CN102367939B - Reflection type automobile LED (light emitting diode) head lamp passing beam optical system - Google Patents
Reflection type automobile LED (light emitting diode) head lamp passing beam optical system Download PDFInfo
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- CN102367939B CN102367939B CN 201110403141 CN201110403141A CN102367939B CN 102367939 B CN102367939 B CN 102367939B CN 201110403141 CN201110403141 CN 201110403141 CN 201110403141 A CN201110403141 A CN 201110403141A CN 102367939 B CN102367939 B CN 102367939B
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Abstract
The invention discloses a reflection type automobile LED (light emitting diode) head lamp passing beam optical system. The optical system comprises a white light LED module (1), a non-spherical surface paraboloid alignment reflector (2), a second paraboloid reflector (3), a diaphragm plate (4) and a light-projection lens (5). The optical system is characterized in that the light sent by the LED module (1) light source passes through a first focal point of the non-spherical surface paraboloid alignment reflector (2), and then passes the second paraboloid reflector (3); then the main light ray of the light beam is reflected 45 degrees so as to form a second focal point; the diaphragm plate (4) is positioned at the second focal point; a front focal point of the light-projection lens (5) and a focal point of the second paraboloid reflector (3) are coincided or a little defocused; and the light beam is projected by the light-projection lens (5) so as to achieve lighting, thereby forming an LED automobile head lamp passing lamp lighting system. The optical system disclosed by the invention can emit a lighting light beam which fully meets the relative head lamp passing beam standards at home and abroad, and provides enough pavement illumination and better avoids the influence of glare on drivers of vehicles on different driveways; the LED light source (module) with the energy consumption of 5-15W is used to replace a passing beam system based on traditional 55W and more than 55W light sources such as a tungsten halide lamp and a xenon lamp; and lighting effect which is superior to that of a traditional head lighting passing beam optical system is realized.
Description
Technical field
The invention belongs to optical technical field, be specifically related to that a kind of what provide road lighting to automobile driver is the dipped beam optical system of the car headlamp of light source based on LED.
Background technology
The dim head lights system that the current mobility car uses can provide road lighting as automobile driver.According to domestic and international headlamp standard, the dipped beam system should cause in the situation of dazzle the road opposite driver that sends a car avoiding, provide the road lighting of enough horizontal widths to illuminate adjacent lane, and can throw light on simultaneously the track at a distance, judge that to the driver road surface situation provides convenience.
The car light standard GB4599-2007 " car headlamp is joined performance " that China adopts is the relevant laws and regulations " E/ECE/324 Addendum 1:Regulations No.1 and No.2 " with reference to Economic Commission for Europe.According to the GB standard, automotive headlight dipped beam system need to be in car light the place ahead 25 meters form a horizontal extension and reach 7920mm, extends perpendicular reaches the rectangular light spot of 1250mm; Simultaneously, at the right half part of hot spot, superposeed from the horizontal by 15 ° rectangular light spot on the rectangular light spot basis.The upper edge of whole hot spot will form a clearly dead line in test screen, i.e. the left-half level of dead line, and right half part is from the horizontal by 15 °; Simultaneously, should there be a suitable clear zone particular point illumination below, the turning point of dead line.
Existing automobile headlight low beam system mainly with halogen tungsten lamp and xenon lamp as light source, the optical system that adopts comprises quadratic surface reflector-baffle plate-lens combination and free-form surface reflector, there are the following problems: 1. use halogen tungsten lamp as light source, want to produce the illumination that meets the demands, its power requirement is very high, and the employed halogen tungsten lamp of car light has strict light source standard and classification, thereby the operating cost of system is very high; 2. head lamp system need to be at the long-play at night, and the life-span of halogen tungsten lamp is relatively short, thereby needs airport frequent bulb, and maintenance cost is also higher; 3. no matter be to adopt quadratic surface reflector-baffle plate-lens combination or adopt free-form surface reflector, the light of light source outgoing has quite a few by baffle plate or aluminium sunshade gear and absorbs, and whole optical system efficiency is very limited; 4. the hot spot dead line that adopts free-form surface reflector to realize is usually clear not, has the hot spot burr.
Summary of the invention
For defects, the object of the present invention is to provide a kind of formula automobile LED headlamp dipped beam optical system of turning back, that single of use or many high power white LED modules are as light source, by the parabolic collimating reflectors of aspheric surface, the second paraboloid, the horizontal edge of a knife and the oblique edge of a knife aperture plate of 15 degree centered by optical axis, the light projector lens are realized the illumination of dipped headlight of automobile headlight.
