the total reflection angle is about 42 degrees.
  • a first reflector 11C (a general term that combines the first upper reflector 11Ca and the first lower reflector 11Cb) is provided to hold the incident portion 31C corresponding to the T-shaped shaft section.
  • the LED substrate 21 on which the LED light source constituting the shaped light source 2 is mounted is fixed.
  • the light guide 3C, the first reflecting plate 11C, and the LED substrate 21 are long members whose longitudinal direction is the direction penetrating the drawing, and a plurality of point light sources 2 made of LED light sources are arranged in parallel in the longitudinal direction. The configuration is
  • the incident portion 31C has a V-groove incident surface on the surface facing the point light source 2, and the first incident surface 31Ca and the second incident surface 31Cb that diverge the light beam in two different directions are in a V-groove shape.
  • a light splitting portion is formed by providing a refractive surface having a substantially V-shaped cross section at a position facing the point light source 2 on the incident surface.
  • the LED light source 2 is an LED light source
  • the LED light source is disposed in a V-groove portion having a substantially V-shaped cross section formed on the incident surface. As described above, by arranging the LED light source in the V-groove portion, even if an LED light source having a large emission angle is used, it can be efficiently incident on the optical path, and a highly efficient illumination device can be realized. .
  • the second reflecting plate 12C is attached to the surface (second surface) side facing the incident portion 31C
  • the third reflecting plate 13C is attached to the back surface portion at a position facing the second reflecting plate 12C.
  • the body part constituting the first light guide part 32C of the light guide 3C is sandwiched between the second reflector 12C and the third reflector 13C. That is, the second reflecting plate 12C and the third reflecting plate 13C are members that define the first optical path.
  • the light guide 3C is composed of a transparent body having a refractive index of 1 or more as described above. In this embodiment, it is made of PMMA having a refractive index of about 1.5. However, a light guide made of a material other than this may be used, and a transparent resin such as a glass material or acrylic or polycarbonate other than PMMA may be used depending on the application. It may be used.
  • the light guided through the light guide is totally reflected on the light guide surface when the total reflection condition is satisfied according to the refractive index of the light guide 3C.
  • the light is reflected and does not satisfy the total reflection condition, it once exits the light guide 3C, is reflected by the reflecting plate surface, returns to the light guide again, and is guided to the exit surface.
  • the intersection angle between the first incident surface 31Ca and the second incident surface 31Cb forming the light beam branching portion of the V-shaped cross section is, for example, 120 degrees. This crossing angle is set in the range of 90 to 150 degrees depending on the light emitting surface size and light emitting angle of the point light source 2, the thickness of the light guide 3C, the emission direction of the illumination light, and the like.
  • the light emitted from the point light source 2 through this light beam branching portion is refracted from the straight traveling direction on the entrance surface having a V-shaped cross section, and in two different directions (for example, upward and downward) with respect to the straight traveling direction. The light is branched to the outgoing light and guided through the light guide toward the exit surface.
  • the light beam L1 is emitted from the point light source 2, refracted by the first incident surface 31Ca, reaches the second surface without hitting the first upper reflection plate 11Ca, and is reflected by the second reflection plate 12C outside the second surface. After that, the light is repeatedly reflected from the third reflecting plate 13C, guided to the first exit surface 32Ca, refracted and emitted.
  • the light beam L2 is emitted from the point light source 2, refracted by the second incident surface 31Cb, reaches the second surface without hitting the first lower reflecting plate 11Cb, and is reflected by the second reflecting plate 12C outside the second surface. After that, the light is guided to the second exit surface 33Ca, which is the lower exit surface, and is refracted and emitted.
  • the light beam L3 is emitted from the point light source 2, refracted by the second incident surface 31Cb, totally reflected by the first lower reflecting plate 11Cb, and reaches the second surface. Thereafter, the light is guided to the first exit surface 32Ca by the behavior substantially the same as that of the light beam L1, and is refracted and emitted.
  • the light beam L4 is emitted from the point light source 2, is refracted by the first incident surface 31Ca, is totally reflected by the first upper reflection plate 11Ca, and reaches the second surface. Thereafter, the light is guided to the second exit surface 33Ca by the behavior substantially the same as that of the light beam L3, and is refracted and emitted.
  • the light emitted from the point light source 2 can be used efficiently as illumination light without waste, and is bright with high efficiency.
  • An illumination device can be realized. The same applies to the behavior of the light rays L2 and L4.
  • the light beams L1 and L3 and the light beams L2 and L4 are controlled to have similar light distribution characteristics. However, by controlling the light distribution characteristics in completely different directions, illumination is performed in a wider range. It is also possible to use a lighting device.
  • the first emission surface 32Ca that is the upper emission surface is inclined at a predetermined angle, for example, about 20 degrees with respect to the second surface to which the second reflecting plate 12C is attached. Due to this inclination, most of the illumination light reaching the first exit surface 32Ca is refracted and emitted from the traveling direction further upward.
  • the inclination angle of the first emission surface 32Ca is preferably inclined from the parallel position by a predetermined angle, for example, about 1 to 30 degrees, preferably 15 to 20 degrees.
