EP3447371A1 - Light device for a motor vehicle headlight - Google Patents
Light device for a motor vehicle headlight Download PDFInfo
- Publication number
- EP3447371A1 EP3447371A1 EP18183048.0A EP18183048A EP3447371A1 EP 3447371 A1 EP3447371 A1 EP 3447371A1 EP 18183048 A EP18183048 A EP 18183048A EP 3447371 A1 EP3447371 A1 EP 3447371A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- reflector
- lighting device
- light source
- areas
- 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
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- 230000003287 optical effect Effects 0.000 claims abstract description 26
- 230000001678 irradiating effect Effects 0.000 claims abstract description 4
- 238000003384 imaging method Methods 0.000 claims description 20
- 230000003068 static effect Effects 0.000 claims description 11
- 239000003550 marker Substances 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
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- 230000011664 signaling Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
- F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
- F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
- F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
-
- 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]
-
- 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
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
- F21S41/255—Lenses with a front view of circular or truncated circular outline
-
- 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
-
- 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
- F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
- F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations
-
- 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
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
- F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching 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
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
- F21S43/31—Optical layout 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
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
-
- 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
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/048—Optical design with facets structure
-
- 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
- F21V7/00—Reflectors for light sources
- F21V7/10—Construction
-
- 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]
- F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
- F21S41/145—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device the main emission direction of the LED being opposite to the main emission direction of the illuminating device
-
- 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
-
- 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
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
-
- 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 lighting device for a motor vehicle headlight, comprising a reflector having a total reflection surface for reflecting light at least partially in the direction of an optical axis of the reflector, a first and a second light source for irradiating light onto the reflector, wherein the first and the second light source at least in a direction normal to the optical axis of the reflector are spaced from each other, wherein the total reflection surface of the reflector comprises a number of the first light source facing first reflection sub-areas, which set up for imaging the radiated light from the first light source in the form of at least a first light distribution of a first light function are, wherein the total reflection surface of the reflector comprises a number of the second light source facing second reflection sub-areas, which is used to image the incident light from the second light source in the form of a second light distribution of a second light function are set up.
- the invention relates to a vehicle headlight with a lighting device according to the invention and a motor vehicle with a lighting device according to the invention and / or a vehicle headlight according to the invention.
- Lighting devices of the type mentioned are known, for example from headlamps, in which two light sources are mounted in front of a reflector assembly, wherein the reflector assembly has different areas that are provided to fulfill different lighting functions.
- headlamps have become known in which a low-beam source and a high-beam source are mounted in front of a one-piece reflector arrangement, wherein the reflector arrangement for generating two different light distributions, namely a low-beam distribution and a high beam distribution, has two different reflector areas.
- it is especially important to avoid crosstalk from the low beam to the high beam which can be achieved by appropriate design measures.
- a spatial and structural separation of individual reflector areas to implement different light distributions leads to restrictions on the size of the lighting device, which also involves limitations in its design.
- An object of the invention is to provide a lighting device that can be designed largely freely in shape and is suitable for generating at least two mutually different light distributions.
- the total reflection surface of the reflector is at least partially composed of alternately juxtaposed first and second reflection surfaces, wherein the first and the second light source are arranged in such an area lying in front of the reflector area, that their radiated light is at least partially irradiated against the reflector against the direction of the optical axis of the reflector.
- the lighting device according to the invention is not subject to any particular restrictions with respect to its size.
- the arrangement of the light sources in front of the reflector in particular in the case of use for a vehicle headlamp, enables improved cooling of the light sources, since the area in front of the reflector can be closed, for example, with a cover plate, via which heat emitted by the light sources can be released to the surroundings ,
- optical axis of the reflector is understood to mean an optical axis which is oriented in the main emission direction of the reflector.
- the first and second light functions do not necessarily have to be different from each other. However, the light distributions that are generated by the respective light source and the associated reflection sub-area, from each other are different. This should mean that, for example, the first light distribution and the second light distribution can each form part of a total light distribution. Thus, it is conceivable, for example, that the first light distribution and the second light distribution together result in a low-beam light distribution - that is, the first light distribution and the second light distribution individually represent partial light distributions.
- a number of in the context of this disclosure, unless otherwise stated, means a number which is at least two and may be two, three, four or more, in particular six, eight, ten, twelve or more than twelve , The person skilled in the art, in view of this disclosure, is able to choose the number of respective elements according to an application.
- total reflection area refers to the entire area of the reflector that is set up to reflect light from the light sources.
- the first light function and the second light function are selected from the group: daytime running light, position light, side marker light, turn signal light, low beam, cornering light, high beam, static cornering or cornering light.
- Those skilled in the art are aware of these light functions, the associated light distributions being specified in the relevant guidelines and standards.
- first and the second light function deviate from one another, wherein in principle all permutations or combinations of said functions are conceivable.
- the following combinations can be implemented particularly advantageous: daytime running light / position light; Daytime running light / side marker light; Daytime running light / direction indicator light or flashing light; Direction indicator light / position light; Turn signal light / side marker light; Dipped beam / cornering light; High beam / cornering light; Dipped beam / static cornering light; static cornering light left / static cornering light right; or also a specific combination of individual segments of a matrix-segmented lighting device, in which the light distribution generated by the lighting device is composed of individual segments, e.g. could be combined as follows: high beam / low beam matrix segment a / high beam / low beam matrix segment.
- first and / or second reflection sub-areas may have microstructures which are set up to deflect light toward a third light distribution (selected from the light distributions mentioned above).
- the total reflection surface consists exclusively of juxtaposed first and second reflection sub-surfaces.
- the total reflection surface has at least one third reflection sub-area, preferably a number of third reflection sub-areas, for generating a further light distribution.
- the at least one third reflection sub-surface faces the first and / or the second light source.
- the lighting device has a third light source, and the third reflection sub-surface of the third light source is facing.
- the lighting device has a light sensor for checking the light function of at least one of the light sources, wherein the light distribution generated by the at least one third reflection sub-area is formed and the light sensor is arranged such that the at least a third Reflected surface irradiation light distribution on the light sensor.
- This light sensor can be connected to an evaluation unit, for example, which monitors the state of the lighting device and, if it concludes that it has a faulty state, sets appropriate measures, such as an error indication.
- the light distribution generated by the at least one third reflection sub-area is a light distribution of a light function selected from the following group: daytime running light, position light, side marker light, turn signal light, low beam, cornering light, high beam, static cornering light, cornering light.
- individual reflection sub-areas in particular the first and second reflection sub-areas, are strip-shaped and arranged next to one another, whereby strips arranged next to one another are connected to one another.
- the connection of the strips can either directly with each other or via other intermediate strips, such as strips of a third reflection sub-surface done.
- the first light source radiate at first angles of incidence and the second light source at second angles of incidence onto the respective reflection faces, each reflecting portion having an angle of inclination which does not correspond to the respective angle of incidence assigned light source exceeds, wherein the angle are based on the optical axis of the reflector.
