EP1912018A1 - Projection headlamp for vehicles - Google Patents
Projection headlamp for vehicles Download PDFInfo
- Publication number
- EP1912018A1 EP1912018A1 EP07115620A EP07115620A EP1912018A1 EP 1912018 A1 EP1912018 A1 EP 1912018A1 EP 07115620 A EP07115620 A EP 07115620A EP 07115620 A EP07115620 A EP 07115620A EP 1912018 A1 EP1912018 A1 EP 1912018A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- projection
- diaphragm
- light
- light source
- 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
- 230000003287 optical effect Effects 0.000 claims abstract description 40
- 238000009826 distribution Methods 0.000 claims abstract description 19
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 241000234435 Lilium Species 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/151—Light emitting diodes [LED] arranged in one or more lines
-
- 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
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
- F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
-
- 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
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
- F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/10—Combinations of only two kinds of elements the elements being reflectors and screens
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the invention relates to a projection headlight for vehicles having a first projection light unit for generating a first light distribution and having a second projection light unit for generating a second light distribution, which have a common lens located in the light exit direction, the first projection light unit having a first reflector device, one of the first reflector device associated a first light source device and a first diaphragm arranged between the first reflector device of the lens and a second reflector device, a second light source device associated with the second reflector device and a second diaphragm arranged between the second reflector device and the lens, the first reflector device and the second reflector means em from the first light source means and the second light source means collected light near a rear focal point of the lens.
- a projection headlight for vehicles which has a first projection light unit for generating a first light distribution and a second projection light unit for generating a second light distribution.
- the first projection light unit has a first reflector device and a first light source device;
- the second projection light unit has a second reflector device and a second light source device.
- These devices of the first projection light unit and the second projection light unit are optically separated from each other.
- the first reflector device and the first light source device and the second reflector device and the second light source device cooperate with an upstream diaphragm and a shared lens according to the projection principle so that different light distributions associated with the projection light units can be generated.
- the first light source device and the second light source device are each arranged in a region close to an optical axis of the lens.
- the main emission direction of the first light source device and the second light source device is perpendicular to the optical axis in the opposite direction outward in the direction of the respectively associated first reflector means and second reflector means.
- the first light source device and the second light source device are each arranged on a carrier which runs along the optical axis of the lens.
- a disadvantage of the known projection headlight is that a plurality of such first projection light units or second projection light units is required to produce a predetermined illuminance for a light function.
- Object of the present invention is to develop a projection headlamp for vehicles such that the number of projection light units can be reduced to produce a predetermined light function, so that the projection headlight is constructed to save space.
- the invention in conjunction with the preamble of claim 1, characterized in that the first reflector means extends at least in a region between an extension plane of the first light source means and the optical axis of the lens on the one hand and that the second reflector means at least in one Area between the plane of extension of the second light source means and the optical axis of the lens on the other hand extends.
- the particular advantage of the invention is that a light source device with more than one light source can be assigned to a projection light unit of the projection headlamp so that the number of projection light units that can be used to generate the predetermined light distributions can be reduced to save space.
- a first light source device and / or a light source device is arranged at a relatively large distance from an optical axis, an improved dissipation of the resulting during operation of the light source means heat to a rear heat sink can be ensured.
- the light source carriers may be solid without reducing the optically effective areas of the projection light units. This results in an improved thermal connection of the light source devices, which make it possible in that the light source device can have a plurality of light sources for increasing the illuminance.
- a center axis of the first reflector device and a center axis of the second reflector device form an opening angle of at least 30 °, preferably 45 °. In this way, a maximum light output is ensured since the light reflected by the respectively associated reflector devices is reflected unimpeded in the direction of the lens.
- the first reflector device is formed of a first reflector and the second reflector device of a second reflector, each having a longitudinal portion which approach asymptotically in the light exit direction to the optical axis.
- the longitudinal sections of the reflectors can converge to form a diaphragm tip, which is a component of the first diaphragm of the first projection light unit and a component of a second diaphragm of the second projection light unit.
- the aperture can be integrated in the reflector.
- a diaphragm associated with a reflector is designed as an inclined surface, which is designed to increase in the direction of an apex region of the reflector with respect to an optical axis.
- the inclined surface is connected via a curved boundary line with the reflector.
- the embodiment according to the invention has an optimization of the light distribution in terms of range, ride comfort and safety. Further, aberrations of the projection lens can be suppressed and a tolerance sensitivity in the production of the headlamp can be reduced. This is effected in particular by the diaphragm edge formed according to the invention.
- a projection headlamp 1 which consists of a first projection light unit 2 for generating a low beam distribution and a second projection light unit 3 for generating a high beam distribution.
- the first projection light unit 2 is arranged substantially in relation to a horizontal plane symmetrical to the second projection light unit 3.
- the first projection light unit 2 has a first light source device 4, a first reflector device 5 and a first diaphragm 6.
- the second projection light unit 3 has a second light source device 7, a second reflector device 8 and a second diaphragm 9.
- the first projection light unit 2 and the second projection light unit 3 each operate on the projection principle, with the first reflector device 5 and the second reflector device 8 respectively emitting the light beams 10 emitted by the first light source device 4 and the light beams 11 emitted by the second light source device 7 of a rear focal point F of a lens 12 shared by the first projection light unit 2 and the second projection light unit 3.
