CN104214669B - LED floodlight and its light-distribution lens - Google Patents
LED floodlight and its light-distribution lens Download PDFInfo
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- CN104214669B CN104214669B CN201310211590.8A CN201310211590A CN104214669B CN 104214669 B CN104214669 B CN 104214669B CN 201310211590 A CN201310211590 A CN 201310211590A CN 104214669 B CN104214669 B CN 104214669B
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Abstract
A kind of light-distribution lens, including bottom surface and top surface.Top surface is free form surface, and bottom surface is circular flat, and the edge of bottom surface is fixedly connected with the edge of top surface, and the optical axis of light-distribution lens passes through the center of bottom surface and top surface.The center of bottom surface caves inward, and forms groove, and groove is rotational symmetry structure, and the side wall of groove is the plane of incidence.The light that LED chip sends can be incident from the plane of incidence.According to refraction principle, light is by meeting after the plane of incidence to both sides deviation.Light by after the plane of incidence, from top surface outgoing.Due to light from optically denser medium directive optically thinner medium when, the angle of emergence can be more than incidence angle so that light is further to both sides deviation.Therefore, by after deviation twice, the light that LED chip sends can be in the bigger angular range of directive, so as to obtain larger floodlight angle.Additionally, the present invention also provides a kind of LED floodlight.
Description
Technical field
The present invention relates to lighting engineering, more particularly to a kind of LED floodlight and its light-distribution lens.
Background technology
LED light source has energy-saving and environmental protection, safety, colour rendering index high, long lifespan, small volume, that light efficiency is high, energy consumption is small etc. is aobvious
Work feature.With LED chip and the maturation of packaging technology, the brightness of LED light source is sufficient for the demand of each lighting field,
LED illumination has become.
However, LED light source is different from the omnidirectional conventional light source such as incandescent lamp, metal halid lamp, LED light source is by its chip
The luminous diversity of the structures shape of encapsulation.Therefore, when LED light source being applied into ring type Flood lamps and lanternses, generally require into
Row secondary light-distribution is designed.Traditional luminous intensity distribution typically uses reflector, but treatment of the reflector to light type is less desirable, and light fixture goes out
Optic angle is determined by the angle of reflector opening, so that the floodlight angle of light fixture is smaller.
The content of the invention
Based on this, it is necessary to provide a kind of larger LED floodlight of floodlight angle and its light-distribution lens.
A kind of light-distribution lens, are rotational symmetry structure, and the light-distribution lens include bottom surface and top surface, and the top surface is for freely
Curved surface, the bottom surface is circular flat, and the edge of the bottom surface is fixedly connected with the edge of the top surface, the light-distribution lens
Optical axis caves inward through the bottom surface and the center of the top surface, the center of the bottom surface, forms groove, and the groove is rotation
Turn symmetrical structure, the side wall of the groove is the plane of incidence, and the plane of incidence is arc surface；
The shape of the top surface is obtained by following formula：
N=Nxi+Nyj+Nzk；
A=Axi+Ayj+Azk；A '=Bxi+Byj+Bzk;
Wherein, A is incident ray vector, and A ' is emergent ray vector, and N is the normal vector of free form surface.Will be freely bent
Face is divided into multiple grid nodes, according to incident ray, emergent ray and snell law, freedom is obtained by way of iteration
Surface mesh node normal vector coordinate, the shape of free form surface just can be constructed by the normal vector coordinate.
Wherein in one embodiment, the bottom surface is frosting, and bottom surface can occur diffusing reflection described in light directive.
Wherein in one embodiment, the light-distribution lens are made up of polymethyl methacrylate.
Wherein in one embodiment, the bottom surface is that the plane for being formed is rotated around optical axis by line segment A, and the top surface is served as reasons
Free curve B rotates the free form surface to be formed around optical axis, and the plane of incidence is that the circular arc for being formed is rotated around optical axis by circular arc line C
Face；
With the center of bottom surface as origin, optical axis as X-axis and form the bottom surface line segment where straight line as Y-axis
In coordinate system, the coordinate of two end points of line segment A is respectively a1（0,13.98）And a2（0, -13.98）；The end points of free curve B is
a1（0,13.98）And a2（0, -13.98）, and also passing point b1（2.64,11.54）、b2（5.84,6.1）、b3（7.24,0）、b4
（5.84, -6.1）And b5（2.64, -11.54）；The coordinate of two end points of circular arc line C is respectively c1（0,6.72）、c2（0 ,-
6.72）, and circular arc line C also passing point c3（4.35,4.06）、c4（6.78,0）And c5（4.35, -4.06）.
