CN102901041A - LED (Light-Emitting Diode) lens and LED lamp provided with same - Google Patents
LED (Light-Emitting Diode) lens and LED lamp provided with same Download PDFInfo
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- CN102901041A CN102901041A CN2011102137289A CN201110213728A CN102901041A CN 102901041 A CN102901041 A CN 102901041A CN 2011102137289 A CN2011102137289 A CN 2011102137289A CN 201110213728 A CN201110213728 A CN 201110213728A CN 102901041 A CN102901041 A CN 102901041A
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Abstract
The invention relates to an LED (Light-Emitting Diode) lens and an LED lamp provided with the same. The LED lens is provided with a top end face, a bottom end face and a rotary side face, wherein the bottom end face is provided with a semispherical concave spherical face; a conical concave face is arranged in the middle of the top end face; the generatrix of the rotary side face is a folding line; and the folding line comprises five straight-line sections which are connected in sequence. The LED lamp is provided with the LED lens. The bottom end face of the LED lens is provided with the concave spherical face and the top end face is provided with the conical concave face; light of a smaller light-emitting angle of an LED light source is refracted by the concave spherical face and the light-emitting angle is amplified for the first time; after the light is refracted by the conical concave face of the top face, the light-emitting angle is amplified for the second time; after the second time of amplification, stronger light which is close to an axis part is dispersed to the periphery, so that the problem that the strength of the light which is close to the axis part of the LED light source is greater is solved, and the more uniform floodlight light distribution can be realized.
Description
Technical field
The present invention relates to the light-distribution lens of lighting, more particularly, the LED light fixture that relates to a kind of LED lens and have these lens.
Background technology
When adopting led light source to carry out floodlighting, the general reflector that adopts carries out luminous intensity distribution to led light source, but the light distribution effect of this mode is not very desirable, this be because, the beam intensity ratio of the axial ray part of led light source is larger, but this part light can not pass through the reflector luminous intensity distribution, so the floodlight allotted of reflector, and the light intensity that mid portion always can occur is higher.
In order to obtain comparatively uniformly floodlight luminous intensity distribution, also have and adopt concavees lens that led light source is carried out luminous intensity distribution, but this mode is lower to the utilization rate of the luminous flux of led light source, shows that the larger light of light emitting anger of led light source can't be utilized, and finally causes the light efficiency utilization rate of light fixture too low.
In addition, also has a class floodlight total-reflection lens, to improve on the basis of the optically focused total reflection lens of led light source, as shown in Figure 1, make the effect that densely covered netted small salient point or concave spherical surface structure realize floodlight at the exit facet 1 of lens, also have and adopt the exit facet frosted to process, the floodlight effect that these processing modes reach is all even not, the floodlight angle is generally less, and because the exit facet of frosting or class frosted makes light loss.
Summary of the invention
The technical problem to be solved in the present invention is, the defects for the flood lens of prior art provides the LED that a kind of light distribution effect is good, light loss is little lens, and the lensed LED light fixture of tool.
One of purpose of the present invention is to provide a kind of LED lens, is used for the luminous intensity distribution of led light source, it is characterized in that described LED lens are revolving body, and described LED lens have a top end face and a bottom face, and the revolution side that connects described top end face and bottom face;
Described bottom face is provided with hemispheric concave spherical surface, and the centre of sphere of described hemispheric concave spherical surface is positioned on the axis of described revolving body;
The middle part of described top end face is provided with conical concave surface, the axis of described conical concave surface and the dead in line of described revolving body;
If the angle of the axis of the bus of described concave surface and described revolving body is θ, the summit of concave surface is L to the distance of bottom face, the refractive index of the material of described LED lens is n, top end face is h to the distance of bottom face, and then θ and L satisfy following relation: θ=90-α (η-1)/(n-1), L≤(1-tan α/tan θ) * h, wherein, 15 ° of α ≈, 1.8≤η≤1.9, η＞n;
Described revolution side is fully reflecting surface, the bus of revolution side is broken line, described broken line comprises five straightways that link to each other successively, take the center of described bottom face as initial point, take the axis of revolving body as Z axis, take the symmetry axis of bottom face as Y-axis, when setting up Descartes's rectangular coordinate system, the starting point coordinate of described bus is (0, d/2,0), wherein d is greater than the diameter of described led light source, every straightway of described bus and the angle of Z axis are 3～45 °, and every straightway of described bus and the angle of Z axis are successively decreased by the sequence of positions of origin-to-destination at bus successively according to this straightway, and the angle of the terminal point of the starting point of every straightway of described bus and the line of initial point and this straightway and the line of initial point is 5～15 °.
