CN102997106A - Illumination device and illumination stand - Google Patents

Illumination device and illumination stand Download PDF

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Publication number
CN102997106A
CN102997106A CN2012103232181A CN201210323218A CN102997106A CN 102997106 A CN102997106 A CN 102997106A CN 2012103232181 A CN2012103232181 A CN 2012103232181A CN 201210323218 A CN201210323218 A CN 201210323218A CN 102997106 A CN102997106 A CN 102997106A
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CN
China
Prior art keywords
light
interarea
plane
lighting device
lgp
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012103232181A
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Chinese (zh)
Inventor
清水佳恵
谷尻靖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Opto Inc
Konica Minolta Advanced Layers Inc
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Konica Minolta Opto Inc
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Publication date
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Publication of CN102997106A publication Critical patent/CN102997106A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • F21S6/002—Table lamps, e.g. for ambient lighting
    • 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
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • 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
    • 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]

Abstract

Provided are an illumination device capable of emitting intense light in a direction different from the direction in which the main surface of a light guide plate for emitting illumination light is directed and an illumination stand having the illumination device, which is capable of efficiently illuminating its surroundings even with low power consumption. In an illumination device (U) for illumination equipment guides light emitted from a light emitting element (2) through a light guide plate (1) and emitting the light from a first main surface (11), a light pickup section (15) is provided on either the first main surface (11) or a second main surface (12) and the emitted illumination light is deflected by the light pickup section (15) by a prescribed angle from the vertical direction of the first main surface. The illumination equipment and an illumination stand (ST1) employing the illumination device (U) are realized.

Description

Lighting device and lighting lamp
Technical field
The present invention relates to a kind of lighting device and lighting lamp.
Background technology
In the past, as the light source backlight of liquid crystal panel, be widely used the light source (with reference to patent documentation 1,3) that uses fluorescent lamp.Backlight about edge light (edge light) formula particularly, at the rear side configuration LGP of liquid crystal panel, and at the light sources such as sidepiece configuration fluorescent lamp of this LGP.In this case, light source is configured in the position away from the shared zone of liquid crystal panel, and light carries out total reflection and propagation in the inside of LGP, and therefore have following advantage: brightness irregularities can not become greatly, and can make the thickness attenuation of device integral body.
Here, technology according to patent documentation 1, make light source light incide LGP near directional light by the concentrator that is disposed between light source and the LGP, thereby can improve the light utilization ratio and make the ejaculation light that penetrates to the LGP vertical direction evenly obtain to be applicable to the backlight of liquid crystal etc.
On the other hand, patent documentation 2 discloses a kind of lightguide (Light Guide), and this lightguide comprises: light source; Speculum, cover this light source around, from distolateral projection opening irradiation light; And the guide portion of hollow, be connected with the projection opening of speculum and the light from light source of institute's incident is guided and penetrates from required periphery.Such lightguide is provided with light and cuts apart light guide member, and this light is cut apart the light that light guide member will incide from the projection opening of speculum guide portion and is divided into a plurality of directions and makes light point to required direction.Be not to be the leaded light that utilizes the reflection of lightguide inner face to carry out, but utilize light to cut apart the light guide member leaded light to the position of the regulation of guide portion.
In recent years, used LED(Light Emitting Diode: lighting device light emitting diode) is able to practical gradually, and wherein, LED has realized the raising of luminous efficiency, the increase of luminous quantity, and life and power consumption diminish, and is conducive to environment.In addition, since developing the blue led chip, the fluorophor that excites with this blue led chip with by the light from this led chip and send the exciting light of provision wavelengths the combine White LED light source that sends white light and the White LED light source that synthesizes white light with the three-primary color LED chip of blue led chip, green LED chip and red LED chips have been developed.
For this reason, as the lighting device of ligthing paraphernalia, used the LED lighting device that disposes this White LED light source.The lighting device of particularly using as lighting lamp has been groped to use the led light source that power consumption is little, heating is also little, the lighting device (for example, with reference to patent documentation 4) that has for example proposed to use the lighting lamp of a plurality of LED and LGP to use.
Patent documentation 1: Japanese kokai publication hei 06-174929 communique
Patent documentation 2: TOHKEMY 2001-14919 communique
Patent documentation 3: international monopoly discloses brochure No. 2006/013969
Patent documentation 4: TOHKEMY 2007-59285 communique
Summary of the invention
By from the light of the light-emitting components such as side end face incident LED of LGP and in LGP, carry out leaded light, and shine from first type surface, thereby can construct the ligthing paraphernalia that can shine equably wide region.But, although in patent documentation 4, also be identical in the ligthing paraphernalia of record, but owing to be to make from the wide structure that vertically injects to interarea that causes of the ejaculation of LGP, therefore disposing abreast in the situation of LGP with the console table upper surface, become maximal illumination under the ligthing paraphernalia, have the Illumination Distribution that illumination reduces gradually with concentric circles.
For this reason, bright under the ligthing paraphernalia when ligthing paraphernalia of record is disposed at console table inboard in patent documentation 4, but the user's is dimmed easily on hand, can't obtain enough illumination.If will all will throw light on brightly on hand, then need to strengthen the interarea that penetrates illumination light or the luminous intensity that improves light-emitting component, can cause the maximization of device, the increase of power consumption.
In addition, even the rear side of the ligthing paraphernalia away from the user generally is not need to throw light on or dark also passable zone, therefore can cause waste to become greatly to the equal illumination light in such area illumination and field of illumination, be not to be preferred.
Direction that can be by changing LGP or make bend of light conducting plate adjust the direction of illumination of illumination light, if but so that illumination light is carried out angle adjustment towards the mode of front side, then when the user lifts face, the part of illumination light can directly enter user's eyes, causing feeling twinkling, is not to be preferred therefore.In addition, by tilting to make the distance on ligthing paraphernalia and the console table elongated, therefore be difficult to the front is also illuminated effectively.
The present invention In view of the foregoing makes, its purpose be to provide a kind of can to from the interarea of the ejaculation illumination light of LGP towards the different direction irradiation high light of direction lighting device and possess this lighting device and can be with low-power consumption and illumination lighting lamp on hand effectively.
Lighting device of the present invention is the lighting device that ligthing paraphernalia is used, and possesses: LGP, this LGP possess the 1st interarea and 2nd interarea relative with described the 1st interarea and in the upwardly extending side surface part in side of intersecting with described the 1st interarea and described the 2nd interarea; And the light source that extends at the length direction of described side surface part, described lighting device makes light that described light source penetrates in described the 1st interarea and the reflection of described the 2nd interarea and carries out leaded light and penetrate from described the 1st interarea in described LGP, wherein, be provided with light taking-up section at described the 1st interarea or described the 2nd interarea, this light taking-up section forms recessed or protruding repetitive construct at light conducting direction, make the optical path-deflecting in the described LGP and make the incidence angle towards described the 1st interarea become the angle less than the angle of total reflection, thereby take out light from described the 1st interarea, be formed with the recessed or protruding structure of described light taking-up section, with from the vertical line direction deflection predetermined angular of described the 1st interarea and irradiating illumination light, and the vertical line that makes described the 1st interarea and the maximum intensity direction angulation θ max that penetrates light satisfy 10 °＜θ max＜40 °.
According to this lighting device, the deflection predetermined angular comes irradiating illumination light by the light taking-up section that has recessed or protruding repetitive construct at light conducting direction, therefore can realize can to from the interarea institute of the ejaculation illumination light of LGP towards the different direction of direction shine the lighting device of high light.
Lighting lamp of the present invention is the lighting lamp that has used above-mentioned lighting device, possess pedestal section and support, in the front of described support described lighting device is installed, and the 1st interarea of described lighting device is configured in the situation parallel with illuminated, from the ejaculation light of described lighting device with to from the side that disposed described support away from the angle that tilted of direction penetrate.
According to this lighting lamp, by use can to from the 1st interarea institute of the ejaculation illumination light of LGP towards the different direction of direction shine the lighting device of high light, be configured in the situation parallel with illuminated at the 1st interarea with lighting device, even lighting device is set to the inboard in illuminated zone, the illuminated zone of side in front of also can throwing light on efficiently, but therefore can access low-power consumption and illumination ligthing paraphernalia on hand efficiently.
According to the present invention, can provide a kind of can to from the interarea of the ejaculation illumination light of LGP towards the different direction irradiation high light of direction lighting device and possess this lighting device and can low-power consumption and illumination lighting lamp on hand efficiently.
Description of drawings
Fig. 1 is the perspective cross-sectional slice of the summary of the expression lighting device relevant with the first embodiment.
Fig. 2 only takes out the part of LED 2 and LGP 1 and the amplification sectional view of the explanation usefulness that illustrates.
Fig. 3 only takes out the part of LED 2 and LGP 1 and the amplification sectional view of the explanation usefulness that illustrates.
Fig. 4 only takes out the part of LGP 1 of LED 2 and variation and the amplification sectional view of the explanation usefulness that illustrates.
Fig. 5 is the perspective cross-sectional slice of the LGP that possesses of the lighting device of presentation graphs 1.
Fig. 6 is the key diagram of maximum intensity illumination direction of light of the lighting device of expression the first embodiment.
Fig. 7 is the figure of angular characteristics of illumination light intensity of the lighting device of expression the first embodiment.
Fig. 8 is the summary description figure of the summary of the expression lighting lamp relevant with the present invention.
Fig. 9 is the summary top view of the Illumination Distribution of the plane of illumination due to the lighting lamp of presentation graphs 7.
Figure 10 is the curve map of illumination ratio of the plane of illumination of presentation graphs 9.
Figure 11 is the key diagram of wanting section's structure and maximum intensity illumination direction of light of the lighting device of expression comparative example.
Figure 12 is the figure of angular characteristics of illumination light intensity of the lighting device of expression Figure 11.
Figure 13 is the curve map of illumination ratio of the plane of illumination due to the lighting device of expression Figure 11.
Figure 14 is the key diagram of wanting section's structure and maximum intensity illumination direction of light of the lighting device of expression the second embodiment.
Figure 15 is the figure of angular characteristics of illumination light intensity of the lighting device of expression Figure 14.
Figure 16 is the curve map of illumination ratio of the plane of illumination due to the lighting device of expression Figure 14.
Figure 17 is the key diagram of wanting section's structure and maximum intensity illumination direction of light of the lighting device of expression the 3rd embodiment.
Figure 18 is the figure of angular characteristics of illumination light intensity of the lighting device of expression Figure 17.
Figure 19 is the curve map of illumination ratio of plane of illumination of the lighting device of expression Figure 17.
Figure 20 is the summary description figure of the summary of expression lighting lamp.
Figure 21 is the key diagram of the V groove structure that forms with the equidistant V groove that has disposed different in width of expression.
To be expression disposed the key diagram of the V groove structure that the V groove of different in width forms with different spacing to Figure 22.
Figure 23 is the summary description figure of the illumination light that penetrates via the V groove of expression.
Figure 24 is the key diagram of wanting section's structure of the lighting device of expression the 4th embodiment.
Figure 25 is the figure of angular characteristics of illumination light intensity of the lighting device of expression Figure 24.
Figure 26 is the curve map of illumination ratio of the plane of illumination due to the lighting device of expression Figure 24.
Figure 27 only takes out the part of LGP 1 of LED 2 and other variation and the amplification sectional view of the explanation usefulness that illustrates.
Figure 28 only takes out the part of LGP 1 of LED 2 and other variation and the amplification sectional view of the explanation usefulness that illustrates.
Figure 29 is the key diagram of Fresnel reflection (Fresnel reflection).
Figure 30 only takes out the part of LGP 1 of LED 2 and other variation and the amplification sectional view of the explanation usefulness that illustrates.
Figure 31 only takes out the part of LGP 1 of LED 2 and other variation and the amplification sectional view of the explanation usefulness that illustrates.
Figure 32 only takes out the part of LGP 1 of LED 2 and other variation and the amplification sectional view of the explanation usefulness that illustrates.
Figure 33 only takes out the part of LGP 1 of LED 2 and other variation and the amplification sectional view of the explanation usefulness that illustrates.
Figure 34 only takes out the part of LGP 1 of LED 2 and other variation and the amplification sectional view of the explanation usefulness that illustrates.