  • interval of a 2nd surface and a 3rd surface (injection surface) becomes narrow gradually as it leaves
  • the third surface is emitted from the emission surface by giving the inclination of the third surface substantially parallel to the second surface and a thickness that decreases from the light source toward the tip of the emission surface. Illumination light can be emitted at an angle along the second surface, and a wide area can be efficiently illuminated even if the width of the illumination optical system is narrow.
  • the second exit surface 33Ca which is the lower exit surface, is inclined at a predetermined angle, for example, 10 degrees, with respect to the second surface to which the second reflector 12C is attached. Due to this inclination, most of the illumination light that has reached the second exit surface 33Ca is emitted as illumination light having a light distribution center on the rear side of the upper illumination.
  • the upper illumination is required to illuminate a wide range.
  • the lower side illumination often illuminates the upper part of the object placed on the shelf below the shelf to which the illumination device is attached, and therefore often has a distance from the object to be illuminated. Therefore, by tilting the light distribution center of the lower illumination to the rear side, it becomes possible to illuminate the objects arranged to the back of the shelf board from the upper side. In other words, the object surface can be illuminated from the front and simultaneously from the top to the back, so that products placed on the shelf can be easily observed.
  • the inner surface of the second reflecting plate 12C attached to the second surface is preferably a reflecting surface having a diffusing characteristic, and for example, a metal cover whose inner surface is painted white may be used.
  • the degree of diffusion is desirably set to, for example, Gaussian scattering and a diffusion angle ⁇ of about 10 to 30 degrees. If the diffusion angle is too large, the illumination light diverges over a wide angle, which not only illuminates a useless area and lowers the illumination efficiency, but also moves toward the object observer (for example, product purchaser) and observes the object. In some cases, the illumination light may be unnecessary.
  • the second surface of the light guide 3C to which the second reflector 12C is attached is also a diffusion surface.
  • the surface can be diffused by providing fine irregularities on the surface of the light guide 3C.
  • the degree of diffusion be the same as that of the diffusion surface provided on the inner surface of the second reflecting plate 12C.
  • the diffusing portion 14 having a predetermined diffusion characteristic on the second surface side, the light diffused and reflected in a predetermined angle range is guided to the emission surface, and illumination light with reduced color unevenness and illuminance unevenness is emitted. It becomes possible to do.
  • the second surface is provided with a diffusing portion 14 that reflects the incident light while diffusing the incident light in a predetermined angle range at a portion that reflects the reflected light toward the exit surface.
  • a flat portion may be provided on the upper end surface 32Cb of the light guide 3C and covered with the extended surface of the second reflecting plate 12C. If it is such a structure, when this illuminating device 1C is used as an illuminating device for a shelf, even if illumination light is emitted upward from an illuminating device arranged below the observer's viewpoint, This is preferable because the observer is not dazzled and can be easily observed.
  • a planar portion may be provided on the lower end surface 33Cb of the light guide 3C, and the illumination light may be emitted downward.
  • the upper front surface of the object may not be illuminated with high quality only by illumination light emitted toward the rear. Therefore, as in the present embodiment, the lower stage can be illuminated with higher quality by emitting the illumination light in the direction directly below.
  • the illumination device 1C is, for example, long as shown in FIG. 4, and has a configuration in which a plurality of point light sources 2 are arranged in parallel in the longitudinal direction. Further, the cross section is substantially T-shaped, and the length is, for example, about the width of the shelf board to be mounted.
  • an LED substrate 21 having a length about the width of the shelf board is provided, and a plurality of LED light sources serving as the point light sources 2 are mounted thereon at a predetermined pitch.
  • the shelf width may be configured to be divided into a plurality of substrates and electrically connected to each other.
  • the LED light source installation interval may be set to a length of about the height of the second reflecting plate 12C (the height of the second surface of the light guide 3C).
  • the light emitted from the adjacent light sources is mixed if the distance is shorter than the optical path length from the point light source 2 to the light emitted from the exit surface. If the interval between the point light sources 2 is widened, the number of the point light sources 2 to be installed can be reduced and the cost can be reduced.
  • the length is shorter than the optical path length of the illumination light, for example, the height of the second reflector 12C as in this embodiment. It is preferable that the interval is.
  • the cross section is T-shaped, the optical path length from the light source to the exit surface is longer than the width (thickness) of the illumination unit. Therefore, even if the size of the illumination unit is set to be thin in the vertical direction, the installation interval of the point light sources 2 can be set wide, which is advantageous for cost reduction.
  • both sides of the illumination unit are covered with the side cover 15 so that illumination light is not emitted outward from the left and right end faces of the light guide 3C.
  • the inner surface of the side cover 15 is a reflecting surface, and the illumination light that has reached the side cover 15 is returned again into the light guide 3C, reflected by one of the reflecting surfaces, and then emitted as illumination light from the exit surface.