- the light sources can be arranged, for example, at an angle between 20 ° and 75 ° with respect to the optical axis. The arrangement transverse to the optical axis of the reflector allows a short construction of the lighting device in the direction of the optical axis of the reflector.
- the lighting device has an imaging optics, which is downstream of the reflector for imaging at least a portion of the reflected light from the reflector.
- the imaging optics can be designed as a projection lens or, for example, as a cushion optic.
- the imaging optics has microstructures for selectively influencing the light distribution emitted by the imaging optics.
- microstructures is understood to mean protrusions or depressions on the surface of the respective optical component whose dimensions are at most a few tenths of a millimeter and which are suitable for influencing the light image emitted by the respective optical element.
- the microstructures can be set up to deflect light in a specific direction in a targeted manner. Alternatively, they may also be configured to generate a diffuse radiation.
- the reflector is designed as a separate optical component.
- the reflector is integrally formed with a light-conducting body, which comprises the imaging optics, in that the reflector is formed on a light-reflecting end portion of the light-conducting body.
- individual reflection sub-areas in particular the first and second reflection sub-areas, are formed as juxtaposed strip-shaped areas on the surface of the end portion, wherein the first and the second reflection sub-areas are inclined to each other.
- the inclination of the reflection sub-areas with respect to the incident light may already be sufficient to allow total reflection.
- the strip-shaped surfaces are coated with a light-reflecting layer.
- the respective reflection sub-areas may be inclined in such a way that only certain reflection sub-areas are "visible" or can be illuminated for the respective light source.
- the first reflection sub-areas may be arranged such that the second reflection sub-areas are in the shadow of the first reflection sub-areas, as viewed from the first light source.
- the first reflection sub-areas may also be in the shadow of the first reflection sub-areas as viewed from the second light source.
- individual reflection sub-areas in particular the first and second reflection sub-areas, have microstructures for selectively influencing the light distribution emitted by the reflection sub-areas.
- At least one collimator element for bundling the light to be arranged in the direction of the reflector, at least between the reflector and the first and the second light source.
- the collimator element is set up to direct light emitted by the light source in parallel in the direction of the reflector, in particular in the direction of the respective reflection sub-area.
- At least one of the light sources preferably all light sources, comprises at least one LED.
- any other light sources such as laser light sources, halogen light sources, xenon light sources, etc. may be provided.
- a vehicle headlight in particular a motor vehicle headlight, comprising a lighting device according to the invention and a cover, wherein the lighting device is arranged such that the back of the light sources facing the cover.
- the light sources can be cooled particularly effectively, whereby their performance and / or their life can be increased.
- the waste heat of the light source for defrosting or defrosting the cover can be used.
- Another aspect of the invention relates to a vehicle with a lighting device according to the invention and / or a vehicle headlight according to the invention.
- FIG. 1 shows a schematic representation of a first embodiment of a lighting device according to the invention 1.
- the lighting device 1 comprises a reflector 2 with a total reflection surface 2a for reflecting light, wherein the reflection is at least partially in the direction of an optical axis x of the reflector 2, which in the present example with a Axis x of a Cartesian coordinate system oriented to the right coincides with the other axes y and z.
- the lighting device comprises a first light source 3 'and a second light source 3 "for irradiating light onto the reflector 2, wherein the first and the second light source at least in a direction normal to the optical axis x of the reflector 2 - in the present case in the direction the axes y and / or z - are spaced apart.
- the total reflection surface 2a of the reflector 2 has a number of first reflection sub-areas 2a 'facing the first light source 3', which are arranged to image the light irradiated by the first light source 3 'in the form of at least one first light distribution of a first light function.
- the total reflection surface 2a of the reflector 2 additionally has a number of second reflection sub-areas 2a "facing the second light source 3", which are configured to image the light irradiated by the second light source 3 "in the form of a second light distribution of a second light function, the first light distribution deviates from the second light distribution FIG.
- the total reflection surface 2a of the reflector 2 is at least partially composed of alternately juxtaposed first and second reflection sub-areas 2a 'and 2a ", wherein the first and the second light source 3' and 3" are arranged in such an area lying in front of the reflector 2, that their emitted light is at least partially irradiated against the positive direction (which in case of using the lighting device in a vehicle headlamp coincides with the forward running direction of the vehicle) of the optical axis x of the reflector 2 on the reflector 2.
- the arrangement of the light sources 3 'and 3 "and the reflection sub-areas 2a' and 2a" are configured so that, for example, one of the following light functions can be implemented: daytime running light, position light, side marker light, flashing light, low beam, cornering light, high beam, static cornering light, etc
- the total reflection surface 2a is composed exclusively of juxtaposed stripe-shaped first and second reflection surfaces 2a 'and 2a ", adjoining and being connected to adjacent reflection surfaces.
- an imaging optics 4 is shown, which is designed in the present example as a projection lens and the reflector 2 for imaging the reflected light from the reflector 2 is downstream, as indicated by exemplary light beams LS.
- the reflector 2 is in the embodiment according to FIG. 1 formed as a separate optical component.
- FIG. 1a shows a section of a first reflection part surface 2a 'in a detailed view. It can be seen here that the reflection sub-area 2a 'has microstructures 5 for purposefully influencing the light distribution emitted by the reflection sub-area 2a'. Equally or alternatively, such microstructures 5 may be arranged on other reflection sub-areas or on the imaging optics 4.
- FIG. 2 shows a schematic representation of a development of the first embodiment according to FIG. 1 , In it is shown by means of individual light beams, as the first and / or second light source 3 'and 3 "single light rays radiate over the reflector 2 towards a light sensor 8.
- FIG. 3 shows a second embodiment of a lighting device 1 according to the invention, in which the reflector 2 is formed integrally with a light-conducting body 6, which comprises the imaging optics 4 by the reflector 2 is formed on a light-reflecting end portion 6a of the light-conducting body 6.
- the first and second reflection portions 2a 'and 2a are formed as juxtaposed strip-shaped surfaces on the surface of the end portion 6a, respectively, with the first and second reflection portions 2a' and 2a" inclined to each other.
- the reflecting surfaces can also be coated with a light-reflecting layer, which can be applied, for example, by vapor deposition.
- the imaging optics 4 can also have microstructures 5 for the targeted influencing of the light distribution emitted by the imaging optics 4, which in FIG FIG. 3a as a detail of FIG. 3 are shown.
- the design of the reflective sub-surfaces in the form of juxtaposed strips is only an exemplary variant of their design. Likewise, other variants such as a step-like structure are conceivable.
- Collimator elements 7, which are arranged between the reflector 2 and the first and the second light source 3 'or 3 "for focusing the light in the direction of the reflector 2.
- the collimator elements 7 can be designed as separate components can also be made in one piece with the light-conducting body 6. By using the collimator elements 7, it can be ensured that the light emitted by the light sources is incident on the reflector 2 or reflection surfaces at a predeterminable angle, thus ensuring, for example, that all of the Light sources on the reflector 2 incident light is totally reflected on the inclined surfaces.
