CN101684917A - Non-imaging optical directional light distribution method for LED lighting source - Google Patents

Non-imaging optical directional light distribution method for LED lighting source Download PDF

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Publication number
CN101684917A
CN101684917A CN200910022669A CN200910022669A CN101684917A CN 101684917 A CN101684917 A CN 101684917A CN 200910022669 A CN200910022669 A CN 200910022669A CN 200910022669 A CN200910022669 A CN 200910022669A CN 101684917 A CN101684917 A CN 101684917A
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light
led
directional
distribution
distribution lens
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CN101684917B (en
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胡家培
胡民海
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Xian Zhihai Power Technology Co Ltd
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Xian Zhihai Power Technology Co Ltd
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Priority to CN200910022669XA priority Critical patent/CN101684917B/en
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Priority to PCT/CN2010/000739 priority patent/WO2010133094A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)

Abstract

The invention provides a non-imaging optical directional light distribution method for an LED light source, which re-distributes, reshapes and changes energy of the LED light source through a directional refraction non-imaging light distribution lens. The method comprises the following steps that: LED light emitted by the LED light source is refracted through a light distribution lens, emergent light is refracted towards a set direction to form LED directional light; the LED directional light is overlaid to form an LED directional beam; LED directional beams are overlaid to form LED directional light sources; the LED directional light sources in multiple directions are overlaid to form the LED lighting source. The method solves the technical problems of poor evenness of light distribution,low lighting efficiency and poor light effect due to the fact that the prior art cannot improve the Lambert character of the LED light source and cannot realize directional light distribution. The method can sufficiently utilize light energy and realize directional control of light distribution, is applicable to lamps with various lighting purposes, and can ensure that the illuminance of each point in a lighting range can completely meet the requirement of lighting standard.

Description

The non-imaging optical directional light distribution method of LED lighting source
Technical field
The invention belongs to nonimaging optics luminous intensity distribution technical field, be specifically related to a kind of non-imaging optical directional light distribution method of LED lighting source.
Background technology
Functional lighting such as street lamp, Tunnel Lamp, require minimal illumination index, the highest dazzle of all necessary satisfied illumination code requirement of illumination of every bit in the illumination zone to require index, light intensity uniformity index and light area requirement for restriction, require also very high reliability of products and energy-saving and environmental protection performance etc.In order to improve illuminating effect; the health of protection eye must utilize light fixture to carry out the optical system illuminating light distribution, promptly in a given site of road and given zone, road surface; form a uniform light field of illumination by light-illuminating, the light that shines outside the given area is regarded as invalid light.
The luminous intensity distribution of traditional lighting light fixture mainly is to rely on reflector that light is reflected distribution, light is controlled in the rational regulation zone, and improves the uniformity of light intensity.This method of carrying out the light intensity distribution by reflection, its major defect is that optical energy loss is big, power consumption is big.
The encapsulation of common led light source as shown in Figure 1.Its light distribution E is directly proportional with the cosine of beam angle θ ', and the light that led light source 101 sent is being decayed rapidly with the increase of angle of emergence θ ' according to formed illumination E on the surface.What led light source 101 can be regarded a kind of 180 degree angle bright dippings as has lambert (Lambertian) characteristic light source, and light distribution is that the center is strong, periphery weakens, as shown in Figure 2.If the characteristic of led light source is not carried out the secondary optics design, such light distribution is difficult to satisfy the demand of function lighting use, and the existence of a large amount of invalid light not only makes optical energy loss big, has also reduced illuminating effect widely.Below be the place's taper seat curve of light distribution analysis of existing LED road lamp largest light intensity:
Fig. 3 is the distribution curve flux that the 240W symmetric form of actual measurement does not have suitable light-distribution LED street lamp, and it shows quite a few luminous energy and leaks into beyond the effective coverage frame 102.The result shows that invalid wide the earth has reduced illuminating effect.For realizing lighting requirement, light source can only be gone out power and be increased to 240W, cause energy waste.