  • the illumination optical system 10C according to the present embodiment formed by the light guide 3C has a plurality of point light sources 2 arranged in parallel at a predetermined interval in the longitudinal direction of the T-section, and is long along the longitudinal direction. It has a small injection part. Therefore, it is possible to illuminate widely in the longitudinal direction of the illumination optical system with high illuminance using a plurality of point light sources 2. In addition, since it has an optical path that guides light while being repeatedly reflected, even if the arrangement pitch of a plurality of point light sources 2 arranged side by side is wide, it is possible to uniformly illuminate with reduced uneven illuminance in the longitudinal direction. Since the installation quantity of the shape light source may be small, the cost can be reduced.
  • the illumination optical system described above is asymmetric in the vertical direction. Further, only the upper side has a back reflecting surface (third reflecting plate 13C), and a long optical path from the light source to the exit surface is secured.
  • the light emitted from the illumination optical system can be efficiently guided to the illumination target by fixing the rear reflection surface to the shelf so that the rear surface of the rear reflection surface is in contact with the end surface of the shelf.
  • the illuminating device 1C which includes the point light source 2 and the light guide 3C and is attached to the tip of the shelf, controls the light distribution of the point light source 2 to be bright and efficiently uniform in a desired specific direction. It is possible to illuminate, and it becomes possible to favorably illuminate a product displayed in a showcase having a plurality of shelf boards above and below.
  • an LED light source with high luminance may be used for the LED light source that is the point light source 2, or more LED light sources may be installed.
  • 14A and 14B show a light source 40A that is an example of a light source 40 in which a plurality of LED light sources K1, which are white light sources, are densely arranged.
  • 14A is a top view of the light source 40A
  • FIG. 14B is a side view of the light source 40A.
  • the LED light source K1 includes a phosphor 42 that converts blue light 43 into yellow light 44 with a predetermined conversion efficiency on a blue LED 41 having a light emission center 41a that emits blue light 43. A part of the blue light 43 is converted into yellow light 44 and the rest is emitted from the LED light source K1, so that the blue light 43 and the yellow light 44 are mixed to form white light.
  • the phosphor 42 is formed so as to cover the entire upper part of the blue LED 41. Therefore, when the LED light sources K1 are arranged densely as shown in FIG. 14A, the phosphor 42 portions appear to be arranged continuously even though the light emission centers 41a of the blue LEDs 41 are arranged discretely. Since white light is emitted from the phosphor 42 portion, it looks as if it is a light source having a light emitting surface extending in the direction in which the LED light sources K1 are arranged (X direction in the figure).
  • such a light source is a linear light source or a linearly long surface light source (XY plane). Therefore, in the present invention, it can be said that a light source having a light emitting surface extending in a direction perpendicular to the T-shaped cross section may be used instead of the row of the point light sources 2.
  • the length in the direction (Y direction in the drawing) between the two reflecting surfaces forming the first reflecting portion 11A (see FIG. 1) is preferably as small as possible. In the case of a point light source, it goes without saying that the smaller the length in the direction between the two reflecting surfaces, the better.
  • the point light source here refers to a light source in which, for example, the vertical and horizontal sizes of the light emitting surface for emitting light in the horizontal direction are sufficiently small compared to the size of the illumination optical system.
  • it refers to a light source in which the length of a point light source in the direction is sufficiently small (for example, one third) with respect to the length in the direction between two reflecting surfaces forming the first reflecting portion 11A. With this size, the specific direction can be efficiently illuminated.
  • FIGS. 15A and 15B there is a light source 40B shown in FIGS. 15A and 15B, for example.
  • 15A is a top view of the light source 40B
  • FIG. 15B is a side view of the light source 40B.
  • the light source 40 ⁇ / b> B includes a substrate 21, a plurality of blue LEDs 41 mounted on the substrate 21, and a phosphor 42 that covers the plurality of blue LEDs 41.
  • a wiring pattern for supplying power to the blue LED 41 is formed on the substrate 21, one electrode of the blue LED 41 is in contact with the wiring pattern, and the other electrode is wire bonded from the wiring pattern. Has been.
  • Blue LED 41 is supplied with electric power and emits blue light 43 from the light emitting surface. As the blue light 43 travels through the phosphor 42, it is converted into yellow light 44 with a conversion efficiency in accordance with the characteristics of the phosphor 42. The light emitted from the phosphor 42 becomes white light by appropriately mixing the blue light 43 and the yellow light 44, and the light source 40B emits white light.
  • FIG. 16 shows an example of an illuminating device 1C provided with such a light source 40 (40A, 40B) and a light guide 3C.
  • a light source 40 40A, 40B
  • a thin-line cold cathode tube 40A, 40B
  • FIG. 17 shows a modification of the illuminating device 1C provided with such a light source 50 in FIG.
  • the illuminating device 1C shown in FIG. 17 has a light source 50 made of a cold cathode tube mounted on a light guide 3C.
  • FIG. 5 shows an illuminating device 1D according to a fourth embodiment in which the light splitting portion 16 having a V-shaped cross section is provided on the second surface of the light guide and the second reflecting plate. That is, this is an example in which the light guide 3D including the light beam branching portion 16 forms the illumination optical system 10D. Since the configuration other than the light beam branching portion 16 is the same as that of the lighting device 1C described above, it will not be described in detail.
