CN101684917B - 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 PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F21V5/00—Refractors for light sources
- F21V5/02—Refractors for light sources of prismatic shape
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
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- 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]
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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
Technical Field
The invention belongs to the technical field of non-imaging optical light distribution, and particularly relates to a non-imaging optical directional light distribution method of an LED illumination light source.
Background
Functional lighting lamps such as street lamps and tunnel lamps require that the illumination of each point in the lighting range must meet the minimum illumination index, the maximum glare requirement index, the light intensity uniformity index and the illumination area limitation requirement of the lighting specification, and have high requirements on the reliability, energy conservation, environmental protection performance and the like of products. In order to improve the illumination effect and protect the health of human eyes, the optical system illumination light distribution by using the lamp is necessary, namely, in a given road position and a given road surface area, a light field with uniform illumination intensity is formed by the lamp illumination, and the light irradiating out of the given area is regarded as ineffective light.
The light distribution of the traditional illuminating lamp is mainly realized by reflecting and distributing light by virtue of the reflecting cup, so that the light is controlled in a reasonable specified area, and the uniformity of light intensity is improved. The main disadvantages of this method of light intensity distribution by reflection are the large loss of light energy and the large power consumption.
The package of a conventional LED light source is shown in fig. 1. The light intensity distribution E is proportional to the cosine of the light-emitting angle θ ', and the illuminance E formed by the light emitted by the LED light source 101 on the illuminated surface is rapidly attenuated as the light-emitting angle θ' increases. The LED light source 101 can be considered as a 180 degree light emitting Lambertian light source with a central intensity and a peripheral attenuation, as shown in fig. 2. If the characteristics of the LED light source are not subjected to secondary optical design, the light intensity distribution hardly meets the requirements of functional lighting purposes, and the existence of a large amount of ineffective light not only causes great light energy loss, but also greatly reduces the lighting effect. The analysis of the light intensity distribution curve of the conical surface at the maximum light intensity position of the existing LED street lamp is as follows:
fig. 3 is a measured light distribution curve of a 240W symmetrical type improper light distribution LED street lamp, which shows that a considerable part of light energy leaks out of the effective area frame 102. The results show that the ineffective light greatly reduces the lighting effect. In order to meet the illumination requirement, the output power of the light source can only be increased to 240W, which causes energy waste.
Fig. 4 is a measured light distribution curve of the 150W butterfly-shaped light distribution LED street lamp. The display results show that the uniformity of the illumination is poor, glare is generated along the illumination surface, and a blind area is formed in the illumination area.
LED light sources are generally classified into single light sources and multiple light sources.
The light distribution of the existing multi-light source LED illuminating lamp is that the direct projection distribution is carried out on the light intensity by adjusting the installation angles of a plurality of light sources, and the formed illuminating lamp is of a module type. The multi-light source lamp is heavy, generates multiple double images, limits power expansion and application range, and is a serious potential safety hazard for vehicles and pedestrians.
The light distribution of the existing single-light-source LED illuminating lamp is mainly simulated by a traditional lamp and light is reflected and distributed by a reflecting cup. Due to the Lambertian (Lambertian) characteristic, the reflecting cup can reflect few light rays, so that the characteristics of strong center and weak periphery of the light intensity distribution of the LED light source cannot be fundamentally improved.
Disclosure of Invention
The invention aims to provide a non-imaging optical directional light distribution method of an LED illumination light source, which solves the technical problems of poor light distribution uniformity, low lighting effect and poor illumination effect caused by incapability of fundamentally improving the Lambert characteristic of the LED light source and realizing directional light distribution in the prior art.
The technical scheme of the invention is as follows:
the invention utilizes the refraction phenomenon of light rays from the light dense substance to the light sparse substance to overcome the Lambertian characteristic of an LED light source, namely the characteristics of strong light intensity distribution center and weak periphery. The invention redistributes the energy of the LED light source through the directional refraction non-imaging light distribution lens, shapes and changes the light emitted by the LED light source, thereby realizing the full utilization of the light energy and the directional control of the light intensity distribution, and changing the LED point light source into the surface light source with uniform lens surface. The method comprises the following implementation steps:
(1) LED light emitted by the LED light source is refracted by the light distribution lens, emergent light is refracted towards a set direction, and LED directional light is formed;
(2) LED directional light rays are superposed to form LED directional light beams;
(3) superposing the LED directional light beams to form an LED directional light source;
(4) and the multi-directional LED directional light sources are overlapped to form an LED lighting source.
