CN103348183A - Illuminating device - Google Patents
Illuminating device Download PDFInfo
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- CN103348183A CN103348183A CN2012800072314A CN201280007231A CN103348183A CN 103348183 A CN103348183 A CN 103348183A CN 2012800072314 A CN2012800072314 A CN 2012800072314A CN 201280007231 A CN201280007231 A CN 201280007231A CN 103348183 A CN103348183 A CN 103348183A
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Images
Classifications
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
- Freezers Or Refrigerated Showcases (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
In order to obtain an illuminating device (1A-1K) that is capable of exhibiting intended light distribution characteristics and highly efficient illumination in spite of the use of a compact configuration, this illuminating device comprises a light source (a point light source (2)) and an illuminating optical system having a T-shaped cross section, and illuminates light in two different directions simultaneously, said illuminating optical system comprising an entrance part where light emitted from the point light source enters, first and second light paths for guiding the light incident on the entrance part in two different directions in a divided manner, and first and second exit parts for emitting the light that has been guided in the divided manner. The illuminating device is configured such that illuminating light comprising a combination of first light, which is reflected off a first reflecting section and a second reflecting section, and second light, which is reflected off the second reflecting section without involving the first reflecting section, is emitted from each of the first and second exit parts.
Description
Technical field
The present invention relates to lighting device, for example relate to and be equipped on showcase etc. and be applicable to the lighting device that the commodity that display in the showcase are thrown light on.
Background technology
In the past, utilize fluorescent lamp to be used as being equipped on showcase widely and device that the commodity that display in the showcase are thrown light on.But fluorescent lamp generally becomes optic radiation, infrared radioactive ray, ultraviolet radioactive ray with transformation of electrical energy, comes as illumination by the radiation visible rays.At this moment owing to can produce heat loss, so exist except fluorescent lamp from body, the commodity that are exhibited also can be subjected to the photothermal influence that this fluorescent lamp produces and be heated this problem, the light source of the lighting device of using as showcase might not be preferred.
In recent years, utilized luminous efficiency height, luminous quantity increase and life-span to grow, consumed the LED(Light Emitting Diode that electric power is little, environmental pollution is little: lighting device light emitting diode) is practical day by day.In addition, since developing the blue led chip, thereby with this blue led chip with made up to send the White LED light source of white light by the fluorophor that the exciting light of provision wavelengths is sent in the light stimulus that this led chip sends; The led light source that utilizes this trichromatic led chip of blue led chip, green LED chip and red LED chips to synthesize white light just is developed.
Therefore, as lighting device, utilizing the LED lighting device that has set this White LED light source.Especially as the lighting device of display such as showcase shelf, utilize just gropingly and consume the also little led light source of the little heating of electric power, for example proposed a kind of showcase (for example with reference to patent documentation 1) that the LED that throws light in the showroom is thrown light on from the top that is provided with.
In addition, proposed a kind ofly in the price tag (Price rail) of front end that is arranged at the display shelf, to set led light source, come the showcase that shines up and down (for example with reference to patent documentation 2) to shelf by the reflecting plate in the side setting of the front of light source.
Patent documentation 1: TOHKEMY 2008-206665 communique
Patent documentation 2: TOHKEMY 2010-78251 communique
Yet, as patent documentation 1 described showcase from the top of shelf towards the method for throwing light in the bottom, the horizontal illumination value of shelf is big but the vertical illuminance value is little, the result, and the front of the commodity of likeing when the consumer carries out commodity selection becomes darker.In addition, be subjected to produce shadow from the influence of the illumination of top, exist to be difficult to see clearly the problem of wanting the commodity packaging seen.
In addition, in the formation of as patent documentation 2 described showcases, utilizing a led light source that shelf is thrown light on up and down simultaneously, owing to can throw light on efficiently with less quantity of light source, so can in the illumination of guaranteeing to a certain degree, suppress the components number of light source, can realize cost cutting.But, carry out the illumination of commodity owing to be used to the reverberation of reflecting plate of the front side setting of comfortable shelf, so just change commodity being thrown light on towards coming of the light that penetrates from light source, can't carry out directive property control, the distribution controls of illumination light energetically.
Therefore, when the commodity display of head height such as milk box or beverage bottle is to the shelf, be all to be difficult to shine from the illumination light of upside or from the illumination light of downside print the commodity middle part that gorgeous trade mark or mark are arranged, have the vision that attracts the consumer and the little possibility of effect of arousing desire to purchase.
In addition, if in order to make reflecting plate become big on a large scale to throwing light on, then exist the lighting device unit to become big or thickness thickening and make the problem of degraded appearance.
Summary of the invention
The present invention In view of the foregoing finishes, and its purpose is, even if provide a kind of compact formation also to have the lighting device that desirable light distribution characteristic also can carry out high efficiency illumination.
To achieve these goals, the invention is characterized in that lighting device has light source and the cross section is the lamp optical system of T type, and different both directions is thrown light on simultaneously, described lamp optical system possesses: for the incident section of the light incident of penetrating from this light source; Become different both directions to carry out first optical path and second optical path of leaded light the optical branch that incides this incident section; And with branch and by first injection part and second injection part of the ejaculation of the light of leaded light, described lamp optical system possess with described incident section approach configuration first reflecting part and with second reflecting part of this incident section arranged opposite, penetrating respectively from described first injection part and second injection part will be by the illumination light after first light of described first reflecting part and the reflection of described second reflecting part and second light compositing that is not reflected by described second reflecting part via described first reflecting part.
According to above-mentioned formation, by utilizing the cross section to be the lamp optical system of T type shape, can utilize have from incident section incident and reflected at least by first reflecting part after 1 time reflected at least once by second reflecting part and the light beam of lead first injection part and second injection part and from incident section incident not by the reflection of first reflecting part and by the reflection of second reflecting part and the light beam of these two kinds of light paths of light beam of lead first injection part and second injection part constitutes illumination light, can realize having the high efficiency lighting device of desirable directional property, light distribution characteristic.For example, by making the directional property stack of two light beams, even utilize the big light source of the angle of divergence, also can realize the lighting device that is only thrown light on efficiently in the zone of necessity.Therefore, even can access the formation of compact (compact), the lighting device that also has desirable light distribution characteristic and can throw light on expeditiously.
In addition, the invention is characterized in, in the lighting device of above-mentioned formation, described lamp optical system possesses and opposed the 3rd reflecting part of described second reflecting part, the 3rd reflecting part receives light also again towards described second reflecting part reflection from described second reflecting part, penetrates from described injection part then.According to this formation, can further increase optical path length, can injection part be set in the position of being thrown light in desirable position.Therefore, can realize the lighting device that can only throw light on efficiently to the zone of necessity.
In addition, the invention is characterized in, in the lighting device of above-mentioned formation, be provided with the light beam branching portion, described light beam branching portion will become the light towards described first injection part and second injection part from the optical branch that described light source penetrates.Constitute according to this, can be branched off into efficiently from the illumination light that light source penetrates to having towards roughly first injection part of rightabout light path and the illumination light of second injection part ejaculation.
In addition, the invention is characterized in, in the lighting device of above-mentioned formation, described light beam branching portion be configured in described second reflecting part with the opposed position of described light source, constituted by the protruding reflecting surface of approximate V-type.According to this formation, by make from light source penetrate and from incident section incident, not by first reflecting part or the reflection of the 3rd reflecting part but the light that directly arrives second reflecting part at the protruding reflecting surface of V-type to the first injection part side and the second injection part lateral reflection, can throw light on to specific direction efficiently.
In addition, the invention is characterized in, in the lighting device of above-mentioned formation, described lamp optical system possesses light conductor, and this light conductor has the plane of incidence of the light incident of penetrating from described light source, along second of described second reflecting part and become the 3rd of described injection part.According to this formation, because by in light path, setting light conductor, can utilize the refraction in each face of light conductor to control illumination light, so can realize high efficiency lighting device with high-performance more.
In addition, the invention is characterized in, in the lighting device of above-mentioned formation, form the light beam branching portion at the plane of refraction that approximate V-type cross section is set with the opposed position of described light source of the described plane of incidence.Constitute according to this, owing to directly receive the illumination light of light source ejaculation and be branched off into different both directions, so can carry out leaded light efficiently to each injection part.
