CN202993060U - LED (light-emitting diode) lens for high beam illumination of vehicle - Google Patents

LED (light-emitting diode) lens for high beam illumination of vehicle Download PDF

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Publication number
CN202993060U
CN202993060U CN2012207259333U CN201220725933U CN202993060U CN 202993060 U CN202993060 U CN 202993060U CN 2012207259333 U CN2012207259333 U CN 2012207259333U CN 201220725933 U CN201220725933 U CN 201220725933U CN 202993060 U CN202993060 U CN 202993060U
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China
Prior art keywords
led
lens
motor vehicle
vehicle far
far lighting
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Active
Application number
CN2012207259333U
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Chinese (zh)
Inventor
宋德纪
冯震
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SHANDONG HUATAI LIGHT SOURCE CO Ltd
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SHANDONG HUATAI LIGHT SOURCE CO Ltd
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Priority to CN2012207259333U priority Critical patent/CN202993060U/en
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Abstract

The utility model provides an LED lens for high beam illumination of a vehicle and belongs to the technical field of optical technology. The LED lens for high beam illumination of the vehicle structurally comprises an LED device and a lens body with round front surface. The lens body includes a free-form curved surface combination collimation plane and a groove-structured light emission surface, wherein the groove-structured light emission surface is arranged in front of the free-form curved surface combination collimation plane. The free-form curved surface combination collimation plane includes a total reflection curve portion and a refraction curve portion, wherein the opening end of the front portion of the refraction curve portion is connected with the rear end of the total reflection curve portion to enable the rear end of the lens to form a groove pit. Compared with the prior art, the LED lens for high beam illumination of the vehicle has the advantages of reasonable design, simple structure and good using effect, and can meet requirements of illumination distribution to guarantee that a vehicle driver can timely obtain information about a distant road surface.