Fig. 4 is the distribution curve flux of the 150W butterfly type light-distribution LED street lamp of actual measurement.It shows that the result shows that the uniformity of illumination is very poor, along shadow surface dazzle is arranged, and the blind area is arranged in the irradiation area.
Led light source generally is divided into single light source and multiple light courcess two classes.
Existing multi-light source LED lighting, its luminous intensity distribution are by the setting angle of adjusting numerous light sources light intensity to be carried out direct projection to distribute, and the lighting of formation is a module group type.The multiple light courcess light fixture is Heavy Weight not only, and has produced multiple image, has limited the power expansion and the scope of application, is serious potential safety hazard to vehicle and pedestrian especially.
Existing single light source LED lighting, its luminous intensity distribution mainly are the imitation conventional lamp, rely on reflector that light is reflected distribution.Because the existence of lambert (Lambertian) characteristic, the light that reflector can reflect are seldom, can't fundamentally improve the characteristic that led light source light distribution center is strong, periphery weakens.
Summary of the invention
The object of the present invention is to provide a kind of non-imaging optical directional light distribution method of LED lighting source, it has solved lambert's characteristic that prior art can't fundamentally be improved led light source, thereby can not realize directional light distribution, cause that the luminous intensity distribution uniformity is poor, light efficiency is low, the technical problem of illuminating effect difference.
Technical scheme of the present invention is as follows:
The present invention utilizes light to dredge the refraction effect of material from the close material of light to light, overcomes lambert's characteristic of led light source, the characteristic that promptly the light distribution center is strong, periphery weakens.The present invention reflects non-imaging light-distribution lens by orientation the energy of led light source is redistributed, the light that led light source sent is carried out shaping, change, control with making full use of of realization luminous energy, make the LED spot light become the lens surface uniform surface light source with the orientation of light distribution.Implementation step is as follows:
(1) the LED light that sends of led light source reflects through light-distribution lens, and emergent light forms the LED directional rays towards the direction refraction of setting;
(2) LED directional rays stack forms the LED directional beam;
(3) LED directional beam stack forms the LED directional light sources;
(4) multi-direction LED directional light sources stack forms the LED lighting source.
The formation of the above LED directional rays comprises following performing step:
(1.1) according to the designing requirement of the hot spot of LED lighting source, determine LED light outgoing direction of light behind light-distribution lens, can get the angle of emergence θ of LED light behind light-distribution lens thus 4
(1.2) selected LED light is incident to the incident medium refractive index N of light-distribution lens 1, light-distribution lens refractive index N 2And the emergent medium refractive index N of LED light behind light-distribution lens 3Make LED light be incident to the incidence angle θ of light-distribution lens 1, the angle of emergence θ behind light-distribution lens 4And incident medium refractive index N 1, light-distribution lens refractive index N 2, emergent medium refractive index N 3Satisfy following functional relation:
θ 4＝sin -1(N 2sin(θ-sin -1(N 1sinθ/N 2)/N 3))，
Obtain the incidence angle θ that LED light is incident to light-distribution lens 1
(1.3) make the plane of incidence of light-distribution lens and the angle theta of exit facet, the incidence angle θ that LED light is incident to light-distribution lens 1Satisfy following relationship:
θ＝θ 1；
Obtain the angle theta of the light-distribution lens plane of incidence and exit facet, can determine the plane of incidence and the exit facet of light-distribution lens thus;
(1.4) make LED light with incidence angle θ 1Be incident to light-distribution lens, after the light-distribution lens refraction, obtain the LED directional rays.
The above LED directional rays stack can comprise that light is carried out directed enhanced optical to be handled.
The above LED directional beam stack can comprise the optical treatment that light is reflected compression.
