EP3218645A1 - Einzelscheinwerfer für ein kraftfahrzeug - Google Patents
Einzelscheinwerfer für ein kraftfahrzeugInfo
- Publication number
- EP3218645A1 EP3218645A1 EP15787474.4A EP15787474A EP3218645A1 EP 3218645 A1 EP3218645 A1 EP 3218645A1 EP 15787474 A EP15787474 A EP 15787474A EP 3218645 A1 EP3218645 A1 EP 3218645A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- illumination
- light
- illumination surface
- headlamp
- individual
- 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
- 238000005286 illumination Methods 0.000 claims abstract description 93
- 239000007787 solid Substances 0.000 claims description 18
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 2
- LFEUVBZXUFMACD-UHFFFAOYSA-H lead(2+);trioxido(oxo)-$l^{5}-arsane Chemical compound [Pb+2].[Pb+2].[Pb+2].[O-][As]([O-])([O-])=O.[O-][As]([O-])([O-])=O LFEUVBZXUFMACD-UHFFFAOYSA-H 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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
- F21S41/16—Laser light sources
-
- 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
- F21S41/176—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
Definitions
- the invention relates to an individual headlight for a motor vehicle, having at least one light source for emitting at least a first and a second light beam, and having a first and a second controllable deflection element for respectively variably deflecting the first and the second light beam into a respective first and second light beam second solid angle range to a predetermined illumination surface. Corresponding to the respective solid angle regions on the illumination surface respective illumination areas, which are illuminated by the respective light beams.
- the invention also relates to a motor vehicle with such a single headlight and a method for operating such a single headlight.
- a light beam is used to run a predetermined illumination surface, so scan or scan, and thus illuminate.
- the illumination surface can be excited to emit light.
- the light beam is deflected variable via controllable deflecting elements, so that individual points of the lighting surface are traversed one after the other. Similarly, this is known from a screen of a cathode ray tube that is illuminated with an electron beam.
- DE 10 2010 048 659 B4 discloses a lighting device of a motor vehicle with a light source, a micromirror arrangement, an absorber and at least one optical element.
- light from the light source is incident on the micromirror arrangement and is reflected by the latter, depending on the configuration of the micromirror arrangement, on the absorber or on an optical element.
- DE 10 2012 002 232 A1 describes an illumination device of a vehicle with laser light sources and with an optical system for setting a light distribution, wherein the laser light sources emit laser light of the colors red, green or blue.
- the optics comprises two mirror systems with respective fixed or movable mirror elements.
- the laser light sources are each assigned a mirror element of the first mirror system, by means of which the laser light is deflected onto the second mirror system in such a way that the laser light reflected by the second mirror system appears white.
- DE 197 37 653 A1 describes a lighting device with a plurality of electronically controllable and switchable between two mirror settings micromirrors, which form a mirror surface, which is illuminated by a light source. By switching a part of the micromirrors, a light distribution of a light leaving a light exit opening can be varied.
- WO 2014/121 315 A1 describes a headlight for motor vehicles.
- the headlamp comprises a first group of at least two laser sources and a second group of at least two laser sources.
- the first and the second group of laser sources each generate at least two light bands.
- the light bands are directed to a light conversion means via a beam deflection means.
- WO 2014/121 314 A1 discloses a headlight for a motor vehicle.
- a modulated light beam is directed via a pivotable micromirror onto a light conversion means.
- the light image generated at the light conversion means is projected onto a roadway. It is the object of the present invention to achieve an improved illumination of an environment of a motor vehicle.
- the invention relates to an individual headlight, that is to say a single headlight, for a motor vehicle which has at least one light source for emitting a first and a second light beam. It Thus, at least two light beams are emitted by one or more light sources.
- the individual headlight further comprises at least a first and at least one second controllable deflection element for respectively variably deflecting the first and the second light beam in a respective first and second solid angle range to a predetermined illumination surface. It can also be provided here more than two light beams, for example, three light beams, each with at least one deflection, so then the individual headlamp has at least three deflection.
- the individual headlight for controlling the deflection elements may have a control unit.
- the respective solid angle regions correspond to respective illumination regions on the illumination surface which are illuminated by the respective light rays.
- the respective illumination area the illumination area is traversed, respectively scanned or scanned, and thus illuminated or illuminated by the light beams.
- the light rays can also be pulsed.
- the solid angle ranges can be determined by at least two respective extreme positions of the controllable deflection elements. In these as well as in a plurality of intermediate positions of the deflection elements, the respective deflection elements can then direct the respective light beams on the extreme positions and the intermediate positions assigned points in the respective illumination area. In the respective extreme positions of the respective light beam can be directed by the controllable deflection on the edge of the footprint.
- the illumination surface has two edge areas and a central area, wherein the edge areas make up a large part of the illumination area.