- the lens 12 is arranged in the light exit direction 13 of the projection headlamp 1 in front of the first reflector device 5 and the second reflector device 8 or the first diaphragm 6 and the second diaphragm 9.
- the first light source device 4 preferably has a plurality of light sources 4 'designed as light emitting diodes (LED), of which only one is shown by way of example in FIG. 1 or FIG. 2.
- the second light source device 7 preferably has a plurality of light-emitting diodes (LED) designed as light sources 7 '.
- the light sources 4 'of the first light source device 4 and the light sources 7' of the second light source device 7 are each arranged on a light source carrier, not shown, which is arranged in the transverse direction outside an imaginary parallel to the optical axis 14 extending extension line of the lens 12.
- a massive heat sink which in particular can dissipate the heat generated by the plurality of first light sources 4 ', can be connected to the light source carrier in the rearward direction of the projection headlight.
- a distance A between an extension plane G and G 'of the first light source device 4 and the second light source device 7 to the optical axis 14 of the lens 12 is greater than the transverse extent of the first reflector means 5 and / or
- the transverse extent of the second reflector device 8 is understood as meaning the transverse extent of the first reflector device 5 or the second reflector device 8, the extent of the reflector devices 5 and 8 extending transversely to the optical axis 14 of the lens 12.
- the first reflector device 5 extends in a region between the plane of extent G of the first light source device 4 and the optical axis 14 of the lens 12.
- the second reflector device 8 extends between the plane of extent G 'of the second light source device 7 and the optical axis 14 of the lens 12.
- the first reflector device 5 and the second reflector device 8 are arranged substantially between the first light source device 4 and the second light source device 7.
- a center axis M of the first reflector device 5 and a center axis M 'of the second reflector device 8 form an opening angle W of at least 10 °, preferably 25 °.
- the center axes M, M 'of the first reflector device 5 and the second reflector device 8 intersect at the focal point F.
- the first reflector device 5 has an ellipsoidal first reflector 5 '.
- the second reflector device 8 has an ellipsoidal second reflector 8 '.
- the first reflector 5 ' extends substantially mirror-inverted to the second reflector 8' above the optical axis 14, while the second reflector 8 'is arranged below the optical axis 14.
- the first reflector 5 ' has a longitudinal section 15 which approaches the optical axis 14 in the light exit direction 13.
- the second reflector 8 ' has a longitudinal section 16 which approaches the optical axis 14 in the light exit direction 13.
- a front end of the longitudinal section 15 of the first reflector 5 ' forms the first diaphragm 6 of the first projection light unit 2 for generating a cut-off for the low-beam light distribution.
- a front end of the longitudinal section 16 of the second reflector 8 ' forms the second diaphragm 9 of the second projection light unit 3.
- the reflectors 5', 8 'thus also form the diaphragms for the projection light units 2, 3.
- the longitudinal sections 15, 16 to a diaphragm tip 17, which serves to image the cut-off for the low-beam light distribution.
- the ends of the longitudinal sections 15, 16 of the first reflector 5 'or of the reflector 8' can also be arranged offset to one another in the light exit direction 13.
- the first reflector 5 'and the second reflector 8' each have a longitudinal portion 18 and 19, which converge at a distance S to the diaphragm tip 17.
- the first light source device 4 and the second light source device 7 are arranged such that the main emission direction thereof is perpendicular to the optical axis 14 and to the optical axis 14.
- the light source devices 4 and 7 are arranged opposite to the optical axis 14.
- the first reflector device 5 and the second reflector device 8 extend in a lily shape in cross-section, wherein the outer surface of the lily shape is provided with a specular reflection surface.
- the projection headlamp has a first reflector device 100 arranged above the optical axis 14 and associated with two light sources 7 '(light-emitting diodes) for generating a low-beam light distribution.
- the upper reflector device 100 has two adjacently arranged reflectors 105, 105 ', to each of which a light source 7' is assigned.
- a second reflector device 101 is arranged, which is associated with a further light source 7 '(light emitting diode) for generating a high beam distribution.
- the second reflector device 101 has a single reflector 108 to which the light-emitting diode 7 'is assigned.
- the light emitting diodes 7 ' are - as in the previous embodiments - each on a side facing away from the optical axis 14 of the reflectors 105, 105' and the reflector 108 is arranged.
- the first reflector device 100 and the second reflector device 101 are integrally connected to one another, wherein a arranged on a mutually facing side first aperture 106 of the first reflectors 105, 105 'with a second aperture 109 of the second reflector 108 converge to a common aperture edge 117.
- the first reflector device 100 and the second reflector device 101 may also be arranged physically separated from one another.
- the first diaphragm 106 and the second diaphragm 109 each extend as an inclined surface to form an acute angle with respect to a horizontal plane E, in which the optical axis 14 extends.
- the distance B of the first diaphragm 106 to the second diaphragm 109 increases in the direction of the vertex region of the reflector devices 100, 101, as can be seen from FIG.
- the first diaphragm 106 and the second diaphragm 109 pass over a curved boundary line 120 or 121 into the first reflector 105, 105 'and the second reflector 108, respectively.
- the first diaphragm 106 and / or the second diaphragm 109 can also pass continuously into the first reflector 105, 105 'or the second reflector 108.
- the oblique surfaces of the first panel 106 and the second panel 109 are uneven and have at least one curved surface.
- the curvature surface may, for example, be formed as a curved subarea 126, 127 with at least one curvature line running transversely and / or in the direction of the optical axis 14.