In addition, the invention is characterized in, in the lighting device of above-mentioned formation, described the 3rd with respect to described second from parallel position 1～30 degree that tilts, the interval between second and the 3rd is along with narrowing down gradually away from light source.According to this formation, by the inclination that makes the 3rd have with second almost parallel and along with from light source towards the outgoing plane front end and thickness reduces such inclination, can penetrate the illumination light that penetrates from outgoing plane with the angle along second, also can be to throwing light on efficiently on a large scale even the width of lamp optical system is narrow.
In addition, the invention is characterized in, in the lighting device of above-mentioned formation, described the 3rd with respect to described second from parallel position 50～80 degree that tilt, the interval between second and the 3rd is along with narrowing down away from light source.Constitute according to this, by the 3rd inclination being set for the angle approaching with second vertical direction, can make from the illumination light pair vertical direction that approaches with second of outgoing plane ejaculation and throw light on expeditiously.
In addition, the invention is characterized in that in the lighting device of above-mentioned formation, described second reflecting part is provided with the light that makes incident and spreads the diffusion part of reflection on one side in the predetermined angular scope on one side at the position towards described injection part reflective light.Constitute according to this, owing to penetrated from outgoing plane by the light of second reflecting part after the diffusion of predetermined angular scope, so can penetrate the illumination light of having improved uneven illumination, irregular colour.In addition owing to be provided with diffusion part at the position that approaches with injection part, so illumination light can be led efficiently penetrate near.
In addition, the invention is characterized in that in the lighting device of above-mentioned formation, described second light that is provided with incident at the position towards described outgoing plane reflective light spreads the diffusion part of reflection on one side in the predetermined angular scope on one side.Constitute according to this, possess the lamp optical system that is provided with the light conductor of diffusion part at reflecting surface even utilize, owing to also penetrated from outgoing plane at the light of predetermined angular scope diffusion, so can penetrate the illumination light of having improved uneven illumination, irregular colour.
In addition, the invention is characterized in that in the lighting device of above-mentioned formation, described second reflecting part becomes the light that makes incident and spreads the inclined plane of reflection on one side in the predetermined angular scope on one side.According to this formation, owing to by second reflecting part is tilted, can enlarge the distribution controls angle, so can realize the lighting device that thrown light on efficiently in the zone of necessity.
In addition, the invention is characterized in that in the lighting device of above-mentioned formation, described lamp optical system is that the long side direction of T type is set up in parallel a plurality of described light sources, the injection part that has long size along this long side direction with predetermined distance in the cross section.Constitute according to this, can utilize a plurality of light sources to carry out wide in range illumination with high illumination to the long side direction of lamp optical system.In addition, owing to have the optical path that interreflection on one side carries out leaded light on one side, thus wide even be set up in parallel a plurality of configured light sources spacings, also can reduce the uneven illumination of long side direction, thereby throw light on, reduce the quantity that arranges of light source equably, therefore can reduce cost.
In addition, the invention is characterized in that in the lighting device of above-mentioned formation, described light source is point source of light.Here said point source of light refers to compare with the size of lamp optical system, for example the equal abundant little light source of the size up and down of the light-emitting area that light is penetrated to horizontal direction.By adopting this size, can throw light on efficiently to specific direction.
In addition, the invention is characterized in that in the lighting device of above-mentioned formation, described point source of light is made of led light source.Constitute according to this, can be with high illumination, consume that electric power is little, the also little led light source of heating is realized lighting device efficiently.
In addition, the invention is characterized in that in the lighting device of above-mentioned formation, described led light source is configured in the V slot part in the approximate V-type cross section that is formed at the described plane of incidence.According to this formation, by being configured in the V slot part, penetrate the big led light source of angle even utilize, also can incident efficiently in optical path, can realize lighting device efficiently.
In addition, the invention is characterized in that in the lighting device of above-mentioned formation, described light source is the light source that possesses along the light-emitting area of the direction extension vertical with the cross section of described T type.According to this formation, wanting to utilize under the situation of a plurality of point source of lights, melancholy adopts a light source to get final product by utilizing the light source that so possesses along the light-emitting area of the direction extension vertical with T type cross section, and assembling is adjusted easily, cost also hangs down such advantage so have.
In addition, the invention is characterized in that in the lighting device of above-mentioned formation, described lighting device is installed in the leading section of plate body, is thrown light on respectively in the both sides of this plate body.Constitute according to this, can realize the compact lighting device that can throw light on efficiently to the specific direction of the both sides of plate body.
In addition, the invention is characterized in that in the lighting device of above-mentioned formation, described plate body is shelf, to throwing light on simultaneously up and down of this shelf.Constitute according to this, can be installed to the front end of the shelf of showcase, the commodity side up and down of shelf is thrown light on a large scale efficiently.
According to the present invention, owing to become and utilize the cross section to be the lamp optical system of T type shape, penetrating respectively from first injection part and second injection part will be by the formation of the illumination light after first light of first reflecting part and the reflection of second reflecting part and second light compositing that reflects not by first reflecting part and by second reflecting part, so can have the high efficiency illumination of desirable directional property, light distribution characteristic.Therefore, even can obtain the lighting device that compact formation also can have desirable light distribution characteristic and can carry out high efficiency illumination.
Description of drawings
Fig. 1 is the perspective cross-sectional slice of the first embodiment example of expression lighting device involved in the present invention.
Fig. 2 is the perspective cross-sectional slice of the second embodiment example of expression lighting device involved in the present invention.
Fig. 3 is the perspective cross-sectional slice of the 3rd embodiment example of expression lighting device involved in the present invention.
Fig. 4 is the stereogram of the global shape of expression lighting device shown in Figure 3.
Fig. 5 is the perspective cross-sectional slice of the 4th embodiment example of expression lighting device involved in the present invention.
Fig. 6 is the perspective cross-sectional slice of the 5th embodiment example of expression lighting device involved in the present invention.
Fig. 7 is the perspective cross-sectional slice of the 6th embodiment example of expression lighting device involved in the present invention.
Fig. 8 is the perspective cross-sectional slice of the 7th embodiment example of expression lighting device involved in the present invention.
Fig. 9 is the perspective cross-sectional slice of the 8th embodiment example of expression lighting device involved in the present invention.
Figure 10 is the perspective cross-sectional slice of the 9th embodiment example of expression lighting device involved in the present invention.
Figure 11 A is the major part enlarged drawing of the tenth embodiment example of expression lighting device involved in the present invention.
Figure 11 B is the summary side view of the tenth embodiment example.
Figure 12 A is the summary description figure that lighting device involved in the present invention has been installed at the shelf front end.
Figure 12 B is the summary description figure that lighting device involved in the present invention has been installed at the shelf front end.
Figure 13 is the summary description figure that lighting device involved in the present invention has been installed in having the showcase of step shelf.
Figure 14 A is the vertical view that expression is closely aligned an example of the light source that a plurality of led light sources form.
Figure 14 B is the side view of the light source shown in Figure 14 A.
Figure 15 A is the vertical view that expression is closely aligned another example of the light source that a plurality of led light sources form.
Figure 15 B is the side view of the light source shown in Figure 15 A.
Figure 16 is the summary stereogram that expression is provided with an example of the lighting device with the light conductor that is closely aligned the light source that a plurality of led light sources form.
Figure 17 is the summary stereogram of an example that expression is provided with the lighting device of the light conductor with the light source that is made of cold-cathode tube.
The specific embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.In addition, utilize same Reference numeral for same component parts and detailed suitably.
＜first embodiment 〉
At first, utilize Fig. 1 that the first embodiment example of lighting device involved in the present invention is described.Wherein, in the following description, for the purpose of simplifying the description, suppose that light source is that point source of light describes, but also can utilize the light source except point source of light, for example flat light source or linear light source.Lighting device 1A shown in Figure 1 constitutes possesses the lamp optical system 10A that point source of light 2 and cross section form the T type, wherein, described lamp optical system 10A possesses two optical paths that will become different both directions and carry out leaded light from the optical branch of these point source of light 2 ejaculations.Therefore, this lamp optical system 10A possesses the incident section 1Aa that injects the light that penetrates from point source of light 2, the optical branch that will incide this incident section 1Aa becomes different both directions and carry out the first optical path 1Ab and the second optical path 1Ac of leaded light and penetrate being branched and by the first injection part 1Ad of the light of leaded light and the second injection part 1Ae.