  • the light beam branching portion 16 has a substantially V-shaped cross section in which the first branch surface 16a and the second branch surface 16b intersect at a predetermined angle, and the light reflected by the first branch surface 16a is passed through the first light guide portion 32D.
  • the light guided to the first exit surface 32Da and reflected by the second branch surface 16b is guided to the second exit surface 33Da via the second light guide 33D.
  • a light guide 3D having a V-shaped concave portion on the second surface is used, and a second reflecting plate 12D having a V-shaped convex portion that matches the concave portion is used. It has a configuration that was.
  • the light path length from when the light emitted from the light source substantially in the front direction reciprocates between the opposing second reflector and the light source member and is emitted from the emission section. Increases the temperature of the lighting device. Further, there is a high possibility that the light is emitted in an unnecessary direction, and the light use efficiency is also reduced.
  • the light is emitted from the point light source 2, is incident from the second incident surface 31Db, is reflected by the first lower reflecting plate 11Db, reaches the second surface, and is reflected by the second reflecting plate 12D outside the second surface.
  • the light beam L1a is repeatedly reflected from the third reflecting plate 13D, guided to the first exit surface 32Da, refracted and emitted from the point light source 2, and is incident from the first incident surface 31Da.
  • the second surface as it is and reflected by the second reflecting plate 12D outside the second surface it is repeatedly reflected from the third reflecting plate 13D and guided to the first exit surface 32Da and refracted.
  • the emitted light beam L1b After reaching the second surface as it is and reflected by the second reflecting plate 12D outside the second surface, it is repeatedly reflected from the third reflecting plate 13D and guided to the first exit surface 32Da and refracted.
  • the emitted light beam L1b Further, light rays L2a and L2b whose light distribution is controlled in
  • the reflecting surface other than the light beam branching portion 16 is a diffusing surface in the same manner as the lighting device 1C described above.
  • a roughened diffusing portion 14 is provided in a portion close to the exit surface.
  • the luminous flux branching portion 16 is used as a mirror surface, and all the light is favorably reflected and guided until reaching the diffusing portion 14, thereby enabling more efficient light distribution control of the illumination light. .
  • FIG. 6 shows an illumination device 1E according to the fifth embodiment.
  • This illuminating device 1E is an example in which both the upper side and the lower side of the bending point 17 facing the point light source 2 of the reflecting surface arranged facing the point light source 2 are inclined outward. It is the structure provided with the 2nd reflecting plate 12E which forms the light guide 3E in which the 2nd surface was bent, and the reflective surface which bent. Further, this bending point 17 becomes a light beam branching portion.
  • this reflection surface that is, the second reflection plate 12F (second reflection portion) is an inclined surface that reflects incident light while diffusing it in a predetermined angle range.
  • the light distribution control angle can be expanded by inclining the second reflecting portion, so that an illumination device capable of efficiently illuminating a necessary region can be realized.
  • the first upper reflecting plate 11Ea and the first lower reflecting plate 11Eb in the vicinity of the light source, and the incident portion 31E of the light guide 3E are inclined so that the distance increases as the distance from the light source increases. Thereby, out of the light emitted from the light source, the light beam emitted in the normal direction with high emission intensity can be efficiently guided to the optical path branched in the vertical direction.
  • the light is emitted from the point light source 2, is incident from the second incident surface 31Eb, is reflected by the first lower reflecting plate 11Eb, reaches the second surface, and is reflected by the second reflecting plate 12E outside the second surface. Thereafter, the light beam L1a is repeatedly reflected from the third reflecting plate 13E, guided to the first exit surface 32Ea, refracted upward, and emitted from the point light source 2, and the first entrance surface 31Ea. From the second reflection plate 12E outside the second surface, and then repeatedly reflected between the third reflection plate 13E and led to the first exit surface 32Ea, And a light beam L1b that is refracted and emitted downward. Further, light rays L2a and L2b whose light distribution is controlled in a predetermined direction are emitted from the lower side.
  • the reflecting portion is provided with an inclined reflecting surface that is widened as the distance from the light source increases, the light reflected by the inclined reflecting surface is controlled in a direction in which the reflection angle decreases, From the upper and lower emission surfaces, the illumination light is controlled so as to irradiate more rearward in the horizontal direction. Thereby, each of upper side illumination and lower side illumination can illuminate a wider range.
  • the above-described light guide 3 (3C, 3D, 3E) has been described as a T-shaped light guide having a cross section having an incident portion, a first light guide, and a second light guide.
  • a plate-shaped light guide may be provided in the illumination optical system, and such a configuration example will be described with reference to FIGS.
  • FIG. 7 shows a lighting device 1F of the sixth embodiment.
  • This illuminating device 1F is an example in which a plate-shaped light guide 3F is disposed in a T-shaped illumination optical system, and a first surface on which light emitted from the point light source 2 is incident becomes an incident surface 3Fa.
  • the upper side of the plate shape is the first light guide portion 32F and the lower side is the second light guide portion 33F.
