CN101858563A - Dipped headlight reflector, dipped headlight and motor vehicle - Google Patents
Dipped headlight reflector, dipped headlight and motor vehicle Download PDFInfo
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- CN101858563A CN101858563A CN201010154650A CN201010154650A CN101858563A CN 101858563 A CN101858563 A CN 101858563A CN 201010154650 A CN201010154650 A CN 201010154650A CN 201010154650 A CN201010154650 A CN 201010154650A CN 101858563 A CN101858563 A CN 101858563A
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Abstract
The invention is applicable to the field of lighting, and provides a dipped headlight reflector, a dipped headlight and a motor vehicle; the inner surface of the dipped headlight reflector is provided with a plurality of layers of free curved surfaces, the free curved surfaces are distributed left and right with a light source as the center and lined in a ladder shape, and the width of the free curved surfaces is 3 to 7mm; the datum planes of all the free curved surfaces are paraboloids, and the focus of the paraboloids is 6 to 8mm; and the optical axis of the light source coincides with the axis of the reflector, and light interception boards are arranged in the circumferential direction of a light outlet of the reflector. The embodiment of the invention designs the inner surface of the dipped headlight reflector into the layers of the ladder-shaped free curved surfaces so that the light given out by the light source is radiated and emitted after being reflected by the free curved surfaces, projected in a near distance and a large range, quite scattered and meets the requirements on the light distribution performance of the dipped headlight; and the light given out by the light source is directly emitted or is emitted only after being reflected at one step by the free curved surfaces or the light interception boards, and the light decay is small.
Description
Technical field
The invention belongs to lighting field, relate in particular to a kind of dipped headlamp reflector, dipped headlights and motor vehicle.
Background technology
At present, the light source of car headlamp still is halogen tungsten lamp and high-voltage gas discharging light mainly, and the light fixture anti-seismic performance is not good, and service life is not long, and power consumption is bigger.Comparatively speaking, led light source then has advantages such as energy-conservation, that the life-span long, anti-seismic performance is good.LED is in recent years a focus as the development of car headlamp light source.
After 2004, various LED headlamps are begun in the international automobile exhibition to be put on display, in May, the 2007 little yarn of Japan (Koito) is made institute and successfully the white light LEDs headlamp is installed on the LEXUS LS600h vehicle, and this optical system adopts ellipsoid reflector and lens to form transmission type optical system.German OSRAM had released the led module " OSTAR Headlamp " towards car headlamp in 2007, and this ultra-high brightness LED light source towards car headlamp authenticates by car gage.2008, audi R8 released the first complete LED headlamp in the whole world, its integrated LED dipped headlights, dipped headlights and steering indicating light.
The car headlamp optical system adopts " reflector 11+ lens 12+ cuts tabula rasa 13 " to design luminous intensity distribution mostly at present, as shown in Figure 1.This optical system light decay is more serious, especially uses the lens of rib structure, and light decay is a big problem.In order to satisfy the automobile light distribution requirements, the luminous flux of automobile front requires enough big, generally require greater than 1000lm, if light decay is excessive, original use two LEDs just can satisfy luminous intensity distribution, and will use more than 3, correspondingly, whole system also can increase radiating piece, circuit etc., and cost and technical difficulty also increase.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of dipped headlamp reflector, is intended to solve existing serious, the inefficient problem of dipped headlamp reflector light decay.
The embodiment of the invention is achieved in that a kind of dipped headlamp reflector, and its inner surface has the multilayer free form surface, and described free form surface is to distribute about the center with the light source, and stepped arrangement, and the width of described free form surface is 3～7mm; The datum level of each free curved surface is parabola, and described paraboloidal focal length is 6～8mm; The optical axis of light source overlaps with the axis of described reflector, and being circumferentially with of the light-emitting window of described reflector cuts tabula rasa.
