EP1126211A2 - Projektionsscheinwerfer für ein Kraftfahrzeug - Google Patents
Projektionsscheinwerfer für ein Kraftfahrzeug Download PDFInfo
- Publication number
- EP1126211A2 EP1126211A2 EP20010102762 EP01102762A EP1126211A2 EP 1126211 A2 EP1126211 A2 EP 1126211A2 EP 20010102762 EP20010102762 EP 20010102762 EP 01102762 A EP01102762 A EP 01102762A EP 1126211 A2 EP1126211 A2 EP 1126211A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- light
- light source
- headlight
- main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
-
- 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
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/36—Combinations of two or more separate reflectors
- F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
-
- 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
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/20—Illuminance distribution within the emitted light
Definitions
- the invention relates to a projection headlight for motor vehicles with a light source, a main reflector and a lens, with an optical through the main reflector Axis of the projection headlight is defined.
- a low beam headlight which has a parabolic reflector with an optical axis and a focal point, one on the optical axis and something light source arranged in front of the focal point and a limiting device, wherein the limiting device is a part of the emerged from the light source and for Beams of light migrating towards the reflector can intercept in order to that of the reflector backbeams of light to generate a cut boundary.
- the reflector is with this State of the art from two paraboloid sections of the same focus composed, which extend to the left or right of the optical axis, and the Paraboloid section that is arranged on the side when viewed from the front of the reflector that corresponds to the street side to be driven according to the regulations has a larger one Focal length than the other paraboloid section.
- DE 197 15 693 discloses a vehicle lamp with a projector beam headlight, in which the projector beam headlight has a light source, a lens and a reflector which is configured to forward light through the lens to produce a Reflecting the beam.
- the headlight also includes a shield, which in the Light path between the reflector and the lens is arranged and an uneven Has working edge.
- the object of the present invention is to improve the radiation characteristics of the known Projection headlights for motor vehicles improve and at the same time her Make appearance more pleasing.
- the lamp housing compared to arranged a first reflector a second reflector.
- the second reflector acts as "Back reflector” that transmits part of the light emitted by the light source at first "Main reflector” throws back.
- the light cone from the light source is at its edge limited.
- the main reflector By the first reflection of the light on the cone edge by the back reflector the main reflector and the subsequent second reflection of the light by the The main reflector extends the light cone of the light source to the side. This is the Emission characteristics no longer so “glaring”, and the appearance of the Projection headlights according to the invention is “softer” compared to headlights According to the state of the art.
- the projection headlight for a motor vehicle with a Light source, a main reflector and a lens, being through the main reflector an optical axis is defined, characterized by a back reflector which is between the light source and the lens of the headlamp is arranged and one to the optical axis of the main reflector is essentially symmetrical Has light passage opening.
- the back reflector can with respect to the optical axis of the main reflector be inclined to meet different requirements in terms of shaping the Light beam can be adjusted for left and right headlights.
- the light passage opening of the rear reflector can be a circular one have an elliptical or a substantially square shape.
- the special form of Light passage opening (elliptical or square or rectangular) can in particular be selected depending on the shape of the main reflector, so that the The main light cone of the headlamp corresponds to the design of the lens.
- an optical element for shaping of the main light beam can be included in the light passage opening of the rear reflector.
- the shape of the reflector surface of the back reflector can - viewed from the light source - be convex or concave. In this way, the light coming from the light source can pass through the back reflector is bundled in a ring to reflect the main reflector (concave) or be further scattered (convex). In the first case you get a gradation in the Intensity distribution of the headlight, in the second case there is an approximately stepless, uniform decrease in light intensity from the optical axis to the outside in Cone of light.
- Fig. 1 shows a headlamp with an embodiment of the invention Cross-section of the rear reflector.
- Fig. 2 shows an embodiment of the rear reflector according to the invention in plan view.
- the projection headlight for a motor vehicle shown in FIG. 1 comprises a light source 1, which is positioned in a main reflector 2.