The formation of the directional light of the LED comprises the following implementation steps:
(1.1) according to the design requirement of light spots of the LED illumination light source, determining the direction of emergent light of the LED light after passing through the light distribution lens, thereby obtaining the emergent angle theta of the LED light after passing through the light distribution lens4；
(1.2) selecting the refractive index N of an incident medium for the LED light to enter the light distribution lens1Refractive index N of light distribution lens2And the refractive index N of an emergent medium of the LED light after passing through the light distribution lens3(ii) a Incident angle theta for enabling LED light to be incident to light distribution lens1And an exit angle theta after passing through the light distribution lens4And refractive index N of incident medium1Refractive index N of light distribution lens2Refractive index N of the outgoing medium3The following functional relationship is satisfied:
θ4＝sin-1(N2sin(θ-sin-1(N1sinθ/N2)/N3) To obtain the incident angle theta of the LED light to the light distribution lens1；
(1.3) making an included angle theta between an incident surface and an emergent surface of the light distribution lens and an incident angle theta of the LED light entering the light distribution lens1The following relationships are satisfied:
θ＝θ1；
obtaining an included angle theta between the incident surface and the emergent surface of the light distribution lens, so that the incident surface and the emergent surface of the light distribution lens can be determined;
(1.4) directing the LED light at an incident angle θ1The light is incident to the light distribution lens and is refracted by the light distribution lens to obtain LED directional light.
The LED directed light superposition described above may include optical processing to directionally enhance the light.
The above-described LED directed beam superposition may include optical processing of light by refractive compression.
The superposition of the LED directional light sources can include optical processing for distributing the light spots of the LED illumination light sources into a basic geometric shape consisting of a rectangle, a triangle, a circle, a semicircle, a sector or a parabola, or optical processing for distributing the light spots of the LED illumination light sources into a composite shape formed by two or more combinations of the basic geometric shapes.
The optical processing of the above-described LED directional light superposition, LED directional light beam superposition, and LED directional light source superposition may respectively include uniform scattering optical processing.
The LED illumination light source formed by superposing the multi-directional LED directional light sources can be used for light distribution according to the illumination index, the glare index, the light intensity index, the light uniformity index, the spot shape of the illumination area and the like required by the design of the illumination area.
The packaging mode of the LED light source can adopt COB type stacking, integrated type stacking or module type stacking and the like.
The invention has the following advantages:
1. the angle of the collected light is large, the light energy of the LED light source can be fully utilized, the lighting effect is high, the light energy loss is small, the power required by the lighting requirement is small, and therefore energy can be saved.
2. The LED light source can be directionally controlled in light intensity distribution, light rays are controlled in a specified illumination area, the uniformity of light intensity is improved, energy is saved, and the illumination effect is good.
3. The Lambert characteristic of the LED light source is fundamentally changed, so that the attenuation of the light intensity distribution of the LED light source along with the increase of the emergent angle is small, the power expansion is convenient, the LED light source is suitable for lamps with various functional lighting purposes, and the reliability of the product is high.
4. The LED point light source is changed into a surface light source with uniform lens surface, the light distribution uniformity is high, and precise light distribution control can be realized.
5. The illumination of each point in the illumination range can completely meet the requirement of illumination specification, namely, the minimum illumination index, the maximum glare requirement index, the light intensity uniformity index, the illumination area limitation requirement and the like are met.
6. The illumination area has no blind area and no glare, the illumination uniformity is high, the use is environment-friendly, and the eye health of people is facilitated. The lamp is light in weight and free of potential safety hazards in use.
7. The realization method is simple and the cost is low.
Description of the drawings:
fig. 1 illustrates a conventional packaging method of an LED light source.
Fig. 2 shows a lambertian light source with an LED light source equivalent to a light exit angle of 180 °.
FIG. 3 is a measured light distribution curve of a conventional 240W symmetrical LED street lamp without proper light distribution,
wherein,
(a) a meridian plane light distribution curve;
(b) the light intensity distribution curve of the conical surface at the maximum light intensity is shown.
FIG. 4 is a measured light distribution curve of a prior 150W butterfly-type light distribution LED street lamp,
wherein,
(a) a meridian plane light distribution curve;
(b) the light intensity distribution curve of the conical surface at the maximum light intensity is shown.