Another purpose of the embodiment of the invention is to provide a kind of dipped headlights, and described dipped headlights comprises: a substrate, be located at the LED of described substrate and be located at the circumferential reflector of described substrate; The inner surface of described reflector has the multilayer free form surface, and described free form surface is to distribute about the center with described LED, and stepped arrangement, and the width of described free form surface is 3～7mm; The datum level of each free curved surface is parabola, and described paraboloidal focal length is 6～8mm; The optical axis of described LED overlaps with the axis of described reflector, and being circumferentially with of the light-emitting window of described reflector cuts tabula rasa.
Another purpose of the embodiment of the invention is to provide a kind of motor vehicle, described motor vehicle comprises: mainly by a substrate, be located at the LED of described substrate and be located at the dipped headlights that the circumferential reflector of described substrate constitutes, the inner surface of described reflector has the multilayer free form surface, described free form surface is to distribute about the center with described LED, and stepped arrangement, the width of described free form surface are 3～7mm; The datum level of each free curved surface is parabola, and described paraboloidal focal length is 6～8mm; The optical axis of described LED overlaps with the axis of described reflector, and being circumferentially with of the light-emitting window of described reflector cuts tabula rasa.
The embodiment of the invention is designed to stepped multilayer free form surface with the inner surface of dipped headlamp reflector, and the light that light source is sent is divergent after the free form surface reflection, and low coverage is throwed on a large scale, and light comparatively disperses, and meets the requirement of dipped headlights luminous intensity distribution performance; The direct outgoing of the light that light source sends or only through free form surface or to cut a tabula rasa primary event be outgoing, light decay is little.
Description of drawings
Fig. 1 is the cutaway view of the dipped headlights that provides of prior art;
Fig. 2 is the perspective view of the dipped headlights that provides of the embodiment of the invention;
Fig. 3 is the index path of the dipped headlights that provides of the embodiment of the invention;
Fig. 4 is the front view of the dipped headlights that provides of the embodiment of the invention;
The vertical view of the dipped headlights that Fig. 5 provides for the embodiment of the invention;
The perspective view of the dipped headlights of the motor vehicle that Fig. 6 provides for the embodiment of the invention;
The schematic diagram of the test position of the dipped headlights of the motor vehicle that Fig. 7 provides for the embodiment of the invention.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In embodiments of the present invention, the inner surface of dipped headlamp reflector is designed to stepped multilayer free form surface, and the light that light source sends is divergent after the free form surface reflection, and light comparatively disperses, meet of the requirement of various occasions, and light decay is less to the dipped headlights luminous intensity distribution performance.
The inner surface of the dipped headlamp reflector that the embodiment of the invention provides has the multilayer free form surface, and described free form surface is to distribute about the center with the light source, and stepped arrangement, and the width of described free form surface is 3～7mm; The datum level of each free curved surface is parabola, and described paraboloidal focal length is 6～8mm; The optical axis of light source overlaps with the axis of described reflector, and being circumferentially with of the light-emitting window of described reflector cuts tabula rasa.
The dipped headlights that the embodiment of the invention provides comprises: a substrate, be located at the LED of described substrate and be located at the circumferential reflector of described substrate; The inner surface of described reflector has the multilayer free form surface, and described free form surface is to distribute about the center with described LED, and stepped arrangement, and the width of described free form surface is 3～7mm; The datum level of each free curved surface is parabola, and described paraboloidal focal length is 6～8mm; The optical axis of described LED overlaps with the axis of described reflector, and being circumferentially with of the light-emitting window of described reflector cuts tabula rasa.
The motor vehicle that the embodiment of the invention provides comprises: mainly by a substrate, be located at the LED of described substrate and be located at the dipped headlights that the circumferential reflector of described substrate constitutes, the inner surface of described reflector has the multilayer free form surface, described free form surface is to distribute about the center with described LED, and stepped arrangement, the width of described free form surface are 3～7mm; The datum level of each free curved surface is parabola, and described paraboloidal focal length is 6～8mm; The optical axis of described LED overlaps with the axis of described reflector, and being circumferentially with of the light-emitting window of described reflector cuts tabula rasa.
