CN101956955A - Headlamp and reflector used for headlamp - Google Patents
Headlamp and reflector used for headlamp Download PDFInfo
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- CN101956955A CN101956955A CN2010105016154A CN201010501615A CN101956955A CN 101956955 A CN101956955 A CN 101956955A CN 2010105016154 A CN2010105016154 A CN 2010105016154A CN 201010501615 A CN201010501615 A CN 201010501615A CN 101956955 A CN101956955 A CN 101956955A
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- reflecting surface
- reflector
- optical axis
- parabola
- car headlamp
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Abstract
The invention relates to a headlamp and a reflector used for the headlamp. The reflector comprises a passing light reflecting surface and a distance light reflecting surface connected with the passing light reflecting surface, wherein the passing light reflecting surface comprises a plurality of vertical stripe-shaped free form surfaces; the distance light reflecting surface is a paraboloid formed by a parabola rotating around an optical axis; and in a coordinate system that the optical axis is used as an X axis and a line penetrating through the center of the reflector and vertical to the optical axis is used as a Y axis, the equation of the parabola is that y2=ax, wherein a is not less than 96.2 and is not more than 98.2. Compared with the design of traditional multi-layer free form surfaces which are divided explicitly, the distance light reflecting surface of the reflector avoids light loss caused by over many form surfaces and the transition among the form surfaces, and improves the illumination.
Description
[technical field]
The present invention relates to a kind of light fixture, the reflector that particularly relates to a kind of car headlamp and be used for this car headlamp.
[background technology]
Traditional car headlamp, for example the car headlamp of H4 type generally comprises reflector and the bulb of being located at this reflector center.Have two filaments in this bulb, be respectively applied for lower beam illumination and far lighting.This reflector adopts the design of multilayer free form surface, and its first half is mainly used in the dipped beam luminous intensity distribution, and distance light is then got by the reflection of entire emission device.But when lighting headlight high beam filament, its light light after the reflection of the reflector of upper part is too dispersed, and the free form surface of its each fritter of the first half gets meticulously, causes distance light to converge inadequately, and illumination does not reach the requirement of car light standard.
[summary of the invention]
Based on this, be necessary to provide a kind of convergence effect reflector and use the car headlamp of this reflector preferably.
A kind of reflector that is used for car headlamp comprises dipped beam reflecting surface and the distance light reflecting surface that links to each other with the dipped beam reflecting surface.The dipped beam reflecting surface comprises a plurality of free form surfaces of vertical stripe shape.To be a parabola rotate the parabola that forms around optical axis to the distance light reflecting surface, is in the coordinate system of Y-axis at the line that is X-axis with the optical axis, passes reflector center and vertical optical axis, and this parabolical equation is: y
2=ax, wherein, 96.2≤a≤98.2.
Preferably, a=97.2.
Preferably, this parabola is 144～146 degree around the angle of this optical axis rotation.
Preferably, this parabola is 145 degree around the angle of this optical axis rotation.
A kind of car headlamp comprises reflector and the light source with optical axis of being located at the reflector center.Reflector comprises dipped beam reflecting surface and the distance light reflecting surface that links to each other with the dipped beam reflecting surface.The dipped beam reflecting surface comprises a plurality of free form surfaces of vertical stripe shape.The distance light reflecting surface is that a parabola rotates the parabola that forms around optical axis.At the line that is X-axis with the optical axis, passes reflector center and vertical optical axis is in the coordinate system of Y-axis, and this parabolical equation is: y
2=ax, wherein, 96.2≤a≤98.2.
Preferably, a=97.2.
Preferably, this parabola is 144～146 degree around the angle of this optical axis rotation.
Preferably, this parabola is 145 degree around the angle of this optical axis rotation.
Preferably, this light source comprises dip filament and the headlight high beam filament adjacent with this dip filament, and this headlight high beam filament is positioned at this parabolic focus place.
The distance light reflecting surface of the reflector of above-mentioned car headlamp and traditional employing are got very thin multilayer free form surface design and are compared, and have avoided the light loss that causes owing to too much curved surface and the transition between the curved surface, and convergence effect is better, has improved illumination.