And, this lamp optical system 10A possess with incident section 1Aa near the first reflecting part 11A of configuration and with the second reflecting part 12A of this incident section 1Aa arranged opposite, from first injection part and second injection part penetrate respectively by first light of the first reflecting part 11A and second reflecting part 12A reflection with not by first reflecting part 11A reflection and by the illumination light after second light compositing of second reflecting part 12A reflection.
Therefore, can be the lamp optical system 10A of T type shape by utilizing the cross section, by have reflect at least once from incident section 1Aa incident and by the first reflecting part 11A that the back is reflected once at least by the second reflecting part 12A and the light beam of lead first injection part and second injection part and from incident section 1Aa incident not by first reflecting part 11A reflection and by second reflecting part 12A reflection and the light beam of these two kinds of light paths of light beam of lead first injection part and second injection part constitutes illumination light, can realize having the high efficiency lighting device of desirable directional property, light distribution characteristic.For example, by the directional property of two light beams that superposes, even utilize the big point source of light of the angle of divergence 2, also can realize the lighting device that is only thrown light on efficiently in the zone of necessity.Therefore, even can access compact formation, also can have desirable light distribution characteristic and carry out the lighting device of high efficiency illumination.
In addition, possesses opposed the 3rd reflecting part 13A with the second reflecting part 12A, receiving light by the 3rd reflecting part 13A from the second reflecting part 12A also reflects to the second reflecting part 12A again, penetrate from injection part afterwards, can further prolong optical path length, can injection part be set in the position of being thrown light in desirable position.Therefore, can realize the lighting device that can throw light on efficiently to the zone of necessity.
Point source of light 2 for example is led light source, by utilizing blue led chip and the fluorophor that sent the exciting light of provision wavelengths from the light stimulus of this led chip are made up to carry out white luminous White LED light source, this lamp optical system 10A can be applied as the optical path of the lighting device that sends white light.As the size of this White LED light source, for example general 0.6mm * 1.2mm effect.
Penetrated (light path A) not by first reflecting part 11A reflection by the arrow DAa direction shown in the solid line of first light of second reflecting part 12A reflection from the first injection part 1Ad along figure in the light that the point source of light 2 that is made of led light source penetrates, penetrated (light path B) by the arrow DBa direction shown in the dotted line of second light of the first reflecting part 11A and second reflecting part 12A reflection from the first injection part 1Ad along figure.
Since light path B except comprise with the common light path of light path A, only also comprise the first reflecting part 11A as light path B performance function, so by inclination or the length of the control first reflecting part 11A, can control directive property, light distribution characteristic in the injection part independently with light path A.
For example, penetrate by being controlled to as the light path A that penetrates from the first injection part 1Ad as shown in the figure and light path B to same direction roughly, light beam by light path A and the light beam by light path B are overlapped, can improve the illumination light intensity, thereby desirable direction is thrown light on efficiently.
Therefore, even can constitute under the situation of utilizing the big point source of light of the angle of divergence, the also lamp optical system that can throw light on efficiently to desirable direction.
＜second embodiment 〉
Then, utilize Fig. 2 that the lighting device 1B of second embodiment is described.This lighting device 1B possesses the formation that point source of light 2 and cross section are roughly the lamp optical system 10B of T type, possessing the incident section 1Ba of the light that incident penetrates from point source of light 2, the optical branch that will incide this incident section 1Ba becomes different both directions and carries out the first optical path 1Bb and the second optical path 1Bc of leaded light and penetrate being branched and by the first injection part 1Bd of the light of leaded light and the second injection part 1Be, being the lighting device that different both directions is thrown light on simultaneously.
But, the first reflecting part 11B is tilted constituting, light path A and light path B penetrate to different directions that this are different on the one hand, are the examples that can have the illumination of two different luminous intensity distribution centers of gravity from a point source of light.For example, by making reflecting surface 11Ba and first time reflecting surface 11Bb inclination on first, can control from the luminous intensity distribution angle of the illumination light of injection part ejaculation.For example, by according to more away from light source then each other the more narrow mode in interval tilt, can change the luminous intensity distribution angle.
Namely, penetrated (light path Ab) not by first reflecting part 11B reflection by the arrow DAb direction shown in the solid line of first light of second reflecting part 12B reflection from the first injection part 1Bd to figure in the light that the point source of light 2 that is made of led light source penetrates, penetrated (light path Bb) by the arrow DBb direction shown in the dotted line of second light of the first reflecting part 11B and second reflecting part 12B reflection from the first injection part 1Bd to figure.
If above-mentioned formation, then become the light that will penetrate from the point source of light 2 that is arranged at incident section 1Ba to the last inferior division of figure and carry out leaded light, respectively the lighting device 1B to shining on a large scale.
Like this, by make encirclement be configured in the incident section point source of light 2 near the position arrange and the variations such as gradient of the inclination of the first reflecting part 11B that the light that penetrates from point source of light 2 is reflected and the injection part that changes according to the length of the length of the second reflecting part 12B and the 3rd reflecting part 13B, can control light distribution characteristic.
More than, having illustrated via the cross section to be the optical path of T type, the light that point source of light 2 is penetrated is to the lighting device of two different outgoing plane leaded lights, but also can utilize the light conductor with light transmission to form this optical path.Then, illustrate that the lamp optical system that has possesses the lighting device of light conductor.
＜the 3rd embodiment 〉
Fig. 3 has represented to utilize the lighting device 1C of the 3rd embodiment of light conductor 3C.
The related light conductor 3C of present embodiment become possess incident section 31C, the first light guide section 32C(is suitable with first optical path) suitable with second optical path with the second light guide section 33C() and the cross section T type that penetrates to different both directions, for example by the transparent member (PMMA: polymethyl methacrylate) make of refractive index about 1.5.Therefore, the angle of total reflection approximately is 42 degree.
Pair cross-section be set be the general name after the first reflecting plate 11C(that the incident section 31C suitable with axial region of T type keep merges reflecting plate 11Ca on first and first time reflecting plate 11Cb), at the fixing LED substrate 21 that the led light source that constitutes point source of light 2 is carried of this first reflecting plate 11C.Light conductor 3C, the first reflecting plate 11C and LED substrate 21 become connecting the strip member of the direction of accompanying drawing as long side direction, are to be disposed with a plurality of constituting by the point source of light 2 that led light source constitutes at long side direction.
Incident section 31C is being equipped with the plane of incidence of V groove shape with point source of light 2 opposed masks, and light beam is crossed as V groove shape to first plane of incidence 31Ca and second plane of incidence 31Cb of different both direction branches.That is, the plane of refraction that approximate V-type cross section is set with point source of light 2 opposed positions at the plane of incidence forms the light beam branching portion.If adopt such formation, then be branched off into different both directions owing to directly receiving the light that point source of light 2 penetrates, so can carry out leaded light efficiently and preferred to each injection part (the first outgoing plane 32Ca, the second outgoing plane 33Ca).
If point source of light 2 is led light sources, then this led light source is configured in the V slot part in the roughly V-type cross section that is formed at the plane of incidence.By so led light source being disposed at the V slot part, penetrate the big led light source of angle even utilize, also can realize lighting device efficiently to optical path incident efficiently.
In addition, with opposed of incident section 31C (second face) side the second reflecting plate 12C is being installed, in the back side portion that is positioned at the opposed position of the second reflecting plate 12C the 3rd reflecting plate 13C is installed, utilizes this second reflecting plate 12C and the 3rd reflecting plate 13C to seize the main part of the formation first light guide section 32C of light conductor 3C on both sides by the arms.That is, the second reflecting plate 12C and the 3rd reflecting plate 13C become the parts of regulation first optical path.
Be air layer between light conductor 3C and all reflecting plates, when the light that carries out leaded light in light conductor satisfies total reflection condition according to the refractive index of light conductor 3C, carry out total reflection in leaded light dignity, under the situation that does not satisfy total reflection condition, in case after light conductor 3C ejaculation, the plate face that is reflected reflects and returns again in the light conductor, arrives outgoing plane afterwards by leaded light.
First plane of incidence 31Ca of the light beam branching portion in formation V-type cross section and the intersecting angle of second plane of incidence 31Cb for example are 120 degree.This intersecting angle is set in the scope of 90～150 degree according to the thickness of the light-emitting area size of point source of light 2, luminous angle, light conductor 3C, the ejaculation direction of illumination light etc.Reflect from direction of advance at the plane of incidence of cross section V-type from the light that point source of light 2 penetrates via this light beam branching portion, with respect to direction of advance by to the different both direction light of upside and downside (for example towards) branch, in light conductor by towards the outgoing plane leaded light.