  • the light emitted from the point light source 2 located away from the incident surface 3Fa is reflected by the first lower reflecting plate 11Fb, and then reflected by the second reflecting plate 12F and the third reflecting plate 13F of the first light guide portion 32F.
  • the light beams L2a and L2c that are reflected by the first upper reflection plate 11Fa and then reflected and emitted by the second reflection plate 12F of the first light guide portion 32F are directly emitted. It includes a light beam L2b that is emitted toward the second reflecting plate 12F, reflected by the second reflecting plate 12F, and emitted.
  • the installation position of the point light source 2, the first vertical reflector, the second and third reflectors constituting the T-shaped illumination optical system, and Illumination light having desired light distribution characteristics can be realized by the inclination angle of the exit surface.
  • the lighting device 1F described above uses the plate-shaped light guide 3F, the light guide has a simple light guide structure, and the cost can be reduced while controlling the light distribution of the illumination light.
  • FIG. 8 shows a lighting device 1G of the seventh embodiment.
  • This illuminating device 1G is an example in which a plate-shaped light guide 3G is disposed in a T-section illumination optical system.
  • the light guide 3G is an example in which the first incident surface 31Ga and the second incident surface 31Gb which are light beam branching portions are provided on the incident surface of the sixth embodiment described above, and the light emitted from the point light source 2 Is efficiently branched into upper and lower light guides.
  • the light guide 3G includes a first incident surface 31Ga intersecting a V-shaped cross section, an incident surface 3Ga formed with a second incident surface 31Gb, a plate-shaped first light guide portion 32G, and a second light guide portion. 33G. Then, the light is emitted from the point light source 2 from the upper first emission portion 32Ga, reflected by the first lower reflection plate 11Gb, and repeatedly reflected by the second reflection plate 12G and the third reflection plate 13G of the first light guide portion 32G.
  • the light L1a emitted and the light L1b incident from the first incident surface 31Ga and repeatedly reflected by the second reflecting plate 12G and the third reflecting plate 13G to be emitted are controlled at a predetermined angle. Light is emitted.
  • the light is emitted from the point light source 2, reflected by the first upper reflection plate 11Ga, and reflected and emitted by the second reflection plate 12G of the first light guide portion 32G.
  • Illumination light whose light distribution is controlled at a predetermined angle, such as the light beam L2a and the light beam L2b incident from the second incident surface 31Gb and reflected by the second reflecting plate 12G, is emitted.
  • the above-described diffusion portion 14 is provided on the reflection surface of the second reflecting plate 12G and the reflection surface of the light guide 3G, and the diffusion portion 14 diffuses and reflects within a predetermined angle range. It is possible to realize illumination light with improved color unevenness and illuminance unevenness by guiding the emitted light to the exit surface and refracting the exit surface at a predetermined angle.
  • the lighting device 1G described above also uses the plate-shaped light guide 3G, it has a simple light guide structure and can realize an inexpensive and highly efficient lighting device.
  • a light beam branching portion can be provided and can be branched in two different directions. Eighth and ninth embodiments provided with this light beam branching section will be described with reference to FIGS.
  • the illuminating device 1H of the eighth embodiment shown in FIG. 9 has an illuminating optical system composed of only a reflecting surface without using a light guide. Further, a light beam branching portion 16 is formed on the second reflecting plate 12H.
  • the light that has reached the first branch surface 16a is guided to the upper first light guide portion 1Hb, and the light that has reached the second branch surface 16b is the lower side. Is guided to the second light guide portion 1Hc.
  • the light is emitted from the point light source 2 and reaches the first branch surface 16a as it is, is reflected toward the third reflecting plate 13H, and is emitted from the light source L1a emitted from the emission unit 1Hd or the point light source 2. Then, the light reaches the first branching surface 16a as it is, and is further reflected as it is toward the emitting portion 1Hd and is emitted by the light beam L1b, the first upper reflecting plate 11Ha, and the first lower reflecting plate 11Hb to be reflected to the second reflecting plate.
  • the light beam L1c is emitted from the emitting portion 1Hd, and the light beam L1d is repeatedly reflected and emitted between the second reflecting plate 12H and the third reflecting plate 13H. Further, light rays L2a, L2b, L2c, L2d and the like whose light distribution is controlled so as to diffuse into a predetermined range are emitted from the lower emission portion 1He.
  • the above-described diffusing portion 14 is provided on the reflecting surface of the second reflecting plate 12H, and light diffused and reflected by the diffusing portion 14 in a predetermined angle range from the emitting surface by a predetermined angle. By diffusing and emitting in the range, it is possible to realize illumination light with improved illuminance unevenness.
  • the second reflecting portion (second reflecting plate 12H) is provided with a diffusing portion that reflects the incident light while diffusing the incident light in a predetermined angle range at a portion that reflects the reflected light toward the emitting portion.
  • a diffusing portion that reflects the incident light while diffusing the incident light in a predetermined angle range at a portion that reflects the reflected light toward the emitting portion.
  • the light distribution angle of the illumination light emitted from the emission part can be controlled by inclining the first upper reflector 11Ha and the first lower reflector 11Hb.
  • the light distribution angle of the illumination light emitted from the emission unit can be controlled to be smaller than when arranged in parallel. it can.
