CN103851363A - LED lamp and lens thereof - Google Patents
LED lamp and lens thereof Download PDFInfo
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- CN103851363A CN103851363A CN201210502097.7A CN201210502097A CN103851363A CN 103851363 A CN103851363 A CN 103851363A CN 201210502097 A CN201210502097 A CN 201210502097A CN 103851363 A CN103851363 A CN 103851363A
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Abstract
The invention discloses an LED lamp and a lens thereof. The LED lamp comprises an LED light source and the lens. The lens comprises a reflecting surface, a light inlet surface and a light outlet surface, wherein the light inlet surface and the light outlet surface are arranged at two ends of the reflecting surface. The reflecting surface is formed by enabling two symmetric arcs to rotate through 180 degrees around the symmetry axis of the two symmetric arcs, the distances between symmetry points of the two arcs are gradually increased in the direction towards the light outlet surface, the light inlet surface comprises a cone-shaped concave surface and a free convex surface, wherein the cone-shaped concave surface extends in the direction towards the light outlet surface from one end of the reflecting surface, and the free convex surface extends in the direction far away from the light outlet surface from the top of the cone-shaped concave surface. The cone-shaped concave surface and the free convex surface form an accommodating groove for arranging the light source, and the light outlet surface is provided with a plurality of parallel cylindrical surface protrusions. Cylindrical surfaces can be utilized to achieve refraction of light, the light beam angle of the whole lamp on the cylindrical surfaces in the radial direction is increased, the light beam angle of the whole lamp on the cylindrical surfaces in the length direction is not changed, oval light distribution is achieved, and oval light spots are formed on the illuminated surfaces. Light spot transition can be smoother through the cylindrical surface protrusions.
Description
Technical field
The present invention relates to LED lamp luminous intensity distribution field, relate in particular to a kind of LED light fixture and lens thereof.
Background technology
Along with traditional incandescent lamp bulb arena of history that slowly fades out, take LED as representative the 4th generation solid state light emitter set up gradually the nucleus of leadership status at lighting field.LED(Light Emitting Diode) high with its efficiency, photochromic pure, energy consumption is low, the life-span is long, the advantage such as pollution-free becomes competitive new type light source of 21 century.Along with improving constantly of LED luminous flux and light efficiency, LED is also more and more extensive in the application of lighting field.But the surperficial bright dipping of LED chip is that Lambertian distributes, and cannot directly apply to illuminator.Therefore, the design of the secondary light-distribution take LED as light source seems particularly important.
At present, on market to the secondary light-distribution design of LED light source mainly to form the reflector of circular light spot and lens as main on face to be illuminated, this type of light-distribution lens can meet the light distribution requirements of common symmetric form solid space; But in the face of horizontal and vertical strict asymmetrical solid space (such as narrow tunnel), this kind of luminous intensity distribution form will certainly cause the significant wastage of luminous energy, thereby causes the waste of electric energy.
Summary of the invention
The object of the present invention is to provide a kind of LED light fixture and lens thereof that form oval hot spot on face to be illuminated.
In order to solve the problems of the technologies described above, the invention provides a kind of lens, described lens comprise a reflecting surface and are located at incidence surface and the exiting surface at described reflecting surface two ends, described reflecting surface is formed around its symmetry axis Rotate 180 degree by two camber lines of symmetry, and the distance between described two camber line symmetric points is along increasing gradually towards the direction of exiting surface, described incidence surface comprises the circular cone concave surface being extended towards described exiting surface direction by one end of described reflecting surface and the free convex surface being extended away from described exiting surface direction by the edge, top of described circular cone concave surface, described circular cone concave surface and free convex surface form one for the storage tank of light source is set, described exiting surface is provided with multiple face of cylinder projections that be arranged in parallel.
Wherein, the number of described face of cylinder projection is 12 ~ 16.
Wherein, distance between described two camber line symmetric points is along increasing gradually 2 ~ 3 times towards the direction of exiting surface, and described lens are described two camber lines 1 ~ 1.5 times of the end points spacing of light inlet along optical axis direction total length.
Wherein, described two camber line symmetric points are 14.447mm in the distance between bright dipping place end points, distance between light inlet end points is 6mm, and described lens are 8mm along the total length of optical axis direction.
Wherein, the angle between the bus of described circular cone concave surface and the optical axis of described lens is 6.34 °.
Wherein, described LED light source is positioned on the optical axis of described lens and towards described free convex surface, the line between the circumferential edge of described free convex surface and LED light source luminous point and the angle of described lens axis are 35 ° ~ 45 °.
Wherein, the cross section of described face of cylinder projection is semicircle, the adjacent tangent connection of face of cylinder projection.
Wherein, the diameter of described face of cylinder projection is 1mm.
Wherein, described reflecting surface is fully reflecting surface.
Meanwhile, the present invention also provides a kind of LED light fixture, comprises LED light source and aforesaid lens, and described LED light source is fixed in the storage tank of described lens.