The stack of above-described LED directional light sources can comprise that the hot spot that makes the LED lighting source is scattered in the optical treatment of rectangle, triangle, circle, semicircle, the fan-shaped or basic geometry that parabola constitutes, or makes the hot spot of LED lighting source be scattered in two optical treatment to the multiple compound shape that is combined to form by basic geometry.
The optical treatment of the above LED directional rays stack, the stack of LED directional beam and the stack of LED directional light sources can comprise diffuse light processing respectively.
The above multi-direction LED directional light sources stack forms LED lighting source can carry out luminous intensity distribution according to the light spot shape of illumination index, dazzle index, luminous intensity index, light uniformity index and the field of illumination of field of illumination designing requirement etc.
The packaged type of the above led light source can adopt modes such as the stack of COB formula, integrated form stack or module type stack.
The present invention has following advantage:
1. it is big to collect light angle, can make full use of the luminous energy of led light source, the light efficiency height, and optical energy loss is little, realizes that the lighting requirement desired power is little, therefore can save energy.
2. can the directed control of the light distribution of led light source be controlled at light in the regulation field of illumination, and improve the uniformity of light intensity, energy-conservation and illuminating effect is good.
3. fundamentally changed lambert's characteristic of led light source, the light distribution that makes led light source is along with the decay that shooting angle increases is less, and power expansion is convenient, is applicable to the light fixture of types of functionality lighting use, the reliability of products height.
4. make the LED spot light become the lens surface uniform surface light source, luminous intensity distribution uniformity height can be realized precise light distribution control.
5. can make the illumination of every bit in the illumination zone all satisfy the illumination code requirement fully, promptly satisfy minimal illumination index, the highest dazzle requirement index, light intensity uniformity index and light area requirement for restriction etc.
6. non-blind area, free from glare in the irradiation area, the uniformity height of illumination uses environmental protection, is beneficial to eye health.Light fixture is in light weight, uses no potential safety hazard.
7. implementation method is simple, and cost is low.
Description of drawings:
Fig. 1 is the packaged type of existing common led light source.
Fig. 2 is the Lambertian source of 180 ° of beam angles for the led light source equivalence.
Fig. 3 is the distribution curve flux that the existing 240W symmetric form of actual measurement does not have suitable light-distribution LED street lamp,
Wherein,
(a) be the meridian plane distribution curve flux;
(b) be the largest light intensity place taper seat curve of light distribution.
Fig. 4 is the distribution curve flux of the existing 150W butterfly type light-distribution LED street lamp of actual measurement,
Wherein,
(a) be the meridian plane distribution curve flux;
(b) be the largest light intensity place taper seat curve of light distribution.
Fig. 5 is a directed plane of refraction optical schematic diagram of the present invention.
Fig. 6 is the directed astigmatism refraction of a light-distribution lens of the present invention schematic diagram.
Fig. 7 is a light-distribution lens directed beams anaclasis schematic diagram of the present invention.
Fig. 8 is the directed banded refraction schematic diagram of light-distribution lens of the present invention.
Fig. 9 is the structural representation with the directed refraction of the present invention light-distribution lens of Pro/Engineer software design.
Figure 10 is the LightTools software emulation taper seat plot of light intensity of the existing symmetric form LED street lamp that do not have suitable luminous intensity distribution.
Figure 11 is to use the LightTools software emulation taper seat plot of light intensity of the LED street lamp of the directed refraction of the present invention light-distribution lens.
Figure 12 is to use the LightTools software emulation distribution curve flux of the LED street lamp of the directed refraction of the present invention light-distribution lens.
Figure 13 is to use the engineering of the directed refraction of the present invention light-distribution lens analog simulation LED street lamp to use schematic diagram.
Figure 14 is the directed light distribution map that reflects the LED street lamp of nonimaging optics light-distribution lens of use the present invention of actual measurement.
Figure 15 is the directed distribution curve flux that reflects the LED street lamp of nonimaging optics light-distribution lens of use the present invention of actual measurement,
Wherein,
(a) be the meridian plane distribution curve flux;
(b) be the largest light intensity place taper seat curve of light distribution.