Figure 35 is the figure that the expression inventor is used for the model of research.
(a) ~ (c) of Figure 36 is the figure that the angular characteristics of illumination light intensity is shown for each condition in the model of Figure 35.
(a) ~ (c) of Figure 37 is the figure that the angular characteristics of illumination light intensity is shown for each condition in the model of Figure 35.
(a) ~ (c) of Figure 38 is the figure that the angular characteristics of illumination light intensity is shown for each condition in the model of Figure 35.
Figure 39 is that the lighting device of expression the 5th embodiment possesses and the perspective cross-sectional slice of preferred LGP.
Figure 40 is the figure that watches to the direction of having carried out cutting off with the V-V line in Fig. 1.
Figure 41 is the figure of Luminance Distribution that obtains the 1st interarea of the 5th embodiment by emulation, is to represent high-high brightness, represent the gray level of minimum brightness with black with white.
Figure 42 is the key diagram of maximum intensity illumination direction of light of the lighting device of expression the 5th embodiment.
Figure 43 is the perspective cross-sectional slice of the LGP of expression the 6th embodiment.
Figure 44 is the figure of Luminance Distribution that obtains the 1st interarea of the 6th embodiment by emulation, represents high-high brightness with white, represents minimum brightness with black.
Figure 45 is the figure of angular characteristics of illumination light intensity of the lighting device of expression the 6th embodiment.
Figure 46 is the perspective cross-sectional slice of the LGP of expression variation.
Figure 47 is the perspective cross-sectional slice of the LGP of other variation of expression.
Figure 48 is the perspective cross-sectional slice of the LGP of expression the 7th embodiment.
Figure 49 is the figure of Luminance Distribution that obtains the 1st interarea of the 7th embodiment by emulation, is to represent high-high brightness, represent the gray level of minimum brightness with black with white.
Figure 50 is the figure of angular characteristics of illumination light intensity of the lighting device of expression the 7th embodiment.
Figure 51 is the perspective cross-sectional slice of summary of the lighting device of the expression LGP that uses the 8th embodiment.
Figure 52 is the perspective cross-sectional slice of the LGP of expression the 8th embodiment.
Figure 53 is that a part with the LGP 1 relevant with the 8th embodiment is with the sectional view shown in the LED 2.
Figure 54 is the figure of brightness that obtains the 1st interarea of the 8th embodiment by emulation, is to represent high-high brightness, represent the gray level of minimum brightness with black with white.
Figure 55 is the figure of angular characteristics of illumination light intensity of the lighting device of expression the 8th embodiment.
Figure 56 takes out the figure shown in the LGP for the present invention is described.
(description of reference numerals)
1 ~ 1M: LGP; 2: light-emitting component (LED); 3: shell; 4: reflecting plate; 5: diffuser plate; 11: the 1 interareas; 12: the 2 interareas; 13: the plane of incidence; 14: end face; 15: light taking-up section; 16: the light beam branching portion; V1: the 1st inclined-plane; V2: the 2nd inclined-plane; DT1: three-dimensional diffusion point; U, U1, U2: lighting device; ST1, ST2: lighting lamp (ligthing paraphernalia).
The specific embodiment
Embodiments of the present invention are described with reference to the accompanying drawings.In addition, use identical mark for identical member of formation, and suitably omit detailed explanation.
The lighting device relevant with the first embodiment is to possess the lighting device U that the ligthing paraphernalia that carries out the luminous shadow surface of face is used, for example as shown in Figure 1, this lighting device U possesses: LGP 1, this LGP 1 possess and carry out luminous the 1st interarea (outgoing plane) 11 of face and and 2nd interarea (reflecting surface) 12 that abreast extend relative with the 1st interarea; And a plurality of light-emitting components 2, extend in the direction of intersecting with the 1st interarea 11 and the 2nd interarea 12, and relative with a side surface part (end face) of the plane of incidence 13 that becomes this LGP 1 and dispose, wherein, this lighting device U penetrates the photoconduction light that light-emitting component 2 penetrates to LGP 1 and from the 1st interarea 11.In addition, the 1st interarea (outgoing plane) 11 with the 2nd interarea (reflecting surface) even 12 be not fully parallel but from about parallel offset to 5 degree, can obtain same effect yet.That is, said in this specification " parallel " comprises that mutual inclination 5 degree are with interior situation.
LGP 1 is the writing board shape that the direction vertical with paper is made as length direction, constitutes so that the mode that the 1st interarea 11 exposes is contained in shell 3 integratedly with light-emitting component 2.
Light-emitting component 2 for example, can use the light source (cold-cathode tube) of wire, a plurality of point source of lights (LED) that dispose across the interval so long as the light source that penetrates illumination light to the direction of the plane of incidence 13 gets final product on the length direction of the plane of incidence 13.In addition, preferably use low-power consumption, luminous intensity high and send the LED of white light.For this reason, be located at and used White LED in the present embodiment.For this reason, replace later on light emitting source 2 and be made as LED 2 and describe.Roughly uniformly-spaced be arranged with a plurality of LED 2 on the length direction of the substrate 21 in being contained in shell 3 (direction vertical with paper) (for example, about 15mm spacing).
LED 2 is White LEDs, is to excite with blue led with by the light from blue led and the fluorophor (for example, yellow fluorophor) that sends the exciting light of provision wavelengths combines and sends the LED of white light.In addition, White LED also can use the high-color development LED that red LED, blue led, green LED has been carried out combination.By using high-color development LED, can realize being applicable to needing the lighting device of the purposes of high colorrendering quality.
Substrate 21 for example is made as the length of total length degree of the length direction of the plane of incidence 13, carries the LED 2 of a plurality of chip types in this substrate 21 with prescribed distance.Like this, substrate 21 becomes one in the longitudinal direction, is divided into a plurality of substrates and being electrically connected respectively but also can constitute.In addition, substrate 21 is connected with the power circuit that is disposed at the lighting device outside (not shown) by lead-in wire, can adjust the electric current that flows through LED by the brightness adjustment button that is arranged in the circuit, thereby adjusts the brightness of lighting device.
Fig. 2, Fig. 3 only take out the part of LED 2 and LGP 1 and the amplification sectional view of the explanation usefulness that illustrates.In Fig. 2, the plane of incidence 13 is V-shaped valley shapes, has thickness direction central authorities take LGP 1 and has carried out the 1st deflection plane 13a and the 2nd deflection plane 13b that tilt as the border in the mode near the outer circumferential side of LED 2.Therefore, the light that penetrates from the first half of LED 2 reflects among the 1st deflection plane 13a and towards the 2nd interarea 12, and the light that penetrates from the Lower Half of LED 2 reflects among the 2nd deflection plane 13b and towards the 1st interarea 11.Therefore the 1st deflection plane 13a and the 2nd deflection plane 13b of the plane of incidence 13 are symmetric shapes, cause by 2 towards the light of the 1st interarea 11 with towards the 2nd interarea 12 wide and cut apart, and the total reflection composition increases, so can obtain high taking-up efficient.
Here, the tiltangleθ of the 1st deflection plane 13a and the 2nd deflection plane 13b is preferably until 20 degree.When spending greater than 20 when tilting, the high-intensity light that penetrates from LED 2 can not become the total reflection composition but near the position ejaculation of LED2 etc. the 1st interarea 11 and the 2nd interarea 12, thereby light conductivity and light take out deterioration of efficiency.In addition, by making the 1st deflection plane 13a and the 2nd deflection plane 13b inclination 20 degree, thereby until carry out incident from LED 2 with the LOIHT that radiation angle 70 degree (cosine 0.34) penetrate, and Fresnel reflection becomes smaller under incidence angle 50 degree in the plane of incidence 13.
On the other hand, when considering from other viewpoint, the tiltangleθ of the 1st deflection plane 13a and the 2nd deflection plane 13b is preferably atan(t/(2L)) angle more than.Here, with reference to Fig. 5, light guide plate is made as t(mm), the distance till will be from the plane of incidence 13 to LGP 1 and end face plane of incidence opposition side is made as L(mm).In the situation of t=3, L=55, by being set as atan(t/(2L))=more than 1.5 degree, directly arrival disappears with the guiding light of the end face of the plane of incidence 13 opposition sides, high-strength light is directed into the light taking-up section 15 that takes out parts as light, therefore light can be in the outlet, taken out as far as possible, the loss of the absorption of leaded light due to coming and going, passage of scintillation light (Flare light) etc. can be prevented.
And, preferably incide the 1st interarea 11 and the 2nd interarea 12 of initial incident with the angle of total reflection from whole light beams (except edge diffraction light) of the 1st deflection plane 13a and the 2nd deflection plane 13b incident.Be that the tiltangleθ of the 1st deflection plane 13a and the 2nd deflection plane 13b=below 6 degree, whole incident beams of refraction carry out total reflection in the 1st interarea 11 and the 2nd interarea 12 in 1.5 the material situation about forming by refractive index at LGP 1.But as previously mentioned, the 1st deflection plane 13a and the 2nd deflection plane 13b tilt more than preferably spending with tiltangleθ=1.5.
The light that penetrates from LED 2 is from the plane of incidence 13 incidents and interior by leaded light at LGP 1.Namely be made as following structure: light between the lower surface (the 1st interarea 11) of LGP 1 and upper surface (the 2nd interarea) on one side by total reflection on one side by leaded light, incide light taking-up section 15 and the light that departs from from the angle of total reflection penetrates and to carry out face luminous from the 1st interarea 11.
In the present embodiment, light taking-up section 15 is carrying out face when luminous, can carry out to the vertical line with respect to the interarea (the 1st interarea 11) of the ejaculation illumination light of LGP 1 the direction irradiation high light that tilts.
More particularly, in the 1st interarea 11 or the 2nd interarea 12, light taking-up section 15 is set, via this light taking-up section 15 from the vertical line direction deflection predetermined angular of the 1st interarea 11 and irradiating illumination light.With reference to Fig. 6, the vertical line of the 1st interarea 11 and the maximum intensity direction angulation θ max that penetrates light preferably satisfy 10 °＜θ max＜40 ° as described later, and 15 °＜θ max＜35 ° more preferably.
Light taking-up section 15 shown in Figure 3 adopted be arranged at the 2nd interarea 12 at the upwardly extending a plurality of V grooves of paper Vertical Square.If this structure, then the 2nd interarea 12 at the opposition side relative with outgoing plane arranges light taking-up section 15, therefore can realize the homogenising of Illumination Distribution, can make the Illumination Distribution of outgoing plane position more even.
In addition, consist of the V1A(inclined plane, the 1st inclined-plane that the V groove of light taking-up section 15 has plane of incidence side) and form the 2nd inclined-plane V2A of described V groove with the 1st inclined-plane V1A, by changing the angle of inclination of the 1st inclined-plane V1A and the 2nd inclined-plane V2A, can adjust from the peak-peak intensity direction of light of the illumination light of the vertical line direction deflection predetermined angular θ max of the 1st interarea 11.
As modified embodiment of the present embodiment, as shown in Figure 4, can also adjust the angle of inclination of the 1st inclined-plane V1A and penetrate to the normal direction of the 1st interarea 11.More particularly, so that becoming the mode of the peak-peak intensity of illumination light, vertical direction sets the 1st inclined-plane V1A.Dotted line represents from the plane of incidence 13 incidents and is directly incident on the light path of the low intensive light of the 1st inclined-plane V1A in Fig. 4.About being directly incident on the light of the 1st inclined-plane V1A and since penetrate direction with carrying out total reflection wide not identical by leaded light, so make the efficient step-down.Be made as in the present embodiment the 1st deflection plane 13a and the 2nd deflection plane 13b that the plane of incidence 13 has been tilted, the light that therefore is directly incident on the 1st inclined-plane V1A becomes few.
In addition, the inclination angle of the 1st deflection plane 13a and the 2nd deflection plane 13b is preferably atan(t/(2M)) angle more than.Here, light guide plate is made as t(mm), the distance till will be from the plane of incidence (side surface part) 13 to the 1st initial inclined-plane V1A is made as M(mm).In the situation of t=3mm, M=10mm, by being set as atan(t/(2M))=more than 8.5 degree, the guiding light that directly arrives the 1st initial inclined-plane V1A disappears, and high-strength light is directed into the 1st inclined-plane V1A.Also consider in described leaded light total reflection composition and utilize high-strength light, in this variation, be set as 10 degree.