- the imaging optics 4 can be designed, for example, as a lens but also as a so-called “cushion optic", which consists of a multiplicity of pillow-shaped structures arranged next to one another.
- the lighting device 1 With the lighting device 1 according to the embodiments shown different light functions can be realized in a simple manner using a single reflector.
- the first light source for example, a low-beam function and the second light source take over the cornering function.
- the following combinations are cited, wherein combination pairs are associated with a slash "/" and different pairs are separated by a semicolon " ; ": daytime running light / position light; Daytime running light / side marker light; Daytime running light / flashing light; Flashing light / position light; Flashing light / side marker light; Dipped beam / cornering light; High beam / cornering light; Dipped beam / static cornering light; static cornering light left / static cornering light right; High / Low Beam Matrix Segment a / High / Low Beam Matrix Segment b.
- FIG. 4 shows a sectional view of a vehicle headlamp according to the invention with a lighting device according to the invention 1.
- the light sources 3 'and 3 are arranged in the vicinity of a cover 9 in the front region of the vehicle headlamp thereby lead the light sources (eg laser or LED light sources) power loss mainly against the cover 9 from, whereby the heat can be directed firstly effectively outward and secondly can be used to counteract fogging or icing of the cover and other cooling measures such as fans can be omitted.
- the light sources eg laser or LED light sources
- FIG. 5 shows a detailed representation of a beam path of a reflector 2 of the lighting device according to the invention 1.
- each reflection sub-area 2a ' is at a different angle ⁇ '(each reflection sub-area 2a' is thus different Incident angle ⁇ 'and inclination angle ⁇ ' associated - for better clarity, the angle only to a single reflection part surface 2a 'provided with reference numerals) with respect to the first light source 3' occupies.
- Each reflection sub-area 2a ' is inclined in such a way that it can not be irradiated by the second light source 3 ", for example, the first reflection sub-area 2a' which is in Fig.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Die Erfindung betrifft eine Leuchtvorrichtung (1) für einen Kraftfahrzeugscheinwerfer, umfassend einen Reflektor (2) mit einer Reflexionsgesamtfläche (2a) zur Reflexion von Licht zumindest teilweise in Richtung einer optischen Achse (x) des Reflektors, eine erste und eine zweite Lichtquelle (3', 3") zur Einstrahlung von Licht auf den Reflektor (2), wobei die erste und die zweite Lichtquelle (3', 3") zumindest in einer Richtung normal zur optischen Achse (x) des Reflektors (2) voneinander beabstandet sind, wobei die Reflexionsgesamtfläche (2a) des Reflektors (2) eine Anzahl von der ersten Lichtquelle (3') zugewandten ersten Reflexionsteilflächen (2a') aufweist, die zur Abbildung des von der ersten Lichtquelle (3') eingestrahlten Lichtes in Form zumindest einer ersten Lichtverteilung einer ersten Lichtfunktion eingerichtet sind, wobei die Reflexionsgesamtfläche (2a) des Reflektors (2) eine Anzahl von der zweiten Lichtquelle (3") zugewandten zweiten Reflexionsteilflächen (2a') aufweist, die zur Abbildung des von der zweiten Lichtquelle (3") eingestrahlten Lichtes in Form einer zweiten Lichtverteilung einer zweiten Lichtfunktion eingerichtet sind, wobei die erste Lichtverteilung von der zweiten Lichtverteilung abweicht.The invention relates to a lighting device (1) for a motor vehicle headlight comprising a reflector (2) with a total reflection surface (2a) for reflecting light at least partially in the direction of an optical axis (x) of the reflector, a first and a second light source (3 '). , 3 ") for irradiating light onto the reflector (2), wherein the first and the second light source (3 ', 3") are at least in a direction normal to the optical axis (x) of the reflector (2) spaced from each other, the total reflection surface (2a) of the reflector (2) has a number of first reflection sub - areas (2a ') facing the first light source (3'), which image the light irradiated by the first light source (3 ') in the form of at least one first light distribution the first light function are set up, wherein the total reflection surface (2a) of the reflector (2) comprises a number of second reflection sub-areas (2a ') facing the second light source (3' ') is, which are configured to image the incident light from the second light source (3 ") in the form of a second light distribution of a second light function, wherein the first light distribution deviates from the second light distribution.
Description
Die Erfindung betrifft eine Leuchtvorrichtung für einen Kraftfahrzeugscheinwerfer, umfassend einen Reflektor mit einer Reflexionsgesamtfläche zur Reflexion von Licht zumindest teilweise in Richtung einer optischen Achse des Reflektors, eine erste und eine zweite Lichtquelle zur Einstrahlung von Licht auf den Reflektor, wobei die erste und die zweite Lichtquelle zumindest in einer Richtung normal zur optischen Achse des Reflektors voneinander beabstandet sind, wobei die Reflexionsgesamtfläche des Reflektors eine Anzahl von der ersten Lichtquelle zugewandten ersten Reflexionsteilflächen aufweist, die zur Abbildung des von der ersten Lichtquelle eingestrahlten Lichtes in Form zumindest einer ersten Lichtverteilung einer ersten Lichtfunktion eingerichtet sind, wobei die Reflexionsgesamtfläche des Reflektors eine Anzahl von der zweiten Lichtquelle zugewandten zweiten Reflexionsteilflächen aufweist, die zur Abbildung des von der zweiten Lichtquelle eingestrahlten Lichtes in Form einer zweiten Lichtverteilung einer zweiten Lichtfunktion eingerichtet sind.The invention relates to a lighting device for a motor vehicle headlight, comprising a reflector having a total reflection surface for reflecting light at least partially in the direction of an optical axis of the reflector, a first and a second light source for irradiating light onto the reflector, wherein the first and the second light source at least in a direction normal to the optical axis of the reflector are spaced from each other, wherein the total reflection surface of the reflector comprises a number of the first light source facing first reflection sub-areas, which set up for imaging the radiated light from the first light source in the form of at least a first light distribution of a first light function are, wherein the total reflection surface of the reflector comprises a number of the second light source facing second reflection sub-areas, which is used to image the incident light from the second light source in the form of a second light distribution of a second light function are set up.
Ferner betrifft die Erfindung einen Fahrzeugscheinwerfer mit einer erfindungsgemäßen Leuchtvorrichtung sowie einen Kraftfahrzeug mit einer erfindungsgemäßen Leuchtvorrichtung und/oder einem erfindungsgemäßen Fahrzeugscheinwerfer.Furthermore, the invention relates to a vehicle headlight with a lighting device according to the invention and a motor vehicle with a lighting device according to the invention and / or a vehicle headlight according to the invention.
