CN102654268A - LED (Light-Emitting Diode) lens device, LED lens device module and LED lamp device - Google Patents
LED (Light-Emitting Diode) lens device, LED lens device module and LED lamp device Download PDFInfo
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- CN102654268A CN102654268A CN2011100502273A CN201110050227A CN102654268A CN 102654268 A CN102654268 A CN 102654268A CN 2011100502273 A CN2011100502273 A CN 2011100502273A CN 201110050227 A CN201110050227 A CN 201110050227A CN 102654268 A CN102654268 A CN 102654268A
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Abstract
The invention relates to an LED (Light-Emitting Diode) lens device, an LED lens device module and an LED lamp device. The LED lens device is used for covering the exterior of an LED and controlling the light direction of the LED and comprises a parabolic light-condensing bowl, a collimating lens and a facetted-eye lens system, wherein the collimating lens is arranged in the parabolic light-condensing bowl, and the facetted-eye lens system is arranged at the opening end of the parabolic light-condensing bowl; the focal point of the parabolic light-condensing bowl is coincided with that of the collimating lens; the LED is arranged at the focal point of the parabolic light-condensing bowl; one side of the collimating lens facing the LED is of a free curved surface; the facetted-eye lens system comprises a plurality of facetted-eye lenses which are in arrayed arrangement; the shapes of the facetted-eye lenses are of free curved surfaces; and the projection of the facetted-eye lenses along the axial direction of the parabolic light-condensing bowl is rectangular.
Description
Technical field
The present invention relates to lighting field, be specially a kind of LED lens devices, LED lens devices module and LED light fixture.
Background technology
LED compares with traditional lighting source; Have advantages such as environmental protection, energy-conservation, long service life and antidetonation; Along with the stability raising of LED development of technology and led light source light efficiency and the decline of LED price, the LED illumination is expanded to the city illumination application from outdoor Landscape Lighting, road lighting field gradually.But because the LED light fixture is compared with sodium vapor lamp with traditional fluorescent lamp, its volume is less, so light-emitting area is also little, causes its lighting area little, in addition, and the single further lighting area that limited of the light emission direction property of LED.In addition, the hot spot that existing LED light fixture forms is circular light spot 6, and is as depicted in figs. 1 and 2; Its Illumination Distribution belongs to lambert's body circular distribution, and is very strong in the position illumination near the center of circle, from center of circle illumination far away more a little less than; Cause near the light of home position too strong; Produce dazzle, too dark away from the position light in the center of circle, be unfavorable for the protection of the long-term people's who under this lighting environment, lives eyesight.Country to the index property requirement of room lighting be uniformity of illuminance greater than 0.8, single lamp uniformity of illuminance of existing LED light fixture generally is lower than 0.8.In addition, for the target illumination face of rectangle, like corridor 5, existing LED light fixture forms circular hot spot, and making has 50% light to be scattered in 5 outsides, corridor approximately, and is as shown in Figure 2, caused waste.Adopt when having the lamp lighting of a plurality of LED in addition, the hot spot that each LED forms on the target illumination face can not be accomplished seamless spliced, and is as shown in Figure 3, so uniformity of illuminance is low.
Summary of the invention
The technical problem that the present invention solves is to overcome the shortcoming that existing LED lamp lighting area is little, uniformity of illuminance is low, provides a kind of LED of making to increase the lens devices of lighting area, raising uniformity of illuminance.
LED lens devices of the present invention; Be used to cover on the radiation direction of the said LED of LED external control; Comprise the parabola convergent bowl, be located at the collimation lens in the said parabola convergent bowl and be located at the fly's-eye lens system of the openend of said parabola convergent bowl; The focus of said parabola convergent bowl overlaps with the focus of said collimation lens; Said LED is located at the along of said parabola convergent bowl, and said collimation lens is a free form surface towards the side of said LED, and the light that said LED sends keeps to the side, and part forms after the total reflection of said parabola convergent bowl inwall and the incident ray of the parallel axes of said parabola convergent bowl; The light that said LED sends forms through said collimation lens refraction back near mid portion and the incident ray of the parallel axes of said parabola convergent bowl; Said fly's-eye lens system comprises a plurality of fly's-eye lenses arranged into an array, said fly's-eye lens be shaped as free form surface, said fly's-eye lens is along the rectangle that is projected as of the axis direction of said parabola convergent bowl; Said incident ray forms emergent ray after the fly's-eye lens refraction, said emergent ray forms rectangular light spot on the target illumination face.
As preferably, said parabola convergent bowl, collimation lens and fly's-eye lens system are formed in one.
Preferred as further, said parabola convergent bowl, collimation lens and fly's-eye lens system adopt PMMA (polymethyl methacrylate) injection molded.