The formula automobile LED headlamp dipped beam optical system of turning back provided by the invention, comprise the white light LEDs module, the parabolic collimating reflectors of aspheric surface, the second paraboloid, aperture plate and light projector lens form, white light LEDs die set light source geometric center places the first focus place of the parabolic collimating reflectors of aspheric surface, the second paraboloid is positioned at the below of the parabolic collimating reflectors of aspheric surface, the place ahead of the second paraboloid is provided with the light projector lens, aperture plate is positioned near the front focus of light projector lens, it is characterized in that: the light that described LED die set light source sends is through the first focus place of the parabolic collimating reflectors of aspheric surface, again through the second paraboloid, light beam chief ray 45 degree of turning back are formed the second focus, place aperture plate at the second Jiao Chu, the front focus of light projector lens overlaps or a little out of focus with the second paraboloid focus, light beam is gone out illumination through the light projector lens projects, forms LED dipped headlight of automobile headlight illuminator.
Described white light LEDs module is the 10W white light LEDs of single encapsulation of high-power multi-core sheet, or adopts the light source module of many white light LED array, light source power size 5-15W, and the light-emitting area normal of white LED light source module is perpendicular to the first paraboloid symmetry axis.
The length of the parabolic collimating reflectors of described aspheric surface is 20-100 mm, and bore is half bore of 30-150mm, and the first focal length is 5-50mm, and inner surface adopts high reflectance minute surface plated film, and reflectivity reaches more than 95%.
Described the second paraboloid is 45 degree turn back off axis paraboloid mirror reflector or total reflection prisms, its 45 degree off axis paraboloid mirror reflector symmetry axis of turning back is parallel to the parabolic collimating reflectors symmetry axis of aspheric surface, its length is 20-100 mm, and bore is 50-300 mm, and focal length is 18-105 mm.
The front focus of described light projector lens is out of focus 7mm near the second paraboloid focus and forward, the plane of incidence of prism with turn back a little, and the optical axis coincidence of light projector lens, the relative aperture of the relative aperture of light projector lens and the second paraboloid outgoing beam is suitable.
Described aperture plate is the aperture plate that the horizontal edge of a knife and 15 centered by optical axis is spent the oblique edge of a knife.
The present invention, can send and satisfy the illuminating bundle of relevant dim head lights standard both at home and abroad fully, and enough road illuminations are provided and avoid preferably dazzle for heteropleural track vehicle driver's impact, disturb and help the motor vehicle driving person in time to see (or front) pavement behavior in the place ahead clearly to get rid of driving.Reduced the energy consumption of system, the hot spot that system is sent meet the demands by optical design, and improve it to the utilization rate of luminous energy.Only realize for based on the substituting of the dipped beam system of traditional 55W and above light source halogen tungsten lamp and xenon lamp with the led light source (group) of energy consumption 5-15W, and the illuminating effect of realizing more is better than traditional headlight dipped beam optical system.
Description of drawings
Fig. 1 is that the present invention collimates through parabola, the structural representation of the dipped beam optical system that focuses on through off axis paraboloid mirror again.
Fig. 2 is that the present invention assembles through ellipsoid, the structural representation of the dipped beam optical system of turning back through the plane again.
Fig. 3 is that the present invention collimates through parabola, the index path of the dipped beam optical system that focuses on through off axis paraboloid mirror again.
Fig. 4 is that the present invention assembles through ellipsoid, the index path of the dipped beam optical system of turning back through the plane again.
Fig. 5 is the 25m optic test screen schematic diagram at a distance of dipped beam system of the car headlamp of GB GB4599-2007 " car headlamp is joined performance " regulation.
Fig. 6 corresponds respectively to the illumination plane distribution tonsure figure that Fig. 1 and Fig. 2 form at test panel based on the dipped beam optical system of the car headlamp of led light source.
Among the figure: 1.LED light source, the 2. parabolic collimating reflectors of aspheric surface, 3. the second paraboloid, 4. aperture plate, 5. light projector lens.
The specific embodiment
The formula of turning back automobile LED headlamp dipped beam optical system, comprise white light LEDs module 1, the parabolic collimating reflectors 2 of aspheric surface, the second paraboloid 3, aperture plate 4 and light projector lens 5 form, white LED light source 1 geometric center places the first focus place of the parabolic collimating reflectors 2 of aspheric surface, the second paraboloid 3 is positioned at the below of the parabolic collimating reflectors 2 of aspheric surface, the place ahead of the second paraboloid 3 is provided with light projector lens 5, aperture plate 4 is positioned near the front focus of light projector lens 5, the light that white light LEDs module 1 light source sends is through the first focus place of the parabolic collimating reflectors 2 of aspheric surface, again through the second paraboloid 3, light beam chief ray 45 degree of turning back are formed the second focus, place aperture plate 4 at the second Jiao Chu, the front focus of light projector lens 5 overlaps or a little out of focus with the second paraboloid 3 focuses, light beam is gone out illumination through the light projector lens projects, forms LED dipped headlight of automobile headlight illuminator.