Here, LGP 1 is about more than 1.4 by refractive index and makes the transparent material that visible light sees through (for example refractive index is about 1.5 PMMA: acrylic acid (acrylic)) consist of, the light taking-up section 15 that both can append processing V groove shape forms, and also can be shaped integratedly.In addition, this LGP 1 is according to purposes, also can be beyond glass material, the PMMA acrylic acid, Merlon, have plastic silicone resin sheet etc.
By the transfer surface that makes the mould that LGP 1 is shaped is implemented face alligatoring processing, thereby make the 1st inclined-plane V1A become matsurface, can have diffusion effect as proliferation part.Diffusance on this light conducting direction is preferably 3 degree to 10 degree under intensity half value fabric width.In the large situation of the spacing of the orientation of LED, it also can be the diffusance anisotropy diffusingsurface that orientation has large diffusance according to LED that takes out the inclined-plane of parts as light.
By described proliferation part, the light that incides inclined-plane V1A is mixed and reduce that to penetrate light intensity inhomogeneous, thereby can realize uniform illumination.Here, as proliferation part, for example carry out transfer printing and be shaped by having improved the mould of surface roughness that the transfer surface of transfer printing is carried out on the inclined plane, thereby make the inclined plane become matsurface, perhaps the point source of lights such as LED are being disposed when a plurality of with discrete way, in the large situation of the spacing of the orientation of LED, it also can be the diffusance anisotropy diffusingsurface that orientation has large diffusance according to LED that takes out the inclined-plane of parts as light.The anisotropy diffusingsurface can be realized by surface relief hologram (Surface relief hologram) (with reference to the paragraph [0011] of TOHKEMY 2009-170430) or in the anisotropic scattering structure of jet face combination fine rule (Hairline) usefulness with isotropic scatterning.
The light beam that penetrates from LED 2 while carrying out total reflection by leaded light, reflects the light beam that spreads and depart from from the angle of total reflection and penetrates as illumination light from the 1st interarea 11 between the 1st interarea 11 and the 2nd interarea 12 by light taking-up section 15.Here, dispose reflecting plate 4 by the outside at the 2nd interarea 12, can reflect the light in the outside that is escaped to the 2nd interarea 12 by 15 deflections of light taking-up section so that again turn back in the LGP 1, can increase the illumination light intensity that penetrates from the 1st interarea 11, can realize high efficiency lighting device U.Although reflecting plate 4 is structure not necessarily, according to above-mentioned viewpoint, preferably at the outside of the 2nd interarea 12 configuration reflecting plate 4.
Reflecting plate 4 can use to its inner face implement mirror process or pasted mirror film (Mirror Film) resin plate, have that the white reflection of having implemented white covering with paint is processed or the aluminium metal sheet of the reflecting surface of mirror process etc.In addition, both the inner face of accommodating the shell 3 of LGP 1 for example can have been formed the aluminum metallic plate had been implemented the white reflection processing of white covering with paint or the reflecting surface of mirror process, also can be made as the REF-WHITE(レ Off ホ ワ イ ト that uses reflective film (for example, KIMOTO(I も と) company to produce)) structure.
In addition, dispose diffuser plate 5 in the outside of the 1st interarea 11.If this structure, even then light taking-up section 15 is made of a plurality of V grooves of discretely configuration, also can reduce the uneven illumination even (brightness irregularities) of the illumination light in the outgoing plane (the 1st interarea 11), thereby realize evenly and for the soft high-quality lighting device U of eyes.Diffuser plate 5 can use in the past known resin diffuser plate, the resin diffusion film with light transmission.Although diffuser plate 5 is structure not necessarily, according to above-mentioned viewpoint, preferably at the outside of the 1st interarea 11 configuration diffuser plate 5.
Then, use Fig. 5 to further specify LGP 1A.
LGP 1A shown in Figure 5 is the parts that the lighting device U1 of the first embodiment shown in Figure 6 possesses, be that the transparent body, for example refractive index more than 1 is about 1.5 PMMA and consists of by refractive index, length L is 50mm, and thickness t is 3mm, and width (direction vertical with paper) is 200mm.
Will as the light in the light conducting direction between recessed or protruding structure take out parts the inclined plane largest interval (namely, joint face and planar portions sum) be made as Pmax(mm), when the half value fabric width of the angle of flare of the light that will penetrate from the inclined plane is made as σ (°), the distance of inclined plane and the diffuser plate adjacent with outgoing plane is made as t(mm), LGP 1A preferably satisfies following formula.
t sinσ<Pmax<t sinσ+0.7 （1）
The meaning of above-mentioned formula (1) is described with reference to Figure 56.As recessed or protruding structure, consider the V groove that is consisted of by the 1st inclined-plane V1A and the 2nd inclined-plane V2A.Here, the thickness t (mm) that the distance of the 1st inclined-plane V1A and the diffuser plate adjacent with outgoing plane is treated to LGP 1 is similar to.If be t(mm by being arranged at thickness) LGP on the light of the 1st inclined-plane V1A reflection spread with diffusance σ, then when penetrating from outgoing plane, have the scope of t sin σ at light conducting direction.Therefore, if the ultimate range Pmax on the light conducting direction of V groove less than t sin σ, then outgoing plane is whole can be luminous.On the other hand, even the ultimate range Pmax on the light conducting direction of V groove is more than the t sin σ, the user sometimes also can imperceptible inharmonious sense.Such situation is described.If the ultimate range Pmax on the light conducting direction of V groove is greater than t sin σ, the light that then penetrates from each the 1st inclined-plane V1A can not intersect before penetrating from outgoing plane, therefore the low regional BK of brightness occurred at outgoing plane.Here, if dispose discretely a plurality of V grooves on light conducting direction, then the low regional BK of brightness is revealed as the strip pattern of striated.
Here, when eyesight is that 0.5 people is when watching outgoing plane from the position of leaving 400mm with the angle more than 70 degree, if the scope of the regional BK that brightness is low is the scope of angle 2 ', then be difficult to identify strip pattern, so the allowed band of the low regional BK of brightness becomes 400sin2 '/cos75 °=0.7mm.Therefore, if the ultimate range Pmax on the light conducting direction between recessed or protruding structure is less than (t sin σ+0.7), even then observe with the angle more than 75 degree from the normal direction of outgoing plane, be not difficult to observe yet and taken out the part (strip pattern) that parts take out light by light, therefore so the face that is identified as thus is luminous, feel that the worry of dazzling (the dazzling) that caused by brightness irregularities is few.
Getting back to Fig. 5 describes.Be in the situation on plane at the plane of incidence 13, from light straight ahead in LGP that LED 2 vertically penetrates, the Efficiency Decreasing that therefore takes out as illumination light from the 1st interarea 11.
Being formed with the cross section as light taking-up section 15 in the upper surface (the 2nd interarea 12) of LGP 1A is triangular shaped a plurality of V grooves.Like this, be set to the face relative with outgoing plane (the 1st interarea 11) by light being taken out section 15, can make the Illumination Distribution homogenising in the outgoing plane.Particularly, the distinctive dazzling sense of V groove can be relaxed, the high-quality illumination soft to eyes can be realized.
The V groove has the 1st inclined-plane V1(V1A of plane of incidence side) and form the 2nd inclined-plane V2(V2A of V groove with the 1st inclined-plane V1), its width LV is 1mm, the vertical line angulation θ 1A of the 1st inclined-plane V1 and the 2nd interarea 12 is 60 °, and the vertical line angulation θ 2A of the 2nd inclined-plane V2 and the 2nd interarea 12 is 30 °.
The width LV of V groove is preferably the little (LV＜t) of thickness t than LGP 1A.If LV is excessive, the light quantity that is then penetrated outside LGP by a V groove inclined-plane reflection becomes large, produces easily the brightness irregularities of illumination light.For this reason, in the present embodiment, be 3mm for the thickness t of LGP 1A, and the width LV of V groove is made as 1mm.
The disposition interval P of V groove namely, uprises configuration density along with diminishing gradually away from light source side.In the present embodiment, dispose as follows this spacing: establish maximum spacing P1=3.5mm, and until the about 1mm of P2 ~ Pn() till diminish gradually.Like this, along with density is uprised, can make thus the Luminance Distribution in the outgoing plane of lighting device further even.
The vertical line angulation θ 1(θ 1A of the 1st inclined-plane V1 and the 2nd interarea 12) is preferably 1＜75 ° of satisfied 50 °＜θ.When satisfying this condition, can be via with than 45 ° of the 1st inclined-plane V1 of having tilted of large angle θ 1 also, effectively penetrate illumination light from the 1st interarea 11 to the direction that has tilted.In addition, among the light of the plane of incidence 13 incidents, thereby before arriving relative end face 14, can satisfy 15 °＜θ max＜35 ° by the vertical line of the 1st inclined-plane V1 reflection the 1st interarea 11 and the maximum intensity direction angulation θ max that penetrates light.
If the vertical line of the 1st interarea 11 and the maximum intensity direction angulation θ max that penetrates light satisfy the structure of 15 °＜θ max＜35 °, even if then make the 1st interarea 11 with illuminated (for example, the console table upper surface) parallel (level), the illuminated zone of also can throwing light on brightly in a wide range.In addition, can directly not enter observer's eyes from the high intensity illumination light of lighting device, so the user can not feel twinkling, can clearly observe illuminated body.
In addition, the 1st inclined-plane V1 and the 2nd inclined-plane V2 angulation, be that θ 1+ θ 2 is preferably and satisfies 2＜110 ° of 80 °＜θ 1+ θ.If this structure, following light is penetrated to the direction that has tilted from the 1st interarea 11 effectively via the 2nd inclined-plane V2, wherein, this light is: thus again incide light in the LGP from the plane of incidence 13 incidents and leaded light arrives the end face 14 relative with the plane of incidence 13 in LGP 1A light by this end face 14 or the reflecting surface reflection that is arranged at the outside.
Namely, satisfy in the situation of 2＜110 ° of 80 °＜θ 1+ θ at the 1st inclined-plane V1 and the 2nd inclined-plane V2 angulation θ 1+ θ 2, can make from the plane of incidence incide in the LGP and in LGP leaded light and the light that arrives relative end face 14 and be reflected, effectively to θ max〉0 direction penetrates, namely to penetrating towards the direction that the user has rolled tiltedly from the vertical line direction of lighting device.
For example as shown in Figure 6, possesses the lighting device U1 of the first embodiment of this LGP 1A to the direction of the θ max shown in the figure, namely to penetrating maximum intensity light from the vertical line direction of lighting device towards the direction that the user has rolled tiltedly.
In addition, the angular characteristics of the illumination light intensity of the lighting device U1 of this first embodiment shown in Fig. 7.Xz cross section shown in the figure be equivalent to by the center of lighting device U1 shown in Figure 6 the face parallel with paper, namely be equivalent to the face up and down of the lighting space from outgoing plane to the console table upper surface, the yz cross section shown in the figure is equivalent to the face parallel with the width of lighting device U1 (with the vertical direction of paper).
The angular characteristics of illumination light intensity shown in Figure 7 is based on the result of calculation of emulation, but by the 2nd interarea 12 at LGP 1A the light taking-up 15A of section that the V groove by the regulation shape consists of is set, thereby shown in the illumination light intensity RA in xz cross section, the right direction illustrating from the vertical line direction of lighting device U1 to figure, the illumination light that has namely rolled tiltedly predetermined angular to the user distribute.In addition, shown in the illumination light intensity RB in yz cross section, be that the illumination light that roughly changes equably distributes in the yz cross-wise direction as can be known.
The maximum intensity direction angulation θ max of ejaculation light in this case is approximately 22.5 °.Namely, be that the vertical line angulation θ 2 of 60 °, the 2nd inclined-plane V2 and the 2nd interarea 12 is the light taking-up section 15 that 30 ° V groove consists of by vertical line angulation θ 1 by the 1st inclined-plane V1 and the 2nd interarea 12 is set, can realize representing having rolled tiltedly the 22.5 photodistributed lighting device U1 of illumination that spend to the user.
