CN110332497B - Lighting assembly - Google Patents

Lighting assembly Download PDF

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Publication number
CN110332497B
CN110332497B CN201910725216.7A CN201910725216A CN110332497B CN 110332497 B CN110332497 B CN 110332497B CN 201910725216 A CN201910725216 A CN 201910725216A CN 110332497 B CN110332497 B CN 110332497B
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Prior art keywords
lens
lighting assembly
light source
incident surface
recited
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CN201910725216.7A
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CN110332497A (en
Inventor
连志鹏
王敏华
陈重
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Xiamen Ruilu Photoelectric Co ltd
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Xiamen Ruilu Photoelectric Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • F21W2107/13—Use or application of lighting devices on or in particular types of vehicles for land vehicles for cycles
    • F21W2107/17—Use or application of lighting devices on or in particular types of vehicles for land vehicles for cycles for motorcycles
    • 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]

Abstract

The invention relates to a lighting component, which comprises at least one LED light source and a lens, wherein the upper half part of the lighting component is divided into a light-shade cut-off line, the lower half part of the lighting component is a semicircular light spot, and the light spot is a light spot conforming to the low beam regulation, so that the problem that the strip-shaped light spot of the light-shade cut-off line formed by the existing low beam light source by utilizing a reflecting cup is not clear enough can be realized through reasonable lamp bead arrangement and the combination of the lenses with optical design.