As preferably, the bus equation of said parabola convergent bowl is y
2=4fx, wherein f is the focal length of said parabola convergent bowl.
Preferred as further, the shape of the free form surface of said collimation lens and fly's-eye lens meets equation
Wherein,
Wherein
/ 2-LED beam angle, α
3Be the angle of emergent ray and target illumination face, χ
RHalf the for rectangular light spot length.
The present invention also provides a kind of LED lens devices module, comprises installing plate and is arranged on a plurality of aforesaid LED lens devices on the said installing plate.
As preferably, said installing plate and said lens devices are one-body molded.
The present invention also provides a kind of LED light fixture, comprises aluminium base, is located at LED and aforesaid lens devices on the said aluminium base.
The present invention also provides another kind of LED light fixture; Comprise aluminium base, be located at a plurality of LED on the said aluminium base; Also comprise aforesaid LED lens devices module, each said LED is arranged at the along of parabola convergent bowl of each LED lens devices of said LED lens devices module respectively.
LED lens devices of the present invention, LED lens devices module and LED light fixture compared with prior art have following beneficial effect:
1, LED lens devices of the present invention comprises the parabola convergent bowl, is located at the collimation lens in the said parabola convergent bowl and is located at the fly's-eye lens system of the openend of said parabola convergent bowl; The light that LED is sent through parabola convergent bowl and collimation lens changes the light of the axis that is parallel to the parabola convergent bowl into, and the light that reflects through the fly's-eye lens that is projected as rectangle forms the big and even brightness rectangular light spot of area on the target illumination face.Thereby increase the lighting area and the uniformity of illuminance of LED light fixture, and can alleviate the glare problem of LED light fixture greatly.
2, parabola convergent bowl, collimation lens and fly's-eye lens system are formed in one, and make that the simple therefore cost of LED lens devices manufacturing is low and have higher precision.
3, the hot spot that on the target illumination face, forms of LED lens devices module light that a plurality of LED are sent can be realized seamless splicedly, has improved the uniformity of illuminance and the illumination efficiency of illumination.
Description of drawings
Fig. 1 is the illumination measured result figure of existing LED light fixture;
Fig. 2 is the illuminating effect sketch map of existing LED light fixture to the corridor;
Fig. 3 is the illuminating effect sketch mapes of a plurality of existing LED light fixtures to the corridor;
Fig. 4 is the perspective view of LED lens devices of the present invention;
Fig. 5 is the schematic top plan view of LED lens devices of the present invention;
Fig. 6 is the light path sketch map that the fly's-eye lens of LED lens devices of the present invention reflects incident ray;
Fig. 7 is the schematic top plan view of LED lens devices module of the present invention;
Fig. 8 is the Illumination Distribution figure of LED light fixture of the present invention;
Fig. 9 is the surface of intensity distribution with LED light fixture of the present invention;
Figure 10 is the illuminating effect sketch map of a kind of LED light fixture of the present invention to the corridor;
Figure 11 is the illuminating effect sketch map of another kind of LED light fixture of the present invention to the corridor.
The specific embodiment
Fig. 4 is the perspective view of LED lens devices of the present invention, and Fig. 5 is the schematic top plan view of LED lens devices of the present invention.Like Fig. 4 and shown in Figure 5; LED lens devices of the present invention; Be used to cover on the radiation direction of the said LED of LED external control; Comprise parabola convergent bowl 1, be located at the collimation lens 2 in the said parabola convergent bowl 1 and be located at the fly's-eye lens system 3 of the openend of said parabola convergent bowl 1, the focus of said parabola convergent bowl 1 overlaps with the focus of said collimation lens, and said LED is located at the along of said parabola convergent bowl 1; Said collimation lens 2 is a free form surface towards the side of said LED; Said fly's-eye lens system 3 comprises a plurality of fly's-eye lenses arranged into an array 4, said fly's-eye lens 4 be shaped as free form surface, said fly's-eye lens 4 is along the rectangle that is projected as of the axis direction of said parabola convergent bowl 1.Said LED places the along of said parabola convergent bowl 1; The submarginal part of the light that LED sends is radiated on the inner surface of parabola convergent bowl 1; Form the incident ray 16 of the axis that is parallel to parabola convergent bowl 1 after the generation total reflection, Fig. 6 is the light path sketch map that the fly's-eye lens of LED lens devices of the present invention reflects incident ray 16, and is as shown in Figure 6; Said incident ray 16 is radiated at the some t (x of rectangle free form surface of fly's-eye lens 4 of the marginal portion of fly's-eye lens system 3; Z) locate, emergent ray 17 and target illumination face 14 meet at 1 p (XR, H).N is the normal vector of incident ray 16 and fly's-eye lens.Theoretical according to rim ray; All the time be positioned at the outermost on illumination target plane from the light of collimation lens edge outgoing, guarantee can not interlock after light is through collimation lens, incide on the target illumination face 14 according to from outside to inside order all the time; The light that reflects from each fly's-eye lens 4 has changed original direction; Form emergent ray 17, because the orthographic projection of fly's-eye lens 4 is a rectangle, said emergent ray 17 forms the big rectangular light spot 7 of area on target illumination face 14.The part near the centre of the light that LED sends reflects when passing through collimation lens 2; The incident ray 16 of the parallel axes of formation of refraction back and parabola convergent bowl 1; 4 refractions form emergent ray 17 to said incident ray 16 through fly's-eye lens; Said emergent ray 17 impinges upon target and looks for bright to go up formation rectangular light spot 7, and principle is the same.Rectangular light spot 7 superpositions that a plurality of fly's-eye lenses 4 form; Form a uniformity of illuminance and reach 0.85 rectangular large area hot spot 7; Be respectively the Illumination Distribution figure and the surface of intensity distribution of the LED light fixture that is installed in having of 1.8 meters eminences LED lens devices of the present invention like Fig. 8 and Fig. 9; Wherein, on behalf of 0-90 degree luminous intensity distribution, the line 11 among Fig. 9 distribute, and on behalf of 90-180 degree luminous intensity distribution, line 12 distribute.Therefore, LED lens devices of the present invention can increase lighting area and the uniformity of illuminance of LED, and can alleviate the glare problem of existing LED light fixture greatly.