Below to be example with LED as light source be elaborated to the specific implementation of the embodiment of the invention:
See also Fig. 2, the dipped headlights that the embodiment of the invention provides comprises a substrate 51, be located at the LED50 of substrate 51 and be located at the circumferential reflector 52 of substrate 51.The inner surface of reflector 52 has multilayer free form surface 21, this multilayer free form surface 21 is based upon on the parabolic datum level and is to distribute about the center with LED50, stepped arrangement, the curvature that is each free curved surface 21 is all approaching with the curvature of the datum level (parabola) of correspondence position, near each free curved surface 21 stepped arranging datum level (parabola).It is each corresponding specific respectively target reflecting area territory of free curved surface 21 that the light that 21 pairs of LED50 different directions of each free curved surface send carries out luminous intensity distribution, and the reflecting effect of each free curved surface 21 stacks up, and makes light spot shape satisfy the requirement of lower beam illumination.
As Fig. 3～shown in Figure 5, the datum level of each free curved surface 21 is same parabola, and paraboloidal focal length is preferably 6～8mm, and correspondingly, the width of free form surface 21 is preferably 3～7mm, and the structure of same paraboloidal free form surface 21 is divided simple relatively.Being circumferentially with of the light-emitting window of reflector 52 cut a tabula rasa 23 in the embodiment of the invention, cuts light restriction that tabula rasa 23 sends LED50 within the specific limits, helps anti-dazzlely, avoids light pollution; For easy to process and anti-dazzle, cut tabula rasa 23 and be made as tabular.
Present embodiment is located at LED50 in the paraboloidal focus, and the optical axis of LED50 is overlapped with the axis of reflector 52.The light that sends of LED50 is divergent after free form surface 21 reflections like this, and low coverage is throwed on a large scale, and light comparatively disperses, and meets the requirement of dipped headlights luminous intensity distribution performance.The inner surface of reflector 52 is subdivided into multilayer free form surface 21 in the present embodiment, and every layer of free form surface 21 all realized accurate luminous intensity distribution, thereby can design the reflector of reduced size, and the dipped headlights size is also little.In addition, LED50 takes direct-injection type to place, the direct outgoing of its light that sends or only through free form surface 21 or to cut tabula rasa 23 primary events be outgoing, light decay is little, the efficient height of dipped headlights.
For improving the projection light intensity, the embodiment of the invention adopts the great power LED with four chips, and these four chips are square arranges, and the luminous angle of great power LED is preferably 100～120 °.For increasing the reflection efficiency of reflector, above-mentioned free form surface 21 takes anodised aluminium to handle.The Transparent Parts of dipped headlights can adopt plate glass, as is located at the plate glass 22 of reflector 52 light-emitting windows, and it does not participate in the luminous intensity distribution design, avoids the light decay that lens causes in the existing design, more helps improving the efficient of dipped headlights.
See also Fig. 6, the headlight of the motor vehicle that the embodiment of the invention provides has two above-mentioned dipped headlights 71.If the power of LED is enough big, above-mentioned headlight also can only have a dipped headlights.Less because of the design size of reflector, help to reduce the size of dipped headlights, thereby itself and high beam or fog lamp can be integrated into a lamp housing.
The embodiment of the invention is chosen two dipped headlights and is carried out simulation test, and wherein the luminous flux of LED is 600 ± 50lm, and half light intensity beam angle is 110 ± 5 degree, and the encapsulation diameter is 7.5 ± 0.5mm; The parabolic focal length of preferred reflector 52 is 7mm, and the width of preferred free form surface 21 is 5mm; Reflector 52 is of a size of 60mm * 80mm * 100mm.The effect that the optical superposition of two dipped headlights, 71 projections is got up satisfies in " GB 4599-2007 lamps for vehicle silk bulb headlamp " requirement to the dipped headlights luminous intensity distribution performance.Through simulation test, every index all meets the requirements, and test data sees following table for details.