Leuchtvorrichtungen der eingangs genannten Art sind z.B. aus Scheinwerfern bekannt, bei denen zwei Lichtquellen vor einer Reflektoranordnung befestigt sind, wobei die Reflektoranordnung unterschiedliche Bereiche aufweist, die zur Erfüllung unterschiedlicher Lichtfunktionen vorgesehen sind. So sind beispielsweise Scheinwerfer bekannt geworden, bei denen eine Abblendlichtquelle und eine Fernlichtquelle vor einer einstückigen Reflektoranordnung befestigt sind, wobei die Reflektoranordnung zur Erzeugung zweier unterschiedlicher Lichtverteilungen, nämlich einer Abblendlichtverteilung und einer Fernlichtverteilung, zwei unterschiedliche Reflektorbereiche aufweist. Bei der genannten Anordnung ist es vor allem wichtig, ein Übersprechen von dem Abblendlicht hin zu dem Fernlicht zu vermeiden, was durch entsprechende konstruktive Maßnahmen erreicht werden kann. Eine räumliche sowie bauliche Trennung einzelner Reflektorbereiche zur Umsetzung unterschiedlicher Lichtverteilungen führt zu Beschränkungen hinsichtlich der Baugröße der Leuchtvorrichtung, womit ebenso Beschränkungen bei dessen Design einhergehen.Lighting devices of the type mentioned are known, for example from headlamps, in which two light sources are mounted in front of a reflector assembly, wherein the reflector assembly has different areas that are provided to fulfill different lighting functions. For example, headlamps have become known in which a low-beam source and a high-beam source are mounted in front of a one-piece reflector arrangement, wherein the reflector arrangement for generating two different light distributions, namely a low-beam distribution and a high beam distribution, has two different reflector areas. In the above arrangement, it is especially important to avoid crosstalk from the low beam to the high beam, which can be achieved by appropriate design measures. A spatial and structural separation of individual reflector areas to implement different light distributions leads to restrictions on the size of the lighting device, which also involves limitations in its design.
Eine Aufgabe der Erfindung besteht daher darin, eine Leuchtvorrichtung zu schaffen, die in Ihrer Form weitgehend frei gestaltet werden kann und zum Erzeugen zumindest zweier voneinander unterschiedlicher Lichtverteilungen geeignet ist.An object of the invention is to provide a lighting device that can be designed largely freely in shape and is suitable for generating at least two mutually different light distributions.
Diese Aufgabe wird mit einer Leuchtvorrichtung der eingangs genannten Art gelöst, bei der erfindungsgemäß die Reflexionsgesamtfläche des Reflektors zumindest teilweise aus abwechselnd nebeneinander angeordneten ersten und zweiten Reflexionsteilflächen zusammengesetzt ist, wobei die erste und die zweite Lichtquelle dergestalt in einem vor dem Reflektor liegenden Bereich angeordnet sind, dass ihr abgestrahltes Licht zumindest teilweise entgegen der Richtung der optischen Achse des Reflektors auf den Reflektor gestrahlt wird. Die erfindungsgemäße Leuchtvorrichtung unterliegt keinen besonderen Beschränkungen hinsichtlich ihrer Baugröße. Durch das Zusammensetzen der Reflexionsgesamtfläche aus ersten und zweiten Reflexionsteilflächen ist es möglich zwei oder mehr Lichtfunktionen mittels eines einzelnen Reflektors sowie den Reflektor zugeordneter Lichtquellen zu realisieren. Die Reflexionsgesamtfläche kann dabei im Vergleich zu herkömmlichen Reflektoren deutlich vergrößert werden. Zudem ermöglicht die Anordnung der Lichtquellen vor dem Reflektor insbesondere im Falle des Einsatzes für einen Fahrzeugscheinwerfer eine verbesserte Kühlung der Lichtquellen, da der Bereich vor den Reflektor beispielsweise mit einer Abdeckscheibe abgeschlossen sein kann, über die von den Lichtquellen abgegebene Wärme an die Umgebung abgeben werden kann.This object is achieved with a lighting device of the type mentioned in the present invention, the total reflection surface of the reflector is at least partially composed of alternately juxtaposed first and second reflection surfaces, wherein the first and the second light source are arranged in such an area lying in front of the reflector area, that their radiated light is at least partially irradiated against the reflector against the direction of the optical axis of the reflector. The lighting device according to the invention is not subject to any particular restrictions with respect to its size. By assembling the total reflection surface of the first and second reflection sub-surfaces, it is possible to realize two or more light functions by means of a single reflector as well as the reflector associated light sources. The total reflection area can be significantly increased compared to conventional reflectors. In addition, the arrangement of the light sources in front of the reflector, in particular in the case of use for a vehicle headlamp, enables improved cooling of the light sources, since the area in front of the reflector can be closed, for example, with a cover plate, via which heat emitted by the light sources can be released to the surroundings ,
Zwischen den ersten und zweiten Reflexionsteilflächen bzw. umgekehrt können zudem weitere Reflexionsteilflächen angeordnet sein. Unter dem Ausdruck "optische Achse des Reflektors" wird eine optische Achse verstanden, die in Hauptabstrahlrichtung des Reflektors orientiert ist. Die erste und zweite Lichtfunktion müssen nicht zwingend voneinander unterschiedlich sein. Allerdings sind die Lichtverteilungen, die durch die jeweilige Lichtquelle sowie die zugeordnete Reflexionsteilfläche erzeugt werden, voneinander unterschiedlich. Das soll bedeuten, dass beispielsweise die erste Lichtverteilung und die zweite Lichtverteilung jeweils einen Teil einer Gesamtlichtverteilung ausbilden können. So ist es beispielsweise denkbar, dass die erste Lichtverteilung und die zweite Lichtverteilung gemeinsam eine Abblendlichtverteilung ergeben - die erste Lichtverteilung und die zweite Lichtverteilung also für sich genommen Teillichtverteilungen darstellen.In addition, further reflection sub-areas may be arranged between the first and second reflection sub-areas or vice versa. The term "optical axis of the reflector" is understood to mean an optical axis which is oriented in the main emission direction of the reflector. The first and second light functions do not necessarily have to be different from each other. However, the light distributions that are generated by the respective light source and the associated reflection sub-area, from each other are different. This should mean that, for example, the first light distribution and the second light distribution can each form part of a total light distribution. Thus, it is conceivable, for example, that the first light distribution and the second light distribution together result in a low-beam light distribution - that is, the first light distribution and the second light distribution individually represent partial light distributions.
Unter dem Ausdruck "eine Anzahl von" wird im Rahmen dieser Offenbarung - sofern nicht anders angegeben - eine Anzahl verstanden, die zumindest zwei beträgt und zwei, drei, vier oder mehr, insbesondere sechs, acht, zehn, zwölf oder mehr als zwölf betragen kann. Der Fachmann ist in Anbetracht dieser Offenbarung in der Lage, die Anzahl der jeweiligen Elemente einem Anwendungszweck entsprechend zu wählen. Der Ausdruck "Reflexionsgesamtfläche" bezeichnet die gesamte Fläche des Reflektors, die zur Reflexion von Licht der Lichtquellen eingerichtet ist.The term "a number of" in the context of this disclosure, unless otherwise stated, means a number which is at least two and may be two, three, four or more, in particular six, eight, ten, twelve or more than twelve , The person skilled in the art, in view of this disclosure, is able to choose the number of respective elements according to an application. The term "total reflection area" refers to the entire area of the reflector that is set up to reflect light from the light sources.