- a bend 120 or a bend line is provided which extends at an acute angle to the optical axis 14.
- the diaphragm edge 117 does not run in a straight line but has formations in the horizontal (Z-direction) and vertical (Y-direction) directions.
- the diaphragm edge 117 has an offset portion 124, in which the diaphragm edge 117 extends in a straight line between a horizontal plane E contained in the optical axis 14 and one the same parallel horizontal plane E ', which is arranged in the vertical direction below the optical axis 14.
- the rectilinear offset portion 24 forms an acute angle to the horizontal plane E.
- the diaphragm edge 117 has an edge rounding with a diameter of at least 0.05 mm.
- this embodiment of the invention enables an optimization of the light distribution in terms of range, ride comfort and safety. Image defects of the projection lens 12 can be suppressed.
- the first panel 106 and / or the second panel 109 may also be formed as a substantially flat metal plate, at the free end of which the panel edge 117 extends.
- the metal plate extends horizontally.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Die Erfindung betrifft einen Projektionsscheinwerfer für Fahrzeuge mit einer ersten Projektionslichteinheit zur Erzeugung einer ersten Lichtverteilung und mit einer zweiten Projektionslichteinheit zur Erzeugung einer zweiten Lichtverteilung, die über eine in Lichtaustrittsrichtung vorgelagerte gemeinsame Linse verfügen, wobei die erste Projektionslichteinheit eine erste Reflektoreinrichtung, eine der ersten Reflektoreinrichtung zugeordnete erste Lichtquelleneinrichtung und eine zwischen der ersten Reflektoreinrichtung der Linse angeordnete erste Blende einerseits und die zweite Projektionslichteinheit eine zweite Reflektoreinrichtung, eine der zweiten Reflektoreinrichtung zugeordnete zweite Lichtquelleneinrichtung und eine zwischen der zweiten Reflektoreinrichtung und der Linse angeordnete zweite Blende andererseits aufweist, wobei die erste Reflektoreinrichtung und die zweite Reflektoreinrichtung das von der ersten Lichtquelleneinrichtung bzw. der zweiten Lichtquelleneinrichtung emittierte Licht in der Nähe eines hinteren Brennpunktes der Linse sammeln.The invention relates to a projection headlight for vehicles having a first projection light unit for generating a first light distribution and having a second projection light unit for generating a second light distribution, which have a common lens located in the light exit direction, the first projection light unit having a first reflector device, one of the first reflector device associated a first light source device and a first diaphragm arranged between the first reflector device of the lens and a second reflector device, a second light source device associated with the second reflector device and a second diaphragm arranged between the second reflector device and the lens, the first reflector device and the second reflector means em from the first light source means and the second light source means collected light near a rear focal point of the lens.
Aus der
Aufgabe der vorliegenden Erfindung ist es, einen Projektionsscheinwerfer für Fahrzeuge derart weiterzubilden, dass zur Erzeugung einer vorgegebenen Lichtfunktion die Anzahl der Projektionslichteinheiten verringert werden kann, so dass der Projektionsscheinwerfer Platz sparend aufgebaut ist.Object of the present invention is to develop a projection headlamp for vehicles such that the number of projection light units can be reduced to produce a predetermined light function, so that the projection headlight is constructed to save space.
Zur Lösung dieser Aufgabe ist die Erfindung in Verbindung mit dem Oberbegriff des Patentanspruchs 1 dadurch gekennzeichnet, dass sich die erste Reflektoreinrichtung zumindest in einem Bereich zwischen einer Erstreckungsebene der ersten Lichtquelleneinrichtung und der optischen Achse der Linse erstreckt einerseits und dass sich die zweite Reflektoreinrichtung zumindest in einem Bereich zwischen der Erstreckungsebene der zweiten Lichtquelleneinrichtung und der optischen Achse der Linse andererseits erstreckt.To achieve this object, the invention in conjunction with the preamble of claim 1, characterized in that the first reflector means extends at least in a region between an extension plane of the first light source means and the optical axis of the lens on the one hand and that the second reflector means at least in one Area between the plane of extension of the second light source means and the optical axis of the lens on the other hand extends.
Der besondere Vorteil der Erfindung besteht darin, dass einer Projektionslichteinheit des Projektionsscheinwerfers eine Lichtquelleneinrichtung mit mehr als einer Lichtquelle zugeordnet sein kann, so dass Platz sparend die Anzahl der Projektionslichteinheiten der zur Erzeugung der vorgegebenen Lichtverteilungen verringert werden kann. Dadurch, dass eine erste Lichtquelleneinrichtung und/oder eine Lichtquelleneinrichtung in einem relativ großen Abstand zu einer optischen Achse angeordnet ist, kann eine verbesserte Abführung der bei Betrieb der Lichtquelleneinrichtungen entstehenden Wärme an einen hinteren Kühlkörper gewährleistet sein. Beispielsweise können die Lichtquellenträger massiv ausgebildet sein, ohne die optisch wirksamen Flächen der Projektionslichteinheiten zu reduzieren. Hierdurch ergibt sich eine verbesserte thermische Anbindung der Lichtquelleneinrichtungen, die es ermöglichen, dass die Lichtquelleneinrichtung eine Mehrzahl von Lichtquellen zur Erhöhung der Beleuchtungsstärke aufweisen kann.The particular advantage of the invention is that a light source device with more than one light source can be assigned to a projection light unit of the projection headlamp so that the number of projection light units that can be used to generate the predetermined light distributions can be reduced to save space. Characterized in that a first light source device and / or a light source device is arranged at a relatively large distance from an optical axis, an improved dissipation of the resulting during operation of the light source means heat to a rear heat sink can be ensured. For example, the light source carriers may be solid without reducing the optically effective areas of the projection light units. This results in an improved thermal connection of the light source devices, which make it possible in that the light source device can have a plurality of light sources for increasing the illuminance.