In addition, utilize dotted line to represent the main light of illumination light in the accompanying drawings.Light L1 penetrates from point source of light 2, reflect at first plane of incidence 31Ca, do not shine on first reflecting plate 11Ca ground and arrive second, by after the second reflecting plate 12C in second outside reflection, between the second reflecting plate 12C and the 3rd reflecting plate 13C, reflect repeatedly and be directed to the first outgoing plane 32Ca and reflect ejaculation.
Light L2 penetrates from point source of light 2, reflect at second plane of incidence 31Cb, do not shine first time reflecting plate 11Cb ground and arrive second, after by the second reflecting plate 12C in second outside reflection, the second outgoing plane 33Ca that is guided to the downside outgoing plane reflects ejaculation.
Light L3 penetrates from point source of light 2, reflects at second plane of incidence 31Cb, reaches second by first time reflecting plate 11Cb total reflection.Then, according to light L1 roughly same movement be directed to the first outgoing plane 32Ca and reflect ejaculation.
Light L4 penetrates from point source of light 2, reflects at first plane of incidence 31Ca, arrives second by reflecting plate 11Ca total reflection on first.Then, according to light L3 roughly same movement be directed to the second outgoing plane 33Ca and reflect ejaculation.
Therefore, be best by interval and length setting with reflecting plate 11Ca on first and first time reflecting plate 11Cb, and all be controlled so as to and become desirable illumination light light distribution characteristic by carrying out with the light beam of the same movement of light L1 and carry out light distribution characteristic with the light beam of the same movement of light L3, can not waste from the light ground that point source of light 2 penetrates and efficiently use as illumination light, can realize efficiently lighting device brightly.About the movement of light L2 and light L4 too.
In the present embodiment, the mode that has same light distribution characteristic according to light L1 and L3, light L2 and L4 is controlled, but by controlling according to the mode with diverse direction light distribution characteristic, can also form the lighting device that throws light on more broadly.
In addition, for example as the first outgoing plane 32Ca of upside outgoing plane with respect to the second face tilt predetermined angular that the second reflecting plate 12C is installed, 20 degree for example tilt.According to this gradient, the illumination light major part that has arrived the first outgoing plane 32Ca reflects ejaculation from direction of advance above more.
As mentioned above, preferably the angle of inclination of this first outgoing plane 32Ca for example tilts about 1～30 degree from parallel position inclination predetermined angular with respect to second, and 15～20 degree more preferably tilt.In addition, the interval between preferred second and the 3rd (outgoing plane) is along with narrowing down gradually away from light source.Formation if so, then by the gradient that makes the 3rd have with second almost parallel and along with from light source towards the outgoing plane front end and thickness reduces such gradient, can will penetrate from the illumination light that outgoing plane penetrates with the angle along second, also can be to throwing light on efficiently on a large scale even the width of lamp optical system is narrow.
In addition, with respect to the second face tilt predetermined angular that the second reflecting plate 12C is installed, 10 degree for example tilt as the second outgoing plane 33Ca of downside outgoing plane.By this gradient, arrived the illumination light of the second outgoing plane 33Ca most of as than above illumination penetrated in the illumination light that more has a luminous intensity distribution center by rear side.
The upside illumination is owing near the face that disposes illuminated object mostly outgoing plane, so be required throwing light on a large scale.On the other hand, downside illumination is owing to throw light on to the top of the object of mounting on the shelf of following one deck of the shelf that lighting device is installed, so have distance mostly and between the illuminated object.Therefore, roll tiltedly by the luminous intensity distribution center back that makes downside illumination, can from upside to be aligned to shelf in the object of portion throw light on.That is, can from just in the face of when body surface throws light on, the commodity of mounting in the shelf etc. can easily be observed in the inboard of throwing light on from the top.
In addition, the inner face that preferably is installed on second the second reflecting plate 12C is the reflecting surface with diffusion property, for example can utilize the face after the inner face that metal system is covered carries out white application.Wish that this diffusion is configured to for example glass scattering, diffusion angle σ is about 10～30 degree.If angle of flare is spent greatly, then cause illumination light to be dispersed to wide-angle, not only illumination reduces to unhelpful zone and illumination efficiency, and also existing towards observer's (for example buyer of commodity) side of object becomes the situation that does not need illumination light that the encumbrance body is observed.
Preferred second face that the light conductor 3C of the second reflecting plate 12C is installed also is diffusingsurface.For example, can arrange by the surface at light conductor 3C and tiny concavo-convexly carry out diffusingsurfaceization.In addition, wish that also this diffusion is the diffusion property with the above-mentioned diffusingsurface same degree that arranges at the inner face of the second reflecting plate 12C.
Illumination light from upside outgoing plane and downside outgoing plane reflects at outgoing plane mostly.Therefore, according to the chromatic dispersion degree difference of light conductor material, illumination light can produce irregular colour sometimes.In addition, though also exist shine that outgoing plane once total reflection takes place also and with different angles towards second side, the light beam that penetrates by second and second reflecting plate 12C reflection and from outgoing plane again.Since according to the difference of the total reflection number of times at outgoing plane place, also different from the ejaculation direction of outgoing plane, so can produce uneven illumination.At this moment, by second face of the second reflecting plate 12C inner face and light conductor 3 carry out diffusingsurfaceization, their irregular colour, uneven illumination can be improved, more uniform high-quality lighting device can be realized.
That is, by having the diffusion part 14 of the diffusion property of regulation second side setting, the photoconduction to the scattered reflection of predetermined angular scope can be penetrated the illumination light that has reduced irregular colour, uneven illumination to outgoing plane.Like this, preferred second arranges at the position towards outgoing plane reflective light the light of incident on one side to the predetermined angular scope diffusion diffusion part 14 of reflection on one side.Formation if so, even then utilize and possess the lamp optical system that is provided with the light conductor of diffusion part at reflecting surface, because the light to predetermined angular scope diffusion penetrates from outgoing plane, so also can penetrate the illumination light of having improved uneven illumination, irregular colour.
In addition, also can planar portions be set at the upper surface of light conductor 3C 32Cb, utilize the elongated surfaces of the second reflecting plate 12C to cover.Formation if so, then when this lighting device 1C is used as the lighting device of shelf, even the lighting device that disposes on the lower from the viewpoint than the observer penetrates illumination light to upside, the observer is dazzled, can easily observe, thus preferred.
In addition, also can adopt at the lower surface of light conductor 3C 33Cb planar portions is set, the formation that illumination light is also penetrated to downside.For example, under the situation of shelf in front of being configured in, only utilize the illumination light that penetrates towards the rear to throw light on to the last front of object along with layer on the lower in the front position that is shelf high-qualityly.Therefore, by as present embodiment under the below to also penetrating illumination light, can throw light on to lower floor more high-qualityly.
Therefore, the LED substrate 21 of length of the width degree of shelf is set for the whole width to shelf throw light on equably, carries a plurality of led light sources that become point source of light 2 with prescribed distance thereon.But, under the big situation of shelf width, also can adopt to be divided into a plurality of substrates, with the formation that is electrically connected separately.In addition, if this led light source the length of setting at interval height (second the height of the light conductor 3C) degree of the second reflecting plate 12C for is set.
This is because if be that then adjacent light source ejaculation light each other can mix than luminous to the short interval of optical path length till the outgoing plane ejaculation from point source of light 2.If establish the interval of point source of light 2 bigger, thereby the quantity that arranges that then can reduce point source of light 2 reduces cost.
But, owing to arrange at interval more widely, then more be easy to produce the uneven illumination of long side direction, so preferably according to the short length of the optical path length of Mingguang City, for example as present embodiment, be the interval about the height of the second reflecting plate 12C.
In addition, in the present embodiment, owing to form cross section T type, so the optical path length from the light source to the outgoing plane is longer than the width (thickness) of lighting unit.Therefore, even the size of lighting unit is set for slim at above-below direction, also can at interval set greatlyyer arranging of point source of light 2, be the formation that is conducive to cost degradation.