Insbesondere kann vorgesehen sein, dass die erste Lichtfunktion und die zweite Lichtfunktion ausgewählt sind aus der Gruppe: Tagfahrlicht, Positionslicht, Seitenmarkierungslicht, Fahrtrichtungsanzeigelicht, Abblendlicht, Abbiegelicht, Fernlicht, statisches Kurvenlicht oder Abbiegelicht. Dem Fachmann sind diese Lichtfunktionen bekannt, wobei die zugehörigen Lichtverteilungen in den einschlägigen Richtlinien sowie Normen festgelegt sind. Beispielhaft wird an dieser Stelle auf die Regelung Nr. 123 der Wirtschaftskommission für Europa der Vereinten Nationen (UN/ECE) - Einheitliche Bedingungen für die Genehmigung von adaptiven Frontbeleuchtungssystemen (AFS) für Kraftfahrzeuge sowie die Regelung Nr. 48 der Wirtschaftskommission der Vereinten Nationen für Europa (UN/ECE) - Einheitliche Bedingungen für die Genehmigung der Fahrzeuge hinsichtlich des Anbaus der Beleuchtungs- und Lichtsignaleinrichtungen verwiesen. Zudem kann es vorgesehen sein, dass die erste und die zweite Lichtfunktion voneinander abweichen, wobei prinzipiell sämtliche Permutationen bzw. Kombinationen der genannten Funktionen denkbar sind. Insbesondere die folgenden Kombinationen lassen sich besonders vorteilhaft umsetzen: Tagfahrlicht / Positionslicht; Tagfahrlicht/Seitenmarkierungslicht; Tagfahrlicht/Fahrtrichtungsanzeigelicht bzw. Blinklicht; Fahrtrichtungsanzeigelicht / Positionslicht; Fahrtrichtungsanzeigelicht / Seitenmarkierungslicht; Abblendlicht / Abbiegelicht; Fernlicht / Abbiegelicht; Abblendlicht / statisches Kurvenlicht; statisches Abbiegelicht links/ statisches Abbiegelicht rechts; oder auch bestimmte Kombination von einzelnen Segmenten einer matrixförmig segmentierten Leuchtvorrichtung, bei der die durch die Leuchtvorrichtung erzeugte Lichtverteilung durch einzelne Segmente zusammengesetzt ist, die z.B. wie folgt kombiniert werden könnten: Fern-/ Abblendlicht-Matrixsegment a / Fern-/Abblendlicht-Matrixsegment.In particular, it can be provided that the first light function and the second light function are selected from the group: daytime running light, position light, side marker light, turn signal light, low beam, cornering light, high beam, static cornering or cornering light. Those skilled in the art are aware of these light functions, the associated light distributions being specified in the relevant guidelines and standards. As an example, reference is made to Regulation No 123 of the United Nations Economic Commission for Europe (UN / ECE) - Uniform provisions for the approval of adaptive front lighting systems (AFS) for motor vehicles and Regulation No 48 of the United Nations Economic Commission for Europe (UN / ECE) - Unified conditions for the approval of vehicles with regard to the installation of lighting and light-signaling devices. In addition, it may be provided that the first and the second light function deviate from one another, wherein in principle all permutations or combinations of said functions are conceivable. In particular, the following combinations can be implemented particularly advantageous: daytime running light / position light; Daytime running light / side marker light; Daytime running light / direction indicator light or flashing light; Direction indicator light / position light; Turn signal light / side marker light; Dipped beam / cornering light; High beam / cornering light; Dipped beam / static cornering light; static cornering light left / static cornering light right; or also a specific combination of individual segments of a matrix-segmented lighting device, in which the light distribution generated by the lighting device is composed of individual segments, e.g. could be combined as follows: high beam / low beam matrix segment a / high beam / low beam matrix segment.
Zudem kann vorgesehen sein, dass die ersten und/oder zweiten Reflexionsteilflächen Mikrostrukturen aufweisen, die zur Ablenkung von Licht hin zu einer dritten Lichtverteilung (ausgewählt von den zuvor angeführten Lichtverteilungen) eingerichtet sind.In addition, provision may be made for the first and / or second reflection sub-areas to have microstructures which are set up to deflect light toward a third light distribution (selected from the light distributions mentioned above).
In einer besonders günstigen und einfachen Ausführungsform der Erfindung kann vorgesehen sein, dass die Gesamtreflexionsfläche ausschließlich aus nebeneinander angeordneten ersten und zweiten Reflexionsteilflächen besteht.In a particularly favorable and simple embodiment of the invention it can be provided that the total reflection surface consists exclusively of juxtaposed first and second reflection sub-surfaces.
Alternativ dazu kann vorgesehen sein, dass die Gesamtreflexionsfläche zumindest eine dritte Reflexionsteilfläche, vorzugsweise eine Anzahl dritter Reflexionsteilflächen, zur Erzeugung einer weiteren Lichtverteilung aufweist.Alternatively, it may be provided that the total reflection surface has at least one third reflection sub-area, preferably a number of third reflection sub-areas, for generating a further light distribution.
Insbesondere kann vorgesehen sein, dass die zumindest eine dritte Reflexionsteilfläche der ersten und/oder der zweiten Lichtquelle zugewandt ist.In particular, it can be provided that the at least one third reflection sub-surface faces the first and / or the second light source.
Auch kann vorgesehen sein, dass die Leuchtvorrichtung eine dritte Lichtquelle aufweist, und die dritte Reflexionsteilfläche der dritten Lichtquelle zugewandt ist.It can also be provided that the lighting device has a third light source, and the third reflection sub-surface of the third light source is facing.
Ergänzend oder alternativ dazu kann vorgesehen sein, dass die Leuchtvorrichtung einen Lichtsensor zur Überprüfung der Lichtfunktion zumindest einer der Lichtquellen aufweist, wobei die durch die zumindest eine dritte Reflexionsteilfläche erzeugte Lichtverteilung dergestalt ausgebildet ist und der Lichtsensor dergestalt angeordnet ist, dass die durch die zumindest eine dritte Reflexionsfläche erzeugte Lichtverteilung auf den Lichtsensor einstrahlt. Dieser Lichtsensor kann beispielsweise mit einer Auswerteeinheit verbunden sein, die den Zustand der Leuchtvorrichtung überwacht und bei Rückschluss auf einen fehlerhaften Zustand entsprechende Maßnahmen wie beispielsweise eine Fehleranzeige setzt.Additionally or alternatively, it may be provided that the lighting device has a light sensor for checking the light function of at least one of the light sources, wherein the light distribution generated by the at least one third reflection sub-area is formed and the light sensor is arranged such that the at least a third Reflected surface irradiation light distribution on the light sensor. This light sensor can be connected to an evaluation unit, for example, which monitors the state of the lighting device and, if it concludes that it has a faulty state, sets appropriate measures, such as an error indication.