| Point, line segment or zone | Horizontal range (mm) | Vertical range (mm) | Standard-required illumination (lx) | Software simulation illumination (lx) | Conclusion |
| ?HV | ??0 | ??0 | ??≤0.7 | ??0.42 | Qualified |
| ?B50L | ??L?1500 | ??U?250 | ??≤0.4 | ??0.3 | Qualified |
| ?75R | ??R?500 | ??D?250 | ??≥12 | ??14.1 | Qualified |
| ?75L | ??L?1500 | ??D?250 | ??≤12 | ??6.5 | Qualified |
| ?50L | ??L?1500 | ??D?375 | ??≤15 | ??8.2 | Qualified |
| Point, line segment or zone | Horizontal range (mm) | Vertical range (mm) | Standard-required illumination (lx) | Software simulation illumination (lx) | Conclusion |
| ?25L | ??L?1500 | ??D?750 | ??≤15 | ??9.1 | Qualified |
| ?50V | ??0 | ??D?375 | ??≥6 | ??10.5 | Qualified |
| ?50R | ??R?750 | ??D?375 | ??≥12 | ??16.2 | Qualified |
| ?25R | ??R?3960 | ??D?750 | ??≥2 | ??6 | Qualified |
| Any point in I district | ??≤2E 50R | ??≤24.3 | Qualified | ||
| Any point in III district | H/H line, or H/H3/H4 line and top | ??≤0.7 | ??≤0.65 | Qualified | |
| Any point in IV district | ??≥3 | ??≥4.6 | Qualified |
Test point 4+5+6=0.15lx+0.52lx+0.31lx 〉=0.6lx is qualified;
0.7lx 〉=test point 7=0.48lx 〉=0.1lx is qualified;
0.7lx 〉=test point 8=0.66lx 〉=0.2lx is qualified;
Annotate: the position in each point, line segment or zone sees also " GB 4599-2007 lamps for vehicle silk bulb headlamp " P.5-6 as shown in Figure 7 in detail in the table.
The embodiment of the invention is designed to stepped multilayer free form surface with the inner surface of dipped headlamp reflector, and the light that light source is sent is divergent after the free form surface reflection, and low coverage is throwed on a large scale, and light comparatively disperses, and meets the requirement of dipped headlights luminous intensity distribution performance; The direct outgoing of the light that light source sends or only through free form surface or to cut a tabula rasa primary event be outgoing, light decay is little.Simultaneously, adopt LED, make dipped headlights energy-conservation, reliable as light source.In addition, avoided the light decay that lens causes in the existing design, helped further to improve the efficient of dipped headlights in the plate glass of the light-emitting window setting of reflector.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a dipped headlamp reflector is characterized in that, the inner surface of described reflector has the multilayer free form surface, and described free form surface is to distribute about the center with the light source, and stepped arrangement, and the width of described free form surface is 3～7mm; The datum level of each free curved surface is parabola, and described paraboloidal focal length is 6～8mm; The optical axis of light source overlaps with the axis of described reflector, and being circumferentially with of the light-emitting window of described reflector cuts tabula rasa.
2. dipped headlamp reflector as claimed in claim 1 is characterized in that, the width of described free form surface is 5mm.
3. dipped headlamp reflector as claimed in claim 1 is characterized in that, described paraboloidal focal length is 7mm.
4. as each described dipped headlamp reflector in the claim 1～3, it is characterized in that described section tabula rasa is tabular.
5. dipped headlights, comprise: a substrate, be located at the LED of described substrate and be located at the circumferential reflector of described substrate, it is characterized in that, the inner surface of described reflector has the multilayer free form surface, described free form surface is to distribute about the center with described LED, and stepped arrangement, the width of described free form surface are 3～7mm; The datum level of each free curved surface is parabola, and described paraboloidal focal length is 6～8mm; The optical axis of described LED overlaps with the axis of described reflector, and being circumferentially with of the light-emitting window of described reflector cuts tabula rasa.
6. dipped headlights as claimed in claim 5 is characterized in that, described LED is the great power LED with four chips, and described four chips are square arranges, and the luminous angle of described great power LED is 100～120 °.
7. dipped headlights as claimed in claim 5 is characterized in that, the width of described free form surface is 5mm; Described paraboloidal focal length is 7mm.
8. dipped headlights as claimed in claim 5 is characterized in that, described section tabula rasa is tabular.