[description of drawings]
Fig. 1 is the schematic perspective view of the car headlamp of an embodiment;
Fig. 2 is the front view of car headlamp shown in Figure 1;
Fig. 3 is the cutaway view along III-III line among Fig. 1;
Fig. 4 and Fig. 5 are the test condition schematic diagram.
[specific embodiment]
Below in conjunction with drawings and Examples car headlamp is described in further detail.
See also Fig. 1, the car headlamp 100 of an embodiment comprises reflector 10 and light source 20.Reflector 10 is roughly bowl-type, and light source 20 is located at the center of reflector 10.Light source 20 is based on halogen bulb of H4 type, and it has optical axis 21.
Please consult Fig. 2 and Fig. 3 simultaneously, reflector 10 has reflecting surface, and it comprises dipped beam reflecting surface 11 that roughly is positioned at its first half and the distance light reflecting surface 13 that roughly is positioned at the latter half that links to each other with dipped beam reflecting surface 11.
Be formed with a plurality of free form surfaces 111 of the vertical stripe shape that is divided into the waveform cross section on the dipped beam reflecting surface 11.
Distance light reflecting surface 13 is parabolic, is a parabola 131 around optical axis 21 formation that rotates to an angle.Be X-axis with optical axis 21, passing the center of reflector 10 and be in the coordinate system of Y-axis that the equation of this parabola 131 is: y perpendicular to the line of optical axis 21
2=ax.Wherein, 96.2≤a≤98.2, preferred a=97.2.
Parabola 131 is 144～146 degree around the angle of optical axis 21 rotations.In the present embodiment, distance light reflecting surface 13 is formed around optical axis 21 rotations 145 degree backs by parabola 131.Specifically, distance light reflecting surface 13 is to be rotated counterclockwise 65 degree by parabola 131 around optical axis 21 to rotate after 80s formation with positive hour hands.
Light source 20 comprises dip filament 23 and the headlight high beam filament 25 adjacent with dip filament 23.During use, dip filament 23 is positioned at the focus place of dipped beam reflecting surface 11, and headlight high beam filament 25 is positioned at the focus place of parabola 131.
The distance light reflecting surface 13 of the car headlamp 100 of present embodiment and traditional employing are got very thin multilayer free form surface design and are compared, and have avoided the light loss that causes owing to too much face piece and the transition between the face piece, have improved illumination.
In addition, the size of above-mentioned reflector 10 can be littler than traditional reflector, and for example the opening diameter of reflector 10 can be contracted to 125mm, and the degree of depth can be reduced into 47mm.
Result of use for the car headlamp 100 of verifying present embodiment, the applicant is according to carrying out actual measurement to the requirement of dipped beam, high beam luminous intensity distribution performance to it in " GB4599-2007 lamps for vehicle silk bulb headlamp ", and the brightness value in each test point, line segment or zone sees the following form.Each illumination that need detect target all satisfies the requirement of GB 4599-2007.
(1) dipped beam:
Test point 4+5+6=0.35lx+0.55lx+0.45lx 〉=1.35lx is qualified;
0.7lx 〉=test point 7=0.43 〉=0.1lx is qualified;
0.7lx 〉=test point 8=0.56 〉=0.2lx is qualified.
(2) distance light:
| Test point or zone | Standard-required brightness value (1x) | Illuminations actually measured value (1x) | Conclusion |
| Emax | 〉=48 and≤240 | 61 | Qualified |
| HV | ≥0.8Emax | 58 | Qualified |
| The HV point is to 1125L and R | ≥24 | L≥28.2，R≥31.1 | Qualified |
| The HV point is to 2250L and R | ≥6 | L≥8.9，R≥11.3 | Qualified |
Annotate: the position of each point sees also " GB 4599-2007 lamps for vehicle silk bulb headlamp " P.5-6 as shown in the figure in detail in the table.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (9)
1. reflector that is used for car headlamp, comprise dipped beam reflecting surface and the distance light reflecting surface that links to each other with this dipped beam reflecting surface, it is characterized in that: this dipped beam reflecting surface comprises a plurality of free form surfaces of vertical stripe shape, this distance light reflecting surface is the parabola that a parabola forms around this optical axis rotation, be X-axis with this optical axis, pass this reflector center and vertically the line of this optical axis be in the coordinate system of Y-axis, this parabolical equation is: y
2=ax, wherein, 96.2≤a≤98.2.