The both sides of preferred lighting unit are covered by side cover 15, and the left and right sides both ends of the surface from light conductor 3C do not penetrate illumination light laterally.In addition, the inner face of side cover 15 becomes reflecting surface, and the illumination light that arrives side cover 15 is got back in the light conductor 3C again, is being penetrated as illumination light from outgoing plane by any one reflecting surface reflection back.
Like this, the related lamp optical system 10C of present embodiment that is formed by light conductor 3C is that the long side direction of T type is set up in parallel a plurality of point source of lights 2, the injection part that has long size along this long side direction with predetermined distance in the cross section.Therefore, can utilize a plurality of point source of lights 2 to throw light on the long side direction of high illumination to lamp optical system on a large scale.In addition, owing to have and reflect the optical path of leaded light on one side on one side repeatedly, so even it is big to be set up in parallel the disposition interval of a plurality of point source of light 2, also can reduce the uneven illumination of long side direction and throw light on equably, also can reduce the quantity that arranges of point source of light, therefore can reduce cost.
Above-mentioned lamp optical system is asymmetric at above-below direction.In addition, only have backside reflection face (the 3rd reflecting plate 13C) at upside, the light path from the light source to the outgoing plane is guaranteed must be longer.Rear by this backside reflection face is fixing on the shelf according to the mode that the end face with shelf joins, and lighting object thing efficiently can lead from the light that lamp optical system penetrates.
Therefore, the lighting device 1C that possesses point source of light 2 and light conductor 3C and be installed in the shelf front end can carry out distribution controls to the light of point source of light 2, become clear and efficiently throw light on equably to desirable specific direction, can throw light on to the commodity that in the showcase that has step shelf up and down, display well.
Wherein, form higher illumination in order to make this lighting device 1C, as long as utilize the led light source of high brightness as the led light source of point source of light 2, more led light source perhaps is set gets final product.An example of having represented to be closely aligned the light source 40 that configuration forms as the led light source K1 of white light source among Figure 14 A, the 14B is light source 40A.Figure 14 A is the vertical view of light source 40A, and Figure 14 B is the side view of light source 40A.
Led light source K1 is by on the blue led 41 that possesses the centre of luminescence 41a that sends blue light 43, and the conversion efficiency that has to stipulate forms the fluorophor 42 that blue light 43 is transformed into sodium yellow 44.Because the part of blue light 43 is transformed into sodium yellow 44, remaining penetrates led light source K1, so form white light by blue light 43 and sodium yellow 44 mixing.
We can say that this light source is linear light source, we can say that also this light source is the area source (XY face) of the length of wire.Therefore, in the present invention, also can replace the row of point source of light 2 and utilize the light source that possesses the light-emitting area of extending in the direction vertical with the cross section of T font.The formation first reflecting part 11A(in preferred this light source is with reference to Fig. 1) two reflectings surface between the length of direction (being Y-direction among the figure) the smaller the better.Wherein, under the situation of point source of light, the length of the direction between certain two reflectings surface is also the smaller the better.
That is, said point source of light refers to compare with the size of lamp optical system here, for example the equal enough little light source of the size up and down of the light-emitting area that light is penetrated to horizontal direction.For example, refer to the length with respect to the direction between two reflectings surface that constitute the first reflecting part 11A, the light source of the length of this direction of point source of light fully little (for example being 1/3).By forming this size, can throw light on efficiently to specific direction.
As possessing arranging other examples that point source of light is the light source of the direction of the LED light-emitting area of extending, the light source 40B shown in Figure 15 A, the 15B is for example arranged.Figure 15 A is the vertical view of light source 40B, and Figure 15 B is the side view of light source 40B.This light source 40B possesses substrate 21, be installed in a plurality of blue leds 41 on the substrate 21 and cover the fluorophor 42 of a plurality of blue leds 41.Be formed with for the wiring pattern to blue led 41 supply capabilities at substrate 21, an electrode contact of blue led 41 begins to engage to another contact conductor from wiring pattern on this wiring pattern.
Blue led 41 is accepted the supply of electric power, sends blue light 43 from light-emitting area.In the process that blue light 43 carries out, be transformed into sodium yellow 44 with the conversion efficiency corresponding with the characteristic of fluorophor 42 in fluorophor 42.The light that fluorophor 42 penetrates becomes white light by blue light 43 and sodium yellow 44 appropriateness mixing, and light source 40B penetrates white light.
Figure 16 represents to possess this light source 40(40A, 40B) and the example of the lighting device 1C of light conductor 3C.In addition, there is thin-line-shaped cold-cathode tube in other examples as suitable with this light source 40.Figure 17 represents to possess the variation of the lighting device 1C of this light source 50.Lighting device 1C shown in Figure 17 forms by light conductor 3C is installed the light source 50 that is made of cold-cathode tube.
Then, utilize Fig. 5 and Fig. 6 to possess make light that point source of light 2 penetrates reliably the lighting device of the light beam branching portion of branch describe.
＜the 4th embodiment 〉
Fig. 5 represents to possess the lighting device 1D of the 4th embodiment that has the light beam branching portion 16 in V-type cross section at second of light conductor and second reflecting plate.That is, be the example that possesses the light conductor 3D formation lamp optical system 10D of light beam branching portion 16.Formation and aforesaid lighting device 1C beyond this light beam branching portion 16 are same, therefore are not described further.
Light beam branching portion 16 becomes the roughly V-type cross section that the first face 16a of branch and the second face 16b of branch intersect with predetermined angular, by the light of the first face 16a of branch reflection via the first light guide section 32D, the first outgoing plane 32Da that leads, will be by the light of the second face 16b of branch reflection via the second light guide section 33D, the second outgoing plane 33Da that leads.
In addition, for this light beam branching portion 16 is set, become as second mask be equipped with the V-arrangement shape recess light conductor 3D and utilized the second reflecting plate 12D that possesses the cross section V-type protuberance that matches with this recess.Because under the state that does not possess such light beam branching portion 16, between opposed second reflecting plate and light source part, come and go to the light that approximate frontal penetrates from light source, to from injection part to till optical path length elongated, so become the reason that the temperature of lighting device rises.In addition, the possibility that penetrates in unwanted direction uprises, and causes the light utilization ratio also to reduce.
Like this, by appending light beam branching portion 16, the luminous intensity distribution center of gravity that can make the illumination light that penetrates from the outgoing plane of upside and downside can be thrown light on to wider efficiently further towards the top or the below.Therefore, even enlarged shelf at interval for the commodity that display a head height, also penetrate illumination light to being easy to look the direction of recognizing commodity, can throw light on equably.
For example, have: penetrate from point source of light 2, from second plane of incidence 31Db incident, arrived second by first time reflecting plate 11Db reflection, by after the second reflecting plate 12D in second outside reflection, interreflection and lead the first outgoing plane 32Da and reflect the light L1a of ejaculation between the second reflecting plate 12D and the 3rd reflecting plate 13D; With penetrate from point source of light 2, from first plane of incidence 31Da incident, directly arrive second, after by the second reflecting plate 12D in second outside reflection, interreflection and lead the first outgoing plane 32Da and reflect the light L1b of ejaculation between the second reflecting plate 12D and the 3rd reflecting plate 13D.In addition, also penetrate by light L2a, L2b after the prescribed direction distribution controls from downside.
In addition, preferably the reflecting surface beyond this light beam branching portion 16 and aforesaid lighting device 1C similarly by diffusingsurfaceization.For example, become at the position that approaches with outgoing plane and arrange by the formation of the diffusion part 14 after the asperitiesization.And, by with this light beam branching portion 16 as minute surface, before arriving diffusion part 14, reflect whole light well and carry out leaded light, can carry out the distribution controls of illumination light more efficiently.
＜the 5th embodiment 〉
Fig. 6 has represented the lighting device 1E of the 5th embodiment.This lighting device 1E be make with the reflecting surface of point source of light 2 arranged opposite, with the example that upside and the downside of point source of light 2 opposed bending points 17 all tilts laterally, be possess second bending light conductor 3E and form the formation of the second reflecting plate 12E of crooked reflecting surface.In addition, this bending point 17 becomes the light beam branching portion.
Like this, by making the reflecting surface integral inclination to injection part, the direct of travel of the light that is directed just little by little broadens whenever carrying out reflex time repeatedly, can guarantee the extended corner of the above-below direction of the illumination light that finally penetrates bigger.