Nach einer bevorzugten Ausführungsform der Erfindung bilden eine Mittelachse der ersten Reflektoreinrichtung und eine Mittelachse der zweiten Reflektoreinrichtung einen Öffnungswinkel von mindestens 30°, vorzugsweise 45°. Hierdurch ist eine maximale Lichtausbeute gewährleistet, da das von den jeweils zugeordneten Reflektoreinrichtungen reflektierte Licht ungehindert in Richtung der Linse reflektiert wird.According to a preferred embodiment of the invention, a center axis of the first reflector device and a center axis of the second reflector device form an opening angle of at least 30 °, preferably 45 °. In this way, a maximum light output is ensured since the light reflected by the respectively associated reflector devices is reflected unimpeded in the direction of the lens.
Nach einer Weiterbildung der Erfindung ist die erste Reflektoreinrichtung aus einem ersten Reflektor und die zweite Reflektoreinrichtung aus einem zweiten Reflektor gebildet, die jeweils über einen Längsabschnitt verfügen, die sich in Lichtaustrittsrichtung asymptotisch an die optische Achse annähern. Vorteilhaft können die Längsabschnitte der Reflektoren zu einer Blendenspitze zusammenlaufen, die Bestandteil der ersten Blende der ersten Projektionslichteinheit und Bestandteil einer zweiten Blende der zweiten Projektionslichteinheit ist. Vorteilhaft kann somit die Blende in den Reflektor integriert sein.According to a development of the invention, the first reflector device is formed of a first reflector and the second reflector device of a second reflector, each having a longitudinal portion which approach asymptotically in the light exit direction to the optical axis. Advantageously, the longitudinal sections of the reflectors can converge to form a diaphragm tip, which is a component of the first diaphragm of the first projection light unit and a component of a second diaphragm of the second projection light unit. Advantageously, therefore, the aperture can be integrated in the reflector.
Nach einer bevorzugten Ausführungsform der Erfindung ist eine einem Reflektor zugeordnete Blende als eine Schrägfläche ausgebildet, die bezüglich einer optischen Achse in Richtung eines Scheitelbereichs des Reflektors ansteigend ausgebildet ist. Im Scheitelbereich des Reflektors ist die Schrägfläche über eine gekrümmte Grenzlinie mit dem Reflektor verbunden.According to a preferred embodiment of the invention, a diaphragm associated with a reflector is designed as an inclined surface, which is designed to increase in the direction of an apex region of the reflector with respect to an optical axis. In the apex area of the reflector, the inclined surface is connected via a curved boundary line with the reflector.
Vorteilhaft weist die erfindungsgemäße Ausführungsform eine Optimierung der Lichtverteilung hinsichtlich der Reichweite, des Fahrkomforts und der Sicherheit auf. Ferner können Abbildungsfehler der Projektionslinse unterdrückt und eine Toleranzempfindlichkeit bei der Herstellung des Scheinwerfers reduziert werden. Dies wird insbesondere durch die erfindungsgemäß ausgebildete Blendenkante bewirkt.Advantageously, the embodiment according to the invention has an optimization of the light distribution in terms of range, ride comfort and safety. Further, aberrations of the projection lens can be suppressed and a tolerance sensitivity in the production of the headlamp can be reduced. This is effected in particular by the diaphragm edge formed according to the invention.
Weitere Vorteile der Erfindung ergeben sich aus den weiteren Unteransprüchen.Further advantages of the invention will become apparent from the further subclaims.
Ausführungsbeispiele der Erfindung wird nachfolgend anhand der Zeichnungen näher erläutert.Embodiments of the invention will be explained in more detail with reference to the drawings.
Es zeigen:
- Fig. 1
- ein schematischer Vertikalschnitt durch eine Projektionsscheinwerfer nach einer ersten Ausführungsform,
- Fig. 2
- ein schematischer Vertikalschnitt durch den Projektionsscheinwerfer gemäß Figur 1 mit einer alternativen ersten und zweiten Reflektoreinrichtung,
wobei exemplarisch Lichtstrahlen eingezeichnet sind, - Fig. 3
- eine perspektivische Seitenansicht eines Projektionsscheinwerfers nach einer weiteren Ausführungsform,
- Fig. 4
- eine perspektivische Darstellung einer ersten und zweiten Reflektoreinrichtung des Projektionsscheinwerfers gemäß
Figur 3 seitlich von vorne gesehen, - Fig. 5
- eine Vorderansicht der ersten und zweien Reflektoreinrichtung des Projektionsscheinwerfers nach
Figur 3 und - Fig. 6
- eine Draufsicht der ersten und zweiten Reflektoreinrichtung des Projektionsscheinwerfers gemäß
Figur 3.