Figure 16 is the comparison diagram of the LED street lamp of same power, same light source, different lens condition,
Wherein,
(a) be the common thick lens LED street lamp that waits;
(b) be directed refractor LED street lamp;
(c) be the common thick lens that waits;
(d) be directed refractor.
Figure 17 is the distribution curve flux that actual measurement 150W uses the LED street lamp of the directed refraction of the present invention nonimaging optics light-distribution lens,
Wherein,
(a) be the meridian plane distribution curve flux;
(b) be the largest light intensity place taper seat curve of light distribution.
The specific embodiment
The directed refraction principle of light-distribution lens of the present invention:
(i) Snell's law: light incides on the interface of different medium, and reflection and refraction can take place.Wherein incident light and refract light are positioned on the same plane, and satisfy following relationship with the angle of interface normal:
Si Nieer formula N mSin θ m=N nSin θ n,
N wherein m, N nBe respectively the refractive index of two media, θ mAnd θ nBe respectively incidence angle and refraction angle.
The (ii) directed refraction principle of light-distribution lens:
As shown in Figure 5, the incident medium refractive index N of light-distribution lens 1, light-distribution lens refractive index N 2, the emergent medium refractive index N of LED light behind light-distribution lens 3LED light is incident to the incidence angle θ of light-distribution lens 1, inject the refraction angle θ behind the light-distribution lens 2, outgoing is to the incidence angle θ of emergent medium 3, the angle of emergence θ behind light-distribution lens 4The plane of incidence of light-distribution lens and the angle theta of exit facet.The refractive index N of lenticular body 203 2=1.56; Incident medium, the emergent medium of lenticular body 203 are air, then incident medium refractive index N 1=emergent medium refractive index N 3=1.
When the light of led light source when air is incident to lenticular body 203, N 2＞N 1θ then 1＞θ 2, the refraction of deflection normal takes place in light; When light when lenticular body 203 is injected the air, N 2＞N 3, θ then 4＞θ 3, the refraction of light generation off-normal, its off-normal, the angle of directed refraction is θ 4
∵θ 1＝θ，
N 1sinθ 1＝N 2sinθ 2
sinθ 2＝N 1sinθ 1/N 2
θ 2＝sin -1(N 1sinθ 1/N 2)＝sin -1(N 1sinθ/N 2)
θ 3＝θ 1-θ 2＝θ-θ 2＝θ-sin -1(N 1sinθ/N 2)
N 3sinθ 4＝N 2sinθ 3
sinθ 4＝N 2sinθ 3/N 3
θ 4＝sin -1(N 2sinθ 3/N 3)
Be θ 4=sin -1(N 2Sin (θ-sin -1(N 1Sin θ/N 2)/N 3))
If θ=30 °
θ then 4=sin -1((30 °-sin of 1.56sin -1(sin30 °/1.56)))=18 °
The (iii) directed astigmatism refraction of light-distribution lens: as shown in Figure 6, can equivalence be after the LED light of the Lambertian source of 180 ° of beam angles passes directed astigmatic profile of tooth lens, light can be towards vertical with profile of tooth and off-centered direction refraction, can change the optical field distribution shape thus, the refractive direction light intensity is improved, other direction light intensity decreasings also can carry out diffuse light and learn processing.
(iv) light-distribution lens directed beams anaclasis: as shown in Figure 7, can equivalence be after the LED light of the Lambertian source of 180 ° of beam angles passes directed beams light profile of tooth lens, light can be towards vertical with profile of tooth and towards the refraction of the direction at center, can change the optical field distribution shape thus, the refractive direction light intensity is improved, other direction light intensity decreasings also can reflect compression and light uniform treatment to exposing to effective lighting zone light in addition.