Therefore, this reflecting surface is the second reflecting plate 12F(, second reflecting part) while the light that becomes incident is diffused into the inclined plane that the predetermined angular scope reflects.Formation if so, then owing to by second reflecting part is tilted, can enlarge the distribution controls angle, preferred so can realize the lighting device that can throw light on efficiently to the zone of necessity.
In addition, the incident section 31E of reflecting plate 11Ea near first the light source, first time reflecting plate 11Eb and light conductor 3E according to more away from light source at interval more big mode tilt.Thus, can make the high light beam that penetrates along normal direction of from the light that light source the penetrates luminous intensity light path of branch along the vertical direction that leads efficiently.
For example, have from point source of light 2 and penetrate, from second plane of incidence 31Eb incident, arrived second by first time reflecting plate 11Eb reflection, after by the second reflecting plate 12E in second outside reflection, interreflection between the second reflecting plate 12E and the 3rd reflecting plate 13E and the first outgoing plane 32Ea that leads, the light L1a that refraction is more up penetrated; With penetrate from point source of light 2, directly arrive second from first plane of incidence 31Ea incident, by after the second reflecting plate 12E in second outside reflection, interreflection between the second reflecting plate 12E and the 3rd reflecting plate 13E and the first outgoing plane 32Ea that leads, the light L1b of refraction ejaculation more down.In addition, also penetrate by light L2a, L2b to the prescribed direction distribution controls from downside.
Like this, if be provided with in the incident section according to more away from the light source formation of the reflecting surface that tilts of more big mode at interval, then the light by the reflection of the reflecting surface of this inclination is controlled in the little direction of its reflection angle, and is controlled so as to from outgoing plane up and down respectively near the illumination light that rear is more shone of horizontal direction.Thus, upside illumination, downside illumination can be thrown light on to bigger scope respectively.
To above-mentioned light conductor 3(3C, 3D, 3E) all the light conductor as the cross section T type that possesses incident section, first light guide section and second light guide section be illustrated, but also can in the lamp optical system of cross section T type, set tabular light conductor, utilize Fig. 7, Fig. 8 to be illustrated at this configuration example.
＜the 6th embodiment 〉
Fig. 7 has represented the lighting device 1F of the 6th embodiment.This lighting device 1F is the example that has set tabular light conductor 3F in the lamp optical system of cross section T type, and first face of the light incident that point source of light 2 penetrates becomes plane of incidence 3Fa.In addition, tabular upside becomes the first light guide section 32F, and downside becomes the second light guide section 33F.
The light that penetrates from the point source of light 2 that is positioned at away from the position of plane of incidence 3Fa comprises: after by first time reflecting plate 11Fb reflection, and the light L1a, the L1b that penetrate by the second reflecting plate 12F of the first light guide section 32F and the 3rd reflecting plate 13F interreflection and from the first injection part 32Fa; Directly penetrate towards the second reflecting plate 12F, then interreflection and from the light L1c of first injection part 32Fa ejaculation between the second reflecting plate 12F and the 3rd reflecting plate 13F.In addition, the light that penetrates from the second injection part 33Fa of downside comprises: on by first after the reflecting plate 11Fa reflection, by the second reflecting plate 12F reflection of the first light guide section 32F and light L2a, the L2c that penetrates; Directly penetrate the light L2b that is penetrated by this second reflecting plate 12F reflection towards the second reflecting plate 12F.
As above-mentioned light L1a～c, L2a～c, by the position is set, constitutes the angle of inclination etc. of reflecting plate, second reflecting plate and the 3rd reflecting plate and outgoing plane about in the of first that the cross section is the lamp optical system of T type of point source of light 2, can realize having the illumination light of desirable light distribution characteristic.
Because above-mentioned lighting device 1F utilizes tabular light conductor 3F, constitute so become simple light conductor, can in the distribution controls of carrying out illumination light, reduce cost.
＜the 7th embodiment 〉
Fig. 8 represents the lighting device 1G of the 7th embodiment.This lighting device 1G is the example that sets tabular light conductor 3G in the lamp optical system of cross section T type.In addition, this light conductor 3G is that the plane of incidence being provided with at aforesaid the 6th embodiment becomes first plane of incidence 31Ga of light beam branching portion and the example of second plane of incidence 31Gb, constitutes the efficient branch of light light guide section up and down that point source of light 2 is penetrated.
For this reason, light conductor 3G has and has intersected for the formation of cross section V-type first plane of incidence 31Ga and the plane of incidence 3Ga of second plane of incidence 31Gb, the tabular first light guide section 32G and the second light guide section 33G.And, penetrate following illumination light from the first injection part 32Ga of upside: penetrate and by first time reflecting plate 11Gb reflection the light L1a that is penetrated by the second reflecting plate 12G of the first light guide section 32G and the 3rd reflecting plate 13G interreflection from point source of light 2; From first plane of incidence 31Ga incident, light L1b that is penetrated with the 3rd reflecting plate 13G interreflection by the second reflecting plate 12G etc. is become the illumination light of predetermined angular by distribution controls.
In addition, penetrate following illumination light from the second injection part 33Ga of downside: penetrate and by reflecting plate 11Ga reflection on first, the light L2a that is penetrated by the second reflecting plate 12G reflection of the first light guide section 32G from point source of light 2; From second plane of incidence 31Gb incident by second reflecting plate 12G reflection and the light L2b that penetrates etc. are become the illumination light of predetermined angular by distribution controls.
In addition, preferably at the reflecting surface of the second reflecting plate 12G, the reflecting surface of light conductor 3G aforesaid diffusion part 14 is set, by this diffusion part 14, with the photoconduction that is diffused into the angular range of regulation and is reflected to outgoing plane, refraction is penetrated from outgoing plane to predetermined angular, can realize improving the illumination light of irregular colour, uneven illumination thus.
Because above-mentioned lighting device 1G also utilizes tabular light conductor 3G, constitute so become simple light conductor, can realize cheaply and lighting device efficiently.
In addition, even do not use the lamp optical system of light conductor, the light beam branching portion also can be set and to different both directions branch well.The the 8th, the 9th embodiment at being provided with this light beam branching portion utilizes Fig. 9 and Figure 10 to be illustrated.
＜the 8th embodiment 〉
The lighting device 1H of the 8th embodiment shown in Figure 9 has the lamp optical system of not using light conductor and only being made of reflecting surface.In addition, be formed with light beam branching portion 16 at the second reflecting plate 12H.
Therefore, the light that has arrived the first face 16a of branch from the light that point source of light 2 penetrates has been arrived the light of the second face 16b of branch by the second light guide section 1Hc leaded light to downside by the first light guide section 1Hb leaded light to upside.
For example, have from point source of light 2 and penetrate and directly arrive the first face 16a of branch and towards the 3rd reflecting plate 13H reflection, the light L1a that penetrates from injection part 1Hd; Penetrate the directly arrival first face 16a of branch from point source of light 2, and then the light L1b that directly penetrates towards injection part 1Hd reflection; After arriving the second reflecting plate 12H by reflecting plate 11Ha on first, first time reflecting plate 11Hb reflection and being reflected, the light L1c that penetrates from injection part 1Hd; Interreflection between the second reflecting plate 12H and the 3rd reflecting plate 13H and light L1d of penetrating etc.In addition, the injection part 1He from downside also penetrates according to the mode that is diffused into prescribed limit by light L2a, the L2b of distribution controls, L2c, L2d etc.
In addition, preferably the reflecting surface at the second reflecting plate 12H is provided with aforesaid diffusion part 14, the light that utilizes this diffusion part 14 will be diffused into the angular range of regulation and be reflected spreads from outgoing plane to the predetermined angular scope and penetrates, and can realize having improved the illumination light of uneven illumination thus.
Like this, preferably at second reflecting part (the second reflecting plate 12H) towards the position of injection part reflective light, be provided with the light of incident on one side to the predetermined angular scope diffusion diffusion part of reflection on one side.Formation if so is then owing to being penetrated from outgoing plane by the light of second reflecting part to the diffusion of predetermined angular scope, so can penetrate the illumination light of having improved uneven illumination.In addition owing at the position that approaches with injection part diffusion part is set, so illumination light can be led efficiently penetrate near.
In addition, tilt by making reflecting plate 11Ha on first, first time reflecting plate 11Hb, can control from the luminous intensity distribution angle of the illumination light of injection part ejaculation.For example, if be inclined to each other interval along with the stenosis away from light source, it is little during than configured in parallel then can be controlled to the luminous intensity distribution angle that makes the illumination light that penetrates from injection part.