LED light fixture provided by the invention and lens thereof, utilize the face of cylinder projection can be by light refraction, increase light fixture entirety at projection footpath, face of cylinder beam angle upwards, and do not change the beam angle of light fixture entirety in face of cylinder projection length direction, thereby realize oval luminous intensity distribution, on face to be illuminated, form oval hot spot; Face of cylinder projection can make hot spot transition more level and smooth.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of the lens that provide of the preferred embodiment for the present invention;
Fig. 2 is the side orthographic drawing of the lens of Fig. 1;
Fig. 3 is the axial section of the LED light fixture that provides of the preferred embodiment for the present invention;
Fig. 4 is that the LED light fixture of Fig. 3 is at the illumination figure at 1 meter of;
Fig. 5 is the distribution curve flux figure of the LED light fixture of Fig. 3.
The specific embodiment
Below in conjunction with the accompanying drawing in embodiment of the present invention, the technical scheme in embodiment of the present invention is clearly and completely described.
See also Fig. 1 to Fig. 3, a kind of LED light fixture that embodiment of the present invention provides, comprises that LED light source 2(is as shown in Figure 3) and lens 1.Lens 1 comprise a reflecting surface 11 and are located at incidence surface 12 and the exiting surface 13 at reflecting surface 11 two ends, reflecting surface 11 is by two camber line 11a of symmetry, 11b forms around its symmetry axis Rotate 180 degree, and two camber line 11a, distance between 11b symmetric points is along increasing gradually towards the direction of exiting surface, incidence surface 12 comprises the circular cone concave surface 121 being extended towards exiting surface direction by one end of reflecting surface 11 and the free convex surface 122 being extended away from exiting surface direction by the edge, top of circular cone concave surface 121, circular cone concave surface 121 and free convex surface 122 form one for the storage tank 10 of light source is set, LED light source 2 is fixed in storage tank 10.
In the present embodiment, lens 1 also comprise the bottom face 15 being connected between reflecting surface 11 and incidence surface.Certainly, between reflecting surface 11 and incidence surface 12, also can directly be connected herein, and bottom face 15 is not set.
As preferably, reflecting surface 11 is fully reflecting surface, and lens 1 are TIR(TotalInternalReflection, total internal reflection) lens.
As preferably, the distance between two camber line 11a, 11b symmetric points is along increasing gradually 2 ~ 3 times towards the direction of exiting surface, and lens 1 are two camber line 11a, 11b 1 ~ 1.5 times of the end points spacing d1 of light inlet along optical axis direction total length h.To reach best light distribution effect.In the present embodiment, two camber line 11a, 11b symmetric points are 14.447mm at the distance d2 between bright dipping place end points, distance d1 between light inlet end points is 6mm, and lens 1 are 8mm along the total length h of optical axis direction.Whole lens 1 volume is little, and integrated level is higher, facilitates the whole lamp design of follow-up LED.
Exiting surface 13 is provided with multiple face of cylinder projections 14 that be arranged in parallel, utilize face of cylinder projection 14 light refraction can be made to its deflection face of cylinder projection 14 both sides radially, increase lens 1 entirety at face of cylinder projection 14 footpaths beam angle upwards, thereby realize oval luminous intensity distribution, on face to be illuminated, form oval hot spot, be applicable to horizontal and vertical asymmetrical solid space as the luminous intensity distribution in narrow tunnel, avoid luminous energy waste.As preferably, the cross section of face of cylinder projection 14 is semicircle, the adjacent tangent connection of face of cylinder projection 14, can make light guide all through the face of cylinder, better to reflect light guide, make footpath, face of cylinder luminous intensity distribution upwards even, face of cylinder projection 14 can make hot spot transition more level and smooth simultaneously.
As preferably, in order to realize best oval light distribution effect, the number of face of cylinder projection 14 is 12 ~ 16.In the present embodiment, the diameter of face of cylinder projection 14 is 1mm, and its number is about 14.
In the present embodiment, angle β between the optical axis of the bus of circular cone concave surface 121 and lens 1 is 6.34 °, be that angle between the bus of circular cone concave surface 121 and the cross section of lens 1 is 83.66 °, easy to process, be convenient to the surrounding side light of LED light source to refract to the reflecting surface 11 of lens 1 simultaneously, and be and be parallel to the axial collimated light beam of lens 1 by reflecting surface 11 total reflections, be beneficial to by illumination control within the specific limits.
LED light source 2 is positioned on the optical axis of lens 1 and towards free convex surface 122, the angle α of the line between the circumferential edge of free convex surface 122 and LED light source 2 and lens 1 optical axis is 35 ° ~ 45 °.The light that is about 0 ~ 40 ° ± 5 ° of LED light source 2 dead aheads can be irradiated on free convex surface 122, can play optically focused effect by free convex surface 122, makes light more concentrated.The side light of LED light source 2 the light of 40 ° ± 5 ° ~ 90 ° through circular cone concave surface 121 and reflecting surface 11 total reflections the exiting surface 13 to lens 1.