(the v) banded directed astigmatism refraction of light-distribution lens: as shown in Figure 8, can equivalence be after the LED light of the Lambertian source of 180 ° of beam angles passes the directed banded refractor of profile of tooth, light can be towards vertical banded direction refraction with profile of tooth, make the optical field distribution shape that becomes band, improve in banded direction light intensity, other direction light intensity decreasings also can carry out the light uniform treatment.
Specific implementation step of the present invention is as follows:
(1) the LED light that sends of led light source reflects through light-distribution lens, and emergent light forms the LED directional rays towards the direction refraction of setting.The formation of LED directional rays comprises following performing step:
(1.1) according to the designing requirement of the hot spot of LED lighting source, determine LED light outgoing direction of light behind light-distribution lens, can get the angle of emergence θ of LED light behind light-distribution lens thus 4
(1.2) selected LED light is incident to the incident medium refractive index N of light-distribution lens 1, light-distribution lens refractive index N 2And the emergent medium refractive index N of LED light behind light-distribution lens 3Make LED light be incident to the incidence angle θ of light-distribution lens 1, the angle of emergence θ behind light-distribution lens 4And incident medium refractive index N 1, light-distribution lens refractive index N 2, emergent medium refractive index N 3Satisfy following functional relation:
θ 4＝sin -1(N 2sin(θ-sin -1(N 1sinθ/N 2)/N 3))，
Obtain the incidence angle θ that LED light is incident to light-distribution lens 1
(1.3) make the plane of incidence of light-distribution lens and the angle theta of exit facet, the incidence angle θ that LED light is incident to light-distribution lens 1Satisfy relation: θ=θ 1, obtain the angle theta of the light-distribution lens plane of incidence and exit facet, can determine the plane of incidence and the exit facet of light-distribution lens thus.
(1.4) make LED light with incidence angle θ 1Be incident to light-distribution lens, after the light-distribution lens refraction, obtain the LED directional rays.
(2) LED directional rays stack forms the LED directional beam.The stack of LED directional rays can comprise that also light is carried out directed enhanced optical to be handled.
(3) LED directional beam stack forms the LED directional light sources.The stack of LED directional beam also can comprise the optical treatment that light is reflected compression.
(4) multi-direction LED directional light sources stack forms the LED lighting source.LED directional light sources stack can comprise that the hot spot that makes the LED lighting source is scattered in the optical treatment of rectangle, triangle, circle, semicircle, the fan-shaped or basic geometry that parabola constitutes, or makes the hot spot of LED lighting source be scattered in two optical treatment to the multiple compound shape that is combined to form by basic geometry.The optical treatment of the stack of LED directional rays, the stack of LED directional beam and the stack of LED directional light sources can comprise diffuse light processing respectively.The stack of multi-direction LED directional light sources forms the LED lighting source can carry out luminous intensity distribution according to the light spot shape of illumination index, dazzle index, luminous intensity index, light uniformity index and the field of illumination of field of illumination designing requirement etc.
The packaged type of led light source of the present invention can adopt modes such as the stack of COB formula, integrated form stack or module type stack.
Light-distribution lens of the present invention can adopt glass material, PC material or PMMA material etc.Characteristics such as that glass material has is high temperature resistant, penetrance height.The PC material is a makrolon material, and the PMMA material is a polymethyl methacrylate materials, and not only penetrance is higher for these two kinds of materials, realizes aspheric surface optically focused easily, reduces the yellow milky spot phenomenon of hot spot, can also make the product injection mo(u)lding, makes production cost lower.Lenticular body 203 also can adopt transparent PS material, and promptly the transparent polystyrene material is commonly called as benzene.
Use the analog simulation illuminating lamp example of the directed refraction of the present invention nonimaging optics light-distribution lens:
Utilize the present invention that the orientation refraction light-distribution lens of different directions is made up, luminous intensity distribution is carried out in the projection light light distribution of led light source, can make light distribution satisfy application request.