FIG. 5 is a schematic optical diagram of a directional refractive plane of the present invention.
FIG. 6 is a schematic view of the directional light scattering refraction of the light distribution lens of the invention.
FIG. 7 is a schematic view of the refraction of the directional beam of the light distribution lens of the present invention.
FIG. 8 is a schematic view of the directional strip refraction of the light distribution lens of the present invention.
FIG. 9 is a schematic structural diagram of a directional refractive light distribution lens of the present invention designed by Pro/Engineer software.
Fig. 10 is a simulated conical surface luminous intensity diagram of LightTools software of a conventional symmetric LED street lamp without proper light distribution.
Fig. 11 is a simulated conical surface luminous intensity diagram of LightTools software of an LED street lamp using the directional refraction light distribution lens of the invention.
Detailed Description
Fig. 12 is a light distribution curve simulated by LightTools software of an LED street lamp using the directional refraction light distribution lens of the invention.
FIG. 13 is a schematic diagram of an engineering application of the directional refraction light distribution lens of the invention to simulate an LED street lamp.
FIG. 14 is a measured light distribution diagram for an LED street lamp using a directional refractive non-imaging optical light distribution lens of the present invention.
FIG. 15 is a measured light distribution curve of an LED street lamp using the directional refractive non-imaging optical light distribution lens of the present invention,
wherein,
(a) a meridian plane light distribution curve;
(b) the light intensity distribution curve of the conical surface at the maximum light intensity is shown.
FIG. 16 is a comparison graph of LED street lamps of the same power and the same light source and different lens conditions,
wherein,
(a) the LED street lamp is a common LED street lamp with a uniform-thickness lens;
(b) the LED street lamp is a directional refraction lens LED street lamp;
(c) is a common equal thickness lens;
(d) is a directional refractive lens.
FIG. 17 shows the measured 150W light distribution curve of an LED street lamp using the directional refraction non-imaging optical light distribution lens of the invention,
wherein,
(a) a meridian plane light distribution curve;
(b) the light intensity distribution curve of the conical surface at the maximum light intensity is shown.
The directional refraction principle of the light distribution lens of the invention is as follows:
(i) snell's law: light incident on interfaces of different media is reflected and refracted. Wherein the incident light and the refracted light are located on the same plane, and the included angle with the normal line of the interface satisfies the following relation:
snell's formula Nmsinθm＝Nnsinθn，
Wherein N ism、NnAre the refractive indices of the two media, theta, respectivelymAnd thetanRespectively angle of incidence and angle of refraction.
(ii) The directional refraction principle of the light distribution lens is as follows:
as shown in FIG. 5, the incident medium refractive index N of the light distribution lens1Refractive index N of light distribution lens2The refractive index N of an emergent medium of the LED light after passing through the light distribution lens3(ii) a Incident angle theta of LED light incident to light distribution lens1Angle of refraction theta after incidence on the light distribution lens2Angle of incidence θ of light emitted to the emission medium3And an exit angle theta after passing through the light distribution lens4(ii) a And an included angle theta between the incident surface and the emergent surface of the light distribution lens. Refractive index N of the lens body 20321.56; when the incident medium and the exit medium of the lens body 203 are both air, the refractive index N of the incident medium1Refractive index N of the outgoing medium3＝1。
When the light of the LED light source is incident to the lens body 203 from the air, N2＞N1(ii) a Then theta1＞θ2The light is refracted to the normal; when light is emitted from the lens body 203 into the air, N2＞N3Then theta4＞θ3The light rays being refracted away from normal by an angle theta4。∵θ1＝θ，
N1sinθ1＝N2sinθ2
sinθ2＝N1sinθ1/N2
θ2＝sin-1(N1sinθ1/N2)＝sin-1(N1sinθ/N2)
θ3＝θ1-θ2＝θ-θ2＝θ-sin-1(N1sinθ/N2)
N3sinθ4＝N2sinθ3
sinθ4＝N2sinθ3/N3
θ4＝sin-1(N2sinθ3/N3)
I.e. theta4＝sin-1(N2sin(θ-sin-1(N1sinθ/N2)/N3))
If theta is 30 DEG
Then theta4＝sin-1(1.56sin(30°-sin-1(sin30°/1.56)))＝18°
(iii) Directional light scattering refraction of the light distribution lens: as shown in fig. 6, after LED light of a lambertian light source with an equivalent light-emitting angle of 180 ° passes through the directional light-scattering tooth-shaped lens, the light is refracted toward a direction perpendicular to the tooth shape and away from the center, so that the distribution shape of the light field can be changed, the light intensity in the refraction direction is increased, the light intensity in other directions is reduced, and uniform scattering optical treatment can be performed.