2. the reflector that is used for car headlamp as claimed in claim 1 is characterized in that: a=97.2.
3. the reflector that is used for car headlamp as claimed in claim 1 is characterized in that: this parabola is 144～146 degree around the angle of this optical axis rotation.
4. the reflector that is used for car headlamp as claimed in claim 1 is characterized in that: this parabola is 145 degree around the angle of this optical axis rotation.
5. car headlamp, comprise reflector and the light source of being located at this reflector center with optical axis, it is characterized in that: this reflector comprises dipped beam reflecting surface and the distance light reflecting surface that links to each other with this dipped beam reflecting surface, this dipped beam reflecting surface comprises a plurality of free form surfaces of vertical stripe shape, this distance light reflecting surface is the parabola that a parabola forms around this optical axis rotation, be X-axis with this optical axis, pass this reflector center and vertically the line of this optical axis be in the coordinate system of Y-axis, this parabolical equation is: y
2=ax, wherein, 96.2≤a≤98.2.
6. car headlamp as claimed in claim 5 is characterized in that: a=97.2.
7. car headlamp as claimed in claim 5 is characterized in that: this parabola is 144～146 degree around the angle of this optical axis rotation.
8. car headlamp as claimed in claim 5 is characterized in that: this parabola is 145 degree around the angle of this optical axis rotation.
9. car headlamp as claimed in claim 5 is characterized in that: this light source comprises dip filament and the headlight high beam filament adjacent with this dip filament, and this headlight high beam filament is positioned at this parabolic focus place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010501615.4A CN101956955B (en) | 2010-09-30 | 2010-09-30 | Headlamp and reflector used for headlamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010501615.4A CN101956955B (en) | 2010-09-30 | 2010-09-30 | Headlamp and reflector used for headlamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101956955A true CN101956955A (en) | 2011-01-26 |
| CN101956955B CN101956955B (en) | 2014-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010501615.4A Active CN101956955B (en) | 2010-09-30 | 2010-09-30 | Headlamp and reflector used for headlamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048243A (en) * | 2014-06-30 | 2014-09-17 | 昆山博文照明科技有限公司 | Motor vehicle headlamp |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5725298A (en) * | 1996-02-23 | 1998-03-10 | Hella Kg Hueck & Co. | Vehicular headlight providing high-beam and depressed-beam illumination, and light source therefor |
| EP1077347A2 (en) * | 1999-08-16 | 2001-02-21 | Zizala Lichtsysteme GmbH | Vehicle headlamp |
| CN1502500A (en) * | 2002-11-25 | 2004-06-09 | 本田技研工业株式会社 | Front lamp for vehicle |
| CN101793372A (en) * | 2009-01-30 | 2010-08-04 | 市光工业株式会社 | Vehicle headlamp |
-
2010
- 2010-09-30 CN CN201010501615.4A patent/CN101956955B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5725298A (en) * | 1996-02-23 | 1998-03-10 | Hella Kg Hueck & Co. | Vehicular headlight providing high-beam and depressed-beam illumination, and light source therefor |
| EP1077347A2 (en) * | 1999-08-16 | 2001-02-21 | Zizala Lichtsysteme GmbH | Vehicle headlamp |
| CN1502500A (en) * | 2002-11-25 | 2004-06-09 | 本田技研工业株式会社 | Front lamp for vehicle |
| CN101793372A (en) * | 2009-01-30 | 2010-08-04 | 市光工业株式会社 | Vehicle headlamp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048243A (en) * | 2014-06-30 | 2014-09-17 | 昆山博文照明科技有限公司 | Motor vehicle headlamp |
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| Publication number | Publication date |
|---|---|
| CN101956955B (en) | 2014-02-19 |
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