Description

Lighting assembly
Technical Field
The invention relates to the field of illumination, in particular to an illumination assembly with a cut-off line and meeting low beam regulations.
Background
The light distribution of the dipped headlight of the motorcycle and the electric vehicle should make the dipped headlight have enough illumination and not be glaring. For example. For example, for a motorcycle low beam, its light pattern distribution requirement needs to be determined based on the following points:
(1) The road surface illumination and the illumination width are enough, and the uniformity of the road surface illumination is ensured, so that the enough visible distance is ensured; providing sufficient brightness of the road surface, and the projection width of the light is large enough; providing safety for the driver;
(2) Glare limitation for oncoming vehicle drivers;
(3) The irradiation position and the light intensity performance of the lamp beam;
(4) Providing a certain amount of divergent light and leading edge light for the comfort of the driver.
Therefore, in order to meet the requirements of the vehicle lamp, the low beam light source must be able to cut off the cutoff line. The existing low beam light source utilizes the combined light distribution of the reflecting cup and the lens to enable the low beam LED to be capable of making a cut-off line, but the lens is generally a round, elliptic or square planoconvex lens so as to achieve the light gathering effect, and then the cut-off line is formed through the reflecting design of the reflecting cup, but the light gathering degree of the reflecting cup is not good enough, so that the strip-shaped light spots of the formed cut-off line are not clear enough, namely the cut-off line effect is not obvious enough.
In addition, the design of the dipped headlight with the cut-off line formed by the reflecting cup can lead the whole volume of the dipped headlight to be larger, which is not beneficial to the miniaturization design.
Disclosure of Invention
The invention aims to provide a lighting assembly which solves the problem that a strip-shaped light spot of a cut-off line formed by a light reflecting cup of an existing low beam light source is not clear enough.
The specific scheme is as follows:
the utility model provides a lighting assembly, includes at least one LED light source and a lens, the appearance of lens is the flat structure of general "D" font, it includes as the incident surface of bottom surface, as the exit surface of top surface and as two total reflection surfaces of two opposite outer walls, the intersection point of optical axis A and the incident surface of this lens is defined as O, the focal plane of this lens is located near one side of incident surface, regard intersection point O as the origin, with optical axis A as x-axis and the face perpendicular to this optical axis A forms an xyz three-dimensional coordinate system;
the LED light source is arranged on the focal plane of the lens and is positioned above or below the xz plane, the two total reflection surfaces are symmetrically arranged on two sides of the xy plane, the emergent surface is a curved surface protruding outwards, two intersecting lines formed by the two total reflection surfaces and the incident surface and a conical hyperbola taking the intersecting point O as the center are formed, and the conical hyperbola meets the following conditional expression:
y 2 /a 2 +(x-d) 2 /b 2 ＝1 (1)
e＝c/a (2)
wherein e represents eccentricity, satisfying a>b>0，c 2 ＝a 2 -b 2 ，0<e<1，
25< a <100,5< b <25, d > b >7 are also satisfied.
Further, the curved surface of the exit surface is represented by the formula:
Z＝p 10 *x+p 01 *y+p 20 *x 2 +p 11 *x*y+p 02 *y 2 +p 30 *x 3 +p 21 *x 2 *y+p 12 *x*y 2 +p 03 *y 3 +p 40 *x 4 +p 31 *x 3 *y+p 22 *x 2 *y 2 +p 13 *x*y 3 +p 04 *y 4 +p 50 *x 5 +p 41 *x 4 *y+p 32 *x 3 *y 2 +p 23 *x 2 *y 3 +p 14 *x*y 4 +p 05 *y 5 to represent; wherein, the value range of p is as follows:
p 10 ＝[-1.4550E-02，1.2310E-02]，
p 01 ＝[-8.1220E-03，1.0240E-03]，
p 20 ＝[-1.1870E-02，-6.5230E-03]，
p 11 ＝[-1.1470E-03，5.5810E-04]，
p 02 ＝[-2.8170E-02，-2.7540E-02]，
p 30 ＝[-1.0130E-03，9.9930E-04]，
p 21 ＝[-3.8510E-04，2.7910E-04]，
p 12 ＝[-4.9900E-05，1.7170E-04]，
p 03 ＝[1.0810E-05，9.3250E-05]，
p 40 ＝[-7.3680E-05，4.9730E-05]，
p 31 ＝[-2.4950E-05，1.9080E-05]，
p 22 ＝[-1.5050E-05，5.2570E-07]，
p 13 ＝[5.7630E-08，5.1470E-06]，
p 04 ＝[-8.7150E-05，-8.5320E-05]，
p 50 ＝[-1.9070E-05，1.8080E-05]，
p 41 ＝[-8.4950E-06，5.1100E-06]，
p 32 ＝[-2.1380E-06，2.8450E-06]，
p 23 ＝[-1.2490E-07，1.5390E-06]，
p 14 ＝[-5.7400E-07，-4.2530E-08]，
p 05 ＝[-1.1230E-06，-9.3390E-07]。
further, the curved surfaces of the two total reflection surfaces are obtained by drawing a mold through a conical hyperbola on the incident surface, and the drawing angle is inclined outwards from the incident surface to the emergent surface, wherein the inclination angle alpha=2.5-15 degrees.
Further, the maximum thickness of the lens is positioned at the position of the maximum vertical distance between two intersecting lines formed by the two total reflection surfaces and the emergent surface, and the maximum thickness of the lens is 10-50mm.
Further, the maximum thickness of the lens is 35mm.
Further, the vertical distance between the LED light source and the incidence surface of the lens is 1-10 mm.