Particularly, in the present embodiment, line between the circumferential edge of free convex surface 122 and LED light source 2 luminous points and the angle α of lens 1 optical axis are 40 °, the corresponding dead ahead light of controlling 0 ~ 40 ° of LED light source of free convex surface 122, the corresponding side light of controlling 40 ° ~ 90 ° of LED light sources of circular cone concave surface 121.Certainly, herein angle because LED light source 2 is arranged on the different and deviation to some extent of the degree of depth in storage tank 10.
As shown in Figure 4, its hot spot forming on face to be illuminated is oval hot spot to the illumination figure at 1 meter of of the LED light fixture that present embodiment provides as seen; As shown in 5 figure, the distribution curve flux figure of LED light fixture, from visible this LED light fixture of curve, on the face of cylinder, rising angle is in the radial direction 40 °, visible in conjunction with Fig. 4, its rising angle at face of cylinder length direction is 14.5 °.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. lens, it is characterized in that, described lens comprise a reflecting surface and are located at incidence surface and the exiting surface at described reflecting surface two ends, described reflecting surface is formed around its symmetry axis Rotate 180 degree by two camber lines of symmetry, and the distance between described two camber line symmetric points is along increasing gradually towards the direction of exiting surface, described incidence surface comprises the circular cone concave surface being extended towards described exiting surface direction by one end of described reflecting surface and the free convex surface being extended away from described exiting surface direction by the edge, top of described circular cone concave surface, described circular cone concave surface and free convex surface form one for the storage tank of light source is set, described exiting surface is provided with multiple face of cylinder projections that be arranged in parallel.
2. lens according to claim 1, is characterized in that, the number of described face of cylinder projection is 12 ~ 16.
3. lens according to claim 1, it is characterized in that, distance between described two camber line symmetric points is along increasing gradually 2 ~ 3 times towards the direction of exiting surface, and described lens are described two camber lines 1 ~ 1.5 times of the end points spacing of light inlet along optical axis direction total length.
4. lens according to claim 1, is characterized in that, described two camber line symmetric points are 14.447mm in the distance between bright dipping place end points, distance between light inlet end points is 6mm, and described lens are 8mm along the total length of optical axis direction.
5. lens according to claim 1, is characterized in that, the angle between the bus of described circular cone concave surface and the optical axis of described lens is 6.34 °.
6. lens according to claim 1, it is characterized in that, described LED light source is positioned on the optical axis of described lens and towards described free convex surface, the line between the circumferential edge of described free convex surface and LED light source luminous point and the angle of described lens axis are 35 ° ~ 45 °.
7. lens according to claim 1, is characterized in that, the cross section of described face of cylinder projection is semicircle, the adjacent tangent connection of face of cylinder projection.
8. lens according to claim 7, is characterized in that, the diameter of described face of cylinder projection is 1mm.
9. lens according to claim 1, is characterized in that, described reflecting surface is fully reflecting surface.
10. a LED light fixture, is characterized in that, comprises the lens described in LED light source and claim 1 to 9 any one, and described LED light source is fixed in the storage tank of described lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210502097.7A CN103851363B (en) | 2012-11-30 | 2012-11-30 | LED lamp and lens thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210502097.7A CN103851363B (en) | 2012-11-30 | 2012-11-30 | LED lamp and lens thereof |
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| Publication Number | Publication Date |
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| CN103851363A true CN103851363A (en) | 2014-06-11 |
| CN103851363B CN103851363B (en) | 2017-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210502097.7A Active CN103851363B (en) | 2012-11-30 | 2012-11-30 | LED lamp and lens thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108692294A (en) * | 2018-05-28 | 2018-10-23 | 深圳市朗恒电子有限公司 | A kind of special-shaped lens |
| CN108709497A (en) * | 2018-04-11 | 2018-10-26 | 中国铁道科学研究院 | A kind of contact net geometric parameter detection device |
| CN108800045A (en) * | 2017-10-10 | 2018-11-13 | 长城汽车股份有限公司 | Luminescent system and car light |
| CN108826216A (en) * | 2017-10-10 | 2018-11-16 | 长城汽车股份有限公司 | Lens and luminescence component |
| CN108870308A (en) * | 2017-10-10 | 2018-11-23 | 长城汽车股份有限公司 | Luminescence component |
| CN111734971A (en) * | 2019-03-19 | 2020-10-02 | 丸茂电机株式会社 | Wall surface illuminating lamp and lighting fixture using the same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108800045A (en) * | 2017-10-10 | 2018-11-13 | 长城汽车股份有限公司 | Luminescent system and car light |
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| CN108870308A (en) * | 2017-10-10 | 2018-11-23 | 长城汽车股份有限公司 | Luminescence component |
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| CN108709497A (en) * | 2018-04-11 | 2018-10-26 | 中国铁道科学研究院 | A kind of contact net geometric parameter detection device |
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| CN111734971A (en) * | 2019-03-19 | 2020-10-02 | 丸茂电机株式会社 | Wall surface illuminating lamp and lighting fixture using the same |
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| CN103851363B (en) | 2017-05-03 |
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