- the central area and the two border areas are disjoint, ie each different from each other without an overlap.
- the two footprints both extend into the central area and furthermore each comprise only one, respectively different, of the two edge areas.
- the central region which may for example comprise a center of the illumination surface, there is thus a respective part of the edge of the respective illumination regions.
- the brightness in the central area is particularly greatly increased compared to the two edge areas, in particular by more than a factor of two.
- the required minimum brightness values in a central region of the light distribution are also easier to achieve, so that the light source can also have a lower beam power and be designed to be weaker.
- the light beams each have the same wavelength or wavelength distribution. This has the advantage that multiple light beams can be generated with only a single light source. Moreover, in the different areas, especially in the different edge areas, a uniform color of the light distribution is achieved.
- the illumination surface comprises a surface of a, in particular fluorescent, converter element for converting the light beams into light of a different, larger wavelength.
- the illumination surface comprises a transparent surface of the individual headlamp, in particular a surface of a disc and / or a surface of an optical lens of the individual headlamp.
- the disc may for example be part of a front glazing of the individual headlamp.
- an overlapping region of the illumination surface can be illuminated by the first light beam and the second light beam, wherein a first residual region of the illumination surface, which is different from the overlap region, can be illuminated by the first and not by the second light beam, and a second remaining region of the illumination surface, which is different from the overlap region and the first residual region, can be illuminated by the second and not by the first light beam.
- the first and / or the second residual region corresponds in each case to a majority of the first or second solid angle range.
- the overlapping area may preferably correspond to between 5 and 15% of the respective entire illumination areas or between 5 and 15% of the solid angle ranges or a solid angle range between 2.5 and 5 ° of at least one of the deflection elements. This has the advantage that a maximum brightness can be achieved in the central area or in the overlapping area by overlapping the illumination areas.
- At least one of the two deflection elements is arranged more remote from one of the two edge regions than from the other edge region and the illumination region assigned to this deflection element comprises the edge region which is more remote from this deflection element. It can be maximized at a given geometric arrangement of lighting surface and deflecting the average distance between the deflector and associated footprint. Thus, the angular offset of the light beam can be reduced within the footprint. This has the advantage that the resolution in the central area is improved. This corresponds to the requirements for a light distribution for a motor vehicle.
- the deflection elements each comprise at least one micromirror.
- Micromirrors are usually operated resonantly or quasi-statically for beam deflection. Accordingly, in a peripheral region in which a direction of movement of a deflected beam must be reversed, very long residence times of the beam on the illumination surface generated. This is especially true for the resonant mode. Since the brightness of an irradiated area point is, according to Talbot's law, given by the intensity and the residence time of the beam at this surface point, the brightness in the middle of the illumination area is smallest and at the edge of the illumination area the largest. The factor between edge area and center is typically between 10 and 90 in the case of a micromirror.
- micromirrors thus has the advantage that the brightness improvement in the central area is particularly high.
- An average brightness can thus be increased in the central region by a factor of, for example, at least 10 and up to 90 in comparison to an average brightness in the edge regions per micromirror.
- the light source comprises a semiconductor light source, in particular a laser diode and / or a light emitting diode. This has the advantage that the light beams are generated particularly efficiently and when using a laser diode particularly high luminance can be achieved.
- the invention also includes a motor vehicle with a single headlight according to one of the described embodiments.
- the invention also relates to a method for operating a single headlamp, ie a single headlamp, for a motor vehicle.
- This comprises radiating a first and a second light beam through a light source. It also comprises a respective variable deflection of the first and the second light beam into a respective first and second solid angle range to a predetermined illumination surface by a first and a second controllable deflection element.
- the illumination surface has two edge regions and a central region, and the edge regions make up a major part of the illumination surface.
- the driving of the deflecting element can be effected for example by a control unit.
- the method comprises illuminating respective illuminating regions corresponding to the respective solid angle regions on the illuminating surface, both of which extend into the central region and, moreover, each comprise only one of the two edge regions.
- the illumination can be done by a departure of the respective illumination areas with the respective light beam.
- Fig. 1 is a schematic representation of an exemplary
- FIG. 2 shows a schematic representation of an exemplary light distribution on an illumination surface, as can be produced by a further exemplary embodiment of an individual headlight.
- Fig. 1 shows a schematic representation of an exemplary embodiment of a single headlamp.
- the individual headlamp 1 has a first light source 2 and a second light source 3, which are embodied identically here and emit, for example, monochromatic light of a predetermined wavelength, for example 450 nm, in the form of a first light beam 4 and a second light beam 5 as laser diodes.
- the individual headlamp 1 also comprises a first and a second optical system 6, 7, which may each contain a plurality of optical components. In the present case, these are, for example, in each case a filter element 8, 9, a fixed deflection element 10, 11 and respective optical lenses 12, 13.