Embodiment 1:
As shown in Figure 1 and Figure 2, be that the present invention collimates through parabola, the structural representation of the dipped beam optical system that focuses on through half paraboloid again; Adopt the 10W white light LEDs 1 of single encapsulation of high-power multi-core sheet as light source, model C REE XML; 45 degree off axis paraboloid mirror reflector 2 length of turning back are 45mm, bore is half of 60mm, focal length is 5mm, it is that length is 50mm that light beam enters bore, bore is 204mm, focal length is 52mm's, the paraboloidal some of the second paraboloid, be 45 and spend the off axis paraboloid mirror reflector of turning back, aperture plate 4 is placed at focus place at this off axis paraboloid mirror, the bore of light projector lens 5 is 80mm, radius of curvature is 45mm, and front focus is 67mm, and the front focus of light projector lens 5 is turned back near off axis paraboloid mirror reflector 2 focuses and out of focus 5-10mm forward at 45 degree, the 45 degree off axis paraboloid mirror reflector 4 bore directions of turning back are turned back a little with the aperture plates 4 of the horizontal edge of a knife centered by optical axis and the oblique edge of a knife of 15 degree, and with the optical axis coincidence of light projector lens 5.
Embodiment 2:
As shown in Figure 3, Figure 4, be that the present invention assembles through ellipsoid, the structural representation of the dipped beam optical system of turning back through the plane again; Adopt the 10W white light LEDs of single encapsulation of high-power multi-core sheet as light source, model C REE XML; The parabolic collimating reflectors 2 of aspheric surface adopts ellipsoidal reflector, its length is 60mm, bore is half of 60mm, the first focal length is 8mm, the second focal length is 112mm, it is that length is 61.8mm that light beam enters bore, the length of side is the total reflection prism at 30.9mm isosceles right angle, the 45 degree total reflections light beams of turning back, aperture plate 4 is placed at the second focus place after light beam is turned back, the bore of light projector lens is 80mm, radius of curvature is 50mm, and front focus is 80mm, and the front focus of light projector lens is out of focus 7mm near the total reflection prism focus and forward, the plane of incidence of prism is turned back a little with the aperture plates 4 of the horizontal edge of a knife centered by optical axis and the oblique edge of a knife of 15 degree, and with the optical axis coincidence of light projector lens 5.
By shown in Figure 5, it is the 25m optic test screen schematic diagram at a distance of dipped beam system of the car headlamp of GB GB4599-2007 " car headlamp is joined performance " regulation; The dipped beam optical system light source led of the automobile LED headlamp that embodiment 1 or 2 is combined is lighted, observe intensity of illumination distribution at 25m test panel far away, and do fine setting, to satisfy the requirement of automobile headlight low beam illumination, the illumination of 75R and 50R can reach lx, and other key point also meets the demands.
Being known by Fig. 6, is to correspond respectively to the illumination plane distribution tonsure figure that the dipped beam optical system based on the car headlamp of led light source of Fig. 1 and Fig. 3 forms at test panel.
The present invention has following characteristics:
1. use LED as light source, power is little, and system energy consumption is little, and the life-span is long;
2. structure is utilized two paraboloidal combinations as shown in Figure 1, by the collimation of led light source with assemble again the light beam obtain suitable beam size, form the vehicle LED dipped headlight illuminating bundle with the coupling of the relative aperture of light projector light projector lens, the luminous flux utilization rate is high, and whole lamp energy consumption is little;
3. structure is utilized the combination of ellipsoid and plane reflection as shown in Figure 3, the led light source that is positioned at ellipsoid the first focus place converges to the light beam that the second focus place forms suitable beam size, form the vehicle LED dipped headlight illuminating bundle with the coupling of the relative aperture of light projector light projector lens, the luminous flux utilization rate is high, and whole lamp energy consumption is little;
4, the automobile LED headlamp compact conformation of two kinds of similar structures, installation and maintenance is convenient;
5. can adopt the led light source of high-power single multi-chip package, only the LED of a 10W just can realize given Illumination Distribution and illumination requirement at the target illumination face, thereby can substitute conventional light source halogen tungsten lamp and the xenon lamp of high energy consumption.