A kind of LED floodlight, including：
Light-distribution lens as any one of above-mentioned preferred embodiment；And
LED chip, is fixed on the edge of the groove, and its luminous site is in the groove, in the LED chip
The center superposition of the heart and the bottom surface.
Wherein in one embodiment, the illuminating part of the LED chip is spherical, while radius of curvature and the plane of incidence
Radius of curvature it is identical.
Above-mentioned light-distribution lens and the LED floodlight comprising the light-distribution lens, the light that LED chip sends enter from the plane of incidence
Penetrate.According to refraction principle, light is by meeting after the plane of incidence to both sides deviation.Light by after the plane of incidence, from top surface outgoing.Due to
Light from optically denser medium directive optically thinner medium when, the angle of emergence can be more than incidence angle so that light is further to both sides deviation.
Therefore, by after deviation twice, the light that LED chip sends can be in the bigger angular range of directive, so that above-mentioned LED is general
The floodlight angle increase of light lamp.
Brief description of the drawings
Fig. 1 is the structural representation of LED floodlight in present pre-ferred embodiments；
Fig. 2 is the structural representation of light-distribution lens in the inclined shot-lights of LED shown in Fig. 1；
Fig. 3 is the coordinate schematic diagram of light-distribution lens in plane right-angle coordinate；
Fig. 4 is the scale diagrams of light-distribution lens shown in Fig. 2；
Fig. 5 is the intense part figure of the inclined shot-lights of LED shown in Fig. 1.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give presently preferred embodiments of the present invention.But, the present invention can be realized in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is to make the understanding to the disclosure more thorough
Comprehensively.
It should be noted that when element is referred to as " being fixed on " another element, it can directly on another element
Or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or may be simultaneously present centering elements.
Unless otherwise defined, all of technologies and scientific terms used here by the article with belong to technical field of the invention
The implication that technical staff is generally understood that is identical.The term for being used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more phases
The arbitrary and all of combination of the Listed Items of pass.
Fig. 1 is referred to, the LED floodlight 10 in present pre-ferred embodiments includes light-distribution lens 100 and LED chip 101.
Also referring to Fig. 2, light-distribution lens 100 are rotational symmetry structure.Light-distribution lens 100 include bottom surface 110 and top surface
120.Top surface 120 is free form surface, and bottom surface 110 is circular flat, and the edge of bottom surface 110 is fixedly connected with the edge of top surface 120.
The optical axis of light-distribution lens 100 passes through the center of bottom surface 110 and top surface 120.
The center of bottom surface 110 caves inward, and forms groove 130.Groove 130 is rotational symmetry structure, the side wall of groove 130
It is the plane of incidence 131.Specifically, LED chip 101 is fixed on the edge of groove 130, and its luminous site in groove 130.LED
The center of chip 101 and the center superposition of bottom surface 110.The plane of incidence 131 is arc surface.Specifically in the present embodiment, LED chip
101 illuminating part is spherical, while radius of curvature is identical with the radius of curvature of the plane of incidence 131.
As shown in figure 1, the light that LED chip 101 sends is incident from the plane of incidence 131.According to refraction principle, light is by entering
Meeting is to both sides deviation after penetrating face 131.Light by after the plane of incidence, from the outgoing of top surface 120.Due to light from optically denser medium directive light
When dredging medium, the angle of emergence can be more than incidence angle, so that light is further to both sides deviation.Therefore, by after deviation twice,
The light that LED chip 101 sends can be in the bigger angular range of directive, so that the floodlight angle increase of LED floodlight 10.
In light-distribution lens 100 shape of the free form surface of top surface 120 according to the relation of incident ray and emergent ray and
Snell law is tried to achieve, and concrete mode is as follows：
N=Nxi+Nyj+Nzk；
A=Axi+Ayj+Azk；A '=Bxi+Byj+Bzk；
Wherein, A is incident ray vector, and A ' is emergent ray vector, and N is normal vector.Free form surface is divided into many
Individual grid node, according to incident ray, emergent ray and snell law, obtains free form surface grid section by way of iteration
Point normal vector coordinate, the shape of free form surface just can be constructed by the coordinate points obtained.Specifically, seeking top surface 120
During shape, the vector representation of emergent ray is obtained according to the demand to the illumination patterns of LED floodlight 10, further according to the reversible original of light
Reason, obtains the vector representation of incident ray, and substituting into above formula just can try to achieve the shape of top surface 120.
Also referring to Fig. 3, in the present embodiment, bottom surface 110 is that the plane for being formed, top surface are rotated around optical axis by line segment A
120 is that the free form surface for being formed is rotated around optical axis by free curve B, and the plane of incidence 131 is rotated around optical axis by circular arc line C and formed
Arc surface.