Further, the vertical distance between the LED light source and the incidence surface of the lens is 4.2mm.
Further, the incident surface of the lens is an inclined surface inclined in the direction of the exit surface, and the inclination angle β between the exit surface and the yz surface is in the range of 0 ° to 7 °.
Compared with the prior art, the lighting assembly provided by the invention has the following advantages: the lighting component provided by the invention can directly realize the cut-off line of the upper half part and the semicircular light spot of the lower half part through reasonable lamp bead arrangement and combination of lenses with optical design, and the light spot is in accordance with the low beam regulation, and the lighting component has a simple structure and a smaller volume, and is beneficial to application.
Drawings
Fig. 1 shows a schematic perspective view of a lens.
Fig. 2 shows a side view of the illumination assembly of the lens.
Fig. 3 shows a schematic view of the lens incidence plane side.
Fig. 4 shows a light path diagram of light rays emitted from an LED light source in the course of action via a lens.
Fig. 5 shows another light path diagram of the light emitted from the LED light source in the course of the lens action.
Fig. 6 shows a spot diagram formed by the illumination assembly.
Fig. 7 shows a schematic view of another embodiment of a lens.
Detailed Description
For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The invention will now be further described with reference to the drawings and detailed description.
As shown in fig. 1-5, the present embodiment provides a lighting assembly including at least one LED light source 1 and a lens 2, and it should be clear that the LED light source 1 as a low beam light source has a volume much smaller than that of the lens 2, and thus the LED light source 1 can be regarded as a point light source approximately.
The lens 2 has a substantially "D" -shaped flat configuration, and includes an incident surface 20 as a bottom surface, an exit surface 21 as a top surface, and two total reflection surfaces 22 as opposite outer walls, and the lens 2 may be made of an optical plastic and an optical glass material, and has a refractive index of 1.1 to 2.0.
An intersection point of the optical axis a of the lens 2 and the incident surface 20 is defined as O, and a focal plane B of the lens 2 is located on a side close to the incident surface 20 and an intersection point with the optical axis a is defined as P. In this embodiment, for convenience of description, as shown in fig. 2, an xyz three-dimensional coordinate system is formed with the intersection point O as the origin, the optical axis a as the x-axis, and the plane perpendicular to the optical axis a.
The LED light source 1 is disposed on the focal plane B of the lens 2, and is not located on the intersection point P of the focal plane B and the optical axis a, but is located above or below the xz plane. The incident surface 20 of the lens 2 is located on the yz plane, the two total reflection surfaces 22 are symmetrically disposed on two sides of the xy plane, and the exit surface 21 is a curved surface protruding outwards.
Specifically, two intersecting lines 200a and 200b formed by the two total reflection surfaces 22 and the incident surface 20 are conic hyperbolas centered on the intersection point O, which meets the following conditional expression:
y 2 /a 2 +(x-d) 2 /b 2 ＝1 (1)
e＝c/a (2)
wherein e represents eccentricity, satisfying a>b>0，c 2 ＝a 2 -b 2 ，0<e<1，
25< a <100,5< b <25, d > b >7 are also satisfied.
The curved surface of the exit face 21 can be expressed by a surface fitting formula:
Z＝p 10 *x+p 01 *y+p 20 *x 2 +p 11 *x*y+p 02 *y 2 +p 30 *x 3 +p 21 *x 2 *y+p 12 *x*y 2 +p 03 *y 3 +p 40 *x 4 +p 31 *x 3 *y+p 22 *x 2 *y 2 +p 13 *x*y 3 +p 04 *y 4 +p 50 *x 5 +p 41 *x 4 *y+p 32 *x 3 *y 2 +p 23 *x 2 *y 3 +p 14 *x*y 4 +p 05 *y 5 。
wherein the range of p is shown in the following table:
preference value Minimum value Maximum value
p 10 -1.1190E-03 -1.4550E-02 1.2310E-02
p 01 -3.5490E-03 -8.1220E-03 1.0240E-03
p 20 -9.1950E-03 -1.1870E-02 -6.5230E-03
p 11 -2.9460E-04 -1.1470E-03 5.5810E-04
p 02 -2.7850E-02 -2.8170E-02 -2.7540E-02
p 30 -7.0650E-06 -1.0130E-03 9.9930E-04
p 21 -5.3010E-05 -3.8510E-04 2.7910E-04
p 12 6.0910E-05 -4.9900E-05 1.7170E-04
p 03 5.2030E-05 1.0810E-05 9.3250E-05
p 40 -1.1970E-05 -7.3680E-05 4.9730E-05
p 31 -2.9360E-06 -2.4950E-05 1.9080E-05
p 22 -7.2610E-06 -1.5050E-05 5.2570E-07
p 13 2.6020E-06 5.7630E-08 5.1470E-06
p 04 -8.6240E-05 -8.7150E-05 -8.5320E-05
p 50 -4.9500E-07 -1.9070E-05 1.8080E-05
p 41 -1.6920E-06 -8.4950E-06 5.1100E-06
p 32 3.5340E-07 -2.1380E-06 2.8450E-06
p 23 7.0720E-07 -1.2490E-07 1.5390E-06
p 14 -3.0820E-07 -5.7400E-07 -4.2530E-08
p 05 -1.0290E-06 -1.1230E-06 -9.3390E-07
The curved surfaces of the two total reflection surfaces 22 are obtained by drawing a conical hyperbola on the incident surface 20, wherein the drawing angle is inclined from the incident surface 20 to the emergent surface 21, and the curved surfaces are drawn outwards at a fixed angle alpha, wherein alpha=2.5 DEG to 15 deg.