＜the 9th embodiment 〉
In addition, also can in the light path of lighting device 1H, set light conductor, for example as shown in figure 10, become the lighting device 1K of the 9th embodiment that is provided with flat light conductor 3K.
If should constitute, then owing to the light that penetrates from outgoing plane up and down with the predetermined angular refraction, so can further control the luminous intensity distribution angle of illumination light.In addition, can make outgoing plane (the first outgoing plane 32Ka, the second outgoing plane 33Ka) up and down with respect to the second reflecting plate 12K inclination predetermined angular (for example 50 degree), make the illumination light of ejaculation to the direction refraction near light source.
Like this, outgoing plane (the 3rd face) also can (reflecting surface: the second reflecting plate 12K) from parallel position 50～80 degree that tilt, second and the 3rd 's interval be along with the stenosis away from light source with respect to second.Formation if so, then by the 3rd gradient being set for the angle that approaches with second vertical direction, the illumination light that can penetrate from outgoing plane pair and second face vertically approaching direction high efficiency throw light on.
For example, have from point source of light 2 and penetrate, arrived the first face 16a of branch by reflecting plate 11Ka on first, first time reflecting plate 11Kb reflection, reflected by reflecting plate 13Ka on the 3rd, and then turn back to second, after the second reflecting plate 12K reflection by second outside, from the light L1a of second outgoing plane 32Ka ejaculation; Penetrate the directly arrival first face 16a of branch from point source of light 2, interreflection between reflecting plate 13Ka on the 3rd and the second reflecting plate 12K and the light L1b that penetrates etc.In addition, the second outgoing plane 33Ka from downside also penetrates by distribution controls to become with predetermined angular to reflect light L2a, the L2b etc. that penetrate.
In addition, tilt by making reflecting plate 11Ka on first, first time reflecting plate 11Kb, can control the luminous intensity distribution angle of the illumination light of ejaculation.For example, if tilt along with become big mode away from light source according to mutual interval, become big when then the luminous intensity distribution angle of the illumination light that can penetrate from injection part is controlled to than configured in parallel.
The front end that is installed to plate body, for example shelf by the lighting device 1K with above-mentioned formation is used, and can realize near the lighting device that throws light on effectively the hope position to the object of mounting on the shelf.For example, can realize effective lighting device that the front end region of shelf is thrown light on.
In addition, also this lighting device 1K can be installed to shelf plate body in addition and be used, for example by this lighting device G is installed on the top of partition wall, can throw light on to the two side areas of partition wall efficiently.For this reason, at the embodiment that lighting device 1K is installed to the top of partition wall, utilize Figure 11 A, Figure 11 B to describe.
＜the tenth embodiment 〉
Shown in Figure 11 A, in the tenth embodiment, the top that lighting device 1K is installed to partition wall 5A is used.In addition, become the formation of taking in reflecting plate 11Ka on first, first time reflecting plate 11Kb among the housing recess 5Aa that forms on the top of partition wall 5A and carrying the LED substrate 21 of point source of light 2.That is the jut of chimeric maintenance lighting device 1K.In addition, the width of lighting device 1K is identical with the thickness degree of partition wall 5A, and the outgoing plane that tilts from the both sides of light conductor 3K penetrates illumination light towards oblique below.
Therefore, shown in Figure 11 B, penetrate towards the left side of partition wall 5A by distribution controls in advance and become light L3a, the L3b that penetrates towards the regulation zone, penetrate towards the right side by distribution controls in advance and become light L4a, the L4b that penetrates towards the regulation zone.
Because the ejaculation direction of illumination light can be predesignated by the formation of lamp optical system, so can not penetrate and the light of inhibition waste to unwanted direction, realize lighting device efficiently.In addition, point source of light 2 in the vertical direction of paper with the arranged spaced wideer than the thickness of partition wall 5A.Like this, can utilize the regulation zone of the both sides of the related plate body of lighting device 1K (partition wall 5A) of present embodiment effectively and efficiently to throw light on.
Then, be installed to for the lighting device that present embodiment is related showcase shelf leading section and the example that is used utilizes Figure 12 A, Figure 12 B and Figure 13 further to describe.
Figure 12 A has represented lighting device 1C is installed to the front end of shelf 5B, penetrates by the state with the illumination light of predetermined angular distribution controls to the upside of this shelf 5B and downside two sides.In addition, the leading section at shelf 5B utilizes installing component 6 that lighting device 1C is installed.In addition, utilize and to be fixed in the place ahead holding components 7, that protect excellent 8a on possessing and protect the commodity M1 of 8 pairs of mountings of watch box on shelf 5B of excellent 8b down and to support, prevent falling of commodity M1.
The light that penetrates from point source of light 2 comprise on one side by the second reflection version 12C of light conductor 3C and the 3rd reflecting plate 13C reflection on one side in light conductor 3C leaded light and from the upside outgoing plane light L1a, L1b, the L1c of the specific direction distribution controls to regulation.In addition, the outgoing plane from downside penetrates by light L2a, L2b, L2c, L2d etc. to the specific direction distribution controls.At this moment, also can become formation by reflecting surface 6a antireflection part light (for example light L2b).
As present embodiment, if utilize bar-shaped watch box (protecting rod), then illumination light can not be protected rod and blocked, and can throw light on to commodity M1 efficiently.In addition, preferably protecting rod is that the material low by reflectivity, that diffusion property is big constitutes.This is because if protect the reflectivity height of rod, thereby then illumination light can reflect the observation that hinders commodity M1.
In addition, under the low situation of diffusion property, when illumination light is being protected reverberation in the rod and entered into observer's eyes, also can hinder the observation commodity.The cross sectional shape that preferably protects rod is circular, if circular, then can be controlled to being expanded to by the illumination light of protecting excellent scattered reflection widerly, does not hinder the observation commodity.
And, if shown in Figure 12 B will on protect the excellent 8a configuration of forwards staggering, then can reduce the contrast of protecting excellent shadow that projects to the commodity surface, can realize more high-quality illumination.
Protecting excellent 8b down is configured near the front end of shelf 5B for the position of limiting commodity M1, even by the scope that tilts also not drop at commodity M1, will on protect excellent 8a be configured in than under protect excellent 8b on the front, can utilize down and protect excellent 8b and guarantee to separate certain interval with the commodity M1 of limited location system.
In addition, the related lighting device of the present embodiment that can throw light on to different both directions can preferably be used in the showcase that possesses step shelf.
For example, as shown in Figure 13, at the shelf 5C of upside lighting device 1C1 is installed, at the shelf 5D of downside lighting device 1C2 is installed.
If should constitute, then by utilizing light L11a that the lighting device 1C1 that installs at the shelf 5C of upside penetrates to be thrown light in the front at the commodity M1a of shelf 5C mounting, and utilize the light L21a that penetrates to be thrown light in the top at the commodity M2a of shelf 5D mounting down.In addition, the light L12a that the lighting device 1C2 that utilization is installed at the shelf 5D of downside penetrates throws light on to the front of the commodity M2a of mounting on shelf 5D, and utilizes the light L22a that penetrates to be thrown light in the top of other commodity of mounting on the shelf of this lower floor down.
Like this, owing to can utilize a light source that upside and the downside of shelf are thrown light on simultaneously, even so at the showcase of the commodity of a step shelf display head height, also can throw light on efficiently to commodity front and top, make and observe transfiguration easily and preferred.
In addition, in the embodiment example, utilize chip-shaped led light source as point source of light 2, but also can be other point source of light, for example can utilize the led light source of lens-attached or bulb type.
As mentioned above, according to lighting device involved in the present invention, at least reflect after 1 time the light beam that is reflected at least once by second reflecting part and derive to first injection part, second injection part from incident section incident and by first reflecting part by utilizing the cross section to be the lamp optical system of T type shape, can utilize to have; Constitute illumination light with the light beam of these the two kinds of light paths of light beam that derive to first injection part, second injection part not by first reflecting part reflection and by the reflection of second reflecting part from incident section incident, can realize having the high efficiency lighting device of desirable directional property, light distribution characteristic.For example, by the directional property of two light beams that superposes, even utilize the big point source of light of the angle of divergence, also can realize the lighting device that can only throw light on efficiently to the zone of necessity.