Zur Implementierung einer dritten Lichtfunktion kann vorgesehen sein, dass die durch die zumindest eine dritte Reflexionsteilfläche erzeugte Lichtverteilung eine Lichtverteilung einer Lichtfunktion ausgewählt aus der folgenden Gruppe ist: Tagfahrlicht, Positionslicht, Seitenmarkierungslicht, Fahrtrichtungsanzeigelicht, Abblendlicht, Abbiegelicht, Fernlicht, statisches Kurvenlicht, Abbiegelicht.To implement a third light function, it may be provided that the light distribution generated by the at least one third reflection sub-area is a light distribution of a light function selected from the following group: daytime running light, position light, side marker light, turn signal light, low beam, cornering light, high beam, static cornering light, cornering light.
In einer besonders zweckmäßigen Ausgestaltung der Erfindung kann vorgesehen sein, dass einzelne Reflexionsteilflächen, insbesondere die ersten und zweiten Reflexionsteilflächen, streifenförmig ausgebildet und nebeneinander angeordnet sind, wobei nebeneinander angeordnete Streifen miteinander verbunden sind. Die Verbindung der Streifen kann entweder direkt miteinander oder auch über weitere dazwischenliegende Streifen, beispielsweise Streifen einer dritten Reflexionsteilfläche, erfolgen.In a particularly expedient embodiment of the invention, it can be provided that individual reflection sub-areas, in particular the first and second reflection sub-areas, are strip-shaped and arranged next to one another, whereby strips arranged next to one another are connected to one another. The connection of the strips can either directly with each other or via other intermediate strips, such as strips of a third reflection sub-surface done.
Um ein Übersprechen des von den einzelnen Lichtquellen abgestrahlten Lichts zu verhindern, kann vorgesehen sein, dass die erste Lichtquelle unter ersten Einstrahlwinkeln und die zweite Lichtquelle unter zweiten Einstrahlwinkeln auf die jeweiligen Reflexionsteilflächen strahlen, wobei jede Reflexionsteilfläche einen Neigungswinkel aufweist, der den jeweiligen Einstrahlwinkel der nicht zugeordneten Lichtquelle übertrifft, wobei der Winkel auf die optische Achse des Reflektors bezogen sind. Dabei können die Lichtquellen beispielsweise in einem Winkel zwischen 20° und 75° in Bezug auf die optische Achse angeordnet sein. Die Anordnung Quer zur optischen Achse des Reflektors erlaubt eine kurze Bauweise der Leuchtvorrichtung in Richtung der optischen Achse des Reflektors.In order to prevent crosstalk of the light emitted by the individual light sources, it may be provided that the first light source radiate at first angles of incidence and the second light source at second angles of incidence onto the respective reflection faces, each reflecting portion having an angle of inclination which does not correspond to the respective angle of incidence assigned light source exceeds, wherein the angle are based on the optical axis of the reflector. In this case, the light sources can be arranged, for example, at an angle between 20 ° and 75 ° with respect to the optical axis. The arrangement transverse to the optical axis of the reflector allows a short construction of the lighting device in the direction of the optical axis of the reflector.
Zudem kann vorgesehen sein, dass die Leuchtvorrichtung eine Abbildungsoptik aufweist, die dem Reflektor zur Abbildung zumindest eines Teils des von dem Reflektor reflektierten Lichtes nachgelagert ist. Die Abbildungsoptik kann als Projektionslinse oder beispielsweise als Kissenoptik ausgeführt sein.In addition, it can be provided that the lighting device has an imaging optics, which is downstream of the reflector for imaging at least a portion of the reflected light from the reflector. The imaging optics can be designed as a projection lens or, for example, as a cushion optic.
Zudem kann vorgesehen sein, dass die Abbildungsoptik Mikrostrukturen zur gezielten Beeinflussung der durch die Abbildungsoptik abgestrahlten Lichtverteilung aufweist. Unter dem Ausdruck "Mikrostrukturen" werden Vorsprünge oder Vertiefungen an der Oberfläche des jeweiligen optischen Bauteils verstanden, deren Abmessung maximal einige Zehntelmillimeter beträgt und die dazu geeignet sind, das durch das jeweilige optische Element abgestrahlte Lichtbild zu beeinflussen. So können die Mikrostrukturen beispielsweise dazu eingerichtet sein, Licht gezielt in eine bestimmte Richtung abzulenken. Alternativ dazu können diese ebenso zur Erzeugung einer diffusen Abstrahlung eingerichtet sein.In addition, it can be provided that the imaging optics has microstructures for selectively influencing the light distribution emitted by the imaging optics. The term "microstructures" is understood to mean protrusions or depressions on the surface of the respective optical component whose dimensions are at most a few tenths of a millimeter and which are suitable for influencing the light image emitted by the respective optical element. For example, the microstructures can be set up to deflect light in a specific direction in a targeted manner. Alternatively, they may also be configured to generate a diffuse radiation.
Ferner kann vorgesehen sein, dass der Reflektor als ein separates optisches Bauteil ausgebildet ist.Furthermore, it can be provided that the reflector is designed as a separate optical component.
Alternativ dazu kann vorgesehen sein, dass der Reflektor einstückig mit einem lichtleitenden Körper ausgebildet ist, der die Abbildungsoptik umfasst, indem der Reflektor an einem lichtreflektierenden Endabschnitt des lichtleitenden Körpers ausgebildet ist. Diese Ausführung ist somit besonders kompakt, wobei durch die einstückige Ausführung eine durch Wärmedehnung oder mechanische Erschütterungen verursachte Fehlpositionierung des Reflektors in Bezug auf die Abbildungsoptik weitgehend verhindert werden kann.Alternatively, it may be provided that the reflector is integrally formed with a light-conducting body, which comprises the imaging optics, in that the reflector is formed on a light-reflecting end portion of the light-conducting body. This design is thus particularly compact, with a one-piece design a caused by thermal expansion or mechanical shocks incorrect positioning of the reflector with respect to the imaging optics can be largely prevented.