Description

A kind of LED lens for the motor vehicle far lighting
Technical field
The utility model relates to optical technical field, specifically a kind of LED lens for the motor vehicle far lighting.
Background technology
The high beam that configures on motor vehicle can provide road lighting at a distance for automobile driver, helps the driver in time to distinguish the road surface situation, is applicable to road speed when very fast.Comprise the motor vehicles such as large and small type vehicle and motorcycle, all need to be equipped with corresponding high beam.
What China adopted all formulates with reference to the relevant laws and regulations of Economic Commission for Europe.Development along with the LED technology, consider the outstanding characteristics of LED illumination, comprise low energy consumption, long-life, vibration strength etc., Economic Commission for Europe has put into effect corresponding LED headlamp standard, and China has also released the GB GB 25991-2010 " vapour Vehicular LED headlamp " that is directed to the LED headlamp simultaneously.Requirement according to GB, motor vehicle far-reaching lamp should provide the road lighting of enough horizontal widths to illuminate adjacent lane, provides simultaneously the place ahead enough illuminations at a distance, namely on 25m test panel at a distance, should satisfy maximal illumination and be distributed near central point HV point, with the far lighting that guarantees to provide sufficient; Simultaneously, to the zone of left and right 1125mm, and reach respectively 24lx and 6lx at test panel center HV point to the zone of left and right 2250mm, guarantee distance light system enough width that can throw light on the road surface a long way off.In addition, maximal illumination must not be lower than 48lx, and not higher than 240lx.
At present, common motor vehicle far-reaching lamp generally adopts halogen tungsten lamp and xenon lamp as light source, coordinates Rotational Symmetry reflector or free-form surface reflector take parabola as bus.Because the life-span of halogen tungsten lamp is partially short, maintenance and replacing are comparatively frequent, and no matter are to adopt Rotational Symmetry reflector or free-form surface reflector, and general size is bigger than normal, is difficult for coordinating with motor vehicle.
Summary of the invention
For defects, the utility model proposes a kind of LED lens for the motor vehicle far lighting, but cooperated with LED device (module) consists of motor vehicle far lighting system.Utilize the high light efficiency of LED device and high-energy utilization rate and the apportionment ratio of lens described in the utility model, generally adopt the LED device (module) of 10-15W just can satisfy the requirement of the far lighting that GB GB 25991-2010 " vapour Vehicular LED headlamp " proposes.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of LED lens for the motor vehicle far lighting, comprise that LED device and front end face are circular mirror body, the mirror body comprises free form surface combination collimation plane and trench structure exiting surface, it is anterior that the trench structure exiting surface is arranged on free form surface combination collimation plane, free form surface combination collimation plane comprises total reflection curved portion and refraction curve part, it is interior and identical with its opening direction that refraction curve partly is arranged on the total reflection curved portion, refraction curve part open front end is connected with total reflection curved portion rear end, makes the lens rear ends form a groove hole.
Be used for the LED lens of motor vehicle far lighting, its described LED device is watt class large power chip of single-chip package, and the general power size of LED device is 5-30W.
The LED lens that are used for the motor vehicle far lighting, its described LED device is by the high-power module of low-power LED chip array encapsulation, and the general power size of LED device is 5-30W.
The LED lens that are used for the motor vehicle far lighting, the combined focal length of its described free form surface combination collimation plane is also correspondingly 15-30 mm, the light-emitting window radius is 28-55 mm.
The LED lens that are used for the motor vehicle far lighting, its described total reflection curved portion and refraction curve part are all the curved surfaces that formed around the axis rotation of mirror body by approximate parabolical curve, refraction curve partly is arranged on the place ahead, total reflection curved portion bottom, refraction curve part open front end and total reflection curved portion rear end are connected together around the sidewall that lens axis rotation forms by straight line, make the groove hole become the cylinder groove hole.
The LED lens that are used for the motor vehicle far lighting, the degree of depth that its cylinder groove is cheated is 15-30 mm, the radius of bottom surface, cylinder groove hole is 12-24 mm.
The LED lens that are used for the motor vehicle far lighting, the centre of luminescence of its LED device are placed in the combined focal place of free form surface combination collimation plane.
Be used for the LED lens of motor vehicle far lighting, its described trench structure exiting surface is to combine by offer a grooved cylinder on a circular flat; The surperficial combination of trench structure, can be by upper, middle and lower totally three surface compositions form, wherein the upper and lower part curved surface is the plane, the middle part curved surface is the cylinder of certain curvature, or the upper and lower part curved surface is the certain curvature cylinder, the middle part curved surface is the plane; Can be also only to be comprised of upper and lower two parts, upper curved surface be the plane, and lower curved face is the cylinder of certain curvature, and perhaps upper curved surface is the cylinder of certain curvature, and lower curved face is the plane.