As shown in fig. 4 and 5, the light emitted from the LED light source 1 in the present embodiment forms a light spot as shown in fig. 6 after being processed by the lens 2, the light spot being a light spot with a cut-off line in an upper half and a semicircular light spot in a lower half, and the light spot being a light spot meeting the relevant regulations of low beam regulations.
In this embodiment, the maximum thickness of the lens 2 is 10-50mm, and the maximum thickness is located at the maximum vertical distance between two intersecting lines formed by the two total reflection surfaces 22 and the exit surface 21, and is more preferably 35mm.
In the present embodiment, the vertical distance between the LED light source 1 and the lens 2 is preferably 1 to 10mm, more preferably 4.2mm, and since the LED light source 1 is located on the focal plane B of the lens 2, the distance between the LED light source 1 and the lens 2 is also the vertical distance from the focal plane B to the incident surface 20.
Referring to fig. 7, in the present embodiment, the incident surface 20 of the lens 2 is a slope inclined toward the exit surface 21, and the inclined angle β between the incident surface 20 and the yz plane ranges from 0 ° to 7 °, so that the inclined incident surface 20 can form a light spot having a more pronounced cutoff line. It should be noted that, in this embodiment, the focal plane B and the optical axis a refer to the original focal plane and the original optical axis when the inclination angle of the incident surface 20 of the lens is 0, that is, when the incident surface 20 is perpendicular to the optical axis a.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. A lighting assembly comprising at least one LED light source and a lens, characterized in that: the lens has a flat structure in a shape of a D, and comprises an incident surface serving as a bottom surface, an emergent surface serving as a top surface and two total reflection surfaces serving as opposite outer walls, wherein an intersection point of an optical axis A of the lens and the incident surface is defined as O, a focal plane of the lens is positioned on one side close to the incident surface, the intersection point O is taken as an origin, and an xyz three-dimensional coordinate system is formed by taking the optical axis A as an x axis and a surface perpendicular to the optical axis A;
the LED light source is arranged on the focal plane of the lens and is positioned above or below the xz plane, the two total reflection surfaces are symmetrically arranged on two sides of the xy plane, the emergent surface is a curved surface protruding outwards, two intersecting lines formed by the two total reflection surfaces and the incident surface and a conical hyperbola taking the intersecting point O as the center are formed, and the conical hyperbola meets the following conditional expression:
y 2 /a 2 +(x-d) 2 /b 2 =1; and
e＝c/a；
wherein e represents eccentricity, satisfying a>b>0，c 2 ＝a 2 -b 2 ，0<e<1，
Also satisfy 25< a <100,5< b <25, d > b >7;
the curved surface of the exit surface is represented by the equation:
Z＝p 10 *x+p 01 *y+p 20 *x 2 +p 11 *x*y+p 02 *y 2 +p 30 *x 3 +p 21 *x 2 *y+p 12 *x*y 2 +p 03 *y 3 +p 40 *x 4 +p 31 *
x 3 *y+p 22 *x 2 *y 2 +p 13 *x*y 3 +p 04 *y 4 +p 50 *x 5 +p 41 *x 4 *y+p 32 *x 3 *y 2 +p 23 *x 2 *y 3 +p 14 *x*y 4 +p 05 *y 5 to represent; wherein, the value range of p is as follows:
p 10 ＝[-1.4550E-02，1.2310E-02]，
p 01 ＝[-8.1220E-03，1.0240E-03]，
p 20 ＝[-1.1870E-02，-6.5230E-03]，
p 11 ＝[-1.1470E-03，5.5810E-04]，
p 02 ＝[-2.8170E-02，-2.7540E-02]，
p 30 ＝[-1.0130E-03，9.9930E-04]，
p 21 ＝[-3.8510E-04，2.7910E-04]，
p 12 ＝[-4.9900E-05，1.7170E-04]，
p 03 ＝[1.0810E-05，9.3250E-05]，
p 40 ＝[-7.3680E-05，4.9730E-05]，
p 31 ＝[-2.4950E-05，1.9080E-05]，
p 22 ＝[-1.5050E-05，5.2570E-07]，
p 13 ＝[5.7630E-08，5.1470E-06]，
p 04 ＝[-8.7150E-05，-8.5320E-05]，
p 50 ＝[-1.9070E-05，1.8080E-05]，
p 41 ＝[-8.4950E-06，5.1100E-06]，
p 32 ＝[-2.1380E-06，2.8450E-06]，
p 23 ＝[-1.2490E-07，1.5390E-06]，
p 14 ＝[-5.7400E-07，-4.2530E-08]，
p 05 ＝[-1.1230E-06，-9.3390E-07]。
2. a lighting assembly as recited in claim 1, wherein: the curved surfaces of the two total reflection surfaces are obtained by drawing a mold through a conical hyperbola on the incident surface, and the drawing angle is inclined outwards from the incident surface to the emergent surface, wherein the inclination angle alpha=2.5-15 degrees.
3. A lighting assembly as recited in claim 1, wherein: the maximum thickness of the lens is positioned at the position with the maximum vertical distance between two intersecting lines formed by the two total reflection surfaces and the emergent surface, and the maximum thickness of the lens is 10-50mm.
4. A lighting assembly as recited in claim 3, wherein: the maximum thickness of the lens is 35mm.
5. A lighting assembly as recited in claim 1, wherein: the vertical distance between the LED light source and the incidence surface of the lens is 1-10 mm.
6. A lighting assembly as recited in claim 5, wherein: the vertical distance between the LED light source and the incidence surface of the lens is 4.2mm.
7. A lighting assembly as recited in claim 1, wherein: the incident surface of the lens is an inclined surface inclined towards the direction of the emergent surface, and the inclination angle beta between the emergent surface and the yz surface is in the range of 0-7 degrees.
CN201910725216.7A 2019-08-07 2019-08-07 Lighting assembly Active CN110332497B (en)