- Fig. 1
- a schematic vertical section through a projection headlamp according to a first embodiment,
- Fig. 2
- 1 is a schematic vertical section through the projection headlamp according to FIG. 1 with an alternative first and second reflector device;
with exemplified light beams, - Fig. 3
- a perspective side view of a projection headlamp according to another embodiment,
- Fig. 4
- 3 is a perspective view of a first and second reflector device of the projection headlight according to FIG. 3, seen laterally from the front,
- Fig. 5
- a front view of the first and second reflector means of the projection headlamp according to Figure 3 and
- Fig. 6
- a top view of the first and second reflector means of the projection headlamp according to Figure 3.
In Figur 1 ist ein Projektionsscheinwerfer 1 dargestellt, der aus einer ersten Projektionslichteinheit 2 zur Erzeugung einer Abblendlichtverteilung und einer zweiten Projektionslichteinheit 3 zur Erzeugung einer Fernlichtverteilung besteht. Die erste Projektionslichteinheit 2 ist im Wesentlichen bezüglich einer horizontalen Ebene symmetrisch zu der zweiten Projektionslichteinheit 3 angeordnet.1 shows a projection headlamp 1 is shown, which consists of a first
Die ersten Projektionslichteinheit 2 weist eine erste Lichtquelleneinrichtung 4, eine erste Reflektoreinrichtung 5 und eine erste Blende 6 auf.The first
Die zweite Projektionslichteinheit 3 weist eine zweite Lichtquelleneinrichtung 7, eine zweite Reflektoreinrichtung 8 und eine zweite Blende 9 auf.The second
Die erste Projektionslichteinheit 2 und die zweite Projektionslichteinheit 3 arbeiten jeweils nach dem Projektionsprinzip, wobei die erste Reflektoreinrichtung 5 bzw. die zweite Reflektoreinrichtung 8 jeweils die von der ersten Lichtquelleneinrichtung 4 emittierten Lichtstrahlen 10 bzw. die von der zweiten Lichtquelleneinrichtung 7 emittierten Lichtstrahlen 11 in die Nähe eines hinteren Brennpunktes F einer von der ersten Projektionslichteinheit 2 und der zweiten Projektionslichteinheit 3 gemeinsam genutzten Linse 12 sammeln. Die Linse 12 ist in Lichtaustrittsrichtung 13 des Projektionsscheinwerfers 1 vor der ersten Reflektoreinrichtung 5 und der zweiten Reflektoreinrichtung 8 bzw. der ersten Blende 6 und der zweiten Blende 9 angeordnet.The first
Die erste Lichtquelleneinrichtung 4 weist vorzugsweise mehrere als Leuchtdioden (LED) ausgebildete Lichtquellen 4' auf, von denen beispielhaft in der Figur 1 bzw. Figur 2 lediglich eine einzige dargestellt ist. Die zweite Lichtquelleneinrichtung 7 weist vorzugsweise mehrere als Leuchtdioden (LED) ausgebildete Lichtquellen 7' auf. Die Lichtquellen 4' der ersten Lichtquelleneinrichtung 4 und die Lichtquellen 7' der zweiten Lichtquelleneinrichtung 7 sind jeweils auf einem nicht dargestellten Lichtquellenträger angeordnet, der in Querrichtung außerhalb einer gedachten parallel zur optischen Achse 14 verlaufenden Verlängerungslinie der Linse 12 angeordnet ist. An den Lichtquellenträger kann sich in rückwärtiger Richtung des Projektionsscheinwerfers ein massiver Kühlkörper anschließen, der insbesondere die durch die Mehrzahl von ersten Lichtquellen 4' erzeugt Wärme abführen kann.The first light source device 4 preferably has a plurality of light sources 4 'designed as light emitting diodes (LED), of which only one is shown by way of example in FIG. 1 or FIG. 2. The second
Wie aus den Figuren 1 und 2 deutlich wird, ist ein Abstand A zwischen einer Erstreckungsebene G und G' der ersten Lichtquelleneinrichtung 4 bzw. der zweiten Lichtquelleneinrichtung 7 zu der optischen Achse 14 der Linse 12 größer als die Quererstreckung der ersten Reflektoreinrichtung 5 und/oder die Quererstreckung der zweiten Reflektoreinrichtung 8. Unter Quererstreckung der ersten Reflektoreinrichtung 5 bzw. der zweiten Reflektoreinrichtung 8 wird die quer zur optischen Achse 14 der Linse 12 verlaufende Erstreckung der Reflektoreinrichtungen 5 bzw. 8 verstanden. Die erste Reflektoreinrichtung 5 erstreckt sich in einem Bereich zwischen der Erstreckungsebene G der ersten Lichtquelleneinrichtung 4 und der optischen Achse 14 der Linse 12. Die zweite Reflektoreinrichtung 8 erstreckt sich zwischen der Erstreckungsebene G' der zweiten Lichtquelleneinrichtung 7 und der optischen Achse 14 der Linse 12.As is clear from Figures 1 and 2, a distance A between an extension plane G and G 'of the first light source device 4 and the second