With the center of bottom surface 110 as origin, optical axis as X-axis and formed bottom surface 110 line segment where straight line as Y-axis
Coordinate system in, the coordinate of two end points of line segment A is respectively a1（0,13.98）And a2（0, -13.98）.The end points of free curve B
It is a1（0,13.98）And a2（0, -13.98）, and also passing point b1（2.64,11.54）、b2（5.84,6.1）、b3（7.24,0）、
b4（5.84, -6.1）And b5（2.64, -11.54）.The coordinate of two end points of circular arc line C is respectively c1（0,6.72）、c2（0 ,-
6.72）, and circular arc line C also passing point c3（4.35,4.06）、c4（6.78,0）And c5（4.35, -4.06）.
Further, also referring to Fig. 4, in the present embodiment, a diameter of 27.96 millimeters of bottom surface 110, groove 130
Width be 13.44 millimeters, the depth of groove 130 is 6.78 millimeters, and the height of light-distribution lens 100 is 7.24 millimeters.
When light-distribution lens 100 meet above-mentioned parameter, the illumination patterns of the inclined shot-lights 10 of LED are as shown in Figure 5.Wherein, light intensity
Distribution map polar coordinates（ρ, θ）Represent, wherein ρ values（2、15.....35）Represent light intensity value, θ values（0、10...180）Represent
Optic angle.
It can be seen that by after the luminous intensity distribution of light-distribution lens 100, the beam angle of LED chip 101 can reach 200 degree of scope.
Therefore, the light that LED chip 101 sends is after lens are reflected twice, and the outgoing angular divergence of light becomes big, left by one 120 degree
Right Lambertian LED illuminator becomes a beam angle and is 200 degree of illuminator, so as to increase the floodlight angle of LED floodlight 10.
Additionally, the light intensity value of LED chip 101 by center to gradually increasing in the range of 60 degree, therefore the uniformity of the luminous intensity distribution of light-distribution lens 100 compared with
It is good.
It is pointed out that during above-mentioned parameter is only a preferred embodiment of the present invention.Those skilled in the art are according to this
Common knowledge in field, above-mentioned parameter modified in error allowed band can't influence light-distribution lens 100
Light distribution effect.
In the present embodiment, bottom surface 110 is frosting, and light directive bottom surface 110 can occur diffusing reflection.Due in the plane of incidence
131 and top surface 120 at light may reflect, and reflect light then can directive bottom surface 110.And because bottom surface 110 is mill
Sand face.Therefore, light is totally reflected in bottom surface 110 so that the light for reflecting is projected to top surface 120 again, so as to carry
The utilization rate of light high.
In the present embodiment, light-distribution lens 100 are made up of polymethyl methacrylate.The refraction of polymethyl methacrylate
Rate is bigger than air, and polymethyl methacrylate belongs to polyester material, has the advantages that intensity is high, light weight.Therefore, use
The light-distribution lens 100 that polymethyl methacrylate is made are durable.It is pointed out that in other embodiments, luminous intensity distribution is saturating
Mirror 100 can be also made using other transparent and refractive indexes more than the material of air.
Light-distribution lens 100 and the LED floodlight 10 comprising light-distribution lens 100, the light that LED chip 101 sends is from incidence
Face 131 is incident.According to refraction principle, light is by meeting after the plane of incidence 131 to both sides deviation.Light by after the plane of incidence, from top
The outgoing of face 120.Due to light from optically denser medium directive optically thinner medium when, the angle of emergence can be more than incidence angle so that light enters
One step is to both sides deviation.Therefore, by the way that after deviation twice, the light that LED chip 101 sends can the bigger angular range of directive
It is interior, so that the floodlight angle increase of LED floodlight 10.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Shield scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (5)
1. a kind of light-distribution lens, are rotational symmetry structure, and the light-distribution lens include bottom surface and top surface, and the top surface is freely bent
Face, the bottom surface is circular flat, and the edge of the bottom surface is fixedly connected with the edge of the top surface, the light of the light-distribution lens
Axle passes through the center of the bottom surface and the top surface, it is characterised in that the center of the bottom surface caves inward, and forms groove, institute
Groove is stated for rotational symmetry structure, the side wall of the groove is the plane of incidence, and the plane of incidence is arc surface；
The shape of the top surface is obtained by following formula：
N=Nxi+Nyj+Nzk；
A=Axi+Ayj+Azk；A '=Bxi+Byj+Bzk；
Wherein, A is incident ray vector, and A ' is emergent ray vector, and N is the normal vector of free form surface；Free form surface is drawn
It is divided into multiple grid nodes, according to incident ray, emergent ray and snell law, free form surface is obtained by way of iteration
Grid node normal vector coordinate, the shape of free form surface just can be constructed by the normal vector coordinate；
The bottom surface is that the plane for being formed is rotated around optical axis by line segment A, and the top surface is to be rotated to be formed around optical axis by free curve B
Free form surface, the plane of incidence is that the arc surface for being formed is rotated around optical axis by circular arc line C；
With the center of bottom surface as origin, optical axis as X-axis and form the bottom surface line segment where coordinate of the straight line as Y-axis
In system, the coordinate of two end points of line segment A is respectively a1 (0,13.98) and a2 (0, -13.98)；The end points of free curve B is a1
(0,13.98) and a2 (0, -13.98), and also passing point b1 (2.64,11.54), b2 (5.84,6.1), b3 (7.24,0), b4
(5.84, -6.1) and b5 (2.64, -11.54)；The coordinate of two end points of circular arc line C be respectively c1 (0,6.72), c2 (0 ,-
, and circular arc line C also passing point c3 (4.35,4.06), c4 (6.78,0) and c5 (4.35, -4.06) 6.72).