Fig. 9 is the directed refraction of the LED light fixture light-distribution lens with the design of Pro/Engineer software, and the requirement of road lighting light distribution is satisfied in its light distribution fully.According to road shape nonuseable part light distribution beyond roadside, the limit, room is reflected compression, road is reflected enhancing along the useful light distribution of stretching direction, carry out diffuse light simultaneously and learn processing.
And Figure 10 to be symmetric form do not have suitable light-distribution LED street lamp LightTools software emulation taper seat plot of light intensity, it is circular that it is shaped as symmetry, and the central area light intensity is very strong; Radially away from the center of circle, light intensity decays rapidly with cosine-shaped.Be that most of luminous flux shines the central area, peripheral light intensity is very weak.
Figure 11 is to use the LED street lamp LightTools software emulation taper seat plot of light intensity of the directed refraction of the present invention light-distribution lens, and its shape approximation is a rectangle, and light intensity is even in the rectangular region, and is evenly linear away from the peritropous light distribution in rectangle center.
Figure 12 is to use the directed refraction of the present invention light-distribution lens LED street lamp LightTools software emulation distribution curve flux.
At the long limit C shown in the solid line 0Face, the beam angle during its light intensity 40% is:
C 0＝(225+22.5)-(135-22.5)＝135°；
At the minor face C shown in the dotted line 90Face, the beam angle during its light intensity 40% is:
C 90＝225-135＝90°。
Figure 13 uses with the engineering of the directed refraction of the present invention light-distribution lens analog simulation LED street lamp:
40% light intensity C 0Direction (the long limit of rectangle) length:
L＝2H×tan(C 0/2)＝2H×tan(135°/2)＝4.42H；
40% light intensity C 90Direction (rectangle minor face) length:
W＝2H×tan(C 90/2)＝2H×tan(90°/2)＝2H。
That is: when satisfying orientation refraction light-distribution lens LED street lamp LightTools software emulation distribution curve flux, the light distribution that street lamp projects the road surface is approximate rectangular, the long C of rectangle 0With wide C 90Ratio be: 2.41.
By the surface of intensity distribution shown in Figure 14 and distribution curve flux shown in Figure 15 as seen: measured result and analog simulation data basically identical.Its C 0Face 40% light intensity beam angle is 133 °, its C 90Face 40% light intensity beam angle is 90 °, and the strong precision control that distributes of light has realized satisfying the need.
When the light pole height is 10m, the long limit L (C of 40% light intensity road surface distribution rectangle 0) and minor face (C 90) W is:
L＝2H×tan(C 0/2)＝2H×tan(133°/2)＝46(m)
W＝2H×tan(C 90/2)＝2H×tan(90°/2)＝20(m)
The case effect conclusion:
As shown in figure 16, reflect non-imaging light-distribution lens by orientation the energy of light is redistributed, the light that led light source sent is carried out shaping and change, thereby realized the utilization of energy of light source and the orientation control of light distribution.Orientation reflects the nonimaging optics light-distribution lens, the light of led light source is oriented has been refracted to lens surface, and the LED spot light is changed becomes the lens surface uniform surface light source, has improved the light distribution uniformity; Changed lambert's characteristic of led light source, the distribution that makes LED street lamp light intensity is along with the decay that shooting angle increases is less; It is simple in structure, the collection light angle is big, utilization ratio of optical energy is high.
Analyze the directed refraction of actual measurement 150W shown in Figure 17 nonimaging optics light-distribution lens LED road lamp light distribution curve, the result is: illumination uniformity is good, does not have dazzle along the road surface, and the illumination efficiency height realizes that the lighting requirement desired power is little.

Claims (8)

1. the non-imaging optical directional light distribution method of a LED lighting source, implementation step comprises:
(1) the LED light that sends of led light source reflects through light-distribution lens, and emergent light forms the LED directional rays towards the direction refraction of setting;
(2) LED directional rays stack forms the LED directional beam;
(3) LED directional beam stack forms the LED directional light sources;
(4) multi-direction LED directional light sources stack forms the LED lighting source.