  • a light guide may be provided in the optical path of the illumination device 1H.
  • the illumination device 1K according to the ninth embodiment is provided with a flat light guide 3K.
  • first emission surface 32Ka, second emission surface 33Ka are inclined at a predetermined angle (for example, 50 degrees) with respect to the second reflecting plate 12K so that the emitted illumination light approaches the light source. Can be refracted.
  • the exit surface (third surface) is inclined by 50 to 80 degrees from the parallel position with respect to the second surface (reflecting surface: second reflecting plate 12K), and the second surface and the third surface as the distance from the light source increases.
  • the light is emitted from the point light source 2, reflected by the first upper reflecting plate 11Ka and the first lower reflecting plate 11Kb, reaches the first branch surface 16a, is reflected toward the third upper reflecting plate 13Ka, and further After returning to the second surface and being reflected by the second reflecting plate 12K outside the second surface, the light beam L1a emitted from the second emission surface 32Ka or the point light source 2 and emitted as it is to the first branch surface 16a. , And a light beam L1b that is repeatedly reflected and emitted between the third upper reflecting plate 13Ka and the second reflecting plate 12K. Further, light rays L2a, L2b and the like whose light distribution is controlled so as to be refracted at a predetermined angle and emitted from the lower second emission surface 33Ka are emitted.
  • the light distribution angle of the emitted illumination light can be controlled by inclining the first upper reflector 11Ka and the first lower reflector 11Kb. For example, if the distance between each other is increased as the distance from the light source is increased, the light distribution angle of the illumination light emitted from the emission unit can be controlled to be larger than when arranged in parallel. it can.
  • the lighting device 1K By mounting and using the lighting device 1K having the above-described configuration on a plate-like body, for example, the tip of a shelf board, it is possible to realize an illumination apparatus that effectively illuminates the vicinity of a desired portion of an object placed on the shelf board. .
  • an illumination device effective for illuminating the tip end region of the shelf board can be realized.
  • the lighting device 1K can be used by being mounted on a plate-like body other than the shelf board.
  • the both side regions of the partition wall can be effectively used. Can be illuminated. Therefore, an embodiment in which the lighting device 1K is mounted on the upper part of the partition wall will be described with reference to FIGS. 11A and 11B.
  • the lighting device 1K is used by being mounted on the upper part of the partition wall 5A. Moreover, it is set as the structure which accommodates LED board 21 carrying the 1st upper reflecting plate 11Ka, the 1st lower reflecting plate 11Kb, and the point light source 2 in the accommodation recessed part 5Aa formed in the upper part of the partition wall 5A. That is, the projection of the lighting device 1K is fitted and held.
  • the width of the lighting device 1K is approximately the same as the thickness of the partition wall 5A, and the illumination light is emitted obliquely downward from the inclined emission surfaces on both sides of the light guide 3K.
  • light beams L3a and L3b whose light distribution is controlled in advance so as to be emitted toward the predetermined region are emitted on the left side of the partition wall 5A, and the predetermined region on the right side in advance.
  • Light rays L4a and L4b whose light distribution is controlled so as to be emitted toward the light source are emitted.
  • the emission direction of the illumination light can be defined in advance by the configuration of the illumination optical system, so that it is possible to realize a highly efficient illumination device by suppressing unnecessary light without emitting in an unnecessary direction.
  • the point light sources 2 are arranged in a direction perpendicular to the paper surface at intervals wider than the thickness of the partition wall 5A. As described above, it is possible to effectively and efficiently illuminate the predetermined regions on both sides of the plate-like body (partition wall 5A) using the lighting device 1K according to the present embodiment.
  • FIG. 12A shows a state in which the lighting device 1C is attached to the tip of the shelf board 5B, and illumination light whose light distribution is controlled at a predetermined angle is emitted to both the upper side and the lower side of the shelf board 5B.
  • 1C of illuminating devices are attached to the front-end
  • FIG. Further, the front of the product M1 placed on the shelf board 5B is supported by a guard body 8 having an upper guard rod 8a and a lower guard rod 8b fixed to the support member 7 to prevent the product M1 from falling. is doing.
  • the light emitted from the point light source 2 is guided through the light guide 3C while being reflected by the second reflecting plate 12C and the third reflecting plate 13C of the light guide 3C, and is specified from the upper exit surface. It includes light rays L1a, L1b, and L1c whose light distribution is controlled in the direction. Further, light rays L2a, L2b, L2c, L2d and the like whose light distribution is controlled in a specific direction are emitted from the lower emission surface. At this time, it is good also as a structure which reflects a part of light (for example, light ray L2b) via the reflective surface 6a.
  • the guard body 8 may be a plate-shaped guard plate made of a transparent resin plate. However, if the guard plate is used, the guard plate is disposed between the lighting device and the product, so that the illumination light is transmitted to the guard plate. The amount of light that is reflected on the surface of the product and illuminates the product is reduced. In addition, if the reflected light enters the eyes of the observer, it becomes dazzling and obstructs the observation of the product.