In LED lens of the present invention, every straightway of described bus and the angle of Z axis are followed successively by 43.5 °, 33.5 °, 23.5 °, 13.5 °, 3.5 ° according to this straightway in the sequence of positions by origin-to-destination of described bus.
In LED lens of the present invention, the angle of the terminal point of the starting point of every straightway of described bus and the line of initial point and this straightway and the line of initial point is 10 °.
In LED lens of the present invention, described d is than the large 3～5mm of diameter of led light source.
In LED lens of the present invention, be provided with on the described revolution side and increase anti-film.
In LED lens of the present invention, described LED lens are made by optical glass or optical plastic.
In LED lens of the present invention, the refractive index of described optical glass or optical plastic is greater than 1.45.
In LED lens of the present invention, described optical plastic is Merlon or polymethyl methacrylate.
Two of purpose of the present invention is to provide a kind of LED light fixture, at least comprise led light source, and LED lens as previously discussed, the concave spherical surface of described led light source on the described LED lens bottom face, the dead in line of the optical axis of described led light source and described LED lens.
The LED light fixture of implementing LED lens of the present invention and having these lens, have following beneficial effect: the bottom face of LED lens of the present invention is provided with concave spherical surface, top end face is provided with conical concave surface, the less light of the light emitting anger of led light source is after the concave spherical surface refraction, light emitting anger is amplified for the first time, after the conical concave surface refraction through end face, light emitting anger is amplified for the second time, amplify through secondary, spreading all around than the high light alignment of axial ray part, the light that light emitting anger is larger is then drawn close by the backward axis of revolution side total reflection, has solved the larger problem of light intensity of the axial ray part of led light source, can realize more uniform floodlight luminous intensity distribution.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the schematic diagram of the LED lens of prior art;
Fig. 2 is the schematic diagram of the preferred embodiment of LED lens of the present invention;
Fig. 3 is the schematic diagram of end face of the preferred embodiment of LED lens of the present invention;
Fig. 4 is the cutaway view of the preferred embodiment of LED lens of the present invention;
Fig. 5 is the schematic diagram of revolution side of the preferred embodiment of reflective total reflection lens of the present invention;
Fig. 6 is the light path schematic diagram of the luminous intensity distribution of LED lens of the present invention;
Fig. 7 is the light distribution effect schematic diagram of LED lens of the present invention.
The specific embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
To shown in Figure 5, be the schematic diagram of a preferred embodiment of LED lens of the present invention such as Fig. 2, these LED lens are a kind of floodlight total-reflection lens, and these LED lens 10 are used for the luminous intensity distribution of led light source 30.As shown in the figure, these LED lens 10 are the single-revolution body, and it is made by transparent material, for example can be optical plastic or optical glass, the refractive index of transparent material be preferably greater than 1.45, in the present embodiment, these LED lens are made by Merlon, also are the PC material, and its refractive index is 1.59.