- the individual headlight 1 further comprises a first controllable deflection element 14 and a second controllable deflection element 15. Finally, the individual headlight 1 comprises In the example shown, a fluorescent converter element 16 and here also a converging lens 17.
- the illustration here is a sectional view perpendicular to an illumination surface 20 of the converter element 16 embodied here as a plane.
- the illumination surface 20 may alternatively also be curved.
- the respective first and second light beams 4, 5 After being emitted by the first and second light sources 2, 3, the respective first and second light beams 4, 5 pass through the respective first and second optical systems 6, 7 in order then to strike the first and second deflection elements 14, 15, respectively. At these controllable deflection elements 14, 15, the two light beams 4, 5 are deflected variable. Due to the variable deflection, the two light beams 4, 5 pass over a respective first and second solid angle range ⁇ - 1 , ⁇ 2 .
- the light beam 4, 5 is shown in three exemplary positions or positions of the deflecting elements 14, 15 so that the first light beam 4 is shown as splitting into first light beams 4a, 4b, 4c and the second light beam 5 is shown as in three Light beams 5a, 5b, 5c splitting.
- the respective middle light beams 4b, 5b correspond to a deflection by the deflection element 14, 15 in a neutral position
- the respective edge light beams 4a, 4c, 5a, 5c correspond to a deflection of the respective light beams 4, 5 by the two deflection elements 15, 15 in extreme positions.
- the deflecting elements 14, 15 are respectively pivoted so as to cover the first and the second solid angle range ⁇ , 0: 2 with the respective light beam.
- the two solid angle regions c, 02 are each shown two-dimensionally in an xz plane, but in this example they also include a region which extends in the y direction perpendicular to the xz plane.
- a respective first illumination area 18 and second illumination area 19 of an illumination area 20 of the converter element 16 are illuminated or driven off by the respective light beams 4, 5.
- the respective light beam 4, 5 is thus repeatedly guided or driven over the respective illumination area 18, 19, so that in the present case the illumination area 20 in the worn illumination areas 18, 19 is excited to shine.
- the light beams 4a, 4c, 5a, 5c deflected in the extreme positions of the respective deflection elements 14, 15 each determine an edge of the associated respective illumination area 18, 19 and excite it Emitting a light. Since the deflecting elements 14, 15 are embodied here as micromirrors, the deflecting elements 14, 15 are moved back and forth between the two extreme positions.
- the deflecting elements 14, 15 thus have a zero speed in the extreme positions and the brightness is given by a given intensity and a given dwell time at a point according to Talbot 's law, the brightness is at the edge of the respective footprints 18, 19 by a multiple higher than in a central region of the two footprints 18, 19.
- the two illumination areas 18, 19 adjoin one another in a center of the illumination area 20, so that this center is particularly bright.
- the two illumination areas 18, 19 could not adjoin one another directly but could be separated by a small area of the illumination area 20 which is not illuminated by the light beams 4, 5.
- the two illumination areas 18, 19 may also overlap.
- an increased brightness is achieved in a central area 21, in which the two illumination areas 18, 19 extend, whereas in a respective first edge area 22 and in a second edge area 23 of the illumination area 20 only the usual state of the art usual brightness is achieved.
- the central region 21 corresponds to a central region of a light distribution and thus a center of illumination of an environment of the motor vehicle, this arrangement is particularly advantageous.
- the respective light sources 2, 3 and deflection elements 14, 15 are arranged symmetrically with respect to the illumination surface 20. Of course, asymmetric arrangements are possible.
- the respective deflection elements 14, 15 it is also possible to adjust the respective deflection elements 14, 15 so that an average distance between the respective illumination region 18, 19 and the deflection element 14, 15 is maximized.
- at least one of the two deflecting elements 14, 15, in the present case both is located more remote from one of the two edge regions 22, 23 than from the respective other edge region 23, 22.
- the first deflecting element 14 is further away from the second edge region 23 arranged as from the first edge region 22.
- the second deflecting element 15 is arranged farther from the first edge region 22 than from the second Edge region 23.
- the respective illumination regions 18, 19 can now be displaced by setting the corresponding solid angle range ⁇
- FIG. 2 shows a schematic representation of an exemplary illumination surface of a further exemplary embodiment of a single headlight.
- the illumination surface 20, which extends in an xy plane, here has a first illumination region 18, a second illumination region 19 and a third illumination region 24.
- the first and second illumination regions 18, 19 overlap in a first central region 21.
- both illumination regions 18, 19 are embodied in a rectangular shape and together also form a rectangle, which extends mainly in the x-direction.
- the third footprint area 24 also forms a rectangle which extends mainly in the x direction and in the example shown is longer in this direction than either of the two footprints 18, 19.