(iv) And (3) refracting the directional beam of the light distribution lens: as shown in fig. 7, after LED light of a lambertian light source with an equivalent light-emitting angle of 180 ° passes through the directional beam optical tooth-shaped lens, the light is refracted toward a direction perpendicular to the tooth shape and toward the center, so that the distribution shape of the light field can be changed, the light intensity in the refraction direction is increased, the light intensity in other directions is reduced, and the light irradiated to the outside of the effective illumination area can be refracted, compressed and uniformly processed.
(v) The light distribution lens is subjected to zonal directional astigmatism refraction: as shown in fig. 8, after LED light of a lambertian light source equivalent to a 180 ° light-emitting angle passes through the tooth-shaped directional strip-shaped refractive lens, the light is refracted in a direction perpendicular to the strip-shaped direction, so that the light field is distributed in a strip-shaped shape, the light intensity in the strip-shaped direction is increased, the light intensity in other directions is decreased, and light can be uniformly processed.
The invention specifically realizes the following steps:
(1) LED light emitted by the LED light source is refracted through the light distribution lens, emergent light is refracted towards a set direction, and LED directional light is formed. The formation of the directional light of the LED comprises the following implementation steps:
(1.1) light spots according to LED illumination light sourcesThe design requirement of (1) determines the direction of emergent light of the LED light after passing through the light distribution lens, thereby obtaining the emergent angle theta of the LED light after passing through the light distribution lens4。
(1.2) selecting the refractive index N of an incident medium for the LED light to enter the light distribution lens1Refractive index N of light distribution lens2And the refractive index N of an emergent medium of the LED light after passing through the light distribution lens3(ii) a Incident angle theta for enabling LED light to be incident to light distribution lens1And an exit angle theta after passing through the light distribution lens4And refractive index N of incident medium1Refractive index N of light distribution lens2Refractive index N of the outgoing medium3The following functional relationship is satisfied:
θ4＝sin-1(N2sin(θ-sin-1(N1sinθ/N2)/N3))，
obtaining the incident angle theta of the LED light incident to the light distribution lens1。
(1.3) making an included angle theta between an incident surface and an emergent surface of the light distribution lens and an incident angle theta of the LED light entering the light distribution lens1Satisfies the relationship: theta is equal to theta1The included angle theta between the incident surface and the emergent surface of the light distribution lens is obtained, so that the incident surface and the emergent surface of the light distribution lens can be determined.
(1.4) directing the LED light at an incident angle θ1The light is incident to the light distribution lens and is refracted by the light distribution lens to obtain LED directional light.
(2) And the LED directional light rays are superposed to form an LED directional light beam. LED directed light superposition may also include optical processing to directionally enhance the light.
(3) And the LED directional light beams are superposed to form an LED directional light source. The LED directed beam superposition may also include optical processing of the light by refractive compression.
(4) And the multi-directional LED directional light sources are overlapped to form an LED lighting source. The LED directed light source superposition may include an optical process of distributing the light spots of the LED illumination sources into a basic geometry consisting of a rectangle, triangle, circle, semicircle, fan, or parabola, or an optical process of distributing the light spots of the LED illumination sources into a complex shape formed by two to more combinations of the basic geometries. The optical processing of LED directed light superposition, LED directed light beam superposition, and LED directed light source superposition may each comprise uniform scattering optical processing. The LED illumination light source formed by superposing the multi-directional LED directional light sources can be subjected to light distribution according to the illumination index, the glare index, the light intensity index, the light uniformity index, the spot shape of the illumination area and the like required by the design of the illumination area.
The packaging mode of the LED light source can adopt COB type stacking, integrated type stacking or module type stacking and the like.
The light distribution lens can be made of glass materials, PC materials or PMMA materials. The glass material has the characteristics of high temperature resistance, high penetration rate and the like. The PC material is a polycarbonate material, and the PMMA material is a polymethyl methacrylate material, and the two materials have high penetration rate, are easy to realize aspheric surface condensation, reduce the yellow and faint spot phenomenon of light spots, can also enable the product to be injection molded, and enable the production cost to be low. The lens body 203 may also be made of transparent PS material, i.e. transparent polystyrene material, commonly known as transparent benzene.