At the plane of incidence 13 of LGP 1A with become in the face beyond the 1st interarea 11 of outgoing plane, closely disposed with each face and to have had the high reflecting plate of diffusion property and reflectivity.As this reflecting plate, such as the reflective films such as REF-WHITE that can use KIMOTO company to produce.
In addition, at the downside of LGP 1A, (for example, about 0.5mm) disposed diffuser plate 5 across air layer.By configuration diffuser plate 5, can reduce even, the brightness irregularities of uneven illumination in the outgoing plane of lighting device U1.Particularly can suppress the distinctive dazzling sense of V groove and realize the high-quality lighting device soft to eyes.
The V groove that consists of the light taking-up 15A of section is not set in the predetermined distance from the plane of incidence 13.For example, at the about 5mm of non-configuring area La(shown in Figure 5) in the V groove is not set, and the V groove only is set in configuring area Lb.That is, this configuring area Lb becomes light taking-up section section is set.If the V groove is set near the plane of incidence, then the LED 2 as point source of light is disposed discretely, so incident light was reflected before mixing, and produces bright line and produce inhomogeneous in Luminance Distribution near the plane of incidence of lighting device.Therefore, non-configuring area La is set, after incident light is overlapping each other, makes light path carry out deflection.
In addition, the V groove that consists of the light taking-up 15A of section is configured to along with reducing gradually its disposition interval away from light source side, namely improving density of setting.In the present embodiment, being configured to its spacing diminishes gradually according to 3.5mm ~ 1mm.Like this, along with improve density away from light source, can make thus the Luminance Distribution in the outgoing plane of lighting device more even.
The ligthing paraphernalia of the illuminating lamp that the lighting device U1 of this first embodiment can preferably be applicable to use in the pond, lighting lamp etc.For this reason, use Fig. 8 ~ Figure 10 illustrates the lighting lamp as the ligthing paraphernalia of the lighting device U1 that possesses this first embodiment.In addition, lighting device of the present invention can also be applied to be arranged at metope and be thrown light in the underfooting of throwing light in ground.
Lighting lamp ST1 shown in Figure 8 is the ligthing paraphernalia that has used above-mentioned lighting device U1.In addition, possess pedestal section 31 and support 32, in the front of this support 32 lighting device U1 is installed, the 1st luminous interarea 11 of face that carries out of this lighting device U1 is arranged to and illuminated (console table upper surface) almost parallel.
About lighting device U1, as previously mentioned, the illumination light that becomes maximum intensity towards the positions that the user has rolled tiltedly 22.5 degree is shown distributes, therefore penetrate the maximum intensity illumination light towards shown in the angle θ max among the figure, rolling about 22.5 ° direction oblique to user (observer 40) like that.In addition, the reverberation RF from 30 reflections of console table upper surface enters observer 40 eyes.
When the distance H of the 1st interarea 11 establishing this lighting device U1 shown in Figure 9 and console table upper surface is 400mm the Illumination Distribution in the console table upper surface is carried out patterned situation, the illumination to this moment shown in Figure 10 is than the situation of march line chart.
Carry out shading display as shown in Figure 9 such as the degree to brightness, near illumination under the lighting device U1 of lighting lamp ST1 is high.In addition, have in front of the Illumination Distribution of the illumination of side (x axle+side) asymmetric higher than console table inboard (x axle-side).
That is, even thereby the inboard that lighting lamp ST1 is disposed on the console table disposes the outgoing plane (the 1st interarea 11) of lighting device U1 abreast with respect to the console table upper surface, and the maximum intensity illumination light also rolls tiltedly to observer 40, therefore can throw light on hand enough brightly.
For example, from the curve map of the illumination ratio of the expression plane of illumination of Figure 10 as can be known, about the illumination Rx on the x axle, in front side illumination than high, in inboard illumination than low.In this curve map, under the lighting device as initial point will be on the x axle of the plane of illumination (console table upper surface) of the below of lighting device 400mm and the Illumination Distribution on the y axle carried out curve map.In addition, Illumination Distribution represents the maximal illumination in illuminated being made as 1 and carry out the value that standardization obtains.
The Illumination Distribution of illumination Ry on the y axle is roughly symmetrical with respect to initial point, but the Illumination Distribution of the illumination Rx on the x axle is asymmetrical, as can be known x for the zone of (+) just be observer's side the zone, with x for the zone of bearing (-) is that the rear side of lighting lamp ST1 is compared, thrown light on more brightly.
For example, the illumination on the x axle is to be x=350mm in the positive zone than becoming 1/2 point at x, but is x=-230mm at x in for negative zone.
Thereby, by using the lighting device relevant with present embodiment, the high efficiency ligthing paraphernalia that can realize illuminating in a wide range illuminated zone and the useless illumination light towards the zone that does not need to throw light on is reduced.
For example, satisfy 15 °＜θ max＜35 ° by the direction that makes the maximum intensity that penetrates light, thereby make the normal reflection light in the sightingpiston of maximum intensity light reflex to user (observer) side, so the observer can more clearly observe.Even sightingpiston is diffusingsurface, because it is more to observe the light intensity center of gravity situation consistent with the normal reflection direction, so sightingpiston is also effective when being diffusingsurface.
Then, use Figure 11 ~ Figure 13 explanation to have the structure example on inclined-plane of the angular range that is not regulation at the V groove of the 2nd interarea setting of LGP.
LGP 1B shown in Figure 11 is provided with the light taking-up 15B of section, and this light taking-up 15B of section is that the vertical line angulation θ 2B of 45 °, the 2nd inclined-plane V2B and the 2nd interarea 12 is that 45 ° V groove consists of by the vertical line angulation θ 1B of the 1st inclined-plane V1B and the 2nd interarea 12.That is, θ 1B is the example that does not satisfy 1＜75 ° of 50 °＜θ.
As an example, because 2B=45 ° of θ 1B=θ, the V groove that therefore arranges at the 2nd interarea 12 of LGP 1B is left-right symmetry with respect to the vertical line of the 2nd interarea 12, and the 1st inclined-plane V1B and the 2nd inclined-plane V2B angulation θ 1B+ θ 2B are 90 °.In addition, the thickness t of LGP 1B is 3mm, and the width LV of V groove is 1mm.
In this case, the maximum intensity direction angulation θ max that penetrates light is 0 °, and the vertical line direction of the 1st interarea 11 becomes maximum intensity as can be known.
In addition, from the curve map of the illumination ratio of the angular characteristics of the illumination light intensity of the lighting device that possesses LGP 1B shown in Figure 12, expression plane of illumination shown in Figure 13 as can be known, the intensity distribution of illumination light is consistent for all directions, roughly become lambert's illumination, but in the xz cross section, some x are the intensity grow in positive zone.
This is owing to inciding from the plane of incidence in the LGP and towards the light beam of relative end face, be reflected and towards the stronger intensity difference that causes of light beam phase specific strength of plane of incidence side, be not the direction irradiation high light to regulation at end face with the light beam that penetrates by optical path-deflecting and from outgoing plane on V groove inclined-plane.
In a word, in the lighting device of the LGP 1B of the structure example on the inclined-plane of the angular range that has used the V groove that consists of light taking-up section 15 to have not to be regulation, can't throw light on to observer's side on hand efficiently.
Then, use Figure 14 ~ Figure 16 illustrates that the V groove in the 2nd interarea setting of LGP has second embodiment on the inclined-plane in the angular range that is in regulation.In the lighting device of this second embodiment, this point that replaces with LGP 1C at the LGP 1A with the lighting device U1 of described the first embodiment is different, and other structure is identical.For this reason, the section's structure of wanting as lighting device only shows LGP 1C in Figure 14.
As shown in figure 14, the LGP 1C that the lighting device of the second embodiment possesses is provided with the light taking-up 15C of section, and this light taking-up 15C of section is that the vertical line angulation θ 2C of 74.5 °, the 2nd inclined-plane V2C and the 2nd interarea 12 is that 30 ° V groove consists of by the vertical line angulation θ 1C of the 1st inclined-plane V1C and the 2nd interarea 12.
That is, as an example, the V groove that arranges at the 2nd interarea 12 of LGP 1C is asymmetric with respect to the vertical line of the 2nd interarea 12, and the 1st inclined-plane V1C and the 2nd inclined-plane V2C angulation θ 1C+ θ 2C are 104.5 °.In addition, the thickness t of LGP 1C is 3mm, and the width LV of V groove is 1mm.
In this case, the maximum intensity direction angulation θ max that penetrates light is 15 °, becomes maximum intensity from the vertical line direction of the 1st interarea 11 towards tilted 15 ° direction of front side (observer's side) as can be known.
In addition, from the angular characteristics of illumination light intensity shown in Figure 15 as can be known, penetrate light intensity constant in the scope of θ=0 ° ~ 45 °, direction can realize roughly uniform intensity angular characteristics towards direction on hand under the lighting device.
In addition, as from the illumination of plane of illumination shown in Figure 16 (console table upper surface) than as can be known, used that Illumination Distribution also uprises in the scope of the 300 ~ 500mm of lighting device on the x axle of this LGP 1C.That is, as can be known by the lighting device that uses θ max to be about 15 ° (are equivalent to 10 °＜θ max＜40 °) can throw light on more brightly to the observer on hand.
Then, use Figure 17 ~ Figure 19 illustrates that the V groove in the 2nd interarea setting of LGP has the 3rd embodiment on the inclined-plane in the angular range that is in regulation.In the lighting device of the 3rd embodiment, also just replace with difference on this aspect of LGP 1D at the LGP 1A of lighting device U1 that will described the first embodiment, so the section's structure of wanting as lighting device only shows LGP 1D in Figure 17.
As shown in figure 17, the LGP 1D that the lighting device of the 3rd embodiment possesses is provided with the light taking-up 15D of section, and this light taking-up 15D of section is that the vertical line angulation θ 2D of 55 °, the 2nd inclined-plane V2D and the 2nd interarea 12 is that 35 ° V groove consists of by the vertical line angulation θ 1D of the 1st inclined-plane V1D and the 2nd interarea 12.
That is, as an example, the V groove that arranges at the 2nd interarea 12 of LGP 1D is asymmetric with respect to the vertical line of the 2nd interarea 12, and the 1st inclined-plane V1D and the 2nd inclined-plane V2D angulation θ 1D+ θ 2D are 90 °.In addition, the thickness t of LGP 1D is 3mm, and the width LV of V groove is 1mm.
In this case, the maximum intensity direction angulation θ max that penetrates light is 17 °, becomes maximum intensity from the vertical line direction of the 1st interarea 11 towards tilted 17 ° direction of front side (observer's side) as can be known.
In addition, from the angular characteristics of illumination light intensity shown in Figure 180 as can be known, penetrate light intensity grow in the scope of θ=5 ° ~ 25 °, direction can realize the high intensity illumination zone towards direction on hand under the lighting device.
In addition, than as can be known, used that Illumination Distribution also uprises in the scope of the 0 ~ 300mm of lighting device on the x axle of this LGP 1D from the illumination of plane of illumination shown in Figure 19 (console table upper surface).That is, illumination observation person's front side on hand more brightly as can be known.
In the situation that the lighting device relevant with the first ~ the 3rd embodiment used as lighting lamp, preferably make the light from the desk lamp light source can directly not enter observer's eyes.Therefore, when the observer observes via the light taking-up 15(15A of section, 15C, 15D) and the maximum intensity of deflection is shone light when the reverberation of console table upper surface reflection, confirms the only no observer's of entering of desk lamp light source eyes with Figure 20.
Lighting lamp ST2 shown in Figure 20 is the ligthing paraphernalia that has used the lighting device relevant with present embodiment.In addition, possess pedestal section 31 and support 32, in the front of this support 32 lighting device U(U1 be installed), with this lighting device U(U1) the 1st luminous interarea 11 of face that carries out be arranged to use with this illuminated area almost parallel.
About lighting device U(U1), as previously mentioned, the illumination light that has rolled tiltedly predetermined angular (0 ~ 40 degree) to the user is shown distributes, therefore penetrate the illumination light of maximum intensity to the direction that has rolled towards user (observer 40) predetermined angular shown in the angle θ max among the figure oblique.In addition, observer 40 observes from the reverberation RF of console table upper surface 30 reflections.