Be used for the LED lens of motor vehicle far lighting, the radius of curvature of its cylinder is 2-2.5m.
The utility model compared with prior art, the beneficial effect that produces is:
1), utilize the luminous characteristics of LED single face, adopt the mode of refraction and total reflection combination, make up by free form surface the light energy that collimation plane collection LED device (module) sends, realize that the luminous flux utilization rate reaches the high collection rate more than 90%;
2), coordinate to adopt large power white light LED part (module), the LED device (module) of 10-15W just can satisfy the requirement of the far lighting that GB GB 25991-2010 " vapour Vehicular LED headlamp " proposes usually, needed light source energy consumption is low;
3), utilize the high integration of free-form surface lens, single lens element can coordinate with LED device (module) easily.Lens sizes can be according to the adjusted size design of the LED device (module) that adopts;
4), adopted the trench structure exiting surface, exiting surface can be divided into the combination on a plurality of planes or the face of cylinder, and by each partial response ground distribution light energy, both guaranteed the horizontal extension that hot spot is enough, also can centered by focus sufficient illumination is provided, and make the whole light extraction efficiency of described lens reach 90%.
Description of drawings
Fig. 1 is the top view for the LED lens of motor vehicle far lighting;
Fig. 2 is the front view for the LED lens of motor vehicle far lighting;
Fig. 3 is the left view for the LED lens of motor vehicle far lighting;
Fig. 4 is the axonometric drawing for the LED lens of motor vehicle far lighting;
Fig. 5 is the 25m optic test screen schematic diagram at a distance of GB GB 25991-2010 " vapour Vehicular LED headlamp ";
Fig. 6 is that the cooperated with LED light source has used the LED lens that are used for the motor vehicle far lighting, forms the luminance effects figure of hot spot on test panel;
Fig. 7 is that the cooperated with LED light source has used the LED lens that are used for the motor vehicle far lighting, forms the illumination illumination rectangular co-ordinate distribution map of hot spot on test panel.
Number in the figure:
1 is the fully reflecting surface of described free form surface combination collimation plane;
2 is the plane of refraction of described free form surface combination collimation plane;
3 is the splicing face of cylinder of described free form surface combination collimation plane;
4 is the plane of described trench structure exiting surface;
5 is the cylinder of described grooved knot exiting surface.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail below.
Part light parallel outgoing after Rotational Symmetry plane of refraction 2 of LED device (or module) outgoing, after remainder light reflects through the face of cylinder 3 that is used for splicing, again via after 1 reflection of Rotational Symmetry fully reflecting surface, to the outgoing of trench structure exiting surface, by energy distribution and the diffusion on grooved surface, form the intensity of illumination distribution to provisioning request on the target illumination face.
1. select single large power white light LED part XML that Cree company produces as light source, the chip light emitting area of this device is 4 mm 2, maximal input is 10W, maximum output light flux 1000lm; It is 1.493 acrylic plastics that lens material has been selected refractive index.
2. the combined focal length of free form surface combination collimation plane is 16mm, and the radius of cylinder bottom surface (openend of light source is installed) is 13.5mm, and the exiting surface radius is 44mm.The XML white light LEDs is inserted reflector inside by the opening part of cylinder bottom surface, and the centre of luminescence of chip is positioned at the focus place of collimating reflectors;
3. the trench structure exiting surface is combined by a circular flat 4 and a cylinder 5, and surperficial combination is selected the upper, middle and lower combination of totally three curved surfaces, and wherein the upper and lower part curved surface is plane 4, and the middle part curved surface is the cylinder 5 of certain curvature; The mean radius of curvature of cylinder 5 is 2.35m.
4.XML the light that white light LEDs sends is through free form surface combination collimation plane collimation, again through the secondary light-distribution of trench structure exiting surface, the driving beam that can outgoing satisfies GB GB 25991-2010 " vapour Vehicular LED headlamp ", light spot shape is approximately an ellipse, and can see a comparatively significantly center focus in the border circular areas of the radius 150mm centered by HV, form an illumination maximum regional, average illumination value in this zone is greater than 80lx, maximal illumination is near 100lx, guarantee to adopt the LED motor vehicle far-reaching lamp of these lens to provide sufficient far lighting for the driver, simultaneously, on 25m test panel far away, to the zone of left and right 1125mm, and reach respectively 42lx and 27lx at test panel center HV point to the zone of left and right 2250mm, meet the requirement of GB GB 25991-2010 " vapour Vehicular LED headlamp ".
5. the combination of above disclosed trench structure exiting surface, be only the type for ease of using of the utility model, but the utility model is not limited thereto, and the variation that the technical staff of any this area can think all should be within the utility model protection domain.
Coordinate the XML chip to use the experimental results of described lens as follows:
Test item Standard-required Testing result (lx) Meet judgement
92.8 Meet
The point 91.6 Meet
Extremely (minimum of a value) 41.3 Meet
Extremely (minimum of a value) 42.0 Meet
Extremely (minimum of a value) 23.6 Meet
Extremely (minimum of a value) 22.9 Meet
Except the described technical characterictic of specification, be those skilled in the art's known technology.