That is, by utilizing lighting device involved in the present invention, can realize the compact lighting device that can throw light on efficiently to the specific direction of plate body both sides.Therefore, even compact formation also can access the lighting device that has desirable light distribution characteristic and carry out high efficiency illumination.
In addition, because by in light path, setting light conductor, can utilize the refraction in each face of light conductor to control illumination light, so can realize lighting device efficiently with high-performance more.
Utilizability on the industry
Therefore, lighting device involved in the present invention can be applied to the lighting device that throws light on for to the commodity at the individual head height of the multiple field showcase mounting that possesses a plurality of shelves up and down well.
Description of reference numerals: 1A～1K ... lighting device; 2 ... point source of light (light source, led light source); 3C～3G ... light conductor; 5A ... partition wall; 5B ... shelf; 10A～10D ... lamp optical system; 11,11A～11H ... the plane of incidence; 12 ... reflecting surface; 12Aa～12Ha ... first reflecting surface; 12Ab～12Hb ... second reflecting surface; 13 ... outgoing plane; 14 ... diffusion part; L1, L1a～L1d ... light; L2, L2a～L2d ... light.
Claims (18)
1. a lighting device has the lamp optical system that light source and cross section are the T type, and different both directions is thrown light on simultaneously, and described lamp optical system has: for the incident section of the light incident of penetrating from this light source; The optical branch that incides this incident section become different both directions and carry out first optical path and second optical path of leaded light; And penetrate and to be branched and by first injection part of the light behind the leaded light and second injection part, this lighting device is characterised in that,
Described lamp optical system possess with described incident section approach configuration first reflecting part and with second reflecting part of this incident section arranged opposite,
Penetrating respectively from described first injection part and second injection part will be by the illumination light after first light of described first reflecting part and the reflection of described second reflecting part and second light compositing that is not reflected by described second reflecting part via described first reflecting part.
2. lighting device according to claim 1 is characterized in that,
Described lamp optical system possesses and opposed the 3rd reflecting part of described second reflecting part, and the 3rd reflecting part receives light also again towards described second reflecting part reflection from described second reflecting part, penetrates from described injection part then.
3. according to claim 1 or 2 described lighting devices, it is characterized in that,
Be provided with the light beam branching portion, this light beam branching portion will become the light towards described first injection part and second injection part from the optical branch that described light source penetrates.
4. lighting device according to claim 3 is characterized in that,
Described light beam branching portion be configured in described second reflecting part with the opposed position of described point source of light, constituted by the protruding reflecting surface of approximate V-type.
5. according to any described lighting device in the claim 1 to 4, it is characterized in that,
Described lamp optical system possesses light conductor, and this light conductor has the plane of incidence of the light institute incident of penetrating from described light source, along second of described second reflecting part and become the 3rd of described injection part.
6. lighting device according to claim 5 is characterized in that,
The plane of refraction that approximate V-type cross section is set with the opposed position of described light source at the described plane of incidence forms the light beam branching portion.
7. according to claim 5 or 6 described lighting devices, it is characterized in that,
Described the 3rd with respect to described second from parallel position 1～30 degree that tilts, the interval between second and the 3rd is along with narrowing down gradually away from light source.
8. according to claim 5 or 6 described lighting devices, it is characterized in that,
Described the 3rd with respect to described second from parallel position 50～80 degree that tilt, the interval between second and the 3rd is along with narrowing down away from light source.
9. according to any described lighting device in the claim 1 to 8, it is characterized in that,
The light that described second reflecting part is provided with at the position towards described injection part reflective light incident spreads the diffusion part of reflection on one side in the predetermined angular scope on one side.
10. according to any described lighting device in the claim 5 to 8, it is characterized in that,
Described second light that is provided with incident at the position towards described outgoing plane reflective light spreads the diffusion part of reflection on one side in the predetermined angular scope on one side.
11. according to any described lighting device in the claim 1 to 10, it is characterized in that,
The light that described second reflecting part becomes incident spreads the inclined plane of reflection on one side in the predetermined angular scope on one side.
12. according to any described lighting device in the claim 1 to 11, it is characterized in that,
Described lamp optical system is that the long side direction of T type is set up in parallel a plurality of described light sources, the injection part that has long size along this long side direction with predetermined distance in the cross section.
13. according to any described lighting device in the claim 1 to 12, it is characterized in that,
Described light source is point source of light.
14. lighting device according to claim 13 is characterized in that,
Described point source of light is made of led light source.
15. lighting device according to claim 14 is characterized in that,
Described led light source is configured in the V slot part in the approximate V-type cross section that is formed at the described plane of incidence.
16. according to any described lighting device in the claim 1 to 15, it is characterized in that
Described light source is the light source that possesses along the light-emitting area of the direction extension vertical with the cross section of described T type.
17. according to any described lighting device in the claim 1 to 16, it is characterized in that,
Described lighting device is installed in the leading section of plate body, is thrown light on respectively in the both sides of this plate body.
18. lighting device according to claim 17 is characterized in that,
Described plate body is shelf, to throwing light on simultaneously up and down of this shelf.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-023387 | 2011-02-04 | ||
| JP2011023387 | 2011-02-04 | ||
| PCT/JP2012/050893 WO2012105314A1 (en) | 2011-02-04 | 2012-01-18 | Illuminating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103348183A true CN103348183A (en) | 2013-10-09 |
Family
ID=46602534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012800072314A Pending CN103348183A (en) | 2011-02-04 | 2012-01-18 | Illuminating device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5768821B2 (en) |
| CN (1) | CN103348183A (en) |
| WO (1) | WO2012105314A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105829795A (en) * | 2013-12-19 | 2016-08-03 | 3M创新有限公司 | Modular distribution system |
| CN107965704A (en) * | 2017-12-20 | 2018-04-27 | 欧普照明股份有限公司 | Lighting device and lighting system |
| EP4660519A1 (en) * | 2024-06-03 | 2025-12-10 | ASPÖCK Systems GmbH | Light with a light guide and a light-emitting diode arrangement, and furniture element comprising same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012161474A (en) * | 2011-02-07 | 2012-08-30 | Fukushima Industries Corp | Lighting equipment of showcase, and showcase |
| WO2012138503A2 (en) * | 2011-04-08 | 2012-10-11 | 3M Innovative Properties Company | Light duct tee extractor |
| US9081125B2 (en) | 2011-08-08 | 2015-07-14 | Quarkstar Llc | Illumination devices including multiple light emitting elements |
| CN104755832B (en) | 2012-09-13 | 2018-12-21 | 夸克星有限责任公司 | Lighting systems providing direct and indirect lighting |
| US9733414B2 (en) | 2013-02-08 | 2017-08-15 | Quarkstar Llc | Illumination system based on active and passive illumination devices |
| FR3005138B1 (en) * | 2013-04-30 | 2015-04-24 | Automotive Lighting Rear Lamps France | LED LIGHTING DEVICE WITH DIFFUSER SYSTEM AND 3D EFFECT |
| CN105659027B (en) | 2013-07-18 | 2018-03-13 | 夸克星有限责任公司 | Source light injected into an illumination device that is not parallel to the optical axis of the device |
| EP3063466B1 (en) | 2013-09-17 | 2022-01-05 | Quarkstar LLC | Illumination device for direct-indirect illumination |
| US10545276B2 (en) | 2014-11-07 | 2020-01-28 | Quarkstar Llc | Stack lighter luminaire |
| JP6512879B2 (en) * | 2015-03-11 | 2019-05-15 | 三菱電機株式会社 | Surface light source device and liquid crystal display device |
| CN106764681B (en) * | 2016-12-22 | 2024-03-15 | 赛尔富电子有限公司 | LED strip lamp for shelf nameplate |
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| JPS5379560A (en) * | 1976-12-24 | 1978-07-14 | Oki Electric Ind Co Ltd | Optical branching guide |
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| CN107965704A (en) * | 2017-12-20 | 2018-04-27 | 欧普照明股份有限公司 | Lighting device and lighting system |
| EP4660519A1 (en) * | 2024-06-03 | 2025-12-10 | ASPÖCK Systems GmbH | Light with a light guide and a light-emitting diode arrangement, and furniture element comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5768821B2 (en) | 2015-08-26 |
| WO2012105314A1 (en) | 2012-08-09 |
| JPWO2012105314A1 (en) | 2014-07-03 |
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Application publication date: 20131009 |