- the main reflector 2 is preferred parabolic, and the light source 1 is parabolic at a focal point of the main reflector arranged.
- the headlight is closed by a lens 3 to the front, so that the light source 1 and further elements of the headlight, not considered here, are in front (Mechanical) external influences are protected.
- An optical axis 5 of the headlight is defined by the main reflector 2 on which the light source 1 is arranged.
- the shape of the light cone of the headlight will essentially determined by the shape of the main reflector 2. Thereby form in the predominant number of headlights the light source 1 and a central section 4 of the
- the main reflector is a luminaire module that is installed as a unit in the headlamp can.
- the light module often includes lenses or other elements optical elements in front of the light source 1 for beam shaping of the light cone. Such a thing optical element is designated by 9 in FIG. 1.
- the installation of the complete light module in the headlight has in particular Advantage that complex adjustment work in the arrangement of the light source 1 in the Main reflector 2 is omitted.
- the light module is simply fixed in the vehicle built-in outer portion 10 of the main reflector 2 used.
- the orientation of the Luminaire module with respect to this outer section 10 is not as critical as that Alignment of the light source 1 with respect to sections of the beam-shaping section closer to the axis Main reflector.
- a back reflector 6 between the light source 1 and the lens 3 of the headlight arranged.
- This back reflector 6 assigns one the optical axis 5 of the main reflector 2 is essentially centrally symmetrical Light passage opening 8 so that a portion of the light from the light source near the axis 1 emerges freely from the headlight through the rear reflector. Only the share of Light emitted from the light source at an angle greater than one is a predetermined reference angle, is reflected by the back reflector 6.
- FIG. 1 Rays 11 and 12 are shown, the beam 12 being selected so that it is characterized by the Back reflector 6 is influenced, while as another beam 11 an unaffected Beam was chosen.
- the back reflector 6 according to the invention is preferably over Bracket elements 7 on the lamp module in the amount of the (optional) optical element 9 attached.
- the uninfluenced beam 11 emerges from the light source 1, reaches the Light passage opening 8 of the rear reflector and the optical element 9 therein, which for Beam shaping is used. It is there (as in the prior art) by the optical element 9 in distracted from a desired direction.
- the angle between the beam 11 and the optical axis 5 never exceeds a predetermined value.
- the beam 12 leaves the light source 1 at an angle that is greater than the predetermined one
- the value is: in contrast to beam 11, beam 12 is not a beam close to the axis.
- the ray 12 therefore strikes the back reflector 6 according to the invention, from which it is "thrown back", i.e. through which he at a direct exit through the lens 3 from the headlight is prevented.
- the beam 12 is reflected by the back reflector 6, it reaches the outer section 10 of the main reflector 2 offset laterally Direction changed one more time so that it now passes the back reflector through the Lens 3 leaves the headlight.
- Fig. 2 shows a very simple shape of the rear reflector 6 with Light passage opening 8 in plan view, i.e. seen in the direction of the optical axis. In the shown embodiment of the rear reflector 6 is this and the contained therein Circular light opening. This results in a value as the solid angle that proportional to the square of the ratio of the radius of the light passage opening 8 and Distance between light source 1 and back reflector 6 is.
- the choice of the shape of the Light passage opening 8 of the rear reflector 6 depends essentially on the requirements in terms of the design of the headlamp. Therefore, the light passage opening 8 in Generally more of an elliptical, rectangular or square shape and thus result in a different solid angle.
- the back reflector 6 with respect to the optical axis 5 of the Main reflector 2 be inclined so that it is "parallel" to the course of the lens 3 stands.
- the rear reflector in the right headlight of the vehicle can be in With respect to the vehicle, run diagonally forward from the outside.
- the position of the rear reflector 6 is of course decisive for the above-mentioned effective Area of the light passage opening 8 and thus for the effective solid angle of the Rear reflector 6.