- the third footprint is offset in the y direction from the first two footprints 18, 19 and overlaps with the first illumination area 18 in a second central area 25 and with the second illumination area 19 in a third central area 26.
- All three central areas 21, 25, 26 overlap here again in a region which in this example a Center M of the illumination surface 20 includes. It can be achieved by the overlap of all three footprints 18, 19, 24 in the center M and a surrounding area of the illumination surface 20, a maximum brightness.
- the illumination surface is here symmetrical with respect to an axis of symmetry A, which runs through the center M in the y-direction.
- light functions such as a dipped beam or a high beam can be realized by adjusting the amount of overlap or even certain illumination areas 18, 19, 24 are no longer illuminated by a respective light beam.
- a lighting of the entire illustrated illumination surface 20 corresponds to a high beam and, for example, a low beam function can be achieved by no longer illuminating or illuminating the first illumination region 18 and thus obscuring it.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014016853.0A DE102014016853A1 (de) | 2014-11-13 | 2014-11-13 | Einzelscheinwerfer für ein Kraftfahrzeug |
PCT/EP2015/002154 WO2016074766A1 (de) | 2014-11-13 | 2015-10-29 | Einzelscheinwerfer für ein kraftfahrzeug |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3218645A1 true EP3218645A1 (de) | 2017-09-20 |
EP3218645B1 EP3218645B1 (de) | 2020-04-08 |
Family
ID=54364255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15787474.4A Active EP3218645B1 (de) | 2014-11-13 | 2015-10-29 | Einzelscheinwerfer für ein kraftfahrzeug |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3218645B1 (de) |
DE (1) | DE102014016853A1 (de) |
ES (1) | ES2788708T3 (de) |
WO (1) | WO2016074766A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016006815A1 (de) * | 2016-06-03 | 2017-12-07 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | Scheinwerfervorrichtung für ein Fahrzeug |
DE102016006798A1 (de) * | 2016-06-03 | 2017-12-07 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Scheinwerfervorrichtung für ein Fahrzeug |
JP7382242B2 (ja) * | 2020-01-30 | 2023-11-16 | スタンレー電気株式会社 | 照明装置及び車両用灯具 |
JP7382241B2 (ja) * | 2020-01-30 | 2023-11-16 | スタンレー電気株式会社 | 照明装置及び車両用灯具 |
DE102021212159A1 (de) * | 2021-10-27 | 2023-04-27 | Psa Automobiles Sa | Scheinwerfervorrichtung eines Fahrzeugs und Verfahren zum Ausleuchten eines aus einem ersten Projektionsbereich und aus einem zweiten Projektionsbereich zusammengesetzten Projektionsfelds |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19737653A1 (de) | 1997-08-29 | 1999-03-04 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Beleuchtungseinrichtung für Fahrzeuge und Betriebsverfahren für eine derartige Beleuchtungseinrichtung |
JP5118564B2 (ja) * | 2008-06-24 | 2013-01-16 | 株式会社小糸製作所 | 車両用灯具 |
JP5577138B2 (ja) * | 2010-04-08 | 2014-08-20 | スタンレー電気株式会社 | 車両用前照灯 |
DE102010048659B4 (de) | 2010-10-15 | 2012-05-03 | Automotive Lighting Reutlingen Gmbh | Beleuchtungseinrichtung eines Kraftfahrzeugs |
DE102012002232A1 (de) | 2012-02-04 | 2012-09-20 | Daimler Ag | Beleuchtungsvorrichtung für ein Fahrzeug |
FR2993831B1 (fr) * | 2012-07-27 | 2015-07-03 | Valeo Vision | Systeme d'eclairage adaptatif pour vehicule automobile |
AT513916B1 (de) * | 2013-02-07 | 2015-04-15 | Zizala Lichtsysteme Gmbh | Scheinwerfer für ein Kraftfahrzeug und Verfahren zum Erzeugen einer Lichtverteilung |
AT514834B1 (de) * | 2013-02-07 | 2017-11-15 | Zkw Group Gmbh | Scheinwerfer für ein Kraftfahrzeug und Verfahren zum Erzeugen einer Lichtverteilung |
JP6360699B2 (ja) * | 2014-03-25 | 2018-07-18 | スタンレー電気株式会社 | ヘッドランプ |
-
2014
- 2014-11-13 DE DE102014016853.0A patent/DE102014016853A1/de not_active Ceased
-
2015
- 2015-10-29 WO PCT/EP2015/002154 patent/WO2016074766A1/de active Application Filing
- 2015-10-29 ES ES15787474T patent/ES2788708T3/es active Active
- 2015-10-29 EP EP15787474.4A patent/EP3218645B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
EP3218645B1 (de) | 2020-04-08 |
DE102014016853A1 (de) | 2016-05-19 |
ES2788708T3 (es) | 2020-10-22 |
WO2016074766A1 (de) | 2016-05-19 |
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