Claims (9)

1. LED lens that are used for the motor vehicle far lighting, it is characterized in that comprising that LED device and front end face are circular mirror body, the mirror body comprises free form surface combination collimation plane and trench structure exiting surface, it is anterior that the trench structure exiting surface is arranged on free form surface combination collimation plane, free form surface combination collimation plane comprises total reflection curved portion and refraction curve part, it is interior and identical with its opening direction that refraction curve partly is arranged on the total reflection curved portion, refraction curve part open front end is connected with total reflection curved portion rear end, makes the lens rear ends form a groove hole.
2. the LED lens for the motor vehicle far lighting according to claim 1, is characterized in that described LED device is watt class large power chip of single-chip package, and the general power size of LED device is 5-30W.
3. the LED lens for the motor vehicle far lighting according to claim 1, is characterized in that described LED device by the high-power module of low-power LED chip array encapsulation, and the general power size of LED device is 5-30W.
4. the LED lens for the motor vehicle far lighting according to claim 1, is characterized in that the combined focal length of described free form surface combination collimation plane correspondingly also is 15-30 mm, and the light-emitting window radius is 28-55 mm.
5. LED lens for the motor vehicle far lighting according to claim 1, it is characterized in that described total reflection curved portion and refraction curve part is all the curved surfaces that formed around the axis rotation of mirror body by approximate parabolical curve, refraction curve partly is arranged on the place ahead, total reflection curved portion bottom, refraction curve part open front end and total reflection curved portion rear end are connected together around the sidewall that lens axis rotation forms by straight line, make the groove hole become the cylinder groove hole.
6. the LED lens for the motor vehicle far lighting according to claim 4, is characterized in that the degree of depth that cylinder groove is cheated is 15-30 mm, and the radius of bottom surface, cylinder groove hole is 12-24 mm.
7. the LED lens for the motor vehicle far lighting according to claim 1, is characterized in that the centre of luminescence of LED device is placed in the combined focal place of free form surface combination collimation plane.
8. the LED lens for the motor vehicle far lighting according to claim 1, is characterized in that described trench structure exiting surface is to combine by offer a grooved cylinder on a circular flat.
9. a kind of LED lens for the motor vehicle far lighting according to claim 8, the radius of curvature that it is characterized in that cylinder is 2-2.5m.
CN2012207259333U 2012-12-26 2012-12-26 LED (light-emitting diode) lens for high beam illumination of vehicle Active CN202993060U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012207259333U CN202993060U (en) 2012-12-26 2012-12-26 LED (light-emitting diode) lens for high beam illumination of vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012207259333U CN202993060U (en) 2012-12-26 2012-12-26 LED (light-emitting diode) lens for high beam illumination of vehicle

Publications (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105351860A (en) * 2015-12-14 2016-02-24 周礼书 Light collecting device and headlamp provided with light splitting structure
CN105387426A (en) * 2015-12-14 2016-03-09 成都恒坤光电科技有限公司 Optical device integrating light collecting function and projection function and headlamp
CN105423216A (en) * 2015-12-14 2016-03-23 成都恒坤光电科技有限公司 Light ray collection device and headlamp
CN107477424A (en) * 2017-01-13 2017-12-15 大连工业大学 A kind of varifocal optical system based on LED light source

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105351860A (en) * 2015-12-14 2016-02-24 周礼书 Light collecting device and headlamp provided with light splitting structure
CN105387426A (en) * 2015-12-14 2016-03-09 成都恒坤光电科技有限公司 Optical device integrating light collecting function and projection function and headlamp
CN105423216A (en) * 2015-12-14 2016-03-23 成都恒坤光电科技有限公司 Light ray collection device and headlamp
CN105423216B (en) * 2015-12-14 2019-04-26 成都恒坤光电科技有限公司 A kind of light collection device and headlamp
CN105351860B (en) * 2015-12-14 2019-12-20 成都恒坤光电科技有限公司 Light collection device and head-light with beam splitting structure
CN107477424A (en) * 2017-01-13 2017-12-15 大连工业大学 A kind of varifocal optical system based on LED light source

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