In the above-described embodiments, said parabola convergent bowl 1, collimation lens 2 and fly's-eye lens system 3 are formed in one.The manufacturing of integrated LED lens devices is simple so cost is low and have higher precision.
In the above-described embodiments, said parabola convergent bowl 1, collimation lens 2 and fly's-eye lens system 3 adopt PMMA (polymethyl methacrylate) injection molded.
In the above-described embodiments, the bus equation of said parabola convergent bowl 1 is y
2=4fx, wherein f is the focal length of said parabola convergent bowl 1.
In the above-described embodiments, the shape of the free form surface of said collimation lens and fly's-eye lens meets equation
Wherein,
Wherein
/ 2-LED beam angle, α
3Be the angle of emergent ray and target illumination face, χ
RHalf the for rectangular light spot length.
The present invention also provides a kind of LED lens devices module, and Fig. 7 is the schematic top plan view of LED lens devices module of the present invention, and is as shown in Figure 7, and LED lens devices module comprises installing plate 8 and is arranged on a plurality of aforesaid LED lens devices on the said installing plate 8.In the present embodiment, said installing plate 8 is one-body molded with said lens devices, also adopts PMMA injection molded.The hot spot that the light that LED lens devices module provided by the invention can make a plurality of LED send forms on target illumination face 14 can be realized seamless spliced, has improved the uniformity of illuminance and the illumination efficiency of illumination.
The present invention also provides a kind of LED light fixture (not shown), and the LED that comprise aluminium base, is located on the said aluminium base reaches as above-mentioned lens devices, and said LED is positioned at the along of the parabola convergent bowl 1 of said lens devices.Figure 10 is the illuminating effect sketch map with LED light fixture of LED lens devices to corridor 5 of the present invention; Shown in figure 10; LED light fixture with LED lens devices produces the hot spot of rectangle, and the parameter of adjustment LED lens devices is complementary the building parameter in itself and corridor 5; Thereby can produce the width rectangular light spot 7 identical with corridor 5 width; The basic full illumination of light of LED light fixture that promptly has a LED lens devices in corridor 5 and illumination even, compare with the existing LED light fixture that reaches equal illumination, the LED light fixture with LED lens devices has improved illumination efficiency greatly.
The present invention also provides other a kind of LED light fixture (not shown); Comprise aluminium base, be located at a plurality of LED on the said aluminium base; Also comprise aforesaid LED lens devices module, each said LED is arranged at the along of parabola convergent bowl 1 of each LED lens devices of said LED lens devices module respectively.LED light fixture with LED lens devices module, the hot spot of generation can be realized slitless connection on target illumination face 14, shown in figure 11, has further improved the uniformity of illuminance and the illumination efficiency of illumination.
Above embodiment is merely exemplary embodiment of the present invention, is not used in restriction the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the present invention in essence of the present invention and protection domain, this modification or be equal to replacement and also should be regarded as dropping in protection scope of the present invention.