The invention relates to an example of an analog simulation illuminating lamp using a directional refraction non-imaging optical light distribution lens, which comprises the following steps:
the invention is used for combining the directional refraction light distribution lenses in different directions to distribute the light of the projection light of the LED light source, so that the light distribution can meet the requirements of practical application.
FIG. 9 is a directional refraction light distribution lens of an LED lamp designed by Pro/Engineer software, wherein the light intensity distribution completely meets the requirement of the road illumination light intensity distribution. According to the shape of the road, the light intensity distribution of useless parts except the roadside and the roof is refracted and compressed, the useful light intensity distribution of the road in the extending direction is refracted and enhanced, and meanwhile, the uniform scattering optical treatment is carried out.
FIG. 10 is a light intensity diagram of a conical surface simulated by the symmetric LED street lamp LightTools without proper light distribution, wherein the shape of the diagram is a symmetric circle, and the light intensity of a central zone is strong; radially away from the center of the circle, the light intensity decays rapidly in a cosine shape. I.e. most of the light flux hits the central zone and the intensity of the light is very weak at the periphery.
Fig. 11 is a light intensity diagram of a conical surface simulated by using the light intensity tools software of the LED street lamp using the directional refraction light distribution lens of the present invention, wherein the shape of the light intensity diagram is approximately rectangular, the light intensity in the rectangular area is uniform, and the light intensity distribution from the center of the rectangle to the periphery is linear and uniform.
Fig. 12 is a light distribution curve simulated by using the directional refraction light distribution lens LED street lamp LightTools software of the present invention.
At the long side C shown by the solid line0The light-emitting angle of the surface when the light intensity is 40 percent is as follows:
C0＝(225+22.5)-(135-22.5)＝135°；
at short side C shown by dotted line90The light-emitting angle of the surface when the light intensity is 40 percent is as follows:
C90＝225-135＝90°。
FIG. 13 is an engineering application of the directional refraction light distribution lens of the present invention to simulate an LED street lamp:
40% light intensity C0Length of direction (long side of rectangle):
L＝2H×tan(C0/2)＝2H×tan(135°/2)＝4.42H；
40% light intensity C90Length of direction (rectangular short side):
W＝2H×tan(C90/2)＝2H×tan(90°/2)＝2H。
namely: when the simulation light distribution curve of the directional refraction light distribution lens LED street lamp LightTools software is met, the light intensity distribution of the street lamp projected to the road surface is approximately rectangular, and the length C of the rectangle0And width C90The proportion is as follows: 2.41.
from the figureThe intensity distribution graph shown in fig. 14 and the light distribution curve shown in fig. 15 show that: the actual measurement result is basically consistent with the simulation data. It C0Face 40% intensity beam angle 133 °, C90The beam angle of 40% light intensity on the surface is 90 degrees, and the precise control of the light intensity distribution of the road lamp is realized.
When the height of the street lamp pole is 10m, the long side L (C) of the rectangular road surface with 40 percent of light intensity distribution0) And short side (C)90) W is:
L＝2H×tan(C0/2)＝2H×tan(133°/2)＝46(m)
W＝2H×tan(C90/2)＝2H×tan(90°/2)＝20(m)
conclusion of the examples:
as shown in fig. 16, the energy of the light is redistributed by the directional refraction non-imaging light distribution lens, and the light emitted by the LED light source is shaped and changed, so that the utilization of the light source energy and the directional control of the light intensity distribution are realized. The directional refraction non-imaging optical light distribution lens is used for directionally refracting light rays of the LED light source to the surface of the lens, so that the LED point light source is changed into a surface light source with uniform lens surface, and the uniformity of light intensity distribution is improved; the Lambert characteristic of the LED light source is changed, so that the attenuation of the light intensity distribution of the LED street lamp is smaller along with the increase of the emergent angle; the structure is simple, the angle of the collected light is large, and the utilization rate of the light energy is high.
The light distribution curve of the actually measured 150W directional refraction non-imaging optical light distribution lens LED street lamp shown in fig. 17 is analyzed, and the result is: the lighting uniformity is good, glare is not generated along a road surface, the lighting efficiency is high, and the power required by lighting requirements is low.