2. the non-imaging optical directional light distribution method of LED lighting source according to claim 1 is characterized in that, the formation of described LED directional rays comprises following performing step:
(1.1) according to the designing requirement of the hot spot of LED lighting source, determine LED light outgoing direction of light behind light-distribution lens, can get the angle of emergence θ of LED light behind light-distribution lens thus 4
(1.2) selected LED light is incident to the incident medium refractive index N of light-distribution lens 1, light-distribution lens refractive index N 2And the emergent medium refractive index N of LED light behind light-distribution lens 3Make LED light be incident to the incidence angle θ of light-distribution lens 1, the angle of emergence θ behind light-distribution lens 4And incident medium refractive index N 1, light-distribution lens refractive index N 2, emergent medium refractive index N 3Satisfy following functional relation:
θ 4＝sin -1(N 2sin(θ-sin -1(N 1sinθ/N 2)/N 3))，
Obtain the incidence angle θ that LED light is incident to light-distribution lens 1
(1.3) make the plane of incidence of light-distribution lens and the angle theta of exit facet, the incidence angle θ that LED light is incident to light-distribution lens 1Satisfy following relationship:
θ＝θ 1；
Obtain the angle theta of the light-distribution lens plane of incidence and exit facet, can determine the plane of incidence and the exit facet of light-distribution lens thus;
(1.4) make LED light with incidence angle θ 1Be incident to light-distribution lens, after the light-distribution lens refraction, obtain the LED directional rays.
3. the non-imaging optical directional light distribution method of LED lighting source according to claim 1 and 2 is characterized in that: described LED directional rays stack comprises that light is carried out directed enhanced optical to be handled.
4. the non-imaging optical directional light distribution method of LED lighting source according to claim 3 is characterized in that: described LED directional beam stack comprises the optical treatment that light is reflected compression.
5. the non-imaging optical directional light distribution method of LED lighting source according to claim 4, it is characterized in that: the stack of described LED directional light sources comprises that the hot spot that makes the LED lighting source is scattered in the optical treatment of rectangle, triangle, circle, semicircle, the fan-shaped or basic geometry that parabola constitutes, or makes the hot spot of LED lighting source be scattered in two optical treatment to the multiple compound shape that is combined to form by basic geometry.
6. the non-imaging optical directional light distribution method of LED lighting source according to claim 5 is characterized in that: the optical treatment of described LED directional rays stack, the stack of LED directional beam and the stack of LED directional light sources comprises diffuse light processing respectively.
7. the non-imaging optical directional light distribution method of LED lighting source according to claim 6 is characterized in that: the light spot shape that described multi-direction LED directional light sources stack formation LED lighting source is illumination index, dazzle index, luminous intensity index, light uniformity index and field of illumination according to the field of illumination designing requirement carries out luminous intensity distribution.
8. the non-imaging optical directional light distribution method of LED lighting source according to claim 7 is characterized in that: the packaged type of described led light source is the stack of COB formula, integrated form stack or module type stack.
CN200910022669XA 2009-05-22 2009-05-22 Non-imaging optical directional light distribution method for LED lighting source Expired - Fee Related CN101684917B (en)

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CN200910022669XA CN101684917B (en) 2009-05-22 2009-05-22 Non-imaging optical directional light distribution method for LED lighting source
PCT/CN2010/000739 WO2010133094A1 (en) 2009-05-22 2010-05-24 Non-imaging optical directed light distributing method for led illumination light source

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CN101684917B CN101684917B (en) 2011-04-20

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CN113677057A (en) * 2021-02-09 2021-11-19 天津九安医疗电子股份有限公司 Method and system for quickly and quantitatively adjusting beam angle of lighting device
CN113677057B (en) * 2021-02-09 2024-02-23 天津九安医疗电子股份有限公司 Method and system for rapidly and quantitatively adjusting beam angle of lighting device

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