  • the product M1 can be efficiently illuminated without the illumination light being blocked by the guard bar.
  • the guard rod is preferably made of a material having a low reflectance and a large diffusion property. This is because if the reflectance of the guard rod is high, the illumination light is reflected and obstructs the observation of the product M1.
  • the cross-sectional shape of the guard rod is preferably circular, and if it is circular, the illumination light diffused and reflected by the guard rod can be spread over a wider range and controlled so as not to hinder product observation.
  • the shadow contrast of the guard rod projected on the product surface can be lowered, and higher-quality illumination can be realized. it can.
  • the lower guard bar 8b is disposed in the vicinity of the tip of the shelf board 5B in order to regulate the position of the product M1, and the upper guard bar 8a is disposed in front of the lower guard bar 8b as long as the product M1 does not fall even if tilted. Thus, a certain interval can be secured from the product M1 whose position is regulated by the lower guard rod 8b.
  • the illumination device according to the present embodiment that can illuminate two different directions can be suitably used for a showcase including a plurality of shelves.
  • the lighting device 1C1 is mounted on the upper shelf plate 5C, and the lighting device 1C2 is mounted on the lower shelf plate 5D.
  • the front surface of the product M1a placed on the shelf board 5C is illuminated by the light beam L11a emitted from the lighting device 1C1 attached to the upper shelf board 5C, and the light beam L21a emitted downward is used to illuminate the shelf board.
  • the upper part of the product M2a placed on 5D is illuminated.
  • the front of the product M2a placed on the shelf board 5D is illuminated by the light beam L12a emitted from the lighting device 1C2 mounted on the lower shelf board 5D, and the lower shelf is illuminated by the light beam L22a emitted downward. Illuminate the top of another product placed on the board.
  • the upper and lower sides of the shelf can be illuminated at the same time using a single light source, so even a showcase displaying tall products on multiple shelf plates It is preferable because the upper part is effectively illuminated to facilitate observation.
  • point light source 2 Although it was set as the embodiment using the chip-type LED light source as the point light source 2, other point light sources may be used, for example, a lens-mounted or bullet-type LED light source may be used.
  • the incident light is incident from the incident part and reflected at least once by the first reflecting part.
  • the illumination light can be constituted by a light beam having two types of optical paths, and a highly efficient illumination device having desired directivity characteristics and light distribution characteristics can be realized. For example, by superimposing the directivity characteristics of two light beams, it is possible to realize an illuminating device that can efficiently illuminate only a necessary region even when a point light source having a large divergence angle is used.
  • the illumination device according to the present invention by using the illumination device according to the present invention, a compact illumination device that can efficiently illuminate a specific direction on both sides of the plate-like body can be realized. Therefore, even if it is a compact structure, the illuminating device which has a desired light distribution characteristic and can perform highly efficient illumination can be obtained.
  • the illumination light can be controlled by refraction on each surface of the light guide, so that a higher performance and higher efficiency illumination device can be realized.
  • the illuminating device according to the present invention can be suitably applied to an illuminating device for illuminating a tall product placed on a multistage showcase having a plurality of shelf boards on the upper and lower sides.
  • 1A-1K Illumination device 2 Point light source (light source, LED light source) 3C to 3G Light guide 5A Partition wall 5B Shelf 10A to 10D Illumination optical system 11, 11A to 11H Incident surface 12 Reflecting surface 12Aa to 12Ha First reflecting surface 12Ab to 12Hb Second reflecting surface 13 Ejecting surface 14 Diffusing portion L1, L1a to L1d rays L2, L2a to L2d rays

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Freezers Or Refrigerated Showcases (AREA)

Abstract

L'invention porte sur un dispositif d'éclairage (1A-1K), lequel dispositif est apte à présenter des caractéristiques de distribution de lumière prévues et un éclairage hautement efficace malgré l'utilisation d'une configuration compacte, et lequel dispositif d'éclairage comprend une source de lumière (une source de lumière ponctuelle (2)) et un système optique d'éclairage ayant une section transversale en forme de T, et éclaire simultanément de la lumière dans deux directions différentes, ledit système optique d'éclairage comprenant une partie d'entrée où entre la lumière émise à partir de la source de lumière ponctuelle, des première et seconde trajectoires de lumière pour guider la lumière incidente sur la partie d'entrée dans deux directions différentes d'une manière divisée, et des première et seconde parties de sortie pour émettre la lumière qui a été guidée de la manière divisée. Le dispositif d'éclairage est configuré de telle sorte qu'une lumière d'éclairage comprenant une combinaison d'une première lumière, qui est réfléchie à partir d'une première section réfléchissante et d'une seconde section réfléchissante, et d'une seconde lumière, qui est réfléchie à partir de la seconde section réfléchissante sans mettre en œuvre la première section réfléchissante, est émise à partir de chacune des première et seconde parties de sortie.