9. motor vehicle, comprise: mainly by a substrate, be located at the LED of described substrate and be located at the dipped headlights that the circumferential reflector of described substrate constitutes, it is characterized in that, the inner surface of described reflector has the multilayer free form surface, described free form surface is to distribute about the center with described LED, and stepped arrangement, the width of described free form surface are 3～7mm; The datum level of each free curved surface is parabola, and described paraboloidal focal length is 6～8mm; The optical axis of described LED overlaps with the axis of described reflector, and being circumferentially with of the light-emitting window of described reflector cuts tabula rasa.
10. motor vehicle as claimed in claim 9 is characterized in that, the width of described free form surface is 5mm; Described paraboloidal focal length is 7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010154650A CN101858563A (en) | 2010-04-16 | 2010-04-16 | Dipped headlight reflector, dipped headlight and motor vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010154650A CN101858563A (en) | 2010-04-16 | 2010-04-16 | Dipped headlight reflector, dipped headlight and motor vehicle |
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| CN101858563A true CN101858563A (en) | 2010-10-13 |
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| CN201010154650A Pending CN101858563A (en) | 2010-04-16 | 2010-04-16 | Dipped headlight reflector, dipped headlight and motor vehicle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392965A (en) * | 2011-11-23 | 2012-03-28 | 广州大学 | LED (light emitting diode) front car lamp |
| CN102486297A (en) * | 2010-12-06 | 2012-06-06 | 海洋王照明科技股份有限公司 | Reflector of front fog lamp, front fog lamp and motor vehicle |
| CN104214675A (en) * | 2013-05-31 | 2014-12-17 | 海洋王（东莞）照明科技有限公司 | Reflector assembly and lamp with reflector assembly |
| CN106439682A (en) * | 2016-09-30 | 2017-02-22 | 武汉通畅汽车电子照明有限公司 | Optical collector for automotive dipped headlight module |
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|---|---|---|---|---|
| US4704661A (en) * | 1986-08-25 | 1987-11-03 | General Electric Company | Faceted reflector for headlamps |
| CN1721758A (en) * | 2004-05-14 | 2006-01-18 | C.R.F.阿西安尼顾问公司 | Module for projecting a light beam |
| JP2006024509A (en) * | 2004-07-09 | 2006-01-26 | Ichikoh Ind Ltd | Vehicular lighting fixture |
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2010
- 2010-04-16 CN CN201010154650A patent/CN101858563A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4704661A (en) * | 1986-08-25 | 1987-11-03 | General Electric Company | Faceted reflector for headlamps |
| CN1721758A (en) * | 2004-05-14 | 2006-01-18 | C.R.F.阿西安尼顾问公司 | Module for projecting a light beam |
| JP2006024509A (en) * | 2004-07-09 | 2006-01-26 | Ichikoh Ind Ltd | Vehicular lighting fixture |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486297A (en) * | 2010-12-06 | 2012-06-06 | 海洋王照明科技股份有限公司 | Reflector of front fog lamp, front fog lamp and motor vehicle |
| CN102486297B (en) * | 2010-12-06 | 2015-03-18 | 海洋王照明科技股份有限公司 | Reflector of front fog lamp, front fog lamp and motor vehicle |
| CN102392965A (en) * | 2011-11-23 | 2012-03-28 | 广州大学 | LED (light emitting diode) front car lamp |
| CN104214675A (en) * | 2013-05-31 | 2014-12-17 | 海洋王（东莞）照明科技有限公司 | Reflector assembly and lamp with reflector assembly |
| CN104214675B (en) * | 2013-05-31 | 2016-05-18 | 海洋王（东莞）照明科技有限公司 | Reflector assembly and apply the light fixture of this reflector assembly |
| CN106439682A (en) * | 2016-09-30 | 2017-02-22 | 武汉通畅汽车电子照明有限公司 | Optical collector for automotive dipped headlight module |
| CN106439682B (en) * | 2016-09-30 | 2018-12-25 | 武汉通畅汽车电子照明有限公司 | A kind of condenser for dipped beam car light mould group |
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Application publication date: 20101013 |