Here, usually about the field-of-view angle of people's above-below direction, the field-of-view angle VA1 of upside is that 50 °, the field-of-view angle VA2 of downside are about 75 ° by and large, therefore as shown in the figure, the observer's who reverberation RF is observed field range becomes from reverberation RF and upwards rolls 50 ° upper limit visual field AL1 and the zone that has rolled oblique downwards between 75 ° the lower limit visual field AL2 oblique.
In addition, if come since height that console table upper surface 30 leaves be H=400mm and with the lighting device U(U1 of console table upper surface 30 almost parallel ground setting) direct light RL depart from from this upper limit visual field VL1, then can not enter observer 40 eyes.
For example, be that upper limit visual field VL1 becomes the approximate horizontal angle, becomes the angle of the eyes that enter to greatest extent observer 40 from the direct light RL of lighting device U in 40 ° the situation at angle θ max.That is, if θ max less than 40 °, then can not enter observer 40 eyes from the direct light RL of lighting device U.In addition, observer 40 the head θ max that can not run into the required angle of minimum of lighting device is about 10 °.That is, if 10 °＜θ is max, then observer 40 can not feel that lighting device runs into first-class discomfort, can clearly observe illuminated area.
For this reason, in the situation that the lighting device relevant with present embodiment used as lighting lamp, the vertical line of the 1st interarea of LGP and the maximum intensity direction angulation θ max that penetrates light preferably satisfy 10 °＜θ max＜40 ° (more preferably satisfy as described above 15 °＜θ max＜35 °).
In addition, the V groove that is arranged at LGP as light taking-up parts is configured in the 2nd interarea 12 with prescribed distance, if therefore the spacing between the V groove is wide, the uneven illumination that then can produce the strip in the outgoing plane is even.For this reason, the even uniformly V separation that becomes roughly of the uneven illumination of the strip in the outgoing plane of lighting device (outermost, be diffusingsurface) preferably, and be the V groove shape.For this reason, use Figure 21 ~ Figure 23 explanation can reduce the V groove structure that uneven illumination in the outgoing plane is spared the regulation of throwing light on equably.
In LGP 1Ea shown in Figure 21, be made as that the uneven illumination of the strip in the outgoing plane that makes lighting device is even for example to become roughly fixing uniformly V separation P(, 1mm), little by little widen the width of the similar V groove of cross sectional shape, make the occupation density (configuration density) of V groove along with become large away from light source.
The shape of V groove is identical with the LGP 1A shown in the front, and the vertical line angulation θ 1A of the 1st inclined-plane V1 and the 2nd interarea 12 is that the vertical line angulation θ 2A of 60 °, the 2nd inclined-plane V2 and the 2nd interarea 12 is 30 °.In addition, the thickness t of LGP 1Ea is 3mm, and is relative therewith, and about the width LV of V groove, its minimum widith LV1 is that 0.2mm and Breadth Maximum LVn are 1mm.
As mentioned above, be made as θ 1A=60 °, θ 2A=30 °, the maximum intensity direction angulation θ max that therefore penetrates light is about 22.5 °.In addition, leave 0.5mm and diffuser plate is set from outgoing plane.By using the LGP 1Ea of this structure, can realize that uneven illumination in the outgoing plane of lighting device is even little and make and penetrate the tilted lighting device of predetermined angular of luminous intensity maximum angle.
In LGP 1Eb shown in Figure 22, be made as even the becoming below the V separation P that roughly fixes uniformly of uneven illumination of the strip in the outgoing plane that makes lighting device, little by little widen the width of the similar V groove of cross sectional shape, make the occupation density (configuration density) of V groove along with become large away from light source.
In addition, the shape of V groove is identical with LGP 1A, the 1Ea shown in the front, and θ 1A is 60 °, and θ 2A is 30 °.In addition, the thickness t of LGP 1Eb is 3mm, and is relative therewith, and about the width LV of V groove, establishing its Breadth Maximum LVn is that 0.6mm, its minimum widith LV1 are 0.2mm.In addition, about the V separation, be made as P1=1.0mm, Pn=0.6mm.
Also be made as θ 1A=60 °, θ 2A=30 ° in this structure, the maximum intensity direction angulation θ max that therefore penetrates light is about 22.5 °.In addition, leave 0.5mm and diffuser plate is set from outgoing plane.By using the LGP 1Eb of this structure, can realize making uneven illumination in the outgoing plane of lighting device even little and make and penetrate the tilted lighting device of predetermined angular of luminous intensity maximum angle.And, compare with the situation that spacing is fixing, can further change the area density of V groove, therefore can realize more uniform lighting device.
Then, use Figure 23 that the even contrast of uneven illumination of the strip in the outgoing plane of spacing between the V groove and lighting device is described.In this Figure 23, represent the V groove that arranges via the 2nd interarea 12 at LGP 1Ec and the illumination light that penetrates with thin solid line.In addition, the downside at the 1st interarea 11 separates predetermined distance and disposes diffuser plate 5.
The lighting device relevant with present embodiment takes out most light in the inclined plane of the V groove that has tilted to light source side.On the other hand, the light that the part beyond the inclined-plane that has tilted to light source side penetrates outgoing plane is less, and the outgoing plane that therefore lighting device occurs is seen as the situation of strip.If the spacing between the V groove is wide, then the even contrast of the uneven illumination of the strip in the outgoing plane (perhaps diffuser plate face) becomes large.Diffuser plate from outgoing plane more away from, diffusion effect is higher, but owing to cause maximizing and not preferred.
Lb shown in the figure is the non-ejaculation zone that does not mainly generate from the light of outgoing plane ejaculation.For this reason, can be for this non-width Lb and ejaculation luminous intensity maximum angle θ max that penetrates the zone, conditional according to the rules decides the allocation position of diffuser plate, realizes illumination small-sized and that outgoing plane can not dazzle.
For example, be configured to when the standoff distance from the 2nd interarea 12 that the V groove is set to diffuser plate 5 is made as air scaled distance d, satisfy formula (1).
D=Lb/sin θ max ... formula (1)
That is, in the time of Lb=0.7mm, θ max=20 °, become d=2mm, therefore consider LGP thickness, diffuser plate thickness and disposed diffuser plate 5 at the position that becomes about 2mm according to the air scaled distance.
By being made as aforesaid structure, arrange at diffuser plate from the light on the inclined plane of adjacent V groove, so the light of strip is dispersed and penetrates, can be implemented in the lighting device of uniform-illumination in the outgoing plane.
In addition, the light that is arranged at LGP take out parts except the V groove can also with spread point, for example lentiform three-dimensional diffusion is put to form.For this reason, use Figure 24 ~ Figure 27 explanation to form the 4th embodiment that light takes out parts by the three-dimensional diffusion point.In the lighting device of the 4th embodiment, also just replace with difference on this aspect of the LGP 1F that possesses three-dimensional diffusion point (salient point) DT1 at the LGP 1A of lighting device U1 that will described the first embodiment, so the section's structure of wanting as lighting device only shows LGP 1F in Figure 24.
LGP 1F shown in Figure 24 has disposed a plurality of three-dimensional diffusion point DT1 at the 2nd interarea 12 of upper surface with prescribed distance.In addition, this three-dimensional diffusion point DT1 for example has following shape: with the plane of the 2nd main surface parallel will be so that long limit be the shape that oval ball that-0.56 ellipsoid of revolution tilts to obtain has carried out cut-out with light conducting direction is consistent and make major diameter Ld1=0.5mm, minor axis Ld2=0.3mm, circular cone coefficient to the mode of 20 ° of light conducting direction rotations.
For example by the UV cured resin is sprayed to optional position on the LGP from nozzle, and irradiation ultraviolet radiation solidifies it, can make such off-centre thus three-dimensional diffusion point DT1.Repeatedly spray overlappingly a point and make its curing by one side controlled quentity controlled variable one side staggered positions, can make eccentric shape thus.In addition, also can make by being shaped integratedly with LGP.
Have eccentric gradient by the cross section that makes three-dimensional diffusion point DT1, can be controlled at towards incline direction that total reflection is carried out on diffusion point surface and the ejaculation angle of the illumination light that penetrates from the 1st interarea.
In addition, three-dimensional diffusion point DT1 is configured to make mutual interval along with diminishing away from the plane of incidence, being that density uprises gradually.By controlling the configuration of this three-dimensional diffusion point DT1, can be implemented in the high-quality lighting device that outgoing plane has uniform Luminance Distribution.
In addition, Figure 25 illustrates the angular characteristics of the illumination light intensity of the lighting device that possesses the LGP 1F that has formed three-dimensional diffusion point DT1, and Figure 26 illustrates the illumination ratio of plane of illumination (console table upper surface).In this structure, about θ max=25 °, efficiently the positive region (observer's side) of x axle is thrown light in a wide range as can be known.
In Figure 27, in LGP 1F, carry out leaded light, so that reflect among the 1st deflection plane 13a, the light that penetrates from the first half of LED 2 towards the 2nd interarea 12, makes from the light of the Lower Half ejaculation of LED 2 among the 2nd deflection plane 13b, to reflect and towards the 1st interarea 11.The light of institute's leaded light reflects at its sphere or aspheric surface after inciding three-dimensional diffusion point DT1, incides the 1st interarea 11 sides with the invalid state of total reflection condition, therefore penetrates through it.
As mentioned above, even possess the LGP 1F of the light taking-up 15F of section of the lentiform three-dimensional diffusion point DT1 that has formed to prescribed direction off-centre, also can be created on from the offset from vertical predetermined angular of the 1st interarea and the direction that tilted has the illumination light of maximum intensity.
Namely, no matter be the light taking-up 15(15A of section, 15C, the 15D that possesses the V groove on a plurality of the 1st inclined-planes with different angles of inclination and the 2nd inclined-plane), still the light taking-up 15F of section that possesses a plurality of three-dimensional diffusion point DT1 can both be created on from the offset from vertical predetermined angular of the 1st interarea and the direction that tilted has the illumination light of maximum intensity.
Figure 28 is the sectional view that the related LGP of other variation 1 is shown with LED 2.In the present embodiment, on the 2nd interarea 12, described plane some IJ of 0.1mm diameter degree by ink-jet.Be 1.5 LGP 1 for refractive index, at 1st interarea 11 and 2nd interarea 12 carry out total reflection and on one side carry out leaded light on one side, so angle of reflection is that the direct light energy of 42 degree ~ 83 degree enough will be lost and be suppressed lowly.On the other hand, angle of reflection is that the guiding of 83 degree ~ 90 degree has only been carried out the light source Zhou Bianguang of refraction, the diffraction light due to the plane of incidence edge by the plane of incidence, therefore becomes low-intensity.And, do not carry out the low intensive light that the guiding of total reflection is only penetrated from light source to periphery with angle of reflection 38 degree ~ 42 degree, and carry out Fresnel reflection at the plane of incidence, be low-intensity (with reference to the curve map of Figure 29) therefore.That is, by total reflection high-intensity light being carried out leaded light, is high efficiency therefore.
In Figure 28, in LGP 1, carry out leaded light,, and make from the light of the Lower Half ejaculation of LED 2 and among the 2nd deflection plane 13b, reflect and towards the 1st interarea 11 towards the 2nd interarea 12 so that the light that penetrates from the first half of LED 2 reflect among the 1st deflection plane 13a.In the 2nd interarea 12, be formed with the diffusion point IJ that makes the light diffusion.Diffusion point IJ for example is that diameter is the circle of 1mm, and disposes with spacing 1.5～2mm.Size, shape, the spacing of diffusion point IJ are not limited to this, distribute as long as set the brightness, the light that satisfy regulation for.In addition, the diffusion point also comprises the diffusion part of wire.The light of institute's leaded light carries out scattered reflection after inciding diffusion point IJ, incides the 1st interarea 11 sides with the invalid state of total reflection condition, therefore penetrates through it.Can make the light changes in distribution by the diffusance that changes diffusion point IJ.If diffusance is diminished, then can make the angle that penetrates from the 1st interarea 11 become large.