Die erste Reflektoreinrichtung 5 und die zweite Reflektoreinrichtung 8 sind im Wesentlichen zwischen der ersten Lichtquelleneinrichtung 4 und der zweiten Lichtquelleneinrichtung 7 angeordnet. Eine Mittelachse M der ersten Reflektoreinrichtung 5 und eine Mittelachse M' der zweiten Reflektoreinrichtung 8 bilden einen Öffnungswinkel W von mindestens 10°, vorzugsweise 25°. Die Mittelachsen M, M' der ersten Reflektoreinrichtung 5 und der zweiten Reflektoreinrichtung 8 schneiden sich in dem Brennpunkt F.The first reflector device 5 and the second reflector device 8 are arranged substantially between the first light source device 4 and the second
Die erste Reflektoreinrichtung 5 weist einen ellipsoidförmigen ersten Reflektor 5' auf. Die zweite Reflektoreinrichtung 8 weist einen ellipsoidförmigen zweiten Reflektor 8' auf. Der erste Reflektor 5' erstreckt sich im Wesentlichen spiegelbildlich zu dem zweiten Reflektor 8' oberhalb der optischen Achse 14, während der zweite Reflektor 8' unterhalb der optischen Achse 14 angeordnet ist.The first reflector device 5 has an ellipsoidal first reflector 5 '. The second reflector device 8 has an ellipsoidal second reflector 8 '. The first reflector 5 'extends substantially mirror-inverted to the second reflector 8' above the
Der erste Reflektor 5' weist einen Längsabschnitt 15 auf, der sich in Lichtaustrittsrichtung 13 der optischen Achse 14 nähert. Der zweite Reflektor 8' weist einen Längsabschnitt 16 auf, der sich in Lichtaustrittsrichtung 13 der optischen Achse 14 nähert. Ein vorderes Ende des Längsabschnitts 15 des ersten Reflektors 5' bildet die erste Blende 6 der ersten Projektionslichteinheit 2 zur Erzeugung einer Hell-Dunkel-Grenze für die Abblendlichtverteilung. Ein vorderes Ende des Längsabschnitts 16 des zweiten Reflektors 8' bildet die zweite Blende 9 der zweiten Projektionslichteinheit 3. Die Reflektoren 5', 8' bilden somit zugleich die Blenden für die Projektionslichteinheiten 2, 3. Im vorliegenden Ausführungsbeispiel laufen die Längsabschnitte 15, 16 zu einer Blendenspitze 17 zusammen, die zur Abbildung der Hell-Dunkel-Grenze für die Abblendlichtverteilung dient.The first reflector 5 'has a
Nach einer alternativen Ausführungsform können die Enden der Längsabschnitte 15, 16 des ersten Reflektors 5' bzw. des Reflektors 8' auch in Lichtaustrittsrichtung 13 versetzt zueinander angeordnet sein.According to an alternative embodiment, the ends of the
Nach der in Figur 2 dargestellten Ausführungsform kann der erste Reflektor 5' bzw. der zweite Reflektor 8' jeweils einen Längsabschnitt 18 bzw. 19 aufweisen, die in einem Abstand S zu der Blendenspitze 17 zusammenlaufen.According to the embodiment shown in Figure 2, the first reflector 5 'and the second reflector 8' each have a
Die erste Lichtquelleneinrichtung 4 und die zweite Lichtquelleneinrichtung 7 sind derart angeordnet, dass die Hauptabstrahlrichtung derselben senkrecht zur optischen Achse 14 und hin zur optischen Achse 14 verläuft. Vorzugsweise sind die Lichtquelleneinrichtungen 4 und 7 gegenüberliegend zu der optischen Achse 14 angeordnet. Die erste Reflektoreinrichtung 5 und die zweite Reflektoreinrichtung 8 erstrecken sich im Querschnitt lilienförmig, wobei die Außenfläche der Lilienform mit einer spiegelnden Reflexionsfläche versehen ist.The first light source device 4 and the second
Nach einer weiteren Ausführungsform der Erfindung gemäß den Figuren 3 bis 6 ist im Vergleich zu den vorhergehenden Ausführungsformen eine andere Reflektor- und Blendenanordnung vorgesehen.According to a further embodiment of the invention according to FIGS. 3 to 6, a different reflector and diaphragm arrangement is provided in comparison to the preceding embodiments.
Der Projektionsscheinwerfer weist eine oberhalb der optischen Achse 14 angeordnete erste Reflektoreinrichtung 100 auf, der zwei Lichtquellen 7' (Leuchtdioden) zur Erzeugung einer Abblendlichtverteilung zugeordnet sind. Zu diesem Zweck weist die obere Reflektoreinrichtung 100 zwei nebeneinander angeordnete Reflektoren 105, 105' auf, denen jeweils eine Lichtquelle 7' zugeordnet ist.The projection headlamp has a
Unterhalb der optischen Achse 14 ist eine zweite Reflektoreinrichtung 101 angeordnet, der eine weitere Lichtquelle 7' (Leuchtdiode) zugeordnet ist zur Erzeugung einer Fernlichtverteilung. Die zweite Reflektoreinrichtung 101 weist einen einzigen Reflektor 108 auf, dem die Leuchtdiode 7' zugeordnet ist. Die Leuchtdioden 7' sind - wie bei den vorhergehenden Ausführungsbeispielen - jeweils auf einer der optischen Achse 14 abgewandten Seite der Reflektoren 105, 105' bzw. des Reflektors 108 angeordnet.Below the
Die erste Reflektoreinrichtung 100 und die zweite Reflektoreinrichtung 101 sind einstückig miteinander verbunden, wobei eine auf einer zueinander gewandten Seite angeordnete erste Blende 106 der ersten Reflektoren 105, 105' mit einer zweiten Blende 109 des zweiten Reflektors 108 zu einer gemeinsamen Blendenkante 117 zusammenlaufen. Nach einer nicht dargestellten alternativen Ausführungsform können die erste Reflektoreinrichtung 100 und die zweite Reflektoreinrichtung 101 auch körperlich getrennt zueinander angeordnet sein.The