Claims (7)
1. A non-imaging optical directional light distribution method of an LED illumination light source comprises the following implementation steps:
(1) LED light emitted by the LED light source is refracted by the light distribution lens, emergent light is refracted towards a set direction, and LED directional light is formed;
(2) LED directional light rays are superposed to form LED directional light beams;
(3) superposing the LED directional light beams to form an LED directional light source;
(4) superposing multi-directional LED directional light sources to form an LED illumination light source;
the LED directional light forming method in the step (1) specifically comprises the following implementation steps:
(1.1) according to the design requirement of light spots of the LED illumination light source, determining the direction of emergent light of the LED light after passing through the light distribution lens, thereby obtaining the emergent angle theta of the LED light after passing through the light distribution lens4；
(1.2) selecting the refractive index N of an incident medium for the LED light to enter the light distribution lens1Refractive index N of light distribution lens2And the refractive index N of an emergent medium of the LED light after passing through the light distribution lens3(ii) a Incident angle theta for enabling LED light to be incident to light distribution lens1And an exit angle theta after passing through the light distribution lens4And refractive index N of incident medium1Refractive index N of light distribution lens2Refractive index N of the outgoing medium3The following functional relationship is satisfied:
θ4＝sin-1(N2sin(θ-sin-1(N1sinθ/N2)/N3) To obtain the incident angle theta of the LED light to the light distribution lens1；
(1.3) making an included angle theta between an incident surface and an emergent surface of the light distribution lens and an incident angle theta of the LED light entering the light distribution lens1The following relationships are satisfied:
θ＝θ1；
obtaining an included angle theta between the incident surface and the emergent surface of the light distribution lens, so that the incident surface and the emergent surface of the light distribution lens can be determined;
(1.4) directing the LED light at an incident angle θ1The light is incident to the light distribution lens and is refracted by the light distribution lens to obtain LED directional light.
2. The non-imaging optical directional light distribution method of the LED illumination light source according to claim 1, characterized in that: the LED directional light superposition comprises optical processing for directional enhancement of light.
3. The non-imaging optical directional light distribution method of the LED illumination light source according to claim 2, characterized in that: the LED directional light beam superposition comprises optical processing of refraction and compression of light.
4. The non-imaging optical directional light distribution method of the LED illumination light source according to claim 3, characterized in that: the LED directional light source superposition comprises optical processing for distributing light spots of the LED illumination light source into a basic geometric shape formed by a rectangle, a triangle, a circle, a semicircle, a fan or a parabola, or optical processing for distributing the light spots of the LED illumination light source into a composite shape formed by combining two or more basic geometric shapes.
5. The non-imaging optical directional light distribution method of the LED illumination light source according to claim 4, characterized in that: the optical processing of LED directional light superposition, LED directional light beam superposition and LED directional light source superposition respectively comprises uniform scattering optical processing.
6. The non-imaging optical directional light distribution method of the LED illumination light source according to claim 5, characterized in that: the LED illumination light source formed by superposing the multi-direction LED directional light sources is distributed according to the illumination index, the glare index, the light intensity index, the light uniformity index and the light spot shape of the illumination area required by the design of the illumination area.
7. The non-imaging optical directional light distribution method of the LED illumination light source according to claim 6, characterized in that: the packaging mode of the LED light source is COB type stacking, integrated type stacking or module type stacking.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN200910022669XA CN101684917B (en) | 2009-05-22 | 2009-05-22 | Non-imaging optical directional light distribution method for LED lighting source |
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| CN101684917B (en) * | 2009-05-22 | 2011-04-20 | 西安智海电力科技有限公司 | Non-imaging optical directional light distribution method for LED lighting source |
| CN101684918A (en) * | 2009-05-22 | 2010-03-31 | 西安智海电力科技有限公司 | Non-imaging optical directional light distribution lens of LED light source |
| CN102890342B (en) * | 2012-10-23 | 2014-11-12 | 浙江大学 | Method for designing free-form surface optical element for point light source distribution |
| CN107795894A (en) * | 2016-08-30 | 2018-03-13 | 欧普照明股份有限公司 | A kind of LED light device |
| CN109445093B (en) * | 2018-10-29 | 2020-05-12 | 浙江大学 | LED free-form surface lens array device for uniform illumination of inclined plane |
| CN112954846B (en) * | 2021-02-09 | 2021-10-15 | 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 |
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