PCT/JP2012/050893 2011-02-04 2012-01-18 Dispositif d'éclairage WO2012105314A1 (fr)

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JP2012161474A (ja) * 2011-02-07 2012-08-30 Fukushima Industries Corp ショーケースの照明装置およびショーケース
US20140153256A1 (en) * 2011-04-08 2014-06-05 3M Innovation Properties Company Light duct tee extractor
FR3005138A1 (fr) * 2013-04-30 2014-10-31 Automotive Lighting Rear Lamps France Dispositif d'eclairage a led avec systeme diffuseur et effet 3d
WO2016073878A1 (fr) * 2014-11-07 2016-05-12 Quarkstar Llc Luminaire à source de lumière empilée
CN105765291A (zh) * 2013-09-17 2016-07-13 夸克星有限责任公司 用于直接-间接照明的光导照明装置
JP2016170883A (ja) * 2015-03-11 2016-09-23 三菱電機株式会社 面光源装置および液晶表示装置
US9846272B2 (en) 2012-09-13 2017-12-19 Quarkstar Llc Illumination systems providing direct and indirect illumination
EP3339727A1 (fr) * 2016-12-22 2018-06-27 Self Electronics Co., Ltd. Bande lumineuse pour étagère
US10288798B2 (en) 2013-07-18 2019-05-14 Quarkstar Llc Illumination device in which source light injection is non-parallel to device's optical axis
US10520663B2 (en) 2013-02-08 2019-12-31 Quarkstar Llc Illumination system based on active and passive illumination devices
US10823905B2 (en) 2011-08-08 2020-11-03 Quarkstar Llc Illumination devices including multiple light emitting elements

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WO2015095112A1 (fr) * 2013-12-19 2015-06-25 3M Innovative Properties Company Système de distribution modulaire
CN107965704B (zh) * 2017-12-20 2023-09-29 欧普照明股份有限公司 照明装置及照明系统

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Cited By (25)

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Publication number Priority date Publication date Assignee Title
JP2012161474A (ja) * 2011-02-07 2012-08-30 Fukushima Industries Corp ショーケースの照明装置およびショーケース
US20140153256A1 (en) * 2011-04-08 2014-06-05 3M Innovation Properties Company Light duct tee extractor
US9353930B2 (en) * 2011-04-08 2016-05-31 3M Innovative Properties Company Light duct tee extractor
US10823905B2 (en) 2011-08-08 2020-11-03 Quarkstar Llc Illumination devices including multiple light emitting elements
US10859758B2 (en) 2011-08-08 2020-12-08 Quarkstar Llc Illumination devices including multiple light emitting elements
US11703631B2 (en) 2011-08-08 2023-07-18 Quarkstar Llc Illumination devices including multiple light emitting elements
US9846272B2 (en) 2012-09-13 2017-12-19 Quarkstar Llc Illumination systems providing direct and indirect illumination
US10520663B2 (en) 2013-02-08 2019-12-31 Quarkstar Llc Illumination system based on active and passive illumination devices
FR3005138A1 (fr) * 2013-04-30 2014-10-31 Automotive Lighting Rear Lamps France Dispositif d'eclairage a led avec systeme diffuseur et effet 3d
WO2014177816A1 (fr) * 2013-04-30 2014-11-06 Automotive Lighting Rear Lamps France Dispositif d'éclairage à led avec système diffuseur et effet 3d
US10288798B2 (en) 2013-07-18 2019-05-14 Quarkstar Llc Illumination device in which source light injection is non-parallel to device's optical axis
US10094969B2 (en) 2013-09-17 2018-10-09 Quarkstar Llc Illumination device for direct-indirect illumination
US11150400B2 (en) 2013-09-17 2021-10-19 Quarkstar Llc Illumination device for direct-indirect illumination
US11693174B2 (en) 2013-09-17 2023-07-04 Quarkstar Llc Illumination device for direct-indirect illumination
US9891371B2 (en) 2013-09-17 2018-02-13 Quarkstar Llc Light guide illumination device for direct-indirect illumination
CN105765291B (zh) * 2013-09-17 2019-09-06 夸克星有限责任公司 用于直接-间接照明的光导照明装置
US10495807B2 (en) 2013-09-17 2019-12-03 Quarkstar Llc Light guide illumination device for direct-indirect illumination
CN105765291A (zh) * 2013-09-17 2016-07-13 夸克星有限责任公司 用于直接-间接照明的光导照明装置
US9664839B2 (en) 2013-09-17 2017-05-30 Quarkstar Llc Illumination device for direct-indirect illumination
US9557030B2 (en) 2013-09-17 2017-01-31 Quarkstar Llc Light guide illumination device for direct-indirect illumination
US10545276B2 (en) 2014-11-07 2020-01-28 Quarkstar Llc Stack lighter luminaire
US10551547B2 (en) 2014-11-07 2020-02-04 Quarkstar Llc Troffer luminaire
WO2016073878A1 (fr) * 2014-11-07 2016-05-12 Quarkstar Llc Luminaire à source de lumière empilée
JP2016170883A (ja) * 2015-03-11 2016-09-23 三菱電機株式会社 面光源装置および液晶表示装置
EP3339727A1 (fr) * 2016-12-22 2018-06-27 Self Electronics Co., Ltd. Bande lumineuse pour étagère

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CN103348183A (zh) 2013-10-09

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