Claims (9)
1. LED lens devices; Be used to cover on the radiation direction of the said LED of LED external control; It is characterized in that: comprise the parabola convergent bowl, be located at the collimation lens in the said parabola convergent bowl and be located at the fly's-eye lens system of the openend of said parabola convergent bowl; The focus of said parabola convergent bowl overlaps with the focus of said collimation lens; Said LED is located at the along of said parabola convergent bowl, and said collimation lens is a free form surface towards the side of said LED, and the light that said LED sends keeps to the side, and part forms after the total reflection of said parabola convergent bowl inwall and the incident ray of the parallel axes of said parabola convergent bowl; The light that said LED sends forms through said collimation lens refraction back near mid portion and the incident ray of the parallel axes of said parabola convergent bowl; Said fly's-eye lens system comprises a plurality of fly's-eye lenses arranged into an array, said fly's-eye lens be shaped as free form surface, said fly's-eye lens is along the rectangle that is projected as of the axis direction of said parabola convergent bowl; Said incident ray forms emergent ray after the fly's-eye lens refraction, said emergent ray forms rectangular light spot on the target illumination face.
2. LED lens devices according to claim 1 is characterized in that: said parabola convergent bowl, collimation lens and fly's-eye lens system are formed in one.
3. LED lens devices according to claim 2 is characterized in that: said parabola convergent bowl, collimation lens and fly's-eye lens system adopt PMMA injection molded.
4. LED lens devices according to claim 1 is characterized in that: the bus equation of said parabola convergent bowl is y
2=4fx, wherein f is the focal length of said parabola convergent bowl.
5. LED lens devices according to claim 4 is characterized in that: the shape of the free form surface of said collimation lens and fly's-eye lens meets equation
Wherein,
Wherein
Beam angle, α
3Be the angle of emergent ray and target illumination face, χ
RHalf the for rectangular light spot length.
6. LED lens devices module is characterized in that: comprise installing plate and be arranged on a plurality of like each described LED lens devices among the claim 1-5 on the said installing plate.
7. LED lens devices module according to claim 6 is characterized in that: said installing plate and said lens devices are one-body molded.
8. LED light fixture is characterized in that: comprise aluminium base, be located on the said aluminium base LED and like each described lens devices among the claim 1-5.
9. LED light fixture; It is characterized in that: comprise aluminium base, be located at a plurality of LED on the said aluminium base; Also comprise LED lens devices module as claimed in claim 8, each said LED is arranged at the along of parabola convergent bowl of each LED lens devices of said LED lens devices module respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100502273A CN102654268A (en) | 2011-03-02 | 2011-03-02 | LED (Light-Emitting Diode) lens device, LED lens device module and LED lamp device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100502273A CN102654268A (en) | 2011-03-02 | 2011-03-02 | LED (Light-Emitting Diode) lens device, LED lens device module and LED lamp device |
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| CN102654268A true CN102654268A (en) | 2012-09-05 |
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| CN2011100502273A Pending CN102654268A (en) | 2011-03-02 | 2011-03-02 | LED (Light-Emitting Diode) lens device, LED lens device module and LED lamp device |
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| CN103656868A (en) * | 2013-12-12 | 2014-03-26 | 中国科学院苏州生物医学工程技术研究所 | Neonatal jaundice therapeutic equipment optical device based on LED light source |
| CN103872228A (en) * | 2012-12-11 | 2014-06-18 | 鸿富锦精密工业（深圳）有限公司 | Light-emitting-diode combination |
| CN104019426A (en) * | 2013-09-05 | 2014-09-03 | 四川通盈能源开发有限公司 | Integrated light distribution lens for LED street lamp |
| CN104061453A (en) * | 2013-03-21 | 2014-09-24 | 海洋王（东莞）照明科技有限公司 | LED (light emitting diode) lamp and light source structure thereof |
| CN104075250A (en) * | 2013-03-29 | 2014-10-01 | 海洋王（东莞）照明科技有限公司 | Light distribution structure and LED lamp thereof |
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| CN104061453B (en) * | 2013-03-21 | 2016-02-10 | 海洋王（东莞）照明科技有限公司 | LED lamp and light-source structure thereof |
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| WO2015014062A1 (en) * | 2013-07-31 | 2015-02-05 | 华南理工大学 | Free-form surface micro lens array for led headlamp of automobile |
| CN104019426A (en) * | 2013-09-05 | 2014-09-03 | 四川通盈能源开发有限公司 | Integrated light distribution lens for LED street lamp |
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| CN103656868A (en) * | 2013-12-12 | 2014-03-26 | 中国科学院苏州生物医学工程技术研究所 | Neonatal jaundice therapeutic equipment optical device based on LED light source |
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| CN106931402A (en) * | 2016-12-14 | 2017-07-07 | 江西科技师范大学 | A kind of LED traffic signal lamp lens mask |
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| CN109958928A (en) * | 2019-03-18 | 2019-07-02 | 山东方星光电科技有限公司 | Anti-dazzle mesh LED blackboard lamp |
| CN109958928B (en) * | 2019-03-18 | 2022-05-13 | 山东方星光电科技有限公司 | Anti-dazzle mesh LED blackboard lamp |
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Application publication date: 20120905 |