These LED lens 10 have a top end face 11 and a bottom face 12, and the revolution side 13 that connects top end face 11 and bottom face 12, and revolution side 13 is fully reflecting surface.In the LED of present embodiment lens, the bus 14 of the revolution side 13 of LED lens 10 is broken line, and this broken line comprises five straightways 21,22,23,24,25 that link to each other successively.The parameter of bus 14 has following mode to determine, take the center of bottom face 12 as initial point 0, the axis that take revolving body is LED lens 10 is Z axis, take the symmetry axis of bottom face 12 as Y-axis, set up Descartes's rectangular coordinate system, the starting point coordinate of bus 14 is (0, d/2,0), wherein d is greater than the diameter of described led light source, every straightway of bus 14 and the angle of Z axis are 3～45 °, and every straightway of bus 14 and the angle of Z axis are successively decreased by the sequence of positions of origin-to-destination at bus 14 successively according to this straightway, and the angle of the terminal point of the starting point of every straightway of described bus 14 and the line of initial point and this straightway and the line of initial point is 5～15 °.
Concrete, in the present embodiment, article five, straightway is followed successively by the first straightway 21, the second straightway 22, the 3rd straightway 23, the 4th straightway 24, the 5th straightway 25, as shown in Figure 5, the starting point of bus 14, also namely the starting point coordinate of the first straightway 21 is (0, d/2,0), in the present embodiment, d=8mm, the diameter of the led light source 30 that cooperates with the LED lens 10 of present embodiment is not more than 5mm, and here, the diameter of led light source 30 refers to the diameter of the light-emitting area 31 of led light source 30, d is advisable with the diameter 3～5mm greater than LDE light source 30, and is unsuitable excessive.
In the present embodiment, the angle of the terminal point of the starting point of every straightway of bus 14 and the line of initial point and this straightway and the line of initial point is 10 °, the first straightway 21 is 43.5 ° with the angle of Z axis, the second straightway 22 is 33.5 ° with the angle of Z axis, the 3rd straightway 23 is 23.5 ° with the Z axis angle, the 4th straightway 24 is 13.5 ° with the Z axis angle, and the 5th straightway 25 is 3.5 ° with the Z axis angle.By the angle of the line of the terminal point of the line of the starting point of the starting point of the first straightway 21, the first straightway 21 and initial point and this straightway and initial point and the first straightway 21 angle with Z axis, these three parameters are decided the coordinate of the terminal point that can determine the first straightway 21, also namely determined the coordinate of the starting point of the second straightway 22, the like namely can determine starting point and the terminal point of every straightway, also namely determine Down Highway 14, bus 14 rotates a circle around Z axis can obtain turning round side 13.Can be determined the shape of LED lens 10 by above-mentioned parameter.In order further to improve the utilization rate of light, can increase anti-film in 13 platings of revolution side, to improve the efficient of reflection.
In the present embodiment, the bottom face 12 of LED lens 10 is provided with hemispheric concave spherical surface 121, and the centre of sphere of this hemispheric concave spherical surface 121 is positioned on the axis that revolving body also is LED lens 10; Be provided with conical concave surface 111 at the middle part of top end face 11, the axis of this conical concave surface 111 and revolving body also are the dead in line of LED lens 10; If the angle of the bus of this conical concave surface 111 and the axis of revolving body is θ, the summit of concave surface 111 is vertex of a cone position to the distance of bottom face 12 is L, the refractive index of the material of LED lens 10 is n, and top end face 11 is h to the distance of bottom face 12, and then θ and L satisfy following relation:
θ＝90-α(η-1)/(n-1)， (1)
L≤(1-tanα/tanθ)×h， (2)
Wherein, 15 ° of α ≈, 1.8≤η≤1.9, η＞n.
Both can determine the parameter of LED lens by above parameter, the parameter of the preferred embodiment of the LED lens of present embodiment is as follows:
The diameter of concave spherical surface 121: 5mm;
The diameter d of the bottom face 12 of LED lens 10: 8mm;
The bus of conical concave surface 111 and the angle theta of axis: 70 °;
The summit of conical concave surface 111 is to the distance L of end face 12: 7.5mm;
The diameter of top end face 11: 14mm;
Can be found out that by above parameter the institute of these LED lens 10 takes up space and is 14mm * 14mm * 8.5mm to the maximum, volume is very little.