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Publication number Priority date Publication date Assignee Title
CN111735027A (en) * 2019-11-26 2020-10-02 华域视觉科技(上海)有限公司 Car light module, vehicle headlamp and vehicle

Citations (5)

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Publication number Priority date Publication date Assignee Title
JP2009238469A (en) * 2008-03-26 2009-10-15 Stanley Electric Co Ltd Projection lens for lamp, optical unit for vehicle, and lamp for vehicle
JP2012160356A (en) * 2011-02-01 2012-08-23 Stanley Electric Co Ltd Vehicular lamp
CN204313221U (en) * 2014-11-28 2015-05-06 广州市雷腾照明科技有限公司 A kind of strip hot spot lens
CN207702375U (en) * 2018-01-09 2018-08-07 深圳市佳美达光电有限公司 Bicycle headlamp compound lens
CN210107265U (en) * 2019-08-07 2020-02-21 厦门瑞律光电有限公司 Lighting assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009238469A (en) * 2008-03-26 2009-10-15 Stanley Electric Co Ltd Projection lens for lamp, optical unit for vehicle, and lamp for vehicle
JP2012160356A (en) * 2011-02-01 2012-08-23 Stanley Electric Co Ltd Vehicular lamp
CN204313221U (en) * 2014-11-28 2015-05-06 广州市雷腾照明科技有限公司 A kind of strip hot spot lens
CN207702375U (en) * 2018-01-09 2018-08-07 深圳市佳美达光电有限公司 Bicycle headlamp compound lens
CN210107265U (en) * 2019-08-07 2020-02-21 厦门瑞律光电有限公司 Lighting assembly

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