2. light-distribution lens according to claim 1, it is characterised in that the bottom surface is frosting, bottom described in light directive
Face can occur diffusing reflection.
3. light-distribution lens according to claim 1, it is characterised in that the light-distribution lens are by polymethyl methacrylate
It is made.
4. a kind of LED floodlight, it is characterised in that including：
Light-distribution lens as described in above-mentioned any one of claims 1 to 3；And
LED chip, is fixed on the edge of the groove, and its luminous site is in the groove, the center of the LED chip with
The center superposition of the bottom surface.
5. LED floodlight according to claim 4, it is characterised in that the illuminating part of the LED chip is spherical, and bent
Rate radius is identical with the radius of curvature of the plane of incidence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310211590.8A CN104214669B (en) | 2013-05-30 | 2013-05-30 | LED floodlight and its light-distribution lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310211590.8A CN104214669B (en) | 2013-05-30 | 2013-05-30 | LED floodlight and its light-distribution lens |
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| Publication Number | Publication Date |
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| CN104214669A CN104214669A (en) | 2014-12-17 |
| CN104214669B true CN104214669B (en) | 2017-06-27 |
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| CN201310211590.8A Active CN104214669B (en) | 2013-05-30 | 2013-05-30 | LED floodlight and its light-distribution lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115183202B (en) * | 2022-07-20 | 2024-07-19 | 厦门大学 | Diffuse reflection type laser lighting device |
| CN115325470B (en) * | 2022-08-08 | 2023-06-16 | 重庆绿色科技开发（集团）有限公司 | Manufacturing five-primary-color full-spectrum multi-color temperature light source by red, green, blue, yellow and white LED light mixing technology |
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|---|---|---|---|---|
| CN101440928A (en) * | 2007-11-19 | 2009-05-27 | 胡晓兵 | Free curved surface lens |
| CN101504123A (en) * | 2009-03-13 | 2009-08-12 | 华南理工大学 | Lens used for LED indoor lamp and grille lamp comprising the same |
| CN202660408U (en) * | 2012-07-19 | 2013-01-09 | 陈旺松 | Single light-emitting diode (LED) secondary optical lens lamp |
| CN202884796U (en) * | 2012-03-19 | 2013-04-17 | 郎欢标 | LED backlight illuminating system, LED backlight system and secondary optical lens for planar liquid crystal display |
| CN103062707A (en) * | 2011-10-18 | 2013-04-24 | 一品光学工业股份有限公司 | Light-emitting diode lens and light source device thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009152142A (en) * | 2007-12-21 | 2009-07-09 | Panasonic Electric Works Co Ltd | Light-emitting element unit, and surface light-emitting unit equipped with a plurality of these |
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2013
- 2013-05-30 CN CN201310211590.8A patent/CN104214669B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101440928A (en) * | 2007-11-19 | 2009-05-27 | 胡晓兵 | Free curved surface lens |
| CN101504123A (en) * | 2009-03-13 | 2009-08-12 | 华南理工大学 | Lens used for LED indoor lamp and grille lamp comprising the same |
| CN103062707A (en) * | 2011-10-18 | 2013-04-24 | 一品光学工业股份有限公司 | Light-emitting diode lens and light source device thereof |
| CN202884796U (en) * | 2012-03-19 | 2013-04-17 | 郎欢标 | LED backlight illuminating system, LED backlight system and secondary optical lens for planar liquid crystal display |
| CN202660408U (en) * | 2012-07-19 | 2013-01-09 | 陈旺松 | Single light-emitting diode (LED) secondary optical lens lamp |
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| Publication number | Publication date |
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| CN104214669A (en) | 2014-12-17 |
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