Fig. 6 shows the light path schematic diagram of the luminous intensity distribution of LED lens 10 of the present invention, for the first time refraction when entering lens by concave spherical surface 121, the light of the part of the axis of close led light source 30 occurs, then penetrated after for the second time refraction by conical concave surface 111, after twice refraction, the angle of light and axis is exaggerated; For the first time refraction occurs when entering lens with the light of the slightly large part of the axis angle of led light source 30 by concave spherical surface 121, then the planar section by top end face 11 penetrates after for the second time refraction, after twice refraction, the angle of this part light and axis also is exaggerated; For the first time refraction when entering lens by concave spherical surface 121, the light that further departs from the axis portion of led light source 30 occurs, then directive turns round side 13, directive top end face 11 ejaculation after for the second time refraction after the total reflection occurs in revolution side 13, this part light is after for the first time refraction of experience, total reflection, for the second time refraction, and light is changed into to penetrating to offside by penetrating to axis one side direction; Above-mentioned three part light are the intersection mode and penetrate behind the LED lens, because stronger light and angle axis of the close axis portion of led light source 30 is exaggerated, spreading all around than the high light alignment of axial ray part, and intersect with other regional light and to mix, so just can obtain good Architecture Floodlighting, and, because the light that led light source 30 regionals send can be fully utilized, improved the utilization ratio of light.The light distribution effect of LED lens 10 of the present invention as shown in Figure 7, as seen from the figure, in light emitting anger was 60 ° scope, uniformity of illuminance was very high.
The present invention is except providing above-mentioned LED lens, a kind of LED light fixture also is provided, and this LED light fixture comprises led light source 30 at least, and LED lens 10, the concave spherical surface 121 of led light source 30 on the bottom face 12 of LED lens 10, the dead in line of the optical axis of led light source 20 and LED lens 10.Led light source 30 preferred light emitting angers are the led light source between 110 °-130 °, and the luminescence chip of led light source 30 flushes with the bottom face 12 of LED lens 10, and the light-emitting area 31 of the sphere of led light source 30 extend in the concave spherical surface 121.
The bottom face of LED lens of the present invention is provided with concave spherical surface, top end face is provided with conical concave surface, the less light of the light emitting anger of led light source is after the concave spherical surface refraction, light emitting anger is amplified for the first time, after the conical concave surface refraction through end face, light emitting anger is amplified for the second time, amplify through secondary, spreading all around than the high light alignment of axial ray part, the light that light emitting anger is larger is then drawn close by the backward axis of revolution side total reflection, solve the larger problem of light intensity of the axial ray part of led light source, can realize more uniform floodlight luminous intensity distribution.
The above is described embodiments of the invention by reference to the accompanying drawings; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (9)
1. LED lens, the luminous intensity distribution that is used for led light source, it is characterized in that, described LED lens (10) are revolving body, described LED lens (10) have a top end face (11) and a bottom face (12), and the revolution side (13) that connects described top end face (11) and bottom face (12);
Described bottom face (12) is provided with hemispheric concave spherical surface (121), and the centre of sphere of described hemispheric concave spherical surface (121) is positioned on the axis of described revolving body;
The middle part of described top end face (11) is provided with conical concave surface (111), the axis of described conical concave surface (111) and the dead in line of described revolving body;
If the angle of the bus of described concave surface (111) and the axis of described revolving body is θ, the summit of concave surface (111) is L to the distance of bottom face (12), the refractive index of the material of described LED lens (10) is n, top end face (11) is h to the distance of bottom face (12), and then θ and L satisfy following relation: θ=90-α (η-1)/(n-1), L≤(1-tan α/tan θ) * h, wherein, 15 ° of α ≈, 1.8≤η≤1.7, η＞n;
Described revolution side (13) is fully reflecting surface, the bus (14) of revolution side (13) is broken line, described broken line comprises five straightways (21 that link to each other successively, 22,23,24,25), take the center of described bottom face (12) as initial point, take the axis of revolving body as Z axis, take the symmetry axis of bottom face (12) as Y-axis, when setting up Descartes's rectangular coordinate system, the starting point coordinate of described bus (14) is (0, d/2,0), wherein d is greater than the diameter of described led light source, every straightway of described bus (14) and the angle of Z axis are 3～45 °, every straightway of described bus (14) and the angle of Z axis are successively decreased by the sequence of positions of origin-to-destination at bus (14) successively according to this straightway, and the angle of the terminal point of the starting point of every straightway of described bus (14) and the line of initial point and this straightway and the line of initial point is 5～15 °.