- the back reflector 6 has a convex reflector surface when the Back reflector 6 viewed from the light source 1. This has the same with respect to the Beam 12 result in the described beam path. In another, not shown preferred embodiment of the invention, however, the back reflector 6 has a concave reflector surface.
- the two different forms of the reflector surface cause different patterns in the beam cone of the headlight with the back reflector according to the invention 6. While the convex reflector surface of the Light source coming light is further dispersed by the back reflector 6, it will at concave reflector surface bundled in a ring. With the convex back reflector 6 one obtains such an approximately stepless, uniform decrease in light intensity from the optical one Axis outwards in the light cone.
- the concave reflector surface leads to a Gradation in the intensity distribution of the headlight, there is a ring graduated intensity distribution in the beam cone.
- the radiation pattern is in both cases the headlight is no longer so “bright” and the appearance of the invention Projection headlights "softer” compared to headlights according to the state of the Technology.
- the width of the back reflector 6 is preferably chosen so that when looking at the Headlights in the headlights the built-in mounting elements 7 e.g. for the optical Element 9 or for the back reflector 6 are covered by the back reflector 6 and so a more homogeneous appearance of the headlamp is achieved.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
- 1
- Lichtquelle
- 2
- Hauptreflektor
- 3
- Lichtscheibe
- 4
- Zentralabschnitt des Hauptreflektors
- 5
- optische Achse
- 6
- Rückreflektor
- 7
- Halterungselement für Rückreflektor
- 8
- Lichtdurchtrittsöffnung in Rückreflektor
- 9
- optisches Element in Lichtdurchtrittsöffnung in Rückreflektor
- 10
- Seitenabschnitt des Hauptreflektors
- 11
- erster (achsennaher) Strahl
- 12
- zweiter (mehrfach reflektierter) Strahl
Claims (6)
- Projektionsscheinwerfer für ein Kraftfahrzeug mit einer Lichtquelle (1), einem Hauptreflektor (2) und einer Lichtscheibe (3), wobei durch den Hauptreflektor (2) eine optische Achse (5) definiert wird,
gekennzeichnet durch
einen Rückreflektor (6), der zwischen der Lichtquelle (1) und der Lichtscheibe (3) des Scheinwerfers angeordnet ist und eine zu der optischen Achse (5) des Hauptreflektors (2) im wesentlichen zentralsymmetrische Lichtdurchtrittsöffnung (8) aufweist. - Scheinwerfer nach Anspruch 1,
dadurch gekennzeichnet, dass
der Rückreflektor (6) in Bezug auf die optische Achse (5) des Hauptreflektors (2) schräg gestellt ist. - Scheinwerfer nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass
die Lichtdurchtrittsöffnung (8) des Rückreflektors (6) im wesentlichen quadratisch ist. - Scheinwerfer nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass
in der Lichtdurchtrittsöffnung (8) des Rückreflektors (6) ein optisches Element (9) zur Formung des Hauptlichtstrahls vorgesehen ist. - Scheinwerfer nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass
der Rückreflektor (6) eine konvexe Reflektorfläche aufweist. - Scheinwerfer nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass
der Rückreflektor (6) eine konkave Reflektorfläche aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10007403 | 2000-02-18 | ||
DE2000107403 DE10007403A1 (de) | 2000-02-18 | 2000-02-18 | Projektionsscheinwerfer für ein Kraftfahrzeug |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1126211A2 true EP1126211A2 (de) | 2001-08-22 |