Dabei kann es besonders günstig sein, wenn einzelne Reflexionsteilflächen, insbesondere die ersten und zweiten Reflexionsteilflächen, als nebeneinander angeordnete streifenförmige Flächen an der Oberfläche des Endabschnitts ausgebildet sind, wobei die ersten und die zweiten Reflexionsteilflächen zueinander geneigt sind. In Abhängigkeit von dem Winkel, unter dem das Licht auf die jeweiligen Reflexionsteilflächen einfällt, kann die Neigung der Reflexionsteilflächen in Bezug zu dem einfallenden Licht bereits ausreichend sein, um eine Totalreflexion zu ermöglichen. Sofern die Neigung der Flächen in Bezug auf die Lichtquelle nicht dazu ausreicht eine Totalreflexion zu ermöglichen, kann es günstig sein, wenn die streifenförmigen Flächen mit einer lichtreflektierenden Schicht beschichtet sind. Insbesondere können die jeweiligen Reflexionsteilflächen dergestalt geneigt sein, dass nur bestimmte Reflexionsteilflächen für die jeweilige Lichtquelle "sichtbar" bzw. anstrahlbar sind. So können beispielweise die ersten Reflexionsteilflächen so angeordnet sein, dass die zweiten Reflexionsteilflächen aus Sicht der ersten Lichtquelle im Schatten der ersten Reflexionsteilflächen liegen. Gleichermaßen können auch die ersten Reflexionsteilflächen aus Sicht der zweiten Lichtquelle im Schatten der ersten Reflexionsteilflächen liegen.It may be particularly favorable if individual reflection sub-areas, in particular the first and second reflection sub-areas, are formed as juxtaposed strip-shaped areas on the surface of the end portion, wherein the first and the second reflection sub-areas are inclined to each other. Depending on the angle at which the light is incident on the respective reflection sub-areas, the inclination of the reflection sub-areas with respect to the incident light may already be sufficient to allow total reflection. Unless the inclination of the surfaces with respect to the light source is sufficient to allow total reflection, it may be beneficial if the strip-shaped surfaces are coated with a light-reflecting layer. In particular, the respective reflection sub-areas may be inclined in such a way that only certain reflection sub-areas are "visible" or can be illuminated for the respective light source. For example, the first reflection sub-areas may be arranged such that the second reflection sub-areas are in the shadow of the first reflection sub-areas, as viewed from the first light source. Likewise, the first reflection sub-areas may also be in the shadow of the first reflection sub-areas as viewed from the second light source.
Zudem kann vorgesehen sein, dass einzelne Reflexionsteilflächen, insbesondere die ersten und zweiten Reflexionsteilflächen, Mikrostrukturen zur gezielten Beeinflussung der durch die Reflexionsteilflächen abgestrahlten Lichtverteilung aufweisen.In addition, it can be provided that individual reflection sub-areas, in particular the first and second reflection sub-areas, have microstructures for selectively influencing the light distribution emitted by the reflection sub-areas.
Zur besonders effizienten Einstrahlung von Licht auf den Reflektor bzw. auf die jeweiligen Reflexionsteilflächen kann vorgesehen sein, dass zumindest zwischen dem Reflektor und der ersten und der zweiten Lichtquelle jeweils ein Kollimatorelement zur Bündelung des Lichtes in Richtung des Reflektors angeordnet ist. Das Kollimatorelement ist dazu eingerichtet, von der Lichtquelle abgestrahltes Licht parallel in Richtung des Reflektors, insbesondere in Richtung der jeweiligen Reflexionsteilfläche, zu richten.For the particularly efficient irradiation of light onto the reflector or onto the respective reflection sub-areas, provision can be made for at least one collimator element for bundling the light to be arranged in the direction of the reflector, at least between the reflector and the first and the second light source. The collimator element is set up to direct light emitted by the light source in parallel in the direction of the reflector, in particular in the direction of the respective reflection sub-area.
Besonders günstig kann es sein, wenn zumindest eine der Lichtquellen, vorzugsweise alle Lichtquellen, zumindest eine LED umfasst. Ergänzend oder alternativ dazu können natürlich auch beliebige andere Lichtquellen, beispielsweise Laserlichtquellen, Halogenlichtquellen, Xenonlichtquellen etc. vorgesehen sein.It can be particularly favorable if at least one of the light sources, preferably all light sources, comprises at least one LED. Additionally or alternatively, of course, any other light sources, such as laser light sources, halogen light sources, xenon light sources, etc. may be provided.
Ein weiterer Aspekt der Erfindung betrifft einen Fahrzeugscheinwerfer, insbesondere einen Kraftfahrzeugscheinwerfer, umfassend eine erfindungsgemäße Leuchtvorrichtung sowie eine Abdeckscheibe, wobei die Leuchtvorrichtung dergestalt angeordnet ist, dass die Rückseite der Lichtquellen der Abdeckscheibe zugewandt ist. Damit können die Lichtquellen besonders effektiv gekühlt werden, wodurch ihre Leistung und/oder ihre Lebensdauer erhöht werden kann. Außerdem kann die Abwärme der Lichtquelle zum Enteisen bzw. Enttauen der Abdeckscheibe verwendet werden.Another aspect of the invention relates to a vehicle headlight, in particular a motor vehicle headlight, comprising a lighting device according to the invention and a cover, wherein the lighting device is arranged such that the back of the light sources facing the cover. Thus, the light sources can be cooled particularly effectively, whereby their performance and / or their life can be increased. In addition, the waste heat of the light source for defrosting or defrosting the cover can be used.
Weiterer Aspekt der Erfindung betrifft ein Fahrzeug mit einer erfindungsgemäßen Leuchtvorrichtung und/oder einem erfindungsgemäßen Fahrzeugscheinwerfer.Another aspect of the invention relates to a vehicle with a lighting device according to the invention and / or a vehicle headlight according to the invention.
Die Erfindung ist im Folgenden anhand beispielhafter und nicht einschränkender Ausführungsformen näher erläutert, die in den Figuren veranschaulicht sind. Darin zeigt
-
eine schematische Darstellung einer ersten Ausführungsform einerFigur 1erfindungsgemäßen Leuchtvorrichtung 1, -
Figur 1a eine Detaildarstellung einer Mikrostruktur der Leuchtvorrichtung gemäß ,Figur 1 -
eine schematische Darstellung einer Weiterbildung der ersten Ausführungsform gemäßFigur 2 ,Figur 1 -
eine zweite Ausführungsform einer erfindungsgemäßen Leuchtvorrichtung,Figur 3 -
Figur 3a eine Detaildarstellung einer Mikrostruktur der Leuchtvorrichtung gemäßFigur 3 , -
eine Schnittdarstellung eines erfindungsgemäßen Fahrzeugscheinwerfers mit einer erfindungsgemäßen Leuchtvorrichtung,Figur 4 und Figur 5 eine Detaildarstellung eines Strahlenganges eines Reflektors der erfindungsgemäßen Leuchtvorrichtung.
-
FIG. 1 a schematic representation of a first embodiment of alighting device 1 according to the invention, -
FIG. 1a a detailed representation of a microstructure of the lighting device according toFIG. 1 . -
FIG. 2 a schematic representation of a development of the first embodiment according toFIG. 1 . -
FIG. 3 a second embodiment of a lighting device according to the invention, -
FIG. 3a a detailed representation of a microstructure of the lighting device according toFIG. 3 . -
FIG. 4 a sectional view of a vehicle headlamp according to the invention with a lighting device according to the invention, - and
FIG. 5 a detailed representation of a beam path of a reflector of the lighting device according to the invention.