2. LED lens according to claim 1, it is characterized in that every straightway of described bus (14) and the angle of Z axis are followed successively by 43.5 °, 33.5 °, 23.5 °, 13.5 °, 3.5 ° according to this straightway in the sequence of positions by origin-to-destination of described bus (14).
3. LED lens according to claim 1 is characterized in that, the angle of the terminal point of the starting point of every straightway of described bus (14) and the line of initial point and this straightway and the line of initial point is 10 °.
4. LED lens according to claim 1 is characterized in that, described d is than the large 3～5mm of diameter of led light source.
5. LED lens according to claim 1 is characterized in that, are provided with on the described revolution side (13) to increase anti-film.
6. LED lens according to claim 1 is characterized in that, described LED lens (10) are made by optical glass or optical plastic.
7. LED lens according to claim 6 is characterized in that, the refractive index of described optical glass or optical plastic is greater than 1.45.
8. LED lens according to claim 6 is characterized in that, described optical plastic is Merlon or polymethyl methacrylate.
9. LED light fixture, it is characterized in that, comprise at least led light source, and such as each described LED lens of claim 1 to 8, the concave spherical surface (121) of described led light source on the described LED lens bottom face (12), the dead in line of the optical axis of described led light source and described LED lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110213728.9A CN102901041B (en) | 2011-07-28 | 2011-07-28 | LED (Light-Emitting Diode) lens and LED lamp provided with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110213728.9A CN102901041B (en) | 2011-07-28 | 2011-07-28 | LED (Light-Emitting Diode) lens and LED lamp provided with same |
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| Publication Number | Publication Date |
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| CN102901041A true CN102901041A (en) | 2013-01-30 |
| CN102901041B CN102901041B (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110213728.9A Active CN102901041B (en) | 2011-07-28 | 2011-07-28 | LED (Light-Emitting Diode) lens and LED lamp provided with same |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005303046A (en) * | 2004-04-13 | 2005-10-27 | Okaya Electric Ind Co Ltd | Indicating lamp |
| US20060152820A1 (en) * | 2005-01-10 | 2006-07-13 | Shi-Hwa Huang | Lens and light-emitting device including the lens |
| CN101487570A (en) * | 2005-03-07 | 2009-07-22 | 三洋电机株式会社 | Lighting device |
| CN101900294A (en) * | 2010-07-30 | 2010-12-01 | 海洋王照明科技股份有限公司 | Condensing lens and lamp using same |
-
2011
- 2011-07-28 CN CN201110213728.9A patent/CN102901041B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005303046A (en) * | 2004-04-13 | 2005-10-27 | Okaya Electric Ind Co Ltd | Indicating lamp |
| US20060152820A1 (en) * | 2005-01-10 | 2006-07-13 | Shi-Hwa Huang | Lens and light-emitting device including the lens |
| CN101487570A (en) * | 2005-03-07 | 2009-07-22 | 三洋电机株式会社 | Lighting device |
| CN101900294A (en) * | 2010-07-30 | 2010-12-01 | 海洋王照明科技股份有限公司 | Condensing lens and lamp using same |
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| Publication number | Publication date |
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| CN102901041B (en) | 2015-01-14 |
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