Die erste Blende 106 und die zweite Blende 109 verlaufen jeweils als eine Schrägfläche unter Bildung eines spitzen Winkels bezüglich einer horizontalen Ebene E, in der die optische Achse 14 verläuft. Ausgehend von der gemeinsamen Blendenkante 117 steigt der Abstand B der ersten Blende 106 zu der zweiten Blende 109 in Richtung des Scheitelbereiches der Reflektoreinrichtungen 100, 101 an, wie aus Figur 4 ersichtlich ist. Im Scheitelbereich der Reflektoreinrichtungen 100 bzw. 101 gehen die erste Blende 106 und die zweiten Blende 109 über eine gekrümmte Grenzlinie 120 bzw. 121 in den ersten Reflektor 105, 105' bzw. den zweiten Reflektor 108 über. Nach einer nicht dargestellten alternativen Ausführungsform können die erste Blende 106 und/oder die zweite Blende 109 auch stetig in den ersten Reflektor 105, 105' bzw. den zweiten Reflektor 108 übergehen.The
Die Schrägflächen der ersten Blende 106 und der zweiten Blende 109 sind uneben ausgebildet und weisen mindestens eine Krümmungsfläche auf. Die Krümmungsfläche kann beispielsweise als eine gewölbte Teilfläche 126, 127 mit mindestens einer quer und/oder in Richtung zur optischen Achse 14 verlaufenden Krümmungslinie ausgebildet sein. In einem in horizontaler Richtung gesehen mittleren Bereich der ersten Blende 106 und der zweiten Blende 109 ist eine Abknickung 120 bzw. eine Abknickungslinie vorgesehen, die sich in einem spitzen Winkel zu der optischen Achse 14 erstreckt.The oblique surfaces of the
Die Blendenkante 117 verläuft nicht geradlinig, sondern weist Ausformungen in horizontaler (Z-Richtung) und vertikaler Richtung (Y-Richtung) auf. Die Blendenkante 117 weist einen Versatzabschnitt 124 auf, in dem die Blendenkante 117 geradlinig verläuft zwischen einer die optische Achse 14 enthaltenen horizontalen Ebene E und einer zu derselben parallelen horizontalen Ebene E', die in vertikaler Richtung unterhalb der optischen Achse 14 angeordnet ist. Der geradlinige Versatzabschnitt 24 bildet einen spitzen Winkel zu der horizontalen Ebene E.The
Die Blendenkante 117 weist eine Kantenverrundung mit einem Durchmesser von mindestens 0,05 mm auf.The
Vorteilhaft ermöglicht diese Ausführungsform der Erfindung eine Optimierung der Lichtverteilung hinsichtlich der Reichweite, des Fahrkomforts und der Sicherheit. Abbildungsfehler der Projektionslinse 12 können unterdrückt werden.Advantageously, this embodiment of the invention enables an optimization of the light distribution in terms of range, ride comfort and safety. Image defects of the
Nach einer nicht dargestellten alternativen Ausführungsform der Erfindung können die erste Blende 106 und/oder die zweite Blende 109 auch als eine im Wesentlichen ebene Blechplatte ausgebildet sein, an deren freien Ende sich die Blendenkante 117 erstreckt. Vorzugsweise erstreckt sich die Blechplatte waagerecht.According to an alternative embodiment of the invention, not shown, the
- 11
- Projektionsscheinwerferprojection headlights
- 22
- erste Projektionslichteinheitfirst projection light unit
- 33
- zweite Projektionslichteinheitsecond projection light unit
- 4, 4'4, 4 '
- erste Lichtquelleneinrichtungfirst light source device
- 5, 5'5, 5 '
- erste Reflektoreinrichtungfirst reflector device
- 66
- erste Blendefirst aperture
- 7, 7'7, 7 '
- zweite Lichtquelleneinrichtungsecond light source device
- 8, 8'8, 8 '
- zweite Reflektoreinrichtungsecond reflector device
- 99
- zweite Blendesecond aperture
- 1010
- Lichtstrahlenlight rays
- 1111
- Lichtstrahlenlight rays
- 1212
- Linselens
- 1313
- LichtaustrittsrichtungLight exit direction
- 1414
- optische Achseoptical axis
- 1515
- Längsabschnittlongitudinal section
- 1616
- Längsabschnittlongitudinal section
- 1717
- Blendenspitzedazzle peak
- 1818
- Längsabschnittlongitudinal section
- 1919
- Längsabschnittlongitudinal section
- 100100
- erste Reflektoreinrichtungfirst reflector device
- 101101
- zweite Reflektoreinrichtungsecond reflector device
- 105, 105'105, 105 '
- Reflektorenreflectors
- 106106
- erste Blendefirst aperture
- 108108
- Reflektorreflector
- 109109
- zweite Blendesecond aperture
- 117117
- gemeinsame Blendenkantecommon aperture edge
- 120120
- gekrümmte Grenzliniecurved borderline
- 121121
- gekrümmte Grenzliniecurved borderline
- 124124
- Versatzabschnittoffset portion
- 126126
- gewölbte Teilflächecurved partial surface
- 127127
- gewölbte Teilflächecurved partial surface
- BB
- Abstanddistance
- E, E'E, E '
- horizontale Ebenehorizontal plane