Figure 30 is the sectional view that the related LGP of other variation 1 is shown with LED 2.In this variation, the plane of incidence 13 is carried out 2 cut apart, the first half is made as the 1st Fresnel Lenses face (the 1st deflection plane) 13c, the latter half is made as the 2nd Fresnel Lenses face (the 2nd deflection plane) 13d.In addition structure is identical with above-mentioned embodiment.
In Figure 30, in LGP 1, carry out leaded light, so that reflect among the 1st Fresnel Lenses face 13c, the light that penetrates from the first half of LED 2 towards the 2nd interarea 12, makes from the light of the Lower Half ejaculation of LED2 among the 2nd Fresnel Lenses face 13d, to reflect and towards the 1st interarea 11.Like this, thereby the plane of incidence 13 is divided into the Fresnel Lenses shape is divided into two light beams, and so that more change the inclination angle near end, the less mode in inclination angle, to penetrate direction consistent and can realize that intensity improves as making near the close light beam of the angle of the light beam of end and near the light beam the LGP center, making.
Figure 31 is the sectional view that the related LGP of other variation 1 is shown with LED 2.In this variation, the plane of incidence 13 is carried out 2 cut apart, the first half is made as the 1st plane of refraction (the 1st deflection plane) 13e, the latter half is made as the 2nd plane of refraction (the 2nd deflection plane) 13f.In addition structure is identical with above-mentioned embodiment.
In Figure 31, in LGP 1, carry out leaded light, so that reflect among the 1st plane of refraction 13e, the light that penetrates from the first half of LED 2 towards the 2nd interarea 12, makes from the light of the Lower Half ejaculation of LED 2 among the 2nd plane of refraction 13f, to reflect and towards the 1st interarea 11.
Figure 32 is the sectional view that the related LGP of other variation 1 is shown with LED 2.In this variation, formed highlightedly the protuberance 15 ' that takes out parts as light to the 2nd interarea 12.Protuberance 15 ' is made of the inclined-plane S1 of light source side and inclined-plane (inclined plane) S2 of opposition side.In addition structure is identical with above-mentioned embodiment.As the shape of protuberance 15 ', cross section shown in Figure 32 also can be other shape except triangle, and for example the cross section also can be trapezoidal.
In Figure 32, in LGP 1, carry out leaded light so that the light that penetrates from the first half of LED 2 reflect towards the 2nd interarea 12 among the 1st deflection plane 13a and make from the light of the Lower Half ejaculation of LED 2 among the 2nd deflection plane 13b, reflecting and after the 1st interarea 11, be reflected diffusion by inciding inclined-plane S2, the light beam that has departed from from the angle of total reflection penetrates as illumination light from the 1st interarea 11.
Figure 33 is the sectional view that the related LGP of other variation 1 is shown with LED 2.In this variation, and relatively be provided with LED 2 near the end of the 1st interarea 11.In addition structure is identical with above-mentioned embodiment.The light that penetrates from the left side of LED 2 from 11 incidents of the 1st interarea and by the 2nd deflection plane 13b reflection towards the 1st interarea 11, the light that penetrates from the right-hand part of LED 2 by the 1st deflection plane 13a reflection towards the 2nd interarea 12.
Figure 34 is the sectional view that the related LGP of other variation 1 is shown with LED 2.In this variation, be provided with V groove as light taking-up section 15 in the 1st interarea 11 sides.The angle of inclination of the 1st inclined-plane (inclined plane) V1B of V groove is 30 degree.In addition structure is identical with above-mentioned embodiment.
In LGP 1, carry out leaded light so that the light that penetrates from the first half of LED 2 reflect towards the 2nd interarea 12 among the 1st deflection plane 13a and make from the light of the Lower Half ejaculation of LED 2 among the 2nd deflection plane 13b, reflecting and after the 1st interarea 11, thereby see through by inciding the total reflection of the 1st inclined-plane V1G destruction, and penetrate from the 1st interarea 11 as illumination light.At this moment, penetrate direction and be with respect to the 1st inclined-plane V1G and rolled the state of 50 degree (with respect to the normal of the 1st interarea 11,80 degree have tilted) oblique to reverse light-source.In this variation, be made as at 1.5 o'clock in the refractive index with LGP, angle of reflection is that the guiding light of 42 degree ~ 83 degree carries out total reflection and leaded light in the 1st interarea 11 and the 2nd interarea 12, therefore can suppress loss low.On the other hand, angle of reflection is that the guiding of 83 degree ~ 90 degree has only been carried out the light source Zhou Bianguang of refraction, the diffraction light due to the plane of incidence edge by the plane of incidence, therefore becomes low-intensity.And, do not have the guiding of total reflection only to inject to the low intensive light of periphery from light source with angle of reflection 38 degree ~ 42 degree, and in the plane of incidence, carry out Fresnel reflection, be low-intensity (with reference to the curve map of Figure 29) therefore.That is, by total reflection high-intensity light being carried out leaded light, is high efficiency therefore.
The result of study that the inventor carries out is described.In model shown in Figure 35, the V angle of the v-groove that the angle that will be made as with respect to the angle of the 1st inclined-plane V1 of the normal of the 2nd interarea 12 θ 1, the 2nd inclined-plane V2 is made as θ 2, the plane of incidence 13 is made as 3=180 ° of-2 θ of θ 3(θ) time, compare with following three conditions:
(A) light is from the 1st deflection plane 13a and this both sides' incident of the 2nd deflection plane 13b;
(B) light is only from the 1st deflection plane 13a incident;
(C) light is only from the 2nd deflection plane 13b incident.
(a) ~ (c) of Figure 36 be illustrated in θ 3=160 degree, θ 1=60 degree, the figure of the angular characteristics of the illumination light intensity corresponding with condition (A) ~ (C) respectively when θ 2=30 spends.The explanation of RA, RB is identical with Fig. 7.In this example, the peak-peak angle θ of condition (A) MaxallBe 23 degree, the peak-peak angle θ of condition (B) MaxupperBe 23 degree, the peak-peak angle θ of condition (C) MaxlowerBe 23 degree, the light that therefore sees through the 1st deflection plane 13a and the 2nd deflection plane 13b penetrates to same direction.
(a) ~ (c) of Figure 37 be illustrated in θ 3=140 degree, θ 1=60 degree, the figure of the angular characteristics of the illumination light intensity corresponding with condition (A) ~ (C) respectively when θ 2=30 spends.In this example, the peak-peak angle θ of condition (A) MaxallBe 23 degree, the peak-peak angle θ of condition (B) MaxupperBe 22 degree, the peak-peak angle θ of condition (C) MaxlowerBe 28 degree, therefore can change the ejaculation direction, become outwardly with respect to the light that has seen through the 1st deflection plane 13a so that seen through the light of the 2nd deflection plane 13b.
(a) ~ (c) of Figure 38 be illustrated in θ 3=170 degree, θ 1=60 degree, the figure of the angular characteristics of the illumination light intensity corresponding with condition (A) ~ (C) respectively when θ 2=30 spends.In this example, the peak-peak angle θ of condition (A) MaxallBe 23 degree, the peak-peak angle θ of condition (B) MaxupperBe 23.5 degree, the peak-peak angle θ of condition (C) MaxlowerTherefore be 21 degree, can change and penetrate direction so that see through the light of the 2nd deflection plane 13b and become inwardly with respect to the light that sees through the 1st deflection plane 13a.The ejaculation light that sees through the 1st deflection plane 13a and the peak value differential seat angle of the ejaculation light that sees through the 2nd deflection plane 13b are preferably in 10 degree.
As mentioned above, disposition interval, the groove width of the V groove by considering LGP, the uneven illumination that can reduce in the outgoing plane is even, the lighting device that realization can be thrown light on more equably.In the situation of salient point, pass through similarly to adopt the 3D shape of regulation and the disposition interval of regulation, thereby the uneven illumination that reduces in the outgoing plane is even, can realize the lighting device that can throw light on more equably.
For this reason, use possesses the lighting device U(U1 of these light taking-up sections 15), can access this lighting device U(U1) but the ligthing paraphernalia that also can throw light on efficiently to the illuminated zone of front side in the inboard that is arranged at illuminated zone, can access low-power consumption and illumination ligthing paraphernalia on hand efficiently.
In addition, the related lighting device U(U1 of present embodiment is being installed) and the 1st luminous interarea 11 of face that carries out of this lighting device is arranged in the lighting lamp of the structure used with illuminated almost parallel, even this lighting device is arranged at the inboard in illuminated zone and makes the 1st interarea and console table upper surface almost parallel, also can throw light on efficiently to the illuminated zone of user's front side.That is, but can access low-power consumption and on hand lighting lamp of illumination efficiently.
As mentioned above, the lighting device relevant with the present invention disposes diffuser plate in the outside of the 1st interarea, take out parts even therefore disposed discretely light, also can reduce the uneven illumination even (brightness irregularities) of the illumination light in the outgoing plane, can realize evenly and the high-quality lighting device soft to eyes.In addition, take out parts via light and make the light deflection predetermined angular of self-emission device (LED) and shine as illumination light, therefore have can to from the interarea institute of the ejaculation illumination light of LGP towards the different direction of direction shine the light distribution property of high light.For this reason, by using LGP, but become slim, lightweight and be applicable to can low-power consumption and efficiently illumination on hand ligthing paraphernalia and the lighting device of lighting lamp.
Then, use Figure 39 explanation to be used for the LGP of the lighting device of the 5th embodiment.
LGP 1H shown in Figure 39 is the LGP that the lighting device of the present embodiment identical with Fig. 1 is fit to possess, be that the transparent body, for example refractive index more than 1 is about 1.5 PMMA, PC and consists of by refractive index, length L is 50mm, and width (direction vertical with paper) is 200mm, thickness=3mm.In addition, the diffusion angle of light taking-up section 15 (half value fabric width) σ=5 °, tsin σ=0.26mm, the width of V groove is fixing, the width Lv=0.5mm of V groove, and the distance between the inclined-plane of light taking-up usefulness is larger and fixing than the width of adjacent V groove, Pmax=0.825mm, the V separation is fixed as 1.2mm, and the angle of the plane of incidence is 160 degree, and the fuzzy value of diffuser plate is 85%.In addition, fuzzy value is the value by Td/Tt * 100(%) obtain.Wherein, Td is diffusional permeability, and Tt is total light transmittance.
In addition, be provided with the light beam branching portion 16 that vertex angle theta 3 is 160 ° V groove shape at the plane of incidence 13.By the light beam branching portion 16 of this V groove shape is set, come the light of self-emission device to the direction branch towards the 1st interarea 11 of LGP 1G and the 2nd interarea 12, before arriving end face 14, effectively penetrate from the 1st interarea 11 via light taking-up section 15, can realize high efficiency lighting device.
By light beam branching portion 16 is set, the ejaculation light of the strongest vertical direction of intensity from the light that LED 2 penetrates is reflected at the plane of incidence 13, in LGP 1G, between interarea up and down, reflect and leaded light, generate the light that has departed from from the angle of total reflection via the light taking-up section 15 of V groove shape, and penetrate from the 1st interarea 11.
Be in the situation on plane at the plane of incidence 13, from light straight ahead in LGP that LED 2 vertically penetrates, therefore loss becomes large.
At the upper surface (the 2nd interarea 12) of LGP 1G, being formed with the cross section as light taking-up section 15 is triangular shaped a plurality of V grooves (protruding or recessed structure).Like this, by at the face relative with outgoing plane (the 1st interarea 11) light taking-up section 15 being set, can make the Illumination Distribution homogenising in the outgoing plane.Particularly can relax the distinctive dazzling sense of V groove, can realize the high-quality illumination soft to eyes.
The V groove has the 1st inclined-plane V1A of plane of incidence side and forms the 2nd inclined-plane V2A of V groove with the 1st inclined-plane V1A, the vertical line angulation θ 1(θ 1A of the 1st inclined-plane V1A and the 2nd interarea 12) be 60 °, the vertical line angulation θ 2(θ 2A of the 2nd inclined-plane V2A and the 2nd interarea 12) be 30 °.