Claims (5)
1. the formula of turning back automobile LED headlamp dipped beam optical system, by white light LEDs module (1), the parabolic collimating reflectors (2) of aspheric surface, the second paraboloid (3), aperture plate (4) and light projector lens (5) form, the geometric center of white light LEDs die set light source (1) places the first focus place of the parabolic collimating reflectors of aspheric surface (2), the second paraboloid (3) is positioned at the below of the parabolic collimating reflectors of aspheric surface (2), the place ahead along optical propagation direction the second paraboloid (3) is provided with light projector lens (5), aperture plate (4) is positioned near the object focus of light projector lens (5), it is characterized in that: the light beam that described LED die set light source (1) sends from the focus of the parabolic collimating reflectors of aspheric surface (2), again through the second paraboloid (3), light beam chief ray 45 degree of turning back are formed and to converge to the second parabolic focus place, aperture plate (4) is placed at this focus place, the object focus of described light projector lens (5) is near the second paraboloid (3) focus and along optical propagation direction out of focus 5-10mm, the relative aperture of the relative aperture of light projector lens (5) and the second paraboloid (3) outgoing beam is suitable, light beam throws away illumination through light projector lens (5), forms LED dipped headlight of automobile headlight illuminator.
2. the formula automobile LED headlamp dipped beam optical system of turning back according to claim 1, it is characterized in that: described white light LEDs module (1) is the 10W white light LEDs of single encapsulation of high-power multi-core sheet, or adopt the module of many white light LED array, light source power size 5-15W, the light-emitting area normal of white LED light source module is perpendicular to parabolic collimating reflectors (2) symmetry axis of aspheric surface.
3. the formula automobile LED headlamp dipped beam optical system of turning back according to claim 1, it is characterized in that: the length of described aspheric surface paraboloid (2) is 20-100 mm, bore is half bore of 30-150mm, the first focal length is 5-50mm, inner surface adopts high reflectance minute surface plated film, and reflectivity reaches more than 95%.
4. the formula automobile LED headlamp dipped beam optical system of turning back according to claim 1, it is characterized in that: described the second paraboloid (3) is the 45 degree off axis paraboloid mirror reflectors of turning back, its 45 degree off axis paraboloid mirror reflector symmetry axis of turning back is parallel to parabolic collimating reflectors (2) symmetry axis of aspheric surface, its length is 20-100 mm, bore is 50-300 mm, and focal length is 18-105 mm.
5. the formula automobile LED headlamp dipped beam optical system of turning back according to claim 1 is characterized in that: described aperture plate (4) is the horizontal edge of a knife and the oblique edge of a knife aperture plate of 15 degree centered by optical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110403141 CN102367939B (en) | 2011-12-07 | 2011-12-07 | Reflection type automobile LED (light emitting diode) head lamp passing beam optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110403141 CN102367939B (en) | 2011-12-07 | 2011-12-07 | Reflection type automobile LED (light emitting diode) head lamp passing beam optical system |
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| Publication Number | Publication Date |
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| CN102367939A CN102367939A (en) | 2012-03-07 |
| CN102367939B true CN102367939B (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110403141 Expired - Fee Related CN102367939B (en) | 2011-12-07 | 2011-12-07 | Reflection type automobile LED (light emitting diode) head lamp passing beam optical system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI573952B (en) * | 2014-05-16 | 2017-03-11 | 王正 | Multi lighting source vehicle lamp |
| DE102014226646A1 (en) * | 2014-12-19 | 2016-06-23 | Osram Gmbh | lighting device |
| US10514145B1 (en) * | 2018-12-20 | 2019-12-24 | Valeo North America, Inc. | Optical systems for a headlamp |
| CN110107857B (en) | 2019-06-04 | 2024-04-12 | 华域视觉科技(上海)有限公司 | Near light III district lighting module, vehicle head-light and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005158362A (en) * | 2003-11-21 | 2005-06-16 | Stanley Electric Co Ltd | Lighting fixture for vehicle |
| CN101097052B (en) * | 2006-06-27 | 2010-09-15 | 财团法人工业技术研究院 | Illuminating apparatus and composite structure thereof |
| JP2008171604A (en) * | 2007-01-10 | 2008-07-24 | Toyoda Gosei Co Ltd | Rear combination lamp |
| CN201706353U (en) * | 2010-05-28 | 2011-01-12 | 帝宝工业股份有限公司 | Vehicle optical module |
| CN102095151B (en) * | 2011-01-20 | 2012-08-08 | 华南理工大学 | LED (light-emitting diode) automobile high beam light with mixed light distribution system |
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