Claims (19)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006041942A DE102006041942A1 (en) | 2006-09-07 | 2006-09-07 | Projection headlight for vehicle, has reflector devices extending in area between extension level of respective light source device and optical axis of lens, where light source devices are attached to respective reflector devices |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1912018A1 true EP1912018A1 (en) | 2008-04-16 |
EP1912018B1 EP1912018B1 (en) | 2013-11-27 |
Family
ID=38657167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07115620.2A Active EP1912018B1 (en) | 2006-09-07 | 2007-09-04 | Projection headlamp for vehicles |
Country Status (2)
Country | Link |
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EP (1) | EP1912018B1 (en) |
DE (1) | DE102006041942A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2011045103A1 (en) | 2009-10-15 | 2011-04-21 | Hella Kgaa Hueck & Co. | Projection headlight for vehicles |
JP2012022988A (en) * | 2010-07-16 | 2012-02-02 | Koito Mfg Co Ltd | Vehicular lighting fixture |
CN103423685A (en) * | 2012-05-17 | 2013-12-04 | 奥斯兰姆施尔凡尼亚公司 | Vehcile headlamp with both low-beam and high-beam and devoid of moving parts |
WO2014165884A2 (en) | 2013-04-09 | 2014-10-16 | Zizala Lichtsysteme Gmbh | Lamp unit comprising a shield having at least one light window |
CN104819422A (en) * | 2014-02-05 | 2015-08-05 | 株式会社小糸制作所 | Vehicle lamp |
EP2045514B1 (en) | 2007-10-05 | 2015-12-09 | Automotive Lighting Italia S.p.A. | Modular reflective optical lighting system and lighting device equipped therewith, in particular for vehicles |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102008047728B4 (en) * | 2008-09-18 | 2021-01-28 | HELLA GmbH & Co. KGaA | Headlights for automobiles |
DE102012211613A1 (en) * | 2012-07-04 | 2014-01-09 | Automotive Lighting Reutlingen Gmbh | light module |
DE102012106483A1 (en) | 2012-07-18 | 2014-01-23 | Hella Kgaa Hueck & Co. | Projection type headlamp for vehicle, has first and second light units that are provided to emit light on lens and deflection reflector to produced respective light function |
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EP1267116A1 (en) * | 2001-06-14 | 2002-12-18 | Valeo Vision | Lighting or signalling device |
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JP4094446B2 (en) * | 2003-02-03 | 2008-06-04 | 株式会社小糸製作所 | Vehicle headlamp and light emitting module |
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JP4413762B2 (en) * | 2004-12-07 | 2010-02-10 | 株式会社小糸製作所 | Lighting fixtures for vehicles |
-
2006
- 2006-09-07 DE DE102006041942A patent/DE102006041942A1/en not_active Withdrawn
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EP0416253A2 (en) * | 1989-09-08 | 1991-03-13 | Inotec Gmbh Gesellschaft Für Innovative Technik | Light |
EP1267116A1 (en) * | 2001-06-14 | 2002-12-18 | Valeo Vision | Lighting or signalling device |
DE102004047301A1 (en) | 2003-09-29 | 2005-05-04 | Koito Mfg Co Ltd | vehicle headlights |
EP1607677A1 (en) | 2004-06-17 | 2005-12-21 | Osram Sylvania Inc. | Light emitting diode lamp with conical reflector |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2045514B1 (en) | 2007-10-05 | 2015-12-09 | Automotive Lighting Italia S.p.A. | Modular reflective optical lighting system and lighting device equipped therewith, in particular for vehicles |
EP2045514B2 (en) † | 2007-10-05 | 2022-02-16 | Marelli Automotive Lighting Italy S.p.A. | Modular reflective optical lighting system and lighting device equipped therewith, in particular for vehicles |
WO2011045103A1 (en) | 2009-10-15 | 2011-04-21 | Hella Kgaa Hueck & Co. | Projection headlight for vehicles |
DE102009049458A1 (en) | 2009-10-15 | 2011-04-28 | Hella Kgaa Hueck & Co. | Projection headlamps for vehicles |
JP2012022988A (en) * | 2010-07-16 | 2012-02-02 | Koito Mfg Co Ltd | Vehicular lighting fixture |
CN103423685A (en) * | 2012-05-17 | 2013-12-04 | 奥斯兰姆施尔凡尼亚公司 | Vehcile headlamp with both low-beam and high-beam and devoid of moving parts |
EP2664841A3 (en) * | 2012-05-17 | 2015-02-18 | Osram Sylvania Inc. | Vehcile headlamp with both low-beam and high-beam and devoid of moving parts |
CN103423685B (en) * | 2012-05-17 | 2019-07-12 | 奥斯兰姆施尔凡尼亚公司 | Head lamp characterized by both dipped beam and distance light output and non-activity part |
WO2014165884A2 (en) | 2013-04-09 | 2014-10-16 | Zizala Lichtsysteme Gmbh | Lamp unit comprising a shield having at least one light window |
CN104819422A (en) * | 2014-02-05 | 2015-08-05 | 株式会社小糸制作所 | Vehicle lamp |
US9631786B2 (en) | 2014-02-05 | 2017-04-25 | Koito Manufacturing Co., Ltd. | Vehicle lamp with predetermined positioning of shade and projection lens focal point |
Also Published As
Publication number | Publication date |
---|---|
DE102006041942A1 (en) | 2008-03-27 |
EP1912018B1 (en) | 2013-11-27 |
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