The width of V groove (light conducting direction size) Lv is preferably the also little (Lv＜t) of thickness t than LGP 1G.If width Lv is excessive, the light quantity that is then penetrated outside LGP by a V groove inclined-plane reflection becomes large, and it is excessive that the brightness irregularities of illumination light can become.For this reason, in the present embodiment, the thickness t of LGP 1G is 3mm, and is relative therewith, and the width Lv of V groove is fixed as 0.5mm.
And the disposition interval of V groove (light conducting direction spacing) P is fixed as 1.2mm.Size and the spacing of V groove are fixed, and the part that does not therefore have to be carried out the light taking-up by light taking-up section 15 is not easy to allow the user feel twinkling under 75 degree.
1＜75 ° of the vertical line angulation θ 1 preferred satisfied 50 °＜θ of the 1st inclined-plane V1 and the 2nd interarea 12.When satisfying this condition, can be via penetrating efficiently illumination light to the direction that has tilted from the 1st interarea 11 with the 1st inclined-plane V1 that has carried out than 45 ° of large angle θ 1 tilting.In addition, among the light of the plane of incidence 13 incidents, by the 1st inclined-plane V1A reflection, the vertical line of the 1st interarea 11 and the maximum intensity direction angulation θ max that penetrates light can satisfy 15 °＜θ max＜35 ° before arriving relative end face 14.
If the vertical line of the 1st interarea 11 and the maximum intensity direction angulation θ max that penetrates light satisfy the structure of 15 °＜θ max＜35 °, even then the 1st interarea 11 is made as with illuminated (for example, the console table upper surface) parallel (level), the illuminated zone of also can throwing light on brightly in a wide range.In addition, can directly not enter observer's eyes from the high intensity illumination light of lighting device, so the user can not feel to dazzle and can clearly observe illuminated body.
For example as shown in Figure 3, possesses the lighting device of the 5th embodiment of this LGP 1H to the direction of the θ max shown in the figure, namely to penetrating maximum intensity light from the vertical line direction of lighting device towards the direction that the user has rolled tiltedly.
In addition, Figure 40 is illustrated in the figure that watches the structure of Fig. 1 on the direction of having carried out cutting off with the XL-XL line.In the situation that the normal direction of outgoing plane is watched, a plurality of the 1st inclined-plane V1 that become in the V groove of light taking-up section 15 are shinny and seem in addition dark strip pattern brightly, thereby but penetrating light by diffuser plate 5 is diffused, be difficult to see strip pattern,
Lighting device according to present embodiment, utilization is made as larger-size V groove more than the 0.5mm with light conducting direction full-size, make the light incident of in LGP 1H, carrying out leaded light and the coming horizontal deflection of going forward side by side, therefore reduce scattered light that diffraction causes etc., and reflection guides light reliably, thereby penetrate while improving the directionality that penetrates light when can guarantee high efficient, the lighting device of the illumination that has improved desired illumination direction can be provided thus.The brightness of the 1st interarea of obtaining by emulation shown in Figure 41.
Figure 42 illustrates the angular characteristics of the illumination light intensity of the lighting device that uses LGP 1H.Xz cross section shown in the figure be equivalent to by the center of lighting device shown in Figure 42 the face parallel with paper, namely arrive face up and down to the lighting space of console table upper surface from outgoing plane, the yz cross section shown in the figure is equivalent to the face parallel with the width of lighting device U (with the vertical direction of paper).
The angular characteristics of illumination light intensity shown in Figure 42 is based on the result of calculation of emulation, but by the 2nd interarea 12 at LGP 1H the light taking-up section 15 that the V groove by the regulation shape consists of is set, thereby shown in the illumination light intensity RA in xz cross section, the right direction of expression from the vertical line direction of lighting device to figure, the illumination light that has namely rolled tiltedly predetermined angular to the user distribute.In addition, being shown on the yz cross-wise direction such as the illumination light intensity RB in yz cross section as can be known is that the illumination light that roughly changes equably distributes.
The maximum intensity direction angulation θ max of ejaculation light in this case is approximately 20 °.Namely, be that the vertical line angulation θ v2 of 60 °, the 2nd inclined-plane V2 and the 2nd interarea 12 is the light taking-up section 15 that 30 ° V groove consists of by vertical line angulation θ 1 by the 1st inclined-plane V1 and the 2nd interarea 12 is set, can realize representing having rolled tiltedly the 20 photodistributed lighting devices of illumination of spending to the user.
About the plane of incidence 13 of LGP 1G with become face beyond the 1st interarea 11 of outgoing plane, closely disposed with each face and to have had the high reflecting plate of diffusion property and reflectivity.As this reflecting plate, the REF-WHITE that can use reflector plate with scattered reflection characteristic, produce such as KIMOTO company, the reflective films such as Lu Mile (Le ミ ラ one) that east beautiful (TORAY) Co., Ltd. produces.
In addition, at the downside of LGP 1H, dispose diffuser plate 5 across air layer (for example, about 0.5mm).By configuration diffuser plate 5, can reduce even, the brightness irregularities of uneven illumination in the outgoing plane of lighting device.Particularly can suppress the distinctive dazzling sense of V groove, realize the high-quality lighting device soft to eyes.
The V groove that consists of light taking-up section 15 is not set in the predetermined distance from the plane of incidence 13.For example, at the about 5mm of non-configuring area La(shown in Figure 39) in the V groove is not set, the V groove only is set in configuring area Lb.That is, this configuring area Lb becomes light and takes out parts section is set.When the V groove was set near the plane of incidence, owing to dispose discretely LED 2 as point source of light, so incident light was reflected before mutually mixing, and produces bright line and produce inhomogeneous in Luminance Distribution near the plane of incidence of lighting device.Therefore, non-configuring area La is set, after incident light is overlapping each other, makes light path carry out deflection.
The ligthing paraphernalia of the illuminating lamp that the lighting device of present embodiment can be preferred for using in the pond, lighting lamp etc.Lighting lamp as the ligthing paraphernalia that possesses the lighting device that has used this LGP 1G can similarly consist of with above-mentioned Fig. 8.
Lighting device as mentioned above, the illumination light that has rolled tiltedly 20 ° position and become maximum intensity towards the user is shown distributes, therefore shown in the angle θ max among the figure, penetrate the maximum intensity illumination light to rolling towards user (observer 40) about 20 ° direction oblique.In addition, the reverberation RF from 30 reflections of console table upper surface enters observer 40 eyes.
Figure and Fig. 9 of when the distance H with the 1st interarea 11 of this lighting device and console table upper surface is made as 400mm the Illumination Distribution of console table upper surface graphically being obtained are almost identical.
Carry out shading display as shown in Figure 9 such as the degree to brightness, near illumination under the lighting device of lighting lamp ST1 is high.In addition, have in front of the Illumination Distribution of the illumination of side (x axle+side) asymmetric higher than console table inboard (x axle-side).
Namely, even lighting lamp ST1 is disposed at inboard on the console table, and the outgoing plane (the 1st interarea 11) of lighting device being configured to parallel with respect to the console table upper surface, the maximum intensity illumination light also rolls tiltedly to observer 40, therefore can enough throw light on hand brightly.
The Illumination Distribution of illumination Ry on the y axle is roughly symmetrical with respect to initial point, but the Illumination Distribution of the illumination Rx on the x axle is asymmetrical, and x is the zone of observer's side, is that the rear side of lighting lamp ST1 is compared and thrown light on more brightly with x for the zone of bearing (-) for the zone of (+) just as can be known.
Thereby, by using the lighting device relevant with present embodiment, the high efficiency ligthing paraphernalia that can realize illuminating in a wide range illuminated zone and the useless illumination light towards the zone that does not need to throw light on is reduced.
For example, satisfy 15 °＜θ max＜35 ° by the direction that makes the maximum intensity that penetrates light, thereby make the normal reflection light in the sightingpiston of maximum intensity light reflex to user (observer) side, so the observer can more clearly observe.Even sightingpiston is diffusingsurface, also owing to the observation light intensity center of gravity situation consistent with the normal reflection direction is more, even therefore sightingpiston is that diffusingsurface is also effective.
Then, use Figure 43 ~ Figure 45 explanation in the density of the V groove of the 2nd interarea setting of LGP along with become the 6th large embodiment away from the plane of incidence 13.The lighting device of the 6th embodiment replaces with on this aspect of LGP 1H different at the LGP 1G with the lighting device of described the 5th embodiment, other structure is identical.For this reason, the section's structure of wanting as lighting device only shows LGP 1H in Figure 43.
As shown in figure 43, the LGP 1I that the lighting device of the 6th embodiment possesses is provided with the light taking-up 15I of section, and this light taking-up 15I of section is that the vertical line angulation θ 2 of 60 °, the 2nd inclined-plane V2A and the 2nd interarea 12 is that 30 ° V groove consists of by the vertical line angulation θ 1 of the 1st inclined-plane V1A and the 2nd interarea 12.The shape of V groove is identical in whole zone.
That is, as an example, the V groove that arranges at the 2nd interarea 12 of LGP 1I is asymmetric with respect to the vertical line of the 2nd interarea 12, and the 1st inclined-plane V1A and the 2nd inclined-plane V2A angulation θ 1+ θ 2 are 90 °.In addition, thickness t=3mm of LGP 1H, σ=8 °, tsin σ=0.42mm, the width of V groove is fixed, Lv=0.5mm, the distance between the inclined-plane of light taking-up usefulness is larger than the width of adjacent V groove, the ultimate range Pmax=1.125mm between the V groove, the disposition interval Pn of V groove is along with diminishing gradually away from the plane of incidence 13, its maximum=1.5mm, the angle of the plane of incidence is 160 degree, fuzzy value is 90%.
Disposition interval Pn by making the V groove is along with diminishing gradually, namely improve configuration density away from light source side like this, thereby compares with the fixing situation of V separation, can make the Luminance Distribution in the outgoing plane of lighting device more even.The brightness of the 1st interarea of obtaining by emulation shown in Figure 44.In addition, as shown in figure 45, the maximum intensity direction angulation θ max that penetrates light is about 20 °.
Figure 46 is the figure identical with Figure 43 of the related LGP 1I of variation.According to this variation, fix in the same manner as spacing and the 6th embodiment of the V groove of the light taking-up 15J of section, but the V groove shape is similar shape and along with become gradually large away from light source.But, the plane of incidence 13 is the plane, thickness t=the 3mm of LGP, σ=5 °, tsin σ=0.26mm, the width of V groove is along with become gradually large away from light source, its maximum Lv=0.9mm, the distance between the inclined-plane of light taking-up usefulness is larger than the width of adjacent V groove, the ultimate range Pmax=0.7mm between the V groove, the disposition interval P of V groove is for fixing and being 1.0mm, and fuzzy value is 80%.
Figure 47 is the figure identical with Figure 43 of the related LGP 1K of other variation.According to this variation, along with diminishing gradually away from light source, the V groove shape is similar shape and along with become gradually large away from light source as the spacing of the V groove of the light taking-up 15K of section.Thickness t=the 3mm of LGP, σ=5 °, tsin σ=0.26mm, the width of V groove is along with become gradually large away from light source, its maximum Lv=0.9mm, distance between the inclined-plane of light taking-up usefulness is larger than the width of adjacent V groove, and the distance between the V groove is along with becoming gradually large away from light source, Pmax=0.8mm, the disposition interval Pn of V groove is along with diminishing gradually away from the plane of incidence 13, its maximum=1.1mm, the angle of the plane of incidence (θ 3) is 160 degree, fuzzy value is 90%.
Then, use Figure 48 ~ Figure 50 explanation to be made as fixing in the spacing of the light taking-up 15L of section of the 2nd interarea setting of LGP and size but be not the V groove but be made as the 7th embodiment of dovetail groove.In the lighting device of the 7th embodiment, replace with on this aspect of LGP 1L differently at the LGP 1 with the lighting device U of described the first embodiment, other structure is identical.For this reason, the section's structure of wanting as lighting device only shows LGP 1L in Figure 48.
As shown in figure 48, the LGP 1L that possesses of the lighting device of the 7th embodiment possesses the bottom surface B parallel with the 1st interarea 11 between the 1st inclined-plane V1A and the 2nd inclined-plane V2A.With the vertical line angulation θ 1 of the 2nd interarea 12 be 60 °, the vertical line angulation θ 2 of the 2nd inclined-plane V2A and the 2nd interarea 12 is 30 °.In addition, the plane of incidence 13 is planes.