In den folgenden Figuren bezeichnen - sofern nicht anders angegeben - gleiche Bezugszeichen gleiche Merkmale.In the following figures, unless otherwise stated, like reference numerals designate like features.
Die Reflexionsgesamtfläche 2a des Reflektors 2 weist eine Anzahl von der ersten Lichtquelle 3' zugewandten ersten Reflexionsteilflächen 2a' auf, die zur Abbildung des von der ersten Lichtquelle 3' eingestrahlten Lichtes in Form zumindest einer ersten Lichtverteilung einer ersten Lichtfunktion eingerichtet sind. Die Reflexionsgesamtfläche 2a des Reflektors 2 weist zudem eine Anzahl von der zweiten Lichtquelle 3" zugewandten zweiten Reflexionsteilflächen 2a" auf, die zur Abbildung des von der zweiten Lichtquelle 3" eingestrahlten Lichtes in Form einer zweiten Lichtverteilung einer zweiten Lichtfunktion eingerichtet sind, wobei die erste Lichtverteilung von der zweiten Lichtverteilung abweicht. Wie aus
Die Anordnung der Lichtquellen 3' und 3" sowie die Reflexionsteilflächen 2a' und 2a" sind so ausgestaltet, dass beispielsweise jeweils eine der folgenden Lichtfunktionen umgesetzt werden können: Tagfahrlicht, Positionslicht, Seitenmarkierungslicht, Blinklicht, Abblendlicht, Abbiegelicht, Fernlicht, statisches Kurvenlicht, etc. In der Ausführungsform gemäß
In
Zudem sind in
Die Abbildungsoptik 4 kann beispielsweise als Linse aber ebenso als sogenannte "Kissenoptik" ausgeführt sein, die aus einer Vielzahl an kissenförmigen nebeneinander angeordneten Strukturen besteht.The
Mit der Leuchtvorrichtung 1 gemäß den gezeigten Ausführungsbeispielen können unterschiedliche Lichtfunktionen unter Verwendung eines einzigen Reflektors in einfacher Weise realisiert werden. So kann die erste Lichtquelle beispielweise eine Abblendlichtfunktion und die zweite Lichtquelle die Abbiegelichtfunktion übernehmen. Beispielhaft werden die folgenden Kombinationen angeführt, wobei Kombinationspaare mit einen Schrägstrich "/" verbunden sind und unterschiedliche Paare voneinander durch einen Strichpunkt ";" getrennt sind: Tagfahrlicht / Positionslicht; Tagfahrlicht/Seitenmarkierungslicht; Tagfahrlicht/Blinklicht; Blinklicht / Positionslicht; Blinklicht / Seitenmarkierungslicht; Abblendlicht / Abbiegelicht; Fernlicht / Abbiegelicht; Abblendlicht / statisches Kurvenlicht; statisches Abbiegelicht links/ statisches Abbiegelicht rechts; Fern-/Abblendlicht-Matrixsegment a / Fern-/Abblendlicht-Matrixsegment b.With the
In Anbetracht dieser Lehre ist der Fachmann in der Lage, ohne erfinderisches Zutun zu anderen, nicht gezeigten Ausführungsformen der Erfindung zu gelangen. Die Erfindung ist daher nicht auf die gezeigten Ausführungsformen beschränkt. Auch können einzelne Aspekte der Erfindung bzw. der Ausführungsformen aufgegriffen und miteinander kombiniert werden. Wesentlich sind die der Erfindung zugrunde liegenden Gedanken, die durch einen Fachmann in Kenntnis dieser Beschreibung in mannigfaltiger Weise ausgeführt werden können und trotzdem als solche aufrechterhalten bleiben.In view of this teaching, one skilled in the art will be able to arrive at other, not shown embodiments of the invention without inventive step. The invention is therefore not limited to the embodiments shown. Also, individual aspects of the invention or embodiments can be picked up and combined become. Essential are the ideas underlying the invention, which can be performed by a person skilled in the knowledge of this description in a variety of ways and still remain maintained as such.
Claims (15)
wobei die Reflexionsgesamtfläche (2a) des Reflektors (2) eine Anzahl von der zweiten Lichtquelle (3") zugewandten zweiten Reflexionsteilflächen (2a") aufweist, die zur Abbildung des von der zweiten Lichtquelle (3") eingestrahlten Lichtes in Form einer zweiten Lichtverteilung einer zweiten Lichtfunktion eingerichtet sind, wobei die erste Lichtverteilung von der zweiten Lichtverteilung abweicht,
dadurch gekennzeichnet, dass
die Reflexionsgesamtfläche (2a) des Reflektors (2) zumindest teilweise aus abwechselnd nebeneinander angeordneten ersten und zweiten Reflexionsteilflächen (2a', 2a") zusammengesetzt ist,
wobei die erste und die zweite Lichtquelle (3', 3") dergestalt in einem vor dem Reflektor (2) liegenden Bereich angeordnet sind, dass ihr abgestrahltes Licht zumindest teilweise entgegen der Richtung der optischen Achse (x) des Reflektors (2) auf den Reflektor (2) gestrahlt wird.Lighting device (1) for a motor vehicle headlight, comprising
wherein the total reflection surface (2a) of the reflector (2) has a number of second reflection sub-areas (2a ") facing the second light source (3") which image the light irradiated by the second light source (3 ") in the form of a second light distribution second light function are set up, wherein the first light distribution deviates from the second light distribution,
characterized in that
the total reflection surface (2a) of the reflector (2) is at least partially composed of alternately juxtaposed first and second reflection sub-areas (2a ', 2a "),
wherein the first and the second light source (3 ', 3 ") are arranged in a region located in front of the reflector (2) such that their emitted light is at least partially directed against the direction of the optical axis (x) of the reflector (2) on the Reflector (2) is blasted.
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ATA50689/2017A AT520345B1 (en) | 2017-08-18 | 2017-08-18 | Lighting device for a motor vehicle headlight |
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DE102020102291A1 (en) | 2020-01-30 | 2021-08-05 | HELLA GmbH & Co. KGaA | Lighting device for vehicles |
EP3798507A4 (en) * | 2018-05-22 | 2022-03-23 | Ichikoh Industries, Ltd. | Vehicle lamp |
WO2023020681A1 (en) * | 2021-08-16 | 2023-02-23 | Lotus Tech Innovation Centre Gmbh | Cornering light device for a vehicle projection module and vehicle light system comprising at least one such cornering light device |
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DE102019123936A1 (en) * | 2019-09-06 | 2021-03-11 | Automotive Lighting Reutlingen Gmbh | Lighting device and projection module for such a lighting device |
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Also Published As
Publication number | Publication date |
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EP3447371B1 (en) | 2022-11-16 |
CN109578929A (en) | 2019-04-05 |
AT520345A1 (en) | 2019-03-15 |
AT520345B1 (en) | 2019-06-15 |
CN109578929B (en) | 2021-08-03 |
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