EP1126211A3 EP1126211A3 (de) | 2004-01-14 |
EP1126211B1 EP1126211B1 (de) | 2006-03-29 |
Family
ID=7631409
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20010102762 Expired - Lifetime EP1126211B1 (de) | 2000-02-18 | 2001-02-08 | Projektionsscheinwerfer für ein Kraftfahrzeug |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1126211B1 (de) |
AT (1) | ATE321974T1 (de) |
DE (2) | DE10007403A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005015079A1 (de) * | 2003-08-12 | 2005-02-17 | Hella Kgaa Hueck & Co | Abblendscheinwerfer mit ringförmigem erscheinungsbild |
WO2009112204A2 (de) * | 2008-03-14 | 2009-09-17 | OBE OHNMACHT & BAUMGäRTNER GMBH & CO. KG | Vorrichtung und verfahren zur diffusen ausleuchtung eines linienförmigen bereichs |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1701095B1 (de) * | 2005-02-07 | 2012-01-18 | Siemens Aktiengesellschaft | Hitzeschild |
DE102011108383A1 (de) * | 2011-07-22 | 2013-01-24 | Udo Beewen | Vorrichtung zum Ausleuchten einer Straße |
DE102016203403A1 (de) | 2016-03-02 | 2017-09-07 | Volkswagen Aktiengesellschaft | Verfahren zum Betreiben einer Kraftfahrzeug-Beleuchtungseinrichtung |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3225609A1 (de) | 1981-07-10 | 1983-02-03 | Cibie Projecteurs S.A., 93012 Bobigny | Abblendscheinwerfer |
DE19715693A1 (de) | 1996-04-20 | 1997-11-06 | Rover Group | Leuchte für ein Fahrzeug |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1883360A (en) * | 1929-01-29 | 1932-10-18 | American Safety Headlight Corp | Headlight |
US3796886A (en) * | 1973-05-18 | 1974-03-12 | Ervin J | Radiant energy reflectors |
US4037096A (en) * | 1974-08-09 | 1977-07-19 | American Sterilizer Company | Illuminator apparatus using optical reflective methods |
FR2591968B1 (fr) * | 1985-12-24 | 1988-04-01 | Cibie Projecteurs | Feu de signalisation a eclairement colore pour vehicule automobile |
DE4224865A1 (de) * | 1992-07-28 | 1994-02-03 | Bayerische Motoren Werke Ag | Kraftfahrzeug-Scheinwerfer |
DE29519938U1 (de) * | 1995-12-15 | 1996-02-15 | Zizala Lichtsysteme Gmbh | Doppelreflektorscheinwerfer |
-
2000
- 2000-02-18 DE DE2000107403 patent/DE10007403A1/de not_active Withdrawn
-
2001
- 2001-02-08 EP EP20010102762 patent/EP1126211B1/de not_active Expired - Lifetime
- 2001-02-08 AT AT01102762T patent/ATE321974T1/de not_active IP Right Cessation
- 2001-02-08 DE DE50109342T patent/DE50109342D1/de not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3225609A1 (de) | 1981-07-10 | 1983-02-03 | Cibie Projecteurs S.A., 93012 Bobigny | Abblendscheinwerfer |
DE19715693A1 (de) | 1996-04-20 | 1997-11-06 | Rover Group | Leuchte für ein Fahrzeug |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005015079A1 (de) * | 2003-08-12 | 2005-02-17 | Hella Kgaa Hueck & Co | Abblendscheinwerfer mit ringförmigem erscheinungsbild |
WO2009112204A2 (de) * | 2008-03-14 | 2009-09-17 | OBE OHNMACHT & BAUMGäRTNER GMBH & CO. KG | Vorrichtung und verfahren zur diffusen ausleuchtung eines linienförmigen bereichs |
WO2009112204A3 (de) * | 2008-03-14 | 2010-06-03 | OBE OHNMACHT & BAUMGäRTNER GMBH & CO. KG | Vorrichtung und verfahren zur diffusen ausleuchtung eines linienförmigen bereichs |
Also Published As
Publication number | Publication date |
---|---|
DE50109342D1 (de) | 2006-05-18 |
DE10007403A1 (de) | 2001-08-23 |
EP1126211B1 (de) | 2006-03-29 |
ATE321974T1 (de) | 2006-04-15 |
EP1126211A3 (de) | 2004-01-14 |
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