That is, as an example, the dovetail groove (recessed or protruding structure) that arranges at the 2nd interarea 12 of LGP 1L is asymmetric with respect to the vertical line of the 2nd interarea 12, and the 1st inclined-plane V1A and the 2nd inclined-plane V2A angulation θ 1+ θ 2 are 90 °.In addition, the thickness t of LGP 1I is 3mm, the width of dovetail groove is fixed, and Lv is 0.5mm, but the plane of incidence 13 is the plane, σ=3 °, tsin σ=0.26mm, the distance between the inclined-plane of light taking-up usefulness is larger than the width of adjacent dovetail groove, the ultimate range Pmax=0.925mm between the inclined-plane of light taking-up usefulness, the disposition interval of dovetail groove is for fixing and being 1.3mm, and fuzzy value is 85%.
In the present embodiment, the regional A between the bottom surface B by will 2nd interarea 12 parallel with the 1st interarea 11 being divided into dovetail groove and adjacent dovetail groove, thus can further reduce brightness irregularities in the 1st interarea 11.The brightness of the 1st interarea of obtaining by emulation shown in Figure 49.In addition, as shown in figure 50, the maximum intensity direction angulation θ max that penetrates light is about 30 °.
Then, use Figure 51 ~ Figure 55 explanation light taking-up section 15 to be set and spacing and size are made as the 8th fixing embodiment at the 1st interarea of LGP.The lighting device U2 of the 8th embodiment is shown in Figure 51, and also description thereof is omitted to use the mark that shares.
Figure 52 is the sectional view that the part of the LGP 1M relevant with the 8th embodiment is shown together with LED 2.In the present embodiment, be provided with V groove as the light taking-up 15M of section in the 1st interarea 11 sides.With reference to Figure 53, the tilt angle theta 1 of the 1st inclined-plane (inclined plane) V1G of V groove is 30 degree, and the tilt angle theta 2 of the 2nd inclined-plane V2G is 60 degree.In addition structure is identical with above-mentioned embodiment.In addition, light take out with between inclined-plane and the diffusingsurface apart from T=0.5mm, σ=5 °, the width of V groove is fixed, and it is larger and fix than the width of adjacent V groove that Lv=0.5mm, light take out distance between the inclined-plane of usefulness, Pmax=0.625mm, the disposition interval of V groove is for fixing and being 1.0mm, and the angle of the plane of incidence is 160 degree, and fuzzy value is 65%.
As described in Figure 52, in LGP 1, carry out leaded light so that the light that penetrates from the first half of LED 2 reflect towards the 2nd interarea 12 among the 1st deflection plane 13a and make from the light of the Lower Half ejaculation of LED 2 among the 2nd deflection plane 13b, reflecting and after the 1st interarea 11, destroy total reflection and see through by inciding the 1st inclined-plane V1G, penetrate as illumination light from the 1st interarea 11.At this moment, penetrating direction is to reverse light-source the roll 50 degree oblique state of (with respect to the normal of the 1st interarea 11 and 80 degree that tilted) with respect to the 1st inclined-plane V1G.The larger direction of inclination that can be implemented in thus from the vertical line of outgoing plane has the direction-sense lighting device that penetrates light.The brightness of the 1st interarea of obtaining by emulation shown in Figure 54.In addition, shown in Figure 55, the maximum intensity direction angulation θ max that penetrates light is about 22.5 °.
The numerical value of the respective embodiments described above and variation is shown in table 1 with summing up.
Figure BDA00002094362900361
The invention is not restricted to embodiment and the variation of specification record, and also comprise other embodiment and variation, this embodiment of putting down in writing according to this specification, technological thought and be self-evident to those skilled in the art.The record of specification and embodiment are only take illustration as purpose, and scope of the present invention is illustrated by claim.

Claims (31)

1. a lighting device is the lighting device that ligthing paraphernalia is used, and possesses: LGP, this LGP possess the 1st interarea and 2nd interarea relative with described the 1st interarea and in the upwardly extending side surface part in side of intersecting with described the 1st interarea and described the 2nd interarea; And the light source that extends at the length direction of described side surface part, described lighting device makes light that described light source penetrates in described the 1st interarea and the reflection of described the 2nd interarea and carries out leaded light and penetrate from described the 1st interarea in described LGP, wherein,
Be provided with light taking-up section at described the 1st interarea or described the 2nd interarea, this light taking-up section makes the optical path-deflecting in the described LGP and makes the incidence angle towards described the 1st interarea become the angle less than the angle of total reflection, thereby takes out light from described the 1st interarea,
Be formed with the recessed or protruding structure of described light taking-up section, with from the vertical line direction deflection predetermined angular of described the 1st interarea and irradiating illumination light, and the vertical line that makes described the 1st interarea and the maximum intensity direction angulation θ max that penetrates light satisfy 10 °＜θ max＜40 °.
2. lighting device according to claim 1 is characterized in that,
Described light taking-up section has recessed or protruding repetitive construct at light conducting direction.
3. lighting device according to claim 2 is characterized in that,
Described light taking-up section is made of a plurality of grooves that the length direction in described side surface part extends, described groove has from the 1st inclined-plane of a side of the light institute incident of described light source with the 1st inclined-plane and forms the 2nd inclined-plane of described groove, and the vertical line angulation θ 1 of described the 1st inclined-plane and described the 2nd interarea satisfies 1＜75 ° of 50 °＜θ.
4. lighting device according to claim 3 is characterized in that,
When the vertical line angulation with described the 2nd inclined-plane and described the 2nd interarea was made as θ 2, described the 1st inclined-plane and described the 2nd inclined-plane angulation θ 1+ θ 2 satisfied 2＜110 ° of 80 °＜θ 1+ θ.
5. lighting device according to claim 3 is characterized in that,
Described light taking-up section is arranged at described the 2nd interarea, is penetrated from described the 1st interarea by the light of described the 1st inclined-plane reflection.
6. lighting device according to claim 3 is characterized in that,
Described light taking-up section is arranged at described the 1st interarea, penetrates from described the 1st interarea at the light of described the 1st inclined-plane refraction.
7. lighting device according to claim 1 is characterized in that,
Described light taking-up section is arranged at described the 2nd interarea, and consisted of by a plurality of protuberances that the length direction in described side surface part extends, described protuberance has from the 1st inclined-plane of a side of the light institute incident of described light source with the 1st inclined-plane and forms the 2nd inclined-plane of described protuberance, is penetrated from described the 1st interarea by the light of described the 2nd inclined-plane reflection.
8. lighting device according to claim 1 is characterized in that,
Incide the light that penetrates from described the 1st interarea after the described light taking-up section, with respect to the vertical line of described the 1st interarea to from the side that disposed described light source away from the angle that tilted of direction penetrate.
9. the described lighting device of each according to claim 1 ~ 8 is characterized in that,
Described light taking-up section is configured to make density to uprise towards another end from the side from the light institute incident of described light source.
10. the described lighting device of each according to claim 1 ~ 7 is characterized in that,
Also possess the diffuser plate relative with described the 1st interarea.
11. the described lighting device of each according to claim 1 ~ 7 is characterized in that,
Also possess the reflecting plate relative with described the 2nd interarea.
12. lighting device according to claim 10 is characterized in that,
Also possess the reflecting plate relative with described the 2nd interarea.
13. the described lighting device of each according to claim 1 ~ 8 is characterized in that,
Described LGP is formed by the material of refractive index greater than 1.4 medium, and described side surface part possesses the 1st deflection plane and the 2nd deflection plane, and described the 1st deflection plane and described the 2nd deflection plane form recess in described side surface part,
Seeing through described the 1st deflection plane and the 2nd deflection plane or after described the 1st deflection plane and the reflection of the 2nd deflection plane from the light of described light source, in described LGP internal reflection and by leaded light,
Constitute in described LGP by among the light of leaded light, see through described the 1st deflection plane or at the light of described the 1st deflection plane reflection and see through described the 2nd deflection plane or, penetrate to the same side from the vertical line of described the 1st interarea with respect to described the 1st interarea after the two incides described light taking-up section at the light of described the 2nd deflection plane reflection.
14. lighting device according to claim 13 is characterized in that,
The recess of described side surface part forms the V groove shape, and its vertex angle theta 3 satisfies 3＜160 ° of 120 °＜θ.
15. lighting device according to claim 13 is characterized in that,
It is relative with described side surface part that described light source is configured to, thereby reflect in described LGP internal reflection and by leaded light at described the 1st deflection plane and the 2nd deflection plane from the light of described light source.
16. lighting device according to claim 13 is characterized in that,
Described light source relatively disposes at end and described the 1st interarea of described LGP, from the light of described light source from described the 1st interarea incident and in described the 1st deflection plane and the reflection of the 2nd deflection plane, thereby in described LGP internal reflection and by leaded light.
17. the described lighting device of each according to claim 2 ~ 7 is characterized in that,
The full-size of the light conducting direction of at least one in the described recessed or protruding repetitive construct is more than the 0.5mm, and the maximum at the described light conducting direction interval between described recessed or protruding structure is larger than the maximum of the light conducting direction size of described recessed or protruding structure.
18. lighting device according to claim 13 is characterized in that,
The full-size of the light conducting direction of at least one in the described recessed or protruding repetitive construct is more than the 0.5mm, and the maximum at the described light conducting direction interval between described recessed or protruding structure is larger than the maximum of the light conducting direction size of described recessed or protruding structure.
19. lighting device according to claim 18 is characterized in that,
Have the diffuser plate relative with described the 1st interarea,
Largest interval on the described inclined plane that will consist of described light taking-up section is made as Pmax(mm), when the half value fabric width of the angle of flare of the light that will penetrate from described inclined plane is made as σ (°), the distance of described inclined plane and described diffuser plate is made as T(mm), satisfy following formula
T sinσ<Pmax<T sinσ+0.7 （1）。
20. lighting device according to claim 19 is characterized in that,
Described inclined plane in described light taking-up section has proliferation part.
21. lighting device according to claim 20 is characterized in that,
Diffusance on the light conducting direction that is provided by described proliferation part is that 3 degree are to 10 degree under intensity half value fabric width.
22. lighting device according to claim 13 is characterized in that,
Also possess the diffuser plate relative with described the 1st interarea and the reflecting plate relative with described the 2nd interarea.
23. lighting device according to claim 1 is characterized in that,
Described light taking-up section is made of the diffusion point.
24. according to claim 1～8, each the described lighting device in 23, it is characterized in that,
Described light source is included in devices spaced apart on the length direction of described side surface part and a plurality of LED of disposing.
25. lighting device according to claim 13 is characterized in that,
Described light source is included in devices spaced apart on the length direction of described side surface part and a plurality of LED of disposing.
26. lighting device according to claim 17 is characterized in that,
Described light source is included in devices spaced apart on the length direction of described side surface part and a plurality of LED of disposing.
27. lighting lamp, used each the described lighting device in the claim 1 ~ 8,23, wherein, this lighting lamp possesses pedestal section and support, in the front of described support described lighting device is installed, the 1st interarea of described lighting device is arranged to use with illuminated almost parallel, from the ejaculation light of described lighting device with to from the side that disposed described support away from the angle that tilted of direction penetrate.
28. lighting lamp, used the described lighting device of claim 13, this lighting lamp possesses pedestal section and support, in the front of described support described lighting device is installed, the 1st interarea of described lighting device is arranged to use with illuminated almost parallel, from the ejaculation light of described lighting device with to from the side that disposed described support away from the angle that tilted of direction penetrate.
29. according to claim 27 or 28 described lighting lamps, it is characterized in that,
Also possess the diffuser plate relative with described the 1st interarea and the reflecting plate relative with described the 2nd interarea.
30. lighting lamp according to claim 27 is characterized in that,
Described light source is included in devices spaced apart on the length direction of described side surface part and a plurality of LED of disposing.
31. lighting lamp according to claim 28 is characterized in that,
Described light source is included in devices spaced apart on the length direction of described side surface part and a plurality of LED of disposing.
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